CN112797170A - A hydraulic control valve - Google Patents

A hydraulic control valve Download PDF

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Publication number
CN112797170A
CN112797170A CN202110115414.9A CN202110115414A CN112797170A CN 112797170 A CN112797170 A CN 112797170A CN 202110115414 A CN202110115414 A CN 202110115414A CN 112797170 A CN112797170 A CN 112797170A
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China
Prior art keywords
water
valve cavity
cylindrical shell
main valve
valve
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Granted
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CN202110115414.9A
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Chinese (zh)
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CN112797170B (en
Inventor
陈伯聪
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Chinadrip Irrigation Equipment Co ltd
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Chinadrip Irrigation Equipment Co ltd
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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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2021—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member with a plurality of valve members
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

本发明涉及一种水力控制阀门，包括阀体、封水组件和开关组件，所述阀体具有一主阀腔和位于主阀腔轴向两侧上的两次阀腔，所述封水组件具有让进水口与主阀腔密封隔离设置的筒状壳体，以及设置于筒状壳体的周壁上封水挡板，所述开关组件包括开关阀、连接管、活动卡扣和弹性件，所述连接管让出水端与两次阀腔连通设置，所述开关阀控制连接管中水流的开启和关闭；所述活动卡扣包括位于次阀腔内的活塞部、位于主阀腔内的抵止部以及连接活塞部和抵止部的杆部，所述弹性件对所述活动卡扣产生将其推向主阀腔的弹力，以解决现有水力控制阀门存在水头损失大、开合反应慢的问题。

Figure 202110115414

The invention relates to a hydraulic control valve, comprising a valve body, a water sealing component and a switch component. The valve body has a main valve cavity and two valve cavities located on both axial sides of the main valve cavity. The water sealing component It has a cylindrical casing that seals and isolates the water inlet from the main valve cavity, and a water-sealing baffle set on the peripheral wall of the cylindrical casing. The switch assembly includes a switch valve, a connecting pipe, a movable buckle and an elastic piece. The connecting pipe allows the water outlet to communicate with the two valve cavities, and the on-off valve controls the opening and closing of the water flow in the connecting pipe; the movable buckle includes a piston part located in the secondary valve cavity, a The stop part and the rod part connecting the piston part and the stop part, the elastic piece produces the elastic force for the movable buckle to push it to the main valve cavity, so as to solve the problem of the existing hydraulic control valve that has large head loss, opening and closing. slow response.

