JPS6047479B2 - Multiple reciprocating pump - Google Patents
Multiple reciprocating pumpInfo
- Publication number
- JPS6047479B2 JPS6047479B2 JP54120480A JP12048079A JPS6047479B2 JP S6047479 B2 JPS6047479 B2 JP S6047479B2 JP 54120480 A JP54120480 A JP 54120480A JP 12048079 A JP12048079 A JP 12048079A JP S6047479 B2 JPS6047479 B2 JP S6047479B2
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- suction
- valve seat
- passage
- control valve
- 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
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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/102—Disc valves
- F04B53/103—Flat-annular type disc valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Compressor (AREA)
- Reciprocating Pumps (AREA)
- Safety Valves (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は多連式往復動ポンプ、詳しくは、複数の並列
するシリンダ室をもつシリンダの前記各シ目ノンダ室に
、プランジャを往復動自由に支持し、かつ前記シリンダ
の先端に設けるシリンダヘッドに、吸込孔と吸込弁座面
とをもつた吸込弁座と、前記吸込弁座面に衝合して前記
吸込孔を開閉する吸込弁体とを備えた吸込用弁装置と、
吐出孔と吐出弁座面とをもつた吐出弁座と、前記吐出弁
座面に衝合して前記吐出孔を開閉する吐出弁体とを備え
た吐出用弁装置とを前記各シリンダ室に対応してそれぞ
れ前記各吸込孔及び吐出孔が各シリンダ室に連通する如
く設けると共に、前記シリンダヘッドに、前記各吸込孔
の入口側に位置し、これら各吸込孔に連通する連通吸込
通路と、前記各吐出孔の出口側に位置し、前記吐出弁体
を介して前記各吐出孔に連通する連通吐出通路とを設け
て、前記各プランジャの往復動により前記各吸込弁体及
び前記吐出弁体を作動させる如く成した多連式往復動ポ
ンプに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a multiple reciprocating pump, in particular, a cylinder having a plurality of parallel cylinder chambers, in which a plunger is freely reciprocated in each seam chamber. a suction valve seat supported on the cylinder head and provided at the tip of the cylinder, the suction valve seat having a suction hole and a suction valve seat surface; and a suction valve element that abuts against the suction valve seat surface to open and close the suction hole. a suction valve device comprising;
A discharge valve device including a discharge valve seat having a discharge hole and a discharge valve seat surface, and a discharge valve body that abuts against the discharge valve seat surface to open and close the discharge hole is provided in each of the cylinder chambers. Correspondingly, each of the suction holes and the discharge hole is provided so as to communicate with each cylinder chamber, and a communicating suction passage located on the inlet side of each of the suction holes and communicating with each of the suction holes is provided in the cylinder head; A communicating discharge passage is provided on the outlet side of each of the discharge holes and communicates with each of the discharge holes via the discharge valve body, and the reciprocating movement of each of the plungers causes the suction valve body and the discharge valve body to be connected to each other. This invention relates to a multiple reciprocating pump configured to operate.
（従来の技術）
一般に此種ポンプには、前記吐出通路を流通する液体の
圧力を制御する圧力制御弁をもち、この制御弁の弁座へ
の押圧力を、前記吐出通路を流れる液体の最高圧力より
高く設定し、前記吐出通路に連通する送液通路の出口近
くに設けられた仕切弁などが閉塞されて前記吐出通路内
が過負荷となつたとき、前記制御弁を瞬間的に作動させ
て前記吐出通路内の液体圧力を低下する如くした所謂ア
ンローダバルブと称される制御弁装置が設けられている
。(Prior Art) Generally, this type of pump has a pressure control valve that controls the pressure of the liquid flowing through the discharge passage, and the pressure applied to the valve seat of the control valve is set to the maximum pressure of the liquid flowing through the discharge passage. The control valve is set higher than the pressure, and when a gate valve or the like provided near the outlet of a liquid feeding passage communicating with the discharge passage is blocked and the inside of the discharge passage becomes overloaded, the control valve is instantaneously activated. A control valve device called a so-called unloader valve is provided to reduce the liquid pressure in the discharge passage.
所が従来の制御弁装置は、弁箱内に弁座と圧力、制御弁
とを支持して、前記制御弁を制御はねにより前記弁座に
押圧する一方、前記弁箱に、前記制御はねを収容するは
ね筒を取付けると共に、前記制御弁を瞬間的に作動させ
る絞り弁を設けているため構造が複雑で、部品点数を多
く要し、その結！果組立てが煩雑であるはかりか、コス
ト高となり、更に大形化すると共に重量増となるなどの
欠点があつた。However, in conventional control valve devices, a valve seat, a pressure control valve, and a control valve are supported in a valve box, and the control valve is pressed against the valve seat by a control spring. In addition to installing a spring tube that accommodates the spring, there is also a throttle valve that instantaneously operates the control valve, making the structure complex and requiring a large number of parts. The scales have drawbacks such as complicated assembly, high cost, and increased size and weight.
（発明が解決しようとする問題点）
本発明は、従来技術において制御弁装置によつ５て構造
が複雑化する問題点を解決しようとするもので、シリン
ダ室数に対応して設ける吸込用弁装置と吐出用弁装置と
における各吸込弁座及び各吐出弁座のうち、一つの弁座
と、前記各吐出用弁装置の吐出孔と連通する連通吐出通
路と圧力制御弁１とシリンダとを利用することによつて
、前記吐出通路内が過負荷となつたとき、該吐出通路内
の液体を直ちにアンロードさせることができながら、し
かも構造を簡単にできるようにしたものである。(Problems to be Solved by the Invention) The present invention attempts to solve the problem in the prior art that the structure of the control valve device becomes complicated due to the number of cylinder chambers. One valve seat among each suction valve seat and each discharge valve seat in the valve device and the discharge valve device, a communicating discharge passage communicating with the discharge hole of each of the discharge valve devices, the pressure control valve 1, and the cylinder. By utilizing this, when the inside of the discharge passage becomes overloaded, the liquid in the discharge passage can be immediately unloaded, and the structure can be simplified.
