Sealing performance detection device for power station valve
By using a hydraulic rod and a motor-driven moving mechanism, stable clamping and fixing of valves of different sizes and shapes is achieved, solving the problem of cumbersome fixture replacement in existing technologies and improving the accuracy and efficiency of valve sealing performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG MULING POWER STATION VALVE CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-15
AI Technical Summary
Existing valve sealing performance testing devices are inefficient when changing fixtures, especially for large or complex valves, where the operation is cumbersome and difficult, affecting testing efficiency.
The moving mechanism uses a hydraulic rod and a motor to drive the fixed block to move up and down. The limit post ensures stability, the clamping block uses spring force to hold the valve, and the motor drives the gear and the double-threaded rack to achieve clamping and fixation. It can adapt to valves of different sizes and shapes and avoid the need to change clamps.
It improves the accuracy and efficiency of valve testing, reduces the time and steps required for fixture replacement, adapts to valves of different dimensions and surface shapes, and ensures testing stability.
Smart Images
Figure CN224247212U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve testing technology, and in particular to a device for testing the sealing performance of power plant valves. Background Technology
[0002] A valve is a mechanical device used to open and close pipelines, control the flow direction, and regulate and control the transported medium. It consists of a valve body, valve cover, valve stem, valve core, and sealing components. It can cut off the flow of fluid in the pipeline, ensure that the fluid in the pipeline flows in a specified direction, and prevent backflow of fluid.
[0003] Valve sealing performance testing devices can accurately test the sealing performance of valves and determine whether they meet quality standards and usage requirements. During the valve production process, each valve is rigorously tested by the testing device to promptly identify products with substandard sealing performance, preventing unqualified products from entering the market and thus ensuring the overall quality of valves.
[0004] Existing valve sealing performance testing devices can accurately measure the leakage of valve sealing surfaces and determine valve sealing performance through high-precision sensors and measuring instruments. However, different valves vary in size, shape, and connection method, and the fixing structure of the testing device lacks sufficient flexibility and versatility. Current technology uses replaceable clamps to achieve stable fixing for different types of valves. However, in actual testing, changing clamps requires a certain amount of time and operational steps. Operators need to first disassemble the currently used clamp, then select a suitable clamp and install and adjust it to ensure that the clamp is correctly connected and clamped to the valve. This process is quite cumbersome, especially for some large or complex valves, where changing clamps is even more difficult and affects testing efficiency. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a sealing performance testing device for power plant valves, aiming to improve the problem of the impact of changing fixtures on testing efficiency in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sealing performance testing device for power plant valves, comprising a body, a baffle fixedly connected to the left side of the top wall of the body, a groove provided in the upper middle part of the rear side of the inner wall of the baffle, a slider slidably connected to the left and right sides of the inner wall of the groove, a hydraulic rod fixedly connected to the front side of the top wall of the slider, a fixing block provided at the upper and lower ends of the left and right sides of the inner wall of the baffle, the upper fixing block being fixedly connected to the output end of the hydraulic rod, a limit post fixedly connected to the front and rear sides of the top wall of the fixing block, the limit post being slidably connected to the front side of the top wall of the slider, multiple square grooves equidistantly provided on adjacent sides of the two fixing blocks, a spring fixedly connected to the side of the inner wall of the multiple square grooves that is far apart, a clamping block fixedly connected to the end of the spring, detectors installed on the left and right sides of the inner wall of the baffle, and a moving mechanism provided on the left side of the inner top wall of the body, the moving mechanism being used to move the fixing blocks.
[0007] As a further description of the above technical solution:
[0008] The moving mechanism includes a fixed frame, which is fixedly connected to the left side of the inner top wall of the machine body. A motor is provided on the right side of the outer wall of the fixed frame. A rotating shaft is fixedly connected to the output end of the motor. The rotating shaft passes through the right side of the outer wall of the fixed frame. A gear is fixedly connected to the end of the rotating shaft. A bidirectional threaded gear is meshed with the top wall of the gear. Threaded blocks are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded gear. The threaded blocks are fixedly connected to the bottom wall of the lower fixed block. Slider II are fixedly connected to the front and rear sides of the outer wall of the threaded blocks. Sliding grooves are provided on the left and right ends of the front and rear sides of the inner wall of the fixed frame. Slider II is slidably connected to the sliding grooves.
