Air-insulated sealed switchgear with side expansion device

Abstract

An air-insulated sealed switch cabinet with a side expansion device comprises a first cabinet and a second cabinet, wherein the first cabinet and the second cabinet are both provided with an opening window for expansion, an insulating partition is provided between two adjacent copper bars of the first cabinet and the second cabinet; the copper bar of the first cabinet or the second cabinet is provided with a cabinet expansion contact claw for overlapping the copper bar, and each positioning reinforcement strip of the first cabinet or the second cabinet is provided with an annular seal; the first cabinet and the second cabinet are both provided with a connecting plate, and each positioning reinforcement strip of the first and second cabinets after merging is respectively in contact with the annular seal and forms a seal. The present invention has low cost, good sealing, low requirements on the installation environment and the position of the parallel interface, adopts a large window type, combined with a high-insulation phase partition and an adaptive parallel cabinet expansion contact claw structure, which greatly improves the accuracy, flexibility and reliability of the switch cabinet side expansion parallel cabinet.

Description

Technical Field

[0001] The invention relates to an air-insulated sealed switch cabinet with a side expansion device. Background Art

[0002] The existing side expansion modes or devices of medium-voltage switchgear usually adopt side expansion bushing busbar type, side expansion epoxy resin cast busbar type, silicone inner cone busbar connection bushing type (connector), most of which are relatively high in price and have high requirements on the installation environment and parallel interface position; it is difficult to observe the busbar overlap quality at the expansion parallel connection during the installation of the expansion parallel cabinet.

[0003] Chinese patent document No. CN202127175U disclosed on January 25, 2012, a side expansion device for a high-voltage switch cabinet, including an insulating sleeve, a plum blossom contact, two grounding sleeves, two contact boxes, and two joints. The two contact boxes are respectively sleeved on the outer surfaces of the two ends of the insulating sleeve, the two grounding sleeves are respectively inserted into the openings at the two ends of the insulating sleeve, the plum blossom contact is inserted into the insulating sleeve, and the two ends of the plum blossom contact are respectively located in the two grounding sleeves, and the two joints are respectively inserted into the plum blossom contact from the openings at the two ends of the plum blossom contact. This structure has the above-mentioned shortcomings, so it needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide an air-insulated sealed switch cabinet with a side expansion device, which has precise guiding and merging, flexible and fast operation, good sealing, can improve the accuracy, flexibility and reliability of switch cabinet expansion and cabinet connection, and can meet the electrical performance standard requirements such as cabinet resistance, so as to overcome the shortcomings of the prior art.

[0005] An air-insulated sealed switch cabinet with a side expansion device designed for this purpose comprises a first cabinet and a second cabinet, wherein both the first cabinet and the second cabinet are provided with opening windows for expansion, and both opening windows are provided with more than one copper bar, and an insulating partition is provided between two adjacent copper bars of the first cabinet and the second cabinet; before merging, the copper bar of the first cabinet or the second cabinet is provided with a cabinet-merging expansion contact claw for overlapping the copper bar, and each positioning reinforcement strip of the first cabinet or the second cabinet is provided with an annular sealing member; the tops of the first cabinet and the second cabinet are provided with a connecting plate, and the first cabinet and the second cabinet are merged through the connecting plate, and the connecting plate between the first cabinet and the second cabinet is provided with a guide member, so that the opening windows of the first and second cabinets after merging correspond to each other, so as to The copper bars of the first and second cabinets after the merger are overlapped with the extended contact claws of the combined cabinets respectively; in addition, each positioning reinforcement strip of the first and second cabinets after the merger is respectively in contact with the annular seal to form a seal, and the four positioning reinforcement strips are glued to the four sides of the opening window with high viscosity glue, and fixed to the four sides of the opening window with countersunk screws, and the four positioning reinforcement strips surround a circle of sealed and expanded opening; a square waterproof sealing ring (annular seal) with strong adhesion is pasted on the positioning reinforcement strip on one of the cabinets, which can ensure that after the first cabinet and the second cabinet are merged, the merger between the first cabinet and the second cabinet is sealed to prevent dust, dirt, and condensation water droplets from entering the sealed room of the first cabinet and the second cabinet.

