Double-pass bushing for load switch gas cabinet

Abstract

The present invention discloses a double-pass bushing for a load switch inflatable cabinet, comprising a first connection seat and a second connection seat, the first connection seat and the second connection seat are respectively arranged on both sides of a partition, the first connection seat comprises a first insulator and a first connection terminal, the first connection terminal is arranged in a first mounting hole, and the first connection hole and the first connection part are respectively arranged at both ends of the first connection terminal, the second connection seat comprises a second insulator and a second connection terminal, the second connection terminal is arranged in a second mounting hole, and the second connection hole and the second connection part are respectively arranged at both ends of the second connection terminal, and the first connection part and the second connection part are detachably connected. By arranging the split first connection seat and the second connection seat, the first connection part of the first connection seat and the second connection part of the second connection seat can be detachably connected, and when one of the connection seats fails, the connection seat can be replaced separately, which can reduce the workload of emergency repair and shorten the emergency repair time of fault power outage.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage equipment, and in particular to a double-pass bushing used for a load switch gas-filled cabinet. Background Art

[0002] Most of the existing load switch inflatable cabinets are multi-unit common box structures, with the unit rooms separated by partitions. When the equipment in two unit rooms needs to be connected, a double-channel pipe is needed to electrically connect the wires in the two unit rooms. The double-pass bushing is set on the partition between the unit rooms. Once the double-pass bushing of a unit fails and needs to be replaced, the unit cabinets of the entire ring network cabinet need to be disassembled and reassembled. The secondary equipment re-adjustment takes one to two days. During this period, a crane is used to lift the outer shell of the distribution network cabinet, install and disassemble the fence, etc., which is equivalent to doing a new project workload during the emergency repair, which is very unfavorable for the emergency repair, increases the difficulty of emergency repair, and leads to a long time for power outage emergency repair. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a double-pass bushing for a load switch inflatable cabinet, which can be easily replaced with low difficulty and shortens the repair time.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A double-pass sleeve for a load switch inflatable cabinet is provided, which is arranged on a partition of the load switch inflatable cabinet and includes a first connecting seat and a second connecting seat, the first connecting seat and the second connecting seat are respectively arranged on both sides of the partition, the first connecting seat includes a first insulator and a first connecting terminal, the first insulator is provided with a penetrating first mounting hole, the first connecting terminal is arranged in the first mounting hole, the first connecting terminal is respectively provided with a first connecting hole and a first connecting portion at both ends, the first connecting hole is used to connect to a terminal of an electric wire, the second connecting seat includes a second insulator and a second connecting terminal, the second insulator is provided with a penetrating second mounting hole, the second connecting terminal is arranged in the second mounting hole, the second connecting terminal is respectively provided with a second connecting hole and a second connecting portion at both ends, the second connecting hole is used to connect to a terminal of the electric wire, and the first connecting portion and the second connecting portion are detachably connected.

[0006] As a preferred solution of a double-pass bushing for a load switch inflatable cabinet, the first connection part is a first connection column arranged on the first connection terminal, the second connection part is a fourth connection hole arranged on the second connection terminal, and the first connection column is inserted into the fourth connection hole.

[0007] As a preferred solution for a double-pass sleeve of a load switch inflatable cabinet, a first strap contact finger is arranged in the fourth connecting hole, and the periphery of the first connecting column and the hole wall of the fourth connecting hole clamp the first strap contact finger.

[0008] As a preferred solution for the double-pass sleeve of the load switch inflatable cabinet, the hole wall of the fourth connecting hole is provided with a mounting groove, and the first strap contact finger is arranged in the mounting groove.

[0009] As a preferred solution for a double-pass sleeve of a load switch inflatable cabinet, the first connecting part is a second threaded hole arranged on the first connecting terminal, the second connecting part is a connecting screw arranged on the second connecting terminal, the connecting screw and the second connecting terminal are detachably connected, and a third connecting hole is arranged at one end of the second connecting terminal away from the second connecting hole, the third connecting hole is connected to the second connecting hole, and the aperture of the third connecting hole is smaller than the aperture of the second connecting hole, a step surface is formed between the third connecting hole and the second connecting hole, the connecting screw passes through the third connecting hole and is screwed into the second threaded hole, and the nut of the connecting screw is tightly pressed against the step surface.

