CN212774997U - High-pressure large-flow plug-in mounting type overflow valve - Google Patents
High-pressure large-flow plug-in mounting type overflow valve Download PDFInfo
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- CN212774997U CN212774997U CN202021336308.0U CN202021336308U CN212774997U CN 212774997 U CN212774997 U CN 212774997U CN 202021336308 U CN202021336308 U CN 202021336308U CN 212774997 U CN212774997 U CN 212774997U
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Abstract
The utility model discloses a large-traffic cartridge formula overflow valve of high pressure, including the cartridge overflow valve, cartridge overflow valve spring be equipped with the external control overflow valve through the pipe connection, the external control overflow valve include the external control overflow valve case, wrap up the external control overflow valve body of external control overflow valve case, the external control overflow valve body be equipped with the external control hole with one side in proper order, the external control overflow valve be equipped with the servo cylinder body through the connecting hole connection, the servo cylinder body is equipped with switching-over groove and piston groove, and inside is equipped with switching-over valve case and servo piston respectively, the switching-over groove be equipped with high-pressure variable pump through the pipe connection. The utility model discloses a large-traffic cartridge formula overflow valve of high pressure is through installing the outer overflow valve body of controlling additional to through the adjustment of servo cylinder body, thereby form an oil pressure that acts on the loading force on the case, improved the maximum load pressure of overflow valve, realized the pressure regulation that the superhigh pressure went through, and the pressure regulating stable performance.
Description
Technical Field
The utility model relates to a forging press hydraulic element, especially a large-traffic cartridge formula overflow valve of high pressure.
Background
The overflow valve is a hydraulic element which plays roles of safety protection and constant pressure in the production of mechanical die forgings; the high-pressure overflow valve mainly comprises a direct-acting overflow valve, a pilot-operated overflow valve, a proportional overflow valve, a plug-in type overflow valve and the like, and at present, the plug-in type overflow valve is mainly used for the overflow valve used for high pressure in the market; the forging press has the disadvantages that when the forging press is in a high-pressure or ultrahigh-pressure state, the pressure requirement of the common plug-in overflow valve cannot be met; the used spring has hard rigidity, which causes the phenomena of inconvenient pressure regulation and large pressure fluctuation. For example, the patent literature of China discloses a spring type pressure reducing overflow valve with the publication number CN 206429713U. The air bag type air-conditioning valve comprises a screw rod, wherein a cylinder with an internal thread is arranged at the top of the screw rod, an air flow valve seat is arranged at the bottom of an air flow baffle, an air flow hole is formed in the right side of the air flow valve seat, an overflow valve seat is arranged at the lower part of the water flow hole, an air bag sealing device arranged at the bottom of the screw rod is arranged in the cylinder valve core, an overflow through hole is formed in the lower part of the air bag sealing device, a first pressure regulating spring with one end fixed at the lower part of a valve; however, the pressure regulating device has the disadvantages that the adjustment of the spring is realized by utilizing the rolling screw nut pair, the adjustment of the pressure of the ultrahigh pressure system cannot be realized, and the pressure regulating performance is unstable.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the pressure requirement that the general overflow valve of prior art problem can't satisfy high pressure or superhigh pressure, spring rate is harder, leads to the inconvenient and big problem of pressure oscillation of pressure regulating, provides a reduce cartridge valve spring chamber pressure, satisfies the cartridge formula overflow valve of the pressure requirement of superhigh pressure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-pressure large-flow cartridge overflow valve comprises a cartridge valve body, a cartridge valve booster spool and a cartridge valve spring, wherein the cartridge valve body is used for inserting the overflow valve, the cartridge valve booster spool and the cartridge valve spring are connected through a pipeline, the cartridge overflow valve is provided with an external control overflow valve on one side of the cartridge valve spring, the external control overflow valve comprises an I-shaped external control overflow valve spool and an external control overflow valve body wrapping the external control overflow valve spool, an external control hole, an oil inlet hole and an oil outlet hole are sequentially arranged on the same side of the external control overflow valve body, and the oil inlet hole is connected with the cartridge overflow valve through; the valve body of the external control overflow valve is provided with a connecting hole at the end part of one side of the oil outlet hole, the valve