CN210898490U - A high-voltage cable grounding box - Google Patents

Abstract

The utility model provides a high-voltage cable grounding box. A high-voltage cable grounding box includes a box body and a wiring assembly arranged in the box body, the box body includes an openable box door provided on a side wall of the box body, and a rotating component is connected to the outer wall of the box body. The rotating assembly includes a connecting frame and a fixing block for fixing on the ground, one end of the connecting frame is fixedly connected to the outer wall of the box body, and the other end is rotatably connected to the fixing block. In the utility model, the wiring components are placed in a box, and the box is buried in the ground, which can be conveniently hidden and has the function of waterproof and anti-theft;

Description

A high-voltage cable grounding box

technical field

The utility model relates to the field of electric power technology, and more particularly, to a grounding box for high-voltage cables.

Background technique

Direct grounding is one of the grounding methods for the metal shielding layer (or metal sheathing) of large-section high-voltage single-core power cables with voltage levels of 110kV and above. In case of short-circuit fault current, it can suppress high impulse overvoltage on the metal shielding layer of the cable, and avoid the overvoltage breaking through the insulation of the cable sheathing and causing the multi-point grounding fault of the metal shielding layer of the cable. When the cable runs normally, it can also limit the metal shielding of the cable. The induced overvoltage on the layer can avoid the formation of circulating current in the metal shield of the cable, and can also prevent personnel from being injured by electric shock, ensure the normal operation of the power cable, and prolong the service life of the cable.

At present, there are two types of grounding boxes for high-voltage cable grounding wires: one is the buried high-voltage cable grounding wire grounding box. During testing and maintenance, it is necessary to open the cover of the joint well to expose the grounding box of the high-voltage cable grounding wire. If the size of the cover is large, lifting the cover requires multiple people to operate, which is labor-intensive and time-consuming; the other is the grounding of the ground vertical high-voltage cable grounding wire. This kind of high-voltage cable grounding box is installed on the ground near the cover plate of the joint well. It has convenient pre-test and maintenance functions, but the waterproof and anti-theft functions are general, and the whole may not be friendly to the surrounding environment.

At present, there is no grounding box that can meet the functions of waterproof and anti-theft at the same time, and can also facilitate the needs of pre-test and maintenance.

Utility model content

The utility model provides a high-voltage cable grounding box in order to overcome the problems mentioned in the above-mentioned background technology that the requirements of waterproof and anti-theft cannot be met at the same time, and the functions of convenient pre-test and maintenance are provided. In the utility model, the wiring components are placed in a box, and the box is buried in the ground, which can be conveniently hidden and has the function of waterproof and anti-theft;

In order to solve the above technical problems, the technical scheme adopted by the present invention is: a high-voltage cable grounding box, comprising a box body and a wiring assembly arranged in the box body, the box body including an openable openable The box door, the outer wall of the box body is connected with a rotating assembly, the rotating assembly includes a connecting frame and a fixing block, one end of the connecting frame is fixedly connected to the outer wall of the box body, and the other end is connected to the said box through a rotating shaft. The fixed block is rotatably connected, and the rotating shaft is parallel to the plane where the fixed block is located. In this way, the box body is a cubic structure, one side wall is set as a box door that can be rotated to open the box body, and a wiring assembly is arranged inside the box body for connecting the high-voltage cable and making it grounded. The side wall, except the side of the box door is connected to the rotating assembly, the rotating assembly is fixedly connected with the box body through the connecting frame, the fixed block of the rotating assembly is fixed under the ground, and the connecting frame of the rotating assembly can take the box body around the The fixed block rotates; then, when installing, first dig a pit under the ground where the box and rotating components can be buried, fix the fixed block at the bottom of the hole, and connect the wiring components, then place the box in the pit. Inside, the grounding box is hidden without affecting the city appearance; when maintenance is required, the box body can be pulled up, and the box body is turned to the ground by rotating the rotating assembly, so that the box door can be opened on the ground. Pre-test and overhaul have been carried out; after the overhaul is completed, put the box back into the pit and bury it. The wiring components are placed in the box, and the box is buried in the ground, which can be easily hidden and has the function of waterproof and anti-theft; the box body connection components can facilitate the maintenance of the box by turning the box above the ground for maintenance.

