CN109616989B - An on-column branch box - Google Patents

Abstract

The invention discloses a branch box on a column, which comprises a box body, a first bus bar, a second bus bar and an insulating plate, wherein the first bus bar is arranged on the box body; the box body is of a cuboid structure, and cabinet doors are arranged on the front side and the back side of the box body; the bottom of the box body is provided with a plurality of through holes for leading the bus into the box body or leading the service line out of the box body; the insulation board is vertically fixed in the box body, and four arc-shaped notches are formed in the top of the insulation board; three first bus bars and one second bus bar are fixed on the insulating plate; the three first bus bars respectively correspond to A, B, C three phases of the main lead; the second bus bar corresponds to a zero line, a plurality of wiring terminals are arranged on the three-phase bus bar respectively, a plurality of wiring terminals in corresponding number are arranged on the zero line bus bar, and the service wires are connected to the bus bar and led out through the wiring holes below the box body; lead off a four-core aluminium system cable from leading wire, the cable adopts ann ordinary fastener to be connected with leading wire, and the other end inserts in the feeder pillar through box below entrance hole, arranges or second generating line row electric connection with the first generating line that corresponds.

Description

An on-column branch box

technical field

The invention belongs to the technical field of power systems, and particularly relates to an on-column branch box.

Background technique

In urban suburbs and rural bungalow gathering areas, for the convenience of wiring, a plurality of household lines will be drawn from a pole to the user's home. At present, the methods of connecting the main line and the household line are widely used: connecting the low-voltage distribution box and connecting Low-voltage copper-aluminum connection clamps, from the perspective of long-term operation, the existing connection methods have some deficiencies, resulting in frequent failures and difficulty in troubleshooting, which needs to be improved.

At present, the widely used methods for connecting the main line and the household line include connecting via a low-voltage distribution box and connecting via a copper-aluminum household line clip, which has the following technical problems

1) The installation process of the copper-aluminum connection clamp is easy to damage the main wire and affect the service life of the line;

2) When connecting multiple household wires in a short distance, it is necessary to install multiple copper-aluminum household wire clips, which is costly and causes multiple damages to the insulation of the main wires during the installation process;

3) The copper-aluminum household line clamp can only connect one household line, the wiring is chaotic, which increases the difficulty of operation and maintenance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an on-column branch box to solve the above technical problems. The invention connects a plurality of household connecting wires to one position of the main wire, avoids repeated damage to the main wire caused by repeated stripping, and has beautiful appearance and easy maintenance.

In order to achieve the above object, the present invention adopts the following technical solutions:

An on-column branch box, comprising a box body, a first bus bar, a second bus bar and an insulating plate;

The box body is a cuboid structure, and its front and back are provided with cabinet doors; the bottom of the box body is provided with a number of through holes for the busbar to enter the box or the household line to be led out of the box;

The insulating plate is vertically fixed in the box, and the top of the insulating plate is provided with four arc-shaped gaps; three first busbars and one second busbar are fixed on the insulating plate; the three first busbars correspond to the main conductors respectively. A, B, C three-phase; the second busbar corresponds to the neutral line, each of the three-phase busbars has multiple terminals, the neutral busbar has a corresponding number of multiple terminals, and the household line is connected to the busbar Lead out through the outlet hole at the bottom of the box;

A four-core aluminum cable is drawn from the main wire. The cable is connected to the main wire by an Amp clip, and the other end is connected to the branch box through the wire inlet hole at the bottom of the box, and is connected to the corresponding first busbar or second busbar. Electrical connection.

Further, the three first busbars and the one second busbar are all provided with busbar fixed ends, and the busbar fixed ends are arranged in dislocation and aligned with the four arc-shaped notches.

Further, the first busbar is convex, the fixed end of the busbar is at the top, and the four terminals are at the bottom; the second busbar is straight, and all the terminals and the fixed ends of the busbar are located in one row; Set the square mounting hole on the busbar.

Further, the household line is fixed on the first bus bar or the second bus bar by means of crimping screws;

A crimping screw, including a screw; the screw includes a square head and a threaded rod, with a circular wire hole in the middle of the square head for placing the wire; the threaded rod is connected to the side wall of the square head;

Nut, used to fix the wire and the terminal in cooperation with the threaded rod;

Further, the extending direction of the threaded rod is perpendicular to the extending direction of the circular wire hole.

Further, the inner wall of the circular wire hole is threaded; the terminal has a square mounting hole.

