A device for improving micro-dewar testing efficiency

Abstract

The invention relates to the field of micro-dewar testing technology, and in particular to a device for improving micro-dewar testing efficiency. The device comprises a base, wherein a top outer wall of the base is provided with a liquid nitrogen injection pipe, an outer wall of one side of the base is provided with a mounting groove, an inner wall of the mounting groove is fixedly connected with a liquid nitrogen introduction pipe, and the liquid nitrogen injection pipe and the liquid nitrogen introduction pipe are communicated with each other. The device further comprises: a limiting mechanism, wherein the limiting mechanism is provided on the outer wall of the base; the limiting mechanism comprises a micro-dewar connecting end fixedly connected to the outer wall of one side of the base; the invention utilizes the guidance of the exhausted cold air and the movement of the linkage limiting plate to clamp and limit the micro-dewar, thereby improving structural stability, avoiding displacement or deformation of the micro-dewar during a rapid temperature change, and affecting the accuracy of the test result; the clamping state can also be adjusted according to the test process, and the introduced liquid nitrogen cools the micro-dewar, thereby avoiding test data deviation caused by temperature changing the optical path, and improving the test efficiency of the micro-dewar.

Description

Technical Field

[0001] The invention relates to the technical field of micro-dewar testing, in particular to a device for improving micro-dewar testing efficiency. Background Art

[0002] In the research, development and production of cooled infrared detectors and quantum devices, micro-dewar, as a core packaging component, directly affects the product iteration speed and quality verification cycle, and its performance needs to be tested.

[0003] There are two main options for testing the micro-dewar of traditional refrigerated infrared detectors: using a temporary coupled refrigerator, which will greatly increase time and labor costs; inverting the micro-dewar to test its performance through a mirror reflection light path. This process will cause test data deviation due to refraction of the light path, making it impossible to accurately judge the performance of the micro-dewar; directly flushing it into liquid nitrogen and testing it after the temperature stabilizes. In the initial stage, there may be a lack of sufficient clamping force, causing the micro-dewar to move or deform during rapid temperature changes, affecting the accuracy of the test results and reducing the test efficiency of the micro-dewar. Summary of the Invention

[0004] The object of the present invention is to provide a device for improving micro-Dewar testing efficiency to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention is: a device for improving the efficiency of micro-Dewar testing, comprising a base, a liquid nitrogen injection pipe provided on the top outer wall of the base, a mounting groove formed on one side outer wall of the base, a liquid nitrogen introduction pipe fixedly connected to the inner wall of the mounting groove, the liquid nitrogen injection pipe and the liquid nitrogen introduction pipe being in communication, and further comprising;

[0006] A limiting mechanism, wherein the limiting mechanism is arranged on the outer wall of the base;

[0007] The cam is fixedly provided with a toothed connecting strip which is adapted to connect the toothed connecting strip to the toothed connecting strip, and the cam is fixedly provided with a toothed connecting strip which is adapted to connect the toothed connecting strip to the toothed connecting strip.

[0008] Preferably, the micro-Dewar connecting end and the limit plate are adapted to the size of the micro-Dewar body, the bimetallic plate is located inside the spiral tube, a one-way valve is installed on the inner wall of the air inlet pipe, and the liquid nitrogen injection pipe is arranged in a conical shape.

[0009] Preferably, the outer walls on both sides of the top of the base are fixedly connected with reinforcement frames, the reinforcement frames are fixedly connected to the outer wall of the air inlet pipe, the outer wall on one side of the top of the base is fixedly connected with a collection box, and the outer wall on one side of the collection box is provided with an air outlet pipe.

[0010] Preferably, connecting holes are opened on the outer walls of both sides of the collecting box, the air inlet pipe is fixedly connected to the inner wall of the connecting hole, the outer wall of the micro-Dewar connecting end is fixedly connected to an annular frame, the top outer wall of the annular frame is fixedly connected to an arc tube, and the air outlet pipe is fixedly connected to the top outer wall of the arc tube.

