High-sealing-performance pressure limiting valve

Abstract

The utility model discloses a pressure-limiting valve with high sealing performance, and relates to the technical field of pressure-limiting valves, the pressure-limiting valve comprises a valve body, a valve pipe is fixedly arranged on one side of the valve body, an access end is fixedly arranged at one end of the valve pipe, a supporting disc is arranged in the valve body in a sliding mode, an insertion column is movably connected to one side of the supporting disc in a penetrating mode, and the insertion column is connected with the valve body in a penetrating mode. One end of the inserting column is fixedly connected with an abutting column, one end of the abutting column is in movable contact with the connecting-in end, a spring is fixedly connected between the abutting column and the supporting disc, the inserting column is sleeved with the spring, and a plurality of pressure relief grooves are formed in the outer surface of the valve pipe. The sealing seat is matched with the annular groove, the sealing column is matched with the column groove, and the sealing gasket is matched with the gasket groove, so that a multi-sealing structure is formed, the sealing performance of the pressure-limiting valve is greatly improved, fluid leakage is effectively prevented, stable system pressure is ensured, and the pressure-limiting valve is suitable for working environments with high sealing performance requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure -limiting valve technical field, concretely is a kind of high sealing pressure -limiting valve. BACKGROUND

[0002] Pressure-limiting valve is mainly based on the principle of force balance, usually by valve seat, valve core, spring and other main components are composed, when system pressure is lower than set value, spring force makes valve core tightly press on valve seat, valve is closed, prevents fluid to pass through, when system pressure rises to set value, fluid pressure produces the force of valve core, exceeds spring force, valve core is pushed away, fluid passes through valve and flows out, thereby reduce system pressure, maintain system pressure in set range.

[0003] But prior art still has the following problems:

[0004] The sealing effect of the pressure-limiting valve of prior art needs to be improved, and a single sealing structure is usually used, such as only relying on a simple rubber sealing ring or a plane seal. In the long-term use process, the sealing ring is easy to age and wear, and the plane seal is easy to have a small gap due to system vibration, pressure fluctuation and other factors, resulting in sealing failure and fluid leakage. It cannot meet the working environment with high sealing requirement, and it is difficult to maintain stable system pressure. In the high-pressure hydraulic system, the sealing effect of the single sealing ring will decrease with the change of pressure, increasing the risk of leakage.

[0005] To solve the above problems, the inventor proposes a high sealing pressure-limiting valve to solve the above problems. CONTENT OF UTILITY MODEL

[0006] To solve the problem that the sealing performance of the pressure-limiting valve needs to be improved, the utility model aims to provide a high sealing pressure-limiting valve.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme: a high sealing pressure-limiting valve, comprising a valve body, a valve pipe is fixedly arranged on one side of the valve body, an access end is fixedly arranged at one end of the valve pipe, a support disc is slidably arranged in the valve body, a plug column is movably connected to one side of the support disc, a resisting column is fixedly connected to one end of the plug column, and the resisting column is movably connected to the access end, a spring is fixedly connected between the resisting column and the support disc, and the spring is sleeved on the plug column, and a plurality of pressure relief grooves are formed in the outer surface of the valve pipe.

[0008] Preferably, a column groove is formed in the side of the access end close to the valve pipe, a sealing column is fixedly arranged at one end of the resisting column, and the sealing column is clamped in the column groove, an annular groove is formed in one side of the access end, a sealing seat is fixedly arranged on one side of the resisting column, and the sealing seat is clamped in the annular groove, a pad groove is formed in the column groove, and a sealing pad is fixedly arranged at the end of the sealing column, and the sealing pad is clamped in the pad groove.

[0009] Compared with the prior art, the utility model has the advantages of

[0010] The utility model discloses through the cooperation of sealing seat and annular groove, sealing column and column groove, sealing pad and pad groove, formed multiple sealing structure, greatly improved the sealing performance of pressure limiting valve, effectively prevent fluid leakage, ensure system pressure stability, be applicable to the working environment of higher sealing property requirement. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be to the embodiment or prior art description needed to use the drawing briefly introduce, obviously, the following description in the drawing only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0012] Fig. 1 It is the whole structure schematic diagram of the utility model.

[0013] Fig. 2 It is the valve body, valve pipe and cover disc section and internal structure explosion drawing of the utility model.

[0014] Fig. 3 It is the access end section and the explosion drawing of the utility model and the cooperation structure of the abutment column.

