CN203205795U - A low-voltage cable branch box inlet and outlet busbar system - Google Patents

Abstract

A low-voltage cable branch box wire inlet and outlet bus system is of a modular structure and is formed by arranging a plurality of bus box modules in parallel in a low-voltage cable branch box body, wherein each bus box module is a power supply item, and the plurality of bus box modules form a plurality of power supplies; each bus box module is provided with a plurality of bus mounting boxes 1 in parallel to form a bus system which can be inserted with a plurality of incoming line modules or outgoing line modules in parallel; the bus is arranged in a bus mounting box, the front surface of the bus mounting box is of a grid-shaped enveloping structure, and the bus is wrapped in the middle of the bus mounting box; the front surface of the bus mounting box is provided with a plurality of plug-in sockets which are arranged side by side, and a bus mounting box body between every two plug-in sockets is provided with a fixed screw hole. The utility model has high protection level and reduces the probability of electric shock accidents; the plug-in installation is simple and convenient; the reliability is high, and the power failure area is reduced during the failure; the movable part is arranged, so that the device is maintenance-free and can be suitable for severe environments; the modularization is easy to expand.

Description

A low-voltage cable branch box inlet and outlet busbar system

technical field

The utility model relates to an electrical connection device, in particular to a system device for connecting incoming and outgoing lines in a low-voltage cable branch box, which is mainly used for cable connection of incoming and outgoing lines outdoors, in cable wells and in corridors.

Background technique

Cable branch box With the development of distribution network cabling process, when the distribution of independent loads with small capacity is relatively concentrated, cable branch boxes have been widely used to connect multiple branches of cables, because the branch box cannot directly operate each channel. It is only used as a cable branch, and the main function of the cable branch box is to branch or transfer cables. The so-called cable branching refers to: there are many small-area cables on a relatively long-distance line, which often leads to waste of cable use. Therefore, when going out to the power load, the main large cable is often used to go out, and then when it is close to the load. , Use the cable branch box to divide the main cable into several small-area cables, and the small-area cables are connected to the load. This wiring method is widely used in power supply for street lamps in urban power grids, and power supply for small users. The so-called cable transfer means: on a relatively long line, the length of the cable cannot meet the requirements of the line, then a cable connector or a cable transfer box must be used. Usually, a cable intermediate connector is used for a short distance, but the line is relatively long. Sometimes, according to experience, on the cable line above 1000M, if there are multiple intermediate connectors in the middle of the cable, in order to ensure safety, the cable branch box will be considered for transfer. Cable branch boxes have been widely used outdoors, and a large number of them have begun to be used in low-voltage networks. The selection of cable branch boxes follows the rapid development of the modernization of the power industry, and the transformation of the power grid has started in an all-round way. When the underground main line cable needs to realize multi-circuit distribution and distribution at a certain distance, it is an economical, convenient and safe way to use the cable branch box as an important supporting equipment for power distribution.

With the extensive use of cables in low-voltage AC, load distribution requires a large number of low-voltage cable branch boxes. These branch boxes are mainly installed in: ① outdoors, ② cable wells, and ③ corridors; these places are due to large temperature and humidity changes, dusty, and ventilation Poor, harsh environment, no dedicated maintenance. Therefore, these low-voltage cable branch boxes are required to ensure the following performance:

① Reliable safety protection;

② Able to withstand harsh environmental influences;

③ As little maintenance as possible;

④ It can be installed quickly and conveniently;

⑤ When the number of users increases, it can be easily expanded;

⑥ When faults such as short circuit/overload occur, it is required to limit the impact to a minimum range to reduce the blackout area;

⑦ It is easy to find faults.

However, a large number of distribution boxes currently in use are directly connected to copper bars without protection, which will lead to:

① In case someone touches the exposed copper wire, it will directly lead to the danger of electric shock;

② If any branch circuit breaks down, the whole branch box is in crisis;

③ When you want to expand the capacity and increase the outgoing line, the entire branch box will be powered off, and then the copper bars will be re-arranged;

④ If a fault occurs, it is very troublesome to find it, and it must be searched one by one.

