Low-voltage multifunctional quick access connection box

Abstract

The invention provides a low-voltage multifunctional quick access connection box. The low-voltage multifunctional quick access connection box comprises a box body and a box door, the box body is of a semi-closed surrounding structure, an opening of the box body is located in one side wall, and an insulating back plate is fixed to the other side wall. A three-phase four-wire disconnecting link, a quick connection assembly and a transverse insulating support plate are arranged on the insulating back plate; one end of the three-phase four-wire knife switch is connected to a low-voltage line, and the other end is connected to the four quick connection assemblies. The four quick connection assemblies are longitudinally fixed on the transverse insulation supporting plate at intervals, and each quick connection assembly comprises a connection busbar, a conductive connector and / or a conductive terminal; the connecting busbar is fixed with the transverse insulating support plate through the fixing hole and then is electrically connected with the three-phase four-wire knife switch through the conductive hole; the box door is rotationally mounted at the opening of the box body for shielding or exposing; the low-voltage line power supply can be quickly conducted or cut off only by connecting the cable lug of the generator car to the conductive terminal or connecting the cable quick-plug connector to the conductive connector and controlling the three-phase four-wire knife switch. According to the invention, the maintenance work efficiency is improved, and the operation complexity and the safety risk are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power, and particularly to a low-voltage multi-functional quick access connection box. Background Art

[0002] In the power system, the emergency repair and maintenance of low-voltage lines are one of the key links to ensure their stability and reliable power supply. Since low-voltage lines are distributed in every area of the power system, it is often necessary to respond quickly and repair them when a fault occurs. In particular, when an emergency occurs, emergency repair personnel must quickly and effectively connect relevant devices in order to restore normal power supply and reduce the damage to users.

[0003] Currently, in the current emergency repairs, a low-voltage access device with a monotonous structure and limited access paths is often used to connect the power generation vehicle and the low-voltage line. However, this low-voltage access device usually requires multiple other devices to work together, which results in a large amount of time being invested by maintenance personnel in modifying and temporarily accessing the devices, greatly reducing the repair efficiency. In addition, the operation of the existing low-voltage access device working with other devices is too complex, which is not conducive to the safe disconnection and connection of the circuit, increasing the risk to the personal safety of personnel.

[0004] Therefore, it is necessary to propose a new device to be connected between the power generation vehicle and the low-voltage line, which can replace the existing low-voltage access device and the multiple devices working with it, not only meeting the access requirements of multiple scenarios, but also improving the repair work efficiency and reducing the operation complexity and safety risk. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a low-voltage multi-functional quick access connection box, which can replace the existing low-voltage access device and the multiple devices working with it, not only meeting the access requirements of multiple scenarios, but also improving the repair work efficiency and reducing the operation complexity and safety risk.

[0006] To solve the above technical problem, the embodiments of the present invention provide a low-voltage multi-functional quick access connection box for use between a power generation vehicle cable and a low-voltage line, including a box body and a box door; wherein,

[0007] The box body is a semi - enclosed surrounding structure formed by a bottom wall, a top wall, and a plurality of side walls located between the bottom wall and the top wall. Its opening is on one side wall, and an insulating backboard is fixed on the other side wall opposite to the opening. On the side of the insulating backboard facing the opening, there is a three - phase four - wire knife switch, four quick - connection components, and a horizontal insulating support plate. The three - phase four - wire knife switch is fixed on the insulating backboard and is arranged close to the bottom wall. One end of it has four incoming - wire terminals for connecting the ABC phase wires and the neutral wire of the low - voltage line, and the other end has four outgoing - wire terminals for connecting the four quick - connection components. The horizontal insulating support plate is fixed on the insulating backboard and is arranged away from the three - phase four - wire knife switch. The four quick - connection components are fixed on the side of the horizontal insulating support plate facing the opening in a longitudinally spaced - apart distribution manner. Each quick - connection component includes a conductive connecting busbar, a conductive connector arranged thereon for connecting the quick - plug connector of the power - generation vehicle cable, and / or a conductive terminal for connecting the cable lug of the power - generation vehicle cable. Each connecting busbar is made of conductive material. After being fixed to the horizontal insulating support plate through a set fixing hole, it is electrically connected to a corresponding outgoing - wire terminal of the three - phase four - wire knife switch through a set conductive hole.

