Automatic cleaning device for secondary sedimentation tank

Abstract

The utility model provides a kind of two sedimentation tanks automatic cleaning device, it is related to sewage treatment technical field.The device includes submersible pump, pipeline and spray head installed on mud scraper, 360° unobstructed rotation cleaning is realized by sliding contact line power supply system, utilize water pressure accurately and efficiently remove algae attached on overflow weir.Sliding contact line adopts annular guide rail structure, equipped with spring pre-tightening type needle collector, ensure dynamic contact stability;The application of carbon brush or copper alloy brush improves wear resistance and conductivity, cooperate with insulating sheath and dustproof waterproof shield, guarantee electrical safety.Water pump sends water to spray head by PVC pipeline, overflow weir is washed, and algae is blown out.The utility model solves the security risk of traditional manual cleaning, can set cleaning time, cleaning cycle according to actual situation, cleaning coverage reaches 99%, saves artificial cost 100,000 yuan per year, applicable to the efficient automation operation of sewage treatment plant.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for automated cleaning of the overflow weir of a secondary sedimentation tank. Background Technology

[0002] In wastewater treatment systems, the secondary sedimentation tank, as a key structure for solid-liquid separation, directly impacts effluent quality and system stability through the cleanliness of its overflow weir. For a long time, due to the presence of eutrophic substances in the water, algae and biofilms easily proliferate on the surface of the overflow weir, leading not only to weir blockage and uneven effluent flow but also to odors and secondary pollution. Traditional cleaning methods primarily rely on manual labor, requiring workers to use long-handled tools or chemical agents to scrub the weir. However, this method has significant drawbacks: First, secondary sedimentation tanks typically have high walls (generally 3-5 meters), posing a risk of falls, especially in slippery conditions; second, algae multiply rapidly, requiring multiple cleanings daily, resulting in extreme labor intensity, and the use of chemical agents can easily cause secondary water pollution; furthermore, traditional mechanical cleaning equipment is often fixed in place, leading to complex structures, poor adaptability, and high maintenance costs, making it difficult to meet the continuous operation requirements of wastewater treatment plants. Therefore, developing a safe, efficient, and sustainable automated cleaning device has become an urgent need to improve the operational efficiency and safety of wastewater treatment systems.

[0003] To address this issue, an automatic cleaning device for secondary sedimentation tanks is proposed. Utility Model Content

[0004] In view of this, the present invention provides a safe, efficient and sustainable secondary sedimentation tank cleaning device to solve the above-mentioned problems of traditional cleaning methods.

[0005] The secondary sedimentation tank cleaning device provided in this application includes a submersible pump, pipes, and nozzles installed on a sludge scraper. A sliding contact line is installed at the center of the sludge scraper's rotation, and the submersible pump is electrically connected to an external power source through the sliding contact line. The sliding contact line power supply system solves the problem of traditional cable entanglement, enabling the cleaning device to rotate 360° without obstruction for cleaning.

[0006] Further description of the aforementioned scheme: the sliding contact line is installed below the rain shield. The sliding contact line includes a guide rail, a conductive rail, and a current collector. The current collector is slidably installed on the annular guide rail and abuts against the conductor inside the conductive rail.

[0007] Furthermore, the current collector includes several spring pins, each comprising an upper pin, a spring, a lower pin, a housing, and a terminal block. The upper pin, spring, and lower pin are installed inside the housing. The spring is installed between the upper and lower pins, pushing them out from the upper and lower ends of the housing, respectively. The top of the terminal block abuts against the lower pin, and the bottom of the terminal block connects to the water pump cable. The upper pin abuts against the conductor inside the conductive rail. The spring pin preload is 8-12N to ensure dynamic contact stability. The internal insulating sleeve of the housing encloses the live parts, with a creepage distance ≥12mm to prevent phase-to-phase short circuits.

[0008] Furthermore, the outer shell is threaded onto the slider, and the outer shell also features an external hexagonal joint. This threaded connection allows for quick assembly and disassembly of the current collector in 3 minutes, improving maintenance efficiency by 60%. The inner side of the outer shell has a first insulating sleeve to cover the circumference of the upper and lower needles. This first insulating sleeve is 2mm thick and has a voltage withstand rating of AC1500V, ensuring electrical safety.

[0009] Furthermore, a second insulating sleeve is provided on the outer periphery of the terminal block, and the terminal block is installed in the through hole of the slider.

[0010] Furthermore, the upper needle tip uses either a carbon brush or a copper alloy brush. The carbon brush upper needle tip has a Rockwell hardness of HRC25, offering three times the wear resistance of a copper brush. The copper alloy brush has a conductivity ≥45 MS / m, reducing contact temperature rise and allowing for an operating temperature <60℃.

[0011] Furthermore, there are four spring pins, located on both sides of the guide rail; the conductive rail includes an outer conductive rail and an inner conductive rail, which are installed on the outer and inner sides of the guide rail respectively. Both the outer and inner conductive rails are provided with two conductors that are electrically connected to an external power source.

[0012] Optionally, an insulating sleeve is provided between the conductive rail and the conductor, and dustproof and waterproof covers are also provided on both sides of the conductive rail.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention breaks through the technical bottleneck of traditional secondary sedimentation tank cleaning methods through an innovative sliding contact line power supply system and high-pressure water gun cleaning technology, achieving a comprehensive upgrade in safety, efficiency, and environmental protection; 360° unobstructed rotation cleaning, increasing the coverage rate to 99%; eliminating the use of chemical agents, reducing sodium hypochlorite consumption by 12 tons per year; reducing labor costs, saving approximately 100,000 yuan in labor expenses annually, while also reducing the safety hazard of personnel falling into the tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A top view of a secondary sedimentation tank provided for existing technology;

[0017] Figure 2 A schematic cross-sectional view of a secondary sedimentation tank provided for existing technology;

[0018] Figure 3 Schematic diagram of the installation of rain shield, sliding contact line mechanism, PVC pipe and nozzle provided for embodiments of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the sliding contact line mechanism provided in an embodiment of the present utility model;

[0020] Figure 5 A bottom view of the sliding contact line mechanism provided in an embodiment of this utility model;

[0021] Figure 6 A schematic diagram of the current collector and guide rail installation provided for an embodiment of this utility model;

[0022] Figure 7 This is a schematic cross-sectional view of the current collector and sliding contact line installation provided in an embodiment of the present utility model;

[0023] Figure 8 A schematic diagram of a projectile explosion provided for an embodiment of this utility model;

[0024] Figure 9 This is a schematic cross-sectional view of the spring pin provided in an embodiment of the present utility model;

[0025] Figure 10 A schematic diagram of the circuit principle provided for an embodiment of this utility model.

[0026] The following are the labeling elements in the figure:

[0027] 1. Rain shield; 11. Guide rail; 2. Conductive rail; 21. Outer conductive rail; 22. Inner conductive rail; 23. Conductor; 3. Current collector; 31. Spring pin; 311. Upper needle; 312. Spring; 313. Lower needle; 314. First insulating sleeve; 315. Outer shell; 3151. Cover; 316. Terminal block; 317. Second insulating sleeve; 4. Water pump cable; 41. Inlet wire; 5. Submersible pump; 6. Hose; 7. PVC pipe; 8. Nozzle.

[0028] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0031] Please see Figures 1-10 As shown, the secondary sedimentation tank cleaning device provided in this application includes a submersible pump 5, pipes, and nozzles 8 installed on a sludge scraper. A sliding contact line is provided at the center of the sludge scraper's rotation, and the submersible pump 5 is electrically connected to an external power source through the sliding contact line. The sliding contact line power supply system solves the problem of traditional cable entanglement, enabling the cleaning device to rotate 360° without obstruction. In this embodiment, a stainless steel WQ type submersible pump 5, model WQ15-10-1.5, with a head of 10m and a flow rate of 15m³ / h, is used. It is installed on a bracket below the sludge scraper, submerged in water, and connected to a hose 6 via a flange, rotating with the sludge scraper. The pipe is a PVC pipe 7 with a diameter of 32mm, extending along the sludge scraper's swing arm to above the overflow weir. One end of the pipe is connected to the hose 6, and the other end is connected to the nozzles 8.

[0032] like Figure 4 As shown, the sliding contact line is installed below the rain shield 1. The sliding contact line includes a guide rail 11, a conductive rail 2, and a current collector 3. The current collector 3 is slidably installed on the annular guide rail 11 and abuts against the conductor 23 inside the conductive rail 2. The guide rail 11 is a ring-shaped aluminum alloy guide rail with a diameter of 1.2m and is nickel-plated on the surface.

[0033] like Figure 6 , 7As shown in Figure 8, the current collector 3 includes several spring pins 31. Each spring pin 31 includes an upper pin 311, a spring 312, a lower pin 313, a housing 315, and a terminal block 316. The upper pin 311, spring 312, and lower pin 313 are installed inside the housing 315. The spring 312 is installed between the upper pin 311 and the lower pin 313, pushing the upper pin 311 and the lower pin 313 out of the upper and lower ends of the housing 315, respectively. The top of the terminal block 316 abuts against the lower pin 313, and the bottom of the terminal block 316 is connected to the water pump cable 4. The upper pin 311 abuts against the conductor 23 inside the conductive rail 2. The preload of the spring pins 31 and spring 312 is 8-12N to ensure dynamic contact stability. The inner insulating sleeve of the housing 315 wraps the live parts, with a creepage distance ≥12mm to prevent phase-to-phase short circuits. The outer shell 315 of the spring pin 31 is threaded onto the slider, and the outer shell 315 also has an external hexagonal notch for easy replacement and installation with a wrench. This threaded connection allows for quick disassembly and assembly of the current collector 3, improving maintenance efficiency by 60%. The inner side of the outer shell 315 has a first insulating sleeve 314 to wrap around the circumference of the upper needle 311 and lower needle 313. The first insulating sleeve 314 is 2mm thick and has a voltage withstand rating of AC1500V, ensuring electrical safety. Figure 9 As shown, a cover 3151 is also provided on the top of the housing 315 for easy replacement of the upper needle 311. A second insulating sleeve 317 is provided on the outer periphery of the terminal 316, and the terminal 316 is installed in the through hole of the slider. The upper needle 311 uses a carbon brush or a copper alloy brush. The Rockwell hardness of the carbon brush upper needle 311 is HRC25, and its wear resistance is 3 times better than that of the copper brush. The conductivity of the copper alloy brush is ≥45MS / m, which reduces the contact temperature rise and the operating temperature is <60℃.

