CN214247840U - Buffer device and sequence valve - Google Patents
Buffer device and sequence valve Download PDFInfo
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- CN214247840U CN214247840U CN202120120764.XU CN202120120764U CN214247840U CN 214247840 U CN214247840 U CN 214247840U CN 202120120764 U CN202120120764 U CN 202120120764U CN 214247840 U CN214247840 U CN 214247840U
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- buffer
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- sequence valve
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Abstract
The invention provides a buffer device and a sequence valve, and relates to the technical field of hydraulic valves. A cushioning device, comprising: the buffer valve core is provided with a first through hole for the circulation of hydraulic oil; the buffer sheet is positioned on one side of the buffer valve core, a gap is formed between the buffer valve core and the buffer sheet, the buffer sheet is connected with the buffer valve core through a return spring, and the buffer sheet is vertical to the axis of the first through hole; when pressure difference exists between the two sides of the buffer device, the buffer sheet is close to the buffer valve core along the axis direction of the first through hole, and the flow of hydraulic oil in the first through hole is reduced. A sequence valve comprises the buffer device. According to the invention, the buffer device is arranged in the sequence valve, so that the high-pressure and high-speed oil liquid can not quickly push the oil cylinder at the moment of opening the sequence valve, and the abnormal sound can not be generated at the same time.
Description
Technical Field
The invention belongs to the technical field of sequence valves, and particularly relates to a buffering device and a sequence valve.
Background
The sequence valve is a kind of pressure control valve, and its main function is to use pressure as signal, and automatically connect or cut off a certain oil circuit under the action of a certain control pressure, and the sequence valve is equivalent to a hydraulic switch.
Chinese patent publication No. CN101519972B discloses a sequence valve. The sequence valve comprises a liquid inlet opening device, a liquid return opening device and a valve body, wherein the liquid inlet opening device and the liquid return opening device are connected with the valve body through threads, and a liquid inlet and a liquid outlet are formed in the valve body; the liquid inlet opening device is formed by sequentially installing a pressure regulating plug, a threaded sleeve, a large return spring, a piston, a liquid inlet valve core, a small return spring, a guide sleeve and a liquid inlet valve seat, and the liquid return opening device is formed by sequentially installing an end guide sleeve, a small return spring, a liquid return valve core and a liquid return valve seat.
The sequence valve for the telescopic boom of the engineering machinery arm-folding crane is matched with a common self-holding unloading sequence valve, when the sequence valve works, the pressure of the sequence valve reaches the set pressure, the oil cylinder drives the boom to extend out, and due to the valve core structure of the sequence valve, high-pressure and high-speed hydraulic oil can push the oil cylinder to extend out forwards quickly and is not controlled and can make a sound at the same time when the sequence valve is opened. For the working condition that accurate hoisting is needed, the sequence valve has potential safety hazard.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a buffer device and a sequence valve using the buffer device, and can reduce abnormal sound and reduce the extending speed of a hydraulic oil cylinder on the premise of realizing the function of a common self-holding unloading sequence valve.
The purpose of the invention can be realized by the following technical scheme: a cushioning device, comprising: the buffer valve core is provided with a first through hole for the circulation of hydraulic oil; the buffer sheet is positioned on one side of the buffer valve core, a gap is formed between the buffer valve core and the buffer sheet, the buffer sheet is connected with the buffer valve core through a return spring, and the buffer sheet is vertical to the axis of the first through hole; when pressure difference exists between two sides of the buffer device, the buffer sheet is close to the buffer valve core along the axial direction of the first through hole, and the flow of hydraulic oil in the first through hole is reduced.
As a further improvement of the invention, a second through hole is arranged in the center of the buffer valve core, and a plurality of first through holes are annularly arranged on the edge of the second through hole around the axis of the second through hole.
As a further improvement of the present invention, the second through hole is a stepped hole, the stepped hole has a stepped surface, one end of the return spring is disposed on the stepped surface, and the other end of the return spring is connected to the buffer sheet.
As a further improvement of the invention, the buffer plate further comprises a compression bolt, the buffer plate is provided with a third through hole, and the compression bolt is inserted into the return spring through the third through hole.
As a further improvement of the present invention, the sealing device further comprises a sealing bolt, the sealing bolt is opposite to the pressing bolt, and the sealing bolt is inserted into the first through hole and used for sealing the first through hole.
