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

Abstract

The utility model discloses a novel low-temperature hard-seal full-lift safety valve, and relates to the technical field of safety valves, the novel low-temperature hard-seal full-lift safety valve comprises a valve body, a first circulation opening and a second circulation opening are formed in the valve body, a limiting cylinder is fixed in the valve body, a sealing cylinder is arranged in the limiting cylinder in a sliding mode, and two limiting rings are fixed on the inner side wall of the limiting cylinder; the diameter of the sealing cylinder is larger than that of the inner side wall of the limiting ring and smaller than that of the inner side wall of the limiting cylinder. The valve has the effect of prolonging the service life of the valve body.

Description

Technical Field

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

[0002] A safety valve is a valve that serves as a fault protection.

[0003] The patent with publication number CN212273172U discloses a hard-sealed safety valve, comprising a valve body, an air inlet pipe is provided near the center position of the bottom outer wall of the valve body, a connecting piece is provided at the bottom end of the air inlet pipe, an air outlet pipe is provided on the circumferential outer wall of the valve body, a threaded hole is provided on the circumferential outer wall of the air outlet pipe, a noise whistle is provided on the threaded hole, a connecting block is provided at the bottom end of the noise whistle, a pronunciation port is provided on the outer wall of the noise whistle, an opening is provided near the center position of the top outer wall of the valve body, and a nut is tightly welded on the inner wall of the opening, a threaded rod is provided in the nut, a handle is welded on the top end of the threaded rod, a connecting plate is fixed to the bottom end of the threaded rod by bolts, a guide rod is provided at the bottom of the connecting plate, a pressure plate is welded on the guide rod, and a spring is provided under the guide rod. When air leakage occurs, the hard-sealed safety valve is convenient for staff to discover and deal with it in time, and has high safety performance.

[0004] In the process of implementing the above application, the inventor found that there are at least the following problems in this technology: when the above valve body is in use, if it encounters a situation where the liquid impact force is large and lasts for a long time, the spring inside the valve body may be damaged, thereby reducing the service life of the valve body. Utility Model Content

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

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

[0007] A novel low-temperature hard-sealed full-opening safety valve comprises a valve body, wherein a first flow port and a second flow port are formed on the valve body, a limiting cylinder is fixed inside the valve body, a sealing cylinder is slidably arranged inside the limiting cylinder, two limiting rings are fixed to the inner side wall of the limiting cylinder, and the diameter of the sealing cylinder is larger than the diameter of the inner side wall of the limiting ring and smaller than the diameter of the inner side wall of the limiting cylinder.

[0008] By adopting the above technical scheme, a limiting ring is fixed on the inner wall of the limiting cylinder, and the diameter of the sealing cylinder is larger than the diameter of the inner wall of the limiting ring and smaller than the diameter of the inner wall of the limiting cylinder. When the sealing cylinder abuts against the end faces of the two limiting rings, sealing can be completed. Therefore, during the working process, when the impact force of the liquid is insufficient, the sealing cylinder abuts against the lower limiting ring and completes the sealing. When the impact force of the liquid is too large, the sealing cylinder abuts against the end face of the higher limiting ring and completes the sealing, which is convenient for limiting the liquid flow rate so that the liquid can circulate only within a certain flow range. At the same time, the limiting ring plays a limiting role on the sealing cylinder, reducing the possibility of damage to the sealing cylinder due to large impact force.

[0009] Optionally, a valve stem is slidably arranged in the valve body, and the valve stem is fixed to the end of the sealing cylinder, and a pushing spring for pushing the valve stem is arranged inside the valve body.

[0010] By adopting the above technical solution, the push spring is used to push the valve stem to reset, thereby pushing the sealing cylinder to reset. At the same time, the valve stem has a limiting effect, which reduces the possibility of the sealing cylinder position shifting.

[0011] Optionally, a push plate is fixed to the side wall of the valve stem, and the push spring abuts against the end surface of the push plate.

[0012] By adopting the above technical solution, the push spring abuts against the end surface of the push plate, and the push plate is fixed to the side wall of the valve stem. The movement of the push plate can drive the valve stem to move, which is convenient for controlling the valve stem resetting process.

[0013] Optionally, an adjusting block is detachably connected to the end of the valve body, the first flow port is opened in the adjusting block and passes through the adjusting block, and the limiting cylinder is detachably connected to the inner wall of the adjusting block.

[0014] By adopting the above technical solution, the first flow port is opened in the adjusting block and passes through the adjusting block, and the limiting cylinder is detachably connected to the inner wall of the adjusting block. By adjusting the position of the limiting cylinder inside the adjusting block, the upper and lower positions of the sealing cylinder can be adjusted to adapt to different working environments.

[0015] Optionally, the end of the sealing tube close to the valve stem is closed, and the end of the sealing tube away from the valve stem is open.

