Protective cover and inter-panel busbar connection

Abstract

To provide a protective cover and an inter-board bus-bar connection part that can be constructed by any operator at a stable quality and in a short time.SOLUTION: The protective cover includes: a first cover body and a second cover body constituting a two-split structure; and latch members that latch the first cover body and the second cover body. The first cover body and the second cover body each have a semi-cylindrical cover main body extending in a longitudinal direction, connection port cover parts provided on both ends in the longitudinal direction of the cover main body and attached to cable protection metal fittings fixed to bushings, and junction flange parts provided continuously from the cover main body and / or the connection port cover parts so as to extend in the longitudinal direction and protruding in a first direction orthogonal to the longitudinal direction. The junction flange parts of the first cover body and the junction flange parts of the second cover body are joined by the latch members in a state abutting on each other.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a protective cover and an inter-panel busbar connection portion suitable for inter-panel connections in electric power equipment such as gas-insulated switchgear. [Background technology]

[0002] Generally, a cubicle-type gas insulated switchgear (hereinafter referred to as "C-GIS") is equipped with multiple devices such as circuit breakers and disconnecting switches. Each device is provided with a bushing for receiving and supplying power. The bushing has a structure in which, for example, an internal conductor electrically connected to the circuit unit of the device and an insulating tube are integrally formed. The bushing is, for example, arranged on the top surface of the housing of the C-GIS.

[0003] The bushings are interconnected by insulated busbars. The connection between the bushings is called an "inter-panel connection," and the insulated busbar used for the inter-panel connection is called an "inter-panel busbar." The inter-panel busbar is arranged, for example, along the top surface of the C-GIS housing, with a predetermined gap from the top surface of the housing.

[0004] For short inter-panel busbars (for example, between panels less than 1000 mm), a cable core is used in which the outer jacket (also called cable sheath), shielding layer, and outer semiconductive layer are removed from a 66 kV class XLPE cable, and the semiconductive layer is regenerated.The outer surface of the inter-panel busbar is protected by a metal shielding treatment that extends from the cable protection fitting fixed to one bushing to the cable protection fitting fixed to the other bushing, and an anti-corrosion layer is formed on the outer surface of the metal shield.

[0005] When the semiconductive layer of a cable used for an inter-panel busbar is restored, for example, a semiconductive polyethylene tape is wound around it and then heated and molded. Metal shielding is performed by connecting the cable with the restored semiconductive layer to a bushing as an inter-panel busbar, then winding a braided wire spirally around the semiconductive layer of the restored inter-panel busbar so that it contacts the semiconductive layer, and connecting both ends of the braided wire to respective cable protection fittings. Furthermore, a corrosion-resistant layer is formed on the outer surface of the semiconductive layer after the metal shielding process by wrapping a self-fusing insulating tape, PVC tape, or the like around it.

[0006] Patent Document 1 discloses that a short inter-panel busbar made of a cable core is placed between a pair of T-shaped bushings in advance, and a two-piece protective cover is placed so as to straddle the cable protection fittings, with a sealing body (anti-corrosion layer) provided on the outer periphery of the protective cover. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 1-137579 Summary of the Invention [Problem to be solved by the invention]

[0008] In recent years, in order to miniaturize power equipment such as C-GIS, the gap between the top surface of the C-GIS housing and the inter-panel busbar has also become smaller. As a result, the work of forming the corrosion protection layer is extremely complicated, and there is a risk that the quality of the corrosion protection layer will vary depending on the skill level of the worker. When it is not possible to simply pass a roll of insulating tape through the gap between the top surface of the housing and the inter-panel busbar (cable core), for example, the insulating tape is cut to a certain length and then wrapped around the outer surface of the inter-panel busbar to form the corrosion protection layer.

[0009] An object of the present invention is to provide a protective cover and an inter-panel busbar connection part that can be installed with stable quality and in a short time, regardless of the skill level of the worker. [Means for solving the problem]

[0010] The protective cover according to the present disclosure comprises: A protective cover for an inter-panel busbar that electrically connects bushings provided in power equipment, a first cover body and a second cover body that constitute a two-part structure; a locking member that locks the first cover body and the second cover body, The first cover body and the second cover body each include: a semi-cylindrical cover body portion extending in the longitudinal direction; a cable protection fitting provided at each end of the cover body in the longitudinal direction and fixed to the bushing; Outer perimeter of a connection port cover attached to the a joint flange portion that is connected to the cover body portion and / or the connection port cover portion so as to extend in the longitudinal direction and that protrudes in a first direction perpendicular to the longitudinal direction, The joining flange portion of the first cover body and the joining flange portion of the second cover body are joined by the locking member in a state of being in contact with each other. 、 The joining flange portion has a positioning uneven structure on the joining surface, The uneven structure is a linear recess formed along a longitudinal direction on either the joining flange portion of the first cover body or the joining flange portion of the second cover body; a linear convex portion formed along the longitudinal direction on the other of the joining flange portion of the first cover body and the joining flange portion of the second cover body, A caulking material is interposed between the recess and the protrusion. .