[0010] As a preferred solution for the double-pass sleeve of the load switch inflatable cabinet, it also includes a metal washer, the connecting screw passes through the metal washer and the third connecting hole in sequence, and the nut of the connecting screw and the step surface clamp the metal washer.

[0011] As a preferred solution for a double-pass bushing for a load switch inflatable cabinet, it also includes a conductive bushing, wherein the first connecting part is a second connecting column arranged on the first connecting terminal, and the second connecting part is a third connecting column arranged on the second connecting terminal, and the two ends of the conductive bushing are respectively sleeved on the outer periphery of the second connecting column and the third connecting column, and the inner walls of the conductive bushing are respectively pressed against the peripheral side surfaces of the second connecting column and the third connecting column.

[0012] As a preferred solution for the double-pass bushing for the load switch inflatable cabinet, it also includes an insulating filling tube, which is arranged between the first insulator and the second insulator, and the insulating filling tube is used to fill the gap between the first insulator and the second insulator.

[0013] As a preferred solution for a double-pass bushing for a load switch inflatable cabinet, the first connecting seat is arranged in a vacuum chamber, and a sealing ring is clamped between the first insulator and the partition.

[0014] As a preferred solution of a double-pass bushing for a load switch inflatable cabinet, the first insulator is detachably connected to the partition through a first fastener; and / or,

[0015] The second insulator is detachably connected to the partition through a second fastener.

[0016] The beneficial effects of the present invention are as follows: by setting up a split first connecting seat and a second connecting seat, the first connecting portion of the first connecting seat and the second connecting portion of the second connecting seat can be detachably connected. When one of the connecting seats fails, the connecting seat can be replaced separately, which can reduce the workload of emergency repairs and shorten the emergency repair time for power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0018] Figure 1 It is a cross-sectional schematic diagram of a double-pass bushing used in a load switch inflation cabinet according to the first embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional schematic diagram of the second connecting socket according to the first embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the second connecting socket according to the first embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of the first connecting socket according to the first embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the first connecting socket according to Embodiment 1 of the present invention.

[0023] Figure 6 It is a cross-sectional schematic diagram of a double-pass bushing for a load switch inflatable cabinet according to the second embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of an exploded sectional view of a double-pass bushing for a load switch inflatable cabinet according to the second embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the decomposition of a double-pass bushing for a load switch inflatable cabinet according to the second embodiment of the present invention.

[0026] Fig. 9 It is a cross-sectional schematic diagram of a double-pass bushing for a load switch inflation cabinet according to the third embodiment of the present invention.

[0027] Fig.10 This is a schematic diagram of the decomposition of a double-pass bushing for a load switch inflatable cabinet according to the third embodiment of the present invention.

[0028] Fig.11 It is a cross-sectional schematic diagram of a double-pass bushing for a load switch inflation cabinet according to the fourth embodiment of the present invention.

[0029] Fig.12 This is a schematic diagram of an exploded sectional view of a double-pass bushing for a load switch inflation cabinet according to a fourth embodiment of the present invention.

[0030] Fig.13 It is a cross-sectional schematic diagram of a double-pass bushing for a load switch inflatable cabinet according to the fifth embodiment of the present invention.

[0031] Fig.14 This is a schematic diagram of an exploded sectional view of a double-pass bushing for a load switch inflatable cabinet according to a fifth embodiment of the present invention.

[0032] Fig.15 This is a schematic diagram of the decomposition of a double-pass bushing for a load switch inflatable cabinet according to the fifth embodiment of the present invention.

