WO2011127842A1 - 混凝土泵用分配阀及混凝土泵 - Google Patents

混凝土泵用分配阀及混凝土泵 Download PDF

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Publication number
WO2011127842A1
WO2011127842A1 PCT/CN2011/072962 CN2011072962W WO2011127842A1 WO 2011127842 A1 WO2011127842 A1 WO 2011127842A1 CN 2011072962 W CN2011072962 W CN 2011072962W WO 2011127842 A1 WO2011127842 A1 WO 2011127842A1
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WO
WIPO (PCT)
Prior art keywords
pipe section
valve
concrete pump
distribution valve
pipe
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.)
Ceased
Application number
PCT/CN2011/072962
Other languages
English (en)
French (fr)
Inventor
易小刚
朱红
李良荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Sany Intelligent Control Equipment Co Ltd
Sany Heavy Industry Co Ltd
Original Assignee
Hunan Sany Intelligent Control Equipment Co Ltd
Sany Heavy Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Sany Intelligent Control Equipment Co Ltd, Sany Heavy Industry Co Ltd filed Critical Hunan Sany Intelligent Control Equipment Co Ltd
Priority to EP11768453.0A priority Critical patent/EP2559901A4/en
Priority to US13/641,335 priority patent/US9188112B2/en
Publication of WO2011127842A1 publication Critical patent/WO2011127842A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F04B15/023—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0034—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/008—Piston machines or pumps characterised by having positively-driven valving the distribution being realised by moving the cylinder itself, e.g. by sliding or swinging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the present invention relates to a mixed soil pump technology, and more particularly to a distribution valve for a mixed soil pump, and to a mixed pump having the distribution valve.
  • the technical mixed soil pump is one of the widely used mixed earthmoving machines.
  • the mixed soil pump generally includes a hopper, a conveying cylinder, a distribution valve and a conveying pipe.
  • the hopper is used for storing concrete mud, and the conveying cylinder is driven by a hydraulic cylinder.
  • the distribution valve is configured to communicate the delivery cylinder with the hopper in a predetermined first time, so that the delivery cylinder absorbs the material and inhales an appropriate amount of concrete slurry; and the delivery cylinder is connected to the delivery tube for a predetermined second time. , so that the pumping material is pumped, and the sucked concrete mud is pressed into the conveying pipe, so that the concrete mud reaches the predetermined position under the pressure of the conveying cylinder.
  • the distribution valve is mixed One of the key components of the concrete pump.
  • the mixing valve of the soil pump mainly includes: ram type distribution valve, S type distribution valve, C type distribution valve and skirt valve.
  • the ram type distribution valve mainly passes through the distribution valve.
  • the conveying cylinder Up and down movement of the two rams, in a predetermined first time, the conveying cylinder is connected with the output port of the hopper, so that the conveying cylinder sucks, and the conveying rainbow passes through a Y-shaped tube in a predetermined second time. It communicates with the conveying pipe to pump the conveying cylinder.
  • the advantages of the ram type distribution valve are: better suction performance and higher pumping efficiency; especially for coarse aggregate concrete, the above advantages are more obvious; Therefore, since the position between the conveying cylinder and the conveying pipe is realized by switching the position of the ram, the pressure of the concrete slurry in the conveying pipe is limited by the fitting position around the ram, and the ram type distribution valve cannot meet the needs of the high pressure pumping concrete slurry.
  • FIG. 1 is a structural view of a prior art S-type dispensing valve.
  • the hopper 110 is shown by a two-dot chain line.
  • the S-type dispensing valve includes an S-shaped elbow 120, S-bend Tube 120 Installed in the hopper 110, the input end thereof can be laterally oscillated in the hopper 110 under the driving of the driving mechanism 130 to sequentially connect the two conveying cylinders 140; the output end thereof communicates with the conveying pipe located outside the hopper 110.
  • the cylinder 140 sequentially pumps the concrete slurry to the conveying pipe through the S-shaped elbow 120.
  • the superiority of the S-type distribution valve The point is: The high pressure generated when pumping the pump is mainly applied to the inner wall of the S-shaped elbow.
  • the entire S-shaped elbow with a circular cross section is evenly subjected to tensile force.
  • the S-type distribution valve can withstand large pressure and its working pressure. It can reach 16Mpa, or even larger; therefore, with the S-type distribution valve, the concrete pump can pump concrete mud a little further distance, or pump it to a higher position, thus meeting the needs of high-pressure pumping concrete mud.
  • the disadvantage of the S-type distribution valve is that the S-shaped elbow of the S-type distribution valve is located in the hopper 110, occupies a part of the volume of the hopper 110, and adversely affects the flow of the concrete slurry, thereby affecting the suction of the concrete pump. Performance; At the same time, since the S-shaped elbow is located in the hopper 110, it is easy to accumulate in the hopper.
  • the C-type distribution valve, skirt valve and S-type distribution valve work similarly, and have the same deficiencies.
  • Chinese Patent Publication No. CN101245866A discloses a concrete distribution valve.
  • the dispensing valve includes a valve body and a valve core located in the valve body; the valve body has a discharge port, a first suction port and a second suction port; the valve core includes an upper shaft and a lower shaft, and passes through the upper shaft
  • the lower shaft is rotatably mounted on the valve body, and the bearing and the sealing mechanism are respectively installed between the upper shaft and the lower shaft and the valve body; the axis of the upper and lower shafts of the valve core is a center line at a predetermined angle Within the range, the valve body rotates to form a left limit position and a right limit position; the spool also has a side opening and a feed port communicating with the mixed soil pump hopper.
  • the side opening When the spool is rotated to the left limit position, the side opening is in communication with the first suction port; when the spool is rotated to the right limit position, the side opening is in communication with the second suction port.
  • the feed port Utilizing the CN101245866A;; Kun; suspect soil distribution valve, because the distribution valve is separately arranged from the hopper, the use volume of the hopper can be increased, and the blades in the hopper can be more fully stirred; the feed port is vertically arranged downward, which is more favorable for entering
  • the pumping of coarse aggregates improves the suction performance of the concrete pump, avoids the accumulation of the hopper, and makes the hopper very easy to clean; during the pumping process, due to the arrangement between the valve body and the spool of the distribution valve
  • the distribution valve has the following disadvantages: In order to meet the needs of high-pressure pumping of concrete slurry, it is necessary to establish a high pressure in the valve body; because the valve body and the valve core cooperate with each other, the valve body and the valve core are kept in motion. Sealed sealing performance is the key to ensuring the performance of the dispensing valve.
  • the upper end of the valve core is provided with an upper shaft and a step surface, and the lower end is provided with a lower shaft and a step surface for the bottom surface of the cover and the valve core.
  • a tight pad is installed between the valve body and the bottom surface of the valve core; in order to extend the service life of the distribution valve, a wear plate is also installed between the cover plate and the gasket, and between the valve body and the gasket; The valve state is switched, and a guide plate is also installed between the wear plate and the gasket.
  • the valve core can move up and down, and any step surface matching clearance of the distribution valve can be reflected in the matching clearance of the other step surface; therefore, the structure of the upper and lower step surfaces amplifies the cooperation between the valve body and the valve core The clearance shortens the sealing period between the valve body and the valve core, resulting in a shorter service life of the distribution valve. Since the upper shaft and the lower shaft are respectively rotatably connected to the valve body, the complexity of the structure and the sealing need to make the rotating mating surface between the valve body and the valve core relatively large, thereby increasing the power required for the state transition of the distribution valve; In turn, the power consumption of the concrete pump truck is increased.