The invention also provides a sequence valve, which comprises any one of the buffer devices and a valve body, wherein a hydraulic oil circulation channel is arranged in the valve body, the buffer device is positioned in the circulation channel, the two ends of the circulation channel are respectively provided with a liquid inlet and a liquid outlet, a buffer sheet in the buffer device is close to the liquid inlet, and a buffer valve core in the buffer device is close to the liquid outlet.
As a further improvement of the invention, the sequence valve core insert is provided with a liquid inlet valve port and a liquid outlet valve port, wherein the liquid inlet valve port is communicated with the liquid inlet, and the liquid outlet valve port is communicated with the buffer valve core.
As a further improvement of the invention, the liquid inlet and the liquid outlet are coaxial, and the axis of the sequence valve inserting core is parallel to the axis of the liquid outlet.
As a further improvement of the invention, the sequence valve further comprises a one-way valve, wherein the one-way valve is arranged in the valve body and is connected with the sequence valve insertion core in parallel.
As a further improvement of the invention, the valve further comprises two process plugs, two process holes are formed in the side wall of the valve body, and the process plugs are connected with the process holes through threads.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
1. because the buffer valve core is connected with the buffer sheet by the reset spring, when the pressure on one side of the buffer sheet is larger, the buffer sheet can press the buffer valve core, thereby reducing the flow passing through the buffer valve core;
2. the second through hole is a stepped hole, so that the return spring can be better installed and fixed;
3. the first through hole is arranged at intervals to form a circle by taking the second through hole as the center, so that the buffer valve core is stressed more uniformly, and the service life of the buffer valve core is prolonged;
4. a compression bolt and a sealing bolt are arranged in the buffer device and used for sealing the second through hole, so that the buffer valve core cannot penetrate through the second through hole;
5. the sequence valve using the buffer device is provided, so that when the sequence valve is opened, high-pressure oil cannot instantly flow to a liquid outlet, and impact and abnormal sound are reduced;
6. the sequence valve is internally provided with a one-way valve which is connected with the sequence valve inserting core in parallel, so that the sequence valve is quicker in speed and smaller in pressure loss during oil return.
Drawings
FIG. 1 is a cross-sectional view of a cushioning device of the present invention.
Fig. 2 is a left side view of the cushioning device of the present invention.
Fig. 3 is a hydraulic schematic of the damping device of the present invention.
FIG. 4 is a front view of the sequence valve of the present invention.
FIG. 5 is a cross-sectional view of the sequence valve of the present invention.
FIG. 6 is a hydraulic schematic of the sequence valve of the present invention.
In the figure, 110, a damper spool; 111. a second through hole; 112. a first through hole; 113. a step surface; 120. a buffer sheet; 121. a third through hole; 130. a return spring; 140. a hold-down bolt; 150. a seal bolt; 200. a valve body; 210. a liquid inlet; 220. a liquid outlet; 230. a liquid inlet cavity; 240. a liquid outlet cavity; 300. a sequence valve core is inserted; 310. pressure regulating pipe plugs; 320. a threaded sleeve; 330. a first spring; 340. a piston; 350. a second spring; 360. a liquid inlet valve core; 400. a one-way valve.
Detailed Description
The following is a specific embodiment of the present invention, and the technical solution of the present invention is further described with reference to fig. 1 to 6, but the present invention is not limited to this embodiment.
As shown in fig. 1 and 2, the present invention provides a buffer device including: the damper core 110, the damping sheet 120, the return spring 130, the hold-down bolt 140, and the seal bolt 150. When a pressure difference exists between two sides of the damper device and the pressure on one side of the buffer sheet 120 is relatively large, the buffer sheet 120 presses against the damper valve core 110, thereby reducing the flow rate passing through the damper valve core 110.
Specifically, a second through hole 111 is formed in the center of the damper valve body 110, and a first through hole 112 is formed around the second through hole 111. The second through hole 111 is provided as a stepped hole. The second through hole 111 is provided as a stepped hole so that the return spring 130 can be better mounted and fixed.