[0033] In the figure:

[0034] 100, partition; 200, first chamber; 300, second chamber;

[0035] 1. first connection seat; 11. first insulator; 111. first limiting surface; 112. first groove; 12. first connection terminal; 121. first connection hole; 122. first threaded hole; 123. second threaded hole; 124. first connection column; 125. second connection column; 126. second groove; 2. second connection seat; 21. second insulator; 211. second limiting surface; 212. first protrusion; 213. second mounting hole; 22. Second connecting terminal; 221. Second connecting hole; 222. Connecting stud; 223. Connecting screw; 224. Metal washer; 225. Third connecting column; 226. Fourth connecting hole; 227. Second protrusion; 228. Third connecting hole; 31. First strap contact finger; 32. Second strap contact finger; 4. Conductive sleeve; 5. Insulating filling tube; 61. First fastener; 62. Second fastener; 63. Press plate; 7. Sealing ring. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 15 As shown, the present invention provides a double-pass bushing for a load switch inflatable cabinet (hereinafter referred to as the double-pass bushing), the switch inflatable cabinet includes a plurality of unit chambers, wherein two adjacent unit chambers are respectively a first chamber 200 and a second chamber 300, the first chamber 200 and the second chamber 300 are separated by a partition 100, the double-pass bushing is arranged on the partition 100 of the load switch inflatable cabinet, the double-pass bushing includes a first connecting seat 1 and a second connecting seat 2, the first connecting seat 1 and the second connecting seat 2 are respectively arranged on both sides of the partition 100, the first connecting seat 1 is arranged in the first chamber 200, the second connecting seat 2 is arranged in the second chamber 300, the first connecting seat 1 includes a first insulator 11 and a first connecting terminal 12, the first insulator 11 is provided with a first mounting hole penetrating therethrough The first connection terminal 12 is arranged in the first mounting hole, and the two ends of the first connection terminal 12 are respectively provided with a first connection hole 121 and a first connection part, the first connection hole 121 is a threaded hole, and the first connection hole 121 is used to connect with the terminal of the wire in the first chamber 200, the second connection seat 2 includes a second insulator 21 and a second connection terminal 22, the second insulator 21 is provided with a penetrating second mounting hole 213, the second connection terminal 22 is arranged in the second mounting hole 213, and the two ends of the second connection terminal 22 are respectively provided with a second connection hole 221 and a second connection part, the second connection hole 221 is a threaded hole, and the second connection hole 221 is used to connect with the terminal of the wire in the second chamber 300, and the first connection part and the second connection part are detachably connected. By providing a split first connection seat 1 and a second connection seat 2, the first connection part of the first connection seat 1 and the second connection part of the second connection seat 2 are detachably connected, and when one of the connection seats fails, the connection seat can be replaced separately, which can reduce the workload of emergency repair and shorten the emergency repair time of fault power outage.

[0039] Reference Figure 1 , Fig.11 and Fig.13 In one embodiment, when the first connection portion and the second connection portion are connected, the first limiting surface 111 on the first insulator 11 and the second limiting surface 211 on the second insulator 21 are respectively in contact with the two side surfaces of the partition 100, referring to Fig. 9 In another embodiment, the second insulator 21 may not be in close contact with the side surface of the partition 100 .

[0040] Reference Figures 1 to 5 The first connection part is a first threaded hole 122 provided on the first connection terminal 12, and the second connection part is a connection stud 222 provided on the second connection terminal 22, and the connection stud 222 is screwed into the first threaded hole 122. By setting the first connection part as the first threaded hole 122 provided on the first connection terminal 12, and the second connection part as the connection stud 222 provided on the second connection terminal 22, that is, the first connection part and the second connection part are threadedly connected, the stability of the connection between the first connection part and the second connection part can be improved, and the stability of the circuit connection between the first chamber 200 and the second chamber 300 can be ensured.

[0041] Further, the first limiting surface 111 of the first insulator 11 is recessed with a first groove 112, the first mounting hole passes through the bottom of the first groove 112, the second limiting surface 211 of the second insulator 21 is protruding with a first protrusion 212, the second mounting hole 213 passes through the first protrusion 212, and the first protrusion 212 is inserted into the first groove 112. By providing the first groove 112, the creepage distance along the surface of the first connection terminal 12 can be increased; the cooperation of the first groove 112 and the first protrusion 212 can make the first insulator 11 and the second insulator 21 plug-in and match, thereby avoiding the conductive first connection part and the second connection part from being exposed, and the first connection part and the second connection part can avoid the phenomenon of creepage when power is turned on. Of course, the positions of the first protrusion 212 and the first groove 112 can be interchanged, that is, the first protrusion 212 can be provided on the first insulator 11, and the first groove 112 can be provided on the second insulator 21.

