CN115095696A - Large-flow pilot-operated pressure compensation valve - Google Patents
Large-flow pilot-operated pressure compensation valve Download PDFInfo
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- CN115095696A CN115095696A CN202210914025.7A CN202210914025A CN115095696A CN 115095696 A CN115095696 A CN 115095696A CN 202210914025 A CN202210914025 A CN 202210914025A CN 115095696 A CN115095696 A CN 115095696A
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- 238000013016 damping Methods 0.000 claims description 25
- 230000008054 signal transmission Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
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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
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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
- F16K17/048—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 combined with other safety valves, or with pressure control devices
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a high-flow pilot-operated pressure compensation valve. The main technical problem that the signal that exists of current pressure compensating valve is more disturbed greatly and the regulation precision is low by main valve core hydrodynamic force than is solved. The technical scheme of the invention is as follows: a high-flow pilot-operated pressure compensation valve comprises a fixed-differential pressure reduction valve, a transition plate and a pilot valve, wherein the fixed-differential pressure reduction valve, the transition plate and the pilot valve are sequentially assembled together, and the transition plate is provided with a first oil duct, a second oil duct, a third oil duct and a second signal input port; the constant-differential-pressure-reducing valve is characterized in that a central oil duct of a pressure-reducing spring seat of the constant-differential-pressure-reducing valve is connected with the left end of a first oil duct, the right end of the first oil duct is connected with a pilot valve oil inlet cavity, a pressure-reducing oil duct arranged on the constant-differential-pressure-reducing valve is connected with the left end of a second oil duct, the right end of the second oil duct is connected with a pilot valve oil outlet cavity, a second damper is arranged at a port of the right end of the first oil duct, the right end of a third oil duct is connected with a spring cavity, and the other end of the third oil duct is connected with a second signal input port.
Description
Technical Field
The invention belongs to the technical field of pilot hydraulic valves, and particularly relates to a high-flow pilot pressure compensating valve.
Background
In the valve control system, the pressure compensation valve mainly refers to a fixed difference pressure reducing valve of a two-way speed regulating valve and a fixed difference overflow valve of a three-way speed regulating valve, signals for comparison are directly acted on two ends of a valve core, pressure compensation is realized through the sizes of openings of the valve core and a valve body, and if the flow rate of the system is changed greatly, the influence of hydraulic force on a valve core pressure compensation opening is great. Therefore, the existing signal has the problems of large hydraulic interference of a main valve core and low regulation precision compared with the main valve core.
Disclosure of Invention
The invention aims to solve the technical problems of large signal interference and low adjustment precision of the existing pressure compensation valve compared with the main valve core hydraulic force, and provides a large-flow pilot-operated pressure compensation valve.
In order to solve the technical problems, the invention adopts the technical scheme that:
a high-flow pilot-operated pressure compensation valve comprises a fixed-differential pressure reduction valve, a transition plate and a pilot valve, wherein the fixed-differential pressure reduction valve, the transition plate and the pilot valve are sequentially assembled together, and the transition plate is provided with a first oil duct, a second oil duct, a third oil duct and a second signal input port; the central oil duct of a pressure reducing spring seat of the constant-difference pressure reducing valve is connected with the left end of a first oil duct arranged in a transition plate, the right end of the first oil duct is connected with a pilot valve oil inlet cavity of a pilot valve through an oil duct, a pressure relief oil duct arranged in the constant-difference pressure reducing valve is connected with the left end of a second oil duct arranged in the transition plate, the right end of the second oil duct is connected with a pilot valve oil outlet cavity of the pilot valve through an oil duct, a second damping port is arranged at the right end of the first oil duct arranged in the transition plate, the right end of a third oil duct arranged in the transition plate is connected with a spring cavity of the pilot valve through a spring cavity oil duct, the other end of the third oil duct is connected with a second signal input port arranged on the transition plate, and a third damping port is arranged at the right end of the third oil duct arranged in the transition plate.
