Rogowski coil packaging structure and nuclear fusion reaction device
By designing a packaging structure composed of cladding components, the Roche coil in the nuclear fusion reaction device is fully protected, which solves the problem of plasma damage, extends the service life of the Roche coil and improves the detection effect.
Patent Information
- Application Number
- CN202421174789.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the nuclear fusion reaction, Roche coils are susceptible to plasma damage, resulting in shortening of their lifespan and poor detection effect.
A packaging structure of Rochester coil is designed, and the different areas of the Rochester coil are arranged in the circumference of the Rochester coil through a plurality of cladding components, respectively forming a U-shaped through-grooving structure of the first shell and the second shell. The Roche coil is wrapped from both sides of the inside and outside, and the clamping member is fixed by clamps to ensure that the plasma cannot contact the Roche coil through the housing gap.
It effectively protects the Roche coil, reduces the damage to the plasma, extends the service life, and ensures the detection effect of plasma current.
Smart Images
Figure CN222462498U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of nuclear fusion technology, and in particular to a packaging structure of a Rogowski coil and a nuclear fusion reaction device. Background Art
[0002] At present, nuclear fusion reaction devices (such as tokamaks) can be used to carry out nuclear fusion reactions in order to generate clean energy that can be used. The nuclear fusion reaction device includes a reaction chamber for carrying out nuclear fusion reactions, in which plasma can be generated, and the plasma can be controlled by a magnetic field to form a plasma current, and the plasma can be heated to a fusion reaction temperature to cause a nuclear fusion reaction.
[0003] During the nuclear fusion reaction, it is necessary to detect whether the plasma current meets the set requirements to ensure the normal progress of the nuclear fusion reaction. For example, a Rogowski coil can be set around the plasma current in the reaction chamber to detect the plasma current.
[0004] However, under the action of plasma, the Rogowski coil is more likely to be damaged, which shortens the life of the Rogowski coil and affects the detection effect of the plasma current. Utility Model Content
[0005] The present application provides a packaging structure of a Rogowski coil and a nuclear fusion reaction device, which can achieve better protection for the Rogowski coil, reduce damage to the Rogowski coil caused by plasma, extend the service life of the Rogowski coil, and ensure that the Rogowski coil has a better detection effect on plasma current.
[0006] According to one aspect of an embodiment of the present application, a packaging structure of a Rogowski coil is provided, wherein the enclosed area of the Rogowski coil is for plasma current to pass through; the Rogowski coil comprises a plurality of straight strips and a bent portion, wherein the bent portion connects two straight strips extending in different directions; the packaging structure comprises a plurality of covering components, wherein the plurality of covering components are arranged along the circumference of the Rogowski coil and respectively cover different areas of the Rogowski coil;
[0007] The covering component includes a first shell and a second shell, the first shell and the second shell respectively cover the Rogowski coil from the inner and outer sides of the Rogowski coil, and the side edge of the second shell is located in the enclosed space of the first shell; the first shell and the second shell are both in the shape of a U-shaped through groove; for any one of the first shell and the second shell, any one of the shells includes a first strip portion, a second strip portion and a third strip portion connected in sequence, the first strip portion and the third strip portion are arranged oppositely, the side of any one of the shells includes the first strip portion and the third strip portion, and the side edge of any one of the shells includes the edge of the first strip portion and the third strip portion away from the second strip portion;
[0008] In the first covering part covering the straight portion, the first shell and the second shell are both in the shape of straight strips; in the second covering part covering the bent portion, the first shell and the second shell both have arc-shaped areas, and the first shell is bent toward the side where the groove is located, and the second shell is bent toward the back side of the groove.
[0009] In one embodiment, for the adjacent first covering member and the second covering member, an end portion of the first covering member can extend into a surrounding space of the second covering member.
[0010] In one embodiment, the first shell and the second shell press the Rogowski coil from the inside and outside of the Rogowski coil respectively.
[0011] In one embodiment, the packaging structure further includes a plurality of clamps;
[0012] Each clamp fixes the two covering parts by covering the ends of two adjacent covering parts that are close to each other.
[0013] In one embodiment, the packaging structure further includes an insulating film located between the Rogowski coil and the covering component and wound around the Rogowski coil.
[0014] In one embodiment, the first shell and the second shell in the first covering component are both sheet metal parts, and the first shell and the second shell in the second covering component are three-dimensional printed parts.
[0015] In one embodiment, the relative magnetic permeability of the coating component is less than 1.04;
[0016] And / or, the thickness of the first shell and the second shell are both in the range of 0.3 mm to 0.8 mm.