[0006] Support members for supporting the copper bar are provided in the opening windows of the first and second cabinets, and the positioning reinforcement strips are connected to the support members; the support members of the first and second cabinets are provided with card slots for positioning and supporting the copper bar; wherein, the copper bar of the first cabinet is located in the card slot, and the copper bar of the first cabinet is overlapped with the cabinet-connecting extension contact claw, and a rectangular card slot is provided in the middle of the support member for positioning and supporting the copper bar, which can prevent the copper bar from shifting under the action of electric force; the cabinet-connecting extension contact claw comprises an upper contact claw and a lower contact claw, and the tails of the upper and lower contact claws are respectively connected to the copper bar of the first cabinet, and a rotating member is provided between the upper and lower contact claws, and the rotating member is inserted into the upper and lower contact claws from top to bottom, and part of the rotating member is exposed at the top of the upper contact claw, and the rotating member sleeve on the top of the upper contact claw is provided with a compression spring for providing overlapping compression force between the cabinet-connecting extension contact claw and the copper bar.

[0007] The upper and lower contact claws are respectively provided with through holes, and the rotating member and the through holes are gap-matched, so that the upper and lower contact claws can move up and down and rotate along the rotating member, and the installation limit is performed through the tails of the upper and lower contact claws; the tails of the upper and lower contact claws are respectively provided with mounting holes for inserting connecting parts, and the connecting parts and the mounting holes are gap-matched to ensure that the tails of the upper and lower contact claws have a certain amount of floating in the up and down front and back directions, so that the cabinet expansion contact claws automatically adapt to the floating position error in the up and down front and back directions, and the connection is reliable, ensuring the electrical performance requirements such as the inter-cabinet resistance between the merged first cabinet and the second cabinet, the copper busbar is provided with a connecting hole corresponding to the connecting part, the connecting part and the connecting hole are interference-fitted, and the connecting hole of the copper busbar is tightly matched with the connecting part to ensure a firm and reliable connection; wherein, the connecting part is inserted from top to bottom into the tail of the upper contact claw, the copper busbar and the tail of the contact claw.

[0008] The connecting piece is an elastic pin.

[0009] There is a bite position between the upper and lower contact claws, and each copper bar of the first and second cabinets is respectively provided with an extension end, and a clamping groove matching the bite position is provided on the extension end, and the clamping groove is clamped (elastic bite and connection). At the bite position, the copper bar is overlapped through the bite position, the clamping groove and the cabinet extension contact claw, and the extension end is provided with a guide slope. The front ends of the top and bottom surfaces of the extension end of the copper bar are provided with guide slopes (that is, a double-sided slope pre-guide structure is adopted), and a semicircular clamping groove is opened, so that the copper bar and the cabinet extension contact claw are accurately positioned for bite overlap.

[0010] The support member is at least a leaf spring type bent member, and the shape of the support member is designed as a leaf spring type bent member. It can realize elastic deformation and displacement in the vertical and horizontal directions, and automatically adapt to the floating position error of the copper busbar in the up, down, left and right directions; a number of umbrella skirts are evenly distributed on the support member, and each umbrella skirt is arranged at intervals up and down to ensure that the insulation creepage distance meets the standard requirements; the positioning reinforcement strip is provided with an installation groove corresponding to the support member, and one end of the support member is embedded in the installation groove.

[0011] The copper busbars include the L1 / L3 left copper busbar and the L2 left copper busbar for cabinet extension arranged in the first cabinet, and the L1 / L3 right copper busbar and the L2 right copper busbar for cabinet extension arranged in the second cabinet; the L1 / L3 left and right copper busbars for cabinet extension adopt inward folding to lead out the extended connection end, which can ensure that the insulation distance between the copper busbar and the edge of the opening window is sufficient; the L2 left and right copper busbars for cabinet extension adopt a straight copper busbar structure to lead out the extended connection end.

