Recycled concrete base prefabricated assembly cable trench

Abstract

The utility model discloses a kind of recycled concrete base prefabricated assembly type cable trench, including ditch body, cover plate, cable support and cable pipe are equipped in ditch body inside, one end is provided with tenon, the other end is provided with adaptive recess, outside has drain groove, heat pipe is equipped thereon, ditch body uses high-performance concrete containing steel fiber and silica ash, inside and outside have waterproof and anticorrosive coating;There is water stop between cover plate and ditch body, there is water-collecting well and drain pipe in drain groove;Heat pipe is filled with heat-conducting silica gel;Cable support is arc-shaped fixing seat with rubber buffer pad;There is sealing pad at the connecting place of tenon and recess, and there is lifting ring on the top of ditch body. It is high in strength, waterproof, anticorrosive and good in heat dissipation, convenient to install and maintain, and suitable for various scenes.

Description

Technical Field

[0001] This utility model relates to the field of power engineering infrastructure technology, specifically to a prefabricated cable trench based on recycled concrete. Background Technology

[0002] In power transmission and distribution systems, cable trenches are crucial infrastructure for protecting the safe operation of cables, and are widely used in urban power grids, industrial parks, residential communities, and other scenarios. Traditional cable trenches mostly employ on-site cast-in-place concrete structures, which suffer from problems such as long construction periods, significant susceptibility to environmental influences, and difficulty in quality control.

[0003] While existing precast cable trenches have improved construction efficiency, they still have many shortcomings: First, their structural strength is insufficient, and they are prone to cracking under long-term soil pressure and ground loads; second, their waterproof performance is poor, and rainwater seepage can cause cables to become damp and age, affecting their service life; third, their heat dissipation is poor, and the heat generated by the cables can easily lead to safety hazards; fourth, their corrosion resistance is weak, and they are easily corroded in special environments such as saline-alkali land and industrial areas; and fifth, the internal cable fixing and maintenance are inconvenient, and they lack a flexible wiring adjustment structure.

[0004] Therefore, it is necessary to design a prefabricated cable trench based on recycled concrete to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a prefabricated cable trench based on recycled concrete to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A prefabricated cable trench based on recycled concrete includes a trench body and a cover plate. The trench body is provided with cable supports and cable pipes inside. One end of the trench body is provided with a tenon, and the other end is provided with a groove that matches the tenon. The outside of the trench body is provided with a drainage groove, and the trench body is provided with a heat dissipation pipe.

[0008] Furthermore, the trench body is precast with high-performance concrete, which contains 5%-8% steel fiber and 3%-5% silica fume. The sidewall thickness of the trench body is 15-20cm, and the bottom thickness is 20-25cm. The outer side of the trench body is coated with an asphalt waterproof coating, and the inner side is coated with an epoxy resin anti-corrosion coating. The thickness of both the asphalt waterproof coating and the epoxy resin anti-corrosion coating is 0.5-1mm.

[0009] Furthermore, a water-swellable sealing strip is provided at the connection between the cover plate and the ditch body; a water collection well is provided at intervals of 5-8m in the drainage ditch, and a drainage pipe is connected to the bottom of the water collection well.

[0010] Furthermore, the heat dissipation pipe is a PVC pipe with a diameter of 5-8cm, and the heat dissipation pipe is filled with thermally conductive silicone.

[0011] Furthermore, the cable bracket is an arc-shaped cable fixing seat, and a rubber buffer pad is provided on the inner side of the arc-shaped cable fixing seat.

