A superconducting magnet coil potting device

Abstract

The application discloses a kind of superconducting magnet coil solid sealing device, comprising: vacuum solid sealing device box;Paraffin container is arranged in vacuum solid sealing device box, for containing paraffin, paraffin container has paraffin discharge port;Paraffin circulating pump is arranged in vacuum solid sealing device box, and circulating pump inlet of paraffin circulating pump is communicated with paraffin discharge port;Coil box is used to place superconducting magnet coil, and coil box has coil box injection port, and circulating pump outlet of paraffin circulating pump is communicated with coil box injection port;Heating device is used to heat the cavity of vacuum solid sealing device box.The superconducting magnet coil solid sealing device provided by the application, paraffin circulating pump is used as the driving source of paraffin flow, so that paraffin fills the gap of superconducting magnet coil in flow state, and the filling effect is good, and the solid sealing demand of superconducting magnet coil with coil box can be met;Heating device heats the cavity of vacuum solid sealing device box, and temperature uniformity is good, effectively avoid the problem that paraffin is reduced in temperature due to flow in pipeline.

Description

Technical Field

[0001] This invention relates to the field of magnet coil sealing technology, and more particularly to a superconducting magnet coil sealing device. Background Technology

[0002] As a key component of maglev vehicles, the onboard superconducting magnet serves on the moving maglev train. Unlike the service environment of traditional static superconducting magnets, the onboard superconducting magnet faces scenarios such as acceleration and deceleration, varying speeds, vibration, and impact. Its internal load exhibits different alternating characteristics under different conditions, which places higher demands on the reliability and stability of the onboard superconducting magnet. The superconducting magnet coil is the core component of the onboard superconducting magnet. It contains thin superconducting tape wound inside, with some of the superconducting tape suspended in the air. To improve the reliability and stability of the superconducting magnet coil, a paraffin wax sealing process is used to fill the internal gaps of the superconducting magnet coil with paraffin wax.

[0003] Existing superconducting magnet coil sealing devices mostly employ a casting process, which involves pouring a large flow of liquid paraffin into the superconducting magnet coil. This method is suitable for superconducting magnet coils without a coil box. After the sealing process is completed, the paraffin wraps around the outer layer of the superconducting magnet coil, forming a so-called "paraffin coil box." However, for superconducting magnet coils with a coil box, it is necessary to fill the narrow gaps inside the coil box, making the aforementioned devices and casting processes clearly unsuitable.

[0004] Therefore, how to provide a superconducting magnet coil sealing device that meets the sealing requirements of superconducting magnet coils with coil boxes is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a superconducting magnet coil sealing device to meet the sealing requirements of superconducting magnet coils with coil boxes.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A superconducting magnet coil sealing device, comprising:

[0008] Vacuum sealing device box;

[0009] A paraffin container, disposed inside the vacuum sealing device box, is used to contain paraffin wax, and the paraffin container has a paraffin wax discharge port;

[0010] A paraffin circulation pump is installed inside the vacuum sealing device box, and the circulation pump inlet of the paraffin circulation pump is connected to the paraffin discharge outlet;

[0011] A coil box, disposed inside the vacuum sealing device box, is used to hold a superconducting magnet coil. The coil box has a coil box injection port, and the circulation pump outlet of the paraffin circulation pump is connected to the coil box injection port.

[0012] A heating device is used to heat the cavity of the vacuum sealing device box.

[0013] Optionally, in the above-mentioned superconducting magnet coil sealing device, the coil box further has a coil box outlet, and a paraffin return pipe is connected to the coil box outlet, the outlet of which is connected to the paraffin container.

[0014] Optionally, in the above-mentioned superconducting magnet coil sealing device, the coil box injection port is located at the bottom of the coil box, and the coil box discharge port is located at the top of the coil box.

[0015] Optionally, in the above-mentioned superconducting magnet coil sealing device, a backflow preventer bend is provided on the paraffin return pipeline.

[0016] Optionally, in the above-mentioned superconducting magnet coil sealing device, the paraffin return pipeline includes:

[0017] The first return branch has its first end connected to the outlet of the coil box.

[0018] The second return branch has its first end connected to the paraffin container, one end of the check bend connected to the second end of the first return branch, and the other end of the check bend connected to the second end of the second return branch.