  • a first object of the present invention is to provide a concrete pump distribution valve having a simple structure, high reliability, long service life, and low manufacturing cost, in order to satisfy high pressure pumping. While the concrete slurry is needed, it reduces its power consumption and maintains good suction performance.
  • a second object of the present invention is to provide a mixed earth pump having the above-described distribution valve.
  • a distribution valve for a concrete pump includes a valve body and a valve core; a pumping chamber is formed inside the valve body, and has a discharge port, a feed port, and a first suction The discharge port is connected to the conveying pipe, and the first suction port is connected to a conveying cylinder.
  • the valve core is a tubular structure including a first pipe section and a second pipe section, and is located in the pumping cavity; the first pipe section extends vertically, and The material port is rotatably matched; the second pipe section extends laterally in the pumping cavity, the inner end thereof is in contact with the lower end of the first pipe section, and the end face of the outer end is matched with the inner wall surface of the pumping cavity to form a rotary matching surface; the first pipe section and the second pipe section The pipe section and the valve body are respectively matched by a sealing fit; the spool is driven between the first position and the second position by the driving mechanism, and in the first position, the outer end of the second pipe section communicates with the first suction port, In the second position, the first suction port is connected to the discharge port by pumping the moonlight.
  • the valve body has a second suction port communicating with the other delivery cylinder; in the first position, the second suction port communicates with the discharge port through the pumping chamber; in the second position, the second pipe segment is outside The end is in communication with the second suction port.
  • the second pipe segment includes a second pipe segment body and a compression ring, the inner end of the second pipe segment is in contact with the lower end of the first pipe segment, and the compression ring is mounted on the outer end of the second pipe segment.
  • a spring device is mounted between the pressure ring and the second pipe segment body.
  • the valve body further includes a wear plate, and the first suction port and the second suction port are located in the wear plate. Further, a smooth transition between the first pipe segment and the second pipe segment.
  • the intersection line between the rotary mating surface and the reference plane is a convex arc shape, and the reference plane passes through the center line of the first pipe segment.
  • the concrete pump provided by the present invention comprises a hopper, a conveying cylinder, a conveying pipe and a driving mechanism, and further comprises the above-mentioned distribution valve for a concrete pump, the center line of the first pipe section being perpendicular to the conveying red axis.
  • the drive mechanism is coupled to the first tube segment.
  • the distribution valve for the concrete pump further comprises a driving shaft whose center line coincides with the center line of the first pipe section, the inner end of the driving shaft is fixed to the lower end of the first pipe section, the outer end is extended outside the valve body, and the driving mechanism and the driving shaft are arranged ⁇ Eye connection.
  • the distribution valve for a concrete pump provided by the present invention is located at a predetermined position outside the hopper, the valve core includes a first pipe section and a second pipe section, the first pipe section extends vertically, and the outer wall surface and the valve body are The wall surface of the hole is rotatably connected, the second pipe section extends laterally in the pumping cavity, the inner end thereof is in contact with the lower end of the first pipe section, and the end surface of the outer end surface forms a rotary matching surface with the inner wall surface of the pumping cavity.
  • the first pipe section and the second pipe section of the valve core form an L-shaped pipe
  • the first pipe section is rotatably connected with the valve body
  • the outer end of the second pipe section forms a rotary matching surface with the inner wall surface of the pumping cavity.
  • the sealing period between the valve body and the valve core can be extended and the sealing is reliable, and the maintenance period of the distribution valve is prolonged. Further extending the service life of the distribution valve; since the mating surface between the valve core and the valve body is reduced, the frictional resistance generated between the two is also reduced, thereby reducing the power required for the rotation of the valve core, The power consumption of the distribution valve for the coagulation pump.
  • the cooperation between the first pipe section and the second pipe section and the valve body is respectively a sealing fit; thus, the high suction performance of the concrete slurry is satisfied, and the good suction performance is maintained.
  • the valve body further has a second suction port communicating with another conveying rainbow; in the first position, while a conveying cylinder is sucking through the spool, the The second suction port is in communication with the discharge port, and another conveying rainbow communicating with the second suction port can pump the concrete slurry sucked in the previous stage through the pumping chamber; in the second position, When a conveying siphon is pumping, the spool is in communication with the second suction port. At this time, another conveying cylinder can be sucked through the spool to provide a basis for the next stage of pumping.
  • the concrete pump can pump concrete slurry at a higher frequency to improve the pumping efficiency of the concrete pump.
  • a spring device is mounted between the compression ring of the second pipe segment and the second pipe segment body, so as to maintain a close fit of the rotary mating surface between the compression ring and the wear plate, and maintain the valve Good isolation between the core cavity and the pumping chamber better meets the needs of high pressure pumping concrete.
  • the intersection between the mating surface and the reference plane is a convex arc, and the rotating mating surface forms a structure in which the intermediate portion is convex outward and the surrounding portion extends inward. .
  • FIG. 1 is a structural view of an S-type distribution valve in the prior art
  • FIG. 2 is a schematic view showing an assembly structure of a distribution valve for a concrete pump according to a first embodiment of the present invention
  • FIG. 4 is a schematic structural view of a wear plate of a distribution valve for a mixed soil pump according to Embodiment 1.
  • FIG. 5 is a cross-sectional structural view of the flow direction of FIG. 4;
  • FIG. 7 is a cross-sectional structural view of a compression ring of a distribution valve for a concrete pump according to Embodiment 1;
  • FIG. 8 is a schematic cross-sectional view of the BB of FIG. 7;
  • 9 is a schematic diagram of the working principle of the distribution valve when the valve core of the distribution valve for the concrete pump is in the first position;
  • FIG. 10 is the distribution valve when the valve core of the distribution valve for the mixed soil pump is in the second position.
  • Figure 11 is a cross-sectional structural view taken along the reference plane CC of Figure 4;
  • Figure 12 is a schematic structural view of a concrete pump provided by the present invention;
  • Figure 13 is a schematic view showing the structure of another concrete pump provided by the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION In order to maintain the sealing of the pumping chamber to meet the needs of high pressure pumping of concrete mud, the prior art has designed a complex sealing structure to improve and ensure the sealing performance of the pumping chamber.
  • the core of the invention lies in the technical prejudice of the prior art to realize the sealing performance of the pumping chamber by the sealing structure, and by providing the structure of the distribution valve, providing a concrete with simple structure, high reliability, long service life and low manufacturing cost.
  • FIG. 2 is a schematic view showing the assembly structure of the distribution valve for the concrete pump of the first embodiment
  • FIG. 3 is a cross-sectional structural view of the valve body of the distribution valve for the mixed soil pump shown in FIG. Referring to Fig. 2, the following description takes the right side as the front and the left side as the back reference.
  • the distribution valve for a concrete pump provided in the first embodiment includes a valve body 200 and a valve body 300.
  • the valve body 200 is a housing structure including a front side wall, a rear side wall, a top wall and a bottom wall, and a cavity is formed therein, and the cavity is a pumping chamber 213.
