Connecting device

Abstract

The invention relates to a connecting device. The connecting device comprises a first conductor, a second conductor and a connecting conductor, the second conductor is located on one side of the first conductor. The connecting conductor is made of a flexible material and is provided with a connecting groove, the connecting groove extends in the distribution direction of the first conductor and the second conductor, one end of the connecting conductor is conductively connected to the first conductor, and the second conductor can be conductively connected to the other end of the connecting conductor in a sliding manner in the connecting groove. According to the scheme, stress caused by thermal expansion and cold contraction can be absorbed through self deformation of the connecting conductor and sliding of the connecting conductor relative to the second conductor, and stress generated by vibration of the transformer in the using process of the transformer can also be absorbed through self deformation of the connecting conductor and sliding of the connecting conductor relative to the second conductor; when the high-voltage GIS and the transformer are assembled, the assembly deviation between the first conductor and the second conductor caused by the possible position deviation between the high-voltage GIS and the transformer can be absorbed under the deformation of the connecting conductor, so that the high-voltage GIS and the transformer are more convenient to assemble.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, and in particular relates to a connecting device. BACKGROUND

[0002] As a key hub of power transmission and distribution, the safe and stable operation of the core equipment, transformer and high-voltage switch equipment (such as GIS), of the substation is crucial. With the continuous development of the power industry and the rising demand for electricity, ensuring reliable electrical connection between the transformer and the high-voltage GIS equipment has become a key link to improve the reliability and stability of the power supply system.

[0003] During the construction of the substation, after the transformer and the high-voltage GIS are assembled in place, on-site insulation withstand voltage tests need to be carried out independently. When the transformer and the high-voltage GIS are connected by an oil-gas bushing, a reliable insulation withstand voltage break needs to be formed between the transformer insulation bushing and the high-voltage GIS, and insulation withstand voltage tests need to be carried out independently. After the insulation withstand voltage tests of the transformer and the high-voltage GIS, reliable electrical connection needs to be made before they can be put into long-term operation.

[0004] However, the existing electrical connection device still has significant technical bottlenecks. On the one hand, during long-term operation, it cannot effectively cope with the thermal expansion and contraction stress of the conductor caused by changes in environmental temperature. This stress accumulation can cause loosening of the connection site, increase in contact resistance, and even cause electrical connection failure. On the other hand, it is difficult to withstand the vibration stress generated during the operation of the transformer, and is prone to fatigue damage of the connection components under long-term vibration. In addition, due to the inevitable position deviations of the GIS and the transformer during on-site installation, the existing connection device cannot achieve high-precision self-adaptive adjustment, thereby affecting the reliability and stability of the electrical connection. These technical defects seriously restrict the long-term safe and stable operation of the substation equipment, and urgent technical solutions are needed to solve them. SUMMARY

[0005] Therefore, it is necessary to provide a connecting device to solve the problem that the existing electrical connection device between the GIS and the transformer cannot cope with thermal stress, vibration and assembly position deviation.

[0006] A connecting device, comprising a first conductor, a second conductor and a connecting conductor; the second conductor is located on one side of the first conductor. The connecting conductor is made of a flexible material, the connecting conductor is provided with a connecting slot, the connecting slot extends in the distribution direction of the first conductor and the second conductor, one end of the connecting conductor is electrically connected to the first conductor, and the second conductor is electrically connected to the other end of the connecting conductor in the connecting slot.

[0007] In one of the embodiments, the connecting device further comprises a transition conductor, which is located on the side of the second conductor away from the first conductor, and the transition conductor is electrically connected with the second conductor.

[0008] In one of the embodiments, the connecting device further comprises a shielding cover, which is in a cylindrical shape, and one end of the shielding cover is connected with the first conductor, and the other end of the shielding cover is sleeved on the outer periphery of the transition conductor, and the second conductor and the connecting conductor are located inside the shielding cover.

[0009] In one of the embodiments, the outer wall of the shielding cover is provided with an arc-shaped chamfer at the end of the shielding cover sleeved on the outer periphery of the transition conductor.