[0009] As a further description of the above technical solution:
[0010] A controller is fixedly connected to the right side of the top wall of the machine body, and an alarm light is fixedly connected to the right side of the top wall of the controller.
[0011] As a further description of the above technical solution:
[0012] The bottom wall of the motor is fixedly connected to a bracket, and the left and right ends of the front side of the outer wall of the bracket are threaded with a bolt. The bolt is threaded to the upper middle part of the rear side of the inner wall of the motor body.
[0013] As a further description of the above technical solution:
[0014] Multiple maintenance doors are equidistantly arranged on the front side of the outer wall of the machine body, and a handle is fixedly connected to the front side of the outer wall of each maintenance door.
[0015] As a further description of the above technical solution:
[0016] Multiple hinges are equidistantly installed on the front side of the outer wall of the machine body. Each of the four corners of the front side of the outer wall of the hinges is threaded with two bolts. The machine body is rotatably connected to the maintenance door through the hinges.
[0017] As a further description of the above technical solution:
[0018] The bottom wall of the machine body is fixedly connected to four corners of the rotating shaft, and the end of the rotating shaft is rotatably connected to a roller.
[0019] As a further description of the above technical solution:
[0020] Support feet are fixedly connected to the four corners of the bottom wall of the machine body, and rubber pads are fixedly connected to the ends of the support feet.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, the hydraulic rod drives the fixed block to move up and down, and the limiting column ensures that the fixed block is stable during the movement. The clamping block first contacts the valve surface, and then the fixed block compresses the spring. The spring force ensures that the clamping block firmly clamps the valve. By adjusting the moving distance and force, it can adapt to valves with different shapes and sizes, ensuring valve stability during testing, improving testing accuracy, eliminating the need to change the fixture, and improving work efficiency.
[0023] 2. In this utility model, the output of the motor drives the first rotating shaft and the gear to rotate. The gear drives the bidirectional threaded rack to rotate. The bidirectional threaded rack drives the two threaded blocks to move towards each other. The second slider slides in the second groove to ensure that the threaded blocks move horizontally and prevent shaking. The threaded blocks drive the lower fixed block to move. The distance between the lower fixed block and the upper fixed block is controlled by the motor to achieve clamping and fixing of valves of different lengths. Attached Figure Description
[0024] Figure 1 This is a perspective view of a sealing performance testing device for power plant valves proposed in this utility model;
[0025] Figure 2 This is a front view of a sealing performance testing device for power plant valves proposed in this utility model;
[0026] Figure 3 This is a partial structural diagram of a sealing performance testing device for power plant valves proposed in this utility model;
[0027] Figure 4 This is a partial structural exploded view of a sealing performance testing device for power plant valves proposed in this utility model;
[0028] Figure 5This is a schematic diagram of the moving mechanism of a sealing performance testing device for power plant valves proposed in this utility model.
[0029] Legend:
[0030] 1. Body; 2. Moving mechanism; 201. Fixed frame; 202. Motor; 203. Rotating shaft one; 204. Gear; 205. Bidirectional threaded rack; 206. Threaded block; 207. Slider two; 208. Slide groove two; 3. Baffle; 4. Slide groove one; 5. Slider one; 6. Hydraulic rod; 7. Fixed block; 8. Limiting post; 9. Square groove; 10. Spring; 11. Clamping block; 12. Detector; 13. Controller; 14. Alarm light; 15. Bracket; 16. Bolt one; 17. Inspection door; 18. Handle; 19. Hinge; 20. Bolt two; 21. Rotating shaft two; 22. Roller; 23. Support foot; 24. Rubber pad. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Reference Figure 1 and Figure 4This utility model provides an embodiment of a sealing performance testing device for power station valves, comprising a body 1. A baffle 3 is fixedly connected to the left side of the top wall of the body 1. A groove 4 is provided in the upper middle part of the rear side of the inner wall of the baffle 3. A slider 5 is slidably connected to the left and right sides of the inner wall of the groove 4. The groove 4 is used to slide the slider 5. A hydraulic rod 6 is fixedly connected to the front side of the top wall of the slider 5. Fixing blocks 7 are provided at the upper and lower ends of the left and right sides inside the baffle 3. The upper fixing block 7 is fixedly connected to the output end of the hydraulic rod 6. The hydraulic rod 6 is used to drive the upper fixing block 7 to move. Limiting posts 8 are fixedly connected to the front and rear sides of the top wall of the fixing block 