Low-vibration liquid-nitrogen-free high-temperature superconducting interferometer assembly

Abstract

The invention provides a low-vibration liquid-nitrogen-free high-temperature superconducting interferometer assembly, and the assembly comprises an upper frame which is used for installing a compressor of a refrigerating machine; the lower frame is used for mounting the high-temperature superconducting interferometer; the middle frame is used for mounting a hose, a cold finger and a cold chain of the refrigerator; wherein the cold chain is used for conveying cold energy generated by the refrigerating machine to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are sequentially connected from top to bottom; at least one of the two ends of the fixing rods in the upper frame and the middle frame is provided with a vibration isolation pad. And the at least two interferometer cold screens are arranged in the lower frame, one interferometer cold screen is arranged outside the high-temperature superconducting interferometer in a sleeving manner, and the other interferometer cold screens are sequentially arranged outside the corresponding interferometer cold screens in a sleeving manner. According to the invention, the high integration level and uninterrupted work of the whole assembly can be realized, and the influence of the vibration of the refrigerating machine compressor and the refrigerating machine cold finger on the detection performance of the high-temperature superconducting interferometer can be effectively isolated.

Description

Technical Field

[0001] The present application relates to the technical field of low-temperature refrigeration equipment, in particular to the technical field of superconducting low-temperature measurement, and specifically to a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component. Background Art

[0002] At present, the low-temperature working environment of the high-temperature superconducting quantum interference device is provided by liquid nitrogen. During operation, a large amount of liquid nitrogen will be lost. After the liquid nitrogen is exhausted, the interferometer cannot work, that is, the components cannot work continuously for a long time. At the same time, the vacuum of the Dewar of the high-temperature superconducting quantum interference device with this structure needs regular maintenance, which increases the cost of using the components.

[0003] Based on this, industry technicians combined the refrigerator with the high-temperature superconducting quantum interference device. It is not difficult to understand that the refrigerator can ensure the long-term uninterrupted operation of the high-temperature superconducting interferometer, but the refrigerator will inevitably vibrate during operation. Specifically, after the superconducting quantum interference device is integrated with the refrigerator, the vibration of the refrigerator's cold finger will introduce errors in the measurement direction of the interferometer, causing additional noise and reducing the sensitivity of the interferometer, thereby affecting the measurement accuracy. At the same time, the existing superconducting quantum interference device component structure and size are relatively large, which limits the portable use and application scenarios of the component. Summary of the invention

[0004] The present invention provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer component to solve the problem that the existing high-temperature superconducting interferometer component cannot work for a long time in a low-temperature working environment, and greatly reduces the vibration problem caused by the introduction of a refrigerator.

[0005] In order to solve at least one of the above problems existing in the prior art, an embodiment of the present application provides a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component.

[0006] According to an embodiment of the present application, the present application provides a low-vibration liquid nitrogen-free high-temperature superconducting interferometer component, including: a refrigerator and a high-temperature superconducting interferometer. Further, the component also includes:

[0007] An upper frame, used for mounting a compressor of the refrigerator;

[0008] A lower frame, used for installing the high temperature superconducting interferometer;

[0009] The middle frame is used to install the hose, cold finger and cold chain of the refrigerator; wherein the cold chain is used to transport the cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are connected in sequence from top to bottom; at least one end of the two ends of the fixing rods in the upper frame and the middle frame is provided with a vibration isolation pad;

[0010] A cold finger mounting plate is arranged inside the middle frame, the cold finger mounting plate is connected to the bottom of the middle frame through a cold finger mounting plate support rod, and at least one end of the two ends of the cold finger mounting plate support rod is provided with a vibration isolation pad; the cold finger passes through the cold finger mounting plate, and transmits the cold energy to the high temperature superconducting interferometer through the cold chain;

[0011] At least two interferometer cold shields are arranged inside the lower frame, one of which is sleeved outside the high-temperature superconducting interferometer, and the remaining interferometer cold shields are sequentially sleeved outside the corresponding interferometer cold shields; and

[0012] A bellows is arranged between the cold finger mounting plate and the bottom of the middle frame and is sleeved on the outside of the cold chain to form a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and to reduce the vibration of the cold finger to the vacuum space.

[0013] In some embodiments of the present application, a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0014] The compressor mounting plate is used to mount the compressor to the upper support plate of the upper frame, and a vibration isolation pad is arranged between the compressor mounting plate and the upper support plate of the upper frame.

[0015] In some embodiments of the present application, the hose passes through the lower support plate of the upper frame; and

[0016] The compressor is connected to the cold finger through the hose.

