CN110492413A - A kind of semi-enclosed small bus connecting bracket of control - Google Patents

Abstract

The invention relates to a semi-enclosed control small busbar connection bracket, which includes a small busbar seat and a mounting guide rail. The small busbar seat includes a conductive bar, an insulating module, a pressure plate, and an insulating cover plate. The conductive bar is a U-shaped structure. Threaded holes are provided at both ends, and the top surface is a horizontal plane; blind holes are provided at both ends of the insulation module, the fixing screws are connected to the conductive row through the threaded holes, and the bottom ends of the fixing screws are inserted into the blind holes; the pressure plate is set in the insulation module , the compression screw is threadedly connected with the pressure plate, the bottom of the compression screw compresses the small control bus bar on the conductive bar, the insulating cover is arranged on the upper part of the compression screw, and is snapped connected with the insulation module. The advantages are: it has the advantages of wide application range, large effective contact area, firm crimping, large safety distance and convenient positioning.

Description

A semi-enclosed control small bus connection bracket

technical field

The invention belongs to the field of busbar connection, in particular to a semi-enclosed small busbar connection bracket suitable for 10-35kV high-voltage switchgear.

Background technique

The small control busbar is widely used in 10-35kV high-voltage switchgear. The small control busbar is installed in the small busbar room on the top of a complete set of switchgear. role. The control bus is usually connected by copper rods or cables, which can save secondary cables and simplify the circuit.

When the existing small busbar frame is in the form of copper rods, the connection method is to bend a metal sheet into a U shape, and use the cross section of the sheet and the surface of the conductive bar bent into a V shape to crimp the outer diameter of the copper rod. Since it is a line contact, There are defects such as weak connection and small contact area, which can easily cause failure of large-scale protection and control circuits.

When the existing small busbars are in the form of copper rods, the adjacent small busbars are fastened with copper sleeves. Considering the requirements for the distance between phases, the copper sleeves need to be misplaced, resulting in different lengths of each section of small busbars, which brings difficulties to site selection and installation. inconvenient.

The top of the existing small busbar frame adopts an open structure. When the cover plate of the small busbar chamber is deformed by force, the distance between the live conductor and the ground is likely to be small, resulting in a short circuit accident and affecting safe production operations.

Contents of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a semi-enclosed control small busbar connection bracket, which increases the contact area between the small busbar and the conductive bar, and solves the problems of small contact area and weak connection; The method of setting an insulating cover plate prevents the distance between the charged conductor and the ground from being small.

To achieve the above object, the present invention is achieved through the following technical solutions:

A semi-enclosed control small busbar connection bracket, including a small busbar seat and a mounting guide rail. The small busbar seat includes a conductive bar, an insulating module, a pressure bearing plate, and an insulating cover plate. The conductive bar has a U-shaped structure, and both ends are There are threaded holes, and the top surface is horizontal; both ends of the insulation module are provided with blind holes, the fixing screws are connected to the conductive row through the threaded holes, and the bottom of the fixing screw is inserted into the blind hole; the conductive row and the pressure plate are set in the insulating module , the compression screw is threadedly connected with the pressure plate, the bottom of the compression screw compresses the small control bus bar on the conductive bar, the insulating cover is arranged on the upper part of the compression screw, and is snap-connected with the insulation module.

The conductive row is made of red copper plate, and the surface is treated with tin or silver plating.

The end of the small control bus has two planes up and down.

The insulation module includes a left insulation module and a right insulation module, and the left insulation module and the right insulation module are plugged.

More than two small busbar seats are snap-connected on the installation guide rail.

The bottom of the insulating module is provided with a card slot.

The two ends of the insulating cover are provided with hook-shaped structures, the top ends of the insulating module are provided with grooves matching the hook-shaped structures, the top of the insulating module is provided with cavities for accommodating the compression screws, and the insulating cover covers the cavity body covering.

At least two small control busbars are compressed on the conductive bar.

Compared with prior art, the beneficial effect of the present invention is:

The semi-enclosed control small bus connection bracket has the advantages of wide application range, large effective contact area, firm crimping, large safety distance, and convenient positioning. The method of clamping the control small bus bar with the conductive bar and the compression screw, and the contact surface of the control small bus bar is flat, which increases the contact area between the control small bus bar and the conductive bar, and effectively solves the problem of small contact area and poor connection. The problem of firmness, and at the same time, it also enables the control small busbars of different wire diameters to be effectively connected to the conductive bar at the same time. The insulation module adopts a split structure design, which can facilitate the installation of the pressure plate and the conductive bar; by adding an insulating cover plate, the problem of the small distance between the live conductor and the ground is effectively solved. At the same time, the small bus bar is controlled to be made into a standard length according to the width of the cabinet, so that one cabinet can be overlapped, which is convenient for standardized production, transportation and on-site installation.

Description of drawings

Fig. 1 is a main sectional view of a small bus bar seat.

Fig. 2 is a side view of the small bus bar seat.

Fig. 3 is a top view of the small bus bar seat.

Figure 4 is a schematic diagram of the installation of the small bus base and the installation guide rail.

