Self-cleaning device and method suitable for sewage pipeline deposition

Abstract

The invention belongs to the technical field of water environment treatment, and particularly relates to a self-cleaning device and method suitable for sewage pipeline deposition. The self-cleaning device comprises an inspection well, an upstream water inlet pipe and a downstream water outlet pipe, a horizontal supporting plate is connected to the side wall of the inspection well, and a gravity plate is placed on the upper surface of the free end of the horizontal supporting plate; the end, away from the water inlet, of the gravity plate is connected with an inclined water baffle, a water storage area is formed among the horizontal supporting plate, the inclined water baffle and the inspection well, and the middle or the lower portion of the inclined water baffle is connected with a twisting shaft. A reservoir is arranged at the top of the inclined water baffle, and a drainage hole is formed in the bottom of the reservoir; along with the change of the water volume of the water storage area, the gravity plates at the two ends of the inclined water baffle and the reservoir rotate up and down relative to the twisting shaft, so that water storage at a low water level and instant high-level drainage at a high liquid level can be realized. According to the method, the pollutant deposition amount of the sewage pipeline and the inspection well can be remarkably reduced, and meanwhile efficient pollutant transfer is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment treatment, and in particular relates to a self-cleaning device and method suitable for sewage pipe deposition. Background Art

[0002] In recent years, urban sewage pipes have had different degrees of siltation and blockage problems, especially those with a long history. The deposition of pollutants in sewage pipes and the biochemical reactions in the sediments have become one of the important reasons for the widespread low-carbon and high-nitrogen-phosphorus problems in urban sewage treatment plants in my country. In addition, in combined sewers, pollutants deposited in combined sewers are washed away and released into the water body during rainfall, seriously threatening the water environment quality of the receiving water body and causing the water body to turn black and smelly. The deposition of pollutants in sewage pipes includes the following reasons: First, the coefficient of variation of sewage volume is large, the water flow rate is too slow, and the sewage flow rate of the sewage pipe network is lower than the 0.6m / s required in the "Outdoor Drainage Design Standard" (GB 50014-2021). When the water flow rate in the sewage pipe network is too slow, the power brought by the flushing cannot take away the particles carried by the sewage, causing the solid particles to gradually settle down. Especially at the end of the pipe or in relatively flat areas, the water flow is insufficient and the sedimentation phenomenon is more obvious; secondly, the pipeline design is unreasonable. When the urban pipeline network is updated and renovated, the sewage pipeline diameter is not calibrated according to the actual drainage volume. The designed fullness does not match the actual fullness of the pipeline network, and it operates at a low flow rate, resulting in the deposition of pollutants in the sewage pipeline network.

