Ultrahigh-pressure hydraulic control pressure release valve

Abstract

The utility model provides an ultrahigh-pressure hydraulic control pressure release valve, and particularly relates to the technical field of pressure release valves, the ultrahigh-pressure hydraulic control pressure release valve comprises an upper valve body and a lower valve body connected with the upper valve body, a hydraulic control piston piece is arranged in the upper valve body and below a hydraulic control connector, and an inner groove for the output end of the hydraulic control piston piece to do telescopic motion is formed in a lower valve seat. The bottom of the lower valve body is provided with a first groove body which is communicated with the inner groove and used for installing the liquid inlet connector, the top of the liquid inlet connector is provided with a third groove body used for installing the retainer, a sealing ball is movably connected to the position, located below the inner side of the conical valve seat, of the retainer, and the inner side, close to the sealing ball, of the conical valve seat is arranged to be a conical surface. When the sealing ball is in contact with the conical surface, the sealing work of the inner groove is realized, and when the sealing ball is separated from the conical surface, the liquid flows into the inner groove through a gap between the sealing ball and the conical surface; and the conical surface and the spherical surface are matched in a sealing manner, so that sealing lines can be overlapped after multiple times of work.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, in particular to an ultra-high pressure hydraulically controlled pressure relief valve. Background Art

[0002] The pressure relief valve is also known as a safety valve. It can automatically open and close according to the working pressure of the system. It is generally installed on the equipment or pipeline of the closed system to provide certain protection for the system safety.

[0003] Existing pressure relief valves are divided into spring-type and lever-type. Existing spring-type pressure relief valves, such as the one disclosed in Patent Publication No. CN221196197U, have an anti-loosening adjustable pressure relief valve structure. However, the pressure relief valve structure described in this patent is relatively simple and cannot be applied to ultra-high-pressure working scenarios, such as hydraulic tensioner tools and ultra-high-pressure test benches in nuclear power installation.

[0004] The pressure relief valves used in hydraulic tensioner tools and ultra-high-pressure test benches for nuclear power installations are ultra-high-pressure hydraulically controlled pressure relief valves. Existing ultra-high-pressure liquid-hole pressure relief valves, such as those disclosed in Patent Publication No. CN202579398U, utilize low-pressure control oil to enter the control cylinder through control port K, pushing the piston and piston push rod to lift the check valve core. The check valve core has a very short stroke when open, accommodating high-speed opening and closing. High-pressure oil then flows out through the oil groove at the upper end of the check valve core and returns to the oil tank through the oil drain port, achieving system pressure relief. When the control oil at port K is removed through the solenoid reversing valve, the piston and piston push rod move upward under the action of the spring. The check valve core then quickly closes and resets under the combined action of the spring and the high-pressure oil released, stopping pressure relief. The pressure relief component used in this patent is the piston itself. While cast iron can withstand high pressures, it has a short service life and may experience incomplete sealing after repeated use.

[0005] Therefore, it is necessary to design an ultra-high pressure hydraulic pressure relief valve with a simple structure and a sealing effect that does not decrease after repeated use. Utility Model Content

[0006] In order to solve the above problems, the present invention proposes an ultra-high pressure hydraulically controlled pressure relief valve to more accurately solve the above problems.

[0007] The utility model is achieved through the following technical solutions:

[0008] The cam is provided with a camming handle which is adapted to move the valve body upwards and downwards to allow the camming handle to pass through the camming handle and to allow the camming handle to pass through the camming handle and to allow the camming handle to pass through the camming handle.

[0009] The utility model further provides that the retaining frame includes a first spring connected to the third groove body, a T-shaped frame body is provided on the first spring, a first circulation groove is provided through the frame body, a second spring for placing the sealing ball is provided in the first circulation groove, and a second circulation groove is provided on the frame body and on both sides of the first circulation groove.

[0010] Furthermore, the hydraulically controlled piston member of the present invention includes a hydraulic seat, a push rod connected to the hydraulic seat, and an ejector pin connected to the push rod.

[0011] Furthermore, the utility model provides a fourth groove body for installation with the hydraulic control joint and the hydraulic control piston member in the upper valve body, a fifth groove body is provided on the inside of the fourth groove body, a third spring is provided on the top of the fifth groove body, and the top of the third spring is connected to the bottom of the push rod.

[0012] Furthermore, the utility model provides a second sealing filler in the fourth tank body, and the second sealing filler is sleeved with the hydraulic seat.

[0013] Furthermore, in the present invention, the conical valve seat is made of alloy material.

[0014] Furthermore, in the present invention, the sealing ball is SI2N3.

