CN214044806U - Laying combined equipment for connecting indoor cable shaft and outdoor cable trench of transformer substation - Google Patents

Abstract

The utility model relates to a lay combination equipment that is used for transformer substation to connect indoor cable shaft and outdoor cable pit, draw down piece including supporting mechanism, equipotential copper bar, 380V post insulator and ground connection. The supporting mechanism comprises a supporting frame arranged at a hole at the bottom of the cable shaft. The support frame includes a support piece that sets gradually from a left side to the right side, and each support piece is all placed along the fore-and-aft direction, and connects gradually b stands after to in the past on every support piece. Each stand all places along vertical direction, and each stand of same left right position department passes through the cross arm subassembly and links to each other. The cross arm subassembly includes the c cross arms that set gradually from the top down, and each cross arm all places along the fore-and-aft direction. The equipotential copper bar is isolated and fixed with the upright post through a 380V post insulator. And the equipotential copper bar is connected with a main grounding grid of the transformer substation by the grounding down-leading piece. The device can solve the problems of cable laying fixation, equipotential grounding and the like of indoor and semi-indoor substation outdoor cable trench-to-home connection of cable shafts.

Description

Laying combined equipment for connecting indoor cable shaft and outdoor cable trench of transformer substation

Technical Field

The utility model relates to a cable laying technical field of transformer substation, concretely relates to a lay combination equipment that is used for transformer substation to connect indoor cable shaft and outdoor cable pit.

Background

With the shortage of urban land, the transformer stations increasingly adopt the indoor and semi-indoor building form. The cables in the station are mostly laid in cable trenches in outdoor fields, and cross-layer switching is required to be completed through cable shafts in multi-layer buildings. The cable trench is basically arranged below the ground and is in a vertical relation with the cable shaft space, and a height difference exists in the position. The existing cable laying mode of the transformer substation has the following defects: firstly, the method is extensive and cannot provide a fixed binding point for cable steering; secondly, the effective laying distance of the multilayer cables in steering cannot be guaranteed; no equipotential laid copper bar is available, which is not beneficial to controlling the shielding and grounding of the cable; fourthly, the workload of installing the bracket is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lay combination equipment for transformer substation connects indoor cable shaft and outdoor cable pit, this equipment can solve indoor and semi-indoor transformer substation outdoor cable pit and link up cable shaft's cable laying fixed and equipotential ground connection scheduling problem of registering one's residence.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a lay combination equipment that is used for transformer substation to connect indoor cable shaft and outdoor cable pit, includes supporting mechanism, equipotential copper bar, 380V post insulator and ground connection and draws down the piece.

Specifically, the supporting mechanism comprises a supporting frame arranged at a bottom opening of the cable shaft. The support frame includes a support piece that sets gradually from a left side to the right side, and each support piece is all placed along the fore-and-aft direction, and connects gradually b stands after to in the past on every support piece. Each stand all places along vertical direction, and each stand of same left right position department passes through the cross arm subassembly and links to each other. The cross arm subassembly includes the c cross arms that set gradually from the top down, and each cross arm all places along the fore-and-aft direction. Wherein a, b and c are all positive integers not less than 2. And the equipotential copper bar is isolated and fixed with the upright post through a 380V post insulator. And the grounding down piece connects the equipotential copper bar with a main grounding grid of the transformer substation.

Further, a fixing frame is embedded in the edge of the bottom opening of the cable shaft; the support frame is welded on the fixed frame; the fixed frame and the supporting piece are both made of channel steel.

Furthermore, the upright posts are made of No. 7 angle steel.

Further, the stand passes through the bolt with the cross arm and can dismantle continuously, just connection slot hole has all been seted up on stand and the cross arm.

Furthermore, the cross arm is provided with a long hole for fixing and binding the cable.