Therefore it is necessary to improve this. Some relevant patents were found through domestic patent literature search, and the most relevant patents of the utility model mainly include the following items:

1. The patent number is CN201120015501.9, and the patent name is a utility model patent of "a cable branch box". This patent provides a cable branch box, which includes a box body, and the two sides of the box body are vertically fixed with insulating bus bars There are copper bars between the insulated bus bar support frames, wiring boards are mounted on the copper bars, and cable connection terminals are arranged on the wiring boards. At the same time, independent wiring boards can be used for the incoming and outgoing wires, and the incoming and outgoing cables do not need crimping terminals, and can be directly connected to the connecting terminals on the wiring board. In this way, the entire incoming line and outgoing line unit is in a closed structure, without exposed live parts, and has good safety performance. Moreover, the copper bar of the cable branch box of the utility model does not need to be bent, and the precision requirements for the design and installation of the copper bar are relatively low. However, this patent still does not solve the problem that when you want to expand the capacity and increase the outgoing line, the entire branch box will be powered off, and then the copper bars will be re-arranged; and the joints used are not ordinary joints, so the connection is still more troublesome and not easy. Replacement, the joint part is still violent, which is likely to cause electric shock accidents.

2. The patent number is CN201020650124, and the patent name is a utility model patent of "a cable branch box". The T-shaped plug on the casing, the incoming cable and the outgoing cable connected to the box are respectively connected to the T-shaped plug, and the incoming cable passes through the casing and the T A type plug is connected with the outgoing cable to form a branching circuit, and the bushing is a branching bushing, and the branching bushing has at least three incoming and outgoing line sockets, and at least one of the incoming and outgoing line sockets is inserted and fixed with a grounding device. However, this patent still does not solve the problem of exposed copper cables, and the structure is very complicated, which is inconvenient for installation and replacement, especially troublesome for capacity expansion.

3. The patent number is CN201020172082.5, and the patent name is a utility model patent named "low voltage cable branch box". This patent discloses a low voltage cable branch box, which includes a box body, a box cover, and copper busbars and Circuit breaker; it is characterized in that it also includes a closed busbar system for enclosing copper busbars; the box body is a non-metallic insulating shell made of unsaturated polyester resin glass fiber reinforced molding compound material; at the same time, the inside of the box body The copper busbar is sealed with an insulated closed busbar system to prevent the possibility of artificial electric shock for operators, making it safe to operate and ensuring the safe operation of power users; and the busbar system is made of unsaturated polyester resin glass fiber reinforced plastic shell, which has a novel structure and excellent sealing performance. Good; it has the advantages of convenient installation, low cost, beautiful appearance, strong versatility, flexible and convenient disassembly and assembly. Although this patent solves the problem of exposed copper bars, the patent still does not solve the problem of how to expand the capacity, which cannot be expanded, and if a single line is damaged, all must be replaced.

4. The patent number is CN200920180719.2, and the patent name is "low voltage cable branch box". , there is a mounting bracket in the box, and several switches with fuses are installed on the mounting bracket; the three-phase incoming line is introduced from an opening on the bottom of the box, and is divided into groups of three-phase outgoing branch circuits, from the bottom of the side of the box. Leading out from other openings, each phase incoming line is respectively connected in series with a switch with a fuse, and each phase outgoing line of each group of three-phase outgoing line branches is also connected in series with a switch with a fuse. However, this patent still adopts common copper bars for incoming and outgoing lines, which does not solve the problem of exposed copper bars, and is prone to the risk of electric shock when the lines go out.

To sum up, the existing low-voltage cable branch boxes all have the above-mentioned problems to varying degrees, so it is still necessary to further improve this.

Utility model content

The purpose of this utility model is to propose a low-voltage cable branch box busbar system with no exposed incoming and outgoing lines and convenient expansion and installation for the shortcomings of the existing low-voltage cable branch box.

