CN109469660B - Double-valve-core control synchronous valve - Google Patents

Abstract

A dual valve core control synchronizing valve comprises a valve body, an oil inlet cavity is arranged at the lower part of the valve body, a main valve core is arranged in the oil inlet cavity, the valve body is provided with an oil inlet port under the oil inlet chamber, and the valve body is arranged in the upper part of the The left oil outlet and the right oil outlet are respectively on the two sides. The left oil outlet is communicated with the oil inlet chamber through the left channel, and the right oil outlet is communicated with the oil inlet chamber through the right channel. The valve body is provided with a left oil chamber above the left channel. , There is a right oil cavity above the right channel; the left oil cavity and the right oil cavity are provided with oil outlet valve cores; the upper ends of the left oil cavity and the right oil cavity are through holes, and the through holes are provided with oil outlet sealing bolts. There is a spring between the oil sealing bolt and the oil outlet valve core, the left and right ends of the main valve core are respectively provided with pistons, the oil inlet cavity is a hollow hole, the left and right ends of the oil inlet chamber are respectively provided with oil inlet sealing bolts, and the oil inlet sealing A feedback gap is left between the bolt and the piston, and a spring is arranged between the oil inlet sealing bolt at at least one end of the oil inlet chamber and the piston. The invention improves the control precision, greatly saves the cost and improves the work efficiency.

Description

A dual spool control synchronizing valve

technical field

The invention relates to the technical field of synchronization valves, in particular to a dual valve core control synchronization valve.

Background technique

The synchronizing valve is used to ensure that two or more actuators (hydraulic cylinders or hydraulic motors) can still obtain the same or a certain proportion of flow under different loads, so that the actuators have the same displacement or the same flow. A hydraulic component of speed movement, the synchronizing valve is used to synchronize the lifting mechanism. In the use of the synchronous hoisting mechanism, a hydraulic valve is basically used to control an actuator. During the hoisting process, due to different working resistances, the lifting of the pillars is asynchronous, which causes the speed to be asynchronous and affects the movement accuracy. The typical structures of traditional synchronizing valves are hook type and reversing piston type. Experts and scholars at home and abroad have devoted themselves to the research on the structure and performance of traditional synchronizing valves for many years, but their basic structure has not changed fundamentally so far. In recent years, many scholars' research on synchronous valve is mostly limited to the theoretical knowledge framework established by scholars in the 1980s. The main research contents are two aspects:

(1) Factors affecting the steady-state and dynamic performance of the synchronizing valve and improvements to the structure of the synchronizing valve;

(2) Application analysis of synchronization valve such as trailer drilling rig and frame car.

However, the development of modern processing technology has not significantly improved the performance of the traditional synchronous valve, because the flow of the traditional synchronous valve is only approximately equal, and there is an error in principle, which will not be infinitely reduced due to the improvement of processing accuracy. small or eliminated.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a dual valve core control synchronization valve to solve the problem of low synchronization accuracy of the synchronization valve, improve the control accuracy, greatly save costs, and improve work efficiency.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A dual valve core control synchronizing valve, comprising a valve body, an oil inlet cavity is arranged in the lower part of the valve body, a main valve core is arranged in the oil inlet cavity, the valve body is provided with an oil inlet port under the oil inlet cavity, and the valve body is provided with an oil inlet at the upper part. The left oil outlet and the right oil outlet are respectively provided on both sides. The left oil outlet communicates with the oil inlet chamber through the left channel, and the right oil outlet communicates with the oil inlet chamber through the right channel. The valve body has a left oil outlet above the left channel. The oil cavity is provided with a right oil cavity above the right channel; the left oil cavity and the right oil cavity are provided with oil outlet valve cores; the upper ends of the left oil cavity and the right oil cavity are through holes, and the through holes are provided with oil outlet sealing bolts There is a spring between the oil outlet sealing bolt and the oil outlet valve core, and the valve body is provided with a three-way check valve between the left oil cavity and the right oil cavity, and the first inlet of the three-way check valve is communicated with the left oil cavity, The second inlet is communicated with the right oil chamber, the outlet is communicated with the through holes at the upper ends of the left oil chamber and the right oil chamber respectively, the left and right ends of the main spool are respectively provided with pistons, the oil inlet chamber is a hollow hole, and the left and right sides of the oil inlet chamber are respectively provided with pistons. There are oil inlet sealing bolts at the ends respectively, there is a feedback gap between the oil inlet sealing bolt and the piston, and a spring is arranged between the oil inlet sealing bolt and the piston at at least one end of the oil inlet chamber, and the left channel passes through the left feedback channel and the oil inlet chamber. The feedback gap at the left end is communicated, and the right channel is communicated with the feedback gap at the right end of the oil inlet cavity through the right feedback channel.