[0011] The inter-panel busbar connection part according to the present disclosure includes: An inter-panel busbar connection that electrically connects bushings of power equipment, Inter-panel busbars and a cable protection fitting fixed to the bushing; a protective cover provided on an outer periphery of the inter-panel busbar, The protective cover is a first cover body and a second cover body that constitute a two-part structure; a locking member that locks the first cover body and the second cover body, The first cover body and the second cover body each include: a semi-cylindrical cover body portion extending in the longitudinal direction; The cable protection fittings are provided at both ends of the cover body in the longitudinal direction. Outer perimeter of a connection port cover attached to the a joint flange portion that is connected to the cover body portion and / or the connection port cover portion so as to extend in the longitudinal direction and that protrudes in a first direction perpendicular to the longitudinal direction, The joining flange portion of the first cover body and the joining flange portion of the second cover body are joined by the locking member in a state of being in contact with each other. 、 The joining flange portion has a positioning uneven structure on the joining surface, The uneven structure is a linear recess formed along a longitudinal direction on either the joining flange portion of the first cover body or the joining flange portion of the second cover body; a linear convex portion formed along the longitudinal direction on the other of the joining flange portion of the first cover body and the joining flange portion of the second cover body, A caulking material is interposed between the recess and the protrusion. . [Effects of the Invention]

[0012] According to the present invention, an inter-panel busbar connection can be constructed with stable quality and in a short time, regardless of the skill level of the worker. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a side view showing an inter-panel busbar connection according to one embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing an inter-panel busbar connection portion. [Figure 3A] FIG. 3A is a cross-sectional view showing the internal structure of an inter-panel busbar connection portion. [Figure 3B] FIG. 3B is an enlarged detailed cross-sectional view of a portion of FIG. 3A. [Figure 4] FIG. 4 is a perspective view showing the structure of the protective cover. [Figure 5]FIG. 5 is an exploded perspective view showing the structure of the protective cover. [Figure 6] FIG. 6 is a half cross-sectional view showing the structure of the protective cover. [Figure 7] FIG. 7 is a front view showing the structure of the protective cover. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0015] FIG. 1 is a side view showing an inter-panel busbar connection 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the inter-panel busbar connection 1. FIG. 3A is a cross-sectional view showing the internal structure of the inter-panel busbar connection 1. FIG. 3B is a detailed cross-sectional view enlarging a portion of FIG. 3A. FIG. 3B shows an enlarged view of the connection portion with the first bushing 22A side.

[0016] The inter-panel busbar connection unit 1 electrically connects a plurality of pieces of equipment (between panels) provided in electric power equipment such as C-GIS. In this embodiment, a case will be described in which the inter-panel busbar connection unit 1 connects a first bushing 22A and a second bushing 22B provided in the equipment. The first bushing 22A and the second bushing 22B are provided for each phase of the power cable. A first cable protection fitting 21A is provided at the cable connection portion of the first bushing 22A, and a second cable protection fitting 21B is provided at the cable connection portion of the second bushing 22B.

[0017] Hereinafter, when there is no need to distinguish between the first bushing 22A and the second bushing 22B, they will be referred to as "bushings 22A, 22B." Similarly, when there is no need to distinguish between the first cable protection fitting 21A and the second cable protection fitting 21B, they will be referred to as "cable protection fittings 21A, 21B."

[0018] As shown in Figure 1 and other figures, the inter-panel busbar connection part 1 includes an inter-panel busbar 30 (see Figure 3), cable protection fittings 21A and 21B, and a protective cover 10. The inter-panel busbar connection part 1 is assembled by attaching terminal portions on both longitudinal sides of the inter-panel busbar 30 to bushings 22A and 22B and cable protection fittings 21A and 21B, and by attaching a protective cover 10 to the outer periphery of the inter-panel busbar 30. The inter-panel busbar connection part 1 is suitable for connecting short panels, for example, where the length W between bushings 22A and 22B (inter-panel length) is less than 1000 mm.

