Dome valve sealing performance detection device

Abstract

The utility model belongs to the technical field of dome valve detection, and discloses a dome valve sealing performance detection device which comprises a rack, an upper mounting seat, a lower mounting seat, a lifting seat, a driving assembly, a lower opening, a placement groove and a storage hopper, an upper opening is formed in the upper mounting seat, an annular seat is arranged at the position, located at the upper opening, of the bottom of the upper mounting seat, and a feeding hopper is arranged at the top of the upper mounting seat; an auger conveyor is vertically arranged on the rack, the feeding end of the auger conveyor is connected with the bottom of the storage hopper, an inclined pipe is arranged at the discharging end of the auger conveyor, and one end of the inclined pipe is located over the feeding hopper. And the auger conveyor is used for upwards conveying the test particles in the storage hopper. The test particles sequentially pass through the upper opening, the annular seat, the dome valve and the lower opening and finally flow back to the storage hopper. And then the dome valve is closed, and whether the test particles continuously fall from the lower opening or not is observed, so that the sealing performance of the dome valve is judged. The sealing performance of the dome valve is evaluated by simulating the actual working condition, and the accuracy of the detection result is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of dome valve testing technology, and in particular to a dome valve sealing performance testing device. Background Technology

[0002] Dome valves are used in industries such as non-ferrous metals, petrochemicals, and mining. When handling abrasive materials, the expandable pressure sealing ring embedded in the dome valve seat ensures a pressure difference across the valve. The elastic expandable sealing ring can trap material particles, preventing them from sliding due to pressure differential and thus avoiding wear on the valve seat and sealing ring. Abrasive materials include slurries, bulk powders, and granules.

[0003] Currently, the conventional method for testing the sealing performance of dome valves mainly involves determining their sealing performance by testing whether a gas or liquid can pass through the closed valve. However, this testing method differs from the actual application scenarios of dome valves. In practical applications, dome valves are primarily used to seal powders or granular materials, which exert a compressive force on the valve's expandable pressure seal. Testing with gas or liquid cannot simulate the actual compression of the seal by the material, making it difficult to accurately assess the true sealing performance of the dome valve under material compression conditions, resulting in significant limitations in the test results. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a device for testing the sealing performance of dome valves.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a dome valve sealing performance testing device, comprising a frame, an upper mounting seat and a lower mounting seat vertically spaced on the frame, a lifting seat vertically slidably mounted on the lower mounting seat, a driving component for driving the lifting seat to rise and fall on the lower mounting seat, a lower opening on the lifting seat, a placement groove on the lifting seat, a storage hopper on the lower mounting seat located below the lifting seat, an upper opening on the upper mounting seat, an annular seat at the bottom of the upper mounting seat located at the upper opening, and a feeding hopper at the top of the upper mounting seat, a screw conveyor vertically mounted on the frame, the feeding end of the screw conveyor connected to the bottom of the storage hopper, and an inclined tube at the discharge end, one end of the inclined tube located directly above the feeding hopper.

[0006] By adopting the above technical solution, an upper mounting base, a lower mounting base, a drive assembly, an annular seat, and an auger conveyor are set up, and test particles are stored in the storage hopper. This dome valve sealing performance testing device evaluates the sealing performance of the dome valve by simulating actual working conditions. During testing, the dome valve is first placed on the lifting base, with its bottom engaging with the placement slot. Then, the lifting base is driven upward by the drive assembly, causing the top of the dome valve to contact the bottom of the annular seat, clamping the dome valve. Subsequently, the test particles in the storage hopper are conveyed upward through the auger conveyor into the inclined tube, and then fall into the feed hopper. The test particles then sequentially pass through the upper opening, the annular seat, the dome valve, and the lower opening, finally flowing back to the storage hopper to form a cycle. After the particle flow stabilizes, the dome valve is closed, and it is observed whether test particles continue to fall from the lower opening, thus determining the sealing performance of the dome valve. This method of testing with real particulate material can accurately simulate the actual compression conditions of the material on the sealing ring, thereby more realistically reflecting the sealing performance of the dome valve under operating conditions and significantly improving the accuracy of the test results.

[0007] Furthermore, two support units are symmetrically arranged on the lower mounting base. Each support unit includes two spaced-apart slides and a connecting plate connecting the tops of the two slides. A slider is slidably arranged in the slide, and a lifting plate is commonly arranged on the four sliders. The lifting seat is arranged on the lifting plate.

[0008] By adopting the above technical solution and setting up slides and sliders, the stability of the lifting platform's lifting is ensured.

[0009] Furthermore, the lifting plate has four vertically arranged rectangular sliding holes, and a sliding rod is slidably installed in the sliding holes. The upper ends of the four sliding rods are all connected to the bottom of the lifting seat, and the lower ends of the sliding rods are located below the lifting plate and are provided with limit plates. A compression spring is sleeved on the rod body between the lifting seat and the lifting plate.