[0010] In one of the embodiments, the connecting device further comprises an insulating pad, which is made of insulating material, and the insulating pad is located inside the shielding cover, and the portions of the first conductor, the second conductor, the connecting conductor and the transition conductor located inside the shielding cover do not protrude from the surface of the insulating pad.

[0011] In one of the embodiments, the insulating pad is in a ring shape, the insulating pad is connected with the transition conductor, the outer diameter of the insulating pad is greater than the maximum diameter of the portion of the connecting conductor located inside the shielding cover, and the inner diameter of the insulating pad is not less than the outer diameter of the second conductor to be sleeved on the outside of the second conductor.

[0012] In one of the embodiments, the first conductor comprises a top end portion and a first connecting portion connected with each other, the diameter of the top end portion is greater than the diameter of the first connecting portion, and the top end portion is located on the side of the first connecting portion away from the second conductor, the shielding cover is connected with the surface of the top end portion, and the connecting conductor is connected with the surface of the first connecting portion.

[0013] In one of the embodiments, the second conductor is located in the extension direction of the axial direction of the first conductor, and the connecting groove extends in the axial direction of the first conductor, and the second conductor can slide in the axial direction of the first conductor relative to the connecting conductor along the connecting groove.

[0014] In one of the embodiments, the second conductor comprises a bottom end portion and a second connecting portion connected with each other, the bottom end portion is connected with the transition conductor, and the diameter of the second connecting portion is smaller than the diameter of the bottom end portion.

[0015] In one of the embodiments, the connecting device further comprises a compression ring, which is sleeved on the outer periphery of the second connecting portion and the inner diameter of the compression ring is smaller than the diameter of the bottom end portion, and the compression ring is fixedly connected with the transition conductor.

[0016] The connecting device provided by the above scheme can absorb the stress caused by thermal expansion and contraction by the deformation of the connecting conductor itself and the sliding of the connecting conductor relative to the second conductor when thermal stress is generated between the first conductor and the second conductor due to thermal expansion and contraction of the first conductor and the second conductor or other expansion elements. On the other hand, the stress generated by the vibration of the transformer during the use of the transformer can also be absorbed by the deformation of the connecting conductor itself and the sliding of the connecting conductor relative to the second conductor. In addition, the assembly deviation between the first conductor and the second conductor caused by the positional deviation of the high-voltage GIS and the transformer during the assembly of the high-voltage GIS and the transformer can also be absorbed by the deformation of the connecting conductor itself, thereby facilitating the assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the use scene of the connecting device in an embodiment of the present application.

[0018] Figure 2 The figure is a schematic diagram of the use of the connecting device in an embodiment of the present application.

[0019] Figure 3 The figure is a schematic diagram of the structure of the connecting device in an embodiment of the present application. Figure 2 The figure is a schematic diagram of the structure of the connecting device in an embodiment of the present application.

[0020] BRIEF DESCRIPTION OF DRAWINGS: 100, connecting device; 110, first conductor; 111, top end portion; 112, first connecting portion; 113, first connecting hole; 120, second conductor; 121, bottom end portion; 122, second connecting portion; 131, connecting groove; 130, connecting conductor; 140, transition conductor; 141, second connecting hole; 150, shielding cover; 160, insulating pad; 170, compression ring; 200, high-voltage GIS; 300, transformer oil gas sleeve; 310, insulating sleeve; 400, fracture; 500, shell; 510, hand hole. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application 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 spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0022] It is to be noted that when a component is referred to as being "on" or "situated on" or "disposed on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in the description of the specification are for the purpose of illustration only and do not indicate the only position of the embodiment.

[0023] In addition, the terms "first", "second", and the like, are used only to describe the names of the features and do not indicate or imply relative importance or a number of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the specification, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0026] Figure 1 A schematic diagram showing the use scenario of the connecting device 100 in an embodiment of the present application is shown. As shown in Figure 1 In the field of electrical transformers, an insulation break 400 is provided between the transformer oil gas sleeve 300 and the high-voltage GIS 200. Figure 2 A schematic diagram showing the use of the connecting device 100 in an embodiment of the present application is shown. As shown in Figure 2 The connecting device 100 provided in an embodiment of the present application is connected between the transformer oil gas sleeve 300 and the high-voltage GIS 200, so that the two can be conductively connected.

