Damping vacuum corrugated pipe structure

Abstract

The utility model belongs to the technical field of extremely low temperature refrigeration, and particularly discloses a damping vacuum corrugated pipe structure. The problem that a damping structure capable of achieving damping in a wider vibration frequency range except the low-frequency range is lacked currently is effectively solved. Comprising a vacuum corrugated pipe, the upper end and the lower end of the vacuum corrugated pipe are each provided with a corrugated pipe flange, a plurality of adjusting screw and nut assemblies used for adjusting the height of the vacuum corrugated pipe are evenly arranged on the corrugated pipe flanges in the circumferential direction of the corrugated pipe flanges, and a plurality of flexible liquid damping structures are evenly arranged on the vacuum corrugated pipe in the circumferential direction. The flexible liquid damping structure comprises a closed flexible shell, a damping medium is arranged in the flexible shell, the upper end and the lower end of the flexible shell are each provided with a connecting flange, and the connecting flanges are connected with the adjacent corrugated pipe flanges through screws. The damping device can be applied to damping of a low-frequency range and a wider vibration frequency beyond the low-frequency range, and is simple in structure, high in modularization degree and easy to install.

Description

TECHNICAL FIELD

[0001] The utility model belongs to extremely low temperature refrigeration technical field especially relates to a shock absorption vacuum bellows structure. BACKGROUND

[0002] The extremely low temperature dilution refrigerator is a kind of high-end scientific instrument capable of providing near absolute zero low-temperature environment, and is one of the key core equipment of modern quantum scientific research and quantum technology development.As a kind of high-end scientific instrument, the extremely low temperature dilution refrigerator utilizes 3 When He atom flows into dilute phase from concentrated phase through phase interface at extremely low temperature, entropy increases to realize continuous refrigeration in mK temperature zone, and when pump group works, vibration of pump group and airflow is transmitted to thermostat of the extremely low temperature dilution refrigerator, which influences refrigeration effect.Therefore, vacuum pipeline connected with the thermostat needs to be designed with special shock absorption structure.

[0003] At present, there are many methods for shock absorption, and spring, rubber and other structures are often used, but the shock absorption effect of these structure methods applied in vacuum pipeline is general, and spring and rubber shock absorption can only absorb vibration frequency in low frequency range, and cannot realize shock absorption in wider vibration frequency range.For the high-end precise scientific instrument such as the extremely low temperature dilution refrigerator, the requirement for vibration isolation often exceeds that of general equipment, and ordinary shock absorption method cannot achieve ideal effect. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a shock absorption vacuum bellows structure, which effectively solves the problem that there is no shock absorption structure capable of realizing shock absorption in wider vibration frequency range beyond low frequency range.

[0005] To solve the above technical problems, the utility model adopts the technical scheme that

[0006] A shock absorption vacuum bellows structure, comprising a vacuum bellows, one wave tube flange is arranged at the upper end and the lower end of the vacuum bellows respectively, a plurality of adjusting screw and nut assemblies for adjusting the height of the vacuum bellows are uniformly arranged on the wave tube flange along the circumferential direction, and a plurality of flexible liquid damping structures are uniformly arranged on the circumferential direction of the vacuum bellows.

[0007] The flexible liquid damping structure comprises a closed flexible shell, damping medium is arranged in the flexible shell, one connecting flange is arranged at the upper end and the lower end of the flexible shell respectively, and the connecting flanges and adjacent wave tube flanges are connected through screws.

[0008] Further, the damping medium is water.

[0009] Further, the material of the flexible shell is rubber.

[0010] Further, the adjusting screw and nut assembly is composed of adjusting screw and adjusting nut, the adjusting screw and adjusting nut are connected through thread cooperation, the lower end of the adjusting screw passes through the bellows flange at the lower end of the vacuum bellows, and the upper end of the adjusting screw passes through the bellows flange at the upper end of the vacuum bellows.

[0011] Further, two adjusting nuts are arranged on each adjusting screw, the bottom end of one adjusting nut is connected with the top end surface of the bellows flange at the upper end of the vacuum bellows, and the bottom end of the other adjusting nut is connected with the top end surface of the bellows flange at the lower end of the vacuum bellows.

[0012] Further, the adjusting screw and nut assembly has four groups in total.

[0013] Further, the flexible liquid damping structure has four groups, and one flexible liquid damping structure is arranged between every two adjacent adjusting screw and nut assemblies.

[0014] Further, the flexible shell is arc-shaped.

[0015] Further, the middle part of the connecting flange is provided with a first threaded hole, the bellows flange adjacent to the connecting flange is provided with a second threaded hole, and the position of the first threaded hole and the position of the second threaded hole are opposite.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] The utility model discloses a flexible liquid damping structure, and the flexible liquid damping structure is connected together through the connecting flange and the bellows flange of the vacuum bellows, and forms a damping assembly with the vacuum bellows. When vibration is transmitted, the damping medium in the flexible liquid damping structure can absorb vibration and increase damping. The utility model can be applied to low-frequency range and a wider vibration frequency range outside the low-frequency range, has simple structure, high modular degree and easy installation. The utility model is applied to the vacuum pipeline of the extremely low temperature dilution refrigerator, and the damping effect of the vacuum pipeline can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the exploded view of the utility model.

[0019] Figure 2 It is the front view of the utility model.