In order to achieve the purpose of this utility model, the proposed technical implementation plan is: a low-voltage cable branch box inlet and outlet busbar system, which is a modular structure, and a plurality of busbar box modules are arranged in parallel on the busbar system installation plate in the low-voltage cable branch box In the above structure, each bus box module is a power supply item, and multiple bus box modules form multiple power supplies; each bus box module is arranged in parallel with multiple bus installation boxes 1, forming multiple incoming line modules that can be inserted in parallel or the busbar system of the outlet module.

Further, the busbar box module includes a busbar installation box, the copper busbars are installed in the busbar installation box, and the busbar installation box is a grid-shaped envelope structure on the front, wrapping the copper busbars in the middle; The cavity of the module can be installed with the plug-in and out-type power interface of the module; the plug-in power interface can be combined with the copper busbar to form electrical conduction.

Further, the busbar box module is fixed on the busbar system installation plate through fixing screw holes, and the nuts are pre-buried in the busbar installation box body, and the fixing screw holes are installed from one side of the busbar system installation plate to the busbar The box is screwed in, and the busbar box module is firmly connected with the busbar system installation plate.

Further, the busbar installation box is an insulating structure, and the copper busbar is wrapped in the busbar installation box in a closed shape except for the plug-in socket with external interfaces; the bottom of the copper busbar and the busbar system installation plate are cushioned. There is an insulating partition, and the insulating partition is clamped in the slot at the bottom of the busbar installation box.

Further, the busbar system is installed on the box body bracket of the low-voltage cable branch box through the busbar system installation plate; one end of the busbar system installation plate is provided with a hook, and the hook is hooked on the groove of the box body bracket of the low-voltage cable branch box , to form a hinged connection, and then clamp the other end of the busbar system installation plate in the box bracket of the low-voltage cable branch box, and fix it with fasteners.

Further, the length of the copper busbar is determined according to the requirements of different users, and the surface of the copper busbar is silver-plated to have good electrical conductivity.

Further, the plug-in socket in the busbar installation box and the busbar installation box are of an integrated structure, and are made of the same insulating material.

The utility model has the advantages of:

1. Safety, with high protection level, protection level IP20, which can ensure the safety of life;

2. The length of the copper busbar depends on the requirements of different users;

3. The inlet and outlet lines adopt plug-in installation, which is simple and convenient;

4. The surface of the copper busbar is silver-plated, which has good electrical conductivity;

5. The incoming and outgoing modules can be installed without drilling, which is fast and convenient.

Description of drawings

Fig. 1 is the schematic diagram of enlarged structure of the utility model bus installation box;

Fig. 2 is a schematic diagram of the main structure of the utility model;

Fig. 3 is a top view schematic diagram of the main structure of the utility model;

Fig. 4 is a schematic diagram of the utility model and the installation structure of the incoming and outgoing line modules.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

It can be seen from the accompanying drawings that the utility model relates to a low-voltage cable branch box inlet and outlet busbar system, which is a modular structure composed of a plurality of busbar box modules 8 arranged in parallel on the busbar system mounting plate 3 in the low-voltage cable branch box. Each busbar box module 8 is a power supply item, and multiple busbar box modules form multiple power supplies; each busbar box module 8 is arranged in parallel with multiple busbar installation boxes 1, forming multiple incoming line modules or Busbar system for outgoing modules.

Further, the busbar box module 8 includes a busbar installation box 1, and the copper busbar 2 is installed in the busbar installation box 1. The busbar installation box 1 is a grid-shaped envelope structure on the front, and the copper busbar 2 is wrapped in the middle; the busbar installation The cavity of the grid on the front side of the box 1 is a plug-in socket matching the plug-in power interface of the module; the plug-in power interface is combined with the copper bus bar 2 to form conduction.

