Current-carrying structure and commutation transformer

Abstract

The present invention provides a current-carrying structure and a converter transformer, which are applied to the bushing of a DC device and include an installation body, a bushing body, a first support member, and a second support member. One end of the bushing body is fixedly connected to the installation body. The first support member is sleeved on the outer sidewall of the bushing body. One end of the second support member is fixedly connected to the outer sidewall of the first support member, and the other end of the second support member is fixedly connected to the installation body. By supporting the outer sidewall of the bushing body through the first support member and the second support member, the present invention reduces the length of the part of the bushing body in a cantilever state, and part of the gravity of the bushing body can be supported by the first support member, thereby reducing the force between the bushing body and the installation body and keeping the force between the bushing body and the installation body uniform, thus improving the stability and service life of the current-carrying structure and the converter transformer.

Description

Technical Field

[0001] The present invention relates to the field of DC equipment, and particularly to a current-carrying structure and a converter transformer. Background Art

[0002] As one of the most important components of DC main equipment at home and abroad currently, the DC equipment bushing is mainly used for connecting the internal leads of the valve side winding of the converter transformer to other external equipment, and at the same time has insulation performance under the same voltage environment, and is also used to connect and pass through the equipment inside and outside the valve hall of the converter station. When installing the DC equipment bushing, the DC equipment bushing can be directly detachably connected to the DC main equipment body. However, the traditional DC equipment bushing is in a long cantilever state for a long time during use, and affected by factors such as the self-gravity of the DC equipment bushing, installation and operation vibration, and strong wind, it will cause uneven stress in the connection of the current-carrying conductor inside the DC equipment bushing, and irregular indentations will appear on the metal guide rod of the current-carrying part of the DC equipment bushing, thereby increasing the loop resistance of the current-carrying system of the DC equipment bushing, reducing the current-carrying capacity, intensifying the local heating condition of the DC equipment bushing, and thus making the operation safety and stability of the DC equipment bushing low. Summary of the Invention

[0003] Based on this, in view of the problem of low operation safety and stability of the traditional DC equipment bushing, it is necessary to provide a current-carrying structure and a converter transformer.

[0004] The technical solution is as follows:

[0005] On the one hand, a current-carrying structure is provided, which is applied to the bushing of DC equipment and includes:

[0006] An installation body;

[0007] A bushing body, one end of the bushing body is fixedly connected to the installation body;

[0008] A first support member, the first support member is sleeved on the outer side wall of the bushing body; and

[0009] A second support member, one end of the second support member is fixedly connected to the outer side wall of the first support member, and the other end of the second support member is fixedly connected to the installation body.

[0010] The technical solution is further described below:

[0011] In one embodiment, there are at least two second support members, and each of the second support members is arranged at intervals around the central axis of the first support member.

[0012] In one embodiment, the central axis of the second support member is arranged at an angle with the central axis of the first support member.

[0013] In one embodiment, one end of the second support member is provided with a first connection portion, and the contour shape of the first connection portion is adapted to the contour shape of the outer side wall of the second support member, so that the first connection portion is in surface contact with and fixedly connected to the outer side wall of the second support member; and / or, the other end of the second support member is provided with a second connection portion, and the contour shape of the second connection portion is adapted to the contour shape of the side of the mounting body close to the sleeve body, so that the second connection portion is in surface contact with and fixedly connected to the side of the mounting body close to the sleeve body.

[0014] In one embodiment, the current-carrying structure further includes a locking member, and when the first support member is sleeved on the outer side wall of the sleeve body, the locking member can lock and cooperate the first support member and the sleeve body.

[0015] In one embodiment, the first support member is a hoop, an opening is provided on the outer side wall of the hoop, and a first flange and a second flange which are spaced apart are provided on two sides of the hoop close to the opening. Both the first flange and the second flange extend along the radial direction of the hoop and away from the sleeve body. The current-carrying structure further includes an elastic member, and the elastic member is arranged between the first flange and the second flange. When the hoop is sleeved on the outer side wall of the sleeve body, the locking member can lock the first flange, the elastic member and the second flange into one body, so that the hoop and the sleeve body are locked and cooperate.

