Low-temperature micro-lift safety valve

Abstract

The utility model discloses a low-temperature micro-lift safety valve, and relates to the technical field of safety valves. The inlet and the outlet are formed in the valve body, a sealing block is arranged in the valve body in a sliding mode, a limiting groove is formed in the sealing block, a pushing block is detachably connected into the limiting groove, and a pushing spring used for pushing the pushing block is arranged in the valve body. The valve rod has the effect of prolonging the service life of the valve rod.

Description

Technical Field

[0001] The present application relates to the technical field of safety valves, and in particular to a low-temperature micro-opening 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 CN208024893U discloses a low-temperature and high-pressure micro-opening safety valve, which relates to the technical field of special valve equipment. The utility model comprises a valve body (1), a valve seat (2), a valve cover (3), a valve top (4), a valve stem (5), and a spring (6). The valve seat (2) is installed in a channel of the valve body (1) through a thread, the valve cover (3) is sleeved above the valve seat (2), and the valve stem (5) is installed in the valve cover (3) through a spring (6). The utility model is characterized in that: a conical sealing surface (7) is arranged above the valve seat (2), a sealing convex ball (8) matching the conical sealing surface (7) is arranged below the valve top (4), the valve top (4) is installed directly above the conical sealing surface (7) of the valve seat (2) through the valve stem (5), and a surfacing alloy buffer layer (9) is also provided on the inner side of the conical sealing surface (7), and the surfacing alloy buffer layer (9) is consistent with the shape of the conical sealing surface (7). The utility model has the advantages of improving the service life and working stability of the safety valve.

[0004] In the process of implementing the above application, the inventor found that there are at least the following problems in this technology: a valve stem is used in the valve body to push the sealing block to move, thereby sealing the inlet, but the valve stem is relatively long, so there will be some redundancy during manufacturing, which reduces the economic benefits. At the same time, a long valve stem is prone to damage to the valve stem, thereby reducing its service life. Utility Model Content

[0005] In order to increase the service life of the valve stem, the present application provides a low-temperature micro-opening safety valve.

[0006] The low-temperature micro-opening safety valve provided in this application adopts the following technical solution:

[0007] A low-temperature micro-opening safety valve comprises a valve body; an inlet and an outlet are provided on the valve body, a sealing block is slidably arranged inside the valve body, a limiting groove is provided on the sealing block, and a pushing block is detachably connected to the limiting groove, and a pushing spring for pushing the pushing block is provided in the valve body.

[0008] By adopting the above technical solution, the valve stem positioning and pushing mode in the prior art is improved, and is changed to a block-shaped pushing block. Compared with the existing rod-shaped one, the block-shaped one saves more materials and improves the economic benefits. At the same time, the pushing block is inserted into the limit groove, which reduces the possibility of the pushing block position being offset and has better stability. At the same time, its length is shortened and its service life is improved.

[0009] Optionally, a reset groove is provided at the bottom of the inner side wall of the limiting groove, the end of the pushing block is arc-shaped and penetrates the reset groove, and a pushing plate is fixed to the side wall of the pushing block and the pushing plate abuts against the end face of the sealing block.

[0010] By adopting the above technical solution, the end of the pushing block is arc-shaped and is inserted into the reset groove. The shape of the reset groove is the same as that of the end of the pushing block, both of which are arc-shaped. Therefore, when the pushing block is placed in the reset groove, it has an automatic reset function, which makes it easy to make the pushing block and the sealing block coaxially arranged, thereby facilitating the sealing process.

[0011] Optionally, the side wall of the sealing block abuts against the inner wall of the valve body, and the side wall of the sealing block is provided with a plurality of flow grooves.

[0012] By adopting the above technical solution, after the liquid enters the valve body from the inlet, it can be transferred to the outlet through the circulation groove and then to the outside of the valve body. The circulation groove plays a flow limiting role and can adaptively adjust the flow rate according to the liquid flow pressure, with a high degree of adaptability.

[0013] Optionally, the width of the circulation groove near the inlet is greater than the width of the circulation groove near the outlet.

[0014] By adopting the above technical solution, the width of the circulation groove near the inlet is greater than the width near the outlet. The change in the position of the sealing block drives the change in the position of the circulation groove. After the position of the circulation groove is changed, due to the difference in its width, the liquid flow rate that can pass through it is also different after the position is changed.

[0015] Optionally, a replacement groove is formed at the end of the sealing block close to the inlet, a replacement block is fixed in the replacement groove, and the replacement block abuts against the inner side wall of the inlet.

[0016] By adopting the above technical solution, the replacement block abuts against the inner wall of the inlet, thereby sealing the inlet. At the same time, when the replacement block fails to seal, the replacement block can be replaced individually without replacing the sealing block as a whole. The replacement process is simple and the economic benefits are improved.