body of the external control overflow valve is connected with a servo cylinder body through the connecting hole, the servo cylinder body is internally provided with a servo cylinder piston part in the valve body of the external control overflow valve, and an external control overflow valve spring is arranged between the servo cylinder piston part and a valve core of the external control overflow valve; the servo cylinder body is provided with a reversing groove and a piston groove, a valve core of a reversing valve in a shape like a Chinese character 'wang' is arranged in the reversing groove, a left side hole of the reversing valve, a middle hole of the reversing valve and a right side hole of the reversing valve are sequentially arranged on one side of the reversing groove, an oil outlet hole is connected with the left side hole of the reversing valve and the right side hole of the reversing valve through pipelines, a left piston connecting hole and a right piston connecting hole are arranged on the other side of the reversing groove, a servo piston is arranged in the piston groove, a left piston hole and a right piston hole are arranged on one side of the left piston connecting hole in the piston groove, the left piston hole is connected with the right piston connecting hole through a pipeline, and the right piston hole is connected with the; the high-pressure variable pump is connected with the external control oil tank through a pipeline, and the external control oil tank is connected with the external control hole through a pipeline; when the load oil pressure is too large and the cartridge valve cannot be effectively adjusted, the valve core of the reversing valve can be moved to move towards the externally controlled overflow valve according to the numerical value of the high-pressure variable pump, oil can flow into the piston groove on one side through the pipeline and the piston hole, and the oil on the other side flows back to the oil tank through the reversing valve through the other piston hole, so that the servo cylinder body is pushed to move towards one side of the valve body of the externally controlled overflow valve; through the compression of external control overflow valve spring, finally open the switch in external control hole, fluid enters into external control overflow valve body after, the inside certain oil pressure that produces of external control overflow valve body, and act on cartridge valve pressure boost case through the pipeline, be used for the pressure of balanced load, through holistic structure, make the overflow valve not only keep the oil pressure balance through the pressure of spring, improved the upper limit that can carry out the oil pressure balance, the overflow valve requirement when satisfying the superhigh pressure, and it is more convenient to adjust.
Preferably, the cartridge valve booster valve core is T-shaped, and the area of one end connected with the cartridge valve spring is 1.5 to 2.5 times of the area of the lower end; the area of the upper end of the valve core of the cartridge valve is set to be larger than the area of the lower end of the valve core, so that the pressure ratio of the two ends is the inverse ratio of the two areas when the valve core is balanced, the aim of controlling the larger pressure by the smaller pressure is fulfilled, and the function of pressurizing is achieved.
Preferably, the middle hole of the reversing valve is connected with a direct-acting overflow valve through a pipeline, the load end of the direct-acting overflow valve is connected with an internal oil tank, and the high-pressure variable pump and the direct-acting overflow valve are both connected with a pressure gauge; the in-process that the switching-over valve case removed, the oil pressure removes in controlling means's in-process, can appear because the speed is very fast leads to the oil pressure too big, installs direct action type overflow valve additional on the pipeline of fluid backward flow and controls the oil pressure to through linking to each other with the manometer, real time monitoring pressure guarantees that the system is not destroyed because the oil pressure is too big.
Preferably, the internal oil tank connected with the valve body of the cartridge valve, the oil outlet hole and the direct-acting overflow valve is the same oil tank, and the oil tank connected with the high-pressure variable pump is an external oil tank; the externally controlled overflow valve is connected with the cartridge valve, control oil comes from the outside, the cartridge valve, the externally controlled overflow valve and the direct-acting overflow valve share one oil tank, when the oil tank is overloaded, system pressure exceeds the oil pressure on the upper part of the cartridge valve, the valve core of the overflow valve moves to realize overflow, the externally controlled overflow valve can also move, and the condition that the oil tank cannot work due to different oil pressures cannot occur.
Preferably, a handle groove is formed in one side of a left hole of the reversing groove of the servo cylinder body, a handle is arranged in the handle groove, and the handle is fixedly connected with the reversing valve spool; the valve core of the reversing valve is pulled by the handle, so that the integral structure can manually regulate pressure, and a small displacement is converted into a large hydraulic signal.