[0008] The box door is rotatably installed at the opening of the box body through a rotating shaft to block or expose the opening.

[0009] Among them, after connecting the cable lug of the power - generation vehicle to the conductive terminal of the four quick - connection components or connecting the quick - plug connector of the power - generation vehicle cable to the conductive connector of the four quick - connection components, and connecting the low - voltage line to the four incoming - wire terminals of the three - phase four - wire knife switch, the on - off state of the three - phase four - wire knife switch is controlled to conduct or cut off the power supply from the power - generation vehicle to the low - voltage line.

[0010] Among them, each connecting busbar is provided with a grounding ring for installing a grounding rod. Among them, the grounding ring is made of conductive metal.

[0011] Among them, each connecting busbar is provided with a protective cover for cooperating with the corresponding grounding ring. Among them, the protective cover is made of insulating material to block or expose the corresponding grounding ring.

[0012] Among them, each conductive terminal, each conductive connector, and each grounding ring are detachably installed on each connecting busbar.

[0013] Among them, each conductive terminal and each connecting busbar are made of copper.

[0014] Among them, each conductive connector includes a housing and a conductive body arranged therein. Among them,

[0015] The housing is made of engineering plastics with high temperature resistance and impact resistance;

[0016] The conductor forms an electrical connection with the corresponding connecting busbar, and it is made of metal copper.

[0017] Among them, the production material of the engineering plastics is polycarbonate.

[0018] Among them, each of the fixing holes is a through hole.

[0019] Among them, each connecting busbar is fixed to the horizontal insulating support plate through a screw passing through the set fixing hole.

[0020] Among them, the horizontal insulating support plate and the insulating back plate are fixed by screws.

[0021] Implementing the embodiments of the present invention has the following beneficial effects:

[0022] 1. In the present invention, it is only necessary to connect the cable ear of the power generation vehicle to the conductive terminal of the quick-connect component or connect the cable quick plug to the conductive connector of the quick-connect component, and connect it to the low-voltage line through a three-phase four-wire knife switch. By controlling the three-phase four-wire knife switch, the power generation vehicle can be quickly connected or disconnected to supply power to the low-voltage line. Therefore, it completely replaces the work of the existing low-voltage access equipment and its coordinated multiple devices. It is not only simple to operate, but also quickly completes wiring without using any tools, greatly reducing the maintenance time, thereby improving the maintenance work efficiency, reducing the operation complexity and safety risks, and also meeting the multi-scenario access requirements such as ear access and quick insertion access;

[0023] 2. In the present invention, by connecting the grounding ring to the grounding rod, it not only meets the scenario access requirements of the grounding rod, but also ensures the safety of the emergency repair activities, ensuring that the repair personnel can ensure the grounding of the equipment before the fault, thereby reducing the risk of electric shock. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present invention.

[0025] Figure 1 It is a front view of a low-voltage multi-functional quick-connect junction box provided in the embodiments of the present invention;

[0026] Figure 2This is a schematic diagram of the access scenario of the power generation vehicle cable ear in a low-voltage multi-functional quick access connection box provided in the embodiments of the present invention. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] As Figure 1 and Figure 2 shown, in the embodiments of the present invention, a low-voltage multi-functional quick access connection box is proposed, which is used between the power generation vehicle cable and the low-voltage line, and includes a box body 1 and a box door 2; wherein,