Compared with the prior art, the utility model has the advantages that:

(1) a lay combination equipment for transformer substation connects indoor cable shaft and outdoor cable pit, its function is complete, not only for the cable switching is fixed provides the ligature point, still divides cable shaft bottom entrance to a cave into a plurality of regions, has guaranteed that cable subregion layering lays, has mated insulating shielding copper bar simultaneously, makes things convenient for secondary equipotential ground.

(2) A lay combination equipment for transformer substation connects indoor cable shaft and outdoor cable pit, its is nimble reliable, connection slot hole has all been seted up to cross arm and stand for the cross arm of ligature cable passes through the bolt fastening on the stand, through connecting the slot hole, can adjust the position, arrange the position according to the cable pit support, the adjustment cross arm height guarantees that the cable turns to smooth transition.

(3) According to the requirement of 25 electric power engineering measures of the State energy agency, a secondary equipment room of a transformer substation needs to be provided with an equipotential copper bar grounding grid, and the secondary equipment room is reliably connected with a main grounding grid at a channel inlet. The utility model discloses utilize post insulator to be 100mm along the fixed cross-section of stand²The copper bar is provided with a grounding down piece which is grounded with one point of the main grounding grid, and an effective grounding point is provided for the secondary equipment of the transformer substation and the cable shielding layer.

(4) Lay combination equipment size and cable shaft and match, through bolt fastening cross arm and stand, through welded fastening built-in fitting and support frame, the surface does not have any exposed screw, whole succinctly generous, the installation is simple.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a view from A-A direction of the present invention;

fig. 3 is a view from B-B direction of the present invention.

Wherein:

1. building outer wall, 2, cable shaft, 3, support frame, 4, stand, 5, cross arm, 6, ground connection draws down the piece, 7, equipotential copper bar, 8, post insulator, 9, apron.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

the laying combination equipment for connecting the indoor cable shaft and the outdoor cable trench of the transformer substation, which is shown in fig. 1, comprises a supporting mechanism, an equipotential copper bar 7, a 380V post insulator 8 and a grounding down piece 6. The supporting mechanism comprises a supporting frame 3 arranged at a hole at the bottom of the cable shaft 2. The laying of the cable needs to meet the following conditions: firstly, power cables and control cables need to be effectively and reliably laid in a cable shaft from an outdoor cable trench; secondly, grounding the cable shielding layer to an equipotential copper bar which requires matching insulation; and thirdly, the equipotential copper bars need to be effectively connected with the main grounding grid of the transformer substation at the indoor and outdoor interface. Lay the combination equipment and satisfy above-mentioned condition.

Lay combination equipment be applicable to the outdoor cable of whole family or half indoor transformer substation and go into the switching of family and go into the cable shaft, should lay combination equipment and install in 2 below of cable shaft, the cable pit entrance. As shown in fig. 1, the right side of the building outer wall 1 is a cable shaft 2. And a hole is formed in the bottom of the cable shaft 2 and is communicated with the cable trench, and channel steel is embedded in the edge of the hole in the bottom of the cable shaft. The top of the cable channel for entering the house is provided with a cover plate 9. The support frame 3 is welded on the embedded channel steel at the edge of the opening at the bottom of the cable shaft. As shown in fig. 2 and 3, the support frame 3 includes 3 support members, and one support member is respectively disposed at two sides and the middle of the bottom opening of the cable shaft 2. The support piece adopts No. 8 channel steel. Stand 4 adopts No. 7 angle steels, and the long limit welded fastening of the channel-section steel that the support piece adopted, the supporting 3 spinal branch posts 4 of equidistance on the channel-section steel that every support piece adopted totally 9. The cross arm 5 is fixed to the column 4 by bolts. Three cross arms 5 are equidistantly matched at the same height of the upright post 4, so that the cable in the cable shaft 2 can be partitioned and fixed and can be turned conveniently, and the inner space is not overcrowded.

