Air tightness detection device for thin-wall crucible
By designing an airtightness detection device suitable for thin-walled platinum crucibles, and using high-pressure testing to simulate a high-temperature environment, the problem of low efficiency and unreliability of detection of thin-walled platinum crucibles in the prior art is solved, and high precision and efficiency are achieved High testing improves yield and reduces production costs.
Patent Information
- Application Number
- CN202421118904.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The prior art cannot efficiently and reliably detect the airtightness of thin-walled platinum crucibles, especially in high temperature environments, resulting in the problems of crucible material leakage, equipment damage and increased production costs during crystal growth.
A thin-wall crucible airtightness detection device is designed, including a support module and a connecting module. The airtightness state in a high-temperature environment is simulated through the sleeve and the leakage detection tube. The airtightness of the crucible is detected by high-pressure testing, which is suitable for A thin-walled platinum crucible with a thickness of 0.1mm, and multiple crucibles can be detected simultaneously.
The high-precision and high-efficiency thin-walled platinum crucible quality inspection is achieved, which significantly improves the yield rate and reduces production costs, can effectively simulate the crucible pressure state in high-temperature environments, and optimizes the crucible processing quality.
Smart Images
Figure CN222336680U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of detection devices, in particular to an airtightness detection device for a thin-wall crucible. Background Art
[0002] Platinum crucibles are usually used in various systems for growing medium and low temperature oxide functional crystals. Among them, thin-walled platinum crucibles are the main components for growing oxide functional crystals by the crucible descent method. The quality of the thin-walled platinum crucible has a significant impact on the quality of crystal growth and the crystallization rate.
[0003] At present, the industrial growth methods of oxide functional crystals include the pulling method and the crucible descent method. The crucible descent method can grow 10-20 crystal rods at a time, which requires 10-20 thin-walled platinum crucibles. In order to improve the quality of crystal growth and the yield rate, it is usually necessary to test the quality of the thin-walled platinum crucibles.
[0004] In the prior art, the crucible used for growing crystals by the Czochralski method is relatively thick, about 1-3 mm, and its quality inspection method is not suitable for the thin-walled platinum crucible of the descent method. At present, the quality inspection method of thin-walled platinum crucibles is mainly to manually apply the penetrant to the inner wall of the crucible, and after 4-6 hours of diffusion and penetration, judge whether the crucible has a leak and the corresponding leak point location based on whether there is red penetrant seeping out of the outer wall. However, the above-mentioned inspection method not only has low work efficiency, but also the inspection results are unreliable, and there is still room for improvement and enhancement.
[0005] On the other hand, the quality inspection method and device of thin-walled platinum crucible only take into account the preliminary quality inspection, and eliminate the larger leaks in the platinum crucible. However, some small leaks and leaks covered by the outer wall after spinning, especially the influence of the expansion of the internal air pressure of the crucible on the quality of the crucible during high-temperature crystal growth, are not taken into account, which may easily cause adverse effects such as crucible leakage, equipment damage, and increased production costs during crystal growth. Utility Model Content
[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide an airtightness detection device suitable for thin-walled crucibles, which can effectively simulate the pressure state of the thin-walled platinum crucible in a high-temperature environment during crystal growth, detect the quality of the thin-walled platinum crucible with high precision, and have high use efficiency.
[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows: an airtightness detection device for a thin-walled crucible comprises a supporting module and a connecting module; the supporting module comprises a base, on which a first bracket and a second bracket are provided, and the first bracket and the second bracket are connected to the connecting module; the connecting module comprises a sleeve, a gas channel is provided through the center of the sleeve, and a thread is provided on the outer wall, one end of the sleeve is connected to a leak detection tube, and the other end is connected to a thin-walled crucible; the diameter of the leak detection tube matches the diameter of the gas channel, and the leak detection tube is externally connected to a one-way valve and / or a pressure gauge.
[0008] Preferably, the sleeve and the leak detection tube are integrally formed, or the sleeve and the leak detection tube are connected by threads or snap-fit.
[0009] Preferably, the first bracket and the second bracket are fixed to the base by fasteners.
[0010] Preferably, the first bracket and the second bracket are buckled on the base.
[0011] Furthermore, the outer diameter of the sleeve matches the thin-walled crucible, and the connection is locked by a clamp or an elastic member. The outer diameter of the sleeve can also be smaller than the inner diameter of the thin-walled crucible, and an elastic ring is provided on the outer diameter of one end connected to the thin-walled crucible.
[0012] Preferably, the leak detection tube can be a straight tube or a curved tube according to needs.
[0013] Beneficial effects of the utility model:
[0014] 1. The utility model can detect platinum crucibles with a thickness of 0.10 mm and is suitable for thin-walled platinum crucible detection.
[0015] 2. The utility model adopts high-pressure testing during detection, and the pressure is close to or equal to the air pressure that the crucible withstands during actual growth. It can effectively simulate the pressure state of the thin-walled platinum crucible in a high-temperature environment during crystal growth, further optimize the crucible processing quality, significantly improve the yield rate and effectively reduce production costs.
[0016] 3. Multiple crucibles can be tested at the same time with high testing efficiency; through the innovative design of the testing system, the processing quality of thin-walled platinum crucibles can be tested in batches with high precision. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 It is a top view schematic diagram of the utility model.
[0019] Figure 3 It is a structural schematic diagram of the utility model, and the bracket base adopts a card slot insertion method.
[0020] Figure 4 yes Figure 3 A schematic diagram of a base of , wherein a plurality of notches are provided on the base.
[0021] Figure 5 It is a three-dimensional view of a threaded sleeve.
[0022] Figure 6 yes Figure 1 A partial enlarged view of the connection between the sleeve and the crucible at point A in the middle.
