trench cable trench
By introducing a detachable guide tube and ventilation pipe structure into the cable trench, the problems of laborious ventilation and rainwater intrusion in cable trenches are solved, achieving convenient and efficient ventilation and sealing effects, and reducing energy consumption and equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING YONGKAI ELECTRIC CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-30
AI Technical Summary
Existing ventilation methods for cable trenches are laborious and susceptible to rainwater intrusion. Natural ventilation is inefficient, while mechanical ventilation is energy-intensive.
A trench-type cable trench was designed, which adopts a detachable guide tube and ventilation pipe structure. The ventilation pipe can move up and down. Combined with a support plate and a sealing cover, it can achieve convenient ventilation and prevent rainwater from entering.
It improves the convenience and efficiency of ventilation operations, ensures the sealing of cable trenches when not ventilated, and reduces energy consumption and equipment costs.
Smart Images
Figure CN224431490U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable trenches, and in particular a trench-type cable trench. Background Technology
[0002] Underground cable laying methods include direct burial, conduit laying, and trench laying. Trench laying involves placing the cable in a trench, typically with a U-shaped cross-section and multiple support plates on its inner walls to support the cable. For ease of construction, trenches are usually prefabricated, manufactured in batches in a factory, and then transported to the construction site for installation. See the utility model patent application CN201620835279.X for "Cable Trench Unit and Cable Trench". Because cable trenches may accumulate organic matter containing sulfur, nitrogen, phosphorus, etc., which decomposes anaerobicly to produce harmful gases such as hydrogen sulfide, ventilation is necessary. Existing ventilation methods include natural ventilation and mechanical ventilation. Natural ventilation involves opening the cable trench cover for ventilation, which takes more than 30 minutes. Since the cable trench is buried underground, opening and closing the cover is laborious. Mechanical ventilation uses air pumps and fans to deliver outside air into the cable trench, which is energy-intensive, and rainwater can easily enter the cable trench through the ventilation openings. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a trench-type cable trench that can facilitate ventilation and prevent rainwater and other substances from entering the cable trench through the ventilation channel.
[0004] To solve the above problems, the technical solution adopted by this utility model is: a trench-type cable trench, including a trench body with a concave cross-section and a cover plate that can be detachably installed on the upper port of the trench body.
[0005] A vertical guide cylinder is provided on the cover plate, and a detachable sealing cover is provided on the top of the guide cylinder. A ventilation pipe that is clearance-fitted with the guide cylinder is provided inside the guide cylinder, and the lower end of the ventilation pipe passes through the cover plate and extends into the trench.
[0006] Furthermore, the upper end of the ventilation pipe is provided with an end cap, and the upper side wall of the ventilation pipe is provided with an air inlet.
[0007] Furthermore, a handle is provided on the upper surface of the end cap.
[0008] Furthermore, the lower sidewall of the ventilation duct is provided with multiple slots, and each slot is provided with a support plate that is inserted and connected to the slot.
[0009] Furthermore, the bottom of the ditch is provided with multiple water collection wells, the bottom surface of the inner cavity of the ditch is inclined downward toward the water collection wells, and the water collection wells are connected to a drainage mechanism.
[0010] Furthermore, the lower end of the ventilation pipe extends into the water collection well.
[0011] Furthermore, the upper surface of the sealing cap is provided with a cable marking.
[0012] Furthermore, the inner wall of the trench is provided with a plurality of horizontal support columns, and the upper surface of the support columns is provided with positioning grooves.
[0013] The beneficial effects of this invention are as follows: When ventilation of the cable trench is required, the sealing cover is removed, and the ventilation pipe is pulled upwards until its upper end is above the ground. At this point, the ventilation pipe connects the internal and external spaces of the cable trench, allowing airflow from the external space to enter the cable trench, thus ventilating it. Ventilation can be performed during windy weather to improve the ventilation effect. After ventilation is complete, the ventilation pipe is moved downwards to its initial position, and then the sealing cover is installed to seal the upper end of the guide tube, preventing rainwater and other contaminants from entering the cable trench.
[0014] Compared with the traditional method of opening the entire cover for ventilation, this utility model is more convenient and labor-saving to operate, and can ensure the sealing of the cable trench when ventilation is not required, preventing rainwater and other substances from entering the cable trench. Attached Figure Description
[0015] Figure 1 This is a schematic cross-sectional view of the cable trench of this utility model when it is not ventilated;
[0016] Figure 2 This is a cross-sectional schematic diagram of the cable of this utility model when it is used for air transmission;
[0017] Figure 3 This is a diagram illustrating the drainage process;
[0018] Reference numerals: 1—Trench body; 2—Cover plate; 3—Guide cylinder; 4—Sealing cover; 5—Ventilation pipe; 6—End cover; 7—Air inlet; 8—Handle; 9—Card slot; 10—Support plate; 11—Water collection well; 12—Cable marker; 13—Support column; 14—Positioning slot. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] The trench-type cable trench of this utility model, such as Figure 1 and Figure 2 As shown, the structure includes a trench 1 with a U-shaped cross-section and a cover plate 2 detachably installed at the upper end of the trench 1. The trench 1 can be a precast trench, made of metal or concrete, or a concrete trench cast on-site during construction. The cover plate 2 is a precast slab made of the same material as the trench 1, and can seal the upper end of the trench 1. A sealing gasket can be placed between the cover plate 2 and the trench 1 to improve the sealing performance.