[0010] By adopting the above technical solution, a sliding rod, a limiting plate, and a compression spring are set up. The lifting plate rises, driving the lifting seat to rise until the top of the dome valve on the lifting seat contacts the annular seat. Then, the lifting plate continues to rise a certain distance, which compresses the compression spring. The compression spring provides a stable thrust, ensuring the stability of the clamping of the dome valve by the lifting seat and the annular seat.

[0011] Furthermore, the drive assembly includes two threaded rods, which are vertically rotatably disposed between the corresponding connecting plate and the lower mounting base. Connecting seats are provided on both sides of the lifting plate, and the connecting seats are helically connected to the corresponding threaded rods through threaded holes. The lower end of the threaded rod passes through the lower mounting base and is provided with a sprocket. The two sprockets are connected by a chain. A fixed base is provided at the bottom of the lower mounting base, and a drive motor is vertically disposed on the fixed base. The output shaft of the drive motor is connected to the lower end of one of the threaded rods.

[0012] By adopting the above technical solution, a threaded rod, a connecting seat, a sprocket, a chain, a fixed seat, and a drive motor are set up. The sprocket and chain ensure that the two threaded rods rotate synchronously. The drive motor drives the threaded rods to rotate, thereby driving the connecting seat and the lifting plate to rise and fall.

[0013] Furthermore, the lifting plate has a passage opening in the middle, and the bottom of the lifting seat is provided with a guide tube that passes through the passage opening.

[0014] Furthermore, the end of the inclined tube furthest from the auger conveyor is lower than the end connected to the discharge end of the auger conveyor.

[0015] Furthermore, the upper mounting base has an opening on the side away from the auger conveyor, the feed hopper has an opening on the side away from the auger conveyor, and a baffle is provided at the opening of the feed hopper.

[0016] By adopting the above technical solutions, setting up clearances, openings, and barriers, obstructions are reduced and the operating space for staff is increased.

[0017] In summary, this utility model has the following beneficial effects: This application includes an upper mounting base, a lower mounting base, a drive assembly, an annular seat, and an auger conveyor. Test particles are stored in the storage hopper. This dome valve sealing performance testing device evaluates the sealing performance of the dome valve by simulating actual working conditions. During testing, the dome valve is first placed on the lifting base, with its bottom engaging with the placement groove. Then, the drive assembly drives the lifting base upwards, causing the top of the dome valve to contact the bottom of the annular seat, clamping the dome valve. Subsequently, the auger conveyor transports the test particles from the storage hopper upwards into the inclined tube, and then into the feed hopper. The test particles then sequentially pass through the upper opening, the annular seat, the dome valve, and the lower opening, finally flowing back to the storage hopper to form a cycle. After the particle flow stabilizes, the dome valve is closed, and it is observed whether any test particles continue to fall from the lower opening, thus determining the sealing performance of the dome valve. This method of testing with real particulate materials can accurately simulate the actual compression conditions of materials on the sealing ring, thus more realistically reflecting the sealing performance of the dome valve under operating conditions and greatly improving the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the mounting base and feed hopper in an embodiment of this utility model;

[0021] Figure 4 This is a structural schematic diagram of the mounting base and lifting base according to an embodiment of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the lifting plate and lifting seat according to an embodiment of the present utility model.

