WO2020161900A1 - Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression - Google Patents

Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression Download PDF

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Publication number
WO2020161900A1
WO2020161900A1 PCT/JP2019/004658 JP2019004658W WO2020161900A1 WO 2020161900 A1 WO2020161900 A1 WO 2020161900A1 JP 2019004658 W JP2019004658 W JP 2019004658W WO 2020161900 A1 WO2020161900 A1 WO 2020161900A1
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WO
WIPO (PCT)
Prior art keywords
control valve
poppet
sleeve
valve
pressure control
Prior art date
Application number
PCT/JP2019/004658
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English (en)
Japanese (ja)
Inventor
将悟 後川
Original Assignee
株式会社島津製作所
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 株式会社島津製作所 filed Critical 株式会社島津製作所
Priority to PCT/JP2019/004658 priority Critical patent/WO2020161900A1/fr
Priority to JP2020570325A priority patent/JP7147881B2/ja
Publication of WO2020161900A1 publication Critical patent/WO2020161900A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve

Definitions

  • the present invention relates to a pressure control valve and a hydraulic pilot type electromagnetic proportional control valve equipped with this pressure control valve.
  • the fork In a forklift truck as an industrial vehicle, the fork is moved by supplying hydraulic pressure generated by a hydraulic pump to a hydraulic cylinder as an actuator.
  • the hydraulic fluid sent from the hydraulic pump is supplied to the hydraulic cylinder via the control valve.
  • an operator operates an operation part such as a lever, and the operation force at this time is used to move the spool of the control valve to control the hydraulic oil supplied to the hydraulic cylinder. Valve is used.
  • an electromagnetic proportional control valve instead of a manual control valve (see Patent Document 1).
  • This electromagnetic proportional control valve uses a solenoid as an actuator, and has a configuration in which the spool is moved by using the solenoid drive and pilot pressure based on an electric signal. Since the electromagnetic proportional control valve controls the operation based on an electric signal, when the electromagnetic proportional control valve is used in a forklift, the operating part can be arranged at any position, which gives design freedom. There is a merit of improving.
  • the operating pressure may be retained in the hydraulic oil in the hydraulic cylinder, the control valve, and the pipe connecting these after use. If the pipe or the like is removed while the hydraulic oil has a residual pressure, high-pressure hydraulic oil is jetted out, which is dangerous. Therefore, it is necessary to perform depressurizing work to reduce the pressure of the hydraulic oil.
  • a port and B port for connecting high-pressure hydraulic oil from a pump line to a double-acting hydraulic cylinder, even if the spool is moved, both It is not possible to depressurize ports at the same time. Therefore, when the pressure release of the A port is performed, the B port is in the high pressure state, and when the pressure release of the B port is performed, the A port is in the high pressure state.
  • Patent Document 2 discloses a valve device for gas, in which a communication space sealed by a seal member is provided between a high pressure part and a low pressure part, and the pressure is released by dropping the seal member into the communication space. There is.
  • Patent Document 3 a valve body having a communication hole for discharging the pressure fluid in the fluid pipe, a seal member having the same diameter arranged on the outer circumference of the valve body with the communication hole interposed, and a circumferential groove are provided.
  • a flow path opening member, the sealing member in the moving direction of the flow path opening member is located in the circumferential groove, and from the gap formed by the valve body and the flow path opening member through the circumferential groove from the communication hole.
  • a residual pressure relief adapter for discharging pressurized fluid is disclosed.
  • the present invention has been made to solve the above problems, and a pressure control valve capable of easily performing depressurization without providing a dedicated bypass circuit and a hydraulic pilot type electromagnetic valve including the pressure control valve. It is intended to provide a proportional control valve.
  • a valve body a seat member arranged in the valve body, a position in contact with a valve seat formed in the seat member, and a position separated from the valve seat formed in the seat member.
  • a spring biasing the poppet toward a valve seat formed in the seat member, and a position of an end of the spring opposite to the poppet.
  • a pressure control valve capable of easily performing depressurization without providing a dedicated bypass circuit, and a hydraulic pilot type electromagnetic proportional control valve equipped with this pressure control valve.
  • FIG. 3 is a cross-sectional view of a hydraulic pilot type electromagnetic proportional control valve 50 including the pressure control valve 10 according to the embodiment of the present invention.
  • 3 is a front view of the pressure control valve 10.
  • FIG. 3 is a side view of the pressure control valve 10.
  • FIG. 3 is a sectional view taken along line AA in FIG. 2.
  • FIG. 3 is a sectional view taken along line AA in FIG. 2.
  • FIG. 1 is a sectional view of a hydraulic pilot type electromagnetic proportional control valve 50 (hereinafter, simply referred to as “control valve 50”) including a pressure control valve 10 according to an embodiment of the present invention.
  • control valve 50 a hydraulic pilot type electromagnetic proportional control valve 50
  • the spool 60 is shown in the neutral position.
