A superconducting cable with a vacuum degree automatic adjustment device

Abstract

The present invention relates to the field of superconducting transmission technology, and provides a superconducting cable with an automatic vacuum degree adjustment device. The present invention comprises a superconducting cable body and a vacuum insulation layer coated on the outer layer of the superconducting cable body. The tube wall of the vacuum insulation layer is a vacuum structure. The present invention also comprises a vacuum degree adjustment mechanism disposed on the inner wall of the vacuum insulation layer near the superconducting cable body. The vacuum degree adjustment mechanism comprises an electric control system, a gas adsorption chamber, and a vacuum probe. The electric control system is used to control the gas adsorption chamber to adsorb or release gas to adjust the vacuum degree of the vacuum insulation layer. The present invention adjusts the vacuum degree through the vacuum degree adjustment mechanism, and does not require a vacuum pump, making the operation more flexible, avoiding power loss caused by the operation of the vacuum pump, and facilitating maintenance by personnel. The vacuum degree adjustment mechanism is disposed on the inner wall of the vacuum insulation layer near the superconducting cable body, and does not require a separate vacuum pump to occupy a large amount of urban land.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting transmission, in particular to a superconducting cable with an automatic vacuum degree regulating device. Background Art

[0002] High-temperature superconducting cable is a cable facility that uses unobstructed superconducting materials that can transmit high current density as conductors and can transmit large currents. It has the advantages of small size, low cost, high energy saving, and no pollution, and has huge economic and environmental benefits.

[0003] The application temperature range of superconducting tape has been upgraded from liquid helium and liquid hydrogen to liquid nitrogen. Its superconducting critical transition temperature continues to rise year by year, and it is expected to achieve a superconducting state at room temperature. Therefore, excessively high temperatures often cause superconducting tape failures. Currently, the internal cable core of a superconducting cable requires a cryogenic medium to operate normally, and a vacuum environment is required outside the cryogenic medium for protection. The maintenance of the vacuum environment seriously affects the performance of the entire cable. However, the current method for maintaining a vacuum environment in a superconducting cable is to use a vacuum pump to evacuate the air. When the vacuum degree of the vacuum insulation layer of the superconducting cable decreases, an additional vacuum pump is required to evacuate the air. However, in actual use, it has been found that the efficiency of the vacuum pump is low, the pumping speed is slow, and the effect is not ideal. The vacuum pump has low flexibility during use, occupies a large amount of urban land, wastes a lot of electricity when the vacuum pump is turned on, and requires staff to be deployed for on-site maintenance. Summary of the Invention

[0004] In order to solve the problems of inflexible use, large amount of urban land occupation, power loss and high labor cost caused by the use of vacuum pumps, a superconducting cable with an automatic vacuum degree adjustment device is provided.

[0005] A superconducting cable with an automatic vacuum degree adjustment device comprises a superconducting cable body and a vacuum insulation layer coated on the outer layer of the superconducting cable body, wherein the tube wall of the vacuum insulation layer is a vacuum structure, and further comprises a vacuum degree adjustment mechanism arranged on the inner wall of the vacuum insulation layer close to the superconducting cable body, wherein the vacuum degree adjustment mechanism comprises an electric control system, a gas adsorption cabin and a vacuum probe, wherein the electric control system is electrically connected to the gas adsorption cabin and the vacuum probe respectively, wherein the vacuum probe is used to detect the vacuum degree of the vacuum insulation layer, and the electric control system is used to control the gas adsorption cabin to adsorb or release gas to adjust the vacuum degree of the vacuum insulation layer.

[0006] Furthermore, the gas adsorption cabins are provided in plurality, and the gas adsorption cabins are arranged in an array around the axis of the vacuum insulation layer, and the vacuum probes are provided at equal intervals along the axis of the vacuum insulation layer.

[0007] Furthermore, the gas adsorption cabin includes a gas adsorption cabin body and a gas adsorption component, and the gas adsorption component is placed in the gas adsorption cabin body.

[0008] Furthermore, the gas adsorption component includes an adsorbent, a leak-proof layer and a heating component. The adsorbent and the heating component are placed in the gas adsorption cabin. The adsorbent is coated on the outside of the heating component. The heating component is electrically connected to the electronic control system. The leak-proof layer covers the adsorbent. The leak-proof layer is used to block and fix the adsorbent.

[0009] Furthermore, an adjustment door is provided on the upper end surface of the gas adsorption cabin, and a lifting assembly is provided on the lower end surface of the adjustment door. The lifting assembly is fixed in the gas adsorption cabin at one end away from the adjustment door, and the adjustment door is electrically connected to the electric control system.

[0010] Furthermore, the leak-proof layer is a breathable sponge-like structure.

