CN210153012U - Ultrahigh pressure unloading valve - Google Patents
Ultrahigh pressure unloading valve Download PDFInfo
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- CN210153012U CN210153012U CN201920297884.XU CN201920297884U CN210153012U CN 210153012 U CN210153012 U CN 210153012U CN 201920297884 U CN201920297884 U CN 201920297884U CN 210153012 U CN210153012 U CN 210153012U
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Abstract
The utility model discloses an ultrahigh pressure unloading valve, which relates to a valve unloading device, comprising a main valve body, wherein a plurality of pressure reducing valves which are sequentially communicated and can reduce pressure step by step are arranged in the main valve body, the pressure reducing valves are communicated with each other through a pressure reducing cavity and a pipeline, a plurality of check valves used for balancing the pressure of the front pipeline of the corresponding pressure reducing valve are arranged on the main valve body, the check valves are communicated with the cavity through connecting channels, the connecting pipeline is communicated with a control oil port at the upper end of the check valve, the pressure reducing valves are connected in series, so that the ultrahigh pressure liquid in the unloading valve can be reduced in stages, the flow rate of the liquid at the pipe orifice of the unloading valve is reduced, the pressure difference at the two ends of the unloading port of the unloading valve is reduced, the pressure of the ultrahigh pressure liquid after passing through the unloading valve is reduced to a certain range, the problems of erosion and vaporization generated when the prior art directly unlo, the pressure reducing valve can work normally.
Description
Technical Field
The invention belongs to a valve unloading device, and particularly relates to an ultrahigh pressure unloading valve.
Background
At present, in a hydraulic system with large flow and working pressure of 150 MPa-400 MPa, the existing unloading scheme is generally direct unloading, namely, an ultrahigh-pressure liquid medium is directly discharged through a hydraulic control one-way valve, and at the moment, because the pressure of the ultrahigh-pressure liquid medium of 150 MPa-400 MPa is suddenly reduced to 0MPa, when the liquid medium passes through a valve hole, the flow speed is suddenly accelerated due to too large pressure drop, the acting force of the liquid medium on the unloading hole is very large and far exceeds the bearing limit of the existing material, so that the unloading has the problem that the unloading hole is easily eroded and damaged, and the service life is shortened; meanwhile, the pressure drop is too large, the fluid medium can generate a vaporization phenomenon due to very large energy release, and bubbles in the fluid medium are more due to the vaporization phenomenon and enter ultrahigh pressure circulation to become countless bubble bombs, so that a hydraulic system generates cavitation, and the damage of a hydraulic element is accelerated; this not only affects the normal use of the hydraulic system, but also increases the maintenance costs of the hydraulic system.
Therefore, a new technique is particularly needed to solve the problems of erosion and vaporization when the existing ultrahigh pressure hydraulic system is directly unloaded.
Disclosure of Invention
The invention provides an ultrahigh pressure unloading valve, which aims to solve the problems of erosion and vaporization when the existing ultrahigh pressure hydraulic system is directly unloaded.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an ultrahigh pressure unloading valve, includes the main valve body, the main valve body in be equipped with a plurality of decompression valves that can decompress step by step that communicate in proper order, the decompression valve between through cavity and the pipeline intercommunication that can decompress, the main valve body on be equipped with a plurality of check valves that are used for balancing the preceding line pressure of corresponding decompression valve, check valve and cavity pass through the interface channel intercommunication, the control hydraulic fluid port intercommunication of interface channel and check valve upper end.
The pressure reducing valve comprises a P1 cavity pressure reducing valve, a P2 cavity pressure reducing valve, a P3 cavity pressure reducing valve and a P4 cavity pressure reducing valve, wherein the P1 cavity pressure reducing valve is communicated with a pressure reducing valve spool of the P2 cavity pressure reducing valve through a cavity and a pipeline at the position of a channel, the P2 cavity pressure reducing valve is communicated with the pressure reducing valve spool of the P3 cavity pressure reducing valve through the cavity and the pipeline at the position of the channel, and the P3 cavity pressure reducing valve is communicated with the pressure reducing valve spool of the P4 cavity pressure reducing valve through the cavity and the pipeline at the position of the channel.
