Civil engineering structure of power transformation and distribution engineering cable trench

Abstract

The utility model provides a civil engineering structure of a power transformation and distribution project cable trench, which is arranged under the ground of a power distribution room and comprises a main cable trench and an auxiliary cable trench which are adjacently arranged, a concrete pier is built between the main cable trench and the auxiliary cable trench, a reinforced concrete beam is erected at the top of the concrete pier, a cable bracket is erected in the main cable trench, and iron piece bulk samples I are pre-buried on two sides of the top of the main cable trench; an iron piece large sample II is pre-embedded in the top of the auxiliary cable trench, channel steel extending out of the upper portion of the ground is fixed to the top of the iron piece large sample II, and every two concrete piers are arranged at intervals so that the interiors of the main cable trench and the auxiliary cable trench can be communicated. The cable trench is simple in structure, reasonable in design, good in heat dissipation, capable of preventing water accumulation, convenient for cable laying and maintenance, high in safety coefficient, energy-saving and environment-friendly, and can be widely applied to construction of power distribution room cable trenches of medium and large power transformation and distribution projects; the purposes of tidy cable laying, good heat dissipation, water accumulation prevention, and improvement of power transformation and distribution equipment installation and cable laying work efficiency can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power engineering, and particularly relates to a civil engineering structure of a cable trench of a power transformation and distribution engineering. Background Art

[0002] In the field of power transformation and distribution engineering, medium and large power transformation and distribution engineering are characterized by large power capacity, many power transformation and distribution equipment, and many cables. In the process of implementing medium and large power transformation and distribution engineering, in order to realize the installation of power transformation and distribution equipment such as transformers, distribution cabinets, compensation cabinets and cable laying, a construction method is usually adopted to build a cable trench to install the power transformation and distribution equipment above the cable trench and lay the cables in the cable trench below the power transformation and distribution equipment. This construction method has many disadvantages such as difficulty in laying cables, poor heat dissipation, and poor subsequent maintenance work. This construction method can no longer meet the needs of medium and large power transformation and distribution engineering construction. Utility Model Content

[0003] In view of the defects of current power transformation and distribution project construction, such as difficulty in cable laying, disadvantageous heat dissipation and subsequent maintenance work, the utility model provides a civil engineering structure of a cable trench for power transformation and distribution projects, which can make the cable trench in the power transformation and distribution room have the functions of convenient cable laying, convenient maintenance, good heat dissipation and prevention of water accumulation.

[0004] This new application is realized through the following technical solutions:

[0005] A civil engineering structure of a cable trench for a power transformation and distribution project, which is arranged underground in a power distribution room, and includes a main cable trench and an auxiliary cable trench arranged adjacent to each other; a concrete pier is built between the main cable trench and the auxiliary cable trench, and a reinforced concrete beam is erected on the top of the concrete pier; the outer sides of the main cable trench and the auxiliary cable trench are reinforced with concrete;

[0006] A cable bracket is set up inside the main cable trench; iron sample I is pre-buried on both sides of the top; an iron sample II is pre-buried on the top of the auxiliary cable trench, and a channel steel is fixed on the top of the iron sample II, and the channel steel extends out of the upper part of the ground of the power distribution room;

[0007] The concrete piers are arranged at intervals of two, and the gaps between the concrete piers are communicated with the inside of the main cable trench and the auxiliary cable trench.

[0008] The working principle of the utility model is as follows:

[0009] The civil engineering structure of the utility model digs adjacent main cable trenches and auxiliary cable trenches in the land below the power distribution room, and a cable bracket for placing cables is arranged in the main cable trench to ensure that the cables are more than 100mm above the bottom of the main cable trench after laying, which is not only convenient for laying cables, but also convenient for later maintenance and heat dissipation. The cable bracket is galvanized and connected to the annular grounding trunk line of the power distribution room to form a closed grounding loop, and is treated with anti-rust paint for corrosion protection. Distribution cabinets, transformers and other equipment are installed above the auxiliary cable trench. The size of the central gap of the concrete pier between the main cable trench and the auxiliary cable trench is determined by the number of cables laid in the main cable trench and the auxiliary cable trench and the convenience of operation, and is distributed on the bottom of the cable trench according to actual conditions. The concrete piers are left empty to achieve the interconnection between the main cable trench and the auxiliary cable trench, so as to achieve the purpose of laying cables in the main cable trench and installing power distribution equipment in the auxiliary cable trench, and also achieve the goals of convenient cable laying, convenient maintenance and good heat dissipation. The pre-buried ironwork samples I and II on the top of the main cable trench and the auxiliary cable trench can be easily expanded. For example, channel steel is welded and fixed on the top of the ironwork sample II, and then various distribution cabinets, transformers, etc. are installed on the channel steel.

