CN216819348U

CN216819348U - Vertically and horizontally cable channel vertical crossing structure

Info

Publication number: CN216819348U
Application number: CN202123101930.0U
Authority: CN
Inventors: 张涵宁; 唐剑潇; 李春良; 刘辉; 李生茂
Original assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Current assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-24
Anticipated expiration: 2031-12-06

Abstract

The utility model provides a vertical and horizontal cable channel three-dimensional crossing arrangement structure which comprises a section of crossed cable open trench, two sections of deepened crossed cable trenches, inter-trench cable buried pipes and other parts. The through cable open channel is in a conventional cable channel form. Each group of deepened crossing cable trenches consists of a cushion layer, steps, a water passing groove, a rainwater grate and deformation joints, and are arranged on two sides of the crossed cable open trench: one end of the cable is communicated with the bottom of the cable open ditch through a cable buried pipe; the other end of the cable is extended to the direction far away from the open ditch of the cable to be passed through after the section is reduced to the required net height by stepping. The stepping provides net-depth transition for deepening the section cable trench and realizes cable turning. Compared with the prior art, the utility model meets the latest design requirement; the crossing problem that the cables are laid at the crossing positions in the branch channels is solved; the node is suitable for any channel size; the installation, operation and maintenance comfort level and efficiency are improved, and the method has popularization value in the aspects of transformer substation engineering cable trench arrangement and node design.

Description

Vertically and horizontally cable channel vertical crossing structure

Technical Field

The utility model belongs to the technical field of electric power facilities, and particularly relates to a transverse and longitudinal cable channel three-dimensional crossing structure in alternating current and direct current power transmission and transformation engineering.

Background

In the past transformer substation and converter station engineering, a high-voltage power cable and a low-voltage control cable are laid in a common channel. In order to avoid ignition of a control cable and expansion of accidents after a power cable is ignited, the national grid company extra-high voltage engineering department publishes 'New extra-high voltage substation cable fire design promotion measure discussion meeting Lenovo Congress', requirements in the Lenovo Congress, in 11 months of 2019: the power cable of 10 kilovolt and above should not be laid with the low-voltage cable in the same ditch, and should be directly buried or laid separately in the ditch. The conventional cable co-channel form has failed to meet the above requirements. And high-voltage and low-voltage cables are laid in different ditches, so that the situation that the cable ditches are crossed in plane arrangement is difficult to avoid.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vertical and horizontal cable channel three-dimensional crossing arrangement structure, the node structure is simple and clear, the crossing problem of high and low voltage cables laid at the crossing part in different channels is solved, the cable laying and operation and maintenance are convenient, the operation efficiency is improved, and the practicability is high.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a violently indulge cable channel flyover crossing structure, includes one section and is crossed the cable pit, it includes channel bottom plate, lateral wall, ditch bottom water drainage tank, ordinary apron and bed course to be crossed the cable pit, its characterized in that: the cable trench comprises a plurality of sections of deepened crossing cable trenches, wherein the two sections of deepened crossing cable trenches are respectively arranged at two sides of the crossed cable trench, one end of each section of deepened crossing cable trench is communicated with the bottom of the crossed cable trench through a cable buried pipe, the other end of each section of deepened crossing cable trench extends in the direction far away from the crossed cable trench after the height of the section of each section of deepened crossing cable trench is reduced to the required net height, and the depth of each section of deepened crossing cable trench is arranged at the side of the crossed cable trench to meet the dual requirements of the net height required by cable laying in the trench and the net height required by cable buried pipes under the crossed cable trench.

Further, the deepened crossing cable trench gradually reduces the height of the section through the steps, and the requirement of the turning radius of the cable is met.

Further, the step single-step size is 300mm in width and 150mm in height and extends to the bottom of the ditch.

Furthermore, the deepened crossing cable trench is provided with a trench bottom drainage groove, a water collecting pit is arranged at the deepest part of the trench bottom, and a drainage pipe is led to the nearby rainwater inspection well.

