Impregnation and potting device for superconducting magnet coils

Abstract

The disclosure provides an impregnation encapsulation device of a superconducting magnet coil, which comprises a melting box, an impregnation box and an encapsulation cabin; the melting box is used for melting impregnation encapsulation material; the impregnation box is used for accommodating the superconducting magnet coil and the impregnation encapsulation material discharged from the melting box, and the bottom of the impregnation box is provided with a heat exchange device; the encapsulation cabin is used for communicating with the melting box and accommodating the impregnation box, and the side plate of the encapsulation cabin is provided with a first heating element; in the height direction of the encapsulation cabin, the first heating element is at least two, and the first heating elements at different heights can be independently heated. In the device, the bottom and the side are heated through the heat exchange device and the first heating element, the heating direction is increased, and the first heating elements at different heights are independently heated, so that a controllable temperature field can be formed in the encapsulation cabin, the controllability of the temperature in the encapsulation cabin is effectively improved, and the encapsulation quality of the superconducting magnet coil is improved.

Description

Technical Field

[0001] This disclosure relates to the field of sealing technology for superconducting magnet coils, and particularly to an impregnation and sealing device for superconducting magnet coils. Background Technology

[0002] In high-temperature superconducting electric maglev trains, the superconducting magnet coil is the core device for generating the train's levitation force, and the operational reliability of the superconducting magnet coil is directly related to the safety and stability of the entire system.

[0003] Because vehicle-mounted superconducting magnet coils must withstand long-cycle alternating loads during dynamic service, the non-fully secured strip material inside the coil is prone to lateral displacement, leading to alternating fatigue damage and eventually fatigue cracks, which can cause the superconducting magnet coil to fail in severe cases. Therefore, it is necessary to impregnate and seal the superconducting magnet coil by filling the internal voids with materials such as molten paraffin wax to effectively fix and protect the coil.

[0004] In related technologies, the sealing device for a superconducting magnet coil includes a sealing chamber, a wax melting tank, a vacuum system, a filling system, and a heating device. The wax melting tank is used to melt paraffin wax, which is then poured into the sealing chamber through the filling system. The sealing chamber is a sealed cavity containing the superconducting magnet coil to be sealed. The heating device is located inside the sealing chamber, at the bottom of the superconducting magnet coil. This bottom-heating method results in poor temperature control within the sealing chamber, leading to a need to improve the sealing quality of the superconducting magnet coil. Summary of the Invention

[0005] In view of this, the purpose of this disclosure is to provide an impregnation and sealing device for a superconducting magnet coil to improve the temperature controllability within the sealing chamber, thereby improving the sealing quality of the superconducting magnet coil.

[0006] To achieve the above objectives, this disclosure provides the following technical solutions:

[0007] This disclosure provides an impregnation and sealing device for a superconducting magnet coil. The device includes: a melting box for melting and impregnating sealing material; an impregnation box for containing the superconducting magnet coil and the impregnation and sealing material discharged from the melting box, with a heat exchange device at the bottom of the impregnation box; and a sealing chamber for communicating with the melting box and for containing the impregnation box. The side plate of the sealing chamber is provided with a first heating element. In the height direction of the sealing chamber, there are at least two first heating elements, and the first heating elements at different heights can be heated independently.

[0008] In some embodiments, the solidified chamber has two side plates distributed along a first direction, which is perpendicular to the height direction of the solidified chamber; each side plate is provided with a first heating element.

[0009] In some embodiments, the top plate of the sealed chamber is provided with a second heating element; there are at least two second heating elements, and each second heating element is capable of heating independently; or, there is one second heating element.

[0010] In some embodiments, both the first heating element and the second heating element are infrared radiation heating lamps.

[0011] In some embodiments, the heat exchange device includes a flow channel integrated into an impregnation box, and the flow channel is used for the flow of heat exchange medium; the solid seal chamber is provided with a first interface and a second interface, the first interface being used to communicate with the inlet of the flow channel and the second interface being used to communicate with the outlet of the flow channel.

[0012] In some embodiments, the first interface and the inlet of the flow channel are connected by a plug-in connection, and the second interface and the outlet of the flow channel are connected by a plug-in connection; or, the first interface and the inlet of the flow channel are connected by a retractable tube, and the second interface and the outlet of the flow channel are connected by a retractable tube.

[0013] In some embodiments, the bottom of the impregnation box is provided with casters; and / or, the sealed compartment is provided with an openable and closable door, and the door is provided with a sealed observation window.

[0014] In some embodiments, in the height direction, the melting box is located at the top of the solidification chamber; the bottom end of the melting box is provided with a heating device and a filling outlet, the inner bottom wall of the melting box has a first end near the filling outlet and a second end away from the filling outlet, and the inner bottom wall extends inclined towards the solidification chamber from the second end to the first end in the height direction; the solidification chamber is provided with a filling inlet, which is connected to the filling outlet through a connecting pipe, and the connecting pipe is provided with a valve.