It can be seen from the above that when the present invention is in use, the main spool is in the middle of the oil inlet cavity at the beginning. When the oil inlet has a certain pressure of oil, the oil flows out from the oil outlet openings on both sides of the main spool, and pushes it open. The oil outlet spools of the left oil chamber and the right oil chamber flow out from the left oil outlet and the right oil outlet; when the pressure on one side of the left oil outlet and the right oil outlet is high, the tee The sealing steel ball of the one-way valve is pushed to the other side, and the oil on the high-pressure side will pass through the three-way one-way valve and enter the through holes at the upper end of the left oil chamber and the right oil chamber, thereby reducing the opening of the oil outlet valve core. , reduce the outflow of oil, keep the pressure of the left oil outlet and the right oil outlet consistent, so as to keep the movement displacement or speed of the actuator driven by the oil pressure of the left oil outlet and the right oil outlet respectively. In the above case, since the pressures of the left oil outlet and the right oil outlet are not the same, the pressure will act on both sides of the main spool through the left feedback channel and the right feedback channel, and the main spool will have pressure on both sides. If they are not the same, move to the lower pressure side, reduce the pressure of the oil outlet on the lower pressure side, and further adjust the pressure of the left oil outlet and the right oil outlet, so as to further ensure the displacement or speed of the actuator. to complete the synchronization.

As an improvement of the present invention, a spring is arranged between the oil inlet sealing bolt at the left end of the oil inlet chamber and the piston, and a threaded through hole is provided in the middle of the oil inlet sealing bolt at the left end of the oil inlet chamber, and the threaded through hole There is a pre-tightening bolt, and the inner end of the pre-tightening bolt is in contact with the spring.

As an improvement of the present invention, a sealing gasket is provided between the oil inlet sealing bolt and the valve body.

As an improvement of the present invention, the valve body is provided with a first pressure relief hole communicating with the outlet of the three-way check valve, and the first pressure relief hole is provided with a first pressure relief sealing bolt.

As an improvement of the present invention, the valve body is respectively provided with a second pressure relief hole communicated with the left feedback channel and a third pressure relief hole communicated with the right feedback channel, and the second pressure relief hole is provided with The second pressure relief sealing bolt is provided with a third pressure relief sealing bolt on the third pressure relief hole.

Compared with the prior art, the innovation and beneficial effects of the technical solution of the present invention are:

In the present invention, the three-way one-way valve is arranged to keep the pressure of the left oil outlet and the right oil outlet consistent, so as to keep the movement displacement or speed of the actuators driven by the oil pressure of the left oil outlet and the right oil outlet respectively. ;

At the same time, through the left feedback channel and the right feedback channel acting on both sides of the main spool, the main spool will move to the side with lower pressure when the pressure on both sides is different, reducing the pressure on the side with lower pressure The pressure of the oil outlet can further adjust the pressure of the left oil outlet and the right oil outlet, so as to further ensure the displacement or speed of the actuator and complete the synchronization work;

The invention not only improves the synchronization precision of the synchronization valve, but also improves the control precision, greatly saves the cost and improves the work efficiency.

Description of drawings

FIG. 1 is a schematic diagram of the dual spool control synchronizing valve of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all of the contents related to the present invention.