[0010] As a further improvement of the utility model, iron pieces are pre-buried on both sides of the main cable trench, and 2 to 4 layers of cable brackets are fixed on the iron pieces.

[0011] Multi-layer cable racks can better lay cables in layers. When the number of cables is too large, multi-layer laying is required to avoid the accumulation of multiple cables, which will affect later maintenance and heat dissipation.

[0012] As a further improvement of the utility model, a first water collection port is provided at the bottom of the main cable trench, and a second water collection port is provided at the bottom of the auxiliary cable trench. PVC pipes are installed in the first water collection port and the second water collection port for drainage.

[0013] As a further improvement of the utility model, the slopes in the first water collection port and the second water collection port are 5° to 10°.

[0014] Setting up water collection outlets at the bottom of the main cable trench and the auxiliary cable trench can prevent water accumulation, and the slope of the water collection outlet can enable better drainage of accumulated water.

[0015] As a further improvement of the present invention, the iron piece sample I is U-shaped as a whole, with a right triangle at the top and an inward hook at the bottom.

[0016] The iron sample I is made of 6mm diameter steel bars with inner hooks and a U-shaped pre-embedded iron piece at a right angle at the top, which is welded to a 100mm long and 5mm thick steel plate. Each iron sample I is pre-embedded at a spacing of 800mm, and is pre-embedded on the left and right sides of the top of the main cable trench before concrete pouring. After the concrete solidifies, it is welded to the L50×5 full-length angle steel, and is welded to the ring grounding trunk line of the transformer and distribution room using galvanized flat iron to form a closed grounding loop.

[0017] As a further improvement of the present invention, the iron piece sample II is U-shaped as a whole, with a rectangular top and an inwardly hooked bottom.

[0018] Ironwork sample II uses 6mm diameter steel bars to make U-shaped embedded ironwork with inner hooks and a flat top. The embedded ironwork is embedded at a center spacing of 800mm each. It is embedded in advance on the left and right sides of the top of the auxiliary cable trench before concrete pouring. After the concrete solidifies, it is welded with the vertical channel steel. The channel steel should be 50mm higher than the building ground, and the horizontal tolerance is not more than 1mm per meter. The spacing between the channel steels on both sides of the top of the auxiliary cable trench is selected according to the width of the distribution cabinet. After the vertical channel steel is welded, a galvanized flat iron is used to weld it to the ring grounding trunk line of the transformer and distribution room to form a closed grounding loop.

[0019] As a further improvement of the utility model, a cover plate is provided on the top of the main cable trench, and the cover plate is hinged to the angle steel fixed to the top of the iron sample I.

[0020] The cover plate is made of FRP grating. The specific method is to cut the width of the FRP grating into about 500mm and the length is based on the width of the main cable trench. The cut grating is installed on the angle steels on the left and right sides of the top of the main cable trench.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] 1. The utility model uses steel bars to make U-shaped embedded iron parts with inner hooks. After the iron parts are embedded in concrete, they are not easy to loosen and can be firmly fixed in the concrete, ensuring the stability of the welding of the angle steel and channel steel of the main cable trench and the auxiliary cable trench.

[0023] 2. The utility model sets concrete piers between the main cable trench and the auxiliary cable trench and distributes them on the bottom of the cable trench, leaving spaces between the concrete piers to realize the interconnection between the main cable trench and the auxiliary cable trench, so as to achieve the purpose of laying cables in the main cable trench and installing power transformation and distribution equipment in the auxiliary cable trench, thereby realizing the effects of convenient cable laying, convenient maintenance and good heat dissipation.

[0024] 3. The main cable trench cover of the utility model is conducive to the production of glass fiber reinforced plastic grating plates, and has the advantages of corrosion resistance, non-magnetic insulation, light weight, high strength, easy cutting and good heat dissipation.

[0025] 4. The utility model adopts direct connection to weld the cable support at the bottom layer of the main cable trench, which can reasonably utilize the structural space of the main cable trench and enable laying of more cables.

[0026] 5. The utility model has the advantages of simple structure, reasonable design, good heat dissipation, prevention of water accumulation, convenient cable laying, convenient maintenance, high safety factor, energy saving and environmental protection. It can be widely used in the construction of cable trenches in distribution rooms of medium and large-scale power transformation and distribution projects, and can achieve the goals of neat cable laying, good heat dissipation, prevention of water accumulation, and improvement of power transformation and distribution equipment installation and cable laying work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the civil engineering structure of the cable trench of the utility model.