  • the control valve 50 is connected to a hydraulic cylinder 40 for moving a fork 42 on which a cargo is placed in a forklift as an industrial vehicle.
  • the control valve 50 includes a P port 101 that is a hydraulic oil supply port into which high-pressure hydraulic oil is introduced from a hydraulic pump, and a T port 102 that is a recovery port for hydraulic oil that is opened to a low pressure region such as a hydraulic tank. Is selectively connected to the A port 103 as the first cargo handling port for moving the piston 41 of the hydraulic cylinder 40 or the B port 104 as the second cargo handling port.
  • the control valve 50 has a plurality of land portions and a plurality of groove portions alternately formed, and includes a spool 60 that can reciprocate in the left-right direction shown in FIG.
  • the spool 60 is biased toward the neutral position shown in FIG. 1 by the action of the pair of springs 61 and 62.
  • the control valve 50 also includes a pair of solenoids 52 and 53 for moving the spool 60 and a pair of spool valves 56 and 57.
  • the spool 60 moves to the right as shown in FIG.
  • the pressure control valve 10 is connected to each of the hydraulic oil passage communicating with the A port 103 and the hydraulic oil passage communicating with the B port 104.
  • the pressure control valve 10 functions as a relief valve during normal operation.
  • the pressure control valve 10 also functions as a means for depressurizing the hydraulic oil.
  • FIG. 2 is a front view of the pressure control valve 10
  • FIG. 3 is a side view of the pressure control valve 10.
  • 4 and 5 are sectional views taken along the line AA in FIG. Note that FIG. 4 shows a normal state, and FIG. 5 shows a state in which pressure release work is performed by the pressure control valve 10. Further, the members painted black in FIGS. 4 and 5 are O-rings.
  • the pressure control valve 10 is a balance piston type configuration including a main sleeve 12 supported by a valve body 11 and a main poppet 15 slidably arranged in the main sleeve 12 with respect to the main sleeve 12. Has become.
  • the main poppet 15 includes a hollow member 13 that forms a passage for hydraulic oil.
  • the main poppet 15 including the hollow member 13 is biased by a spring 16 as a biasing means in a direction in which the right end in FIG. 4 contacts the valve seat region formed on the main sleeve 12. Further, the hollow member 13 which is a part of the main poppet 15 is formed with an orifice 14 which connects the A port 103 or the B port 104 shown in FIG.
  • a pressure difference of the hydraulic oil occurs before and after the main poppet 15. Then, the pressure of the hydraulic oil that acts on the upstream surface (the surface on the right side in FIG. 4) of the main poppet 15 exceeds the total value of the pressure that acts on the downstream surface (the surface on the left side in FIG.
  • the main poppet 15 provided with the hollow member 13 moves by a pilot method. That is, the pilot poppet 21 is arranged downstream of the main poppet 15 in order to control the flow rate of the main poppet 15 passing through the orifice 14.
  • the pilot poppet 21 is urged toward the valve seat surface of the seat member 17 provided at one end of the main sleeve 12 by the action of the spring 22.
  • the pilot poppet 21 separates from the valve seat surface of the seat member 17, and inside the main sleeve 12.
  • the hydraulic oil of FIG. 1 flows out to the T port 102 shown in FIG.
  • the hydraulic oil passes through the orifice 14 of the main poppet 15, and a pressure difference occurs between the upstream surface and the downstream surface of the main poppet 15, so that the main poppet 15 opens.
  • the end of the spring 22 that biases the pilot poppet 21 toward the seat member 17 is opposite to the end of the spring 22 that is in contact with the pilot poppet 21, and is in contact with the positioning member 25 disposed in the sleeve 23. ..
  • the sleeve 23 is coupled to the valve body 11 by using a screw portion 71. Further, the sleeve 23 and the positioning member 25 are coupled by using the screw portion 72.
  • the positions of the main poppet 15 and the pilot poppet 21 in the sleeve 23 in the moving direction (first direction) are determined by the flange portion 27 of the sleeve 23 contacting the edge of the valve body 11.
  • the flange portion 27 of the sleeve 23 functions as a positioning member for positioning the sleeve 23 in the first direction.
  • the position of the positioning member 25 in the first direction which is the moving direction of the pilot poppet 21 with respect to the sleeve 23
  • the lock nut 24 coupled using the positioning member 25 and the screw portion 73.
  • the biasing force of the pilot poppet 21 against the seat member 17 can be adjusted by changing the position of the positioning member 25 with respect to the sleeve 23 in the first direction using the lock nut 24.
  • the biasing force of the pilot poppet 21 with respect to the seat member 17 can be made constant, and as a result, with respect to the main poppet 15.
  • the pilot pressure can be kept constant.
  • a groove 26 is formed around the entire circumference of the sleeve 23. Then, a screw 29 that is screwed into the valve body 11 is arranged from the side surface of the valve body 11 toward the inside. The tip of the screw 29 is arranged in the groove 26.
  • the screw 29 and the concave groove 26 function as a restricting member that restricts the reciprocal movement distance of the sleeve 23 in the first direction.
  • the hydraulic oil in the hydraulic oil passage communicating with the A port 103 or the hydraulic oil passage communicating with the B port 104 is When the pressure becomes equal to or higher than the set value, the pilot poppet 21 and the main poppet 15 sequentially move, and the hydraulic fluid in the hydraulic fluid passage communicating with the A port 103 or the hydraulic fluid passage communicating with the B port 104 becomes T Outflows to port 102. In this state, the pressure control valve 10 functions as a relief valve.