[0017] According to another aspect of an embodiment of the present application, a nuclear fusion reaction device is provided, the nuclear fusion reaction device comprising: a reaction chamber, at least one Rogowski coil located in the reaction chamber, and a packaging structure wrapping each Rogowski coil, the packaging structure being the above-mentioned packaging structure; a plasma current formed in the reaction chamber passes through an enclosed area of the Rogowski coil;
[0018] The shape of the Rogowski coil is the same as the polar cross-section shape of the reaction chamber, and the Rogowski coil is fixed to the inner wall of the reaction chamber by using the packaging structure; the plasma current formed in the reaction chamber passes through the surrounding area of the Rogowski coil.
[0019] In the embodiment of the present application, the covering component in the packaging structure uses the first shell and the second shell to cover the Roche coil from the inside and outside of the Roche coil respectively, and the side edge of the second shell is located in the enclosed space of the first shell. In this way, the Roche coil is surrounded by the shell all around. In the process of the plasma current passing through the enclosed area of the Roche coil, the shell can block the bombardment of the Roche coil by the plasma, ensuring that all positions of the Roche coil are protected. In addition, the side edge of the second shell near the outside of the Roche coil is located in the enclosed space of the first shell near the inside of the Roche coil, which can prevent the plasma from contacting the Roche coil through the gap between the first shell and the second shell, thereby improving the protection effect of the Roche coil. Therefore, the packaging structure can achieve a better protection effect on the Roche coil, reduce the damage of the plasma to the Roche coil, extend the service life of the Roche coil, and ensure that the Roche coil has a better detection effect on the plasma current. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic diagram of a packaging structure of a Rogowski coil provided in one embodiment of the present application;
[0021] Figure 2 This is a partial structural schematic diagram of a Rogowski coil and a packaging structure provided in one embodiment of the present application;
[0022] Figure 3 is a schematic structural diagram of a first covering component provided in one embodiment of the present application;
[0023] Figure 4 is a schematic structural diagram of a second covering component provided in one embodiment of the present application;
[0024] Figure 5 It is a partial structural schematic diagram of another Rogowski coil and packaging structure provided in one embodiment of the present application;
[0025] Figure 6 is a schematic diagram of another packaging structure of a Rogowski coil provided in an embodiment of the present application;
[0026] Figure 7 This is a schematic diagram of the structure of a clamp provided in one embodiment of the present application;
[0027] Figure 8 It is a cross-sectional view of a structure obtained after a Rogowski coil provided in an embodiment of the present application is packaged using a packaging structure. DETAILED DESCRIPTION
[0028] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.
[0029] The terms used in one or more embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present application. The singular forms of "one", "said" and "the" used in one or more embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more associated listed items. The term "at least one" in one or more embodiments of the present application refers to "one or more", and "multiple" refers to "two or more". The term "including" is an open description and should be understood as "including but not limited to", and may include other content on the basis of the content described.
[0030] It should be understood that, although the terms "first", "second", etc. may be used to describe various information in one or more embodiments of the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present application, "first" may also be referred to as "second", and similarly, "second" may also be referred to as "first". Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0031] At present, nuclear fusion is considered to be an ideal choice for solving human energy problems. Nuclear fusion reactions can provide a large amount of clean energy, and the fuel required for nuclear fusion reactions is widely available and has low cost. Accordingly, nuclear fusion reaction devices have been widely studied, such as the Tokamak device, which is a type of controllable nuclear fusion reaction device that has been studied more. The nuclear fusion reaction device may include a reaction chamber for nuclear fusion, in which a plasma current may be generated, and then a nuclear fusion reaction may occur. During the operation of the nuclear fusion reaction device, it is necessary to detect the parameters of the plasma current (such as the current size) to determine whether the parameters meet the requirements, so as to ensure the efficient and stable operation of the nuclear fusion reaction device.
[0032] Usually, a Rogowski coil (also known as a Rogowski coil) can be set in the reaction chamber of a nuclear fusion reactor to detect plasma current. The Rogowski coil is a sensor that measures large pulse currents based on the principle of electromagnetic induction. The Rogowski coil is made by winding a wrapping wire on a skeleton of a specific shape, and the skeleton is generally made of stainless steel by CNC (Computer Numerical Control) processing. In a nuclear fusion reactor, a bare coil cannot withstand the high temperature environment of plasma, so a packaging structure needs to be designed for the Rogowski coil to protect it.