[0016] In one embodiment, the first flange is provided with a first through hole, the second flange is provided with a second through hole corresponding to the first through hole, and the locking member is a bolt. When the hoop is sleeved on the outer side wall of the sleeve body, the bolt can pass through the first through hole and the second through hole and lock the first flange, the elastic member and the second flange into one body.

[0017] In one embodiment, conduction can occur between the second support members and between the second support member and the mounting body, so that the sleeve body, the first support member, the second support member and the mounting body can cooperate to form a current-carrying loop.

[0018] In one embodiment, the sleeve body is provided with a conductive tube, the mounting body is provided with a terminal, one end of the conductive tube is sleeved on the outer side wall of the terminal, and conduction can occur between the conductive tube and the terminal.

[0019] On the other hand, a commutation transformer is provided, which is characterized by including the current-carrying structure.

[0020] In the current-carrying structure and commutation transformer in the above embodiments, during use, while the installation body can directly support one end of the bushing body, it can also support the outer wall of the bushing body through the first support member and the second support member, reducing the length of the part of the bushing body in a cantilever state. As a result, the influence on the connection strength between the bushing body and the installation body when the bushing body is affected by factors such as its own gravity, installation and operation vibrations, and strong winds is reduced, ensuring that the position of the bushing body relative to the installation body can be fixed, and the force between the bushing body and the installation body is evenly distributed. Thus, it is ensured that the installation body and the bushing body can stably and reliably carry current, and both the installation body and the bushing body generate heat evenly, improving the stability and safety of the operation of the current-carrying structure and the commutation transformer. Additionally, by providing the first support member and the second support member, part of the gravity of the bushing body can also be supported by the first support member, thereby reducing the force between the bushing body and the installation body, ensuring that the installation body and the bushing body can be stably and reliably fixedly connected and carry current, and improving the stability and service life of the current-carrying structure and the commutation transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of a current-carrying structure for an embodiment;

[0024] Figure 2 For Figure 1 Structural schematic diagram of the support assembly;

[0025] Figure 3 For Figure 2 Structural schematic diagram of the support assembly from another perspective.

[0026] Description of the reference numerals:

[0027] 10. Current-carrying structure; 100. Installation body; 110. Terminal; 200. Bushing body; 210. Conductive tube; 300. First support member; 310. First flange; 320. Second flange; 400. Second support member; 410. First connection portion; 420. Second connection portion; 500. Locking member. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] As Figure 1 and Figure 2 shown, in one embodiment, a current-carrying structure 10 is provided, which is applied to the bushing of a DC device and includes an installation body 100, a bushing body 200, a first support member 300, and a second support member 400. One end of the bushing body 200 is fixedly connected to the installation body 100. The first support member 300 is sleeved on the outer sidewall of the bushing body 200. One end of the second support member 400 is fixedly connected to the outer sidewall of the first support member 300, and the other end of the second support member 400 is fixedly connected to the installation body 100.

[0030] For the current-carrying structure 10 in the above embodiment, during use, while the installation body 100 can directly support one end of the bushing body 200, it can also support the outer sidewall of the bushing body 200 through the first support member 300 and the second support member 400, so that the length of the part of the bushing body 200 in the cantilever state is reduced. Furthermore, the influence on the connection strength between the bushing body 200 and the installation body 100 when the bushing body 200 is affected by factors such as its own gravity, installation and operation vibrations, and strong winds is reduced, ensuring that the position of the bushing body 200 relative to the installation body 100 can be kept fixed, and the force between the bushing body 200 and the installation body 100 is evenly distributed. Thus, it is ensured that the installation body 100 and the bushing body 200 can stably and reliably carry current, and both the installation body 100 and the bushing body 200 generate heat evenly, improving the stability and safety of the operation of the current-carrying structure 10. In addition, by providing the first support member 300 and the second support member 400, part of the gravity of the bushing body 100 can also be supported by the first support member 300, thereby reducing the force between the bushing body 200 and the installation body 100, and ensuring that the installation body 100 and the bushing body 200 can be stably and reliably fixedly connected and carry current, improving the stability and service life of the current-carrying structure 10.