[0011] Furthermore, the adsorbent is a material capable of absorbing and releasing gas.

[0012] Furthermore, the adsorbent is sponge palladium or colloidal palladium.

[0013] Furthermore, the vacuum degree adjustment mechanism also includes a micro-cabin insulation pad, which is placed between the gas adsorption cabin and the inner wall of the vacuum insulation layer close to the superconducting cable body to block the heat energy conduction of the heating component.

[0014] The advantages of the present invention are:

[0015] The vacuum degree adjusting mechanism is electrically connected to the outside to adjust the vacuum degree. There is no need to equip a vacuum pump, which makes the operation more flexible, avoids the power loss caused by the operation of the vacuum pump, and facilitates personnel maintenance. The vacuum degree adjusting mechanism is arranged on the inner wall of the vacuum insulation layer close to the superconducting cable body, and there is no need to set up a separate vacuum pump to occupy a large amount of urban land.

[0016] The gas adsorption chamber array is arranged on the inner wall of the vacuum insulation layer close to the superconducting cable body. Since the superconducting cable usually has a certain length, the array arrangement enables the gas adsorption chamber to be evenly distributed, making it easier to adjust the vacuum degree of the vacuum insulation layer of each part of the superconducting cable, thereby improving the accuracy of vacuum degree adjustment. The vacuum probe converts the vacuum degree of the vacuum insulation layer into an electrical signal through the electronic control system and transmits it to the gas adsorption chamber.

[0017] The gas adsorption cabin is started to adjust the vacuum degree of the vacuum insulation layer, thereby realizing automatic adjustment of the vacuum degree.

[0018] The micro-cabin thermal insulation pad is used to prevent the heat generated by the heating component from being conducted and affecting the low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the inner wall structure of the vacuum insulation layer of the present invention;

[0021] Figure 3 It is a schematic diagram of the electrical connection structure of the vacuum adjustment mechanism of the present invention;

[0022] Figure 4 is a schematic diagram of a gas adsorption capsule array of the present invention;

[0023] Figure 5 This is a schematic diagram of the gas adsorption capsule array of the present invention in use;

[0024] Figure 6 It is a schematic structural diagram of the gas adsorption cabin of the present invention.

[0025] Description of reference numerals:

[0026] 1. Superconducting cable body; 2. Vacuum insulation layer; 3. Vacuum degree adjustment mechanism; 31. Electronic control system; 32. Gas adsorption cabin; 33. Vacuum probe; 34. Micro cabin insulation pad; 321. Gas adsorption cabin body; 322. Gas adsorption assembly; 3211. Adjustment door; 3212. Lifting assembly; 3221. Adsorbent; 3222. Leakage-proof layer; 3223. Heating assembly. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that the various installation methods and technical terms mentioned in this invention are well-known technical terms in the relevant technical field and therefore will not be further explained. In addition, the same reference numerals are used for the same components, but this does not affect nor constitute an accurate understanding of the technical solution by those skilled in the art. Example

[0029] Combine Figure 1 To explain:

[0030] A superconducting cable with an automatic vacuum adjustment device includes a superconducting cable body 1 and a vacuum insulation layer 2 coated on the outer layer of the superconducting cable body 1. The tube wall of the vacuum insulation layer 2 is a vacuum structure. It also includes a vacuum adjustment mechanism 3. The vacuum adjustment mechanism 3 is arranged on the inner wall of the vacuum insulation layer 2 near the superconducting cable body 1. The vacuum adjustment mechanism 3 includes an electric control system 31, a gas adsorption cabin 32 and a vacuum probe 33. The electric control system 31 is electrically connected to the gas adsorption cabin 32 and the vacuum probe 33 respectively. The electric control system 31 is a prior art and will not be described in detail. The vacuum probe 33 is used to detect the vacuum degree of the vacuum insulation layer 2. By setting the vacuum probe 33, the vacuum degree can be automatically adjusted, which is convenient for maintenance. The electric control system 31 is used to control the gas adsorption cabin 32 to adsorb or release gas to adjust the vacuum degree of the vacuum insulation layer 2.

[0031] A vacuum probe 33 detects the vacuum level of the vacuum insulation layer 2 and transmits a corresponding electrical signal to the electronic control system 31, which controls the opening and closing of the gas adsorption chamber 32. The gas adsorption chamber 32 absorbs ambient gas to increase the vacuum level or releases the absorbed gas to reduce the vacuum level. This technical solution eliminates the need for an external vacuum pump, making operation more flexible, avoiding the energy loss associated with the operation of the vacuum pump and the significant urban land occupation associated with a separate vacuum pump, and facilitating maintenance.