（問題点を解決するための手段）
しかして、本発明は、複数の並列するシリンダ室をもつ
シリンダの前記各シリンダ室に、プランジャを往復動自
由に支持し、かつ前記シリンダの先端に設けるシリンダ
ヘッドに、吸込孔と吸込弁座面とをもつた吸込弁座と、
前記吸込弁座面に衝合して前記吸込孔を開閉する吸込弁
体とを備えた吸込用弁装置と、吐出孔と吐出弁座面とを
もつた）吐出弁座と、前記吐出弁座面に衝合して前記吐
出孔を開閉する吐出弁体とを備えた吐出用弁装置とを前
記各シリンダ室に対応してそれぞれ前記各吸込孔及び吐
出孔が各シリンダ室に連通する如く設けると共に、前記
シリンダヘッドに、前記各吸込・孔の入口側に位置し、
これら各吸込孔に連通する連通吸込通路と、前記各吐出
孔の出口側に位置し、前記吐出弁体を介して前記各吐出
孔に連通する連通吐出通路とを設けて、前記各プランジ
ャの往復動により前記各吸込弁体及び前記吐出弁体を作
動させる如く成した多連式往復動ポンプにおいて、前記
各吸込弁座及び前記各吐出弁座のうち、一つの弁座に、
該弁座の弁座面に衝合する前記弁体の移動方向と同方向
に立上り前記連通吐出通路に突入する立上部を設けて、
該立上部の端面に制御弁座面を設けると共に、前記シリ
ンダヘッドにおける前記連通吐出通路と連通吸込通路と
の間に、貫通孔を設けて、この貫通孔に、筒状を呈し、
端面に前記制御弁座面と衝合する衝合面と、前記制御弁
座面の外径より大径の受圧面とを設け、中心部に前記衝
合面を貫通して前記連通吸込通路を含む低圧側に常時開
口する連通路を設けた一つの圧力制御弁を前記制御弁座
面に対し近接離反可能に支持して、該圧力制御弁を、圧
力調整体をもつた制御ばねにより、前記制御弁座面に押
圧して、前記衝合面を前記制御弁座面に衝合させ、前記
連通路を連通吐出通路に対し閉鎖させると共に、前記圧
力制御弁の前記制御はねに対抗する移動により前記衝合
面を前記制御弁座面に対し離反させて前記連通吐出通路
を、前記連通路を介して前記低圧側に連通させる如く成
す一方、前記貫通孔の前記連通吸込通路側内周面に、該
貫通孔より大径の内腔部を設けると共に、前記圧力制御
弁に、前記受圧面の外径より大径で、かつ前記内腔部の
内周面に対接する径大部を設けて、この径大部と前記内
腔部との間に蓄圧室を設け、かつ前記連通吐出通路の出
口に連通する送液通路の途中に逆止弁を介装し、この逆
止弁の出口則送液通路にバイパス通路を設けて、該バイ
パス通路を前記蓄圧室に連通させたものである。(Means for Solving the Problems) Accordingly, the present invention provides a cylinder having a plurality of cylinder chambers arranged in parallel, in which a plunger is supported in each of the cylinder chambers so as to freely reciprocate, and which is provided at the tip of the cylinder. a suction valve seat having a suction hole and a suction valve seat surface in the head;
a suction valve device comprising a suction valve body that opens and closes the suction hole by abutting against the suction valve seat; a discharge valve seat having a discharge hole and a discharge valve seat; and the discharge valve seat. A discharge valve device including a discharge valve body that opens and closes the discharge hole in abutment with a surface is provided corresponding to each cylinder chamber so that each of the suction holes and the discharge hole communicates with each cylinder chamber. and located on the inlet side of each suction/hole in the cylinder head,
A communicating suction passage communicating with each of the suction holes and a communicating discharge passage located on the outlet side of each of the discharge holes and communicating with each of the discharge holes via the discharge valve body are provided so that each of the plungers can reciprocate. In the multiple reciprocating pump configured to operate each of the suction valve bodies and the discharge valve body by motion, one of the suction valve seats and the discharge valve seats,
providing a rising portion that rises in the same direction as the moving direction of the valve body that abuts against the valve seat surface of the valve seat and plunges into the communicating discharge passage;
A control valve seat surface is provided on an end surface of the upright portion, and a through hole is provided between the communicating discharge passage and the communicating suction passage in the cylinder head, and the through hole has a cylindrical shape,
An abutting surface that abuts with the control valve seat surface and a pressure receiving surface having a larger diameter than the outer diameter of the control valve seat surface are provided on the end surface, and the communicating suction passage is provided in the center part through the abutting surface. One pressure control valve provided with a communication passage that is always open on the low pressure side containing the pressure control valve is supported so as to be able to approach and separate from the control valve seat surface, and the pressure control valve is connected to the pressure control valve by a control spring having a pressure regulating body. pressing against a control valve seat surface to cause the abutting surface to abut against the control valve seat surface, closing the communication passage to the communication discharge passage, and moving the pressure control valve against the control spring; The abutment surface is separated from the control valve seat surface so that the communication discharge passage is communicated with the low pressure side via the communication passage, while the inner circumferential surface of the through hole on the side of the communication suction passage an inner cavity portion having a larger diameter than the through hole; and the pressure control valve is provided with a large diameter portion having a diameter larger than the outer diameter of the pressure receiving surface and in contact with an inner circumferential surface of the inner cavity portion. A pressure accumulation chamber is provided between the large-diameter portion and the inner cavity, and a check valve is interposed in the middle of the liquid feeding passage communicating with the outlet of the communication discharge passage, and the outlet of the check valve is A bypass passage is provided in the normal liquid feeding passage, and the bypass passage is communicated with the pressure accumulation chamber.
（作 用）
プランジャの往復動により各吸込用弁装置の吸込弁体及
び各吐出用弁装置の吐出弁体を作動させて連通吐出通路
に加圧液を吐出し、この吐出通路の液体圧を一つの圧力
制御弁で制御する一方、前記吐出通路内が過負荷となつ
た場合、前記制御弁の径大部に、前記受圧面に加わる押
上刃より大きい押上刃を作用させて、前記制御弁を開き
、前記吐出通路の加圧液体を前記連通路を介して低圧側
に逃し、前記吐出通路を低圧にするのである。(Function) The reciprocating motion of the plunger operates the suction valve body of each suction valve device and the discharge valve body of each discharge valve device to discharge pressurized liquid into the communicating discharge passage, and reduce the liquid pressure in this discharge passage. While controlling with one pressure control valve, if the inside of the discharge passage becomes overloaded, a push-up blade larger than the push-up blade applied to the pressure-receiving surface is applied to the large diameter portion of the control valve, and the pressure control valve is controlled. is opened, the pressurized liquid in the discharge passage is released to the low pressure side through the communication passage, and the pressure in the discharge passage is made low.
（実施例）以下本発明ポンプの実施例を図面に基づいて
説明する。(Example) Examples of the pump of the present invention will be described below based on the drawings.
第１，２図に示したものは三連式往復動ポンプてあるが
、その他、二連式又は四連式以上の往復動ポンプであつ
てもよい。しかして第１，２図において１はハウジング
、２はこのハウジング１に軸受３，３を介して回転自由
に支持する出力軸て、この出力軸２には偏心軸孔４ａを
もつ筒状のカム体４が取付けられている。Although the pump shown in FIGS. 1 and 2 is a three-barreled reciprocating pump, other reciprocating pumps of two-barrel type, four-barrel type or more may also be used. In FIGS. 1 and 2, 1 is a housing, 2 is an output shaft rotatably supported in the housing 1 via bearings 3, 3, and the output shaft 2 has a cylindrical cam having an eccentric shaft hole 4a. A body 4 is attached.
又５は３つの並列するシリンダ室５ａをもつシリンダで
、前記ハウジング１に取付けるのである。Further, 5 is a cylinder having three parallel cylinder chambers 5a, which is attached to the housing 1.