[0027] In combinationFigure 1 and Figure 2 As shown in Figure 3 , the connecting device 100 comprises a first conductor 110, a second conductor 120 and a connecting conductor 130.

[0028] The first conductor 110 and the second conductor 120 are both pieces of conductive material, the first conductor 110 is used to connect the high-voltage GIS 200. The second conductor 120 is used to connect the transformer oil gas sleeve 300 through the transition conductor 140 described below, so as to realize the conductive connection between the transformer and the high-voltage GIS 200 through the connecting device 100.

[0029] As shown in Figure 3 , in the embodiment, the first conductor 110 is provided with a first connecting hole 113 on the side end face away from the second conductor 120 for connecting the high-voltage GIS 200, and a fastener such as a fastening bolt is used to realize the connection between the first conductor 110 and the high-voltage GIS 200.

[0030] As shown in Figure 3 , the second conductor 120 is located on one side of the first conductor 110. In the embodiment, the second conductor 120 is located in the extension direction of the first conductor 110 in its own axial direction. In the illustration, the second conductor 120 is shown as being located below the first conductor 110, but this is not limiting.

[0031] The connecting conductor 130 is used to conductively connect the first conductor 110 and the second conductor 120, and the connecting conductor 130 is a piece of conductive material. At the same time, as shown in Figure 3 , the connecting conductor 130 is a piece of flexible material. For example, it can be a metal wire row or the like. One end of the connecting conductor 130 is conductively connected to the first conductor 110, and the second conductor 120 is slidably conductively connected to the other end of the connecting conductor 130 in the connecting groove 131, so that the first conductor 110 and the second conductor 120 are conductively connected.

[0032] As shown in Figure 3 , the connecting conductor 130 is provided with a connecting groove 131, and the connecting groove 131 extends in the distribution direction of the first conductor 110 and the second conductor 120. In the embodiment, the connecting conductor 130 is located in the extension direction of the first conductor 110 in its own axial direction, so the connecting groove 131 extends in the axial direction of the first conductor 110.

[0033] Since the connecting conductor 130 is made of flexible material and the second conductor 120 can slide along the connecting groove 131 relative to the connecting conductor 130, when thermal stress is generated between the first conductor 110 and the second conductor 120 due to thermal expansion or other expansion elements, the stress caused by thermal expansion can be absorbed by the deformation of the connecting conductor 130 itself and the sliding of the connecting conductor 130 relative to the second conductor 120. On the other hand, the stress generated by the vibration of the transformer during use can also be absorbed by the deformation of the connecting conductor 130 itself and the sliding of the connecting conductor 130 relative to the second conductor 120. In addition, during the assembly of the high-voltage GIS 200 and the transformer oil and gas sleeve 300, the assembly deviation between the first conductor 110 and the second conductor 120 caused by the possible positional deviation of the two can also be absorbed by the deformation of the connecting conductor 130 itself, thereby facilitating the assembly.

[0034] As shown in Figure 3 , in one embodiment, the connecting device 100 further comprises a transition conductor 140 made of electrically conductive material, which is combined Figure 2 with the insulating sleeve 310 of the transformer oil and gas sleeve 300 and electrically connected with the internal conductor of the transformer oil and gas sleeve 300.

[0035] As shown in Figure 3 , the transition conductor 140 is located on the side of the second conductor 120 away from the first conductor 110, and the transition conductor 140 and the second conductor 120 are electrically connected. In this embodiment, the second conductor 120 and the transition conductor 140 are in direct contact to achieve electrical connection between them, but this is not limiting, and in other embodiments, they can also be indirectly connected through other electrically conductive materials.

[0036] As shown in Figure 3 , in this embodiment, a second connecting hole 141 is formed at the end of the transition conductor 140 away from the second conductor 120, and the transition conductor 140 is connected to the second connecting hole 141 through a fastener such as a fastening bolt to achieve the connection between the transition conductor 140 and the insulating sleeve 310.

[0037] As shown in Figure 3 , in one embodiment, the connecting device 100 further comprises a shielding cover 150 for insulation shielding and controlling and optimizing the electric field distribution, thereby ensuring the safe, reliable and efficient operation of the equipment. In this embodiment, the shielding cover 150 is made of aluminum alloy pipe material, but this is not limiting.