[0042] Preferably, refer to Figures 9 to 15 The double-pass bushing further includes an insulating filling tube 5, which is disposed between the first insulator 11 and the second insulator 21 and is used to fill the gap between the first insulator 11 and the second insulator 21. By providing the insulating filling tube 5, the gap between the first insulator 11 and the second insulator 21 can be filled, so that the first connection portion and the second connection portion can be further prevented from having creepage when power is supplied.

[0043] Reference Figure 1 and Fig. 9The diameter of the connecting stud 222 is smaller than the hole diameter of the second mounting hole 213, and the connecting stud 222 is spaced apart from the hole wall of the second mounting hole 213. When the first connecting portion and the second connecting portion are connected, the end of the first connecting terminal 12 is inserted into the second mounting hole 213. By setting the connecting stud 222 and the hole wall of the second mounting hole 213 to be spaced apart, and the end of the first connecting terminal 12 is inserted into the second mounting hole 213, the first connecting seat 1 and the second connecting seat 2 can be mutually engaged, so that the size of the double-pass sleeve after installation can be reduced, and the tightness and stability of the connection between the first connecting seat 1 and the second connecting seat 2 can also be improved.

[0044] Reference Fig. 9 and Fig.10 In one embodiment, the first connecting portion is a second threaded hole 123 provided on the first connecting terminal 12, and the second connecting portion is a connecting screw 223 provided on the second connecting terminal 22. The connecting screw 223 and the second connecting terminal 22 are detachably connected. A third connecting hole 228 is provided at one end of the second connecting terminal 22 away from the second connecting hole 221. The third connecting hole 228 is connected to the second connecting hole 221, and the aperture of the third connecting hole 228 is smaller than the aperture of the second connecting hole 221. A step surface is formed between the third connecting hole 228 and the second connecting hole 221. The connecting screw 223 passes through the third connecting hole 228 and is screwed into the second threaded hole 123. A metal washer 224 is clamped between the nut of the connecting screw 223 and the step surface. By setting the connecting screw 223 and the second connecting terminal 22 to be detachably connected, during assembly, the connecting screw 223 can be directly screwed without twisting the second connecting seat 2 as a whole, which can reduce the difficulty of assembling the double-way sleeve; by clamping a metal washer 224 between the nut of the connecting screw 223 and the step surface, the metal washer 224 can improve the connection stability of the connecting screw 223, reduce the possibility of loosening of the connecting screw 223, and ensure the connection stability of the first connecting seat 1 and the second connecting seat 2.

[0045] Preferably, a second groove 126 is provided on the first connecting terminal 12, the second threaded hole 123 is provided at the bottom of the second groove 126, a second protrusion 227 is provided on the second connecting terminal 22, the third connecting hole 228 passes through the second protrusion 227, the second protrusion 227 is inserted into the second groove 126, a second strap contact finger 32 is provided in the second groove 126, the second protrusion 227 is inserted into the second groove 126, and the periphery of the second protrusion 227 and the groove wall of the second groove 126 clamp the second strap contact finger 32. By setting the second protrusion 227 and the second groove 126, the contact area between the first connecting terminal 12 and the second connecting terminal 22 can be increased, thereby reducing the resistance value of the double-pass sleeve and reducing the influence of the double-pass sleeve on the circuit structure; by setting the second watchband contact finger 32, the second watchband contact finger 32 can fill the gap between the second protrusion 227 and the second groove 126, further increasing the contact area between the first connecting terminal 12 and the second connecting terminal 22, and the elastic force generated by the second watchband contact finger 32 after being compressed can enable the second watchband contact finger 32 to press against the peripheral side surface of the second protrusion 227 and the groove wall of the second groove 126, thereby improving the connection stability between the two.