[0019] Optionally, in the above-mentioned superconducting magnet coil sealing device, the anti-backflow bend has a U-shaped structure, and the arc-shaped section of the anti-backflow bend is located at the lowest part of the anti-backflow bend.

[0020] Optionally, in the above-mentioned superconducting magnet coil sealing device, the first return branch and the second return branch are located on the same straight line, and the anti-backflow bend is lower than the straight line where the first return branch and the second return branch are located.

[0021] Optionally, in the above-mentioned superconducting magnet coil sealing device, the paraffin container is a container with a top opening, and the first end of the second return branch communicates with the paraffin container through the top opening of the paraffin container.

[0022] Optionally, the superconducting magnet coil sealing device described above further includes a paraffin circulation pump cooling system, which includes:

[0023] The heat exchange coil is installed at the location where the paraffin circulating pump needs to dissipate heat.

[0024] A cooling water pump, wherein the inlet of the cooling water pump is connected to a cold water source through an inlet pipe, the outlet of the cooling water pump is connected to the inlet of the heat exchange coil through an outlet pipe, and the outlet of the heat exchange coil is connected to a drain pipe.

[0025] Optionally, in the above-mentioned superconducting magnet coil sealing device, the heating device includes:

[0026] An electric heating element is installed on the inner wall of the vacuum sealing device box;

[0027] A turbulence fan is connected to the inner wall of the vacuum sealing device housing.

[0028] The superconducting magnet coil sealing device provided by this invention includes a vacuum sealing device box and a paraffin container, a paraffin circulation pump, a coil box, and a heating device disposed within the vacuum sealing device box. When sealing a superconducting magnet coil is required, the coil box is placed inside the vacuum sealing device box, with the coil box inlet connected to the outlet of the paraffin circulation pump. Sufficient paraffin is placed in the paraffin container, and the heating device is turned on to heat the cavity of the vacuum sealing device box. Once the paraffin melts to a liquid state, the paraffin circulation pump is turned on, allowing the paraffin to be injected into the coil box through the coil box inlet, thus sealing the superconducting magnet coil. In this superconducting magnet coil sealing device, the paraffin circulation pump acts as the driving source for the paraffin flow, ensuring that the paraffin is in a flowing state when filling the gaps in the superconducting magnet coil, resulting in good filling effect and meeting the sealing requirements of superconducting magnet coils with coil boxes. The heating device heats the cavity of the vacuum sealing device box, facilitating centralized temperature control of the equipment, ensuring good temperature uniformity, and effectively preventing temperature drops caused by paraffin flow in the pipeline. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the superconducting magnet coil sealing device disclosed in Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the superconducting magnet coil sealing device disclosed in Embodiment 2 of the present invention;

[0032] Figure 3 This is a schematic diagram of the superconducting magnet coil sealing device disclosed in Embodiment 3 of the present invention.

[0033] Figures 1-3 The meanings of the various reference numerals in the attached figures are as follows:

[0034] 100 is a vacuum sealing device box;

[0035] 200 is the paraffin container, 201 is the paraffin return pipe, 2011 is the first return branch, 2012 is the second return branch, and 202 is the stop-return elbow.

[0036] 300 is the paraffin circulation pump, 301 is the inlet pipe, 302 is the cooling water pump, 303 is the drain pipe, and 304 is the outlet pipe.

[0037] 400 is the coil box, 401 is the coil box inlet, and 402 is the coil box outlet. Detailed Implementation

[0038] The core of this invention is to provide a superconducting magnet coil sealing device to meet the sealing requirements of superconducting magnet coils with coil boxes.

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1-3 As shown in the figure, an embodiment of the present invention discloses a superconducting magnet coil sealing device, including a vacuum sealing device box 100, a paraffin container 200, a paraffin circulation pump 300, a coil box 400, and a heating device.

[0041] The vacuum sealing device box 100 serves as the enclosure structure for the sealing device, used to house the equipment required for sealing the superconducting magnet coil. A cavity is formed inside the vacuum sealing device box 100, allowing the equipment to be located within the cavity and achieving equipment integration.

