A vacuum wax dipping device and its wax dipping method

Abstract

The present invention discloses a vacuum wax-impregnating device, comprising: an impregnation chamber, which is an openable sealed chamber body and is internally provided with a coil box for placing a superconducting coil, and a heating pipe is arranged at the bottom of the coil box; a vacuum generating unit and a paraffin wax perfusion unit communicated with the impregnation chamber, the vacuum generating unit is used for creating and maintaining a vacuum environment in the impregnation chamber, the paraffin wax perfusion unit is used for melting paraffin wax and conveying the melted paraffin wax into the coil box, and a communication valve for controlling the on / off of the pipeline is arranged on the paraffin wax perfusion pipeline; a temperature control unit, which is used for respectively controlling the temperature of the heating pipe and the temperature when the paraffin wax perfusion unit melts paraffin wax. The present invention is provided with a vacuum generating unit and a paraffin wax perfusion unit that are hermetically communicated with the impregnation chamber. By virtue of the high fluidity characteristics of the melted paraffin wax, the superconducting coil is effectively sealed with paraffin wax under vacuum and constant temperature conditions, thereby improving the stability of the superconducting coil during vehicle service. The present invention also discloses a wax-impregnating method using the above-mentioned vacuum wax-impregnating device.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting coils, and particularly relates to a vacuum wax-impregnating device and a wax-impregnating method thereof. Background Art

[0002] A superconducting magnet is an electromagnet made of a type-II superconductor with a high transition temperature and an extremely high critical magnetic field at low temperatures. Due to the electrical losses caused by the absence of wire resistance and the magnetic losses caused by the presence of an iron core, it is widely used in industry and scientific research.

[0003] Since a superconducting magnet is not only affected by external vibration loads during operation but also by internal Lorentz forces, certain mechanical stability measures need to be taken for the superconducting magnet to prevent the superconducting tape from having small movements within the winding, thereby affecting the superconducting performance. The commonly used mechanical stability measure is to use a solid-sealing process impregnated with epoxy resin, that is, to use liquid epoxy resin to fill the gaps inside the superconducting magnet to support the superconducting magnet from the inside.

[0004] For the solid-sealing of large superconducting coils commonly used in superconducting maglev trains, due to the large size of the superconducting coils, numerous internal gaps, and complex gap structures, it is difficult for existing impregnating devices and processes to achieve full filling inside the superconducting coils, resulting in the still easy occurrence of the training effect after the solid-sealing of large superconducting coils, affecting the service effect and lifespan of the superconducting coils.

[0005] Therefore, how to effectively solid-seal large superconducting coils to improve the stability of superconducting coils when put into service is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a vacuum wax-impregnating device to effectively solid-seal large superconducting coils and improve the stability of superconducting coils when put into service.

[0007] Another purpose of the present invention is to provide a wax-impregnating method for impregnating and solid-sealing superconducting coils using the above-mentioned vacuum wax-impregnating device.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A vacuum wax-impregnating device includes:

[0010] An impregnation chamber, the impregnation chamber is an openable sealed chamber body, a coil box for placing a superconducting coil is arranged inside the impregnation chamber, and a heating pipe is arranged at the bottom of the coil box;

[0011] A vacuum generating unit and a paraffin wax perfusion unit communicating with the impregnation chamber. The vacuum generating unit is used to create and maintain a vacuum environment in the impregnation chamber. The paraffin wax perfusion unit is used to melt paraffin wax and convey the molten paraffin wax into the coil box through a paraffin wax perfusion pipeline. A connection valve for controlling the on / off of the paraffin wax perfusion pipeline is provided on the paraffin wax perfusion pipeline.

[0012] A temperature control unit, which is used to control the temperature of the heating tube and the temperature when the paraffin wax perfusion unit melts paraffin wax respectively.

[0013] Preferably, in the above vacuum wax impregnation equipment, the outer surface of the paraffin wax perfusion pipeline is wound and covered with a tracing heating tape.