[0028] Figure 2 It is a plan view of the power distribution room of the utility model.

[0029] Figure markings: 1-cable bracket, 2-cover plate, 3-iron model I, 4-reinforced concrete beam, 5-concrete pier, 6-channel steel, 7-iron model II, 8-concrete, 9-first water collection port, 10-second water collection port, 11-main cable trench, 12-auxiliary cable trench, 13-distribution room, 14-distribution cabinet, 15-gap, 16-iron model. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings. In the embodiments, unless otherwise specified, the technical means used are all conventional technical means in the art. Example 1

[0031] like Figure 1 The civil engineering structure of a cable trench of a power transformation and distribution project shown in the figure is arranged underground in a power distribution room 13, and includes a main cable trench 11 and an auxiliary cable trench 12 arranged adjacent to each other; a concrete pier 5 is built between the main cable trench 11 and the auxiliary cable trench 12, and a reinforced concrete beam 4 is erected on the top of the concrete pier 5; the outer sides of the main cable trench 11 and the auxiliary cable trench 12 are reinforced with concrete 8;

[0032] A cable support 1 is set up inside the main cable trench 11; iron sample I3 is pre-buried on both sides of the top; an iron sample II7 is pre-buried on the top of the auxiliary cable trench 12, and a channel steel 6 is fixed on the top of the iron sample II7, and the channel steel 6 extends out of the upper part of the ground of the power distribution room 13;

[0033] like Figure 2 As shown, the concrete piers 5 are arranged in pairs, and the gaps 15 between the concrete piers 5 are connected to the inside of the main cable trench 11 and the auxiliary cable trench 12.

[0034] A cover plate 2 is provided on the top of the main cable trench 11, and the cover plate 2 is hinged to the angle steel fixed on the top of the iron sample Ⅰ3.

[0035] The working principle of this embodiment is as follows:

[0036] The civil engineering structure of this embodiment is achieved by digging out adjacent main cable trenches 11 and secondary cable trenches 12 in the land below the power distribution room 15. A cable support 1 for placing cables is provided in the main cable trench 12 to ensure that the cables are more than 100 mm above the bottom of the main cable trench 11 after laying. This is not only convenient for laying cables, but also for later maintenance and heat dissipation. The cable support 1 is galvanized and connected to the annular grounding trunk line of the power distribution room to form a closed grounding loop, and is treated with anti-rust paint for corrosion protection. Distribution cabinets, transformers and other equipment are installed above the secondary cable trench 12. The central gap 15 of the concrete pier 5 between the main cable trench 11 and the secondary cable trench 12 is determined by the number of cables laid in the main cable trench 11 and the secondary cable trench 12 and the convenience of operation, and is distributed at the bottom of the cable trench according to actual conditions. There is a space between the concrete piers 5 to realize the interconnection between the main cable trench 11 and the auxiliary cable trench 12, so as to achieve the purpose of laying cables in the main cable trench 11 and installing power distribution equipment in the auxiliary cable trench 12, and also achieve the goal of convenient cable laying, convenient maintenance, and good heat dissipation. The pre-buried iron sample I3 and iron sample II7 on the top of the main cable trench 11 and the auxiliary cable trench 12 can be easily expanded. For example, a channel steel 6 is welded and fixed on the top of the iron sample II7, and then various distribution cabinets 14, transformers, etc. are installed on the channel steel 6. The cover plate 2 is made of glass fiber reinforced plastic grating plate. The specific method is to cut the width of the glass fiber reinforced plastic grating plate to about 500mm, and the length is based on the width of the main cable trench 11. The cut grating plate is installed on the angle steels on the left and right sides of the top of the main cable trench 11. Example 2

[0037] This embodiment is a further improvement made on the basis of Embodiment 1, and the details are as follows:

[0038] Iron pieces 16 are pre-buried on both sides of the main cable trench 11 , and 2 to 4 layers of cable supports 1 are fixed on the iron pieces 16 .

[0039] The working principle of this embodiment is the same as that of embodiment 1. The multi-layer cable bracket 1 can better lay cables in layers. When the number of cables is too large, multi-layer laying is required to avoid the accumulation of multiple cables, which affects the later maintenance and also affects the heat dissipation. Example 3

[0040] This embodiment is a further improvement made on the basis of Embodiment 2, and is specifically as follows:

[0041] A first water collection port 9 is provided at the bottom of the main cable trench 11, and a second water collection port 10 is provided at the bottom of the auxiliary cable trench 12. PVC pipes are installed in the first water collection port 9 and the second water collection port 10 for drainage.