Example

Referring to FIG. 1 , a dual-spool control synchronizing valve includes a valve body 10 , an oil inlet chamber 11 is arranged at the lower part of the valve body 10 , a main valve core 20 is arranged in the oil inlet chamber 11 , and the valve body 10 is located in the oil inlet chamber 11 . An oil inlet 12 is provided at the bottom, and a left oil outlet 13 and a right oil outlet 14 are respectively provided on the two sides of the upper part of the valve body 10. The left oil outlet 13 communicates with the oil inlet chamber 11 through the left channel 15, and the right oil outlet The port 14 communicates with the oil inlet chamber 11 through the right channel 16. The valve body 10 is provided with a left oil chamber 17 above the left channel 15 and a right oil chamber 18 above the right channel 16; Equipped with oil outlet valve core 40;

The upper ends of the left oil chamber 17 and the right oil chamber 18 are through holes. The through holes are provided with oil outlet sealing bolts 42. A spring 41 is arranged between the oil outlet sealing bolts 42 and the oil outlet valve core 40. A three-way check valve 60 is provided between the cavity 17 and the right oil cavity 18. The first inlet 61 of the three-way check valve 60 communicates with the left oil cavity 17, the second inlet 62 communicates with the right oil cavity 18, and the outlet 63 communicates with the left oil cavity 17. The through holes at the upper ends of the left oil chamber 17 and the right oil chamber 18 communicate with each other, the left and right ends of the main spool 20 are respectively provided with pistons 30, the oil inlet chamber 11 is a hollow hole, and the left and right ends of the oil inlet chamber 11 are respectively provided with oil inlets The sealing bolt 50 has a feedback gap between the oil inlet sealing bolt 50 and the piston 30. A spring 51 is provided between the oil inlet sealing bolt 50 and the piston at at least one end of the oil inlet chamber 11. The left channel 15 communicates with the inlet through the left feedback channel 151. The feedback gap at the left end of the oil chamber 11 is in communication, and the right channel 16 is communicated with the feedback gap at the right end of the oil inlet chamber 11 through the right feedback channel 161 .

It can be seen from the above that when the present invention is in use, the main spool is in the middle of the oil inlet cavity at the beginning. When the oil inlet has a certain pressure of oil, the oil flows out from the oil outlet openings on both sides of the main spool, and pushes it open. The oil outlet spools of the left oil chamber and the right oil chamber flow out from the left oil outlet and the right oil outlet; when the pressure on one side of the left oil outlet and the right oil outlet is high, the tee The sealing steel ball of the one-way valve is pushed to the other side, and the oil on the high-pressure side will pass through the three-way one-way valve and enter the through holes at the upper end of the left oil chamber and the right oil chamber, thereby reducing the opening of the oil outlet valve core. , reduce the outflow of oil, keep the pressure of the left oil outlet and the right oil outlet consistent, so as to keep the movement displacement or speed of the actuator driven by the oil pressure of the left oil outlet and the right oil outlet respectively. In the above case, since the pressures of the left oil outlet and the right oil outlet are not the same, the pressure will act on both sides of the main spool through the left feedback channel and the right feedback channel, and the main spool will have pressure on both sides. If they are not the same, move to the lower pressure side, reduce the pressure of the oil outlet on the lower pressure side, and further adjust the pressure of the left oil outlet and the right oil outlet, so as to further ensure the displacement or speed of the actuator. to complete the synchronization.

In this embodiment, a spring 51 is provided between the oil inlet sealing bolt 50 at the left end of the oil inlet chamber 11 and the piston 30, and a threaded through hole is provided in the middle of the oil inlet sealing bolt 50 at the left end of the oil inlet chamber 11. A pre-tightening bolt 52 is arranged in the threaded through hole, and the inner end of the pre-tightening bolt 52 is in contact with the spring 51 . The oil inlet sealing bolt and the pre-tightening bolt are used together, which can not only play a sealing role, but also adjust the tightness of the main spool.

In this embodiment, a sealing washer 53 is provided between the oil inlet sealing bolt 50 and the valve body 10 . The oil inlet chamber is further sealed with a sealing gasket.