  • the front side wall has an opening 211 to which a wear plate 250 is mounted.
  • the rear side wall has a discharge port 212 in communication with a conveying pipe capable of conveying the concrete slurry to a predetermined position.
  • the top wall includes a cover plate 220, and the cover plate 220 is provided with a feed port corresponding to the first pipe segment 310; the bottom wall has a discharge plate 240, and the discharge plate 240 can be disassembled when the concrete pump is stopped or The removal is performed to remove the muddy mud that remains in the pumping chamber 213.
  • FIG. 4 is a schematic structural view of a wear plate of a distribution valve for a concrete pump according to Embodiment 1
  • FIG. 5 is a cross-sectional structural view of the AA direction of FIG.
  • the wear plate 250 includes two suction ports.
  • the two suction ports are respectively referred to as a first suction port 251 and a second suction port 252, respectively, a first suction port 251 and a second suction port. 252 through the opening 211 and the mixing; the two conveying red of the suspect pump is in communication; the wear surface of the wear plate 250 is the working surface P, and the working surface P faces the pumping chamber 213. As shown in FIG. 5, the working surface P is a concave curved surface extending in the swinging direction of the pressing ring 322.
  • the wear plate 250 may be identical to the eyeglass plate in the prior art concrete pump to have predetermined impact resistance and wear resistance, except for the shape of the work surface. Referring to Fig. 6, Fig.
  • the spool 300 is a tubular structure including a first tube section 310 and a second tube section 320.
  • the first tube section 310 extends substantially vertically; the second tube section 320 extends laterally within the pumping chamber 213, the inner end of which is opposite the lower end of the first tube section 310.
  • the end surface of the outer end cooperates with the inner wall surface of the pumping chamber 213 to form a swivel mating surface; thus, the first tube section 310 and the second tube section 320 form an L-shaped tube.
  • the first pipe section 310 may also be disposed at a predetermined angle according to the position of the hopper.
  • the second pipe segment 320 is further provided with a compression ring 322.
  • the second pipe section 320 includes a second pipe section body 321 and a pressing ring 322. The inner end of the second pipe section body 321 is connected to the lower end of the first pipe section 310, and the pressing ring 322 is installed at the outer end of the second pipe section body 321 .
  • the outer end surface of the compression ring 322 forms an outer end surface of the second pipe section 320.
  • FIG. 7 is a cross-sectional structural view of the pressing ring
  • FIG. 8 is a cross-sectional structural view of FIG.
  • the working surface P' of the pressing ring 322 is a convex convex curved surface, which is adapted to the working surface P of the wear plate 250.
  • the working surface P' of the pressing ring 322 has the same curvature as the working surface P.
  • the compression ring 322 can be identical to the cutting ring in prior art hybrid pumps to have predetermined impact and wear resistance.
  • the spool 300 is movable relative to the valve body 200 under the driving of the predetermined driving mechanism, and is switched between the first position and the second position; when the spool 300 performs position conversion, the working surface P' of the pressing ring 322 is wear-resistant.
  • the working surface P of the plate 250 slides, and the two are closely matched, and a rotary mating surface is formed to isolate the inner cavity of the valve core 300 and the pumping chamber 213 to meet the needs of high-pressure pumping mixed soil.
  • the rotary mating surface refers to a surface formed by the working surface P' of the pressing ring 322 and the working surface P of the wear plate 250 when the pressing ring 322 rotates with the valve core 300.
  • a rubber spring 323 may be disposed between the pressing ring 322 and the second pipe segment body 321, and the rubber spring 323 can Maintaining a predetermined pressure between the compression ring 322 and the wear plate 250, and on the other hand, when the compression ring 322 or/and the wear plate 250 wear due to friction, the change in the fit gap between the two can be compensated for, The sealing fit between the compression ring 322 and the wear plate 250 is maintained.
  • the above-described object can also be achieved by using other elastic mechanisms and elastic members provided in the prior art, that is, other elastic mechanisms or elastic members are disposed between the pressing ring 322 and the second pipe segment body 321 . Referring to FIG.
  • the upper end of the first pipe section 310 extends beyond the valve body 200, and the outer wall surface adjacent to the upper end portion is rotatably fitted with the wall surface of the feed port on the cover plate 220, and the L-shaped pipe and valve of the valve body 300 are used.
  • the body 200 is mounted together and the axis of rotation XX coincides with the centerline of the first pipe section 310.
  • the first pipe section 310 and the feed port are rotatably and sealingly matched.
  • a wear-resistant sealing ring 231 is disposed between the first pipe section 310 and the wall of the feed port, and the wear-resistant sealing ring 231 is located on the cover plate 220.
  • the wear-resistant sealing ring 231 can ensure that the dispensing valve has a predetermined sealing performance, so that the dispensing valve has a proper maintenance cycle to meet the needs of high-pressure pumping mixed mud.
  • the working principle of the distribution valve for the mixed soil pump provided in the first embodiment is described in detail below.
  • FIG. 9 is a schematic view showing the working principle of the distribution valve when the spool of the concrete pump distribution valve is in the first position.
  • the spool 300 is rotated by the driving mechanism 400 with the rotation axis XX as a center line.
  • the hole of the pressing ring 322 communicates with the first suction port 251, and the second suction port 252 is connected to the discharge port 212 by pumping the moon 213.
  • FIG. 10 is a schematic diagram of the working principle of the distribution valve when the spool of the concrete pump distribution valve is in the second position.
  • the spool 300 is oscillated by the driving mechanism 400.
  • the hole of the pressing ring 322 communicates with the second suction port 252, and the first suction port 251 passes through the pumping chamber 213 and the outlet.
  • the ports 212 are in communication.
  • the second red conveying piston is retracted, and the appropriate amount of concrete slurry is sucked from the hopper through the valve core 300 to complete the suction; the first output cylinder piston is extended, and the concrete mud sucked in the previous stage is pushed out to make the concrete
  • the mud passes through the space formed between the outer wall surface of the valve body 300 and the inner wall surface of the pumping chamber 213, and then enters the conveying pipe through the discharge port 212 to realize pumping of the mixed soil slurry.
  • the spool 300 is rotated in the reverse direction to return to the first position, and the above process is repeated to enable the concrete pump to continuously pump the concrete slurry outward.
  • the dispensing valve provided in the first embodiment is located outside the hopper, preferably located below the hopper and connected to the outlet of the bottom of the hopper, the mixing can be fully utilized; the self-flow performance of the mud slurry is made to make the first conveying
  • the cylinder can easily suck in the concrete slurry, and can also install a stirrer in the hopper to force the concrete in the hopper into the first conveying cylinder, which greatly improves the suction performance of the concrete pump.
  • the cooperation of the first pipe section 310 and the second pipe section 320 with the valve body 200 is respectively a sealing fit; when the concrete mud is pumped outward through the pumping cavity 213, not only can the pressure in the pumping cavity be established, but also
  • the high pressure of the concrete slurry is mainly applied to the inner wall of the pumping chamber 213 and the outer wall surface of the valve core 300, and the pumping chamber 213 is evenly subjected to pressure, so that the distribution valve has a high pressure bearing capacity, and can satisfy the high pressure pumping concrete slurry. Need.