[0012] The connecting plate is at least an L-shaped locking plate, and the side of the L-shaped locking plate is provided with a conical guide pin and a matching hole. The top connecting plates of the first and second cabinets are both provided with guide pins and matching holes; so that the first and second cabinets have a two-way guide positioning structure when they are merged, and the guidance is accurate and flexible; two matching holes are provided in the middle of the side of the L-shaped locking plate, which are used for locking connection between the cabinets after the first and second cabinets are merged, ensuring that the position of the extended contact claws of the cabinets and the copper busbar overlap is accurate and meets the qualified requirements. The connecting plate is fixed to the first cabinet or the second cabinet by screws.

[0013] The first and second cabinets are respectively provided with rear side panels, and the opening windows of the first and second cabinets are respectively arranged on the rear side panels; a reinforcing connecting plate is provided below the opening window of the first cabinet or the second cabinet; after merging, the first and second cabinets clamp the reinforcing connecting plate and are fixed by fasteners, and the fasteners penetrate the first cabinet, the reinforcing connecting plate and the second cabinet. A large elliptical or rectangular opening window is provided on the rear side panels of the first and second cabinets to ensure that the relative ground and phase-to-phase insulation distances of the three-phase copper busbar are sufficient; the reinforcing connecting plate is U-shaped, and two small connecting holes are provided in the middle of the reinforcing connecting plate to install the reinforcing connecting plate on the rear side panel of the first cabinet or the second cabinet, and a large hole is provided in the middle of the reinforcing connecting plate to penetrate and connect the rear side panel of the first cabinet, the reinforcing connecting plate and the rear side panel of the second cabinet to ensure that the position of the extended contact claws of the combined cabinets and the copper busbar overlap is accurate and meets the qualified requirements.

[0014] The insulating partition includes a vertical partition arranged in the first cabinet and a bent partition arranged in the second cabinet, and the bent partition is provided with an opening; after merging, one end of the vertical partition is butt-connected with the opening of the bent partition to form a closed phase-to-phase cabinet shield at the overlapping position of the copper busbar and the cabinet extension contact claw, ensuring that after merging, the insulation distance between the copper busbars of the first cabinet and the second cabinet is sufficient.

[0015] The air-insulated sealed switchgear is at least a medium-voltage air-insulated sealed switchgear; the bent partition includes two bent pieces, and the two bent pieces are connected and combined to form an open bent partition.

[0016] The beneficial effects of the present invention are as follows:

[0017] a. High reliability, using adaptive cabinet expansion contact claw structure, and after the cabinet is expanded, the parallel port can form a seal at the same time, and the interface is stable and reliable, ensuring the reliable operation of the switch cabinet;

[0018] b. The expansion and cabinet connection has high precision and accurate guidance. The expansion copper bar and contact claws are accurately positioned to meet the requirements of other electrical performance standards such as cabinet resistance, thus improving product quality.

[0019] c. Flexible and fast cabinet integration, low labor intensity in installation, greatly improving production efficiency;

[0020] d. Good versatility. This device can be installed with leaf spring insulating supports of different specifications to meet the installation requirements of various types and specifications of expanded copper bars, thereby adapting to the expansion and paralleling requirements of various series of cabinets and reducing costs.

