Multipurpose waterproof cable well

Abstract

The utility model relates to a multipurpose waterproof cable well which comprises a well bottom, a well wall, a well top, a well mouth, a well cover and a water collecting groove, a fireproof and explosion-proof wall is arranged at the center line of the well bottom in the length direction, and a plurality of embedded parts are evenly arranged on the wall bodies on the two sides of the fireproof and explosion-proof wall. A plurality of embedded parts are evenly arranged on the well walls on the two sides parallel to the fireproof and explosion-proof wall, a plurality of layers of steel bars are fixed between the wall bodies on the two sides of the fireproof and explosion-proof wall and the corresponding side well walls through the embedded parts, the steel bars on the uppermost layer form a cable support, and a cable enters the well from the upper end of the well wall at one end, is laid on the cable support and penetrates out of the upper end of the well wall at the other end. The plurality of steel bars below the cable bracket are reinforcing ribs; the shape of the upper end of the fire-proof and explosion-proof wall is the same as that of the well top, and the upper end of the fire-proof and explosion-proof wall is embedded into According to the utility model, the risk probability that the cable head is laid in water can be greatly reduced, the stress damage to the cable caused by freezing is effectively reduced, and the occurrence of cable faults is reduced.

Description

Technical Field

[0001] This utility model relates to cable wells, specifically to multi-purpose waterproof cable wells. Background Technology

[0002] With the development of modern urban power grids, overhead lines are increasingly being constructed underground, leading to a surge in the use of cables in power transmission and transformation. Consequently, the requirements for cable operation are becoming increasingly stringent. During the laying of cable transmission lines, cable wells are required at regular intervals, playing a crucial role in the normal operation of the entire transmission corridor. Therefore, waterproofing of cable wells is of paramount importance. Currently, domestic cable-related technologies have achieved water-blocking capabilities for both the cable body and the cable head. However, the following problems exist in the use of 110kV cable lines in the Daqing area of ​​Northeast China:

[0003] Daqing is located on the Songnen Plain, with an average altitude of 140 meters. It has a shallow water table, high soil moisture content, and winter temperatures can reach as low as -40℃, classifying it as an extremely cold climate region. In practical engineering projects, using traditional cable laying methods would result in cable heads being submerged in water for extended periods. During winter operation, these cable heads are at risk of freezing, creating stress and posing operational safety hazards. In severe cases, there is a risk of explosion, seriously threatening the principle of safe and continuous operation of the power grid.

[0004] Traditional cable wells are subject to the recurring freeze-thaw cycles of the year, and after a certain number of years, common problems such as water seepage and leakage still exist. As part of the cable infrastructure, drainage must be carried out when water is found in the cable well, but this increases the workload and intensity of the operating unit. Summary of the Invention

[0005] The purpose of this utility model is to provide a multi-purpose waterproof cable well. This multi-purpose waterproof cable well is used to solve the problem that cable heads in existing cable wells in Northeast China are at risk of freezing during winter operation, which poses a safety hazard to the cable heads and results in high workload.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: This multi-purpose waterproof cable well includes a well bottom, well wall, well top, well opening, well cover, and water collection tank. A fireproof and explosion-proof wall is set at the center line along the length direction of the well bottom. Several embedded parts are evenly arranged on both sides of the fireproof and explosion-proof wall. Several embedded parts are evenly arranged on both sides of the well wall parallel to the fireproof and explosion-proof wall. Multiple steel bars are fixed between the two sides of the fireproof and explosion-proof wall and the corresponding side well wall through the embedded parts. The uppermost layer of steel bars forms a cable support. The cable enters the well from the upper end of one end of the well wall, is laid on the cable support, and then exits through the upper end of the other end of the well wall. The multiple steel bars below the cable support are reinforcing ribs. The upper part of the fireproof and explosion-proof wall has the same shape as the well top, and the upper part of the fireproof and explosion-proof wall is embedded in the upward-protruding well top space.

[0007] In the above scheme, a vent cap is installed on the top of the well. The vent cap facilitates air circulation in the cable well and strictly prevents situations where toxic gases or insufficient oxygen may occur during maintenance, thus endangering the personal safety of the repair personnel.

[0008] In the above scheme, the fireproof and explosion-proof wall is 2 meters thick and is located between the two well openings.

[0009] In the above scheme, a water collection trough is set at the bottom of the well, and a water collection trough is set directly below each well opening, so that the water at the bottom of the well can flow into the water collection trough.

[0010] This utility model has the following beneficial effects:

[0011] In this utility model, the cable brackets are located on both sides of the upper part of the fireproof and explosion-proof wall, below the top of the well, so that the cable can be laid at a high place inside the well. This can greatly reduce the probability of the cable head being laid in water, play a role in waterproofing the cable, and effectively reduce stress damage to the cable caused by icing. These two aspects can reduce the occurrence of cable faults by more than 95%.

[0012] 2. Currently, a single emergency repair of a 110kV cable fault requires 7 personnel and the repair time is at least 24 hours. Based on the minimum hourly wage of 13 yuan in Daqing City, the reduction in the number of faults can save the company 2,184 yuan in costs.

[0013] 3. In traditional cable wells, if a cable head fails, there is a risk of explosion, or if one side of the cable head is under maintenance while the other side of the cable cannot be de-energized, there is a risk of "near-electricity" construction. By setting up fireproof and explosion-proof partitions, the explosion-proof safety is good, and the fireproof and explosion-proof functions can be effectively avoided, thus avoiding various risks that endanger personal safety.