Further, the wiring assembly includes a connecting pipe, a connecting terminal, a grounding terminal and a conductive connecting plate, the connecting terminal is provided with a mounting hole for connecting the cable core, and the connecting pipe is fixedly penetrated through the box body. On the bottom surface, the connecting terminal and the grounding terminal are arranged on the inner side wall of the opposite side of the box body and the box door, and the connecting terminal is connected one-to-one with the grounding terminal through the conductive connecting plate . In this way, the connecting pipe is placed on the bottom surface, the cable is passed through the connecting pipe into the inside of the box, the core of the cable is connected to the mounting hole of the terminal, the terminal is connected to the grounding terminal through the conductive connecting plate, and the grounding terminal is connected by the wire Ground through another connection tube; each terminal is connected to a ground terminal.

Further, the number of the connecting tubes is 4, the number of the wiring terminals is 3, the number of the grounding terminals is 4, the number of the conductive connection plates is 3, and at least two of the The conductive connecting plates are arranged to cross each other. In this way, the number of terminals is three, which is just matched to the three cables of the three-phase high-voltage cable. Each of the three cables is connected to a terminal through a connecting tube, and the three terminals are connected to the three grounding terminals in one-to-one correspondence. The grounding terminals are connected to each other, and the extra grounding terminal leads out a grounding wire through the remaining connecting pipe to ground the entire three-phase high-voltage cable; It can reduce the induced voltage and protect the safety of electricity consumption.

Further, the four grounding terminals are jointly arranged on a conductive grounding connection plate. In this way, the four ground terminals are connected in common, and only one ground wire needs to be drawn from one of the ground terminals to complete the grounding of all the ground terminals.

Further, a lightning arrester is sleeved on the grounding terminal. In this way, the arrester is also called a protector, which can show high resistance at low voltage and low resistance at high voltage; so that when the entire cable leaks, it can be grounded quickly to ensure electrical safety.

Further, the connecting frame includes a first connecting plate and a second connecting plate, one end of the first connecting plate is fixedly attached to the side outer wall adjacent to the box body and the box door, and the second connecting plate is attached. One end of the plate is connected to the outer wall of the bottom surface of the box body, and the other end is connected to the end of the first connecting plate close to the fixing block. In this way, the first connecting plate, the second connecting plate and the bottom surface of the box form a structure similar to a triangle, and the triangle has stability, so that the rotating assembly can be more stable in force when rotating with the box, and is not easy to break.

Further, the connecting pipe is a cylindrical structure, one end of the connecting pipe is located inside the box body, the other end is located outside the box body, and one end of the connecting pipe located outside the box body is provided with a waterproof connector . In this way, the connecting pipe is fixed on the side wall of the box, connecting the inside and outside of the box. Generally, the height of the connecting pipe is similar to the height of the terminal, which is more convenient for the connection of cables or grounding wires. There may be gaps after connecting the pipes. Here, the waterproof connector is generally a deformable rubber material. The function of the waterproof connector is to seal the gap to make the waterproof effect better.

Further, the conductive connecting plate is a telescopic connecting plate. In this way, the same telescopic connecting plate can be applied to the connection between the connection terminal and the grounding terminal at different distances, so as to facilitate the cross-connection between the conductive connecting plates.

Further, a handle is provided on the outer wall of the box body on the opposite side of the first connecting plate. In this way, the handle is on the opposite side of the first connecting plate. When the box is put down, the first connecting plate is attached to the bottom surface of the pit, so the handle is on the side of the box closest to the ground, which is convenient for maintenance. Pull the box and pull the box out of the pre-buried pit.

Further, the box body is made of insulating material. In this way, the cost of the insulating material is lower, the waterproof effect is good, and the stability of placing it underground is also relatively strong; and the insulating material is generally lighter, which can make it easier to pull up the box.

Compared with the prior art, the beneficial effects are:

1. The wiring components are placed in the box, and the box is buried in the ground, which can be easily hidden and has the function of waterproof and anti-theft; the box body connection components can facilitate the maintenance of the box by turning the box above the ground for maintenance.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model when the box door is opened.

FIG. 2 is a schematic structural diagram of the utility model through the box door when it is placed under the ground.

FIG. 3 is a schematic structural diagram of the present invention without the box door when it is turned to the ground.

FIG. 4 is a partial structural schematic diagram of the rotating assembly in the present invention.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable to the artisan that certain well-known structures and descriptions thereof may be omitted from the drawings. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as a limitation on the present patent.