[0017] In some embodiments of the present application, the cold chain includes a flexible cold chain and a detachable columnar cold chain;

[0018] One end of the flexible cold chain is connected to the cold finger, and the other end is connected to one end of the detachable columnar cold chain, and the other end of the detachable columnar cold chain is connected to the high-temperature superconducting interferometer.

[0019] In some embodiments of the present application, a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0020] A cold platform, arranged at the junction of the flexible cold chain and the detachable columnar cold chain in the lower frame;

[0021] The cold platform support rod is arranged between the bottom of the middle frame and the cold platform, and is used to support the cold platform.

[0022] In some embodiments of the present application, a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0023] The cold chain cold shield is arranged between the cold finger mounting plate and the cold platform, and is sleeved on the outside of the cold finger and the outside of the flexible cold chain.

[0024] In some embodiments of the present application, a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0025] The interferometer mounting platform is arranged at the bottom of the detachable columnar cold chain and is used for mounting at least one high-temperature superconducting interferometer and an interferometer cold shield sleeved on the outside of the high-temperature superconducting interferometer.

[0026] In some embodiments of the present application, the remaining interferometer cold shields are sequentially mounted on the outside of the corresponding interferometer cold shields through the cold platform.

[0027] In some embodiments of the present application, the bellows is located inside the cold finger mounting plate support rod relative to the middle frame.

[0028] In some embodiments of the present application, the outer diameter of the bellows and its flange is smaller than the diameter of the support rod of the cold finger mounting plate.

[0029] From the above description, it can be seen that an embodiment of the present invention provides a low-vibration, liquid nitrogen-free, high-temperature superconducting interferometer assembly, including: a refrigerator and a high-temperature superconducting interferometer, an upper frame for installing a compressor of the refrigerator; a lower frame for installing the high-temperature superconducting interferometer; a middle frame for installing a hose, a cold finger and a cold chain of the refrigerator; wherein the cold chain is used to transport the cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are connected in sequence from top to bottom; at least one end of the two ends of the fixing rods in the upper frame and the middle frame is provided with a seismic isolation pad; a cold finger mounting plate is provided inside the middle frame, and the cold finger mounting plate is connected through the cold finger mounting plate The plate support rod is connected to the bottom of the middle frame, and at least one of the two ends of the cold finger mounting plate support rod is provided with a seismic isolation pad; the cold finger passes through the cold finger mounting plate, and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain; at least two interferometer cold screens are arranged inside the lower frame, one of which is mounted on the outside of the high-temperature superconducting interferometer, and the other interferometer cold screens are sequentially mounted on the outside of the corresponding interferometer cold screens; and a bellows is provided between the cold finger mounting plate and the bottom of the middle frame, and is mounted on the outside of the cold chain, which is used to form a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and reduce the vibration of the cold finger to the vacuum space.

[0030] The present invention provides a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component, which is integrated with a refrigerator to achieve high integration and uninterrupted operation of the overall component. In addition, the vibration isolation structure design can effectively isolate the influence of the refrigerator compressor and refrigerator cold finger vibration on the detection performance of the high-temperature superconducting interferometer, thereby achieving continuous high-performance detection of the high-temperature superconducting interferometer component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0032] Figure 1 This is a schematic cross-sectional structure diagram of a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly according to an embodiment of the present application (the cross section is located on the side).

[0033] Figure 2 Schematic diagram of the shape of the vacuum space in an embodiment of the present application.

[0034] Figure 3 This is a schematic diagram of the appearance of a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component according to a specific application example of the present application.

[0035] Figure 4 For specific application examples of this application Figure 1 Schematic diagram of the enlarged structure of part B.

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of a dismantled detachable columnar cold chain component for a specific application example of the present application.

[0037] Reference numerals:

[0038] 1: Upper support plate of upper frame I; 2: Vibration isolation pad (matching with compressor mounting plate 3); 3: Compressor mounting plate; 4: Fixed rod of upper frame I; 4-1: Vibration isolation pad (matching with fixed rod 4); 5: Compressor; 6: Hose; 7: Lower support plate of upper frame I; 8: Vibration isolation pad (matching with fixed rod 9 of middle frame II); 9: Fixed rod of middle frame II; 10: Cold finger; 11: Cold finger mounting plate; 12: Vibration isolation pad (matching with support rod 13 of cold finger mounting plate ); 13: cold finger mounting plate support rod; 14: bellows; 15: bottom of frame II (lower support plate of middle frame II); 16: vibration isolation pad (matching with cold platform support rod 19); 17: cold chain cold screen; 18: flexible cold chain; 19: cold platform support rod; 20: cold platform; 21: secondary cold screen; 22: removable columnar cold chain; 23: interferometer mounting platform; 24: high temperature superconducting interferometer; 25: primary cold screen; 26: lower frame III housing; and