[0019] Although not shown, the bushings 22A and 22B have a configuration in which the internal conductor and insulating tube are integrally formed by molding, for example. One end of the internal conductor is electrically connected to a circuit unit of equipment installed in the C-GIS, and the other end is electrically connected to the conductor of the inter-panel busbar 30. The insulating tube is formed, for example, from a hard plastic resin material with high mechanical strength (e.g., epoxy resin or fiber reinforced plastics (FRP)). The bushings 22A and 22B have, for example, a T-shape and are placed on the top surface of the housing C of the C-GIS.

[0020] When bushings 22A, 22B are T-shaped, the internal conductor branches outside the equipment, one of which is electrically connected to the conductor of inter-panel busbar 30, and the other is used with a capped section such as an insulating plug after connecting inter-panel busbar 30. The length W between bushings 22A, 22B is the horizontal distance between the center of the internal conductor of first bushing 22A located inside the equipment and the center of the internal conductor of second bushing 22B located inside the equipment.

[0021] The inter-panel busbar 30 is composed of a cable core, for example, obtained by removing the outer jacket (also called cable sheath), shielding layer, and outer semiconductive layer from a 66 kV-class XLPE cable, and then forming (also called regeneration) a semiconductive layer. A metal shielding layer (not shown) is provided on the outer surface of the cable core. The semiconductive layer regenerated in the inter-panel busbar 30 is formed, for example, by winding semiconductive polyethylene tape and then heat-molding it. The metal shielding layer is formed by winding a braided wire spirally around the outer periphery of the semiconductive layer of the inter-panel busbar 30 so as to be in contact with the semiconductive layer over the entire length of the semiconductive layer, and is electrically connected to the first cable protection fitting 21A and the second cable protection fitting 21B.

[0022] Although not shown, connecting materials such as conductor connection terminals, stress cones, and stress cone compression devices are attached to both ends of the inter-panel busbar 30. The inter-panel busbar 30 is connected to the bushings 22A and 22B via these connecting materials.

[0023] Cable protection fittings 21A and 21B have, for example, a two-stage cylindrical shape. Specifically, cable protection fittings 21A and 21B have large diameter portion 211 that is fixed to bushings 22A and 22B, and small diameter portion 212 to which protective cover 10 is attached. Spacer 213 is disposed at the open end of small diameter portion 212.

[0024] The protective cover 10 is a protective member provided in place of a conventional anticorrosion layer, and is arranged to cover the outer periphery of the exposed portion between the cable protection fittings of the inter-panel busbar 30. The protective cover 10 is formed, for example, by injection molding of resin. The protective cover 10 is formed of an insulating resin material. As the resin material for the protective cover 10, insulating resins such as ABS (acrylonitrile butadiene styrene) resin or PVC (polyvinyl chloride) are suitable, but flame-retardant ABS may also be used.

[0025] In this way, the inter-panel busbar connection part 1 is an inter-panel busbar connection part that electrically connects bushings 22A and 22B of C-GIS (electric power equipment), and is equipped with an inter-panel busbar 30, cable protection fittings 21A and 21B fixed to the bushings 22A and 22B, and a protective cover 10 provided on the outer periphery of the inter-panel busbar 30.

[0026] 4 and 5 are perspective views showing the structure of the protective cover 10. In FIG. 5, the first cover body 10A and the second cover body 10B are shown in an exploded state before being joined together. FIG. 6 is an enlarged half-sectional view showing the vicinity of one connection port cover portion 12 of the protective cover 10. In FIG. 6, the first cover body 10A is shown in cross section. FIG. 7 is a front view of the protective cover 10 as seen from the side of one connection port cover portion 12.

[0027] As shown in Figures 4 to 7, the protective cover 10 has a first cover body 10A and a second cover body 10B that form a two-piece structure. The first cover body 10A and the second cover body 10B are locked and fixed by a locking member 15. Hereinafter, when there is no need to distinguish between the first cover body 10A and the second cover body 10B, they will be referred to as "cover bodies 10A, 10B."

[0028] Each of the cover bodies 10A and 10B has a cover main body 11, a connection port cover 12, and joint flanges 13 and 14. The first cover body 10A and the second cover body 10B have substantially the same configuration. The cover bodies 10A and 10B are formed to be relatively thin so that they can be easily placed in the gap G (see Figure 1) between the C-GIS housing C and the inter-panel busbar 30.