[0033] In the related art, the packaging structure uses a CNC-processed Ω-shaped groove structure to protect the coil. When installing the Roche coil and the packaging structure, the Roche coil can be placed at a specified position in the reaction chamber first, and then the Ω-shaped groove-shaped packaging structure can be buckled to the corresponding position on the Roche coil, and the packaging structure can be fixed by connecting with studs and auxiliary spot welding to achieve the purpose of packaging and fixing the Roche coil. However, due to the limited space in the reaction chamber of the nuclear fusion reaction device, especially for small nuclear fusion reaction devices (such as spherical tokamaks), the installation of this design method is relatively difficult and takes a lot of time. In addition, the side of the Roche coil close to the reaction chamber is still exposed, the packaging structure does not provide comprehensive protection for the Roche coil, the plasma will still cause certain damage to the Roche coil, and there is a certain risk of short circuit in the Roche coil, and the working reliability of the Roche coil still needs to be improved.
[0034] The embodiment of the present application provides a packaging structure of a Rogowski coil, which can achieve better protection for the Rogowski coil, reduce damage to the Rogowski coil by plasma, extend the service life of the Rogowski coil, and ensure that the Rogowski coil has a better detection effect on plasma current. The embodiment of the present application also relates to a nuclear fusion reaction device, and the Rogowski coil can be used to detect plasma current in the nuclear fusion reaction device.
[0035] In an embodiment of the present application, the Roche coil is arranged inside the reaction chamber of the nuclear fusion reaction device during operation to detect the plasma current in the reaction chamber, and the plasma current formed in the reaction chamber can pass through the enclosed area of the Roche coil. If the Roche coil is arranged along the inner wall of the reaction chamber, the shape of the Roche coil can be determined based on the shape of the reaction chamber to facilitate the arrangement in the reaction chamber. The shape of the Roche coil can be the same as the shape of the polar cross-section of the reaction chamber, and the polar cross-section is the plane where the central axis of the reaction chamber is located. In the embodiment of the present application, the Roche coil is roughly D-shaped as an example for illustration. The Roche coil is formed by winding a wrapping wire on a skeleton of a certain shape, and the shape of the Roche coil is actually determined by the shape of the skeleton, so the shape of the skeleton can be D-shaped. In some embodiments, the shape of the Roche coil can also be circular or elliptical. In the embodiment of the present application, the cross-sectional shape of any position of the skeleton is also taken as an example.
[0036] The reaction chamber of the nuclear fusion reaction device is annular, and the plasma current in the reaction chamber is an annular current, so the plasma current can be detected at each position in the annular direction of the reaction chamber. Only one Rogowski coil can be set in the reaction chamber, or multiple Rogowski coils can be set, and each Rogowski coil can be used to detect the plasma current at its location. In the case of setting multiple Rogowski coils, the parameters of the plasma current detected by the multiple Rogowski coils can play a role in mutual verification. The multiple Rogowski coils can be evenly arranged in the reaction chamber.
[0037] Figure 1 It is a schematic diagram of a packaging structure of a Rogowski coil provided in one embodiment of the present application. Figure 1 The figure shows a view of a Rogowski coil packaged with a packaging structure 10. The Rogowski coil is located inside the packaging structure 10, so the Rogowski coil is not shown in the figure. The shape of the packaging structure 10 is basically the same as that of the Rogowski coil. Figure 1 Take the packaging structure that is roughly D-shaped as an example.
[0038] like Figure 1 As shown, the packaging structure 10 includes a plurality of covering components, which are arranged along the circumference of the Rogowski coil and respectively cover different areas of the Rogowski coil. Each covering component can cover a section of the Rogowski coil. Figure 1Take the example that the multiple covering parts include two types of covering parts, and the two covering parts are respectively a first covering part 101 and a second covering part 102. The Rogowski coil may include a plurality of straight strips and bent parts, the first covering part 101 covers the straight strips, and the second covering part 102 covers the bent parts. The shape of the covering part corresponds to the part it covers in the Rogowski coil. The first covering part 101 may be in the shape of a straight strip. The bent part in the Rogowski coil may be in the shape of an arc or a right angle, and accordingly, the second covering part 102 is bent in an arc or at a right angle. The embodiment of the present application takes the second covering part 102 bent in an arc as an example.
[0039] Each covering component includes a first shell and a second shell. The first shell covers the Rogowski coil from the inner side of the Rogowski coil, and the second shell covers the Rogowski coil from the outer side of the Rogowski coil, that is, the first shell and the second shell are buckled from both sides of the Rogowski coil. The opening size of the second shell can be smaller than the opening size of the first shell, and the side edge of the second shell is located in the enclosed space of the first shell.
[0040] The first shell and the second shell in the first covering part 101 are both in the shape of straight strips, and the first shell and the second shell in the second covering part 102 both have arc-shaped areas. The following takes the first covering part 101 as an example to introduce the structure and relationship of the first shell and the second shell in the covering part. For the structure and relationship of the first shell and the second shell in the second covering part 102, you can refer to this introduction, and no additional details are given here. For the convenience of distinction, in the embodiment of the present application, the shell in the first covering part 101 is called a straight shell, and the shell in the second covering part 102 is called a curved shell. Accordingly, the first covering part 101 includes a first straight shell and a second straight shell, and the second covering part 102 includes a first curved shell and a second curved shell.