[0011] Preferably, the outer walls on both sides of the bottom end of the arc tube are fixedly connected to an L-shaped tube, the inner wall on one side of the L-shaped tube is fixedly connected to a fixed tube, the inner wall of the annular frame is slidably connected to an annular tube, and the outer wall on one side of the annular tube is fixedly connected to an outer plate.

[0012] Preferably, the outer plate is adapted to the size of the micro-Dewar connection end, the annular tube is adapted to the size of the annular frame, an elastic sealing gasket is fixedly connected to the outer wall of one side of the outer plate, and the elastic sealing gasket is adapted to the size of the micro-Dewar body.

[0013] Preferably, the outer plate and the outer wall of one side of the annular tube are provided with two insertion holes, the fixed tube is slidably connected to the inner wall of the insertion hole, the outer wall of the annular tube is provided with an air outlet, the outer wall of the annular frame is provided with an exhaust hole, and the air outlet hole is adapted to the size of the exhaust hole.

[0014] Preferably, the limit plates are located on both sides of the micro-Dewar connection end, the L-shaped tubes are located on both sides of the outer plate, positioning holes are opened at the four corners of the outer wall of the bottom end of the base, and the liquid nitrogen inlet tube is adapted to the size of the micro-Dewar body.

[0015] The present invention provides a device for improving the efficiency of micro-Dewar testing through improvement. Compared with the prior art, it has the following improvements and advantages:

[0016] First, the present invention is provided with a base, a liquid nitrogen inlet tube, a spiral tube, a bimetallic plate, a micro-dewar connecting end, a limit plate and a rotating shaft. The initial output air cooling effect is stronger, the bending force of the bimetallic plate is greater, and a stronger initial supporting force is provided, thereby ensuring the structural stability of the micro-dewar in the initial stage. As the test progresses, the internal temperature of the micro-dewar gradually stabilizes and the output air temperature also rises, thereby reducing the clamping force of the limit plate, reducing continuous mechanical stress, and reducing the risk of material fatigue damage. By slowly relaxing the clamping structure, the micro-dewar can better adapt to temperature changes and avoid stress concentration or deformation caused by temperature changes. The uniform cooling of the base can prevent local overheating or uneven temperature, thereby ensuring the stability of the test environment. By guiding the exhaust cold air, the movement of the limit plate is linked to clamp and limit the micro-dewar, thereby improving structural stability and preventing the micro-dewar from displacement or deformation during rapid temperature changes, thereby affecting the accuracy of the test results. The clamping state can also be adjusted according to the test process. The introduced liquid nitrogen cools the micro-dewar to avoid test data deviation caused by temperature changes in the optical path, thereby improving the test efficiency of the micro-dewar.

[0017] Second, the present invention is provided with an air intake pipe, a collection box, an outer plate, an annular tube, an annular frame and an elastic sealing gasket. By rationally designing the air guide path and the pushing structure of the elastic sealing gasket, the air derived from the micro-dewar can be effectively utilized to push the elastic sealing gasket, thereby achieving sealing of the connection of the micro-dewar body and increasing the accuracy of the auxiliary micro-dewar body test. When the micro-dewar body test is completed and no air is output, the elastic sealing gasket is reset and the limit plate is separated to release the micro-dewar body, thereby facilitating the replacement operation and further improving the test efficiency of the micro-dewar body.

[0018] Third: The present invention is provided with a spiral tube and a reinforcement frame. The setting of the spiral tube makes the output air path longer and more uniform, thereby optimizing the cooling effect on the base and the bimetallic plate, reducing thermal interference, and improving system stability. The air intake pipe is reinforced by the reinforcement frame, thereby improving the safety of the micro-Dewar test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and examples:

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the spiral tube of the present invention;

[0023] Figure 4 This is a schematic diagram of the micro-Dewar connection end of the present invention;

[0024] Figure 5 is a schematic diagram of a bimetallic plate of the present invention;

[0025] Figure 6 is a schematic diagram of an arc tube of the present invention;

[0026] Figure 7 This is an exploded schematic diagram of the annular frame connection structure of the present invention;

[0027] Figure 8 is a schematic diagram of an annular tube of the present invention;

[0028] Figure 9 It is a cross-sectional top view of the outer plate structure of the present invention.