Further, the constant-differential pressure reducing valve comprises a main valve body, a constant-differential pressure reducing valve core, a pressure reducing spring seat and an end cover, wherein a pressure reducing valve core hole is formed in the main valve body, the constant-differential pressure reducing valve core is arranged in the middle and the left side of the pressure reducing valve core hole, the pressure reducing spring is arranged on the right side of the pressure reducing valve core hole, one end of the pressure reducing spring is located in a spring hole formed in the right end of the constant-differential pressure reducing valve core, the other end of the pressure reducing spring is connected with the pressure reducing spring seat, the pressure reducing spring seat is arranged at the right end of the pressure reducing valve core hole, the end cover is arranged at the left end of the main valve body, one end of a fifth oil duct arranged on the end cover is communicated with a damping hole formed in the left end of the constant-differential pressure reducing valve core, the other end of the fifth oil duct is connected with a fourth oil duct arranged on the main valve body, and a port of the other end of the fifth oil duct is provided with first damping.
Furthermore, a pressure oil port, a working oil port A, a working oil port B, an oil outlet T, a control port X and an oil drainage port Y are arranged on the top surface and the bottom surface of the valve body of the main valve body; a fourth oil duct is arranged on one side, adjacent to the end cover, of the main valve body, one end of the fourth oil duct is connected with an oil outlet cavity arranged in the main valve body, and the other end of the fourth oil duct is connected with a fifth oil duct arranged in the end cover; the main valve body is provided with a pressure reducing valve core hole, the middle of the pressure reducing valve core hole is provided with an oil inlet cavity and an oil outlet cavity, the oil inlet cavity and the oil outlet cavity are respectively connected with a bottom pressure oil port of the main valve body and a top pressure oil port of the main valve body, one side of the main valve body adjacent to the transition plate is provided with a pressure reducing oil duct, one end of the pressure reducing oil duct is connected with an oil drainage port Y, and the other end of the pressure reducing oil duct is connected with the left end of a second oil duct arranged in the transition plate.
Furthermore, a damping hole is formed in the left end of the fixed-difference pressure reducing valve core, a first central hole is formed in the fixed-difference pressure reducing valve core in the axial direction, the damping hole is communicated with the first central hole, four throttling grooves are formed in the shoulder of the fixed-difference pressure reducing valve core, an oil inlet cavity and an oil outlet cavity are formed in the main valve body in a communicated mode, and the opening degree of the valve port of the fixed-difference pressure reducing valve core is adjusted.
The pilot valve is composed of a pilot valve body, a pilot valve core, a pilot valve spring, a plug, an adjusting screw, a signal connector, a fourth damper, a pilot valve spring body, a first spring seat and a second spring seat, the pilot valve body is provided with a pilot valve core hole, the pilot valve core is arranged in the pilot valve core hole, the pilot valve spring body is internally provided with a spring cavity, the bottom of the spring cavity is provided with a screw hole, the adjusting screw is arranged in the screw hole, the first spring seat, the pilot valve spring and the second spring seat are sequentially arranged in the spring cavity, the opening end of the pilot valve spring body is connected with one end of the pilot valve body, which is provided with the screw hole, the plug is connected with the other end of the pilot valve body, which is provided with the plug hole, the signal connector is arranged in the screw hole formed by the plug, and the fourth damper is arranged in a damping oil duct formed by the signal connector.
Further, be equipped with the guide valve core hole in the guide valve body, the middle part in guide valve core hole is equipped with guide valve inlet chamber and guide valve oil outlet chamber, the one end of guide valve body is equipped with the one end intercommunication of plug screw hole and guide valve core hole, the other end of guide valve body is equipped with the screw hole and the screw hole of being connected with the guide valve spring body and communicates with the other end in guide valve core hole, still be equipped with oil inlet duct, oil outlet and spring chamber oil duct in the guide valve body, oil inlet duct and oil outlet are connected with guide valve inlet chamber and guide valve oil outlet chamber respectively, the one end and the guide valve spring chamber oil duct of spring chamber oil duct are connected, the other end and the third oil duct intercommunication that crosses and set up on the cab apron of spring chamber oil duct.
Furthermore, a screw hole is formed in the end face of the plug, a signal transmission oil hole is formed in the plug, and the screw hole is communicated with the end face, provided with a screw, of the plug through the signal transmission oil hole.
Furthermore, the signal joint comprises a damping oil duct and a first signal input port, and the damping oil duct is used for communicating the first signal input port with the screw hole of the plug.