[0031] Among them, the DC device can be a converter transformer, a DC power distribution device, a DC power supply system, or other devices.

[0032] Among them, the installation body 100 can be an installation base, an installation cover plate or other installation structures. Electrical conduction can be achieved between the installation body 100 and the sleeve body 200.

[0033] As Figure 1 shown, optionally, the sleeve body 200 is provided with a conductive tube 210, and the installation body 100 is provided with a terminal 110. One end of the conductive tube 210 is sleeved on the outer side wall of the terminal 110, and electrical conduction can be achieved between the conductive tube 210 and the terminal 110. In this way, the current-carrying structure 10 in this embodiment can be obtained by transforming the traditional DC equipment sleeve, and the transformation is convenient, with strong popularization value. In addition, one end of the conductive tube 210 is sleeved on the outer side wall of the terminal 110, increasing the contact area between the sleeve body 200 and the installation body 100, thereby improving the smoothness and reliability of the current transfer from the sleeve body to the installation body 100, and thus improving the stability and reliability of the current-carrying structure 10.

[0034] Among them, the sleeve body 200 further includes an insulating sheath disposed outside the conductive tube 210, thus improving the safety of the current-carrying structure 10.

[0035] As Figure 1 and Figure 2 shown, optionally, electrical conduction can be achieved between the second support member 400 and the second support member 400, and between the second support member 400 and the installation body 100, so that the sleeve body 200, the first support member 300, the second support member 400 and the installation body 100 can cooperate to form a current-carrying loop. In this way, both the current-carrying loop formed by the cooperation of the sleeve body 200, the conductive tube 210, the terminal 110 and the installation body 100, and the current-carrying loop that can be formed by the cooperation of the sleeve body 200, the first support member 300, the second support member 400 and the installation body 100 can carry current, avoiding the decrease in the current-carrying capacity of the current-carrying loop formed by the cooperation of the sleeve body 200, the conductive tube 210, the terminal 110 and the installation body 100, resulting in a significant increase in the local carrying flow of the current-carrying structure 10 and ultimately developing into local overheating of the current-carrying structure 10, and improving the reliability and safety of the current-carrying structure 10. Moreover, both the current-carrying loop formed by the cooperation of the sleeve body 200, the conductive tube 210, the terminal 110 and the installation body 100, and the current-carrying loop that can be formed by the cooperation of the sleeve body 200, the first support member 300, the second support member 400 and the installation body 100 can carry current, improving the current-carrying capacity of the current-carrying structure 10 and the applicability of the current-carrying structure 10.

[0036] Among them, both the first support member 300 and the second support member 400 can be made of conductive materials such as copper or alloy, or a conductive layer can be provided on the outer walls of the first support member 300 and the second support member 400, or wires can be provided inside the first support member 300 and the second support member 400, as long as the sleeve body 200, the first support member 300, the second support member 400, and the mounting body 100 can cooperate to form a current-carrying loop.

[0037] Among them, the first support member 300 can be a hoop, a sleeve, or other support structures. The second support member 400 can be a support rod, a support tube, a support plate, or other support structures. One end of the second support member 400 is fixedly connected to the outer side wall of the first support member 300, and the other end of the second support member 400 is fixedly connected to the mounting body 100, both of which can be connected by means of clamping, plugging, screwing, welding, or other detachable connection methods. Specifically, in this embodiment, one end of the second support member 400 is fixedly welded to the outer side wall of the first support member 300, and the other end of the second support member 400 is fixedly screwed to the mounting body 100. In this way, the second support member 400 is detachable from the mounting body 100, improving the convenience and reliability of the assembly of the current-carrying structure 10; and the second support member 400 and the first support member 300 can be connected as a whole, improving the assembly efficiency of the current-carrying structure 10.