Further, in the installation state, the wire passes through the round wire hole, and the square head of the screw is inserted into the square installation hole of the terminal; the nut is tightened on the threaded rod to fix the wire and the terminal.

Further, the gap between the two sides of the square head extending parallel to the wire and the square mounting hole 30 is A, and the gap between the two sides of the square head perpendicular to the extending direction of the wire and the square installation hole 30 is B; A<B There is a gasket between the nut and the terminal, and the gasket is sleeved on the threaded rod; the middle of the gasket is a square hole, the size of the square hole is larger than the size of the square head of the screw, and the square head can pass through the square hole.

Further, the first bus bar and the second bus bar are electrically connected with one-in and multiple-out household wire clips;

The one-in-multiple-out household line clamp includes a main line clamp and a household line clamp connected to each other;

The main wire clamp includes a first block body, the first block body is recessed to form an accommodating cavity, and the accommodating cavity is installed with a wire pressing wedge block and a locking block that cooperate with each other; the upper part of the first block body is provided with a semicircular shape Hook; the semicircular hook is located just above the accommodating cavity;

The pressure line wedge is a right-angled trapezoidal wedge, and the locking block is a right-angled triangular block, and the inclined surfaces of the two cooperate with each other; Core aluminum cable;

The side wall of the first block is provided with a first threaded hole, and the first threaded hole is installed with a first bolt; the side wall of the locking block facing the first bolt is provided with a second threaded hole; The inner thread of the second threaded hole on the locking block is reversed;

A third threaded hole is provided on the bottom of the first block facing the small end of the wire pressing wedge, the second bolt is installed in the third threaded hole, and the wire pressing wedge can be pushed up and down by screwing the second bolt;

The four-core aluminum cable is clamped between the groove on the top of the crimping wedge and the semicircular hook;

The household line clamp includes a second block fixed on the side of the first block, and the first block and the second block are either a split structure or an integrated structure;

The bottom of the second block is provided with a number of round holes for wire clips, the side wall of each round hole of the wire clip is provided with a fourth threaded hole, and a third screw is installed in the fourth threaded hole; the household line is pressed by the third screw Tighten it in the corresponding round hole of the wire clip.

Further, there are uneven corrugations on the matching slope between the locking block and the line pressing wedge.

Compared with the prior art, the present invention has the following beneficial effects:

1), beautiful appearance, convenient wiring and maintenance;

2), installed on the column, saving ground space;

3), one position of the main line can lead to multiple household lines, and the damage to the main line is small;

4) The installation of the branch box is simple and the construction efficiency is high;

5), low cost and reusable.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a branch box on a column installed on a utility pole of the present invention;

Figure 2 is a schematic diagram of the arrangement of the busbars inside the branch box on the column;

Fig. 3 is the schematic diagram of the structure of the crimping screw;

Figure 4 is a cross-sectional view of the crimping screw shown in Figure 3;

Figure 5 is a front view of the installation state of the crimping screw;

Figure 6 is a cross-sectional view of the structure shown in Figure 5;

Fig. 7 is a sectional view of one-in-multiple-out household line clamp;

Figure 8 is an outline view of the one-in-multiple-out line clamp.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

The following detailed descriptions are all exemplary descriptions and are intended to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention.

Example 1

Referring to FIG. 1 , the present invention provides an on-column branch box 101 , which can be fixed on the utility pole 200 through a clamp, and is used to lead the main wire 300 down to connect with a plurality of household wires 100 and lead out to the column. Branch box 101 .

Referring to FIG. 2, the branch box 101 on the column includes a box body, a first bus bar 102, a second bus bar 103 and an insulating plate 105; Open or closed for electricians to perform wiring operations. The bottom of the box is provided with a number of through holes for the busbar to enter the box or the household line to be led out of the box.

The insulating plate 105 is vertically fixed in the box, and the top of the insulating plate 105 is provided with four arc-shaped notches 104 ; three first bus bars 102 and one second bus bar 103 are fixed on the insulating plate 105 . The three first busbars 102 correspond to the A, B, and C phases of the main conductors respectively; the second busbar 103 corresponds to the neutral line, each of the three-phase busbars has a plurality of terminals, and the neutral busbar has a corresponding number of terminals. A plurality of terminals, the household line is connected to the bus bar and drawn out through the four outlet holes below the box body, and the drawn household line 100 is connected to the user through the two sets of cross arms below the branch box.

The three first busbars 102 and the one second busbar 103 are all provided with busbar fixed ends, and the busbar fixed ends are dislocated and aligned with the four arc-shaped notches 104 to facilitate wiring.