Furthermore, the buried pipe of the inter-ditch cable can adopt a galvanized steel pipe, and for the engineering requiring a single-core cable, an antimagnetic stainless steel pipe is adopted.

Furthermore, a water passing groove is formed in the position, adjacent to the first cover plate, of the cable trough to be crossed.

The utility model has the beneficial effects that:

(1) the utility model can realize the ditch-divided laying of high-voltage and low-voltage cables, is suitable for the latest design requirement, can effectively avoid the ignition of the control cable after the high-voltage power cable is on fire, enlarge accidents and improve the stability and the power supply reliability of a power grid system;

(2) the utility model solves the crossing problem of laying high-voltage and low-voltage cables at the crossing position by locally deepening and crossing the cable trench and adopting a mode of connecting the trenches by the buried cable pipes, can adapt to any trench size, has popularization value in the aspects of extra-high voltage alternating current and direct current engineering cable trench arrangement and node design, and has wide application prospect;

(3) the utility model fully considers the working difficulty and comfort level in the construction and operation and maintenance stages, does not need special construction process, improves the cable laying efficiency and the operation and maintenance efficiency, and has stronger practicability, economic benefit and social benefit.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a lower plan view of the cover plate of the present invention;

FIG. 3 is a cross-sectional view of the present invention taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view of the deepened crossing cable trench taken along line B-B of the present invention;

in the figure: 1-a cable trench to be crossed; 2, deepening a spanning cable trench; 3, passing through a water tank; 4, stepping; 5, burying a cable; 6, deformation joint; 7, cushion layer; 8, rainwater grate; 9-a trench bottom drainage channel; 10-a sump.

Detailed Description

The utility model will be further described with reference to fig. 1-4.

As shown in attached figures 1-4, the utility model provides a vertical and horizontal cable channel crossing structure, which comprises a section of crossed cable channel, two sections of deepened crossed cable channels, a cable buried pipe between the channels, a water passing groove, steps, deformation joints, a cushion layer, a rainwater grate, a drainage groove at the bottom of the channel, a water collecting pit and other components.

And in consideration of the workload and difficulty of cable laying in the later period, selecting a low-voltage control cable trench with larger cable quantity as a crossed cable trench 1, and selecting a high-voltage power cable trench with smaller cable quantity as the deepened crossing cable trench 2. The size of each cable trench is determined according to the actual cable laying requirement. The deepened crossing cable trench 2 is arranged on two sides of the passed-through cable trench 1, and the depth of the deepened crossing cable trench 2 is required to meet the dual requirements of the net height required by laying of the high-voltage cable and the net height required by the buried pipe 5 of the cable below the passed-through cable trench 2.

Referring to fig. 3, the deepened crossing cable trench 2 is formed by using a cast-in-place concrete cushion 7, the thickness of the cast-in-place concrete cushion is 100mm, and each side of the cast-in-place concrete cushion is larger than the size of the bottom plate by 100 mm. And after the cushion layer 7 is poured, pouring a deepened crossing cable trench 2 bottom plate, synchronously pouring trench bottom steps 4, and pouring a deepened crossing cable trench 2 bottom plate to leave deformation joints 6 at appropriate positions after the section height is gradually reduced to the required net height through the steps 4.

The step 4 can provide the net depth transition for deepening and crossing the cable trench 2, and the vertical space required by the turning radius of the high-voltage cable is utilized to meet the requirement of the turning radius of the cable in the trench. In order to facilitate cable laying and increase the walking comfort level of operation and maintenance, the step 4 single-step size is 300mm wide and 150mm high and extends to the bottom of the ditch.

Set up cement mortar ditch bottom water drainage tank 9 at the bottom of cable pit 2 is strideed across in the deepening, set up sump pit 10 and draw the drain pipe to nearby rainwater inspection shaft outward at the deepest of ditch bottom to prevent cable pit ponding.