[0012] Furthermore, a rubber sealing gasket is provided at the connection between the tenon and the groove; a lifting ring is provided on the outer side of the top of the trench body, the lifting ring is made of round steel with a diameter of 10-12mm and is integrally cast with the trench body concrete.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model, through the design of a prefabricated cable trench based on recycled concrete, achieves the following effects: 1. The prefabricated trench body, made of high-performance concrete incorporating steel fibers and silica fume, increases compressive strength by over 30%, enhances crack resistance, and can withstand soil pressure and ground loads for extended periods, solving the problem of easy cracking in traditional cable trenches; 2. A water-swellable sealing strip is installed at the connection between the cover plate and the trench body, which, combined with the asphalt waterproof coating on the outside of the trench body, effectively prevents rainwater infiltration; the inclined bottom design, along with the drainage trough, collection well, and drainage pipe, forms an efficient drainage system, quickly draining accumulated water and preventing cables from getting damp; 3. Heat dissipation pipes are pre-embedded in the side walls of the trench body and filled with thermally conductive silicone, which can quickly conduct heat from inside the trench to the outside; the breathable cover plate and vents promote air circulation. 4. The epoxy resin anti-corrosion coating on the inside of the trench can resist chemical corrosion, and the asphalt waterproof coating on the outside can prevent groundwater penetration, extending the service life by 2-3 times in complex environments such as saline-alkali land and industrial areas, and reducing maintenance costs; 5. The cable bracket adopts a detachable design, which can be flexibly adjusted according to the cable specifications; the trench body is spliced ​​with tenons and grooves and rubber sealing gaskets, which improves the installation efficiency by 50%; the lifting ring design facilitates transportation and hoisting, and the whole structure does not need to be disassembled for later maintenance, reducing the difficulty of operation and maintenance; 6. The prefabricated assembly structure is produced in a standardized factory and can be quickly assembled on site through hoisting and splicing, which greatly shortens the construction cycle and reduces the amount of wet work on site. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a side view of the structure of this utility model.

[0018] In the diagram: 1. Trench body; 11. Asphalt waterproof coating; 12. Epoxy resin anti-corrosion coating; 2. Cover plate; 3. Cable bracket; 4. Cable conduit; 5. Tenon; 6. Groove; 7. Drainage trough; 8. Heat dissipation pipe; 9. Lifting ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0021] Example 1

[0022] This embodiment provides a high-performance precast concrete cable trench suitable for urban power grids. Its structure includes a trench body 1 and a cover plate 2. The trench body 1 is provided with a cable support 3 and a cable pipe 4 inside. One end of the trench body 1 is provided with a tenon 5, and the other end is provided with a groove 6 that matches the tenon 5. The outside of the trench body 1 is provided with a drainage groove 7, and a heat dissipation pipe 8 is pre-embedded in the side wall of the trench body 1.

[0023] Example 2

[0024] Based on Example 1, this embodiment further specifies that the trench body 1 is precast with C40 high-performance concrete mixed with 6% steel fiber and 4% silica fume, with a sidewall thickness of 18cm and a bottom thickness of 22cm. The outer side of the trench body 1 is sprayed with a 0.8mm thick asphalt waterproof coating 11, and the inner side is coated with a 0.8mm thick epoxy resin anti-corrosion coating 12. A 20mm wide water-swellable sealing strip 21 is embedded at the connection between the cover plate 2 and the trench body 1, with an expansion ratio ≥250%.

[0025] Example 3

[0026] Based on Example 1, this embodiment further defines the drainage trough 7 as having a U-shaped cross-section, with a width of 15cm and a depth of 10cm. A 30cm diameter water collection well 71 is installed every 6m inside, and the bottom of the water collection well 71 is connected to a 110mm diameter PVC drainage pipe 72 with a slope of 3‰. The heat dissipation pipe 8 is a 6cm diameter PVC pipe, filled with thermally conductive silicone 81 with a thermal conductivity ≥0.8W / (m·K), and arranged in two layers at 50cm intervals along the height of the sidewall of the trough 1.

[0027] Example 4

[0028] Based on Example 1, this embodiment further defines the cable bracket 3 as an arc-shaped cable fixing seat with an arc radius of 5cm. A 3mm thick nitrile rubber buffer pad 31 is pasted on the inner side and fixed to the pre-drilled mounting holes on the inner side of the trench body 1 by bolts. A 5mm thick nitrile rubber sealing gasket 51 with a compression rate ≥30% is clamped at the connection between the tenon 5 and the groove 6. Four lifting rings 9 are symmetrically arranged on the outer side of the top of the trench body 1. They are made of Q235 round steel with a diameter of 11mm and are integrally cast with the concrete of the trench body 1.