[0042] A paraffin wax container 200 is placed inside the vacuum sealing device box 100 to hold paraffin wax. The paraffin wax container 200 has a paraffin wax discharge port for discharging the molten paraffin wax. Specifically, the paraffin wax container 200 can be an open container or a closed container, as long as it is convenient to hold the paraffin wax. The material of the paraffin wax container 200 can be glass, stainless steel, etc., as long as it can hold paraffin wax and the container will not melt when the paraffin wax melts. Those skilled in the art can select the appropriate material for the paraffin wax container 200 according to the actual situation.

[0043] The paraffin wax circulation pump 300 is installed inside the vacuum sealing device box 100. The circulation pump inlet of the paraffin wax circulation pump 300 is connected to the paraffin wax outlet. The paraffin wax circulation pump 300 serves as the driving source for the flow of paraffin wax, providing power for its flow. The paraffin wax circulation pump 300 can be a variable frequency circulation pump, where different injection rates of paraffin wax can be adjusted by changing the frequency of the paraffin wax circulation pump 300. Of course, the paraffin wax circulation pump 300 can also be a fixed frequency circulation pump. It will be understood by those skilled in the art that the type of paraffin wax circulation pump 300 is not limited here, as long as it meets the requirements for transporting paraffin wax.

[0044] The coil box 400 is used to hold the superconducting magnet coil. The coil box 400 has a coil box injection port 401. The circulation pump outlet of the paraffin circulation pump 300 is connected to the coil box injection port 401. When the paraffin circulation pump 300 is turned on, the molten paraffin is discharged from the paraffin container 200 through the paraffin outlet and injected into the coil box 400 through the coil box injection port 401 to seal the superconducting magnet coil.

[0045] The heating device is used to heat the cavity of the vacuum sealing device box 100, providing the temperature required for the paraffin to melt. Simultaneously, it ensures that the cavity of the vacuum sealing device box 100 is in a uniform thermal environment, and that the equipment within the cavity is in a uniform temperature environment, facilitating centralized temperature control and ensuring good temperature uniformity. Those skilled in the art will understand that the heating device can be installed inside the vacuum sealing device box 100 to heat the entire cavity, or it can be installed outside the vacuum sealing device box 100 to heat only the cavity itself; the specific location can be selected based on the actual situation. Regarding the type of heating device, it can be a heater, heating plate, etc., and the specific type is not limited here.

[0046] The superconducting magnet coil sealing device disclosed in this invention involves placing a coil box 400 inside a vacuum sealing device box 100 when sealing a superconducting magnet coil. The coil box injection port 401 is connected to the outlet of a paraffin circulation pump 300. Sufficient paraffin is placed in a paraffin container 200. A heating device is turned on to heat the cavity of the vacuum sealing device box 100. When the paraffin melts into a liquid, the paraffin circulation pump 300 is turned on, allowing the paraffin to be injected into the coil box 400 through the coil box injection port 401, thereby sealing the superconducting magnet coil. The superconducting magnet coil sealing device disclosed in this invention uses a paraffin circulation pump 300 as the driving source for paraffin flow, so that the paraffin is in a flowing state when filling the gaps of the superconducting magnet coil, resulting in good filling effect and meeting the sealing requirements of superconducting magnet coils with coil boxes 400. The heating device heats the cavity of the vacuum sealing device box 100, which facilitates centralized control of the equipment temperature, has good temperature uniformity, and can effectively avoid the problem of temperature drop caused by paraffin flow in the pipeline.

[0047] like Figure 1 As shown, to better fill the gaps in the superconducting magnet coil with paraffin wax and facilitate the removal of air bubbles from the coil box 400, in a specific embodiment of the present invention, the coil box 400 also has a coil box outlet 402. A paraffin wax return pipe 201 is connected to the coil box outlet 402, and the outlet of the paraffin wax return pipe 201 is connected to the paraffin wax container 200. When it is necessary to seal the superconducting magnet coil, the heating device is turned on. When the paraffin wax melts to a liquid state, the paraffin wax circulation pump 300 is turned on, injecting the paraffin wax into the coil box 400 through the coil box inlet 401. While filling the gaps in the superconducting magnet coil, the paraffin wax continuously drives away air bubbles, exiting the coil box 400 from the coil box outlet 402 and entering the paraffin wax return pipe 201, returning to the paraffin wax container 200. The paraffin wax return pipe 201 ensures that the paraffin wax is in a flowing state when filling the gaps, resulting in better filling effect. It also effectively drives away air bubbles in the coil box 400, thereby improving the reliability and stability of the superconducting magnet coil.