[0003] At present, the industry is paying more and more attention to the deposition of pollutants in sewage pipe networks, but there is little work on how to prevent the deposition of pollutants in sewage pipe networks. At the same time, when the existing pipe network is updated and renovated, the pipe diameter of the sewage pipe network is not calibrated according to the actual drainage volume. It is difficult for the existing pipe network to solve the problems of pollution blockage and deposition through updating and transformation. In summary, it is urgent to construct a new drainage mode with a deposition self-cleaning device and method suitable for sewage pipes to solve the problems of low flow, slow water flow rate, and easy deposition of pollutants in pipe networks, so as to achieve efficient transfer and collection of pollutants and promote the high-quality development of urban sewage collection and treatment. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a self-cleaning device and method suitable for sewage pipe deposition. The present invention is based on the law of sewage volume change in sewage pipes, takes the deposition of pipe pollutants as the control object, and aims to solve the low influent concentration of sewage treatment plants and the deposition of pollutants in sewage inspection wells and sewage pipes. It provides a self-cleaning device and method suitable for sewage pipe deposition. The present invention can significantly reduce the amount of pollutant deposition in sewage pipes and inspection wells, and can solve the problem of pollutant deposition in sewage pipe networks caused by factors such as large coefficient of variation of sewage volume, slow water flow rate, and low flow. At the same time, it can achieve efficient transfer of pollutants, increase the influent concentration of sewage treatment plants, and help the high-quality development of urban sewage collection and treatment.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the present invention is: In a first aspect, an embodiment of the present invention provides a self-cleaning device suitable for sewage pipe sedimentation, comprising an inspection well, wherein the water inlet of the inspection well is connected to an upstream water pipe, the water outlet of the inspection well is connected to a downstream drainage pipe, and the setting height H of the water inlet is 进 Greater than or equal to the setting height H of the water outlet 出 ; A horizontal support plate is arranged inside the inspection well, and the arrangement height of the horizontal support plate is H<H 进 , one end of the horizontal support plate is arranged on the side wall of the inspection well, and a gravity plate is placed on the upper surface of the other end; One end of the gravity plate away from the water inlet is connected to the inclined water baffle plate, the front and rear sides of the inclined water baffle plate are connected to the side walls of the inspection well, a water storage area is formed between the horizontal support plate, the inclined water baffle plate and the inspection well, the middle or lower part of the inclined water baffle plate is connected to the torsion shaft, and the two ends of the torsion shaft are connected to the side walls of the inspection well; A water reservoir is provided on the top of the inclined water retaining plate, and a drainage hole is provided at the bottom of the water reservoir; As the water volume in the water storage area changes, the gravity plates and the water storage tank located at both ends of the inclined water retaining plate rotate up and down relative to the torsion shaft. The cooperation of the gravity plate, torsion shaft, inclined water retaining plate and water storage tank can realize the whole process of water storage at low water level and instantaneous high-level drainage to flush the bottom of the inspection well and the sediment in the downstream drainage pipe without external power and hydraulic control at high liquid level.

[0006] Furthermore, the gravity of the gravity plate itself G 重力板 Greater than the water reservoir's own gravity G 蓄水池 .

[0007] Furthermore, when the water level h of the water storage area is less than the vertical height H of the inclined water retaining plate 垂直 When the total gravity of the reservoir and the water therein is G总 Less than or equal to the gravity of the gravity plate itself G 重力板 When the gravity plate and the horizontal support plate are attached together or the gravity plate drives the inclined water retaining plate to rotate downward around the torsion axis, the separated gravity plate and the horizontal support plate gradually approach each other.

[0008] Furthermore, when the water level h of the water storage area is greater than or equal to the vertical height H of the inclined water retaining plate 垂直 , and the total gravity of the reservoir and the water therein G 总 Greater than the gravity of the gravity plate G 重力板 When the water tank drives the inclined water retaining plate to rotate downward around the torsion axis, the gravity plate is separated from the horizontal support plate.

[0009] Furthermore, when the water level h of the water storage area is greater than or equal to the vertical height H of the inclined water retaining plate 垂直 , and the total gravity of the reservoir and the water therein G 总 Less than or equal to the gravity of the gravity plate itself G 重力板 When the gravity plate is in contact with the horizontal support plate,

[0010] Furthermore, the diameter of the upstream water pipe is less than or equal to the diameter of the downstream drainage pipe.

[0011] Furthermore, the upstream water pipe and the downstream drainage pipe are made of one of rigid polyvinyl chloride plastic pipe, random copolymer polypropylene pipe, composite pipe, engineering plastic pipe, polybutylene pipe, corrugated pipe, polyethylene pipe and polyethylene winding structure wall pipe.

[0012] Furthermore, the inspection well is a prefabricated inspection well, made of reinforced concrete or PE material; Alternatively, the inspection well is constructed by on-site pouring of concrete and steel bars or on-site bricklaying, and during the on-site production process, the characteristic value of the foundation bearing capacity is guaranteed to be no less than 100 kPa.

[0013] Furthermore, one end of the horizontal support plate is connected to the side wall of the inspection well by embedding, and sewage is not allowed to pass through the connection between the horizontal support plate and the inspection well; The horizontal length of the horizontal support plate is less than or equal to the radius r of the inspection well.