[0021] In general, the cabinet merging guide of the air-insulated sealed switch cabinet side expansion device is accurate, flexible and fast in cabinet merging. After the cabinets are combined, they are sealed at the same time, with low cost. It is also suitable for expansion and cabinet merging occasions in construction sites and power rooms and factories. This side expansion device can be installed with leaf spring insulated supports with different specifications of slots to meet the installation requirements of various types and specifications of expansion copper bars. The air-insulated sealed switch cabinet side expansion device adopts an adaptive cabinet expansion contact claw structure. This cabinet expansion contact claw and copper bar are elastically engaged and connected, and can automatically adapt to the floating position error in the up and down front and back directions. The connection is reliable and can meet the electrical performance standard requirements such as cabinet resistance. This medium-voltage air-insulated sealed switch cabinet side expansion device adopts a large window type for the first time, combined with a high-insulation phase partition and an adaptive cabinet expansion contact claw structure, which greatly improves the accuracy, flexibility and reliability of switch cabinet expansion and cabinet merging. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the first and second cabinets before being combined according to an embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the first cabinet according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional partial structure of the first cabinet according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the connection structure between the support member and the positioning reinforcement strip according to an embodiment of the present invention.

[0026] Figure 5 It is a rear view of the first cabinet according to an embodiment of the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the second cabinet according to an embodiment of the present invention.

[0028] Figure 7 The figure is a schematic diagram of the extended end structure of a copper busbar according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the structure of the first and second cabinets before being combined according to an embodiment of the present invention.

[0030] Fig. 9 for Figure 8 Schematic diagram of the AA cross-section structure.

[0031] Fig.10This is a schematic diagram of the structure after the first and second cabinets are combined according to an embodiment of the present invention.

[0032] Fig.11 This is a schematic diagram of the structure in another orientation (top view) after the first and second cabinets are combined according to an embodiment of the present invention.

[0033] In the figure, 1 is a first cabinet, 2 is a second cabinet, 3 is an opening window, 4 is a cabinet extension contact claw, 4.1 is an upper contact claw, 4.2 is a lower contact claw, 4.3 is a bite position, 5 is a positioning reinforcement strip, 5.1 is a mounting groove, 6 is an annular seal, 7 is a connecting plate, 8 is a guide member, 9 is a vertical partition, 10 is a rear side plate, 11 is a support member, 11.1 is a card slot, 11.2 is an umbrella skirt, 12 is a rotating member, 13 is a compression spring, 14 is an extension end, 14.1 is a card slot, 14.2 is a guide slope, 15 is a connecting member, 16 is a cabinet extension L1 / L3 left copper bar, 17 is a cabinet extension L2 left copper bar, 18 is a cabinet extension L1 / L3 right copper bar, 19 is a cabinet extension L2 right copper bar, 20 is a reinforcing connecting plate, 21 is a bent partition, 21.1 is a connecting plate, 22 is a connecting plate, 23 is a connecting plate, 24 is a connecting plate, 25 is a connecting plate, 26 is a connecting plate, 27 is a connecting plate, 28 is a connecting plate, 29 is a connecting plate, 30 is a connecting plate, 31 is a connecting plate, 32 is a connecting plate, 33 is a connecting plate, 34 is a connecting plate, 35 is a connecting plate, 36 is a connecting plate, 37 is a connecting plate, 38 is a connecting plate, 39 is a connecting plate, 40 is a connecting plate, 41 is a connecting plate, 42 is a connecting plate, 43 is a connecting plate, 44 is a connecting plate, 45 is a connecting plate, 46 is a connecting plate, 47 is a connecting plate, 48 is a connecting plate, 49 is a connecting plate, For the opening. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] See also Figure 1-Figure 11 , an air-insulated sealed switch cabinet with a side expansion device, comprising a first cabinet 1 and a second cabinet 2, the first cabinet 1 and the second cabinet 2 are both provided with an opening window 3 for expansion, and the opening windows 3 of the two cabinets are provided with more than one copper bar, and an insulating partition is provided between two adjacent copper bars of the first cabinet 1 and the second cabinet 2; before merging, the copper bar of the first cabinet 1 or the second cabinet 2 is provided with a cabinet-joining expansion contact claw 4 for overlapping the copper bar, and each positioning reinforcement strip 5 of the first cabinet 1 or the second cabinet 2 is provided with an annular sealing member 6; the top of the first cabinet 1 and the second cabinet 2 is provided with a connecting plate 7, the first cabinet 1 and the second cabinet 2 are merged through the connecting plate 7, and the connecting plate 7 between the first cabinet 1 and the second cabinet 2 is provided with a guide member 8, so that the opening windows 3 of the first and second cabinets 1 and 2 after merging correspond to each other, and the copper bars of the first and second cabinets 1 and 2 after merging are respectively connected to the cabinet-joining expansion contact claw 4 in addition, each positioning reinforcement strip 5 of the combined first and second cabinets 1 and 2 is respectively in contact with the annular seal 6 and forms a seal.