[0046] Reference Figure 6 , Figure 7 and Figure 8 In another embodiment, the first connection part is a first connection column 124 provided on the first connection terminal 12, and the second connection part is a fourth connection hole 226 provided on the second connection terminal 22. The first watchband contact finger 31 is provided in the fourth connection hole 226, and the first connection column 124 is inserted into the fourth connection hole 226, and the periphery of the first connection column 124 is tightly pressed against the first watchband contact finger 31. By providing the first connection column 124 and the fourth connection hole 226, the first connection terminal 12 and the second connection terminal 22 are connected by plugging, so that the second connection base 2 does not need to be screwed, thereby reducing the difficulty of assembly.

[0047] Reference Figure 7 The hole wall of the fourth connecting hole 226 is provided with an installation groove, and the installation groove is used to accommodate the first strap contact finger 31 to prevent the first strap contact finger 31 from shifting when the first connecting column 124 is inserted into the fourth connecting hole 226.

[0048] Reference Figures 11 to 15In another embodiment, the double-pass sleeve further includes a conductive sleeve 4, the first connection portion is a second connection column 125 provided on the first connection terminal 12, the second connection portion is a third connection column 225 provided on the second connection terminal 22, the two ends of the conductive sleeve 4 are respectively sleeved on the outer periphery of the second connection column 125 and the third connection column 225, and the inner wall of the conductive sleeve 4 is respectively pressed against the peripheral side surface of the second connection column 125 and the third connection column 225. By providing the conductive sleeve 4, the conductive sleeve 4 is respectively plugged and matched with the second connection column 125 and the third connection column 225, so that the connection difficulty of the first connection terminal 12 and the second connection terminal 22 can be reduced.

[0049] In the actual application environment, the first chamber 200 is a vacuum chamber, and the second chamber 300 is a cable chamber, that is, the first connecting seat 1 is arranged in the vacuum chamber, the second connecting seat 2 is arranged in the cable chamber, and a sealing ring 7 is clamped between the first insulator 11 and the partition 100. By setting the sealing ring 7, the gap between the first insulator 11 and the partition 100 can be blocked and filled to prevent external gas from entering the first chamber 200 from the gap, thereby ensuring the vacuum negative pressure environment inside the first chamber 200. In actual applications, damage mostly occurs in the part of the double-pass sleeve located in the second chamber 300, and the part of the double-pass sleeve located in the first chamber 200 is rarely damaged. Therefore, a split first connecting seat 1 and second connecting seat 2 are set. When the second connecting seat 2 is damaged, the second connecting seat 2 can be directly replaced.

[0050] Reference Figures 9 to 15 , the first insulator 11 is detachably connected to the partition 100 by the first fastener 61. By setting the first insulator 11 and the partition 100 to be detachably connected using the first fastener 61, the connection stability between the first connection seat 1 and the partition 100 can be enhanced; of course, referring to Figures 11 to 15 The second insulator 21 can also be detachably connected to the partition 100 through the second fastener 62, which can enhance the connection stability between the double-pass sleeve and the partition 100 as a whole.

[0051] Figures 1 to 15 In the embodiment, the first insulator 11 and the second insulator 21 are manufactured with materials matching the insulating gas. For example, the first insulator 11 and the second insulator 21 can be cast with epoxy resin insulating material. The first connecting terminal 12, the second connecting terminal 22, the connecting stud 222, and the connecting screw 223 are all made of metal. For example, they can be made of copper. The first strap contact finger 31, the second strap contact finger 32 and the conductive sleeve 4 can be made of high-performance beryllium bronze material. The insulating filling tube 5 can be made of silicone material, so that the insulating filling tube 5 has high flexibility and can be deformed after being compressed. The elastic force generated by the deformation can form a pre-tightening force to improve the connection stability.

