JPH0417846Y2 - - Google Patents

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Publication number
JPH0417846Y2
JPH0417846Y2 JP10703887U JP10703887U JPH0417846Y2 JP H0417846 Y2 JPH0417846 Y2 JP H0417846Y2 JP 10703887 U JP10703887 U JP 10703887U JP 10703887 U JP10703887 U JP 10703887U JP H0417846 Y2 JPH0417846 Y2 JP H0417846Y2
Authority
JP
Japan
Prior art keywords
bellows
stopper
space
pressure
moving plate
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
Application number
JP10703887U
Other languages
Japanese (ja)
Other versions
JPS6415802U (en
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 filed Critical
Priority to JP10703887U priority Critical patent/JPH0417846Y2/ja
Publication of JPS6415802U publication Critical patent/JPS6415802U/ja
Application granted granted Critical
Publication of JPH0417846Y2 publication Critical patent/JPH0417846Y2/ja
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Diaphragms And Bellows (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、各種の流体圧送配管における脈圧吸
収技術に係るベローズアキユムレータの改良に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a bellows accumulator related to pulse pressure absorption technology in various fluid pressure delivery piping.

〔従来の技術〕[Conventional technology]

従来から、第３図および第４図に示すように、
ガス封入口３と流体圧送配管（図示せず）に連通
せしめられる連通孔４を設けたケース１の内部
に、一端を該ケース１の連通孔４側の端壁２に固
着されるとともに他端に移動プレート６を固着し
た伸縮自在なベローズ５を内装し、ケース１の内
部をこのベローズ５と移動プレート６によりガス
を封入するガス室７と配管側から前記連通孔４を
介して圧力流体が出入りする流体室８との仕切
り、前記ベローズ５の伸縮に伴なう両室７，８の
容積の増減とその圧力の均衡により前記配管に生
じる脈圧を吸収するベローズ型のアキユムレータ
が知られている。符号９は、ベローズ５の内周に
おいて前記端壁２に立設されたパイプ状のストツ
パを示し、流体室８の圧力が下がつて移動プレー
ト６が図における下方へ移動するときに該プレー
ト６の移動を所定の位置までに抑えることにより
ベローズ５の縮み過ぎによる破損を防止してい
る。 Conventionally, as shown in Figs. 3 and 4,
Inside a case 1 provided with a communication hole 4 that communicates with a gas sealing inlet 3 and a fluid pressure pipe (not shown), one end is fixed to the end wall 2 on the side of the communication hole 4 of the case 1, and the other end is fixed. A telescopic bellows 5 to which a movable plate 6 is fixed is installed inside the case 1, and the bellows 5 and the movable plate 6 connect the inside of the case 1 to a gas chamber 7 in which gas is sealed, and a pressurized fluid flows from the piping side through the communication hole 4. A bellows-type accumulator is known that absorbs the pulse pressure generated in the piping by partitioning the fluid chamber 8 into and out, increasing and decreasing the volume of both chambers 7 and 8 as the bellows 5 expands and contracts, and balancing the pressures. There is. Reference numeral 9 indicates a pipe-shaped stopper that is installed upright on the end wall 2 on the inner periphery of the bellows 5, and when the pressure in the fluid chamber 8 decreases and the movable plate 6 moves downward in the figure, the stopper stops the plate 6. By suppressing the movement of the bellows 5 to a predetermined position, breakage due to excessive contraction of the bellows 5 is prevented.

上記従来のベローズアキユムレータにおいて、
第３図の状態から流体室８の圧力（ライン圧）が
下がつてベローズ５が収縮し、移動プレート６が
ストツパ９の端縁９′に当接した時点で、流体室
８はストツパ９の内周側空間８ａとストツパ９の
外周側空間８ｂに分けられる（第４図参照）。こ
のとき、空間８ｂは密閉状態となるため、該空間
８ｂの圧力P3とガス室７の圧力P1は均衡（すな
わちP3＝P1）したまま安定し、したがつてライ
ン圧P2（空間８ａ側の圧力）が P2≧P1 になれば、移動プレート６はストツパ９の端縁
９′から直ちに離れ、ベローズ５は自由に作動す
る。 In the above conventional bellows accumulator,
When the pressure (line pressure) in the fluid chamber 8 decreases from the state shown in FIG. It is divided into an inner circumferential space 8a and an outer circumferential space 8b of the stopper 9 (see FIG. 4). At this time, since the space 8b is in a sealed state, the pressure P 3 in the space 8b and the pressure P 1 in the gas chamber 7 remain balanced (that is, P 3 = P 1 ) and stabilize, so that the line pressure P 2 ( When the pressure on the space 8a side becomes P 2 ≧P 1 , the movable plate 6 immediately separates from the edge 9' of the stopper 9, and the bellows 5 operates freely.