The same or similar symbols in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms "upper", "lower", "left", " The orientation or positional relationship indicated by "right", "long" etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Therefore, the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on this patent. For those of ordinary skill in the art, they can understand according to specific circumstances. The specific meanings of the above terms.

Below by specific embodiment, and in conjunction with accompanying drawing, the technical scheme of the present utility model is further described in detail:

As shown in FIG. 1 , it is a high-voltage cable grounding box, including a box body 1 and a wiring assembly arranged in the box body 1. The box body 1 includes an openable box door 101 (the box door in the figure) provided on its side wall. 101 is in the open state, the following description refers to the relative positional relationship when the box door 101 is closed), the outer wall of the box body 1 is connected with a rotating assembly, and the rotating assembly includes a connecting frame 2 and a fixing block 3 for fixing on the ground, one end of the connecting frame 2 It is fixedly connected to the outer wall of the box body 1 , and the other end is rotatably connected to the fixing block 3 .

In this embodiment, the wiring assembly includes 4 connection tubes 102, 3 connection terminals 103, 4 ground terminals 104 and 3 conductive connection plates 105. The connection terminals 103 are provided with mounting holes for connecting cable cores, and the connection tubes 102 is fixed on the bottom surface of the box body 1, the wiring terminals 103 and the grounding terminal 104 are arranged on the inner side wall of the box body 1 and the box door 101 on the opposite side, and each wiring terminal 103 is connected to a grounding terminal through the conductive connecting plate 105. 104 are connected one-to-one, and at least two conductive connecting plates 105 are arranged to cross each other; four grounding terminals 104 are jointly arranged on a conductive grounding connecting plate 16; the grounding connecting plate 16 is fixed on the inner wall of the back of the box , the ground terminal 104 is sleeved with a lightning arrester 17; the connecting frame 2 includes a first connecting plate 201 and a second connecting plate 202, one end of the first connecting plate 201 is fixedly attached to the outer wall of the side surface of the box body 1 and the box door 101 adjacent , one end of the second connecting plate 202 is connected to the outer wall of the bottom surface of the box 1, and the other end is connected to the end of the first connecting plate 201 close to the fixing block 3; the connecting pipe 102 is a cylindrical structure, and one end of the connecting pipe 102 is located in the box 1 The inside and the other end are located outside the box body 1, and the end of the connecting pipe 102 located outside the box body 1 is provided with a waterproof connector; the conductive connecting plate 105 is a telescopic connecting plate; the outer wall of the box body 1 and the first connecting plate 201 on the opposite side There is a handle on it; the box body 1 is made of insulating material.

In this embodiment, the box body 1 is a cubic structure, and one side of the box body 1 is set as a box door 101 that can be rotated to open the box body 1. A wiring assembly is provided inside the box body 1 for connecting high-voltage cables and grounding them. , in this embodiment, the box door 101 of the box body 1 is taken as the front, and the rotating assembly is connected to the left side and the bottom surface of the box body. , the connecting frame 2 of the rotating assembly can rotate around the fixing block 3 with the box body 1; the connecting pipe 102 is worn on the bottom surface, and the grounding terminal 104 and the connecting terminal 103 are both arranged on the inner wall of the back. When the cable is grounded during installation , the cable penetrates into the box 1 from the connecting tube 102, and the wire core of the cable is connected to the mounting hole of the terminal 103. The terminal 103 is connected to the grounding terminal 104 through the conductive connecting plate 105, and the grounding terminal 104 is re-threaded through the wire Ground through another connecting tube 102; each terminal 103 is connected to a ground terminal 104; the number of terminals 103 is 3, which is just matched to the three cables of the three-phase high-voltage cable, and each of the three cables passes through one The connection tube 102 is connected to one terminal 103, the three terminals 103 are connected to the three ground terminals 104 in one-to-one correspondence, the four ground terminals 104 are connected to each other, and the extra ground terminal 104 leads out The grounding wire passes through the remaining connection pipe 102 to ground the entire three-phase high-voltage cable; the cross-connection between the conductive connection plates 105 can reduce the induced voltage and protect the safety of electricity use; the connection pipe 102 is fixed It is mounted on the side wall of the box body 1 and connects the inside and outside of the box body 1. Generally, the height of the connecting pipe 102 is similar to the height of the terminal 103, which is more convenient for the connection of cables or grounding wires. There may be gaps after 102. Here, the waterproof connector is generally a deformable rubber material. The function of the waterproof connector is to seal the gap to make the waterproof effect better. The first connecting plate 201, the second connecting plate 202 and the bottom surface of the box body 1 form a structure similar to a triangle, and the triangle has stability, which can make the rotating assembly more stable when rotating with the box body 1, and it is not easy to break ; The handle is on the opposite side of the first connecting plate 201, when the box 1 is put down, the first connecting plate 201 is attached to the bottom surface of the pit, so the handle is on the side of the box 1 that is most close to the ground, It is convenient to pull the box during maintenance and pull the box out of the pre-buried pit.