[0014] 4. Traditional cable wells, once operational, become confined spaces for work. Working in such spaces requires precautions against toxic gases and insufficient oxygen. Basic production operations typically follow the principle of "ventilation first, then inspection, then work," strictly prohibiting work if ventilation fails. However, in the event of a major accident such as cable head damage, rapid repair is crucial. This new cable well design incorporates a ventilator at the top to facilitate airflow and ventilation, preventing hazards such as toxic gases and insufficient oxygen from endangering repair personnel and allowing for more valuable repair time.

[0015] 5. This utility model has strong adaptability, strong scalability, and simple construction. It has obvious advantages, especially for areas with shallow groundwater levels and high latitudes and cold regions, such as environmental friendliness and outstanding economic benefits. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a top view of the present invention.

[0018] In the diagram: 1-Well wall, 2-Well top, 3-Well opening, 4-Water collection trough, 5-Fireproof and explosion-proof wall, 6-Embedded parts, 7-Cable bracket, 8-Wind cap, 9-Cable. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Combination Figure 1 , Figure 2As shown, this multi-purpose waterproof cable well includes a well bottom, well wall 1, well top 2, well opening 3, well cover, and water collection tank 4. Well openings 3 are provided at both ends of the well, and the well cover is installed on the well openings 3 to seal the well. A fireproof and explosion-proof wall 5 is installed at the center line along the length of the well bottom. The fireproof and explosion-proof wall is 2 meters thick. In this embodiment, the fireproof and explosion-proof wall is 100 meters long and located between the two well openings 3. After workers enter the well through the well openings 3, the fireproof and explosion-proof wall 5 will not obstruct their movement and work. Several embedded parts 6 are evenly arranged on both sides of the fireproof and explosion-proof wall 5, and several embedded parts 6 are evenly arranged on both sides of the well wall 1 parallel to the fireproof and explosion-proof wall. The fireproof and explosion-proof wall is connected to the corresponding side well wall by the embedded parts. 6. Multiple layers of steel bars are fixed, with each bar parallel to the others. The top layer of steel bars forms a cable support 7. The upper part of the fireproof and explosion-proof wall has the same shape as the top of the well 2. The upper part of the fireproof and explosion-proof wall is embedded in the upward-protruding space of the top of the well. Cable holes are set at the upper ends of both ends of the cable well. When laying the cable, the cable 9 enters the well from the cable hole at the upper end of one end of the well wall, is laid on the cable support 7, and then exits the cable well through the cable hole at the upper end of the other end of the well wall. Because the upper part of the fireproof and explosion-proof wall is embedded in the upward-protruding space of the top of the well, the cable 9 laid on the cable support 7 is much higher than the bottom of the well and is close to the top of the well 2. It is laid at a high point in the well and will not be close to water. During winter operation, there is no risk of the cable head freezing, avoiding unsafe situations caused by the cable head freezing.

[0021] Because the upper part of the fireproof and explosion-proof wall 5 is embedded in the upward-protruding well top space, the fireproof and explosion-proof wall 5 divides the well into two parts. When one part catches fire, the fireproof and explosion-proof wall 5 blocks the fire on one side, preventing the fire from spreading and making fire extinguishing relatively easy, thus playing a fireproof role. The multiple steel bars under the cable bracket 7 are reinforcing ribs, which can make the fireproof and explosion-proof wall more stable. When one side of the fireproof and explosion-proof wall explodes, the fireproof and explosion-proof wall is relatively stable and can block the explosion on that side, preventing it from affecting the other side, thus achieving the explosion-proof function.

[0022] A ventilation cap 8 is installed on the top of the well 2. The ventilation cap 8 facilitates air circulation in the cable well and strictly prevents situations such as toxic gases or insufficient oxygen during maintenance from endangering the personal safety of maintenance personnel.

[0023] A water collection trough 4 is installed at the bottom of the well. A water collection trough 4 is installed directly below each well opening. Water at the bottom of the well can flow into the water collection trough 4 to prevent the bottom of the well from freezing in winter.

Claims

1. A multi-purpose waterproof cable well, characterized in that: This multi-purpose waterproof cable well includes a well bottom, well wall, well top, well opening, well cover, and water collection tank. A fireproof and explosion-proof wall is installed at the center line along the length of the well bottom. Several embedded parts are evenly arranged on both sides of the fireproof and explosion-proof wall. Several embedded parts are evenly arranged on both sides of the well wall parallel to the fireproof and explosion-proof wall. Multiple layers of steel bars are fixed between the two sides of the fireproof and explosion-proof wall and the corresponding side well wall through the embedded parts. The uppermost layer of steel bars forms a cable support. The cable enters the well from the top of one end of the well wall, is laid on the cable support, and then exits through the top of the other end of the well wall. The steel bars below the cable support are reinforcing ribs. The upper part of the fireproof and explosion-proof wall has the same shape as the well top, and the upper part of the fireproof and explosion-proof wall is embedded in the upward-protruding well top space.

2. The multi-purpose waterproof cable well according to claim 1, characterized in that: A ventilation cap is installed on the top of the well.

3. The multi-purpose waterproof cable well according to claim 2, characterized in that: The fireproof and explosion-proof wall is 2 meters thick and is located between the two well openings.

4. The multi-purpose waterproof cable well according to claim 3, characterized in that: A water collection trough is installed at the bottom of the well, with one trough located directly below each well opening.

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