[0014] Preferably, in the above vacuum wax impregnation equipment, the paraffin wax perfusion unit includes a wax melting basin for placing paraffin wax and a heater arranged at the bottom of the wax melting basin. The heater is connected to the temperature control unit through a wire to heat the wax melting basin through the temperature control unit. One end of the paraffin wax perfusion pipeline extends into the wax melting basin.

[0015] Preferably, in the above vacuum wax impregnation equipment, a first temperature sensor is arranged inside the coil box, and a second temperature sensor is arranged inside the wax melting basin. The first temperature sensor and the second temperature sensor are electrically connected to the temperature control unit.

[0016] Preferably, in the above vacuum wax impregnation equipment, the vacuum generating unit includes a mechanical pump and a bellows. The mechanical pump is communicated with the impregnation chamber through the bellows.

[0017] Preferably, in the above vacuum wax impregnation equipment, an observation window for observing the inside of the impregnation chamber is opened on the impregnation chamber.

[0018] A wax impregnation method for impregnating and solid-sealing a superconducting coil using the above vacuum wax impregnation equipment, at least including the following steps:

[0019] Demolding pretreatment: Apply a demolding agent to the surface of the superconducting coil. After the treatment is completed, place the superconducting coil in the coil box inside the impregnation chamber and close the impregnation chamber to ensure the sealing of the impregnation chamber.

[0020] Heating the coil box: Heat the coil box to a first preset temperature through the temperature control unit and control the temperature inside the coil box to be maintained at the first preset temperature through the temperature control unit.

[0021] Vacuum pumping of the impregnation chamber: Turn on the vacuum generating unit to perform vacuum pumping on the impregnation chamber until the vacuum degree inside the impregnation chamber is greater than a first vacuum degree, and keep the vacuum generating unit turned on to maintain the vacuum degree inside the impregnation chamber.

[0022] Paraffin perfusion: Melt paraffin at a second preset temperature through the temperature control unit and the paraffin perfusion unit, then cool the melted paraffin and maintain it at the first preset temperature, and open the connecting valve to allow the paraffin to be poured into the coil box in a vacuum state through the impregnation chamber in a vacuum state;

[0023] Coil impregnation: Keep the superconducting coil impregnated with paraffin for a first preset duration in a vacuum and constant temperature state;

[0024] Normal pressure heat preservation: After impregnating the coil, break the vacuum state of the impregnation chamber until the impregnation chamber returns to normal pressure, and keep the superconducting coil impregnated for a second preset duration at normal pressure and the first preset temperature;

[0025] Demolding of superconducting coil: Stop heating the coil box, take out the superconducting coil after the melted paraffin in the impregnation chamber cools, and demold the superconducting coil to complete the solid sealing of the superconducting coil.

[0026] Preferably, in the above wax dipping method, the first preset temperature is 95°C - 100°C, and the second preset temperature is 105°C - 110°C.

[0027] Preferably, in the above wax dipping method, the first vacuum degree is -0.09 MPa.

[0028] Preferably, in the above wax dipping method, the first preset duration is 1.9 h - 2.1 h, and the second preset duration is 0.9 h - 1.1 h.

[0029] As can be seen from the above technical solutions, the vacuum wax-impregnating equipment provided by the present invention includes an impregnation chamber, a vacuum generating unit, a paraffin wax perfusion unit, and a temperature control unit. Among them, the impregnation chamber is an openable sealed chamber body. A coil box is arranged inside the impregnation chamber. The coil box is used to place the superconducting coil and provide a wax-impregnating place for the superconducting coil. A heating pipe is arranged at the bottom of the coil box to realize the heating and constant temperature control of the coil box; the impregnation chamber is hermetically connected to both the vacuum generating unit and the paraffin wax perfusion unit. Among them, the vacuum generating unit is used to create and maintain a vacuum environment inside the impregnation chamber, and evacuate the impregnation chamber after placing the superconducting coil, which can remove the gas and moisture adsorbed in the pores inside the superconducting coil, making the paraffin wax impregnation effect of the superconducting coil better; the paraffin wax perfusion unit is used to melt the paraffin wax and transport the melted paraffin wax to the inside of the coil box through a paraffin wax perfusion pipeline. Here, the paraffin wax perfusion pipeline is hermetically connected to the impregnation chamber, so that one end of the paraffin wax perfusion pipeline extends into the impregnation chamber and the other end extends into the melted paraffin wax. Thus, when the vacuum generating unit creates a vacuum environment in the impregnation chamber, the melted paraffin wax will flow into the coil box inside the impregnation chamber due to the negative pressure effect, so that the superconducting coil is impregnated with paraffin wax in the coil box. A connection valve for controlling the on-off of the paraffin wax perfusion pipeline is arranged on the paraffin wax perfusion pipeline. By controlling the opening and closing of the connection valve, the paraffin wax perfusion can be started after the impregnation chamber enters the vacuum state, and the amount of paraffin wax perfusion can also be controlled.