[0023] Figure 7 This is a partial enlarged view of the connection between the sleeve with elastic ring and the crucible.
[0024] Figure numerals: 1. Support module; 2. Connection module; 11. First bracket; 12. Second bracket; 13. Notch; 14. Base; 15. Fastener; 21. Sleeve; 22. First leak detection tube; 23. Second leak detection tube; 24. Gas channel; 25. Elastic ring; 3. One-way valve; 4. Pressure gauge; 5. Rubber gasket; 6. Clamp; 7. Crucible. DETAILED DESCRIPTION
[0025] In order to better understand the technical solution of the utility model, the embodiments of the utility model are described in detail below in conjunction with specific embodiments. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] The test materials used in the present invention are all common commercial products and can be purchased in the market.
[0027] Reference Figures 1 to 7 As shown, the airtightness detection device of the thin-walled crucible 7 includes a support module 1 and a connection module 2; wherein the support module 1 includes a base 14, a first bracket 11 and a second bracket 12, and a plurality of notches 13 are provided on the base 14, so that the position of the first bracket 11 or the second bracket 12 on the base 14 can be adjusted, which is conducive to testing crucibles 7 of different lengths. The number of notches 13 is adjusted according to the size of the base 14. Figure 1 As shown, the first bracket 11 and the second bracket 12 correspond to 6 connection positions with the thin-walled crucible 7 respectively, which facilitates simultaneous testing of multiple thin-walled crucibles 7 and can effectively improve the detection efficiency.
[0028] Furthermore, the connection module 2 includes a sleeve 21 and a leak detection tube, and the center of the sleeve 21 is provided with a through hole as a gas channel 24. A first leak detection tube 22 is embedded at one end of the sleeve 21, and the first leak detection tube 22 is connected to a one-way valve 3, and the flow rate and flow direction of the external gas are controlled by the one-way valve 3; another sleeve 21 is taken, and a second leak detection tube 23 is embedded at one end of the sleeve 21, and the second leak detection tube 23 is connected to a pressure gauge 4, and the pressure gauge 4 is used as a detection indicator. The leak detection tube can be a straight tube or a curved tube according to needs.
[0029] The first bracket 11 or the second bracket 12 is provided at the notch 13 of the base 14 as follows Figure 1 The fastener 15 shown in the figure can be connected by using Figure 3 and Figure 4 The card slot is inserted as shown.
[0030] As one of the preferred embodiments, the outer diameter of the sleeve 21 is provided with threads, such as Figure 5 As shown, it can be partially threaded, or the entire outer wall of the sleeve 21 can be threaded (not shown in the figure), for connecting to the first bracket 11 and / or the second bracket 12. At this time, the first bracket 11 and the second bracket 12 are provided with a plurality of matching threaded holes.
[0031] like Figure 6 As shown, the contact part between the thin-walled crucible 7 and the sleeve 21 is designed to be clearance-matched, with a clearance of 0.10-0.20 mm. Preferably, an elastic ring 25, such as a silicone ring or a rubber ring, is provided on the outer wall of the end of the sleeve 21 connected to the thin-walled crucible 7. Figure 5 or Figure 7 As shown, in this way, thin-walled crucibles 7 of different diameters can be matched without replacing sleeves 21 of different sizes.
[0032] When in use, the thin-walled crucible 7 is assembled between the two sleeves 21 and locked by the clamp 6 to facilitate airtightness inspection. A rubber gasket 5 can also be added below the clamp 6 as a buffer part to effectively protect the thin-walled crucible 7 from contacting the outer wall, and at the same time can play an auxiliary sealing role to prevent air leakage, and can effectively feedback the airtightness of the overall detection device.
[0033] Specific implementation method: Take the detection of Φ36*450*0.16mm thin-walled platinum crucible 7 as an example. According to the corresponding length of the crucible 7, select the bracket and the base 14 for threaded fastening connection, connect the crucible 7 and the sleeves 21 at both ends, install the corresponding rubber gasket 5 and the clamp 6 for fixing, and connect the corresponding leak detection tube and pressure gauge 4 at the same time. Open the one-way valve 3, and introduce N2. The system pressure is controlled at 0.2MPa. Apply pre-configured soapy water on the outer wall of the crucible 7, maintain the pressure for 10 minutes, and observe the changes in the pointer of the pressure gauge 4. If the pressure decreases and bubbles appear on the outer wall, the leak point of the crucible 7 can be judged according to the initial position of the bubbles. Mark it with a marker pen and return it to the factory for repair. If the pressure does not change, the quality of the crucible is judged to be qualified and it can enter the next process.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for detecting the air tightness of a thin-walled crucible, characterized in that: It comprises a supporting module and a connecting module; the supporting module comprises a base, on which a first bracket and a second bracket are provided, and the first bracket and the second bracket are connected to the connecting module; the connecting module comprises a sleeve, a gas passage is provided through the center of the sleeve, and a thread is provided on the outer wall; one end of the sleeve is connected to a leak detection tube, and the diameter of the leak detection tube matches the diameter of the gas passage.
2. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The sleeve and the leak detection tube are integrally formed.
3. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The sleeve is threadedly connected or snap-fittedly connected to the leak detection pipe.
4. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The first bracket and the second bracket are fixed to the base through fasteners or buckled on the base.
5. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The outer diameter of the sleeve matches the thin-walled crucible and is locked by a clamp or an elastic member.
6. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The outer diameter of the sleeve is smaller than the inner diameter of the thin-walled crucible, and an elastic ring is arranged on the outer diameter of one end of the sleeve connected with the thin-walled crucible.
7. The airtightness detection device for a thin-walled crucible according to claim 1, characterized in that: The leak detection pipe is a straight pipe or a curved pipe.