又、このシリンダ５の各シリンダ室５ａには前記カム体
４にロッド６を介して取付ける３個のプランジャ７が往
復動自由に支持されていると共に、これらプランジャ７
の外周と前記各シリンダ室５ａとの間に、シール部材５
１と該シール部材５１を支持するシール受５２及び前記
シール部材５１を前記シール受５２に押圧するスプリン
グ５３とが設けられている。又、前記シリンダ５の先端
には、シリンダヘッド８を設けて、このシリンダヘッド
８に、吸込孔２１ａと吸込弁座面２１ｂとをもつた吸込
弁座２１と、前記吸込弁座面２１ｂに衝合して前記吸込
孔２１ａを開閉する吸込弁体２２とを備えた吸込用弁装
置２０と、吐出孔２１ａと吐出弁座面３１ｂとをもつた
吐出弁座３１と、前記吐出弁座面３１ｂに衝合して前記
吐出孔３１ａを開閉する吐出弁体３２とを備えた吐出用
弁装置３０とを前記各シリンダ室５ａに対応してそれぞ
れ前記各吸込孔２１ａ及び吐出孔３１ａが各シリンダ室
５ａに連通する如く設けると共に、前記シリンダヘッド
８に、前記各吸込孔２１ａの入口側に位置し、これら各
吸込孔２１ａに連通する連通吸込通路８１と、前記各吐
出孔３１ａの出口側に位置し、前記吐出弁体３２を介し
て前記各吐出孔３１ａに連通する連通吐出通路８２とを
設けている。尚、前記シリンダ５は、取付ボルト（図示
せず）の前記ハウジング１への取付けにより前記ハウジ
ング１とシリンダヘッド８との間で挾着するのである。
又、前記吸込用弁装置２０は、中心部に吸込孔２１ａを
もつた前記吸込弁座２１と、前記吐出弁体２２と、この
吐出弁体２２を前記吸込弁座２１の吸込弁座面２１ｂに
押圧する第１ばね２３とから成り、又、前記吐出用弁装
置３０は、多数の貫通孔から成る吐出孔３１ａをもつた
前記吐出弁座３１と、前記吐出弁体３２と、この吐出弁
体３２を前記吐出弁座３１の吐出弁座面３１ｂに押圧す
る第２ばね３３とから成るものてあつて、前記吸込弁座
２１の外周に前記吐出弁座３１を一体に形成して、前記
吐出弁座３１の外周部分を前記シリンダ５の先端面と前
記シリンダヘッド８との間に介装して、前記シリング５
の固定により挟着すると共に、前記吸込弁座面２１ｂ及
び吸込弁体２２を前記シリンダ室５ａ内に位置させ、ま
た前記吐出弁座面３１ｂ及び吐出弁体３２を前記吐出通
路ノ８２内に位置させて、前記吸込弁体２２を第１ばね
２３により吸込弁座面２１ｂに押圧し、また吐出弁体３
２を第２はね３３により吐出弁座面３１ｂに押圧するの
である。Further, in each cylinder chamber 5a of this cylinder 5, three plungers 7 which are attached to the cam body 4 via rods 6 are supported in a freely reciprocating manner.
A sealing member 5 is provided between the outer periphery of the cylinder chamber 5a and each cylinder chamber 5a.
1, a seal receiver 52 that supports the seal member 51, and a spring 53 that presses the seal member 51 against the seal receiver 52. Further, a cylinder head 8 is provided at the tip of the cylinder 5, and the cylinder head 8 includes a suction valve seat 21 having a suction hole 21a and a suction valve seat surface 21b, and a suction valve seat 21 having an impact on the suction valve seat surface 21b. A suction valve device 20 including a suction valve body 22 that opens and closes the suction hole 21a, a discharge valve seat 31 having a discharge hole 21a and a discharge valve seat surface 31b, and the discharge valve seat surface 31b. A discharge valve device 30 is provided with a discharge valve body 32 that opens and closes the discharge hole 31a in abutment with the cylinder chamber 5a. 5a, and in the cylinder head 8, a communicating suction passage 81 located on the inlet side of each of the suction holes 21a and communicating with each of the suction holes 21a, and a communicating suction passage 81 located on the outlet side of each of the discharge holes 31a. A communicating discharge passage 82 is provided which communicates with each of the discharge holes 31a via the discharge valve body 32. The cylinder 5 is clamped between the housing 1 and the cylinder head 8 by attaching a mounting bolt (not shown) to the housing 1.
The suction valve device 20 also includes the suction valve seat 21 having a suction hole 21a in the center, the discharge valve body 22, and the discharge valve body 22 connected to the suction valve seat surface 21b of the suction valve seat 21. The discharge valve device 30 includes the discharge valve seat 31 having a discharge hole 31a consisting of a large number of through holes, the discharge valve body 32, and the discharge valve device 30. a second spring 33 for pressing the body 32 against the discharge valve seat surface 31b of the discharge valve seat 31; The outer peripheral portion of the discharge valve seat 31 is interposed between the distal end surface of the cylinder 5 and the cylinder head 8, and the cylinder 5
At the same time, the suction valve seat surface 21b and the suction valve body 22 are positioned in the cylinder chamber 5a, and the discharge valve seat surface 31b and the discharge valve body 32 are positioned in the discharge passageway 82. Then, the suction valve body 22 is pressed against the suction valve seat surface 21b by the first spring 23, and the discharge valve body 3 is pressed against the suction valve seat surface 21b.
2 is pressed against the discharge valve seat surface 31b by the second spring 33.
又、前記三つの吸込弁座２１のうち、三つの吸込弁座２
１に、前記吸込孔一２１ａ周りから前記吸込弁座面２１
ｂと反対方向に突出する筒状部２１ｃを設けている。又
、前記シリンダヘッド８の連通吸込通路８１と連通吐出
通路８２との間に貫通孔８３，８４，８５を設け、これ
ら貫通孔のうち二つの貫通孔８７３，８４に、前記二つ
の吸込弁座２１に設けた筒状部２１ｃの遊端を挿嵌し、
前記二つの吸込弁座２１の吸込孔２１ａを連通吸込通路
８１に連通させるのである。Furthermore, among the three suction valve seats 21, three suction valve seats 2
1, from around the suction hole 21a to the suction valve seat surface 21.
A cylindrical portion 21c protruding in the direction opposite to b is provided. Further, through holes 83, 84, 85 are provided between the communicating suction passage 81 and the communicating discharge passage 82 of the cylinder head 8, and two of the through holes 873, 84 are provided with the two suction valve seats. Insert the free end of the cylindrical part 21c provided in 21,
The suction holes 21a of the two suction valve seats 21 are communicated with the communication suction passage 81.