[0030] The temperature control unit is used to separately control the temperature of the heating pipe and the temperature when the paraffin wax perfusion unit melts the paraffin wax. By separately controlling the temperature of the heating pipe and the temperature when the paraffin wax perfusion unit melts the paraffin wax, the problem of damaging the superconducting coil due to the high temperature requirement when melting the paraffin wax can be avoided. The vacuum wax-impregnating equipment provided by the present invention creates a vacuum environment for the impregnation chamber by setting a vacuum generating unit, places a coil box inside the impregnation chamber to provide a place for the superconducting coil to be impregnated with wax, and at the same time sets a heating pipe at the bottom of the coil box. By setting the vacuum generating unit and the heating pipe, an impregnation environment with a certain temperature under a vacuum state can be provided for the superconducting coil. At the same time, the vacuum wax-impregnating equipment is provided with a temperature control unit to separately control the temperature of the heating pipe and the temperature when the paraffin wax perfusion unit melts the paraffin wax. By separately controlling the temperature of the heating pipe and the temperature when the paraffin wax perfusion unit melts the paraffin wax, the paraffin wax can be melted and the superconducting coil can be impregnated at the optimal temperature, so that the melted paraffin wax maintains good fluidity to effectively seal the gaps inside the superconducting coil, improving the wax-impregnating efficiency and wax-impregnating effect of the superconducting coil, and making the performance of the superconducting coil stable during service after wax-impregnating and sealing. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 Structural schematic diagram of the vacuum waxing equipment provided by the embodiment of the present invention;

[0033] Figure 2 Flow schematic diagram of the waxing method provided by the embodiment of the present invention;

[0034] Among them, 10 is the impregnation chamber, 110 is the coil box, 120 is the heating pipe, 130 is the observation window, 20 is the vacuum generating unit, 210 is the mechanical pump, 220 is the bellows, 30 is the paraffin perfusion unit, 310 is the paraffin perfusion pipeline, 320 is the wax melting basin, 330 is the heater, 340 is the connecting valve, 40 is the temperature control unit. Detailed implementation manners

[0035] The core of the present invention lies in disclosing a vacuum waxing equipment to effectively seal large superconducting coils and improve the stability of superconducting coils during service on vehicles.

[0036] Another core of the present invention lies in disclosing a waxing method for impregnating and sealing superconducting coils using the above-mentioned vacuum waxing equipment.

[0037] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the invention described in the claims.

[0038] As Figure 1 shown, the vacuum waxing equipment provided by the embodiment of the present invention includes an impregnation chamber 10, a vacuum generating unit 20, a paraffin perfusion unit 30, and a temperature control unit 40. Among them, the impregnation chamber 10 is an openable sealed cabin. A coil box 110 is arranged in the impregnation chamber 10. The coil box 110 is used to place superconducting coils and provide a waxing place for the superconducting coils. A heating pipe 120 is arranged at the bottom of the coil box 110 to realize the heating of the coil box 110 and the required constant temperature control.

