CA1151978A - Pneumohydraulic pumping station - Google Patents
Pneumohydraulic pumping stationInfo
- Publication number
- CA1151978A CA1151978A CA000371680A CA371680A CA1151978A CA 1151978 A CA1151978 A CA 1151978A CA 000371680 A CA000371680 A CA 000371680A CA 371680 A CA371680 A CA 371680A CA 1151978 A CA1151978 A CA 1151978A
- Authority
- CA
- Canada
- Prior art keywords
- pneumohydraulic
- pneumatic
- valve
- hydraulic
- intensifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000006722 reduction reaction Methods 0.000 claims 2
- GRYSXUXXBDSYRT-WOUKDFQISA-N (2r,3r,4r,5r)-2-(hydroxymethyl)-4-methoxy-5-[6-(methylamino)purin-9-yl]oxolan-3-ol Chemical compound C1=NC=2C(NC)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1OC GRYSXUXXBDSYRT-WOUKDFQISA-N 0.000 claims 1
- 229940084430 four-way Drugs 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
- 101150034533 ATIC gene Proteins 0.000 description 5
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 2
- ZPEZUAAEBBHXBT-WCCKRBBISA-N (2s)-2-amino-3-methylbutanoic acid;2-amino-3-methylbutanoic acid Chemical compound CC(C)C(N)C(O)=O.CC(C)[C@H](N)C(O)=O ZPEZUAAEBBHXBT-WCCKRBBISA-N 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
- F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
- F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
- F04B9/133—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
- F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
- F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
- F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
- F01L25/063—Arrangements with main and auxiliary valves, at least one of them being fluid-driven the auxiliary valve being actuated by the working motor-piston or piston-rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
- F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
- F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
- F04B9/135—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Reciprocating Pumps (AREA)
- Pipeline Systems (AREA)
- Multiple-Way Valves (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
PNEUMOHYDRAULIC PUMPING STATION
Abstract of the Disclosure The pneumohydraulic pumping station comprises a pneumohydraulic double-action intensifier (2) whose pneu-matic chambers 3 and 4 are communicated with the outlets of a pneumatic power directional control valve (7). The hydraulic chambers of the pneumohydraulic double-action intensifier (2) are communicated via pressure and the exhaust lines (14, 15 with an actuating hydraulic motor (1). The pneumohydraulic pumping station includes a pneumatic accumulator (22) connected to a pressure line (14). The pneumohydraulic doubleaction intensifier (2) has pneumatic limit switches (26, 27). The pneumohydra-ulic pumping station has a pneumohydraulic unidirectional intensifier (30) with a pneumatic limit switch (33).
Pneumatic chambers (30a, 30b) of the pneumohydraulic unidirectional intensifier (30) are communicated with the outlets of a four-way two-position control directional valve 34. The pneumohydraulic pumping station provides for the continuous operating mode of the actuating hydraulic motor (1).
Fig.
Abstract of the Disclosure The pneumohydraulic pumping station comprises a pneumohydraulic double-action intensifier (2) whose pneu-matic chambers 3 and 4 are communicated with the outlets of a pneumatic power directional control valve (7). The hydraulic chambers of the pneumohydraulic double-action intensifier (2) are communicated via pressure and the exhaust lines (14, 15 with an actuating hydraulic motor (1). The pneumohydraulic pumping station includes a pneumatic accumulator (22) connected to a pressure line (14). The pneumohydraulic doubleaction intensifier (2) has pneumatic limit switches (26, 27). The pneumohydra-ulic pumping station has a pneumohydraulic unidirectional intensifier (30) with a pneumatic limit switch (33).
Pneumatic chambers (30a, 30b) of the pneumohydraulic unidirectional intensifier (30) are communicated with the outlets of a four-way two-position control directional valve 34. The pneumohydraulic pumping station provides for the continuous operating mode of the actuating hydraulic motor (1).
Fig.
Description
~ ~t~ 9 ~ ~
PNEUMOHYDRAULIC PUMPIN~ S~A~ION
The prosont i~vention relate~ ~o pumpin~ ~tatio~s of technologic~l ~quipment and, more ~pecificall~ to a pneumo-hydraulic pumping ~tation.
~ he pnoumohydraulic pumping station of the pre~ont in-ventio~ ca~ be u~ed mo3t e~ficiently in drives of industrial robots~
The pneumohydraulic pumping ~tation according to th~
present invention can also be utilized in drives of lathe~, ~lding machines, for~e-and-press equipment, in bellows form-ing ~ystem~, in automatic assembly machines, as well as in drive~ of ~teering gcars and in obher devicos.
A prior art pneumohydraulic pumping ~tation for supply-ing periodically under pr~ssure a prespecified portion o~
working fluid to an actuating hydraulic motor operating with a periodic cycle i8 weidely known.
~ his known pneumohydraulic pumping ~tation compri~es a pn~umohydraulic double-action intencifior. ~ho pneumohydraulic pump~ng station al~o comprisos a pneumatic power directional control valve whos~ outlets are communicated wlth pneumatic chamber~ of th~ pneumo4ydraulic double-actio~ inten~ifier.
~ he pneumatic power directional control valve further comprises co~trol chambers and a~ inlet being communicated with a compressed ga~ source.
~ he pneumohydraulic double-action intensifier also ha~
hydraulic chambers whose outlets are commw~icated ~ia hydra-ulic pressure and exhaust line~ with an actuati~g hydraulic motor.
;~ 51 ~7 8
PNEUMOHYDRAULIC PUMPIN~ S~A~ION
The prosont i~vention relate~ ~o pumpin~ ~tatio~s of technologic~l ~quipment and, more ~pecificall~ to a pneumo-hydraulic pumping ~tation.
~ he pnoumohydraulic pumping station of the pre~ont in-ventio~ ca~ be u~ed mo3t e~ficiently in drives of industrial robots~
The pneumohydraulic pumping ~tation according to th~
present invention can also be utilized in drives of lathe~, ~lding machines, for~e-and-press equipment, in bellows form-ing ~ystem~, in automatic assembly machines, as well as in drive~ of ~teering gcars and in obher devicos.
A prior art pneumohydraulic pumping ~tation for supply-ing periodically under pr~ssure a prespecified portion o~
working fluid to an actuating hydraulic motor operating with a periodic cycle i8 weidely known.
~ his known pneumohydraulic pumping ~tation compri~es a pn~umohydraulic double-action intencifior. ~ho pneumohydraulic pump~ng station al~o comprisos a pneumatic power directional control valve whos~ outlets are communicated wlth pneumatic chamber~ of th~ pneumo4ydraulic double-actio~ inten~ifier.
~ he pneumatic power directional control valve further comprises co~trol chambers and a~ inlet being communicated with a compressed ga~ source.
~ he pneumohydraulic double-action intensifier also ha~
hydraulic chambers whose outlets are commw~icated ~ia hydra-ulic pressure and exhaust line~ with an actuati~g hydraulic motor.