  • the sleeve 23 is separated from the seat member 17 by rotating the sleeve 23 with respect to the valve body 11, as shown in FIG. Direction (leftward in FIG. 5).
  • the pilot poppet 21 and the spring 22 also move together with the sleeve 23, and the pilot poppet 21 is separated from the seat member 17.
  • the sleeve 23 is rotated with respect to the valve body 11 to move the sleeve 23 in the direction approaching the seat member 17 (the direction opposite to the first direction).
  • the sleeve 23 is positioned at the initial position by the flange portion 27 of the sleeve 23 coming into contact with the end edge of the valve body 11.
  • the position of the positioning member 25 in the first direction with respect to the sleeve 23 is maintained constant by the lock nut 24. Therefore, even after the depressurization work, the urging force of the pilot poppet 21 on the seat member 17 can be made constant, and thus the pilot pressure on the main poppet 15 can be kept constant. Therefore, it is possible to maintain the relief pressure constant even when the pressure relief valve 10 is used to perform the pressure relief work.
  • the pressure control valve 10 according to the embodiment of the present invention is applied to the hydraulic pilot type electromagnetic proportional control valve 50 in the above-described embodiment, the spool 60 is used instead of the hydraulic pilot type electromagnetic proportional control valve 50.
  • the pressure control valve 10 according to the embodiment of the present invention may be applied to a manual control valve that is manually moved. Further, the pressure control valve 10 according to the embodiment of the present invention may be applied to a hydraulic circuit other than the control valve.
  • the valve body, the seat member disposed in the valve body, the position in contact with the valve seat formed in the seat member, and the seat member are formed.
  • a poppet that moves in a first direction between a position separated from the valve seat, a spring that biases the poppet toward a valve seat formed in the seat member, and the poppet in the spring.
  • a pressure control valve comprising: an adjusting member that adjusts the biasing force of the spring on the poppet by changing the position of the end on the opposite side, in the valve body with the adjusting member supported.
  • a pressure control valve including: a sleeve capable of reciprocating in the first direction; and a positioning member that positions the sleeve with respect to the first direction.
  • the pressure control valve of the first aspect by moving the sleeve to form the passage between the poppet and the seat member, the pressure control valve can be provided without providing a dedicated bypass circuit for the hydraulic circuit. It is possible to easily perform depressurization at the valve.
  • the embodiment according to the first aspect of the present invention is the pressure control valve, wherein the positioning member is a flange portion formed on the opposite side of the sleeve from the poppet and abutting on the valve body.
  • Another embodiment according to the first aspect is a pressure control valve including a regulating member that regulates a reciprocating movement distance of the sleeve in the first direction.
  • Yet another embodiment according to the first aspect of the present invention is a valve body, a main sleeve supported by the valve body, and a position in the main sleeve that abuts a valve seat formed on the main sleeve.
  • a main poppet having an orifice formed therein so as to be slidable in a first direction between a position separated from a valve seat formed on the main sleeve, and the main poppet formed on the main sleeve.
  • a spring for the main poppet that urges toward the valve seat, a seat member fixed to the end of the main sleeve opposite to the main poppet, and a position that abuts the valve seat formed on the seat member.
  • a pilot poppet that controls the inflow of hydraulic fluid from an orifice formed in the main poppet by moving in a first direction between a position separated from the valve seat formed in the seat member, By changing the position of the pilot poppet spring that biases the pilot poppet toward the valve seat formed in the seat member, and the position of the end of the pilot poppet spring opposite to the pilot poppet.
  • a balance piston type pressure control valve comprising: an adjusting member for adjusting the biasing force of the pilot poppet spring to the pilot poppet; A sleeve capable of reciprocating in one direction, and a flange portion that is formed on the opposite side of the sleeve from the pilot poppet and that positions the sleeve in the first direction by contacting the valve body. , And a pressure control valve.
  • the pressure control valve functions as a relief valve
  • the urging force of the pilot poppet against the seat member can be made constant even after depressurizing work.
  • the pilot pressure for the poppet can be kept constant, and the relief pressure can be kept constant.
  • a housing in which a hydraulic oil supply port, a first cargo handling port, and a second cargo handling port are formed is reciprocated, and the first and second housings are reciprocated.
  • Hydraulic pilot type electromagnetic proportional control valve provided with a spool for selectively connecting the cargo handling port and the second cargo handling port to the hydraulic oil supply port, and a spool moving mechanism for reciprocating the spool by a hydraulic pilot method.
  • the pressure control valve according to the above-described first embodiment is connected to a passage for hydraulic fluid communicating with at least one of the first cargo handling port and the second cargo handling port. ..