[0029] Description of reference numerals:

[0030] 1. Base; 2. Liquid nitrogen injection tube; 3. Collection box; 4. Air outlet pipe; 5. Air inlet pipe; 6. Arc tube; 7. Outer plate; 8. L-shaped tube; 9. Liquid nitrogen inlet pipe; 10. Limit plate; 11. Micro Dewar connection end; 12. Ring frame; 13. Mounting groove; 14. Spiral tube; 15. Support; 16. Vent pipe; 17. Fixed tube; 18. Rotating shaft; 19. Telescopic plate; 20. Bimetallic plate; 21. Clamping groove; 22. Socket; 23. Ring tube; 24. Air outlet; 25. Exhaust hole; 26. Elastic sealing gasket; 27. U-shaped frame; 28. Reinforcement frame; 29. ​​Circular groove. DETAILED DESCRIPTION

[0031] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] The present invention provides a device for improving the efficiency of micro-Dewar testing through improvement. The technical solution of the present invention is:

[0033] like Figures 1-9 As shown, a device for improving micro-Dewar test efficiency includes a base 1, a liquid nitrogen injection pipe 2 is provided on the top outer wall of the base 1, a mounting groove 13 is opened on one side outer wall of the base 1, a liquid nitrogen introduction pipe 9 is fixedly connected to the inner wall of the mounting groove 13, and the liquid nitrogen injection pipe 2 and the liquid nitrogen introduction pipe 9 are connected, and further includes;

[0034] A limiting mechanism is provided on the outer wall of the base 1;

[0035] The limiting mechanism includes a micro-Dewar connection end 11 fixedly connected to the outer wall of one side of the base 1, and two circular grooves 29 are provided on the outer wall of one side of the base 1. The inner wall of the circular groove 29 is fixedly connected to the spiral tube 14, and the outer wall of one side of the spiral tube 14 is fixedly connected to the air inlet pipe 5. The outer wall of the other side of the spiral tube 14 is fixedly connected to the exhaust pipe 16. The inner walls on both sides of the mounting groove 13 are provided with exhaust holes, and the exhaust pipe 16 is fixedly connected to the inner wall of the exhaust hole. The inner wall of one side of the circular groove 29 is fixedly connected to the support 15, and the outer wall of one side of the support 15 is fixedly connected to the double The metal plate 20 and the outer wall of one side of the bimetallic plate 20 are fixedly connected with the telescopic plate 19. The outer wall of one side of the base 1 is provided with two slide rails. The inner walls of the two slide rails are slidably connected with the limit plate 10. The outer wall of the limit plate 10 is fixedly connected with the U-shaped frame 27. The inner wall of the U-shaped frame 27 is rotatably provided with a rotating shaft 18. One end of the piston rod of the telescopic plate 19 is fixedly connected to the outer wall of the rotating shaft 18. A clamping groove 21 is provided on the outer wall of one side of the limit plate 10. Limiting holes are provided on the outer walls of both sides of the micro-Dewar connecting end 11. The size of the limit plate 10 is adapted to that of the limit hole.

[0036] Furthermore, the micro-dewar connecting end 11 and the limit plate 10 are adapted to the size of the micro-dewar body, the bimetallic plate 20 is located inside the spiral tube 14, a one-way valve is installed on the inner wall of the air inlet pipe 5, the liquid nitrogen injection pipe 2 is arranged in a conical shape, and the outer walls on both sides of the top of the base 1 are fixedly connected to the reinforcement frame 28, the reinforcement frame 28 is fixedly connected to the outer wall of the air inlet pipe 5, and the outer wall on one side of the top of the base 1 is fixedly connected to the collection box 3, and the outer wall on one side of the collection box 3 is provided with an outlet pipe 4.