[0021] A vertical guide cylinder 3 is provided on the cover plate 2. The guide cylinder 3 can be made of metal. The cover plate 2 has a through hole coaxial with the guide cylinder 3, and the diameter of the through hole is the same as the inner diameter of the guide cylinder 3. A removable sealing cover 4 is provided on the top of the guide cylinder 3. The sealing cover 4 can be connected to the guide cylinder 3 by screws or direct thread connection. To ensure sealing, a sealing gasket can be placed between the guide cylinder 3 and the sealing cover 4. When the sealing cover 4 is a metal cover plate, the guide cylinder 3 is welded to the sealing cover 4; when the sealing cover 4 is a concrete slab, a metal connecting ring plate can be embedded during the preparation of the sealing cover 4, and the lower end of the guide cylinder 3 is welded to the metal connecting ring plate. A ventilation pipe 5 is provided inside the guide cylinder 3 with a clearance fit. The lower end of the ventilation pipe 5 passes through the cover plate 2 and extends into the trench 1. The ventilation pipe 5 can be made of metal, but plastic pipe is preferred for its lighter weight and ease of vertical movement. The clearance fit between the ventilation pipe 5 and the guide cylinder 3 allows the ventilation pipe 5 to move vertically and rotate.
[0022] When ventilation is not required, the sealing cap 4 seals the upper end of the guide cylinder 3, ensuring a good seal within the trench 1 and preventing rainwater from entering the trench 1 through the guide cylinder 3 or the ventilation pipe 5, thus providing excellent waterproofing. When ventilation is needed, the sealing cap 4 is removed, opening the upper end of the guide cylinder 3. Then, the ventilation pipe 5 is pulled upwards until its upper end is at a suitable height above the ground. At this point, the upper end of the ventilation pipe 5 connects to the external space, and the lower end connects to the trench 1, allowing external air to enter the trench 1 and ventilate it. After ventilation is complete, the ventilation pipe 5 is lowered back into the guide cylinder 3, and the sealing cap 4 is then installed.
[0023] To ensure sufficient air circulation, this invention includes multiple guide tubes 3 and ventilation pipes 5. During ventilation, the upper ends of all ventilation pipes 5 are moved above ground level. Ventilation can be carried out during windy weather to ensure ventilation efficiency. To further improve ventilation efficiency, a fan or air pump can be used as an auxiliary device. That is, the upper ends of the ventilation pipes 5 are connected to the fan or air pump via pipes, allowing the fan or air pump to deliver outside air into the ventilation pipes 5.
[0024] When using natural wind for ventilation, since natural wind usually flows horizontally, it is difficult for it to enter the ventilation duct 5 from the upper end downwards. In order to facilitate the entry of natural wind into the ventilation duct 5, an end cap 6 is provided at the upper end of the ventilation duct 5, and an air inlet 7 is opened on the upper side wall of the ventilation duct 5. The air inlet 7 is opened on the top side wall of the ventilation duct 5. When ventilating, the ventilation duct 5 is rotated so that the air inlet 7 is positioned facing the wind, and air can easily enter the ventilation duct 5 through the air inlet 7 and flow along the ventilation duct 5 into the interior of the trench 1.
[0025] To facilitate pulling the ventilation pipe 5 upward, a handle 8 is provided on the upper surface of the end cap 6. The operator can pull the ventilation pipe 5 upward through the handle 8, making the operation more convenient.
[0026] To ensure stability of the ventilation duct 5 during ventilation, multiple slots 9 are provided on the lower side wall of the ventilation duct 5. Each slot 9 contains a support plate 10 that is inserted into and connected to the slot 9. The support plates 10 are either inserted into the slot 9 or located outside the ventilation duct 5. When ventilation is not required, the support plates 10 are removed from the slots 9, and the ventilation duct 5 can be lowered into the guide cylinder 3. During ventilation, the ventilation duct 5 is pulled upwards to a suitable height, so that the slots 9 are above the guide cylinder 3. Then, the support plates 10 are inserted into the slots 9, releasing the ventilation duct 5. The support plates 10 then rest on the upper surface of the guide cylinder 3, providing support for the ventilation duct 5. There can be two or three support plates 10, as long as they provide stable support for the ventilation duct 5.
