Air tightness tester for alumina ceramic sealing element

Abstract

The invention discloses an air tightness detector for an alumina ceramic sealing element, and relates to the technical field of air tightness detectors. A display screen is arranged on the outer box body, first mounting plates are connected to the two sides of the outer box body, an air blower is connected to each first mounting plate, an air outlet pipe opening of each air blower is formed in the outer box body, a first top cover is connected to the top of the outer box body, and screws are connected between the first top cover and the outer box body. An air outlet mechanism is arranged on the first top cover. The interior of the outer box body is blown through the air blower, so that air is outwards blown through the air outlet in the first top cover, internal water vapor is evaporated, meanwhile, the temperature is adjusted, after adjustment is completed, a handle on a baffle is pulled, the air outlet is closed, and by adjusting the temperature, it can be ensured that a test result is not affected by temperature and humidity changes; therefore, the test accuracy is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of airtightness detectors, and in particular to an airtightness inspection instrument for an alumina ceramic seal. Background Art

[0002] An air tightness tester for alumina ceramic seals usually uses some of the above-mentioned methods to detect the air tightness of ceramic seals. Alumina ceramics are often used as seal materials due to their excellent physical and chemical properties, such as high strength, high hardness, good wear resistance and corrosion resistance. When conducting air tightness inspections on alumina ceramic seals, factors such as operating environment, temperature, humidity, etc. must also be considered to ensure the accuracy of the test results. At the same time, different testing technologies may need to be used according to different application requirements and test standards;

[0003] The existing method for checking the air tightness of ceramics is mainly the pressure difference method: by applying internal pressure on the ceramic workpiece, and then using a pressure sensor to monitor the change in gas pressure. If there is a leak, the gas pressure will drop, and by comparing the pressure change with the set leakage standard, the air tightness of the ceramic workpiece can be judged;

[0004] The shortcomings of the above scheme are: since changes in environmental factors such as temperature and humidity during detection may affect the diffusion rate of the gas and the performance of the pressure sensor, which may affect the accuracy of the test results, and the existing detection equipment generally does not have a control group when performing airtightness testing. The control group can help confirm whether there is a false negative result in the test process, that is, there is actually a leak in the ceramic sample. If a control group is not set in the ceramic airtightness inspection, unqualified products may be mistakenly judged as qualified, which may affect the technical issues of product quality. Summary of the invention

[0005] The purpose of the present invention is to provide an airtightness tester for alumina ceramic seals to solve the technical problem in the prior art that changes in environmental factors such as temperature and humidity during detection may affect the diffusion rate of the gas and the performance of the pressure sensor, which may affect the accuracy of the test results, and that the existing testing equipment generally does not have a control group when performing airtightness testing, which may cause unqualified products to be mistakenly judged as qualified, which may affect the quality of the product.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] An air tightness tester for an alumina ceramic seal comprises an outer box;

[0008] The outer box body is provided with a display screen, both sides of the outer box body are connected with mounting plates 1, each mounting plate 1 is connected with a blower, the air outlet of the blower is arranged inside the outer box body, the top of the outer box body is connected with a top cover 1, screws are connected between the top cover 1 and the outer box body, and the top cover 1 is provided with an air outlet mechanism;

[0009] The bottom of the outer box is provided with a placement plate, two detection cylinders are placed on the placement plate, the bottom of each detection cylinder is connected to an exhaust pipe, one end of the exhaust pipe away from the detection cylinder is connected to a pressure pump, the outer box is connected to a second mounting plate, the pressure pump is connected to the second mounting plate, and each detection cylinder is provided with a limit mechanism inside;

[0010] The limiting mechanism is connected to two clamping mechanisms; the inner wall of each detection cylinder is connected to a pressure sensor, and the pressure sensor is connected to the display screen by signal; the top of the detection cylinder is connected to a top cover 2, the top cover 2 is connected to a handle 2, the outer periphery of the detection cylinder is connected to a silicone pad, and a connection mechanism is connected between the top cover 2 and the detection cylinder.

[0011] As a further solution of the present invention: the top cover 1 is connected to two handles 1.

[0012] As a further solution of the present invention: the air outlet mechanism includes a plurality of air outlets, and the plurality of air outlets are all arranged on the top cover, and each of the air outlets is pull-out connected to a baffle, and the baffle is connected to a handle.