[0036] The opening windows 3 of the first and second cabinets 1 and 2 are both provided with support members 11 for supporting the copper bar, and the positioning reinforcement strips 5 are connected to the support members 11; the support members 11 of the first and second cabinets 1 and 2 are both provided with a slot 11.1 for positioning and supporting the copper bar; wherein the copper bar of the first cabinet 1 is located in the slot 11.1, and the copper bar of the first cabinet 1 is overlapped with the cabinet extension contact claw 4; the cabinet extension contact claw 4 includes an upper contact claw 4.1 and a lower contact claw 4. .2, the tails of the upper and lower contact claws 4.1, 4.2 are respectively connected to the copper busbar of the first cabinet body 1, and a rotating member 12 is provided between the upper and lower contact claws 4.1, 4.2. The rotating member 12 is inserted into the upper and lower contact claws 4.1, 4.2 from top to bottom, and a part of the rotating member 12 is exposed at the top of the upper contact claw 4.1. The rotating member 12 at the top of the upper contact claw 4.1 is provided with a compression spring 13 for providing overlapping compression force between the cabinet extension contact claw 4 and the copper busbar.

[0037] The upper and lower contact claws 4.1 and 4.2 are respectively provided with through holes, and the rotating member 12 and the through holes are clearance-matched, so that the upper and lower contact claws 4.1 and 4.2 can move up and down and rotate along the rotating member 12, and the installation limit is performed by the tail of the upper and lower contact claws 4.1 and 4.2; the tail of the upper and lower contact claws 4.1 and 4.2 are respectively provided with mounting holes for inserting the connecting member 15, the connecting member 15 and the mounting holes are clearance-matched, the copper busbar is provided with a connecting hole corresponding to the connecting member 15, and the connecting member 15 and the connecting hole are interference-fitted; wherein, the connecting member 15 is inserted from top to bottom into the tail of the upper contact claw 4.1, the copper busbar and the tail of the contact claw 4.2.

[0038] A bite position 4.3 is provided between the upper and lower contact claws 4.1 and 4.2. Each copper bar of the first and second cabinets 1 and 2 is provided with an extension end 14, respectively. The extension end 14 is provided with a clamping groove 14.1 matching the bite position 4.3. The clamping groove 14.1 is clamped on the bite position 4.3. The copper bar is overlapped with the cabinet extension contact claw 4 through the bite position 4.3 and the clamping groove 14.1, and the extension end 14 is provided with a guide inclined surface 14.2.

[0039] The support member 11 is at least a leaf spring type bent member, and a plurality of sheds 11.2 are evenly distributed on the support member 11, and each shed 11.2 is arranged at intervals; the positioning reinforcement strip 5 is provided with a mounting groove 5.1 corresponding to the support member 11, and one end of the support member 11 is embedded in the mounting groove 5.1.

[0040] The copper bars include a left copper bar 16 for cabinet extension L1 / L3 and a left copper bar 17 for cabinet extension L2, which are arranged in the first cabinet body 1, and a right copper bar 18 for cabinet extension L1 / L3 and a right copper bar 19 for cabinet extension L2, which are arranged in the second cabinet body 2; the left and right copper bars 16 and 18 for cabinet extension L1 / L3 are folded inward to lead out the extended connection end; the left and right copper bars 17 and 19 for cabinet extension L2 are straight copper bar structures to lead out the extended connection end.