Preferably, a cartridge valve damping hole is arranged in the cartridge valve booster valve core, and the cartridge valve damping hole extends from a load end to a spring end; because the internal pressure of one side of the spring of the plug-in overflow valve is lower than the inlet pressure of the plug-in valve, the damping hole of the plug-in valve is arranged on the booster valve core of the plug-in valve, and the stability of the plug-in valve can be effectively kept.
Preferably, an external control overflow valve damping hole is arranged in the external control overflow valve core, the damping hole is T-shaped, and the end, close to the external control hole, of the external control overflow valve core extends to two sides of the I-shaped external control overflow valve core; because the internal pressure on one side of the spring of the external control overflow valve is lower than the pressure on the left side in the compression process, the damping hole of the external control overflow valve is arranged in the valve core of the external control overflow valve, the oil pressure of the compression part can be discharged out of the valve body, and the stability of the external control overflow valve is effectively kept.
Therefore, the utility model discloses following beneficial effect has: (1) the use requirements of a high-pressure or ultrahigh-pressure forging press are met; (2) the pressure regulation is convenient; (3) the pressure fluctuation is small.
Drawings
FIG. 1 is a schematic structural diagram of a high-pressure large-flow cartridge overflow valve;
FIG. 2 is a schematic structural diagram of the middle plug-in type overflow valve of the present invention;
FIG. 3 is a schematic structural view of the middle and external control overflow valve of the present invention;
fig. 4 is a schematic structural diagram of the servo cylinder of the present invention.
1, inserting an overflow valve; 2, externally controlling an overflow valve; 3, a pipeline; 4, servo cylinder body; 5, a valve core of the reversing valve; 6, a servo piston; 7, a high-pressure variable pump; 8, an internal fuel tank; 9, an external control oil tank; 10, a direct-acting overflow valve; 11, a pressure gauge; 101, a cartridge valve body; 102, a cartridge valve booster valve core; 103, a cartridge valve spring; 104, a damping hole of the cartridge valve; 201, externally controlling a relief valve core; 202, an external control overflow valve body; 203, external control holes; 204, oil inlet holes; 205, oil outlet holes; 206, a connecting hole; 207, an externally controlled relief valve spring; 208, externally controlling a damping hole of the overflow valve; 401, a servo cylinder piston portion; 402, a commutation slot; 403, a piston groove; 404, a reversing valve left port; 405, a reversing valve middle hole; 406, a reversing valve right port; 407, the piston is connected with the left hole; 408, the piston is connected with the right hole; 409, piston left hole; 410, piston right bore; 411, a handle slot; 412, a handle.
Detailed Description
The following provides a further description of embodiments of the present invention by way of examples and with reference to the accompanying drawings.
Example 1
In the embodiment 1 shown in fig. 1, the high-pressure large-flow cartridge type relief valve comprises a cartridge valve body 101, a cartridge valve booster spool 102 and a cartridge valve spring 103, wherein the cartridge valve booster spool is T-shaped, the area of one end connected with the cartridge valve spring is 2 times of the area of the lower end, the cartridge valve booster spool is internally provided with a cartridge valve damping hole 104, the cartridge valve damping hole extends from a load end to a spring end, the cartridge relief valve is provided with an external control relief valve 2 at one side of the cartridge valve spring through a pipeline, as shown in fig. 3, the external control relief valve comprises an i-shaped external control relief valve spool 201, an external control valve body 202 wrapping the external control relief valve spool, the same side of the external control relief valve body is sequentially provided with an external control hole 203, an oil inlet hole 204 and an oil outlet hole 205, an external control overflow valve damping hole 208 is arranged in the valve core of the external control overflow valve, the damping hole is T-shaped, one end of the valve core of the external control overflow valve, which is close to the external control hole, extends to two sides of the valve core of the I-shaped external control overflow valve, and the oil inlet hole is connected with the plug-in overflow valve through a pipeline 