[0052] Reference Figure 6 In one embodiment, the insulating filling tube 5 is located in the first connecting seat 1, the outer periphery of the insulating filling tube 5 is a conical surface, the insulating filling tube 5 is conical, and the diameter of the insulating filling tube 5 close to the second connecting seat 2 is greater than the diameter of the insulating filling tube 5 away from the second connecting seat 2. Fig. 9 , the insulating filling tube 5 is also a conical surface, refer to Fig.11 and Fig.13 A part of the insulating filling tube 5 is located in the first connecting seat 1, and the other part of the insulating filling tube 5 is located in the second connecting seat 2. The insulating filling tube 5 passes through the partition 100, and the outer periphery of the insulating filling tube 5 is also a conical surface. The diameter of the middle part of the insulating filling tube 5 is larger than the diameter of the two ends. By setting the outer periphery of the insulating filling tube 5 as a conical surface, the tighter the connection between the first connecting seat 1 and the second connecting seat 2, the smaller the gap between the insulating filling tube 5 and the first connecting seat 1 and the second connecting seat 2. In this way, the sealing effect of the gap between the first connecting seat 1 and the second connecting seat 2 can be improved, and the occurrence of creepage can be reduced.

[0053] Reference Figures 11 to 15 In this embodiment, a portion of the insulating filling tube 5 is located in the first connecting seat 1, and another portion of the insulating filling tube 5 is located in the second connecting seat 2. The groove structure for accommodating the insulating filling tube 5 in the first insulator 11 and the second insulator 21 can be designed according to the shape of the insulating filling tube 5, thereby ensuring that the insulating filling tube 5 is in surface contact with the first insulator 11 and the second insulating paper.

[0054] This embodiment provides five types of double-pass sleeve structures in total.

[0055] Reference Figures 1 to 5, in the double-pass sleeve of this structure, the first connection part of the first connection terminal 12 is the first threaded hole 122, the second connection part of the second connection terminal 22 is the connection stud 222, the first connection hole 121 on the first connection terminal 12 is connected to the first threaded hole 122, the first connection hole 121 is a threaded hole, the first connection seat 1 and the second connection seat 2 are not directly fixed to the partition 100, after both are installed, the first limiting surface 111 of the first connection seat 1 and the second limiting surface 211 of the second connection seat 2 respectively clamp the partition 100. During assembly, the first connection seat 1 and the partition 100 can be positioned first, and then the first connection seat 1 and the connection stud 222 can be aligned with the first threaded hole 122 of the first connection seat 1 and screwed until the first limiting surface 111 and the second limiting surface 211 clamp the partition 100. In the double-pass sleeve of this structure, the outer surface of the second insulator 21 of the second connecting part is provided with multiple operating side surfaces, and the multiple operating side surfaces are arranged in a ring around the axis of the second connecting terminal 22 and are connected in sequence, so that the outer edge of the cross section of the second insulator 21 is polygonal. For example, six operating side surfaces are provided, so that the outer edge of the cross section of the second insulator 21 is hexagonal, so that the second connecting seat 2 can be conveniently fixed to the first connecting seat 1 using tools (such as a wrench).

[0056] Reference Figures 6 to 8In the double-pass sleeve of this structure, the first connecting part on the first connecting terminal 12 is the first connecting column 124, and the second connecting part on the second connecting terminal 22 is the fourth connecting hole 226. The first connecting seat 1 and the second connecting seat 2 are plugged together. The first insulator 11 of the first connecting seat 1 is fixed to the partition 100 by the first fastener 61, and the first fastener 61 can be a fastening screw. The second insulator 21 of the second connecting seat 2 is fixed to the partition 100 by the second fastener 62, and the second fastener 62 can be a fastening stud and a fastening nut, wherein the fastening stud can be pre-fixed on the partition 100, and the fastening stud passes through the second insulator 21 and is threadedly connected with the fastening nut. During assembly, the insulating sleeve can be first inserted into the first connection seat 1, and then the first connection seat 1 is fixed to the partition 100, and then the second connection seat 2 is assembled, and the first strap contact finger 31 is assembled into the fourth connection hole 226 of the second connection seat 2, and the fourth connection hole 226 of the second connection seat 2 is inserted into the first connection column 124 of the first connection seat 1, that is, the first connection column 124 is inserted into the fourth connection hole 226, and then the second connection seat 2 is fixed to the partition 100 using the second fastener 62. For the double-pass sleeve of this structure, multiple first fasteners 61 and second fasteners 62 can be provided, and multiple first fasteners 61 and second fasteners 62 are respectively uniformly distributed around the axis of the first connection terminal 12 and the second connection terminal 22. For example, four, six, or more first fasteners 61 and second fasteners 62 are provided, and the number of first fasteners 61 and second fasteners 62 can be the same or different. Of course, the first fasteners 61 and second fasteners 62 need to be staggered.