[0016] By adopting the above technical solution, the end of the sealing cylinder close to the valve stem is closed, which is convenient for connecting the sealing cylinder and the valve stem, and the end of the sealing cylinder away from the valve stem is open, which reduces the weight of the sealing cylinder and facilitates the movement of the sealing cylinder by the liquid.

[0017] Optionally, the end of the valve body away from the first flow port is opened, the end of the valve body away from the first flow port is detachably connected to a positioning cylinder, and the valve stem is slidably disposed in the positioning cylinder.

[0018] By adopting the above technical solution, the valve stem is slidably arranged on the positioning cylinder, and the positioning cylinder limits the valve stem, ensuring that the valve stem will not deviate during operation, thereby ensuring that the sealing cylinder will not deviate during operation.

[0019] Optionally, a sealing cover is detachably connected to the end of the valve body away from the first flow port.

[0020] By adopting the above technical solution, the sealing cover seals the end of the valve body, thereby ensuring the sealing performance of the valve body and reducing the possibility of liquid leakage.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. A limiting ring is fixed on the inner wall of the limiting cylinder. The diameter of the sealing cylinder is larger than the inner wall diameter of the limiting ring and smaller than the inner wall diameter of the limiting cylinder. When the sealing cylinder abuts against the end faces of the two limiting rings, sealing can be completed.

[0023] 2. During the working process, when the impact force of the liquid is insufficient, the sealing cylinder abuts against the lower limit ring and completes the seal. When the impact force of the liquid is too large, the sealing cylinder abuts against the end face of the higher limit ring and completes the seal, which is convenient for limiting the liquid flow so that the liquid can flow only within a certain flow range. At the same time, the limit ring plays a limiting role on the sealing cylinder, reducing the possibility of damage to the sealing cylinder due to large impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the main structure of the embodiment of the present application.

[0025] Figure 2 yes Figure 1 Enlarged view of part A.

[0026] Description of reference numerals:

[0027] 1. Valve body; 2. First flow port; 3. Second flow port; 4. Limiting cylinder; 5. Sealing cylinder; 6. Limiting ring; 7. Valve stem; 8. Push spring; 9. Push plate; 10. Adjusting block; 11. Positioning cylinder; 12. Sealing cover. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-2 This application is described in further detail.

[0029] The embodiment of the present application discloses a new type of low temperature hard seal full start safety valve. Figure 1 and Figure 2The new low-temperature hard-sealed full-opening safety valve includes a valve body 1, on which a first flow port 2 and a second flow port 3 are provided. The first flow port 2 and the second flow port 3 are both used to transfer liquid. The first flow port 2 is provided at the end of the valve body 1 to facilitate the transfer of liquid to the inside of the valve body 1. The second flow port 3 is provided on the side wall of the valve body 1 to facilitate the transfer of liquid inside the valve body 1 to the outside of the valve body 1.

[0030] Reference Figure 1 and Figure 2 The end of the valve body 1 is detachably connected to an adjusting block 10 by means of a threaded connection. The first flow port 2 is opened in the adjusting block 10 and the first flow hole penetrates the adjusting block 10 along the axial direction of the valve body 1. A limiting cylinder 4 is fixed inside the valve body 1. The limiting cylinder 4 is hollow and detachably connected to the inner wall of the adjusting block 10 by means of a threaded connection. A sealing cylinder 5 is slidably provided on the inner wall of the limiting cylinder 4. Two limiting rings 6 are fixed to the inner wall of the limiting cylinder 4 by means of an integral molding. The two limiting rings 6 are respectively placed at both ends of the limiting cylinder 4. At the same time, the side wall of the sealing cylinder 5 is integrally molded. The sealing ring is fixed in a manner, the outer wall diameter of the sealing cylinder 5 is smaller than the inner wall diameter of the limiting ring 6, the outer wall diameter of the sealing ring is larger than the inner wall diameter of the limiting ring 6, and smaller than the inner wall diameter of the limiting cylinder 4, so that the sealing cylinder 5 can move in the limiting cylinder 4, and when the sealing ring contacts the limiting ring 6 close to the first flow port 2, it plays a sealing role. When the sealing ring contacts the limiting ring 6 far away from the first flow port 2, it can also play a limiting role, so that the impact force of the water flow can pass through the valve body 1 only within a specific range, and the water flow impact force that is too large or too small cannot pass through the valve body 1.

[0031] Reference Figure 1 and Figure 2 A valve stem 7 is slidably provided inside the valve body 1. The valve stem 7 can slide inside the valve body 1 along the axial direction of the valve body 1. The end of the valve stem 7 is fixed to the end of the sealing cylinder 5 by bolt connection. The valve stem 7 limits the sealing cylinder 5, reducing the possibility of position deviation during the sliding of the sealing cylinder 5. A push spring 8 is provided in the valve body 1. The push spring 8 is used to push the valve stem 7 to move toward the direction close to the first flow port 2, thereby driving the sealing cylinder 5 to move toward the first flow port 2 to complete the sealing of the first flow port 2.