[0015] Beneficial effects of the utility model:

[0016] The inner side of the conical valve seat near the sealing ball is provided with a conical surface, and when the sealing ball contacts the conical surface, the inner groove will be closed, and when the sealing ball leaves the conical surface, the liquid will flow into the inner groove through the gap between the sealing ball and the conical surface; the use of conical surface and spherical surface sealing has the advantage of ensuring that the sealing line coincides during multiple operations, so under frequent working conditions, the service life and long-term stability and reliability of the valve body can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the upper valve body and the hydraulic control piston member in the present utility model;

[0019] Figure 3 This is a schematic diagram of the upper valve body structure in the present utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the lower valve body and the liquid inlet joint in the present utility model;

[0021] Figure 5 This is a schematic diagram of the lower valve body structure in the utility model;

[0022] Figure 6 This is a schematic diagram of the retainer structure in the present utility model.

[0023] In the figure, 1. upper valve body; 11. hydraulic control joint; 12. third spring; 13. second sealing packing; 14. fourth tank body; 15. fifth tank body; 2. lower valve body; 21. inner tank; 22. first sealing packing; 23. first tank body; 24. liquid inlet joint; 25. second tank body; 26. retaining frame; 261. first spring; 262. frame body; 263. first flow groove 263; 264. second spring; 265. second flow groove; 27. third tank body; 3. hydraulic control piston member; 31. hydraulic seat; 32. ejector rod; 33. ejector pin; 4. sealing ball; 5. high-pressure outlet; 6. conical valve seat. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example

[0026] refer to Figure 1-6, an ultra-high-pressure hydraulically controlled pressure relief valve, comprising an upper valve body 1 and a lower valve body 2 connected to the upper valve body 1, the top of the upper valve body 1 is connected to a hydraulic control joint 11, a hydraulic control piston 3 is arranged in the upper valve body 1 and below the hydraulic control joint 11, an inner groove 21 is provided in the lower valve body for the output end of the hydraulic control piston 3 to perform telescopic movement, a first sealing packing 22 is provided in the inner groove 21 for sealing the output end of the hydraulic control piston 3, a first groove 23 is provided at the bottom of the lower valve body 2, which is connected to the inner groove 21 and is used to install a liquid inlet joint 24, a second groove 25 is provided above the first groove 23 for installing a conical valve seat 6, a third groove 27 is provided at the top of the liquid inlet joint 24 for installing a retainer 26, a sealing ball 4 is movably connected to the retainer 26 and located on the inner side and below the conical valve seat 6, and a high-pressure outlet 5 is provided on one side of the lower valve body 2, which is connected to the inner groove 21 and located above the conical valve seat 6;

[0027] The arrangement of the sealing ball 4 and the conical valve seat 6 can realize the sealing and opening of the liquid inlet joint;

[0028] Specifically, such as Figure 1 As shown in the figure, the valve body of the present application document is in a non-depressurized state. In this state, external liquid will enter the third groove body 27 through the liquid inlet joint 24 and pass through the retainer 26 to lift the sealing ball 4. The lifted sealing ball 4 will contact the inner side of the conical valve seat 6, thereby sealing the inner groove 21. In this state, the liquid cannot flow through the inner groove 21 to the high-pressure outlet 5. At the same time, when the sealing ball 4 contacts the conical valve seat 6, there will be a certain distance between the output end of the hydraulic control piston 3 and the top of the sealing ball 4.

[0029] When pressure relief is required, high-pressure oil is injected into the upper valve body 1 through the hydraulic control joint 11. The high-pressure oil will contact the hydraulic control piston 3 and apply pressure to the hydraulic control piston 3. When the hydraulic control piston 3 receives the pressure, it will move downward, and the output end of the hydraulic control piston 3 will push the sealing ball 4 downward, creating a certain gap between the sealing ball 4 and the conical valve seat. At this time, the liquid injected into the third tank 27 through the liquid inlet joint 24 will flow into the inner tank 21 through the gap between the sealing ball 4 and the conical valve seat 6, and finally flow through the high-pressure outlet 5, thereby completing the pressure relief work.

[0030] In this embodiment, the first sealing filler 22 can seal the connection between the hydraulic control piston 3 and the upper valve body 1, thereby preventing high-pressure oil from flowing into the hydraulic control piston 3 through the connection between the hydraulic control piston 3 and the upper valve body 1, thereby protecting the hydraulic control piston rod.