The equipotential copper bar 7 is formed by overlapping bare copper bars of 25x4mm2 and is isolated and fixed with the upright post 4 through a 380V post insulator 8. The grounding down-leading piece 6 adopts 4 bare copper bars of 12.5x4mm2, one end of the bare copper bar is connected with the equipotential copper bar 7, and the other end of the bare copper bar is led to the main grounding grid of the transformer substation. The grounding down-lead piece 6 tightly connects the equipotential copper bar 7 with the main grounding grid of the transformer substation, meets the requirement of 25 electric power engineering countermeasures according to the State energy agency, and provides an effective grounding point for secondary equipment and a cable shielding layer of the transformer substation.

Further, the upright post 4 is detachably connected with the cross arm 5 through a bolt. The upright post 4 and the cross arm 5 are both provided with connecting long holes, the upright post 4 and the cross arm 5 are fixed through bolts and the connecting long holes, and the span of the cross arm can be adjusted according to the arrangement condition of the external cable trench support.

Furthermore, the cross arm 5 is provided with a long hole for fixing and binding cables, so that the cables can be conveniently fixed and bound.

To sum up, the utility model has the advantages of the installation is convenient, be convenient for cable laying, provide effective shielding ground point, succinct big side. The utility model discloses set up the fixed ligature of a plurality of cable and use the slot hole on the cross arm, provide the ligature point for the cable switching is fixed to through a plurality of cross arms that set gradually from left side right side, from the top down, from left side right side, from a plurality of stands that set gradually backward forward, divide the entrance to a cave in the bottom of the cable shaft into a plurality of regions, guarantee the subregion and lay, insulating shielding equipotential copper bar has been mated simultaneously, makes things convenient for secondary equipotential ground. The utility model discloses a cross arm for ligature cable passes through the bolt fastening on the stand, and the position is adjustable, can arrange the position according to the cable pit support, and adjustment cross arm height guarantees that the cable turns to smooth transition. The utility model discloses utilize 380V insulator to be 100mm along the fixed cross-section of stand²The copper bar is provided with a grounding down piece which is grounded with one point of the main grounding grid, and an effective grounding point is provided for the secondary equipment of the transformer substation and the cable shielding layer.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (5)

1. The utility model provides a lay combination equipment that is used for indoor cable shaft of transformer substation connection and outdoor cable pit which characterized in that: the grounding device comprises a supporting mechanism, an equipotential copper bar, a 380V post insulator and a grounding down piece;

the supporting mechanism comprises a supporting frame arranged at a hole at the bottom of the cable shaft; the supporting frame comprises a supporting pieces which are sequentially arranged from left to right, each supporting piece is placed along the front-back direction, and b upright posts are sequentially connected to each supporting piece from front to back; each upright post is arranged along the vertical direction, and the upright posts at the same left and right positions are connected through a cross arm component; the cross arm assembly comprises c cross arms which are sequentially arranged from top to bottom, and all the cross arms are placed along the front-back direction; wherein a, b and c are positive integers not less than 2; the equipotential copper bar is isolated and fixed with the upright post through a 380V post insulator; and the grounding down piece connects the equipotential copper bar with a main grounding grid of the transformer substation.

2. A laying assembly for a substation connecting an indoor cable shaft with an outdoor cable trench according to claim 1, characterised in that: a fixing frame is embedded in the edge of the opening at the bottom of the cable shaft; the support frame is welded on the fixed frame; the fixed frame and the supporting piece are both made of channel steel.

3. A laying assembly for a substation connecting an indoor cable shaft with an outdoor cable trench according to claim 1, characterised in that: the upright post is made of No. 7 angle steel.

4. A laying assembly for a substation connecting an indoor cable shaft with an outdoor cable trench according to claim 1, characterised in that: the stand passes through the bolt with the cross arm and can dismantle continuously, just connection slot hole has all been seted up on stand and the cross arm.

5. A laying assembly for a substation connecting an indoor cable shaft with an outdoor cable trench according to claim 1, characterised in that: and the cross arm is provided with a long hole for fixing and binding the cable.

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