[0041] Figure 2 is a partial structural diagram of a Rogowski coil and a packaging structure provided in one embodiment of the present application. Figure 2 It can be shown that Figure 1 The detailed structure of the rectangular dotted frame 01 in the figure, and Figure 2 The Rogowski coil 20 is also shown schematically. Figure 1 and Figure 2 The Rogowski coil 20 may include a frame 201 and a wrapped wire 202 wound on the frame 201. The first covering component 101 includes: a first straight shell 1011 covering the inner side of the Rogowski coil 20 and a second straight shell 1012 covering the outer side of the Rogowski coil 20. The opening size of the first straight shell 1011 may be larger than the opening size of the second straight shell 1012, the side edge of the second straight shell 1012 is located in the enclosed space of the first straight shell 1011, and the side of the first straight shell 1011 covers the side edge of the second straight shell 1012.
[0042] In some embodiments, Figure 2 As shown, the two shells in the covering component (such as the first straight shell 1011 and the second straight shell 1012) can respectively press the Rogowski coil 20 from the inside and outside of the Rogowski coil 20. The covering component can not only protect the Rogowski coil 20, but also fix the Rogowski coil 20.
[0043] In the embodiment of the present application, the Roche coil is surrounded by a shell on all sides, which can realize all-round protection of the Roche coil and improve the protection effect of the Roche coil. In addition, the side edge of the second shell near the outside of the Roche coil is located in the enclosed space of the first shell near the inside of the Roche coil, so that even if there is a gap between the first shell and the second shell, the gap is also in the enclosed space of the first shell, and the plasma located in the enclosed area of the Roche coil will not contact the Roche coil through the gap, thereby improving the protection effect of the Roche coil. Accordingly, the damage caused by plasma to the Roche coil can be reduced, the service life of the Roche coil can be extended, and the detection effect of the Roche coil on the plasma current can be ensured to be better.
[0044] In some embodiments, the first shell and the second shell in each covering component in the packaging structure 10 are both in the shape of a U-shaped through groove. For any shell of the first shell and the second shell of each covering component, the shell includes a first strip portion, a second strip portion and a third strip portion connected in sequence, the first strip portion and the third strip portion are arranged opposite to each other, the side of the shell includes the first strip portion and the third strip portion, and the side edge of the shell includes the edge of the first strip portion and the third strip portion away from the second strip portion. There may be some differences in the structures of the first covering component 101 and the second covering component 102. The structures of the first covering component 101 and the second covering component 102 are introduced below in conjunction with the accompanying drawings.
[0045] Figure 3 Schematic diagram of the structure of a first covering component provided by an embodiment of the present application. Figure 3 As shown, the first straight shell 1011 and the second straight shell 1012 in the first covering member 101 each include three strip-shaped portions connected in sequence, and the three strip-shaped portions are all straight strip-shaped, and the first straight shell 1011 and the second straight shell 1012 are in the shape of a U-shaped straight through groove. In order to facilitate the distinction from the second covering member 102, in the embodiment of the present application, the strip-shaped portion included in the shell of the first covering member 101 is referred to as a straight strip portion, and the strip-shaped portion included in the shell of the second covering member 102 is referred to as a curved strip portion.
[0046] Taking the first straight shell 1011 in the first covering member 101 as an example, the first straight shell 1011 may include a first straight strip portion 10111, a second straight strip portion 10112 and a third straight strip portion 10113 connected in sequence. The first straight strip portion 10111 and the third straight strip portion 10113 are arranged opposite to each other, such as being parallel to each other. The first straight strip portion 10111 and the third straight strip portion 10113 may serve as the side portions of the first straight shell 1011, and the second straight strip portion 10112 may serve as the bottom portion of the first straight shell 1011. The side edge of the first straight shell 1011 may be Figure 3 At the position indicated by 10110, the side edges in the second straight shell 1012 are similar.
[0047] The structure of the second straight shell 1012 is similar to that of the first straight shell 1011, and reference may be made to the introduction of the first straight shell 1011. The width of the second straight strip portion in the second straight shell 1012 may be smaller than the width of the second straight strip portion 10112 in the first straight shell 1011, so as to ensure that the side edge of the second straight shell 1012 can be located in the enclosed space of the first straight shell 1011.
