Oil-immersed transformer accident oil pool and oil-immersed transformer equipment

Abstract

The utility model provides an oil-immersed transformer accident oil pool and oil-immersed transformer equipment. The oil-immersed transformer accident oil pool comprises an oil pool foundation, an overflow cavity, a liquid inlet and a liquid outlet are defined, the liquid inlet and the liquid outlet are communicated with the overflow cavity, and a cooling structure used for cooling an oil-water mixture is arranged in the overflow cavity; the oil-water separation pool comprises a box body positioned below the oil pool foundation and an isolation structure arranged in the box body; the collecting tank is provided with a collecting chamber; the communicating structure comprises a water drainage pipe and a liquid drainage pipe which are arranged in the vertical direction in a spaced mode, the water drainage pipe is located above the liquid drainage pipe, one end of the water drainage pipe and one end of the liquid drainage pipe communicate with the temporary storage cavity, the other end of the water drainage pipe and the other end of the liquid drainage pipe communicate with the collecting cavity, and a switch component used for controlling the liquid drainage pipe to be connected or disconnected is arranged on the liquid drainage pipe. According to the technical scheme, the problems that in the prior art, oil in an accident pool is directly discharged, so that environment pollution is caused, and a liquid discharging pipeline is damaged due to high temperature are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of an oil-immersed transformer accident oil pool, in particular to an oil-immersed transformer accident oil pool and oil-immersed transformer equipment. Background Art

[0002] Box-type (oil-immersed) transformers are often used in industrial production processes. When a transformer fails, oil may spray out or leak. In the prior art, a simple emergency oil pool is usually set under the box-type transformer to receive the oil leaked when the transformer fails. The oil is discharged into the wild through the simple emergency pool, which will cause soil and water pollution. At the same time, since the oil leaked from the transformer has a high temperature, direct discharge will cause damage to the drainage pipe and there is a safety hazard of causing fire. Utility Model Content

[0003] The main purpose of the utility model is to provide an oil-immersed transformer accident oil pool and oil-immersed transformer equipment to solve the environmental pollution problems caused by direct discharge of oil from the accident pool in the prior art and the problem of damage to the drainage pipeline due to high temperature.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an oil-immersed transformer accident oil pool, comprising: an oil pool foundation, defining a flow chamber and a liquid inlet and a liquid outlet communicated with the flow chamber, wherein a cooling structure for cooling the oil-water mixture is arranged in the flow chamber; an oil-water separation pool, comprising a box body located below the oil pool foundation and an isolation structure arranged in the box body, wherein one end of the isolation structure is connected to the bottom wall of the flow chamber, and the other end of the isolation structure is spaced apart from the bottom wall of the box body, so as to separate the inside of the box body into interconnected separation zones. A separation chamber and a buffer chamber, the separation chamber is connected to the liquid outlet; a collecting tank, having a collecting chamber; a connecting structure, including a drain pipe and a liquid discharge pipe arranged at intervals in the vertical direction, the drain pipe is located above the liquid discharge pipe, one end of the drain pipe and the liquid discharge pipe are both connected to the buffer chamber, and the other ends of the drain pipe and the liquid discharge pipe are both connected to the collecting chamber, and a switch component for controlling the on-off of the drain pipe is provided on the liquid discharge pipe, so that the lower layer of wastewater formed after the oil-water mixture is statically stratified in the separation chamber can flow into the collecting chamber through the buffer chamber and the drain pipe in sequence.

[0005] Furthermore, the drain pipe is obliquely arranged between the box body and the collection tank, the liquid inlet end of the drain pipe is higher than the liquid outlet end of the drain pipe, and the switch component is arranged at the liquid outlet end; and / or, the water drain pipe is obliquely arranged between the box body and the collection tank, and the water inlet end of the drain pipe is higher than the water outlet end of the drain pipe.

[0006] Furthermore, at least one of the liquid drain pipe and the water discharge pipe has an angle A with the horizontal plane, and the angle A is greater than or equal to 2° and less than or equal to 5°.

[0007] Furthermore, the outer periphery of the liquid drain pipe and / or the water discharge pipe is provided with a rigid waterproof sleeve.

[0008] Furthermore, the oil pool foundation is a cylindrical structure with a through hole, and the cylindrical structure includes: a basic cylinder section, which is made of concrete material, and the upper end of the basic cylinder section forms a liquid inlet; a guide cylinder section, which is connected to the lower end of the basic cylinder section, and the cross-sectional area of ​​the guide cylinder section gradually decreases from top to bottom, and the inner wall of the guide cylinder section forms the bottom wall of the flow chamber, and the end of the guide cylinder section away from the basic cylinder section forms a liquid outlet.