The invention has the beneficial effects that:
by adopting the technical scheme, the fixed-differential pressure reducing valve and the pilot valve are combined to form a pilot type structure, the pilot valve performs signal comparison, and the fixed-differential pressure reducing valve performs pressure compensation, so that the signal comparison is not interfered by hydraulic force on the fixed-differential pressure reducing valve core, the adjustment precision is high, and the technical problems that the signal comparison of the existing pressure compensating valve is greatly interfered by hydraulic force of the main valve core and the adjustment precision is low are solved. In addition, the pilot valve core of the invention has smaller structure size, the pressure regulating spring of the pilot valve is not very strong, and the pressure is convenient to adjust. Therefore, compared with the background art, the invention has the advantages of no signal interference caused by the hydrodynamic force on the main valve core, high regulation precision, convenient pressure regulation, capability of meeting the requirement of constant low pressure difference and the like.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a sectional view A-A of FIG. 2;
FIG. 4 is a sectional view taken along line B-B of FIG. 2;
FIG. 5 is a top view of FIG. 2;
FIG. 6 is a bottom view of FIG. 2;
figure 7 is a schematic view of the pilot valve of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1 to 7, the large-flow pilot pressure compensation valve in this embodiment includes a constant-differential pressure reduction valve, a transition plate 6 and a pilot valve 7, where the constant-differential pressure reduction valve, the transition plate 6 and the pilot valve 7 are sequentially installed together, and the transition plate 6 is provided with a first oil passage 6.1, a second oil passage 6.2, a third oil passage 6.3 and a second signal input port 6.4; the central oil duct of a pressure reducing spring seat of the constant-differential pressure reducing valve 1 is connected with the left end of a first oil duct 6.1 arranged in a transition plate 6, the right end of the first oil duct 6.1 is connected with a pilot valve oil inlet cavity 7.8 of a pilot valve 7 through an oil duct, the pressure reducing oil duct arranged in the constant-differential pressure reducing valve is connected with the left end of a second oil duct 6.2 arranged in the transition plate 6, the right end of the second oil duct 6.2 is connected with a pilot valve oil outlet cavity 7.7 of the pilot valve 7 through an oil duct, a second damper 6.5 is arranged at a port at the right end of the first oil duct arranged in the transition plate 6, the right end of a third oil duct 6.3 arranged in the transition plate 6 is connected with a spring cavity of the pilot valve through a spring cavity oil duct, the other end of the third oil duct 6.3 is connected with a second signal input port 6.4 arranged on the transition plate 6, and a port at the right end of the third oil duct arranged in the transition plate 6 is provided with a third damper 6.6.
As shown in fig. 2, the constant-differential pressure reducing valve includes a main valve body 1, a constant-differential pressure reducing valve core 3, a pressure reducing spring 4, a pressure reducing spring seat 5 and an end cover 2, a pressure reducing valve core hole is arranged in the main valve body 1, the constant-differential pressure reducing valve core 3 is arranged at the middle part and the left side of the pressure reducing valve core hole, the pressure reducing spring 4 is arranged at the right side of the pressure reducing valve core hole, one end of the pressure reducing spring is arranged in a spring hole arranged at the right end of the constant-differential pressure reducing valve core 3, the other end of the pressure reducing spring seat is connected with the pressure reducing spring seat 5, the pressure reducing spring seat 5 is arranged at the right end of the pressure reducing valve core hole, the end cover 2 is arranged at the left end of the main valve body 1, one end of a fifth oil duct 2.1 arranged on the end cover 2 is communicated with a damping hole 10 arranged at the left end of the constant-differential pressure reducing valve core 3, the other end of the fifth oil duct 2.1 is connected with a fourth oil duct 8 arranged on the main valve body 1, and a port at the other end of the fifth oil duct 2.1 is provided with a first damping 9.
