Buried box transformer substation shell convenient for internal overhaul and maintenance

Abstract

The utility model relates to the technical field of underground box transformer housings, and discloses an underground box transformer housing convenient for internal overhaul and maintenance, which comprises an outer housing and a water tank, the outer housing is supported and fixed above the water tank, the cross section area of the outer housing is smaller than that of the water tank, the upper side edge of the outer housing is provided with an opening, and a sealing cover is covered and sealed on the upper side edge of the outer housing. A plurality of drainage pipes are connected between the lower portion of the outer shell and the upper portion of the water tank and evenly distributed at the front end and the rear end of the water tank, electromagnetic valves are installed on the drainage pipes, a submersible pump is installed on the lower portion in the water tank, and a water pumping pipe is connected to an outlet of the submersible pump. According to the technical scheme, the water tank is arranged below the outer shell, and the water drainage pipes with the electromagnetic valves are connected between the upper portion of the water tank and the bottom of the outer shell, so that when overhaul and maintenance are needed, all the electromagnetic valves can be opened, and water is rapidly drained into the water tank through the water drainage pipes to be temporarily stored; and water in the outer shell is quickly discharged, so that internal maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of underground transformer box housing technology, specifically an underground transformer box housing that facilitates internal inspection and maintenance. Background Technology

[0002] A prefabricated substation, also known as a box-type substation or prefabricated transformer substation, is a factory-prefabricated, compact indoor or outdoor power distribution device that integrates high-voltage switchgear, distribution transformers, and low-voltage power distribution equipment according to a specific wiring scheme. It organically combines the functions of transformer voltage reduction and low-voltage power distribution, and installs them in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, theft-proof, heat-insulated, fully enclosed, and movable steel structure box. It is particularly suitable for urban power grid construction and renovation, and is a brand-new type of substation that has emerged after civil engineering substations. The underground box-type substation is buried underground, which can save ground space and reduce noise.

[0003] In buried substations, the transformer is installed inside the casing, which is filled with water for heat dissipation. When the transformer malfunctions, the water needs to be pumped out for repairs. However, in the event of a power outage, repairs need to be completed and power restored quickly to minimize losses. Traditional methods of pumping water out of the casing take a long time, making maintenance inconvenient. Therefore, we propose a buried substation casing that facilitates internal maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide an underground transformer substation housing that facilitates internal inspection and maintenance. By setting a water tank at the bottom of the housing, and connecting multiple drain pipes with solenoid valves between the top of the water tank and the bottom of the housing, when inspection and maintenance are required, all solenoid valves can be opened to quickly drain water into the water tank for temporary storage, so that the water inside the housing is quickly drained, facilitating internal inspection and maintenance, and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a buried transformer substation housing that facilitates internal inspection and maintenance, comprising an outer shell and a water tank. The outer shell is supported and fixed above the water tank. The cross-sectional area of ​​the outer shell is smaller than that of the water tank. An opening is provided on the upper side of the outer shell and sealed with a cover. Multiple drain pipes are connected between the lower part of the outer shell and the upper part of the water tank. Multiple drain pipes are provided and evenly distributed at the front and rear ends of the water tank. Solenoid valves are installed on the drain pipes. A submersible pump is installed inside the lower part of the water tank. A water suction pipe is connected to the outlet of the submersible pump. The water suction pipe extends to the outside of the water tank and connects to the upper interior of the outer shell.

[0006] By adopting the above technical solution, when a transformer malfunctions, all solenoid valves can be opened, and all drain pipes can be used to quickly drain the water inside the outer casing into a water tank for temporary storage. This allows the water inside the outer casing to be drained quickly, facilitating internal maintenance operations. Finally, the water can be pumped back into the outer casing.

[0007] Optionally, the water tank is vertically connected to a vertical pipe that communicates with its interior, and the height of the top of the vertical pipe is greater than the height of the outer shell.

[0008] By adopting the above technical solution, a pressure balancing valve can be installed at the top of the vertical pipe. When draining water or pumping water into the outer casing, the pressure inside the water tank can be balanced by the pressure balancing valve installed at the top of the vertical pipe.

[0009] Optionally, fins are vertically arranged on both the front and rear surfaces of the outer casing, and multiple fins are evenly arranged.

[0010] By adopting the above technical solution, the outer surface of the outer shell has a larger contact surface with the soil through the fins, which can improve the heat dissipation effect of the internal heat dissipation water.

[0011] Optionally, a filter box is provided inside the outer shell at the end of the water pump pipe. The water pump pipe is connected to the inside of the filter box, and a filter screen is fixed inside the filter box. A leak is provided on the side of the filter box that is connected to the inside of the outer shell.

[0012] By adopting the above technical solution, the water drawn back from the water tank to the outer shell will be filtered before entering the outer shell.

[0013] Optionally, handles are fixed to both sides of the surface of the cap, and the handles are fixed to the surface of the cap by welding.

[0014] By adopting the above technical solution, the cap can be removed by holding it with the handle.

[0015] Optionally, the filter box has an open structure on top, and the filter box is located below the opening side of the outer casing.

[0016] By adopting the above technical solution, it is convenient to clean the filter screen when there are accumulated impurities on the surface or impurities inside the filter box.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0018] 1. The technical solution of this application has a water tank installed at the bottom of the outer shell, and multiple drain pipes with solenoid valves connected between the top of the water tank and the bottom of the outer shell. When maintenance is required, all solenoid valves can be opened to quickly drain water into the water tank for temporary storage, so that the water inside the outer shell can be quickly drained and internal maintenance can be carried out.

[0019] 2. The technical solution of this application has an upwardly extending vertical pipe connected to the top of the water tank, which can be used to install a pressure balancing valve. When draining or pumping water, the internal pressure of the water tank is balanced, so that both drainage and pumping can be carried out smoothly.

[0020] 3. The technical solution of this application provides fins on the outer surface of the outer shell, which are in contact with the soil, so as to facilitate the dissipation of heat from the heat dissipation water to the surrounding soil.

[0021] 4. The technical solution of this application has fins on the outer surface of the outer shell and a filter box with a filter screen inside the outer shell at the end of the water pumping pipe. When clean water is pumped into the outer shell again, it will be filtered by the filter screen first, so that the water inside the outer shell is not easily mixed with impurities. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the underground transformer substation housing, which facilitates internal inspection and maintenance according to this utility model.

[0024] Figure 2 This is a schematic diagram of the internal structure of the water tank at the end of the pumping pipe of the underground transformer housing, which facilitates internal inspection and maintenance according to this utility model.

[0025] Figure 3 This is a schematic diagram of the internal structure of the outer shell of the pumping pipe end of the underground transformer substation housing, which is designed for easy internal inspection and maintenance according to this utility model.

[0026] In the diagram: 1. Outer shell; 11. Cover; 12. Handle; 13. Fin; 2. Water tank; 21. Submersible pump; 211. Pump pipe; 3. Drain pipe; 31. Solenoid valve; 4. Filter box; 41. Filter screen; 42. Leak; 5. Vertical pipe. Detailed Implementation

[0027] Please see Figure 1-3 This utility model provides a technical solution: an underground transformer housing that facilitates internal inspection and maintenance, including an outer shell 1 and a water tank 2. The outer shell 1 is supported and fixed above the water tank 2. An opening is provided on the upper side of the outer shell 1 and a sealing cover 11 is placed on it. When in use, both the water tank 2 and the outer shell 1 are buried in the soil. The sealing cover 11 is removed by the handles 12 on both sides of the surface of the sealing cover 11, thereby allowing the transformer to be installed inside the outer shell 1 through the opening. Sufficient cooling water is filled into the outer shell 1 and then the sealing cover 11 is closed. During use, the transformer is cooled by water, and the heat of the water is dissipated into the surrounding soil through the outer shell 1.

[0028] To improve heat dissipation, fins 13 are vertically arranged on the front and rear surfaces of the outer shell 1. Multiple fins 13 are evenly arranged, so that the outer shell 1 has a larger contact area with the soil, which is more conducive to dissipating the heat of the water into the surrounding soil.

[0029] Multiple drain pipes 3 are connected between the lower part of the outer casing 1 and the upper part of the water tank 2. Multiple drain pipes 3 are evenly distributed at the front and rear ends of the water tank 2, and solenoid valves 31 are installed on the drain pipes 3. The controller of the solenoid valve 31 is connected to a separate low-voltage power supply. When maintenance is required, the solenoid valve 31 can be opened to quickly drain the water inside the outer casing 1 into the water tank 2. Since the transformer installed inside the outer casing 1 occupies a large volume, and the cross-sectional area of ​​the outer casing 1 is smaller than that of the water tank 2, the water tank 2 can completely store the water inside the outer casing 1, which facilitates the internal maintenance work.

[0030] A submersible pump 21 is installed at the bottom inside the water tank 2. A water pump pipe 211 is connected to the outlet of the submersible pump 21. The water pump pipe 211 runs through the outside of the water tank 2 and connects to the upper interior of the outer shell 1. After maintenance is completed, all solenoid valves 31 are closed, and then the submersible pump 21 is started, which can pump water back into the interior of the outer shell 1.