[0015] In the drawing: 1, valve body;11, support disc;12, insert column;13, abutment column;14, spring;15, cover disc;16, pull plate;17, positioning column;2, valve pipe;21, pressure relief groove;3, access end;31, sealing column;32, column groove;33, sealing pad;34, pad groove;35, annular groove;36, sealing seat. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the utility model will be clearly and completely described below, obviously, the described embodiment only is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled person in the art without making creative labor belong to the scope of the utility model protection.

[0017] Embodiment: as Figs. 1-3The utility model provides a kind of high sealing pressure limiting valve, including valve body 1, the side of valve body 1 is fixed with valve pipe 2, one end of valve pipe 2 is fixed with access end 3, slidingly equipped with support disc 11 in valve body 1, the side of support disc 11 is movably penetrated and is connected with plug post 12, one end of plug post 12 is fixedly connected with stop post 13, and one end of stop post 13 is movably contacted with access end 3, spring 14 is fixedly connected between stop post 13 and support disc 11, and spring 14 is set in plug post 12 outside, the outer surface of valve pipe 2 is equipped with several pressure relief grooves 21, when fluid enters valve pipe 2 from access end 3, with system pressure gradually increasing, the pressure that fluid generates to stop post 13 gradually increases, when pressure exceeds the elasticity of spring 14, stop post 13 overcomes the resistance of spring 14, drives plug post 12 and support disc 11 to slide in valve body 1, at this time, stop post 13 is separated from access end 3, fluid enters valve body 1 by the gap between the two, then is discharged by pressure relief groove 21 of valve pipe 2 outer surface, realizes pressure relief, to reduce system pressure, when system pressure reduces to certain degree, the elasticity of spring 14 is greater than fluid pressure, spring 14 resets support disc 11, makes stop post 13 recombine with access end 3 and tightly adhere, form seal again, pressure limiting valve is closed, prevents fluid from continuing to flow out, maintains system pressure in safe range, the collaborative work of spring 14 and stop post 13 etc. component can be opened and closed action according to set pressure value accurately, timely release excessively high pressure, protect other equipment in system from high pressure damage, improve the security and stability of system operation.

[0018] Valve body 1 is connected with valve pipe 2, the outer surface of support disc 11 is movably attached with valve body 1, one end of plug post 12 penetrates support disc 11 and is fixedly connected with pull plate 16, cover disc 15 is fixedly arranged in valve body 1, the outer side of support disc 11 is movably contacted with cover disc 15, positioning column 17 is fixedly arranged on the outer surface of support disc 11, and positioning column 17 penetrates cover disc 15, positioning column 17 penetrates cover disc 15, can limit the sliding direction of support disc 11, ensure that stop post 13 is accurately docked with access end 3, maintain sealing effect;Pull plate 16 facilitates manual operation to plug post 12, is convenient for debugging and overhauling, the cooperation of support disc 11 and cover disc 15 and the setting of positioning column 17 make support disc 11 keep stable during sliding, avoid deviation or jam phenomenon, ensure the reliability and durability of pressure limiting valve work, meanwhile, the design of pull plate 16 facilitates manual operation, facilitates the debugging, maintenance and overhauling of equipment.

[0019] The access end 3 is provided with an annular groove 35 on one side, the abutting column 13 is fixedly provided with a sealing seat 36 on one side, and the sealing seat 36 is clamped in the annular groove 35. The access end 3 is provided with a column groove 32 on one side close to the valve pipe 2, the abutting column 13 is fixedly provided with a sealing column 31 on one end, and the sealing column 31 is clamped in the column groove 32. The column groove 32 is provided with a pad groove 34, and the end of the sealing column 31 is fixedly provided with a sealing pad 33, which is clamped in the pad groove 34. In the initial state, the spring 14 is in a compressed state, the supporting disc 11 is pushed, the plug column 12 drives the abutting column 13 to tightly adhere to the access end 3, the sealing seat 36 on the abutting column 13 is clamped into the annular groove 35 of the access end 3, the sealing column 31 is clamped into the column groove 32, and the sealing pad 33 is clamped into the pad groove 34. The multiple sealing structures ensure the sealing property of the pressure limiting valve in the closed state, and prevent fluid leakage.

