CN212651391U

CN212651391U - Integrated form is from arranging accident oil bath

Info

Publication number: CN212651391U
Application number: CN202020841858.1U
Authority: CN
Inventors: 谌伟宁; 刘晓亮; 杨佳刚
Original assignee: Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Current assignee: Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-03-05
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to an accident oil pool technical field specifically indicates an integrated form is from arranging accident oil pool. Comprises a transformer base; an oil accumulation pit for storing waste oil is formed in the low-lying position of the transformer base; a hollow cavity is arranged below the oil accumulation pit; an oil storage chamber and a clear water chamber are arranged in the hollow chamber; the oil storage cavity is positioned right below the oil accumulation pit and is communicated with the oil accumulation pit; the bottom of the clear water cavity is communicated with the bottom of the oil storage cavity, and an overflow structure for discharging upper standing clarified water is arranged in the clear water cavity. The utility model discloses make full use of transformer basis below plane space, promoted the automatic outer effect of arranging of profit autosegregation and clear water on the one hand, on the other hand has shortened the time of converging from long-pending oil pit to accident oil pool by a wide margin, in addition, because accident oil pool capacity is enough big, is in the underground again, and the clear water is difficult to the evaporation loss, also provides convenient water source for the fire-fighting water pump, and simple structure is compact, has very big spreading value.

Description

Integrated form is from arranging accident oil bath

Technical Field

The utility model relates to an accident oil pool technical field specifically indicates an integrated form is from arranging accident oil pool.

Background

The transformer accident oil pool is used as a main structure for discharging oil after transformer failure or fire disaster occurs, and has a non-negligible effect on effectively avoiding loss expansion. At present, oil-immersed transformers of transformer substations in construction or operation are all provided with oil storage pits with oil storage or oil blocking functions, and are also provided with common total accident oil storage pools. The volume of the total accident oil storage tank is determined according to the total oil quantity of the largest oil filling tank. For a fixed water spray fire extinguishing system, the volume of the total accident oil storage pool is determined according to the sum of the oil quantity of the largest oil storage tank and the fire extinguishing water quantity.

The fire control of transformer adopts water spray fire extinguishing systems usually, can spray a large amount of water after fire extinguishing systems starts, and oil-water mixture falls into main change oil pit this moment, through bottom cobblestone and iron grid space, collects to the accident oil bath in the oil drain pipe. In case of non-accident, rainwater and waste oil are collected to the accident oil pool through the same path.

The oil storage pit is a rectangular pit groove with a concave middle part, the plane size of the oil storage pit is determined according to the horizontal projection of the outer contour of the equipment, and each side of the horizontal projection of the outer contour of the equipment is required to be expanded by 1 m; meanwhile, the middle parts of the equipment except the foundation and the edges are sunken downwards to form an oil accumulation pit, and the oil is blocked by the edges around so as not to overflow. The oil accumulation pits are internally paved with pebble layers, the thickness of each pebble layer is not less than 250mm, and the diameter of each pebble is generally 50 mm-80 mm. The edge exceeds the top surface of the pebble by no less than 50 mm. The total depth of the depression is not less than 300mm, and an outlet which leads to the total accident oil storage tank is arranged at the lowest part of the depression. The outlet is provided with an iron grate to prevent pebbles from falling. When an accident and oil leakage occur in a certain transformer, the spraying system starts to extinguish fire and reduce temperature, and the oil-water mixed liquid is collected to the total accident oil storage tank through a pipeline. The general requirement is that the oil-water separation device is arranged in the total accident oil storage tank, so that clean water can be automatically discharged, waste oil is left, and the environment pollution caused by the waste oil is prevented. After the accident, the waste oil is pumped away for additional treatment.

For conservation and safety reasons, a large amount of waste oil in the transformer during accidents leaks out in a short time, falls into an oil collecting pit at the lower part, is mixed with spray fire-fighting water, and is collected into a total accident oil storage tank through a buried pipeline. This time is generally required to be as short as possible, which requires that the length of the buried pipeline be as short as possible, the section be as large as possible, the longitudinal slope of the water discharge along the pipeline be as steep as possible, and the discharge of clean water be as fast as possible.