The cavity be the space of ring form cross-section, the cavity include P1 chamber, P2 chamber, P3 chamber and P4 chamber, the P1 chamber be located P1 chamber relief pressure valve outside, the P2 chamber be located P2 chamber relief pressure valve outside, the P3 chamber be located P3 chamber relief pressure valve outside, the P4 chamber be located P4 chamber relief pressure valve outside.
The structure of the pressure reducing valve comprises a valve body, a spring A and a pressure reducing valve core capable of moving in the valve body, wherein the valve body is connected with one end of the spring A in a cavity, the other end of the spring A is connected with the pressure reducing valve core, a channel for communicating the internal cavity space of the pressure reducing valve with the external cavity of the pressure reducing valve is arranged in the valve body, and the channel comprises 4 channels A which are uniformly distributed on the valve body and 2 symmetrically distributed channels B.
The check valve comprises a P1 hydraulic control check valve, a P2 hydraulic control check valve, a P3 hydraulic control check valve and a P4 hydraulic control check valve, wherein the P1 hydraulic control check valve is communicated with a P1 cavity through a connecting channel, the P2 hydraulic control check valve is communicated with a P2 cavity through a connecting channel, the P3 hydraulic control check valve is communicated with a P3 cavity through a connecting channel, the P4 hydraulic control check valve is communicated with a P4 cavity through a connecting channel, a high-pressure oil inlet is arranged in the main valve body, a P0 channel is arranged on a pipeline between the high-pressure oil inlet and a P1 cavity pressure reducing valve, the P0 channel is communicated with the P0 hydraulic control check valve, and the structure of the P0 hydraulic control check valve is the same as that of the P1 hydraulic control check valve.
The structure of the check valve comprises a check valve body, a spring B, a movable check valve core and a piston rod capable of pushing the check valve core, wherein the check valve body is connected with one end of the spring B, the other end of the spring B is connected with the check valve core, the piston rod is positioned above the check valve core, a pipeline for liquid inlet is arranged at the lower end of the check valve, the pipeline is communicated with a connecting channel, and an oil outlet for liquid drainage is arranged in the check valve.
The pressure reducing valve is installed on the main valve body through a screw.
The invention has the beneficial effects that: the pressure reducing valves are connected in series, so that the ultrahigh pressure liquid in the unloading valve can be subjected to graded pressure reduction, the flow rate of the liquid at the pipe orifice of the unloading valve is reduced, the pressure difference at two ends of the unloading port of the unloading valve is reduced, the pressure of the ultrahigh pressure liquid after passing through the unloading valve is reduced to a certain range, the problems of erosion and vaporization generated in the prior art when the ultrahigh pressure liquid is directly unloaded are solved, and in addition, the pressure difference of the liquid in front of the pressure reducing valves is maintained through the one-way valves as far as possible, so that the.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
fig. 4 is a schematic diagram of the present invention.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Preferably, the ultrahigh pressure unloading valve comprises a main valve body 27, a plurality of pressure reducing valves which are sequentially communicated and can reduce pressure step by step are arranged in the main valve body 27, the number of the pressure reducing valves is 4 in the preferred embodiment, the pressure reducing valves comprise a P1 cavity pressure reducing valve 1, a P2 cavity pressure reducing valve 16, a P3 cavity pressure reducing valve 18 and a P4 cavity pressure reducing valve 20, corresponding chambers are arranged outside the pressure reducing valve, the chambers comprise a P1 chamber 11, a P2 chamber 15, a P3 chamber 17 and a P4 chamber 19, the pressure reducing valves are connected in series through a pressure-reducing chamber and a pipeline, the P1 cavity pressure reducing valve 1 is communicated with the pressure reducing valve spool 9 of the P2 cavity pressure reducing valve 16 through the chamber and the pipeline at the position of a channel, the P2 cavity pressure reducing valve 16 is communicated with the pressure reducing valve spool 9 of the P3 cavity pressure reducing valve 18 through the chamber and the pipeline at the position of the channel, and the P3 cavity pressure reducing valve 18 is communicated with the pressure reducing valve spool 9 of the P4 cavity pressure reducing valve 20 through the chamber and the pipeline at the position of the channel.