[0014] In a second aspect, an embodiment of the present invention provides a self-cleaning method applicable to sewage pipe sediments, using the self-cleaning device described in the first aspect to flush and drain the sewage pipe sediments, including the following process: Process P1, water storage state: sewage continuously enters the inspection well from the water inlet and accumulates in the water storage area formed by the horizontal support plate, the inclined water retaining plate and the inspection well. The water level h in the water storage area increases continuously. When h is less than the vertical height H of the inclined water retaining plate, 垂直 When the total gravity of the reservoir and the water therein is G 总 Less than or equal to the gravity of the gravity plate itself G 重力板 When the horizontal support plate and the gravity plate are in contact with each other, Process P2, drainage state: As the amount of water in the water storage area continues to increase, when h is greater than or equal to the vertical height H of the inclined water retaining plate 垂直 When the sewage starts to enter the water reservoir, the amount of water entering the water reservoir is greater than the amount of water flowing out of the drainage hole at the bottom of the water reservoir; When the total weight of the water storage tank and the sewage therein is G 总 Greater than the gravity of the gravity plate G 重力板 When the gravity plate is separated from the horizontal support plate, the water reservoir is dumped, and the sewage, under the action of gravity, forms an instantaneous high-velocity physical flushing on the sediment at the bottom of the inspection well and the downstream drainage pipe, and the sediment is discharged into the next inspection well or municipal drainage pipe along with the sewage; Process P3, reset state: As the sewage in the water storage area is continuously discharged into the downstream inspection well or municipal sewage main, the water level h of the water storage area is continuously reduced. When h is less than the vertical height H of the inclined water retaining plate, the sewage no longer enters the water storage tank. When the total weight of the water storage tank and the sewage in it G 总 Less than the gravity of the gravity plate itself G 重力板 When the gravity plate is gradually reset, the horizontal support plate and the gravity plate are attached together, and the next water storage and flushing stage is entered; Process P4, cycle state: Process P1-process P3 are performed alternately and reciprocatingly.

[0015] The technical solution of the embodiment of the present invention has the following beneficial effects: (1) The present invention makes full use of the adjustable storage volume of the sewage inspection well. Through the working mode of small water volume storage and high liquid level drainage, part of the drainage can be temporarily accumulated in the well, which can form a high-efficiency flushing effect on the sediment generated in the sewage pipe network, significantly improve the efficient transfer of pollutants in the sewage pipe network, reduce the sedimentation of pollutants in the sewage pipe and inspection well, and realize smooth sewage drainage, providing new design ideas and reference basis for future sewage pipe network construction and renovation projects.

[0016] (2) The present invention is based on the construction and renovation of sewage pipe networks. The water storage and flushing device can be coupled to the inside of the inspection well, forming an automatic water storage and flushing process that relies on hydraulic automatic control. It can realize daily automatic operation without manual operation, ensuring drainage safety while the flushing device operates stably, without power consumption and low cost.

[0017] (3) The device of the present invention has the advantages of simple operation, strong applicability, low cost, and environmental friendliness, and can provide new design ideas and management concepts for smooth drainage and efficient transfer of pollutants.

[0018] (4) The present invention has significant advantages in improving the operational stability of the drainage system, reducing maintenance costs and enhancing environmental protection effects. It can support my country's efficient sewage collection, low-carbon operation of pipelines and increase the collection rate of urban domestic sewage, and help the drainage industry develop green, low-carbon and high-quality development. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods, usage methods or technical solutions in the prior art of the device of the present invention, a brief introduction will be given to the drawings required for use in the specific implementation methods, usage methods or technical solutions in the prior art. Obviously, the drawings described below are some embodiments of the device of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A front view of the self-cleaning device suitable for sewage pipe deposition provided by the present invention.

[0021] Figure 2 A top view of the self-cleaning device suitable for sewage pipe deposits provided by the present invention.

[0022] Figure 3 A schematic diagram of the process flow of the self-cleaning device suitable for sewage pipe deposition provided by the present invention.