  • the distribution valve provided in this embodiment only provides a sealing structure at a position above the valve body 200, so that the sealing of the pumping chamber 213 can be realized, and it is not necessary to separately provide sealing pumping at the upper end and the lower end of the valve body 300.
  • the step surface of the cavity can greatly simplify the structure of the distribution valve for the concrete pump, improve the reliability of the distribution valve, make the production of the distribution valve easier and more convenient, and reduce the production cost of the distribution valve; Therefore, the maintenance period of the distribution valve can be prolonged and the service life thereof can be prolonged; meanwhile, since the mating surface between the valve body 300 and the valve body 200 is reduced, the frictional resistance generated between the two is also reduced, thereby reducing the valve The power required to rotate the core 300, and the power consumption of the distribution valve for the Hybrid Coagulation Pump. From the above description, it can be understood that the wear plate 250 can also be other specific structures. As shown in FIG. 11, the figure is a cross-sectional structural view taken along the reference plane CC in FIG. 4. In FIG.
  • the reference plane CC is perpendicular to the moving direction of the pressing ring 322, and passes through the first pipe section 310. Center line.
  • the intersection of the reference plane CC and the working surface P of the wear plate 250 is concave, preferably concave and convex; at this time, the mating surface between the pressing ring 322 and the wear plate 250 coincides with the working surface P.
  • the intersection of the mating surface and the reference plane CC may also be a concave arc shape; this causes the swivel mating surface to form a structure in which the intermediate portion is convex outward and the surrounding portion extends inward.
  • the structure can facilitate the alignment between the pressing ring 322 and the wear plate 250, and can also provide the wear plate 250 with a predetermined supporting force for the valve core 300 in the vertical direction, thereby improving the stability of the valve core 300. Improve the reliability of the distribution valve work.
  • the lateral extension of the second pipe section 320 means that there is a certain span in the lateral direction. Because of jtb, the second pipe section 320 is not limited to extend horizontally in the horizontal direction, and the extending direction thereof may be inclined downward or upward, even if the second pipe section The angle between the centerline of 320 and the centerline of the first pipe section 310 is greater than or less than 90 degrees to form an angle.
  • valve core 300 can also be set to other structures, and the object of the present invention can be achieved as long as the angle between the center line of the second pipe section 320 and the center line of the first pipe section 310 is not more than 180 degrees. . According to the above description, it is also possible to provide only the first suction port 251 on the wear plate 250 of the valve body 200.
  • the valve core 300 When only the first suction port 251 is provided, the valve core 300 is located at the first position, and the outer end of the second pipe segment (320) is in communication with the first suction port (251), and at this time, the first suction material can be made Port 251 connected to the loss
  • the sending rainbow is sucked through the valve core 300; in the second position of the spool 300, the conveying cylinder can pump the concrete slurry to the conveying pipe through the first suction port 251, the pumping chamber 213 and the discharge port 212, at this time,