[0039] I: upper frame; II: middle frame; III: lower frame; IV: vacuum space. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0041] It should be noted that the terms "including" and "having" in the specification and claims of the present application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] The superconducting quantum interference device is a magnetically sensitive element. It is a core device used in weak magnetic field measurement, mineral detection, medical and other fields. It must work in a low-temperature environment. With the development of materials science and material preparation technology, the operating temperature of the superconducting quantum interference device has been increased from 4.2K to 77K, which greatly reduces the demand for a low-temperature working environment during the operation of the superconducting quantum interference device. In the prior art, the above-mentioned low-temperature environment can be provided in two ways: the first is to use a refrigerant to directly cool the interferometer by transporting liquid nitrogen to the vicinity of the interferometer; the second is to use a refrigerator, which is directly integrated with the interferometer through the refrigerator.

[0043] The patent with publication number CN112731513B provides a refrigerator vibration reduction structure; the patent with publication number CN115711359A provides a zero-evaporation liquid nitrogen storage tank suitable for pure germanium detection. In both patents, the detector is immersed in liquid nitrogen. In order to reduce the loss of liquid nitrogen, a refrigerator is used to cool the liquid nitrogen container to achieve continuous operation of the components for a long time. However, liquid nitrogen will still be lost during use, and the refrigerator cold head is placed in a vacuum environment, which requires strict maintenance of a large-scale vacuum environment.

[0044] The patent with publication number CN117824237A provides a liquid helium Dewar micro-perturbation zero-volatile cooling system, which immerses the superconducting quantum interferometer in liquid helium and uses a refrigerator to cool the liquid helium to achieve a closed cycle. Although the system spatially isolates the interferometer and the refrigerator, the system only has vibration isolation design between the refrigerator cold finger and the mounting plate. The interferometer is not designed for vibration isolation, and environmental vibrations will still be transmitted to the interferometer, thereby affecting detection.

[0045] The patent with publication number CN105571190B provides a mechanical vibration isolation and non-liquid helium consumption ultra-low temperature refrigeration system; the patent with publication number CN109654786B provides a low vibration cooling device using a closed cycle refrigerator; the patent with publication number CN112963498B provides a 10nm-level liquid helium-free ultra-low temperature vibration reduction system. The above patents all use a solution combining an external circulating liquid helium system with a cryogenic refrigerator to achieve deep low temperatures, and the vibration reduction is mostly focused on the refrigerator and system-level vibration reduction, and the vibration reduction design of the core components of concern is rarely mentioned.

[0046] The patent with publication number CN111089436A provides a low-vibration low-temperature magnetic field measurement device based on GM refrigerator cooling. It adopts a closed liquid helium cycle in a vacuum chamber combined with a deep cryogenic refrigerator for cooling, and reduces the influence of the refrigerator on the vibration of the sample rod through spatial separation. However, the sample rod itself lacks vibration isolation measures.

[0047] Based on this, and in order to solve at least one of the above-mentioned problems existing in the prior art, an embodiment of the present application provides a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component. Figure 1 A schematic diagram of a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly according to an embodiment of the present application. Figure 1 As shown, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly comprises:

[0048] Refrigerator and high temperature superconducting interferometer 24;

[0049] Upper frame I( Figure 1 In the red dotted box), a compressor 5 for installing the refrigerator is provided;

[0050] Lower Frame III( Figure 1 The blue dotted box is used to install the high temperature superconducting interferometer 24;

[0051] Middle Frame II( Figure 1 The upper frame I, the middle frame II and the lower frame III are connected in sequence from top to bottom; at least one end of the fixing rods (4, 9) in the upper frame I and the middle frame II is provided with a vibration isolation pad;

[0052] Preferably, the number of fixing rods 4 of the upper frame I is 4-8, preferably 4, and the preferred material is non-magnetic austenitic stainless steel or aluminum alloy. The number of fixing rods 9 of the middle frame II is 4-8, preferably 4, and the preferred material is polyester glass fiber reinforced material.

[0053] A cold finger mounting plate 11 is arranged inside the middle frame II, and the cold finger mounting plate 11 is connected to the bottom 15 of the middle frame II through a cold finger mounting plate support rod 13, and at least one end of the two ends of the cold finger mounting plate support rod 13 is provided with a vibration isolation pad; the cold finger 10 passes through the cold finger mounting plate 11, and transmits the cold energy to the high temperature superconducting interferometer 24 through the cold chain;

[0054] Preferably, the number of the cold finger mounting plate support rods 13 is 4-8, preferably 4, and the preferred material is polyester glass fiber reinforced material.