The structure of the pressure reducing valve comprises a valve body 14, a spring A13 and a pressure reducing valve spool 9 capable of moving inside the valve body 14, wherein the valve body 14 is connected with one end of a spring A13 in a cavity, the other end of the spring A13 is connected with the pressure reducing valve spool 9, a channel for communicating the internal cavity space of the pressure reducing valve and the external cavity of the pressure reducing valve is arranged in the valve body (14), and the channel comprises 4 channels A10 which are uniformly distributed on the valve body 14 and 2 symmetrically distributed channels B12.
The main valve body 27 is provided with a plurality of check valves for balancing the pressure of a pipeline in front of the corresponding pressure reducing valve, in the preferred embodiment, the number of the check valves is four, the check valves are communicated with the chambers through a connecting channel 21, the check valves comprise a P1 hydraulic control check valve 3, a P2 hydraulic control check valve 4, a P3 hydraulic control check valve 5 and a P4 hydraulic control check valve 6, the P1 hydraulic control check valve 3 is communicated with a P1 cavity 11 through the connecting channel 21, the P2 hydraulic control check valve 4 is communicated with a P2 cavity 15 through the connecting channel 21, the P3 hydraulic control check valve 5 is communicated with a P3 cavity 17 through the connecting channel 21, the P4 hydraulic control check valve 6 is communicated with a P4 cavity 19 through the connecting channel 21, a high-pressure oil inlet 8 is arranged in the main valve body 27, a P0 channel 7 is arranged on the pipeline between the high-pressure oil inlet 8 and a P1 cavity pressure reducing valve 1, and the P0 channel 7 is communicated with a P0 check valve 2, the structure of the P0 hydraulic control one-way valve 2 is the same as that of the P1 hydraulic control one-way valve 3, and the connecting channel 21 is communicated with a control oil port 24 at the upper end of the one-way valve.
The structure of the check valve comprises a check valve body 28, a spring B22, a movable check valve core 26 and a piston rod 23 capable of pushing the check valve core 26, wherein the check valve body 28 is connected with one end of a spring B22, the other end of a spring B22 is connected with the check valve core 26, the piston rod 23 is positioned above the check valve core 26, a pipeline for liquid inlet is arranged at the lower end of the check valve, the pipeline is communicated with a connecting channel 21, and an oil outlet 25 for liquid drainage is arranged in the check valve.
The pressure reducing valve is mounted on the main valve body 27 by screws.
The working principle is as follows: before use, the decompression range of each pressure reducing valve and the pressure of the control oil port of each check valve are designed to be a fixed value, and the fixed value is correspondingly decreased progressively, so that the unloading valve has the function of staged decompression, then high-pressure liquid enters the unloading valve from a high-pressure oil inlet 8, firstly, a P0 pilot-operated check valve 2 is arranged in a pipeline in front of a P1 cavity pressure reducing valve 1, the P0 pilot-operated check valve 2 plays a role in balancing hydraulic pressure on the pipeline in front of the P1 cavity pressure reducing valve 1 and a P0 channel, if the hydraulic pressure at the two positions is higher than the pressure value set by the control oil port 24, the liquid at the control oil port 24 pushes a piston rod 23 through the pressure, then the piston rod 24 moves downwards to push a check valve core 26, so that the check valve core 26 does not block the inner cavity channel of the check valve, at the moment, the liquid in a connecting channel 21 enters the inner cavity of the check, then the liquid is discharged from the oil outlet 25 to an oil tank or other pipelines, so that the liquid in the P0 channel 7 and the pipeline in front of the P1 cavity pressure reducing valve 1 is reduced in pressure, and the normal work of the P1 cavity pressure reducing valve 1 is ensured, and other check valves, such as the P1 hydraulic control check valve 3, the P2 hydraulic control check valve 4, the P3 hydraulic control check valve 5 and the P4 hydraulic control check valve 6, have the same working principle and function as the P0 hydraulic control check valve 2, and can reduce the pressure of the pipeline in front of the corresponding pressure reducing valve, and the normal work of the pressure reducing valve is ensured.