[0015] In some embodiments, an injection pipe is provided inside the solidification chamber, the injection pipe is connected to an injection inlet, and the injection pipe is configured to be bendable and retain its shape after bending, and to extend and retract along its axial direction and retain its shape after extension and retraction.

[0016] In some embodiments, the solidification chamber is provided with a first vacuum port; and / or, the melting chamber includes: a chamber body and a cover that closes the chamber body; the melting chamber is provided with a second vacuum port.

[0017] In some embodiments, the solidification chamber is provided with a first vacuum port and the melting box is provided with a second vacuum port; both the first vacuum port and the second vacuum port are connected to a vacuum pump through a vacuum pipe.

[0018] In some embodiments, the impregnation and sealing device for the superconducting magnet coil further includes: a first temperature sensor disposed within the sealing chamber, the inner cavity of the sealing chamber having at least two partitions along the height direction, each partition having a corresponding first heating element and a first temperature sensor, the first temperature sensor being used to detect the temperature within the partition; and a controller, the first temperature sensor, the first heating element and the second heating element within the sealing chamber being electrically connected to the controller, the controller being configured to: control the heating amount of each first heating element and the heating amount of each second heating element according to the detection value of the first temperature sensor.

[0019] In some embodiments, one of two adjacent partitions is a high partition and the other is a low partition, with the high partition being higher than the low partition; the controller is also configured to control the temperature of the high partition to be higher than the temperature of the low partition during the condensation process of the impregnated sealing material.

[0020] In some embodiments, the impregnation and sealing device for the superconducting magnet coil further includes: a second temperature sensor for detecting the temperature of the heat exchange medium at the inlet of the heat exchange device; a third temperature sensor for detecting the temperature of the heat exchange medium at the outlet of the heat exchange device; both the second and third temperature sensors are electrically connected to a controller, which is also configured to monitor the temperature of the heat exchange medium.

[0021] The superconducting magnet coil impregnation and sealing device provided in this disclosure includes an impregnation box with a heat exchange device at the bottom. This allows for active heat exchange between the impregnation box, the superconducting magnet coil inside, and the impregnation and sealing material during the impregnation and sealing process. This enables more direct and precise temperature control within the impregnation box. Simultaneously, the side plate of the sealing chamber is equipped with a first heating element, and there are at least two first heating elements along the height of the sealing chamber. The first heating elements at different heights are heated independently, allowing for independent temperature control of different height areas within the sealing chamber. This facilitates the formation of the desired temperature distribution within the sealing chamber, such as creating a temperature gradient increasing from bottom to top along the height direction during the condensation stage of the impregnation and sealing material. This guides the orderly condensation of the impregnation and sealing material, improving the impregnation and sealing effect. Therefore, by using a heat exchange device and a first heating element, bottom and side heating is achieved, increasing the heating orientation. Moreover, the first heating elements at different heights are heated independently, thereby forming a controllable temperature field within the sealed chamber. This effectively improves the controllability of the temperature within the sealed chamber, and thus improves the sealing quality of the superconducting magnet coil.

[0022] The technical features mentioned above, as well as those shown individually in the accompanying drawings, can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this disclosure, 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 embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 An isometric view of the impregnation and sealing device for a superconducting magnet coil provided in an embodiment of this disclosure;

[0025] Figure 2 Another isometric view of the impregnation and sealing device for the superconducting magnet coil provided in the embodiments of this disclosure;

[0026] Figure 3 An isometric view of the sealing chamber in the impregnation and sealing device for a superconducting magnet coil provided in an embodiment of this disclosure;

[0027] Figure 4 An isometric view of the impregnation box in the impregnation and sealing device for the superconducting magnet coil provided in the embodiments of this disclosure;

[0028] Figure 5 A schematic diagram showing the connection of the flow channel, the first interface, and the second interface in the impregnation and sealing device for the superconducting magnet coil provided in an embodiment of this disclosure;

[0029] Figure 6 An isometric view of the melting chamber in the impregnation and sealing apparatus for a superconducting magnet coil provided in an embodiment of this disclosure;

[0030] Figure 7 This is a partial structural diagram of the melting box in the impregnation and sealing device for a superconducting magnet coil provided in an embodiment of this disclosure.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Melting chamber, 101. Chamber body, 102. Chamber cover, 103. Filling outlet, 104. Inner bottom wall, 105. Second vacuum port, 106. Melting observation window, 2. Impregnation box, 3. Solidification chamber, 301. Bottom plate, 302. Top plate, 303. Front plate, 304. Back plate, 305. Side plate, 306. Door, 307. First port, 308. Second port, 309. Filling inlet, 3010. First vacuum port, 4. Heat exchange device, 4a. Flow channel, 401. Inlet, 402. Outlet, 5. First heating element, 6. Second heating element, 7. Telescopic tube, 8. Casters, 9. Bracket, 10. Heating device, 11. Connecting pipe, 12. Valve, 13. Filling pipe, 14. First temperature sensor, 15. Controller, 16. Second temperature sensor, 17. Third temperature sensor, 18. Vacuum pipe, 1801. First branch pipe, 1802. Second branch pipe, 1803. Main pipe, 19. Vacuum pump. Detailed Implementation

[0033] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments.

