A sludge discharge device for a sewage treatment sedimentation tank

Abstract

The utility model discloses a kind of sewage treatment sedimentation tank sludge discharge devices, mainly related to the field of sewage treatment equipment maintenance. Including linear horizontal extension's strip-shaped rack, one end of the strip-shaped rack is equipped with the front vertical axis of downward vertical extension, and another end is slidably connected with rear vertical axis along its length direction, two scrapers are hinged on the front vertical axis, the scraper is vertically arranged and is in the shape of "^", two bracing plates are hinged on the rear vertical axis, the bracing plate is hingedly connected with the one side of the internal corner of scraper away from the rear vertical axis, elastic member is equipped between the front vertical axis and rear vertical axis, so that the both are close to each other. The utility model has the beneficial effect that it can adapt to the change of inlet channel, and effectively dredge the side wall and bottom of inlet channel simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment maintenance, specifically a sludge removal device for sewage treatment sedimentation tanks. Background Technology

[0002] Radial flow sedimentation tanks with simultaneous inflow and outflow are advanced and efficient wastewater treatment equipment. The peripheral inlet channel, a key structure for achieving uniform water distribution, faces a significant challenge in cleaning and clearing sedimentation due to its unique annular, gradually narrowing structure. The channel's width gradually narrows from the inlet to the outlet, with a corresponding increase in the density of distribution holes. While this design aims to ensure uniform effluent, it also leads to a decrease in flow velocity along the channel, particularly at the outlet where stagnant water zones easily form, inevitably causing suspended solids to settle and accumulate. Lightweight debris carried by the water flow also tends to accumulate here, further exacerbating the risk of blockage.

[0003] Siltation at the bottom of the inlet channel can trigger a series of operational problems. The most direct impact is the disruption of water distribution uniformity. Silt blocks the water distribution holes at the end, causing most of the water to rush into the sedimentation tank from the near end, creating a hydraulic short circuit and flow deviation. This severely disrupts the ideal flow state in the sedimentation tank, resulting in a shortened residence time for solid particles, a significant decrease in settling efficiency, an increase in the concentration of suspended solids in the effluent, and increased load on subsequent treatment units. A clogged inlet channel may also overflow into the adjacent inner-circle outlet channel, directly affecting the water treatment effect.

[0004] However, existing technologies have significant limitations in cleaning this unique structure. Traditional manual cleaning methods are inefficient, unsafe, and unable to thoroughly clean every corner of channels with varying widths. The inlet channel gradually narrows from the inlet to the outlet, making it difficult for traditional scrapers to adapt. Ordinary scrapers are usually fixed in size and cannot move flexibly in channels with varying widths. For example, when working at the wider inlet, the scraper may not be able to effectively cover the entire bottom, while at the narrower outlet, the scraper may not be able to enter, resulting in cleaning dead spots.

[0005] In summary, the root cause of siltation in the inlet channel of a radial flow sedimentation tank lies in its inherent hydraulic and structural characteristics, while existing cleaning technologies are insufficient in terms of adaptability, efficiency, and safety, thus creating an urgent need for improvement. Utility Model Content

[0006] The purpose of this utility model is to provide a sludge removal device for sewage treatment sedimentation tanks, which can adapt to changes in the inlet channel and effectively clean the side walls and bottom of the inlet channel at the same time.

[0007] To achieve the above objectives, this utility model employs the following technical solution: A sludge removal device for a wastewater treatment sedimentation tank includes a horizontally extending strip frame. One end of the strip frame is provided with a downwardly extending front vertical shaft, and the other end is slidably connected to a rear vertical shaft along its length. Two scrapers are hinged on the front vertical shaft. The scrapers are upright and in a "^" shape. Two support plates are hinged on the rear vertical shaft. The end of the support plate away from the rear vertical shaft is hinged to the inner corner of the scraper. An elastic element is provided between the front and rear vertical shafts to bring them closer together.

[0008] The front vertical shaft has a telescopic rod extending in the same direction as the slide groove in the middle. The rear vertical shaft has a telescopic sleeve coaxial with the telescopic rod fixed in the middle. The telescopic rod is inserted into the telescopic sleeve and the two are telescopically coordinated. The elastic element is set in the telescopic sleeve. The elastic element is used to connect the telescopic sleeve and the telescopic rod, and has an elastic force to pull the telescopic rod into the telescopic sleeve.