[0039] The impregnation chamber 10 is hermetically connected to both the vacuum generating unit 20 and the paraffin perfusion unit 30. Among them, the vacuum generating unit 20 is used to create and maintain a vacuum environment inside the impregnation chamber 10, and evacuate the impregnation chamber 10 after placing the superconducting coil, which can remove the gas and moisture adsorbed in the pores inside the superconducting coil, making the paraffin impregnation effect of the superconducting coil better.

[0040] It should be noted that the equipment for creating a vacuum in the vacuum generating unit 20 can be a vacuum pump, a Roots blower, or a vacuum generator.

[0041] The paraffin perfusion unit 30 is used to melt paraffin and transport the molten paraffin to the coil box 110 through the paraffin perfusion pipeline 310. Here, the paraffin perfusion pipeline 310 is hermetically connected to the impregnation chamber 10, so that one end of the paraffin perfusion pipeline 310 extends into the impregnation chamber 10 and the other end extends into the molten paraffin. Thus, when the vacuum generating unit 20 creates a vacuum environment in the impregnation chamber 10, the molten paraffin will flow into the coil box 110 inside the impregnation chamber 10 due to the negative pressure effect, so that the superconducting coil can be impregnated with paraffin in the coil box 110. A connection valve 340 for controlling the on-off of the paraffin perfusion pipeline 310 is provided on the paraffin perfusion pipeline 310. By controlling the opening and closing of the connection valve 340, paraffin perfusion can be started after the impregnation chamber 10 enters the vacuum state. At the same time, the amount of paraffin perfusion can also be controlled by controlling the opening and closing of the connection valve 340, so that the molten paraffin can submerge the superconducting coil in the coil box 110.

[0042] The temperature control unit 40 is used to control the temperature of the heating tube 120 and the temperature when the paraffin perfusion unit 30 melts paraffin respectively. That is, the temperature control unit 40 is provided with at least two wire interfaces to be connected to the heating tube 120 and the paraffin melting place respectively. By adjusting the power at the two wire interfaces of the temperature control unit 40, the temperature of the heating tube 120 and the paraffin melting place can be controlled separately.

[0043] Here, it should be noted that since the preferred temperature when paraffin melts is higher than the maximum temperature that the electronic components inside the superconducting coil can withstand, and in order to make the paraffin melt more fully and quickly, it is necessary to adjust the temperature of paraffin melting by the temperature control unit 40 to be higher than the temperature during superconducting coil impregnation, so as to avoid the problem of damaging the superconducting coil due to the high temperature required for melting paraffin.

[0044] The vacuum wax-impregnating equipment provided by the present invention creates a vacuum environment for the impregnation chamber 10 by setting up a vacuum generating unit 20. A coil box 110 is placed inside the impregnation chamber 10 to provide a place for impregnating the superconducting coil with wax. At the same time, a heating pipe 120 is arranged at the bottom of the coil box 110. By setting up the vacuum generating unit 20 and the heating pipe 120, an impregnation environment with a certain temperature under vacuum can be provided for the superconducting coil. At the same time, the vacuum wax-impregnating equipment is provided with a temperature control unit 40 to control the temperature of the heating pipe 120 and the temperature when the paraffin wax perfusion unit 30 melts the paraffin wax respectively. By separately controlling the temperature of the heating pipe 120 and the temperature when the paraffin wax perfusion unit 30 melts the paraffin wax, the paraffin wax melting process and the superconducting coil impregnation process can be at the optimal temperature, so that the melted paraffin wax maintains good fluidity to effectively seal the gaps inside the superconducting coil, improving the wax-impregnating efficiency and wax-impregnating effect of the superconducting coil, and making the performance of the superconducting coil stable during service after wax-impregnating and sealing.