As shown in fig. 2, 5 and 6, the top surface and the bottom surface of the valve body of the main valve body 1 are respectively provided with a pressure oil port p1.1.2 and a pressure oil port p1.1.1, a working oil port a1.3, a working oil port B1.4, an oil outlet T1.2, a control port X1.5 and an oil drainage port Y11; a fourth oil duct 8 is arranged on one side, adjacent to the end cover 2, of the main valve body 1, one end of the fourth oil duct 8 is connected with an oil outlet cavity 12 arranged in the main valve body, and the other end of the fourth oil duct 8 is connected with a fifth oil duct 2.1 arranged on the end cover 2; the main valve body 1 is provided with a pressure reducing valve core hole, the middle of the pressure reducing valve core hole is provided with an oil inlet cavity 13 and an oil outlet cavity 12, the oil inlet cavity 13 and the oil outlet cavity 12 are respectively connected with a bottom surface pressure oil port P1.1.1 of the main valve body and a top surface pressure oil port P1.1.2 of the main valve body 1, one side of the main valve body 1 adjacent to the transition plate is provided with a pressure relief oil duct 14, one end of the pressure relief oil duct 14 is connected with an oil drainage port Y11, and the other end of the pressure relief oil duct is connected with the left end of a second oil duct 6.2 arranged in the transition plate 6.
As shown in fig. 2 and 4, a damping hole 10 is provided at the left end of the fixed-difference pressure reducing valve core 3, a first central hole 3.1 is provided in the axial direction of the fixed-difference pressure reducing valve core 3, the damping hole is communicated with the first central hole, four throttle grooves 3.2, i.e., 3.2.1-3.2.4 in fig. 4, are provided on the shoulder of the fixed-difference pressure reducing valve core 3, and an oil inlet cavity 13 and an oil outlet cavity 12 provided in the main valve body 1 are communicated for adjusting the opening degree of the valve port of the fixed-difference pressure reducing valve core 3.
As shown in fig. 3 and 7, the pilot valve 7 is composed of a pilot valve body 7.1, a pilot valve core 7.2, a pilot valve spring 7.3, a plug 7.4, an adjusting screw 7.5, a signal connector 7.6, a fourth damper 7.9, a pilot valve spring body 7.11, a first spring seat 7.12 and a second spring seat 7.10, a guide valve core hole is arranged in the guide valve body 7.1, the guide valve core 7.2 is arranged in the guide valve core hole, a spring cavity is arranged in the pilot valve spring body 7.11, a screw hole is arranged at the bottom of the spring cavity, the adjusting screw 7.5 is arranged in the screw hole, the first spring seat 7.12, the pilot valve spring 7.3 and the second spring seat 7.10 are arranged in the spring cavity in sequence, the opening end of the pilot valve spring body 7.11 is connected with one end of the pilot valve body 7.1 provided with a screw hole, the plug 7.4 is connected with the other end of the pilot valve body 7.1 provided with a plug hole, the signal connector 7.6 is arranged in the screw hole arranged on the plug 7.4, the fourth damper 7.9 is arranged in a damper oil passage 7.17 provided in the signal joint 7.6.
As shown in fig. 7, a pilot valve hole is arranged in the pilot valve body 7.1, a pilot valve oil inlet chamber 7.8 and a pilot valve oil outlet chamber 7.7 are arranged in the middle of the pilot valve hole, one end of the pilot valve body 7.1 is provided with a plug hole and the plug hole is communicated with one end of the pilot valve hole, the other end of the pilot valve body 7.1 is provided with a screw hole connected with the pilot valve spring body and the screw hole is communicated with the other end of the pilot valve hole, the pilot valve body 7.1 is further provided with an oil inlet channel 7.14, an oil outlet channel 7.13 and a spring chamber oil channel 7.15, the oil inlet channel 7.14 and the oil outlet channel 7.13 are respectively connected with the pilot valve oil inlet chamber 7.8 and the pilot valve oil outlet chamber 7.7, one end of the spring chamber oil channel 7.15 is connected with the pilot valve spring chamber, and the other end of the spring chamber oil channel 7.15 is communicated with a third oil channel 6.3 arranged on the transition plate 6. The screw plug is characterized in that a screw hole is formed in the end face of the screw plug 7.4, a signal transmission oil hole 7.16 is formed in the screw plug, and the screw hole is communicated with the end face, provided with threads, of the screw plug through the signal transmission oil hole 7.16.
The signal joint 7.6 comprises a damping oil channel 7.17 and a first signal input port 7.18, and the damping oil channel 7.17 is used for communicating the first signal input port 7.18 with a screw hole of the plug 7.4.