  • the outer end of the second pipe section 320 cooperates with the inner wall surface of the pumping chamber 213 to maintain a seal. This also achieves the object of the present invention.
  • the present invention also provides a concrete pump based on the above-described distribution valve for a concrete pump.
  • FIG. 12 is a schematic structural view of a concrete pump provided by the present invention.
  • the concrete pump provided by the present invention comprises a hopper 600, a conveying cylinder 500, a conveying pipe (not shown) and a driving mechanism 400, and further includes any one of the above-mentioned concrete pump dispensing valves, which is located below the hopper 600, the valve core
  • the input end of the 300 is rotatably communicated with the outlet below the hopper 600.
  • the outlet of the hopper 600 is open downward and is located at the bottom of the hopper 600; the conveying red 500 is connected to the corresponding suction opening of the wear plate 250, The concrete slurry is sucked from the hopper 600, or the mixed soil slurry is pumped outward through the pumping chamber 213 of the distribution valve; the discharge port 212 communicates with the conveying pipe to guide the mixed mud slurry flowing out from the pumping chamber to The scheduled location.
  • the driving mechanism 400 is configured to drive the spool 300 for position conversion.
  • the driving mechanism 400 may include a rocker arm connected to the first pipe segment 310 and a mechanism for driving the rocker arm, which may be a hydraulic cylinder; the rocker arm may be coupled to the input end of the first pipe segment 310 Connected.
  • the drive mechanism 400 can also be other structures provided by the prior art.
  • FIG. 13 is a schematic structural view of another concrete pump provided by the present invention.
  • the distribution valve further includes a driving shaft 510. The inner end of the driving shaft 510 is fixedly connected with the valve core 300, and the outer end protrudes below the valve body 200.
  • the centerline of the drive shaft 510 is coincident with the axis of rotation XX; the drive mechanism 400 is located below the dispensing valve and its rocker arm is coupled to the outer end of the drive shaft 510.
  • the drive mechanism 500 can drive the spool 300 through the drive shaft 510 to rotate in a predetermined manner to effect switching between positions. It is also possible to provide the drive mechanism 400 both above and below the dispensing valve to ensure stability and reliability of the operation of the spool 300.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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；昆凝土泵用分配岡及'昆凝土泵 本申请要求于 2010年 4 月 16 日提交至中国国家知识产权局、 申请号为 201010164558.5、 发明名称为"混凝土泵用分配阀及混凝土泵，，的中国发明专利 申请的优先权。 技术领域 本发明涉及一种混疑土泵技术， 特别涉及一种混疑土泵用分配阀， 还涉及 到具有该分配阀的混！ ¾土泵。 背景技术 混疑土泵是当前应用广泛的混疑土机 ^戈之一， 混疑土泵一般包括料斗， 输 送缸， 分配阀和输送管。 料斗用于存放混凝土泥浆， 输送缸在液压缸驱动下进 行伸缩运动， 分配阀用于在预定的第一时间内使输送缸与料斗相连通， 使输送 缸吸料， 吸入适量的混凝土泥浆； 在预定的第二时间内使输送缸与输送管相连 通， 使输送虹泵料， 将吸入的混凝土泥浆压入输送管中， 使混凝土泥浆在输送 缸压力作用下到达预定位置。 其中， 分配阀是混凝土泵的关键部件之一。 混;疑土泵的分配阀主要有： 闸板型分配阀、 S型分配阀、 C型分配阀和裙 阀。 闸板型分配阀主要是通过分配阀内的两块闸板的上下运动， 在预定的第一 时间内， 使输送缸与料斗的输出口相连通， 使输送缸吸料， 在预定的第二时间 内， 使输送虹通过一个 Y字形管与输送管相连通， 使输送缸泵料。 闸板型分配 阀的优点在于： 具有较好的吸料性能和较高的泵料效率； 尤其对于粗骨料的混 凝土， 上述优势更加明显； 不足在于， 由于输送缸与输送管之间位置通过切换 闸板位置实现， 输送管内混凝土泥浆的压力受到闸板周边配合位置的限制， 闸 板型分配阀就无法满足高压泵送混凝土泥浆的需要。 请参考图 1 , 图 1是现有技术中一种具有 S型分配阀的结构图。 图中用双 点划线示出了料斗 110。 S型分配阀包括一个 S形弯管 120, S形弯管 120装在 料斗 110内， 其输入端能够在驱动机构 130驱动下在料斗 110内横向摆动， 以 依次接通两个输送缸 140; 其输出端与位于料斗 110外的输送管相连通。 两个 输送缸 140依次通过 S形弯管 120向输送管泵送混凝土泥浆。 S型分配阀的优 点在于： 输送缸泵料时产生的高压主要作用在 S形弯管内壁上， 截面为圓形的 整个 S形弯管均匀受拉力作用， S型分配阀可承受较大的压力， 其工作压力可 达到 16Mpa, 甚至更大； 因此， 利用 S型分配阀， 混凝土泵可以将混凝土泥浆 泵送更远的距离， 或者泵送到更高的位置， 从而能够满足高压泵送混凝土泥浆 的需要。 S型分配阀的不足之处在于： S型分配阀的 S形弯管位于料斗 110内， 占据了料斗 110的一部分容积， 并会对混凝土泥浆的流动造成不利影响， 从而 影响混凝土泵的吸料性能； 同时由于 S形弯管位于料斗 110内， 在料斗内容易 积料。