[0037] Furthermore, connecting holes are provided on the outer walls on both sides of the collecting box 3, the air inlet pipe 5 is fixedly connected to the inner wall of the connecting hole, the outer wall of the micro-Dewar connecting end 11 is fixedly connected to the annular frame 12, the top outer wall of the annular frame 12 is fixedly connected to the arc tube 6, the air outlet pipe 4 is fixedly connected to the top outer wall of the arc tube 6, the outer walls on both sides of the bottom end of the arc tube 6 are fixedly connected to the L-shaped tube 8, the inner wall of one side of the L-shaped tube 8 is fixedly connected to the fixed tube 17, the inner wall of the annular frame 12 is slidably connected to the annular tube 23, and the outer wall of one side of the annular tube 23 is fixedly connected to the outer plate 7.

[0038] Furthermore, the outer plate 7 is adapted to the size of the micro-Dewar connection end 11, the annular tube 23 is adapted to the size of the annular frame 12, and an elastic sealing gasket 26 is fixedly connected to the outer wall of one side of the outer plate 7. The elastic sealing gasket 26 is adapted to the size of the micro-Dewar body. Two sockets 22 are provided on the outer wall of one side of the outer plate 7 and the annular tube 23. The fixed tube 17 is slidably connected to the inner wall of the socket 22. An air outlet 24 is provided on the outer wall of the annular tube 23, and an exhaust hole 25 is provided on the outer wall of the annular frame 12. The size of the air outlet 24 and the exhaust hole 25 are adapted. The limit plate 10 is located on both sides of the micro-Dewar connection end 11, and the L-shaped tube 8 is located on both sides of the outer plate 7. , positioning holes are opened at the four corners of the outer wall of the bottom end of the base 1, the liquid nitrogen inlet tube 9 is adapted to the size of the micro-Dewar body, and the elastic sealing gasket 26 provided on the outer plate 7 is close to the micro-Dewar connecting end 11. The elastic sealing gasket 26 is compressed to seal the connection between the micro-Dewar connecting end 11 and the micro-Dewar body. At this time, the air outlet 24 on the annular tube 23 is aligned with the exhaust hole 25 on the annular frame 12, and the excess air is discharged through the air outlet 24 and the exhaust hole 25. The continuously output air causes the elastic sealing gasket 26 to be continuously compressed for sealing. When the micro-Dewar body test is completed and no air is output, the elastic sealing gasket 26 is also reset.

[0039] Working principle: When performing a performance test on the micro-Dewar body, the micro-Dewar core tube to be tested is inserted into the micro-Dewar connection end 11 of the base 1, and then liquid nitrogen is injected through the liquid nitrogen injection tube 2. The liquid nitrogen enters the micro-Dewar body through the liquid nitrogen injection tube 2 and the liquid nitrogen introduction tube 9. The micro-Dewar body is cooled and cooled. The mounting groove 13 of the base 1 is adapted to the size of the micro-Dewar core tube. There is a certain distance between the liquid nitrogen introduction tube 9 and the inner wall of the mounting groove 13. After the liquid nitrogen is introduced, the air output enters the bleed pipe 16 through the bleed hole of the mounting groove 13. The air enters the spiral tube 1 through the bleed pipe 16. 4, as the spiral path outputs, the base 1 is evenly cooled, and the bimetallic plate 20 connected to the internal support 15 is also cooled. The bimetallic plate 20 bends to drive the two limit plates 10 to slide. The two limit plates 10 slide on both sides of the micro-Dewar connection end 11 and are inserted into the limit holes of the micro-Dewar connection end 11 to clamp and limit the micro-Dewar to ensure the stability of the structure. When the limit plate 10 slides, the shaft 18 rotates to adjust the angle, and the telescopic plate 19 automatically expands and contracts to adapt to the situation. There is a certain distance between the bimetallic plate 20 and the spiral tube 14 to ensure the stability of the bimetallic plate 20. The metal plate 20 can be bent freely and will not be blocked by the spiral tube 14. By guiding the exhaust cold air, the cold air can evenly cool the bimetallic plate 20 and the base 1 when flowing through the spiral tube 14. The bimetallic plate 20 drives the limit plate 10 to slide and cooperate with the rubber pad in the clamping groove 21 to clamp the micro-dewar to ensure the stability of the test process. The initial output air cooling effect is stronger, the bimetallic plate 20 has a greater bending force, and provides a stronger initial support force to ensure the structural stability of the micro-dewar in the initial stage. As the test progresses, the internal temperature of the micro-dewar Gradually stabilize, the output air temperature also rises, reducing the clamping force of the limit plate 10, reducing continuous mechanical stress, and reducing the risk of material fatigue damage. By slowly relaxing the clamping structure, the micro-Dewar can better adapt to temperature changes and avoid stress concentration or deformation caused by temperature changes. The uniform cooling of the base 1 can prevent local overheating or uneven temperature, ensuring the stability of the test environment. The introduced liquid nitrogen cools the micro-Dewar, and the test can be carried out directly when the Dewar temperature drops to the liquid nitrogen temperature, avoiding test data deviation caused by temperature changes in the optical path.