3; the end part of one side of the oil outlet of the external control overflow valve body is provided with a connecting hole 206, the external control overflow valve body is connected with a servo cylinder body 4 through the connecting hole, as shown in fig. 4, the servo cylinder body is internally provided with a servo cylinder piston part 401 in the external control overflow valve body, and an external control overflow valve spring 207 is arranged between the servo cylinder piston part and an external control overflow valve core; the servo cylinder body is provided with a reversing groove 402 and a piston groove 403, the reversing groove is internally provided with a valve core 5 of a reverse valve shaped like a Chinese character 'wang', a handle slot 411 is arranged on one side of the left hole of the reversing slot of the cylinder body of the servo cylinder, a handle 412 is arranged in the handle slot, the handle is fixedly connected with the valve core of the reversing valve, one side of the reversing groove is sequentially provided with a reversing valve left hole 404, a reversing valve middle hole 405 and a reversing valve right hole 406, the oil outlet is connected with the left hole of the reversing valve and the right hole of the reversing valve through pipelines, the other side of the reversing groove is provided with a piston connecting left hole 407 and a piston connecting right hole 408, a servo piston 6 is arranged in the piston groove, a piston left hole 409 and a piston right hole 410 are arranged on one side of the piston connecting left hole of the piston groove, the left piston hole is connected with the right piston connecting hole through a pipeline, and the right piston hole is connected with the left piston connecting hole through a pipeline; the high-pressure variable pump type oil tank reversing valve is characterized in that a high-pressure variable pump 7 is arranged in a middle hole of the reversing valve through pipeline connection, the oil outlet and the high-pressure variable pump are connected with an internal oil tank 8 through pipelines, the high-pressure variable pump is connected with an external control oil tank 9 through pipelines, the external control oil tank is connected with an external control hole through pipelines, a direct-acting overflow valve 10 is arranged in the middle hole of the reversing valve through pipeline connection, the load end of the direct-acting overflow valve is connected with the internal oil tank, the high-pressure variable pump and the direct-acting overflow valve are connected with a pressure gauge 11, the internal oil tank connected with a valve body of the cartridge valve, the high-pressure variable pump and the direct-acting overflow valve is the same oil tank, and the oil tank connected with the high.
When the hydraulic control system is used, when the load oil pressure is too high and the cartridge valve cannot be effectively adjusted, the high-pressure variable pump is started, the handle is stirred at one side of the externally-controlled overflow valve to drive the valve core of the reversing valve to move forwards, oil flows into the piston groove at one side through the pipeline and the piston hole, the oil at the other side flows back to the oil tank through the reversing valve through the other piston hole, and the servo cylinder body is pushed to move towards one side of the valve body of the externally-controlled overflow valve because the piston is fixed; the valve core of the externally controlled overflow valve is pushed to move by compressing the spring of the externally controlled overflow valve, and the switch of the external control hole is opened, so that oil enters the valve body of the externally controlled overflow valve, a certain oil pressure is generated in the valve body of the externally controlled overflow valve and acts on the pressurizing valve core of the cartridge valve to balance the pressure of a load, and when the pressure of the load is still greater than the sum of the pressure of the upper spring and the oil pressure, the valve core moves to realize overflow; and when the valve core of the reversing valve moves towards the external control overflow valve, the valve core of the external control overflow valve also moves along with the external control overflow valve under the action of oil pressure, the hole of the reversing valve is reduced until the valve port is closed, so that the valve core of the external control overflow valve stops moving, and when the valve core of the reversing valve returns, oil enters the oil tank from the oil outlet through a pipeline, and finally the return of the whole structure is completed.