[0055] At least two interferometer cooling screens ( Figure 1 There are two interferometer cold screens in the lower frame III, namely, a primary cold screen 25 and a secondary cold screen 21, which are arranged inside the lower frame III. One of the interferometer cold screens 25 (i.e., the primary cold screen 25) is sleeved outside the high-temperature superconducting interferometer 24, and the remaining interferometer cold screens are sequentially sleeved outside the corresponding interferometer cold screens ( Figure 1 The secondary cold shield 21 is set outside the primary cold shield 25); and

[0056] A corrugated tube 14 is provided between the cold finger mounting plate 11 and the bottom 15 of the middle frame II and is sleeved on the outside of the cold chain ( Figure 1 The cross-sectional view of the side of the low-vibration liquid nitrogen-free high-temperature superconducting interferometer component is shown in FIG. 1 , so in the top view, the bellows 14 is a ring), which is used to be airtightly connected with the cold finger mounting plate 11, the bottom 15 of the middle frame and the lower frame III to form a vacuum space IV (such as Figure 1 As shown in the purple dotted box, it should be pointed out that, in order to facilitate the distinction and clarity of the drawing, the purple dotted box has a little gap with the adjacent wall, but in fact, the vacuum space is bounded by the wall. In addition, the overall shape of the purple dotted box can be seen in Figure 2 ,), and reducing the vibration of the cold finger 10 to the vacuum space IV.

[0057] Continue to see Figure 1 In some embodiments of the present application, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0058] The compressor mounting plate 3 is used to mount the compressor 5 to the upper support plate 1 of the upper frame 1, and a vibration isolation pad 2 is provided between the compressor mounting plate 3 and the upper support plate 1 of the upper frame 1. Thus, the compressor mounting plate 3 is mounted on the upper support plate 1 of the upper frame 1 through the vibration isolation pad 2. In addition, the number of the vibration isolation pads 2 is 4-8, preferably 4, evenly distributed on the compressor mounting plate 3, and the preferred material of the vibration isolation pads 2 is silicone.

[0059] Furthermore, only the upper end of the fixing rod 4 is connected to the upper support plate 1 through the vibration isolation pad 4 - 1 , that is, the number of the vibration isolation pads 4 - 1 is consistent with the number of the fixing rods 4 , preferably four.

[0060] Vibration isolation pads 8 are installed at both ends of the fixing rods 9 of the middle frame II, that is, the number of vibration isolation pads 8 is twice the number of fixing rods 9, and the material of the vibration isolation pads 8 is preferably butadiene rubber (BR).

[0061] Vibration isolation pads 12 are respectively installed at both ends of the cold finger mounting plate support rod 13, that is, the number of vibration isolation pads 12 is twice the number of cold finger mounting plate support rods 13, and the material of the vibration isolation pads 12 is preferably butadiene rubber (BR).

[0062] Continue to see Figure 1 In some embodiments of the present application, the hose 6 passes through the lower support plate 7 of the upper frame 1; and the compressor 5 is connected to the cold finger 10 through the hose 6. That is, a through hole is provided in the lower support plate 7 of the upper frame 1 for the hose 6 to pass through.

[0063] Continue to see Figure 1 In some embodiments of the present application, the cold chain includes a flexible cold chain 18 and a detachable columnar cold chain 22; the material of the flexible cold chain 18 is preferably oxygen-free copper or high-purity aluminum.

[0064] One end of the flexible cold chain 18 is connected to the cold finger 10 , and the other end is connected to one end of the detachable columnar cold chain 22 . The other end of the detachable columnar cold chain 22 is connected to the high-temperature superconducting interferometer 24 .

[0065] Continue to see Figure 1 In some embodiments of the present application, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0066] A cold platform 20, arranged at the junction of the flexible cold chain 18 and the detachable columnar cold chain 22 in the lower frame III;

[0067] The cold platform support rod 19 is disposed between the bottom 15 of the middle frame II (ie, the lower support plate of the middle frame II) and the cold platform 20 to support the cold platform 20.

[0068] Furthermore, a vibration isolation pad 16 is provided between the cold platform support rod 19 and the bottom 15 of the middle frame II, and the material of the vibration isolation pad 16 is silicone.

[0069] Continue to see Figure 1 In some embodiments of the present application, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0070] The cold chain cold shield 17 is arranged between the cold finger mounting plate 11 and the cold platform 20, and is sleeved outside the cold finger 10 and outside the flexible cold chain 18. That is, the flexible cold chain 18 is installed in the cold chain cold shield 17, and the two ends of the flexible cold chain 18 are respectively connected to the cold finger 10 and the cold platform 20.