[0029] The box body 1 is a semi-closed surrounding structure formed by a bottom wall 11, a top wall 12 and a plurality of side walls 13 located between the bottom wall 11 and the top wall 12. Its opening is located on one side wall 13, and an insulating backboard 3 is fixed on the other side wall 13 opposite to the opening by screws; on the side surface of the insulating backboard 3 facing the opening, there is a three-phase four-wire knife switch 4, four quick-connection components 5 and a transverse insulating support plate 6; the three-phase four-wire knife switch 4 is fixed on the insulating backboard 3 by screws and is arranged close to the bottom wall 11. One end of it is provided with four incoming line ends 41 for connecting the ABC phase lines and the neutral line N of the low-voltage line, and the other end is provided with four outgoing line ends 42 for connecting the four quick-connection components 5; the transverse insulating support plate 6 is fixed on the insulating backboard 3 by screws and is arranged away from the three-phase four-wire knife switch 4; the four quick-connection components 5 are fixed on the side surface of the transverse insulating support plate 6 facing the opening in a vertically spaced distribution manner; each quick-connection component 5 includes a conductive connection busbar 51 and a conductive connector 52 and / or a conductive terminal 53 provided thereon for connecting the quick plug connector of the power generation vehicle cable and / or for connecting the ear of the power generation vehicle cable; each connection busbar 51 is made of a conductive material (such as metal copper). After it is fixed to the transverse insulating support plate 6 through a set fixing hole 511 (such as a through hole) by screws, it is sleeved on the outer surface of the corresponding outgoing line end 42 in the three-phase four-wire knife switch 4 through a set conductive hole 512 and is electrically connected to the outgoing line end 42; each conductive connector 52 includes a housing and a conductive body arranged therein. The housing is made of an engineering plastic with high temperature resistance and impact resistance (such as the production material is polycarbonate); the conductive body is made of metal copper and is electrically connected to the corresponding connection busbar 51; each conductive terminal 53 is made of metal copper and is electrically connected to the corresponding connection busbar 51;

[0030] The box door 2 is rotatably installed at the opening of the box body 1 through a rotating shaft to block or expose the opening of the box body 1;

[0031] Among them, by connecting the cable ear of the power generation vehicle to the conductive terminal 53 of the four quick-connection components 5 or connecting the quick-insert connector of the power generation vehicle cable to the conductive connector 52 of the four quick-connection components 5, and connecting the low-voltage line to the four incoming line ends 41 of the three-phase four-wire knife switch 4, the on-off state of the three-phase four-wire knife switch 4 is controlled to conduct or cut off the power supply from the power generation vehicle to the low-voltage line.

[0032] In the embodiment of the present invention, a grounding ring 54 for installing a grounding rod (not shown) is provided on each connection busbar 51; among them, the grounding ring 54 is made of conductive metal. At this time, a protective cover (not shown) for cooperating with the corresponding grounding ring 54 is provided on each connection busbar 51; the protective cover is made of insulating material to shield or expose the corresponding grounding ring 54.

[0033] The working principle of a low-voltage multi-functional quick-access connection box in the embodiment of the present invention is that in the low-voltage line maintenance project, first, the three-phase line and the neutral line of the low-voltage line are connected to the four incoming line ends 41 of the three-phase four-wire knife switch 4 in the box body 1, and the three-phase four-wire knife switch 4 is controlled to be in the off state; secondly, it is ensured that the four outgoing line ends 42 of the three-phase four-wire knife switch 4 are connected to the four quick-connection components 5 and the connection state is good; then, the cable ear of the power generation vehicle is connected to the conductive terminal 53 of the four quick-connection components 5 or the quick-insert connector of the power generation vehicle cable is connected to the conductive connector 52 of the four quick-connection components 5; finally, the three-phase four-wire knife switch 4 is controlled to be in the on state, so that the power generation vehicle supplies power to the low-voltage line.

[0034] After the low-voltage line maintenance project is completed, first control the three-phase four-wire knife switch 4 to be in the off state; then, remove the power generation vehicle cable connected in the box body 1; finally, remove the low-voltage line from the four incoming line ends 41 of the three-phase four-wire knife switch 4 in the box body 1.

[0035] Implementing the embodiment of the present invention has the following beneficial effects:

[0036] 1. In the present invention, it is only necessary to connect the cable ear of the power generation vehicle to the conductive terminal of the quick-connection component or connect the quick-insert connector of the cable to the conductive connector of the quick-connection component, and connect it to the low-voltage line through the three-phase four-wire knife switch, so that by controlling the three-phase four-wire knife switch, the power generation vehicle can quickly conduct or cut off the power supply to the low-voltage line. Therefore, it completely replaces the work of the existing low-voltage access equipment and its coordinated multiple devices. It is not only simple to operate, can quickly complete wiring without using any tools, greatly reduces the maintenance time, thereby improving the maintenance work efficiency, reducing the operation complexity and safety risks, but also meets the multi-scenario access requirements such as ear access and quick insertion access.