7. The limiting posts 8 play a guiding and stabilizing role. The limiting posts 8 are slidably connected to the front side of the top wall of the slider 5. Multiple square grooves 9 are equidistantly provided on the adjacent sides of the two fixing blocks 7. Springs 10 are fixedly connected to the side of the inner wall of the multiple square grooves 9 that are far apart. The square grooves 9 are used to accommodate the springs 10. A clamping block 11 is fixedly connected to the end of the spring 10. The clamping block 11 can adapt to Valves of different sizes and surface shapes are equipped with detectors 12 on both the left and right sides of the inner wall of the baffle 3. The detectors 12 can capture the leakage points of the valves more comprehensively, avoiding the situation of missing leakage problems due to single-sided detection, and improving the accuracy and reliability of detection. A moving mechanism 2 is set on the left side of the inner top wall of the body 1. The moving mechanism 2 is used to move the fixed block 7. A controller 13 is fixedly connected to the right side of the top wall of the body 1. The controller 13 is used to precisely control the operating status of other key components in the device, ensuring the accuracy and efficiency of the detection work. An alarm light 14 is fixedly connected to the right side of the top wall of the controller 13. The alarm light 14 is used to promptly inform the operator that a problem has occurred during the detection process. Multiple maintenance doors 17 are equidistantly arranged on the front side of the outer wall of the body 1. The maintenance doors 17 facilitate inspection, repair and replacement, greatly improving the efficiency of maintenance work and reducing maintenance costs. A handle 18 is fixedly connected to the front side of the outer wall of the maintenance door 17. The handle 18 facilitates opening the maintenance door 17.
[0033] Specifically, the hydraulic rod 6 is activated, and its output end extends and retracts, driving the upper fixed block 7 to move up and down. The limit post 8 ensures the stable movement of the fixed block 7. When the fixed block 7 contacts the valve, the clamping block 11 first touches the valve surface. As it continues to approach, the spring 10 compresses, generating elastic force to clamp the valve. By controlling the moving distance and clamping force of the fixed block 7, it can be adapted to different valves, ensuring valve stability during testing and improving testing accuracy. A moving mechanism 2 is provided on the left side of the inner top wall of the machine body 1. The moving mechanism 2 is used to move the fixed block 7. The controller 13 is used to precisely regulate the operating status of other key components in the device, ensuring the accuracy and efficiency of the testing work. The alarm light 14 is used to promptly inform the operator of any problems that occur during the testing process. The inspection door 17 facilitates inspection, repair, and replacement, greatly improving the efficiency of maintenance work and reducing maintenance costs. The handle 18 is used for smooth operation of the inspection door 17.
[0034] Reference Figure 1 , Figure 3 and Figure 5 The moving mechanism 2 includes a fixed frame 201, which is fixedly connected to the left side of the inner top wall of the body 1. A motor 202 is installed on the right side of the outer wall of the fixed frame 201. A rotating shaft 203 is fixedly connected to the output end of the motor 202, and the motor 202 drives the rotating shaft 203 to rotate. The rotating shaft 203 passes through the right side of the outer wall of the fixed frame 201. A gear 204 is fixedly connected to the end of the rotating shaft 203, and the rotating shaft 203 drives the gear 204 to rotate. A double-threaded rack 205 is meshed with the top wall of the gear 204, and the gear 204 drives the double-threaded rack 205 to rotate. Threaded blocks 206 are threadedly connected to the left and right sides of the outer wall of the double-threaded rack 205, and the double-threaded rack 205 drives the threaded blocks 206 to move towards each other. The bottom wall of the fixed block 7 is fixedly connected to the threaded block 206. The threaded block 206 drives the fixed block 7 to move. The front and rear sides of the outer wall of the threaded block 206 are fixedly connected to the slider 207. The left and right sides of the front and rear sides of the inner wall of the fixed frame 201 are provided with the sliding groove 208. The slider 207 and the sliding groove 208 are slidably connected, which provides guidance and limit for the movement of the threaded block 206, ensuring that the threaded block 206 can only move horizontally along the direction of the sliding groove 208. The bottom wall of the motor 202 is fixedly connected to the bracket 15. The bracket 15 is used to fix the motor 202. The left and right sides of the front side of the outer wall of the bracket 15 are threadedly connected to the bolt 16. The bolt 16 is threadedly connected to the upper middle part of the rear side of the inner wall of the machine body 1. The bolt 16 is used to fix the bracket 15 inside the machine body 1.