[0013] As a further solution of the present invention: the limiting mechanism includes a base pad and two limiting plates 1, the base pad is arranged inside the detection cylinder body, the base pad is provided with a slide groove, the two limiting plates 1 are both arranged on the base pad, the bottoms of the two limiting plates 1 are connected with connecting blocks 2, the end of the connecting block 2 away from the limiting plate 1 is connected with a slider, and the slider is arranged in coordination with the slide groove.

[0014] As a further solution of the present invention: the two limit plates are both arc-shaped structures.

[0015] As a further solution of the present invention: an adjustment mechanism is connected between the two limit plates 1, and the adjustment mechanism includes two double-headed screws, both of which are connected to the two limit plates 1, the double-headed screw is connected to a connecting block 1 connected between the limit plates 1, a nut 1 is connected to the double-headed screw, and both ends of the double-headed screw are connected to a handle.

[0016] As a further solution of the present invention: each of the clamping mechanisms includes a limit plate 2 and a nut 2, the nut 2 is connected to the limit plate 1, an adjusting screw is rotatably connected inside the nut 2, and the limit plate 2 is connected to the adjusting screw.

[0017] As a further solution of the present invention: the two limit plates 2 are both arc-shaped structures.

[0018] As a further solution of the present invention: an end of the adjusting screw away from the second limiting plate is connected with an adjusting handle.

[0019] As a further solution of the present invention: the connection mechanism includes two connecting rods 1 and two connecting rods 2, the two connecting rods 1 are respectively connected to the two sides of the top cover 2, the two connecting rods 2 are respectively connected to the two sides of the detection cylinder body, and a connecting bolt is connected between each connecting rod 1 and connecting rod 2.

[0020] Beneficial effects of the present invention:

[0021] 1. Since the mechanical strength and toughness of alumina ceramics may change with temperature, thermal expansion and contraction may cause deformation of the seal, affecting its sealing effect and durability. Therefore, a blower is used to blow air into the outer box so that the wind blows out through the air outlet on the top cover, evaporates the internal water vapor and adjusts the temperature at the same time. After the adjustment is completed, pull the handle on the baffle to close the air outlet. By adjusting the temperature, it can be ensured that the test results are not affected by changes in temperature and humidity, thereby ensuring the accuracy of the test.

[0022] 2. The present invention adjusts the distance between the two limit plates 1 by rotating nut 1, so that the double-headed screw drives the two connecting blocks 1 to move to both ends, and the limit plate 1 drives the slider to move in the slide groove, so that the distance between the two limit plates 1 increases or decreases, and the ceramic workpiece is clamped, and then the limit plate 2 is driven to move by rotating the adjusting screw, so that the limit plate 2 fixes the ceramic workpiece for a second time.

[0023] 3. The present invention helps ensure the accuracy of the test results by comparing the test results in two comparative test cylinders, using two ceramic parts as comparisons. If the two ceramic parts show the same air tightness under the same test conditions, then the test results are considered reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle;

[0028] Figure 4 It is a schematic diagram of the top view structure of the detection cylinder body in the present invention;

[0029] Figure 5 It is a schematic diagram of a top cover structure in the present invention.

[0030] In the figure: 1. outer box; 2. display screen; 3. mounting plate 1; 4. blower; 5. top cover 1; 6. handle 1; 7. screw; 8. placement plate; 9. detection cylinder; 10. top cover 2; 11. slideway; 12. pressure sensor; 13. connecting rod 1; 14. connecting bolt; 15. connecting rod 2; 16. exhaust pipe; 17. pressure pump; 18. mounting plate 2; 19. air outlet; 20. baffle; 21. silicone pad; 22. limit plate 1; 23. double-headed screw; 24. nut 1; 25. connecting block 1; 26. limit plate 2; 27. bottom pad; 28. nut 2; 29. ​​slider; 30. connecting block 2; 31. adjusting screw; 32. handle 2. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 5 As shown, an air tightness tester for an alumina ceramic seal comprises an outer box body 1, a display screen 2 is provided on the outer box body 1, mounting plates 3 are connected to both sides of the outer box body 1, each mounting plate 3 is connected to a blower 4, an air outlet of the blower 4 is arranged inside the outer box body 1, a top cover 5 is connected to the top of the outer box body 1, two handles 6 are connected to the top cover 5, screws 7 are connected between the top cover 5 and the outer box body 1, and an air outlet mechanism is provided on the top cover 5;