[0041] The connecting plate 7 is at least an L-shaped locking plate, and a tapered guide pin and a matching hole are provided on the side of the L-shaped locking plate.

[0042] The first and second cabinets 1 and 2 are respectively provided with rear side panels 10, and the opening windows 3 of the first and second cabinets 1 and 2 are respectively arranged on the rear side panels 10; a reinforcing connecting plate 20 is provided under the opening window 3 of the first cabinet 1 or the second cabinet 2; after being combined, the first and second cabinets 1 and 2 clamp the reinforcing connecting plate 20 and are fixed by fasteners, and the fasteners penetrate the rear side panel of the first cabinet 1, the reinforcing connecting plate 20 and the rear side panel of the second cabinet 2.

[0043] The insulating partition includes a vertical partition 9 arranged in the first cabinet body 1, and a bent partition 21 arranged in the second cabinet body 2, and the bent partition 21 is provided with an opening 21.1; after merging, one end of the vertical partition 9 and the opening 21.1 of the bent partition 21 are butt-connected to form a closed phase-to-phase cabinet shield at the overlap position of the copper busbar and the cabinet extension contact claw 4.

[0044] The air-insulated sealed switchgear is at least a medium-voltage air-insulated sealed switchgear; the bent partition 21 includes two bent pieces, and the two bent pieces are connected and combined to form an open bent partition 21.

[0045] The steps for merging the first and second cabinets 1 and 2 in this embodiment are as follows:

[0046] The first step is to position the reinforcing strips 5 to fit around the periphery of the opening windows 3 of the first and second cabinets 1 and 2, and to tighten them with countersunk screws, and to fix the connecting plate 7 on the tops of the first and second cabinets 1 and 2 with screws;

[0047] The second step is: connect the tail of the cabinet expansion contact claw 4 to the copper busbar in the first cabinet body 1 through the connecting piece 15, and the connecting piece 15 is an elastic pin; ensure that the connecting piece 15 (elastic pin) is vertically inserted into the connecting hole of the copper busbar, so as to ensure that the cabinet expansion contact claw 4 can automatically adapt to the floating position error, and require that the two compression springs in the cabinet expansion contact claw 4 are positioned upward.

[0048] The third step is: screw the other end of the left copper bar of the cabinet expansion L1 / L2 / L3 with the cabinet expansion contact claw 4 installed to the busbar wiring end in a cabinet to be expanded; screw the right copper bar with round hole end of the cabinet expansion L1 / L2 / L3 to the busbar wiring end in another cabinet to be expanded.

[0049] The fourth step is: insert the support member 11 from the cabinet expansion contact claw 4, so as to be embedded in the installation groove 5.1 in the positioning reinforcement strip 5; similarly, insert the support member 11 from the copper bar, so as to be embedded in the installation groove 5.1 in the positioning reinforcement strip 5. It is necessary to ensure that the bending direction of the support member 11 is toward the cabinet body, and the slot 11.1 in the middle of the support member 11 is smoothly inserted into the copper bar, so that the copper bar is positioned and supported well.

[0050] The fifth step is: installing the insulating partitions of the first cabinet 1 and the second cabinet 2 respectively.

[0051] The sixth step is to affix an annular seal 6 to the positioning reinforcement strip 5 on the first cabinet 1 or the second cabinet 2 to form a closed sealing annular belt. After the first cabinet 1 and the second cabinet 2 are combined, the cabinets are sealed at the same time to prevent condensation water droplets from entering the sealed chamber inside the cabinet.

[0052] The seventh step is: the reinforcing connecting plate 20 is fixed to the rear side plate 10 of the first cabinet 1 or the second cabinet 2 by screws, and the U-shaped opening of the reinforcing connecting plate 20 is ensured to face the outside of the cabinet.