しかして、前記三つの吸込弁座２１のうち、残りの一の
吸込弁座２１に、前記吸込弁座面２１ｂと反対側端面で
、かつ前記吸込孔２１ａ周りから前記吸込弁体２２の移
動方向と同方向に立上がる立上部２４を設け、この立上
部２４を前記吐出通路８２に突入させると共に、前記立
上部２４の端面に制御弁座面２５を設ける一方、前記三
つの貫通孔８３，８４，８５のうち、残ソーつの貫通孔
８５に、筒状を呈し、端面に前記制御弁座面２５と衝合
する衝合面４１と、前記制御弁座面２５の外径より大径
で、前記吐出通路８２の液体圧を受ける受圧面４２とを
設け、中心部に前記衝合面４１を貫通して前記吸込通路
８１を含む低圧側に常時開口する連通路４３を設けた一
つの圧力制御弁４０を前記制御弁座面２５に対し近接離
反可能に支持して、該圧力制御弁４０を、制御ばね９に
より、前記制御弁座面２５に押圧して、前記衝合面４１
を制御弁座面２５に衝合させ、前記連通路４３を連通吐
出通路８２に対し閉鎖させると共に、前記圧力制御弁４
０の前記制御はね９に対抗する移動により前記衝合面４
１を前記制御弁座面２５に対し離反させて前記連通吐出
通路８２を、前記連通路４３を介して前記吸込通路８１
に連通させる如く成す一方、前記貫通孔８５の前記連通
吸込通路８１側内周面に、該貫通孔８５より大径の内腔
部８６を設けると共に、前記圧力制御弁４０に、前記受
圧面４２の外径より大径で、かつ前記内腔部８６の内周
面に対接する径大部４４を設けて、この径大部４４と前
記内腔部８６との間に蓄圧室８７を設け、かつ前記連通
吐出通路８２の出口に連通する送液通路１０の途中に逆
止弁１１を．介装して加圧液体の前記吐出通路８２への
逆流を阻止する如く成すと共に、この逆止弁１１の出口
側送液通路１０にバイパス通路１２を設けて、該バイパ
ス通路１２を前記蓄圧室８７に連通させるのである。Therefore, from among the three suction valve seats 21, the remaining one suction valve seat 21 is placed on the end surface opposite to the suction valve seat surface 21b and from around the suction hole 21a in the moving direction of the suction valve body 22. A rising part 24 is provided that rises in the same direction as the rising part 24, and this rising part 24 projects into the discharge passage 82, and a control valve seat surface 25 is provided on the end face of the rising part 24, while the three through holes 83, 84 , 85, the remaining one through hole 85 has a cylindrical shape, and an abutment surface 41 that abuts the control valve seat surface 25 on the end surface, and a contact surface 41 having a larger diameter than the outer diameter of the control valve seat surface 25, A pressure receiving surface 42 that receives the liquid pressure of the discharge passage 82 is provided, and a communication passage 43 that penetrates the abutment surface 41 and is always open to the low pressure side including the suction passage 81 is provided in the center. The valve 40 is supported so as to be movable toward and away from the control valve seat surface 25, and the pressure control valve 40 is pressed against the control valve seat surface 25 by the control spring 9, and the abutment surface 41
is brought into contact with the control valve seat surface 25 to close the communication passage 43 to the communication discharge passage 82, and the pressure control valve 4
0 by the movement of said control spring 9 against said abutment surface 4
1 away from the control valve seat surface 25 to connect the communication discharge passage 82 to the suction passage 81 via the communication passage 43.
At the same time, a bore portion 86 having a larger diameter than the through hole 85 is provided on the inner circumferential surface of the through hole 85 on the side of the communicating suction passage 81, and the pressure control valve 40 has A large-diameter portion 44 having a diameter larger than the outer diameter of the lumen portion 86 and in contact with the inner circumferential surface of the lumen portion 86 is provided, and a pressure accumulation chamber 87 is provided between the large-diameter portion 44 and the lumen portion 86; In addition, a check valve 11 is installed in the middle of the liquid feeding passage 10 that communicates with the outlet of the communication discharge passage 82. A bypass passage 12 is provided in the liquid feeding passage 10 on the outlet side of the check valve 11 to prevent the pressurized liquid from flowing back into the discharge passage 82. 87.
尚、前記制御弁４０は、例えば前記吸込弁座２１におけ
る制御弁座面２５の外径より大きい有底筒状に形成して
、その底面外周部に、前記衝合面４１及び受圧面４２を
設けると共に、前記底面の中央部に貫通孔を設けて、該
貫通孔を前記連通路Ｔ４３とすると共に、筒状部中間に
、径方向外方に向つて延びる環状の前記径大部４４を設
けるのである。The control valve 40 is formed into a cylindrical shape with a bottom that is larger than the outer diameter of the control valve seat surface 25 of the suction valve seat 21, and the abutment surface 41 and the pressure receiving surface 42 are formed on the outer circumference of the bottom surface. At the same time, a through hole is provided in the center of the bottom surface, and the through hole is used as the communication path T43, and the annular large diameter portion 44 extending radially outward is provided in the middle of the cylindrical portion. It is.
又、前記シリンダヘッド８には、圧力調整体１３を移動
可能に取付けて、この調整体１３と前記制御ばね９との
間に、液体導入孔１４ａをもつたばね押え１４を介装し
、前記調整体１３の操作により前記制御ばね９を弾性変
形させて前記制御弁４０の制御弁座面２５への押圧力を
調整し、圧力制御弁４０の受圧面４２に加わる液体圧力
を制御することにより前記吐出通路８２の液体圧力を設
定する如く成している。Further, a pressure regulating body 13 is movably attached to the cylinder head 8, and a spring retainer 14 having a liquid introduction hole 14a is interposed between the regulating body 13 and the control spring 9. By operating the body 13, the control spring 9 is elastically deformed to adjust the pressing force of the control valve 40 against the control valve seat surface 25, and to control the liquid pressure applied to the pressure receiving surface 42 of the pressure control valve 40. The liquid pressure in the discharge passage 82 is set.
しかして、出力軸２の回転により、プランジャ７７を往
復動すると、先ずその復動時に吐出弁体３２が閉じると
共に吸込弁体２２が開いて、タンクなどに貯蔵された液
体が、連通吸込通路８１の入口から該吸込通路８１．液
体導入孔１４ａ、制御ばね９の中心部通路、連通路４３
及び吸込孔２１）ａを経てシリンダ室５ａに吸込まれ、
またプランジャ７の往動時に吸込弁体２２が閉じると共
に吐出弁体３２が開いて、前記シリンダ室５ａの液体が
加圧されて連通吐出通路８２に吐出されるのである。When the plunger 77 reciprocates due to the rotation of the output shaft 2, the discharge valve body 32 closes and the suction valve body 22 opens during the reciprocating movement, and the liquid stored in the tank or the like is transferred to the communication suction passage 81. from the inlet of the suction passage 81. Liquid introduction hole 14a, center passage of control spring 9, communication passage 43
and is sucked into the cylinder chamber 5a through the suction hole 21)a,
Further, when the plunger 7 moves forward, the suction valve body 22 closes and the discharge valve body 32 opens, so that the liquid in the cylinder chamber 5a is pressurized and discharged into the communication discharge passage 82.