In the figure: 1-left insulation module 2-right insulation module 3-conductive bar 4-insulation cover plate 5-pressure bearing plate 6-control small busbar 7-installation guide rail 8-pressing screw 9-fixing screw.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

See Figures 1-4, a semi-enclosed control small bus 6 connection bracket, including a small bus seat and a mounting guide rail 7, the small bus seat includes a conductive bar 3, an insulating module, a pressure plate 5, and an insulating cover 4. Conductive bar 3 is a U-shaped structure with threaded holes at both ends. The threaded holes and fixing screws 9 can be used as terminals for connecting secondary lines. The screw 9 is connected to the conductive bar 3 through a threaded hole, and the bottom end of the fixing screw 9 is inserted into the blind hole; the conductive bar 3 and the pressure-bearing plate 5 are arranged in the insulation module, and the pressure-bearing plate 5 is made of a copper plate with a threaded hole, and the screws are tightened 8 is threadedly connected with the pressure bearing plate 5, the bottom of the compression screw 8 compresses the control small busbar 6 on the conductive bar 3, the insulating cover plate 4 is set on the upper part of the compression screw 8, and is snap-connected with the insulation module, and the insulation cover The plate 4 can increase the safe insulation distance of the electrified body to the ground. The insulation module is provided with a groove for installing the conductive bar 3 and the pressure plate 5, and the U-shaped conductive bar 3 with threaded holes is limited in the groove in the insulation module, and the compression screw screwed on the pressure plate 5 8. Compress the small control busbar 6 on the conductive bar 3.

As shown in Figure 1, the conductive bar 3 is made of copper plate, preferably T2 copper plate, and the surface is treated with tin or silver plating to increase conductivity. There are two upper and lower planes at the end of the small control busbar 6, and it is connected with the conductive bar 3 in the form of surface-to-surface compression, which increases the contact area of the conductor, reduces the contact resistance, and increases the current carrying capacity. At least two small control busbars 6 are compressed on the conductive bar 3, as shown in Figure 1, two control small busbars 6 with different diameters are respectively inserted into the two ends of the insulation module, and are respectively fixed by compression screws 8 to realize two Control the electrical connection of the small busbar 6.

As shown in Figures 1-3, the insulation module includes a left insulation module 1 and a right insulation module 2, and the left insulation module 1 and the right insulation module 2 are plugged together. This structure is more convenient for the installation of the conductive bar 3 and the pressure bearing plate 5. A card slot is provided at the bottom of the insulation module for installing and fixing the installation guide rail 7 . There are more than two small busbar seats connected by buckle on the installation guide rail 7, as shown in Fig. 4, flexible assembly may be required.

As shown in Figure 1, the two ends of the insulating cover plate 4 are provided with hook-shaped structures, and the two ends of the top of the insulating module are provided with grooves matching the hook-shaped structures. The plate 4 covers the cavity to form a semi-enclosed isolation space, which increases the insulation distance between the charged body and the ground.

During actual construction, the control small busbar 6 is made into a standard length according to the width of the cabinet body, so as to realize one cabinet-one overlapping, which is convenient for standardized production, transportation and on-site installation.

The semi-enclosed control small busbar 6 connection bracket has the advantages of wide application range, large effective contact area, firm crimping, large safety distance, and convenient positioning.

Claims (8)

1. A semi-enclosed control small busbar connection bracket, characterized in that it comprises a small busbar seat and a mounting guide rail, and the described small busbar seat includes a conductive bar, an insulating module, a pressure plate, and an insulating cover plate, and the conductive bar is a U Shaped structure, both ends are provided with threaded holes, the top surface is a horizontal plane; both ends of the insulation module are provided with blind holes, the fixing screws are connected to the conductive row through the threaded holes, and the bottom of the fixing screw is inserted into the blind hole; the conductive row, pressure The board is set in the insulation module, the compression screw is threadedly connected with the pressure plate, the bottom of the compression screw presses the control small busbar on the conductive bar, the insulation cover is set on the upper part of the compression screw, and is snap-connected with the insulation module . 2. A semi-enclosed control small bus connection bracket according to claim 1, characterized in that the conductive bar is made of red copper plate, and the surface is treated with tin or silver plating. 3. A semi-enclosed control small bus connection bracket according to claim 1, characterized in that, the end of the control small bus has two planes up and down. 4. A semi-enclosed control small bus connection bracket according to claim 1, wherein the insulating module includes a left insulating module and a right insulating module, and the left insulating module and the right insulating module are plugged. 5 . The semi-enclosed control small bus connection bracket according to claim 1 , wherein more than two small bus seats are snap-connected on the installation guide rail. 6 . 6. A semi-enclosed control small bus connection bracket according to claim 1, characterized in that a slot is provided at the bottom of the insulating module. 7. A semi-enclosed control small bus connection bracket according to claim 1, characterized in that the two ends of the insulating cover are provided with hook structures, and the two ends of the top of the insulation module are provided with hook structures corresponding to the hook structures. The matching groove, the top of the insulating module is provided with a cavity for accommodating the compression screw, and the insulating cover plate covers the cavity. 8. A semi-enclosed control small busbar connection bracket according to claim 1, wherein at least two control small busbars are compressed on the conductive bar.