A sensitive self-draining accident oil pool

Abstract

The present invention relates to a sensitive self-draining accident oil pool, which is composed of an oil storage chamber and a clean water chamber; the oil storage chamber is connected to the bottom of the clean water chamber by a connecting channel; an oil-water mixed liquid inlet is provided on the side wall of the oil storage chamber; a clean water drain is provided on the side wall of the clean water chamber; a confluence chamber is provided in the clean water chamber, the upper end of the confluence chamber is open, and a thin-walled weir is provided along the open end, and the thickness is less than the thickness of the edge of the open end of the confluence chamber; the top elevation of the thin-walled weir is greater than the top elevation of the clean water drain. The present invention sets a very thin section of thin-walled weir at the overflow part of the confluence chamber, and the sensitivity of drainage is very high; a grille is set in the reflux chamber, which increases the distance before the oil-water mixture reaches the connecting channel in disguise, so that the separation effect of oil and clean water is greatly improved; the oil and water are automatically separated, and the clean water is automatically discharged, which reduces the amount of manual labor; the structure is simple and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of accident oil pools, and specifically to a sensitive self-draining accident oil pool. Background Art

[0002] As the main structure for draining oil after a transformer failure or fire, the transformer accident oil pool plays an important role in effectively avoiding the expansion of losses.

[0003] Transformer fire protection usually uses a water spray fire extinguishing system. When the fire protection system is activated, a large amount of water will be sprayed. At this time, the oil-water mixture falls into the main transformer oil pit, passes through the gaps between the bottom pebbles and cast iron grilles, and is collected into the accident oil pool through the oil drainage pipe. In non-accident situations, rainwater and waste oil will also be collected into the accident oil pool through the same path.

[0004] The design of transformer accident oil pools in substations currently under construction or in operation is generally simple, usually in the form of circular or square underground reinforced concrete structures. The advantages of these simple structures are that they can prevent the spread of fire, occupy a small area, have a simple structure, are economical and reliable, and are convenient for operation and maintenance or even maintenance-free. However, precisely because of the overly simple structure, the disadvantages of transformer accident oil pools in substations currently under construction or in operation are also obvious, that is, the oil-water separation effect is poor, resulting in secondary pollution caused by the discharge of waste oil.

[0005] There are also studies on dividing the interior of the accident oil pool to improve the oil-water separation effect. One approach is to set up a confluence chamber so that the separated water overflows over a section of the wall and then is discharged. Although this approach improves the oil-water separation effect to a certain extent, it still has the following disadvantages:

[0006] 1. The wall of the confluence chamber is very thick, and the clean water level needs to be higher than the elevation of the wall before it starts to overflow, so the sensitivity of the confluence chamber is not high.

[0007] 2. The oil-water mixture that flows into the oil pool directly reaches the confluence chamber through the connecting channel. The oil and clean water have not been completely separated, so that a considerable proportion of oil is still mixed in the discharged liquid. Summary of the invention

[0008] In view of the above problems, the present invention provides a sensitive self-draining accident oil pool, which achieves the purpose of improving drainage sensitivity by setting a thin-wall weir; by setting a grid, the distance before the oil-water mixture reaches the connecting channel is increased in disguise, thereby achieving the purpose of greatly improving the separation effect of oil and clean water; in addition, the oil and water can be automatically separated, and the clean water can be automatically discharged, thereby achieving the purpose of reducing manual labor; and the final invention has a simple structure and low cost.

[0009] To solve the above problems, the technical solution provided by the present invention is:

[0010] A sensitive self-draining accident oil pool, consisting of an oil storage chamber and a clean water chamber; the oil storage chamber and the bottom of the clean water chamber are connected by a connecting channel;

[0011] An oil-water mixture inlet is provided on the side wall of the oil storage chamber; a clean water outlet is provided on the side wall of the clean water chamber, and both the oil-water mixture inlet and the clean water outlet are located above the connecting channel;

[0012] A confluence chamber separated from the clean water chamber is provided at the side wall of the clean water drain port in the clean water chamber, the clean water drain port leads to the confluence chamber, the upper end of the confluence chamber is open, the opening is communicated with the clean water chamber, and a thin-walled weir is provided at the open end of the confluence chamber;

[0013] The thin-wall weir is fixedly arranged along the edge of the opening end of the confluence chamber, and the thickness of the thin-wall weir is smaller than the thickness of the edge of the opening end of the confluence chamber; the top elevation of the thin-wall weir is greater than the top elevation of the clean water drainage outlet.