During installation, as shown in Figure 2 and Figure 3, A is the horizon, first dig a pit under the ground that can bury the box 1 and the rotating components, fix the fixing block 3 at the bottom of the pit, and connect all the wiring components. After completion, put the box 1 in the pit to complete the concealment of the grounding box without affecting the city appearance; when the maintenance is required, the box 1 can be pulled up, and the box 1 is turned to the ground by the rotation of the rotating assembly Come up, so that by opening the box door 101 on the ground, pre-test and maintenance can be carried out; after the maintenance is completed, put the box body 1 back into the pit and bury it; put the wiring components in the box, and the box is buried in the ground, It can be easily hidden and has the function of waterproof and anti-theft; the handle is on the opposite side of the first connecting plate 201. When the box body 1 is put down, the first connecting plate 201 is attached to the bottom surface of the pit, so the handle is on the box. The side of the body 1 that is closest to the ground is convenient for pulling the box during maintenance, and the box body 1 is connected to the rotating assembly, which can facilitate the maintenance of the box by turning the box above the ground during maintenance.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims (10)

1. A high-voltage cable grounding box, comprising a box body and a wiring assembly arranged in the box body, the box body comprising an openable box door provided on its side wall, characterized in that: the outer wall of the box body A rotating assembly is connected. The rotating assembly includes a connecting frame and a fixing block. One end of the connecting frame is fixedly connected to the outer wall of the box body, and the other end is rotatably connected to the fixing block through a rotating shaft. parallel to the plane where the fixed block is located. 2 . The high-voltage cable grounding box according to claim 1 , wherein the wiring assembly comprises a connecting pipe, a wiring terminal, a grounding terminal and a conductive connecting plate, and the wiring terminal is provided with a mounting for connecting the cable cores. 3 . The connecting pipe is fixedly penetrated on the bottom surface of the box body, the connecting terminal and the grounding terminal are arranged on the inner side wall of the opposite side of the box body and the box door, and the connecting terminal One-to-one connection with the ground terminal through the conductive connecting plate. 3. The high-voltage cable grounding box according to claim 2, wherein the number of the connecting pipes is 4, the number of the connection terminals is 3, the number of the grounding terminals is 4, the number of the The number of the conductive connecting plates is 3, and at least two of the conductive connecting plates are arranged to cross each other. 4 . The high-voltage cable grounding box according to claim 3 , wherein the four grounding terminals are jointly arranged on a conductive grounding connection plate. 5 . 5 . The high-voltage cable grounding box according to claim 3 , wherein a lightning arrester is sleeved on the grounding terminal. 6 . 6. The high-voltage cable grounding box according to claim 2, wherein the connecting frame comprises a first connecting plate and a second connecting plate, and one end of the first connecting plate is fixedly attached to the box and the On the side outer wall adjacent to the box door, one end of the second connecting plate is connected to the outer wall of the bottom surface of the box body, and the other end is connected to the end of the first connecting plate close to the fixing block. 7 . The high-voltage cable grounding box according to claim 2 , wherein the connecting pipe has a cylindrical structure, one end of the connecting pipe is located inside the box body, and the other end is located outside the box body, and the One end of the connecting pipe located outside the box body is provided with a waterproof connector. 8 . The high-voltage cable grounding box according to claim 2 , wherein the conductive connecting plate is a telescopic connecting plate. 9 . 9 . The high-voltage cable grounding box according to claim 6 , wherein a handle is provided on the outer wall on the opposite side of the box body and the first connecting plate. 10 . 10 . The high-voltage cable grounding box according to claim 1 , wherein the box body is made of insulating material. 11 .

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