そしてこの吐出通路８２に吐出された液体・は、前記制
御弁４０の制御弁座面２５への押圧により設定された圧
力に制御されて、連通吐出通路８２の出口から送液通路
１０に放出されるのである。又、前記送液通路１０の出
口近くに設けられた仕切弁１５などが閉塞されると、連
通吐出通路８２と送液通路１０及び蓄圧室８７とが高圧
になり、圧力制御弁４０の径大部４４に、受圧面４２に
作用する押上刃より大きい押上刃が作用し、この径大部
４４に作用する押上刃により前記制御弁４０が瞬間的に
開いて、連通吐出通路８２が、連通路４３及び連通吸込
通路８１と連通し、前記吐出通路８２の加圧液体は低圧
になるのてある。又蓄圧室８７の液体は、逆止弁１１と
前記仕切弁１５などの閉塞とにより蓄圧され高圧になつ
ており、前記制御弁４０の開状態が維持されているので
ある。そしてこの制御弁４０が開いている間は、前記吐
出通路８２の液体は低圧になつている。次に前記仕切弁
１５などが開かれると、前記蓄圧室８７の液体圧力が低
下して、前記制御弁４０が制御ばね９により押圧されて
閉じ、シリンダ室５ａから連通吐出通路８２に吐出され
た液体が高圧となり送液通路１０に圧送されるのてある
。尚、以上の実施例ては、吐出用弁装置３０における各
吐出弁座３１を、吸込用弁装置２０における吸込弁座２
１と一体に形成し、これら吸込弁座２１のうち、一の吸
込弁座２１に、前記制御弁４０と衝合する制御弁座面２
５を設けたものについて説明したが、その他、前記各吸
込弁座２１と各吐出弁座３１とを別個に形成して、これ
ら各吸込弁座２１及び各吐出弁座３１のうち、一つの吸
込。弁座２１に、前記制御弁４０と衝合する制御弁座面
２５を設けてもよいし、又、一つの吐出弁座３１に、前
記制御弁４０と衝合する前記制御弁座面２５を設けても
よい。前記制御弁座面２５を、吸込弁体２２のみを受止
める吸込用弁装置２０における吸込弁座２１の一つに設
ける場合は、例えば第２図に示す如く、前記吸込通路８
１と前記吐出通路８２及び前記一つの貫通孔８５を備え
た前記シリンダヘッド８に、吸込用弁装置２０と吐出用
弁装置３０とを、前記プランジャ７の中心と直交する方
向に並列に設けて、前記吸込用弁装置２０を、前記プラ
ンジャ７の往復方向前方に配置し、また吐出用弁装置３
０を、前記プランジャ７の中心に対し半径方向外方向に
変位した位置に配置すると共に、前記シリンダ５に、前
記シリンダ室５ａから前記吐出用弁装置３０における吐
出孔３１ａの入口側に開口するバイパス路５４を設ける
一方、前記吸込用弁装置２０における一つの吸込弁座２
１に、前記吐出通路８２に突入し、端面に制御弁座面２
５をもつた前記立上部２４を設けると共に、前記一つの
貫通孔８５に、前記衝合面４１と受圧面４２及び連通路
４３をもつた前記制御弁４０を前記制御弁座面２５に対
し近接離反可能に支持し、該制御弁４０を前記制御はね
９により前記制御弁座面２５に押圧して、前記連通路４
３を前記吐出通路８２に対し閉鎖させ、前記制御弁４０
の前記制御はね９に対抗する移動により前記吐出通路８
２を、前記連通路４３を介して前記吸込通路８１に連通
させる如く成し、かつ前記貫通孔８５に、前記内腔部８
６を、また前記制御弁４０に前記径大部４４を設けて、
これら径大部４４と内腔部８６との間に前記蓄圧室８７
を設けるのである。The liquid discharged into the discharge passage 82 is controlled to a pressure set by the pressure of the control valve 40 against the control valve seat surface 25, and is discharged from the outlet of the communication discharge passage 82 into the liquid feeding passage 10. It is. Further, when the gate valve 15 provided near the outlet of the liquid feeding passage 10 is closed, the communication discharge passage 82, the liquid feeding passage 10, and the pressure accumulation chamber 87 become high pressure, and the diameter of the pressure control valve 40 increases. A push-up blade larger than the push-up blade acting on the pressure-receiving surface 42 acts on the portion 44, and the control valve 40 is momentarily opened by the push-up blade acting on the large diameter portion 44, so that the communicating discharge passage 82 becomes a communicating passage. 43 and a communicating suction passage 81, and the pressurized liquid in the discharge passage 82 is at a low pressure. Further, the liquid in the pressure accumulating chamber 87 is accumulated and has a high pressure due to the check valve 11 and the closure of the gate valve 15, etc., and the control valve 40 is maintained in the open state. While the control valve 40 is open, the liquid in the discharge passage 82 is at a low pressure. Next, when the gate valve 15 and the like are opened, the liquid pressure in the pressure accumulation chamber 87 decreases, the control valve 40 is pressed by the control spring 9 and closed, and the liquid is discharged from the cylinder chamber 5a to the communication discharge passage 82. The liquid becomes high pressure and is forced into the liquid sending passage 10. In addition, in the above embodiment, each discharge valve seat 31 in the discharge valve device 30 is replaced with the suction valve seat 2 in the suction valve device 20.
1, and among these suction valve seats 21, one of the suction valve seats 21 has a control valve seat surface 2 that abuts against the control valve 40.
In addition, each suction valve seat 21 and each discharge valve seat 31 may be formed separately, and one of the suction valve seats 21 and each discharge valve seat 31 may be . The valve seat 21 may be provided with a control valve seat surface 25 that abuts the control valve 40, or one discharge valve seat 31 may be provided with the control valve seat surface 25 that abuts the control valve 40. It may be provided. When the control valve seat surface 25 is provided on one of the suction valve seats 21 in the suction valve device 20 that receives only the suction valve body 22, for example, as shown in FIG.
1, the discharge passage 82, and the one through hole 85, a suction valve device 20 and a discharge valve device 30 are provided in parallel in a direction perpendicular to the center of the plunger 7. , the suction valve device 20 is arranged in front of the plunger 7 in the reciprocating direction, and the discharge valve device 3 is disposed in front of the plunger 7 in the reciprocating direction.
0 is disposed at a position displaced radially outward with respect to the center of the plunger 7, and a bypass is provided in the cylinder 5 that opens from the cylinder chamber 5a to the inlet side of the discharge hole 31a in the discharge valve device 30. one suction valve seat 2 in the suction valve device 20;
1, it enters the discharge passage 82 and has a control valve seat surface 2 on the end surface.
5, and the control valve 40 having the abutting surface 41, the pressure receiving surface 42, and the communication passage 43 is provided in the one through hole 85 in close proximity to the control valve seat surface 25. The control valve 40 is supported so as to be releasable, and the control valve 40 is pressed against the control valve seat surface 25 by the control spring 9 to open the communication path 4.
3 is closed to the discharge passage 82, and the control valve 40 is closed to the discharge passage 82.
The said control of said discharge passage 8 by movement against the spring 9
2 is configured to communicate with the suction passage 81 via the communication passage 43, and the through hole 85 is provided with the inner cavity 8.
6, and the control valve 40 is provided with the large diameter portion 44,
The pressure accumulation chamber 87 is located between the large diameter portion 44 and the inner cavity 86.
We will set up the following.
尚、この実施例の場合、基本的な構造、及ひ作用は、第
１図に示した実施例のものと同じであるため、詳細につ
いては省略する。前記制御弁座面２５を、吐出弁体３２
のみを受止める吐出用弁装置３０における吐出弁座３１
の一つに設ける場合は、例えば第３図に示す如く、前記
吸込通路８１と前記吐出通路８２及び前記一つの貫通孔
８５を備えた前記シリンダヘッド８に、吸込用弁装置２
０と吐出用弁装置３０とを、前記プランジャ７の中心と
直交する方向に並列に設けて、前記吐出用弁装置３０を
、前記プランジャ７の往復方向前方に配置し、また吸込
用弁装置２０を、前記プランジャ７の中心に対し半径方
向外方向に変位した位置に配置すると共に、前記シリン
ダ５に、前記シリンダ室５ａから前記吸込用弁装置２０
における吸込孔２１ａの出口側に開口するバイパス路５
５を設ける一方、前記吐出用弁装置３０における一つの
吐出弁座３１に、前記吐出通路８２に突入し、端面に制
御弁座面２５をもつた前記立上部２４を設けると共に、
前記一つの貫通孔８５に、前記衝合面４１と受圧面４２
及び連通路４３をもつた前記制御弁４０を前記制御弁座
面２５に対し近接離反可能に支持し、該制御弁４０を前
記制御ばね９により前記制御弁座面２５に押圧して、前
記連通路４３を前記吐出通路８２に対し閉鎖させ、前記
制御弁４０の前記制御ばね９に対抗する移動により前記
吐出通路８２を、前記連通路４３を介して前記吸込通路
８１に連通させる如く成し、かつ前記貫通孔８５に、前
記内腔部８６を、また前記制御弁４０に前記径大部４４
を設けて、これら径大部４４と内腔部８６との間に前記
蓄圧室８７を設けるのである。Incidentally, in the case of this embodiment, the basic structure and operation are the same as those of the embodiment shown in FIG. 1, so the details will be omitted. The control valve seat surface 25 is connected to the discharge valve body 32.