;~ 51 ~7 8
- 2 -~ he h~draulic pres~ure and exhau~t lines co~ain hydra-ulic control e~uipme~t having a bridge of hydraulic unidirec-tio~al re~trictor valve~ who~e appropriate pair of diagonally opposlte corners are connected to the hydraul~c chambers o~
the pneumohydraulic double-action i~te~sifier. Another pair of diagonally oppo~ite corner~ of this bridge are communica-ted via the hydraulic pressure and exhaust li~es with the in-let and the outlet of a hydraulic ~ix-way three-position di-re¢tional control ~alve bain~ ad~pted to provide the required operating cycle of the actuatinK hydraulic motor, ~ his hydraulic con~rol equipment al~o compri~es control-led unidirectional hydraulic restrictor valves intended to provide al~ernati~g feed of the 4~draulic chamber~ of the pneumohydraul~c double-action inten~ifier with a capability of compen~ati~g a voluminar difference of working fluid dis-charged by turns ~rom the rod chamber and the pi3ton ehamber of the aetuating h~draullc motor. ~hese eontrolled unidireeti-onal hydraulic restrietor valves are eon~eeted to the k~dra-ulic ehamber~ o~ the pneumohydraulie double-action i~tensi~ier and to the bridge o~ hydraulie unidireetion~l restrietor valve~.
Depend~ng on pre~ure in pneu~atie chambers o~ the double-action intensi~ier~ each hydraulic chamber thereo~ periodical-ly function~ a~ pres~ure chamber and exhaust chamber, while sections of the hydraulie lin9s co~necting these hydraulie chamber~ ~ith the bridge o~ hydraulic unidirectional restric-tor valves operate by turns as seetions of pre~sure line~ or e~haust lines.
~ he hydraulic uni~irectio~al re~trictor ~alve~ o~ ~aid brîd~e are further connected through permane~t pressure and exhaust sectio~s o~ hydraulic line3 and through the hydraulic six-way three position directional control valve to the hyd-raulic chambers o~ the actuatin~ hydraulic motor.
~ he knowu pneumoh~draulic pumpin~ station does not provide for a continuous mode o~ operation of the actuating hydraulic motor.
~ his i~ due to the fact that while reversing the pneumo-hydraulic double-action inte~si~ier~ working ~lui~ under pressure is not supplied to the actuating hydraulic motor, since it takes some time to bleed compressed air from one chamber to another of the p~umohydraulic double-~ction inten-si~ier during which no pressure i~ created in the hyd~aulic chamber of the pneumohydraulic double-action intensifier.
~ his restricts to a considerable degree the applicability of the known prior-art ~tation. Up-to-date technological equipment o~tcn requires the continuous operation mode to be reali~ed.
It is there~ore the principle object o~ the present in-vention to provide a pneumohydraulic pumping station enabling the continuous operatinæ mode o~ the actuating hydraulic motor.
It is another object of the present invention to provid~
a pneumohydraulic pumping station ha~i~g high operational re-liability whe~ rever~ing the pneumohydraulic double-action inte~sifier.
~ hese object~ are attainad in a pheumohydraulic pump-ing station comprisi~g a pneumohydraulic double-actio~ inte~-sifier whose pneumatic chamber~ are communicated with outputs of a pneu~atic power directional co~trol valve also having co~trol chambers and an inlet being in commu~ication with a ~ource of compre~sed air, hydraulic chambers o~ the pneumohyd-raulic double-actio~ ntensifier bei~g communicated through a pressure line and an exhaust line having hydraulic control equipment with an actuating hydraulic motor, which,according to the present invention, comprises a pneumohydraulic accumu-lator connected via a controlled unidirectional h~draulic restrictor valve and via a hydraulic reduction valve to the pres~ure line, whereas the pneumohydraulic double-action in-tensifier has pneumatic limit switches whose outlets are com-municated with control chambers of the pneumatic power direc-tional control valve and with inlets of a pneumatic flow dividing OR valve having an outlet being communicated with a con~rol chamber of the controlled unidirectional 4ydraulic restrictor valve of the pneu~o4ydraulic accumulator~ while in-let~ of these pneumatic limit switches being communicated via a p~cumatic reducer with a compen~ating vessel, and are also attained in that the pneumohydraulic pumpiLg statio~ includes a pneumo4ydrau~ic unidirectional intan~ifier with a pneumatic limit switch whose inlet i8 communicated with a source of comprRssed gas, a pneumatic piston chamber of the pneumohyd-raulic unidirectional intensifier being communicated throu~h a time relay and a pneumatic unidirectional restrictor valve bei~g connected in parallel thereto and a pneumatic rod cham-ber thereof directly with outlet~ o~ a p~eumatic four-way two-po~ition directional control valve who~e inlet is communica-ted wlth th~ source of compressed ga~, one control chamber of the pneumatic four-way two-position directional control valve bei~g communicated via another p~eumatic ~low-dividing OR valve with outlet~ o~ p~eumatic limit switche~ o~ the p~eumohydraulic double-action i~tensifier, wherea~ another control chamber of the pneumatic four-way two-po~ition direc-tional control valve beiDg communicated with an outlet of the pneumatic limit switch of the pneumohydraulic unidirectional inten~ifier whose hydraulic chamber i8 communicated via hyd-raulic unidirectional restric~or valve with the compensating vessel .
It is expendient that the pneumohydraulic unidirectional intensi~ier i~ chosen ~uch that the intensi~ c~tio~ factor thereof be greater than that of the p~eumohydraulic double action intensifier.
~ he pneumohydraulic pumpin~ ~tation, according to the present inve~tion, provides ~or the continuous operation mode of the actuati~g hydraulic motor, ~ince the pneumohydraulic accumulator i~stalled in the pressure line i~ combination with appropriate control equipment excludes a po~ ility o~
drops (the ~sence) of pressure in working fluid at the outlet of the pneumohydraulic pQmping ~tatio~.
~ he pneumohydraulic pumping station eliminates spurious signals in a pneumatic control system inasnuch as all eleme~ts 37l3 thereo~` are actuated in sequence. The propDsed pneumohydraulic pumping station ~eatures a su:fficiently simple cDnstructi~n, is reliable ir~ ~peratiDn and has 1DW PDWer C~nSUmPtiDn.
Given hereinbelow is a detailed description of a spacific e~emplary embodiment of the present invention to be read in conjunctiDn witb the attached drawin~, wherein a pneumohydraulic diagram oi` the pneumobydraulic pumping sta-tion according tc ~his invention is repressnted.
~ he proposed pneumohydraulic pumping station is inten-ded for supplying under pressure working fluid to the actu-ating hydraulic motor 1.
The pneumohydraulic pumping station comprises a pneumo-hgdraulic double-action intensi~ier 2 of any known suitable construction having pneumatic chambers 3 and 4 and hydrau-lic chambers 5 and 6. ~he pneumohydraulic doubla-actiDn in-tensifier 2 is provided with a pneumatic power directional cont-rol valve 7 also of any known suitable construction and having control chambers 8 and 9. An inlet 10 of the pneumatic power directional control valve 7 i~ communicated with a source 11 o~ compressed ga~, while outlets 12, 13 of thc pneumatic power directional control valve 7 are communicated with pneumatic chambers 3, 4 of the pneumohydraulic double action inten~ifi-er 2.
The pncumohydraulic double-action intensifier 2 bas out-lets 5a, 6a of the hydraulic chambers 5, 6 bein~ connected via hydraulic pressure line 14 and hydraulic exhaust line 15 tD inlets DP a hydraulic s$x-way three-po~ition directional cvntrol valve 16 o~ any know~ initable construction whose outlet~ are communicated with appropriate chamber~ of the artuatin~ hydraulic mo-tor 1.
