Novel low-temperature soft-seal full-lift safety valve

Abstract

The utility model discloses a novel low-temperature soft-seal full-lift safety valve, and relates to the technical field of safety valves, the novel low-temperature soft-seal full-lift safety valve comprises a valve body, a first circulation opening and a second circulation opening, the first circulation opening and the second circulation opening are formed in the valve body, a first boss is fixed to the inner side wall of the first circulation opening, and a sealing block used for sealing the first circulation opening is arranged in the valve body in a sliding mode; a first closed ring is fixed to the side wall of the closed block, a second closed ring is fixed to the side wall of the boss, and the side wall of the first closed ring abuts against the side wall of the second closed ring. The sealing structure has the effect of improving the sealing performance.

Description

Technical Field

[0001] The present application relates to the technical field of safety valves, and in particular to a novel low-temperature soft-sealed full-open safety valve. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium outside the system.

[0003] The patent with publication number CN202371240U discloses a soft-sealed safety valve, including a valve body, a valve seat, a valve disc, a recoil disc, a guide sleeve, a valve cover, a spring, a valve stem, and a valve bonnet. The valve seat is made of metal material and fixed in the inner cavity of the valve body. The valve disc is made of rubber material and fixed on the recoil disc by screws. The valve seat sealing surface is a flat structure, mainly the valve disc sealing surface is a small arc-shaped boss set on the flat sealing surface. When the valve is in the open state, the force exerted by the medium discharge on the small arc-shaped boss of the valve disc is small. When the valve is in the closed state, the small arc-shaped boss of the valve disc and the valve seat sealing surface form a linear seal state. The medium impurities are not easily retained between the valve disc and the valve seat sealing surface. It has the advantages of good sealing performance and long service life, and is suitable for overpressure protection devices of high-pressure pipeline containers.

[0004] In the process of realizing the above application, the inventor found that there are at least the following problems in this technology: since the sealing structure of the soft-sealed safety valve is made of elastic materials such as rubber, it is easy to be damaged after a long period of use, resulting in poor sealing performance. Utility Model Content

[0005] In order to improve the sealing performance, the present application provides a new low-temperature soft-sealed full-open safety valve.

[0006] The new low-temperature soft-seal full-open safety valve provided in this application adopts the following technical solution:

[0007] A novel low-temperature soft-sealed full-open safety valve comprises a valve body, a first flow port and a second flow port opened on the valve body, a first boss being fixed to the inner side wall of the first flow port, a closing block for closing the first flow port being slidably arranged inside the valve body, a first closing ring being fixed to the side wall of the closing block, a second closing ring being fixed to the side wall of the boss, and the side wall of the first closing ring abuts against the side wall of the second closing ring.

[0008] By adopting the above technical solution, a first closed ring is fixed to the side wall of the closing block, a second closed ring is fixed to the side wall of the boss, and the side wall of the first closed ring abuts against the side wall of the second closed ring; when the first circulation port is opened, the first closed ring and the second closed ring slide relative to each other, and when the first closed ring and the second closed ring are separated, liquid can flow, and the liquid circulation is controlled by relative sliding, and the sealing between the first closed ring and the second closed ring is better, thereby reducing the possibility of poor sealing effect at the first circulation port.

[0009] Optionally, a positioning groove is formed on the inner side wall of the second closed ring, a sealing ring is fixed to the end of the first closed ring and the sealing ring abuts against the inner bottom of the positioning groove.

[0010] By adopting the above technical solution, the sealing ring is made of rubber material. When the sealing block contacts the first boss to close the first flow opening, the sealing ring abuts against the inner bottom of the positioning groove, thereby further enhancing the sealing between the first closed ring and the second closed ring.

[0011] Optionally, both the first closed ring side wall and the second closed ring side wall are provided with flow holes, and when the sealing ring abuts against the inner bottom of the positioning groove, the flow holes of the first closed ring side wall and the flow holes of the second closed ring side wall are separately arranged.

[0012] By adopting the above technical solution, when the sealing ring abuts against the inner bottom of the positioning groove, the flow holes of the first closed ring side wall and the flow holes of the second closed ring side wall are separately arranged, and when the first flow port is opened, the flow holes of the first closed ring side wall are connected with the flow holes of the second closed ring side wall, which facilitates the liquid transfer process.

[0013] Optionally, a positioning plate is fixed inside the valve body, and a valve stem is slidably arranged on the positioning plate, an end of the valve stem is fixed to an end face of the sealing block, and a pushing spring for pushing the valve stem is arranged inside the valve body.

[0014] By adopting the above technical solution, the positioning rod limits the valve stem, and the push spring facilitates the valve stem to be reset.

[0015] Optionally, a sealing ring is fixed to the end surface of the positioning plate, and the inner wall of the sealing ring is interference fit with the side wall of the valve stem, and the outer wall of the sealing ring is interference fit with the inner wall of the valve body.

[0016] By adopting the above technical solution, the inner wall of the sealing ring and the side wall of the valve stem are interference fit, and the outer wall of the sealing ring and the inner wall of the valve body are interference fit, so that the internal sealing of the valve body is good and the possibility of liquid leakage is reduced.

[0017] Optionally, a first protrusion is fixed to the end of the first boss, and a limiting groove for passing the first protrusion is formed on the closing block.

[0018] By adopting the above technical solution, the first protrusion is inserted into the limiting groove, thereby enhancing the sealing performance at the first flow opening.

[0019] Optionally, a water inlet is detachably connected to the bottom of the valve body, and the first flow port is opened in the water inlet.

[0020] By adopting the above technical solution, the water inlet part can be disassembled, which is convenient for installation and disassembly of the internal parts of the valve body and for replacement when the internal parts are damaged.

[0021] Optionally, the second flow port is disposed on the side wall of the valve body.

[0022] By adopting the above technical solution, the second flow port is arranged on the side wall of the valve body, so as to facilitate the transfer of liquid inside the valve body to the outside of the valve body.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. A first closed ring is fixed to the side wall of the closed block, a second closed ring is fixed to the side wall of the boss, and the side wall of the first closed ring abuts against the side wall of the second closed ring; when the first circulation port is opened, the first closed ring and the second closed ring slide relative to each other, and when the first closed ring and the second closed ring are separated, liquid can flow, and the liquid flow is controlled by relative sliding, and the sealing performance between the first closed ring and the second closed ring is good, which reduces the possibility of poor sealing effect at the first circulation port;

[0025] 2. The water inlet part is detachable, which is convenient for the installation and removal of the internal parts of the valve body and for replacement when the internal parts are damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the main structure of the embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A.

[0028] Description of reference numerals:

[0029] 1. Valve body; 2. First flow port; 3. Second flow port; 4. First boss; 5. Closing block; 6. First closing ring; 7. Second closing ring; 8. Positioning groove; 9. Sealing ring; 10. Flow hole; 11. Positioning plate; 12. Valve stem; 13. Push spring; 14. Sealing ring; 15. First protrusion; 16. Limiting groove; 17. Water inlet. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application discloses a novel low-temperature soft-sealed full-open safety valve. Figure 1 and Figure 2 The novel low-temperature soft-seal full-open safety valve comprises a valve body, a first flow port and a second flow port are provided on the valve body, the first flow port facilitates the transfer of liquid to the inside of the valve body, and the second flow port facilitates the transfer of liquid in the valve body to the outside of the valve body, and the first flow port is arranged at the end of the valve body, and the second flow port is arranged at the side wall of the valve body, the inner side wall of the first flow port is fixed with a first boss by an integral molding method, and a closing block is slidably arranged inside the valve body, the closing block can slide inside the valve body and contact the first boss to seal the first flow port, the side wall of the closing block is fixed with a first closing ring by an integral molding method, and the side wall of the first boss is fixed with a second closing ring by an integral molding method, the outer side wall of the first closing ring abuts against the inner side wall of the second closing ring, and the closing block movably drives the second closing ring to move, so that the second closing ring and the first closing ring can move relative to each other.

[0032] Reference Figure 1 and Figure 2 A positioning groove is provided on the inner side wall of the second closed ring, and the first closed ring is inserted into the positioning groove. At the same time, a sealing ring is fixed to the end of the first closed ring by bonding. The sealing ring is made of rubber. When the closing block closes the first flow opening, the sealing ring abuts against the bottom of the inner side of the positioning groove, thereby completing the sealing between the first closed ring and the second closed ring.

[0033] Reference Figure 1 and Figure 2 , the first closed ring side wall and the second closed ring side wall are both provided with flow holes, the flow holes penetrate the side walls of the first closed ring and the second closed ring, and at the same time, when the sealing ring abuts against the inner bottom of the positioning groove, the flow holes on the first closed ring and the flow holes on the second closed ring are separated, that is, liquid will not pass through them, when the closing block is separated from the first boss to open the first flow port, the liquid enters the valve body from the first flow port and gathers between the first closed ring and the second closed ring, because the movement of the closing block drives the movement of the first closed ring, the flow holes on the side wall of the first closed ring are connected with the flow holes on the side wall of the second closed ring, so that the liquid is transferred to the second flow port, and at the same time, according to the different water pressures, the structure can adaptively adjust the liquid flow rate, and the size of the communicating part of the flow holes on the first closed ring and the second closed ring changes with the change of liquid pressure, and its adaptive effect is better.

[0034] Reference Figure 1 and Figure 2A positioning plate is fixed inside the valve body by an integral molding method, a positioning hole is opened on the positioning plate, and the positioning hole is coaxially arranged with the positioning plate, a valve stem is passed through the positioning hole, and the valve stem can slide in the positioning hole, that is, a valve stem is slidably arranged on the positioning plate, and the end of the valve stem is fixed to the end face of the sealing block by bonding or threaded connection, and at the same time, a push spring is arranged inside the valve body, and a push plate is integrally formed on the side wall of the valve stem, the push spring abuts against the push plate, and can drive the valve stem to move, so that the valve stem drives the closing block to move, and the first flow port is closed.

[0035] Reference Figure 1 and Figure 2 A sealing ring is fixed to the end face of the positioning plate by bonding, and the sealing ring is made of rubber. The inner wall of the sealing ring has an interference fit with the side wall of the valve stem, and the outer wall of the sealing ring has an interference fit with the inner wall of the valve body, so that the inner and outer walls of the sealing ring both have a sealing effect, reducing the possibility of liquid leakage inside the valve body; at the same time, a first protrusion is fixed to the end of the first boss by an integral molding manner, and the first protrusion is arranged in an arc shape. A limiting groove is provided on the closing block, and the limiting groove is used to penetrate the first protrusion. The first protrusion is penetrated in the limiting groove, thereby improving the sealing performance at the first flow port.

[0036] Reference Figure 1 and Figure 2 The bottom of the valve body is detachably connected to a water inlet by a threaded connection, and the first flow port is opened in the water inlet, and the water inlet is penetrated at the same time. Such an arrangement allows the water inlet to be disassembled, which is convenient for the installation of internal parts of the valve body.

[0037] The implementation principle of a new type of low-temperature soft-sealed full-open safety valve in the embodiment of the present application is as follows: liquid enters the interior of the valve body from the first flow port and gathers between the first closed ring and the second closed ring. Since the movement of the closing block drives the movement of the first closed ring, the flow holes on the side wall of the first closed ring are connected with the flow holes on the side wall of the second closed ring, which facilitates the transfer of liquid to the second flow port. At the same time, according to different water pressures, the structure can adaptively adjust the liquid flow rate. The size of the connecting part of the flow holes on the first closed ring and the second closed ring changes with the change of liquid pressure, and its adaptive effect is good.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel low-temperature soft-sealed full-open safety valve, comprising a valve body (1), a first flow port (2) and a second flow port (3) provided on the valve body (1), Features: A first boss (4) is fixed to the inner side wall of the first flow port (2); a closing block (5) is slidably arranged inside the valve body (1) for closing the first flow port (2); a first closing ring (6) is fixed to the side wall of the closing block (5); a second closing ring (7) is fixed to the side wall of the first boss (4), and the side wall of the first closing ring (6) abuts against the side wall of the second closing ring (7).

2. According to the new low-temperature soft-sealed full-open safety valve of claim 1, Features: The inner wall of the second closed ring (7) is provided with a positioning groove (8), and a sealing ring (9) is fixed to the end of the first closed ring (6), and the sealing ring (9) abuts against the inner bottom of the positioning groove (8).

3. According to the new low-temperature soft-sealed full-open safety valve of claim 2, Features: The side wall of the first closed ring (6) and the side wall of the second closed ring (7) are both provided with flow holes (10), and when the sealing ring (9) abuts against the inner bottom of the positioning groove (8), the flow holes (10) of the side wall of the first closed ring (6) and the flow holes (10) of the side wall of the second closed ring (7) are arranged separately.

4. According to the new low-temperature soft-sealed full-open safety valve of claim 1, Features: A positioning plate (11) is fixed inside the valve body (1), and a valve stem (12) is slidably arranged on the positioning plate (11), the end of the valve stem (12) is fixed to the end surface of the sealing block, and a pushing spring (13) for pushing the valve stem (12) is arranged inside the valve body (1).

5. According to the new low-temperature soft-sealed full-open safety valve described in claim 4, Features: A sealing ring (14) is fixed to the end surface of the positioning plate (11), and the inner wall of the sealing ring (14) is interference fit with the side wall of the valve stem (12), and the outer wall of the sealing ring (14) is interference fit with the inner wall of the valve body (1).

6. The new low-temperature soft-sealed full-open safety valve according to claim 1, Features: A first protrusion (15) is fixed to the end of the first boss (4), and a limiting groove (16) for passing the first protrusion (15) is provided on the closing block (5).

7. The new low-temperature soft-sealed full-open safety valve according to claim 1, Features: The bottom of the valve body (1) is detachably connected to a water inlet (17), and the first flow port (2) is opened in the water inlet (17).

8. The new low-temperature soft-sealed full-open safety valve according to claim 1, Features: The second flow port (3) is disposed on the side wall of the valve body (1).

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