[0048] Figure 4 Schematic diagram of the structure of a second covering component provided by an embodiment of the present application. Figure 4 As shown, the second covering component 102 includes a first curved shell 1021 and a second curved shell 1022. The first curved shell 1021 covers the Rogowski coil from the inner side of the Rogowski coil, and the second curved shell 1022 covers the Rogowski coil from the outer side of the Rogowski coil. Accordingly, the first curved shell 1021 is bent toward the side where the groove is located, and the second curved shell 1022 is bent toward the back side of the groove. The first curved shell 1021 and the second curved shell 1022 each include three strip-shaped portions connected in sequence, and the three strip-shaped portions each have an arc-shaped area. The embodiment of the present application takes the example that each strip-shaped portion in the curved shell includes an arc-shaped area and straight strip areas connected at both ends of the arc-shaped area. In some embodiments, each curved strip portion may also include only an arc-shaped area.
[0049] Taking the first curved shell 1021 in the second covering part 102 as an example, the first curved shell 1021 may include a first curved strip portion 10211, a second curved strip portion 10212 and a third curved strip portion 10213 connected in sequence. The first curved strip portion 10211 and the third curved strip portion 10213 are arranged relative to each other, such as being parallel to each other. The first curved strip portion 10211 and the third curved strip portion 10213 are located on the side of the convex of the second curved strip portion 10212. The first curved strip portion 10211 and the third curved strip portion 10213 can serve as the side of the first curved shell 1021, and the second curved strip portion 10212 can serve as the bottom of the first curved shell 1021. The side edge in the first curved shell 1021 can be Figure 4 The location indicated by 10210.
[0050] The structure of the second curved shell 1022 is similar to that of the first curved shell 1021, and reference may be made to the introduction of the first curved shell 1021. The first curved strip portion and the third curved strip portion in the second curved shell 1022 are located on one side of the concave portion of the second curved strip portion. The width of the second curved strip portion in the second curved shell 1022 may be smaller than the width of the second curved strip portion 10212 in the first curved shell 1021, so as to ensure that the side edge of the second curved shell 1022 can be located in the enclosed space of the first curved shell 1021.
[0051] In the embodiment of the present application, the shell in the first covering component 101 can be a sheet metal part, and the thickness of each position in the shell is consistent. Sheet metal refers to a comprehensive cold processing process for metal sheets (usually less than 6 mm), including shearing, punching / cutting / compounding, folding, riveting, splicing, forming and other processing methods. The thickness of the same part prepared by the sheet metal process is consistent. For example, the thickness of the first shell and the second shell in each first covering component 101 can range from 0.3 mm to 0.8 mm, such as 0.4 mm.
[0052] The thickness of each sheet metal part in the packaging structure 10 can adopt the same rule, that is, the thickness of each sheet metal part can be the same. In this way, thin plates of the same specifications can be used for preparation, which simplifies the overall preparation process of the required parts, and the cost of the sheet metal parts is low, which can ensure that the overall cost of the packaging structure is low. For example, all sheet metal parts in the packaging structure 10 can be bent and formed by stainless steel (such as 316L stainless steel).
[0053] In the embodiment of the present application, the shell in the second covering member 102 can be a three-dimensional printed part. Since the shell in the second covering member 102 needs to have an arc-shaped area, it is difficult to achieve it through sheet metal processing, so it can be prepared through a three-dimensional printing process to reduce the preparation cost. And the use of a three-dimensional printing process can ensure that the side of the prepared shell is a whole, without exposed areas, to ensure the protective effect of the Rogowski coil. For example, stainless steel (such as 316L stainless steel) can also be used for three-dimensional printing. The first covering member 101 and the second covering member 102 can also be prepared by machining, which is not limited here.
[0054] The relative magnetic permeability of each shell in the packaging structure 10 can be less than 1.04. The relative magnetic permeability of an object refers to the ratio of the absolute magnetic permeability of the object to the vacuum magnetic permeability. The absolute magnetic permeability is equal to the ratio of the magnetic induction intensity to the magnetic field intensity in the magnetic medium. The relative magnetic permeability of the shell in the second covering component 102 can be less than 1.03. The relative magnetic permeability of the shell in the packaging structure 10 is low. After the packaging structure 10 encapsulates the Rogowski coil, the interference of the magnetic field in the reaction chamber of the nuclear fusion reaction device on the Rogowski coil can be reduced, thereby ensuring the working stability of the Rogowski coil.
[0055] In some embodiments, the width of the first shell in the second covering component 102 may be greater than the width of the first shell in the first covering component 101, and the width of the second shell in the second covering component 102 may also be greater than the width of the second shell in the first covering component 101. For the adjacent first covering component 101 and second covering component 102, the end of the first covering component 101 can extend into the enclosed space of the second covering component 102.