[0040] The spiral tube 14 is made of stainless steel that is resistant to low temperatures and corrosion, the elastic sealing gasket 26 is made of silicone rubber that is resistant to low temperatures and has good elasticity, the annular tube 23 and the outer plate 7 are made of lightweight and low-temperature resistant aluminum alloy, the output air is collected by the collecting box 3 through the air inlet pipe 5, and the one-way valve arranged in the air inlet pipe 5 prevents air from flowing back, and the air enters the arc tube 6 through the air outlet pipe 4, and finally enters the annular tube 23 through the L-shaped tube 8 and the fixed tube 17. The air quickly fills the annular tube 23 and pushes the outer plate 7 and the annular tube 23, so that the outer plate 7 and the annular tube 23 slide on the inner wall of the annular frame 12 and the outer wall of the fixed tube 17 close to the micro-Dewar connection end 11, and the elastic sealing gasket 26 arranged on the outer plate 7 is close to the micro-Dewar connection At the connecting end 11, the elastic sealing gasket 26 is compressed to seal the connection between the micro-Dewar connecting end 11 and the micro-Dewar body. At this time, the air outlet 24 on the annular tube 23 is aligned with the exhaust hole 25 on the annular frame 12, and the excess air is discharged through the air outlet 24 and the exhaust hole 25. The continuously output air causes the elastic sealing gasket 26 to be continuously compressed for sealing. When the micro-Dewar body test is completed and no air is output, the elastic sealing gasket 26 is also reset, and the bimetallic plate 20 is also restored to a horizontal state. The limiting plate 10 and the elastic sealing gasket 26 release the micro-Dewar body and can be easily removed for replacement. The reinforcement frame 28 provided on the base 1 supports and reinforces the air inlet pipe 5 to further improve the structural stability.

[0041] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A device for improving micro-Dewar test efficiency, comprising a base (1), a liquid nitrogen injection pipe (2) provided on the top outer wall of the base (1), a mounting groove (13) provided on one side outer wall of the base (1), a liquid nitrogen introduction pipe (9) fixedly connected to the inner wall of the mounting groove (13), the liquid nitrogen injection pipe (2) and the liquid nitrogen introduction pipe (9) being in communication, characterized in that: Also includes; A limiting mechanism, the limiting mechanism being arranged on the outer wall of the base (1); The limiting mechanism includes a micro-Dewar connection end (11) fixedly connected to the outer wall of one side of the base (1), two circular grooves (29) are provided on the outer wall of one side of the base (1), a spiral tube (14) is fixedly connected to the inner wall of the circular groove (29), an air inlet pipe (5) is fixedly connected to the outer wall of one side of the spiral tube (14), and an air discharge pipe (16) is fixedly connected to the outer wall of the other side of the spiral tube (14), air discharge holes are provided on the inner walls of both sides of the mounting groove (13), and the air discharge pipe (16) is fixedly connected to the inner wall of the air discharge hole, a support (15) is fixedly connected to the inner wall of one side of the circular groove (29), and a bimetallic plate (20) is fixedly connected to the outer wall of one side of the support (15), and the bimetallic plate (20) is fixedly connected to the inner wall of the bimetallic plate (20). The outer wall of one side of the metal plate (20) is fixedly connected to a telescopic plate (19), the outer wall of one side of the base (1) is provided with two slide rails, the inner walls of the two slide rails are slidably connected to a limit plate (10), the outer wall of the limit plate (10) is fixedly connected to a U-shaped frame (27), the inner wall of the U-shaped frame (27) is rotatably provided with a rotating shaft (18), one end of the piston rod of the telescopic plate (19) is fixedly connected to the outer wall of the rotating shaft (18), a clamping groove (21) is provided on the outer wall of one side of the limit plate (10), and limit holes are provided on the outer walls of both sides of the micro-Dewar connection end (11), the limit plate (10) is adapted to the size of the limit hole, and the bimetallic plate (20) is located inside the spiral tube (14).