[0034] In the description of the embodiments of this disclosure, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0035] In the description of the embodiments of this disclosure, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The term "communication" means that gas, liquid, or material can flow between two spaces or components.

[0036] In this disclosure, directional terms are used, for example, the directional term "altitude direction" refers to the attached... Figures 1 to 3 The directions indicated by the arrows are only for reference in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this disclosure, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure. Furthermore, unless otherwise stated in this disclosure, "a plurality of" refers to two or more.

[0037] In the description of embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0038] In the description of the embodiments disclosed herein, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] The terms "parallel" and "perpendicular" used in this disclosure refer to "basically parallel" and "basically perpendicular" in actual operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0040] The impregnation and sealing device for superconducting magnet coils provided in this embodiment is used to impregnate and seal superconducting magnet coils.

[0041] In this embodiment of the disclosure, the "impregnation and sealing device for superconducting magnet coil" is simply referred to as the "impregnation and sealing device".

[0042] like Figure 1 As shown, the impregnation and sealing apparatus provided in this embodiment includes a melting box 1, an impregnation box 2, and a sealing chamber 3.

[0043] The melting chamber 1 is used for melting and impregnating the sealing material. The impregnating sealing material can be paraffin wax, epoxy resin, cyanate ester resin, polyurethane or other fusible materials. The specific type of impregnating sealing material is not limited in the embodiments of this disclosure.

[0044] The impregnation box 2 is used to contain the superconducting magnet coil and the impregnation and sealing material discharged from the melting chamber 1. The top of the impregnation box 2 has an opening to allow the superconducting magnet coil and the impregnation and sealing material to be placed inside the impregnation box 2. It can be understood that the impregnation and sealing material in the melting chamber 1 melts and then enters the impregnation box 2 through the sealing chamber 3.

[0045] A heat exchange device 4 is provided at the bottom of the impregnation box 2. The heat exchange device 4 is configured to provide cooling or heating to the impregnation box 2, which can be understood as: the heat exchange device 4 is configured to provide cooling or heating to the superconducting magnet coil and the impregnation sealing material.

[0046] The solidification chamber 3 is used to communicate with the melting chamber 1 and to house the impregnation box 2. The solidification chamber 3 is a sealable chamber used to provide a vacuum and temperature-controlled environment to complete the impregnation and solidification of the superconducting magnet coil. For example, in conjunction with... Figure 2 and Figure 3 As shown, the solidified compartment 3 has a bottom plate 301, a top plate 302, a front plate 303, a back plate 304, and two side plates 305. The bottom plate 301 and the top plate 302 are distributed along the height direction of the solidified compartment 3, the two side plates 305 are distributed along the first direction, and the front plate 303 and the back plate 304 are distributed along the second direction. The first direction, the second direction, and the height direction are perpendicular to each other.

[0047] It should be noted that the first direction can be understood as the direction of the long side of the solidified compartment 3, and the second direction can be understood as the direction of the narrow side of the solidified compartment 3; or, the first direction can be understood as the direction of the narrow side of the solidified compartment 3, and the second direction can be understood as the direction of the long side of the solidified compartment 3.

[0048] like Figure 3 As shown, the side plate 305 of the solidified chamber 3 is provided with a first heating element 5. In the height direction of the solidified chamber 3, there are at least two first heating elements 5, and the first heating elements 5 at different heights can be heated independently.

[0049] The first heating element 5 has a top end and a bottom end in the height direction. The two first heating elements 5 are at the same height, which means that the top ends and bottom ends of the two first heating elements 5 are aligned. The two first heating elements 5 are at different heights, which means that the top ends, bottom ends, or both the top ends and bottom ends of the two first heating elements 5 are not aligned.

[0050] It should be noted that the ability of first heating elements 5 at different heights to heat independently means that the operation (or heating) of first heating elements 5 at different heights does not affect each other. For example, the heating power of first heating elements 5 at different heights does not affect each other, and the amount of heat provided by first heating elements 5 at different heights does not affect each other. There may be one or at least two first heating elements 5 at the same height, and this disclosure does not limit this.

[0051] In order to enable the first heating elements 5 at different heights to be heated independently, the first heating elements 5 at different heights can be connected to different circuits.

[0052] In some embodiments, the first heating element 5 can be an infrared radiation heating lamp that radiates heat into the sealed chamber 3 in a non-contact manner to keep the temperature inside the sealed chamber 3 within a set range. This allows for switching the power on and off or adjusting the heating power to generate different amounts of heat in different altitude areas.

[0053] In other embodiments, the first heating element 5 may be a resistance heating element, such as a heating wire, an electric heating tube, or other types. The specific type of the first heating element 5 is not limited in the embodiments disclosed herein.