[0029] The cover body 11 has a semi-cylindrical shape extending in the longitudinal direction. The cover body 11 covers the outer peripheral surface of the portion of the inter-panel busbar 30 that is exposed from the cable protection fittings 21A, 21B. The inner diameter of the cover body 11 only needs to be larger than the outer diameter of the inter-panel busbar 30.

[0030] The connection port covers 12 are provided on both longitudinal ends of the cover body 11. The connection port covers 12 are formed so as to bulge radially outward at both ends of the cover body 11. The inner diameter of the connection port covers 12 is larger than the inner diameter of the cover body 11 and is also larger than the outer diameter of the small diameter portions 212 of the cable protection fittings 21A, 21B to which the protective cover 10 is attached. The connection port covers 12 are fitted onto the outer peripheral surfaces of the small diameter portions 212 of the cable protection fittings 21A, 21B.

[0031] The joining flanges 13, 14 are formed to extend in the longitudinal direction over the entire length of the cover bodies 10A, 10B. The joining flanges 13, 14 protrude like brim so as to be spaced apart from each other in a first direction perpendicular to the longitudinal direction. The joining flanges 13, 14 are formed with pin insertion holes 131, 141 at predetermined intervals along the longitudinal direction. The cover bodies 10A, 10B are joined together by inserting locking members 15 into the pin insertion holes 131 with the joining surfaces of the joining flanges 13, 14 abutting against each other.

[0032] The joining flange portions 13, 14 may be provided at the same longitudinal position on the first cover body 10A and the second cover body 10B, and may be formed partially on the cover main body portion 11 or the connection port cover portion 12, for example.

[0033] The locking members 15 are configured, for example, as so-called push rivets, in which the legs spread like wings when the pin head is pressed, making them difficult to remove. With the joining flanges 13, 14 of the cover bodies 10A, 10B aligned and their joining surfaces abutting against each other, the cover bodies 10A, 10B can be joined by simply inserting multiple locking members 15 (a total of 22 in this embodiment) into the pin insertion holes 131, 141 of the joining flanges 13, 14 from the side of the first cover body 10A, which is located on the upper side in this embodiment, and pushing them in.

[0034] The locking member 15 is made of an insulating resin material. This allows for a lighter weight than locking member 15 made of a metal material, and also prevents adverse electrical effects if the locking member 15 is dropped and lost inside a device. The locking member 15 is made of, for example, nylon resin.

[0035] Linear recesses 132, 142 are formed along the longitudinal direction on the joining surfaces of the joining flanges 13, 14 of the first cover body 10A. Linear protrusions 133, 143 are formed on the joining surfaces of the joining flanges 13, 14 of the second cover body 10B in portions that correspond to the recesses 132, 142 of the first cover body 10A.

[0036] Positioning is achieved by fitting the protrusions 133, 143 of the second cover body 10B into the recesses 132, 142 of the first cover body 10A. That is, the concave-convex structure formed by the recesses 132, 142 of the first cover body 10A and the protrusions 133, 143 of the second cover body 10B functions as a positioning portion when assembling the protective cover 10.

[0037] In the cover bodies 10A and 10B, a recess 132 may be formed on the joining surface of one joining flange portion 13, and a protrusion 143 may be formed on the joining surface of the other joining flange portion 14. The cover bodies 10A and 10B are arranged so that the recess 132 corresponds to the protrusion 143. In this case, the first cover body 10A and the second cover body 10B have the same structure, which improves productivity.

[0038] Although not shown in the drawings, a caulking material 17 (also called a sealing material) made of, for example, a silicone resin material is disposed between the joining flange portions 13, 14 of the first cover body 10A and the joining flange portions 13, 14 of the second cover body 10B. Specifically, the caulking material 17 is applied to the recesses 132, 142 of the first cover body 10A. That is, the recesses 132, 142 of the first cover body 10A function as positioning portions and also as caulking material application portions to which the caulking material 17 is applied.

