A new type of low temperature safety valve

Abstract

The present application discloses a novel cryogenic safety valve, which relates to the field of safety valves, and comprises a valve body, wherein the inner wall of the valve body is provided with a positioning hole, a positioning block is slidably connected in the positioning hole, a valve stem is passed through the interior of the valve body and the valve stem abuts against the positioning block. The present application has the effect of increasing the service life of the valve body.

Description

Technical Field

[0001] The present application relates to the field of safety valves, and in particular to a novel low-temperature 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 CN203823171U discloses a low-temperature safety valve, which relates to the field of safety devices. The utility model includes a valve body, a sealing gasket arranged in the valve body, a valve disc, a spring, an adjusting nut and a locking nut, wherein the adjusting nut is provided with an adjusting nut axial through hole, the locking nut is installed on the upper side of the adjusting nut, the locking nut is provided with a locking nut axial through hole, the locking nut axial through hole is connected with the adjusting nut axial through hole, and serves as a discharge channel; the valve disc is provided with a valve disc medium flow channel, and the valve disc medium flow channel includes a radial through hole and a valve disc axial hole connecting the radial through hole and the valve body medium flow channel; the side of the sealing gasket is provided with a circumferential anti-deformation groove, the sealing gasket is embedded under the valve disc, and is clamped by the valve disc edge, and the sealing gasket and the conical surface are provided with a sealing sharp corner at the contact point. The utility model has a simple overall structure, is easy to process, has reliable sealing performance, and can be repeatedly adjusted.

[0004] In the process of implementing the above application, the inventor found that there are at least the following problems in this technology: a thread is provided inside the valve body, and the valve body and the valve stem are threadedly connected during installation. However, during long-term use, the thread inside the valve body is continuously flushed by low-temperature liquid, which may cause damage to the thread, making it difficult to remove the valve stem and inconvenient to replace, thereby reducing the service life. Utility Model Content

[0005] In order to increase the service life of the valve body, the present application provides a new type of low-temperature safety valve.

[0006] A novel cryogenic safety valve provided in this application adopts the following technical solution:

[0007] A novel low-temperature safety valve comprises a valve body, wherein the inner wall of the valve body is provided with a positioning hole, a positioning block is slidably connected in the positioning hole, a valve stem is passed through the valve body and the valve stem abuts against the positioning block.

[0008] By adopting the above technical solution, a positioning block is slidably connected in the positioning hole, and the valve stem abuts against the positioning block. During the installation process, it is only necessary to insert the valve stem into the valve body. Under the action of the positioning block, the valve stem will not separate from the valve body, which facilitates the valve stem installation process. At the same time, it improves the prior art that the valve body has threads inside, and the possibility of the threads being damaged after being impacted by liquid for a long time, thereby increasing the service life of the valve body.

[0009] Optionally, the valve stem includes a first valve core and a second valve core, the first valve core is provided with a first flow hole, and a flow tube is fixed to the end of the first valve core, the second valve core is provided with a second flow hole, and the flow tube is passed through the second flow hole.

[0010] By adopting the above technical solution, the circulation tube is arranged in the second circulation hole to connect the first valve core and the second valve core. At the same time, the liquid in the valve body passes through the circulation tube when circulating, and the first circulation hole and the second circulation hole facilitate the liquid circulation process.

[0011] Optionally, a return spring is sleeved on the outer side of the circulation tube, and two ends of the return spring are respectively in contact with the first valve core end surface and the second valve core end surface.

[0012] By adopting the above technical solution, a return spring is sleeved on the outer side of the circulation tube, and both ends of the return spring are respectively abutted against the end face of the first valve core and the end face of the second valve core. The return spring has the function of pushing the first valve core and the second valve core to move in directions away from each other. When the second valve core abuts against the side wall of the positioning block, the first valve core can close the internal space of the valve body. When impacted by liquid, the position of the first valve core moves and the spring contracts, thereby facilitating the liquid circulation process.

[0013] Optionally, an adjusting cylinder is threadedly connected to the inner wall of the second circulation hole, and the circulation tube is inserted into the adjusting cylinder.

[0014] By adopting the above technical solution, an adjusting cylinder is threadedly connected to the inner wall of the second flow hole, and the flow pipe is passed through the adjusting cylinder. By rotating the adjusting cylinder, the distance from the end face of the adjusting cylinder to the end face of the second valve core can be adjusted. Since the flow pipe is passed through the adjusting cylinder, the position of the flow pipe can be adjusted.

[0015] Optionally, a positioning ring is fixed to the end of the flow tube, and the end surface of the positioning ring abuts against the end surface of the adjustment tube.

[0016] By adopting the above technical solution, a positioning ring is fixed at the end of the circulation tube, and the end face of the positioning ring abuts against the end face of the adjusting cylinder. Therefore, by adjusting the position of the adjusting cylinder, the position of the circulation tube is adjusted under the limiting action of the positioning ring, which facilitates the adjustment of the relative distance between the first valve core and the second valve core.

[0017] Optionally, a blocking cylinder is fixed to the end of the first valve core, the blocking cylinder is connected to the first flow hole, and a plurality of water inlet holes are opened on the side wall of the blocking cylinder.

[0018] By adopting the above technical solution, the blocking cylinder is connected to the first circulation hole, and a plurality of water inlet holes are opened on the side wall of the blocking cylinder, so that when the liquid pushes the first valve core to move, it can enter the first circulation hole through the water inlet holes without interfering with the liquid circulation process.

[0019] Optionally, a sealing gasket is fixed to the end of the blocking cylinder, a first inlet hole is opened at the end of the valve body, and the diameter of the sealing gasket is larger than the diameter of the first inlet hole.

[0020] By adopting the above technical solution, the diameter of the sealing gasket is larger than the diameter of the first inlet hole, which facilitates closing the first inlet hole, thereby enhancing the sealing performance of the valve body.

[0021] Optionally, a water inlet guide surface is provided on the inner side wall of the first inlet hole.

[0022] By adopting the above technical solution, a water inlet guide surface is provided on the inner wall of the first inlet hole, which has a diversion effect on the liquid, reduces the possibility of the liquid directly impacting the sealing gasket, and improves the service life of the sealing gasket.

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

[0024] 1. A positioning block is slidably connected in the positioning hole, and the valve stem abuts against the positioning block. During the installation process, the valve stem only needs to be inserted into the valve body. Under the action of the positioning block, the valve stem will not be separated from the valve body, which is convenient for the installation of the valve stem. At the same time, it improves the possibility that the threads in the valve body are damaged after being impacted by liquid for a long time in the prior art, thereby improving the service life of the valve body;

[0025] 2. The plugging cylinder is connected to the first flow hole, and a plurality of water inlet holes are opened on the side wall of the plugging cylinder, so that when the liquid pushes the first valve core to move, it can enter the first flow hole through the water inlet holes, and will not interfere with the liquid flow process. 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. Positioning hole; 3. Positioning block; 4. Valve stem; 5. First valve core; 6. Second valve core; 7. First flow hole; 8. Flow pipe; 9. Second flow hole; 10. Reset spring; 11. Adjustment cylinder; 12. Positioning ring; 13. Blocking cylinder; 14. Water inlet hole; 15. Sealing gasket; 16. First inlet hole; 17. Water inlet guide surface. DETAILED DESCRIPTION

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

[0031] The present application embodiment discloses a novel cryogenic safety valve. Figure 1 and Figure 2 The novel cryogenic safety valve comprises a valve body 1, one end of the valve body 1 is open, and the other end is provided with a first inlet hole 16, the diameter of the first inlet hole 16 is smaller than the diameter of the valve body 1, and the first inlet hole 16 is connected with the inside of the valve body 1, so that the valve body 1 is hollow as a whole, and a plurality of positioning holes 2 are provided on the inner wall of the valve body 1. In this embodiment, the number of the positioning holes 2 is two, and a positioning block 3 is penetrated in the positioning hole 2, and the positioning block 3 can slide in the positioning hole 2, and a positioning elastic sheet is provided in the positioning hole 2, and the positioning elastic sheet is "V"-shaped and is made of elastic metal material, such as a steel sheet, The two ends of the positioning elastic sheet are respectively abutted against the inner bottom of the positioning hole 2 and the end face of the positioning block 3, and the positioning elastic sheet is used to push the positioning block 3 to move in the direction away from the inner bottom of the positioning hole 2. At the same time, the side wall of the positioning block 3 fixes the limiting block by an integral molding manner, and a limiting groove is provided on the inner wall of the positioning hole 2, and the limiting block is penetrated into the limiting groove so that the positioning block 3 will not separate from the positioning hole 2; a valve stem 4 is penetrated inside the valve body 1, and the end of the valve stem 4 abuts against the end face of the positioning block 3 so that the valve stem 4 will not separate from the valve body 1, and a positioning guide surface is provided on the positioning block 3, and the positioning guide surface facilitates the installation process of the valve stem 4.

[0032] Reference Figure 1 and Figure 2The valve stem 4 includes a first valve core 5 and a second valve core 6. The first valve core 5 is provided with a first flow hole 7. The first flow hole 7 is coaxially arranged with the first valve core 5 and penetrates the first valve core 5 along the axial direction of the first valve core 5. The end surface of the first valve core 5 is fixed with a flow tube 8 by an integral molding method. The flow tube 8 is hollow and coaxially arranged with the first valve core 5. The inner side wall of the flow tube 8 is flush with the inner side wall of the first flow hole 7. The second valve core 6 is provided with a second flow hole 9. The flow tube 8 is inserted into the second flow hole 9. The inner side wall of the second flow hole 9 is detachably connected with an adjusting cylinder 11 by a threaded connection. At the same time, the flow tube 8 is inserted into the adjusting cylinder 11. 1, the outer wall of the flow tube 8 abuts against the inner wall of the adjusting cylinder 11, and the position of the adjusting cylinder 11 in the second flow hole 9 can be adjusted by rotating the adjusting cylinder 11. A positioning ring 12 is fixed to the end of the flow tube 8 in an integrally formed manner, and the end face of the positioning ring 12 abuts against the end face of the adjusting cylinder 11. After the position of the adjusting cylinder 11 changes, the relative position between the first valve core 5 and the second valve core 6 changes, so as to adapt to valve bodies 1 with different inner lengths; at the same time, a reset spring 10 is sleeved on the outer wall of the flow tube 8, and the two ends of the reset spring 10 abut against the end faces of the first valve core 5 and the second valve core 6 respectively, and the reset spring 10 is used to push the first valve core 5 and the second valve core 6 to move in a direction away from each other.

[0033] Reference Figure 1 and Figure 2 A sealing cylinder 13 is fixed to the end of the first valve core 5 away from the circulation pipe 8 by an integral molding manner, and a plurality of water inlet holes 14 are opened on the side wall of the sealing cylinder 13. At the same time, the sealing cylinder 13 is connected to the first circulation hole 7, and the inner wall of the sealing cylinder 13 is flush with the inner wall of the first circulation hole 7. The plurality of water inlet holes 14 are evenly distributed around the axis of the sealing cylinder 13. At the same time, the water inlet holes 14 penetrate the side wall of the sealing cylinder 13. A sealing gasket 15 is fixed to the end of the sealing cylinder 13 by bonding. At the same time, the diameter of the sealing gasket 15 is larger than the diameter of the first inlet hole 16, which is convenient for sealing the first inlet hole 16. A water inlet guide surface 17 is opened on the inner wall of the first inlet hole 16. The water inlet guide surface 17 reduces the possibility of water directly impacting the sealing gasket 15 and improves the service life of the sealing gasket 15. The sealing gasket 15 is made of rubber and has a good sealing effect.

[0034] The implementation principle of a new type of low-temperature safety valve in the embodiment of the present application is: assemble the valve body 1, adjust the position of the adjusting cylinder 11, so that the relative distance between the first valve core 5 and the second valve core 6 is adapted to the valve body 1, and insert the valve stem 4 into the valve body 1. Under the action of the positioning block 3, the valve stem 4 is fixed inside the valve body 1. The operation process is simple. At the same time, the liquid flows through the circulation pipe 8 and will not directly contact the spring, which reduces the possibility of damage to the spring in a low-temperature environment, thereby improving the service life of the valve body 1.

[0035] 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 new type of cryogenic safety valve, characterized by: The valve body (1) comprises a valve body (1), wherein the inner wall of the valve body (1) is provided with a positioning hole (2), a positioning block (3) is slidably connected in the positioning hole (2), a valve stem (4) is passed through the interior of the valve body (1) and the valve stem (4) abuts against the positioning block (3).

2. A novel cryogenic safety valve according to claim 1, characterized in that: The valve stem (4) comprises a first valve core (5) and a second valve core (6); the first valve core (5) is provided with a first flow hole (7), and a flow tube (8) is fixed to the end of the first valve core (5); the second valve core (6) is provided with a second flow hole (9), and the flow tube (8) is passed through the second flow hole (9).

3. A novel cryogenic safety valve according to claim 2, characterized in that: The outer side of the circulation tube (8) is sleeved with a return spring (10), and the two ends of the return spring (10) are respectively in contact with the end surface of the first valve core (5) and the end surface of the second valve core (6).

4. A novel cryogenic safety valve according to claim 2, characterized in that: The inner wall of the second circulation hole (9) is threadedly connected with an adjustment cylinder (11), and the circulation pipe (8) is inserted into the adjustment cylinder (11).

5. A novel cryogenic safety valve according to claim 4, characterized in that: A positioning ring (12) is fixed to the end of the flow tube (8), and the end surface of the positioning ring (12) abuts against the end surface of the adjustment tube (11).

6. A novel cryogenic safety valve according to claim 2, characterized in that: A blocking cylinder (13) is fixed to the end of the first valve core (5), the blocking cylinder (13) is connected to the first flow hole (7), and a plurality of water inlet holes (14) are formed on the side wall of the blocking cylinder (13).

7. A novel cryogenic safety valve according to claim 6, characterized in that: A sealing gasket (15) is fixed to the end of the blocking cylinder (13), a first inlet hole (16) is opened at the end of the valve body (1), and the diameter of the sealing gasket (15) is larger than the diameter of the first inlet hole (16).

8. A novel cryogenic safety valve according to claim 7, characterized in that: The inner side wall of the first inlet hole (16) is provided with a water inlet guide surface (17).

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