[0054] The impregnation and sealing device provided in this embodiment of the invention, by setting an impregnation box 2 and a heat exchange device 4 at the bottom of the impregnation box 2, enables active heat exchange between the impregnation box 2 and the superconducting magnet coil and impregnation and sealing material inside during the impregnation and sealing process. This allows for more direct and precise temperature regulation within the impregnation box 2. Simultaneously, the side plate 305 of the sealing chamber 3 is provided with a first heating element 5, and there are at least two first heating elements 5 in the height direction of the sealing chamber 3. The first heating elements 5 at different heights can be heated independently, thereby enabling independent temperature control of different height areas within the sealing chamber 3. This facilitates the formation of the required temperature distribution within the sealing chamber 3. For example, during the condensation stage of the impregnation and sealing material, a temperature gradient increasing from bottom to top along the height direction can be formed, guiding the impregnation and sealing material to condense in an orderly manner and improving the impregnation and sealing effect. Therefore, by using the heat exchange device 4 and the first heating element 5, bottom and side heating is achieved, increasing the heating orientation. Moreover, the first heating element 5 at different heights is heated independently, thereby forming a controllable temperature field within the solidified chamber 3. This effectively improves the controllability of the temperature within the solidified chamber 3, and thus improves the solidification quality of the superconducting magnet coil.

[0055] In the impregnation and sealing device provided in this embodiment, the first heating element 5 at different heights is heated independently, which can effectively reduce energy waste.

[0056] In the impregnation and sealing device provided in this embodiment, the melting box 1 is connected to the sealing chamber 3. The impregnation and sealing material is melted in the melting box 1 and then enters the impregnation box 2, realizing the separation and independent control of the melting process and the sealing process, which is beneficial to improving the sealing quality of the superconducting magnet coil.

[0057] In the impregnation and sealing device, the first heating element 5 is distributed on one side plate 305; or, as... Figure 3 As shown, the first heating element 5 is distributed on both side plates 305. This increases the heating orientation, which is beneficial for controlling the temperature inside the solidification chamber 3, thereby improving the solidification quality of the superconducting magnet coil.

[0058] like Figure 3 As shown, in some embodiments, the top plate 302 of the solidified chamber 3 is provided with a second heating element 6. The second heating element 6 can be one or at least two.

[0059] When there are at least two second heating elements 6, each second heating element 6 can heat independently, that is, each second heating element 6 can heat independently. It should be noted that the heating of any two second heating elements 6 does not affect each other.

[0060] In order to enable each second heating element 6 to heat independently, each second heating element 6 can be connected to different circuits.

[0061] It is understandable that the first heating element 5 and the second heating element 6 can be heated independently, meaning that the heating of the first heating element 5 and the second heating element 6 does not affect each other. In this way, heating can be carried out from the bottom, side and top, increasing the heating orientation and further improving the temperature controllability inside the solidification chamber 3, thereby further improving the solidification quality of the superconducting magnet coil.

[0062] like Figure 3 As shown, any two second heating elements 6 can be distributed along the first direction. This improves the controllability of the temperature inside the solidified chamber 3 in the first direction.

[0063] In some other embodiments, any two second heating elements 6 may be distributed along the second direction or other directions, and this disclosure does not limit this.

[0064] The second heating element 6 can be an infrared radiation heating lamp, which radiates heat into the sealed chamber 3 in a non-contact manner to keep the temperature inside the sealed chamber 3 within a set range. In this way, the heating power can be turned on and off or adjusted to generate different amounts of heating in different altitude areas.

[0065] In other embodiments, the second heating element 6 may be a resistance heating element, such as a heating wire, an electric heating tube, or other types. The specific type of the second heating element 6 is not limited in the embodiments disclosed herein.

[0066] like Figure 3 As shown, the solidified chamber 3 is equipped with an openable and closable door 306, and the door 306 is equipped with a solidified observation window (not shown in the figure) to facilitate observation of the filling and condensation inside the solidified chamber 3.

[0067] For example, the hatch 306 is disposed on the front panel 303 of the solidified compartment 3; or, the hatch 306 and the front panel 303 are an integral structure; or, the hatch 306 is located in other positions of the solidified compartment 3. The specific position of the hatch 306 is not limited in the embodiments disclosed herein.

[0068] The hatch 306 can be a swing door or other types, and this disclosure does not limit this type.

[0069] like Figure 4 As shown, in some embodiments, the heat exchange device 4 includes a flow channel 4a integrated into the impregnation box 2, through which the heat exchange medium flows. The heat exchange medium can be water, refrigerant, or other media.

[0070] The flow channel 4a has an inlet 401 and an outlet 402. The heat exchange medium enters the flow channel 4a from the inlet 401 and flows out of the flow channel 4a from the outlet 402.

[0071] like Figure 2 As shown, the solidified chamber 3 is provided with a first interface 307 and a second interface 308. The first interface 307 is used to connect with the inlet 401 of the flow channel 4a, and the second interface 308 of the solidified chamber 3 is used to connect with the outlet 402 of the flow channel 4a. In this way, the external heat exchange medium can enter the flow channel 4a through the first interface 307, and then flow out through the outlet 402 and the second interface 308.