[0009] Furthermore, the isolation structure includes: an isolation wall, located in the box body; a guide plate, located at the upper end of the box body, the guide plate is inclined relative to the isolation wall, and from top to bottom, the distance between the guide plate and the central axis of the through hole decreases, and part of the oil-water mixture in the flow chamber flows into the separation chamber through the guide plate; wherein, the isolation wall is arranged in a vertical direction, one end of the isolation wall is connected to the bottom wall of the flow chamber through the guide plate, and the other end of the isolation wall is spaced apart from the bottom wall of the box body.

[0010] Furthermore, the bottom wall of the box body has an inclined surface, and under the action of gravity, the wastewater and / or oil in the separation chamber flows into the buffer chamber through the inclined surface.

[0011] Furthermore, a drain port communicating with the cache chamber is provided on the side wall of the box body, the drain port is located at the bottom of the cache chamber, and the drain pipe is communicated with the cache chamber through the drain port.

[0012] Furthermore, the cooling structure includes: a support member located in the flow chamber, the support member is connected to the oil pool foundation, and a plurality of flow channels are arranged at intervals on the support member; at least one layer of pebbles is laid on the support member to cool the oil-water mixture.

[0013] According to another aspect of the utility model, the utility model provides an oil-immersed transformer device, comprising the above-mentioned oil-immersed transformer accident oil pool and an oil-immersed transformer arranged on the basis of the oil pool.

[0014] By applying the technical solution of the utility model, a certain amount of cooling water is reserved in the box body, and the switch component is closed so that the drain pipe is not connected to the collection tank. When an accident occurs in the transformer and causes oil leakage, the oil can enter the flow chamber through the liquid inlet. After being cooled by the cooling structure, the oil enters the separation chamber through the liquid outlet and mixes with the cooling water in the separation chamber to form an oil-water mixture and is divided into an upper layer of oil and a lower layer of waste water. After the oil enters the separation chamber and causes the liquid level to rise, due to the communicating vessel principle, the lower layer of waste water in the separation chamber will enter the buffer chamber through the gap between the isolation structure and the bottom wall of the box body. Thereby, the liquid level in the cache chamber will also rise, and then some of the lower layer of wastewater in the cache chamber can flow into the collection chamber through the drain pipe. When the wastewater level in the cache chamber is lower than the drain pipe, the lower layer of wastewater no longer flows to the collection chamber. At this time, the staff can pump out the wastewater in the collection pool, and after the oil-water mixture has been allowed to stand and cool down in the box for a period of time, the switch component is turned on to allow the oil-water mixture in the box to flow into the collection chamber through the drain pipe. After the oil-water mixture has completely flowed into the collection chamber and stood and separated, the staff uses a submersible sewage pump to suck and recover the oil and wastewater in turn. Through the above-mentioned arrangement, on the one hand, the oil can enter the box and contact with the cooling water, thereby reducing the oil temperature. Among them, the waste water is first discharged into the collection chamber through the drain pipe, which can prevent the high-temperature oil from directly entering the pipeline and causing damage to the pipeline. Then, the oil-water mixture is allowed to stand in an additional box, which can further reduce the oil temperature to avoid damage to the drain pipe when the high-temperature oil is discharged, and can also avoid fires caused by high-temperature oil. On the other hand, by setting up a collection pool to collect the oil, the oil can be recovered after standing and cooling in the collection pool, which can not only avoid the pollution of soil and water bodies caused by direct discharge of oil into the field, but also avoid fire accidents caused by oil discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A structural schematic diagram of an embodiment of an oil-immersed transformer accident oil pool of the utility model is shown;

[0017] Figure 2 Shows Figure 1 The main view of the oil-immersed transformer accident oil pool;

[0018] Figure 3 Shows Figure 2 A partial enlarged view of the oil-immersed transformer accident oil pool;

[0019] Figure 4 Shows Figure 1Right view of the oil-immersed transformer accident oil pool;

[0020] Figure 5 Shows Figure 1 Schematic diagram of the structure of the grille of the oil-immersed transformer accident oil pool.

[0021] The above drawings include the following reference numerals:

[0022] 10. Oil pool foundation; 11. Cooling structure; 12. Foundation cylinder section; 13. Guide cylinder section; 14. Support member; 15. Pebbles; 16. Grille; 17. Support foundation; 18. Bolts; 21. Box; 22. Isolation structure; 23. Isolation wall; 24. Guide plate; 30. Collection tank; 31. Steel ladder; 41. Drain pipe; 42. Drain pipe; 43. Switch member; 44. Filter. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figures 1 to 5 As shown, an embodiment of the utility model provides an oil-immersed transformer accident oil pool. The oil-immersed transformer accident oil pool includes an oil pool base 10, an oil-water separation pool, a collection pool 30 and a connecting structure. Among them, the oil pool base 10 defines a flow chamber and a liquid inlet and a liquid outlet connected to the flow chamber, and a cooling structure 11 for cooling the oil-water mixture is provided in the flow chamber; the oil-water separation pool includes a box body 21 located below the oil pool base 10 and an isolation structure 22 arranged in the box body 21, one end of the isolation structure 22 is connected to the bottom wall of the flow chamber, and the other end of the isolation structure 22 is spaced from the bottom wall of the box body 21 to divide the inside of the box body 21 into a separation chamber and a buffer chamber that are connected, and the separation chamber is connected to the liquid outlet. The collecting tank 30 has a collecting chamber; the connecting structure includes a drain pipe 41 and a drain pipe 42 which are arranged at intervals in the vertical direction, the drain pipe 41 is located above the drain pipe 42, one end of the drain pipe 41 and the drain pipe 42 are both connected to the buffer chamber, and the other ends of the drain pipe 41 and the drain pipe 42 are both connected to the collecting chamber, and a switch component 43 for controlling the on and off of the drain pipe 42 is provided on the drain pipe 42, so that the lower layer of wastewater formed after the oil-water mixture is allowed to stand and stratify in the separation chamber can flow into the collecting chamber through the buffer chamber and the drain pipe 41 in sequence.

[0025] In the above technical solution, by reserving a certain amount of cooling water in the box body 21, closing the switch component 43 so that the drain pipe 42 is not connected to the collection tank 30, when an accident occurs in the transformer and causes oil leakage, the oil can enter the flow chamber through the liquid inlet, and after being cooled by the cooling structure 11, the oil enters the separation chamber through the liquid outlet and mixes with the cooling water in the separation chamber to form an oil-water mixture and is divided into an upper layer of oil and a lower layer of waste water. After the oil enters the separation chamber and causes the liquid level to rise, due to the principle of communicating vessels, the lower layer of waste water in the separation chamber will enter the buffer chamber through the gap between the isolation structure 22 and the bottom wall of the box body 21, thereby The liquid level in the buffer chamber will also rise, so that part of the lower layer of wastewater in the buffer chamber can flow into the collection chamber through the drain pipe 41. When the wastewater level in the buffer chamber is lower than the drain pipe 41, the lower layer of wastewater no longer flows to the collection chamber. At this time, the staff can pump out the wastewater in the collection tank 30, and after the oil-water mixture has been allowed to stand and cool down in the box 21 for a period of time, the switch component 43 is turned on to allow the oil-water mixture in the box 21 to flow into the collection chamber through the drain pipe 42. After the oil-water mixture has completely flowed into the collection chamber and has been allowed to stand and separate, the staff uses a submersible sewage pump to suck and recover the oil and wastewater in turn. Through the above-mentioned arrangement, on the one hand, the oil can enter the box 21 and contact with the cooling water, thereby reducing the temperature of the oil. Among them, the waste water is first discharged into the collection chamber through the drain pipe 41, which can prevent the high-temperature oil from directly entering the pipeline and causing damage to the pipeline. Then, the oil-water mixture is allowed to stand by the additionally arranged box 21, which can further reduce the temperature of the oil, so as to avoid damage to the drain pipe 42 when the high-temperature oil is discharged, and to avoid fire caused by the high-temperature oil. On the other hand, by setting up a collection tank 30 to collect the oil, the oil can be recovered in the collection tank 30 after being cooled and left to stand, thereby not only avoiding the pollution of soil and water bodies caused by the direct discharge of oil into the wild, but also avoiding fire accidents caused by the discharge of oil.

[0026] It should be noted that, in the embodiment of the present invention, the transformer chamber of the oil-immersed transformer is located above the oil pool foundation 10 .

[0027] It should be noted that in the embodiment of the present invention, a pit is dug in the ground to form the box body 21, and C30 concrete is poured to form the side walls and bottom walls of the box body 21. When the concrete reaches sufficient strength, a layer of concrete sealing and curing agent material is evenly applied on the concrete surface, and the sealing and curing agent material is allowed to penetrate 5mm-8mm into the concrete wall surface to improve the hardness and density of the side walls and bottom walls of the box body 21, and then the side walls and bottom walls of the box body 21 are polished and ground.

[0028] It should be noted that in the embodiment of the utility model, the height of the cooling water liquid level reserved in the box body 21 is level with the bottom of one end of the drain pipe 41 connected to the cache chamber to prevent the cooling water in the box body 21 from flowing out through the drain pipe 41.

[0029] Specifically, in the embodiment of the present invention, the volume of the box body 21 can accommodate more than 60% of the transformer oil in the corresponding transformer room.

[0030] Specifically, in the embodiment of the utility model, an inverted trapezoidal manhole cover with exhaust holes is provided above the collecting pool 30 (i.e., the cross-sectional area of ​​the manhole cover gradually decreases from top to bottom) to allow air to circulate in the collecting pool 30, thereby avoiding a pressure difference between the oil-water separation pool and the collecting pool 30; a steel ladder 31 is provided on the inner wall of the collecting pool 30 to facilitate staff to enter the collecting pool 30 to inspect and open and close the switch component 43.