[0038] As shown in Figure 3As shown, the shielding cover 150 is in a cylindrical shape, and one end of the shielding cover 150 is connected to the first conductor 110, and the other end is sleeved on the outer periphery of the transition conductor 140, and the second conductor 120 and the connecting conductor 130 are both located inside the shielding cover 150, so as to improve the insulation performance of the connecting device 100 and improve the insulation reliability thereof.

[0039] In one of the embodiments, the smoothness of the outer surface of the shielding cover 150 is not greater than 3.2 microns, which can be achieved by polishing treatment, so as to improve the electric field distribution, thereby preventing partial discharge (corona) and breakdown.

[0040] As shown in the drawings, Figure 3 In one of the embodiments, the outer wall of the shielding cover 150 is provided with an arc-shaped chamfer at one end where the shielding cover 150 is sleeved on the outer periphery of the transition conductor 140, by providing a smooth conductive surface, the shielding cover 150 can force the power line to be uniformly distributed along the surface thereof, significantly reducing the local maximum electric field strength generated at the sharp edge or small radius of curvature, so as to achieve uniform electric field distribution and reduce the electric field strength.

[0041] As shown in the drawings, Figure 3 In one of the embodiments, the connecting device 100 further comprises an insulating pad 160, which is made of insulating material, and in the embodiment, the insulating pad 160 is formed by processing a plastic plate with a thickness of 3-5 mm, but is not limited thereto, and in other embodiments, the insulating pad 160 can also be made of other materials and have other thicknesses.

[0042] When the shielding cover 150 is installed, it is sent into the housing 500 from the hand hole 510 of the housing 500, and then it is sleeved on the outside of the transition conductor 140, and then it is pulled along the axial direction of the shielding cover 150 from the transition conductor 140, so that the shielding cover 150 slides relative to the transition conductor 140, and then the end of the shielding cover 150 away from the transition conductor 140 is fastened to the first conductor 110, and the installation of the shielding cover 150 is completed. During the sliding process of the shielding cover 150 relative to the transition conductor 140, if the shielding cover 150 contacts the first conductor 110, the second conductor 120, the connecting conductor 130 and the transition conductor 140 inside the shielding cover 150, relative friction and metal powder may be generated, which can cause insulation discharge.

[0043] As shown in the drawings, Figure 3As shown, the insulating pad 160 is located inside the shielding cover 150, and the first conductor 110, the second conductor 120, the connecting conductor 130 and the transition conductor 140 are not protruded from the surface of the insulating pad 160, so as to limit the position of the shielding cover 150 in the radial direction of the shielding cover 150 by the insulating pad 160, and avoid the shielding cover 150 from contacting the first conductor 110, the connecting conductor 130, the second conductor 120 and the transition conductor 140, thereby avoiding the problem that the shielding cover 150 may contact and rub the first conductor 110, the connecting conductor 130, the second conductor 120 and the transition conductor 140 during installation.

[0044] As shown in the drawings, Figure 3 In one embodiment, the insulating pad 160 has a ring structure, and the insulating pad 160 is connected to the transition conductor 140. In this embodiment, the insulating pad 160 is fixedly connected to the end surface of the transition conductor 140 facing the second conductor 120 by a fastener such as a fastening bolt, but this is not limiting. The insulating pad 160 and the transition conductor 140 can also be connected by other connection methods such as buckling, or can be connected to other end surfaces such as the peripheral surface of the transition conductor 140.

[0045] As shown in the drawings, Figure 3 The outer diameter of the insulating pad 160 is greater than the maximum diameter of the portion of the connecting conductor 130 inside the shielding cover 150, and the inner diameter of the insulating pad 160 is not less than the outer diameter of the second conductor 120 to be fitted outside the second conductor 120, so as to limit the position of the shielding cover 150 in the radial direction of the shielding cover 150 by the insulating pad 160, and avoid the shielding cover 150 from contacting the first conductor 110, the connecting conductor 130, the second conductor 120 and the transition conductor 140 inside. In this embodiment, the second conductor 120 has a variable diameter structure, and the inner diameter of the insulating pad 160 is not less than the outer diameter of the end of the second conductor 120 close to the transition conductor 140, and the outer diameter of the insulating pad 160 is not less than the maximum outer diameter of the second conductor 120.