[0035] Specifically, starting the motor 202 causes the output end of the motor 202 to drive the rotating shaft 203 to rotate. The rotating shaft 203 drives the gear 204 to rotate, and the gear 204 drives the upper bidirectional threaded rack 205 to rotate. The rotation of the bidirectional threaded rack 205 causes the two threaded blocks 206 to rotate in opposite directions. Since the sliders 207 on both sides of the threaded block 206 slide in the grooves 208 in the fixed frame 201, the threaded block 206 can only move horizontally along the direction of the grooves 208, avoiding shaking or offset during the movement. The threaded block 206 will drive the lower fixed block 7 to move. By rotating the motor 202, the lower fixed block 7 can be controlled to move closer to or further away from the upper fixed block 7, thereby achieving clamping and fixing of valves of different lengths. The bracket 15 is used to fix the motor 202, and the bolt 16 is used to fix the bracket 15 inside the body 1.
[0036] Reference Figure 1 and Figure 2Multiple hinges 19 are equidistantly installed on the front side of the outer wall of the machine body 1. One of the two leaf plates of each hinge 19 is fixed to the machine body 1, and the other is fixed to the access door 17, allowing the access door 17 to open and close around the pivot of the hinge 19. Bolts 20 are threadedly connected to the four corners of the front side of the outer wall of the hinge 19. The machine body 1 is rotatably connected to the access door 17 via the hinges 19. The bolts 20 are used to securely fix the hinges 19 to the machine body 1 and the access door 17. A pivot 21 is fixedly connected to the four corners of the bottom wall of the machine body 1, and a roller 22 is rotatably connected to the end of the pivot 21. The rotating shaft 21 can bear the weight of the machine body 1 and the internal equipment and evenly transfer it to the roller 22. The roller 22 can greatly improve the mobility of the device and facilitate the detection work in different areas. The four corners of the bottom wall of the machine body 1 are fixedly connected to the support feet 23. The length and structural design of the support feet 23 ensure that the device can remain stable when placed and will not shake or tilt due to uneven ground, providing a stable foundation for the detection work. The ends of the support feet 23 are fixedly connected to the rubber pads 24, which are used to enhance the stability and anti-slip properties of the support.
[0037] Specifically, the two leaf plates of hinge 19 are fixed to the body 1 and the other to the access door 17, allowing the access door 17 to open and close around the pivot of hinge 19. Bolt 20 is used to firmly fix hinge 19 to the body 1 and access door 17. Pivot 21 can bear the weight of the body 1 and internal equipment and evenly transfer it to roller 22. Roller 22 can greatly improve the mobility of the device and facilitate the testing work in different areas. The length and structural design of the support foot 23 ensure that the device can remain stable when placed and will not shake or tilt due to uneven ground, providing a stable foundation for the testing work. Rubber pad 24 is used to enhance the stability and anti-slip properties of the support.
[0038] Working principle: When the hydraulic rod 6 is activated, the extension and retraction of the output end of the hydraulic rod 6 drives the upper fixed block 7 to move up and down. The limiting post 8 restricts the left and right displacement of the fixed block 7, making the fixed block 7 stable during movement. When the fixed block 7 contacts the valve, the clamping block 11 will first contact the valve surface. As the fixed block 7 continues to approach the valve, the spring 10 will be compressed, generating elastic force. The elastic force of the spring 10 makes the clamping block 11 tightly clamp the valve. By controlling the moving distance and clamping force of the fixed block 7, it is possible to ensure that the valve will not shake or shift during the testing process according to the size and shape of the valve being clamped, thereby improving the accuracy of the testing results.