[0033] The air outlet mechanism includes a plurality of air outlets 19, and the plurality of air outlets 19 are all arranged on the top cover 5, and each of the air outlets 19 is connected to a baffle 20 by pulling, and the baffle 20 is connected to a handle;

[0034] A placement plate 8 is provided at the bottom of the outer box 1, and two detection cylinders 9 are placed on the placement plate 8. An exhaust pipe 16 is connected to the bottom of each detection cylinder 9, and a pressure pump 17 is connected to the end of the exhaust pipe 16 away from the detection cylinder 9. A second mounting plate 18 is connected to the outer box 1, and the pressure pump 17 is connected to the second mounting plate 18. A limiting mechanism is provided inside each detection cylinder 9;

[0035] The limiting mechanism includes a bottom pad 27 and two limiting plates 22, the bottom pad 27 is arranged inside the detection cylinder body 9, the bottom pad 27 is provided with a slide groove 11, the two limiting plates 22 are both arranged on the bottom pad 27, the two limiting plates 22 are both arc-shaped structures, the bottoms of the two limiting plates 22 are connected with connecting blocks 20, the end of the connecting block 20 away from the limiting plate 22 is connected with a slider 29, the slider 29 is arranged in cooperation with the slide groove 11, an adjustment mechanism is connected between the two limiting plates 22, the adjustment mechanism includes two double-headed screws 23, the two double-headed screws 23 are connected to the two limiting plates 22, the double-headed screws 23 are connected with a connecting block 25 connected between the limiting plates 22, the double-headed screws 23 are connected with a nut 24, and the two ends of the double-headed screws 23 are connected with handles;

[0036] The limiting mechanism is connected to two clamping mechanisms, each of which includes a limiting plate 26 and a nut 28. The nut 28 is connected to the limiting plate 1 22. An adjusting screw 31 is rotatably connected inside the nut 28. The limiting plate 26 is connected to the adjusting screw 31. Both limiting plates 26 are arc-shaped structures. An adjusting handle is connected to one end of the adjusting screw 31 away from the limiting plate 26.

[0037] A pressure sensor 12 is connected to the inner wall of each detection cylinder 9, and a signal connection is made between the pressure sensor 12 and the display screen 2; a top cover 10 is connected to the top of the detection cylinder 9, and a handle 32 is connected to the top cover 10; a silicone pad 21 is connected to the outer periphery of the detection cylinder 9, and a connection mechanism is connected between the top cover 10 and the detection cylinder 9;

[0038] The connection mechanism includes two connecting rods 13 and two connecting rods 15. The two connecting rods 13 are respectively connected to the two sides of the top cover 10, and the two connecting rods 15 are respectively connected to the two sides of the detection cylinder 9. A connecting bolt 14 is connected between each connecting rod 13 and connecting rod 2 15.