[0038] Such as Figure 1 , Figure 2 and Figure 3 As shown in the figure, in one embodiment, there are at least two second support members 400, and the respective second support members 400 are arranged at intervals around the central axis of the first support member 300. In this way, by increasing the number of the second support members 400, the contact area between the first support member 300 and the second support member 400 is increased, thereby increasing the screwing strength between the first support member 300 and the second support member 400, so that the first support member 300 and the second support member 400 can stably and reliably fix and cooperate the mounting body 100 and the sleeve body 200, improving the reliability and stability of the current-carrying structure 10. In addition, by increasing the number of the second support members 400, the number of current-carrying loops that can be formed by the cooperation of the sleeve body 200, the first support member 300, the second support member 400, and the mounting body 100 is increased, further improving the current-carrying capacity and service life of the current-carrying structure 10.

[0039] Among them, the number of the second support members 400 can be flexibly adjusted according to actual usage needs. For example, the number of the second support members 400 is three, four, five, etc. Specifically, in this embodiment, the number of the second support members 400 is four, and the four second support members 400 are evenly arranged at intervals around the central axis of the first support member 300. In this way, the stability and current-carrying capacity of the current-carrying structure 10 are improved.

[0040] Furthermore, the central axis of the second support member 400 is arranged at an angle with the central axis of the first support member 300. In this way, the second support member 400 located above the first support member 300 can form a vertically upward component force on the first support member 300 to pull the first support member 300, and the second support member 400 located below the first support member 300 can form a vertically upward component force on the first support member 300 to support the first support member 300, so that the first support member 300 can stably and reliably support the sleeve body 100, improving the reliability and stability of the current-carrying structure 10.

[0041] Wherein, the included angle between the central axis of the second support member 400 and the central axis of the first support member 300 can be flexibly adjusted according to actual usage requirements. For example, the value range of the included angle between the central axis of the second support member 400 and the central axis of the first support member 300 is 30° to 60°. Specifically, the included angle between the central axis of the second support member 400 and the central axis of the first support member 300 is 45° or 60°, etc.

[0042] As Figure 2 and Figure 3 shown, optionally, one end of the second support member 400 is provided with a first connecting portion 410, and the contour shape of the first connecting portion 410 is adapted to the contour shape of the outer side wall of the second support member 400, so that the first connecting portion 410 is in surface contact with and fixedly connected to the outer side wall of the second support member 400. In this way, the contact area between the first connecting portion 410 and the first support member 300 is increased, so that the connection strength between the second support member 400 and the first support member 300 is increased, and further the second support member 400 and the first support member 300 can stably and reliably fix and cooperate the installation body 100 and the sleeve body 200, thereby improving the reliability and stability of the current-carrying structure 10. In addition, the contact area between the first connecting portion 410 and the first support member 300 is increased, ensuring that the current on the first support member 300 can be stably, smoothly and evenly transmitted to the second support member 400, improving the stability and reliability of the current-carrying structure 10 in carrying current.

[0043] Wherein, the first connecting portion 410 can be a connecting block, a connecting piece or other connecting structures.

[0044] As Figure 2 and Figure 3As shown, optionally, the other end of the second support member 400 is provided with a second connection portion 420, and the contour shape of the second connection portion 420 is adapted to the contour shape of the side of the mounting body 100 close to the sleeve body 200, so that the second connection portion 420 is in surface contact with and fixedly connected to the side of the mounting body 100 close to the sleeve body 200. In this way, the contact area between the second connection portion 420 and the mounting body 100 is increased, so that the connection strength between the second support member 400 and the mounting body 100 is increased. Furthermore, the second support member 400 and the first support member 300 can stably and reliably fix and cooperate the mounting body 100 and the sleeve body 200, thereby improving the reliability and stability of the current-carrying structure 10. In addition, the contact area between the second connection portion 420 and the mounting body 100 is increased, ensuring that the current on the second support member 400 can be stably, smoothly, and evenly transmitted to the mounting body 100, improving the stability and reliability of the current-carrying structure 10 in carrying current.