[0071] It can be understood that the above-mentioned arrangement of the cold chain cold shield 17 requires that a through hole be provided at the bottom 15 of the middle frame II, and the outer diameter of the cold chain cold shield 17 is smaller than the radius of the through hole.

[0072] Continue to see Figure 1 In some embodiments of the present application, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly further includes:

[0073] The interferometer mounting platform 23 is arranged at the bottom of the detachable columnar cold chain 22 and is used to install at least one high-temperature superconducting interferometer 24 and an interferometer cold shield 25 (i.e., a primary cold shield 25) sleeved on the outside of the high-temperature superconducting interferometer 24.

[0074] On the basis of the above embodiment, the remaining interferometer cold shields are sequentially mounted on the outside of the corresponding interferometer cold shields through the cold platform (in order of Figure 1 For example, the number of interferometer cold screens is two, and the secondary cold screen 21 is set outside the primary cold screen 25).

[0075] Specifically, the secondary cold shield 21 is installed on the periphery of the cold platform 20, enveloping the detachable columnar cold chain 22 and the components installed thereon. The detachable columnar cold chain 22 can be removed according to the use conditions, and the interferometer mounting platform 23 fixed with the high-temperature superconducting interferometer 24 and the primary cold shield 25 can be directly installed on the cold platform 20.

[0076] Continue to see Figure 1 In some embodiments of the present application, the bellows 14 is located inside the cold finger mounting plate support rod 13 relative to the middle frame II.

[0077] In some embodiments of the present application, the outer diameter of the bellows 14 and its flange is smaller than the diameter (installation size diameter) of the cold finger mounting plate support rod 13. The upper and lower ends of the bellows 14 are respectively connected to the cold finger mounting plate 11 and the bottom 15 of the middle frame II.

[0078] From the above description, it can be seen that an embodiment of the present invention provides a low-vibration, liquid nitrogen-free, high-temperature superconducting interferometer assembly, including: a refrigerator and a high-temperature superconducting interferometer, an upper frame for installing a compressor of the refrigerator; a lower frame for installing the high-temperature superconducting interferometer; a middle frame for installing a hose, a cold finger and a cold chain of the refrigerator; wherein the cold chain is used to transport the cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are connected in sequence from top to bottom; at least one end of the two ends of the fixing rods in the upper frame and the middle frame is provided with a seismic isolation pad; a cold finger mounting plate is provided inside the middle frame, and the cold finger mounting plate is connected through the cold finger mounting plate The plate support rod is connected to the bottom of the middle frame, and at least one of the two ends of the cold finger mounting plate support rod is provided with a seismic isolation pad; the cold finger passes through the cold finger mounting plate, and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain; at least two interferometer cold screens are arranged inside the lower frame, one of which is mounted on the outside of the high-temperature superconducting interferometer, and the other interferometer cold screens are sequentially mounted on the outside of the corresponding interferometer cold screens; and a bellows is provided between the cold finger mounting plate and the bottom of the middle frame, and is mounted on the outside of the cold chain, which is used to form a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and reduce the vibration of the cold finger to the vacuum space.

[0079] The low-vibration liquid nitrogen-free high-temperature superconducting interferometer component provided by the present invention, firstly, does not require liquid nitrogen during operation, and a refrigerator is used to provide cooling for the high-temperature superconducting interferometer to achieve long-term uninterrupted operation of the interferometer, and the component has a smaller size and is more applicable; finally, the component achieves low vibration of the component through a mechanical vibration isolation structure, thereby achieving high-sensitivity detection of the interferometer.

[0080] In order to further illustrate the solution, the present invention also provides a specific application example of a low-vibration, liquid nitrogen-free high-temperature superconducting interferometer component.

[0081] like Figure 1 as well as Figure 3As shown, a low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly includes: an upper support plate 1 of an upper frame I, a vibration isolation pad 2 (matched with a compressor mounting plate 3), a compressor mounting plate 3, a fixing rod 4 of the upper frame I, a vibration isolation pad 4-1 (matched with the fixing rod 4), a compressor 5, a hose 6, a lower support plate 7 of the upper frame I, a vibration isolation pad 8 (matched with a fixing rod 9 of a middle frame II), a fixing rod 9 of a middle frame II, a cold finger 10, a cold finger mounting plate 11, and a vibration isolation pad 12. (matching with the cold finger mounting plate support rod 13), the cold finger mounting plate support rod 13, the bellows 14, the bottom 15 of the middle frame II (the lower support plate of the middle frame II), the vibration isolation pad 16 (matching with the cold platform support rod 19), the cold chain cold shield 17, the flexible cold chain 18, the cold platform support rod 19, the cold platform 20, the secondary cold shield 21, the detachable columnar cold chain 22, the interferometer mounting platform 23, the high temperature superconducting interferometer 24, the primary cold shield 25 and the lower frame III housing 26. Specifically:

[0082] The upper support plate 1 is the installation reference of the low-vibration liquid nitrogen-free high-temperature superconducting interferometer assembly, and a high Young's modulus material needs to be selected, preferably austenitic stainless steel. The compressor 5 is fixed on the compressor mounting plate 3, and the compressor mounting plate 3 is vibration-insulated and installed on the upper support plate 1 through vibration isolation pads 2 evenly distributed thereon.

[0083] In order to achieve effective heat dissipation of the compressor 5 and ensure the refrigeration efficiency of the refrigerator, the compressor mounting plate 3 is preferably made of aluminum alloy. The vibration transmitted from the compressor 5 to the upper support plate 1 is reduced by using vibration isolation pads 2. The number of vibration isolation pads 2 is 4-8, preferably 4, and the preferred material is silicone.

[0084] Furthermore, the fixing rod 4 is used to connect the upper support plate 1 and the lower support plate 7, and a vibration isolation pad 4-1 is installed between the fixing rod 4 and the upper support plate 1 to reduce the vibration generated by the compressor 5 transmitted along the fixing rod 4 to the lower support plate 7. The number of the fixing rods 4 is 4-8, preferably 4, and the preferred material is non-magnetic austenitic stainless steel or aluminum alloy. The number of the vibration isolation pads 4-1 is consistent with the number of the fixing rods 4, preferably 4, and the preferred material is silicone.

[0085] Vibration isolation pads 8 are installed at both ends of the fixing rods 9 to isolate the lower support plate 7 from the bottom 15 of the middle frame II. The vibrations transmitted by the compressor 5 along the component structure are further reduced by the fixing rods 9 and the vibration isolation pads 8. The number of fixing rods 9 is 4-8, preferably 4, and the preferred material is polyester glass fiber reinforced material. The number of vibration isolation pads 8 is twice the number of outer fixing rods 9, and the preferred material is butadiene rubber (BR).

[0086] The hose 6 passes through the mounting hole on the lower support plate 7 to connect the cold finger 10 to the compressor 5. The refrigerator can be a pulse tube refrigerator or a Stirling refrigerator. The cold finger 10 is connected to the cold finger mounting plate 11. Preferably, the cold finger mounting plate 11 is made of aluminum alloy.

[0087] In order to realize the vacuum and low temperature environment required for the operation of the high temperature superconducting interferometer, the cold finger 10, the cold finger mounting plate 11, the bellows 14, the bottom 15 of the middle frame II and the lower frame III shell 26 are airtightly connected to form a vacuum peripheral space.

[0088] In order to further realize the vibration isolation installation of the cold finger 10 and the high-temperature superconducting interferometer 24, a bellows 14 is used to connect the cold finger mounting plate 11 and the bottom 15 of the middle frame II for vibration isolation, and at the same time provide a vacuum environment for the high-temperature superconducting interferometer 24. A cold finger mounting plate support rod 13 (located on the inner side) and a vibration isolation pad 12 are installed between the cold finger mounting plate 11 and the bottom 15 of the middle frame II and on the periphery of the bellows 14. It can be understood that these vibration isolation designs effectively reduce the vibration transmitted from the cold finger 10 to the bottom 15 of the middle frame II and the high-temperature superconducting interferometer 24.

[0089] The number of the cold finger mounting plate support rods 13 is 4-8, preferably 4, and the preferred material is polyester glass fiber reinforced material. Vibration isolation pads 12 are respectively installed at both ends of the cold finger mounting plate support rods 13, and the number of vibration isolation pads 12 is twice the number of the cold finger mounting plate support rods 13, and the preferred material is butadiene rubber (BR).

[0090] On the basis of the above embodiment, one end of the cold platform support rod 19 is installed on the bottom 15 of the middle frame II through the vibration isolation pad 16, and the other end of the cold platform support rod 19 is connected to and fixed on the cold platform 20, thereby realizing the spatial separation of the cold platform 20 and the cold finger 10, thereby further reducing the influence of the vibration generated by the shaking of the cold finger 10 on the high-temperature superconducting interferometer 24.