[0032] Example 1: Combination Figures 2 to 5 To explain:

[0033] The gas adsorption chambers 32 are provided in a plurality and are arranged in an array around the axis of the vacuum insulation layer (2). Since the superconducting cable usually has a certain length, the array arrangement enables the gas adsorption chambers 32 to be evenly distributed, which facilitates the adjustment of the vacuum degree of the vacuum insulation layer 2 of each part of the superconducting cable; the vacuum probes 33 are arranged at equal intervals along the axis of the vacuum insulation layer (2).

[0034] Combine Figure 5 To illustrate, when the vacuum degree needs to be adjusted, the arrayed gas adsorption cabins 32 can be selectively opened to further save energy. Figure 5 The black gas adsorption cabin 32 is the gas adsorption cabin 32 in the open state. The gas adsorption cabin 32 can be opened regularly, or the gas adsorption cabins in the same area can be opened at the same time. Figure 5 Other arrangements not shown in the figure that are suitable for actual vacuum adjustment requirements are used to open the corresponding gas adsorption cabin 32.

[0035] Example 2: Combination Figure 6 To explain:

[0036] The gas adsorption cabin 32 includes a gas adsorption cabin body 321 and a gas adsorption assembly 322 . The gas adsorption assembly 322 is placed in the gas adsorption cabin body 321 . The gas adsorption assembly 322 adjusts the vacuum degree of the vacuum insulation layer 2 by absorbing or releasing gas.

[0037] The upper end of the gas adsorption chamber 321 is equipped with an adjustable door 3211, and the lower end of the adjustable door 3211 is equipped with a lifting assembly 3212. The end of the lifting assembly 3212, away from the adjustable door 3211, is fixed within the gas adsorption chamber 321. The lifting assembly 3212 can be raised and lowered, raising the adjustable door 3211 to open it, and lowering it to close it. The adjustable door 3211 is electrically connected to the electronic control system 31. The electronic control system 31 transmits electrical signals via a vacuum probe 33 to control the opening and closing of the adjustable door 3211. When the vacuum level falls below or rises above a set threshold, indicating that the vacuum level needs to be adjusted, the electronic control system 31 controls the lifting assembly 3212 to open the adjustable door 3211.

[0038] The gas adsorption assembly 322 includes an adsorbent 3221, a leakproof layer 3222, and a heating assembly 3223. The adsorbent 3221 and heating assembly 3223 are placed in the gas adsorption chamber 321. The adsorbent 3221 is coated on the outside of the heating assembly 3223. The heating assembly 3223 is electrically connected to the electronic control system 31. The leakproof layer 3222 covers the adsorbent 3221 and is used to block and fix the adsorbent 3221. The leakproof layer (3222) is a breathable sponge-like structure. The adsorbent 3221 is a material capable of absorbing and releasing gas. When adjusting the vacuum degree, the electronic control system 31 opens the adjustment door 3211 to allow the adsorbent 3221 to contact the gas in the vacuum insulation layer 2. When the vacuum degree needs to be increased, the adsorbent 3221 increases the vacuum degree by absorbing the gas in the vacuum insulation layer 2; when the vacuum degree needs to be reduced, the absorbent 3221 needs to be activated by heating. The absorbent 3221 is heated and activated by the heating component 3223 to release the gas adsorbed in the absorbent 3221 to achieve the purpose of reducing the vacuum degree. After the adjustment is completed, the electronic control system 31 closes the adjustment door 3211 to isolate the adsorbent 3221 from the gas in the vacuum insulation layer 2, and turns off the heating component 3223 to stop the activation of the absorbent 3221 so that the absorbent 3221 no longer releases gas.

[0039] The absorbent 3221 is sponge palladium or colloidal palladium; when heated to 40-50°C, most of the absorbed hydrogen is released, and the vacuum degree is adjusted by the absorption or release of the gas.

[0040] The heating component 3223 is a heating wire, a heating plate or other forms of heating elements that generate heat when powered.

[0041] Example 3: Combination Figure 6 To explain:

[0042] The vacuum degree adjustment mechanism 3 also includes a micro-cabin insulation pad 34, which is placed between the gas adsorption cabin 321 and the inner wall of the vacuum insulation layer 2 close to the superconducting cable body 1 to block the heat energy conduction of the heating component 3223. Since the superconducting cable body 1 is usually placed in a low-temperature medium, it is necessary to maintain a low-temperature environment of the superconducting cable. The micro-cabin insulation pad 34 is used to prevent the heat conduction generated by the heating component 3223 from affecting the low-temperature environment.