[0039] Working principle of the present invention: When using the device, pull the two handles 6 to open the top cover 5, place the workpieces to be tested in the two test cylinders 9 respectively, and close the top cover 5. Since the mechanical strength and toughness of alumina ceramics may change with the change of temperature, thermal expansion and contraction may cause deformation of the seal, affecting its sealing effect and durability. Therefore, the blower 4 is used to blow air into the outer box 1, so that the wind blows out through the air outlet 19 on the top cover 5, evaporates the internal water vapor and adjusts the temperature at the same time. After the adjustment is completed, pull the handle on the baffle 20 to close the air outlet 19, and then adjust the distance between the two limit plates 22. By rotating the nut 24, the double-headed screw 23 drives the two connecting blocks 25 to move to both ends, and the limit plate 22 drives the slider 29 to move in the slide groove 11, so that the distance between the two limit plates 22 Increase or decrease, clamp the ceramic workpiece, and then drive the limit plate 26 to move by rotating the adjusting screw 31, so that the limit plate 26 fixes the ceramic workpiece for the second time, cover the top cover 10 on the detection cylinder 9, and form a sealed space between the top cover 10 and the detection cylinder 9 through the silicone pad 21 on the periphery of the detection cylinder 9, tighten the connecting bolts 14 between the connecting rod 13 and the connecting rod 2 15, so that the top cover 10 and the detection cylinder 9 are sealed, and air is pumped through the pressure pump 17, and a certain pressure of gas is introduced into the detection cylinder 9 through the exhaust pipe 16, and the pressure sensor 12 is used to monitor the change of gas pressure, and the air pressure change is displayed on the display screen 2. There is no significant change in pressure within the specified time, indicating that the air tightness of the alumina ceramic seal is good; if there is a significant change, it indicates that there is a leak, thereby judging whether the system is leaking and the extent of the leak.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An airtightness tester for an alumina ceramic seal, comprising an outer box (1); characterized in that: The outer box (1) is provided with a display screen (2), both sides of the outer box (1) are connected with mounting plates (3), each mounting plate (3) is connected with a blower (4), an air outlet of the blower (4) is arranged inside the outer box (1), a top cover (5) is connected to the top of the outer box (1), screws (7) are connected between the top cover (5) and the outer box (1), and an air outlet mechanism is provided on the top cover (5); The outer box (1) is provided with a placement plate (8) at the bottom, two detection cylinders (9) are placed on the placement plate (8), the bottom of each detection cylinder (9) is connected to an exhaust pipe (16), one end of the exhaust pipe (16) away from the detection cylinder (9) is connected to a pressure pump (17), the outer box (1) is connected to a second mounting plate (18), the pressure pump (17) is connected to the second mounting plate (18), and each detection cylinder (9) is provided with a limiting mechanism inside; The limiting mechanism is connected to two clamping mechanisms; the inner wall of each detection cylinder (9) is connected to a pressure sensor (12), and the pressure sensor (12) is connected to the display screen (2) by signal; the top of the detection cylinder (9) is connected to a second top cover (10), and the second top cover (10) is connected to a second handle (32); the outer periphery of the detection cylinder (9) is connected to a silicone pad (21), and a connection mechanism is connected between the second top cover (10) and the detection cylinder (9).

2. The airtightness tester for alumina ceramic seals according to claim 1, characterized in that: The top cover (5) is connected to two handles (6).

3. The airtightness tester for alumina ceramic seals according to claim 1, characterized in that: The air outlet mechanism comprises a plurality of air outlets (19), and the plurality of air outlets (19) are all arranged on the top cover (5). Each of the air outlets (19) is connected to a baffle (20) by being drawable, and the baffle (20) is connected to a handle.

4. The airtightness tester for alumina ceramic seals according to claim 1, characterized in that: The limiting mechanism comprises a bottom pad (27) and two limiting plates (22); the bottom pad (27) is arranged inside the detection cylinder (9); a slide groove (11) is arranged on the bottom pad (27); the two limiting plates (22) are arranged on the bottom pad (27); a connecting block (30) is connected to the bottom of the two limiting plates (22); a sliding block (29) is connected to one end of the connecting block (30) away from the limiting plate (22); and the sliding block (29) is arranged in cooperation with the slide groove (11).

5. The airtightness tester for alumina ceramic seals according to claim 4, characterized in that: The two limit plates (22) are both arc-shaped structures.

6. The airtightness tester for alumina ceramic seals according to claim 4, characterized in that: An adjustment mechanism is connected between the two limit plates (22), and the adjustment mechanism comprises two double-headed screws (23). The two double-headed screws (23) are both connected to the two limit plates (22). The double-headed screws (23) are connected to a connecting block (25) connected between the limit plates (22). A nut (24) is connected to the double-headed screw (23), and two ends of the double-headed screw (23) are connected to a rotating handle.

7. The airtightness tester for alumina ceramic seals according to claim 1, characterized in that: Each of the clamping mechanisms comprises a second limiting plate (26) and a second nut (28), wherein the second nut (28) is connected to the first limiting plate (22), an adjusting screw (31) is rotatably connected inside the second nut (28), and the second limiting plate (26) is connected to the adjusting screw (31).

8. The air tightness tester for alumina ceramic seals according to claim 7, characterized in that: The two limiting plates 2 (26) are both arc-shaped structures.

9. The air tightness tester for alumina ceramic seals according to claim 7, characterized in that: One end of the adjusting screw rod (31) away from the second limiting plate (26) is connected to an adjusting handle.

10. The airtightness tester for alumina ceramic seals according to claim 1, characterized in that: The connection mechanism comprises two connecting rods one (13) and two connecting rods two (15), the two connecting rods one (13) are respectively connected to the two sides of the top cover two (10), the two connecting rods two (15) are respectively connected to the two sides of the detection cylinder body (9), and a connecting bolt (14) is connected between each connecting rod one (13) and connecting rod two (15).

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