Nuclear-grade gauge valve
By designing the connecting flange, sealing ring and ventilation groove structure in the nuclear-level instrument valve, the primary and secondary guarantee of sealing is achieved, solving the problem of reduced sealing after long-term use, and ensuring the high sealing and leakage prompt function of the nuclear-level instrument valve.
Patent Information
- Application Number
- CN202421859880.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The sealing of the existing nuclear-level instrument valves decreases after long-term use, resulting in leakage, and the prior art cannot effectively indicate the problem of insufficient sealing.
A nuclear-level instrument valve is designed, including a connecting flange, sealing ring, ventilation groove and accommodating box structure, which promotes the sealing ring to squeeze through the spring force to achieve the initial sealing, and when the sealing property decreases, it prompts leakage through gas entering the ventilation groove and the storage box, and combines the secondary sealing assembly to improve sealing.
It improves the sealing of the instrument valve, avoids leakage, and prompts that there is insufficient sealing, enhancing practicality and functionality.
Smart Images
Figure CN223137084U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of instrument valves, in particular to a nuclear-grade instrument valve. Background Technique
[0002] With the continuous growth of China's demand for clean energy, nuclear power in China has entered a new stage of simultaneous development of safety, independence and replacement of third-generation nuclear power technologies. Nuclear-grade instrument valves are nuclear-grade valves that must be used in the instrument control systems of nuclear power plants.
[0003] When some existing nuclear-grade instrument valves are in use, flanges are usually used to connect the instrument valves and external pipelines. However, after long-term use of the instrument valves, the connection between the flanges may be insufficient in sealing due to reasons such as gasket aging and damage to the flange surface, resulting in leakage. Moreover, the threaded holes on its surface may also be worn after long-term tightening work, causing the bolts to become loose, with low stability, poor sealing and low practicability in actual use. In view of this, we propose a nuclear-grade instrument valve to solve the above problems. Summary of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the utility model provides a nuclear-grade instrument valve, which solves the problem that the sealing performance of some existing nuclear-grade instrument valves decreases after long-term use.
[0005] To achieve the above object, the utility model provides the following technical solution: A nuclear-grade instrument valve includes a nuclear-grade instrument valve body. A connecting pipeline is arranged on the outer surface of the nuclear-grade instrument valve body. A connecting flange is sleeved on the front end outside of the connecting pipeline. Threaded holes are opened inside the connecting flange. A groove is opened on the front side surface of the connecting flange. A moving plate is slidably connected inside the groove. A sealing ring is fixedly connected to the front side surface of the moving plate. The sealing ring extends out of the groove. A second spring is fixedly connected between the inner wall of the groove and the moving plate. An air vent groove is opened inside the connecting flange. The air vent groove is L-shaped. The horizontal groove of the air vent groove is communicated with the groove. The vertical groove of the air vent groove extends out of the connecting flange. A receiving box is fixedly connected to the outer surface of the connecting flange. The inside of the receiving box is hollow and is communicated with the groove through the air vent groove. A sealing plug is slidably connected inside the receiving box. The upper end of the sealing plug extends out of the receiving box. A circular plate is fixedly connected to the lower surface of the sealing plug. A first spring is fixedly connected between the upper surface of the circular plate and the top wall of the receiving box. The first spring is sleeved on the outside of the sealing plug. A secondary sealing assembly is arranged on the outer surface of the connecting pipeline.
[0006] Preferably, the secondary sealing assembly includes a control box, which is fixedly connected to the connecting pipeline. A guiding groove is opened on the side surface of the control box facing the connecting flange.
[0007] Preferably, a bidirectional threaded rod is rotatably connected inside the guide groove, and the bidirectional threaded rod rotatably passes through the control box.
[0008] Preferably, two opposite threads of the bidirectional threaded rod are both threadedly sleeved with L-shaped connecting plates, and the L-shaped connecting plates are slidably connected to the inside of the guide groove.
[0009] Preferably, the outside of the L-shaped connecting plate is fixedly connected to a moving ring, and the outer surface of the moving ring is fixedly connected to an L-shaped fixing plate.