C型分配阀、 裙阀与 S型分配阀工作原理相近， 也存在相同的不足之处。 面对上述现有分配阀存在的不足， 中国专利文献 CN101245866A公开一种 混凝土分配阀。该分配阀包括阀体和位于阀体内的阀芯； 阀体具有一个出料口、 第一吸料口及第二吸料口； 阀芯包括上出轴和下出轴， 并通过上出轴和下出轴 可旋转地安装在阀体上， 上出轴和下出轴与阀体之间分别安装轴承及密封机 构； 阀芯以上出轴和下出轴的轴线为中心线，在预定角度范围内相对阀体旋转， 形成左极限位置和右极限位置； 阀芯还具有侧开口及与混疑土泵料斗相连通的 进料口。 阀芯旋转到左极限位置时， 侧开口与第一吸料口相连通； 阀芯旋转到 右极限位置时， 侧开口与第二吸料口相连通。 利用 CN101245866A公开的；;昆;疑土分配阀时， 由于该分配阀与料斗分开设 置， 可以增加料斗的使用容积， 使料斗内的叶片搅动更充分； 进料口垂直向下 布置， 更利于进料， 特别是对粗骨料的泵送， 提高混凝土泵的吸料性能， 避免 料斗积料， 并使得料斗非常容易清洗； 在泵送过程中， 由于分配阀的阀体和阀 芯之间设有与第一吸料口和第二吸料口及出料口相通的通道， 阀体能够保持该 通道的密封， 因此可以满足高压泵送混凝土泥浆的需要。 但是， 该分配阀存在 下述不足： 为了满足高压泵送混凝土泥浆的需要， 需要阀体内建立很高的压力； 由于 阀体与阀芯配合处为旋转配合， 保持阀体与阀芯配合处动密封的密封性能成为 保证分配阀工作性能的关键。 为了保证阀体与阀芯之间旋转配合的密封性， 在 CN101245866A中， 阀芯上端设置有上出轴和台阶面， 下端设置有下出轴和台 阶面， 以在盖板底面与阀芯之间以及阀体与阀芯底面之间安装密 垫； 为延长 分配阀的使用寿命， 还要在盖板与密封垫之间， 以及阀体与密封垫之间均安装 耐磨板； 为了便于分配阀状态的转换， 还在耐磨板与密封垫之间安装导向板。 上述结构使得分配阀具有非常复杂的结构， 不仅制造工艺复杂、 制造难度大， 还很难保证分配阀的工作可靠性。 同时， 阀芯能够上下游动， 分配阀的任一台 阶面配合间隙能够在另一个台阶面的配合间隙中体现； 因此， 上下两个台阶面 的结构会放大阀体与阀芯之间的配合间隙， 缩短阀体与阀芯之间的密封有效 期， 导致分配阀的使用寿命较短。 由于上出轴和下出轴分别与阀体上可旋转连接， 结构的复杂性和密封需要 使阀体与阀芯之间旋转配合面比较大， 从而增加了分配阀状态转换所需要的动 力； 进而增加混凝土泵车的动力消耗。 发明内容 针对上述混凝土分配阀存在的不足， 本发明的第一个目的在于， 提供一种 结构简单， 可靠性高、 使用寿命长， 制造成本低的混凝土泵用分配阀， 以在满 足高压泵送混凝土泥浆的需要的同时， 降低其动力消耗，保持良好的吸料性能。 在提供上述分配阀的基础上， 本发明的第二个目的在于提供一种具有上述 分配阀的混疑土泵。 为了实现上述的第一个发明目的， 本发明提供的一种混凝土泵用分配阀， 包括阀体和阀芯； 阀体内部形成泵送腔， 且具有出料口、 进料口和第一吸料口； 出料口连通输送管， 第一吸料口连通一个输送缸， 阀芯为包括第一管段和第二 管段的管状结构， 位于泵送腔内； 第一管段竖向延伸， 与进料口可旋转配合； 第二管段在泵送腔内横向延伸， 其内端与第一管段的下端相接， 外端的端面与 泵送腔内壁面相配合形成回转配合面； 第一管段和第二管段与阀体的配合分别 为密封配合； 阀芯在驱动机构驱动下在第一位置与第二位置之间转换， 在第一 位置， 第二管段外端与第一吸料口相连通， 在第二位置， 第一吸料口通过泵送 月空与出料口相连通。 进一步地， 阀体具有与另一输送缸相连通的第二吸料口； 在第一位置， 第 二吸料口通过泵送腔与出料口相连通； 在第二位置， 第二管段外端与第二吸料 口相连通。 进一步地， 第二管段包括第二管段体和压紧环， 第二管段体内端与第一管 段下端相接， 压紧环安装在第二管段体外端。 进一步地， 压紧环与第二管段体之间安装有弹簧装置。 进一步地， 阀体还包括耐磨板， 第一吸料口和第二吸料口位于耐磨板中。 进一步地， 第一管段和第二管段之间圓滑过渡。 进一步地， 回转配合面与参考平面之间的交线为外凸的弧线形， 参考平面 通过第一管段的中心线。 为了实现上述的第二个发明目的， 本发明提供的混凝土泵包括料斗、 输送 缸、 输送管和驱动机构， 还包括上述的混凝土泵用分配阀， 第一管段的中心线 与输送紅轴线垂直。 进一步地， 驱动机构与第一管段相连。 进一步地， 混凝土泵用分配阀还包括中心线与第一管段的中心线重合的驱 动轴， 驱动轴内端与第一管段下端固定， 外端伸出阀体外， 驱动机构与驱动轴 夕卜端 ^目连。 与现有技术相比， 本发明提供的混凝土泵用分配阀位于料斗之外的预定位 置， 阀芯包括第一管段和第二管段， 第一管段竖向延伸， 且其外壁面与阀体的 孔壁面可旋转相连， 第二管段在泵送腔内横向延伸， 其内端与第一管段的下端 相接， 其外端的端面与所述泵送腔的内壁面之间形成回转配合面。 这样， 阀芯 的第一管段与第二管段形成 L形管， 第一管段与阀体可旋转相连， 第二管段外 端与泵送腔内壁面之间形成回转配合面。 与现有技术 CN101245866A提供的分 配阀相比， 仅在阀体上方位置设置密封结构， 不需要设置旋转配合的台阶面； 这样就大大简化了混凝土泵用分配阀的结构， 使分配阀的制造更容易、 方便， 提高分配阀的工作可靠性， 且降低分配阀的生产成本； 由于不存在台阶面， 可 以延长阀体与阀芯之间的密封有效期且密封可靠， 延长了分配阀的维护周期， 进而延长了分配阀的使用寿命； 由于阀芯与阀体之间的配合面减小， 二者之间 产生的摩擦阻力也减小， 从而可以减小阀芯旋转的所需要的动力， 降氏混凝泵 用分配阀的动力消耗。 另外， 第一管段和第二管段与阀体的配合分别为密封配 合； 这样就在满足高压泵送混凝土泥浆的需要的同时，保持了良好的吸料性能。 在进一步的优选技术方案中， 所述阀体还具有与另一个输送虹相连通的第 二吸料口； 在所述第一位置时， 在一个输送缸通过阀芯吸料的同时， 所述第二 吸料口与出料口相连通， 与第二吸料口相连通的另一输送虹能够将上一阶段吸 入的混凝土泥浆通过泵送腔进行泵料； 在所述第二位置时， 一个输送虹在泵料 时， 阀芯与第二吸料口相连通， 此时， 另一个输送缸可以通过阀芯进行吸料， 为下一阶段泵料提供基础。 利用该技术方案提供的分配阀， 混凝土泵能够以较 高的频率向外泵送混凝土泥浆， 提高混凝土泵的泵送效率。 在进一步的优选技术方案中， 第二管段的压紧环与所述第二管段体之间安 装的弹簧装置， 这样能够保持压紧环与耐磨板间的回转配合面的紧密配合， 保 持阀芯内腔与泵送腔之间的良好隔离， 更好地满足高压泵送混凝土的需要。 在进一步的优选技术方案中， 使所述配合面与所述参考平面与之间的交线 为外凸的弧线， 使回转配合面形成一个中间部分向外凸， 四周部分向内延伸的 结构。 该结构能够在第二管段与阀体内壁面配合时， 自动对正， 并保持密封； 还能够使阀体为阀芯提供一定的支承力， 提高分配阀的工作稳定性和可靠性。 在提供上述混凝土泵用分配阀的基础上， 还提供了一种具有上述分配阀的 混凝土泵， 该混凝土泵也具有相对应的技术效果。 附图说明 图 1是现有技术中一种 S型分配阀的结构图； 图 2是本发明实施例一提供的混凝土泵用分配阀的装配结构示意图； 图 3是实施例一混凝土泵用分配阀的阀体的剖视结构示意图； 图 4是实施例一混疑土泵用分配阀的耐磨板的结构示意图； 图 5是图 4中 A-A方向剖视结构示意图； 图 6是实施例一混疑土泵用分配阀的阀芯的剖视结构示意图； 图 7是实施例一混凝土泵用分配阀的压紧环的剖视结构示意图； 图 8是图 7中 B-B剖视结构示意图； 图 9是实施例一混凝土泵用分配阀的阀芯位于第一位置时， 分配阀的工作 原理示意图； 图 10 是实施例一混疑土泵用分配阀的阀芯位于第二位置时， 分配阀的工 作原理示意图； 图 11是沿图 4中参考平面 C-C进行剖视的剖视结构示意图； 图 12是本发明提供的一种混凝土泵的结构示意图； 图 13是本发明提供的另一种混凝土泵的结构示意图。 