Then, the high-pressure liquid in the high-pressure oil inlet 8 pushes the valve core 9 of the pressure reducing valve through pressure, corresponding pressure reduction is performed when the liquid pushes the valve core 9 of the pressure reducing valve, then the high pressure enters the P1 cavity 11 through the channel a10 of the valve body 14, then the liquid enters the cavity of the P1 pilot-controlled check valve 3, the high-pressure liquid entering from the high-pressure oil inlet 8 is subjected to primary pressure reduction through the process, the pressure reduction range is the set value of the pressure reducing valve 1 of the P1 cavity, the liquid in the cavity also flows into the connecting channel 21 and the pipeline in front of the pressure reducing valve 16 of the P2 cavity, if the liquid pressure of the connecting channel 21 at the pressure reducing valve 1 of the P1 cavity is greater than the pressure of the control oil port 24 of the P1 pilot-controlled pressure reducing valve 3, the P1 pilot-controlled check valve 3 performs corresponding pressure reduction, the working process and the principle are like the, the normal operation of the P2 chamber pressure relief valve 16 is assured and fluid will continue to flow through the lower pressure relief valve where it is correspondingly relieved.
The P1 cavity reducing valve 1 and the P0 hydraulic control one-way valve 2 form the first step of pressure reduction of high-pressure liquid, the P2 cavity reducing valve 16 and the P1 hydraulic control one-way valve 3 form the second step of pressure reduction of high-pressure liquid, the P3 cavity reducing valve 18 and the P2 hydraulic control one-way valve 4 form the third step of pressure reduction of high-pressure liquid, and finally the P4 cavity reducing valve 20 and the P3 hydraulic control one-way valve 5 form the fourth step of pressure reduction of high-pressure liquid, each step of pressure reduction is carried out in a corresponding range, the pressure reduction value is smaller than 50MPa, therefore, when the last step is carried out, the high-pressure liquid with the original pressure of 150 MPa-400 MPa is reduced to be smaller than 50MPa, at the moment, the P4 hydraulic control one-way valve 6 can be opened to discharge the liquid from the inside of the oil outlet 24, when the hydraulic system within 50MPa is directly unloaded, because the pressure of the hydraulic medium is lower, the pressure, at present, a plurality of materials can meet the use requirements, so that the unloading hole is not easy to erode and damage; meanwhile, in the unloading process, the energy release caused by pressure drop is not too large, and the fluid medium is not easy to generate the vaporization phenomenon.
By the arrangement, the problems of erosion and vaporization generated during direct unloading in the prior art can be solved, the service life of the unloading valve is ensured, and the maintenance cost for the valve is reduced.
The above description is only a preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and there may be some slight structural changes in the implementation, and if there are various changes or modifications to the present invention without departing from the spirit and scope of the present invention, and within the claims and equivalent technical scope of the present invention, the present invention is also intended to include those changes and modifications.
Claims (7)
1. An extra-high pressure unloading valve, includes main valve body (27), its characterized in that: the main valve body (27) in be equipped with a plurality of communicating relief pressure valves that can decompress step by step in proper order, the relief pressure valve between through cavity and the pipeline intercommunication that can decompress, the main valve body (27) on be equipped with a plurality of check valves that are used for balancing the preceding line pressure of corresponding relief pressure valve, check valve and cavity pass through interface channel (21) intercommunication, interface channel (21) and the control hydraulic fluid port (24) intercommunication of check valve upper end.
2. The ultra-high pressure unloader valve according to claim 1, wherein: the pressure reducing valve comprises a P1 cavity pressure reducing valve (1), a P2 cavity pressure reducing valve (16), a P3 cavity pressure reducing valve (18) and a P4 cavity pressure reducing valve (20), wherein the P1 cavity pressure reducing valve (1) is communicated with a pressure reducing valve core (9) of the P2 cavity pressure reducing valve (16) through a cavity and a pipeline at the position of a channel, the P2 cavity pressure reducing valve (16) is communicated with the pressure reducing valve core (9) of the P3 cavity pressure reducing valve (18) through the cavity and the pipeline at the position of the channel, and the P3 cavity pressure reducing valve (18) is communicated with the pressure reducing valve core (9) of the P4 cavity pressure reducing valve (20) through the cavity and the pipeline at the position.