[0045] Considering that the paraffin wax will be cooled to a certain extent in the paraffin wax perfusion pipeline 310 during the process of being transported to the coil box 110 through the paraffin wax perfusion pipeline 310, which reduces the fluidity of the melted paraffin wax and thus affects the wax-impregnating effect of the superconducting coil. In a specific embodiment of the present invention, the paraffin wax perfusion pipeline 310 is a pipeline with a heat preservation function to weaken the cooling effect of the melted paraffin wax in the paraffin wax perfusion pipeline 310. The heat preservation method for the paraffin wax perfusion pipeline 310 is to lay a heat preservation layer or wrap a tracing tape on the outer surface of the paraffin wax perfusion pipeline 310. The embodiment of the present invention preferably wraps a tracing tape on the outer surface of the paraffin wax perfusion pipeline 310 and turns on the tracing tape to preheat before paraffin wax perfusion to ensure the temperature of the paraffin wax perfusion pipeline 310 and avoid the melted paraffin wax cooling and condensing in the paraffin wax perfusion pipeline 310.

[0046] Furthermore, in the vacuum wax-impregnating equipment provided by the embodiment of the present invention, the paraffin wax perfusion unit 30 includes a wax melting basin 320 for placing paraffin wax and a heater 330 arranged at the bottom of the wax melting basin 320. The heater 330 is connected to the temperature control unit 40 through a wire to heat the wax melting basin 320 through the temperature control unit 40. One end of the paraffin wax perfusion pipeline 310 extends into the interior of the wax melting basin 320, so that when the paraffin wax is melted in the wax melting basin 320, the end of the paraffin wax perfusion pipeline 310 extending into the wax melting basin 320 remains in a sealed state, so that the melted paraffin wax can smoothly enter the impregnation chamber 10 in a vacuum state under the action of negative pressure.

[0047] On the basis of the above embodiments, a first temperature sensor is provided inside the coil box 110 to detect the temperature at the coil box 110. At the same time, a second temperature sensor is provided inside the wax melting basin 320 to detect the temperature at the wax melting basin 320. The first temperature sensor and the second temperature sensor are both electrically connected to the temperature control unit 40 to feed the temperature signals back to the temperature control unit 40. During the impregnation process of the superconducting coil, the impregnation temperature of the coil box 110 and the heating temperature of the wax melting basin 320 are set in the temperature control unit 40. The first temperature sensor and the second temperature sensor detect the temperature values at the corresponding positions and feed the temperature signals back to the temperature control unit 40. The temperature control unit 40 adjusts the power to adjust the temperatures inside the coil box 110 and the wax melting basin 320, so that the melting process of the paraffin wax and the impregnation process of the superconducting coil are both at the optimal working temperature, making the efficiency of the superconducting coil impregnation and the performance after impregnation and solid sealing more stable.

[0048] Further, in a specific embodiment of the present invention, the vacuum generating unit 20 includes a mechanical pump 210 and a bellows 220. The mechanical pump 210 is connected to and sealed with the impregnation chamber 10 through the bellows 220. By turning on the mechanical pump 210, a vacuum environment is created for the impregnation chamber 10, and the vacuum environment inside the impregnation chamber 10 is maintained by continuously turning on the mechanical pump 210.

[0049] In order to more clearly observe the process of the superconducting coil being impregnated with wax inside the impregnation chamber 10, in a specific embodiment of the present invention, an observation window 130 for observing the inside of the impregnation chamber 10 is opened on the impregnation chamber 10.

[0050] As Figure 2 shown, the present invention also provides a wax impregnation method for vacuum impregnating a superconducting coil. This wax impregnation method uses the vacuum wax impregnation equipment provided in any of the above embodiments to impregnate the superconducting coil. This wax impregnation method at least includes the following steps:

[0051] S01: Demoulding pretreatment: Apply a demoulding agent to the surface of the superconducting coil. After the treatment is completed, place the superconducting coil in the coil box 110 inside the impregnation chamber 10, and close the impregnation chamber 10 to ensure the sealing of the impregnation chamber 10;

[0052] S02: Heating the coil box: Heat the coil box 110 to a first preset temperature through the temperature control unit 40, and control the temperature inside the coil box 110 to be maintained at the first preset temperature through the temperature control unit;