[0072] For example, the first interface 307 and the second interface 308 may be located on the back plate 304 of the solidified compartment 3 to avoid interfering with the solidified observation window on the hatch 306.

[0073] In the above embodiments, a heat exchange medium at a set temperature can be introduced into the flow channel 4a according to the temperature requirements within the solidification chamber 3. For example, when the solidification material needs to be heated and impregnated within the solidification chamber 3, a higher-temperature heat exchange medium is introduced into the flow channel 4a; when the solidification material needs to be cooled within the solidification chamber 3, a lower-temperature heat exchange medium is introduced into the flow channel 4a. This allows the temperature at the bottom of the superconducting magnet coil to be adjusted and controlled within a wider temperature range, further improving the temperature controllability within the solidification chamber 3.

[0074] The flow channel 4a can be formed by a pipe, or the flow channel 4a can be formed by a channel on the body of the impregnation box 2.

[0075] The shape of the flow channel 4a can be straight or curved. When the shape of the flow channel 4a is curved, such as... Figure 4 and Figure 5 As shown, flow channel 4a can be a serpentine tube.

[0076] There are multiple ways to connect the heat exchange medium between the impregnation box 2 and the solidified chamber 3. In some embodiments, the first interface 307 and the inlet 401 of the flow channel 4a can be connected by plugging, and the second interface 308 and the outlet 402 of the flow channel 4a can be connected by plugging. This simplifies the assembly and disassembly of the impregnation box 2.

[0077] like Figure 5 As shown, in some other embodiments, the first interface 307 and the inlet 401 of the flow channel 4a are connected by a telescopic tube 7, and the second interface 308 and the outlet 402 of the flow channel 4a are connected by a telescopic tube 7. Thus, during the process of pushing the impregnation box 2 in or pulling it out, the telescopic tube 7 can extend or retract to compensate for positional changes, ensuring that the first interface 307 and the inlet 401 remain connected, and the second interface 308 and the outlet 402 remain connected.

[0078] The retractable tube 7 can be a metal corrugated pipe or a metal flexible tube. The present disclosure does not limit the type of the retractable tube 7.

[0079] like Figure 4 As shown, the bottom of the immersion box 2 is equipped with casters 8, which makes it easy to move the immersion box 2. Since the superconducting magnet coil is heavy, by setting casters 8 at the bottom of the immersion box 2, the immersion box 2 can be easily pushed in or pulled out of the solidified chamber 3, which greatly reduces the difficulty of operating the immersion box 2 and improves the ease of use of the immersion box 2.

[0080] To ensure the impregnation box 2 is stably held within the sealed chamber 3, the caster 8 can be a brake caster. In some other embodiments, the impregnation box 2 can be stably held within the sealed chamber 3 in other ways, and the caster 8 is not limited to a brake caster.

[0081] The caster 8 can be connected to the immersion box 2 via the bracket 9. The present disclosure does not limit the way the caster 8 is set.

[0082] like Figure 1 As shown, in some embodiments, the melting box 1 is located at the top of the solidification chamber 3 in the height direction; as Figure 7 As shown, a heating device 10 and an injection outlet 103 are provided at the bottom of the melting tank 1. The inner bottom wall 104 of the melting tank 1 has a first end near the injection outlet 103 and a second end away from the injection outlet 103. The inner bottom wall 104 extends inclined towards the solidification chamber 3 from the second end to the first end along the height direction. Figure 3 As shown, the solidified chamber 3 is equipped with a filling inlet 309. In this structure, combined with... Figure 1 , Figure 3 and Figure 7 As shown, the inlet 309 is connected to the outlet 103 via a connecting pipe 11, and the connecting pipe 11 is equipped with a valve 12.

[0083] In the above embodiments, the heating device 10 is used to heat the impregnating sealing material so as to melt the impregnating sealing material.

[0084] In the above embodiment, the inner bottom wall 104 forms a guiding surface. The molten impregnation and sealing material flows to the injection outlet 103 under the guiding action of the inner bottom wall 104, i.e., under gravity, and then flows through the connecting pipe 11 to the injection inlet 309, and then flows into the impregnation box 2. Partially molten impregnation and sealing material is located on the superconducting magnet coil. In this way, there is no need for a power device to drive the molten impregnation and sealing material, which simplifies the structure of the impregnation and sealing device and reduces the cost of the impregnation and sealing device; moreover, there is no material loss, which reduces the impregnation and sealing cost of the superconducting magnet coil.

[0085] The connecting pipe 11 is equipped with a valve 12, which is used to control the opening and closing of the injection process. The valve 12 can also regulate the flow rate of the impregnating sealing material, thereby ensuring that the injection process can be controlled. For example, the valve 12 can be a flow valve.