Discharge valve seat 31 in discharge valve device 30 that receives only
For example, as shown in FIG.
0 and a discharge valve device 30 are provided in parallel in a direction perpendicular to the center of the plunger 7, and the discharge valve device 30 is arranged in front of the plunger 7 in the reciprocating direction, and the suction valve device 20 is disposed at a position displaced radially outward with respect to the center of the plunger 7, and the suction valve device 20 is inserted into the cylinder 5 from the cylinder chamber 5a.
A bypass passage 5 that opens on the outlet side of the suction hole 21a in
5, and one discharge valve seat 31 in the discharge valve device 30 is provided with the rising portion 24 that protrudes into the discharge passage 82 and has a control valve seat surface 25 on the end surface,
The one through hole 85 has the abutting surface 41 and the pressure receiving surface 42.
The control valve 40 having a communication passage 43 is supported so as to be movable toward and away from the control valve seat surface 25, and the control valve 40 is pressed against the control valve seat surface 25 by the control spring 9 to close and separate the control valve 40 from the control valve seat surface 25. the passage 43 is closed to the discharge passage 82, and movement of the control valve 40 against the control spring 9 causes the discharge passage 82 to communicate with the suction passage 81 via the communication passage 43; The through hole 85 is provided with the inner cavity 86 and the control valve 40 is provided with the large diameter portion 44.
The pressure accumulating chamber 87 is provided between the large diameter portion 44 and the inner cavity portion 86.
尚、この実施例の場合、基本的な構造、及び作用は、第
１図に示した実施例のものと同じであるため、詳細につ
いては省略する。ノ 又、図中１６はばね受、１７はカ
イト筒、１８はロックナットである。Incidentally, in the case of this embodiment, the basic structure and operation are the same as those of the embodiment shown in FIG. 1, so the details will be omitted. Also, in the figure, 16 is a spring holder, 17 is a kite tube, and 18 is a lock nut.
以上の如く本発明は、複数の並列するシリンダ室をもつ
シリンダの前記各シリンダ室に、プランジャを往復動自
由に支持し、かつ前記シリンダの７先端に設けるシリン
ダヘッドに、吸込孔と吸込弁座面とをもつた吸込弁座と
、前記吸込弁座面に衝合して前記吸込孔を開閉する吸込
弁体とを備えた吸込用弁装置と、吐出孔と吐出弁座面と
をもつた吐出弁座と、前記吐出弁座面に衝合して前記吐
出つ孔を開閉する吐出弁体とを備えた吐出用弁装置とを
前記各シリンダ室に対応してそれぞれ前記各吸込孔及び
吐出孔が各シリンダ室に連通する如く設けると共に、前
記シリンダヘッドに、前記各吸込孔の入口側に位置し、
これら各吸込孔に連通する連通吸込通路と、前記各吐出
孔の出口側に位置し、前記吐出弁体を介して前記各吐出
孔に連通する連通吐出通路とを設けて、前記各プランジ
ャの往復動により前記各吸込弁体及び前記吐出弁体を作
動させる如く成した多連式往復動ポンプにおいて、前記
各吸込弁座及び前記各吐出弁座のうち、一つの弁座に、
該弁座の弁座面に衝合する前記弁体の移動方向と同方向
に立上り前記連通吐出通路に突入する立上部を設けて、
該立上部の端面に制御弁座面を設けると共に、前記シリ
ンダヘッドにおける前記連通吐出通路と連通吸込通路と
の間に、貫通孔を設けて、この貫通孔に、筒状を呈し、
端面に前記制御弁座面と衝合する衝合面と、前記制御弁
座面の外径より大径の受圧面とを設け、中心部に前記衝
合面を貫通して前記連通吸込通路を含む低圧側に常時開
口する連通路を設けた一つの圧力制御弁を前記制御弁座
面に対し近接離反可能に支持して、該圧力制御弁を、圧
力調整体をもつた制御ばねにより、前記制御弁座面に押
圧して、前記衝合面を制御弁座面に衝合させ、前記一連
通路を連通吐出通路に対し閉鎖させると共に、前記圧力
制御弁の前記制御ばねに対抗する移動により前記衝合面
を前記制御弁座面に対し離反させて前記連通吐出通路を
、前記連通路を介して前記低圧則に連通させる如く成す
一方、前記貫通孔の；前記連通吸込通路側内周面に、該
貫通孔より大径の内腔部を設けると共に、前記圧力制御
弁に、前記受圧面の外径より大径で、かつ前記内腔部の
内周面に対接する径大部を設けて、この径大部と前記内
腔部との間に蓄圧室を設け、かつ前記連通吐３出通路の
出口に連通する送液通路の途中に逆止弁を介装し、逆止
弁の出口側送液通路にバイパス通路を設けて、該バイパ
ス通路を前記蓄圧室に連通させたから、吐出通路内が過
負荷となつたとき、蓄圧室内の液体圧により圧力制御弁
を開いて、前記吐出通路内の液体を直ちにアンロードさ
せることができながら、しかも圧力制御弁専用の弁座と
、この弁座を支持する弁箱を不要にすることができるば
かりか、シリンダ室の多少に関係なく、一つの圧力制御
弁と、一つの制御ばねとを設けるだけの非常に簡単な構
造で、過負荷時アンロード”させることができるので、
既存のものに比べて部品点数を大幅に少なくでき、構造
を大幅に簡単にできるのである。As described above, the present invention includes a cylinder having a plurality of parallel cylinder chambers, in which a plunger is freely supported in the cylinder chambers, and a cylinder head provided at seven ends of the cylinder has a suction hole and a suction valve seat. A suction valve device includes a suction valve seat having a surface, a suction valve body that abuts against the suction valve seat surface to open and close the suction hole, and a discharge hole and a discharge valve seat surface. A discharge valve device including a discharge valve seat and a discharge valve body that abuts against the discharge valve seat surface and opens and closes the discharge hole is provided in correspondence with each of the cylinder chambers, respectively, and A hole is provided so as to communicate with each cylinder chamber, and a hole is located in the cylinder head on the inlet side of each suction hole,
A communicating suction passage communicating with each of the suction holes and a communicating discharge passage located on the outlet side of each of the discharge holes and communicating with each of the discharge holes via the discharge valve body are provided so that each of the plungers can reciprocate. In the multiple reciprocating pump configured to operate each of the suction valve bodies and the discharge valve body by motion, one of the suction valve seats and the discharge valve seats,
providing a rising portion that rises in the same direction as the moving direction of the valve body that abuts against the valve seat surface of the valve seat and plunges into the communicating discharge passage;
A control valve seat surface is provided on an end surface of the upright portion, and a through hole is provided between the communicating discharge passage and the communicating suction passage in the cylinder head, and the through hole has a cylindrical shape,
An abutting surface that abuts with the control valve seat surface and a pressure receiving surface having a larger diameter than the outer diameter of the control valve seat surface are provided on the end surface, and the communicating suction passage is provided in the center part through the abutting surface. One pressure control valve provided with a communication passage that is always open on the low pressure side containing the pressure control valve is supported so as to be able to approach and separate from the control valve seat surface, and the pressure control valve is connected to the pressure control valve by a control spring having a pressure regulating body. Pressing against the control valve seat surface causes the abutting surface to abut against the control valve seat surface, closing the continuous passageway to the communicating discharge passageway, and moving the pressure control valve against the control spring causes the The abutment surface is separated from the control valve seat surface so that the communicating discharge passage is communicated with the low pressure law via the communicating passage, while the inner circumferential surface of the through hole on the side of the communicating suction passage , an inner cavity portion having a larger diameter than the through hole is provided, and the pressure control valve is provided with a large diameter portion that has a diameter larger than the outer diameter of the pressure receiving surface and is in contact with an inner circumferential surface of the inner cavity portion. A pressure accumulation chamber is provided between the large-diameter portion and the inner cavity, and a check valve is interposed in the middle of a liquid feeding passage communicating with the outlet of the three communicating discharge passages, and the outlet of the check valve is Since a bypass passage is provided in the side liquid feeding passage and the bypass passage is communicated with the pressure accumulation chamber, when the inside of the discharge passage becomes overloaded, the pressure control valve is opened by the liquid pressure in the pressure accumulation chamber, and the pressure control valve is opened in the discharge passage. Not only can the liquid in the cylinder chamber be unloaded immediately, but also the valve seat dedicated to the pressure control valve and the valve box that supports this valve seat can be eliminated. It has a very simple structure with just two pressure control valves and one control spring, and can be unloaded in the event of overload.