[0042] The slope of the first water collection port 9 and the second water collection port 10 is 5°.

[0043] The working principle of this embodiment is the same as that of Embodiment 2. The water collection ports are arranged at the bottom of the main cable trench 11 and the auxiliary cable trench 12 to prevent water accumulation. The slope of the water collection ports can better discharge the accumulated water. Example 4

[0044] This embodiment is a further improvement made on the basis of Embodiment 3, and the details are as follows:

[0045] The iron piece sample Ⅰ3 is U-shaped as a whole, with a right triangle at the top and an inward hook at the bottom.

[0046] The ironwork sample II 7 is U-shaped as a whole, with a rectangular top and an inwardly hooked bottom.

[0047] The working principle of this embodiment is the same as that of the embodiment 3. The iron sample I3 is made of a 6mm diameter steel bar with an inner hook and a U-shaped pre-embedded iron piece at a right angle at the top, and is welded to a steel plate 100mm long and 5mm thick. Each iron sample I3 is pre-embedded at a spacing of 800mm, and is pre-embedded in advance on the left and right sides of the top of the main cable trench 11 before the concrete is poured. After the concrete solidifies, it is welded to the L50×5 full-length angle steel, and is welded to the ring grounding trunk line of the transformer and distribution room using a galvanized flat iron to form a closed grounding loop.

[0048] Iron sample II7 is made of 6mm diameter steel bars to form a U-shaped embedded iron piece with an inner hook and a flat top. The embedded iron piece is embedded at a center spacing of 800mm each, and is embedded in advance on the left and right sides of the top of the auxiliary cable trench before concrete pouring. After the concrete solidifies, it is welded with the vertical channel steel 6. The channel steel 6 should be 50mm higher than the building ground, and the horizontal tolerance is not more than 1mm per meter. The spacing between the channel steels 6 on both sides of the top of the auxiliary cable trench 12 is selected according to the width of the distribution cabinet. After the vertical welding of the channel steel 6, use galvanized flat iron to weld it to the ring grounding trunk line of the transformer and distribution room to form a closed grounding loop.

[0049] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Personnel in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A civil engineering structure of a cable trench for a power transformation and distribution project, arranged underground in a power distribution room (13), characterized in that: The invention comprises a main cable trench (11) and an auxiliary cable trench (12) arranged adjacent to each other; a concrete pier (5) is built between the main cable trench (11) and the auxiliary cable trench (12); a reinforced concrete beam (4) is erected on the top of the concrete pier (5); and concrete (8) is built on the outer sides of the main cable trench (11) and the auxiliary cable trench (12) for reinforcement; A cable bracket (1) is installed inside the main cable trench (11); iron sample I (3) is embedded on both sides of the top; an iron sample II (7) is embedded on the top of the auxiliary cable trench (12); a channel steel (6) is fixed on the top of the iron sample II (7); and the channel steel (6) extends out of the upper part of the ground of the power distribution room (13); The concrete piers (5) are arranged in pairs, and the gaps (15) between the concrete piers (5) are connected to the inside of the main cable trench (11) and the auxiliary cable trench (12).

2. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 1 is characterized by: Iron pieces (16) are pre-buried on both sides of the main cable trench (11), and 2 to 4 layers of cable brackets (1) are fixed on the iron pieces (16).

3. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 1 is characterized by: A first water collection port (9) is provided at the bottom of the main cable trench (11), and a second water collection port (10) is provided at the bottom of the auxiliary cable trench (12). PVC pipes are installed in the first water collection port (9) and the second water collection port (10) for drainage.

4. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 1 is characterized by: The ironwork sample I (3) is U-shaped as a whole, with a right triangle at the top and an inward hook at the bottom.

5. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 1 is characterized by: The ironwork sample II (7) is U-shaped as a whole, with a rectangular top and an inwardly hooked bottom.

6. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 1 is characterized by: A cover plate (2) is provided on the top of the main cable trench (11), and the cover plate (2) is hinged to an angle steel fixed to the top of the ironwork sample I (3).

7. The civil engineering structure of the cable trench of the power transformation and distribution project according to claim 3 is characterized by: The slopes inside the first water collection port (9) and the second water collection port (10) are 5° to 10°.

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