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Valve Housings (AREA)

Abstract

L'invention concerne une soupape de régulation de pression (10) comprenant : un corps de soupape (11) ; un élément de siège (17) installé à l'intérieur du corps de soupape (11) ; un champignon (21) qui se déplace dans une première direction entre une position venant en butée contre un siège de soupape formé sur l'élément de siège (17) et une position espacée du siège de soupape formé sur l'élément de siège (17) ; un ressort (22) qui pousse le champignon (21) vers le siège de soupape formé sur l'élément de siège (17) ; et un élément de réglage (25) qui règle la force de poussée appliquée au champignon (21) par le ressort (22) en changeant la position d'une partie terminale du ressort (22) sur le côté opposé à partir du champignon (21). La soupape de régulation de pression (10) est pourvue : d'un manchon (23) qui peut se déplacer en va-et-vient dans la première direction à l'intérieur du corps de soupape (11) tout en supportant l'élément de réglage (25) ; et d'un élément de positionnement (27) qui positionne le manchon (23) dans la première direction.
PCT/JP2019/004658 2019-02-08 2019-02-08 Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression WO2020161900A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2019/004658 WO2020161900A1 (fr) 2019-02-08 2019-02-08 Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression
JP2020570325A JP7147881B2 (ja) 2019-02-08 2019-02-08 圧力制御弁およびこの圧力制御弁を備えた油圧パイロット式電磁比例コントロールバルブ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/004658 WO2020161900A1 (fr) 2019-02-08 2019-02-08 Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression

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WO2020161900A1 true WO2020161900A1 (fr) 2020-08-13

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PCT/JP2019/004658 WO2020161900A1 (fr) 2019-02-08 2019-02-08 Soupape de régulation de pression et soupape de commande électromagnétique proportionnelle de type pilote hydraulique pourvue de ladite soupape de régulation de pression

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WO (1) WO2020161900A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113818U (fr) * 1975-03-12 1976-09-16
JPS5443735B1 (fr) * 1968-12-20 1979-12-21
JPS55181072U (fr) * 1979-06-15 1980-12-26
JPS5655765A (en) * 1979-10-12 1981-05-16 Nippon Air Brake Co Ltd Pressure regulaing valve
JP2017067095A (ja) * 2015-09-28 2017-04-06 ナブテスコ株式会社 リリーフ弁

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443735B1 (fr) * 1968-12-20 1979-12-21
JPS51113818U (fr) * 1975-03-12 1976-09-16
JPS55181072U (fr) * 1979-06-15 1980-12-26
JPS5655765A (en) * 1979-10-12 1981-05-16 Nippon Air Brake Co Ltd Pressure regulaing valve
JP2017067095A (ja) * 2015-09-28 2017-04-06 ナブテスコ株式会社 リリーフ弁

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JPWO2020161900A1 (ja) 2021-12-09
JP7147881B2 (ja) 2022-10-05

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