[0053] S03: Vacuum pumping of the impregnation chamber: Turn on the vacuum generating unit 20 to perform a vacuum pumping process on the impregnation chamber 10 until the vacuum degree inside the impregnation chamber 10 is greater than the first vacuum degree, and keep the vacuum generating unit turned on to maintain the vacuum degree inside the impregnation chamber 10;

[0054] S04: Paraffin perfusion: The temperature control unit 40 and the paraffin perfusion unit 30 are used to melt paraffin at the second preset temperature, then cool the melted paraffin and maintain it at the first preset temperature. Open the connection valve 340 so that the paraffin is poured into the coil box 110 in a vacuum state through the impregnation chamber 10 in a vacuum state;

[0055] It should be noted that the second preset temperature is higher than the first preset temperature, so that the paraffin can be melted quickly and fully at a higher temperature. At the same time, the purpose of cooling and maintaining the melted paraffin at the first preset temperature is to transport the melted paraffin at the first preset temperature to the impregnation chamber 10 for impregnating the superconducting coil, so as to avoid damaging the electronic devices in the superconducting coil due to the too high temperature of the melted paraffin while ensuring the melting efficiency of the paraffin.

[0056] S05: Coil impregnation: Keep the superconducting coil impregnated with paraffin for the first preset duration in a vacuum and constant temperature state;

[0057] S06: Normal pressure heat preservation: After impregnating the coil, break the vacuum state of the impregnation chamber 10 until the impregnation chamber 10 returns to normal pressure, and keep the superconducting coil impregnated for the second preset duration at normal pressure and the first preset temperature;

[0058] S07: Demolding of superconducting coil: Stop heating the coil box 110, take out the superconducting coil after the melted paraffin in the impregnation chamber 10 cools, and demold the superconducting coil to complete the solid sealing of the superconducting coil.

[0059] Furthermore, in steps S02 and S04, since the maximum temperature that some electronic components in the superconducting coil can withstand is 100°C, the first preset temperature is 95°C - 100°C, preferably the first preset temperature is 95°C, and the temperature required for paraffin melting should be higher than the first preset temperature to accelerate the melting of paraffin. In an embodiment of the present invention, the second preset temperature is 105°C - 110°C, preferably the second preset temperature is 110°C.

[0060] Furthermore, in step S03, the first vacuum degree is -0.09 MPa.

[0061] Furthermore, in steps S05 and S06, the first preset duration is 1.9 h - 2.1 h, preferably the first preset duration is 2.0 h, and the second preset duration is 0.9 h - 1.1 h, preferably the second preset duration is 1.0 h.

[0062] In the description and claims of the present invention and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum wax dipping device, characterized in that, Comprising: An impregnation chamber (10), the impregnation chamber (10) being an openable and sealable chamber body, a coil box (110) for placing a superconducting coil being arranged inside the impregnation chamber (10), and a heating pipe (120) being arranged at the bottom of the coil box (110); A vacuum generating unit (20) and a paraffin perfusion unit (30) communicated with the impregnation chamber (10), the vacuum generating unit (20) being used for manufacturing and maintaining a vacuum environment inside the impregnation chamber (10), the paraffin perfusion unit (30) being used for melting paraffin and conveying the melted paraffin to the inside of the coil box (110) through a paraffin perfusion pipeline (310), and a communication valve (340) for controlling the on-off of the paraffin perfusion pipeline (310) being arranged on the paraffin perfusion pipeline (310); A temperature control unit (40), the temperature control unit (40) being used for respectively controlling the temperature of the heating pipe (120) and the temperature when the paraffin perfusion unit (30) melts paraffin; the paraffin perfusion unit (30) includes a paraffin melting basin (320) for placing paraffin and a heater (330) arranged at the bottom of the paraffin melting basin (320), the heater (330) being connected with the temperature control unit (40) through a wire to heat the paraffin melting basin (320) through the temperature control unit (40), and one end of the paraffin perfusion pipeline (310) extends into the paraffin melting basin (320) from the top open end of the paraffin melting basin (320); when the paraffin melting basin (320) melts paraffin, the end of the paraffin perfusion pipeline (310) extending into the paraffin melting basin (320) remains in a sealed state, so that the melted paraffin enters the impregnation chamber (10) in a vacuum state under the action of negative pressure; The outer surface of the paraffin perfusion pipeline (310) is wound and covered with a tracing heating tape, and the temperature of the paraffin perfusion pipeline (310) can be ensured by turning on the tracing heating tape in advance before paraffin perfusion to avoid the melted paraffin from cooling and condensing in the paraffin perfusion pipeline (310).