[0009] The bottom side of the strip frame is provided with a sliding groove, and a sliding block is slidably connected in the sliding groove. The top end of the rear vertical shaft is fixed on the sliding block.

[0010] The strip frame has four first vertical shafts fixed on each side, arranged symmetrically in pairs on both sides. The upper part of the strip frame has a sliding plate that slides along its length. A tension spring is provided between the strip frame and the sliding plate to bring them closer together. The sliding plate has four second vertical shafts extending vertically upward, arranged symmetrically in pairs on both sides of the strip frame. The front-to-back distance between the second vertical shafts is the same as that between the first vertical shafts. A fixed connecting rod is hinged to the first vertical shaft, and a sliding connecting rod is hinged to the second vertical shaft. The front end of the sliding connecting rod near the front vertical shaft is hinged to the middle of the fixed connecting rod. A guide wheel is rotatably mounted on the end of the fixed connecting rod away from the strip frame.

[0011] The upper part of the strip frame has a horizontal through-hole. The slide plate is inserted into the slide hole and the two are slidably connected. The two sides of the slide plate are respectively provided with baffles on both sides of the frame. The minimum spacing of the baffles is adapted to the width of the frame. A rear spring seat is fixed on the top side of the baffle. A front spring seat is fixed at one end of the strip frame near the front vertical shaft. The tension spring is arranged between the front spring seat and the rear spring seat.

[0012] A reinforcing plate is fixed to the upper part of the scraper. The reinforcing plate is a steel plate, and the outer and bottom areas of the scraper are made of rubber scraper material.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This device is designed specifically for the inlet channel of a radial flow sedimentation tank with simultaneous inlet and outlet flow. It features a highly efficient and adaptable sludge removal system. Utilizing the elastic convergence of the front and rear vertical shafts, the two V-shaped scrapers tend to expand outwards at an increasing angle. This allows the scrapers to effectively scrape sludge from the inner wall of the inlet channel while adapting to variations in channel width. The spacing between the outer edges of the scrapers matches the channel width, enabling effective sludge removal from the inner wall and bottom of inlet channels of varying widths. Simultaneously, the bottom sides of the two scrapers clean the bottom of the inlet channel, achieving a comprehensive cleaning of both the inner wall and bottom in a single operation. The design is simple and easy to maintain, effectively reducing operating and maintenance costs and improving the efficiency and convenience of sedimentation tank operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front end of the entire utility model.

[0015] Figure 2 This is a side view of the structure of this utility model.

[0016] Figure 3 This is a schematic diagram showing the components of this utility model disassembled.

[0017] Figure 4 This is a schematic diagram of the bottom structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the present invention operating in a sedimentation tank.

[0019] Figure 6 This is a utility model Figure 5 N enlarged images.

[0020] The labels shown in the attached diagram: 1. Strip frame; 2. Front vertical shaft; 3. Rear vertical shaft; 4. Slide groove; 5. Telescopic rod; 6. Telescopic sleeve; 7. Scraper; 8. Support plate; 9. First vertical shaft; 10. Second vertical shaft; 11. Upper sliding hole; 12. Slide plate; 13. Side guard; 14. Rear spring seat; 15. Front spring seat; 16. Tension spring; 17. Fixed connecting rod; 18. Sliding connecting rod; 19. Guide wheel. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0022] Unless otherwise specified, the instruments, reagents, and materials used in the following embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods used in the following embodiments are all conventional experimental methods and detection methods already available in the prior art. Example

[0023] This device is specifically designed for radial flow sedimentation tanks with simultaneous inlet and outlet, and is used to clean the inlet channel. Because the inlet channel is used to distribute the incoming water, it is not a uniform ring; its outer wall is the outermost layer of the sedimentation tank wall, is relatively high, and has a ring-shaped platform around it for easy inspection and movement. The inlet channel gradually narrows from the inlet end to the outlet end, and the number and density of the water distribution holes gradually increase from the inlet end to the outlet end. Based on this characteristic, the main structure of this example includes a strip frame 1, one end of which has a downwardly extending vertically extending front shaft 2. The bottom side of the strip frame 1 has a sliding groove 4, within which a lower slide block is slidably connected. A downwardly extending vertically extending rear shaft 3 is fixed on the lower slide block.

[0024] A horizontally extending telescopic rod 5 is fixed in the middle of the front vertical shaft 2. The length direction of the telescopic rod 5 is consistent with the length direction of the sliding groove 4. Two scrapers 7 are hinged on the front vertical shaft 2. The scrapers 7 are set vertically and are in the shape of "^". The included angle of the two scrapers 7 can be adjusted adaptively, so that the distance between the outer sides of the two scrapers 7 can adapt to the width change of the water inlet channel. The bottom side of the scraper 7 is the bottom side of the lower sludge scraping, and the vertical side of the scraper 7 away from the front vertical shaft 2 is the vertical side of the sludge scraping. The inner wall of the water inlet channel is scraped and cleaned by the vertical side of the sludge scraping, and the bottom surface of the water inlet channel is scraped and cleaned by the bottom side of the sludge scraping.

[0025] A reinforcing plate is fixed to the upper part of the scraper 7. The reinforcing plate is a steel plate, which is used to improve the strength of the scraper 7. The scraping bottom side and the scraping vertical side area of ​​the scraper 7 are made of rubber scraper 7 material.

[0026] Two support plates 8 are hinged to the rear vertical shaft 3. The support plates 8 are respectively located above and below the telescopic rod 5. The end of the support plate 8 away from the rear vertical shaft 3 is hinged to the inside corner of the scraper 7. The expansion range of the two scrapers 7 is supported by the support plates 8 of equal length.

[0027] A telescopic sleeve 6, coaxial with the telescopic rod 5, is fixed at the middle of the rear vertical shaft. The telescopic rod 5 is inserted into the telescopic sleeve 6, and the two work together to achieve telescopic movement in the same direction as the sliding groove 4. An elastic element is installed inside the telescopic sleeve 6. The elastic element is used to connect the telescopic sleeve 6 and the telescopic rod 5, and has an elastic force to pull the telescopic rod 5 into the telescopic sleeve 6, so that the telescopic rod 5 and the telescopic sleeve 6 have a tightening elastic force. Under the action of the support plate 8, this force can be reflected on the scraper 7, so that the scraper 7 has a tendency to open outward, thus always maintaining scraping against the side wall of the water inlet channel. Furthermore, due to the elastic telescopic function of the telescopic rod 5 and the telescopic sleeve 6, the opening size of the scraper 7 can passively adapt to the changes in the width of the inner wall of the water inlet channel.

[0028] The strip frame 1 has four first vertical shafts 9 fixed on both sides, and they are arranged symmetrically in pairs on both sides of the strip frame 1.

[0029] The upper part of the strip frame 1 has a horizontally penetrating upper sliding hole 11. A sliding plate 12 is inserted into the upper sliding hole 11 and slidably connected thereto. The sliding plate 12 has side guards 13 on both sides of the frame. The minimum spacing of the side guards 13 is adapted to the width of the frame, thereby limiting the sliding stroke of the sliding plate 12. This sliding design has no complex limiting shape, the overall structure is simple, and it is not easily damaged. A rear spring seat 14 is fixed to the top side of the side guard 13. A front spring seat 15 is fixed to one end of the strip frame 1 near the front vertical shaft 2. A tension spring 16 is provided between the front spring seat 15 and the rear spring seat 14. The tension spring 16 has an elastic force that pulls the sliding plate 12 forward. A second vertical shaft 10 extending vertically upward is fixed on the sliding plate 12. There are four second vertical shafts 10, symmetrically arranged in pairs on both sides of the strip frame 1. The front-to-back spacing of the second vertical shafts 10 is the same as the front-to-back spacing of the first vertical shaft 9.

[0030] A fixed connecting rod 17 is hinged to the first vertical shaft 9, and a sliding connecting rod 18 is hinged to the second vertical shaft 10. The four sliding connecting rods 18 slide synchronously back and forth relative to the strip frame 1 based on the slide plate 12. The front end of the sliding connecting rod 18 near the front vertical shaft 2 is hinged to the middle of the fixed connecting rod 17. The fixed connecting rod 17 is rotatably mounted with a guide wheel 19 at the end away from the strip frame 1.

[0031] Based on the above structure, there are four sets of support wheel mechanisms on both sides of the strip frame 1. Through the four sets of herringbone wheel frame structures, combined with the forward sliding force of the slide plate 12, the guide wheel 19 is pressed against the inner wall of the water inlet channel, which assists in guiding and centering the movement of the entire device. The auxiliary device scrapes mud in the center of the water inlet channel.