~ ydraulic lines 14, 15 include hydraulic co~trol equip~e~t compri~ing a bridge 17 of hydraulic unid;recti-onal restrictor valve~ 17a, 17b, 17c~ 17d of any known con~truction. Diagonally opposite pair of cornsrs in the bridge 17 o~ hydraulic unidirectional restrictor valves are ¢onnected to output~ 5a, 6a o~ the pneumohydraulic double-action inten~ifier 2.
Sections 18, 19 o~ the hydraulic line~ 14~ 15 connec-ti~g the outlets 5a, 6a of the pneumohydraulic double~ac-tion intensifier 2 to the bridge 17, depending on pressures in the hydraulic chambers 5, 6, alte~ately act either as pressure section~ or as exhaust sections, while a~y other section of the h~draulic lines 14, 15 connecting the bridge 17 of hydraullc uniairectional restrictor valves to the hyd-raulic 8i~-way three-position directional control valve 16 acts permanently as a pressure line section indicated by the same Ref. No. 14 or as an exhau~t line section indica-ted by the 3ame RefO No. 15.
. Inputs o~ controlled unidirectional hydraulic restric-tor valves 20, 21 are connected to the hydraulic chambers 5, 6 of the pneumohydraulic double-action inten~i~ier 2.
The co~trolled ~nidi~ectio~al hydraulic re~trictor valves 20, 21 also have outlet~ 20a9 21a and co~trol cham-L151~378 -- 8 ~-ber~ 20b~ 21b, the cham~er 20b oY the controlled unidirec-~lonal 4ydraulic restr~ctor valve 20 belng communi¢atad with the ~sctio~ 19 Or the hydraulic l~e 15~ ~h~le the chamber 20b of the hydraulic controlled u~îdirectional re~trictor valv~ 21 i8 communicated w~th the sectlon 18 of the hydra--ulic line 14.
~ he co~trolled unidirectional hydraulic re~trictor val~e~ 20, 21 are intended to provide alternate feeding o~
the hydraulic chamber~ 5~ 6 o~ the pneumo4ydraulic double-action intensifier 2 at a moment when each o~ the~e chambers 5, 6 i8 altern~tely connected to ~he exhau~t sectio~ 18 or 19 of the hydraulic line 15~ respectively.
According to the pre~ent invention, the pneumohydraulia pumping ~tation contalns a pneumohydraulic accumulator 22 provided to supply under pre8sure wor~ing fluid to the ~ctu-ati~g hydraulic motor 1 at the moment corre~pondin~ to re-ersal o~ the pneumohydraulic double-a¢tion inten~ifier 2.
construction ~he pneumohydraulic accumulator 22 i8 of any known ~uitable ~na i~ connected to the hydraulic pressure line 14 via a co~trolled unidirectional hydraulic restrictor valve 23 and a h~drhulic reduction valve 24 both o~ any known suita-ble con~truction.
An inlet 23a of the controlled unidirectional 4ydraulic restrictor valve 23 i8 connected to an outlet of the pneumo-hydraulic accumulator 22, wherea~ the outlet thereof i8 con-ne¢ted to the inlet o~ the hydraulic redu¢tion valve 24 hav-ing any k~own coD~truction.
g78 The co~trolled unidriectional hydraulic restrictor v~lve 23 co~tai~ a control chamber 23b.
~ he co~trol chamber ~3b of the controlled unid~recti-onal hydraulic restrictor val~e 23 i9 communicated wlth the outlet of a pneumatic flow dividi~g OR valve 25 al80 having aDy known construction.
~ he pneumohydraulic double-action intensifier 2 con-tain~ two pneu~atic limit ~witches 26, 27 of a~y known suitabla constructio~ who~e outlets 26a~ 27a are communica-ted with th~ control chamber~ 8~ 9 of the pneumatic power directional co~trol valve 7 and with inlets of the pneuma-tic flow dividing OR valve 25.
The pneumohydraulic double-action intensi~ier 2 con-tains two rods 2a, 2b intended for actuation o~ pneumatic limit switches 260 27. Inlet~ 26b, 27b of the pneumatic limit switche~ 26 a~d 27 are commu~icated via a pneumatic reducer 28 having any kuown construction with a compen~atin~
vessel 29.
~ he compenaatin~ ve~sel 29 is intended to balance a dif-ference in volumes o~ the rod chamber a~d the pi~ton chamber of the actuatin4 hydraulic motor 1 in reciprocating motion thereo~ and in alternate feedi~g of the hydraulic chambers 5~ 6 o~ the pneumohydraulic double-action i~ensi~ier 2 at discharge a3 well a8 to compensate leak~ in the hydraulic exhaust line 15 o~ the pneumohydraulic pumpi~g station.
~ he pneumohydraulic pumping ~tation also contain3 a ~ 97 8 -- 10 ~ , pneumohydraulic unidir~ctional inten3ifier 30 of any known ~wltable construction whlch compri~es a pneu~atic piston cha~ber 30a, a pneuma~ic rod chamber 30b a~d a hydraulic ~hamber 30c. The pneumohydraulic u~idirectional inten~ifier 30 serve~ to feed working fluid into the hydraulic chamber of the p~eumohydraulic accumulator 22 after it~ discharge.
~ e hydraulic chamber 30c o~ the pneumohydraulic uni-directional intensifier 30 is communicated ~hrough a hydra-ulic unidirectional restrictor valve 31 with the p~eumo-hydraulic accumulator 22 and through a hydraulic unidirec-tional re~trictor val~e 32 with the compen~ating vessel 29.
~ he pneumohydraulic unidirectional i~tensifier 30 has a pneumatic limit switch 33 whose inlet is communicated with the ~ource 11 of compre~sed ga~. ~he pneumohydraulic unidi-rectional i~tensi~ier 30 compri~e~ a rod 30d inte~ded for actuating a limit switch 33.
The pneumohydrauli~ pumping station according to the present invention co~tain~ a pneumatic ~our-way two-po~i-tion control directional valve 34 of any known suitable con~truction which has one control chamber 34a being com-municated via another ~low dividing OR valve 35 with out-let~ 26a, 27a o~ the pneumatic limit 3witches 26, 27 of the pneumatic double-action intensifier 2~
Another control chamber 34b of the pneumatic ~our-way two-position co~trol directional valve 34 is communicated with the outlet of the pneumatic limit switch 33.
7~
-- 11 ~
~ he pneumatic pi~to~ chamber 30a o~ the pneumohydraulic unidirectlonal inten~ifier 30 i~ communicated~ via a time relay 36 a~a a pneumatic unidirectional re~trictor valve 37 both o~ an~ k~own con~truction, connected in parallel with outlets of the four-way two-position control directional valve 34. The pneumatic rod chamber 30b of the pneumohydra-ulic unidirectional intensifier 3~ i8 directly communicated with outlets of this pneu~atic four-wa~ two-position control directional valve 3~. An inlet of the ~our-~a~ two-po3itio~
control directional valve 3~ is communicated with the 80UXC0 11 o~ compre~ed gas~
In thi~ embodiment the pneumohydraulic unidirectio~al intensifier 30 is cho~en ~o that i~tensification factor thereof should be greater tha~ that o* the pneumohydraulic double-actio~ intensifier 2~ thereby providing pressure i~
the pneumohydrauli~ pumping statio~ to be maintained on a level being not lower than the value of pressure o~ the working fluid aupplied from the pneumohydraulic double-ac-tion intensi~ier 2.
