Oil stain cleaning device for water-collecting well

Abstract

The invention relates to the technical field of water collecting well cleaning and discloses a water collecting well greasy dirt cleaning device which comprises an oil collecting tank, a plurality of nozzles and a drainage pump, the oil collecting tank is arranged on one side wall of a water collecting well, and an oil inlet is formed in the top end of the oil collecting tank so that greasy dirt in the water collecting well can enter the oil collecting tank through the oil inlet; the multiple nozzles are arranged on the other side walls of the water collecting well at intervals, the spraying direction of at least part of the nozzles faces the oil inlet, and the nozzles are used for spraying water; the drainage pump is arranged in the water collecting well and used for controlling the liquid level in the water collecting well; wherein the drainage pump keeps the oil stain liquid level in the water collecting well at the height of the oil inlet, and the nozzle sprays water to push the oil stain into the oil inlet. According to the oil stain cleaning device for the water collecting well, an exclusive centralized collecting area is provided for oil stains through the oil collecting tank, oil stain dispersion is avoided, and cleaning is more targeted. Oil dirt is expelled through the nozzle by means of water jet, manual broom oil expelling is replaced, and manpower input is reduced.

Description

Technical Field

[0001] This invention belongs to the field of water collection well cleaning technology, specifically relating to a water collection well oil stain cleaning device. Background Technology

[0002] The hydropower plant's seepage collection well, located at the bottom of the plant, serves as a centralized collection area for leaking water. It also houses various components such as sensor sleeves and pump sleeves. During the operation or maintenance of the hydropower plant units, oil contaminants generated can flow into this collection well along with the leaking water.

[0003] Currently, the cleaning of oil spills in the seepage collection wells of hydropower plants relies entirely on manual labor. It requires multiple workers to work together, using brooms to drive the scattered oil spills into the same area. At least two people are responsible for collecting the oil spills on the water surface, while another person needs to transfer the collected oil spills to the ground. The overall operation is cumbersome, requires a large amount of manpower, and has low cleaning efficiency. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an oil sludge cleaning device for water collection wells. This device can clean and collect oil sludge in water collection wells, reducing manual labor and improving cleaning efficiency.

[0005] The oil sludge cleaning device for water collection wells according to an embodiment of the present invention includes: An oil collection tank is installed on one of the side walls of the water collection well. An oil inlet is provided at the top of the oil collection tank so that oil sludge in the water collection well can enter the oil collection tank through the oil inlet. Multiple nozzles are spaced apart on other sidewalls of the water collection well, and at least some of the nozzles are directed toward the oil inlet. The nozzles are used to spray water. A drainage pump is installed in the water collection well and is used to control the liquid level in the water collection well; The drainage pump maintains the oil level in the collection well at the height of the oil inlet, and the nozzle sprays water to push the oil into the oil inlet.

[0006] The oil sludge cleaning device for water collection wells in this invention provides a dedicated, centralized collection area for oil sludge through an oil collection tank, preventing oil dispersion and making cleaning more targeted. Through nozzles, water jets are used to directionally drive away the oil sludge, replacing manual sweeping and reducing manpower and operational complexity. A drainage pump precisely controls the liquid level and oil inlet to ensure smooth entry of oil sludge into the collection tank, improving collection efficiency. The synergy of these three components simplifies the work process, reduces the risks of working in confined spaces, minimizes the amount of water mixed in with the oil sludge, and lowers labor and waste oil disposal costs.

[0007] In some embodiments, the oil collection tank includes a mounting plate, which together with the bottom wall and side wall of the water collection well forms an oil collection space with a top opening, and the oil inlet communicates with the oil collection space.

[0008] The oil sludge cleaning device for water collection wells according to this invention uses an installation plate to quickly enclose the existing wall of the water collection well to form an oil collection space, requiring no additional large-scale modifications and making installation convenient. The oil collection space provides a closed and dedicated oil sludge storage area, preventing secondary diffusion of oil sludge and improving collection stability. The oil inlet is precisely connected to the oil collection space, ensuring smooth flow of the displaced oil sludge and reducing collection leakage.

[0009] In some embodiments, the horizontal cross-section of the mounting plate is arc-shaped, and a plurality of oil inlets are uniformly provided on the top of the mounting plate along the circumferential direction, with at least some of the oil inlets located on the same horizontal plane to receive oil from different directions.

[0010] In some embodiments, a first regulating valve is provided in the oil inlet, the first regulating valve being used to control the opening degree of the oil inlet.

[0011] In some embodiments, the horizontal cross-section of the water collection well is square, and a plurality of nozzles are evenly arranged on the three vertical sidewalls of the water collection well in the horizontal direction so that the water spray range covers the horizontal cross-section of the water collection well.

[0012] In some embodiments, the oil sludge cleaning device for the water collection well further includes a water supply pipe connected to a plurality of the nozzles, the water supply pipe being used to supply water to the nozzles, and the water supply pipe being connected to the inner wall of the water collection well to support the nozzles.

[0013] In some embodiments, the water supply pipe is provided with a plurality of second regulating valves, which are used to balance the water pressure ejected from the plurality of nozzles.

[0014] In some embodiments, the drainage pump is disposed at the bottom of the collection well.

[0015] In some embodiments, the oil sludge cleaning device for the water collection well further includes a water pump located in the oil collection space. The water pump's inlet is connected to the bottom of the oil collection space, and the water pump's outlet is connected to the water supply pipe. The water pump is used to supply water to the water supply pipe.

[0016] In some embodiments, the oil sludge cleaning device for the water collection well further includes a control unit connected to the first regulating valve and the water pump. The control unit controls the opening of the first regulating valve to balance the water pumping rate with the water inflow rate of the first regulating valve. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the present invention.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the oil collection tank 1 in this invention.

[0020] Figure label: 1. Oil collection tank; 11. Oil inlet; 12. Mounting plate; 13. Oil collection space; 14. First regulating valve; 2. Water collection well; 3. Nozzle; 4. Drain pump; 5. Water supply pipes; 6. Water pump. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figures 1-3 As shown, the oil sludge cleaning device for the water collection well in this embodiment of the invention includes an oil collection tank 1, multiple nozzles 3 and a drainage pump 4.

[0023] The oil collection tank 1 is installed on one of the side walls of the water collection well 2. The top of the oil collection tank 1 is provided with an oil inlet 11 so that the oil in the water collection well 2 can enter the oil collection tank 1 through the oil inlet 11. Multiple nozzles 3 are spaced apart on other side walls of the water collection well 2, and at least some of the nozzles 3 are directed toward the oil inlet 11. The nozzles 3 are used to spray water. Drainage pump 4 is installed in water collection well 2 and is used to control the liquid level in water collection well 2. The drainage pump 4 keeps the oil level in the collection well 2 at the height of the oil inlet 11, and the nozzle 3 sprays water to push the oil into the oil inlet 11.

[0024] The oil sludge cleaning device for water collection wells in this invention provides a dedicated, centralized collection area for oil sludge through an oil collection tank, preventing oil dispersion and making cleaning more targeted. Through nozzles, water jets are used to directionally drive away the oil sludge, replacing manual sweeping and reducing manpower and operational complexity. A drainage pump precisely controls the liquid level and oil inlet to ensure smooth entry of oil sludge into the collection tank, improving collection efficiency. The synergy of these three components simplifies the work process, reduces the risks of working in confined spaces, minimizes the amount of water mixed in with the oil sludge, and lowers labor and waste oil disposal costs.

[0025] Specifically, the drainage pump 4 draws water from the water collection well 2 and controls the oil level in the water collection well 2 at the height of the oil inlet 11 at the top of the oil collection tank 1; multiple nozzles 3, which are spaced apart on other side walls of the water collection well 2, spray water, with at least some of the nozzles 3 spraying in the direction of the oil inlet 11. The water flow propels the oil in the water collection well 2 toward the oil inlet 11, so that the oil enters the oil collection tank 1, and finally completes the centralized collection of oil.

[0026] In some embodiments, such as Figure 2 , Figure 3 As shown, the oil collection tank 1 includes a mounting plate 12, which together with the bottom wall and side wall of the water collection well 2 forms an oil collection space 13 with an open top, and the oil inlet 11 is connected to the oil collection space 13.

[0027] The oil sludge cleaning device for water collection wells according to this invention uses an installation plate to quickly enclose the existing wall of the water collection well to form an oil collection space, requiring no additional large-scale modifications and making installation convenient. The oil collection space provides a closed and dedicated oil sludge storage area, preventing secondary diffusion of oil sludge and improving collection stability. The oil inlet is precisely connected to the oil collection space, ensuring smooth flow of the displaced oil sludge and reducing collection leakage.

[0028] Specifically, the drainage pump 4 controls the oil level in the water collection well 2 to the height of the oil inlet 11, and multiple nozzles 3 spray water towards the oil inlet 11 to drive away the oil. The mounting plate 12 of the oil collection tank 1, together with the bottom wall and side wall of the water collection well 2, forms an oil collection space 13. The driven oil enters the connected oil collection space 13 through the oil inlet 11, realizing the centralized collection of oil.

[0029] In some embodiments, such as Figure 2 , Figure 3 As shown, the horizontal cross-section of the mounting plate 12 is arc-shaped, and multiple oil inlets 11 are evenly provided on the top of the mounting plate 12 along the circumferential direction. At least some of the oil inlets 11 are located on the same horizontal plane to receive oil from different directions.

[0030] The oil sludge cleaning device for water collection wells in this embodiment of the invention uses an arc-shaped mounting plate to guide the surrounding water flow and oil sludge towards the oil inlet, reducing the flow resistance of the oil sludge and improving the removal efficiency. Multiple evenly distributed oil inlets expand the oil sludge receiving range, simultaneously receiving oil sludge from multiple directions and avoiding the omission problem of single-point reception. Oil inlets on the same horizontal plane ensure that oil sludge from different directions can flow smoothly and synchronously into the oil collection space, guaranteeing consistent collection.

[0031] Specifically, multiple nozzles 3 spray water towards the oil inlet 11 to drive away the oil sludge; multiple oil inlets 11, which are evenly distributed along the circumference on the top of the mounting plate 12 with an arc-shaped horizontal cross section, simultaneously receive the oil sludge driven away from different directions, and the oil sludge enters the oil collection space 13 through the oil inlet 11 to complete centralized collection.

[0032] In some embodiments, such as Figure 2 , Figure 3 As shown, a first regulating valve 14 is provided in the oil inlet 11, which is used to control the opening degree of the oil inlet 11.

[0033] The oil sludge cleaning device for water collection wells in this embodiment of the invention can flexibly control the opening of the oil inlet through the first regulating valve. It can adjust the inflow speed according to the amount of oil sludge to avoid oil sludge overflow or too slow inflow. It can adapt to the oil sludge collection needs under different working conditions, improve the versatility and adaptability of the device, and can accurately control the oil sludge inflow rhythm. Combined with the water spray pressure of the nozzle, it can further ensure the stability of oil sludge collection.

[0034] Specifically, the drainage pump 4 maintains the oil level in the collection well 2 at the same level as the oil inlet 11, and the nozzle 3 sprays water towards the oil inlet 11 to drive away the oil. By adjusting the first regulating valve 14 set in the oil inlet 11, the opening of the oil inlet 11 is controlled to adapt to the inflow requirements of different amounts of oil, so that the oil can stably enter the oil collection space 13.

[0035] In some embodiments, such as Figure 1 As shown, the horizontal cross-section of the water collection well 2 is square, and multiple nozzles 3 are evenly arranged on the three vertical sidewalls of the water collection well 2 in the horizontal direction so that the water spray range covers the horizontal cross-section of the water collection well 2.

[0036] The oil sludge cleaning device for water collection wells in this embodiment of the invention achieves full coverage water spraying across the horizontal cross-section of the water collection well through evenly distributed nozzles, avoiding dead corners where oil sludge remains. The nozzles arranged on three side walls form a multi-directional, encircling water spray, enhancing the oil sludge removal force and improving collection efficiency.

[0037] Specifically, the drainage pump 4 controls the oil level in the water collection well 2 at the height of the oil inlet 11. In the water collection well 2 with a square horizontal cross-section, multiple nozzles 3 are evenly distributed on the three vertical side walls along the horizontal direction. The water spray range covers the horizontal cross-section of the water collection well 2, driving the oil inlet 11 from all directions so that it can flow smoothly into the oil collection space 13.

[0038] In some embodiments, such as Figure 1 , Figure 2 As shown, the oil sludge cleaning device for the water collection well also includes a water supply pipe 5, which is connected to multiple nozzles 3. The water supply pipe 5 is used to supply water to the nozzles 3. The water supply pipe 5 is connected to the inner wall of the water collection well 2 to support the nozzles 3.

[0039] The oil sludge cleaning device for the water collection well of this invention provides a stable water source for multiple nozzles through a water supply pipe, ensuring the continuous spraying of water to drive away oil sludge, achieving fixed support for the nozzles, avoiding nozzle displacement from affecting the spraying range and driving effect, integrating the water supply channels of multiple nozzles, simplifying pipeline layout, and improving the convenience of device installation and maintenance.

[0040] Specifically, the drainage pump 4 controls the oil level in the collection well 2 to the height of the oil inlet 11, and the water supply pipe 5, which is connected to multiple nozzles 3, continuously supplies water to the nozzles 3. The water supply pipe 5 is connected to the inner wall of the collection well 2 to achieve fixed support for the nozzles 3. The nozzles 3 spray water to push the oil towards the oil inlet 11, so that it flows into the oil collection space 13.

[0041] In some embodiments, a plurality of second regulating valves are provided in the water supply pipe 5, which are used to balance the water pressure ejected from the plurality of nozzles 3.

[0042] The oil sludge cleaning device for water collection wells in this invention uses a second regulating valve to precisely balance the water pressure of each nozzle, avoiding insufficient or excessive water pressure in certain areas and ensuring uniform oil sludge removal. The second regulating valve also adapts to differences in the installation positions of different nozzles, ensuring full coverage of the spray range and reducing oil residue. Furthermore, the second regulating valve flexibly adapts to water pressure requirements under different operating conditions, improving the stability and reliability of the device's operation.

[0043] Specifically, the water supply pipe 5 supplies water to multiple nozzles 3. Multiple second regulating valves installed in the water supply pipe 5 regulate the water flow of the corresponding branch, balance the water pressure sprayed from each nozzle 3, so that the nozzles 3 spray water evenly and stably push the oil sludge in the water collection well 2 toward the oil inlet 11.

[0044] In some embodiments, such as Figure 1 As shown, the drainage pump 4 is located at the bottom of the water collection well 2.

[0045] The oil sludge cleaning device for the water collection well in this embodiment of the invention can efficiently extract water by means of a drainage pump located at the bottom, quickly adjust the liquid level, improve the response speed of liquid level control, and the bottom installation can reduce the interference with the water flow and oil sludge flow in the water collection well, ensuring a smooth process of driving away and collecting.

[0046] Specifically, the drainage pump 4 installed at the bottom of the water collection well 2 draws water and precisely controls the oil level in the water collection well 2 to the height of the oil inlet 11, providing stable liquid level conditions for the nozzle 3 to spray water to drive away the oil and for the oil to flow into the oil collection space 13.

[0047] In some embodiments, such as Figure 2 As shown, the oil sludge cleaning device for the water collection well also includes a water pump 6, which is located in the oil collection space 13. The water inlet of the water pump 6 is connected to the bottom of the oil collection space 13, and the water outlet of the water pump 6 is connected to the water supply pipe 5. The water pump 6 is used to supply water to the water supply pipe 5.

[0048] The oil sludge cleaning device for water collection wells in this invention uses a water pump to achieve water recycling, eliminating the need for an external water source and saving water resources and supply costs. The water pump directly provides stable water pressure to the water supply pipe and nozzles, ensuring the strength and continuity of the water spray to drive away oil sludge.

[0049] Specifically, the water pump 6 is located in the oil collection space 13. Its inlet is connected to the bottom of the oil collection space 13 and its outlet is connected to the water supply pipe 5. The water pump 6 draws water and continuously supplies water to the water supply pipe 5. The water supply pipe 5 delivers water to multiple nozzles 3. The nozzles 3 spray water and push the oil in the water collection well 2 into the oil collection space 13.

[0050] In some embodiments, the oil sludge cleaning device for the water collection well further includes a control unit, which is connected to the first regulating valve 14 and the water pump 6. The control unit controls the opening of the first regulating valve 14 so that the water pumping volume of the water pump 6 is balanced with the water inlet volume of the first regulating valve 14.

[0051] The oil sludge cleaning device for the water collection well in this embodiment of the invention achieves automatic matching of water inflow and pumping flow through a control unit, eliminating the need for real-time manual adjustment and reducing operational complexity. The control unit precisely controls the flow balance, preventing water overflow or drying up within the oil collection space and ensuring continuous and stable operation of the device.

[0052] Specifically, the control unit is connected to the first regulating valve 14 and the water pump 6, and coordinates their operation in real time. The control unit adjusts the opening of the first regulating valve 14 according to the working conditions, and synchronously matches the pumping volume of the water pump 6, so that the pumping volume of the water pump 6 and the inlet volume of the first regulating valve 14 maintain a dynamic balance, ensuring the stability of oil collection and water circulation.

[0053] Working principle: The drainage pump 4 installed at the bottom of the water collection well 2 is started to extract water from the water collection well 2 and precisely control the level of the floating oil in the water collection well 2 at the horizontal level of the oil inlet 11 at the top of the oil collection tank 1. This provides a stable liquid level for subsequent oil removal and collection, and avoids affecting the efficiency of oil inflow due to excessively high or low liquid levels.

[0054] The water pump 6, located in the oil collection space 13 of the oil collection tank 1, starts operating. Its inlet is connected to the bottom of the oil collection space 13, drawing water from the oil collection space 13 (water flowing into the water collection well 2 through the oil inlet 11) and delivering it to the water supply pipe 5 through the drain outlet. The water supply pipe 5 is connected to the inner wall of the water collection well 2, which not only provides fixed support for the multiple nozzles 3, but also evenly distributes the water delivered by the water pump 6 to each nozzle 3, forming a stable water supply loop. No external water source is required, realizing water recycling.

[0055] Multiple second regulating valves installed in the water supply pipe 5 adjust the water flow pressure of the corresponding branches to ensure that the water pressure sprayed by the nozzles 3, which are evenly distributed horizontally along the three vertical sidewalls of the collection well 2, remains balanced, and the spraying range completely covers the square horizontal cross-section of the collection well 2. Multiple nozzles 3 spray water synchronously, forming a multi-directional encircling drive with the thrust of the water flow, pushing the dispersed oil sludge in the collection well 2 toward the oil inlet 11 of the oil collection tank 1; at the same time, the horizontal cross-section of the mounting plate 12 of the oil collection tank 1 is arc-shaped, which can guide the water flow and oil sludge to converge toward the oil inlet 11, reduce the flow resistance of the oil sludge, and improve the driving effect.

[0056] The oil collection tank 1, together with the bottom and side walls of the water collection well 2 via the mounting plate 12, forms a closed oil collection space 13. Multiple oil inlets 11, evenly spaced along the circumference at the top of the mounting plate 12, simultaneously receive oil sludge driven from different directions. The control unit coordinates the operation of the first regulating valve 14 and the water pump 6 in real time. By adjusting the opening of the first regulating valve 14 in the oil inlet 11, the water pumping rate of the water pump 6 and the oil inlet rate of the first regulating valve 14 are kept dynamically balanced, ensuring smooth flow of oil sludge into the oil collection space 13 and preventing oil overflow or slow flow, thus achieving centralized collection of oil sludge.

[0057] Throughout the cleaning process, the control unit continuously monitors the operating status of each component and dynamically adjusts the opening of the first regulating valve 14, the water pressure of the second regulating valve, and the operating parameters of the drainage pump 4 and the water pump 6 to ensure seamless connection of liquid level control, water flow driving, oil collection, and water circulation, maintaining the continuous and stable operation of the device until all the oil in the collection well 2 is collected into the oil collection space 13, ultimately completing the efficient cleaning of the oil.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A device for cleaning oil stains from a water collection well, characterized in that, include: An oil collection tank (1) is installed on one of the side walls of a water collection well (2). An oil inlet (11) is provided at the top of the oil collection tank (1) so that the oil in the water collection well (2) can enter the oil collection tank (1) through the oil inlet (11). Multiple nozzles (3) are spaced apart on other sidewalls of the water collection well (2), and at least some of the nozzles (3) are directed toward the oil inlet (11). The nozzles (3) are used to spray water. A drainage pump (4) is installed in the water collection well (2) and is used to control the liquid level in the water collection well (2); The drainage pump (4) maintains the oil level in the collection well (2) at the height of the oil inlet (11), and the nozzle (3) sprays water to push the oil into the oil inlet (11).

2. The oil sludge cleaning device for water collection wells according to claim 1, characterized in that, The oil collection tank (1) includes an installation plate (12), which together with the bottom wall and side wall of the water collection well (2) forms an oil collection space (13) with a top opening, and the oil inlet (11) is connected to the oil collection space (13).

3. The oil sludge cleaning device for water collection wells according to claim 2, characterized in that, The horizontal cross section of the mounting plate (12) is arc-shaped. The top of the mounting plate (12) is evenly provided with a plurality of oil inlets (11) along the circumferential direction. At least some of the oil inlets (11) are located on the same horizontal plane to receive oil from different directions.

4. The oil stain cleaning device for water collection wells according to claim 1 or 3, characterized in that, The oil inlet (11) is provided with a first regulating valve (14), which is used to control the opening degree of the oil inlet (11).

5. The oil sludge cleaning device for water collection wells according to claim 4, characterized in that, The horizontal cross-section of the water collection well (2) is square, and multiple nozzles (3) are evenly arranged on the three vertical sidewalls of the water collection well (2) in the horizontal direction so that the water spray range covers the horizontal cross-section of the water collection well (2).

6. The oil sludge cleaning device for water collection wells according to claim 5, characterized in that, It also includes a water supply pipe (5) which is connected to a plurality of the nozzles (3). The water supply pipe (5) is used to supply water to the nozzles (3). The water supply pipe (5) is connected to the inner wall of the water collection well (2) to support the nozzles (3).

7. The oil sludge cleaning device for water collection wells according to claim 6, characterized in that, The water supply pipe (5) is provided with a plurality of second regulating valves, which are used to balance the water pressure sprayed from the plurality of nozzles (3).

8. The oil sludge cleaning device for water collection wells according to claim 6, characterized in that, The drainage pump (4) is located at the bottom of the water collection well (2).

9. The oil sludge cleaning device for water collection wells according to claim 6, characterized in that, It also includes a water pump (6), which is located in the oil collection space (13). The water inlet of the water pump (6) is connected to the bottom of the oil collection space (13), and the water outlet of the water pump (6) is connected to the water supply pipe (5). The water pump (6) is used to supply water to the water supply pipe (5).

10. The oil sludge cleaning device for water collection wells according to claim 9, characterized in that, It also includes a control unit, which is connected to the first regulating valve (14) and the water pump (6). The control unit controls the opening of the first regulating valve (14) so ​​that the water pumping volume of the water pump (6) is balanced with the water inlet volume of the first regulating valve (14).

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