The working process of the invention is as follows:
as shown in fig. 1 to 7, the hydraulic control valve is a superposition valve structure and is mainly used in a superposition manner with a proportional directional valve, and a top pressure oil port P1.1.2, a working oil port A1.3, a working oil port B1.4, an oil outlet T1.2, a control port X1.5 and an oil drainage port Y11 of the hydraulic control valve are respectively connected with an oil inlet, a working oil port A, a working oil port B, an oil outlet T, a control port X and an oil drainage port Y on the bottom surface of the proportional directional valve. During actual work, a first signal input port 7.18 on the plug side of the pilot valve is connected with a pressure port P1.1.2 pressure P2 (namely the pressure of an oil inlet of the proportional directional valve) on the top surface of the fixed-difference pressure reducing valve, and a second signal input port 6.4 on the transition plate 7 is connected with the pressure of a working oil port A (or a working oil port B) of the proportional directional valve; suppose the pilot valve spring sets the pressure to 5bar, i.e. the pressure difference between the oil inlet pressure P2 of the proportional directional valve and the working oil port a (or the working oil port B) is 5 bar.
When the pressure difference between the oil inlet pressure P2 of the proportional directional valve and the pressure of the working oil port A (or the working oil port B) is larger than 5bar, namely the pressure difference between the pressure of the first signal input port 7.18 and the pressure of the second signal input port 6.4 is larger than 5bar, the pilot valve core is opened, and the oil on the spring side of the constant-difference pressure reducing valve core flows into the oil drainage port Y through the first oil duct 6.1, the pilot valve oil inlet cavity, the pilot valve oil outlet cavity, the second oil duct 6.2 and the pressure reducing oil duct 14. At the moment when the pilot valve core is opened, the fixed-differential pressure reducing valve core with the spring side pressure is communicated with the oil drainage port Y, the pressure drops suddenly, the spring-free side of the fixed-differential pressure reducing valve core does not sense the pressure change, the fixed-differential pressure reducing valve core moves to the right under the action of the pressure P2 of the top surface pressure oil port P1.1.2, the compensation valve port is closed, the throttling effect is increased, the pressure P2 of the top surface pressure oil port P1.1.2 is reduced, and the pressure difference between the pressure P2 of the oil inlet of the proportional directional valve and the pressure of the working oil port A (or the working oil port B) is reduced to 5 bar;
when the pressure difference between the oil inlet pressure P2 of the proportional directional valve and the pressure of the working oil port A (or the working oil port B) is less than 5bar, namely the pressure difference between the pressure of the first signal input port 7.18 and the pressure of the second signal input port 6.4 is less than 5bar, the pilot valve core cannot be opened, the fixed-difference pressure reducing valve core is tightly attached to the end cover under the action of the pressure reducing spring, the opening of the fixed-difference pressure reducing valve core reaches the maximum, the pressure P2 of the top pressure oil port P1.1.2 is increased, and therefore the pressure difference between the oil inlet pressure P2 of the proportional directional valve and the pressure of the working oil port A (or the working oil port B) is increased to 5 bar;
the pressure compensation process is a dynamic adjustment process, so that the pressure difference between the first signal input port 7.18 and the second signal input port 6.4 is always kept at the set pressure value of the pilot valve spring, i.e. the pressure difference between the oil inlet pressure P2 of the proportional directional valve and the pressure of the working port a (or the working port B) is always the set pressure value of the pilot valve spring.
Claims (8)
1. A large-traffic pilot-operated formula pressure compensating valve which characterized in that: the device comprises a constant-differential pressure reducing valve, a transition plate and a pilot valve, wherein the constant-differential pressure reducing valve, the transition plate and the pilot valve are sequentially arranged together, and the transition plate is provided with a first oil duct, a second oil duct, a third oil duct and a second signal input port; the central oil duct of a pressure reducing spring seat of the constant-difference pressure reducing valve is connected with the left end of a first oil duct arranged in a transition plate, the right end of the first oil duct is connected with a pilot valve oil inlet cavity of a pilot valve through an oil duct, a pressure relief oil duct arranged in the constant-difference pressure reducing valve is connected with the left end of a second oil duct arranged in the transition plate, the right end of the second oil duct is connected with a pilot valve oil outlet cavity of the pilot valve through an oil duct, a second damping port is arranged at the right end of the first oil duct arranged in the transition plate, the right end of a third oil duct arranged in the transition plate is connected with a spring cavity of the pilot valve through a spring cavity oil duct, the other end of the third oil duct is connected with a second signal input port arranged on the transition plate, and a third damping port is arranged at the right end of the third oil duct arranged in the transition plate.
