Inflatable cabinet side parallel casing pipe tightening device and inflatable cabinet group

Abstract

The utility model discloses an inflatable cabinet side parallel casing pipe tightening device and an inflatable cabinet set in the technical field of power switch equipment, the inflatable cabinet side parallel casing pipe tightening device comprises fixing blocks, clamping blocks and threaded connecting pieces, the fixing blocks are arranged on adjacent side plates of an inflatable cabinet in pairs, the clamping blocks move in the direction close to or away from the fixing blocks, and the threaded connecting pieces are connected with the threaded connecting pieces. The clamping blocks are provided with dovetail grooves in the direction facing the fixing blocks, the fixing blocks are provided with angular protrusions in the direction facing the clamping blocks, the angular protrusions are matched with the single groove faces, close to the fixing side plates, of the dovetail grooves, and after the paired fixing blocks are spliced, the angular protrusions of the two fixing blocks form a complete protruding dovetail matched with the groove faces of the dovetail grooves. According to the scheme, the problems of insulation hidden danger and stress hidden danger caused by poor tightening effect of a tightening support in the prior art are solved, and the beneficial effects of improving the tightening effect and guaranteeing the insulation performance are achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power switch equipment, in particular to a side and sleeve pipe fastening device of an air-filled cabinet and an air-filled cabinet group. BACKGROUND

[0002] The air-filled cabinet product fastens the cabinet top plate and the front and back plates through a supporting piece, so as to ensure reliable connection of the side and sleeve pipe. However, for some products, the supporting piece is far away from the sleeve pipe, and the effect is not good. Even for some compact structure products, the front and back plates do not have space for the fastening supporting piece. In recent years, the air-filled cabinet with environment-friendly gas insulation has been developed and put into the market, and the air-filled pressure of the cabinet is greatly increased compared with the traditional products, which brings the negative effect of increased deformation of the side plate. At this time, the side and sleeve pipe fastening device is unreliable. Figure 2 In the typical side and sleeve pipe system, the side plate of the air-filled cabinet gas tank will be deformed outward due to the high-pressure gas filled in the tank. At this time, the B-phase side and sleeve pipe located in the middle will be higher than the A-phase and C-phase side and sleeve pipes. When the B-phase is fully assembled and pressed, the silicone of the A-phase and C-phase mother line connectors may not be completely compressed, and there is a gap between the silicone surface and the inner wall of the sleeve pipe. At this time, the insulation performance of the side and sleeve pipe system cannot be guaranteed, and the local discharge may exceed the standard, or the withstand voltage may be broken down. Therefore, it is particularly important to set a device for shortening the distance of the sleeve pipe. The conventional product sets a supporting piece on the top plate and the front and back plates of the side plate, and shortens the distance between the cabinets by screwing the supporting piece, so as to achieve the effect. However, when the distance between the front and back plates and the top plate and the side and sleeve pipe is far away, the hard supporting piece will compress the side plate with the area expanded by the gas pressure into a wave shape, so that the sleeve pipe cannot be parallel and fastened, and insulation and stress hidden dangers are caused. SUMMARY

[0003] In view of the defects of the prior art, the application provides a side and sleeve pipe fastening device of an air-filled cabinet, so as to solve the problem of insulation and stress hidden dangers caused by the poor fastening effect of the fastening supporting piece of the prior art.

[0004] To achieve the above purpose, the application is implemented by the following technical scheme:

[0005] The side and bushing tightening device of the gas-filled cabinet comprises fixing blocks, a clamping block and a threaded connecting piece. The fixing blocks are arranged in pairs and are fixed to corresponding positions of the same height on the adjacent side plates of the gas-filled cabinet. The clamping block is a moving part and moves in a direction parallel to the side plates to approach or move away from the fixing blocks. The clamping block is provided with a dovetail groove in the direction of the fixing blocks, and the cross section of the dovetail groove is perpendicular to the side plates and the groove bottom is parallel to the side plates. The fixing blocks are provided with angular protrusions matching the single groove surface of the dovetail groove close to the fixed side plates in the direction of the clamping block. When the fixing blocks are relatively combined in the direction perpendicular to the side plates, the angular protrusions of the two fixing blocks form a complete protruding dovetail matching the groove surface of the dovetail groove. The threaded connecting piece passes through the clamping block and the fixing blocks in the direction of the movement of the clamping block and is fixed in a relative position perpendicular to the direction of the movement of the clamping block with one of the fixing blocks. The clamping block moves by using the thread of the threaded connecting piece.