2. The vacuum wax dipping equipment according to claim 1, characterized in that, A first temperature sensor is arranged inside the coil box (110), a second temperature sensor is arranged inside the paraffin melting basin (320), and the first temperature sensor and the second temperature sensor are electrically connected with the temperature control unit (40).

3. The vacuum wax dipping equipment according to claim 1, characterized in that, The vacuum generating unit (20) includes a mechanical pump (210) and a corrugated pipe (220), and the mechanical pump (210) is communicated with the impregnation chamber (10) through the corrugated pipe (220).

4. The vacuum wax dipping equipment according to claim 1, characterized in that, An observation window (130) for observing the inside of the impregnation chamber (10) is opened on the impregnation chamber (10).

5. The vacuum wax dipping equipment according to claim 1, characterized in that, The equipment for the vacuum generating unit (20) to generate a vacuum is a vacuum pump, a Roots blower or a vacuum generator.

6. The vacuum wax dipping equipment according to claim 1, characterized in that, The temperature control unit (40) is provided with at least two wire interfaces to be respectively connected with the heating pipe (120) and the paraffin melting place, and by adjusting the power at the two wire interfaces of the temperature control unit (40), the separate control of the temperature of the heating pipe (120) and the paraffin melting place can be realized.

7. A wax dipping method for superconducting coil wax dipping and solid encapsulation using the vacuum wax dipping device provided in any one of claims 1-6, characterized in that At least including the following steps: Demolding pretreatment: Apply a demolding agent to the surface of the superconducting coil. After the treatment, place the superconducting coil in the coil box (110) inside the impregnation chamber (10), and close the impregnation chamber (10) to ensure the sealing of the impregnation chamber (10). Heating the coil box: Heat the coil box (110) to a first preset temperature through the temperature control unit (40), and control the temperature inside the coil box (110) to be maintained at the first preset temperature through the temperature control unit (40). Vacuum pumping of the impregnation chamber: Turn on the vacuum generating unit (20) to perform vacuum pumping on the impregnation chamber (10) until the vacuum degree inside the impregnation chamber (10) is greater than the first vacuum degree, and keep the vacuum generating unit (20) turned on to maintain the vacuum degree inside the impregnation chamber (10). Pouring paraffin: Melt paraffin at a second preset temperature through the temperature control unit (40) and the paraffin pouring unit (30), then cool the melted paraffin and keep it at the first preset temperature. Open the connecting valve (340) to allow the paraffin to be poured into the coil box (110) in a vacuum state through the impregnation chamber (10) in a vacuum state. Impregnating the coil: Keep the superconducting coil impregnated with paraffin for a first preset duration in a vacuum and constant temperature state. Normal pressure heat preservation: After impregnating the coil, break the vacuum state of the impregnation chamber (10) until the impregnation chamber (10) returns to normal pressure, and keep the superconducting coil impregnated for a second preset duration at normal pressure and the first preset temperature. Demolding the superconducting coil: Stop heating the coil box (110). After the melted paraffin inside the impregnation chamber (10) cools, take out the superconducting coil and perform demolding on the superconducting coil to complete the solid sealing of the superconducting coil.

8. The wax dipping method according to claim 7, characterized in that, The first preset temperature is 95°C - 100°C, and the second preset temperature is 105°C - 110°C.

9. The wax dipping method according to claim 7, characterized in that, The first vacuum degree is -0.09 MPa.

10. The wax dipping method according to claim 7, characterized in that, The first preset duration is 1.9 h - 2.1 h, and the second preset duration is 0.9 h - 1.1 h.

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