具体实施方式 为了保持泵送腔的密封性， 满足高压泵送混凝土泥浆的需要， 现有技术设 计了复杂的密封结构来提高并保证泵送腔的密封性能。 本发明的核心在于， 克 艮现有技术通过密封结构实现泵送腔密封性能的技术偏见， 通过改变分配阀的 结构， 提供一种结构简单， 可靠性高、 使用寿命长， 制造成本低的混凝土泵用 分配阀， 实现本发明的目的。 下面结合附图对本发明进行详细描述， 本部分的描述仅是示范性和解释 性， 不应对本发明的保护范围有任何的限制作用。 应当说明的是， 虽然本发明 提供的技术方案适用泵送混疑土， 但也可以用于泵送泥浆或其他与混疑土泥浆 具有相同性能的粘稠物。 请参考图 2、 该图是实施例一混凝土泵用分配阀的装配结构示意图； 图 3 是图 2所示混疑土泵用分配阀的阀体的剖视结构示意图。 以图 2为参照， 以下 描述以右侧为前， 左侧为后参照进行。 实施例一提供的混凝土泵用分配阀包括阀体 200和阀芯 300。 结合图 3 , 阀体 200为一个壳体结构， 包括前侧壁、 后侧壁、 顶壁和底壁， 其内部形成一 个空腔， 该空腔为泵送腔 213。 前侧壁具有一个开口 211 , 相对该开口 211安 装有耐磨板 250。 后侧壁具有与一个输送管相连通的出料口 212, 输送管能够 将混凝土泥浆输送到预定位置。 顶壁包括一个盖板 220, 盖板 220设置有与第 一管段 310相对应的进料口； 底壁具有一个卸料板 240, 在混凝土泵停止运转 时， 可以将卸料板 240拆开或移开， 以将滞留在泵送腔 213中的混疑土泥浆清 除。 请参考图 4和图 5 , 图 4是实施例一混凝土泵用分配阀的耐磨板的结构示 意图， 图 5是图 4中 A-A方向剖视结构示意图。 耐磨板 250包括两个吸料口， 为了描述的方便， 两个吸料口分别称为第一吸料口 251和第二吸料口 252, 第 一吸料口 251和第二吸料口 252通过开口 211分别与混;疑土泵的两个输送紅相 连通； 耐磨板 250耐磨面为工作面 P, 工作面 P朝向泵送腔 213。 如图 5所示， 工作面 P为沿压紧环 322摆动方向延伸的一个凹形曲面。除其工作面的形 ^1大外 , 耐磨板 250可以与现有技术混凝土泵中的眼镜板相同， 以具有预定的耐冲击性 和耐磨性。 参考图 6, 图 6是实施例一混凝土泵用分配阀的阀芯的剖视结构示意图。 阀芯 300为管状结构， 包括第一管段 310和第二管段 320, 第一管段 310基本 竖向延伸； 第二管段 320在泵送腔 213内横向延伸， 其内端与第一管段 310的 下端相接， 外端的端面与泵送腔 213的内壁面相配合， 形成回转配合面； 这样， 第一管段 310和第二管段 320就形成一个 L形管。 为了减小混凝土泥浆流动阻 力， 最好使第一管段 310与第二管段 320之间圓滑过渡。 另外， 第一管段 310 也可以根据料斗的位置设置成预定的角度倾斜设置。 由于第二管段 320外端与泵送腔 213内壁面之间为运动配合， 为了降低第 二管段 320的磨损速度， 本实施例中， 第二管段 320还设置有压紧环 322。 参 考图 6, 第二管段 320包括第二管段体 321和压紧环 322, 第二管段体 321 内 端与第一管段 310下端相接， 压紧环 322安装在第二管段体 321外端， 压紧环 322外端面形成第二管段 320的外端面。 请参考图 7和图 8, 图 7是压紧环的剖视结构示意图， 图 8是图 7中 B-B 剖视结构示意图。 压紧环 322的工作面 P'为一外凸的凸形曲面， 与耐磨板 250 的工作面 P相适应， 压紧环 322的工作面 P'与工作面 P具有相同的曲率。 除其 工作面的形状外， 压紧环 322可以与现有技术混疑土泵中的切割环相同， 以具 有预定的耐冲击性和耐磨性。 阀芯 300能够在预定驱动机构驱动下相对于阀体 200运动， 并在第一位置 与第二位置之间转换； 在阀芯 300进行位置转换时， 压紧环 322工作面 P'沿耐 磨板 250的工作面 P滑动， 二者之间为密 配合， 且形成一个回转配合面， 以 隔离阀芯 300内腔与泵送腔 213 , 满足高压泵送混疑土的需要。 所述回转配合 面，是指压紧环 322随阀芯 300旋转时，压紧环 322工作面 P'保持与耐磨板 250 工作面 P配合形成的面。 再参考图 6, 为了保持压紧环 322与耐磨板 250之间的压紧力， 在压紧环 322与第二管段体 321之间还可以设置有橡胶弹簧 323 , 橡胶弹簧 323—方面 能够使压紧环 322与耐磨板 250之间保持预定的压力，另一方面，在压紧环 322 或 /和耐磨板 250由于摩擦而磨损时， 可以补偿二者之间的配合间隙变化， 保持 压紧环 322与耐磨板 250之间的密封配合。 另夕卜， 也可以应用现有技术中提供 的其他弹性机构和弹性部件实现上述目的， 即在压紧环 322与第二管段体 321 之间设置其他弹性机构或弹性部件。 参考图 2, 第一管段 310上端伸出阀体 200之处， 且其靠近上端部分的外 壁面与盖板 220上的进料口的壁面可旋转配合，将阀芯 300的 L形管与阀体 200 安装在一起， 旋转轴线 X-X与第一管段 310的中心线重合。 第一管段 310与进 料口的配合为可旋转地、 密封配合； 本例中， 第一管段 310与进料口壁面之间 设置有耐磨密封环 231 ,耐磨密封环 231位于盖板 220的槽中，并由定位板 230 在其上端定位， 以使耐磨密封环 231保持在第一管段 310与盖板 220之间， 保 持泵送腔 213具有预定的密封性能； 这样还能够减小第一管段 310与盖板 220 进料口内壁面之间的摩擦力， 延长分配阀的使用寿命。 实验证明， 通过耐磨密 封环 231可以保证分配阀具有预定的密封性能，使分配阀具有合适的维护周期， 满足高压泵送混疑土泥浆的需要。 以下结合混;疑土泵对实施例一提供的混疑土泵用分配阀的工作原理进行 详细描述。 为了描述的方便， 设与第一吸料口 251相连通的输送缸为第一输送 紅， 与第二吸料口 252相连通的输送紅为第二输送紅。 请参考图 9, 该图是实施例一混凝土泵用分配阀的阀芯位于第一位置时， 分配阀的工作原理示意图。阀芯 300在驱动机构 400驱动下以旋转轴线 X-X为 中心线进行旋转， 在阀芯 300位于第一位置时， 压紧环 322的孔与第一吸料口 251相连通， 第二吸料口 252通过泵送月空 213与出料口 212相连通。 jt匕时， 第 一输送虹的活塞回缩， 通过阀芯 300从料斗中吸入适量的混凝土泥浆， 完成吸 料。 与此同时第二输出缸的活塞伸出， 将第二输送虹内上一阶段的混凝土泥浆 压出，使混凝土泥浆通过阀芯 300外壁面与泵送腔 213内壁面之间形成的空间， 再通过出料口 212进入输送管中， 实现混疑土泥浆的泵送。 请参考图 10, 该图是实施例一混凝土泵用分配阀的阀芯位于第二位置时， 分配阀的工作原理示意图。 阀芯 300在驱动机构 400驱动下摆动， 在阀芯 300 位于第二位置时， 压紧环 322的孔与第二吸料口 252相连通， 第一吸料口 251 通过泵送腔 213与出料口 212相连通。 此时， 第二输送紅的活塞回缩， 通过阀 芯 300从料斗中吸入适量的混凝土泥浆， 完成吸料； 第一输出缸活塞伸出， 将 上一阶段吸入的混凝土泥浆压出， 使混凝土泥浆通过阀芯 300外壁面与泵送腔 213 内壁面之间形成的空间， 再通过出料口 212进入输送管中， 实现混疑土泥 浆的泵送。 然后再使阀芯 300反向旋转， 回到第一位置， 反复上述过程， 使混 凝土泵能够连续地向外泵送混凝土泥浆。 由于实施例一提供的分配阀位于料斗外， 优选位于料斗下方， 并与料斗底 部的输出口相连， 因此， 即可以充分利用混;疑土泥浆的自流性能， 使第一输送 缸可以 4艮容易地吸入混凝土泥浆， 又能在料斗内装搅拌器， 将料斗内的混凝土 强制送入第一输送缸， 极大地提高混凝土泵的吸料性能。 同时， 第一管段 310 和第二管段 320与阀体 200的配合分别为密封配合； 在通过泵送腔 213向外泵 送混凝土泥浆， 不仅可以为泵送腔内的压力建立提供便利， 还可以使混凝土泥 浆的高压主要作用在泵送腔 213的内壁和阀芯 300的外壁面上， 泵送腔 213均 匀承受压力作用， 使分配阀具有较高的压力承受能力， 能够满足高压泵送混凝 土泥浆的需要。 