3. The ultra-high pressure unloader valve according to claim 1, wherein: the cavity be the space of ring form cross-section, the cavity include P1 chamber (11), P2 chamber (15), P3 chamber (17) and P4 chamber (19), P1 chamber (11) be located P1 chamber relief pressure valve (1) outside, P2 chamber (15) be located P2 chamber relief pressure valve (16) outside, P3 chamber (17) be located P3 chamber relief pressure valve (18) outside, P4 chamber (19) be located P4 chamber relief pressure valve (20) outside.
4. The ultra-high pressure unloader valve according to claim 1, wherein: the structure of relief pressure valve include valve body (14), spring A (13) and can be at valve body (14) inside relief pressure valve case (9) that remove, valve body (14) in the cavity be connected with the one end of spring A (13), the other end and relief pressure valve case (9) of spring A (13) are connected, valve body (14) in be equipped with the passageway that communicates the inside cavity space of relief pressure valve and the outside cavity of relief pressure valve, the passageway include passageway A (10) and 2 symmetric distribution passageways B (12) of 4 evenly distributed on valve body (14).
5. The ultra-high pressure unloader valve according to claim 1, wherein: the check valve comprises a P1 hydraulic control check valve (3), a P2 hydraulic control check valve (4), a P3 hydraulic control check valve (5) and a P4 hydraulic control check valve (6), the P1 hydraulic control one-way valve (3) is communicated with the P1 cavity (11) through a connecting channel (21), the P2 hydraulic control one-way valve (4) is communicated with the P2 cavity (15) through a connecting channel (21), the P3 pilot-controlled check valve (5) is communicated with the P3 cavity (17) through a connecting channel (21), the P4 pilot-controlled check valve (6) is communicated with the P4 cavity (19) through a connecting channel (21), a high-pressure oil inlet (8) is arranged in the main valve body (27), a P0 channel (7) is arranged on a pipeline between the high-pressure oil inlet (8) and the P1 cavity pressure reducing valve (1), the P0 channel (7) is communicated with the P0 pilot-operated check valve (2), the structure of the P0 pilot-controlled check valve (2) is the same as that of the P1 pilot-controlled check valve (3).
6. The ultra-high pressure unloader valve according to claim 1, wherein: the structure of the check valve comprises a check valve body (28), a spring B (22), a movable check valve core (26) and a piston rod (23) capable of pushing the check valve core (26), wherein the check valve body (28) is connected with one end of the spring B (22), the other end of the spring B (22) is connected with the check valve core (26), the piston rod (23) is located above the check valve core (26), a pipeline for liquid inlet is arranged at the lower end of the check valve, the pipeline is communicated with a connecting channel (21), and an oil outlet (25) for liquid drainage is arranged in the check valve.
7. The ultra-high pressure unloader valve according to claim 1, wherein: the pressure reducing valve is installed on the main valve body (27) through a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920297884.XU CN210153012U (en) | 2019-03-08 | 2019-03-08 | Ultrahigh pressure unloading valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920297884.XU CN210153012U (en) | 2019-03-08 | 2019-03-08 | Ultrahigh pressure unloading valve |
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| CN210153012U true CN210153012U (en) | 2020-03-17 |
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| CN201920297884.XU Active CN210153012U (en) | 2019-03-08 | 2019-03-08 | Ultrahigh pressure unloading valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723695A (en) * | 2019-03-08 | 2019-05-07 | 广东南曦液压机械有限公司 | A kind of extra-high pressure unloading valve |
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2019
- 2019-03-08 CN CN201920297884.XU patent/CN210153012U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723695A (en) * | 2019-03-08 | 2019-05-07 | 广东南曦液压机械有限公司 | A kind of extra-high pressure unloading valve |
| CN109723695B (en) * | 2019-03-08 | 2023-10-20 | 广东南曦液压机械有限公司 | Ultrahigh pressure unloading valve |
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