[0045] Among them, the second connection portion 420 can be a connection block, a connection piece or other connection structures.

[0046] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, the current-carrying structure 10 further includes a locking member 500. When the first support member 300 is sleeved on the outer sidewall of the sleeve body 200, the locking member 500 can lock and cooperate the first support member 300 and the sleeve body 200. When the first support member 300 is sleeved on the outer sidewall of the sleeve body 200, adjust the locking member 500 so that the first support member 300 and the sleeve body 200 can be locked into one body. Furthermore, the first support member 300 and the second support member 400 can stably and reliably cooperate to support the sleeve body 200, improving the stability and reliability of the current-carrying structure 10. When it is necessary to separate the first support member 300 and the sleeve body 200, adjust the locking member 500 so that the locking cooperation between the first support member 300 and the sleeve body 200 is released. Furthermore, the first support member 300 can move along the outer sidewall of the sleeve body 200 to separate the hoop from the sleeve body 200, improving the convenience of assembling the current-carrying structure 10.

[0047] Among them, the locking member 500 can be a bolt, a bolt pin, a buckle or other locking structures.

[0048] As Figure 1 , Figure 2 and Figure 3As shown in the figure, further, the first support member 300 is a hoop. An opening is provided on the outer sidewall of the hoop. On both sides of the hoop near the opening, a first flange 310 and a second flange 320 are provided at intervals. Both the first flange 310 and the second flange 320 extend along the radial direction of the hoop and away from the side of the sleeve body 200. The current-carrying structure 10 further includes an elastic member. The elastic member is arranged between the first flange 310 and the second flange 320. When the hoop is sleeved on the outer sidewall of the sleeve body 200, the locking member 500 can lock the first flange 310, the elastic member, and the second flange 320 into one body, so that the hoop and the sleeve body 200 are locked and matched. In this way, during the assembly process, the elastic member can fill the gap between the first flange 310 and the second flange 320 to buffer the fixing force between the first flange 310 and the second flange 320 and be compressed and deformed. When the first flange 310, the elastic member, the second flange 320, and the locking member 500 are locked into one body, the elastic member releases elastic potential energy, so that the elastic member can apply a pre-tightening force to the first flange 310 and the second flange 320, avoiding loosening between the first flange 310 and the second flange 320 after the current-carrying structure 10 is used for a period of time, and further affecting the stability of carrying current between the sleeve body 200 and the first support member 300, thereby improving the stability and reliability of the current-carrying structure 10.

[0049] Among them, the elastic member can be an elastic metal sheet, an elastic silica gel sheet, an elastic rubber pad, or other elastic structures.

[0050] Optionally, the first flange 310 is provided with a first through hole, and the second flange 320 is provided with a second through hole corresponding to the first through hole. The locking member 500 is a bolt. When the hoop is sleeved on the outer sidewall of the sleeve body 200, the bolt can pass through the first through hole and the second through hole and lock the first flange 310, the elastic member, and the second flange 320 into one body. In this way, the reliability of the current-carrying structure 10 and the convenience of assembly are improved.

[0051] Among them, the number of the first through hole, the second through hole, and the bolt can all be flexibly adjusted according to actual use needs. For example, the number of the first through hole, the second through hole, and the bolt can all be one, two, three, etc.

[0052] In one embodiment, a converter transformer is provided, including the current-carrying structure 10 in any of the above embodiments.