2. The device for improving micro-Dewar testing efficiency according to claim 1, characterized in that: The micro-Dewar connection end (11) and the limit plate (10) are adapted to the size of the micro-Dewar body, a one-way valve is installed on the inner wall of the air inlet pipe (5), and the liquid nitrogen injection pipe (2) is arranged in a conical shape.

3. The device for improving micro-Dewar testing efficiency according to claim 1, characterized in that: The outer walls on both sides of the top of the base (1) are fixedly connected to reinforcement frames (28), and the reinforcement frames (28) are fixedly connected to the outer wall of the air inlet pipe (5). The outer wall on one side of the top of the base (1) is fixedly connected to the collection box (3), and the outer wall on one side of the collection box (3) is provided with an air outlet pipe (4).

4. The device for improving micro-Dewar testing efficiency according to claim 3, characterized in that: The outer walls of both sides of the collecting box (3) are provided with connection holes, the air inlet pipe (5) is fixedly connected to the inner wall of the connection hole, the outer wall of the micro-Dewar connection end (11) is fixedly connected to an annular frame (12), the top outer wall of the annular frame (12) is fixedly connected to an arc-shaped pipe (6), and the air outlet pipe (4) is fixedly connected to the top outer wall of the arc-shaped pipe (6).

5. The device for improving micro-Dewar testing efficiency according to claim 4, characterized in that: The outer walls on both sides of the bottom end of the arc-shaped tube (6) are fixedly connected to an L-shaped tube (8), the inner wall on one side of the L-shaped tube (8) is fixedly connected to a fixed tube (17), the inner wall of the annular frame (12) is slidably connected to an annular tube (23), and the outer wall on one side of the annular tube (23) is fixedly connected to an outer plate (7).

6. The device for improving micro-Dewar testing efficiency according to claim 5, characterized in that: The outer plate (7) is adapted to the size of the micro-Dewar connecting end (11), the annular tube (23) is adapted to the size of the annular frame (12), and an elastic sealing gasket (26) is fixedly connected to the outer wall of one side of the outer plate (7), and the elastic sealing gasket (26) is adapted to the size of the micro-Dewar body.

7. The device for improving micro-Dewar testing efficiency according to claim 6, characterized in that: Two insertion holes (22) are provided on the outer wall of one side of the outer plate (7) and the annular tube (23); the fixed tube (17) is slidably connected to the inner wall of the insertion hole (22); an air outlet hole (24) is provided on the outer wall of the annular tube (23); an exhaust hole (25) is provided on the outer wall of the annular frame (12); and the air outlet hole (24) and the exhaust hole (25) are adapted in size.

8. The device for improving micro-Dewar testing efficiency according to claim 5, characterized in that: The limiting plates (10) are located on both sides of the micro-Dewar connection end (11), the L-shaped tube (8) is located on both sides of the outer plate (7), positioning holes are provided at the four corners of the outer wall of the bottom end of the base (1), and the liquid nitrogen inlet tube (9) is adapted to the size of the micro-Dewar body.

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