[0023] In the diagram: 10. Frame; 20. Upper mounting base; 21. Upper opening; 22. Annular seat; 23. Feed hopper; 24. Clearance opening; 25. Notch; 26. Baffle; 30. Lower mounting base; 31. Lifting seat; 32. Lower opening; 33. Placement slot; 34. Storage hopper; 35. Support unit; 351. Slide rail; 352. Connecting plate; 353. Slider; 36. Lifting plate; 361. Slide rod; 362. Limiting plate; 363. Compression spring; 364. Through port; 37. Guide tube; 40. Drive assembly; 41. Threaded rod; 42. Sprocket; 43. Chain; 44. Fixed seat; 45. Drive motor; 46. Connecting seat; 50. Screw conveyor; 51. Inclined tube. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figure 1-5As shown in the figure, this application discloses a dome valve sealing performance testing device, including a frame 10, a drive assembly 40, an annular seat 22, and an auger conveyor 50. An upper mounting seat 20 and a lower mounting seat 30 are vertically spaced on the frame 10. A lifting seat 31 is vertically slidably mounted on the lower mounting seat 30. The drive assembly 40 is mounted on the lower mounting seat 30 and is used to drive the lifting seat 31 to rise and fall. The lifting seat 31 has a lower opening 32 and a placement groove 33 for engaging with the bottom of the dome valve. A storage hopper 34 is located below the lifting seat 31 on the lower mounting seat 30, storing test particles, which can be plastic particles. An upper opening 21 is located on the upper mounting seat 20. Both the upper opening 21 and the lower opening 32 are circular and concentric. An annular seat 22 is located at the bottom of the upper mounting seat 20 at the upper opening 21, and a feed hopper 23 is located at the top. The auger conveyor 50 is vertically mounted on the frame 10. The feed end of the auger conveyor 50 is connected to the bottom of the storage hopper 34, and the discharge end is equipped with an inclined pipe 51, one end of which is located directly above the feed hopper 23. During testing, the dome valve is first placed on the lifting seat 31, its bottom engaging with the placement groove 33. Then, the lifting seat 31 is driven upwards by the drive assembly 40, causing the top of the dome valve to contact the bottom of the annular seat 22, clamping the dome valve. The auger conveyor 50 then transports the test particles from the storage hopper 34 upwards into the inclined pipe 51, and then they fall into the feed hopper 23. The test particles then sequentially pass through the upper opening 21, the annular seat 22, the dome valve, and the lower opening 32, finally flowing back to the storage hopper 34 to form a cycle. After the particle flow stabilizes, the dome valve is closed, and it is observed whether any test particles continue to fall from the lower opening 32, thus determining the sealing performance of the dome valve. This method of testing with real particulate materials can accurately simulate the actual compression conditions of materials on the sealing ring, thus more realistically reflecting the sealing performance of the dome valve under operating conditions and greatly improving the accuracy of the test results.

[0026] Specifically, two support units 35 are symmetrically arranged on the lower mounting base 30. Each support unit 35 includes two spaced-apart sliding grooves 351 and a connecting plate 352 connecting the tops of the two sliding grooves 351. Sliding blocks 353 are slidably arranged in the sliding grooves 351. A lifting plate 36 is commonly arranged on the four sliding blocks 353. A lifting seat 31 is placed on the lifting plate 36 to ensure the stability of the lifting plate 36. The lifting plate 36 has four vertically arranged sliding holes in a rectangular array. Sliding rods 361 are slidably arranged in the sliding holes. The upper ends of the four sliding rods 361 are connected to the bottom of the lifting seat 31. The lower ends of the sliding rods 361 are located below the lifting plate 36 and are provided with a limit plate 362. A compression spring 363 is sleeved on the rod of the sliding rod 361 located between the lifting seat 31 and the lifting plate 36. The upper end of the compression spring 363 is connected to the lifting seat 31 and the lower end is connected to the lifting plate 36. The lifting plate 36 rises, causing the lifting seat 31 to rise until the top of the dome valve on the lifting seat 31 contacts the annular seat 22. The lifting plate 36 continues to rise a certain distance, which compresses the compression spring 363. The compression spring 363 provides a stable thrust to ensure the stability of the clamping of the dome valve by the lifting seat 31 and the annular seat 22.

[0027] In configuration, the drive assembly 40 includes two threaded rods 41, which are vertically rotatably positioned between the corresponding connecting plate 352 and the lower mounting base 30. Connecting seats 46 are provided on both sides of the lifting plate 36, and these seats are helically connected to the corresponding threaded rods 41 via threaded holes. The lower ends of the threaded rods 41 pass through the lower mounting base 30 and are fitted with sprockets 42. The two sprockets 42 are connected by a chain 43, which ensures the synchronous rotation of the two threaded rods 41, thereby guaranteeing the stability of the lifting plate 36. A fixed base 44 is provided at the bottom of the lower mounting base 30, and a drive motor 45 is vertically mounted on the fixed base 44. The output shaft of the drive motor 45 is connected to the lower end of one of the threaded rods 41, driving the threaded rod 41 to rotate, thereby causing the connecting base 46 and the lifting plate 36 to rise and fall.

[0028] In the specific setup, a passageway 364 is provided in the middle of the lifting plate 36, and a guide tube 37 is provided at the bottom of the lifting seat 31. The passageway 364 is used for the guide tube 37 to pass through. The guide tube 37 guides the test particles passing through the lower opening 32, ensuring that the test particles can fall into the storage hopper 34. The end of the inclined tube 51 away from the auger conveyor 50 is lower than the end connected to the discharge end of the auger conveyor 50, ensuring that the test particles in the inclined tube 51 can slide into the feed hopper 23. An avoidance opening 24 is provided on the side of the upper mounting base 20 away from the auger conveyor 50, and a notch 25 is provided on the side of the feed hopper 23 away from the auger conveyor 50. A baffle 26 is provided at the notch 25 of the feed hopper 23. This reduces obstruction and increases the operating space for the operator.