〔考案が解決しようとする問題点〕[Problem that the invention attempts to solve]

ところが、第４図に図示した状態でのライン圧
P2の低下に伴なう空間８ｂの圧力P3との差圧等、
何らかの原因により、ストツパ９の端縁９′と移
動プレート６の間のわずかな隙間を通じて空間８
ｂから空間８ａへの流体の漏れがあると、 P3＜P1 になるため、ライン圧P2が再び上昇して P2＝P1 となつても、空間８ｂの圧力P3が低圧であるこ
とから移動プレート６は前記端縁９′に吸着され
た状態が保持され、ベローズ５は作動しないとい
う欠点があつた。 However, in the state shown in Figure 4, the line pressure
The pressure difference between the pressure in the space 8b and the pressure P 3 due to the decrease in P 2 , etc.
For some reason, the space 8 may be leaked through a small gap between the edge 9' of the stopper 9 and the moving plate 6.
If fluid leaks from b to space 8a, P 3 < P 1 , so even if line pressure P 2 rises again and P 2 = P 1 , pressure P 3 in space 8b remains low. For this reason, the movable plate 6 remains attracted to the edge 9', and the bellows 5 does not operate.

そこで本考案は、ライン圧の変化に対するベロ
ーズの作動応答性を向上させる目的でなされたも
のである。 Therefore, the present invention was developed with the aim of improving the operational response of the bellows to changes in line pressure.

〔問題点を解決するための手段〕[Means for solving problems]

すなわち、本考案のベローズアキユムレータ
は、移動プレートに、一端がストツパの内周側空
間へ臨んで開口し他端がベローズ内周におけるス
トツパの外周側空間へ臨んで開口する流通路を設
け、該流通路内に、前記外周側空間より内周側空
間が高圧となつたときに開弁するチエツク弁を設
けた構成とすることによつて上記問題の解決を可
能としている。 That is, in the bellows accumulator of the present invention, the moving plate is provided with a flow passage whose one end opens toward the inner circumferential space of the stopper and whose other end opens toward the outer circumferential space of the stopper on the inner circumference of the bellows. The above problem can be solved by providing a check valve in the flow path that opens when the pressure in the inner space becomes higher than that in the outer space.

〔作用〕[Effect]

本考案の構成によれば、ストツパと移動プレー
トの密接状態において、仮にベローズ内周におけ
るストツパの外周側空間が、ベローズ外周のガス
室よりも低圧となつても、ストツパの内周側空間
のライン圧が上昇して前記外周側空間の圧力値を
超えると、チエツク弁は開弁してストツパの内外
周側の両空間は均圧するため、前記ライン圧がベ
ローズ外周の圧力値を超えた時点で直ちにベロー
ズは作動する。 According to the configuration of the present invention, when the stopper and the moving plate are in close contact with each other, even if the outer space of the stopper on the inner periphery of the bellows has a lower pressure than the gas chamber on the outer periphery of the bellows, the line in the inner space of the stopper When the pressure rises and exceeds the pressure value of the outer circumferential space, the check valve opens and the pressure in both the inner and outer circumferential spaces of the stopper is equalized. The bellows operates immediately.