Further, the busbar box module 8 is fixed on the busbar system installation plate 3 through the fixing screw hole 6, and the nut is pre-buried in the busbar installation box body, and the fixing screw hole 6 is from the busbar system installation plate 3. One side is screwed into the busbar installation box 1 to securely connect the busbar box module 8 with the busbar system installation plate 3 .

Further, the busbar installation box 1 is an insulating structure, and the copper busbar 2 is wrapped in the busbar installation box in a closed shape except for the external interface of the plug-in socket; the bottom of the copper busbar 2 and the busbar system installation plate An insulating partition 7 is laid between the 3, and the insulating partition 7 is stuck in the slot at the bottom of the busbar installation box 1.

Further, the bus system is installed on the box support of the low-voltage cable branch box through the bus system installation plate 3; one end of the bus system installation plate 3 is provided with a hook 5, and the hook 5 is hooked on the box support of the low-voltage cable branch box A hinged connection is formed on the groove of the bus bar system, and then the other clamping plate 4 of the busbar system mounting plate 3 is clamped in the box body bracket of the low-voltage cable branch box and fixed by fasteners.

Further, the length of the copper busbar 2 is determined according to the requirements of different users, and the surface of the copper busbar 2 is silver-plated to have good electrical conductivity.

Further, the plug-in socket in the busbar installation box and the busbar installation box are of an integrated structure, and are made of the same insulating material.

The utility model has the advantages of:

1. The busbar system is formed through the combination of modular structure, which has the characteristics of beautiful appearance and strong combination function;

2. The length of the copper busbar depends on the requirements of different users;

3. The surface of the copper busbar is silver-plated, which has good electrical conductivity;

4. There is no exposed line as a whole, which can ensure the safety of life;

5. The incoming and outgoing modules can be installed without drilling, and the installation is quick and convenient;

6. It is easy to expand users.

Claims (5)

1. low-voltage cable junction box line bus-bar system, it is characterized in that, be modular construction, be arranged in parallel within the low-voltage cable junction box body by a plurality of bus box modules and consist of, each bus box module is a power supply item, and a plurality of bus box modules form multinomial power supply; Each bus box module again parallel is furnished with a plurality of bus mounting boxs, and formation can a plurality of incoming line modules of parallel inserted or the bus-bar system of outlet module.

2. low-voltage cable junction box line bus-bar system as claimed in claim 1, it is characterized in that, described bus box module comprises the bus mounting box, and copper bus-bar is installed in the bus mounting box, the bus mounting box is front lattice-shaped envelope structure, in the middle of copper bus-bar is wrapped in; The cavity of bus mounting box front coral lattice can be installed into out the plug-in energising interface of module; Plug-in energising interface is combined with copper bus-bar, forms conduction.

3. low-voltage cable junction box line bus-bar system as claimed in claim 2, it is characterized in that, described bus box module is fixed on the bus-bar system mounting panel by fixing threaded hole, and nut is to be embedded in bus to install in the box body in advance, and fixing threaded hole is the side direction bus mounting box screw-in from the bus-bar system mounting panel, and bus box module and bus-bar system mounting panel are fastenedly connected.

4. low-voltage cable junction box line bus-bar system as claimed in claim 3 is characterized in that, described bus mounting box is insulating structure, and copper busbar is externally had the interface except the plug-in socket, all is wrapped in bus with closed and installs in the box body; Be lined with insulating barrier between copper busbar bottom and the bus-bar system mounting panel, insulating barrier is stuck in the draw-in groove of bus mounting box bottom.

5. low-voltage cable junction box line bus-bar system as claimed in claim 3 is characterized in that, described bus-bar system is installed on the antinose-dive leg of low-voltage cable junction box by the bus-bar system mounting panel; One of the bus-bar system mounting panel is provided with hook, be hooked on the groove of antinose-dive leg of low-voltage cable junction box, form a hinge type and connect, the other end clamp with the bus-bar system mounting panel is stuck in the antinose-dive leg of low-voltage cable junction box again, fixes by securing member.

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