[0020] The sealing seat 36 is made of stainless steel, which has excellent corrosion resistance and can resist the corrosion of various fluid media, such as liquids and gases containing acid and alkali components or other corrosive substances. Even if the pressure limiting valve contacts fluid with corrosion during operation, the stainless steel sealing seat 36 is not easy to be corroded, thereby ensuring the integrity of the sealing structure, avoiding sealing failure caused by corrosion, and ensuring long-term stable operation of the pressure limiting valve in a complex medium environment.

[0021] The pressure limiting valve has simple structure, easy manufacturing and installation, and can adapt to systems with different pressure ranges and fluid media through reasonable structural design, and has wide application prospect.

[0022] Working principle: in the initial state, the spring 14 is in a compressed state, the supporting disc 11 is pushed, the plug column 12 drives the abutting column 13 to tightly adhere to the access end 3, the sealing seat 36 on the abutting column 13 is clamped into the annular groove 35 of the access end 3, the sealing column 31 is clamped into the column groove 32, and the sealing pad 33 is clamped into the pad groove 34. The multiple sealing structures ensure the sealing property of the pressure limiting valve in the closed state, and prevent fluid leakage.

[0023] When the fluid enters the valve pipe 2 from the access end 3, the pressure of the fluid on the abutting column 13 gradually increases as the system pressure gradually rises. When the pressure exceeds the elastic force of the spring 14, the abutting column 13 overcomes the resistance of the spring 14, drives the plug column 12 and the supporting disc 11 to slide in the valve body 1. At this time, the abutting column 13 is separated from the access end 3, the fluid enters the valve body 1 through the gap between the two, and then is discharged through the pressure relief groove 21 on the outer surface of the valve pipe 2, so as to realize pressure relief and reduce the system pressure.

[0024] When the system pressure is reduced to a certain extent, the elastic force of the spring 14 is greater than the fluid pressure, the spring 14 pushes the supporting disc 11 to reset, so that the abutting column 13 is tightly attached to the access end 3 again, the sealing is formed again, the pressure limiting valve is closed, the fluid is prevented from continuing to flow out, the system pressure is maintained within a safe range, the positioning column 17 penetrates through the cover disc 15, the sliding direction of the supporting disc 11 can be limited, the abutting column 13 and the access end 3 are accurately connected, and the sealing effect is maintained; the pull plate 16 facilitates manual operation on the inserting column 12, and facilitates debugging and maintenance.

[0025] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A high-sealing pressure relief valve, comprising a valve body (1), characterized in that: A valve tube (2) is fixedly provided on one side of the valve body (1), and an access end (3) is fixedly provided at one end of the valve tube (2). A support plate (11) is slidably provided inside the valve body (1). A plug (12) is movably connected through one side of the support plate (11). A stop (13) is fixedly connected at one end of the plug (12), and one end of the stop (13) is in movable contact with the access end (3). A spring (14) is fixedly connected between the stop (13) and the support plate (11). Several pressure relief grooves (21) are opened on the outer surface of the valve tube (2). A column groove (32) is opened on the side of the access end (3) near the valve tube (2). A sealing column (31) is fixedly provided at one end of the stop (13), and the sealing column (31) is stuck in the column groove (32).

2. The high-sealing pressure relief valve as described in claim 1, characterized in that: An annular groove (35) is provided on one side of the access terminal (3), and a sealing seat (36) is fixedly provided on one side of the abutment (13), and the sealing seat (36) is engaged in the annular groove (35).

3. The high-sealing pressure relief valve as described in claim 1, characterized in that: The valve body (1) is connected to the valve pipe (2), and the outer surface of the support plate (11) is in contact with the valve body (1).

4. The high-sealing pressure relief valve as described in claim 1, characterized in that: One end of the insert (12) passes through the support plate (11) and is fixedly connected to the pull plate (16).

5. A high-sealing pressure relief valve as described in claim 1, characterized in that: The valve body (1) is fixedly provided with a cover plate (15), and the outer side of the support plate (11) is in contact with the cover plate (15).

6. A high-sealing pressure relief valve as described in claim 1, characterized in that: The outer surface of the support plate (11) is fixedly provided with a positioning post (17), and the positioning post (17) penetrates the cover plate (15).

7. A high-sealing pressure relief valve as described in claim 1, characterized in that: The spring (14) is sleeved on the outside of the insert (12).

8. A high-sealing pressure relief valve as described in claim 1, characterized in that: A gasket groove (34) is provided in the column groove (32), and a sealing gasket (33) is fixedly provided at the end of the sealing column (31), and the sealing gasket (33) is stuck in the gasket groove (34).

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