~ he pneumohydraulic pumping station according to the pr~sent invention operates a~ follow~.
Upon putting the pneumoh~draulic pumping station into operation, a plston o~ the pneumohydraulic double-action inten~i~ier 2 shift~ to this or that ~ide. Working fluid from the h~draulic chamber 5 or 6 is delivered~ via the hydraulic unidirectional restrictor valve 17a or 17b of the 1~19~8 bridge 17 of the hydraulic unidirectional r~strictor valve~, i~to the hydraulic pxe~ure line 14 and ~urther ~ia the ~ix-wa~ three-po~ition directional co~trol valve 16 to the actuati~g hydraulic motor 1.
Bei~g di~charged, the working fluid i8 fed via the h~draulic six-way three positio~ directional control valve 16 a~d, ~lternatel~, Yia the hydraulic unidirectio~al res-trictor val~e~ 17d, 17c of the bridge 17 of the hydraulic unidire¢tional restrictor valves, into an appropri~te hydraulic chamber 5 or 6 of the p~eumohydraulic double-ac-tion Lnt~n~ifier 2.
A di~ference in volumes of working fluid delivered into the hydraulic pres~ure line 14 and discharged from the hyd-raulic exhau~t line 15 iB balanced by mean~ of the compen~a-ting ve~sel 29 via the controlled unidir~ctional hydraulic restrictor valvcs 20~ 21, ~hile some excessive pressure i8 mai~tained b~ the pneumatic reducer 28 i~ the compensatiu~
ve~sel 29.
Wi~h the piston of the pneumohydraulic double-actio~
inten~i~ier approaching one of the end position~, this or that pneumatic limit switch 26 or 27 i8 actuated, thereby causin4 switch-over of the pneumatic power directional con~rol valve 7 a~d therefore reversal of the pneumoh~dra-ulic doubleaction i~tensi~ier 2. In order to compe~sate the drop (i.e. the temporary absence) of pres~ure and ~low in the hydraulic pressure li~e 14 during the rever~al of the ~151~7B
p~bumohydxaulic double-actio~ inten~iiier 2, a pneu~atic ~ignal ~rom the control chamber of the controlled u~idirec-tional hydraulic restrictor ~alve 23 having arrived earlier from the outlet~ 26a or 27a o~ the appropriate p~eumatic li-mit ~witch 26 or 27 drop~, the controlled u~idirectional hydraulic restrictor ~alve 23 is closed, and the p~eumohyd-raulic unidirectional intensifier 30 intitiating operation under preæsure o~ compre~sed air ¢oming through the four-way two-position ¢ontrol directional valve 34, the time relay 36 into the pneumatic piæto~ chamber 30a thereof starts ¢harging the pneumohydraulic accumulator 22, thus pxepari~g it to the ne~t reversal c~cle of the pneumohydraulic double-action intensifier 2.
Upon completing operation o~ the pneumohydraulic unidi-rectional inten~ifier 30 and a~ter reversal of the pneumo-hydraulic double-action intenæifier 2 has been end~d, the pneumatic limit ~itch 33 i~ actuated, thu~ reversing the pneumatic four-way two-po~ition control directional valve 34 and, therefore~ retuning the piston o~ the pneumohydraulic unidirectional intenæi~ier 30 into the initial ~tate thereof.
~his cause~ the hydraulic chamber 30c of the pneumohydraulic unidirectional inten~ifier 30 to be ~e.d from the comp.en~a-ting ves~el 29 through the h~draulic unidirectional reætric-tor 32. Therewith air i~ being bled via the pneumatic unidi-rectional re~trictor ~alve 37 from the pneumati¢ pi~ton chamber 30a of the p~eumohydraulic unidirectional inten~i-197~3 ~ier 30. '-'he intellsificatio~ factor of the pneumohydraulic unidirectional inte~sifier 30 is ~omewhat greater than that of the pIloumohydraulic double-action i~ten~i~ier 2~ thereby providing ~omo exces~ pres~ure f or c~ar~;ing the p:Eleumoh;~-draulic aceumulator 22.
Thus 9 such a control arrangeme~ impleme~ts a clQsed-loop hydraulic drive, wherein the source of working fluid under pressure, iOe. the pneumohydraulic double-action inten~ifier 2, operates independently from the operating cycle.
Pressure drop in the hydraulic pressure line 14 due to reversal of the pneumohydraulic double-action intensi-fier 2 causes a~ appropriate portion of the working fluid to be d~livered to said hydraulic line 14 by the pneumo-hydraulic accumulator 22~ because a control ~ig~ imul-taneou~ly arrives ~rom the pneumatic limit swi~ch 26 or 27 to the co~rol chamber 8 or 9 of the pneumatic power direc-tional control v~lve 7 and via the pneumatic ~low dividing OR valve 25 to the control chamber 23b of the controlled unidirectional hydraulic restrictor valve 23, which opene~
and the working ~luid is dischar~ed ~rom the hydraulic accumulator 22 via the hydraulic reduction valve 24 adjus-ted to the worklng pressure in the hydraulic pre~sure line 14~
A pneumatic signal simultaueously pa~ses from the pneumatic limit switch 26 or 27 via the another flow divi-llS197~3 ding OR valve 35 to the le~tmost pneumatic chamber 3~a of the pneumatic ~our-way two-position control dire¢tio~al valve 34 (as see;~ in the drawing) ~witching it over to the rightmost position there~f (as seen i~ the dxawing).
~hi~ causes compres~ed air to feed the pneumatic chamber 30a o~ the pneumoh~draulic unidirectional intensifier 30 with a time del~y determined by adjustment of the time re-lay 36.
~ his time delay should slightly exceed the reversal time of the pn~umatic double-action inten~ifier 2. Upon completion o~ revorsal o~ the p~aumatic double-action in-tensi~ier 2, the pneumatic limit switch 26 or 27 is dis -enga~ed.
A pilot model o~ the pneumohydraulic station embodyi~
the present invention has pas~ed comprehensive tests who~e results coniirmed the ~easibility of the continuou~ opera-ting mode of the actuating hydraulic engine accompanied by reliable operation thereof.
the pneumohydraulic double-action i~te~sifier. Another pair of diagonally oppo~ite corner~ of this bridge are communica-ted via the hydraulic pressure and exhaust li~es with the in-let and the outlet of a hydraulic ~ix-way three-position di-re¢tional control ~alve bain~ ad~pted to provide the required operating cycle of the actuatinK hydraulic motor, ~ his hydraulic con~rol equipment al~o compri~es control-led unidirectional hydraulic restrictor valves intended to provide al~ernati~g feed of the 4~draulic chamber~ of the pneumohydraul~c double-action inten~ifier with a capability of compen~ati~g a voluminar difference of working fluid dis-charged by turns ~rom the rod chamber and the pi3ton ehamber of the aetuating h~draullc motor. ~hese eontrolled unidireeti-onal hydraulic restrietor valves are eon~eeted to the k~dra-ulic ehamber~ o~ the pneumohydraulie double-action i~tensi~ier and to the bridge o~ hydraulie unidireetion~l restrietor valve~.