[0046] For example, the outer diameter of the insulating pad 160 is greater than the outer diameter of the transition conductor 140 by 2mm to 4mm, so as to achieve better anti-friction effect. For example, the edge of the outer peripheral surface of the insulating pad 160 has a rounded structure, so as to make the shielding cover 150 more smooth when sliding up and down.

[0047] As shown in the drawings, Figure 3 In one embodiment, the first conductor 110 includes a top end portion 111 and a first connecting portion 112 connected to each other. The diameter of the top end portion 111 is greater than the diameter of the first connecting portion 112, and the top end portion 111 is located on the side of the first connecting portion 112 away from the second conductor 120. A first connecting hole 113 is formed in the end surface of the top end portion 111 away from the first connecting portion 112, for connecting the high-voltage GIS 200.

[0048] As shown in Figure 3 , the shield 150 is connected to the peripheral surface of the top end portion 111, in this embodiment, the peripheral surface of the top end portion 111 is provided with an upper mounting hole arranged along the radial direction of the top end portion 111, the shield 150 and the top end portion 111 are connected by fasteners such as fastening screws to the upper mounting hole, but not as a limitation.

[0049] As shown in Figure 3 , the connecting conductor 130 is connected to the peripheral surface of the first connecting portion 112. In this embodiment, the peripheral surface of the first connecting portion 112 is provided with a lower mounting hole arranged along the radial direction of the first connecting portion 112, the connecting conductor 130 and the first connecting portion 112 are connected by fasteners such as fastening screws to the lower mounting hole, but not as a limitation.

[0050] As shown in Figure 3 , in one of the embodiments, the second conductor 120 is located in the axial extension direction of the first conductor 110, and the connecting groove 131 extends in the axial direction of the first conductor 110, the second conductor 120 can slide along the connecting groove 131 relative to the connecting conductor 130 in the axial direction of the first conductor 110. Figure 3 When the second conductor 120 is located below the first conductor 110 as shown in Figure 3 , the connecting groove 131 extends in the up-down direction, but not as a limitation, if the first conductor 110 and the second conductor 120 are distributed in the horizontal direction in the figure, the connecting groove 131 can extend in the horizontal direction.

[0051] As shown in Figure 2 , in one of the embodiments, the second conductor 120 includes a bottom end portion 121 and a second connecting portion 122 connected together, the bottom end portion 121 is connected to the transition conductor 140, in this embodiment, the end surface of the bottom end portion 121 towards the transition conductor 140 is in contact with the transition conductor 140, so as to realize the conductive connection between them.

[0052] As shown in Figure 3 , the diameter of the second connecting portion 122 is smaller than the diameter of the bottom end portion 121, so as to make the installation of the second conductor 120 more stable and avoid tilting.

[0053] As shown in ​ , the connecting groove 131 is provided on the peripheral surface of the connecting conductor 130, so as to facilitate the processing of the connecting groove 131, and also avoid the interference of the connecting conductor 130 with the sliding of the second conductor 120 along the connecting groove 131.

[0054] As shown in ​As shown, in one of the embodiments, the connecting device 100 further comprises a compression ring 170, the compression ring 170 is sleeved on the outer periphery of the second connecting portion 122 and the inner diameter of the compression ring 170 is not greater than the diameter of the bottom end portion 121, and the compression ring 170 is fixedly connected to the transition conductor 140, the compression ring 170 is used to press the bottom end portion 121 against the end face of the transition conductor 140, so that the connection of the second conductor 120 and the transition conductor 140 is more stable.

[0055] In the embodiment, the outer diameter of the insulating pad 160 is greater than the outer diameter of the compression ring 170 by 2mm to 4mm, so as to avoid the compression ring 170 and the shielding cover 150 from contacting and rubbing. In the embodiment, the insulating pad 160 and the compression ring 170 are both connected to the end face of the transition conductor 140 connecting the second conductor 120, the fasteners for connecting the insulating pad 160 and the fasteners for connecting the compression ring 170 are arranged staggered in the circumferential direction of the transition conductor 140, so as to avoid mutual interference.