[0031] Preferably, in the embodiment of the utility model, the box body 21 is a pool body with a square cross-section, the length of the box body 21 is 0.9m, the width is 0.9m, and the bottom of the box body 21 connected to the drainage pipe 42 is 0.8m high from the top of the box body 21.

[0032] Preferably, in the embodiment of the present invention, the thickness of the side wall and the bottom wall of the box body 21 is 120 mm.

[0033] Preferably, in the embodiment of the present invention, the collection pool 30 is in the shape of a cube, and the collection pool 30 is 1.5 m long, 1.5 m wide, and 1.5 m high.

[0034] Preferably, in the embodiment of the present invention, the side wall and the bottom wall of the collection tank 30 are cast by C30 concrete, and the thickness thereof is 120 mm.

[0035] Preferably, in the embodiment of the present invention, the distance between the oil pool foundation 10 and the collection pool 30 is 5 m.

[0036] like Figure 2 As shown, in the embodiment of the utility model, the drain pipe 42 is obliquely arranged between the box body 21 and the collection tank 30, the liquid inlet end of the drain pipe 42 is higher than the liquid outlet end of the drain pipe 42, and the switch component 43 is arranged at the liquid outlet end.

[0037] In the above technical solution, when an accident occurs in the transformer, the drain pipe 42 is filled with cooling water, the switch component 43 is in a closed state, and the oil enters the box body 21 and is cooled by standing. Then, the switch component 43 is opened, and the oil-water mixture in the box body 21 can flow to the collection tank 30 through the drain pipe 42 by gravity. In this way, it is possible to avoid setting up an additional power mechanism to make the oil-water mixture flow, thereby reducing production costs.

[0038] It should be noted that in the embodiment of the utility model, a filter screen 44 is provided at the connection end between the drain pipe 42 and the collection chamber. After the staff uses the submersible sewage pump to suck and recover the oil and wastewater in sequence, the filter screen 44 needs to be replaced. In this way, pebbles and debris can be prevented from entering the collection pool at the same time to hinder the subsequent extraction and recovery operations.

[0039] Preferably, in the embodiment of the present invention, the filter screen 44 is a 10-mesh galvanized iron grid filter screen.

[0040] Preferably, in the embodiment of the utility model, the switch component 43 is a stop valve, and the drain pipe 42 can be connected to the collection chamber by opening the stop valve; and the drain pipe 42 can be disconnected from the collection chamber by closing the stop valve.

[0041] Preferably, in the embodiment of the present invention, the drain pipe 42 is a metal pipe with an inner diameter not less than 100 mm.

[0042] like Figure 2 As shown, in the embodiment of the present utility model, the drain pipe 41 is obliquely arranged between the box body 21 and the collection tank 30 , and the water inlet end of the drain pipe 41 is higher than the water outlet end of the drain pipe 41 .

[0043] Through the above arrangement, wastewater can flow from the box body 21 to the collection tank 30 through the drain pipe 41 by gravity.

[0044] Preferably, in the embodiment of the present invention, the drain pipe 41 is a metal pipe with an inner diameter not less than 100 mm.

[0045] like Figure 2 As shown, in the embodiment of the utility model, the drain pipe 41 has an angle A with the horizontal plane, and the angle A is greater than or equal to 2° and less than or equal to 5°. In this way, on the one hand, the wastewater can flow from the box 21 to the collection tank 30 through the drain pipe 41 by gravity, and on the other hand, the end of the drain pipe 41 connected to the collection tank 30 can be prevented from being buried too deep.

[0046] Preferably, in the embodiment of the present invention, the angle A between the drain pipe 41 and the horizontal plane is 2°.

[0047] like Figure 2 As shown, in the embodiment of the utility model, the drain pipe 42 has an angle A with the horizontal plane, and the angle A is greater than or equal to 2° and less than or equal to 5°. In this way, on the one hand, the oil-water mixture can flow from the box body 21 to the collection tank 30 through the drain pipe 42 by gravity, and on the other hand, it can avoid the end of the drain pipe 42 connected to the collection tank 30 from being buried too deep.

[0048] Preferably, in the embodiment of the present invention, the angle A between the drain pipe 42 and the horizontal plane is 2°.

[0049] like Figure 2 As shown, in the embodiment of the utility model, the outer periphery of the drain pipe 41 is provided with a rigid waterproof sleeve.

[0050] Through the above-mentioned arrangement, the rigid waterproof casing can protect the drain pipe 41. On the one hand, it can prevent the drain pipe 41 from being subjected to excessive pressure due to the excessive burial depth of the drain pipe 41, thereby preventing the drain pipe 41 from being deformed and damaged due to excessive external pressure. On the other hand, the rigid waterproof casing can provide waterproof and anti-corrosion effects for the drain pipe 41.

[0051] Preferably, in the embodiment of the present invention, the rigid waterproof casing on the outer periphery of the drain pipe 41 is a steel pipe with an additional wing ring.

[0052] like Figure 2 As shown, in the embodiment of the present utility model, the outer periphery of the drain pipe 42 is provided with a rigid waterproof sleeve.

[0053] Through the above-mentioned arrangement, the rigid waterproof casing can protect the drain pipe 42. On the one hand, it can prevent the drain pipe 42 from being subjected to excessive pressure due to the excessive burial depth of the drain pipe 42, thereby preventing the drain pipe 42 from being deformed and damaged due to excessive external pressure. On the other hand, the rigid waterproof casing can provide waterproof and anti-corrosion effects for the drain pipe 42.

[0054] Preferably, in the embodiment of the present invention, the rigid waterproof casing on the outer periphery of the drain pipe 42 is a steel pipe with an additional wing ring.

[0055] like Figure 2 As shown, in the embodiment of the utility model, the oil pool foundation 10 is a cylindrical structure with a through hole, and the cylindrical structure includes: a basic cylinder section 12, which is made of concrete material, and the upper end of the basic cylinder section 12 forms a liquid inlet; a guide cylinder section 13, which is connected to the lower end of the basic cylinder section 12, and the cross-sectional area of ​​the guide cylinder section 13 gradually decreases from top to bottom, and the inner wall of the guide cylinder section 13 forms the bottom wall of the flow chamber, and the end of the guide cylinder section 13 away from the basic cylinder section 12 forms a liquid outlet.

[0056] In the above technical solution, by setting the liquid inlet formed by the basic cylinder section 12, the oil can enter the flow chamber through the transformer chamber through the liquid inlet, and under the action of gravity, the oil can enter the liquid outlet through the inner wall of the guide cylinder section 13, so that the oil can be prevented from being retained in the transformer chamber, thereby avoiding a fire caused by the high temperature of the oil or preventing the fire from further expanding.

[0057] It should be noted that, in the embodiment of the utility model, an embedded part is provided at the top of the side wall of the box body 21, and the embedded part is provided with a fixing hole. A mounting hole is correspondingly provided at the position of the guide tube segment 13 close to the side wall of the box body. By providing a bolt 18 and passing the bolt 18 through the mounting hole and the fixing hole in sequence, the guide tube segment 13 can be fixedly connected to the side wall of the box body 21. Preferably, the bolt 18 is an M30 bolt.

[0058] Specifically, in the embodiment of the present utility model, the guide tube section 13 is connected to the lower end of the base tube section 12 by pouring concrete.

[0059] Preferably, in the embodiment of the present utility model, the wall thickness of the guide tube section 13 is 1 cm.

[0060] Specifically, in the embodiment of the present invention, the foundation cylinder section 12 is cast by C30 concrete, and the cylinder wall thickness of the foundation cylinder section 12 is 500 mm.

[0061] Specifically, in the embodiment of the present invention, the basic barrel section 12 is a rectangular barrel section. Figure 1 The length of the horizontal rectangular tube section is 5m. Figure 1 The width of the vertical rectangular tube section is 4m.

[0062] Specifically, in the embodiment of the present utility model, the basic barrel section 12 is Figure 2 The vertical height range is 600mm to 650mm, wherein the basic cylinder section 12 is partially buried below the ground so that the height of the basic cylinder section 12 protruding from the ground ranges from 100mm to 150mm. In this way, rainwater, mud, etc. can be prevented from entering the oil-water separation tank through the liquid inlet and the liquid outlet in sequence.

[0063] Preferably, in the embodiment of the present utility model, the basic barrel section 12 is Figure 2 The vertical height is 600 mm, wherein the height of the basic barrel section 12 protruding from the ground is 100 mm.

[0064] It should be noted that in the embodiment of the present invention, there is an angle between the inner wall of the guide tube section 13 and the horizontal plane, which is greater than or equal to 2° and less than or equal to 4°. Preferably, the angle between the inner wall of the guide tube section 13 and the horizontal plane is 2°.

[0065] like Figure 2As shown, in an embodiment of the utility model, the isolation structure 22 includes: an isolation wall 23, located in the box body 21; a guide plate 24, located at the upper end of the box body 21, the guide plate 24 is inclined relative to the isolation wall 23, and from top to bottom, the distance between the guide plate 24 and the central axis of the through hole decreases, and part of the oil-water mixture in the flow chamber flows into the separation chamber through the guide plate 24; wherein, the isolation wall 23 is arranged in the vertical direction, one end of the isolation wall 23 is connected to the bottom wall of the flow chamber through the guide plate 24, and the other end of the isolation wall 23 is spaced from the bottom wall of the box body 21.

[0066] Through the above-mentioned arrangement, part of the oil-water mixture in the flow chamber can flow into the separation chamber through the guide plate 24. At the same time, part of the cooling water in the separation chamber enters the cache chamber through the gap between the isolation wall 23 and the bottom wall of the box body 21, and is discharged through the drain pipe 41. After a period of static cooling, the oil-water mixture enters the cache chamber through the gap between the isolation wall 23 and the bottom wall of the box body 21, and is discharged through the drain pipe 42.

[0067] It should be noted that, in the embodiment of the utility model, the other end of the isolation wall 23 is spaced apart from the bottom wall of the box body 21, which means that a gap is left between the isolation wall 23 and the bottom wall of the box body 21, so that the oil-water mixture in the separation chamber enters the cache chamber through the gap; or the isolation wall 23 is connected to the bottom wall of the box body 21, and a flow hole is opened at a position of the isolation wall 23 close to the box body 21, so that the oil-water mixture in the separation chamber enters the cache chamber through the flow hole.

[0068] Specifically, in the embodiment of the present invention, the distance between the isolation wall 23 and the bottom wall of the box body 21 ranges from 150 mm to 200 mm. Preferably, the distance between the isolation wall 23 and the bottom wall of the box body 21 is 150 mm.

[0069] Preferably, in the embodiment of the present utility model, the thickness of the isolation wall 23 is 10 mm. Figure 3 In the horizontal direction, the left and right ends of the isolation wall 23 are connected to the inner wall of the box body 21.

[0070] It should be noted that in the embodiment of the present invention, the isolation wall 23, the guide plate 24 and the guide tube section 13 are all made of steel, and the isolation wall 23 and the guide tube section 13 are fixedly connected to the guide plate 24 by full welding.

[0071] Preferably, in the embodiment of the present invention, the guide plate 24 has a thickness of 1 cm.

[0072] It should be noted that in the embodiment of the present invention, there is an angle between the inner wall of the guide plate 24 and the horizontal plane, and the angle is greater than or equal to 2° and less than or equal to 4°. Preferably, the angle between the inner wall of the guide plate 24 and the horizontal plane is 2°.

[0073] like Figure 2 As shown, in the embodiment of the utility model, the bottom wall of the box body 21 has an inclined surface, and under the action of gravity, the waste water and / or oil in the separation chamber flows into the buffer chamber through the inclined surface. In this way, the liquid can pass through the separation chamber and the buffer chamber in sequence under the action of gravity and enter the drain pipe 42.

[0074] Specifically, in the embodiments of the present invention, Figure 2 As shown, the end of the bottom wall of the box body 21 away from the drain pipe 42 is higher than the end of the bottom wall of the box body 21 close to the drain pipe 42. In this way, waste water, oil and oil-water mixture can enter the drain pipe 42 through the separation chamber and the buffer chamber in sequence under the action of gravity.

[0075] It should be noted that in the embodiment of the present invention, there is an angle between the bottom wall of the box body 21 and the horizontal plane, and the angle is greater than or equal to 2° and less than or equal to 4°. Preferably, the angle between the bottom wall of the box body 21 and the horizontal plane is 2°.

[0076] like Figure 2 As shown, in the embodiment of the present invention, a liquid discharge port communicating with the buffer chamber is provided on the side wall of the box body 21, the liquid discharge port is located at the bottom of the buffer chamber, and the liquid discharge pipe 42 communicates with the buffer chamber through the liquid discharge port. In this way, under the action of gravity, all the liquid in the box body 21 can enter the liquid discharge pipe 42 through the liquid discharge port, avoiding liquid residue in the box body.

[0077] It should be noted that in the embodiment of the present invention, a drain port communicating with the cache chamber is provided on the side wall of the box body 21, the drain port is located above the drain port, and the drain pipe 41 is communicated with the cache chamber through the drain port. In this way, waste water in the cache chamber can enter the drain pipe 41 through the drain port.

[0078] Specifically, the distance between the drain outlet and the bottom of the cache chamber ranges from 350 mm to 450 mm. Preferably, the distance between the drain outlet and the bottom of the cache chamber is 400 mm.

[0079] like Figure 2 As shown, in an embodiment of the utility model, the cooling structure 11 includes: a support member 14, which is located in the flow chamber, the support member 14 is connected to the oil pool foundation 10, and a plurality of flow channels are arranged at intervals on the support member 14; at least one layer of pebbles 15 is laid on the support member 14 to cool the oil-water mixture.

[0080] Through the above-mentioned arrangement, the leaked oil can enter the flow chamber and penetrate into the pebbles 15, so as to achieve the effect of rapidly cooling the oil. By setting the supporting structure 14, it is possible to avoid the pebbles 15 being brought into the oil-water separation tank during the process of the oil flowing from the inlet to the outlet, thereby preventing the pebbles 15 from entering the drain pipe 42 and causing blockage of the drain pipe 42.

[0081] It should be noted that, in the embodiment of the utility model, a gap of 150 mm is left between the pebbles 15 and the channel steel foundation of the transformer, so that the oil can enter the flow chamber under the action of gravity, thereby preventing the oil from diffusing in the transformer room.

[0082] It should be noted that in the embodiment of the utility model, the supporting member 14 includes a grille 16 for supporting at least one layer of pebbles 15 and a supporting base 17 for supporting the grille 16. By setting the grille 16, the pebbles 15 can be prevented from entering the box body 21 under the flushing of oil, and by setting the supporting base 17, the rigidity of the grille 16 can be increased to prevent the grille 16 from deformation.

[0083] Specifically, in an embodiment of the utility model, the grille 16 includes a plurality of iron grates, the length of the iron grates is 450 mm, the width is 450 mm, the thickness is 50 mm, the aperture of the iron grates is less than 40 mm, and the plurality of iron grates are connected and fixed by full welding to form the grille 16.

[0084] Specifically, in an embodiment of the utility model, the supporting base 17 is a galvanized solid steel pipe with a diameter of 50 mm, and the galvanized solid steel pipe is welded to the grille 16 by full welding to enhance the bearing capacity of the iron grate; and the galvanized solid steel pipe is connected to the side wall of the box body 21 by prefabricating concrete.

[0085] Specifically, in the embodiment of the present invention, the pebbles 15 are multi-layered, and the thickness of the multi-layered pebbles 15 is greater than or equal to 250 mm.

[0086] Specifically, in the embodiment of the present utility model, along Figure 1 The length of each layer of pebbles 15 in the horizontal direction is 4m. Figure 1 The width of each layer of pebbles 15 in the vertical direction is 3m.

[0087] Specifically, in the embodiment of the present invention, the diameter of the pebbles 15 is 50 mm to 80 mm, so that the pebbles 15 can be prevented from leaking into the box body 21 through the holes on the iron grate.

[0088] It should be noted that in the embodiment of the utility model, the following technical effects can be achieved by setting up an oil-immersed transformer accident oil pool: when a fire occurs in the oil-immersed transformer, an oil-water separation pool is used to collect the high-temperature oil, and the oil is left to stand and cool down, thereby reducing the fire hazard and protecting the transformer device. In addition, by collecting and recycling the oil-water mixture, pollution to the environment can also be avoided.

[0089] The embodiment of the utility model provides an oil-immersed transformer device, comprising the above-mentioned oil-immersed transformer accident oil pool and an oil-immersed transformer arranged on the oil pool foundation 10 .

[0090] The above-mentioned oil-immersed transformer equipment has all the advantages of the above-mentioned oil-immersed transformer accident oil pool, which will not be described in detail here.

[0091] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: by reserving a certain amount of cooling water in the box body and closing the switch component so that the drain pipe is not connected to the collection tank, when an accident occurs in the transformer and causes oil leakage, the oil can enter the flow chamber through the liquid inlet. After being cooled by the cooling structure, the oil enters the separation chamber through the liquid outlet and mixes with the cooling water in the separation chamber to form an oil-water mixture and is divided into an upper layer of oil and a lower layer of waste water. After the oil enters the separation chamber and causes the liquid level to rise, due to the principle of the communicating vessel, the lower layer of waste water in the separation chamber will pass through the isolation structure and the bottom wall of the box body. The oil and water mixture will enter the cache chamber through the gap between them, thereby raising the liquid level in the cache chamber, and then some of the lower wastewater in the cache chamber will flow into the collection chamber through the drain pipe. When the wastewater level in the cache chamber is lower than the drain pipe, the lower wastewater will no longer flow to the collection chamber. At this time, the staff can pump out the wastewater in the collection pool, and after the oil-water mixture has been allowed to stand and cool down in the box for a period of time, the switch component is turned on to allow the oil-water mixture in the box to flow into the collection chamber through the drain pipe. After the oil-water mixture has completely flowed into the collection chamber and has been allowed to stand and separate, the staff will use a submersible sewage pump to suck and recover the oil and wastewater in turn. Through the above-mentioned arrangement, on the one hand, the oil can enter the box and contact with the cooling water, thereby reducing the oil temperature. Among them, the waste water is first discharged into the collection chamber through the drain pipe, which can prevent the high-temperature oil from directly entering the pipeline and causing damage to the pipeline. Then, the oil-water mixture is allowed to stand in an additional box, which can further reduce the oil temperature to avoid damage to the drain pipe when the high-temperature oil is discharged, and can also avoid fires caused by high-temperature oil. On the other hand, by setting up a collection pool to collect the oil, the oil can be recovered after standing and cooling in the collection pool, which can not only avoid the pollution of soil and water bodies caused by direct discharge of oil into the field, but also avoid fire accidents caused by oil discharge.

[0092] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An oil-immersed transformer accident oil pool, characterized in that: include: An oil pool foundation (10) defines a flow chamber and a liquid inlet and a liquid outlet communicated with the flow chamber, wherein a cooling structure (11) for cooling the oil-water mixture is provided in the flow chamber; An oil-water separation tank, comprising a box (21) located below the oil tank foundation (10) and an isolation structure (22) arranged in the box (21), one end of the isolation structure (22) being connected to the bottom wall of the flow chamber, and the other end of the isolation structure (22) being spaced apart from the bottom wall of the box (21) so as to separate the interior of the box (21) into a separation chamber and a buffer chamber that are connected to each other, and the separation chamber is connected to the liquid outlet; A collection tank (30) having a collection chamber; The communication structure comprises a drain pipe (41) and a drain pipe (42) arranged at intervals in the vertical direction, wherein the drain pipe (41) is located above the drain pipe (42), one end of each of the drain pipe (41) and the drain pipe (42) is connected to the buffer chamber, and the other ends of each of the drain pipe (41) and the drain pipe (42) are connected to the collection chamber, and a switch component (43) for controlling the on and off of the drain pipe (42) is provided on the drain pipe (42), so that the lower layer of wastewater formed after the oil-water mixture is statically layered in the separation chamber can flow into the collection chamber through the buffer chamber and the drain pipe (41) in sequence.

2. The oil-immersed transformer accident oil pool according to claim 1, characterized in that: The liquid discharge pipe (42) is arranged obliquely between the box body (21) and the collecting tank (30), the liquid inlet end of the liquid discharge pipe (42) is higher than the liquid outlet end of the liquid discharge pipe (42), and the switch component (43) is arranged at the liquid outlet end; and / or, The drainage pipe (41) is arranged obliquely between the box body (21) and the collection tank (30), and the water inlet end of the drainage pipe (41) is higher than the water outlet end of the drainage pipe (41).

3. The oil-immersed transformer accident oil pool according to claim 2, characterized in that: At least one of the liquid drain pipe (42) and the water drain pipe (41) has an angle A with the horizontal plane, and the angle A is greater than or equal to 2° and less than or equal to 5°.

4. The oil-immersed transformer accident oil pool according to claim 1, characterized in that: The outer periphery of the liquid discharge pipe (42) and / or the water discharge pipe (41) is sheathed with a rigid waterproof sleeve.

5. The oil-immersed transformer emergency oil pool according to any one of claims 1 to 4, characterized in that: The oil pool foundation (10) is a cylindrical structure with a through hole, and the cylindrical structure comprises: A basic cylinder section (12) is made of concrete material, and the upper end of the basic cylinder section (12) forms the liquid inlet; The flow guide cylinder section (13) is connected to the lower end of the basic cylinder section (12), and the cross-sectional area of ​​the flow guide cylinder section (13) gradually decreases from top to bottom. The inner wall of the flow guide cylinder section (13) forms the bottom wall of the flow chamber, and the end of the flow guide cylinder section (13) away from the basic cylinder section (12) forms the liquid outlet.

6. The oil-immersed transformer accident oil pool according to claim 5, characterized in that: The isolation structure (22) comprises: A separation wall (23) is located inside the box (21); a guide plate (24) located at the upper end of the box body (21), the guide plate (24) being arranged obliquely relative to the isolation wall (23), and the distance between the guide plate (24) and the central axis of the through hole decreasing from top to bottom, so that part of the oil-water mixture in the flow chamber flows into the separation chamber through the guide plate (24); The isolation wall (23) is arranged in a vertical direction, one end of the isolation wall (23) is connected to the bottom wall of the flow chamber through the guide plate (24), and the other end of the isolation wall (23) is spaced apart from the bottom wall of the box (21).

7. The oil-immersed transformer emergency oil pool according to any one of claims 1 to 4, characterized in that: The bottom wall of the box body (21) has an inclined surface, and under the action of gravity, the wastewater and / or oil in the separation chamber flows into the buffer chamber through the inclined surface.

8. The oil-immersed transformer emergency oil pool according to any one of claims 1 to 4, characterized in that: A liquid discharge port communicating with the cache chamber is provided on the side wall of the box body (21); the liquid discharge port is located at the bottom of the cache chamber; and the liquid discharge pipe (42) is communicated with the cache chamber via the liquid discharge port.

9. The oil-immersed transformer emergency oil pool according to any one of claims 1 to 4, characterized in that: The cooling structure (11) comprises: A support member (14) is located in the flow chamber, the support member (14) is connected to the oil pool foundation (10), and a plurality of flow channels are arranged at intervals on the support member (14); At least one layer of pebbles (15) is laid on the support member (14) to cool the oil-water mixture.

10. An oil-immersed transformer device, characterized in that: It comprises an oil-immersed transformer emergency oil pool as claimed in any one of claims 1 to 9 and an oil-immersed transformer arranged on the oil pool foundation (10).

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