2. A high flow pilot operated pressure compensating valve as defined in claim 1 wherein: the constant-differential pressure reducing valve comprises a main valve body, a constant-differential pressure reducing valve core, a pressure reducing spring seat and an end cover, wherein a pressure reducing valve core hole is formed in the main valve body, the constant-differential pressure reducing valve core is arranged in the middle and the left of the pressure reducing valve core hole, the pressure reducing spring is arranged on the right of the pressure reducing valve core hole, one end of the pressure reducing spring is located in a spring hole formed in the right end of the constant-differential pressure reducing valve core, the other end of the pressure reducing valve core is connected with the pressure reducing spring seat, the pressure reducing spring seat is arranged at the right end of the pressure reducing valve core hole, the end cover is arranged at the left end of the main valve body, one end of a fifth oil duct arranged on the end cover is communicated with a damping hole formed in the left end of the constant-differential pressure reducing valve core, the other end of the fifth oil duct is connected with a fourth oil duct arranged on the main valve body, and a first damping is arranged at the port of the other end of the fifth oil duct.
3. A high flow pilot pressure compensating valve according to claim 2, characterized in that: the top surface and the bottom surface of the valve body of the main valve body are respectively provided with a pressure oil port, a working oil port A, a working oil port B, an oil outlet T, a control port X and an oil drainage port Y; a fourth oil duct is arranged on one side, adjacent to the end cover, of the main valve body, one end of the fourth oil duct is connected with an oil outlet cavity arranged in the main valve body, and the other end of the fourth oil duct is connected with a fifth oil duct arranged in the end cover; the main valve body is provided with a pressure reducing valve core hole, the middle of the pressure reducing valve core hole is provided with an oil inlet cavity and an oil outlet cavity, the oil inlet cavity and the oil outlet cavity are respectively connected with a bottom pressure oil port of the main valve body and a top pressure oil port of the main valve body, one side of the main valve body adjacent to the transition plate is provided with a pressure reducing oil duct, one end of the pressure reducing oil duct is connected with an oil drainage port Y, and the other end of the pressure reducing oil duct is connected with the left end of a second oil duct arranged in the transition plate.
4. A high flow pilot operated pressure compensating valve as defined in claim 2 wherein: the left end of the fixed-difference pressure reducing valve core is provided with a damping hole, a first central hole is axially arranged on the fixed-difference pressure reducing valve core, the damping hole is communicated with the first central hole, four throttling grooves are arranged on the shoulder of the fixed-difference pressure reducing valve core and are communicated with an oil inlet cavity and an oil outlet cavity which are arranged on the main valve body, and the damping hole is used for adjusting the opening degree of a valve port of the fixed-difference pressure reducing valve core.
5. A high flow pilot operated pressure compensating valve as defined in claim 1 wherein: the pilot valve is composed of a pilot valve body, a pilot valve core, a pilot valve spring, a plug, an adjusting screw, a signal connector, a fourth damper, a pilot valve spring body, a first spring seat and a second spring seat, a pilot valve core hole is formed in the pilot valve body, the pilot valve core is arranged in the pilot valve core hole, a spring cavity is formed in the pilot valve spring body, a screw hole is formed in the bottom of the spring cavity, the adjusting screw is arranged in the screw hole, the first spring seat, the pilot valve spring and the second spring seat are sequentially arranged in the spring cavity, the opening end of the pilot valve spring body is connected with one end, provided with the screw hole, of the pilot valve body, the plug is connected with the other end, provided with the plug hole, of the pilot valve body, the signal connector is arranged in the screw hole formed in the plug, and the fourth damper is arranged in a damping oil duct formed in the signal connector.