[0034] In this embodiment, four spring pins 31 are provided, located on both sides of the guide rail 11. The conductive rail 2 includes an outer conductive rail 21 and an inner conductive rail 22, which are respectively installed on the outer and inner sides of the guide rail 11. Both the outer conductive rail 21 and the inner conductive rail 22 are provided with two conductors 23, which are electrically connected to an external power supply through an input line 41. In this embodiment, three of the four conductors 23 can be configured as three-phase power, with the other reserved; alternatively, they can be configured as single-phase power and a neutral wire, with two sets of redundant designs. The wiring can be configured according to actual needs, and the number of conductive rails 2 can also be increased. In some embodiments, an insulating sleeve is provided between the conductive rail 2 and the conductor 23, and dustproof and waterproof covers are also provided on both sides of the conductive rail 2.

[0035] To gain a more thorough and comprehensive understanding of the disclosure of this utility model, its principles will be further explained below in conjunction with its usage.

[0036] During operation, the sludge scraper drives the submersible pump 5 to rotate, and the current collector 3 slides along the guide rail 11, contacting the conductive rail 2 via the spring pin 31 to supply power. The sliding contact line ensures 360° cable entanglement-free operation, achieving fully automatic circulating cleaning. The submersible pump 5 draws clean water from the pool and delivers it to the nozzle 8 through the hose 6 and PVC pipe 7. The water pressure precisely and efficiently removes algae attached to the overflow weir and sprays the algae from the secondary sedimentation tank overflow weir out of the surrounding weir, ensuring uniform water discharge from each overflow weir and guaranteeing the stability and effluent quality of the wastewater treatment system.

[0037] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0039] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. An automatic cleaning device for a secondary sedimentation tank, characterized in that: The system includes a submersible pump (5), pipes, and nozzles (8) mounted on a sludge scraper. A sliding contact line is provided at the center of rotation of the sludge scraper, and the submersible pump (5) is electrically connected to an external power source through the sliding contact line. The sliding contact line includes a guide rail (11), a conductive rail (2), and a collector (3). The collector (3) is slidably mounted on the annular guide rail (11) and abuts against the conductor (23) inside the conductive rail (2). The collector (3) includes several spring pins (31), and each spring pin (31) includes an upper needle head (311), a spring (312), a lower needle head (313), and a housing (314). 5) and terminal block (316), the upper needle (311), spring (312) and lower needle (313) are installed inside the housing (315), the spring (312) is installed between the upper needle (311) and the lower needle (313), and pushes the upper needle (311) and the lower needle (313) out of the upper and lower ends of the housing (315) respectively, the top of the terminal block (316) abuts against the lower needle (313), the bottom of the terminal block (316) is connected to the water pump cable (4), and the upper needle (311) abuts against the conductor (23) in the conductive rail (2).

2. The automatic cleaning device for a secondary sedimentation tank according to claim 1, characterized in that: The outer side of the outer shell (315) is threaded onto the slider, and the outer shell (315) is also provided with an external hexagon; the inner side of the outer shell (315) is provided with a first insulating sleeve (314) for wrapping the periphery of the upper needle (311) and the lower needle (313).

3. The automatic cleaning device for a secondary sedimentation tank according to claim 1, characterized in that: The terminal block (316) is provided with a second insulating sleeve (317) on its outer periphery, and the terminal block (316) is installed in the through hole of the slider.

4. The automatic cleaning device for a secondary sedimentation tank according to claim 1, characterized in that: The upper needle (311) is made of carbon brush or copper alloy brush.

5. The automatic cleaning device for a secondary sedimentation tank according to claim 1, characterized in that: Four spring pins (31) are provided, located on both sides of the guide rail (11); the conductive rail (2) includes an outer conductive rail (21) and an inner conductive rail (22), which are respectively installed on the outer side and the inner side of the guide rail (11). The outer conductive rail (21) and the inner conductive rail (22) are each provided with two conductors (23) that are electrically connected to an external power source.

6. The automatic cleaning device for a secondary sedimentation tank according to claim 1, characterized in that: An insulating sleeve is provided between the conductive rail (2) and the conductor (23), and dustproof and waterproof covers are also provided on both sides of the conductive rail (2).

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