Novel transformer accident oil pool
By designing a new transformer accident oil tank, using overflow pipes and water pumps to achieve oil-water separation and sewage improvement, the problem of sewage cannot be eliminated, and the effect of oil-water separation and sewage improvement is achieved.
Patent Information
- Application Number
- CN202422457641.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-11
AI Technical Summary
Due to the arrangement of the existing transformer accident oil tank, the separated sewage cannot be discharged into the nearby sewage system by gravity. A water pump needs to be installed for removal, and the oil-water separation effect is not good.
A new type of transformer accident oil pool is designed, including the main body of the accident oil pool and the drainage pool. The overflow pipe is used to achieve oil-water separation, and the sewage is lifted to a nearby or further drainage system through a water pump, solving the problem that sewage cannot be removed from gravity flow.
The oil-water separation effect is achieved, and the waste oil remains in the oil pool. The sewage is squeezed into the drainage pool through the overflow pipe. After it accumulates to a certain liquid level, it is lifted from the water pump to the drainage system, solving the problem that the sewage cannot be removed from gravity flow.
Smart Images
Figure CN223248813U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chemical safety, in particular to a novel transformer accident oil pool. Background Art
[0002] When the oil volume of a single outdoor electrical device exceeds 1,000 kg, an emergency oil pool with oil-water separation measures should be installed. Transformers in existing substations at large and medium-sized petrochemical enterprises can contain tens or even hundreds of tons of oil. However, when a main transformer malfunctions or undergoes maintenance, the emergency oil is discharged through pipes into the emergency oil pool. In the event of a main transformer fire, the water spray fire extinguishing system activates, and the water mist and wastewater form oily wastewater. This oily wastewater is then discharged through pipes into the emergency oil pool for oil-water separation and treatment to prevent oil or wastewater leaks and environmental pollution.
[0003] Due to layout reasons, the accident oil sump is sometimes far from the main transformer, and the oil drainage pipeline requires a relatively steep slope. This results in the oil inlet and drain pipes of the accident oil sump being at a lower elevation, while the nearby drain pipes or ditches are at a higher elevation, or sometimes there is no sewage system nearby. In this case, the separated sewage cannot be discharged into the nearby sewage system by gravity flow, and a water pump is required to remove it. Utility Model Content
[0004] The purpose of the utility model is to provide a new type of transformer accident oil pool capable of oil-water separation, so as to solve the problems of existing transformer waste liquid collection, storage, oil-water separation, etc., and to solve the problem that accident sewage cannot be discharged by gravity flow by setting a water pump.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a novel transformer accident oil pool, comprising an accident oil pool body and a cover plate, wherein the cover plate is placed on the top of the accident oil pool body, wherein the accident oil pool body is provided with two chambers of different sizes, wherein the large chamber is an oil pool and the small chamber is a drainage pool; holes are provided on both sides of the inner wall of the oil pool, an overflow pipe is installed in the hole on the side adjacent to the oil pool and the drainage pool, the overflow pipe is fixed by an overflow pipe fixing bracket installed on the inner wall of the oil pool, an overflow pipe water suction bell is provided at the bottom of the overflow pipe, an oil inlet pipe is installed in the hole on the other side of the oil pool, and the bottom elevation of the oil inlet pipe is higher than the bottom elevation of the overflow pipe; a hole is provided on one side of the cover plate located at the drainage pool, a drainage pipe is installed in the hole, the drainage pipe is fixed in the drainage pool by a drainage pipe fixing bracket installed on the inner wall of the drainage pool, and the drainage pipe is connected to the drainage main pipe via a water pump (5).
[0006] As a preferred embodiment of the present invention, the drainage facility includes a water suction pipe, which is connected to a water pump, a check valve, and a butterfly valve in sequence, and a water suction bell mouth is provided at the end of the water suction pipe.
[0007] As a preferred embodiment of the present invention, the inner wall of the oil pool is further provided with a hole for installing a ventilation pipe, the ventilation pipe is located above the oil inlet pipe, a waterproof sleeve is provided on the outside of the ventilation pipe, and a stainless steel fire-blocking net is installed at the end of the ventilation pipe.
[0008] As a preferred embodiment of the present invention, a maintenance manhole is provided on the top cover plate of the oil pool and / or drainage pool; and a waterproof casing is provided on the outside of the overflow pipe and / or the oil inlet pipe.
[0009] As a preferred embodiment of the present invention, the number of the drainage devices is 1 or more.
[0010] As a preferred embodiment of the present invention, a waterproof casing is provided on the outside of the water suction pipe, and the water pump is a self-priming drainage pump.