[0053] In the converter transformer of the above embodiments, during use, when the installation body 100 can directly support one end of the bushing body 200, it can also support the outer wall of the bushing body 200 through the first support member 300 and the second support member 400, so that the length of the part of the bushing body 200 in the cantilever state is reduced. Furthermore, the influence on the connection strength between the bushing body 200 and the installation body 100 when the bushing body 200 is affected by factors such as its own gravity, installation and operation vibrations, and strong winds is reduced, ensuring that the position of the bushing body 200 relative to the installation body 100 can be fixed, and the force between the bushing body 200 and the installation body 100 is evenly distributed. Thus, it is ensured that the installation body 100 and the bushing body 200 can stably and reliably carry current, and both the installation body 100 and the bushing body 200 generate heat evenly, improving the stability and safety of the operation of the converter transformer. In addition, by providing the first support member 300 and the second support member 400, part of the gravity of the bushing body 100 can also be supported by the first support member 300, thereby reducing the force between the bushing body 200 and the installation body 100, and ensuring that the installation body 100 and the bushing body 200 can be stably and reliably fixedly connected and carry current, improving the stability and service life of the converter transformer.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0056] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0058] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0059] It should also be understood that when interpreting the connection relationship or position relationship of elements, although not explicitly described, the connection relationship and position relationship are interpreted to include an error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately" or "substantially" may mean within one or more standard deviations, which is not limited herein.

[0060] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0061] The above embodiments merely illustrate several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A current-carrying structure is applied to the bushing of a DC device, and is characterized in that, Comprising: Installation body; Casing body, one end of the casing body is fixedly connected to the installation body; First support member, the first support member is sleeved on the outer side wall of the casing body; and Second support member, one end of the second support member is fixedly connected to the outer side wall of the first support member, and the other end of the second support member is fixedly connected to the installation body; Wherein, the casing body is provided with a conductive tube, the installation body is provided with a terminal, one end of the conductive tube is sleeved on the outer side wall of the terminal, and electricity can be conducted between the conductive tube and the terminal, so that a current-carrying loop is formed by the cooperation of the casing body, the conductive tube, the terminal and the installation body; Electricity can be conducted between the first support member and the second support member, and between the second support member and the installation body, so that a current-carrying loop can be formed by the cooperation of the casing body, the first support member, the second support member and the installation body.

2. The current-carrying structure according to claim 1, characterized in that, There are at least two second support members, and each of the second support members is arranged at intervals around the central axis of the first support member.

3. The current-carrying structure according to claim 2, characterized in that, The central axis of the second support member is arranged at an angle with the central axis of the first support member.

4. The current-carrying structure according to claim 1, characterized in that, One end of the second support member is provided with a first connecting portion, and the contour shape of the first connecting portion is adapted to the contour shape of the outer side wall of the second support member, so that the first connecting portion is in surface contact and fixedly connected with the outer side wall of the second support member; and / or, the other end of the second support member is provided with a second connecting portion, and the contour shape of the second connecting portion is adapted to the contour shape of the side of the installation body close to the casing body, so that the second connecting portion is in surface contact and fixedly connected with the side of the installation body close to the casing body.

5. The current-carrying structure according to claim 1, characterized in that, The current-carrying structure further includes a locking member, and when the first support member is sleeved on the outer side wall of the casing body, the locking member can lock and cooperate the first support member and the casing body.

6. The current-carrying structure according to claim 5, characterized in that, The first support member is a hoop, an opening is provided on the outer side wall of the hoop, and a first flange and a second flange which are arranged at intervals are provided on two sides of the hoop close to the opening. Both the first flange and the second flange extend along the radial direction of the hoop and away from the casing body. The current-carrying structure further includes an elastic member, and the elastic member is arranged between the first flange and the second flange. When the hoop is sleeved on the outer side wall of the casing body, the locking member can lock the first flange, the elastic member and the second flange into one body, so that the hoop and the casing body are locked and cooperate.

7. The current-carrying structure according to claim 6, characterized in that, The first flange is provided with a first through hole, the second flange is provided with a second through hole corresponding to the first through hole, and the locking member is a bolt. When the hoop is sleeved on the outer side wall of the casing body, the bolt can pass through the first through hole and the second through hole and lock the first flange, the elastic member and the second flange into one body.

8. A commutation transformer, characterized in that, Comprising the current-carrying structure according to any one of claims 1 to 7.

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