[0037] 2. In the present invention, the grounding rod is connected through the grounding ring, which not only meets the scenario access requirements of the grounding rod, but also ensures the safety of the emergency repair activities, ensuring that the repair personnel can ensure the grounding of the equipment before the fault, thereby reducing the risk of electric shock.

[0038] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A low-voltage multi-functional quick access connection box is used between the power generation vehicle cable and the low-voltage line, and is characterized in that, It includes a box body and a box door; among them, the box body is a semi-closed surrounding structure formed by a bottom wall, a top wall, and a plurality of side walls located between the bottom wall and the top wall. Its opening is on one side wall, and an insulating backboard is fixed on another side wall opposite to the opening. On the side of the insulating backboard facing the opening, there is a three-phase four-wire knife switch, four quick-connect components, and a horizontal insulating support plate. The three-phase four-wire knife switch is fixed on the insulating backboard and is arranged close to the bottom wall. One end of it is provided with four incoming line terminals for connecting the ABC phase wires and the neutral wire of the low-voltage line, and the other end is provided with four outgoing line terminals for connecting the four quick-connect components. The horizontal insulating support plate is fixed on the insulating backboard and is arranged far from the three-phase four-wire knife switch. The four quick-connect components are fixed on the side of the horizontal insulating support plate facing the opening in a vertically spaced distribution manner. Each quick-connect component includes a conductive connecting busbar, a conductive connector provided thereon for connecting the quick plug connector of the power generation vehicle cable and / or a conductive terminal for connecting the cable lug of the power generation vehicle cable. Each connecting busbar is made of conductive material. After being fixed to the horizontal insulating support plate through a set fixing hole, it is electrically connected to a corresponding outgoing line terminal of the three-phase four-wire knife switch through a set conductive hole. The box door is rotatably installed at the opening of the box body through a rotating shaft to block or expose the opening. Among them, after connecting the cable lug of the power generation vehicle to the conductive terminal of the four quick-connect components or connecting the quick plug connector of the power generation vehicle cable to the conductive connector of the four quick-connect components, and connecting the low-voltage line to the four incoming line terminals of the three-phase four-wire knife switch, the on-off state of the three-phase four-wire knife switch is controlled to conduct or cut off the power supply of the power generation vehicle to the low-voltage line.

2. The low-voltage multi-functional quick access connection box according to claim 1, characterized in that Each connecting busbar is provided with a grounding ring for installing a grounding rod; among them, the grounding ring is made of conductive metal.

3. The low-voltage multi-functional quick access connection box according to claim 2, wherein Each connecting busbar is provided with a protective cover for cooperating with the corresponding grounding ring; among them, the protective cover is made of insulating material to block or expose the corresponding grounding ring.

4. The low-voltage multi-functional quick access connection box according to claim 3, wherein, Each conductive terminal, each conductive connector, and each grounding ring are detachably installed on each connecting busbar.

5. The low-voltage multi-functional quick access connection box according to claim 4, characterized in that, Each conductive terminal and each connecting busbar are made of copper.

6. The low-voltage multi-functional quick access connection box according to claim 5, wherein Each conductive connector includes a housing and a conductive body built therein; among them, the housing is made of engineering plastic with high temperature resistance and impact resistance; the conductive body forms an electrical connection with the corresponding connecting busbar and is made of copper.

7. The low-voltage multi-functional quick access connection box according to claim 6, characterized in that, The engineering plastic is made of polycarbonate.

8. The low-voltage multi-functional quick access connection box according to claim 7, characterized in that, Each fixing hole is a through hole.

9. The low-voltage multi-functional quick access connection box according to claim 8, wherein, Each connecting busbar is fixed to the horizontal insulating support plate through a screw passing through the set fixing hole.

10. The low-voltage multi-functional quick access connection box according to claim 9, characterized in that, The horizontal insulating support plate and the insulating backboard are fixed through screws.

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