[0091] On the other hand, since the operating temperature of the cold platform 20 is 77K or below, and the temperature of the bottom 15 of the middle frame II is 293K, in order to reduce the loss of cooling capacity and the power consumption of the refrigerator, the cold platform support rod 19 is preferably a thin-walled structure, and the material is a glass fiber reinforced composite material with poor thermal conductivity but good rigidity. The preferred material of the vibration isolation pad 16 is silicone.

[0092] The cold chain cold shield 17 is used to reduce the radiation heat leakage of the flexible cold chain 18 and the cold finger 10. The bottom 15 of the middle frame II is provided with a through hole. The cold chain cold shield 17 is installed on the cold platform 20 through the through hole. The outer diameter of the cold chain cold shield 17 is smaller than the radius of the through hole at the bottom 15 of the middle frame II.

[0093] The cold energy is transferred through the flexible cold chain 18, one end of the flexible cold chain 18 is connected to the cold finger 10, and the other end is connected to the cold platform 20. Preferably, the material of the flexible cold chain 18 is oxygen-free copper or high-purity aluminum.

[0094] A secondary cold shield 21 and a detachable columnar cold chain 22 are installed on the cold platform 20; the interferometer mounting platform 23 is connected to the detachable columnar cold chain 22, and a high-temperature superconducting interferometer 24 and a primary cold shield 25 are fixed on the interferometer mounting platform 23. The primary cold shield 25 and the secondary cold shield 21 are used to reduce the radiation heat leakage of the detachable columnar cold chain 22 and the high-temperature superconducting interferometer 24. The secondary cold shield 21 is installed on the periphery of the cold platform 20 to envelop the detachable columnar cold chain 22 and the components installed thereon.

[0095] Figure 4 Shown Figure 1 The details in the figure can more clearly show the relative position relationship and installation method of the lower support plate 15 of the middle frame II, the cold platform support vibration isolation pad 16 and the cold platform support rod 19.

[0096] Figure 5 The cross-sectional structure after the detachable columnar cold chain 22 is removed is shown. It can be seen that the overall structure is Figure 1 similar.

[0097] From the above description, it can be seen that a specific application example of the present invention provides a low-vibration, liquid nitrogen-free, high-temperature superconducting interferometer assembly, including: a refrigerator and a high-temperature superconducting interferometer, an upper frame for installing a compressor of the refrigerator; a lower frame for installing the high-temperature superconducting interferometer; a middle frame for installing a hose, a cold finger and a cold chain of the refrigerator; wherein the cold chain is used to transport the cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are connected in sequence from top to bottom; at least one end of the two ends of the fixing rods in the upper frame and the middle frame is provided with a seismic isolation pad; a cold finger mounting plate is provided inside the middle frame, and the cold finger mounting plate is connected to the cold finger mounting plate through the cold finger mounting plate. The mounting plate support rod is connected to the bottom of the middle frame, and at least one of the two ends of the cold finger mounting plate support rod is provided with a seismic isolation pad; the cold finger passes through the cold finger mounting plate, and transmits the cold energy to the high-temperature superconducting interferometer through the cold chain; at least two interferometer cold screens are arranged inside the lower frame, one of which is sleeved on the outside of the high-temperature superconducting interferometer, and the other interferometer cold screens are sequentially sleeved on the outside of the corresponding interferometer cold screens; and a bellows is arranged between the cold finger mounting plate and the bottom of the middle frame, and is sleeved on the outside of the cold chain, which is used to form a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and reduce the vibration of the cold finger to the vacuum space. Specifically, the present invention has the following beneficial effects:

[0098] 1. The refrigerator compressor is installed on the fixed plate through the vibration isolation pad, which reduces the vibration transmission from the compressor to the upper support plate of the upper frame; further, the vibration isolation pad and the fixing rod of the upper frame reduce the vibration transmission from the upper support plate of the upper frame to the lower support plate of the upper frame.

[0099] 2. In the present invention, a fixing rod and a vibration isolation pad of the middle frame are added to the lower support plate of the upper frame and the lower support plate of the middle frame. While ensuring the rigidity of the mechanical structure, a vibration isolation structure is further added to further reduce the vibration of the compressor transmitted to the lower support plate of the upper frame, thereby reducing the vibration of the vacuum chamber.

[0100] 3. The refrigerator compressor is connected to the cold finger through a hose. After the refrigerator cold finger is fixed to the cold finger mounting plate, the influence of the refrigerator cold finger vibration on the vacuum chamber is further reduced through the bellows, the cold finger mounting plate support rod and the corresponding vibration isolation pad.