[0043] Taking the absorbent 3221 as sponge palladium as an example, the working principle is explained:

[0044] When the palladium sponge is heated to 40-50°C, most of the absorbed hydrogen is released. When the palladium sponge is used as an absorbent 3221, the gas in the vacuum insulation layer 2 needs to be replaced with hydrogen. When the vacuum probe 33 senses that the vacuum degree is lower than the set threshold, it is necessary to evacuate the vacuum. The lifting component 3212 is raised by the electric control system 31 to drive the regulating door 3211 to open, so that the palladium sponge in the gas adsorption cabin 32 absorbs the hydrogen in the vacuum insulation layer 2 to improve the vacuum degree of the vacuum insulation layer 2. When the vacuum degree reaches the threshold, the lifting component 3212 is lowered by the electric control system 31 to drive the regulating door 3211 is closed to prevent the sponge palladium from absorbing the hydrogen in the vacuum insulation layer 2; when the vacuum degree of the vacuum probe 33 is higher than the set threshold, the vacuum degree needs to be lowered, and the lifting component 3212 is raised through the electronic control system 31 to drive the adjustment door 3211 to open, and at the same time, the heating component 3223 is started to heat the adsorbent 3221 for activation, so that the adsorbent 3221 releases hydrogen to reduce the vacuum degree. When the vacuum degree reaches the threshold, the lifting component 3212 is lowered through the electronic control system 31 to drive the adjustment door 3211 to close, and at the same time, the heating component 3223 is stopped to heat the adsorbent 3221.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention; therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent replacements, and improvements made to the above embodiments based on the technical essence of the present invention shall be included in the scope of protection of the technical solution of the present invention.

Claims

1. A superconducting cable with an automatic vacuum adjustment device, comprising a superconducting cable body (1) and a vacuum insulation layer (2) coated on the outer layer of the superconducting cable body (1), wherein the tube wall of the vacuum insulation layer (2) is a vacuum structure, and is characterized in that: The invention also includes a vacuum degree regulating mechanism (3) arranged on the inner wall of the vacuum insulation layer (2) close to the superconducting cable body (1), the vacuum degree regulating mechanism (3) including an electric control system (31), a gas adsorption cabin (32) and a vacuum probe (33), the electric control system (31) being electrically connected to the gas adsorption cabin (32) and the vacuum probe (33) respectively, the vacuum probe (33) being used to detect the vacuum degree of the vacuum insulation layer (2), and the electric control system (31) being used to control the gas adsorption cabin (32) to adsorb or release gas to regulate the vacuum degree of the vacuum insulation layer (2); the vacuum degree regulating mechanism (3) also includes a micro cabin thermal insulation pad (34), the micro cabin thermal insulation pad (34) being placed between the gas adsorption cabin body (321) and the inner wall of the vacuum insulation layer (2) close to the superconducting cable body (1), to block the heat energy conduction of the heating component (3223).

2. A superconducting cable with a vacuum degree automatic adjustment device according to claim 1, characterized in that: The gas adsorption cabins (32) are provided in a plurality, the gas adsorption cabins (32) are arranged in an array around the axis of the vacuum thermal insulation layer (2), and the vacuum probes (33) are provided at equal intervals along the axis of the vacuum thermal insulation layer (2).

3. A superconducting cable with a vacuum degree automatic adjustment device according to claim 2, characterized in that: The gas adsorption cabin (32) comprises a gas adsorption cabin body (321) and a gas adsorption component (322), and the gas adsorption component (322) is placed in the gas adsorption cabin body (321).

4. A superconducting cable with a vacuum degree automatic adjustment device according to claim 3, characterized in that: The gas adsorption component (322) comprises an adsorbent (3221), a leak-proof layer (3222) and a heating component (3223); the adsorbent (3221) and the heating component (3223) are placed in the gas adsorption cabin (321); the adsorbent (3221) is coated on the outside of the heating component (3223); the heating component (3223) is electrically connected to the electric control system (31); the leak-proof layer (3222) covers the adsorbent (3221); and the leak-proof layer (3222) is used to block and fix the adsorbent (3221).

5. The superconducting cable with a vacuum degree automatic adjustment device according to claim 3, characterized in that: The upper end surface of the gas adsorption cabin (321) is provided with an adjustment door (3211), the lower end surface of the adjustment door (3211) is provided with a lifting assembly (3212), one end of the lifting assembly (3212) away from the adjustment door (3211) is fixed in the gas adsorption cabin (321), and the adjustment door (3211) is electrically connected to the electric control system (31).

6. The superconducting cable with a vacuum degree automatic adjustment device according to claim 4, characterized in that: The anti-leakage layer (3222) is a breathable sponge-like structure.

7. The superconducting cable with a vacuum degree automatic adjustment device according to claim 6, characterized in that: The adsorbent (3221) is a material capable of absorbing and releasing gas.

8. The superconducting cable with a vacuum degree automatic adjustment device according to claim 7, characterized in that: The adsorbent (3221) is sponge palladium or colloidal palladium.

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