[0056] Figure 5 is a partial structural diagram of another Rogowski coil and packaging structure provided in an embodiment of the present application. Figure 5 It can be shown that Figure 1 The exploded diagram of the structure where the rectangular dotted box 02 is located. Figure 1 , Figure 4 and Figure 5 The middle area of the second covering member 102 is arc-shaped, but the two ends are straight strip-shaped, and the end of the first covering member 101 can be inserted into the straight strip area. By overlapping the first covering member 101 and the second covering member 102, the shell of the same length specification can be used to encapsulate coils of different rules, thereby improving the versatility of the covering member.
[0057] In the embodiment of the present application, the first covering member 101 of various lengths can be designed, and the straight strips of different lengths in the Rogowski coil can be covered with the first covering members 101 of different lengths. For example, Figure 1 In the packaging structure shown, the length of the first covering member 101 used in the upper right corner and the lower right corner is different from the length of the first covering member 101 used in the left and right sides and the upper and lower sides. The cross-sectional dimensions of the first covering members 101 of different lengths can be the same, that is, the cross-sectional dimensions of the included shells can be the same.
[0058] In the embodiment of the present application, the second covering member 102 with different bending angles can also be designed, and the bending portions with different angles in the Rogowski coil can also be wrapped with the second covering members 102 with different bending angles. Figure 1 The bending angles of the two second covering parts 102 at the upper and lower ends of the left side can be 90 degrees, and the bending angles of the four second covering parts 102 at the right side can all be 135 degrees.
[0059] In one fixing method of the covering component, the two shells in the covering component can be clamped to each other. For example, the side parts of the first shell and the second shell have corresponding buckles. After the first shell and the second shell are buckled from the inner and outer sides of the Rogowski coil, the buckles on the shells can be clamped to each other to achieve the fixation of the two shells. The two ends of the adjacent covering components close to each other can also have clamping parts to achieve the clamping of the adjacent covering components.
[0060] Figure 6 FIG. 1 is a schematic diagram of another packaging structure of a Rogowski coil provided in an embodiment of the present application, and shows another fixing method of the covering component. Figure 6 As shown, the packaging structure 10 can further include a plurality of clamps 103 on the basis of the above structure. Each clamp 103 fixes the two adjacent covering parts by covering the ends close to each other of the two adjacent covering parts. The clamp 103 can ensure the connection reliability of the covering parts, and can also prevent plasma from passing through the gap between the adjacent covering parts and reaching the Rogowski coil, further improving the protection effect of the Rogowski coil.
[0061] Figure 7 Schematic diagram of the structure of a clamp provided in one embodiment of the present application. Figure 7 As shown, the clamp 103 may include a clamp body 1031 and a fastener 1032, and the fastener 1032 may be used to lock the clamp body 1031 so that the clamp body 1031 locks the two covered parts it covers. The clamp body 1031 is in an open ring shape, such as the clamp body 1031 may be a sheet metal part. The two ends of the opening of the clamp body 1031 protrude outward from the ring, and the protrusions at both ends have fixing holes, the fixing hole at one end is a light hole, and the fixing hole at the other end is a flanging threaded hole. The fastener 1032 may be a screw, and the screw is inserted from the light hole into the flanging threaded hole and tightened to lock the clamp body 1031. This method does not require the use of nuts for tightening, and can simplify the installation steps of the clamp.
[0062] In one embodiment, the packaging structure 10 also includes an insulating film located between the Rogowski coil and the coating component and wound around the Rogowski coil. The thickness of the insulating film can range from 0.2 mm to 0.4 mm, such as 0.25 mm. The material of the insulating film can be polyimide (PI). The insulating film can prevent the Rogowski coil from directly contacting the coating component, and prevent the wrapping film of the wrapping wire in the Rogowski coil from being damaged by friction with the coating component, resulting in a short circuit of the Rogowski coil, thereby ensuring the working stability of the Rogowski coil. When the packaging structure 10 includes an insulating film, the coating component can contact the insulating film and press the Rogowski coil through the insulating film. In one embodiment, an insulating film can also be wrapped between the skeleton and the wrapping wire in the Rogowski coil to avoid a short circuit between the wrapping wire and the skeleton.
[0063] The following is an introduction to the dimensional relationship of each position in the packaging structure 10 in the embodiment of the present application in conjunction with the accompanying drawings. Figure 8 is a cross-sectional view of a structure obtained after a Rogowski coil is packaged using a packaging structure provided in an embodiment of the present application, and Figure 8 FIG. 1 shows a cross-sectional view of the overlap of the first covering member 101 and the second covering member 102. Figure 8As shown, it is assumed that the rectangular cross-sectional dimensions of the skeleton 201 of the Rogowski coil are W1×H1, and the wire diameter of the winding wire 202 is D; the in-slot width of the second straight shell 1012 in the first covering component 101 is W2, and the in-slot height is H2; the in-slot width of the first straight shell 1011 in the first covering component 101 is W3, and the in-slot height is H3; the thickness of the shell is T2, and the thickness of the insulating film 104 is T1.