[0053] Finally, start to merge the first cabinet 1 and the second cabinet 2, move the first cabinet 1 and the second cabinet 2 parallel to each other, and use the tapered guide parts 8 on the connecting plates 7 of the two to enter the corresponding holes of each other for bidirectional guiding positioning; then the vertical partition 9 of the first cabinet 1 is docked and inserted with the bent partition 21 of the second cabinet 2, and then the double-sided beveled insertion of the right copper busbar extension end of the cabinet extension L1 / L2 / L3 is performed, and elastically engages and docks with the cabinet extension contact claw 4, and automatically adapts to the floating error up and down and front and back to achieve accurate connection, during which the overlap quality of the copper busbar and the cabinet extension contact claw 4 can be observed. The first cabinet 1 and the second cabinet 2 continue to move parallel to each other, the annular seal 6 is in close contact with the end faces of the positioning reinforcement strips 5 of the first cabinet 1 and the second cabinet 2, and then the connecting plate 7 on the top of the first cabinet 1 and the second cabinet 2 is locked and connected with screws; at the lower part of the oval or rectangular opening window 3 of the side panel, the reinforcing connecting plate 20 and the rear side panels of the first cabinet 1 and the second cabinet 2 are locked and connected together with screws.

[0054] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for illustrating the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air-insulated sealed switch cabinet with a side expansion device, comprising a first cabinet body (1) and a second cabinet body (2), characterized in that The first and second cabinets (1, 2) are both provided with an opening window (3) for expansion, and at least one copper bar is provided in each of the opening windows (3), and an insulating partition is provided between two adjacent copper bars of the first cabinet (1) and the second cabinet (2); before merging, the copper bars of the first cabinet (1) or the second cabinet (2) are provided with a cabinet-joining expansion contact claw (4) for overlapping the copper bars, and each positioning reinforcement strip (5) of the first cabinet (1) or the second cabinet (2) is provided with an annular sealing member (6); the tops of the first and second cabinets (1, 2) are both provided with a connecting The first and second cabinets (1, 2) are combined by a connecting plate (7), and the connecting plate (7) between the first and second cabinets (1, 2) is provided with a guide member (8) so that the opening windows (3) of the combined first and second cabinets (1, 2) correspond to each other, and the copper bars of the combined first and second cabinets (1, 2) are respectively overlapped with the cabinet expansion contact claws (4); in addition, each positioning reinforcement strip (5) of the combined first and second cabinets (1, 2) is respectively in contact with the annular sealing member (6) to form a seal; A support member (11) for supporting the copper bar is provided in the opening window (3) of the first cabinet (1, 2), and a positioning reinforcement strip (5) is connected to the support member (11); The cabinet-joining extension contact claw (4) comprises an upper contact claw (4.1) and a lower contact claw (4.2); the tails of the upper and lower contact claws (4.1, 4.2) are respectively connected to the copper bar of the first cabinet body (1); a rotating member (12) is provided between the upper and lower contact claws (4.1, 4.2); the rotating member (12) is inserted into the upper and lower contact claws (4.1, 4.2) from top to bottom; a portion of the rotating member (12) is exposed at the top of the upper contact claw (4.1); and a compression spring (13) is provided on the rotating member (12) at the top of the upper contact claw (4.1) to provide overlapping compression force between the cabinet-joining extension contact claw (4) and the copper bar.

2. The air-insulated sealed switchgear with a side expansion device according to claim 1, characterized in that The upper and lower contact claws (4.1, 4.2) are respectively provided with through holes, and the rotating member (12) and the through holes are clearance-matched, so that the upper and lower contact claws (4.1, 4.2) can move up and down and rotate along the rotating member (12), and the upper and lower contact claws (4.1, 4.2) are installed and limited by the tails; the tails of the upper and lower contact claws (4.1, 4.2) are respectively provided with mounting holes for inserting the connecting member (15), the connecting member (15) and the mounting holes are clearance-matched, the copper busbar is provided with a connecting hole corresponding to the connecting member (15), and the connecting member (15) and the connecting hole are interference-fitted; wherein the connecting member (15) is inserted from top to bottom into the tail of the upper contact claw (4.1), the copper busbar and the tail of the contact claw (4.2).