[0086] The outside of the connecting pipe 11 may be wrapped with at least one of a heating element and an insulation element to prevent the filling liquid from cooling and solidifying during transportation.

[0087] An injection tube 13 is installed inside the sealing chamber 3, and the injection tube 13 is connected to the injection inlet 309. The injection tube 13 is configured to bend and maintain its shape after bending, and to extend and retract along its axis and maintain its shape after extension and retraction. This allows the injection outlet of the injection tube 13 to be adjusted to the required position within the impregnation box 2. The position of the injection outlet of the injection tube 13 can be flexibly adjusted so that the impregnation sealing material flows into the impregnation box 2 at the required angle and relative position, which is beneficial to improving the sealing effect of the superconducting magnet coil. Moreover, the injection outlet of the injection tube 13 can be moved to any position required for injection, thus supporting the injection needs of superconducting magnet coils of different specifications and shapes, giving the impregnation sealing device good adaptability.

[0088] For example, the infusion tube 13 can be a metal shaped hose or a metal corrugated tube. This embodiment of the disclosure does not limit the specific type of the infusion tube 13.

[0089] The solidified chamber 3 is equipped with a first vacuum port 3010, which is used to connect to the vacuum pump 19 through the vacuum pipe 18 to ensure the vacuum environment inside the solidified chamber 3, which facilitates the solidification of the superconducting magnet coil.

[0090] For example, the first vacuum port 3010 may be located on the back plate 304 of the solidified chamber 3 to avoid interfering with the solidified observation window on the door 306.

[0091] like Figure 6 As shown, in some embodiments, the melting box 1 includes a box body 101 and a box cover 102 that closes the box body 101. It should be noted that the box cover 102 can be opened to allow solid impregnation and sealing material to be added into the box body 101.

[0092] like Figure 7 As shown, the melting chamber 1 is equipped with a second vacuum port 105 for evacuating the melting chamber 1. In this way, the melting chamber 1 can be a vacuum environment, which reduces the probability of the impregnating sealing material directly contacting the air and absorbing moisture. This reduces the probability of airflow entering the sealing chamber 3 with the impregnating sealing material, and further reduces the probability of the vacuum level in the sealing chamber 3 being broken, effectively improving the quality of the sealed superconducting magnet coil.

[0093] like Figure 2As shown, in some embodiments, the first vacuum port 3010 of the solidification chamber 3 and the second vacuum port 105 of the melting box 1 are both connected to the vacuum pump 19 via a vacuum pipe 18. In this way, the solidification chamber 3 and the melting box 1 share the vacuum pump 19 and part of the vacuum pipe 18, which simplifies the overall structure and reduces the cost of the entire impregnation and solidification device.

[0094] Specifically, the vacuum tube 18 includes a main tube 1803, a first branch tube 1801, and a second branch tube 1802. One end of the first branch tube 1801 and the second branch tube 1802 are connected to one end of the main tube 1803. The other end of the first branch tube 1801 is connected to the first vacuum port 3010, and the other end of the second branch tube 1802 is connected to the second vacuum port 105. The other end of the main tube 1803 is connected to the vacuum pump 19. In this way, the solidification chamber 3 and the melting chamber 1 share the vacuum pump 19 and the main tube 1803.

[0095] The aforementioned vacuum tube 18 is also equipped with a valve assembly, which has a first state, a second state, a third state, and a fourth state. In the first state, the first branch tube 1801 is connected to the main tube 1803; in the second state, the second branch tube 1802 is connected to the main tube 1803; in the third state, both the first branch tube 1801 and the second branch tube 1802 are connected to the main tube 1803; in the fourth state, neither the first branch tube 1801 nor the second branch tube 1802 is connected to the main tube 1803.

[0096] For example, the valve assembly may include a three-way valve, with the main pipe 1803, the first branch pipe 1801, and the second branch pipe 1802 respectively connected to the three valve ports of the three-way valve; or, the valve assembly may include two two-way valves, with one two-way valve connected in series to the first branch pipe 1801 and the other two-way valve connected in series to the second branch pipe 1802.

[0097] In the above embodiments, the valve assembly allows for the separate or simultaneous evacuation of the solidification chamber 3 and the melting chamber 1. Furthermore, the melting chamber 1 is an independent vacuum space and an independent heating space, enabling the sequential solidification of various materials through multiple processes, thus exhibiting strong scalability.

[0098] like Figure 6 As shown, in some embodiments, at least one of the housing 101 and the lid 102 may be provided with a melting observation window 106 for observing the melting situation inside the housing 101.

[0099] Combination Figure 1 and Figure 3 As shown, in some embodiments, the impregnation and sealing device further includes a first temperature sensor 14 and a controller 15.

[0100] The first temperature sensor 14 is disposed inside the solidified chamber 3. The inner cavity of the solidified chamber 3 has at least two partitions along the height direction, and each partition has a corresponding first heating element 5 and first temperature sensor 14. In this way, the first heating element 5 heats the corresponding partition, and the first temperature sensor 14 detects the temperature in the corresponding partition.