[0032] Reference Figure 1 and Figure 2, a push plate 9 is fixed to the side wall of the valve stem 7 by an integral molding method, and the push plate 9 is coaxially arranged with the valve stem 7. One end of the push spring 8 abuts against the inner end of the valve body 1, and the other end abuts against the end face of the push plate 9, so as to facilitate the movement of the valve stem 7. At the same time, the end of the valve body 1 away from the first flow port 2 is open, and the opening is detachably connected with a positioning cylinder 11 by a threaded connection. The valve stem 7 is penetrated by the positioning cylinder 11, and the outer side wall of the valve stem 7 is attached to the inner side wall of the positioning cylinder 11. At the same time, the valve stem 7 can slide in the positioning cylinder 11 along the axial direction of the positioning cylinder 11, that is, the valve stem 7 is slidably arranged in the positioning cylinder 11, and the positioning cylinder 11 has a limiting effect on the valve stem 7, reducing the possibility of the position of the valve stem 7 being offset, thereby ensuring that the position of the sealing cylinder 5 will not be offset. The end of the valve body 1 away from the first flow port 2 is detachably connected with a sealing cover 12 by a threaded connection. The sealing cover 12 is used to seal the end of the valve body 1 to ensure the sealing of the end of the valve body 1.

[0033] Reference Figure 1 and Figure 2 The end of the sealing cylinder 5 close to the valve stem 7 is closed to facilitate connection with the valve stem 7, and the end of the sealing cylinder 5 away from the valve stem 7 is open. During the liquid transfer process, the liquid enters the sealing cylinder 5 through the opening from the first flow port 2, which facilitates the movement of the sealing cylinder 5.

[0034] The implementation principle of a new type of low-temperature hard-sealed full-open safety valve in the embodiment of the present application is as follows: during the operation of the valve body 1, the sealing ring on the sealing cylinder 5 first abuts against the limiting ring 6 close to the first flow port 2. At this time, the liquid cannot flow. When the impact force of the liquid increases, the sealing cylinder 5 is pushed to move. At this time, the liquid flows normally. When the impact force of the liquid is too large, the sealing ring abuts against the limiting ring 6 away from the first flow port 2. At this time, the sealing ring is re-sealed and the liquid cannot continue to flow. This arrangement allows the liquid to flow only within a certain range, reducing the possibility of damaging the push spring 8 due to excessive impact force.

[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 low temperature hard seal full start safety valve, Features: The invention comprises a valve body (1), wherein the valve body (1) is provided with a first flow opening (2) and a second flow opening (3), wherein a limiting cylinder (4) is fixed inside the valve body (1), wherein a sealing cylinder (5) is slidably arranged inside the limiting cylinder (4), wherein two limiting rings (6) are fixed to the inner side wall of the limiting cylinder (4), and wherein the diameter of the sealing cylinder (5) is larger than the diameter of the inner side wall of the limiting ring (6) and smaller than the diameter of the inner side wall of the limiting cylinder (4).

2. According to the new low-temperature hard-sealed full-open safety valve described in claim 1, Features: A valve stem (7) is slidably arranged inside the valve body (1), and the valve stem (7) is fixed to the end of the sealing cylinder (5). A pushing spring (8) for pushing the valve stem (7) is arranged inside the valve body (1).

3. According to the new low-temperature hard-sealed full-open safety valve of claim 2, Features: A push plate (9) is fixed to the side wall of the valve stem (7), and the push spring (8) abuts against the end surface of the push plate (9).

4. According to the new low-temperature hard-sealed full-open safety valve of claim 1, Features: The end of the valve body (1) is detachably connected to an adjusting block (10), the first flow port (2) is opened in the adjusting block (10) and penetrates the adjusting block (10), and the limiting cylinder (4) is detachably connected to the inner wall of the adjusting block (10).

5. According to the new low-temperature hard-sealed full-open safety valve of claim 2, Features: The end of the sealing cylinder (5) close to the valve stem (7) is in a closed configuration, and the end of the sealing cylinder (5) away from the valve stem (7) is in an open configuration.

6. The new low-temperature hard-sealed full-open safety valve according to claim 2, Features: The end of the valve body (1) away from the first flow port (2) is arranged to be open, and the end of the valve body (1) away from the first flow port (2) is detachably connected to a positioning cylinder (11), and the valve stem (7) is slidably arranged on the positioning cylinder (11).

7. The new low-temperature hard-sealed full-open safety valve according to claim 1, Features: The end of the valve body (1) away from the first flow port (2) is detachably connected to a sealing cover (12).

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