Depend~ng on pre~ure in pneu~atie chambers o~ the double-action intensi~ier~ each hydraulic chamber thereo~ periodical-ly function~ a~ pres~ure chamber and exhaust chamber, while sections of the hydraulie lin9s co~necting these hydraulie chamber~ ~ith the bridge o~ hydraulic unidirectional restric-tor valves operate by turns as seetions of pre~sure line~ or e~haust lines.
~ he hydraulic uni~irectio~al re~trictor ~alve~ o~ ~aid brîd~e are further connected through permane~t pressure and exhaust sectio~s o~ hydraulic line3 and through the hydraulic six-way three position directional control valve to the hyd-raulic chambers o~ the actuatin~ hydraulic motor.
~ he knowu pneumoh~draulic pumpin~ station does not provide for a continuous mode o~ operation of the actuating hydraulic motor.
~ his i~ due to the fact that while reversing the pneumo-hydraulic double-action inte~si~ier~ working ~lui~ under pressure is not supplied to the actuating hydraulic motor, since it takes some time to bleed compressed air from one chamber to another of the p~umohydraulic double-~ction inten-si~ier during which no pressure i~ created in the hyd~aulic chamber of the pneumohydraulic double-action intensifier.
~ his restricts to a considerable degree the applicability of the known prior-art ~tation. Up-to-date technological equipment o~tcn requires the continuous operation mode to be reali~ed.
It is there~ore the principle object o~ the present in-vention to provide a pneumohydraulic pumping station enabling the continuous operatinæ mode o~ the actuating hydraulic motor.
It is another object of the present invention to provid~
a pneumohydraulic pumping station ha~i~g high operational re-liability whe~ rever~ing the pneumohydraulic double-action inte~sifier.
~ hese object~ are attainad in a pheumohydraulic pump-ing station comprisi~g a pneumohydraulic double-actio~ inte~-sifier whose pneumatic chamber~ are communicated with outputs of a pneu~atic power directional co~trol valve also having co~trol chambers and an inlet being in commu~ication with a ~ource of compre~sed air, hydraulic chambers o~ the pneumohyd-raulic double-actio~ ntensifier bei~g communicated through a pressure line and an exhaust line having hydraulic control equipment with an actuating hydraulic motor, which,according to the present invention, comprises a pneumohydraulic accumu-lator connected via a controlled unidirectional h~draulic restrictor valve and via a hydraulic reduction valve to the pres~ure line, whereas the pneumohydraulic double-action in-tensifier has pneumatic limit switches whose outlets are com-municated with control chambers of the pneumatic power direc-tional control valve and with inlets of a pneumatic flow dividing OR valve having an outlet being communicated with a con~rol chamber of the controlled unidirectional 4ydraulic restrictor valve of the pneu~o4ydraulic accumulator~ while in-let~ of these pneumatic limit switches being communicated via a p~cumatic reducer with a compen~ating vessel, and are also attained in that the pneumohydraulic pumpiLg statio~ includes a pneumo4ydrau~ic unidirectional intan~ifier with a pneumatic limit switch whose inlet i8 communicated with a source of comprRssed gas, a pneumatic piston chamber of the pneumohyd-raulic unidirectional intensifier being communicated throu~h a time relay and a pneumatic unidirectional restrictor valve bei~g connected in parallel thereto and a pneumatic rod cham-ber thereof directly with outlet~ o~ a p~eumatic four-way two-po~ition directional control valve who~e inlet is communica-ted wlth th~ source of compressed ga~, one control chamber of the pneumatic four-way two-position directional control valve bei~g communicated via another p~eumatic ~low-dividing OR valve with outlet~ o~ p~eumatic limit switche~ o~ the p~eumohydraulic double-action i~tensifier, wherea~ another control chamber of the pneumatic four-way two-po~ition direc-tional control valve beiDg communicated with an outlet of the pneumatic limit switch of the pneumohydraulic unidirectional inten~ifier whose hydraulic chamber i8 communicated via hyd-raulic unidirectional restric~or valve with the compensating vessel .
It is expendient that the pneumohydraulic unidirectional intensi~ier i~ chosen ~uch that the intensi~ c~tio~ factor thereof be greater than that of the p~eumohydraulic double action intensifier.
~ he pneumohydraulic pumpin~ ~tation, according to the present inve~tion, provides ~or the continuous operation mode of the actuati~g hydraulic motor, ~ince the pneumohydraulic accumulator i~stalled in the pressure line i~ combination with appropriate control equipment excludes a po~ ility o~
drops (the ~sence) of pressure in working fluid at the outlet of the pneumohydraulic pQmping ~tatio~.
~ he pneumohydraulic pumping station eliminates spurious signals in a pneumatic control system inasnuch as all eleme~ts 37l3 thereo~` are actuated in sequence. The propDsed pneumohydraulic pumping station ~eatures a su:fficiently simple cDnstructi~n, is reliable ir~ ~peratiDn and has 1DW PDWer C~nSUmPtiDn.
Given hereinbelow is a detailed description of a spacific e~emplary embodiment of the present invention to be read in conjunctiDn witb the attached drawin~, wherein a pneumohydraulic diagram oi` the pneumobydraulic pumping sta-tion according tc ~his invention is repressnted.
~ he proposed pneumohydraulic pumping station is inten-ded for supplying under pressure working fluid to the actu-ating hydraulic motor 1.
The pneumohydraulic pumping station comprises a pneumo-hgdraulic double-action intensi~ier 2 of any known suitable construction having pneumatic chambers 3 and 4 and hydrau-lic chambers 5 and 6. ~he pneumohydraulic doubla-actiDn in-tensifier 2 is provided with a pneumatic power directional cont-rol valve 7 also of any known suitable construction and having control chambers 8 and 9. An inlet 10 of the pneumatic power directional control valve 7 i~ communicated with a source 11 o~ compressed ga~, while outlets 12, 13 of thc pneumatic power directional control valve 7 are communicated with pneumatic chambers 3, 4 of the pneumohydraulic double action inten~ifi-er 2.
The pncumohydraulic double-action intensifier 2 bas out-lets 5a, 6a of the hydraulic chambers 5, 6 bein~ connected via hydraulic pressure line 14 and hydraulic exhaust line 15 tD inlets DP a hydraulic s$x-way three-po~ition directional cvntrol valve 16 o~ any know~ initable construction whose outlet~ are communicated with appropriate chamber~ of the artuatin~ hydraulic mo-tor 1.
~ ydraulic lines 14, 15 include hydraulic co~trol equip~e~t compri~ing a bridge 17 of hydraulic unid;recti-onal restrictor valve~ 17a, 17b, 17c~ 17d of any known con~truction. Diagonally opposite pair of cornsrs in the bridge 17 o~ hydraulic unidirectional restrictor valves are ¢onnected to output~ 5a, 6a o~ the pneumohydraulic double-action inten~ifier 2.
Sections 18, 19 o~ the hydraulic line~ 14~ 15 connec-ti~g the outlets 5a, 6a of the pneumohydraulic double~ac-tion intensifier 2 to the bridge 17, depending on pressures in the hydraulic chambers 5, 6, alte~ately act either as pressure section~ or as exhaust sections, while a~y other section of the h~draulic lines 14, 15 connecting the bridge 17 of hydraullc uniairectional restrictor valves to the hyd-raulic 8i~-way three-position directional control valve 16 acts permanently as a pressure line section indicated by the same Ref. No. 14 or as an exhau~t line section indica-ted by the 3ame RefO No. 15.