Figure 202110115414

Description

Hydraulic control valve
Technical Field
The invention relates to the field of valves, in particular to a hydraulic control valve.
Background
The hydraulic control valve is a valve which utilizes the pressure of fluid medium transmitted in a pipeline and controls the action of a sealing component in the valve by means of the pressure difference of the medium to realize the opening and closing of the valve or regulate and control the opening degree. The existing hydraulic control valve is mostly opened or closed by the elastic deformation of a valve clack, so that the problems of large head loss, slow opening and closing reaction and the like exist.
Disclosure of Invention
The invention aims to provide a hydraulic control valve to solve the problems of large head loss and slow opening and closing reaction of the conventional hydraulic control valve.
The specific scheme is as follows:
a hydraulic control valve, comprising:
the valve body is provided with a main valve cavity, two secondary valve cavities positioned on two axial sides of the main valve cavity, and a water inlet and a water outlet positioned on two radial sides of the main valve cavity, wherein the two secondary valve cavities are sealed and isolated from the main valve cavity, and the water inlet and the water outlet are communicated with the main valve cavity;
the water sealing assembly is arranged in the main valve cavity and comprises a water sealing base and a plurality of water sealing baffle plates, the water sealing base is provided with a cylindrical shell with one open end and one closed end, the open end of the cylindrical shell is covered on the water inlet of the main valve cavity, the water inlet is sealed and isolated from the main valve cavity, a plurality of hollowed-out parts are arranged on the peripheral wall of the cylindrical shell, and each hollowed-out part is movably provided with a water sealing baffle plate matched with the hollowed-out part where the hollowed-out part is located, so that the hollowed-out parts can be sealed and blocked by the water sealing baffle plates;
the switch assembly comprises a switch valve, a connecting pipe, a movable buckle and an elastic piece, wherein the water inlet end of the connecting pipe is positioned at the front end of the water inlet of the main valve cavity, and the water outlet end of the connecting pipe is communicated with the two valve cavities; the switch valve is fixedly arranged on the connecting pipe to control the opening and closing of water flow in the connecting pipe; each time, a movable buckle is movably arranged in each valve cavity, the movable buckle comprises a piston part positioned in the secondary valve cavity, a stop part positioned in the main valve cavity and a rod part connecting the piston part and the stop part, the piston part can move in the secondary valve cavity in a sealing manner, and the stop part can seal a water baffle and is fixed in the hollow part in a sealing manner; the elastic piece generates elastic force for pushing the movable buckle to the main valve cavity.
Furthermore, the cylindrical shell of the water sealing base is in a frustum shape, the inner diameter of the cylindrical shell in the frustum shape is sequentially reduced from the opening end to the closed end, one end, close to the opening end of the cylindrical shell, of the water sealing baffle is pivoted with the cylindrical shell, and one end, close to the closed end of the cylindrical shell, of the water sealing baffle is placed freely.
Furthermore, each side surface of the frustum-shaped cylindrical shell is provided with a hollow part.
Furthermore, a cone protruding towards the opening end is further arranged on the closed end of the cylindrical shell, and the outer diameter of the cone is sequentially reduced from the closed end of the cylindrical shell towards the opening end.
Furthermore, the width of the water sealing baffle plate close to the closed end of the cylindrical shell is smaller than the width of the water sealing baffle plate close to the open end of the cylindrical shell.
Furthermore, the water sealing baffle comprises a soft plate body and a hard lining part, the lining part comprises an annular base matched with the edge shape of the water sealing baffle and arranged on the annular base, a plurality of lining strips are arranged on the plate body and matched with the lining strips, and the lining strips are embedded in the corresponding jacks of the plate body and fixed.
Furthermore, the secondary valve cavity is provided with an exhaust hole communicated with the external environment, and the exhaust hole is communicated with the inner wall of the secondary valve cavity and is positioned on one side of the piston part, which faces the bottom surface of the main valve cavity and is close to the main valve cavity, and is positioned outside the moving stroke of the piston part.
Compared with the prior art, the hydraulic control valve provided by the invention has the following advantages: the hydraulic control valve provided by the invention realizes sealing only by water power, has the advantages of small loss of a water head, large water passing amount, quick opening and closing reaction and the like, can effectively reduce the installation of other types of valves, and is favorable for reducing the construction cost.
Drawings
Fig. 1 shows a perspective view of a hydraulic control valve.
Fig. 2 shows a schematic sectional view of a hydraulic control valve in one direction of view.