[0048] To further achieve the effect of expelling air bubbles, based on the above embodiment, the coil box inlet 401 is located at the bottom of the coil box 400, and the coil box outlet 402 is located at the top of the coil box 400. That is, after paraffin wax passes through the paraffin wax circulation pump 300, it is injected into the coil box 400 through the coil box inlet 401 at the bottom, and then discharged from the coil box 400 through the coil box outlet 402 at the top, entering the paraffin wax return pipe 201 and returning to the paraffin wax container 200. This arrangement utilizes the fact that air is less dense than paraffin wax, causing air bubbles to flow upwards with the paraffin wax within the coil box 400 and thus be expelled from the coil box 400.

[0049] like Figure 2 As shown, to prevent outside gas from returning to the coil box 400 through the paraffin return pipe 201 when the paraffin circulation pump 300 stops operating, in a specific embodiment of the present invention, a check bend 202 is provided on the paraffin return pipe 201. The check bend 202 increases the resistance of outside gas when it passes through the paraffin return pipe 201, resulting in a lower flow velocity of the outside gas and effectively preventing outside gas from returning to the coil box 400 through the paraffin return pipe 201. Specifically, the check bend 202 can be a right-angle bend or an arc-shaped bend; its specific type is not limited here, as long as it can prevent outside gas from returning to the coil box 400 when the paraffin circulation pump 300 stops operating.

[0050] like Figure 2 As shown, based on the above embodiment, the paraffin return pipeline 201 includes a first return branch 2011 and a second return branch 2012.

[0051] The first return branch 2011 is connected to the coil box outlet 402 at one end; the second return branch 2012 is connected to the paraffin container 200 at one end; a check bend 202 is connected to the second end of the first return branch 2011 at one end and to the second end of the second return branch 2012 at the other end, meaning the check bend 202 is located between the first return branch 2011 and the second return branch 2012. Paraffin wax exits the coil box 400 from the coil box outlet 402 and enters the first return branch 2011. After passing through the check bend 202, it returns to the paraffin container 200, and air bubbles also return to the paraffin container 200 along with the flow of the paraffin wax.

[0052] like Figure 2 As shown, based on the above embodiments, in a specific embodiment of the present invention, the backflow preventer 202 has a U-shaped structure, and the arc-shaped section of the backflow preventer 202 is located at the bottom of the backflow preventer 202. The setting of the arc-shaped section at the bottom further effectively prevents external gas from returning to the coil box 400 through the paraffin return pipe 201.

[0053] like Figure 2 As shown, in a specific embodiment of the present invention, the first return branch 2011 and the second return branch 2012 are located on the same straight line, and the backflow preventer bend 202 is lower than the straight line containing the first return branch 2011 and the second return branch 2012. This arrangement further effectively prevents external gas from returning to the coil box 400 through the paraffin return pipe 201. Of course, those skilled in the art will understand that the first return branch 2011 and the second return branch 2012 may not be located on the same straight line, and the first return branch 2011 and the second return branch 2012 may be connected by a bend.

[0054] To facilitate the placement of paraffin wax and to help remove air bubbles from the coil box 400, such as Figure 2 As shown, in a specific embodiment of the present invention, the paraffin container 200 is a container with a top opening, and the first end of the second return branch 2012 extends into the top opening of the paraffin container 200 and communicates with it. The top opening of the paraffin container 200 facilitates the placement of paraffin wax and also facilitates the discharge of air bubbles in the second return branch 2012. Of course, the first end of the second return branch 2012 can also extend into the liquid paraffin wax in the paraffin container 200.