Usually, the oil storage pits and the total accident oil storage pool are separately arranged, and the oil storage pits are communicated through buried pipelines. Because more electrical equipment and cable ducts are arranged in the transformer substation, the general accident oil storage pool is generally arranged at a position of a relatively spacious base of the equipment, and the distance between the oil storage pit and the general accident oil storage pool is relatively long, so that the converging time from the oil accumulation pit to the general accident oil storage pool is generally several minutes, the fire fighting is not facilitated, and the floor area and the plane arrangement difficulty of the transformer substation are increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem mentioned in the background art and providing an integrated form is from arranging accident oil bath.

The technical scheme of the utility model is that: the utility model provides an integrated form is from arranging accident oil bath which characterized in that: comprises a transformer base; an oil accumulation pit for storing waste oil is formed in the low-lying position of the transformer base; a hollow cavity is arranged below the oil accumulation pit; an oil storage chamber and a clear water chamber are arranged in the hollow chamber; the oil storage cavity is positioned right below the oil accumulation pit and is communicated with the oil accumulation pit; the bottom of the clear water cavity is communicated with the bottom of the oil storage cavity, and an overflow structure for discharging upper standing clarified water is arranged in the clear water cavity.

Further said overflow structure comprises a weir; the overflow weir is a stainless steel thin-wall weir which is arranged in the clear water chamber along the vertical direction, and a water outlet confluence groove communicated with a clear water outlet on the side wall of the clear water chamber is arranged between the overflow weir and the clear water chamber; the top elevation of the clear water outlet is lower than that of the overflow weir.

And the bottom of the water outlet confluence groove is an inclined slope surface structure which is low near one end of the clear water outlet and high far away from one end of the clear water outlet.

The oil-water mixed liquid circulation device further comprises a backflow chamber used for increasing the flow stroke of the oil-water mixed liquid; the oil storage chamber and the clear water chamber are respectively arranged at two sides of the backflow chamber.

A plurality of groups of grid inner walls are further arranged in the backflow cavity; one end of each grid inner wall is connected to a vertical solid wall body with a flow passing gap reserved between the side wall of one side of the backflow cavity and the side wall of the other side of the backflow cavity, the flow passing gaps of the adjacent grid inner walls are arranged in a staggered mode, and a baffling type structure is formed in the backflow cavity.

A through hole penetrating through the transformer foundation is further formed in the lowest position of the oil accumulation pit; an oil-water mixed liquid falling platform is arranged in the oil storage chamber and is positioned right below the through hole; the oil-water mixed liquid dropping platform is a horizontal wall body which is fixed on the side wall of the oil storage chamber and suspended in the oil storage chamber.

The utility model has the advantages that: 1. the accident pool is directly arranged under the transformer foundation, waste oil stored in the oil accumulation pit or oil-water mixed liquid after fire fighting can directly enter the accident pool from the oil accumulation pit, so that the automatic oil-water separation and clean water discharge effects are improved, the confluence time from the oil accumulation pit to the accident pool is greatly shortened, and the structure is simple and compact;

2. the overflow weir of the utility model has larger overflow width, improves the overflow flow, and can rapidly discharge the upper clear water in the clear water chamber;

3. the utility model is provided with the water outlet confluence groove at the other side of the overflow weir, and the bottom surface of the water outlet confluence groove is of an inclined slope structure, thereby facilitating the rapid flow of liquid and avoiding accumulating in the water outlet confluence groove;

4. the utility model is provided with the backflow cavity in the oil storage cavity and the clear water cavity, the flowing time of the oil-water mixed liquid is prolonged through the backflow cavity, the layering effect of the oil-water mixed liquid is increased, and the oil-water separation effect is improved;

the backflow cavity of the utility model is arranged in a staggered way through the inner walls of the grids to form a baffling structure, and the structure is simple;

5. the utility model discloses set up the through-hole intercommunication long-pending oil pit and the oil storage cavity that link up in the lower of long-pending oil pit to set up the mixed liquid of oil and water in the oil storage cavity and fall the platform, the mixed liquid of oil and water falls the impact strength that the platform can reduce the mixed liquid of oil and water of falling the oil storage cavity, reduces and mixes the effect, reduces follow-up oil-water separation's the degree of difficulty.

The utility model discloses simple structure, construction convenience carries out effective integration with transformer foundation, long-pending oil hole and accident oil pool, make full use of transformer foundation below space, has cancelled long-pending oil hole to the buried pipeline in accident oil pool, has promoted profit autosegregation and the automatic outer effect of arranging of clear water on the one hand, and on the other hand has shortened the time of converging from long-pending oil hole to accident oil pool by a wide margin, and simple structure is compact, and economy is reliable, has very big spreading value.

Drawings

FIG. 1: the utility model discloses an accident oil pool axial view;

FIG. 2: the cross section view (overlooking direction) of the accident oil pool of the utility model;

FIG. 3: the utility model discloses an accident oil pool cross-sectional view (side view direction);

wherein: 1-transformer foundation; 2-oil accumulation pit; 3-oil storage chamber; 4-clear water chamber; 5, an overflow weir; 6-clear water outlet; 7-water outlet confluence tank; 8-a reflow chamber; 9-inner wall of grid; 10-a through hole; 11, dropping the oil-water mixed liquid on a platform; 12-oil suction pump platform.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1 to 3, an integrated self-discharging emergency oil pool, in the embodiment, an emergency oil pool main body is located under a transformer foundation 1, and a space under the transformer foundation 1 is fully utilized. As shown in fig. 1 and 3, the transformer base 1 has a reinforced concrete slab structure, and the oil sump 2 of the present embodiment is formed in a low-lying portion of the transformer base 1, that is, waste oil generated during the operation of the transformer or oil-water mixture for fire protection is stored in the oil sump 2.

This embodiment sets up through-hole 10 in the lowest of long-pending oil pit 2, is oil storage cavity 3 under long-pending oil pit 2, and oil storage cavity 3 is closed cavity, through-hole 10 and long-pending oil pit 2 intercommunication, and waste oil or the oil-water mixture in long-pending oil pit 2 falls into oil storage cavity 3 through-hole 10.

An oil-water mixed liquid falling platform 11 is arranged in the oil storage cavity 3 and is located under the through hole 10, the oil-water mixed liquid falling platform 11 is a horizontal wall fixed on the side wall of the oil storage cavity 3 and suspended in the oil storage cavity 3, and after the oil-water mixed liquid falls into the through hole 10, the oil-water mixed liquid falling platform 11 is dropped by the oil-water mixed liquid, so that impact mixing of the oil-water mixed liquid is reduced, and subsequent oil-water separation is facilitated.

In order to improve the oil-water separation effect of the oil-water mixed liquid, a backflow cavity 8 is arranged in the hollow cavity right below the transformer base 1, and the backflow cavity 8 is used for increasing the flow stroke of the oil-water mixed liquid. As shown in fig. 1-2, be provided with multiunit grid interior wall 9 in the backward flow cavity 8, grid interior wall 9 one end is connected in the vertical solid wall body that flows the clearance of leaving between 8 one side lateral wall of backward flow cavity, the other end and the opposite side lateral wall, and the clearance staggered arrangement that overflows of adjacent grid interior wall 9 forms baffling formula structure in backward flow cavity 8, and the oil-water mixture flows in backward flow cavity 8 is turned back, has prolonged the flow time, has slowed down the velocity of flow, has accelerateed oil-water separation.

As shown in fig. 1 to 3, in the present embodiment, a clean water chamber 4 is disposed at one end of the backflow chamber 8, which is opposite to the oil storage chamber 3, the bottom of the clean water chamber 4 is communicated with the backflow chamber 8 through a through hole in a wall, and the clean water chamber 4 is used for discharging separated clean water. An overflow weir 5 is arranged in the clear water chamber 4, and the overflow weir 5 is used for discharging upper-layer standing clarified water. As shown in fig. 1 to 3, a vertical end wall is arranged in the clean water chamber 4, a stainless steel thin-wall overflow weir 5 is arranged at the upper end of the end wall, and the overflow weir 5 is of a thin-wall structure, so that the attachment of liquid is reduced, and the overflow efficiency is improved.

Form the play water of clear water outflow between overflow one side of overflow weir 5 and the lateral wall of clear water cavity 4 and converge groove 7, as shown in fig. 1 ~ 2, it converges groove 7 upper end opening to go out water, the bottom is for closing on that clear water export 6 one end is low, keep away from the high slope surface structure of clear water export 6 one end, the rivers that overflow entered into play water on overflow weir 5 converge groove 7 flow downwards on slope surface, clear water export 6 outflow on the lateral wall through clear water cavity 4, clear water export 6 top elevation is less than overflow weir 5, so that rivers discharge fast.

In this embodiment, an oil suction pump platform 12 is disposed in the backflow chamber 8, and the oil suction pump platform 12 is used for placing an oil suction pump, and oil liquid obtained by final separation is discharged through the oil suction pump.

During actual operation, waste oil or oil-water mixed liquid on the transformer foundation 1 flows into the oil collecting pit 2, the oil-water mixed liquid falls into the oil storage cavity 3 through the through hole 10, the oil-water mixed liquid falls into the bottom of the oil storage cavity 3 through the blockage of the platform 11, then the oil-water mixed liquid enters the backflow cavity 8 through the overflow gap at the end part of the grid inner wall 9, the oil-water mixed liquid turns back and flows in the backflow cavity 8 until entering the clear water cavity 4, when liquid in the clear water cavity 4 slowly rises to the top of the overflow weir 5, the liquid overflows through the overflow weir 5 and enters the water outlet backflow groove 7, then the liquid is discharged from the clear water outlet 6, and the waste oil in the backflow cavity 8 is discharged through the oil suction pump on the oil suction pump platform 12.

In this embodiment, the oil storage chamber 3 and the clear water chamber 4 are both provided with elbow pipes communicated with the atmosphere

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an integrated form is from arranging accident oil bath which characterized in that: comprising a transformer base (1); an oil accumulation pit (2) for storing waste oil is formed in a low-lying position of the transformer base (1); a hollow cavity is arranged below the oil accumulation pit (2); an oil storage chamber (3) and a clear water chamber (4) are arranged in the hollow chamber; the oil storage chamber (3) is positioned under the oil accumulation pit (2) and is communicated with the oil accumulation pit (2); the bottom of the clear water chamber (4) is communicated with the bottom of the oil storage chamber (3), and an overflow structure for discharging upper standing clear water is arranged in the clear water chamber (4).

2. An integrated self-draining emergency oil sump as claimed in claim 1, wherein: the overflow structure comprises an overflow weir (5); the overflow weir (5) is a stainless steel thin-wall weir which is arranged in the clear water chamber (4) along the vertical direction, and a water outlet confluence groove (7) which is communicated with a clear water outlet (6) on the side wall of the clear water chamber (4) is arranged between the overflow weir (5) and the clear water chamber (4); the top elevation of the clear water outlet (6) is lower than that of the overflow weir (5).

3. An integrated self-draining emergency oil sump as claimed in claim 2, wherein: the bottom of the water outlet confluence groove (7) is an inclined slope surface structure which is close to the lower end of the clean water outlet (6) and is far away from the higher end of the clean water outlet (6).

4. An integrated self-draining emergency oil sump as claimed in claim 1, wherein: the oil-water mixed liquid circulation device also comprises a backflow chamber (8) used for increasing the flow stroke of the oil-water mixed liquid; the oil storage chamber (3) and the clear water chamber (4) are respectively arranged at two sides of the backflow chamber (8).

5. An integrated self-draining emergency oil sump as claimed in claim 4, wherein: a plurality of groups of grid inner walls (9) are arranged in the backflow cavity (8); one end of each grid inner wall (9) is connected to a side wall on one side of the backflow chamber (8), a vertical solid wall body with a flow passing gap is reserved between the other end of each grid inner wall and the side wall on the other side of the backflow chamber, the flow passing gaps of the adjacent grid inner walls (9) are arranged in a staggered mode, and a baffling structure is formed in the backflow chamber (8).

6. An integrated self-draining emergency oil sump as claimed in claim 1, wherein: the lowest part of the oil accumulation pit (2) is provided with a through hole (10) penetrating through the transformer foundation (1); an oil-water mixed liquid falling platform (11) is arranged in the oil storage chamber (3) and is positioned right below the through hole (10); the oil-water mixed liquid dropping platform (11) is a horizontal wall body which is fixed on the side wall of the oil storage chamber (3) and is suspended in the oil storage chamber (3).