〔実施例〕〔Example〕

つぎに、第１図および第２図に示す本考案の一
実施例を、既述した第３図および第４図の従来例
構造のものと異なる点を中心に説明すると、移動
プレート６の内部には、一端開口１０ａがベロー
ズ５内周の流体室８のうちのストツパ９の内周側
空間８ａに臨み、他端開口１０ｂがストツパ９の
外周側空間８ｂに望む流通孔１０が穿たれてお
り、該流通孔１０の中途に形成された弁室１１に
は、バネ１４によつて球状弁体１３を前記開口１
０ａ側の弁座１５へ密接させた構造のチエツク弁
１２が内挿されている。１６は移動プレート６下
面の、ストツパ９の端縁９′との接触部に固着し
たパツキンである。 Next, an embodiment of the present invention shown in FIGS. 1 and 2 will be explained, focusing on the differences from the conventional structure shown in FIGS. 3 and 4. In this case, one end opening 10a faces the inner circumferential space 8a of the stopper 9 in the fluid chamber 8 on the inner circumference of the bellows 5, and the other end opening 10b faces the outer circumferential side space 8b of the stopper 9. The valve chamber 11 formed in the middle of the communication hole 10 has a spherical valve body 13 inserted into the opening 1 by means of a spring 14.
A check valve 12 is inserted into the valve seat 15 on the 0a side and has a structure in close contact with the valve seat 15. Reference numeral 16 denotes a gasket fixed to the lower surface of the moving plate 6 at the contact portion with the end edge 9' of the stopper 9.

上記構成において、第１図の状態から流体室８
のライン圧P2が低下してゆくと、ベローズ５が
収縮し、第２図に示すように、やがて移動プレー
ト６の下面のパツキン１６が前記端縁９′と密接
する。この時点で、ストツパ９の内周側空間８ａ
のライン圧P2、外周側空間８ｂの圧力P3、ベロ
ーズ５外周のガス室７の圧力P1は略同等であり、
その後ライン圧P2がさらに低下しても、ストツ
パ９の両側空間８ａ，８ｂの間はパツキン１６に
よつて完全にシールされているため、空間８ｂの
圧力P3は変わらず、ガス圧P1との差圧によるベ
ローズ５への負荷が発生しない。 In the above configuration, from the state shown in FIG.
As the line pressure P2 decreases, the bellows 5 contracts, and as shown in FIG. 2, the packing 16 on the lower surface of the moving plate 6 eventually comes into close contact with the edge 9'. At this point, the inner peripheral side space 8a of the stopper 9
The line pressure P 2 , the pressure P 3 in the outer space 8b, and the pressure P 1 in the gas chamber 7 on the outer periphery of the bellows 5 are approximately the same.
Even if the line pressure P 2 decreases further thereafter, the gas pressure P 3 in the space 8b remains unchanged because the spaces 8a and 8b on both sides of the stopper 9 are completely sealed by the gasket 16, and the gas pressure P 1 No load is generated on the bellows 5 due to the pressure difference between the bellows 5 and the bellows 5.

万一、何らかの原因によつて、パツキン１６と
ストツパ端縁９′の間から空間８ａ側への漏れが
生じ、P1＞P3となつても、ライン圧P2が上昇し
て圧力P3の値を超えるとその差圧によつてチエ
ツク弁１２の球状弁体１３は開弁し、流通孔１０
を介して両空間８ａ，８ｂは略等圧となる。した
がつてライン圧P2がガス圧P1の値を超える時点
で圧力P3による移動プレート６の吸着状態は起
こらず、ベローズ５が円滑に作動を開始する。 In the unlikely event that for some reason leakage occurs from between the seal 16 and the stopper edge 9' to the space 8a side and P 1 > P 3 , the line pressure P 2 increases and the pressure P 3 When the value exceeds the value, the spherical valve body 13 of the check valve 12 opens due to the differential pressure
Both spaces 8a and 8b have approximately the same pressure through them. Therefore, when the line pressure P 2 exceeds the value of the gas pressure P 1 , the movable plate 6 is not attracted by the pressure P 3 and the bellows 5 starts operating smoothly.