The number of parts can be significantly reduced compared to existing ones, and the structure can be significantly simplified.
その結果、組立てを容易に行なうことができると共に、
コストを大幅に低減でき、更にコンパクトで、かつ軽量
にできるのである。As a result, assembly is easy and
The cost can be significantly reduced, and it can be made more compact and lightweight.
第１図は本発明の一実施例を示す横断面図、第２図及び
第３図は別の実施例を示す要部のみの断面図である。
５・・・・・・シリンダ、５ａ・・・・・・シリンダ室
、７・・・プランジャ、２０・・・・・・吸込用弁装置
、２１・・・・・・吸込弁座、２１ａ・・・・・・吸込
孔、２１ｂ・・・・・・吸込弁座面、２２・・・・・・
吸込弁体、２４・・・・・立上部、２５・・・・・制御
弁座面、３０・・・・・・吐出用弁装置、３１・・・吐
出弁座、３１ａ・・・・・・吐出孔、３１ｂ・・・・・
・吐出弁座面、３２・・・・・・吐出弁体、４０・・・
・・・圧力制御弁、４１・・・・・・衝合面、４２・・
・・・・受圧面、４３・・・・・・連通路、４４・・・
・・・径大部、８・・・・・シリンダヘッド、８１・・
・・・・連通吸込通路、８２・・・・・・連通吐出通路
、８５・・・・・・貫通孔、８６・・・・内腔部、８７
・・・・・・蓄圧室、１０・・・・・・送液通路、１１
・・・・・・逆止弁、１２・・●●●バイパス通路。FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of only essential parts showing other embodiments. 5... Cylinder, 5a... Cylinder chamber, 7... Plunger, 20... Suction valve device, 21... Suction valve seat, 21a. ...Suction hole, 21b...Suction valve seat surface, 22...
Suction valve body, 24... Standing part, 25... Control valve seat surface, 30... Discharge valve device, 31... Discharge valve seat, 31a...・Discharge hole, 31b...
・Discharge valve seat surface, 32...Discharge valve body, 40...
...Pressure control valve, 41...Abutting surface, 42...
...Pressure receiving surface, 43...Communication path, 44...
...Large diameter part, 8...Cylinder head, 81...
...Communication suction passage, 82...Communication discharge passage, 85...Through hole, 86...Inner cavity, 87
... Pressure accumulation chamber, 10 ... Liquid feeding passage, 11
・・・・・・Check valve, 12...●●●Bypass passage.
Claims (1)
シリンダ室に、プランジャを往復動自由に支持し、かつ
前記シリンダの先端に設けるシリンダヘッドに、吸込孔
と吸込弁座面とをもつた吸込弁座と、前記吸込弁座面に
衝合して前記吸込孔を開閉する吸込弁体とを備えた吸込
用弁装置と、吐出孔と吐出弁座面とをもつた吐出弁座と
、前記吐出弁座面に衝合して前記吐出孔を開閉する吐出
弁体とを備えた吐出用弁装置とを前記各シリンダ室に対
応してそれぞれ前記各吸込孔及び吐出孔が各シリンダ室
に連通する如く設けると共に、前記シリンダヘッドに、
前記各吸込孔の入口側に位置し、これら各吸込孔に連通
する連通吸込通路と、前記各吐出孔の出口側に位置し、
前記吐出弁体を介して前記各吐出孔に連通する連通吐出
通路とを設けて、前記各プランジャの往復動により前記
各吸込弁体及び前記吐出弁体を作動させる如く成した多
連式往復動ポンプにおいて、前記各吸込弁座及び前記各
吐出弁座のうち、一つの弁座に、該弁座の弁座面に衝合
する前記弁体の移動方向と同方向に立上り前記連通吐出
通路に突入する立上部を設けて、該立上部の端面に制御
弁座面を設けると共に、前記シリンダヘッドにおける前
記連通吐出通路と連通吸込通路との間に貫通孔を設けて
、この貫通孔に、筒状を呈し、端面に前記制御弁座面と
衝合する衝合面と、前記制御弁座面の外径より大径の受
圧面とを設け、中心部に前記衝合面を貫通して前記連通
吸込通路を含む低圧側に常時開口する連通路を設けた一
つの圧力制御弁を前記制御弁座面に対し近接離反可能に
支持して、該圧力制御弁を、圧力調整体をもつた制御ば
ねにより、前記制御弁座面に押圧して、前記衝合面を前
記制御弁座面に衝合させ、前記連通路を連通吐出通路に
対し閉鎖させると共に、前記圧力制御弁の前記制御ばね
に対抗する移動により前記衝合面を前記制御弁座面に対
し離反させて前記連通吐出通路を、前記連通路を介して
前記低圧側に連通させる如く成す一方、前記貫通孔の前
記連通吸込通路側内周面に、該貫通孔より大径の内腔部
を設けると共に、前記圧力制御弁に、前記受圧面の外径
より大径で、かつ前記内腔部の内周面に対接する径大部
を設けて、この径大部と前記内腔部との間に蓄圧室を設
け、かつ前記連通吐出通路の出口に連通する送液通路の
途中に逆止弁を介装し、この逆止弁の出口側送液通路に
バイパス通路を設けて、該バイパス通路を前記蓄圧室に
連通させたことを特徴とする多連式往復動ポンプ。1. A suction valve in which a plunger is supported in each of the cylinder chambers of a cylinder having a plurality of cylinder chambers arranged in parallel, and the cylinder head provided at the tip of the cylinder has a suction hole and a suction valve seat surface. a suction valve device comprising a suction valve seat and a suction valve body that abuts against the suction valve seat surface to open and close the suction hole; a discharge valve seat having a discharge hole and a discharge valve seat surface; A discharge valve device comprising a discharge valve body that opens and closes the discharge hole by abutting against a valve seat surface, and each of the suction holes and the discharge hole communicates with each cylinder chamber in correspondence with each of the cylinder chambers. In addition, the cylinder head is provided with:
a communicating suction passage located on the inlet side of each of the suction holes and communicating with each of the suction holes; and a communicating suction passage located on the outlet side of each of the discharge holes,
A multiple reciprocating motion comprising a communicating discharge passage communicating with each of the discharge holes via the discharge valve body, and each of the suction valve bodies and the discharge valve body being actuated by the reciprocating motion of each of the plungers. In the pump, one valve seat of each of the suction valve seats and each of the discharge valve seats is provided with a valve that rises in the same direction as the moving direction of the valve body that abuts against the valve seat surface of the valve seat and connects to the communicating discharge passage. A protruding rising part is provided, a control valve seat surface is provided on the end face of the rising part, and a through hole is provided between the communicating discharge passage and the communicating suction passage in the cylinder head, and a cylinder is inserted into the through hole. a pressure-receiving surface having a larger diameter than the outer diameter of the control valve seat surface, and a pressure receiving surface having a diameter larger than the outer diameter of the control valve seat surface, and a pressure receiving surface that penetrates through the abutment surface in the center and has an abutment surface that abuts with the control valve seat surface on the end surface. One pressure control valve provided with a communication passage that is always open on the low pressure side including a communication