[0064] The packaging structure 10 satisfies W3>W2+2T2+0.2. Wherein, W2+2T2 is the outer width of the groove of the second straight shell 1012. Since the side of the second straight shell 1012 is located inside the first straight shell 1011, the inner width of the groove of the first straight shell 1011 is greater than the outer width of the groove of the second straight shell 1012. The "0.2" represents the minimum gap width between the two shells, which is 0.2 mm.
[0065] The packaging structure 10 also satisfies W2>W1+3.5D+3T1. Wherein, W1+2D+2T1 represents that after the wrapping wire 202 is wound on the frame 201 and a layer of insulating film 104 is wound outside the wrapping wire 202, Figure 8 The minimum size in the vertical direction. Since the winding wire will inevitably bend at the corners of the frame 201 and cannot completely fit the corners of the frame 201, the bending of the winding wire will roughly increase the size by 1.5D. There will be an overlapping area when the insulating film 104 is wound, and the two sides in the vertical direction will increase the size by T1. Therefore, the width of the second straight shell 1012 in the slot needs to be greater than W1+3.5D+3T1.
[0066] The package structure 10 also satisfies H1+3.5D+3T1<H2+H3<2H1+7D+6T1. Wherein, H2+H3 represents the sum of the side heights of the two shells 1011 and 1012 in the first covering component 101. Since the sides of the two shells need to overlap and the bottom of the shells need to contact the insulating film 104 to compress the Rogowski coil, the sum of the side heights of the two shells in the slots needs to be greater than Figure 8 The distance between the insulating films 104 in the lateral direction needs to be less than 2 times the distance between the insulating films 104 in the lateral direction. Combining the size increase (1.5D) caused by the bending of the wrapped wire 202 and the size increase (T1) caused by the overlapping of the insulating films 104, it can be obtained that the distance between the insulating films 104 is H1+3.5D+3T1, so H2+H3 can satisfy the above relationship.
[0067] In the embodiment of the present application, during the packaging process of the Rogowski coil using the packaging structure 10, a circle of polyimide film can be firstly wrapped around the surface of the wound Rogowski coil to prevent short circuit caused by contact with metal parts after the winding wire is damaged. Then, the first shell and the second shell with a U-shaped cross-section in the first covering component are buckled and installed to wrap around the inside and outside of the Rogowski coil, and the side of the first shell covers the two side edges of the second shell to prevent the plasma from bombarding the inside of the coil due to the exposure of the side. The first shell and the second shell in the second covering component are buckled at the corner of the coil, and the side of the first shell also covers the two side edges of the second shell. A clamp is used to tighten the connection between the two covering components, so as to achieve the packaging of the Rogowski coil. After the Rogowski coil is packaged using the packaging structure 10, the packaged Rogowski coil is fixed in the reaction chamber of the nuclear fusion reaction device.
[0068] For Rogowski coils of other shapes, this can be achieved by reasonably planning the length of the shell in the first covering component and adjusting the bending angle of the shell in the second covering component. For example, for a toroidal coil, the toroidal shape can be converted into a polygon according to the actual size requirements, and the above packaging method can also be used.
[0069] In an embodiment of the present application, the packaging process of the Roche coil can be carried out outside the reaction chamber of the nuclear fusion reactor, which can simplify the installation and fixing process inside the reaction chamber. The packaging structure can wrap all surfaces of the coil in the packaging structure, and the protection of the Roche coil is more comprehensive. By setting an insulating film, the short circuit of the Roche coil can be avoided and the reliability of the Roche coil can be improved. In addition, the modular design of the packaging structure can be realized by using various coating components, and the coating components can be unified by appropriately adjusting the size of the coating components, thereby reducing the number of components in the packaging structure. The coating components in the packaging structure can be made of sheet metal and three-dimensional printing, which can ensure a relatively low cost.