3. The air-insulated sealed switchgear with a side expansion device according to claim 1, characterized in that A bite position (4.3) is provided between the upper and lower contact claws (4.1, 4.2); each copper bar of the first and second cabinet bodies (1, 2) is provided with an extension end (14), the extension end (14) is provided with a clamping groove (14.1) matching the bite position (4.3); the clamping groove (14.1) is clamped on the bite position (4.3); the copper bar is overlapped through the bite position (4.3), the clamping groove (14.1) and the cabinet-joining extension contact claw (4); and the extension end (14) is provided with a guide inclined surface (14.2).

4. The air-insulated sealed switchgear with a side expansion device according to claim 1, characterized in that The support member (11) is at least a leaf spring type bent member, a plurality of sheds (11.2) are evenly distributed on the support member (11), and each shed (11.2) is arranged at intervals; the positioning reinforcement strip (5) is provided with a mounting groove (5.1) corresponding to the support member (11), and one end of the support member (11) is embedded in the mounting groove (5.1).

5. The air-insulated sealed switch cabinet with a side expansion device according to claim 1, characterized in that The copper bars include a cabinet-joining extension L1 / L3 left copper bar (16) and a cabinet-joining extension L2 left copper bar (17) arranged in the first cabinet body (1), and a cabinet-joining extension L1 / L3 right copper bar (18) and a cabinet-joining extension L2 right copper bar (19) arranged in the second cabinet body (2); the cabinet-joining extension L1 / L3 left and right copper bars (16, 18) adopt an inwardly folded extension connection end; the cabinet-joining extension L2 left and right copper bars (17, 19) adopt a straight copper bar structure to lead out the extension connection end.

6. The air-insulated sealed switchgear with a side expansion device according to claim 1, characterized in that The connecting plate (7) is at least an L-shaped locking plate, and a tapered guide pin and a matching hole are provided on the side of the L-shaped locking plate; The support members (11) of the first and second cabinets (1, 2) are both provided with a slot (11.1) for positioning and supporting the copper busbar; wherein the copper busbar of the first cabinet (1) is located in the slot (11.1), and the copper busbar of the first cabinet (1) is overlapped with a cabinet-joining extension contact claw (4).

7. The air-insulated sealed switchgear with a side expansion device according to claim 1, characterized in that The first and second cabinets (1, 2) are respectively provided with a rear side plate (10), and the opening windows (3) of the first and second cabinets (1, 2) are respectively arranged on the rear side plate (10); a reinforcing connecting plate (20) is provided below the opening window (3) of the first cabinet (1) or the second cabinet (2); after being combined, the first and second cabinets (1, 2) clamp the reinforcing connecting plate (20) and are fixed by fasteners, and the fasteners penetrate the rear side plate of the first cabinet (1), the reinforcing connecting plate (20) and the rear side plate of the second cabinet (2).

8. The air-insulated sealed switch cabinet with a side expansion device according to claim 1, characterized in that The insulating partition comprises a vertical partition (9) arranged in the first cabinet (1), and a bent partition (21) arranged in the second cabinet (2), wherein the bent partition (21) is provided with an opening (21.1); after being combined, one end of the vertical partition (9) and the opening (21.1) of the bent partition (21) are butt-jointed to form a closed phase-to-phase cabinet shield at the overlap position of the copper busbar and the cabinet-joining extension contact claw (4).

9. The air-insulated sealed switchgear with a side expansion device according to any one of claims 1 to 8, characterized in that The air-insulated sealed switch cabinet is at least a medium-voltage air-insulated sealed switch cabinet; the bent partition (21) comprises two bent parts, and the two bent parts are connected and combined to form an open bent partition (21).

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