[0006] Preferably, the threaded connecting piece is fixed in a relative position perpendicular to the direction of the movement of the clamping block with one of the fixing blocks by using a binding strip. The fixing block is provided with a binding strip hole perpendicular to the direction of the movement of the clamping block between the threaded connecting piece hole and the side plate.

[0007] Preferably, the binding strip uses a fixing rope or a binding strap.

[0008] Preferably, the surface of the fixing block is provided with a binding strip avoiding groove at the position of the binding strip.

[0009] Preferably, the threaded connecting piece uses a bolt connecting pair. The bolt of the bolt connecting pair is preassembled in the direction from the clamping block to the fixing block. The nut of the bolt connecting pair is located on the side of the fixing block away from the clamping block.

[0010] Preferably, the bolt of the bolt connecting pair uses a hexagonal head bolt.

[0011] Preferably, the clamping block is provided with a bolt head clamping groove in the direction away from the fixing block. The bolt head clamping groove clamps the hexagonal head of the bolt to keep the bolt fixed in the rotating direction with the clamping block.

[0012] Preferably, the bolt connecting pair further comprises a washer.

[0013] Preferably, the washer uses a spring washer.

[0014] Based on the same inventive concept, the application also discloses a gas-filled cabinet group comprising two adjacent gas-filled cabinets. A row of side and bushing assemblies are regularly arranged and installed at corresponding positions on the opposite side plates of the gas-filled cabinets. The corresponding side and bushing assemblies are connected with each other by using a bus coupler. Side and bushing tightening devices as described above are arranged and installed on the adjacent side plates of the gas-filled cabinets at corresponding positions of the same height and on the two sides close to the side and bushing assemblies. The fixing blocks of the tightening devices are fixedly installed on the side plates.

[0015] The application has the advantages that the silicone sleeve of the bus coupler of the side-parallel bushing and tightening device and the side-parallel bus coupling system is larger than the inner diameter of the bushing inner cavity, when the bushing is installed to the designed position, the silicone of the bus coupler is fully compressed and shrunk to the shape and size of the bushing inner cavity, the tight fit of the silicone and the bushing inner cavity wall makes the air in the overlapping surface exhaust, so that the device can guarantee the silicone of the side-parallel bushing and bus coupler fully compressed after being tightened, and the insulation performance is guaranteed, and the device does not occupy the space of the top plate and the front and rear plates, and solves the problem that the compact equipment cannot install the tightening support. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an embodiment of the side-parallel bushing and tightening device;

[0017] Figure 2 It is an embodiment of the side-parallel bushing and tightening device installed between the typical side-parallel system cabinets;

[0018] Figure 3 It is an embodiment of the side-parallel bushing and tightening device before installation;

[0019] Figure 4 It is an embodiment of the side-parallel bushing and tightening device during installation;

[0020] Figure 5 It is an embodiment of the side-parallel bushing and tightening device after installation;

[0021] 1a-left cabinet, 1b-right cabinet, 11a-front tightening device, 11b-rear tightening device, 111-fixing block, 112-clamping block, 113-bundling strip, 114-bolt, 115-nut, 12a-A phase side-parallel bushing, 12b-B phase side-parallel bushing, 12c-C phase side-parallel bushing, 13-side plate, 2-bus coupler, L-cabinet distance. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments.