[0070] In summary, in the packaging structure of the Roche coil provided in the embodiment of the present application, the covering component uses the first shell and the second shell to cover the Roche coil from the inside and outside of the Roche coil respectively, and the side edge of the second shell is located in the enclosed space of the first shell. In this way, the Roche coil is surrounded by the shell all around. In the process of the plasma current passing through the enclosed area of the Roche coil, the shell can block the bombardment of the Roche coil by the plasma, ensuring that all positions of the Roche coil are protected. In addition, the side edge of the second shell near the outside of the Roche coil is located in the enclosed space of the first shell near the inside of the Roche coil, which can prevent the plasma from contacting the Roche coil through the gap between the first shell and the second shell, thereby improving the protection effect of the Roche coil. Therefore, the packaging structure can achieve a better protection effect on the Roche coil, reduce the damage of the plasma to the Roche coil, extend the service life of the Roche coil, and ensure that the Roche coil has a better detection effect on the plasma current.
[0071] The embodiment of the present application also provides a nuclear fusion reaction device, including: a reaction chamber, at least one Rogowski coil located in the reaction chamber, and a packaging structure that wraps each Rogowski coil, the packaging structure being the above-mentioned packaging structure 10. The shape of the Rogowski coil is the same as the polar cross-section shape of the reaction chamber, and the Rogowski coil is fixed to the inner wall of the reaction chamber by the packaging structure; the plasma current formed in the reaction chamber passes through the enclosed area of the Rogowski coil.
[0072] For the nuclear fusion reaction device, please refer to the relevant content in the introduction of the packaging structure 10, which will not be repeated here. Since the packaging structure 10 can better protect the Roche coil, reduce the damage of the plasma to the Roche coil, extend the service life of the Roche coil, and ensure that the Roche coil has a better detection effect on the plasma current. Accordingly, more accurate parameters can be detected for the plasma current, and based on the parameters, the nuclear fusion reaction device can be controlled to operate efficiently and stably, ensuring a better nuclear fusion reaction effect.
[0073] The above describes specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0074] Those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application. In the above embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.
[0075] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not describe all the details in detail, nor do they limit the present application to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well.
Claims
1. A packaging structure of a Rogowski coil, characterized in that: The enclosed area of the Rogowski coil is used for plasma current to pass through; the Rogowski coil includes a plurality of straight strips and a bent portion, wherein the bent portion connects two straight strips extending in different directions; the packaging structure includes a plurality of covering components, wherein the plurality of covering components are arranged along the circumference of the Rogowski coil and respectively cover different areas of the Rogowski coil; The covering component includes a first shell and a second shell, the first shell and the second shell respectively cover the Rogowski coil from the inner and outer sides of the Rogowski coil, and the side edge of the second shell is located in the enclosed space of the first shell; the first shell and the second shell are both in the shape of a U-shaped through groove; for any one of the first shell and the second shell, any one of the shells includes a first strip portion, a second strip portion and a third strip portion connected in sequence, the first strip portion and the third strip portion are arranged oppositely, the side of any one of the shells includes the first strip portion and the third strip portion, and the side edge of any one of the shells includes the edge of the first strip portion and the third strip portion away from the second strip portion; In the first covering part covering the straight portion, the first shell and the second shell are both in the shape of straight strips; in the second covering part covering the bent portion, the first shell and the second shell both have arc-shaped areas, and the first shell is bent toward the side where the groove is located, and the second shell is bent toward the back side of the groove.
2. The packaging structure according to claim 1, characterized in that: For the adjacent first covering member and the second covering member, the end of the first covering member can extend into the enclosed space of the second covering member.
3. The packaging structure according to claim 1, characterized in that: The first shell and the second shell press the Rogowski coil from the inner and outer sides of the Rogowski coil respectively.
4. The packaging structure according to any one of claims 1 to 3, characterized in that: The packaging structure also includes a plurality of clamps; Each clamp fixes the two covering parts by covering the ends of two adjacent covering parts that are close to each other.
5. The packaging structure according to any one of claims 1 to 3, characterized in that: The packaging structure further includes an insulating film located between the Rogowski coil and the covering component and wound around the Rogowski coil.
6. The packaging structure according to any one of claims 1 to 3, characterized in that: The first shell and the second shell in the first covering component are both sheet metal parts, and the first shell and the second shell in the second covering component are three-dimensional printed parts.
7. The packaging structure according to any one of claims 1 to 3, characterized in that: The relative magnetic permeability of the coating component is less than 1.04; And / or, the thickness of the first shell and the second shell are both in the range of 0.3 mm to 0.8 mm.
8. A nuclear fusion reaction device, characterized in that: The nuclear fusion reaction device comprises: a reaction chamber, at least one Rogowski coil located in the reaction chamber, and a packaging structure wrapping each Rogowski coil, wherein the packaging structure is the packaging structure according to any one of claims 1 to 7; The shape of the Rogowski coil is the same as the polar cross-section shape of the reaction chamber, and the Rogowski coil is fixed to the inner wall of the reaction chamber by using the packaging structure; the plasma current formed in the reaction chamber passes through the surrounding area of the Rogowski coil.