[0101] 4. The cold platform and the cold finger of the refrigerator are designed with spatial isolation, and soft connection is used to transfer cold energy, which reduces the influence of the vibration of the cold finger of the refrigerator on the high-temperature superconducting interferometer installed on the cold platform, thereby improving the detection effect.

[0102] 5. The cold platform is fixed by the cold platform support rod, which is fixed to the lower support plate of the middle frame II with multi-stage vibration isolation design through vibration isolation pads, which greatly reduces the vibration introduced into the cold platform, thereby reducing the vibration of the high-temperature superconducting interferometer.

[0103] 6. A highly integrated installation of the refrigerator system and the vacuum chamber is achieved. The high-temperature superconducting interferometer is cooled by the refrigerator, which reduces the size of the system, allows the components to work uninterruptedly, and enables the portable use of the components.

[0104] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0105] The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present invention, and the order of steps therein is not limited and may be appropriately adjusted as needed.

[0106] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0107] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0108] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A low-vibration, liquid nitrogen-free high-temperature superconducting interferometer assembly, comprising: A refrigerator and a high-temperature superconducting interferometer, characterized in that they also include: An upper frame, used for mounting a compressor of the refrigerator; A lower frame, used for installing the high temperature superconducting interferometer; The middle frame is used to install the hose, cold finger and cold chain of the refrigerator; wherein the cold chain is used to transport the cold energy generated by the refrigerator to the high-temperature superconducting interferometer, and the upper frame, the middle frame and the lower frame are connected in sequence from top to bottom; at least one end of the two ends of the fixing rods in the upper frame and the middle frame is provided with a vibration isolation pad; A cold finger mounting plate is arranged inside the middle frame, the cold finger mounting plate is connected to the bottom of the middle frame through a cold finger mounting plate support rod, and at least one end of the two ends of the cold finger mounting plate support rod is provided with a vibration isolation pad; the cold finger passes through the cold finger mounting plate, and transmits the cold energy to the high temperature superconducting interferometer through the cold chain; At least two interferometer cold shields are arranged inside the lower frame, one of which is sleeved outside the high-temperature superconducting interferometer, and the remaining interferometer cold shields are sequentially sleeved outside the corresponding interferometer cold shields; and A bellows is arranged between the cold finger mounting plate and the bottom of the middle frame and is sleeved on the outside of the cold chain to form a vacuum space with the cold finger mounting plate, the bottom of the middle frame and the lower frame, and to reduce the vibration of the cold finger to the vacuum space.

2. The high temperature superconducting interferometer assembly according to claim 1, characterized in that: Also includes: The compressor mounting plate is used to mount the compressor to the upper support plate of the upper frame, and a vibration isolation pad is arranged between the compressor mounting plate and the upper support plate of the upper frame.

3. The high temperature superconducting interferometer assembly according to claim 1, characterized in that: The hose passes through the lower support plate of the upper frame; and The compressor is connected to the cold finger through the hose.

4. The high temperature superconducting interferometer assembly according to claim 1, characterized in that: The cold chain includes a flexible cold chain and a detachable columnar cold chain; One end of the flexible cold chain is connected to the cold finger, and the other end is connected to one end of the detachable columnar cold chain, and the other end of the detachable columnar cold chain is connected to the high-temperature superconducting interferometer.

5. The high temperature superconducting interferometer assembly according to claim 4, characterized in that: Also includes: A cold platform, arranged at the junction of the flexible cold chain and the detachable columnar cold chain in the lower frame; The cold platform support rod is arranged between the bottom of the middle frame and the cold platform, and is used to support the cold platform.

6. The high temperature superconducting interferometer assembly according to claim 5, characterized in that: Also includes: The cold chain cold shield is arranged between the cold finger mounting plate and the cold platform, and is sleeved on the outside of the cold finger and the outside of the flexible cold chain.

7. The high temperature superconducting interferometer assembly according to claim 5, characterized in that: Also includes: The interferometer mounting platform is arranged at the bottom of the detachable columnar cold chain and is used for mounting at least one high-temperature superconducting interferometer and an interferometer cold shield sleeved on the outside of the high-temperature superconducting interferometer.

8. The high temperature superconducting interferometer assembly according to claim 7, characterized in that: The remaining interferometer cold screens are sequentially sleeved on the outside of the corresponding interferometer cold screens through the cold platform.

9. The high temperature superconducting interferometer assembly according to any one of claims 1 to 8, characterized in that: The bellows is located inside the cold finger mounting plate support rod relative to the middle frame.

10. The high temperature superconducting interferometer assembly according to claim 9, characterized in that: The outer diameter of the bellows and its flange is smaller than the diameter of the support rod of the cold finger mounting plate.

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