. Inputs o~ controlled unidirectional hydraulic restric-tor valves 20, 21 are connected to the hydraulic chambers 5, 6 of the pneumohydraulic double-action inten~i~ier 2.
The co~trolled ~nidi~ectio~al hydraulic re~trictor valves 20, 21 also have outlet~ 20a9 21a and co~trol cham-L151~378 -- 8 ~-ber~ 20b~ 21b, the cham~er 20b oY the controlled unidirec-~lonal 4ydraulic restr~ctor valve 20 belng communi¢atad with the ~sctio~ 19 Or the hydraulic l~e 15~ ~h~le the chamber 20b of the hydraulic controlled u~îdirectional re~trictor valv~ 21 i8 communicated w~th the sectlon 18 of the hydra--ulic line 14.
~ he co~trolled unidirectional hydraulic re~trictor val~e~ 20, 21 are intended to provide alternate feeding o~
the hydraulic chamber~ 5~ 6 o~ the pneumo4ydraulic double-action intensifier 2 at a moment when each o~ the~e chambers 5, 6 i8 altern~tely connected to ~he exhau~t sectio~ 18 or 19 of the hydraulic line 15~ respectively.
According to the pre~ent invention, the pneumohydraulia pumping ~tation contalns a pneumohydraulic accumulator 22 provided to supply under pre8sure wor~ing fluid to the ~ctu-ati~g hydraulic motor 1 at the moment corre~pondin~ to re-ersal o~ the pneumohydraulic double-a¢tion inten~ifier 2.
construction ~he pneumohydraulic accumulator 22 i8 of any known ~uitable ~na i~ connected to the hydraulic pressure line 14 via a co~trolled unidirectional hydraulic restrictor valve 23 and a h~drhulic reduction valve 24 both o~ any known suita-ble con~truction.
An inlet 23a of the controlled unidirectional 4ydraulic restrictor valve 23 i8 connected to an outlet of the pneumo-hydraulic accumulator 22, wherea~ the outlet thereof i8 con-ne¢ted to the inlet o~ the hydraulic redu¢tion valve 24 hav-ing any k~own coD~truction.
g78 The co~trolled unidriectional hydraulic restrictor v~lve 23 co~tai~ a control chamber 23b.
~ he co~trol chamber ~3b of the controlled unid~recti-onal hydraulic restrictor val~e 23 i9 communicated wlth the outlet of a pneumatic flow dividi~g OR valve 25 al80 having aDy known construction.
~ he pneumohydraulic double-action intensifier 2 con-tain~ two pneu~atic limit ~witches 26, 27 of a~y known suitabla constructio~ who~e outlets 26a~ 27a are communica-ted with th~ control chamber~ 8~ 9 of the pneumatic power directional co~trol valve 7 and with inlets of the pneuma-tic flow dividing OR valve 25.
The pneumohydraulic double-action intensi~ier 2 con-tains two rods 2a, 2b intended for actuation o~ pneumatic limit switches 260 27. Inlet~ 26b, 27b of the pneumatic limit switche~ 26 a~d 27 are commu~icated via a pneumatic reducer 28 having any kuown construction with a compen~atin~
vessel 29.
~ he compenaatin~ ve~sel 29 is intended to balance a dif-ference in volumes o~ the rod chamber a~d the pi~ton chamber of the actuatin4 hydraulic motor 1 in reciprocating motion thereo~ and in alternate feedi~g of the hydraulic chambers 5~ 6 o~ the pneumohydraulic double-action i~ensi~ier 2 at discharge a3 well a8 to compensate leak~ in the hydraulic exhaust line 15 o~ the pneumohydraulic pumpi~g station.
~ he pneumohydraulic pumping ~tation also contain3 a ~ 97 8 -- 10 ~ , pneumohydraulic unidir~ctional inten3ifier 30 of any known ~wltable construction whlch compri~es a pneu~atic piston cha~ber 30a, a pneuma~ic rod chamber 30b a~d a hydraulic ~hamber 30c. The pneumohydraulic u~idirectional inten~ifier 30 serve~ to feed working fluid into the hydraulic chamber of the p~eumohydraulic accumulator 22 after it~ discharge.
~ e hydraulic chamber 30c o~ the pneumohydraulic uni-directional intensifier 30 is communicated ~hrough a hydra-ulic unidirectional restrictor valve 31 with the p~eumo-hydraulic accumulator 22 and through a hydraulic unidirec-tional re~trictor val~e 32 with the compen~ating vessel 29.
~ he pneumohydraulic unidirectional i~tensifier 30 has a pneumatic limit switch 33 whose inlet is communicated with the ~ource 11 of compre~sed ga~. ~he pneumohydraulic unidi-rectional i~tensi~ier 30 compri~e~ a rod 30d inte~ded for actuating a limit switch 33.
The pneumohydrauli~ pumping station according to the present invention co~tain~ a pneumatic ~our-way two-po~i-tion control directional valve 34 of any known suitable con~truction which has one control chamber 34a being com-municated via another ~low dividing OR valve 35 with out-let~ 26a, 27a o~ the pneumatic limit 3witches 26, 27 of the pneumatic double-action intensifier 2~
Another control chamber 34b of the pneumatic ~our-way two-position co~trol directional valve 34 is communicated with the outlet of the pneumatic limit switch 33.
7~
-- 11 ~
~ he pneumatic pi~to~ chamber 30a o~ the pneumohydraulic unidirectlonal inten~ifier 30 i~ communicated~ via a time relay 36 a~a a pneumatic unidirectional re~trictor valve 37 both o~ an~ k~own con~truction, connected in parallel with outlets of the four-way two-position control directional valve 34. The pneumatic rod chamber 30b of the pneumohydra-ulic unidirectional intensifier 3~ i8 directly communicated with outlets of this pneu~atic four-wa~ two-position control directional valve 3~. An inlet of the ~our-~a~ two-po3itio~
control directional valve 3~ is communicated with the 80UXC0 11 o~ compre~ed gas~
In thi~ embodiment the pneumohydraulic unidirectio~al intensifier 30 is cho~en ~o that i~tensification factor thereof should be greater tha~ that o* the pneumohydraulic double-actio~ intensifier 2~ thereby providing pressure i~
the pneumohydrauli~ pumping statio~ to be maintained on a level being not lower than the value of pressure o~ the working fluid aupplied from the pneumohydraulic double-ac-tion intensi~ier 2.
~ he pneumohydraulic pumping station according to the pr~sent invention operates a~ follow~.
Upon putting the pneumoh~draulic pumping station into operation, a plston o~ the pneumohydraulic double-action inten~i~ier 2 shift~ to this or that ~ide. Working fluid from the h~draulic chamber 5 or 6 is delivered~ via the hydraulic unidirectional restrictor valve 17a or 17b of the 1~19~8 bridge 17 of the hydraulic unidirectional r~strictor valve~, i~to the hydraulic pxe~ure line 14 and ~urther ~ia the ~ix-wa~ three-po~ition directional co~trol valve 16 to the actuati~g hydraulic motor 1.
Bei~g di~charged, the working fluid i8 fed via the h~draulic six-way three positio~ directional control valve 16 a~d, ~lternatel~, Yia the hydraulic unidirectio~al res-trictor val~e~ 17d, 17c of the bridge 17 of the hydraulic unidire¢tional restrictor valves, into an appropri~te hydraulic chamber 5 or 6 of the p~eumohydraulic double-ac-tion Lnt~n~ifier 2.