Fig. 3 shows a schematic view of a water seal assembly.
Fig. 4 shows a schematic view of a water-sealing base.
Fig. 5 shows a schematic view of a water-sealing baffle.
Figure 6 shows a top view of the hydraulic control valve.
Fig. 7 shows a schematic view of the movable catch and the elastic member.
Fig. 8 shows a schematic view of the hydraulic control valve in a closed state.
Fig. 9 shows a schematic diagram of the hydraulic control valve in an open state.
Fig. 10 shows an exploded view of a water-seal baffle.
Fig. 11 shows a schematic sectional view of the hydraulic control valve in another view.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 to 11, the present embodiment provides a hydraulic control valve, which includes a valve body 1, a water sealing assembly 2 and a switching assembly 3.
The valve body 1 is provided with a main valve cavity 10, two valve cavities 11 positioned on two axial sides of the main valve cavity 10, and a water inlet 12 and a water outlet 13 positioned on two radial sides of the main valve cavity 10, wherein the two valve cavities 11 are sealed and isolated from the main valve cavity 10. In this embodiment, a water inlet pipe 14 and a water outlet pipe 15 are respectively disposed on two radial sides of the main valve cavity 10, the water inlet pipe 14 is communicated with the main valve cavity 10 through the water inlet 12, and the water outlet pipe 15 is communicated with the main valve cavity 10 through the water outlet 13.
Seal water subassembly 2 install in main valve chamber 10, it includes seals water base 20 and a plurality of water baffle 21, seal water base 20 and have one end opening, one end confined tube-shape casing 200, the open end cover of tube-shape casing 200 is located on the water inlet 12 of main valve chamber 10, so that water inlet 12 with main valve chamber 10 is sealed to keep apart the setting, be provided with a plurality of fretwork portions 201 on the perisporium of tube-shape casing 200, all movable mounting has a water baffle 21 on each fretwork portion 201, water baffle 21 sets up rather than the fretwork portion 201 phase-match at place, so that water baffle 21 can with fretwork portion 201 seals up.
In the present embodiment, the water-sealing baffle 21 is movably mounted in the hollow portion 201 in a manner that one end is pivoted to the cylindrical housing 200 and the other end is freely placed. Specifically, a pivot shaft 210 is respectively arranged on two sides of one end of the water sealing baffle plate 21, a shaft hole is formed in the side wall of the hollow part 201 and matched with the pivot shaft 210 of the water sealing baffle plate 21, so that one end of the water sealing baffle plate 21 is fixed in the hollow part 201 in a pivot mode, the other end of the water sealing baffle plate 21 is freely placed, the free end of the water sealing baffle plate 21 can be ejected by water pressure, and water can flow out of the hollow part 201 of the water sealing base 20.
The switch component 3 comprises a switch valve 30, a connecting pipe 31, a movable buckle 32 and an elastic part 33, wherein the water inlet end of the connecting pipe 31 is positioned at the front end of the water inlet 12 of the main valve cavity 10, and the water outlet end of the connecting pipe 31 is communicated with the two valve cavities 11; the switching valve 30 is fixedly installed on the connection pipe 31 to control the flow of water in the connection pipe 31 to be turned on and off. In this embodiment, the side wall of the inlet pipe 14 is provided with a joint pipe 141 communicated with the inlet pipe, a three-way valve 142 is installed on the free end of the joint pipe 141, one outlet of the three-way valve is connected with the inlet of a three-way joint 143, and the other two outlets of the three-way joint 143 are respectively connected and communicated with the two-way valve chamber 11 through a connecting pipe 31.
Each valve chamber 11 is movably provided with a movable buckle 32, and each movable buckle 32 comprises a piston part 320 positioned in the secondary valve chamber 11, an abutting part 321 positioned in the primary valve chamber 10 and a rod part 322 connecting the piston part 320 and the abutting part 321. Wherein the outer shape of the piston part 320 is matched with the shape of the secondary valve cavity 11, so that the piston part 320 can move in the secondary valve cavity 11 in a sealing way; the stopping portion 321 has a notch matching with the cylindrical housing 200, so that the stopping portions 321 of the two movable buckles 32 are oppositely arranged to form a substantially annular notch to hoop the cylindrical housing 200, so that the stopping portion 321 of the movable buckle 32 can be sealed and fixed in the hollow portion 201 by the water sealing baffle 21, and the water sealing base 20 can block the water inlet 12 of the main valve cavity 10.
Each valve chamber 11 is further fixedly provided with an elastic member 33, and in this embodiment, the elastic member 33 is a spring. The elastic member 33 acts on the piston portion 320 of the movable catch 32 in the secondary valve chamber 11, so that the elastic member 33 exerts an elastic force on the movable catch 32 to push the movable catch 32 to the primary valve chamber 10.
The hydraulic control valve provided by the embodiment is used as follows:
when the three-way valve (i.e. the switch valve 30) is adjusted to the closed state, referring to fig. 8, water flows into the secondary valve cavities 11 at two axial ends of the main valve cavity 10 from the connecting pipes 31 at two ends, and the movable buckle 32 is pushed under the combined action of the water pressure in the secondary valve cavities 11 and the elastic force of the elastic member 33 to press the water-sealing baffle 21 in the main valve cavity 10 in the hollow part 201 of the water-sealing base 20, so that the cylindrical shell 200 of the water-sealing base 20 is in the closed state, thereby blocking the water inlet 12 of the main valve cavity 10, and water cannot flow into the main valve cavity 10 from the water inlet pipe 14, at this time, the hydraulic control valve is in the closed state.
When the three-way valve (i.e. the on-off valve 30) is turned to the open state, referring to fig. 9, the water outlet end of the joint tube 141 is in the closed state, and water cannot flow into the secondary valve cavity 11 at the two axial ends of the primary valve cavity 10 from the connecting tube 31, so that the water pressure in the water inlet tube 14 can overcome the elastic force of the elastic member 33 to push the water-sealing baffle 21 away from the hollow portion 201 of the water-sealing base 20, so that water can flow out of the hollow portion 201 of the water-sealing base 20 into the primary valve cavity 10, and finally flow out of the water outlet 13 into the water outlet tube 15, and at this time, the hydraulic control valve is in the open state.
The hydraulic control valve provided by the embodiment realizes sealing only by water power, has the advantages of small loss of a water head, large water passing amount, quick opening and closing reaction and the like, can effectively reduce the installation of other types of valves, and is favorable for reducing the construction cost.
In this embodiment, referring to fig. 4-6, the cylindrical housing 200 of the water sealing base 20 is in a frustum shape, wherein the inner diameter of the frustum-shaped cylindrical housing 200 decreases from the open end to the closed end in sequence, a hollow portion 201 is formed on each side of the frustum-shaped cylindrical housing 200, one end of the water sealing baffle 21 close to the open end of the cylindrical housing 200 is pivotally connected to the cylindrical housing 200, and one end close to the closed end of the cylindrical housing 200 is freely placed, so that the water sealing baffle 21 can be pushed open by a small water pressure.
Preferably, a cone 202 protruding toward the opening end is further disposed on the closed end of the cylindrical shell 200, and the outer diameters of the cones decrease from the closed end to the opening end of the cylindrical shell 200 in sequence, so that water entering the cylindrical shell 200 can better act on the free end of the water-sealing baffle 21, and the water-sealing baffle 21 can be pushed open by a small water pressure.
Preferably, the width of the water-sealing baffle 21 near the closed end of the cylindrical shell 200 is smaller than the width near the open end of the cylindrical shell 200, that is, the outer shape of the water-sealing baffle 21 is substantially trapezoidal, and the trapezoidal upper bottom plate faces the closed end of the cylindrical shell 200, so that the water-sealing baffle 21 can be pushed open by a small water pressure.
In the present embodiment, referring to fig. 3, 5 and 10, the water-sealing shutter 21 includes a soft plate body 211 and a hard lining member 212. Since the cylindrical housing 200 is made of a material with a relatively high hardness, such as metal or hard plastic, the plate 211 is usually made of a material such as relatively soft rubber or silica gel, so that when the movable buckle 32 presses the plate 211, the elastic deformation between the plate 211 and the cylindrical housing 200 can provide a better sealing property between the plate 211 and the cylindrical housing 200. However, since the soft plate 211 is easily deformed by the water pressure to cause a problem of water leakage, in the present embodiment, the lining member 212 is usually made of a material with a relatively high hardness, such as metal or hard plastic, and is embedded in the plate 211, so that the water-sealing baffle 21 as a whole has a high rigidity to prevent the deformation of the plate 211 and facilitate the pivoting of the water-sealing baffle 21. The lining member 212 includes an annular base 2120 which is matched with the edge shape of the water-sealing baffle 21, a plurality of lining strips 2121 are arranged on the annular base 2120, the plate body 211 is provided with insertion holes 2101 which are matched with the lining strips 2121, and the lining strips 2121 are embedded in the insertion holes 2101 corresponding to the plate body 211 and fixed, so that the water-sealing baffle 21 can have good rigidity intensity on the whole, and the surface of the water-sealing baffle contacting with the cylindrical shell 200 can have certain deformation capability to achieve good sealing effect.
Referring to fig. 11, each time the valve chamber 11 is further provided with an exhaust hole 110 communicating with the external environment, the position where the exhaust hole 110 communicates with the inner wall of the secondary valve chamber 11 is located on the side of the piston portion 320 facing the bottom surface of the main valve chamber 10 close to the main valve chamber, and is located outside the moving stroke of the piston portion 320, so as to prevent the occurrence of water leakage due to the movement of the piston portion 320. The air vent 110 prevents the piston part 320 from compressing air during movement to prevent the water sealing baffle 21 from being completely pressed, and also prevents the water sealing baffle 21 from being pushed away by the movable buckle 32 due to vacuum, thereby ensuring the normal operation of the hydraulic control valve.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A hydraulically controlled valve, comprising:
the valve body is provided with a main valve cavity, two secondary valve cavities positioned on two axial sides of the main valve cavity, and a water inlet and a water outlet positioned on two radial sides of the main valve cavity, wherein the two secondary valve cavities are sealed and isolated from the main valve cavity, and the water inlet and the water outlet are communicated with the main valve cavity;
the water sealing assembly is arranged in the main valve cavity and comprises a water sealing base and a plurality of water sealing baffle plates, the water sealing base is provided with a cylindrical shell with one open end and one closed end, the open end of the cylindrical shell is covered on the water inlet of the main valve cavity, the water inlet is sealed and isolated from the main valve cavity, a plurality of hollowed-out parts are arranged on the peripheral wall of the cylindrical shell, and each hollowed-out part is movably provided with a water sealing baffle plate matched with the hollowed-out part where the hollowed-out part is located, so that the hollowed-out parts can be sealed and blocked by the water sealing baffle plates;
the switch assembly comprises a switch valve, a connecting pipe, a movable buckle and an elastic piece, wherein the water inlet end of the connecting pipe is positioned at the front end of the water inlet of the main valve cavity, and the water outlet end of the connecting pipe is communicated with the two valve cavities; the switch valve is fixedly arranged on the connecting pipe to control the opening and closing of water flow in the connecting pipe; each time, a movable buckle is movably arranged in each valve cavity, the movable buckle comprises a piston part positioned in the secondary valve cavity, a stop part positioned in the main valve cavity and a rod part connecting the piston part and the stop part, the piston part can move in the secondary valve cavity in a sealing manner, and the stop part can seal a water baffle and is fixed in the hollow part in a sealing manner; the elastic piece generates elastic force for pushing the movable buckle to the main valve cavity.
2. The hydraulic control valve of claim 1, wherein: the cylindrical shell of the water sealing base is in a frustum shape, the inner diameter of the cylindrical shell in the frustum shape is reduced from the opening end to the closed end, one end, close to the opening end of the cylindrical shell, of the water sealing baffle is pivoted with the cylindrical shell, and one end, close to the closed end of the cylindrical shell, of the water sealing baffle is placed freely.
3. The hydraulic control valve of claim 2, wherein: each side surface of the frustum-shaped cylindrical shell is provided with a hollow part.
4. The hydraulic control valve of claim 2, wherein: the closed end of the cylindrical shell is also provided with a cone protruding towards the opening end, and the outer diameter of the cone is sequentially reduced from the closed end of the cylindrical shell towards the opening end.
5. The hydraulic control valve of claim 2, wherein: the width of the water sealing baffle close to the closed end of the cylindrical shell is smaller than that of the water sealing baffle close to the open end of the cylindrical shell.
6. The hydraulic control valve of claim 1, wherein: the water sealing baffle comprises a soft plate body and a hard lining piece, the lining piece comprises an annular base matched with the edge shape of the water sealing baffle and a plurality of lining strips arranged on the annular base, the plate body is provided with insertion holes matched with the lining strips, and the lining strips are embedded in the insertion holes corresponding to the plate body and fixed.
7. The hydraulic control valve of claim 1, wherein: the secondary valve cavity is provided with an exhaust hole communicated with the external environment, and the exhaust hole is communicated with the inner wall of the secondary valve cavity and is positioned on one side, close to the main valve cavity, of the bottom surface, facing the main valve cavity, of the piston part and is positioned outside the moving stroke of the piston part.
CN202110115414.9A 2021-01-28 2021-01-28 A hydraulic control valve Active CN112797170B (en)

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CN112797170B CN112797170B (en) 2025-04-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980067784A (en) * 1997-02-12 1998-10-15 박상근 Hydro-Pneumatic Boost Control Valve
CN2499654Y (en) * 2001-07-18 2002-07-10 张骥 Hydropower control valve
CN2620144Y (en) * 2003-05-29 2004-06-09 上海弘立阀门制造有限公司 Hydraulic control valve
CN214367789U (en) * 2021-01-28 2021-10-08 厦门华最灌溉设备科技有限公司 Hydraulic control valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980067784A (en) * 1997-02-12 1998-10-15 박상근 Hydro-Pneumatic Boost Control Valve
CN2499654Y (en) * 2001-07-18 2002-07-10 张骥 Hydropower control valve
CN2620144Y (en) * 2003-05-29 2004-06-09 上海弘立阀门制造有限公司 Hydraulic control valve
CN214367789U (en) * 2021-01-28 2021-10-08 厦门华最灌溉设备科技有限公司 Hydraulic control valve

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