[0039] 5, which does not show the overall lengths of the recesses 132, 142 of the first cover body 10A, illustrates a state in which the caulking material 17 has been applied to the protrusions 133, 143 of the second cover body 10B for convenience, but since the caulking material 17 only needs to be provided on the joint surfaces between the recesses 132, 142 of the first cover body 10A and the protrusions 133, 143 of the second cover body 10B, the caulking material 17 may also be applied to the protrusions 133, 143 of the second cover body 10B as shown in FIG. 5. However, as will be described later, from the viewpoint of preventing the caulking material 17 from leaking out to the surroundings when the protective cover 10 is assembled, it is preferable to apply the caulking material 17 to the recesses 132, 142 of the first cover body 10A.

[0040] Additionally, caulking material 18 is disposed between connection port cover portion 12 of cover bodies 10A, 10B and cable protection fittings 21A, 21B. Specifically, two annular protrusions 121, 122 are formed along the circumferential direction on the inner peripheral surface of connection port cover portion 12. Caulking material 18 is applied to space 123 sandwiched between two protrusions 121, 122. In other words, space 123 functions as a caulking material application portion where caulking material 18 is applied.

[0041] By interposing caulking material 17 between the joint surfaces of cover bodies 10A and 10B and by interposing caulking material 18 between connection port cover portion 12 and cable protection fittings 21A and 21B, the inside of protective cover 10 is kept watertight.

[0042] Furthermore, by applying the caulking materials 17 and 18 to the recesses 132 and 142 and the space 123 that function as caulking material application portions, it is possible to prevent the applied caulking material 18 from leaking out to the surroundings when the protective cover 10 is assembled.

[0043] Separation cutouts 134, 144 are formed in the joining surfaces of the joining flanges 13, 14 of the cover bodies 10A, 10B. The cutouts 134, 144 have a shape that allows a separation tool, such as a flathead screwdriver, to be inserted when the joining flanges 13, 14 of the cover bodies 10A, 10B are brought into contact with each other. The cutouts 134, 144 formed in the joining flanges 13, 14 of the first cover body 10A and the cutouts 134, 144 formed in the joining flanges 13, 14 of the second cover body 10B are formed at the same position in the longitudinal direction. In the embodiment, the cutouts 134, 144 are formed in a square shape when viewed from above and a rectangular shape with a long horizontal direction when viewed from the side. However, the shape of the cutouts 134, 144 is not particularly limited as long as the separation tool can be inserted to separate the cover bodies 10A, 10B.

[0044] The notches 134, 144 may be formed in at least one of the joining flanges 13, 14 of the first cover body 10A and the joining flanges 13, 14 of the second cover body 10B.

[0045] The cover bodies 10A, 10B have a plurality of reinforcing ribs 16 (a total of 20 in this embodiment) at the connection portions between the cover main body 11 and the joining flanges 13, 14. The reinforcing ribs 16 are arranged spaced apart in the longitudinal direction and are formed, for example, in the shape of a flat plate so as to straddle from the cover main body 11 to the joining flanges 13, 14. In this embodiment, the reinforcing ribs 16 are formed in the shape of a substantially triangular flat plate. The reinforcing ribs 16 reinforce the mechanical strength of the brim-shaped joining flanges 13, 14.

[0046] Furthermore, when the cover bodies 10A and 10B are joined together, the length L1 of the connection port cover portion 12 in the first direction is smaller than the length L2 in the second direction perpendicular to the first direction (see FIG. 7 ). That is, the protective cover 10 has an oval (elliptical) shape when viewed from the front. By forming the protective cover 10 in an oval shape, the length of the portion of the protective cover 10 where the joining flange portions 13 and 14 are provided can be set shorter when viewed from the front compared to when the protective cover 10 is formed as a circle when viewed from the front, and an increase in the size of the protective cover 10 due to the provision of the joining flange portions 13 and 14 is suppressed. As a result, when the protective cover 10 is attached to the outer periphery of the inter-panel busbar 30 so that the joining flange portions 13 and 14 are substantially horizontal, the inter-panel busbar connection portion 1 can be formed so that the protective covers 10 do not interfere with the protective covers 10 of the inter-panel busbar 30 formed in the adjacent phase of a three-phase arrangement.

[0047] As described above, the protective cover 10 and the inter-panel busbar connection portion 1 according to the embodiment have the following features either alone or in appropriate combination.