[0029] The operating principle of the dome valve sealing performance testing device in this embodiment is as follows: During testing, the dome valve is first placed on the lifting seat 31, with its bottom engaging with the placement groove 33. Then, the drive motor 45 is started to drive the threaded rod 41 and sprocket 42 to rotate, causing the connecting seat 46 and lifting plate 36 to rise, so that the top of the dome valve contacts the bottom of the annular seat 22, and the dome valve is clamped. Subsequently, the auger conveyor 50 is started to transport the test particles in the storage hopper 34 upward to the inclined pipe 51, and then fall into the feed hopper 23. The test particles then pass through the upper opening 21, the annular seat 22, the dome valve, the lower opening 32, and the guide pipe 37 in sequence, and finally flow back to the storage hopper 34 to form a cycle. After the particle flow stabilizes, the dome valve is closed, and it is observed whether any test particles continue to fall from the guide pipe 37, thereby judging the sealing performance of the dome valve. Evaluating the sealing performance of the dome valve by simulating actual working conditions is more accurate.

[0030] After the test is completed, shut down the auger conveyor 50 and then open the dome valve, allowing all the test particles in the feed hopper 23 to fall back into the storage hopper 34 through the upper opening 21, the annular seat 22, the dome valve, the lower opening 32, and the guide pipe 37. Then, drive the drive motor 45 to drive the connecting seat 46 and the lifting plate 36 to descend, so that the dome valve can be removed from the lifting seat 31.

[0031] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for testing the sealing performance of a dome valve, characterized in that: Includes a frame (10), on which an upper mounting base (20) and a lower mounting base (30) are vertically spaced. A lifting seat (31) is vertically slidably mounted on the lower mounting base (30). A drive assembly (40) for driving the lifting seat (31) to rise and fall is also provided on the lower mounting base (30). The lifting seat (31) has a lower opening (32) and a placement slot (33). The lower mounting base (30) is located below the lifting seat (31). The frame (10) is provided with a storage hopper (34), and the upper mounting base (20) is provided with an upper opening (21). The bottom of the upper mounting base (20) is provided with an annular seat (22) at the upper opening (21), and the top is provided with a feeding hopper (23). The frame (10) is provided with a vertical auger conveyor (50). The feeding end of the auger conveyor (50) is connected to the bottom of the storage hopper (34), and the discharge end is provided with an inclined tube (51). One end of the inclined tube (51) is located directly above the feeding hopper (23).

2. The dome valve sealing performance testing device according to claim 1, characterized in that: Two support units (35) are symmetrically arranged on the lower mounting base (30). Each support unit (35) includes two spaced-apart slides (351) and a connecting plate (352) connecting the tops of the two slides (351). A slider (353) is slidably arranged in the slide (351). A lifting plate (36) is provided on all four sliders (353). The lifting seat (31) is arranged on the lifting plate (36).

3. The dome valve sealing performance testing device according to claim 2, characterized in that: The lifting plate (36) has four vertically arranged rectangular sliding holes. Sliding rods (361) are slidably installed in the sliding holes. The upper ends of the four sliding rods (361) are connected to the bottom of the lifting seat (31). The lower ends of the sliding rods (361) are located below the lifting plate (36) and are provided with limit plates (362). Compression springs (363) are sleeved on the rods of the sliding rods (361) located between the lifting seat (31) and the lifting plate (36).

4. The dome valve sealing performance testing device according to claim 3, characterized in that: The drive assembly (40) includes two threaded rods (41), which are vertically rotatably disposed between the corresponding connecting plate (352) and the lower mounting base (30). The lifting plate (36) is provided with connecting seats (46) on both sides. The connecting seats (46) are helically connected to the corresponding threaded rods (41) through threaded holes. The lower end of the threaded rod (41) passes through the lower mounting base (30) and is provided with a sprocket (42). The two sprockets (42) are connected by a chain (43). The bottom of the lower mounting base (30) is provided with a fixed base (44). A drive motor (45) is vertically disposed on the fixed base (44). The output shaft of the drive motor (45) is connected to the lower end of one of the threaded rods (41).

5. The dome valve sealing performance testing device according to claim 2, characterized in that: The lifting plate (36) has a passage opening (364) in the middle, and the lifting seat (31) has a guide tube (37) at the bottom, which passes through the passage opening (364).

6. The dome valve sealing performance testing device according to claim 1, characterized in that: The end of the inclined tube (51) away from the auger conveyor (50) is lower than the end connected to the discharge end of the auger conveyor (50).

7. The dome valve sealing performance testing device according to claim 1, characterized in that: The upper mounting base (20) has an opening (24) on the side away from the auger conveyor (50), and the feed hopper (23) has an opening (25) on the side away from the auger conveyor (50). A baffle (26) is provided at the opening (25) of the feed hopper (23).

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