When the deepening stridees across 2 trench walls of cable trench, set up the intertrack cable buried pipe 5 at suitable height, pour deepening to stride across 2 trench walls of cable trench and leave in the suitable position after reducing the cross-sectional height gradually to required net height through marking time 4 and establish movement joint 6 to coordinate unanimously with bottom plate expansion joint position.

In the embodiment shown in fig. 3, the cable laying pipe 5 is laid at the bottom of the cable trench 1 to be traversed, and is not supposed to turn. The two sides of the deepened spanning cable trench 2 are flush with the inner wall, and measures are taken to protect the notch so as to prevent the cable from being scratched in the laying process. The middle of the cable embedded pipe 5 is not provided with a welding port, the inner side is smooth, and no burrs or other sharp foreign matters exist, so that the cable is prevented from being damaged. The cable buried pipe 5 can adopt a galvanized steel pipe, and for the engineering requiring a single-core cable, an antimagnetic stainless steel pipe is adopted.

After the cable buried pipe 5 is laid and deepened to cross the wall of the cable trench 2, construction is carried out on the passed cable trench 1, and the passed cable trench 1 is in a conventional cable channel form.

A water passing groove 3 is arranged under a first cover plate adjacent to the crossed cable trench 1 of the deepened crossing cable trench 2, so that local water accumulation of each cable trench at the site of the plane crossing is effectively prevented. In the embodiment shown in the attached figure 4, the elevation of the bottom plate of the water passing groove 3 is adapted to the elevation of a site, and the rainwater grates 8 are fixed on two sides of the water passing groove 3 to prevent particles such as broken stones in the site from accumulating in the water passing groove 3 to cause the failure of the water passing function.

After the construction of the passed cable trench 1, the deepened crossing cable trench 2 and the water passing groove 3 is completed, the subsequent process flows of cable bracket installation, cable laying and the like can be carried out.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the utility model concepts of the present invention in the technical scope of the present invention.

Claims

1. The utility model provides a violently indulge cable channel flyover crossing structure, includes one section and is crossed the cable pit, it includes channel bottom plate, lateral wall, ditch bottom water drainage tank, ordinary apron and bed course to be crossed the cable pit, its characterized in that: the buried type through cable trench is characterized by further comprising two sections of buried type through cable trenches, wherein the two sections of buried type through cable trenches are arranged on two sides of the cable trench to be penetrated respectively, one end of each section of the buried type through cable trench is communicated with the bottom of the cable trench to be penetrated, the other end of each section of the buried type through cable trench is extended towards the direction far away from the cable trench to be penetrated after the section height is reduced to the required net height, and the depth arranged on the side of the cable trench to be penetrated meets the dual requirements of the net height required by cable laying in the trench and the net height required by cable buried pipes under the cable trench to be penetrated.

2. The criss-cross crossing structure of the transverse and longitudinal cable channels according to claim 1, wherein: the deepened crossing cable trench gradually reduces the height of the section through the steps.

3. The criss-cross crossing structure of the transverse and longitudinal cable channels according to claim 2, wherein: the step single-step size is 300mm in width and 150mm in height and extends to the bottom of the ditch.

4. The criss-cross crossing structure of the transverse and longitudinal cable channels according to claim 1, wherein: the deepened crossing cable trench is provided with a trench bottom drainage groove, the deepest part of the trench bottom is provided with a water collecting pit, and a drainage pipe is led out to a nearby rainwater inspection well.

5. The criss-cross crossing structure of the transverse and longitudinal cable channels according to claim 1, wherein: the cable buried pipe adopts a galvanized steel pipe, and adopts an antimagnetic stainless steel pipe for the engineering requiring a single-core cable.

6. The criss-cross crossing structure of the transverse and longitudinal cable channels according to claim 1, wherein: and a water passing groove is arranged at the position, adjacent to the first cover plate, of the cable trench to be penetrated.