A di~ference in volumes of working fluid delivered into the hydraulic pres~ure line 14 and discharged from the hyd-raulic exhau~t line 15 iB balanced by mean~ of the compen~a-ting ve~sel 29 via the controlled unidir~ctional hydraulic restrictor valvcs 20~ 21, ~hile some excessive pressure i8 mai~tained b~ the pneumatic reducer 28 i~ the compensatiu~
ve~sel 29.
Wi~h the piston of the pneumohydraulic double-actio~
inten~i~ier approaching one of the end position~, this or that pneumatic limit switch 26 or 27 i8 actuated, thereby causin4 switch-over of the pneumatic power directional con~rol valve 7 a~d therefore reversal of the pneumoh~dra-ulic doubleaction i~tensi~ier 2. In order to compe~sate the drop (i.e. the temporary absence) of pres~ure and ~low in the hydraulic pressure li~e 14 during the rever~al of the ~151~7B
p~bumohydxaulic double-actio~ inten~iiier 2, a pneu~atic ~ignal ~rom the control chamber of the controlled u~idirec-tional hydraulic restrictor ~alve 23 having arrived earlier from the outlet~ 26a or 27a o~ the appropriate p~eumatic li-mit ~witch 26 or 27 drop~, the controlled u~idirectional hydraulic restrictor ~alve 23 is closed, and the p~eumohyd-raulic unidirectional intensifier 30 intitiating operation under preæsure o~ compre~sed air ¢oming through the four-way two-position ¢ontrol directional valve 34, the time relay 36 into the pneumatic piæto~ chamber 30a thereof starts ¢harging the pneumohydraulic accumulator 22, thus pxepari~g it to the ne~t reversal c~cle of the pneumohydraulic double-action intensifier 2.
Upon completing operation o~ the pneumohydraulic unidi-rectional inten~ifier 30 and a~ter reversal of the pneumo-hydraulic double-action intenæifier 2 has been end~d, the pneumatic limit ~itch 33 i~ actuated, thu~ reversing the pneumatic four-way two-po~ition control directional valve 34 and, therefore~ retuning the piston o~ the pneumohydraulic unidirectional intenæi~ier 30 into the initial ~tate thereof.
~his cause~ the hydraulic chamber 30c of the pneumohydraulic unidirectional inten~ifier 30 to be ~e.d from the comp.en~a-ting ves~el 29 through the h~draulic unidirectional reætric-tor 32. Therewith air i~ being bled via the pneumatic unidi-rectional re~trictor ~alve 37 from the pneumati¢ pi~ton chamber 30a of the p~eumohydraulic unidirectional inten~i-197~3 ~ier 30. '-'he intellsificatio~ factor of the pneumohydraulic unidirectional inte~sifier 30 is ~omewhat greater than that of the pIloumohydraulic double-action i~ten~i~ier 2~ thereby providing ~omo exces~ pres~ure f or c~ar~;ing the p:Eleumoh;~-draulic aceumulator 22.
Thus 9 such a control arrangeme~ impleme~ts a clQsed-loop hydraulic drive, wherein the source of working fluid under pressure, iOe. the pneumohydraulic double-action inten~ifier 2, operates independently from the operating cycle.
Pressure drop in the hydraulic pressure line 14 due to reversal of the pneumohydraulic double-action intensi-fier 2 causes a~ appropriate portion of the working fluid to be d~livered to said hydraulic line 14 by the pneumo-hydraulic accumulator 22~ because a control ~ig~ imul-taneou~ly arrives ~rom the pneumatic limit swi~ch 26 or 27 to the co~rol chamber 8 or 9 of the pneumatic power direc-tional control v~lve 7 and via the pneumatic ~low dividing OR valve 25 to the control chamber 23b of the controlled unidirectional hydraulic restrictor valve 23, which opene~
and the working ~luid is dischar~ed ~rom the hydraulic accumulator 22 via the hydraulic reduction valve 24 adjus-ted to the worklng pressure in the hydraulic pre~sure line 14~
A pneumatic signal simultaueously pa~ses from the pneumatic limit switch 26 or 27 via the another flow divi-llS197~3 ding OR valve 35 to the le~tmost pneumatic chamber 3~a of the pneumatic ~our-way two-position control dire¢tio~al valve 34 (as see;~ in the drawing) ~witching it over to the rightmost position there~f (as seen i~ the dxawing).
~hi~ causes compres~ed air to feed the pneumatic chamber 30a o~ the pneumoh~draulic unidirectional intensifier 30 with a time del~y determined by adjustment of the time re-lay 36.
~ his time delay should slightly exceed the reversal time of the pn~umatic double-action inten~ifier 2. Upon completion o~ revorsal o~ the p~aumatic double-action in-tensi~ier 2, the pneumatic limit switch 26 or 27 is dis -enga~ed.
A pilot model o~ the pneumohydraulic station embodyi~
the present invention has pas~ed comprehensive tests who~e results coniirmed the ~easibility of the continuou~ opera-ting mode of the actuating hydraulic engine accompanied by reliable operation thereof.
Claims (2)
1. A penumohydraulic pumping station for an actuating hydraulic motor comprising a source of compressed air; a compensating vessel; a pneumohydraulic double-action inten-sifier having hydraulic chambers being communicated through a pressure line and an exhaust line with said actuating hydraulic motor; a pneumatic power directional control valve of said pneumohydraulic double-action intensifier having control chambers; said pneumatic power directional control valve having an inlet being communicated with said source of compressed air and outlets; said pneumohydraulic double-action intensifier having pneumatic chambers being communi-cated with the outlets of said pneumatic power directional control valve; a controlled unidirectional hydraulic res-trictor valve having a control chamber; a hydraulic reduc-tion valve; a pneumohydraulic accumulator connected via said controlled unidirectional hydraulic restrictor valve and via said hydraulic reduction valve to the pressure line of said actuating hydraulic motor; a pneumatic flow dividing "OR" valve having inlets and an outlet being com-municated with the control chamber of said controlled uni-directional hydraulic restrictor valve of said pneumo-hydraulic accumulator; pneumatic limit switches of said pneumohydraulic double-action intensifier having outlets being communicated with the control chambers of said pneuma-tic power directional control valve and with inlets of said pneumatic flow dividing "OR" valve; a pneumatic reducer;
said pneumatic limit switches of said pneumohydraulic double action intensifier having inlets being communicated through said pneumatic reducer with said compensating ves-sel and outlets; a pneumohydraulic unidirectional intensifier having a pneumatic piston chamber, a pneumatic rod chamber and a hydraulic chamber being communicated via the hydra-ulic unidirectional restrictor valve with said compensating vessel; a pneumatic limits switch of said pneumohydraulic unidirectional intensifier having an inlet being communica-ted with said source of compressed gas and outlet; a time relay; a pneumatic unidirectional restrictor valve; a pne-umatic four-way two-position directional control valve having an inlet being communicated with said source of com-pressed gas and outlets being directly communicated with the pneumatic rod chamber and with the pneumatic piston chamber of said pneumohydraulic unidirectional intensifier through said time relay and said pneumatic unidirectional restrictor valve being connected in parallel to this pneu-matic piston chamber; another pneumatic flow dividing OR
valve; said pneumatic fourway two-position directional control valve having one control chamber being communicated via said another flow dividing OR valve with outputs of said pneumatic limit switches of said pneumohydraulic double-action intensifier; said pneumatic four-way two-position directional control valve having another control chamber being communicated with the output of said pneumatic limit switch of said pneumohydraulic unidirec-tional intensifier.