[0101] The first temperature sensor 14, the first heating element 5, and the second heating element 6 within the sealed chamber 3 are all electrically connected to the controller 15. The controller 15 is configured to control the heating amount of each first heating element 5 and each second heating element 6 based on the detection value of the first temperature sensor 14. In this way, heating can be independently adjusted according to the temperature feedback of each zone to form the desired temperature distribution.

[0102] In two adjacent partitions, one is a high partition and the other is a low partition; in the height direction, the high partition is higher than the low partition. In some embodiments, the controller 15 is also configured to control the temperature of the high partition to be higher than the temperature of the low partition during the condensation process of the impregnating sealing material. In this way, a temperature gradient with increasing temperature from bottom to top can be formed, causing the impregnating sealing material to condense from bottom to top, effectively improving the sealing effect of the superconducting magnet coil.

[0103] like Figure 4 As shown, in some embodiments, a second temperature sensor 16 is provided at the inlet 401 of the heat exchange device 4, and a third temperature sensor 17 is provided at the outlet 402. Both the second temperature sensor 16 and the third temperature sensor 17 are electrically connected to the controller 15, which is also configured to monitor the temperature of the heat exchange medium. For example, by monitoring the temperature of the heat exchange medium at the inlet 401 and the outlet 402, the heat exchange status of the heat exchange device 4 can be understood, thereby facilitating the control of the temperature inside the solidified chamber 3.

[0104] In this embodiment of the application, the working process of the impregnation and sealing device can be as follows:

[0105] Open the lid 102 of the melting box 1, put the impregnation and sealing material into the melting box 1, and then close the lid 102; open the door 306 of the sealing chamber 3, push the impregnation box 2 containing the superconducting magnet coil into the sealing chamber 3, so that the inlet 401 and outlet 402 of the flow channel 4a are connected to the first interface 307 and the second interface 308 of the sealing chamber 3 respectively; adjust the outlet position of the injection pipe 13 so that it is aligned with the position to be injected in the impregnation box 2; close the door 306.

[0106] Start the vacuum pump 19 and evacuate the melting box 1 and the solidification chamber 3 through the vacuum tube 18;

[0107] Start the heating device 10 at the bottom of the melting box 1 to melt the impregnating sealing material;

[0108] Hot water or other heat exchange medium is introduced into the flow channel 4a of the heat exchange device 4, and the first heating element 5 and the second heating element 6 are activated. The controller 15 controls the heating amount of each zone according to the detection value of the first temperature sensor 14, so that the solid seal chamber 3 reaches the temperature required for injection.

[0109] After the impregnation and sealing material melts and the sealing chamber 3 reaches the required temperature for injection, valve 12 is opened, and the molten impregnation and sealing material flows into the impregnation box 2. The molten impregnation and sealing material gradually submerges the superconducting magnet coil in the impregnation box 2. The injection situation can be observed through the sealing observation window on the door 306.

[0110] After the superconducting magnet coil is completely impregnated, close valve 12 to stop the injection and maintain the set temperature and vacuum level in the solidification chamber 3. At this time, the vacuuming and heating in the melting box 1 can be stopped. If it is necessary to use the impregnation and solidification material for secondary solidification after the paraffin impregnation and solidification, it can be put into the melting box 1 in advance for preparation.

[0111] After the set temperature and vacuum level in the solidification chamber 3 are maintained for a set time, the condensation stage begins. Cold water or other heat exchange media are introduced into the flow channel 4a of the heat exchange device 4 to preferentially cool the bottom of the impregnation box 2. The controller 15 independently controls the heating amount of each first heating element 5 and second heating element 6 based on the detection value of the first temperature sensor 14, so that the temperature of the higher zone is greater than the temperature of the lower zone, thereby forming a temperature gradient with increasing temperature from bottom to top in the solidification chamber 3. This causes the impregnated solidification material in the lower part of the impregnation box 2 to condense first, and the impregnated solidification material in the upper part to condense later, achieving orderly condensation.

[0112] After condensation is complete, turn off all heating elements and vacuum pump 19, break the vacuum in solidification chamber 3, open chamber door 306, pull out impregnation box 2, and complete the entire impregnation and solidification process.

[0113] The above-described working process of the impregnation and sealing device is merely an illustrative example and not the only working process of the impregnation and sealing device.

[0114] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles used, and is not intended to limit this disclosure. The described embodiments are only a part of the embodiments of this disclosure, and not all of them. Various modifications and variations can be made to this disclosure by those skilled in the art. The scope of protection in this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalent features without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions provided in this disclosure.

Claims

1. An impregnation and sealing device for a superconducting magnet coil, characterized in that, include: A melting box (1) is used for melting and impregnating sealing materials; Impregnation box (2), the impregnation box (2) is used to contain the superconducting magnet coil and the impregnation and sealing material discharged from the melting box (1), and the bottom of the impregnation box (2) is provided with a heat exchange device (4). A solidified chamber (3) is used to communicate with the melting box (1) and to house the impregnation box (2). The side plate (305) of the solidified chamber (3) is provided with a first heating element (5). In the height direction of the solidified chamber (3), there are at least two first heating elements (5), and the first heating elements (5) at different heights can be heated independently.

