A vacuum low-vibration closed-loop thermostat

Abstract

This application relates to the field of closed-loop thermostats, and provides a vacuum low-vibration closed-loop thermostat, which includes a housing, a cold head mounting bracket, and vibration-damping bellows. The cold head mounting bracket is used for mounting the cold head. Two vibration-damping bellows are provided, and the two bellows are respectively connected to the upper and lower ends of the cold head mounting bracket. The cold head mounting bracket is connected to the housing through the vibration-damping bellows. This application has the effect of reducing the impact of the closed-loop thermostat on testing during the testing process.

Description

Technical Field

[0001] This application relates to the field of closed-loop thermostats, and more particularly to a vacuum low-vibration closed-loop thermostat. Background Technology

[0002] Vacuum sample stages are typically used for sample testing in laboratories. Depending on the actual situation, it is necessary to maintain a low / high temperature inside the testing equipment and then conduct tests under the corresponding vacuum low / high temperature conditions. Therefore, a closed-loop thermostat needs to be set up in the testing equipment to maintain a constant temperature in the testing environment.

[0003] However, closed-loop thermostats generate vibrations during operation, which can significantly impact testing equipment, especially for demanding tests. Therefore, vibration damping designs need to be incorporated into closed-loop thermostats. Utility Model Content

[0004] To reduce the impact of closed-loop thermostats on testing during the testing process, this application provides a low-vibration closed-loop thermostat.

[0005] The low-vibration closed-loop thermostat provided in this application adopts the following technical solution:

[0006] A low-vibration closed-loop thermostat includes a housing, a cold head mounting bracket, and vibration-damping bellows. The cold head mounting bracket is used for mounting the cold head. Two vibration-damping bellows are provided, and the two vibration-damping bellows are respectively connected to the upper and lower ends of the cold head mounting bracket. The cold head mounting bracket is connected to the housing through the vibration-damping bellows.

[0007] By adopting the above technical solution, a cold head mounting bracket is set in the low-vibration closed-loop thermostat for cold head installation, and two damping bellows are connected to the upper and lower ends of the cold head mounting bracket and the shell, respectively. This can reduce the impact of vibration generated by the closed-loop thermostat during operation on the test equipment.

[0008] Optionally, the shock-absorbing corrugated pipe is connected to the cold head mounting bracket by bolts.

[0009] By adopting the above technical solution, based on a low-vibration closed-loop thermostat consisting of a shell, a cold head mounting bracket, and two damping bellows connected to the upper and lower ends of the cold head mounting bracket and connected to the shell, the damping bellows and the cold head mounting bracket are bolted together, which can effectively fix their positions and ensure structural stability, thereby better exerting the damping effect of the damping bellows and reducing the impact of vibration generated by the closed-loop thermostat during operation on the test equipment.

[0010] Optionally, the damping bellows has an end ring, and the end ring has a first through hole for the bolt to pass through; the cold head mounting bracket has a second through hole for the bolt to pass through; the bolt is threaded with a nut; a first damping pad is provided on the inner wall of the first through hole, and a second damping pad is provided on the inner wall of the second through hole, both the first damping pad and the second damping pad being used for the bolt's thread to abut against.

[0011] By adopting the above technical solution, two damping bellows are respectively connected to the upper and lower ends of the cold head mounting bracket, so that the cold head mounting bracket is connected to the shell through the damping bellows, which can play a preliminary damping role; the damping bellows and the cold head mounting bracket are connected by bolts; a first damping pad is set on the inner wall of the first through hole of the end ring of the damping bellows, and a second damping pad is set on the inner wall of the second through hole of the cold head mounting bracket, and the bolts of the two are made to abut against each other, which can further reduce the vibration transmission between the cold head mounting bracket and the damping bellows, and reduce the impact of the vibration generated by the closed-loop thermostat on the test equipment during operation.

[0012] Optionally, a shock-absorbing spring is provided between the cold head mounting bracket and the shock-absorbing bellows.

[0013] By adopting the above technical solution, the cold head mounting bracket and the shock-absorbing bellows are connected to the upper and lower ends of the shell through two shock-absorbing bellows to achieve initial shock absorption. The shock-absorbing bellows and the cold head mounting bracket are connected by bolts to ensure a stable connection structure. Furthermore, a shock-absorbing spring is set between the cold head mounting bracket and the shock-absorbing bellows to further enhance the shock absorption effect of the low-vibration closed-loop thermostat.

[0014] Optionally, the shock-absorbing spring is sleeved on the bolt's thread.