Further, the first through holes 112 are arranged at intervals around the second through hole 111 to form a circle, and the number of the first through holes 112 in this embodiment is 6. The plurality of first through holes 112 are uniformly distributed on the outer side of the second through hole 111, so that when oil passes through the damper valve core 110, the stress of the damper valve core 110 is relatively uniform, and the service life of the damper valve core is longer.
Specifically, the buffer sheet 120 is disposed at one side of the buffer valve core 110, a gap exists between the buffer sheet 120 and the buffer valve core 110, and the buffer sheet 120 is perpendicular to the axis of the first through hole 112; the buffer sheet 120 is a circular sheet with a third through hole 121 in the center. The provision of the damping plate 120 may reduce the flow rate of the first through hole 112 when a large pressure difference exists between both sides of the damper spool 110.
Specifically, one end of the return spring 130 is disposed on the stepped surface 113 of the stepped hole, and the other end of the return spring abuts against the buffer sheet 120. When the pressure difference between the two sides of the damper spool 110 does not exist, the return spring 130 drives the damping plate 120 to return to the initial position.
Specifically, the pressing bolt 140 is inserted into the return spring 130 through the third through hole 121; the sealing bolt 150 is disposed opposite to the pressing bolt 140, and the sealing bolt 150 is inserted into the stepped hole. The compression bolt 140 and the sealing bolt 150 are arranged so that the second through hole 111 has good sealing performance.
As shown in fig. 1 and 3, the operation of the damping device is as follows:
1. when the sequential valve core is opened, high-speed and high-pressure oil rushes to one side of the buffer device, which is provided with the buffer sheet 120;
2. a large pressure difference exists between the two sides of the damper valve core 110, so that the damping sheet 120 compresses the return spring 130 and moves towards the end surface of the damper valve core 110 until the pressure difference is equal to the elastic force of the return spring 130, and at this time, because the gap between the damper valve core 110 and the damping sheet 120 is small, the flow of high-pressure oil passing through the first through hole 112 can be reduced, and the impact is reduced;
3. as the pressure difference between the two sides of the damper valve core 110 is reduced, the return spring 130 drives the damping sheet 120 to gradually move to the initial position; when the pressure difference between both sides of the damper spool 110 does not exist, the damping plate 120 is restored to the initial position.
As shown in fig. 4 to 6, the present invention also provides a sequence valve, including the damping device, further including: valve body 200, sequence valve insert core 300. The valve body 200 is provided with a liquid inlet 210 and a liquid outlet 220, the liquid outlet 220 is communicated with the buffer device, the sequence valve insert core 300 is arranged in the valve body 200, one end of the sequence valve insert core is communicated with the liquid inlet 210, and the other end of the sequence valve insert core is communicated with the buffer device. Because the sequence valve applies the buffer device, when the sequence valve insertion core 300 is opened, high-pressure and high-speed oil cannot instantly flow to the liquid outlet 220 to quickly push the oil cylinder, so that impact and abnormal sound are reduced, and the oil cylinder is more controllable.
Specifically, the sequence valve insert 300 is formed by sequentially installing a pressure regulating plug 310, a threaded sleeve 320, a first spring 330, a piston 340, a second spring 350 and a liquid inlet valve core 360. The valve body 200 is provided with a liquid inlet cavity 230 and a liquid outlet cavity 240, the liquid inlet cavity 230 is communicated with the liquid inlet 210, and the liquid outlet cavity 240 is communicated with the buffer device.
The sequence valve insert core 300 works as follows:
hydraulic oil enters the liquid inlet cavity 230 from the liquid inlet 210, oil pressure acts on the liquid inlet valve core 360, when pressure acting on the liquid inlet valve core 360 is larger than resultant force of elastic force of the first spring 330 and the second spring 350 (100 bar in the embodiment), the liquid inlet valve core 360 moves towards the pressure regulating plug 310, the sequence valve plug core 300 is opened, the oil enters the liquid outlet cavity 240 from the liquid inlet cavity 230, once the oil enters the liquid outlet cavity 240, oil pressure acts on the piston 340, and when the oil pressure is larger than the elastic force of the first spring 330, the sequence valve plug core 300 can be maintained to be opened, so that the opening state of the sequence valve core 300 can be maintained only by small oil pressure, and 5-6bar in the embodiment. By adjusting the position of the plug 310, the amount of precompression of the first spring can be adjusted, thereby adjusting the pressure at which the sequential valve cartridge 300 is maintained open.