[0031] In addition, a filter box 4 is provided inside the outer shell 1 at the end of the water pump pipe 211. The water pump pipe 211 is connected to the inside of the filter box 4, and a filter screen 41 is fixed inside the filter box 4. A leak 42 connected to the inside of the outer shell 1 is provided on the side of the filter box 4, so that before the clean water enters the inside of the outer shell 1, it will be filtered by the filter screen 41 in the filter box 4 to remove impurities, and then enter the outer shell 1. At the same time, the top of the filter box 4 is an open structure, and the filter box 4 is placed below the side of the opening on the top of the outer shell 1, which makes it convenient to clean the filter screen 41 and the inside of the filter box 4 when needed.

[0032] A vertical pipe 5 is connected to the top of the water tank 2 and communicates with its interior. The height of the top of the vertical pipe 5 is greater than the height of the outer shell 1. When in use, an air pressure balance valve is installed on the top of the vertical pipe 5 and protrudes to the outside. When draining water from the outer shell 1 or pumping water into it again, the air pressure inside the water tank 2 can be balanced to ensure smooth drainage and pumping.

[0033] In use, dig a pit in the ground, then place the outer casing 1 and water tank 2 together. First, waterproof and anti-corrosion protection is applied to the location of the solenoid valve 31, and then fill the pit with soil until most of the water tank 2 and outer casing 1 are buried. After removing the cover 11, install the transformer inside the outer casing 1, and then inject sufficient cooling water into the outer casing 1. The controllers of the solenoid valve 31 and submersible pump 21 are powered by another low-voltage line. After covering the cover 11, cover the outer casing 1 again with soil. Finally, connect and install the air pressure balance valve to the top of the vertical pipe 5. When the transformer malfunctions or needs maintenance, disconnect the power to the transformer, remove the surface soil, and remove the cover 11 through the handle 12. Then, control all the solenoid valves 31 to open, and the cooling water... The water can be quickly drained into the interior of the outer casing 1 through multiple drain pipes 3. Since the transformer is installed inside the outer casing 1, it occupies a large volume. In addition, the cross-sectional area of ​​the water tank 2 is larger, so that all the water in the outer casing 1 can be drained into the water tank 2 for temporary storage, causing the water level inside the outer casing 1 to drop rapidly, which facilitates quick maintenance and repair work. After maintenance and repair are completed, all solenoid valves 31 are closed, and the submersible pump 21 is started to pump the water that has entered the water tank 2 back into the outer casing 1. The pumped water will first enter the filter box 4, be filtered by the filter screen 41, and then enter the interior of the outer casing 1 through the leak 42. Finally, the cover 11 is closed again and soil is filled in. During the drainage and pumping process, the air pressure balancing valve installed at the top of the vertical pipe 5 can balance the air pressure to ensure smooth drainage and pumping.

Claims

1. A buried transformer substation housing that facilitates internal inspection and maintenance, comprising an outer shell (1) and a water tank (2), characterized in that: The outer shell (1) is supported and fixed above the water tank (2). The cross-sectional area of ​​the outer shell (1) is smaller than that of the water tank (2). An opening is provided on the upper side of the outer shell (1) and a sealing cap (11) is placed on it. Multiple drain pipes (3) are connected between the lower part of the outer shell (1) and the upper part of the water tank (2). Multiple drain pipes (3) are provided and evenly distributed at the front and rear ends of the water tank (2). A solenoid valve (31) is installed on the drain pipe (3). A submersible pump (21) is installed inside the lower part of the water tank (2). A water pump (211) is connected to the outlet of the submersible pump (21). The water pump (211) extends through to the outside of the water tank (2) and connects to the upper interior of the outer shell (1).

2. The underground transformer substation housing for easy internal inspection and maintenance as described in claim 1, characterized in that: The water tank (2) is vertically connected to a vertical pipe (5) that communicates with its interior. The top of the vertical pipe (5) is higher than the height of the outer shell (1).

3. The underground transformer substation housing for easy internal inspection and maintenance as described in claim 1, characterized in that: The front and rear surfaces of the outer shell (1) are vertically provided with fins (13), and multiple fins (13) are evenly provided.

4. The underground transformer substation housing for easy internal inspection and maintenance as described in claim 1, characterized in that: The outer shell (1) at the end of the water pump (211) is equipped with a filter box (4). The water pump (211) is connected to the inside of the filter box (4), and a filter screen (41) is fixed inside the filter box (4). A leak (42) is provided on the side of the filter box (4) that is connected to the inside of the outer shell (1).

5. The underground transformer substation housing for easy internal inspection and maintenance as described in claim 1, characterized in that: Handles (12) are fixed on both sides of the surface of the cover (11), and the handles (12) are fixed to the surface of the cover (11) by welding.

6. The underground transformer substation housing for easy internal inspection and maintenance as described in claim 4, characterized in that: The filter box (4) has an open structure on top and is located below the opening side of the outer shell (1).

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