[0023] The application provides an embodiment of a side and sleeve pipe and fastening device of an air charging cabinet, which comprises a fixed block 111, a clamping block 112 and a bolted pair, and the bolted pair uses a hexagonal head bolt 114 and a nut 115. The fixed block 111 is a right trapezoidal block, one side of the short side of the trapezoid is welded on a side plate 13, and a semicircular hole is formed in the middle of one side of the long side, which is used for placing the bolt 114. The clamping block 112 is in a dovetail structure, the angle in the dovetail matches the angle of the inclined side of the clamping block 112 opposite to the fixed block 111, so that the contact surfaces of the two blocks can be flat after installation. The fixed hexagonal head bolt 114 passes through the clamping block 112 from below, the lower part of the clamping block 112 is provided with a clamping block groove, the hexagonal head of the bolt 114 is clamped in the clamping block groove, the other end of the bolt is pre-assembled with the nut 115, and then the binding strip 113 passes through the binding strip hole on the fixed block 111 to bind the bolt 114. When the two cabinets are combined, the left and right fixed blocks 111 are tightly attached, the nut 115 is tightened to drive the bolt 114 to displace and pull up the clamping block 112 until it is in place. It should be noted that the diagonal distance of the clamping block 112 is much greater than the distance L between the two cabinets, so the clamping block 112 will not be idle when the nut is tightened.

[0024] In the embodiment, the binding strip 113 uses a fixed rope, and a strap can also be used. When the left and right fixed blocks 111 are tightly attached, there will be a gap, and a binding strip avoiding groove can be arranged on the side of the fixed block 111 along the position of the binding strip to eliminate the gap. Corresponding binding strip avoiding grooves can also be arranged on the joint surface of the other fixed block 111 to eliminate the gap. The binding strip 113 can be discarded after the cabinets are combined.

[0025] The way of fixing the relative position of the threaded connecting piece and the fixed block 111 perpendicular to the movement direction of the clamping block 112 can also use other ways, such as directly setting an internal thread in the threaded connecting piece hole on the fixed block 111, and using an asymmetric setting way for the left and right fixed blocks 111, one side of the fixed block 111 containing most or all of the threaded connecting piece hole to save the binding strip 113. In some suitable ways of this fixing, the threaded connecting piece can directly use a screw to save the nut 115, and the tightening way of the fastener is changed from tightening the nut from the upper side to tightening the screw head from the lower side.

[0026] In the fixing way using the bolted pair, the bolted pair can also include a washer, which can be placed between the bolt head and the clamping block 112 or between the nut 115 and the fixed block 111. The washer can use a spring washer to enhance the fastening effect.

[0027] Based on the same inventive concept, the application also discloses a gas-filled cabinet group, which comprises two adjacent gas-filled cabinets, namely a left cabinet 1a and a right cabinet 1b in the embodiment, and a row of side bushings are regularly arranged and installed at corresponding positions on opposite side plates 13 of the gas-filled cabinets, wherein the A-phase side bushing 12a, the B-phase side bushing 12b and the C-phase side bushing 12c are horizontally and equidistantly arranged, the corresponding side bushings of the left cabinet 1a and the right cabinet 1b are connected with each other by means of a bus coupler 2, and a side bushing and tightening device is arranged and installed at the same height and corresponding position on the adjacent side plates 13 of the gas-filled cabinets and close to the side bushings on the outer sides of the side bushings, and the fixed block 111 of the tightening device is fixedly installed on the side plate 13. In the embodiment, the tightening device is divided into a front tightening device 11a and a rear tightening device 11b, and the positions of the front and rear tightening devices are close to the outermost side bushings, i.e., the front tightening device 11a is close to the A-phase side bushing 12a, and the rear tightening device 11b is close to the C-phase side bushing 12c, and the fixed block 111 of the tightening device is fixedly installed on the side plate 13 by means of welding to form a welding block, i.e., the short side of the welding block in the trapezoidal shape is welded on the side plate 13, and the fixed mode can also adopt a screw fastening mode but needs to open screw holes in the horizontal direction.

[0028] When the embodiment is used, a welding block is welded in front of and behind a group of bushings on the side plate 13 of the gas tank, and a bolt 114 with a clamp block 112 and a nut 115 is bound. As shown in the previous step of installation, the bus coupler 2 is placed in each phase bushing, the right cabinet 1b is pushed close to the left cabinet 1a, the bushing of the right cabinet 1b is inserted into the bus coupler 2, the bushing screw of the whole cabinet frame is tightened, and the installation state is achieved. At this time, due to the deformation of the side plate 13 of the gas tank, the distance between the A-phase and C-phase bushings has not been tightened in place, the nut 115 is tightened by means of a tool sleeve to pull the clamp block 112, the dovetail groove of the clamp block 112 is moved upward to pull the fixed blocks 111 of the left and right cabinets, the distance between the bushings beside the welding block is simultaneously shortened, and the target effect of tightening is achieved. In the embodiment, the tightening device is vertically installed in the upward and downward directions, and in actual application, any suitable direction can also be adopted.