6. A high flow pilot operated pressure compensating valve according to claim 5, characterized in that: the oil guide valve is characterized in that a guide valve core hole is formed in the guide valve body, a guide valve oil inlet cavity and a guide valve oil outlet cavity are formed in the middle of the guide valve core hole, a screw plug hole and a screw plug hole are formed in one end of the guide valve body and communicated with one end of the guide valve core hole, a screw hole and a screw hole which are connected with a guide valve spring body are formed in the other end of the guide valve body and communicated with the other end of the guide valve core hole, an oil inlet channel, an oil outlet channel and a spring cavity oil channel are further formed in the guide valve body, the oil inlet channel and the oil outlet channel are respectively connected with the guide valve oil inlet cavity and the guide valve oil outlet cavity, one end of the spring cavity oil channel is connected with the guide valve spring cavity, and the other end of the spring cavity oil channel is communicated with a third oil channel arranged on the transition plate.
7. A high flow pilot operated pressure compensating valve according to claim 5, characterized in that: the screw plug is characterized in that a screw hole is formed in the end face of the screw plug, a signal transmission oil hole is formed in the screw plug, and the screw hole is communicated with the end face, provided with a screw, of the screw plug through the signal transmission oil hole.
8. A high flow pilot pressure compensating valve according to claim 5, wherein: the signal joint comprises a damping oil duct and a first signal input port, and the damping oil duct communicates the first signal input port with the screw hole of the plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914025.7A CN115095696B (en) | 2022-08-01 | 2022-08-01 | High-flow pilot-operated pressure compensation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914025.7A CN115095696B (en) | 2022-08-01 | 2022-08-01 | High-flow pilot-operated pressure compensation valve |
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| Publication Number | Publication Date |
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| CN115095696A true CN115095696A (en) | 2022-09-23 |
| CN115095696B CN115095696B (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210914025.7A Active CN115095696B (en) | 2022-08-01 | 2022-08-01 | High-flow pilot-operated pressure compensation valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161373A (en) * | 1990-06-22 | 1992-11-10 | Zexel Corporation | Hydraulic control valve system |
| JPH09178011A (en) * | 1995-12-22 | 1997-07-11 | Toyooki Kogyo Co Ltd | Pressure compensated flow control valve |
| CN103644158A (en) * | 2013-12-26 | 2014-03-19 | 太重集团榆次液压工业有限公司 | Electromagnetic pilot sliding valve-type hydraulic reversing valve |
| CN106704283A (en) * | 2017-02-17 | 2017-05-24 | 洛阳理工学院 | Low-loss damping pilot-type sequence valve |
| CN208719483U (en) * | 2018-09-12 | 2019-04-09 | 徐州徐工液压件有限公司 | A kind of novel compensation valve arrangement |
| CN209876024U (en) * | 2019-04-16 | 2019-12-31 | 江苏恒立液压科技有限公司 | Hydraulic transmission device and engineering machinery with same |
| CN211693008U (en) * | 2020-01-14 | 2020-10-16 | 申忠玉 | Load feedback pressure compensation pilot valve |
| CN114165493A (en) * | 2020-08-23 | 2022-03-11 | 申忠玉 | Interlocking type pressure compensation pressure reduction valve type pilot valve control system |
-
2022
- 2022-08-01 CN CN202210914025.7A patent/CN115095696B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161373A (en) * | 1990-06-22 | 1992-11-10 | Zexel Corporation | Hydraulic control valve system |
| JPH09178011A (en) * | 1995-12-22 | 1997-07-11 | Toyooki Kogyo Co Ltd | Pressure compensated flow control valve |
| CN103644158A (en) * | 2013-12-26 | 2014-03-19 | 太重集团榆次液压工业有限公司 | Electromagnetic pilot sliding valve-type hydraulic reversing valve |
| CN106704283A (en) * | 2017-02-17 | 2017-05-24 | 洛阳理工学院 | Low-loss damping pilot-type sequence valve |
| CN208719483U (en) * | 2018-09-12 | 2019-04-09 | 徐州徐工液压件有限公司 | A kind of novel compensation valve arrangement |
| CN209876024U (en) * | 2019-04-16 | 2019-12-31 | 江苏恒立液压科技有限公司 | Hydraulic transmission device and engineering machinery with same |
| CN211693008U (en) * | 2020-01-14 | 2020-10-16 | 申忠玉 | Load feedback pressure compensation pilot valve |
| CN114165493A (en) * | 2020-08-23 | 2022-03-11 | 申忠玉 | Interlocking type pressure compensation pressure reduction valve type pilot valve control system |
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|---|---|
| CN115095696B (en) | 2024-05-24 |
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