Oil storage base and box transformer substation

Abstract

The utility model relates to the technical field of box transformer substation equipment, in particular to an oil storage base and a box transformer substation. The oil storage base comprises a base body, the base body is of a hollow structure, an inner cavity of the hollow structure forms a closed oil storage cavity, a surrounding edge is arranged at the position, corresponding to the position where the radiator is arranged, of the base body, the surrounding edge and the top wall of the base body form an oil pool, and the oil pool is provided with a control valve or provided with a communication opening and provided with a plugging piece. Communication and packing between the oil pool and the oil storage cavity are controlled; when rain and snow come, the oil pool and the oil storage cavity are communicated with each other through the control valve or the communication port and the plugging piece which are used in a matched mode, so that accident oil in the oil pool can flow into the oil storage cavity in time, and the accident oil in the oil pool is effectively prevented from being mixed with sundries such as rain and snow. Accident oil in the oil pool and the oil storage cavity can be conveniently recycled subsequently, the concept of circular economy is met, and maximum utilization of resources is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of box-type transformer equipment, in particular to an oil storage base and a box-type transformer. Background Art

[0002] In power systems, box-type substations (box-type substations) often utilize oil-immersed transformers, which offer excellent heat dissipation and high insulation performance. However, these transformers present a risk of oil leakage during faults. This is typically accomplished by placing an oil leak drum next to the box-type substation or installing an oil collection tank beneath the box-type transformer. This allows the transformer oil to drain into the drum or tank during a fault, preventing the spread of oil contamination. However, the oil leak drum increases the overall footprint of the box-type substation, while the oil collection tank requires the box-type substation to be elevated. Raising the box-type substation to accommodate a sunken oil collection tank can exacerbate foundation instability and even cause the box-type substation to tilt or sink. This is particularly true if the box-type substation is located in a subsidence area or in permafrost, where thawing can cause foundation settlement. Furthermore, in subsidence areas, foundations are susceptible to subsidence due to fluctuating groundwater levels and high soil compressibility. This instability poses a serious threat to the bearing capacity of the foundation, making it even more difficult to ensure the stability and safety of the box-type substation if a sunken oil collection tank is used.

[0003] Existing technologies such as the utility model patent with authorization announcement number CN215644010U disclose an emergency oil storage base for new energy transformers, including an oil storage base skeleton and a lower sealing plate. The oil storage base skeleton is welded with profiled channel steel to form a multi-grid frame structure with an overall rectangular shape. Multiple cavities are formed between the channel steels. Excluding the wiring cavities provided in the high-voltage chamber area and the low-voltage chamber area, the remaining cavities of the skeleton frame structure form oil storage cavities. A lower sealing plate is provided at the lower end of the oil storage cavity. The connection between the lower sealing plate and the channel steel is sealed to form a multi-grid oil storage cavity that can store oil. An oil and water baffle is fixedly provided under the plate radiator of the oil-immersed transformer. A vertical retaining edge is provided on the outer edge of the oil and water baffle. The retaining edge forms a surrounding edge with the bottom of the transformer. In the event of oil leakage from the radiator, the oil and water baffle can catch part of the leaked radiator oil to prevent transformer oil from directly leaking onto the ground near the transformer and causing environmental pollution.

[0004] However, in actual use, if rain or snow occurs, the leaked oil from the radiator on the oil and water baffle will mix with the rain and snow, resulting in an oil-water mixture on the oil and water baffle. This will affect the recovery of the leaked oil and cause resource waste. Furthermore, the oil and water baffle can only catch part of the leaked oil. If not handled promptly, the leaked oil from the radiator will still leak onto the ground near the transformer, causing environmental pollution. Therefore, it cannot be used in areas with strict environmental protection requirements. Utility Model Content

[0005] The purpose of the present utility model is to provide an oil storage base to solve the problem in the prior art that when the oil storage base encounters rainy and snowy weather, the accident oil leaked from the radiator due to a malfunction will mix with the rain and snow, affecting the recovery and processing of the accident oil, causing waste of resources, and if not handled in time, the leaked oil from the radiator will be missed on the ground near the box transformer and cause environmental pollution; The purpose of the present utility model is to provide a box transformer to solve the problem in the prior art that when the oil storage base encounters rainy and snowy weather, the accident oil leaked from the radiator due to a malfunction will mix with the rain and snow, affecting the recovery and processing of the accident oil, causing waste of resources, and if not handled in time, the leaked oil from the radiator will be missed on the ground near the box transformer and cause environmental pollution.