[0011] As a preferred embodiment of the present invention, an overflow pipe support bracket is installed at the bottom of one side of the oil pool adjacent to the drainage pool, the overflow pipe water suction bell is placed above the overflow pipe support bracket, and the overflow pipe fixing bracket is located in the middle of the overflow pipe.
[0012] As a preferred embodiment of the present invention, a water suction equipment support bracket is installed at the bottom of the drainage tank, and the water suction bell mouth of the water suction pipe is placed above the water suction equipment support bracket.
[0013] As a preferred embodiment of the present invention, the water suction equipment support bracket and / or the overflow pipe support bracket is a cylinder with an opening at the top and a meshed side surface.
[0014] As a preferred embodiment of the present invention, the diameter of the oil inlet pipe is determined according to the model of the transformer and / or the time required to drain the emergency oil.
[0015] As a preferred embodiment of the present invention, the effective volume of the oil pool is determined according to the model of the transformer, and the effective liquid level of the emergency oil is equal to or lower than the bottom elevation of the overflow pipe.
[0016] The utility model has the following beneficial effects:
[0017] Compared to existing technologies, the novel transformer emergency oil sump provided by this utility model utilizes the principle that water is denser than oil to achieve oil-water separation. The separated wastewater in the sump is squeezed into a drainage sump through an overflow pipe, while the waste oil remains in the sump for post-accident disposal or reuse. When the wastewater in the drainage sump reaches a certain level, a level gauge interlock activates a water pump to pump the wastewater to a nearby or more distant drainage system, resolving the practical issue of low drainage levels preventing gravity drainage to nearby drain pipes or channels. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1This is a plan view of the utility model transformer accident oil pool;
[0019] Figure 2 This is the AA cross-sectional view of the utility model;
[0020] Figure 3 This is an installation diagram of the utility model waterproof casing.
[0021] In the figure: 1-oil tank; 2-drainage tank; 3-overflow pipe; 4-suction pipe; 5-water pump; 6-check valve; 7-butterfly valve; 8-drainage main pipe; 9-ventilation pipe; 10-oil inlet pipe; 11-manhole; 12-stainless steel fireproof net; 13-drainage pipe fixing bracket; 14-overflow pipe fixing bracket; 15-suction pipe water bell mouth; 16-overflow pipe water bell mouth; 17-suction pipe support bracket; 18-overflow pipe support bracket; 19-waterproof casing; L1-oil inlet pipe bottom elevation; L2-overflow pipe bottom elevation; L3-bell mouth bottom elevation. DETAILED DESCRIPTION
[0022] The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments. The terms "upper," "lower," "left," "right," "front," "back," and "top" in the following embodiments are intended only for the purpose of understanding and explaining the present invention and are not intended to limit the present invention.
[0023] Reference Figures 1 to 3 The utility model provides a new type of transformer accident oil pool, which includes an accident oil pool body and a cover plate. The cover plate is placed on the top of the accident oil pool body. The accident oil pool body is provided with two chambers of different sizes, wherein the large chamber is the oil pool 1 and the small chamber is the drainage pool 2. Holes are provided on both sides of the inner wall of the oil pool 1. An overflow pipe 3 is installed in the hole on the side adjacent to the oil pool 1 and the drainage pool 2. The overflow pipe 3 is fixed by an overflow pipe fixing bracket 14 installed on the inner wall of the oil pool 1. An overflow pipe water suction bell mouth 16 is provided at the bottom of the overflow pipe 3. The holes on the other side of the oil pool 1 An oil inlet pipe 10 is installed in the middle, and the bottom elevation L1 of the oil inlet pipe is higher than the bottom elevation L2 of the overflow pipe; a hole is provided on one side of the cover plate located in the drainage pool 2, and a drainage pipe is installed in the hole. The drainage pipe is fixed in the drainage pool 2 through a drainage equipment fixing bracket 13 installed on the inner wall of the drainage pool 2, and both drainage pipes are connected to the drainage main pipe 8 after passing through a water pump; the drainage facility includes a suction pipe 4, which is connected to a water pump 5, a check valve 6, and a butterfly valve 7 in sequence. A suction pipe water suction bell mouth 15 is provided at the end of the suction pipe 4, and the water pump 5 is a self-priming drainage pump.
[0024] The inner wall of the oil pool 1 is also provided with a hole for installing a ventilation pipe 9 . The ventilation pipe 9 is located above the oil inlet pipe 10 . A stainless steel fire-blocking net 12 is installed at the end of the ventilation pipe 9 .
[0025] A maintenance manhole 11 is provided on the top cover plate of the oil pool 1 and the drainage pool 2; and waterproof sleeves are provided on the outside of the overflow pipe 3, the water suction pipe 4, the ventilation pipe 9 and the oil inlet pipe 10.
[0026] An overflow pipe support bracket 18 is installed at the bottom of the oil pool 1 adjacent to the drainage pool 2. The overflow pipe water suction bell mouth 16 is placed above the overflow pipe support bracket 18, and the overflow pipe fixing bracket 14 is located in the middle of the overflow pipe 3.
[0027] A water suction equipment support bracket 17 is installed at the bottom of the drainage tank, and the water suction bell mouth 15 of the water suction pipe is placed above the water suction equipment support bracket 17.
[0028] The water suction equipment support bracket 17 and the overflow pipe support bracket 18 are cylindrical bodies with an opening at the top and meshed sides.
[0029] The diameter of the oil inlet pipe 10 is determined according to the model of the transformer and the time required to drain the emergency oil.
[0030] The oil pool 1 is connected to the oil inlet pipe 10, the overflow pipe 3 and the ventilation pipe 9, and is the main place for achieving oil-water separation; the drainage pool is connected to the overflow pipe and the drainage equipment, and plays the role of collecting and discharging sewage.
[0031] The oil inlet pipe 10 enters the accident oil pool through the pre-buried sleeve on the wall of the accident oil pool. The diameter of the oil inlet pipe 10 is selected based on the requirement to drain the accident oil in 20 minutes. If the transformer has a water distribution spray system, the diameter of the oil inlet pipe 10 should take into account the amount of water sprayed. The ventilation pipe 9 connects the accident oil pool body and the atmosphere to discharge combustible gases. The end flange of the ventilation pipe 9 is equipped with a stainless steel fire-blocking net 12 to prevent the flame from entering the accident oil pool along the ventilation pipe. The overflow pipe 3 is connected to the drainage pool 2 from the bottom of the oil pool 1 with a 90-degree elbow. The suction pipe 4 connects the drainage pool 2 and the water pump 5. The diameter of the suction pipe 4 is consistent with the inlet diameter of the water pump 5. The overflow pipe fixing bracket 14 is located in the middle of the overflow pipe 3 to fix the overflow pipe.
[0032] The bottom elevation L1 of the oil inlet pipe of the accident oil pool needs to be determined according to the bottom elevation of the oil collection pit at the bottom of the transformer, the length and slope of the oil inlet pipe 10. The bottom elevation L2 of the overflow pipe where the overflow pipe 3 passes through the pool wall is lower than the bottom elevation L1 of the oil inlet pipe. The heights of the bottoms of the overflow pipe water suction bell 18 and the suction pipe water suction bell 17 are both at the bell bottom elevation L3. For specific values, please refer to the standard drawing collection 02S404 steel pipe fittings.
[0033] Compared to conventional emergency oil sumps, this new model adds an overflow pipe 3, a drain tank 2, and drainage equipment. Under normal operating conditions, no liquid flows through the emergency oil sump's oil inlet pipe 10, overflow pipe 3, water pump inlet pipe 4, and water pump outlet pipe 8. The emergency oil sump maintains a constant level of water, with the highest point of the water level coinciding with the bottom elevation of the overflow pipe, L2. During routine maintenance, ensure regular water replenishment to maintain a constant water level.
[0034] In some more specific embodiments:
[0035] The effective volume of the accident oil pool is 22.5 m 3 The plane size is 4x5m. Taking the ground as the reference, the oil inlet pipe bottom elevation L1 is -2.0 m, the overflow pipe bottom elevation L2 is -2.124 m, and the bell mouth bottom elevation L3 is -3.125 m.
[0036] When it rains at the transformer, the rainwater at the transformer enters the oil pool 1 through the oil inlet pipe 10. As the amount of rainwater increases, the rainwater level reaches the overflow pipe bottom elevation L2 and overflows into the drainage pool 2. When the rainwater reaches the high level in the rainwater pool 2, the water pump 5 is started, which pumps the collected rainwater into the attached rainwater drainage system. The water pump start level is no higher than the overflow pipe bottom elevation L2.
[0037] When a transformer accident occurs, the transformer's accident oil (if a water spray fire extinguishing device is used in the transformer area, the pipe will contain a certain amount of water) will be discharged from the oil inlet pipe 10 into the oil pool 1. Since oil is lighter than water, the accident oil will be in the upper layer after being discharged into the oil pool 1. At this time, under the action of gravity, the water pre-stored in the pool enters the overflow pipe water suction bell mouth and is discharged from the oil pool 1 through the overflow pipe 3. The discharged water is collected in the drainage pool 2, achieving the purpose of oil-water separation. After all the accident oil (water) is discharged into the oil pool 1, there is no liquid flow in the oil inlet pipe 10, overflow pipe 3, suction pipe 4 and drainage main 8, and the liquid level in the accident oil pool no longer changes. The oil pool 1 is a concrete pool, and its effective volume must be guaranteed to be able to store all the accident oil. The drainage pool 2 is also a concrete pool, and its effective volume must be guaranteed to be able to store all the fire water in the accident state. L2 is the effective liquid level of the accident oil, L1-L2=(ρ 水 -ρ 油 ) × (L2-L3). In addition, after the accident oil pool receives the oil collected in an accident, the sewage in the oil pool 1 and the drainage pool 2 in the accident oil pool body should be cleared out in a short period of time to ensure that there is sufficient volume for the next equipment accident oil discharge.
Claims
1. A new type of transformer accident oil pool, characterized by: The invention comprises an accident oil pool body and a cover plate, wherein the cover plate is placed on the top of the accident oil pool body, wherein the accident oil pool body is provided with two chambers of different sizes, wherein the large chamber is an oil pool (1) and the small chamber is a drainage pool (2); holes are provided on both sides of the inner wall of the oil pool (1), an overflow pipe (3) is installed in the hole on the side adjacent to the oil pool (1) and the drainage pool (2), and the overflow pipe (3) is fixed by an overflow pipe fixing bracket (14) installed on the inner wall of the oil pool (1). ) is provided with an overflow pipe water suction bell mouth (16) at the bottom, an oil inlet pipe (10) is installed in the hole on the other side of the oil pool (1), and the bottom elevation (L1) of the oil inlet pipe is higher than the bottom elevation (L2) of the overflow pipe; a hole is provided on one side of the cover plate located on the drainage pool (2), a drainage pipe is installed in the hole, the drainage pipe is fixed in the drainage pool (2) through a drainage pipe fixing bracket (13) installed on the inner wall of the drainage pool (2), and the drainage pipe is connected to the drainage main pipe (8) through a water pump (5).
2. The novel transformer emergency oil pool according to claim 1 is characterized in that: The drainage pipeline comprises a water suction pipe (4), which is sequentially connected to a water pump (5), a check valve (6), and a butterfly valve (7). A water suction bell mouth (15) is provided at the end of the water suction pipe (4).
3. The novel transformer emergency oil pool according to claim 1 is characterized in that: The inner wall of the oil pool (1) is also provided with a hole for installing a ventilation pipe (9). The ventilation pipe (9) is located above the oil inlet pipe (10). A waterproof sleeve is provided on the outside of the ventilation pipe (9). A stainless steel fire-blocking net (12) is installed at the end of the ventilation pipe (9).
4. The novel transformer emergency oil pool according to claim 1 is characterized in that: A maintenance manhole (11) is provided on the top cover plate of the oil pool (1) and / or the drainage pool (2); and a waterproof sleeve is provided on the outside of the overflow pipe (3) and / or the oil inlet pipe (10).
5. The novel transformer emergency oil pool according to claim 2 is characterized in that: The number of the drainage pipes is 1 or more.
6. The novel transformer emergency oil pool according to claim 5 is characterized in that: A waterproof casing is provided on the outside of the water suction pipe (4), and the water pump (5) is a self-priming drainage pump.
7. The novel transformer emergency oil pool according to claim 1 is characterized by: An overflow pipe support bracket (18) is installed at the bottom of one side of the oil pool (1) adjacent to the drainage pool (2), the overflow pipe water suction bell mouth (16) is placed above the overflow pipe support bracket (18), and the overflow pipe fixing bracket (14) is located in the middle of the overflow pipe (3).
8. The novel transformer emergency oil pool according to claim 2 is characterized by: A water suction equipment support bracket (17) is installed at the bottom of the drainage tank, and the water suction bell mouth (15) of the water suction pipe is placed above the water suction equipment support bracket (17).
9. The novel transformer emergency oil pool according to any one of claims 1 to 8, characterized in that: The diameter of the oil inlet pipe (10) is determined according to the model of the transformer and / or the time required to drain the emergency oil.
10. The novel transformer emergency oil pool according to any one of claims 1 to 8, characterized in that: The effective volume of the oil pool (1) is determined according to the model of the transformer, and the effective liquid level of the emergency oil is equal to or lower than the bottom elevation (L2) of the overflow pipe.