[0029] The above is only a preferred specific implementation manner of the scheme, but the protection scope required by the scheme is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A device for tightening and connecting the side sleeve of a gas-filled cabinet, characterized in that: The device includes a fixing block (111), a clamping block (112), and a threaded connector. The fixing blocks (111) are arranged in pairs and each is fixed to a corresponding position at the same height on the adjacent side plate (13) of the gas-filled cabinet. The clamping block (112) is a moving part and moves in a direction parallel to the side plate, moving closer to or away from the fixing block (111). The clamping block (112) is provided with a dovetail groove with a cross section perpendicular to the side plate (13) and a groove bottom parallel to the side plate (13) facing the fixing block (111). The fixing block (111) is provided with a clamping block (112) facing the fixing block (112). There are angular protrusions that match the single groove surface of the dovetail groove near the fixed side plate (13). After the pair of fixed blocks (111) are spliced ​​together in a direction perpendicular to the side plate (13), the angular protrusions of the two fixed blocks (111) form a complete dovetail protrusion that matches the groove surface of the dovetail groove. The threaded connector passes through the clamping block (112) and the fixed block (111) along the movement direction of the clamping block (112) and is fixed in a relative position with one of the fixed blocks (111) in a direction perpendicular to the movement direction of the clamping block (112). The clamping block (112) uses the threaded movement of the threaded connector.

2. The gas-filled cabinet side-mounted sleeve tightening device according to claim 1, characterized in that: It also includes a binding strip (113), the threaded connector is fixed in a relative position with one of the fixing blocks (111) in a direction perpendicular to the movement direction of the clamping block (112) by using the binding strip (113), the fixing block (111) has a binding strip hole between the threaded connector through hole and the side plate (13) in a direction perpendicular to the movement direction of the clamping block (112).

3. The gas-filled cabinet side-mounted sleeve tightening device according to claim 2, characterized in that: The binding strip (113) is made of a fixing rope or cable tie.

4. The gas-filled cabinet side-mounted sleeve clamping device according to claim 3, characterized in that: The surface of the fixing block (111) is provided with a binding strip avoidance groove along the binding strip position.

5. The gas-filled cabinet side-mounted sleeve clamping device according to claim 4, characterized in that: The threaded connector uses a bolt connection pair, wherein the bolt (114) of the bolt connection pair is pre-installed from the direction of the clamping block (112) away from the fixing block towards the fixing block (111), and the nut (115) of the bolt connection pair is located on the side of the fixing block (111) away from the clamping block.

6. The gas-filled cabinet side-mounted sleeve clamping device according to claim 5, characterized in that: The bolts (114) of the bolted connection pair are hexagonal head bolts.

7. The gas-filled cabinet side-mounted sleeve clamping device according to claim 4, characterized in that: The clamping block (112) is provided with a bolt head clamping groove in the direction of the fixed block. The bolt head clamping groove clamps the hexagonal head of the bolt (114) so ​​that the bolt is fixed to the clamping block (112) in the direction of rotation.

8. The gas-filled cabinet side-mounted sleeve clamping device according to claim 5, characterized in that: The bolted connection also includes washers.

9. The gas-filled cabinet side-mounted sleeve tightening device according to claim 8, characterized in that: The washer used is a spring washer.

10. An air-insulated cabinet assembly, comprising two adjacent air-insulated cabinets, wherein a row of side-mounted sleeves is regularly arranged and installed on the opposite side plates (13) of the air-insulated cabinets, and the corresponding side-mounted sleeves are interconnected by a bus coupler (2), characterized in that: On the adjacent side plate (13) of the gas cabinet, at the corresponding position of the same height, near the side sleeve on both sides outside the side sleeve, there is a gas cabinet side sleeve clamping device as described in any one of claims 1 to 9, and the fixing block (111) of the clamping device is fixedly installed on the side plate (13).

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