〔考案の効果〕[Effect of idea]

以上述べたように、本考案に係るベローズアキ
ユムレータは、ベローズ内周空間に作用するライ
ン圧が低下しベローズ端部の移動プレートがスト
ツパに密接した状態で、万一ベローズ内周におけ
るストツパ外周側空間の圧力が低下しても、前記
内周側空間のライン圧が上昇したときに、チエツ
ク弁の開弁によつてこれら内・外周側空間が均圧
して移動プレートの吸着が解除されるため、ベロ
ーズの作動応答性が向上するといつた優れた効果
を奏する。 As described above, in the bellows accumulator according to the present invention, if the line pressure acting on the inner circumferential space of the bellows is reduced and the moving plate at the end of the bellows is in close contact with the stopper, the outer circumference of the stopper at the inner circumference of the bellows should Even if the pressure in the side space decreases, when the line pressure in the inner space increases, the pressure in the inner and outer spaces is equalized by opening the check valve, and the adsorption of the moving plate is released. Therefore, excellent effects such as improved operational response of the bellows are achieved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案ベローズアキユムレータの一実
施例におけるベローズ伸長時の縦断面図、第２図
は同じくベローズ収縮時の縦断面図、第３図は従
来のベローズアキユムレータにおけるベローズ伸
長時の縦断面図、第４図は同じくベローズ収縮時
の縦断面図である。 １……ケース、２……端壁、４……連通孔、５
……ベローズ、６……移動プレート、７……ガス
室、８……流体室、８ａ……ストツパの内周側空
間、８ｂ……ストツパの外周側空間、９……スト
ツパ、１０……流通孔、１０ａ，１０ｂ……開
口、１２……チエツク弁。 Fig. 1 is a longitudinal cross-sectional view of an embodiment of the bellows accumulator of the present invention when the bellows are extended, Fig. 2 is a longitudinal cross-sectional view of the bellows when the bellows are contracted, and Fig. 3 is a longitudinal cross-sectional view of a conventional bellows accumulator when the bellows are extended. FIG. 4 is a vertical cross-sectional view when the bellows is contracted. 1... Case, 2... End wall, 4... Communication hole, 5
... Bellows, 6... Moving plate, 7... Gas chamber, 8... Fluid chamber, 8a... Space on the inner peripheral side of the stopper, 8b... Space on the outer peripheral side of the stopper, 9... Stopper, 10... Distribution Hole, 10a, 10b...opening, 12...check valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 連通孔を形成したケースの端壁の内側にパイプ
状のストツパを形成し、該ストツパの外周に一端
を前記端壁に固着するとともに他端を移動プレー
トに固着したベローズを配してなるベローズアキ
ユムレータにおいて、移動プレートに、一端がス
トツパの内周側空間へ臨んで開口し他端がベロー
ズ内周におけるストツパの外周側空間へ臨んで開
口する流通路を設け、該流通路内に、前記外周側
空間より内周側空間が高圧となつたときに開弁す
るチエツク弁を設けたことを特徴とするベローズ
アキユムレータ。 A bellows opening is provided in which a pipe-shaped stopper is formed inside an end wall of a case in which a communication hole is formed, and a bellows is arranged around the outer periphery of the stopper, one end of which is fixed to the end wall and the other end of which is fixed to a moving plate. In the humulator, the movable plate is provided with a flow passage whose one end opens toward the inner circumferential space of the stopper and whose other end opens toward the outer circumferential space of the stopper on the inner circumference of the bellows; A bellows accumulator characterized by being provided with a check valve that opens when the inner space has a higher pressure than the outer space.
JP10703887U 1987-07-14 1987-07-14 Expired JPH0417846Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10703887U JPH0417846Y2 (en) 1987-07-14 1987-07-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10703887U JPH0417846Y2 (en) 1987-07-14 1987-07-14

Publications (2)

Publication Number Publication Date
JPS6415802U JPS6415802U (en) 1989-01-26
JPH0417846Y2 true JPH0417846Y2 (en) 1992-04-21

Family

ID=31341087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10703887U Expired JPH0417846Y2 (en) 1987-07-14 1987-07-14

Country Status (1)

Country Link
JP (1) JPH0417846Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100178182A1 (en) * 2009-01-09 2010-07-15 Simmons Tom M Helical bellows, pump including same and method of bellows fabrication

Also Published As

Publication number Publication date
JPS6415802U (en) 1989-01-26

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