[0048] That is, protective cover 10 is a protective cover for an inter-panel busbar that electrically connects bushings 22A, 22B provided in a C-GIS (electric power equipment), and includes first and second cover bodies 10A, 10B that constitute a two-part structure, and a locking member 15 that locks first and second cover bodies 10A, 10B. First and second cover bodies 10A, 10B each have a semi-cylindrical cover main body 11 extending longitudinally, connection port cover portions 12 that are provided at both longitudinal ends of cover main body 11 and attached to cable protection fittings 21A, 21B fixed to bushings 22A, 22B, and joining flange portions 13, 14 that are connected to cover main body 11 and connection port cover portion 12 so as to extend longitudinally and protrude in a first direction perpendicular to the longitudinal direction. The first cover body 10A and the second cover body 10B are joined by a locking member 15 in a state where the joining flange portions 13, 14 of the first cover body 10A and the second cover body 10B are in contact with each other. The outer periphery of the inter-panel busbar is protected by a simple assembly operation of the protective cover 10, so that the inter-panel busbar connection part 1 can be constructed with stable quality regardless of the skill level of the worker, and in a shorter time than when a conventional anticorrosion layer is formed.

[0049] When the first cover body 10A and the second cover body 10B are joined together, the length L1 of the connection port cover portion 12 in the first direction is smaller than the length L2 in the second direction perpendicular to the first direction. This prevents the protective cover 10 from becoming larger due to the provision of the joining flange portions 13, 14. Therefore, when multiple inter-panel busbar connections 1 are arranged side by side corresponding to the respective phases of the power cables, the adjacent inter-panel busbar connections 1 can be placed closer to each other, thereby achieving a smaller size.

[0050] Caulking material 18 is interposed between the joining flanges 13, 14 of the first cover body 10A and the second cover body 10B, and between the connection port cover 12 and the cable protection fittings 21A, 21B. This keeps the inside of the protective cover 10 watertight.

[0051] The connection port cover portion 12 has a caulking material application portion 123 formed along the circumferential direction on the inner peripheral surface, on which the caulking material 18 is applied. This prevents the applied caulking material 18 from leaking out to the surrounding area when the protective cover 10 is assembled, ensuring the formation of a watertight structure.

[0052] The joining flange portions 13, 14 have separation cutout portions 134, 144 on the joining surfaces. This allows the protective cover 10 to be easily disassembled by inserting a separation jig into the cutout portions 134, 144.

[0053] The joining flanges 13, 14 have positioning recesses 132, 142 and protrusions 133, 143 (convex-concave structure) on their joining surfaces, which makes it easy to position the cover bodies 10A, 10B and assemble the protective cover 10 even in a small working space.

[0054] The first cover body 10A and the second cover body 10B have a plurality of reinforcing ribs 16 arranged at intervals in the longitudinal direction at the connection portions between the cover main body 11 and the joining flanges 13, 14. This makes it possible to prevent the joining flanges 13, 14 from being damaged by the force applied when the locking member 15 is press-fitted.

[0055] The first cover body 10A and the second cover body 10B have the same shape, which improves the productivity of the protective cover 10 and reduces the manufacturing cost.

[0056] The first cover body 10A and the second cover body 10B are made of an insulating material, which makes them lighter than when made of a metal material and simplifies assembly.

[0057] The locking member 15 is a push rivet that penetrates and locks the joining flange portions 13, 14 of the first cover body 10A and the joining flange portions 13, 14 of the second cover body 10B. This makes it possible to easily join the cover bodies 10A and 10B and assemble the protective cover 10 simply by pushing in the locking member 15.

[0058] The invention made by the inventor has been specifically described above based on an embodiment, but the present invention is not limited to the above embodiment and can be modified within the scope of the gist thereof.

[0059] For example, in the embodiment, a push rivet is used as the locking member 15, but known fastening members such as a bolt and nut may also be used as the locking member 15.

[0060] In addition, in the embodiment, the protective cover 10 is provided so that the joining flange portions 13, 14 are inclined relative to the installation surface of the housing C, but the protective cover 10 may also be provided so that the joining flange portions 13, 14 are parallel to the installation surface.

[0061] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0062] 1 Inter-panel busbar connection 10 Protective cover 10A First cover body 10B Second cover body 11 Cover body 12 Connection port cover 13, 14 Joint flange 15 Locking member 16 Reinforcing rib 17, 18 Caulking material 21A, 21B Cable protection fittings 22A, 22B bushings 30 Inter-panel busbar