said pneumatic limit switches of said pneumohydraulic double action intensifier having inlets being communicated through said pneumatic reducer with said compensating ves-sel and outlets; a pneumohydraulic unidirectional intensifier having a pneumatic piston chamber, a pneumatic rod chamber and a hydraulic chamber being communicated via the hydra-ulic unidirectional restrictor valve with said compensating vessel; a pneumatic limits switch of said pneumohydraulic unidirectional intensifier having an inlet being communica-ted with said source of compressed gas and outlet; a time relay; a pneumatic unidirectional restrictor valve; a pne-umatic four-way two-position directional control valve having an inlet being communicated with said source of com-pressed gas and outlets being directly communicated with the pneumatic rod chamber and with the pneumatic piston chamber of said pneumohydraulic unidirectional intensifier through said time relay and said pneumatic unidirectional restrictor valve being connected in parallel to this pneu-matic piston chamber; another pneumatic flow dividing OR
valve; said pneumatic fourway two-position directional control valve having one control chamber being communicated via said another flow dividing OR valve with outputs of said pneumatic limit switches of said pneumohydraulic double-action intensifier; said pneumatic four-way two-position directional control valve having another control chamber being communicated with the output of said pneumatic limit switch of said pneumohydraulic unidirec-tional intensifier.
2. A pneumohydraulic pumping station according to claim 1, in which said pneumohydraulic unidirectional intensifier is such that the intensification factor there-of is greater than that of said pneumohydraulic double-action intensifier.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SU1980/000056 WO1981002769A1 (en) | 1980-03-26 | 1980-03-26 | Pneumohydropumping installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151978A true CA1151978A (en) | 1983-08-16 |
Family
ID=21616599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000371680A Expired CA1151978A (en) | 1980-03-26 | 1981-02-25 | Pneumohydraulic pumping station |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS57500345A (en) |
| CA (1) | CA1151978A (en) |
| DE (1) | DE3050309C2 (en) |
| FR (1) | FR2504205B1 (en) |
| WO (1) | WO1981002769A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481603B (en) * | 2015-08-24 | 2018-04-10 | 晋中浩普液压设备有限公司 | Twin-tub super-pressure automatic reciprocating booster |
| CN110102784A (en) * | 2019-04-29 | 2019-08-09 | 陕西科技大学 | A kind of hydraulic control system of numerically controlled lathe tailstock and chuck |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH389407A (en) * | 1961-04-06 | 1965-03-15 | Maeder Werkzeugbau U Stanzerei | Delivery pump for a liquid aerosol propellant |
| DE1528583A1 (en) * | 1965-05-20 | 1970-01-29 | Stahl U Appbau Hans Leffer Gmb | Hydraulically or pneumatically continuously operated piston drive with reciprocating movement, especially double-acting pressure intensifier |
| DE1653474C3 (en) * | 1968-01-02 | 1974-10-31 | Paul Hammelmann Maschinenfabrik, 4740 Oelde | Device for generating press water of different pressure |
| US3650638A (en) * | 1969-12-19 | 1972-03-21 | Halliburton Co | Hydraulically powered pump having a precompression function |
| CA983348A (en) * | 1973-05-29 | 1976-02-10 | Endre A. Mayer | Dual single action ram intensifier |
| DE2334000A1 (en) * | 1973-07-04 | 1975-01-23 | Reinhard Kucharzyk | High pressure plunger type water pump - has oil loaded reservoir to give pulsation free output |
| FR2324899A1 (en) * | 1974-01-14 | 1977-04-15 | Poclain Sa | HYDRAULIC INSTALLATION ALLOWING ENERGY STORAGE AT LOW USING POWER |
| US3945207A (en) * | 1974-07-05 | 1976-03-23 | James Ervin Hyatt | Hydraulic propulsion system |
| DE2538870A1 (en) * | 1974-09-04 | 1976-04-01 | Mo Aviacionnyj I Im Sergo Ords | PNEUMATIC-HYDRAULIC PUMP SYSTEM |
| US4119113A (en) * | 1975-02-06 | 1978-10-10 | Extracorporeal Medical Systems, Inc. | Double-action proportioning pump |
| DE2618372A1 (en) * | 1976-04-27 | 1977-11-17 | Franz Walter | Gas to liq. pressure converter - has impulse valves actuated by piston movement switching connection of control bores with pressure or ventilated chamber |
| DE2844792A1 (en) * | 1978-10-13 | 1980-04-17 | Exnii Kuznetschno Pressovogo M | Drive for hydraulic screw press - has hydropneumatic accumulator and distributor providing alternate connection via non-return valves |
-
1980
- 1980-03-26 DE DE3050309T patent/DE3050309C2/en not_active Expired
- 1980-03-26 WO PCT/SU1980/000056 patent/WO1981002769A1/en not_active Ceased
- 1980-03-26 JP JP55501139A patent/JPS57500345A/ja active Pending
-
1981
- 1981-02-25 CA CA000371680A patent/CA1151978A/en not_active Expired
- 1981-04-21 FR FR8107922A patent/FR2504205B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2504205A1 (en) | 1982-10-22 |
| JPS57500345A (en) | 1982-02-25 |
| DE3050309C2 (en) | 1985-12-12 |
| DE3050309T1 (en) | 1982-04-15 |
| FR2504205B1 (en) | 1985-10-04 |
| WO1981002769A1 (en) | 1981-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4490096A (en) | Pump system for liquid/solid materials with balanced output | |
| US4496294A (en) | Diaphragm pump | |
| EP0708244B1 (en) | Double diaphragm pump | |
| KR100704219B1 (en) | Hydraulic Drive Control | |
| EP0900889A3 (en) | Hydraulic circuit system for hydraulic working machine | |
| CN102947593A (en) | Double-diaphragm pump | |
| KR100196713B1 (en) | Drive circuit for fluid operated actuator | |
| CA1151978A (en) | Pneumohydraulic pumping station | |
| EP0094395A1 (en) | An elevating apparatus. | |
| US8186972B1 (en) | Multi-stage expansible chamber pneumatic system | |
| CA1259522A (en) | Pumping arrangements | |
| GB1379566A (en) | Vacuum sewage system | |
| US5639218A (en) | High pressure water pump system having a reserve booster pump | |
| US5435228A (en) | Pneumatic transformer | |
| US4437309A (en) | Pneumatic-hydraulic system for hydraulic actuator | |
| AU558958B2 (en) | A load sensing hydraulic system | |
| WO1992009811A1 (en) | Stream separating or combining change-over system of a plurality of pumps in load sensing system | |
| US5353683A (en) | Pneumatic transformer | |
| US3490378A (en) | Booster pump-equipped hydraulic pressure system | |
| CA1140836A (en) | Pneumohydraulic pumping station | |
| US635667A (en) | Unloading means for air-compressors. | |
| CA1152860A (en) | Pneumohydraulic pumping plant | |
| SU1587211A1 (en) | Hydraulic system of power support unit | |
| US2360060A (en) | Hydraulic press | |
| US756993A (en) | Valve mechanism for pumps. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |