Automatic drainage system for accumulated water in cable trench of substation

Abstract

The utility model provides an automatic drainage system for accumulated water in a cable trench of a substation, which relates to the technical field of safety equipment of an electric power system and comprises a cable trench, a water collecting well, a self-priming centrifugal pump, a controller and a liquid level transmitter, the cable trench is communicated with the water-collecting well; the water collecting well guides accumulated water in a cable trench into the water collecting well, the liquid level transmitter is located at the bottom of the water collecting well and connected with the controller, the controller is connected with the self-priming centrifugal pump, the self-priming centrifugal pump is connected with a water pumping pipe and a water drainage pipe, and the end of the water pumping pipe extends to the bottom of the water collecting well. The automatic drainage system has the advantages that the automatic drainage system is simple in structure and convenient to operate, the water level of accumulated water in a cable trench can be remotely monitored in real time through the mobile terminal, the water pump can be manually controlled to be started and stopped on site or remotely, the water pump can be automatically controlled to be started and stopped through the controller, and therefore safety of cables and electrical equipment in a substation is guaranteed; the method has the characteristics of safety, high efficiency and saving.

Description

Technical Field

[0001] This utility model relates to the technical field of power system safety equipment, specifically an automatic drainage system for water accumulation in substation cable trenches. Background Technology

[0002] Due to design and site selection, the bottom elevation of the indoor cable trenches in substations is lower than the outdoor ground level. During the rainy season, water seepage, ingress, and accumulation occur in the cable trenches. This leads to water immersion of the cables and increased humidity within the substation, resulting in reduced insulation performance of the cables and electrical equipment, thus affecting their lifespan. The traditional solution is for electricians to inspect the site and identify water accumulation in the cable trenches, then temporarily install drainage pumps to pump the water out. This method is time-consuming, labor-intensive, and inefficient, and cannot guarantee the safety of the cables and electrical equipment within the substation. Utility Model Content

[0003] In view of this, the present invention provides an automatic drainage system for water accumulation in substation cable trenches, including cable trenches, water collection wells, self-priming centrifugal pumps, controllers, and level transmitters;

[0004] The cable trench is located within the ground of the substation, and the cable trench is connected to the water collection well;

[0005] The level transmitter is located at the bottom of the water collection well and is connected to the controller. The controller is connected to the self-priming centrifugal pump. The self-priming centrifugal pump is connected to a pumping pipe and a drain pipe. The pumping pipe extends to the bottom of the water collection well, and the drain pipe extends to an outdoor drainage ditch.

[0006] The controller is used to sense the water level in the collection well via a level transmitter and to control the start and stop of the self-priming centrifugal pump, which is used to pump the water in the collection well to the outdoor drainage ditch.

[0007] Furthermore, the water pumping pipe is a PVC steel wire flexible hose.

[0008] Furthermore, a filter cover is provided at the end of the pumping pipe that extends into the water collection well.

[0009] Furthermore, the controller is a 4G liquid level acquisition controller, and a signal antenna is also connected to the controller. The signal antenna is used to enable the 4G liquid level acquisition controller and the mobile terminal to establish a wireless communication connection.

[0010] Furthermore, it also includes a control box, in which the controller is fixed, and an AC contactor is provided inside the control box. The controller is connected to the self-priming centrifugal pump through the AC contactor.

[0011] Furthermore, the control box is also equipped with a leakage current protection circuit breaker, which is connected in series between the controller and the AC contactor.

[0012] Furthermore, the level transmitter is equipped with a stainless steel housing.

[0013] Furthermore, a thin layer of permeable cement mortar is laid at the bottom of the water collection well.

[0014] Furthermore, the cable trench is a ring-shaped trench that surrounds the transformer in the substation and the water collection well.

[0015] Furthermore, the depth of the water collection well is greater than the depth of the cable trench, and the water collection well and the cable trench are connected.

[0016] The beneficial effects of this utility model's automatic drainage system for substation cable trenches are as follows: The automatic drainage system includes a cable trench, a collection well, a self-priming centrifugal pump, a controller, and a level transmitter. The cable trench is connected to the collection well. The collection well guides the accumulated water in the cable trench into it. The level transmitter is located at the bottom of the collection well and is connected to the controller. The controller is connected to the self-priming centrifugal pump, which is connected to a pumping pipe and a drain pipe. The pumping pipe extends to the bottom of the collection well, and the drain pipe extends to an outdoor drainage ditch. When the cable trench accumulates a large amount of water, causing the water level in the collection well to rise to a preset upper limit, the level transmitter transmits the monitored water level data to the controller. The controller then activates the self-priming centrifugal pump to pump the water from the collection well into the outdoor drainage ditch, thereby draining the water from the collection well. This utility model has a simple structure and is easy to operate. It does not require manual on-site inspection and manual drainage. The automatic drainage system can remotely monitor the water level in the cable trench in real time through a mobile terminal. Staff can manually control the start and stop of the water pump on-site or remotely, or control the start and stop of the water pump automatically. This greatly saves labor costs and ensures the safety of cables and electrical equipment in the substation. The automatic drainage system is safe, efficient and economical. Attached Figure Description

[0017] Figure 1 This is a plan view of the installation structure of an automatic drainage system for water accumulation in a substation cable trench, according to an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of an automatic drainage system for cable trench water accumulation in a substation, according to an embodiment of this utility model.

[0019] Figure 3 This is a structural diagram of the internal components of the control box of an automatic drainage system for cable trench water accumulation in a substation, according to an embodiment of this utility model.

[0020] In the above diagram: 1-Level transmitter, 2-Control box, 3-Self-priming centrifugal pump, 4-Pumping pipe, 5-Drainage pipe, 6-Filter cover, 7-Collection well, 8-Cable trench, 9-Outdoor drainage ditch, 10-Controller, 11-Signal antenna, 12-AC contactor, 13-Residual current circuit breaker. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] Please refer to Figures 1 to 3 The present invention relates to an automatic drainage system for cable trenches in substations, comprising a cable trench 8, a water collection well 7, a self-priming centrifugal pump 3, a controller 10, and a level transmitter 1.

[0023] The cable trench 8 is located within the substation ground level and is connected to the water collection well 7. In this embodiment, the dimensions of the water collection well 7 are: 0.8 meters (width) * 1.5 meters (length) * 2 meters (depth). The level transmitter 1 is located at the bottom of the water collection well 7 and is connected to the controller 10. The controller 10 is connected to the self-priming centrifugal pump 3. The self-priming centrifugal pump 3 is connected to a pumping pipe and a drain pipe 5. The end of the pumping pipe extends to the bottom of the water collection well 7, and the end of the drain pipe 5 extends to the outdoor drainage ditch 9.

[0024] The controller 10 is used to sense the water level in the collection well 7 via the level transmitter 1, and to control the start and stop of the self-priming centrifugal pump 3, which is used to pump the water in the collection well 7 to the outdoor drainage ditch 9.

[0025] When there is a lot of water in the cable trench, causing the water level in the collection well 7 to rise to the preset upper limit, the level transmitter 1 transmits the monitored water level data to the controller 10. The controller 10 can control the self-priming centrifugal pump 3 to start, pumping the water in the collection well into the outdoor drainage ditch 9, thereby draining the water in the collection well 7 and ensuring the safety of cables and electrical equipment in the substation.

[0026] In a preferred embodiment, the pumping pipe is a PVC steel wire flexible hose. A filter cover 6 is provided at the end of the pumping pipe extending into the collection well 7. Using a PVC steel wire flexible hose for the pumping pipe 4 facilitates laying within the cable trench 8. Installing the filter cover 6 at the end (suction port) of the pumping pipe 4 prevents debris from being sucked into the self-priming centrifugal pump 3. The filter cover 6 also increases the weight of the pumping pipe, allowing the suction port to sink to the bottom of the collection well 7. The drain pipe 5 is a PVC rigid drain pipe.

[0027] In a preferred embodiment, the controller 10 is a 4G liquid level acquisition controller, and a signal antenna 11 is also connected to the controller 10. The signal antenna 11 is used to enable wireless communication between the 4G liquid level acquisition controller 10 and the mobile terminal. The mobile terminal can view the water level data in the collection well 7 monitored by the liquid level transmitter 1 in real time through the controller 10. When a water level upper limit is set in the controller 10, if the controller detects that the water level data in the collection well 7 exceeds the upper limit, the controller 10 controls the self-priming centrifugal pump 3 to start and discharge the water in the collection well 7. It can be understood that the operator can either operate the controller on-site to start or stop the self-priming centrifugal pump 3, or operate the mobile terminal to control the self-priming centrifugal pump 3 to start or stop through the controller 10.

[0028] In a preferred embodiment, the automatic drainage system further includes a control box 2, with a controller 10 fixed inside the control box 2. The controller 10 also contains an AC contactor 12, which connects to the self-priming centrifugal pump. The controller 10 controls the start and stop of the self-priming centrifugal pump 3 via the AC contactor 12.

[0029] In a preferred embodiment, the control box 2 is further provided with a leakage current protection circuit breaker 13, which is connected in series between the controller 10 and the AC contactor 12. The leakage current protection circuit breaker 13 is used to automatically disconnect the power supply circuit of the self-priming centrifugal pump after leakage occurs.

[0030] In a preferred embodiment, the level transmitter 1 is a stainless steel submersible level transmitter, meaning that the level transmitter 1 is equipped with a stainless steel housing with water permeable holes. The stainless steel housing is fixed to the lowest point of the bottom of the water collection well 7. The level transmitter 1 is equipped with a signal line, which passes through the stainless steel housing and is connected to the controller 10. The stainless steel submersible level transmitter has the advantages of corrosion resistance, rust resistance, high sensitivity, accurate measurement, and stable performance.

[0031] In a preferred embodiment, the bottom of the water collection well 7 is lined with a thin layer of permeable cement mortar. The cable trench 8 is an annular trench surrounding the transformer and the water collection trench within the substation. The cable trench 8 prevents external rainwater from wetting the transformer and causing damage. The depth of the water collection well 7 is greater than the depth of the cable trench, wherein the bottom elevation of the water collection well 7 is 1 meter lower than the bottom elevation of the cable trench 8. The water collection well 7 is connected to the cable trench via a channel, ensuring that all water accumulated in the cable trench 8 flows into the water collection well 7 and is then pumped out by a self-priming centrifugal pump.

[0032] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0033] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A substation cable trench water accumulation automatic drainage system, characterized in that: The cable trench, the water collecting well, the self-suction centrifugal pump, the controller and the liquid level transmitter are included. The cable trench is located in the ground of the transformer substation and communicates with the water collecting well. The liquid level transmitter is located at the bottom of the water collecting well and is connected with the controller, the controller is connected with the self-suction centrifugal pump, the self-suction centrifugal pump is connected with the water pumping pipe and the water draining pipe, the water pumping pipe extends to the bottom of the water collecting well, and the water draining pipe extends to the outdoor water draining ditch. The controller is used for sensing the liquid level of the accumulated water in the water collecting well through the liquid level transmitter and controlling the start and stop of the self-suction centrifugal pump, and the self-suction centrifugal pump is used for pumping the water in the water collecting well to the outdoor water draining ditch.

2. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: The water pumping pipe is a PVC steel wire hose.

3. The substation cable trench water accumulation automatic drainage system according to claim 2, characterized in that: The end of the water pumping pipe extending into the water collecting well is provided with a filter cover.

4. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: The controller is a 4G liquid level acquisition controller, and a signal antenna is further connected to the controller, and the signal antenna is used for wirelessly connecting the 4G liquid level acquisition controller and a mobile terminal.

5. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: A control box is further included, the controller is fixed in the control box, an AC contactor is further arranged in the control box, and the controller is connected with the self-suction centrifugal pump through the AC contactor.

6. The substation cable trench water accumulation automatic drainage system according to claim 5, characterized in that: A leakage protection circuit breaker is further arranged in the control box and is connected in series between the controller and the AC contactor.

7. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: The liquid level transmitter is externally provided with a stainless steel shell.

8. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: A layer of water-permeable thin cement mortar is paved at the bottom of the water collecting well.

9. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: The cable trench is an annular groove, and the cable trench surrounds the transformer in the transformer substation and the water collecting well.

10. The substation cable trench water accumulation automatic drainage system according to claim 1, characterized in that: The depth of the water collecting well is greater than that of the cable trench, and the water collecting well communicates with the cable trench through a trench.

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