[0057] Reference Fig. 9 and Fig.10 In the double-pass bushing of this structure, the first connection part on the first connection terminal 12 is the second threaded hole 123, the second connection part on the second connection terminal 22 is the connection screw 223, and the connection screw 223 and the second connection terminal 22 are separate, and the second connection terminal 22 is provided with a third connection hole 228, and the third connection hole 228 is connected with the second connection hole 221 of the second connection terminal 22. During assembly, the first fastener 61 is first used to fix the first connection seat 1 and the partition 100, and after the insulating bushing is put on, the second connection seat 2 and the first connection seat 1 are positioned, and the metal washer 224 is put on the connection screw 223, and then the connection screw 223 is inserted from the second connection hole 221, so that the connection screw 223 can pass through the fourth connection hole 226 and be screwed into the second threaded hole 123. In the double-pass bushing of this structure, multiple first fasteners 61 can be provided, and the multiple first fasteners 61 are evenly distributed in an annular manner around the axis of the first connection terminal 12, for example, four, six, or more first fasteners 61 are provided.

[0058] Reference Fig.11 and Fig.12In the double-pass sleeve of this structure, the first connecting part on the first connecting terminal 12 is the second connecting column 125, the second connecting part of the second connecting terminal 22 is the third connecting column 225, and the first fastener 61 is a connecting screw 223. During assembly, the first fastener 61 is first used to fix the first connecting seat 1 to the partition 100. After the insulating sleeve and the conductive sleeve 4 are put on, the second connecting seat 2 and the first connecting seat 1 are positioned, and then the second connecting seat 2 is pressed hard so that the third connecting column 225 of the second connecting seat 2 is inserted into the conductive sleeve 4. Finally, the second fastener 62 is used to fix the second connecting seat 2 to the partition 100. Preferably, the second connecting seat 2 can be pressed and fixed using a pressing plate 63. Exemplarily, the fastening studs on the partition 100 can pass through the second insulator 21 and the pressing plate 63 in sequence, and then be fixed with the fastening nut. For the double-pass sleeve of this structure, a plurality of first fasteners 61 and a plurality of second fasteners 62 can be provided, and the plurality of first fasteners 61 and second fasteners 62 are respectively evenly distributed in a ring around the axis of the first connecting terminal 12 and the second connecting terminal 22. For example, four, six, or more first fasteners 61 and second fasteners 62 are provided, and the numbers of the first fasteners 61 and the second fasteners 62 can be the same or different. Of course, the first fasteners 61 and the second fasteners 62 need to be staggered.

[0059] Reference Figures 13 to 15In the double-pass sleeve of this structure, the first connection portion on the first connection terminal 12 is the second connection column 125, and the second connection portion of the second connection terminal 22 is the third connection column 225. In this embodiment, the first fastener 61 and the second fastener 62 both include a fastening stud and a fastening nut, and the fastening screws are pre-fixed on both sides of the partition 100. When assembling, the first fastener 61 is first used to fix the first connection seat 1 and the partition 100. For example, the fastening screw of the first fastener 61 passes through the first insulator 11, and then connects with the first fastener 61. After the nut is threadedly connected, the insulating sleeve and the conductive sleeve 4 are put on, the second connection seat 2 and the first connection seat 1 are positioned, and then the second connection seat 2 is pressed hard so that the third connection column 225 of the second connection seat 2 is inserted into the conductive sleeve 4, and finally the second connection seat 2 is fixed to the partition 100 using the second fastener 62. Preferably, the second connection seat 2 can be pressed and fixed using the pressing plate 63. For example, the fastening studs on the partition 100 can pass through the second insulator 21 and the pressing plate 63 in sequence, and then fixed with the fastening nut. For the double-pass sleeve of this structure, multiple first fasteners 61 and second fasteners 62 can be set, and multiple first fasteners 61 and second fasteners 62 are respectively evenly distributed in an annular shape around the axis of the first connection terminal 12 and the second connection terminal 22. For example, four, six, or more first fasteners 61 and second fasteners 62 are set, and the number of first fasteners 61 and second fasteners 62 can be the same or different. Of course, the first fasteners 61 and second fasteners 62 need to be staggered.