[0039] When motor 202 is started, its output drives shaft 203 to rotate. Shaft 203 drives gear 204 to rotate, which in turn drives the upper bidirectional threaded rack 205 to rotate. The rotation of the bidirectional threaded rack 205 causes the two threaded blocks 206 to rotate in opposite directions. Since the sliders 207 on both sides of the threaded block 206 slide in the grooves 208 within the fixed frame 201, the threaded block 206 can only move horizontally along the direction of the grooves 208, thus avoiding wobbling or offset during movement. The threaded block 206 will drive the lower fixed block 7 to move. By rotating motor 202, the lower fixed block 7 can be controlled to move closer to or further away from the upper fixed block 7, thereby achieving clamping and fixing of valves of different lengths.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for testing the sealing performance of power plant valves, comprising a body (1), characterized in that: A baffle (3) is fixedly connected to the left side of the top wall of the body (1). A groove (4) is provided in the upper middle part of the rear side of the inner wall of the baffle (3). A slider (5) is slidably connected to the left and right sides of the inner wall of the groove (4). A hydraulic rod (6) is fixedly connected to the front side of the top wall of the slider (5). A fixing block (7) is provided at the upper and lower ends of the left and right sides of the inside of the baffle (3). The upper fixing block (7) is fixedly connected to the output end of the hydraulic rod (6). Limiting posts are fixedly connected to the front and rear sides of the top wall of the fixing block (7). 8), the limiting post (8) is slidably connected to the front side of the top wall of the slider (5), and multiple square grooves (9) are equally spaced on the adjacent sides of the two fixed blocks (7). A spring (10) is fixedly connected to the inner wall of the multiple square grooves (9) on the side away from each other. A clamping block (11) is fixedly connected to the end of the spring (10). A detector (12) is installed on the left and right sides of the inner wall of the baffle (3). A moving mechanism (2) is provided on the left side of the inner top wall of the body (1). The moving mechanism (2) is used to move the fixed block (7).
2. The sealing performance testing device for power plant valves according to claim 1, characterized in that: The moving mechanism (2) includes a fixed frame (201), which is fixedly connected to the left side of the inner top wall of the body (1). A motor (202) is provided on the right side of the outer wall of the fixed frame (201). A rotating shaft (203) is fixedly connected to the output end of the motor (202). The rotating shaft (203) passes through the right side of the outer wall of the fixed frame (201). A gear (204) is fixedly connected to the end of the rotating shaft (203). The top wall of the gear (204) is... A bidirectional threaded toothed rod (205) is engaged with the outer wall of the bidirectional threaded toothed rod (205), and threaded blocks (206) are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded toothed rod (205). The threaded blocks (206) are fixedly connected to the bottom wall of the lower fixed block (7). Slider two (207) are fixedly connected to the front and rear sides of the outer wall of the threaded block (206). Sliding groove two (208) is opened on the front and rear sides of the inner wall of the fixed frame (201). The slider two (207) is slidably connected to the sliding groove two (208).
3. The sealing performance testing device for power plant valves according to claim 1, characterized in that: A controller (13) is fixedly connected to the right side of the top wall of the body (1), and an alarm light (14) is fixedly connected to the right side of the top wall of the controller (13).
4. The sealing performance testing device for power plant valves according to claim 2, characterized in that: The bottom wall of the motor (202) is fixedly connected to a bracket (15), and the left and right ends of the front side of the outer wall of the bracket (15) are threaded with bolts (16), which are threaded to the upper middle part of the rear side of the inner wall of the machine body (1).
5. The sealing performance testing device for power plant valves according to claim 1, characterized in that: Multiple maintenance doors (17) are equidistantly arranged on the front side of the outer wall of the body (1), and a handle (18) is fixedly connected to the front side of the outer wall of the maintenance door (17).
6. The sealing performance testing device for power plant valves according to claim 1, characterized in that: Multiple hinges (19) are equidistantly installed on the front side of the outer wall of the machine body (1). Bolts (20) are threadedly connected to the four corners of the front side of the outer wall of the hinges (19). The machine body (1) is rotatably connected to the inspection door (17) through the hinges (19).
7. The sealing performance testing device for power plant valves according to claim 1, characterized in that: The bottom wall of the machine body (1) is fixedly connected to the four corners of the rotating shaft (21), and the end of the rotating shaft (21) is rotatably connected to the roller (22).
8. The sealing performance testing device for power plant valves according to claim 1, characterized in that: The bottom wall of the body (1) is fixedly connected to four corners with support feet (23), and the ends of the support feet (23) are fixedly connected to rubber pads (24).