Further, the sequence valve also comprises a one-way valve 400, and the one-way valve 400 is connected with the sequence valve insertion core 300 in parallel. When the oil return is performed, the hydraulic oil does not pass through the sequence valve insertion core 300, so that the oil return speed is higher.
Further, the liquid inlet 210 is coaxial with the liquid outlet 220, and the axis of the sequence valve core insert 300 is parallel to the axis of the liquid outlet 220. This arrangement makes the sequence valve of the present invention more compact.
Specifically, the sequence valve further comprises two process plugs, two process holes are formed in the side wall of the valve body 200, and the process plugs are connected with the process holes through threads.
In summary, the present embodiment has at least the following beneficial effects:
1. due to the structure of the sequence valve insert core 300, once the sequence valve insert core 300 is opened, the sequence valve is automatically unloaded, and the open state of the sequence valve can be maintained only by 5-6bar of pressure;
2. the sequence valve is provided with a buffer device, so that high-pressure and high-speed oil cannot instantly flow to the liquid outlet 220 after the sequence valve is opened, the oil cylinder is quickly pushed, impact and abnormal sound are reduced, and the oil cylinder is more controllable;
3. the sequence valve insertion core 300 is connected with the check valve 400 in parallel, so that oil does not need to pass through the sequence valve insertion core 300 during oil return, and the oil return speed is higher.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A cushioning device, comprising:
the buffer valve core is provided with a first through hole for the circulation of hydraulic oil;
the buffer sheet is positioned on one side of the buffer valve core, a gap is formed between the buffer valve core and the buffer sheet, the buffer sheet is connected with the buffer valve core through a return spring, and the buffer sheet is vertical to the axis of the first through hole;
when pressure difference exists between two sides of the buffer device, the buffer sheet is close to the buffer valve core along the axial direction of the first through hole, and the flow of hydraulic oil in the first through hole is reduced.
2. A damper device according to claim 1, wherein the damper spool is provided with a second through hole at the center thereof, and a plurality of the first through holes are provided in a ring shape around the axis of the second through hole at the edge thereof.
3. A buffer device according to claim 2, wherein said second through hole is a stepped hole having a stepped surface, and said return spring has one end disposed on said stepped surface and the other end connected to said buffer plate.
4. A damping device according to claim 3, further comprising a press bolt, wherein said damping plate has a third through hole, and said press bolt is inserted into said return spring through said third through hole.
5. The cushion device according to claim 4, further comprising a sealing bolt, wherein the sealing bolt is opposite to the pressing bolt, and the sealing bolt is inserted into the second through hole for sealing the second through hole.
6. A sequence valve, characterized in that, includes the buffer device of any one of claims 1-5, and further includes a valve body, a hydraulic oil flow channel is arranged in the valve body, and the buffer device is located in the flow channel, wherein, the two ends of the flow channel are respectively a liquid inlet and a liquid outlet, and the buffer sheet in the buffer device is close to the liquid inlet, and the buffer valve core in the buffer device is close to the liquid outlet.
7. The sequence valve according to claim 6, further comprising a sequence valve insert having an inlet port and an outlet port, the inlet port communicating with the inlet and the outlet port communicating with the buffer valve insert.
8. The sequence valve of claim 7, wherein the inlet port is coaxial with the outlet port, and an axis of the sequence valve insert is parallel with an axis of the outlet port.
9. The sequence valve of claim 7, further comprising a one-way valve disposed within the valve body and in parallel with the sequence valve insert.
10. The sequence valve according to claim 6, further comprising two process plugs, wherein two process holes are formed in the side wall of the valve body, and the process plugs are connected with the process holes through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120120764.XU CN214247840U (en) | 2021-01-15 | 2021-01-15 | Buffer device and sequence valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120120764.XU CN214247840U (en) | 2021-01-15 | 2021-01-15 | Buffer device and sequence valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214247840U true CN214247840U (en) | 2021-09-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120120764.XU Active CN214247840U (en) | 2021-01-15 | 2021-01-15 | Buffer device and sequence valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214247840U (en) |
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2021
- 2021-01-15 CN CN202120120764.XU patent/CN214247840U/en active Active
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