2. The impregnation and sealing device according to claim 1, characterized in that, The solidified chamber (3) has two side plates (305) distributed along a first direction, which is perpendicular to the height direction of the solidified chamber (3); each side plate (305) is provided with the first heating element (5).

3. The impregnation and sealing device according to claim 1, characterized in that, The top plate (302) of the solidified chamber (3) is provided with a second heating element (6); There are at least two second heating elements (6), and each second heating element (6) can be heated independently; or, there is one second heating element (6).

4. The impregnation and sealing device according to claim 3, characterized in that, Both the first heating element (5) and the second heating element (6) are infrared radiation heating lamps.

5. The impregnation and sealing device according to claim 1, characterized in that, The heat exchange device (4) includes a flow channel (4a), which is integrated into the impregnation box (2) and is used for the heat exchange medium to flow through. The solidified chamber (3) is provided with a first interface (307) and a second interface (308). The first interface (307) is used to communicate with the inlet (401) of the flow channel (4a), and the second interface (308) is used to communicate with the outlet (402) of the flow channel (4a).

6. The impregnation and sealing device according to claim 5, characterized in that, The first interface (307) and the inlet (401) of the flow channel (4a) are connected by plugging, and the second interface (308) and the outlet (402) of the flow channel (4a) are connected by plugging; Alternatively, the first interface (307) and the inlet (401) of the flow channel (4a) are connected by a retractable tube (7), and the second interface (308) and the outlet (402) of the flow channel (4a) are connected by a retractable tube (7).

7. The impregnation and sealing device according to claim 1, characterized in that, The bottom of the immersion box (2) is provided with casters (8); And / or, the sealed compartment (3) is provided with an openable and closable door (306), and the door (306) is provided with a sealed observation window.

8. The impregnation and sealing device according to claim 1, characterized in that, In the height direction, the melting box (1) is located at the top of the solidification chamber (3); The bottom end of the melting tank (1) is provided with a heating device (10) and a filling outlet (103). The inner bottom wall (104) of the melting tank (1) has a first end close to the filling outlet (103) and a second end away from the filling outlet (103). The inner bottom wall (104) extends obliquely towards the solidification chamber (3) from the second end to the first end along the height direction. The solidified chamber (3) is provided with an injection inlet (309), which is connected to the injection outlet (103) through a connecting pipe (11), and the connecting pipe (11) is provided with a valve (12).

9. The impregnation and sealing device according to claim 8, characterized in that, The solidification chamber (3) is provided with an injection pipe (13), which is connected to the injection inlet (309). The injection pipe (13) is configured to be able to bend and maintain its shape after bending, and to be able to extend and retract along its axis and maintain its shape after extension and retraction.

10. The impregnation and sealing device according to claim 1, characterized in that, The solidified chamber (3) is provided with a first vacuum port (3010); And / or, the melting box (1) includes: a box body (101) and a box cover (102) for closing the box body (101); the melting box (1) is provided with a second vacuum port (105).

11. The impregnation and sealing device according to claim 10, characterized in that, The solidification chamber (3) is provided with a first vacuum port (3010) and the melting box (1) is provided with a second vacuum port (105). Both the first vacuum port (3010) and the second vacuum port (105) are connected to the vacuum pump (19) through the vacuum tube (18).

12. The impregnation and sealing device according to any one of claims 1-11, characterized in that, The impregnation and sealing device further includes: The first temperature sensor (14) is disposed in the solidified chamber (3). The inner cavity of the solidified chamber (3) has at least two partitions along the height direction. Each partition has a corresponding first heating element and the first temperature sensor (14). The first temperature sensor (14) is used to detect the temperature in the partition. The controller (15) is electrically connected to the first temperature sensor (14), the first heating element (5) and the second heating element (6) in the solidified chamber (3). The controller (15) is configured to control the heating amount of each first heating element (5) and the heating amount of each second heating element (6) according to the detection value of the first temperature sensor (14).

13. The impregnation and sealing device according to claim 12, characterized in that, In two adjacent partitions, one is a high partition and the other is a low partition, with the high partition being higher than the low partition; The controller (15) is also configured to control the temperature of the high zone to be greater than the temperature of the low zone during the condensation process of the impregnated sealing material.

14. The impregnation and sealing device according to claim 12, characterized in that, The impregnation and sealing device further includes: The second temperature sensor (16) is used to detect the temperature of the heat exchange medium at the inlet (401) of the heat exchange device (4); The third temperature sensor (17) is used to detect the temperature of the heat exchange medium at the outlet (402) of the heat exchange device (4); The second temperature sensor (16) and the third temperature sensor (17) are both electrically connected to the controller (15), which is also configured to monitor the temperature of the heat exchange medium.

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