[0010] Preferably, a sealing plate is fixedly connected to the outer surface of the L-shaped fixing plate, and the sealing plate is semi-annular in shape.
[0011] Preferably, the inner diameter of the movable ring is matched with the outer diameter of the connecting pipe, and the inner diameter of the sealing plate is matched with the outer diameter of the connecting flange.
[0012] Preferably, a sealing half ring is provided on the inner wall of the sealing plate.
[0013] Compared with the prior art, the utility model provides a nuclear-grade instrument valve, which has the following beneficial effects:
[0014] 1. The nuclear-grade instrument valve will push the moving plate to move toward the flange side of the external pipeline through the elastic force of the second spring itself, thereby squeezing the sealing ring. If the sealing between the flanges decreases or the sealing ring is worn, the gas in the pipeline will enter the inside of the groove and flow through the ventilation groove into the inside of the containing box, thereby pushing the circular plate and the sealing plug up, and then reminding the staff that the sealing of the connection here is insufficient, thereby improving the sealing of the device during use and avoiding leakage as much as possible. At the same time, when leakage occurs, it is also convenient for the staff to promptly discover the problem of insufficient sealing, further improving the practicability and functionality of the device, and having a high sealing performance.
[0015] 2. The nuclear-grade instrument valve further improves the sealing between flanges by setting up a secondary sealing component. At the same time, the setting of the secondary sealing component also ensures that the gas enters the interior of the groove as much as possible when the sealing between the flanges decreases, thereby giving the staff a reminder through the setting of the sealing plug. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a nuclear-grade instrument valve of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the connecting pipeline of the utility model;
[0018] Figure 3 This is a first schematic diagram of the cross-sectional structure of the connecting flange of the utility model;
[0019] Figure 4 It is the second schematic cross-sectional view of the connecting flange of the present utility model;
[0020] Figure 5 It is the schematic structural view of the control box of the present utility model.
[0021] In the figure: 1. Nuclear-grade instrument valve body; 2. Connecting pipe; 3. Connecting flange; 4. Threaded hole; 5. Groove; 6. Moving plate; 7. Sealing ring; 8. Venting groove; 9. Accommodating box; 10. Sealing plug; 11. Circular plate; 12. First spring; 13. Second spring; 14. Control box; 15. Guide groove; 16. Bidirectional threaded rod; 17. L-shaped connecting plate; 18. Moving ring; 19. L-shaped fixing plate; 20. Sealing plate; 21. Sealing semi-ring. Specific embodiments
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0023] Please refer to Figures 1 - 5The utility model provides a technical solution: a nuclear-grade instrument valve, comprising a nuclear-grade instrument valve body 1, a connecting pipe 2 is arranged on the outer surface of the nuclear-grade instrument valve body 1, a connecting flange 3 is sleeved on the front end of the connecting pipe 2, a threaded hole 4 is provided inside the connecting flange 3, a groove 5 is provided on the front side surface of the connecting flange 3, a moving plate 6 is slidably connected inside the groove 5, a sealing ring 7 is fixedly connected to the front side surface of the moving plate 6, the sealing ring 7 extends out of the groove 5, a second spring 13 is fixedly connected between the inner wall of the groove 5 and the moving plate 6, a venting groove 8 is provided inside the connecting flange 3, the venting groove 8 is L-shaped, and the transverse groove of the venting groove 8 and the groove 5 The vertical groove of the ventilation groove 8 extends out of the connecting flange 3, and the outer surface of the connecting flange 3 is fixedly connected with a receiving box 9. The internal hollow of the receiving box 9 is connected through the ventilation groove 8 and the groove 5. The interior of the receiving box 9 is slidably connected with a sealing plug 10, and the upper end of the sealing plug 10 extends out of the receiving box 9. The lower surface of the sealing plug 10 