Claims (7)
1. A high-pressure large-flow cartridge overflow valve comprises a cartridge valve body (101), a cartridge valve booster spool (102) and a cartridge valve spring (103) of a cartridge overflow valve (1), and is characterized in that the cartridge overflow valve is provided with an external control overflow valve (2) at one side of the cartridge valve spring through a pipeline connection, the external control overflow valve comprises an I-shaped external control overflow valve spool (201) and an external control overflow valve body (202) wrapping the external control overflow valve spool, an external control hole (203), an oil inlet hole (204) and an oil outlet hole (205) are sequentially arranged at the same side of the external control overflow valve body, and the oil inlet hole is connected with the cartridge overflow valve through a pipeline (3); the end part of one side of the oil outlet of the external control overflow valve body is provided with a connecting hole (206), the external control overflow valve body is connected with a servo cylinder body (4) through the connecting hole, the servo cylinder body is internally provided with a servo cylinder piston part (401) in the external control overflow valve body, and an external control overflow valve spring (207) is arranged between the servo cylinder piston part and an external control overflow valve core; the servo cylinder body is provided with a reversing groove (402) and a piston groove (403), a valve core (5) of the reversing valve in a shape like the Chinese character 'wang' is arranged in the reversing groove, a left hole (404) of the reversing valve, a middle hole (405) of the reversing valve and a right hole (406) of the reversing valve are sequentially arranged on one side of the reversing groove, the oil outlet hole is connected with the left hole of the reversing valve and the right hole of the reversing valve through pipelines, a piston connecting left hole (407) and a piston connecting right hole (408) are arranged on the other side of the reversing groove, a servo piston (6) is arranged in the piston groove, a piston left hole (409) and a piston right hole (410) are arranged on one side of the piston connecting left hole, the piston left hole is connected with the piston connecting right hole through a pipeline, and the piston right hole is connected with the piston connecting; reversing valve middle part hole be equipped with high-pressure variable pump (7) through the pipe connection, oil outlet and high-pressure variable pump all pass through the pipe connection with inside oil tank (8), high-pressure variable pump pass through the pipe connection with external control oil tank (9), the external control oil tank pass through the pipe connection with the external control hole.
2. The high-pressure large-flow cartridge overflow valve according to claim 1, wherein the pressurizing valve core of the cartridge valve is T-shaped, and the area of one end connected with the spring of the cartridge valve is 1.5 to 2.5 times of the area of the lower end.
3. The high-pressure large-flow plug-in overflow valve according to claim 1, wherein a direct-acting overflow valve (10) is connected to a middle hole of the reversing valve through a pipeline, a load end of the direct-acting overflow valve is connected to an internal oil tank, and the high-pressure variable pump and the direct-acting overflow valve are both connected to a pressure gauge (11).
4. The high-pressure large-flow cartridge overflow valve according to claim 3, wherein the internal oil tank connected with the cartridge valve body, the oil outlet and the direct-acting overflow valve is the same oil tank, and the oil tank connected with the high-pressure variable pump is an external oil tank.
5. The high-pressure large-flow plug-in type overflow valve according to claim 1, characterized in that a handle groove (411) is formed in the servo cylinder body on one side of a left hole of the reversing groove, a handle (412) is arranged in the handle groove, and the handle is fixedly connected with the reversing valve core.
6. The high-pressure large-flow cartridge overflow valve according to claim 1, wherein a cartridge valve damping hole (104) is formed in the cartridge valve booster spool, and the cartridge valve damping hole extends from a load end to a spring end.
7. The high-pressure large-flow plug-in type overflow valve according to claim 1, wherein an external control overflow valve damping hole (208) is formed in the valve core of the external control overflow valve, the damping hole is T-shaped, and the end, close to the external control hole, of the valve core of the external control overflow valve extends to two sides of the valve core of the I-shaped external control overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021336308.0U CN212774997U (en) | 2020-07-09 | 2020-07-09 | High-pressure large-flow plug-in mounting type overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021336308.0U CN212774997U (en) | 2020-07-09 | 2020-07-09 | High-pressure large-flow plug-in mounting type overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774997U true CN212774997U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021336308.0U Active CN212774997U (en) | 2020-07-09 | 2020-07-09 | High-pressure large-flow plug-in mounting type overflow valve |
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| Country | Link |
|---|---|
| CN (1) | CN212774997U (en) |
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2020
- 2020-07-09 CN CN202021336308.0U patent/CN212774997U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huzhou Branch of Guangzhou Sound Channel AV Technology Co.,Ltd. Assignor: HUZHOU VOCATIONAL TECHNOLOGY College Contract record no.: X2022330000773 Denomination of utility model: A cartridge relief valve with high pressure and large flow Granted publication date: 20210323 License type: Common License Record date: 20221215 |