[0014] Preferably, the clean water chamber is a rectangular box-shaped structure, comprising a rectangular bottom surface, three clean water chamber side walls perpendicular to the bottom surface and at the same elevation, and a rectangular clean water chamber top; a clean water chamber cover plate is detachably mounted on the clean water chamber top; and air holes are provided on the clean water chamber cover plate;

[0015] The oil storage chamber and the clean water chamber are separated by a partition wall; a communicating channel is arranged at the bottom of the partition wall; an oil storage chamber cover plate is detachably installed on the top of the oil storage chamber; and air holes are arranged on the oil storage chamber cover plate.

[0016] Preferably, the confluence chamber includes a confluence chamber side wall and a confluence chamber bottom plate; the confluence chamber bottom plate is a rectangle parallel to the bottom surface, and the four sides of the confluence chamber bottom plate are seamlessly connected to the three clean water chamber side walls and the confluence chamber side wall respectively; the confluence chamber side wall is perpendicular to the confluence chamber bottom plate.

[0017] Preferably, a reflux chamber is provided in the oil storage chamber; the reflux chamber includes a grille; the grille is a solid wall, the lower end of which is fixedly connected to the bottom of the oil storage chamber, and the upper end of which is fixedly connected to the top of the oil storage chamber.

[0018] Preferably, an oil suction pump platform is provided at the bottom of the oil storage chamber; the oil suction pump platform is located directly below the cover plate of the oil storage chamber; the elevation of the oil suction pump platform is greater than the elevation of the top of the bottom connecting channel.

[0019] Preferably, the center elevation of the oil-water mixture inlet is the same as the top elevation of the confluence chamber.

[0020] Preferably, the thin-wall weir is fixedly plugged into the upper end of the confluence chamber.

[0021] Preferably, the bottom elevation of the oil-water mixture inlet is higher than the top elevation of the clean water outlet.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. Since a very thin section of thin-walled weir is set at the overflow part of the confluence chamber, as long as clean water reaches the height of the thin-walled weir, it will immediately overflow into the confluence chamber, and the drainage sensitivity is very high.

[0024] 2. Since a grid is provided in the reflux chamber, the distance before the oil-water mixture reaches the connecting channel is increased in disguise, so that the separation effect of oil and clean water is greatly improved.

[0025] 3. Oil and water are automatically separated, and clean water is automatically discharged, reducing manual labor.

[0026] 4. Simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a plan view of the present invention.

[0028] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 3 for Figure 1 AA section view.

[0030] Figure 4 for Figure 1 BB cross-sectional view.

[0031] Figure 5 for Figure 3 CC cross-sectional view.

[0032] The numbers in the figure are as follows: 100. Oil storage chamber, 110. Oil storage chamber side wall, 120. Oil storage chamber top, 130. Oil storage chamber cover, 140. Oil-water mixture water inlet, 150. Reflux chamber, 160. Grille, 170. Oil suction pump platform, 200. Clean water chamber, 210. Clean water chamber side wall, 220. Clean water chamber top, 230. Clean water chamber cover, 240. Clean water drain outlet, 300. Confluence chamber, 320. Thin-wall weir, 330. Confluence chamber side wall, 340. Confluence chamber bottom plate, 400. Connecting channel, 410. Air hole, 420. Partition wall, 430. Handle. DETAILED DESCRIPTION

[0033] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0034] like Figure 1As shown, a sensitive self-draining accident oil pool is a rectangular box structure, including a rectangular oil pool bottom surface and four oil pool outer walls perpendicular to the oil pool bottom surface; the sensitive self-draining accident oil pool is composed of an oil storage chamber 100 and a clean water chamber 200. The elevation of the entire sensitive self-draining accident oil pool is not higher than the elevation of the bottom of the transformer oil collection tank it serves, so as to ensure that all the waste oil in the transformer oil collection tank flows into the sensitive self-draining accident oil pool.

[0035] like Figure 2 As shown, the clean water chamber 200 is arranged at a corner of the sensitive self-draining accident oil pool, and is a rectangular box-shaped structure, including a rectangular clean water chamber 200 bottom surface, three clean water chamber side walls 210 perpendicular to the ground and at the same elevation, a partition wall 420 for separating the clean water chamber 200 from the oil storage chamber 100, and a rectangular clean water chamber top 220; wherein:

[0036] like Figure 1 As shown, two adjacent clean water chamber side walls 210 overlap with two adjacent oil pool outer walls, and another clean water chamber side wall 210 is arranged inside the oil pool; a clean water drain port 240 is opened on a clean water chamber side wall 210 that overlaps with the oil pool outer wall; the bottom surface of the clean water chamber 200 overlaps with the bottom surface of the oil pool.