In this embodiment, the valve body 10 is provided with a first pressure relief hole communicating with the outlet of the three-way check valve 60 , and the first pressure relief hole is provided with a first pressure relief sealing bolt 64 . The hydraulic oil in the through holes at the upper ends of the left oil chamber and the right oil chamber can be released from the pressure through the first pressure relief hole.

In this embodiment, the valve body 10 is respectively provided with a second pressure relief hole communicated with the left feedback channel 151 and a third pressure relief hole communicated with the right feedback channel 161. The second pressure relief hole is provided with There is a second pressure relief seal bolt 152, and a third pressure relief seal bolt 162 is provided on the third pressure relief hole. The hydraulic oil in the feedback channel can be released from the pressure through the second pressure relief hole and the third pressure relief hole.

Compared with the prior art, the innovation and beneficial effects of the technical solution of the present invention are:

In the present invention, the three-way one-way valve is arranged to keep the pressure of the left oil outlet and the right oil outlet consistent, so as to keep the movement displacement or speed of the actuators driven by the oil pressure of the left oil outlet and the right oil outlet respectively. ;

At the same time, through the left feedback channel and the right feedback channel acting on both sides of the main spool, the main spool will move to the side with lower pressure when the pressure on both sides is different, reducing the pressure on the side with lower pressure The pressure of the oil outlet can further adjust the pressure of the left oil outlet and the right oil outlet, so as to further ensure the displacement or speed of the actuator and complete the synchronization work;

The invention not only improves the synchronization precision of the synchronization valve, but also improves the control precision, greatly saves the cost and improves the work efficiency.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a dual case control synchro valve, includes the valve body, and the valve body lower part is equipped with the oil feed chamber, is equipped with main valve core, its characterized in that in the oil feed chamber: an oil inlet is formed below the oil inlet cavity of the valve body, a left oil outlet and a right oil outlet are respectively formed in two side faces of the upper portion of the valve body, the left oil outlet is communicated with the oil inlet cavity through a left channel, the right oil outlet is communicated with the oil inlet cavity through a right channel, a left oil cavity is formed above the left channel of the valve body, and a right oil cavity is formed above the right channel of the valve body; oil outlet valve cores are arranged in the left oil cavity and the right oil cavity; the upper ends of the left oil cavity and the right oil cavity are through holes, oil outlet sealing bolts are arranged on the through holes, springs are arranged between the oil outlet sealing bolts and the oil outlet valve core, a three-way check valve is arranged between the left oil cavity and the right oil cavity of the valve body, a first inlet of the three-way check valve is communicated with the left oil cavity, a second inlet of the three-way check valve is communicated with the right oil cavity, outlets of the three-way check valve are respectively communicated with the through holes in the upper ends of the left oil cavity and the right oil cavity, pistons are respectively arranged at the left end and the right end of the main valve core, the oil inlet cavity is a hollow hole, oil inlet sealing bolts are respectively arranged at the left end and the right end of the oil inlet cavity, a feedback gap is reserved between the oil inlet sealing bolts and the pistons, the springs are arranged between the oil inlet sealing bolts at.

2. The dual spool controlled synchronous valve of claim 1, wherein: a spring is arranged between the oil inlet sealing bolt at the left end of the oil inlet cavity and the piston, a threaded through hole is formed in the middle of the oil inlet sealing bolt at the left end of the oil inlet cavity, a pre-tightening bolt is arranged in the threaded through hole, and the inner end of the pre-tightening bolt is in contact pressure with the spring.

3. The dual spool controlled synchronous valve of claim 1, wherein: and a sealing gasket is arranged between the oil inlet sealing bolt and the valve body.

4. The dual spool controlled synchronous valve of claim 1, wherein: the valve body is provided with a first pressure relief hole communicated with an outlet of the three-way one-way valve, and the first pressure relief hole is provided with a first pressure relief sealing bolt.

5. The dual spool controlled synchronous valve of claim 1, wherein: and a second pressure relief hole communicated with the left feedback channel and a third pressure relief hole communicated with the right feedback channel are respectively formed in the valve body, a second pressure relief sealing bolt is arranged on the second pressure relief hole, and a third pressure relief sealing bolt is arranged on the third pressure relief hole.

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