[0031] In this embodiment, the second sealing filler 13 can block the flow direction of the liquid flowing into the inner groove 21, thereby preventing the liquid from flowing into the hydraulic control piston 3, thereby ensuring the pressure relief work;

[0032] In this embodiment, the first sealing filler 22 and the second sealing filler 13 are sealing gaskets made of polytetrafluoroethylene material;

[0033] In this embodiment, reference Figure 4 The inner side of the conical valve seat 6 near the sealing ball 4 is provided with a conical surface. When the sealing ball 4 contacts the conical surface, the inner groove 21 is sealed. When the sealing ball 4 is separated from the conical surface, the liquid flows into the inner groove 21 through the gap between the sealing ball 4 and the conical surface. The use of the conical surface and the spherical surface seal has the advantage of ensuring that the sealing line coincides during multiple operations. Therefore, under frequent working conditions, the service life and stability and reliability of the valve body can be guaranteed.

[0034] In this embodiment, the liquid inlet connector 24 includes a liquid inlet, and the liquid control connector 11 includes a liquid control port. The liquid control port is connected to the external oil tank and provides a basis for injecting oil into the external oil tank. It can also provide a basis for discharging oil from the upper valve body 1.

[0035] Preferably, reference Figure 6 The retainer 26 includes a first spring 261 connected to the third groove 27. A T-shaped frame 262 is provided on the first spring 261. A first flow groove 263 is provided through the frame 262. A second spring 263 for placing the sealing ball 4 is provided in the first flow groove 263. Second flow grooves 265 are provided on the frame 262 and on both sides of the first flow groove 263.

[0036] When the sealing ball 4 is pushed downward, the second spring 263 will retract, causing the sealing ball 4 to move into the frame 262. At this time, the liquid will flow into the inner tank 21 through the first flow groove 263 and the second flow groove 265. The arrangement of the first spring 261 can provide a foundation for the installation of the frame 262 and can also make the bottom of the frame 262 face the output port of the liquid inlet connector 24, thereby ensuring the smooth flow of liquid.

[0037] On the contrary, when the driving force acting on the sealing ball 4 disappears, the second spring 263 will rebound. At this time, the liquid will lift the sealing ball 4, so that the sealing ball 4 contacts the inner wall of the conical valve seat, thereby realizing the sealing of the inner groove 21.

[0038] Preferably, reference Figure 2The hydraulic control piston 3 includes a hydraulic seat 31 and a push rod 32 connected to the hydraulic seat 31, and a push pin 33 connected to the push rod 32; a fourth groove 14 is provided in the upper valve body 1 for mounting the hydraulic control joint 11 and the hydraulic control piston 3, a fifth groove 15 is provided inside the fourth groove 14, a third spring 12 is provided at the top of the fifth groove 15, and the top of the third spring 12 is connected to the bottom of the push rod 32;

[0039] The high-pressure oil injected through the hydraulic control joint 11 will first connect with the top of the hydraulic seat 31 and apply downward pressure to the hydraulic seat 31 and the third spring 12. In this state, the third spring 12 will retract and cause the hydraulic seat 31 to move downward. The hydraulic seat 31 will synchronously drive the ejector rod 32 and the ejector pin 33 to move downward, and the ejector pin 33 will apply downward thrust to the sealing ball 4.

[0040] Preferably, a second sealing filler 13 is provided in the fourth tank body 14 , and the second sealing filler 13 is sleeved with the hydraulic seat 31 .

[0041] Preferably, the conical valve seat 6 is made of alloy material and the sealing ball 4 is SI2N3. The conical valve seat 6 made of alloy and the sealing ball 4 made of SI2N3 have increased strength and can withstand ultra-high pressure above 200 MPa, thereby increasing the applicable scenarios of the equipment.

[0042] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. An ultra-high pressure hydraulically controlled pressure relief valve, characterized in that: The cam is secured to the bottom of the valve body with an energizing seal to allow the cam to unclog the valve body and lock the valve body into a cam-shaped groove, which is adapted to move the cam shaft toward the cam face.

2. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 1, characterized in that: The retaining frame includes a first spring connected to the third groove body, a T-shaped frame body is provided on the first spring, a first circulation groove is provided through the frame body, a second spring for placing the sealing ball is provided in the first circulation groove, and a second circulation groove is provided on the frame body and on both sides of the first circulation groove.

3. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 2, characterized in that: The hydraulically controlled piston member includes a hydraulic seat, a push rod connected to the hydraulic seat, and a push pin connected to the push rod.

4. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 3, characterized in that: A fourth slot body is provided in the upper valve body for installation with the hydraulic control joint and the hydraulic control piston member, a fifth slot body is provided inside the fourth slot body, a third spring is provided on the top of the fifth slot body, and the top of the third spring is connected to the bottom of the push rod.

5. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 4, characterized in that: A second sealing filler is provided in the fourth tank body, and the second sealing filler is sleeved with the hydraulic seat.

6. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 1, characterized in that: The conical valve seat is made of alloy material.

7. The ultra-high pressure hydraulically controlled pressure relief valve according to claim 1, characterized in that: The sealing ball is SI2N3.

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