[0037] A connecting channel 400 is provided at the bottom of the partition wall 420 ; the clean water chamber 200 is connected to the bottom of the oil storage chamber 100 by the connecting channel 400 ; the oil-water mixture water inlet 140 and the clean water outlet 240 are both located above the connecting channel 400 .

[0038] The flow rate of the oil-water mixture inlet 140 is not greater than the flow rate of the connecting channel 400 .

[0039] A clean water chamber cover plate 230 is detachably mounted on the clean water chamber top 220 ; an air hole 410 is opened on the clean water chamber cover plate 230 .

[0040] A confluence chamber 300 separated from the clean water chamber 200 is provided at the side wall of the clean water drain outlet 240 in the clean water chamber 200. The clean water drain outlet 240 leads to the confluence chamber 300. The upper end of the confluence chamber 300 is open, and the opening is communicated with the clean water chamber 200. A thin-walled weir 320 made of stainless steel plate is provided at the open end of the confluence chamber 300.

[0041] like Figure 3 As shown, the confluence chamber 300 includes a confluence chamber side wall 330 and a confluence chamber bottom plate 340; the confluence chamber bottom plate 340 is a rectangle parallel to the ground, and the four sides of the confluence chamber bottom plate 340 are seamlessly connected to the three clean water chamber side walls 210 and the confluence chamber side wall 330 respectively; the confluence chamber side wall 330 is perpendicular to the confluence chamber bottom plate 340.

[0042] The top elevation of the confluence chamber 300 is higher than the highest water level of the external drainage pond / ditch set outside the sensitive self-draining accident oil pool, and the purpose of such setting is to prevent external water from flowing back. At the same time, due to the existence of the confluence chamber, the drainage is guaranteed to be smooth, and there is no need to specially install a siphon drainage pipe and its vacuum breaking device, which further reduces the cost.

[0043] The overflow speed of the confluence chamber 300 is not lower than the flow rate of the communication channel 400, and is not higher than the flow rate of the clean water drain port 240. In this way, it can be ensured that the clean water entering the clean water chamber 200 is promptly discharged from the accident oil pool through the clean water drain port 240, and will not accumulate too much.

[0044] The pipe diameter, roughness, longitudinal slope of the oil-water mixture inlet 140, the size of the connecting channel 400, the top net width of the confluence chamber 300, and the pipe diameter, roughness and longitudinal slope of the clean water outlet 240 all meet the above conditions.

[0045] The thin-walled weir 320 is fixedly arranged along the edge of the opening end of the confluence chamber 300, and the thickness of the thin-walled weir 320 is less than the thickness of the edge of the opening end of the confluence chamber 300; the thin-walled weir 320 is fixedly inserted at the upper end of the confluence chamber 300; the top elevation of the thin-walled weir 320 is greater than the top elevation of the clean water drain outlet 240.

[0046] like Figure 4 As shown, the liquid entering the clean water chamber 200 is mainly clean water, and the thin-walled weir 320 is made of stainless steel plate. When the water level of the clean water slightly exceeds the elevation of the thin-walled weir 320, it will overflow into the confluence chamber 300 and continue to be discharged to the outside of the sensitive self-draining accident oil pool through the clean water drain port 240. Compared with the very thick confluence chamber side wall made of traditional masonry concrete structure, the stainless steel plate is very thin, so the sensitivity of clean water overflow is better.

[0047] The oil storage chamber cover plate 130 is detachably mounted on the oil storage chamber top 120 ; an air hole 410 is opened on the oil storage chamber cover plate 130 ; and a handle 430 for lifting the oil storage chamber cover plate 130 is also provided on the oil storage chamber cover plate 130 .

[0048] An oil-water mixture inlet 140 is provided on the side wall 110 of the oil storage chamber;

[0049] like Figure 5 As shown, the oil storage chamber 100 is provided with a reflux chamber 150; the reflux chamber 150 includes a grid 160; Figure 3 As shown, the grid 160 is a solid wall, the lower end of which is fixedly connected to the bottom of the oil storage chamber 100, and the upper end of which is fixedly connected to the top of the oil storage chamber 120. The purpose of doing so is to increase the length and time of the oil-water mixture separation path and improve the oil-water separation effect.

[0050] An oil suction pump platform 170 is provided at the bottom of the oil storage chamber 100; the oil suction pump platform 170 is located directly below the oil storage chamber cover plate 130; the elevation of the oil suction pump platform 170 is greater than the elevation of the top of the connecting channel 400, so as to ensure the normal operation of the oil suction pump.

[0051] Obviously, the volume between the minimum immersion depth of the oil suction pump and the bottom of the oil storage chamber 100 is the permanent clean water and silt volume, which must be greater than the maximum silt volume within the design life and have sufficient margin to ensure that the silt does not occupy the flow section of the connecting channel 400.

[0052] The center elevation of the oil-water mixture inlet 140 is the same as the top elevation of the confluence chamber 300, which is to reduce the drop of the oil-water mixture entering the oil storage chamber 100 to reduce the impact and mixing of the oil-water mixture, and also to avoid the discharge of waste oil. The bottom elevation of the oil-water mixture inlet 140 is higher than the top elevation of the clean water outlet 240.

[0053] The volume of the oil storage chamber 100 between the design elevation of the surface of the sensitive self-draining accident oil pool and the oil-water balance interface is the effective oil storage volume of the sensitive self-draining accident oil pool. Obviously, the effective oil storage volume needs to be no less than the total amount of oil that may leak from the transformer served by the sensitive self-draining accident oil pool.

[0054] It should also be noted that the volume of the clean water chamber 200, i.e. the volume between the elevation of the confluence chamber 300 and the bottom of the clean water chamber 200, is smaller than the effective oil storage volume. This is to ensure that most of the volume of the sensitive self-draining accident oil pool is used to store oil.

[0055] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A sensitive self-draining accident oil pool, comprising an oil storage chamber (100) and a clean water chamber (200); the oil storage chamber (100) and the bottom of the clean water chamber (200) are connected by a connecting channel (400); Features: An oil-water mixture water inlet (140) is provided on the side wall (110) of the oil storage chamber; a clean water drainage outlet (240) is provided on the side wall (210) of the clean water chamber, and the oil-water mixture water inlet (140) and the clean water drainage outlet (240) are both located above the communicating channel (400); A confluence chamber (300) separated from the clean water chamber is provided at the side wall (210) of the clean water drain port (240) in the clean water chamber, the clean water drain port (240) leads to the confluence chamber (300), the confluence chamber (300) has an opening at the upper end, the opening communicates with the clean water chamber (200), and a thin-walled weir (320) is provided at the open end of the confluence chamber (300); The thin-walled weir (320) is fixedly arranged along the edge of the opening end of the confluence chamber (300), and the thickness of the thin-walled weir (320) is smaller than the thickness of the edge of the opening end of the confluence chamber (300); the top elevation of the thin-walled weir (320) is greater than the top elevation of the clean water drainage outlet (240); The thin-walled weir (320) is made of a stainless steel plate; when the water level of the clean water exceeds the height of the thin-walled weir (320), it overflows into the confluence chamber (300) and is continuously discharged to the outside of the sensitive self-draining accident oil pool through the clean water outlet (240); The clean water chamber (200) is a rectangular box-shaped structure, comprising a rectangular bottom surface, three clean water chamber side walls (210) perpendicular to the bottom surface and at the same elevation, and a rectangular clean water chamber top (220); a clean water chamber cover plate (230) is detachably mounted on the clean water chamber top (220); and an air hole (410) is provided on the clean water chamber cover plate (230); The oil storage chamber (100) and the clean water chamber (200) are separated by a partition wall (420); the communicating channel (400) is provided at the bottom of the partition wall (420); an oil storage chamber cover plate (130) is detachably mounted on the top (120) of the oil storage chamber; and air holes are provided on the oil storage chamber cover plate (130); The confluence chamber (300) comprises a confluence chamber side wall (330) and a confluence chamber bottom plate (340); the confluence chamber bottom plate (340) is a rectangle parallel to the bottom surface, and the four sides of the confluence chamber bottom plate (340) are seamlessly connected to the three clean water chamber side walls (210) and the confluence chamber side wall (330) respectively; the confluence chamber side wall (330) is perpendicular to the confluence chamber bottom plate (340); The oil storage chamber (100) is provided with a reflux chamber (150); the reflux chamber (150) comprises a grille (160); the grille (160) is a solid wall, the lower end of which is fixedly connected to the bottom of the oil storage chamber (100), and the upper end of which is fixedly connected to the top (120) of the oil storage chamber; An oil suction pump platform (170) is provided at the bottom of the oil storage chamber (100); the oil suction pump platform (170) is located directly below the oil storage chamber cover plate (130); the elevation of the oil suction pump platform (170) is greater than the elevation of the top of the communication channel (400); The center elevation of the oil-water mixture inlet (140) is the same as the top elevation of the confluence chamber; The thin-walled weir (320) is fixedly plugged into the upper end of the confluence chamber (300); The bottom elevation of the oil-water mixture water inlet (140) is higher than the top elevation of the clean water outlet (240); The volume of the clean water chamber (200) is the volume between the height of the confluence chamber (300) and the bottom of the clean water chamber (200), and must be smaller than the effective oil storage volume.

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