The first bus bar 102 is convex, the bus bar fixed end is located at the top, and the four terminals are located at the bottom; the second bus bar 103 is straight, and all the terminals and bus fixed ends are located in one row. All terminals are square mounting holes 30 provided on the busbar.

A four-core aluminum cable is drawn from the main wire. The cable is connected to the main wire 300 with an Amp clip. The other end is crimped and the threading nose is connected to the branch box through the wire inlet hole at the bottom of the box. The arc-shaped gap 4 is wound around the upper busbar fixing end of the busbar, and fixed with screws respectively.

The household line 100 is generally a copper wire with a cross-sectional area of 16 mm ² or 25 mm ² , and is fixed on the bus bar with a crimping screw.

Please refer to Figure 3 and Figure 6, the crimping screw, including screw 1, nut 4 and washer 5.

The screw 1 includes a square head 11 and a threaded rod 12. There is a circular wire hole 6 in the middle of the square head 11, which is used to put the wire; the threaded rod 12 is connected to the side wall of the square head 11, and the extension direction of the threaded rod 12 is consistent with the circular wire. The extending direction of the hole 6 is vertical. The nut 4 and the washer 5 are used to cooperate with the threaded rod 12 .

The inner wall of the round wire hole 6 is threaded to increase the friction between the wire 2 and the wire hole 6 , and the wire 2 is not easy to fall off from the wire hole 6 .

Terminal 3 of the device has square mounting holes 30 .

When installing, pass the wire through the round wire hole 110, insert the square head 11 of the screw 1 into the square installation hole 30 of the terminal 3, and insert the left and right sides of the square head 11 and the square installation hole 30 each about 0.2mm. There is a gap of about 1.5mm on the upper and lower sides. During the tightening process, fix one end of the screw 1, and tighten the nut 4 to crimp the wire to the equipment terminal 3.

When the screw is corroded and difficult to twist, the wire 2 can be cut along the upper and lower sides of the square head 11, and the screw 1 can be dropped from the square mounting hole 30.

The center of the gasket 5 is square, the square hole is slightly larger than the square head 11 of the screw, and the square head 11 of the screw 1 can pass through it, which can adapt to the thinner terminal block. Increase or decrease the number of spacers depending on the diameter of the wire.

Terminal 3 is the second bus bar 103 after the first bus bar 102 .

Example 2

For some use environments with strict space requirements, it is impossible to arrange enough terminals on the bus bar to meet the branch requirements. At this time, install one-in-multiple-outline clips on the busbar to be used in conjunction with the busbar terminals, so as to provide more terminals in the same space, form more branch outputs for users, and meet the needs of users, and Take up less space.

In this embodiment, the fixed ends of the busbars of the first busbar 102 and the second busbar 103 in Embodiment 1 are replaced with one-in-multiple-outline clamps; on the first bus bar 102 or the second bus bar 103.

The one-in-multiple-outgoing line clamp includes a main line clamp 402 and a home line clamp 400 that are connected to each other.

The main wire clamp 402 includes a first block, and a accommodating cavity is recessed on the first block, and the accommodating cavity is installed with a wire pressing wedge 403 and a locking block 410 that cooperate with each other; the upper part of the first block is provided with The semicircular hook 404; the semicircular hook 404 is located just above the accommodating cavity.

The line pressing wedge 403 is a right-angled trapezoidal wedge, and the locking block 410 is a right-angled triangular block, and the inclined surfaces of the two are matched with each other; on the fixed bus.

The side wall of the first block is provided with a first threaded hole, and the first threaded hole is installed with a first bolt 401; the side wall of the locking block 410 facing the first bolt 401 is provided with a second threaded hole 409; the first bolt The external thread of 401 is opposite to the internal thread of the second threaded hole 409 on the locking block 410, that is, when the first bolt 401 is tightened, the screw will not enter the second threaded hole 409 on the locking block 410 and only have a direction to it. Due to the pressing force on the right side, when the first bolt 401 is loosened, the screw enters the second threaded hole 409 and pulls the locking block 410 to the left.

A third threaded hole is provided on the bottom of the first block facing the small end of the wire-pressing wedge 403, and the second bolt 407 is installed in the third threaded hole, and the wire-pressing wedge 403 can be pushed by screwing the second bolt 407 Movement up and down.

By screwing the second bolt 407 to push the wire-pressing wedge 403 to move upward, the busbar is clamped between the groove on the top of the wire-pressing wedge 403 and the semicircular hook 404, and then the first bolt 401 is tightened to push the locking block 410 to the The right movement compresses the wire pressing wedge 403, thereby forming a double locking structure.