[0032] With the above structure, this device can fully adapt to changes in the width of the inlet channel while maintaining effective sludge scraping on both sides of the inlet channel and the bottom of the inlet channel. Therefore, as the device moves along the inlet channel, it can efficiently and thoroughly clean the sludge. By pushing the sludge in a fixed direction and combining it with sludge pumps, grabbing equipment, and shoveling operations, the sludge can be cleaned.

[0033] The movement of this device can rely on various methods; only a few common methods are given as examples here: For rotating full-bridge or half-bridge cable trays, this device can be connected to the corresponding position below the cable tray via connecting rods or flexible chains. For example, a hook can be set at the front end of the strip frame 1, and a hanging ring can be set at the bottom end of the connecting rod and hung on the hook. The top end of the connecting rod is hinged or hooked to the cable tray. Alternatively, flexible connectors such as chains can be used to connect the hook and the cable tray. As the cable tray rotates, the device is pulled to rotate one revolution along the inlet channel. This method is flexible and does not require an additional power structure, making it the most convenient to use.

[0034] It can be used in conjunction with an automatic walking trolley, which moves on a platform around the sedimentation tank. The device is mounted on the trolley. Specifically, the structure can be that tie rods are set at the front and rear ends of the strip frame 1, and connecting rods are hinged or attached to the tie rods. The outer ends of the connecting rods are hooked to the walking trolley, driving the self-walking trolley to move around the inlet channel once, dragging the device to scrape in the inlet channel.

[0035] Electrically driven wheels can also be added to this device to enable automatic movement, or it can be manually pushed.

[0036] Not limited to the examples above, any other structure capable of driving this device is acceptable.

Claims

1. A sludge removal device for a wastewater treatment sedimentation tank, characterized in that, The machine includes a horizontally extending strip frame. One end of the strip frame is provided with a vertically extending front shaft, and the other end is slidably connected to a rear shaft along its length. Two scrapers are hinged on the front shaft. The scrapers are upright and in the shape of "^". Two support plates are hinged on the rear shaft. The end of the support plate away from the rear shaft is hinged to the inside corner of the scraper. An elastic element is provided between the front shaft and the rear shaft to bring them closer together.

2. The sludge removal device for a wastewater treatment sedimentation tank according to claim 1, characterized in that, The front vertical shaft has a telescopic rod extending in the same direction as the slide groove in the middle. The rear vertical shaft has a telescopic sleeve coaxial with the telescopic rod fixed in the middle. The telescopic rod is inserted into the telescopic sleeve and the two are telescopically coordinated. The elastic element is set in the telescopic sleeve. The elastic element is used to connect the telescopic sleeve and the telescopic rod, and has an elastic force to pull the telescopic rod into the telescopic sleeve.

3. The sludge removal device for a wastewater treatment sedimentation tank according to claim 1, characterized in that, The bottom side of the strip frame is provided with a sliding groove, and a sliding block is slidably connected in the sliding groove. The top end of the rear vertical shaft is fixed on the sliding block.

4. The sludge removal device for a wastewater treatment sedimentation tank according to claim 1, characterized in that, The strip frame has four first vertical shafts fixed on each side, arranged symmetrically in pairs on both sides. The upper part of the strip frame has a sliding plate that slides along its length. A tension spring is provided between the strip frame and the sliding plate to bring them closer together. The sliding plate has four second vertical shafts extending vertically upward, arranged symmetrically in pairs on both sides of the strip frame. The front-to-back distance between the second vertical shafts is the same as that between the first vertical shafts. A fixed connecting rod is hinged to the first vertical shaft, and a sliding connecting rod is hinged to the second vertical shaft. The front end of the sliding connecting rod near the front vertical shaft is hinged to the middle of the fixed connecting rod. A guide wheel is rotatably mounted on the end of the fixed connecting rod away from the strip frame.

5. The sludge removal device for a wastewater treatment sedimentation tank according to claim 4, characterized in that, The upper part of the strip frame has a horizontal through-hole. The slide plate is inserted into the slide hole and the two are slidably connected. The two sides of the slide plate are respectively provided with baffles on both sides of the frame. The minimum spacing of the baffles is adapted to the width of the frame. A rear spring seat is fixed on the top side of the baffle. A front spring seat is fixed at one end of the strip frame near the front vertical shaft. The tension spring is arranged between the front spring seat and the rear spring seat.

6. The sludge removal device for a wastewater treatment sedimentation tank according to claim 1, characterized in that, A reinforcing plate is fixed to the upper part of the scraper. The reinforcing plate is a steel plate, and the outer and bottom areas of the scraper are made of rubber scraper material.

Images