CN210898406U - Grounding box for grounding wire of high-voltage cable - Google Patents

Abstract

The utility model provides a high tension cable earth connection grounding box. The utility model provides a high tension cable earth connection ground connection case, includes box, binding post, ground terminal, connecting pipe and electrically conductive connecting piece, the box is including turning over the top cap that opens, ground terminal establishes on the inner wall of top cap, the connecting pipe is worn to establish on the lateral wall of box, binding post fixes on the box with on the inside wall that the connecting pipe is relative, binding post passes through electrically conductive connecting piece connects ground terminal, electrically conductive connecting piece's structure satisfies when the top cap is opened and is closed, electrically conductive connecting piece's both ends respectively with binding post and ground terminal remain to be connected throughout. The utility model discloses realize whole hiding, both had waterproof, theftproof function, can conveniently open again, be convenient for pretest, overhaul, simple structure, convenient to use.

Description

A high-voltage cable ground wire grounding box

technical field

The utility model relates to the technical field of electric power, and more particularly, to a grounding box of a high-voltage cable grounding wire.

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.

Utility model content

The utility model provides a high-voltage cable grounding wire grounding box in order to overcome the problems described in the above-mentioned background art that it cannot be convenient for pre-testing and maintenance at the same time, and can have waterproof and anti-theft functions. The utility model realizes overall concealment, has waterproof and anti-theft functions, is convenient to open, facilitates pre-testing and maintenance, has a simple structure and is convenient to use.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a grounding box for the grounding wire of a high-voltage cable, further comprising a terminal, a grounding terminal, a connecting pipe and a conductive connector, and the box body includes a top that can be folded open. cover, the grounding terminal is arranged on the inner wall of the top cover, the connecting pipe is penetrated on the side wall of the box body, and the connecting terminal is fixed on the box body opposite to the connecting pipe On the inner side wall, the connection terminal is connected to the ground terminal through the conductive connection piece, and the structure of the conductive connection piece satisfies that when the top cover is opened and closed, the two ends of the conductive connection piece are respectively connected with the connection terminal and the ground terminal. The ground terminal remains connected at all times. In this way, the entire grounding device is hidden in the box. The box is generally buried under the ground and has the functions of waterproof and anti-theft. During installation, the cable and the grounding wire pass through the connecting tube respectively, and the cores of the cable and the grounding wire are connected to the terminal respectively. On the other hand, the connecting terminal and the grounding terminal are conductively connected through a conductive connector. The cable is routed to one end of the grounding terminal, each grounding terminal is electrically connected side by side, and the grounding wire is connected to the grounding terminal after connecting the connecting terminal. Realize the short-circuit grounding of the cable; when the whole device needs to be pre-tested or repaired, open the top cover, because the conductive connector is a movable connector and will not change the position of the wiring terminal and the grounding terminal. The conductive connector is opened after the box is opened. The first exposed one can directly test the conductive connectors during pre-test and maintenance, which makes pre-test and maintenance more convenient.

As a preferred solution, the conductive connecting piece includes a first connecting plate and a second connecting plate, the first connecting plate is hinged with the second connecting plate, and the first connecting plate is hinged with the connection terminal, The second connection plate is hinged with the ground terminal. In this way, the conductive connection point is hinged connection, which is more labor-saving and convenient when opening or closing the box.

As another preferred solution, the conductive connector is a conductive spring, one end of the conductive spring is connected to the connection terminal, and the other end of the conductive spring is connected to the ground terminal. In this way, the spring can be elastically deformed, and when the top cover of the box is opened, the connection relationship of the terminals will not be changed, and electricity is always conducted.

As another preferred solution, the conductive connecting member is a telescopic connecting rod, one end of the telescopic connecting rod is hinged with the connection terminal, and the other end is hinged with the ground terminal. In this way, the telescopic connecting rod can be elongated when the top cover is opened, and can be retracted when the top cover is closed, so that when the top cover is opened and closed, the two ends of the conductive connecting piece are connected to the wiring terminal and the grounding terminal respectively. Always stay connected.