There are uneven corrugations 408 on the matching slope between the locking block 410 and the wire pressing wedge 403, which increases the friction between the two blocks, and even if the screw loosens the wire pressing wedge 403, the busbar can be pressed.

The household line clamp 400 includes a second block fixed on the side of the first block, and the first block and the second block can be a separate structure or an integrated structure.

The bottom of the second block is provided with four wire clip circular holes 406 (multiple as required), and the side wall of each wire clip circular hole 406 is provided with a fourth threaded hole, and a fourth threaded hole is installed in the fourth threaded hole Three screws 405; the household line clamp is crimped with a single screw, put the household line into the round hole 406 of the line clip, and fix the household line by tightening the third screw 405, in order to evenly stress the four crimping screws are distributed on the front One, one on the back, two on the side.

The main line clip and the household line clip are connected into an integral structure. One busbar can be connected to four household lines, saving space. If you need multiple household lines, you can use Figure 3-6. The fixing method is fixed on the connecting end of the bus bar.

The one-in-multiple-outline clamp has the advantages of reliable connection, detachability and high installation efficiency.

It is known from the technical common sense that the present invention can be realized by other embodiments without departing from its spirit or essential characteristics. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims (4)

1. An on-column branch box, characterized by comprising a box body, a first bus bar (102), a second bus bar (103) and an insulating plate (105); The box body is a cuboid structure, and its front and back are provided with cabinet doors; the bottom of the box body is provided with a number of through holes for four-core aluminum cables to enter the box or lead out the household wires to the outside of the box; The insulating plate (105) is vertically fixed in the box, and the top of the insulating plate (105) is provided with four arc-shaped notches (104); the insulating plate (105) is fixed with three first busbars (102) and a second Two busbars (103); the three first busbars (102) correspond to the A, B, and C phases of the main conductors respectively; the second busbar (103) corresponds to the neutral line, and the three first busbars (102) Each has a plurality of terminals, the second bus bar (103) has a corresponding number of multiple terminals, and the household line is connected to the first bus bar (102) and the second bus bar (103) through the lower part of the box. Lead out from the outlet hole in the through hole; Lead a four-core aluminum cable from the main conductor, the four-core aluminum cable is connected to the main conductor (300) by using an Amp clip, and the other end of the four-core aluminum cable passes through the The wire inlet hole in the through hole is connected into the branch box, and the core wire of the four-core aluminum cable is electrically connected with the corresponding first bus bar (102) or the second bus bar (103) respectively; The three first busbars (102) and the one second busbar (103) are each provided with a busbar fixed end, and the busbar fixed ends are arranged in dislocation and aligned with the four arc-shaped notches (104); The first busbar (102) is convex, the fixed end of the busbar is at the top, and the four terminals are at the bottom; the second busbar (103) is straight, and all the terminals and the fixed ends of the busbar are located in one row; all wiring The ends are square mounting holes (30) arranged on the first bus bar (102) and the second bus bar (103); The household line (100) is fixed on the first busbar (102) or the second busbar (103) by means of crimping screws; A crimping screw, including a screw (1) and a nut (4); the screw (1) includes a square head (11) and a threaded rod (12), and a circular wire hole (6) is provided in the middle of the square head (11), The wire used for connecting the household line; the threaded rod (12) is connected to the side wall of the square head (11); The nut (4) is used to cooperate with the threaded rod (12) to fix the wire and the terminal; The gap between the two sides of the square head (11) parallel to the extending direction of the wire and the square mounting hole (30) is A, and the gap between the two sides of the square head (11) perpendicular to the extending direction of the wire and the square mounting hole (30) is A. B; A<B; a gasket (5) is provided between the nut (4) and the terminal (3), and the gasket (5) is sleeved on the threaded rod (12); the gasket (5) has a square hole in the middle, The size of the square hole is larger than the size of the square head of the screw, so that the square head can pass through the square hole. 2 . The branch box on a column according to claim 1 , wherein the extending direction of the threaded rod ( 12 ) is perpendicular to the extending direction of the circular wire hole ( 6 ). 3 . 3. An on-column branch box according to claim 1, characterized in that the inner wall of the circular wire hole (6) is threaded. 4. The branch box on a column according to claim 1, characterized in that, in the installation state, the wire passes through the circular wire hole (110), and the square head (11) of the screw (1) is inserted into the terminal (110). 3) in the square mounting hole (30); tighten the nut (4) on the threaded rod (12) to fix the wire with the terminal (3).

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