[0056] The connecting device 100 provided in the above scheme, by setting the connecting conductor 130 connecting the first conductor 110 and the second conductor 120 as a flexible material, and the part of the connecting conductor 130 connecting the second conductor 120 can slide along the connecting groove 131 relative to the second conductor 120, so that when the thermal stress between the first conductor 110 and the second conductor 120 due to thermal expansion and contraction of itself or other expansion elements, the stress caused by thermal expansion and contraction can be absorbed by the deformation of the connecting conductor 130 itself and the sliding of the connecting conductor 130 relative to the second conductor 120. On the other hand, the stress generated by the vibration of the transformer during the use of the transformer can also be absorbed by the deformation of the connecting conductor 130 itself and the sliding of the connecting conductor 130 relative to the second conductor 120. In addition, the assembly deviation between the first conductor 110 and the second conductor 120 caused by the possible position deviation of the high-voltage GIS 200 and the transformer during assembly can also be absorbed by the deformation of the connecting conductor 130 itself, thereby facilitating assembly.

[0057] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0058] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A connection device, characterized in that The connecting device comprises: a first conductor; a second conductor located on one side of the first conductor; and a connecting conductor made of flexible material, the connecting conductor being provided with a connecting slot, the connecting slot extending in the distribution direction of the first conductor and the second conductor, one end of the connecting conductor being electrically connected to the first conductor, and the second conductor being electrically connected to the other end of the connecting conductor in a slidable manner in the connecting slot.

2. The connection device according to claim 1, characterized in that The connecting device further comprises a transition conductor, the transition conductor being located on the side of the second conductor away from the first conductor, and the transition conductor being electrically connected to the second conductor.

3. The connection device according to claim 2, characterized in that The connecting device further comprises a shielding cover, the shielding cover being in a cylindrical shape, one end of the shielding cover being connected to the first conductor, and the other end of the shielding cover being sleeved on the outer periphery of the transition conductor, the second conductor and the connecting conductor being located inside the shielding cover.

4. The connection device according to claim 3, characterized in that The outer wall of the shielding cover is provided with an arc-shaped chamfer at the end of the shielding cover sleeved on the outer periphery of the transition conductor.

5. The connection device of claim 3, wherein The connecting device further comprises an insulating pad, the insulating pad being made of insulating material, and the insulating pad being located inside the shielding cover, the first conductor, the second conductor, the connecting conductor and the part of the transition conductor located inside the shielding cover all not protruding from the circumferential surface of the insulating pad.

6. The connection device according to claim 5, characterized in that The insulating pad is in a ring shape, the insulating pad being connected to the transition conductor, the outer diameter of the insulating pad being greater than the maximum diameter of the part of the connecting conductor located inside the shielding cover, and the inner diameter of the insulating pad being not less than the outer diameter of the second conductor to be sleeved on the outside of the second conductor.

7. The connection device of claim 3, wherein The first conductor comprises a top end portion and a first connecting portion connected to each other, the diameter of the top end portion being greater than the diameter of the first connecting portion, and the top end portion being located on the side of the first connecting portion away from the second conductor, the shielding cover being connected to the circumferential surface of the top end portion, and the connecting conductor being connected to the circumferential surface of the first connecting portion.

8. The connection device according to claim 1 or 7, characterized in that The second conductor is located in the extension direction of the axial direction of the first conductor, and the connecting slot extends in the axial direction of the first conductor, the second conductor being capable of sliding in the axial direction of the first conductor relative to the connecting conductor along the connecting slot.

9. The connection device of claim 2, wherein, The second conductor comprises a bottom end portion and a second connecting portion connected to each other, the bottom end portion being connected to the transition conductor, and the diameter of the second connecting portion being less than the diameter of the bottom end portion.

10. The connection device according to claim 9, characterized in that The connecting device further comprises a compression ring, the compression ring being sleeved on the outer periphery of the second connecting portion and the inner diameter of the compression ring being less than the diameter of the bottom end portion, and the compression ring being fixedly connected to the transition conductor.

Images