Further, the number of the wiring terminals, the grounding terminals, the connecting tubes and the conductive connecting pieces are all four, and the wiring terminals and the grounding terminals are connected in a one-to-one correspondence through the conductive connecting pieces; The connection terminal is provided with a mounting hole for connecting the cable core. In this way, because the general high-voltage cable is divided into three phases: A, B, C three-phase, the aperture of the connecting pipe is set to be slightly larger than the outer diameter of the cable, and each cable of the three-phase cable is penetrated through a connecting pipe, and then Peel off the insulation layer of the cable and use the wire core to connect the terminals, then the three-phase cable is connected to one end of the ground terminal. Since the ground terminals are conductively connected, generally a wire connection board is used to connect the four terminals. Connected together; and a grounding wire is inserted into the remaining connecting tube, the core of the grounding wire is connected to the terminal, the grounding wire is also connected to one end of the grounding terminal, and the grounding wire has been grounded outside the box, In this way, the grounding protection of the three-phase cable is realized.

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.

As a preferred solution, the box body is made of stainless steel, the top cover includes a first insulating plate, the first insulating plate is arranged on the inner wall of the box body, and the grounding terminal is arranged on the a first insulating plate; a second insulating plate is arranged on the inner side wall of the box away from the connecting pipe, and the connecting terminal is arranged on the second insulating plate. In this way, the stability of the stainless steel material is stronger, and the waterproof effect is also very good. During production, insulating plates are added at the positions of the wiring terminals and the grounding terminals, so that the line is separated from the box body, but the ground wire can be connected to the box body. , directly grounded through the box.

As another preferred solution, the box body is made of insulating material. In this way, the cost of insulating materials is lower, the waterproof effect is also good, and the stability of placing them in the ground is also relatively strong.

Further, the outer wall of the top cover is provided with a handle, and the outer wall of the handle is provided with anti-slip threads. In this way, the handle is convenient to open the box body, perform work operations, and improve work efficiency, and the outer wall of the handle is provided with anti-slip threads, which can make the force more stable during use.

Compared with the prior art, the beneficial effects are:

1. The entire grounding device is hidden in the box. The box is generally buried under the ground and has the functions of waterproof and anti-theft. The grounding box of the high-voltage cable grounding wire is easy to open. The conductive connector is the first exposed after opening the box. Pre-test and maintenance It is enough to directly test the conductive connector when it is needed, which makes the pre-test and maintenance more convenient.

2. Set the number of wiring terminals, grounding terminals, connecting tubes and conductive connectors to 4, which is just suitable for the grounding protection of the existing three-phase high-voltage cable line, and is more convenient to use.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic structural diagram of the position of the top cover in the present invention.

Fig. 3 is a bird's-eye structural schematic diagram of the interior of the present invention after the top cover is opened.

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" and "short" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element. It must have a specific orientation, be constructed and operated in a specific orientation, so 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. Understand the specific meanings of the above terms under specific circumstances.

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

Example 1

This embodiment provides a high-voltage cable grounding wire grounding box, as shown in FIGS. 1 to 3 , which is a high-voltage cable grounding wire grounding box, including a box body 1, the box body 1 includes a foldable top cover 2, and also It includes 4 connecting terminals 3, 4 grounding terminals 4, 4 connecting pipes 7 and 4 conductive connectors. The grounding terminals 4 are arranged side by side on the inner wall of the top cover 2, and the connecting pipes 7 are arranged side by side on the side of the box body 1. On the wall, the connecting terminals 3 are fixed side by side on the inner side wall of the box 1 away from the connecting pipe 7, and the conductive connecting piece is a movable connecting piece. 4 conductive connections between. The conductive connector includes a first connecting plate 6 and a second connecting plate 5, the first connecting plate 6 is hinged with the second connecting plate 5, the first connecting plate 6 is hinged with the terminal 3, and the second connecting plate 5 is hinged with the ground terminal 4 The terminal 3 is provided with a mounting hole for connecting the cable core; the connecting pipe 7 is a cylindrical structure, one end of the connecting pipe 7 is located inside the box 1, the other end is located outside the box 1, and the connecting pipe 7 is located outside the box 1 One end is provided with a waterproof connector. The box body 1 is made of stainless steel, the top cover 2 includes a first insulating plate 21, the first insulating plate 21 is arranged on the inner wall of the box body 1, and the ground terminal 4 is arranged on the first insulating plate 21; the box body 1 is far away from the connection The inner side wall of the tube 7 is provided with a second insulating plate 32 , and the connecting terminal 3 is provided on the second insulating plate 32 . A handle 22 is provided on the outer wall of the top cover 2 .