is fixedly connected with a circular plate 11. A first spring 12 is fixedly connected between the upper surface of the circular plate 11 and the top wall of the receiving box 9. The first spring 12 is sleeved on the outside of the sealing plug 10. A secondary sealing component is provided on the outer surface of the connecting pipe 2. When the staff connects the nuclear-grade instrument valve body 1 to the external pipeline, first, the external pipeline The flange and the connecting flange 3 are fastened by bolts. In this process, the flange of the external pipe will first contact the sealing ring 7 and squeeze the sealing ring 7 into the inside of the groove 5. At this time, the second spring 13 will be deformed. After the connection is completed, the elastic force of the second spring 13 itself will push the moving plate 6 to move toward the flange side of the external pipe, thereby squeezing the sealing ring 7. At this time, the first seal between the flanges is achieved. After long-term use, if the sealing between the flanges decreases or the sealing ring 7 is worn, the gas in the pipeline will enter the inside of the groove 5, and then flow through the groove 5 through the ventilation groove 8 into the containing box 9 Because the air pressure inside the containing box 9 is fixed, when the gas enters the containing box 9 through the vent groove 8, the air pressure inside the containing box 9 will rise, thereby pushing the circular plate 11 and the sealing plug 10 to rise. At this time, the first spring 12 will be deformed, thereby prompting the staff that the sealing of the connection here is insufficient. The staff can then replace the flange or the sealing ring 7. The above structure improves the sealing of the device during use and avoids leakage as much as possible. At the same time, when leakage occurs, it is also convenient for the staff to promptly discover the problem of insufficient sealing, further improving the practicability and functionality of the device, and the sealing is relatively high.
[0024] Furthermore, the secondary sealing assembly includes a control box 14. The control box 14 is fixedly connected to the connecting pipe 2. On one side surface of the control box 14 facing the connecting flange 3, a guiding groove 15 is provided. Inside the guiding groove 15, a bidirectional threaded rod 16 is rotatably connected. The bidirectional threaded rod 16 rotates through the control box 14. On both opposite threaded portions of the bidirectional threaded rod 16, L-shaped connecting plates 17 are threadedly sleeved. The L-shaped connecting plates 17 are slidably connected inside the guiding groove 15. An outer portion of the L-shaped connecting plate 17 is fixedly connected with a moving ring 18. The inner diameter of the moving ring 18 is adapted to the outer diameter of the connecting pipe 2. An outer surface of the moving ring 18 is fixedly connected with an L-shaped fixing plate 19. An outer surface of the L-shaped fixing plate 19 is fixedly connected with a sealing plate 20. The sealing plate 20 is in a semi-circular shape. The inner diameter of the sealing plate 20 is adapted to the outer diameter of the connecting flange 3. A sealing semi-ring 21 is provided on an inner wall of the sealing plate 20. When the staff connects the flange of the external pipe and the connecting flange 3, by rotating the bidirectional threaded rod 16, the two L-shaped connecting plates 17 are driven to slide inside the guiding groove 15, thereby driving the movement of the two moving rings 18. By the movement of the moving rings 18, the movement of the L-shaped fixing plates 19 is driven. By the movement of the L-shaped fixing plates 19, the movement of the sealing plates 20 is driven. Finally, the gap between the flange of the external pipe and the connecting flange 3 is blocked by the sealing plate 20. At this time, the sealing semi-ring 21 will be squeezed by the flange and the sealing plate 20, thereby forming a secondary seal for the connection between the flanges. Through the setting of the secondary sealing assembly, the sealing performance between the flanges is further improved. At the same time, the setting of the secondary sealing assembly also enables as much gas as possible to enter the inside of the groove 5 when the sealing performance between the flanges decreases, so as to give a prompt to the staff through the setting of the sealing plug 10.