[0015] By adopting the above technical solution, based on the housing, the cold head mounting bracket, and two damping bellows connected to the upper and lower ends of the cold head mounting bracket and connected to the housing, the damping bellows are bolted to the cold head mounting bracket, and damping pads are provided between them. On this basis, damping springs are sleeved on the bolt threads, which can enhance the damping effect of the closed-loop thermostat and reduce the impact of the vibration generated by the closed-loop thermostat during operation on the test equipment.

[0016] Optionally, the damping spring is in a compressed state.

[0017] By adopting the above technical solution, the shock-absorbing bellows connects the cold head mounting bracket and the shell to achieve shock absorption. The bolts connect the shock-absorbing bellows to the cold head mounting bracket, and the first and second through holes are respectively provided with first and second shock-absorbing pads to further enhance shock absorption. The shock-absorbing spring is sleeved on the bolt thread and is in a compressed state, so that the shock-absorbing spring can continuously play a buffering and shock-absorbing effect, and better reduce the impact of the vibration generated by the closed-loop thermostat on the test equipment.

[0018] Optionally, a counterweight is provided at the bottom of the cold head mounting bracket.

[0019] By adopting the above technical solutions, the vibration generated by the closed-loop thermostat during operation can be reduced to decrease the impact on the testing equipment; and by setting a counterweight at the bottom of the cold head mounting bracket, stability can be further improved and the impact of vibration can be reduced.

[0020] Optionally, the bottom of the housing is provided with multiple columns.

[0021] By adopting the above technical solution, the low-vibration closed-loop thermostat consists of a shell, a cold head mounting bracket, and two shock-absorbing bellows connected to the upper and lower ends of the cold head mounting bracket and connected to the shell. On this basis, multiple columns are set at the bottom of the shell to enhance the support stability of the entire low-vibration closed-loop thermostat and reduce the possibility of vibrations caused by uneven ground or other factors being transmitted to the thermostat.

[0022] Optionally, the column is an air spring.

[0023] By adopting the above technical solution, the column at the bottom of the low-vibration closed-loop thermostat housing is set as an air spring. The good shock absorption performance of the air spring can be used to further reduce the vibration generated by the closed-loop thermostat during operation, and reduce the impact of vibration on the test equipment, especially optical test equipment.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By using a combination of shock-absorbing measures such as shock-absorbing bellows, shock-absorbing springs and counterweights, the vibration generated during the operation of the closed-loop thermostat is effectively absorbed and buffered, reducing the impact of vibration on the testing equipment and improving the stability and accuracy of the test results, especially for optical testing equipment.

[0026] 2. By installing a damping spring between the cold head mounting bracket and the damping bellows, and the damping spring is sleeved on the bolt thread, when the closed-loop thermostat vibrates, the compressed damping spring will elastically expand and contract, further absorbing and buffering vibration energy and reducing the transmission of vibration.

[0027] 3. The use of air spring columns isolates the transmission of ground vibrations, further optimizing the testing environment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0029] Figure 2 This is a schematic diagram illustrating the installation position of the shock-absorbing bellows in Example 1.

[0030] Figure 3 This is a schematic diagram illustrating the structure of the first through hole and the second through hole in Embodiment 1.

[0031] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Cold head mounting bracket; 21. Second through hole; 22. Second damping pad; 3. Damping bellows; 31. End ring; 32. First through hole; 33. First damping pad; 4. Counterweight; 5. Column; 6. Bolt; 7. Nut; 8. Damping spring. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses a vacuum low-vibration closed-loop thermostat.

[0035] Example 1

[0036] Reference Figures 1 to 3 A vacuum low-vibration closed-loop thermostat includes a housing 1, a cold head mounting bracket 2, and a vibration-damping bellows 3. The cold head mounting bracket 2 is used for mounting the cold head. The cold head mounting bracket 2 is connected to the housing 1 via the vibration-damping bellows 3. The vibration-damping bellows 3 absorbs and buffers vibration energy, reducing vibration transmission and minimizing vibration transmitted to the housing 1 during operation of the closed-loop thermostat, thus preventing significant impact on testing equipment, especially optical testing equipment, due to vibration.

[0037] Specifically, the cold head mounting bracket 2 is generally made of metal, such as aluminum alloy or stainless steel. Aluminum alloy is lighter, which helps reduce the overall weight, while stainless steel has better strength and corrosion resistance. The cold head mounting bracket 2 can be a frame structure, which facilitates the installation of the cold head and connection with other components. Of course, it can also be a one-piece block structure, which can provide more stable support.