When installing, open the top cover 2, because the general high-voltage cable is divided into three phases: A, B, C three-phase, the aperture of the connecting pipe 7 is set to be slightly larger than the outer diameter of the cable, and each cable of the three-phase cable is set. Each of them is penetrated through a connecting tube 7, and then the insulation layer of the cable is peeled off, and the wire core is used to connect the terminal 3, and the three-phase cable is connected to one end of the ground terminal 4. Since the ground terminals 4 are conductively connected, Generally, the four terminals 3 are connected together through a wire connecting plate; a grounding wire is inserted into the remaining connecting tube 7, the core of the grounding wire is connected to the terminal 3, and the grounding wire is also connected. It leads to one end of the grounding terminal 4, and the grounding wire has been grounded outside the box, thus realizing the grounding protection of the three-phase cable.

When the whole device needs to be pre-tested or overhauled, open the top cover 2, because the conductive connector is a hinged movable connector and will not change the position of the terminal 3 and the ground terminal 4. The conductive connector is the first one after opening the box. When exposed, the conductive connector can be directly tested during pre-test and maintenance, which makes pre-test and maintenance more convenient.

Example 2

This embodiment is similar to Embodiment 1, except that the conductive connecting member is a conductive spring, one end of the conductive spring is connected to the connecting terminal 3 and the other end is connected to the grounding terminal 4 . In this way, the spring can be elastically deformed, and when the top cover of the box is opened, the connection relationship of the terminals will not be changed, and electricity is always conducted.

Example 3

This embodiment is similar to Embodiment 1, except that the conductive connecting member is a telescopic connecting rod. One end of the telescopic connecting rod is hinged with the connecting terminal 3 and the other end is hinged with the grounding terminal 4. The connecting rod can be elongated when the top cover is opened, and can be retracted when the top cover is closed, so that when the top cover is opened and closed, the two ends of the conductive connector are always connected to the wiring terminal and the grounding terminal respectively. .

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. The utility model provides a high tension cable earth connection grounding box, includes the box, its characterized in that: still include binding post, ground terminal, connecting pipe and electrically conductive connecting piece, the box is including turning over the top cap of opening, ground terminal establishes on the inner wall of top cap, the connecting pipe is worn to establish on the lateral wall of box, binding post fixes on the box with on the relative inside wall of connecting pipe, binding post passes through electrically conductive connecting piece connects ground terminal, electrically conductive connecting piece's structure satisfies when the top cap is opened and is closed, electrically conductive connecting piece's both ends respectively with binding post and ground terminal remain connected throughout.

2. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the conductive connecting piece comprises a first connecting plate and a second connecting plate, one end of the first connecting plate is hinged to one end of the second connecting plate, the other end of the first connecting plate is hinged to the wiring terminal, and the other end of the second connecting plate is hinged to the grounding terminal.

3. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the conductive connecting piece is a conductive spring, one end of the conductive spring is connected with the wiring terminal, and the other end of the conductive spring is connected with the grounding terminal.

4. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the conductive connecting piece is a telescopic connecting rod, one end of the telescopic connecting rod is hinged to the wiring terminal, and the other end of the telescopic connecting rod is hinged to the grounding terminal.

5. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the number of the wiring terminals, the number of the grounding terminals, the number of the connecting pipes and the number of the conductive connecting pieces are 4, and the wiring terminals are correspondingly connected with the grounding terminals one by one through the conductive connecting pieces; the grounding terminals are in conductive connection, and the wiring terminals are provided with mounting holes for connecting cable cores.

6. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the connecting pipe is of a cylindrical structure, one end of the connecting pipe is located inside the box body, the other end of the connecting pipe is located outside the box body, and a waterproof connecting piece is arranged at one end, located outside the box body, of the connecting pipe.

7. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the box body is made of insulating materials.

8. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: the box body is made of stainless steel, the top cover comprises a first insulating plate, the first insulating plate is arranged on the inner wall of the box body, and the grounding terminal is arranged on the first insulating plate; the box body is far away from be equipped with the second insulation board on the inside wall of connecting pipe, binding post establishes on the second insulation board.

9. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 1, wherein: and a handle is arranged on the outer wall of the top cover.

10. The grounding box of the grounding wire of the high-voltage cable as claimed in claim 9, wherein: and the outer wall of the handle is provided with anti-skid threads.

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