[0060] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0062] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0063] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A double-pass bushing for a load switch inflatable cabinet, arranged on a partition of the load switch inflatable cabinet, characterized in that: It includes a first connecting seat and a second connecting seat, the first connecting seat and the second connecting seat are respectively arranged on both sides of the partition, the first connecting seat includes a first insulator and a first connecting terminal, the first insulator is provided with a penetrating first mounting hole, the first connecting terminal is arranged in the first mounting hole, the first connecting terminal is respectively provided with a first connecting hole and a first connecting part at both ends, the first connecting hole is used to connect with the terminal of the wire, the second connecting seat includes a second insulator and a second connecting terminal, the second insulator is provided with a penetrating second mounting hole, the second connecting terminal is arranged in the second mounting hole, the second connecting hole and a second connecting part are respectively provided at both ends of the second connecting terminal, the second connecting hole is used to connect with the terminal of the wire, the first connecting part and the second connecting part are detachably connected, and when one of the first connecting part and the second connecting part fails, it can be replaced separately.

2. The double-pass bushing for load switch inflatable cabinet according to claim 1, characterized in that: The first connection portion is a first connection column disposed on the first connection terminal, and the second connection portion is a fourth connection hole disposed on the second connection terminal, and the first connection column is inserted into the fourth connection hole.

3. The double-pass bushing for the load switch inflatable cabinet according to claim 2 is characterized in that: A first watchband contact finger is disposed in the fourth connecting hole, and the periphery of the first connecting column and the hole wall of the fourth connecting hole clamp the first watchband contact finger.

4. The double-pass bushing for the load switch inflatable cabinet according to claim 3, characterized in that: The hole wall of the fourth connecting hole is provided with a mounting groove, and the first strap contact finger is arranged in the mounting groove.

5. The double-pass bushing for load switch inflatable cabinet according to claim 1, characterized in that: The first connecting portion is a second threaded hole arranged on the first connecting terminal, and the second connecting portion is a connecting screw arranged on the second connecting terminal. The connecting screw and the second connecting terminal are detachably connected. A third connecting hole is arranged at one end of the second connecting terminal away from the second connecting hole. The third connecting hole is connected to the second connecting hole, and the aperture of the third connecting hole is smaller than the aperture of the second connecting hole. A step surface is formed between the third connecting hole and the second connecting hole. The connecting screw passes through the third connecting hole and is screwed into the second threaded hole, and the nut of the connecting screw is pressed against the step surface.

6. The double-pass bushing for the load switch inflatable cabinet according to claim 5, characterized in that: It also includes a metal washer, the connecting screw passes through the metal washer and the third connecting hole in sequence, and the nut of the connecting screw and the step surface clamp the metal washer.

7. The double-pass bushing for load switch inflatable cabinet according to claim 1, characterized in that: It also includes a conductive sleeve, wherein the first connecting portion is a second connecting column arranged on the first connecting terminal, and the second connecting portion is a third connecting column arranged on the second connecting terminal. Both ends of the conductive sleeve are respectively sleeved on the outer circumference of the second connecting column and the third connecting column, and the inner wall of the conductive sleeve is respectively pressed against the peripheral side surfaces of the second connecting column and the third connecting column.

8. The double-pass bushing for a load switch inflatable cabinet according to any one of claims 1 to 7, characterized in that: An insulation filling tube is also included. The insulation filling tube is disposed between the first insulator and the second insulator, and is used to fill a gap between the first insulator and the second insulator.

9. The double-pass bushing for a load switch inflatable cabinet according to any one of claims 1 to 7, characterized in that: The first connecting seat is arranged in the vacuum chamber, and a sealing ring is clamped between the first insulator and the partition.

10. The double-pass bushing for a load switch inflatable cabinet according to any one of claims 1 to 7, characterized in that: The first insulator is detachably connected to the partition via a first fastener; and / or, The second insulator is detachably connected to the partition through a second fastener.

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