[0038] Two damping bellows 3 are provided, and the two damping bellows 3 are respectively connected to the upper and lower ends of the cold head mounting bracket 2. The damping bellows 3 and the cold head mounting bracket 2 are connected by bolts 6. The damping bellows 3 has an end ring 31, and the end ring 31 has a first through hole 32 for the bolt 6 to pass through. The cold head mounting bracket 2 has a second through hole 21 for the bolt 6 to pass through. The bolt 6 is threaded with a nut 7, and the damping bellows 3 and the cold head mounting bracket 2 are firmly connected by tightening the nut 7.

[0039] Furthermore, a counterweight 4 is provided at the bottom of the cold head mounting bracket 2. The counterweight 4 can be made of high-density materials such as cast iron or lead blocks. By increasing the weight of the cold head mounting bracket 2, its stability is improved and the impact of vibration is reduced.

[0040] Furthermore, the bottom of the housing 1 is equipped with multiple uprights 5, each of which is an air spring. The air spring consists of a rubber bladder and internal compressed air, providing excellent shock absorption and load-bearing capacity. The air spring automatically adjusts its height and stiffness according to changes in load, effectively isolating vibrations from the ground from being transmitted to the housing 1, further ensuring the stable operation of the testing equipment.

[0041] The implementation principle of Example 1 is as follows: By comprehensively using various damping measures such as the damping bellows 3, damping springs 8, and counterweights 4, the vibrations generated during the operation of the closed-loop thermostat are effectively absorbed and buffered, reducing the impact of vibration on the testing equipment and improving the stability and accuracy of the test results, especially for optical testing equipment. Simultaneously, the air spring column 5 isolates the transmission of ground vibrations, further optimizing the testing environment.

[0042] Example 2

[0043] Reference Figure 4 The difference between this embodiment and Embodiment 1 is that a first damping pad 33 is provided on the inner wall of the first through hole 32, and a second damping pad 22 is provided on the inner wall of the second through hole 21. Both the first damping pad 33 and the second damping pad 22 are used for the bolt 6 to abut against. The first damping pad 33 and the second damping pad 22 can be made of elastic materials such as rubber or silicone to further absorb the vibration of the bolt 6 connection and enhance the damping effect.

[0044] In addition, a damping spring 8 is installed between the cold head mounting bracket 2 and the damping bellows 3. The damping spring 8 is sleeved on the threaded rod of the bolt 6 and is in a compressed state. The damping spring 8 is generally a helical spring made of spring steel, which has good elasticity and recovery performance. When the closed-loop thermostat vibrates, the compressed damping spring 8 will elastically expand and contract, further absorbing and buffering the vibration energy and reducing the transmission of vibration.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-vibration closed-cycle thermostat, characterized by: It includes a housing (1), a cold head mounting bracket (2), and a shock-absorbing corrugated pipe (3); the cold head mounting bracket (2) is used for mounting the cold head; there are two shock-absorbing corrugated pipes (3), which are respectively connected to the upper and lower ends of the cold head mounting bracket (2), and the cold head mounting bracket (2) is connected to the housing (1) through the shock-absorbing corrugated pipes (3).

2. A low vibration closed loop thermostat according to claim 1, wherein: The shock-absorbing corrugated pipe (3) is connected to the cold head mounting bracket (2) by bolts (6).

3. A low vibration closed loop thermostat according to claim 2, wherein: The damping corrugated pipe (3) has an end ring (31), and the end ring (31) has a first through hole (32) through which the bolt (6) passes; the cold head mounting bracket (2) has a second through hole (21) through which the bolt (6) passes; the bolt (6) is threaded with a nut (7); the inner wall of the first through hole (32) is provided with a first damping pad (33), and the inner wall of the second through hole (21) is provided with a second damping pad (22), and both the first damping pad (33) and the second damping pad (22) are used for the bolt (6) to abut against the screw.

4. A low vibration closed cycle thermostat according to claim 3, wherein: A shock-absorbing spring (8) is provided between the cold head mounting bracket (2) and the shock-absorbing bellows (3).

5. A low vibration closed cycle thermostat according to claim 4, wherein: The shock-absorbing spring (8) is sleeved on the threaded rod of the bolt (6).

6. A low vibration closed cycle thermostat according to claim 4 or 5, characterised in that: The damping spring (8) is in a compressed state.

7. A low vibration closed loop thermostat according to claim 1, wherein: The bottom of the cold head mounting bracket (2) is provided with a counterweight (4).

8. A low vibration closed loop thermostat according to claim 1, wherein: The bottom of the housing (1) is provided with multiple columns (5).

9. A low vibration closed loop thermostat according to claim 8, wherein: The column (5) is an air spring.

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