更重要的是： 本实施例提供的分配阀仅在阀体 200上方位置设 置密封结构， 就可以实现对泵送腔 213的密封， 不需要在阀芯 300上端和下端 分别设置用于密封泵送腔的台阶面， 这样可以大大简化混凝土泵用分配阀的结 构， 提高分配阀的工作可靠性， 使分配阀的制造更容易、 方便， 降低分配阀的 生产成本； 由于分配阀的可靠性较高， 从而可以延长分配阀的维护周期， 延长 其使用寿命； 同时， 由于阀芯 300与阀体 200之间的配合面减小， 二者之间产 生的摩擦阻力也减小， 从而可以减小阀芯 300旋转的所需要的动力， 降氏混凝 泵用分配阀的动力消耗。 根据上述描述， 可以理解， 耐磨板 250 也可以是其他具体结构。 如图 11 所示， 该图是沿图 4中参考平面 C-C进行剖视的剖视结构示意图； 图 4中， 参 考平面 C-C与所述压紧环 322运动方向相垂直， 并通过第一管段 310中心线。 参考平面 C-C与耐磨板 250的工作面 P的交线为凹形， 优选外凹的弧线形； 此 时， 压紧环 322与耐磨板 250之间的配合面与工作面 P相重合， 配合面与参考 平面 C-C的交线也可以为外凹的弧线形； 这就使回转配合面形成一个中间部分 向外凸， 四周部分向内延伸的结构。 该结构一方面能够方便压紧环 322与耐磨 板 250之间的对正， 还能够使耐磨板 250在垂直方向上为阀芯 300提供预定的 支承力， 提高阀芯 300的稳定性， 提高分配阀工作的可靠性。 另外， 所述第二管段 320横向延伸是指在横向方向上具有一定的跨距， 因 jtb, 第二管段 320不限于在水平横向延伸， 其延伸方向可以向下或向上倾斜， 即使第二管段 320的中心线与第一管段 310 中心线之间的夹角大于或小于 90 度， 形成一定角度。 为了适应不同结构的混凝土泵， 还可以将阀芯 300设置为 其他结构， 只要第二管段 320的中心线与第一管段 310中心线之间的夹角不大 于 180度就可以实现本发明的目的。 根据上述描述，还可以在阀体 200的耐磨板 250上仅设置第一吸料口 251。 在仅设置第一吸料口 251 时， 在阀芯 300位于第一位置， 第二管段 ( 320 ) 外 端与第一吸料口 （251 )相连通， 此时， 可以使与第一吸料口 251 相连通的输 送虹通过阀芯 300吸料； 在阀芯 300位于第二位置， 输送缸可以通过第一吸料 口 251、 泵送腔 213和出料口 212向输送管泵送混凝土泥浆， 此时， 第二管段 320外端与泵送腔 213内壁面配合， 保持密封。 这样也可以实现本发明的目的。 在提供上述混凝土泵用分配阀的基础上， 本发明还提供了混凝土泵。 请参考图 12, 该图是本发明提供的一种混凝土泵的结构示意图。 本发明提 供的混凝土泵包括料斗 600、 输送缸 500、 输送管 （图中未示出） 和驱动机构 400, 还包括上述任一种混凝土泵用分配阀， 该分配阀位于料斗 600 下方， 阀 芯 300的输入端与料斗 600下方的输出口可旋转地相连通， 优选料斗 600的输 出口开口朝下， 且位于料斗 600底部； 输送紅 500与耐磨板 250的相应吸料口 相连通， 以从料斗 600吸入混凝土泥浆， 或通过分配阀的泵送腔 213向外泵送 混疑土泥浆； 出料口 212与输送管相连通， 以将从泵送腔中流出的混疑土泥浆 引到预定的位置。驱动机构 400用于驱动阀芯 300进行位置转换，驱动机构 400 可以包括与第一管段 310相连的摇臂及驱动摇臂的机构， 可以是液压缸； 摇臂 可以与第一管段 310的输入端相连。 驱动机构 400还可以是现有技术提供的其 他结构。 如图 13 所示的本发明提供的另一种混凝土泵的结构示意图， 分配阀还包 括设置驱动轴 510,驱动轴 510内端与阀芯 300固定相连，外端伸出了阀体 200 下方， 并使驱动轴 510的中心线与旋转轴线 X X重合； 驱动机构 400位于分配 阀下方， 其摇臂与驱动轴 510的外端相连。 该混疑土泵中， 驱动机构 500可以 通过驱动轴 510驱动阀芯 300以预定的方式旋转， 实现位置之间的转换。 也可 以在分配阀上方和下方同时设置驱动机构 400以保证阀芯 300工作的稳定性和 可靠性。 以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若千改进、 润饰或 变化， 比如， 在特定情形下， 可以省去压紧环或 /和耐磨板等等； 这些改进、 润 饰或变化也应视为本发明公开的内容。

Claims

权 利 要 求 书
1. 一种混凝土泵用分配阀， 包括阀体（ 200 )和阀芯（ 300 ); 所述阀体（ 200 ) 内部形成泵送腔（ 213 ),且具有出料口（ 212 )、进料口和第一吸料口（ 251 ); 所述出料口 （212) 连通输送管， 所述第一吸料口 （251) 连通一个输送 虹， 其特征在于， 所述阀芯 （ 300 )为包括第一管段（ 310 )和第二管段（ 320 ) 的管状 结构， 位于泵送腔内； 所述第一管段（310)竖向延伸， 与进料口可旋转 配合； 所述第二管段 (320) 在泵送腔 （213) 内横向延伸， 其内端与第 一管段 (310) 的下端相接， 外端的端面与所述泵送腔 (213 ) 内壁面相 配合形成回转配合面； 所述第一管段 (310) 和所述第二管段 (320) 与 所述阀体 （200) 的配合分别为密封配合；
所述阀芯 （ 300 ) 在驱动机构 （400) 驱动下在第一位置与第二位置 之间转换，在所述第一位置，所述第二管段（ 320 )外端与第一吸料口（ 251 ) 相连通，在所述第二位置，所述第一吸料口（251 )通过所述泵送腔（213 ) 与所述出料口 （212) 相连通。
2. 根据权利要求 1所述的混凝土泵用分配阀， 其特征在于，
所述阀体（200)具有与另一输送虹相连通的第二吸料口 （252); 在 所述第一位置，所述第二吸料口（252)通过泵送腔（213 )与出料口（212) 相连通； 在所述第二位置，所述第二管段（320)外端与第二吸料口（252) 相连通。
3. 根据权利要求 2所述的混凝土泵用分配阀， 其特征在于，
所述第二管段 （320) 包括第二管段体 （321) 和压紧环 （322), 所 述第二管段体（321 )内端与第一管段（310)下端相接，所述压紧环（322) 安装在所述第二管段体 （321) 外端。
4. 居权利要求 3 所述的混凝土泵用分配阀， 其特征在于， 所述压紧环
(322) 与所述第二管段体 (321 ) 之间安装有弹簧装置。
5. 根据权利要求 2-4 中任一项所述的混凝土泵用分配阀， 其特征在于， 所 述阀体 （200) 还包括耐磨板 （250), 所述第一吸料口 （251) 和第二吸 料口 （252) 位于所述耐磨板 (250 ) 中。
6. 根据权利要求 1-4 中任一项所述的混凝土泵用分配阀， 其特征在于， 所 述第一管段 （310) 和第二管段（320) 之间圓滑过渡。
7. 根据权利要求 1-4 中任一项所述的混凝土泵用分配阀， 其特征在于， 所 述回转配合面与参考平面 （C-C) 之间的交线为外凸的弧线形， 所述参 考平面 （C-C) 通过所述第一管段 （310) 的中心线。
8. —种混凝土泵，包括料斗（ 600 ),输送紅（ 500 ),输送管和驱动机构（ 400 ), 其特征在于， 还包括权利要求 1-6 中任一项所述的混凝土泵用分配阀， 所述第一管段 (310) 的中心线与所述输送虹 ( 500) 轴线垂直。
9. 居权利要求 8所述的混凝土泵， 其特征在于， 所述驱动机构（400)与 所述第一管段 （310) 相连。
10. 根据权利要求 8所述的混凝土泵， 其特征在于， 所述混凝土泵用分配阀 还包括中心线与所述第一管段 (310)的中心线重合的驱动轴（510), 所 述驱动轴（510) 内端与第一管段（310)下端固定， 外端伸出阀体（200) 夕卜， 所述驱动机构 (400) 与所述驱动轴 （510) 外端相连。
PCT/CN2011/072962 2010-04-16 2011-04-18 混凝土泵用分配阀及混凝土泵 Ceased WO2011127842A1 (zh)

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CN102619719B (zh) * 2012-04-25 2014-12-10 中联重科股份有限公司 泵送分配机构、泵送装置及其控制方法、混凝土泵车
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CN111043027B (zh) * 2020-01-03 2024-10-29 徐州徐工施维英机械有限公司 一种分配阀及泵送机械
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