[0017] Optionally, the end of the valve body facing away from the inlet is opened, and an adjustment block is slidably provided on the inner side wall of the valve body opening; the push spring abuts against the end face of the adjustment block.

[0018] By adopting the above technical solution, an adjustment block is slidably provided on the inner wall of the valve body opening, and the end of the push spring abuts against the end face of the adjustment block. The high elastic force of the push spring can be adjusted by adjusting the position of the adjustment block, thereby adjusting the pressure of the sealing block on the inlet, which is convenient for adjusting the flow rate process.

[0019] Optionally, a limit block for limiting the position of the push spring is fixed to the end surface of the push block.

[0020] By adopting the above technical solution, the limit block has a limiting effect on the push spring, thereby reducing the possibility of the push spring position being offset.

[0021] Optionally, a valve cap is detachably connected to the opening at the end of the valve body.

[0022] By adopting the above technical solution, the valve cap seals the valve body and enhances the aesthetics of the valve body.

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

[0024] 1. The valve stem positioning and pushing mode in the prior art is improved, and the block-shaped pushing block is used for pushing. Compared with the existing rod-shaped one, the block-shaped one saves more materials and improves economic benefits. At the same time, the pushing block is inserted into the limit groove, which reduces the possibility of displacement of the pushing block position and has better stability. At the same time, its length is shortened and its service life is improved.

[0025] 2. The replacement block abuts against the inner wall of the inlet, thereby sealing the inlet. When the replacement block fails to seal, the replacement block can be replaced individually without replacing the sealing block as a whole. The replacement process is simple and the economic benefits are improved. 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 It is a schematic diagram of the flow slot position.

[0028] Description of reference numerals:

[0029] 1. Valve body; 2. Inlet; 3. Outlet; 4. Sealing block; 5. Limiting groove; 6. Pushing block; 7. Pushing spring; 8. Reset groove; 9. Pushing plate; 10. Circulation groove; 11. Replacement block; 12. Adjustment block; 13. Limiting block; 14. Valve cap; 15. Replacement groove. DETAILED DESCRIPTION

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

[0031] The present application discloses a low temperature micro-opening safety valve. Figure 1 and Figure 2 The low-temperature micro-opening safety valve comprises a valve body 1, which is hollow and has an inlet 2 and an outlet 3. The inlet 2 is arranged at the end of the valve body 1, and the inlet 2 is convenient for liquid to enter the inside of the valve body 1. The outlet 3 is arranged at the side wall of the valve body 1, and the outlet 3 is convenient for the liquid in the valve body 1 to be transferred to the outside of the valve body 1; a sealing block 4 is slidingly arranged inside the valve body 1, and the sealing block 4 slides along the length direction of the valve body 1 inside the valve body 1 and is used for sealing at the inlet 2. A limiting groove 5 is arranged on the sealing block 4, and a pushing block 6 is penetrated in the limiting groove 5, and the pushing block 6 is detachably connected to the inner side wall of the limiting groove 5. A pushing spring 7 is arranged in the valve body 1, and the pushing spring 7 is used to push the pushing block 6 to move. At the same time, since the pushing block 6 is penetrated in the limiting groove 5, the pushing spring 7 pushes the pushing block 6 to move and pushes the sealing block 4 to move at the same time, so that the inlet 2 is closed.

[0032] Reference Figure 1 and Figure 2 A reset groove 8 is provided at the bottom of the inner side wall of the limit groove 5, and the end of the push block 6 placed inside the limit groove 5 is arranged in an arc shape, and the arc-shaped part is penetrated in the reset groove 8. The shape of the reset groove 8 is adapted to the shape of the arc-shaped end of the push block 6, and both are arranged in an arc shape, so that the end of the push block 6 has an automatic return function in the limit groove 5, and the push block 6 is kept in abutment with the sealing block 4. The side wall of the push block 6 is fixed with a push plate 9 in an integral molding manner, and the end face of the push plate 9 abuts against the end face of the sealing block 4, thereby ensuring the stability between the push block 6 and the sealing block 4; since the push block 6 is not rod-shaped, the block form saves more materials and improves the economic benefits compared to the valve stem currently on the market.

[0033] Reference Figure 1 and Figure 2 , the side wall of the sealing block 4 abuts against the inner wall of the valve body 1, which enhances the sealing performance of the sealing block 4. At the same time, the end face of the sealing block 4 abuts against the inlet 2, which further enhances the sealing performance of the sealing block 4. A number of flow grooves 10 are opened on the side wall of the sealing block 4, and the number of flow grooves 10 are evenly distributed around the axis of the sealing block 4. At the same time, the width of the flow groove 10 near the inlet 2 is greater than the width near the outlet 3. When the end of the sealing block 4 abuts against the inlet 2 and seals the inlet 2, the liquid cannot flow at this time, and the top of the sealing block 4 is flush with the bottom of the outlet 3. When the impact force of the liquid increases and pushes the sealing block 4 to move, the liquid enters the valve body 1 from the inlet 2. At this time, since the sealing block 4 is pushed, the position of the flow groove 10 changes. Since the width of the flow groove 10 is different, when the position of the flow groove 10 changes, its flow rate is different, which has the function of adapting to the flow rate at the inlet 2, thereby enhancing the adaptability of the valve body 1.