[0025] Working principle:
[0026] When this nuclear-grade instrument valve is in use, the flange of the external pipe and the connecting flange 3 are fastened by bolts. In this process, the flange of the external pipe will first contact the sealing ring 7 and squeeze the sealing ring 7 into the inside of the groove 5. At this time, the second spring 13 will deform. After the connection is completed, relying on the elastic force of the second spring 13 itself, the moving plate 6 will be pushed to move towards the flange side of the external pipe, thereby realizing the extrusion of the sealing ring 7. At this time, the first seal between the flanges is achieved. After long-term use, if the sealing performance between the flanges deteriorates or the sealing ring 7 wears, the gas in the pipe will enter the inside of the groove 5, and then flow through the ventilation groove 8 into the inside of the accommodating box 9. Because the air pressure inside the accommodating box 9 is fixed, when the gas enters the inside of the accommodating box 9 through the ventilation groove 8, the air pressure inside the accommodating box 9 will rise, thereby pushing the round plate 11 and the sealing plug 10 to rise. At this time, the first spring 12 will deform, thereby prompting the staff that the sealing performance at this connection is insufficient. Subsequently, the staff can replace the flange or the sealing ring 7.
[0027] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A nuclear-grade instrument valve, comprising a nuclear-grade instrument valve body (1), characterized in that: The outer surface of the nuclear-grade instrument valve body (1) is provided with a connecting pipe (2). A connecting flange (3) is sleeved outside the front end of the connecting pipe (2). Threaded holes (4) are formed inside the connecting flange (3). A groove (5) is formed on the front side surface of the connecting flange (3). A moving plate (6) is slidably connected inside the groove (5). A sealing ring (7) is fixedly connected to the front side surface of the moving plate (6). The sealing ring (7) extends out of the groove (5). A second spring (13) is fixedly connected between the inner wall of the groove (5) and the moving plate (6). An air vent groove (8) is formed inside the connecting flange (3). The air vent groove (8) is L-shaped. The horizontal groove of the air vent groove (8) communicates with the groove (5). The vertical groove of the air vent groove (8) extends out of the connecting flange (3). A receiving box (9) is fixedly connected to the outer surface of the connecting flange (3). The inside of the receiving box (9) is hollow and communicates with the groove (5) through the air vent groove (8). A sealing plug (10) is slidably connected inside the receiving box (9). The upper end of the sealing plug (10) extends out of the receiving box (9). A circular plate (11) is fixedly connected to the lower surface of the sealing plug (10). A first spring (12) is fixedly connected between the upper surface of the circular plate (11) and the top wall of the receiving box (9). The first spring (12) is sleeved outside the sealing plug (10). A secondary sealing assembly is arranged on the outer surface of the connecting pipe (2).
2. The nuclear-grade instrument valve according to claim 1, characterized in that: The secondary sealing assembly includes a control box (14). The control box (14) is fixedly connected to the connecting pipe (2). A guiding groove (15) is formed on one side surface of the control box (14) facing the connecting flange (3).
3. The nuclear-grade instrument valve according to claim 2, wherein: A bidirectional threaded rod (16) is rotatably connected inside the guiding groove (15). The bidirectional threaded rod (16) rotatably penetrates out of the control box (14).
4. The nuclear-grade instrument valve according to claim 3, characterized in that: L-shaped connecting plates (17) are threadedly sleeved on two opposite threaded portions of the bidirectional threaded rod (16). The L-shaped connecting plates (17) are slidably connected inside the guiding groove (15).
5. The nuclear-grade instrument valve according to claim 4, characterized in that: A moving ring (18) is fixedly connected to the outside of the L-shaped connecting plate (17). An L-shaped fixing plate (19) is fixedly connected to the outer surface of the moving ring (18).
6. The nuclear-grade instrument valve according to claim 5, characterized in that: A sealing plate (20) is fixedly connected to the outer surface of the L-shaped fixing plate (19). The shape of the sealing plate (20) is semi-circular.
7. A nuclear-grade instrument valve according to claim 5, characterized in that: The inner diameter of the moving ring (18) is adapted to the outer diameter of the connecting pipe (2). The inner diameter of the sealing plate (20) is adapted to the outer diameter of the connecting flange (3).
8. A nuclear-grade instrument valve according to claim 6, characterized in that: A sealing semi-ring (21) is arranged on the inner wall of the sealing plate (20).