suction passage is supported so as to be able to approach and separate from the control valve seat surface, and the pressure control valve is controlled with a pressure regulating body. A spring presses against the control valve seat surface to cause the abutment surface to abut against the control valve seat surface, thereby closing the communication passage to the communication discharge passage, and the control spring of the pressure control valve The opposing movement moves the abutment surface away from the control valve seat surface so that the communicating discharge passage communicates with the low pressure side via the communicating passage, while the communicating suction passage side of the through hole A lumen portion having a larger diameter than the through hole is provided on the inner circumferential surface, and a large diameter lumen portion is provided in the pressure control valve that has a larger diameter than the outer diameter of the pressure receiving surface and is in contact with the inner circumferential surface of the lumen portion. A pressure accumulation chamber is provided between the large-diameter portion and the inner cavity, and a check valve is interposed in the middle of the liquid feeding passage communicating with the outlet of the communication discharge passage. A multiple reciprocating pump characterized in that a bypass passage is provided in the liquid feeding passage on the outlet side of the valve, and the bypass passage is communicated with the pressure accumulation chamber.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54120480A JPS6047479B2 (en) | 1979-09-18 | 1979-09-18 | Multiple reciprocating pump |
| US06/261,205 US4407640A (en) | 1979-09-18 | 1980-01-25 | Reciprocating pump having unique pressure control valve construction |
| PCT/JP1980/000009 WO1981000889A1 (en) | 1979-09-18 | 1980-01-25 | Reciprocating pump |
| DE8080900419T DE3067664D1 (en) | 1979-09-18 | 1980-01-25 | Reciprocating pump |
| EP80900419A EP0035569B1 (en) | 1979-09-18 | 1981-04-08 | Reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54120480A JPS6047479B2 (en) | 1979-09-18 | 1979-09-18 | Multiple reciprocating pump |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59117619A Division JPS6085273A (en) | 1984-06-07 | 1984-06-07 | Multiple reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5644480A JPS5644480A (en) | 1981-04-23 |
| JPS6047479B2 true JPS6047479B2 (en) | 1985-10-22 |
Family
ID=14787207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54120480A Expired JPS6047479B2 (en) | 1979-09-18 | 1979-09-18 | Multiple reciprocating pump |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0035569B1 (en) |
| JP (1) | JPS6047479B2 (en) |
| DE (1) | DE3067664D1 (en) |
| WO (1) | WO1981000889A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6420892A (en) * | 1987-07-17 | 1989-01-24 | Janome Sewing Machine Co Ltd | Needle thread presser of sewing machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915191U (en) * | 1982-07-19 | 1984-01-30 | 三菱レイヨン株式会社 | Sensor lamp continuous lighting circuit |
| JPS60157988U (en) * | 1984-03-28 | 1985-10-21 | 株式会社 スギノマシン | Valve device in plunger pump |
| JPH01146734U (en) * | 1988-03-18 | 1989-10-11 | ||
| GB2241541B (en) * | 1989-08-28 | 1993-06-16 | Csir | Peristaltic pump |
| JP4964930B2 (en) * | 2009-09-17 | 2012-07-04 | 日立オートモティブシステムズ株式会社 | Pump device |
| JP5292480B2 (en) * | 2012-01-27 | 2013-09-18 | 日立オートモティブシステムズ株式会社 | Pump device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE72385C (en) * | W. T. BELL in Breslau, Kaiser Wilhelmstrafse | Arrangement of suction and pressure valves in the bottom of a pump boot | ||
| FR669992A (en) * | 1928-02-22 | 1929-11-22 | Improvements made to valve seat-valve assemblies, in particular assemblies of the type in question for piston pumps | |
| US3255954A (en) * | 1962-07-06 | 1966-06-14 | Atlas Copco Ab | Positive displacement compressors |
| DE1528432A1 (en) * | 1965-07-07 | 1970-02-26 | Paul Hammelmann | Pump head |
| JPS4216714Y1 (en) * | 1965-12-08 | 1967-09-26 | ||
| JPS4719767Y1 (en) * | 1968-09-30 | 1972-07-05 | ||
| JPS49108104U (en) * | 1973-01-10 | 1974-09-14 | ||
| US4116212A (en) * | 1976-06-14 | 1978-09-26 | Pall Corporation | Unidirectional flow control valve |
| AU2749777A (en) * | 1976-08-25 | 1979-02-08 | Applied Power Inc | Fluid actuated hydraulic pump |
| DE2704754A1 (en) * | 1977-02-04 | 1978-08-17 | Speck Kolbenpumpen Fabrik | VALVE ARRANGEMENT |
-
1979
- 1979-09-18 JP JP54120480A patent/JPS6047479B2/en not_active Expired
-
1980
- 1980-01-25 WO PCT/JP1980/000009 patent/WO1981000889A1/en active IP Right Grant
- 1980-01-25 DE DE8080900419T patent/DE3067664D1/en not_active Expired
-
1981
- 1981-04-08 EP EP80900419A patent/EP0035569B1/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6420892A (en) * | 1987-07-17 | 1989-01-24 | Janome Sewing Machine Co Ltd | Needle thread presser of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3067664D1 (en) | 1984-06-07 |
| EP0035569B1 (en) | 1984-05-02 |
| WO1981000889A1 (en) | 1981-04-02 |
| EP0035569A1 (en) | 1981-09-16 |
| JPS5644480A (en) | 1981-04-23 |
| EP0035569A4 (en) | 1982-01-11 |
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