[0034] Reference Figure 1 and Figure 2 A replacement groove 15 is provided at the end of the sealing block 4 close to the inlet 2, and a replacement block 11 is inserted into the replacement groove 15, and the replacement block 11 is fixed to the inner wall of the replacement groove 15 by bonding or clamping. At the same time, the replacement block 11 abuts against the inner wall of the inlet 2, and an abutting guide surface is provided on the inner wall of the inlet 2. The end of the replacement block 11 abuts against the abutting guide surface. At the same time, the replacement block 11 can be made of a rigid material or an elastic material. In this embodiment, the replacement block 11 is a rubber block, which is convenient for enhancing the sealing at the inlet 2.

[0035] Reference Figure 1 and Figure 2 , the end of the valve body 1 away from the inlet 2 is open, which is convenient for installing the internal parts of the valve body 1. At the same time, an adjusting block 12 is slidably provided on the inner side wall of the opening of the valve body 1. The adjusting block 12 is fixed to the inner side wall of the opening of the valve body 1 by threaded connection. By rotating the adjusting block 12, the adjusting block 12 can be slid inside the valve body 1, so as to adjust the position of the adjusting block 12 inside the valve body 1. One end of the push spring 7 abuts against the end face of the push block 6, and the other end abuts against the end face of the adjusting block 12. By adjusting the position of the adjusting block 12, the elastic force of the spring can be adjusted, so as to facilitate the adjustment of the liquid flow inside the valve body 1; the end face of the push block 6 is fixed with a limiting block 13 by an integral molding method, and the limiting block 13 is penetrated inside the push spring 7, which is convenient for positioning the push spring 7 and reduces the possibility of displacement of the position of the push spring 7; at the same time, the outer side wall of the opening at the end of the valve body 1 is detachably connected with a valve cap 14 by threaded connection. The valve cap 14 is used to close the opening of the valve body 1, which enhances the sealing performance and the aesthetics.

[0036] The implementation principle of a low-temperature micro-opening safety valve in an embodiment of the present application is as follows: when the internal structure of the valve body 1 is installed, the end of the sealing block 4 abuts against the inlet 2 and seals the inlet 2. At this time, the liquid cannot flow, and the top of the sealing block 4 is flush with the bottom of the outlet 3. When the impact force of the liquid increases and pushes the sealing block 4 to move, the liquid enters the valve body 1 from the inlet 2. At this time, since the sealing block 4 is pushed, the position of the circulation groove 10 changes. Since the width of the circulation groove 10 is different, when the position of the circulation groove 10 changes, its flow rate is different, which has the function of adapting to the flow at the inlet 2, thereby enhancing the adaptability of the valve body 1.

[0037] 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 low-temperature micro-opening safety valve, comprising a valve body (1); an inlet (2) and an outlet (3) provided on the valve body (1), characterized in that: A sealing block (4) is slidably arranged inside the valve body (1), a limiting groove (5) is provided on the sealing block (4), and a pushing block (6) is detachably connected to the limiting groove (5), a pushing spring (7) for pushing the pushing block (6) is arranged in the valve body (1), a side wall of the sealing block (4) abuts against an inner side wall of the valve body (1), and a plurality of flow grooves (10) are provided on the side wall of the sealing block (4), and the width of the flow groove (10) near the inlet (2) is greater than the width near the outlet (3).

2. A low temperature micro-opening safety valve according to claim 1, characterized in that: A reset groove (8) is provided at the bottom of the inner side wall of the limiting groove (5); the end of the pushing block (6) is arc-shaped and penetrates the reset groove (8); a pushing plate (9) is fixed to the side wall of the pushing block (6), and the pushing plate (9) abuts against the end surface of the sealing block (4).

3. A low temperature micro-opening safety valve according to claim 1, characterized in that: The sealing block (4) is provided with a replacement groove (15) at the end close to the inlet (2), a replacement block (11) is fixed in the replacement groove (15), and the replacement block (11) abuts against the inner side wall of the inlet (2).

4. A low temperature micro-opening safety valve according to claim 1, characterized in that: The end of the valve body (1) facing away from the inlet (2) is open, and an adjustment block (12) is slidably arranged on the inner side wall of the opening of the valve body (1); the push spring (7) abuts against the end surface of the adjustment block (12).

5. A low temperature micro-opening safety valve according to claim 4, characterized in that: A limit block (13) for limiting the position of the push spring (7) is fixed on the end surface of the push block (6).

6. A low temperature micro-opening safety valve according to claim 4, characterized in that: A valve cap (14) is detachably connected to the opening at the end of the valve body (1).

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