[0029] The workflow of this utility model is as follows: In the factory, the trench body 1 is cast in one go using standardized molds. High-performance concrete (mixed with 5%-8% steel fiber and 3%-5% silica fume) is prepared according to the design ratio. The steel reinforcement skeleton is placed into the mold, and the trench body 1 is cast with tenons 5, grooves 6, drainage channels 7, and pre-reserved installation holes for heat dissipation pipes 8. Simultaneously, cover plates 2 with ventilated holes are prefabricated. After prefabrication, an asphalt waterproof coating 11 is sprayed on the outside of the trench body 1, and an epoxy resin anti-corrosion coating 12 is applied to the inside. Heat dissipation pipes 8 are installed in the pre-embedded holes on the side wall of the trench body 1 and filled with thermally conductive silicone 81. Cable brackets 3 (rubber buffer pads 31 are pasted on the inside of the arc-shaped fixing seat) and cable pipes 4 are installed on the inside of the trench body 1. Rubber sealing gaskets 51 are pasted on the surface of the tenons 5, and water-swellable waterstop strips 21 are installed on the edge of the cover plate 2. The prefabricated trench body is lifted into the foundation pit using lifting equipment through the lifting rings 9 at the top of the trench body 1, so that the tenons of adjacent trench bodies are aligned. 5. Align precisely with groove 6, and compress and seal with rubber sealing gasket 51; adjust the slope of trench 1 to 2%-3%, ensuring that drainage trough 7 is inclined towards collection well 71, and install collection wells 71 at 5-8m intervals in drainage trough 7. Connect the bottom of collection well 71 to drainage pipe 72 to ensure smooth drainage; check the sealing of the contact part between trench 1 and foundation, and perform waterproofing treatment if necessary; pass the cable through cable pipe 4 and place it on the arc-shaped fixing seat of cable bracket 3, with rubber buffer pad 31 to buffer cable vibration; after laying, cover with cover plate 2, so that the water-swellable sealing strip 21 fits tightly with trench 1; regularly check the thermal conductivity of heat dissipation pipe 8, the smoothness of drainage system, and the sealing of cover plate 2; if maintenance is required, partially lift cover plate 2 with lifting ring 9, adjust the position of cable bracket 3, or replace damaged parts.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated cable trench based on recycled concrete, characterized in that: Includes a trench (1) and a cover plate (2). The trench (1) is equipped with a cable bracket (3) and a cable pipe (4) inside. One end of the trench (1) is provided with a tenon (5), and the other end is provided with a groove (6) that matches the tenon (5). The outside of the trench (1) is provided with a drainage groove (7), and the trench (1) is provided with a heat dissipation pipe (8).

2. The prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: The trench (1) is precast with high-performance concrete, which contains 5%-8% steel fiber and 3%-5% silica fume. The sidewall thickness of the trench (1) is 15-20cm and the bottom thickness is 20-25cm.

3. The prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: The trench (1) is provided with an asphalt waterproof coating (11) on the outside and an epoxy resin anti-corrosion coating (12) on the inside. The thickness of the asphalt waterproof coating (11) and the epoxy resin anti-corrosion coating (12) is 0.5-1mm.

4. The prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: The connection between the cover plate (2) and the ditch body (1) is provided with a water-swellable water-stop strip.

5. A prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: Water collection wells are provided at intervals of 5-8m in the drainage trough (7), and a drainage pipe is connected to the bottom of the water collection well.

6. The prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: The heat dissipation pipe (8) is a PVC pipe with a diameter of 5-8cm, and the heat dissipation pipe (8) is filled with thermally conductive silicone.

7. A prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: The cable bracket (3) is an arc-shaped cable fixing seat, and a rubber buffer pad is provided on the inner side of the arc-shaped cable fixing seat.

8. A prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: A rubber sealing gasket is provided at the connection between the tenon (5) and the groove (6).

9. A prefabricated cable trench based on recycled concrete according to claim 1, characterized in that: A lifting ring is provided on the outer side of the top of the trench (1). The lifting ring is made of round steel with a diameter of 10-12mm and is cast in one piece with the concrete of the trench (1).

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