[0006] To achieve the above-mentioned purpose, the technical solution of the oil storage base provided by the utility model is: it includes a base body, the base body is a hollow structure, the inner cavity of the hollow structure constitutes a closed oil storage cavity, and a peripheral edge is provided on the base body corresponding to the position for arranging the radiator, and the peripheral edge and the top wall of the base body constitute an oil pool. The oil pool is provided with a control valve, or a connecting port is opened and a sealing part is configured to control the communication and isolation between the oil pool and the oil storage cavity.

[0007] As a further improvement, an oil pool liquid level monitoring device is provided in the oil pool for detecting the liquid level height of the oil pool.

[0008] As a further improvement, an oil storage cavity liquid level detection device is provided in the oil storage cavity for detecting the liquid level height of the oil storage cavity.

[0009] As a further improvement, both the oil storage cavity and the oil pool are provided with liquid discharge structures for respectively discharging the liquid in the oil storage cavity and the oil pool.

[0010] As a further improvement, the liquid discharge structure is a liquid discharge valve respectively provided on the oil storage chamber and the oil pool.

[0011] The beneficial effect is: the utility model improves the existing emergency oil storage base for box transformers, and the connection or closure between the oil pool and the oil storage cavity can be selected according to needs. The oil pool can collect the emergency oil leaked from the radiator when the radiator fails, and before rain and snow are about to come, the oil pool and the oil storage cavity are connected to each other through the control valve or the matching connecting port and sealing part, so that the emergency oil in the oil pool can flow into the oil storage cavity in time, thereby effectively preventing the emergency oil on the oil pool from mixing with rain, snow and other debris, and facilitating the subsequent recovery and treatment of the emergency oil in the oil pool and the oil storage cavity, which is in line with the concept of circular economy and realizes the maximum utilization of resources.

[0012] Moreover, by connecting the oil pool with an oil storage chamber whose design capacity is much larger than that of the oil pool, the accident oil in the oil pool can flow into the oil storage chamber. Compared with the existing technology that can only connect the oil briefly, this reduces the risk of accident oil leaking into the environment, provides more time and space for emergency response, and helps to reduce the severity and scope of the fault.

[0013] To achieve the above-mentioned purpose, the technical solution of the box transformer provided by the present invention is: it includes an oil-immersed transformer, and an oil storage base is provided at the bottom of the oil-immersed transformer. The oil storage base includes a base body, the base body is a hollow structure, and the inner cavity of the hollow structure constitutes a closed oil storage cavity. A peripheral edge is provided on the base body corresponding to the position for arranging the radiator, and the peripheral edge and the top wall of the base body constitute an oil pool. The oil pool is provided with a control valve, or a connecting port is opened and a sealing member is configured to control the communication and isolation between the oil pool and the oil storage cavity.

[0014] As a further improvement, an oil pool liquid level monitoring device is provided in the oil pool for detecting the liquid level height of the oil pool.

[0015] As a further improvement, an oil storage cavity liquid level detection device is provided in the oil storage cavity for detecting the liquid level height of the oil storage cavity.

[0016] As a further improvement, both the oil storage cavity and the oil pool are provided with liquid discharge structures for respectively discharging the liquid in the oil storage cavity and the oil pool.

[0017] As a further improvement, the liquid discharge structure is a liquid discharge valve respectively provided on the oil storage chamber and the oil pool.