[0023] Figure 4 A system diagram of a self-cleaning device suitable for sewage pipe deposition provided by the present invention.

[0024] Explanation of the reference numerals: 1-inspection well; 2-upstream water pipe; 3-horizontal support plate; 4-gravity plate; 5-torsion axis; 6-inclined water retaining plate; 7-water storage area; 8-drainage hole; 9-downstream drainage pipe; 10-water storage area; 11-upstream liquid level; 12-pipeline sediment; 13-self-cleaning device; 14-downstream liquid level. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solution and method of use of the invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, those skilled in the art, without paying creative labor, all fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", "the other side", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installation", "fitting", "separation" and the like should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1 like Figure 1 and 2 As shown, a self-cleaning device suitable for sewage pipe sedimentation includes an inspection well 1, the water inlet of the inspection well 1 is connected to an upstream water pipe 2, the water outlet of the inspection well 1 is connected to a downstream drainage pipe 9, and the setting height H of the water inlet 进 Greater than or equal to the setting height H of the water outlet 出 ; The water inlet of the upstream water pipe 2 is connected to the outlet pipe of the residential building or the sewage pipe of the commercial area or the sewage pipe of the industrial park, and the downstream drainage pipe 9 is directly connected to the downstream inspection well or the main pipe of the municipal sewage pipe network; A horizontal support plate 3 is provided inside the inspection well 1, and the setting height H of the horizontal support plate 3 is less than the setting height H of the water inlet. 进 , one end of the horizontal support plate 3 is arranged on the side wall of the inspection well 1, and a gravity plate 4 is placed on the upper surface of the other end; One end of the gravity plate 4 away from the water inlet is connected to the inclined water baffle 6, and the front and rear sides of the inclined water baffle 6 are connected to the side walls of the inspection well 1. A water storage area 10 is formed between the horizontal support plate 3, the inclined water baffle 6 and the inspection well 1. The middle or lower part of the inclined water baffle 6 is connected to the torsion shaft 5, and both ends of the torsion shaft 5 are connected to the side walls of the inspection well 1. A water reservoir 7 is provided on the top of the inclined water retaining plate 6, and a drainage hole 8 is provided at the bottom of the water reservoir 7; As the water volume in the water storage area 10 changes, the gravity plates 4 and the water storage tank 7 located at both ends of the inclined water retaining plate 6 rotate up and down relative to the torsion shaft 5. The cooperation of the gravity plates 4, the torsion shaft 5, the inclined water retaining plate 6 and the water storage tank 7 can realize the whole process of water storage at low water level and instantaneous high-level drainage to flush the sediments at the bottom of the inspection well 1 and the downstream drainage pipe 9 at high liquid level without external power and hydraulic control.

[0029] The drainage holes 8 are evenly distributed at the bottom of the water reservoir 7 and are used to drain the sewage in the water reservoir 7, thereby ensuring that the gravity plate 4 can be reset and the gravity plate 4 can be re-attached to the horizontal support plate 3.

[0030] Gravity plate 4 own gravity G 重力板 Greater than the water tank's own gravity G 蓄水池 .

[0031] When the water level h in the water storage area 10 is less than the vertical height H of the inclined water retaining plate 6 垂直 When the total gravity of the reservoir 7 and the water therein is G 总 Less than or equal to the gravity G of gravity plate 4 重力板 When the gravity plate 4 and the horizontal support plate 3 are attached together or the gravity plate 4 drives the inclined water retaining plate 6 to move downward, the separated gravity plate 4 and the horizontal support plate 3 gradually approach each other.

[0032] When the water level h in the water storage area 10 is greater than or equal to the vertical height H of the inclined water retaining plate 6 垂直 , and the total gravity of the reservoir 7 and the water therein G 总 When the gravity G of the gravity plate 4 is greater than its own gravity G, the water reservoir 7 drives the inclined water retaining plate 6 to move downward around the torsion axis 5, and the gravity plate 4 is separated from the horizontal support plate 3.

[0033] When the water level h in the water storage area 10 is greater than or equal to the vertical height H of the inclined water retaining plate 6 垂直 , and the total gravity of the reservoir 7 and the water therein G 总 Less than or equal to the gravity G of gravity plate 4 重力板 When the gravity plate 4 and the horizontal support plate 3 are attached together.

[0034] The diameter of the upstream water pipe 2 is smaller than or equal to the diameter of the downstream drainage pipe 9 .

[0035] The upstream water pipe 2 and the downstream drainage pipe 9 adopt one of the following: rigid polyvinyl chloride plastic pipe (UPVC), random copolymer polypropylene pipe (PP-R), composite pipe, engineering plastic pipe (ABS), polybutylene pipe (PB pipe), corrugated pipe (HDPE), polyethylene pipe (PVC) and polyethylene winding structure wall pipe (Type B).

[0036] Inspection well 1 is a prefabricated inspection well made of reinforced concrete or PE material.

[0037] One end of the horizontal support plate 3 is connected to the side wall of the inspection well 1 by embedding, and sewage is not allowed to pass through the connection between the horizontal support plate 3 and the inspection well 1; The horizontal length of the horizontal support plate 3 is less than or equal to the radius r of the inspection well 1 .

[0038] Example 2 like Figure 1 and 2 As shown, Figure 1 and 2 As shown, a self-cleaning device suitable for sewage pipe sedimentation includes an inspection well 1, the water inlet of the inspection well 1 is connected to an upstream water pipe 2, the water outlet of the inspection well 1 is connected to a downstream drainage pipe 9, and the setting height H of the water inlet 进 Greater than or equal to the setting height H of the water outlet 出 ; A horizontal support plate 3 is provided inside the inspection well 1, and the setting height H of the horizontal support plate 3 is less than the setting height H of the water inlet. 进 , one end of the horizontal support plate 3 is arranged on the side wall of the inspection well 1, and a gravity plate 4 is placed on the upper surface of the other end; One end of the gravity plate 4 away from the water inlet is connected to the inclined water baffle 6, and the front and rear sides of the inclined water baffle 6 are connected to the side walls of the inspection well 1. A water storage area 10 is formed between the horizontal support plate 3, the inclined water baffle 6 and the inspection well 1. The middle or lower part of the inclined water baffle 6 is connected to the torsion shaft 5, and both ends of the torsion shaft 5 are connected to the side walls of the inspection well 1. A water reservoir 7 is provided on the top of the inclined water retaining plate 6, and a drainage hole 8 is provided at the bottom of the water reservoir 7; As the water volume in the water storage area 10 changes, the gravity plates 4 and the water storage tank 7 located at both ends of the inclined water retaining plate 6 rotate up and down relative to the torsion shaft 5. The cooperation of the gravity plates 4, the torsion shaft 5, the inclined water retaining plate 6 and the water storage tank 7 can realize the whole process of water storage at low water level and instantaneous high-level drainage to flush the sediments at the bottom of the inspection well 1 and the downstream drainage pipe 9 at high liquid level without external power and hydraulic control.

[0039] The drainage holes 8 are evenly distributed at the bottom of the water reservoir 7 and are used to drain the sewage in the water reservoir 7, thereby ensuring that the gravity plate 4 can be reset and the gravity plate 4 can be re-attached to the horizontal support plate 3.

[0040] Gravity plate 4 own gravity G 重力板 Greater than the water tank's own gravity G 蓄水池 .

[0041] When the water level h in the water storage area 10 is less than the vertical height H of the inclined water retaining plate 6 垂直 When the total gravity of the reservoir 7 and the water therein is G 总 Less than or equal to the gravity G of gravity plate 4重力板 When the gravity plate 4 and the horizontal support plate 3 are attached together or the gravity plate 4 drives the inclined water retaining plate 6 to move downward around the torsion axis 5, the separated gravity plate 4 and the horizontal support plate 3 gradually approach each other.

[0042] When the water level h in the water storage area 10 is greater than or equal to the vertical height H of the inclined water retaining plate 6 垂直 , and the total gravity of the reservoir 7 and the water therein G 总 When the gravity G of the gravity plate 4 is greater than its own gravity G, the water reservoir 7 drives the inclined water retaining plate 6 to rotate downward around the torsion axis 5, and the gravity plate 4 is separated from the horizontal support plate 3.

[0043] When the water level h in the water storage area 10 is greater than or equal to the vertical height H of the inclined water retaining plate 6 垂直 , and the total gravity of the reservoir 7 and the water therein G 总 Less than or equal to the gravity G of gravity plate 4 重力板 When the gravity plate 4 and the horizontal support plate 3 are attached together.

[0044] The diameter of the upstream water pipe 2 is smaller than or equal to the diameter of the downstream drainage pipe 9 .

[0045] The upstream water pipe 2 and the downstream drainage pipe 9 adopt one of the following: rigid polyvinyl chloride plastic pipe (UPVC), random copolymer polypropylene pipe (PP-R), composite pipe, engineering plastic pipe (ABS), polybutylene pipe (PB pipe), corrugated pipe (HDPE), polyethylene pipe (PVC) and polyethylene winding structure wall pipe (Type B).

[0046] Inspection shaft 1 is constructed by on-site pouring of concrete and steel bars or on-site brickwork. During the on-site production process, the characteristic value of the foundation bearing capacity is guaranteed to be no less than 100 kPa.

[0047] One end of the horizontal support plate 3 is connected to the side wall of the inspection well 1 by embedding, and sewage is not allowed to pass through the connection between the horizontal support plate 3 and the inspection well 1; The horizontal length of the horizontal support plate 3 is less than or equal to the radius r of the inspection well 1 .

[0048] Example 3 A self-cleaning method suitable for sewage pipe sediments, using the above self-cleaning device to flush and drain the sewage pipe sediments, including the following process: Process P1, water storage status: Figure 3 As shown in a, sewage continuously enters the inspection well 1 from the water inlet and accumulates in the water storage area 10 formed by the horizontal support plate 3, the inclined water retaining plate 6 and the inspection well 1. The water level h in the water storage area 10 increases continuously. When h is less than the vertical height H of the inclined water retaining plate 6, 垂直 When the total gravity of the reservoir 7 and the water therein is G 总Less than or equal to the gravity G of gravity plate 4 重力板 When the horizontal support plate 3 and the gravity plate 4 are always in a fitted state; Process P2, drainage status: Figure 3 As shown in b and 3c, as the amount of water in the water storage area 10 continues to increase, when h is greater than or equal to the vertical height H of the inclined water retaining plate 6, 垂直 When the sewage starts to enter the water reservoir 7, the amount of water entering the water reservoir 7 is greater than the amount of water flowing out of the drainage hole 8 at the bottom of the water reservoir 7; When the total weight of the water storage tank 7 and the sewage therein is G 总 Greater than the gravity G of the gravity plate 4 重力板 When the gravity plate 4 is separated from the horizontal support plate 3 quickly, the water reservoir 7 is dumped, and the sewage forms an instantaneous high-velocity physical scouring on the sediment at the bottom of the inspection well 1 and the downstream drainage pipe 8 under the action of gravity, and the sediment is discharged into the next inspection well or municipal drainage pipe along with the sewage; Process P3, reset state: Figure 3 As shown in FIG. 4 , as the sewage in the water storage area 10 is continuously discharged into the downstream inspection well or municipal sewage main, the water level h in the water storage area 10 is continuously reduced. When h is less than the vertical height H of the inclined water retaining plate 6, 垂直 When the total weight of the water reservoir 7 and the sewage therein is G 总 Smaller than the gravity G of the gravity plate 4 重力板 When the gravity plate 4 is gradually reset, the horizontal support plate 3 and the gravity plate 4 are attached together, and the next water storage and flushing stage is entered; Process P4, cycle state: Process P1-process P3 are performed alternately and reciprocatingly.

[0049] like Figure 4 As shown, the self-cleaning device 14 of the present invention is a system for the new construction or renovation project of one or more inspection wells in the drainage network system. It can be understood that the above-mentioned flushing inspection well device is also suitable for drainage network systems on site of public buildings, enterprises, institutions, large-scale joint construction, etc.

[0050] The test results show that the scouring of pipeline sediments by water storage in the water storage area 10 is mainly traction transport rather than suspension transport, and suspension transport mainly occurs at the front end of the flushing water body along the flow direction. 垂直 , and the volume of the water storage area are positively correlated. 垂直 When the volume of the water storage area 10 is 0.3-0.8 m 3When the downstream pipe diameter is 100-500 mm, the pipeline sediment flushing distance is 75-15 m; when the sediment thickness is 2-20 cm, the flushing distance is 68-31 m.

[0051] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A self-cleaning device suitable for sewage pipe sedimentation, characterized in that: The inspection well (1) comprises a water inlet connected to an upstream water pipe (2), a water outlet connected to a downstream drainage pipe (9), and a setting height H of the water inlet. 进 Greater than or equal to the setting height H of the water outlet 出 ; A horizontal support plate (3) is arranged inside the inspection well (1), and the arrangement height of the horizontal support plate (3) is H<H 进 , one end of the horizontal support plate (3) is arranged on the side wall of the inspection well (1), and a gravity plate (4) is placed on the upper surface of the other end; The end of the gravity plate (4) away from the water inlet is connected to the inclined water baffle (6), and the front and rear sides of the inclined water baffle (6) are connected to the side walls of the inspection well (1). A water storage area (10) is formed between the horizontal support plate (3), the inclined water baffle (6) and the inspection well (1). The middle or lower part of the inclined water baffle (6) is connected to the torsion shaft (5), and the two ends of the torsion shaft (5) are connected to the side walls of the inspection well (1); A water reservoir (7) is provided on the top of the inclined water retaining plate (6), and a drainage hole (8) is provided on the bottom of the water reservoir (7); As the amount of water in the water storage area (10) changes, the gravity plates (4) and the water storage tank (7) located at both ends of the inclined water retaining plate (6) rotate up and down relative to the torsion shaft (5). The gravity plates (4), torsion shaft (5), inclined water retaining plate (6) and water storage tank (7) cooperate to achieve the whole process of water storage at low water level and instantaneous high-level drainage to flush the sediment at the bottom of the inspection well (1) and the downstream drainage pipe (9) without external power and hydraulic control.

2. The self-cleaning device suitable for sewage pipe deposition according to claim 1, characterized in that: The gravity plate (4) has its own gravity G 重力板 Greater than the water reservoir (7)'s own gravity G 蓄水池 .

3. The self-cleaning device suitable for sewage pipe deposition according to claim 1 or 2, characterized in that: When the water level h of the water storage area (10) is less than the vertical height H of the inclined water retaining plate (6) 垂直 When the total gravity of the water reservoir (7) and the water therein is G 总 Less than or equal to the gravity G of the gravity plate (4) 重力板 When the gravity plate (4) and the horizontal support plate (3) are attached together or the gravity plate (4) drives the inclined water retaining plate (6) to move downward, the separated gravity plate (4) and the horizontal support plate (3) gradually approach each other.

4. The self-cleaning device suitable for sewage pipe deposition according to claim 1 or 2, characterized in that: When the water level h of the water storage area (10) is greater than or equal to the vertical height H of the inclined water retaining plate (6) 垂直 , and the total gravity of the reservoir (7) and the water therein G 总 Greater than the gravity G of the gravity plate (4) 重力板 When the water reservoir (7) drives the inclined water retaining plate (6) to move downward, the gravity plate (4) is separated from the horizontal support plate (3).

5. The self-cleaning device suitable for sewage pipe deposition according to claim 1 or 2, characterized in that: When the water level h of the water storage area (10) is greater than or equal to the vertical height H of the inclined water retaining plate (6) 垂直 , and the total gravity of the reservoir (7) and the water therein G 总 Less than or equal to the gravity G of the gravity plate (4) 重力板 When the gravity plate (4) and the horizontal support plate (3) are in contact with each other, 6. The self-cleaning device suitable for sewage pipe deposition according to claim 1, characterized in that: The diameter of the upstream water pipe (2) is smaller than or equal to the diameter of the downstream drainage pipe (9).

7. The self-cleaning device suitable for sewage pipe sedimentation according to claim 1, characterized in that: The upstream water pipe (2) and the downstream drainage pipe (9) are made of one of a rigid polyvinyl chloride plastic pipe, a random copolymer polypropylene pipe, a polybutylene pipe, a corrugated pipe, a polyethylene pipe and a polyethylene winding structure wall pipe.

8. The self-cleaning device suitable for sewage pipe sedimentation according to claim 1, characterized in that: The inspection well (1) is a prefabricated inspection well made of reinforced concrete or PE material; Alternatively, the inspection well (1) is constructed by on-site pouring of concrete and steel bars or on-site brickwork, and during the on-site production process, the characteristic value of the foundation bearing capacity is ensured to be no less than 100 kPa.

9. The self-cleaning device suitable for sewage pipe sedimentation according to claim 1, characterized in that: One end of the horizontal support plate (3) is connected to the side wall of the inspection well (1) in an embedded manner, and sewage is not allowed to pass through the connection between the horizontal support plate (3) and the inspection well (1); The horizontal length of the horizontal support plate (3) is less than or equal to the radius r of the inspection well (1).

10. A self-cleaning method suitable for sewage pipe sedimentation, characterized in that: Using the self-cleaning device according to any one of claims 1 to 9 to flush and drain sediment from a sewage pipe comprises the following process: Process P1, water storage state: sewage continuously enters the inspection well (1) from the water inlet and is stored in the water storage area (10) formed by the horizontal support plate (3), the inclined water retaining plate (6) and the inspection well (1). The water level h of the water storage area (10) continuously increases. When h is less than the vertical height H of the inclined water retaining plate (6), the water level h of the water storage area (10) increases. 垂直 When the total gravity of the water reservoir (7) and the water therein is G 总 Less than or equal to the gravity G of the gravity plate (4) 重力板 When the horizontal support plate (3) and the gravity plate (4) are always in a fitted state; Process P2, drainage state: As the amount of water in the water storage area (10) continues to increase, when h is greater than or equal to the vertical height H of the inclined water retaining plate (6), 垂直 When the sewage starts to enter the water reservoir (7), the amount of water entering the water reservoir (7) is greater than the amount of water flowing out of the drainage hole (8) at the bottom of the water reservoir (7); When the total weight of the water storage tank (7) and the sewage therein is G 总 >The gravity of the gravity plate (4) G 重力板 When the gravity plate (4) is separated from the horizontal support plate (3), the water reservoir (7) is dumped, and the sewage, under the action of gravity, forms an instantaneous high-velocity physical flushing on the sediment at the bottom of the inspection well (1) and the downstream drainage pipe (8), and the sediment is discharged into the next inspection well or municipal drainage pipe along with the sewage; Process P3, reset state: As the sewage in the water storage area (10) is continuously discharged into the downstream inspection well or municipal sewage main, the water level h of the water storage area (10) is continuously reduced. When h is less than the vertical height H of the inclined water retaining plate (6), the sewage no longer enters the water storage tank (7). When the total weight G of the water storage tank (7) and the sewage therein is 总 Less than the gravity G of the gravity plate (4) itself 重力板 When the gravity plate (4) is gradually reset, the horizontal support plate (3) and the gravity plate (4) are attached together, and the next water storage and flushing stage is entered; Process P4, cycle state: Process P1-process P3 are performed alternately and reciprocatingly.

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