[0055] To dissipate heat from the paraffin circulation pump 300, such as Figure 3As shown, the superconducting magnet coil sealing device disclosed in this invention also includes a paraffin circulating pump cooling system. Further, the paraffin circulating pump cooling system includes a heat exchange coil and a cooling water pump 302. The heat exchange coil is located at the position where the paraffin circulating pump 300 needs heat dissipation. The cooling water pump inlet of the cooling water pump 302 is connected to a cold water source via an inlet pipe 301, and the cooling water pump outlet of the cooling water pump 302 is connected to the inlet of the heat exchange coil via an outlet pipe 304. The outlet of the heat exchange coil is connected to a drain pipe 303. When the paraffin circulating pump 300 is operating, the cooling water pump 302 is turned on, allowing cooling water to enter the heat exchange coil to absorb the heat dissipated by the paraffin circulating pump 300 and then discharge through the drain pipe 303, ensuring the normal operation of the paraffin circulating pump 300.

[0056] This invention discloses a superconducting magnet coil sealing device, the heating device comprising an electric heating tube and a turbulence fan. The electric heating tube is disposed on the inner wall of the vacuum sealing device housing 100, and the turbulence fan is connected to the inner wall of the vacuum sealing device housing 100. The electric heating tube serves as a heat source to heat the cavity of the vacuum sealing device housing 100, and the turbulence fan causes airflow within the cavity of the vacuum sealing device housing 100. This airflow ensures a uniform temperature distribution within the vacuum sealing device housing 100, effectively avoiding the temperature drop problem caused by the paraffin wax flowing through the pipes. Those skilled in the art will understand that the electric heating tube can be disposed on the side wall or the top wall of the vacuum sealing device housing 100, as long as it does not affect normal operation.

[0057] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0059] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0060] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A superconducting magnet coil sealing device, characterized in that, include: Vacuum sealing device box (100); A paraffin container (200) is disposed inside the vacuum sealing device box (100) for containing paraffin wax, and the paraffin container (200) has a paraffin wax discharge port; A paraffin circulation pump (300) is installed inside the vacuum sealing device box (100), and the circulation pump inlet of the paraffin circulation pump (300) is connected to the paraffin discharge outlet; A coil box (400) is used to hold a superconducting magnet coil. The coil box (400) has a coil box injection port (401). The circulation pump outlet of the paraffin circulation pump (300) is connected to the coil box injection port (401). A heating device is used to heat the cavity of the vacuum sealing device box (100); The coil box (400) also has a coil box outlet (402), and a paraffin return pipe (201) is connected to the coil box outlet (402), and the outlet of the paraffin return pipe (201) is connected to the paraffin container (200). A backflow preventer (202) is installed on the paraffin return pipe (201); The paraffin return line (201) includes: The first return branch (2011) has its first end connected to the coil box outlet (402); The second return branch (2012) has its first end connected to the paraffin container (200), one end of the check bend (202) connected to the second end of the first return branch (2011), and the other end of the check bend (202) connected to the second end of the second return branch (2012).

2. The superconducting magnet coil sealing device as described in claim 1, characterized in that, The coil box injection port (401) is located at the bottom of the coil box (400), and the coil box discharge port (402) is located at the top of the coil box (400).

3. The superconducting magnet coil sealing device as described in claim 1, characterized in that, The backflow preventer (202) has a U-shaped structure, and the arc-shaped section of the backflow preventer (202) is located at the bottom of the backflow preventer (202).

4. The superconducting magnet coil sealing device as described in claim 1, characterized in that, The first return branch (2011) and the second return branch (2012) are located on the same straight line, and the anti-backflow bend (202) is lower than the straight line where the first return branch (2011) and the second return branch (2012) are located.

5. The superconducting magnet coil sealing device as described in claim 1, characterized in that, The paraffin container (200) is a container with a top opening, and the first end of the second return branch (2012) communicates with the paraffin container (200) by extending into the top opening of the paraffin container (200).

6. The superconducting magnet coil sealing device according to any one of claims 1-5, characterized in that, It also includes a paraffin circulation pump cooling system, which comprises: The heat exchange coil is installed at the location where the paraffin circulating pump (300) needs to dissipate heat; The cooling water pump (302) has its inlet connected to a cold water source via an inlet pipe (301), and its outlet connected to the inlet of the heat exchange coil via an outlet pipe (304). The outlet of the heat exchange coil is connected to a drain pipe (303).

7. The superconducting magnet coil sealing device according to any one of claims 1-5, characterized in that, The heating device includes: An electric heating element is disposed on the inner wall of the vacuum sealing device box (100); A turbulence fan is connected to the inner wall of the vacuum sealing device housing (100).

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