[0018] The beneficial effect is that the present invention improves the oil storage base in the existing box-type transformer. The oil pool and the oil storage cavity can be connected or closed according to needs. The oil pool can collect the accident oil leaked from the radiator when a radiator fails. Before rain or snow is about to come, the oil pool and the oil storage cavity are connected to each other by controlling the valve or the matching connecting port and blocking member, so that the accident oil in the oil pool can flow into the oil storage cavity in time, thereby effectively preventing the accident oil on the oil pool from mixing with rain, snow and other debris, and facilitating the subsequent recovery and treatment of the accident oil in the oil pool and the oil storage cavity, which conforms to the concept of circular economy and realizes the maximum utilization of resources.

[0019] Moreover, by connecting the oil pool with an oil storage chamber whose design capacity is much larger than that of the oil pool, the accident oil in the oil pool can flow into the oil storage chamber. Compared with the existing technology that can only connect the oil briefly, this reduces the risk of accident oil leaking into the environment, provides more time and space for emergency response, and helps to reduce the severity and scope of the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A three-dimensional structural diagram of an embodiment of a box-type transformer provided by the present utility model;

[0021] Figure 2 for Figure 1 A three-dimensional structural diagram from one of the perspectives;

[0022] Figure 3 for Figure 1 A three-dimensional structural diagram from another perspective;

[0023] Figure 4 A front view of an embodiment of a box-type transformer provided by the present utility model;

[0024] Figure 5 A side view of an embodiment of a box-type transformer provided by the present utility model;

[0025] Figure 6 A top view of an embodiment of a box-type transformer provided by the present utility model;

[0026] In the figure: 1. Oil-immersed transformer; 2. Oil drain valve; 3. Oil storage base; 4. Base lifting lug; 5. Ball valve; 6. Radiator; 7. Manual valve; 8. Edge; 9. High-voltage bushing; 10. Indoor oil leakage plate; 11. Cable channel; 12. Indoor bottom plate of box-type transformer; 13. High-voltage chamber; 14. Low-voltage chamber; 15. Low-voltage bushing. DETAILED DESCRIPTION

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] When the oil-immersed transformer in the box transformer fails, the transformer oil will leak. Although the existing technology cited in the background technology does not need to take up too much ground space and has low requirements for the foundation, once it encounters rainy and snowy weather, the rain and snow will mix with the accident oil caught on the oil and water baffles, which will affect the recycling of the accident oil leaked from the radiator and cause waste of resources. In addition, when the radiator fails and leaks oil, it can only rely on its oil and water baffles to temporarily catch part of the leaked oil. If it is not handled in time, the accident oil exposed by the radiator will still be missed on the ground near the box transformer, causing environmental pollution, and it cannot be used at all in some areas with high environmental protection requirements.

[0029] Based on this, the present invention provides an oil storage base and a box transformer that are improved on the existing technology to solve the problems existing in the above-mentioned existing technology.

[0030] The overall design concept of the box-type transformer provided by the utility model is:

[0031] like Figures 1-6As shown, an oil storage base 3 is provided at the bottom of the box transformer, and the oil storage base 3 includes a base body. The inner cavity of the base body constitutes a closed oil storage cavity, which is used to accommodate the accident oil leaked when the oil-immersed transformer 1 fails. A peripheral edge 8 is provided on the base body at the edge corresponding to the arrangement position of the radiator 6. The peripheral edge 8 and the top wall of the base body constitute an oil pool. The oil pool can carry the accident oil leaked when the radiator 6 fails, and a control valve is provided on the oil pool, or a connecting port is opened and a sealing member is configured. During the actual use of the box transformer, the oil pool and the oil storage cavity can be sealed with each other by using the control valve or the matching connecting port and sealing member, so that the accident oil leaked when the radiator 6 fails is collected by the oil pool. Before the arrival of rain and snow, the operator can operate the control valve or make the sealing part no longer block the connecting port to achieve mutual communication between the oil pool and the oil storage chamber, so that the accident oil on the oil pool flows into the oil storage chamber, which can effectively prevent the accident oil on the oil pool from mixing with rain and snow, thereby facilitating the subsequent recovery and treatment of the accident oil in the oil pool and the oil storage chamber, and then operate the control valve or make the sealing part block the connecting port, so that rain and snow fall on the oil pool and will no longer mix with the accident oil, which can effectively avoid the situation where rain and snow mix with the accident oil.

[0032] The oil storage base 3 in the box transformer provided by the present invention can be connected or closed between the oil pool and the oil storage chamber as needed, so as to flexibly respond to different situations. When the oil pool and the oil storage chamber are connected, when there is a large amount of accident oil in the oil pool, the accident oil in the oil pool can flow into the oil storage chamber and be stored in the oil storage chamber, thereby gaining more processing time for emergency response and saving the number of times the accident oil in the oil pool is specially transferred and processed. It not only prevents the accident oil from overflowing from the oil pool into the surrounding land, but also reduces the risk of environmental pollution. The design of the oil storage base 3 not only provides an effective measure to deal with radiator 6 failures, but also enables operators to easily manage the accident oil under different environmental conditions through its flexible control mechanism.

[0033] Based on the above overall introduction to the box-type transformer of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0034] A high-voltage chamber 13, a low-voltage chamber 14 and an oil-immersed transformer 1 are arranged above the oil storage base 3 of the box transformer. The oil-immersed transformer 1 includes an oil tank with an oil drain valve 2 provided on the side wall, a radiator 6, a high-voltage bushing 9 of the transformer and a low-voltage bushing 15 of the transformer. During normal operation, the high-voltage winding and the low-voltage winding in the oil tank body will generate heat after passing current. The transformer insulating oil filled in the oil tank can be cooled by heat exchange through the radiator 6.

[0035] The oil storage base 3 includes a base body, which is a frame structure formed by fully welding the top plate, bottom plate and side plates to match the size of the bottom of the box transformer. The inner cavity of the frame structure forms a closed oil storage cavity for storing emergency oil. The outside of the oil storage base 3 is provided with a base lifting lug 4, which can facilitate the transportation of the oil storage base 3 during the processing process. At the same time, the oil-immersed transformer 1 of the box transformer is also provided with a lifting lug, which can be used for the transportation of the box transformer as a whole after the box transformer is assembled.

[0036] The oil storage base 3 integrates the oil storage cavity into the base body, making full use of the vertical space, making the entire box-type transformer structure more compact, and reducing the occupation of external space. In addition, the oil storage base 3 adopts a frame structure welded with channel steel. Compared with traditional concrete oil storage facilities, it is lighter, so that the static load and dynamic load that the foundation needs to bear are relatively small, thereby reducing the requirements for foundation stability and bearing capacity, which not only saves construction costs but also shortens construction period.

[0037] In addition, the oil storage base 3 can be prefabricated and assembled at the box transformer manufacturer. The oil storage base 3 made of fully welded channel steel has a stable structure and can meet the oil storage needs of transformers of different capacities by changing the length, width and height. The closed oil storage cavity design can effectively prevent oil leakage. The prefabricated oil storage base 3 reduces on-site welding, debugging and other processes, and can be directly installed on site, thereby shortening the construction period of the overall project.

[0038] The edge 8 is arranged at the location where the radiator 6 is arranged. Specifically, the edge 8 is arranged around the bottom of the radiator 6. In this embodiment, the radiator 6 and the oil tank body are arranged side by side. The edge 8 can be arranged around the radiator 6 from the side of the radiator 6 facing away from the oil tank body. In order to further increase the capacity of the oil pool, in a more preferred embodiment, the edge 8 is arranged close to the edge of the base body. In this case, the bottom area of ​​the oil pool formed by the edge 8 and the base body is maximized, thereby forming an oil pool with a larger capacity. Figure 2 and Figure 5 As shown, the surrounding edge 8 is connected to the wall surface of the high-pressure chamber 13 and the wall surface of the oil tank body, and then together with the top plate of the base body, forms an oil pool.

[0039] Based on the above overall introduction to the box-type transformer of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0040] This embodiment focuses on a detailed description of how to better control the communication and isolation between the oil pool and the oil storage cavity.

[0041] A control valve is provided on the oil pool to control the connection and isolation between the oil pool and the oil storage chamber. Figure 1 and Figure 2As shown, the control valve is a manual valve 7 installed on the oil sump. When the manual valve 7 is opened, the emergency oil in the oil sump can flow into the oil storage chamber. A communication port can also be provided on the top wall of the oil storage chamber. The communication port is equipped with a plugging member. The communication port will serve as an outlet for the emergency oil to flow out of the oil sump, allowing the oil in the oil sump to flow into the oil storage chamber. The plugging member is a sealing plug that is adapted to and tightly fits the communication port. More specifically, the plugging member is a rubber plug or rubber plug. The operator can achieve communication or isolation between the oil sump and the oil storage chamber by simply plugging and unplugging.

[0042] In other embodiments, the blocking member is a reversible plate installed at the communication port. When the communication port needs to be closed, the plate flips to close the opening; when communication is required, the plate flips to open. Alternatively, a sliding gate can be installed at the communication port. When communication is required, the gate can slide to one side to open the communication port, and when the gate needs to be closed, the gate slides to close the communication port. Alternatively, an electric damper can be installed at the communication port, and its opening and closing can be controlled by a motor.

[0043] More preferably, the control valve or communication port is located near the edge of the oil reservoir roof to facilitate routine maintenance and inspection. Compared to a communication port located in the center of the oil reservoir roof, when the communication port is located at the edge, only a slight tilt of the tank is required, and the accident oil in the oil pool can flow into the oil reservoir more quickly.

[0044] Based on the above overall introduction to the box-type transformer of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0045] The oil sump is equipped with an oil level monitoring device to detect the oil level. This device monitors the level of the accident oil in the sump in real time, helping to promptly detect any accumulation of accident oil. When the accident oil level reaches a predetermined level, an early warning is issued, notifying operators to take corrective action. Operators can either drain the accident oil from the sump into the oil storage chamber or directly transfer it for disposal. This prevents accident oil spills, which could cause environmental pollution and safety hazards. Furthermore, based on data from the oil sump level monitoring device, operators can more accurately formulate oil drainage plans, avoiding unnecessary frequent inspections and ensuring that the accident oil does not accumulate to dangerous levels.

[0046] The oil sump level monitoring device is specifically a float switch installed in the oil sump. When the emergency oil level rises or falls, the float moves accordingly to monitor the level. In other embodiments, the oil sump level monitoring device is an ultrasonic level sensor or a capacitive level sensor installed on the side wall of the oil sump to accurately measure the height of the emergency oil level in the oil sump.

[0047] In order to further facilitate the management of accident oil, an oil storage chamber liquid level detection device is provided in the oil storage chamber for detecting the liquid level height of the oil storage chamber. The oil storage chamber liquid level detection device is a float switch arranged in the oil storage chamber, or an ultrasonic liquid level sensor or a capacitive liquid level sensor installed on the top wall or side wall of the oil storage chamber, so that the operator can monitor the liquid level height of the accident oil collected in the oil storage chamber. When the accident oil is about to fill the oil storage chamber, the operator can transfer the accident oil in the oil storage chamber for recycling.

[0048] Both the oil reservoir and the oil sump are equipped with drain mechanisms, which allow the liquid in each to be drained. These drain mechanisms are outlet valves installed on the oil reservoir and the oil sump. In this embodiment, ball valves 5 are installed on the sidewalls of the base body and the oil sump, and the two ball valves 5 are arranged close together. The ball valves 5 can be manually opened and closed, allowing operators to quickly drain the oil reservoir and the oil sump. Alternatively, drain pipes equipped with valves can be connected between the base body and the oil sump to facilitate the operator's removal of accidental oil to a designated location.

[0049] Based on the above overall introduction to the box-type transformer of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:

[0050] This embodiment focuses on the detailed description of the accident oil collection in the high-pressure chamber and the low-pressure chamber.

[0051] The high voltage panel of the oil-immersed transformer 1 and the cover plate of the box transformer form a high voltage chamber 13, and the low voltage panel and the cover plate of the box transformer form a low voltage chamber 14. The two compartments are separated by a partition and are not connected to each other. On the basis of the frame structure formed by full welding of the top plate, bottom plate and side plate, as shown in the following figure: Figure 2 and Figure 3 As shown, to facilitate wiring, a cable channel 11 separated from the oil storage chamber is formed by welding within the frame structure, and an indoor oil leakage plate 10 can be welded to the bottom of the corresponding high-pressure chamber 13 and low-pressure chamber 14 in contact with the indoor bottom plate 12 of the box transformer. In the event of oil leakage from the high-pressure bushing 9 or the low-pressure bushing 15, the accident oil can be drained into the oil storage base 3. Of course, in other embodiments, during the manufacturing process of the base body, a hole can be punched in the top plate to form an oil leakage hole, so that the accident oil can enter the oil storage chamber through the oil leakage hole.

[0052] The specific structure of the oil storage base in the embodiment of the present utility model is the same as the structure of the oil storage base in the embodiment of the box-type transformer introduced above, and will not be described in detail herein.

[0053] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0054] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. An oil storage base, comprising a base body, the base body being a hollow structure, the inner cavity of the hollow structure constituting a closed oil storage cavity, a peripheral edge being provided on the base body at a position corresponding to the position for arranging the radiator, the peripheral edge and the top wall of the base body constituting an oil pool, wherein: The oil pool is provided with a control valve, or a communication port is opened and equipped with a blocking piece to control the communication and isolation between the oil pool and the oil storage cavity.

2. The oil storage base according to claim 1, characterized in that: An oil pool liquid level monitoring device is provided in the oil pool to detect the liquid level height of the oil pool.

3. The oil storage base according to claim 1, characterized in that: An oil storage cavity liquid level detection device is provided in the oil storage cavity for detecting the liquid level height of the oil storage cavity.

4. The oil storage base according to any one of claims 1 to 3, characterized in that: The oil storage cavity and the oil pool are both provided with a liquid discharge structure for respectively discharging the liquid in the oil storage cavity and the oil pool.

5. The oil storage base according to claim 4, characterized in that: The liquid discharge structure is a liquid discharge valve respectively arranged on the oil storage cavity and the oil pool.

6. A box-type transformer, comprising an oil-immersed transformer, wherein an oil storage base is provided at the bottom of the oil-immersed transformer, the oil storage base comprising a base body, the base body being a hollow structure, the inner cavity of the hollow structure constituting an oil storage cavity, a peripheral edge being provided on the base body at a position corresponding to the position for arranging a radiator, the peripheral edge and the top wall of the base body constituting an oil pool, wherein the box-type transformer is characterized by: The oil pool is provided with a control valve, or a communication port is opened and equipped with a blocking piece to control the communication and isolation between the oil pool and the oil storage cavity.

7. The box-type transformer according to claim 6 is characterized in that: An oil pool liquid level monitoring device is provided in the oil pool to detect the liquid level height of the oil pool.

8. The box-type transformer according to claim 6 is characterized in that: An oil storage cavity liquid level detection device is provided in the oil storage cavity for detecting the liquid level height of the oil storage cavity.

9. The box-type transformer according to any one of claims 6 to 8, characterized in that: The oil storage cavity and the oil pool are both provided with a liquid discharge structure for respectively discharging the liquid in the oil storage cavity and the oil pool.

10. The box-type transformer according to claim 9 is characterized in that: The liquid discharge structure is a liquid discharge valve respectively arranged on the oil storage cavity and the oil pool.

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