[0027] To facilitate the drainage of rainwater entering the ditch 1, multiple collection wells 11 are installed at the bottom of the ditch 1. The collection wells 11 are evenly distributed, with a distance of 20 to 30 meters between adjacent collection wells 11. The collection wells 11 are square or circular and can be integrally formed with the bottom wall of the ditch 1. The bottom surface of the inner cavity of the ditch 1 is inclined downwards towards the collection wells 11, so that when rainwater enters the ditch 1, it can flow along the bottom wall of the ditch 1 into the collection wells 11. The collection wells 11 are connected to a drainage mechanism to drain the water accumulated in the collection wells 11.
[0028] Traditional drainage systems use water pumps connected to drain pipes. Each collection well 11 requires both a pump and a drain pipe, increasing equipment costs. Furthermore, external water may backflow into the collection well 11 through the drain pipe. To simplify the cable trench structure and reduce equipment costs, the lower end of the ventilation pipe 5 in this invention extends into the collection well 11. When water needs to be drained from the collection well 11, the sealing cover 4 at the upper end of the guide cylinder 3 is opened. Figure 3 As shown, the drain pipe is inserted into the ventilation pipe 5, and then flows along the ventilation pipe 5 into the water collection well 11. The drain pipe is then connected to a water pump to pump out the water accumulated in the water collection well 11. After drainage, the drain pipe is removed. For easier drainage, the drain pipe can also be fixed to the ventilation pipe 5, with its lower end extending into the bottom of the water collection well 11 and its upper end extending out of the top of the ventilation pipe 5. During drainage, the upper end of the drain pipe is connected to the water pump. Using this method, the water accumulated in each water collection well 11 can be drained sequentially.
[0029] The upper surface of the sealing cover 4 is provided with a cable marker 12. The upper surface of the sealing cover 4 is flush with the ground. The cable marker 12 can be text, symbols, or marker posts, indicating that there is a cable below, in order to prevent the construction unit from damaging the cable.
[0030] To facilitate the orderly laying of multiple cables, the inner wall of the trench 1 is provided with multiple horizontal support columns 13. The upper surface of the support columns 13 is provided with positioning grooves 14, which can be circular or rectangular. Each cable can be laid in one positioning groove 14 to ensure the stability of the cable.
[0031] The construction process of the cable trench of this utility model is as follows:
[0032] First, excavate the foundation pit. After leveling the bottom of the pit, lay a layer of crushed stone, approximately 50mm thick, with a particle size of 5 to 10mm. Then, place trench 1 on the crushed stone layer and fill the gaps between the outer side of trench 1 and the sidewall of the foundation pit with fine sand. Next, lay the cable into trench 1, then cover it with cover plate 2. Finally, fill the soil on top of cover plate 2 and compact it. After filling the soil, ensure the upper surface of the sealing cover 4 is flush with the ground.
[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A trench-type cable trench, comprising a trench body (1) with a U-shaped cross-section and a cover plate (2) detachably installed at the upper end of the trench body (1), characterized in that: A vertical guide tube (3) is provided on the cover plate (2). A detachable sealing cover (4) is provided on the top of the guide tube (3). A ventilation pipe (5) is provided inside the guide tube (3) with clearance fitting. The lower end of the ventilation pipe (5) passes through the cover plate (2) and extends into the groove (1).
2. The trench-type cable trench as described in claim 1, characterized in that: The upper end of the ventilation pipe (5) is provided with an end cap (6), and the upper side wall of the ventilation pipe (5) is provided with an air inlet (7).
3. The trench-type cable trench as described in claim 2, characterized in that: The upper surface of the end cap (6) is provided with a handle (8).
4. The trench-type cable trench as described in claim 1, characterized in that: The lower side wall of the ventilation pipe (5) is provided with multiple slots (9), and each slot (9) is provided with a support plate (10) that is inserted and connected to the slot (9).
5. The trench-type cable trench as described in claim 1, characterized in that: The bottom of the ditch (1) is provided with a plurality of water collection wells (11), and the bottom surface of the inner cavity of the ditch (1) is inclined downward toward the water collection wells (11), and the water collection wells (11) are connected to a drainage mechanism.
6. The trench-type cable trench as described in claim 5, characterized in that: The lower end of the ventilation pipe (5) extends into the water collection well (11).
7. The trench-type cable trench as described in claim 1, characterized in that: The upper surface of the sealing cover (4) is provided with a cable mark (12).
8. The trench-type cable trench as described in claim 1, characterized in that: The inner wall of the trench (1) is provided with a plurality of horizontal support columns (13), and the upper surface of the support columns (13) is provided with positioning grooves (14).