Claims

1. A protective cover for an inter-panel busbar that electrically connects bushings provided in power equipment, a first cover body and a second cover body that constitute a two-part structure; a locking member that locks the first cover body and the second cover body, The first cover body and the second cover body each include: a semi-cylindrical cover body portion extending in the longitudinal direction; a connection port cover portion provided at each end of the cover body portion in the longitudinal direction and attached to an outer periphery of a cable protection fitting fixed to the bushing; a joint flange portion that is connected to the cover body portion and / or the connection port cover portion so as to extend in the longitudinal direction and that protrudes in a first direction perpendicular to the longitudinal direction, the joining flange portion of the first cover body and the joining flange portion of the second cover body are joined by the locking member in a state in which they are in contact with each other, The joining flange portion has a positioning uneven structure on the joining surface, The uneven structure is a linear recess formed along a longitudinal direction on either the joining flange portion of the first cover body or the joining flange portion of the second cover body; a linear convex portion formed along a longitudinal direction on the other of the joining flange portion of the first cover body and the joining flange portion of the second cover body, A caulking material is interposed between the recess and the protrusion. Protective cover.

2. the first cover body and the second cover body each have, as the joining flange portion, a first joining flange portion and a second joining flange portion that protrudes in an opposite direction to the first joining flange portion in the first direction, the first joining flange portion of the first cover body and the first joining flange portion of the second cover body face each other and have the uneven structure on their joining surfaces, the second joining flange portion of the first cover body and the second joining flange portion of the second cover body face each other and have the uneven structure on their joining surfaces; The protective cover of claim 1 .

3. the first joining flange portion and the second joining flange portion of the first cover body both have the recessed portion, The first joining flange portion and the second joining flange portion of the second cover body both have the convex portion. The protective cover of claim 2.

4. the first joining flange portion of the first cover body has the recessed portion, and the second joining flange portion has the protruding portion, The first joining flange portion of the second cover body has the convex portion, and the second joining flange portion has the concave portion. The protective cover of claim 2.

5. The cable protection fittings fixed to the bushings each have a large diameter portion and a small diameter portion, one of the connection port covers is fitted onto an outer circumferential surface of the small diameter portion of one of the cable protection fittings, The other connection port cover is fitted onto the outer circumferential surface of the small diameter portion of the other cable protection fitting. The protective cover of claim 1 .

6. When the first cover body and the second cover body are joined together, the length of the connection port cover portion in the first direction is smaller than the length of the connection port cover portion in the longitudinal direction and in a second direction perpendicular to the first direction. The protective cover of claim 1 .

7. A caulking material is interposed between the connection port cover portion and the cable protection fitting. The protective cover according to claim 1 or 2.

8. The connection port cover portion has a caulking material application portion formed along the circumferential direction on the inner peripheral surface and on which the caulking material is placed. The protective cover of claim 4.

9. The joining flange portion has a separation notch portion on the joining surface, The protective cover according to claim 1 or 2.

10. The first cover body and the second cover body have a plurality of reinforcing ribs arranged at a distance in the longitudinal direction at the connection portion between the cover main body portion and the joining flange portion. The protective cover according to claim 1 or 2.

11. The first cover body and the second cover body have the same shape. The protective cover according to claim 1 or 2.

12. The first cover body and the second cover body are formed of an insulating material. The protective cover according to claim 1 or 2.

13. The locking member is a push rivet that penetrates and locks the joining flange portion of the first cover body and the joining flange portion of the second cover body. The protective cover according to claim 1 or 2.

14. An inter-panel busbar connection that electrically connects bushings of power equipment, Inter-panel busbars and a cable protection fitting fixed to the bushing; a protective cover provided on an outer periphery of the inter-panel busbar, The protective cover is a first cover body and a second cover body that constitute a two-part structure; a locking member that locks the first cover body and the second cover body, The first cover body and the second cover body each include: a semi-cylindrical cover body portion extending in the longitudinal direction; a connection port cover provided at each end of the cover body in the longitudinal direction and attached to the outer periphery of the cable protection fitting; a joint flange portion that is connected to the cover body portion and / or the connection port cover portion so as to extend in the longitudinal direction and that protrudes in a first direction perpendicular to the longitudinal direction, the joining flange portion of the first cover body and the joining flange portion of the second cover body are joined by the locking member in a state in which they are in contact with each other, The joining flange portion has a positioning uneven structure on the joining surface, The uneven structure is a linear recess formed along a longitudinal direction on either the joining flange portion of the first cover body or the joining flange portion of the second cover body; a linear convex portion formed along a longitudinal direction on the other of the joining flange portion of the first cover body and the joining flange portion of the second cover body, A caulking material is interposed between the recess and the protrusion. Inter-panel busbar connection.

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