[0020] Mark explanation: vacuum bellows-1;Bellows flange-2;Flexible liquid damping structure-3;Flexible shell-4;Connecting flange-5;Screw-6;Adjusting screw-7;Adjusting nut-8;First threaded hole-9;Second threaded hole-10. DETAILED DESCRIPTION

[0021] Embodiment 1: a shock-absorbing vacuum bellows structure, as shown in Figure 1 and Figure 2 shown, comprising a vacuum bellows 1, the upper and lower ends of the vacuum bellows 1 are respectively provided with a bellows flange 2, the bellows flange 2 is uniformly provided with four groups of adjusting screw and nut assemblies for adjusting the height of the vacuum bellows 1 along the circumferential direction, the circumferential direction of the vacuum bellows 1 is uniformly provided with four flexible liquid damping structures 3, and one flexible liquid damping structure 3 is arranged between every two adjacent adjusting screw and nut assemblies.

[0022] The flexible liquid damping structure 3 comprises a closed arc-shaped flexible shell 4, the inside of the flexible shell 4 is provided with damping medium, and the upper and lower ends of the flexible shell 4 are respectively provided with a connecting flange 5, and the connecting flange 5 and the bellows flange 2 adjacent to the connecting flange 5 are connected through a screw 6. In the embodiment, the flexible shell 4 is made of rubber material, and the damping medium is water.

[0023] In the embodiment, the adjusting screw and nut assembly is composed of an adjusting screw 7 and an adjusting nut 8, and the adjusting screw 7 and the adjusting nut 8 are connected through thread cooperation. The lower end of the adjusting screw 7 penetrates the bellows flange 2 located at the lower end of the vacuum bellows 1, and the upper end of the adjusting screw 7 penetrates the bellows flange 2 located at the upper end of the vacuum bellows 1. Two adjusting nuts 8 are arranged on each adjusting screw 7, one bottom end of the adjusting nuts 8 is connected with the top end surface of the bellows flange 2 located at the upper end of the vacuum bellows 1, and the other bottom end of the adjusting nuts 8 is connected with the top end surface of the bellows flange 2 located at the lower end of the vacuum bellows 1. Through the cooperation of the adjusting nut 8 and the adjusting screw 7, the height of the vacuum bellows 1 can be adjusted, so as to adapt to the assembly size and achieve the optimal shock-absorbing effect.

[0024] In the embodiment, the middle part of the connecting flange 5 is provided with a first threaded hole 9, the bellows flange 2 adjacent to the connecting flange 5 is provided with a second threaded hole 10, the positions of the first threaded hole 9 and the second threaded hole 10 are opposite, so that the screw 6 penetrates the second threaded hole 10 and the first threaded hole 9 in sequence, and the connecting flange 5 and the bellows flange 2 adjacent to the connecting flange 5 are connected together.

[0025] The working principle of the utility model is: the outside of the flexible liquid damping structure 3 is a rubber flexible shell, and the inside is water, when vibration is transmitted, the water in the flexible liquid damping structure 3 can absorb vibration and increase damping effect. Vibration is essentially a kind of energy, and the flexible liquid damping structure 3 can absorb energy to achieve the effect of shock absorption. The upper and lower ends of the flexible shell 4 are both provided with a connecting flange 5, which is connected with the bellows flange 2 of the vacuum bellows 1 to form a shock-absorbing assembly. The utility model is applied to the vacuum pipeline of a cryogenic dilution refrigerator to realize the shock-absorbing effect of the vacuum pipeline.

[0026] The shock-absorbing vacuum corrugated pipe structure can be applied to shock absorption of a wider vibration frequency range including a low frequency range and outside the low frequency range, has a simple structure, high modularization degree and is easy to install.

[0027] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by the skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A shock absorbing vacuum bellows structure, characterized by, The vacuum bellows comprises upper and lower ends each provided with a bellows flange, and a plurality of groups of adjusting screw and nut assemblies for adjusting the height of the vacuum bellows are uniformly arranged on the circumferential direction of the bellows flange, and a plurality of flexible liquid damping structures are uniformly arranged on the circumferential direction of the vacuum bellows. The flexible liquid damping structure comprises a closed flexible shell, the inside of the flexible shell is provided with damping medium, and the upper and lower ends of the flexible shell are each provided with a connecting flange, and the connecting flange and the adjacent bellows flange are connected through screws.

2. The shock-absorbing vacuum bellows structure according to claim 1, characterized in that, The damping medium is water.

3. The shock-absorbing vacuum bellows structure according to claim 2, characterized in that, The material of the flexible shell is rubber.

4. The shock-absorbing vacuum bellows structure according to claim 3, characterized in that, The adjusting screw and nut assembly is composed of an adjusting screw and an adjusting nut, the adjusting screw and the adjusting nut are connected through thread cooperation, the lower end of the adjusting screw passes through the bellows flange at the lower end of the vacuum bellows, and the upper end of the adjusting screw passes through the bellows flange at the upper end of the vacuum bellows.

5. The shock-absorbing vacuum bellows structure according to claim 4, characterized in that, Two adjusting nuts are arranged on each adjusting screw, one adjusting nut is connected with the top end surface of the bellows flange at the upper end of the vacuum bellows, and the other adjusting nut is connected with the top end surface of the bellows flange at the lower end of the vacuum bellows.

6. The shock-absorbing vacuum bellows structure according to claim 5, characterized in that, There are four groups of adjusting screw and nut assemblies in total.

7. The shock-absorbing vacuum bellows structure according to claim 6, characterized by There are four flexible liquid damping structures, and one flexible liquid damping structure is arranged between every two adjacent adjusting screw and nut assemblies.

8. The shock-absorbing vacuum bellows structure according to claim 7, characterized by The flexible shell is arc-shaped.

9. The shock-absorbing vacuum bellows structure according to claim 8, characterized in that, The middle part of the connecting flange is provided with a first threaded hole, the bellows flange adjacent to the connecting flange is provided with a second threaded hole, and the positions of the first threaded hole and the second threaded hole are opposite.

Images