A wastewater pretreatment device

Abstract

The application relates to a wastewater pretreatment device and relates to the technical field of wastewater treatment, which comprises a pretreatment pool, a filter screen, a cleaning assembly, an impurity tank, a sludge scraping assembly and a sensing piece. A water inlet is formed in the side wall of the pretreatment pool, a slag outlet is formed in the pretreatment pool, a sliding groove is formed in the pretreatment pool, and the filter screen is slidingly installed in the sliding groove of the pretreatment pool; the cleaning assembly is installed on the pretreatment pool and is used for cleaning solid impurities on the filter screen; the impurity tank is fixedly installed at the slag outlet of the pretreatment pool, the impurity tank is communicated with the pretreatment pool, the sludge scraping assembly is installed on the pretreatment pool and is used for scraping off the sediment at the bottom of the pretreatment pool; and the sensing piece is installed on the pretreatment pool and is used for controlling the running state of the cleaning assembly and the sludge scraping assembly. The application has the effect of efficiently cleaning the surface of the filter screen.

Description

Technical Field

[0001] This application relates to the technical field of wastewater treatment, and in particular to a wastewater pretreatment device. Background Technology

[0002] Wastewater pretreatment is an indispensable part of industrial production. Its main purpose is to remove solid particles and other suspended matter carried in wastewater to reduce the burden on subsequent wastewater treatment equipment.

[0003] Traditional wastewater pretreatment methods mainly include filtration and sedimentation. Filtration involves passing wastewater through a porous filter medium, where impurities larger than the pores are blocked, while water can pass through, thus achieving a filtration effect. Sedimentation, on the other hand, uses facilities such as grit chambers or sedimentation tanks to allow impurities and suspended particles in the wastewater to settle to the bottom using gravity, thereby removing large particles and suspended solids.

[0004] With the aforementioned technologies, wastewater filtration can easily lead to filter screen clogging, requiring frequent manual cleaning. This not only increases maintenance costs but may also affect the overall treatment effect if cleaning is not timely. At the same time, the sludge deposited at the bottom of the pretreatment tank is prone to excessive accumulation due to the complex treatment process, further reducing the wastewater pretreatment efficiency. Summary of the Invention

[0005] In order to clean the surface of the filter screen in an energy-efficient and effective manner, thereby improving the efficiency of wastewater pretreatment, this application provides a wastewater pretreatment device.

[0006] This application provides a wastewater pretreatment device, which adopts the following technical solution: A wastewater pretreatment device, comprising: A pretreatment tank, wherein an inlet is provided on the side wall of the pretreatment tank, a slag outlet is provided on the pretreatment tank, a chute is provided on the pretreatment tank, and an outlet is provided on the side wall of the pretreatment tank. A filter screen, which is slidably installed in a chute within the pretreatment tank; A cleaning component is installed on the pretreatment tank, and the cleaning component is used to clean solid impurities from the filter screen; An impurity box is fixedly installed at the slag outlet of the pretreatment tank and is connected to the pretreatment tank. A sludge scraping assembly is installed on the pretreatment tank and is used to scrape off the sediment at the bottom of the pretreatment tank. A sensor is installed on the pretreatment tank and is used to control the operating status of the cleaning assembly and the sludge scraping assembly. The cleaning assembly includes a cleaning component, a pushing component, and a control component. The cleaning component is installed on the pretreatment tank and is used to clean and concentrate impurities on the filter screen. The pushing component is installed on the cleaning component and is used to push the impurities concentrated on the cleaning component into the impurity box. The control component is used to control the operating status of the pushing component.

[0007] By adopting the above technical solution, after the wastewater enters the pretreatment tank through the inlet, the filter screen intercepts impurities in the wastewater. As the impurities accumulate on the filter screen, the sensor is triggered, which controls the operation of the cleaning component and the sludge scraping component. The cleaning component gathers the solid impurities on the filter screen, and the control component controls the working state of the ejector component. The ejector component pushes the impurities gathered near the cleaning component into the impurity box, ensuring the effective cleaning of impurities on the filter screen. Meanwhile, the sludge scraping component removes the sediment accumulated at the bottom of the pretreatment tank, maintaining the long-term stable operation of the wastewater pretreatment. Through the coordinated work of various components, the cleaning efficiency of the filter screen surface is significantly improved, thereby improving the efficiency of wastewater pretreatment.

[0008] Optionally, the cleaning component includes: The motor, with its fixed end fixedly mounted above the treatment tank via a support frame; A rotating shaft, one end of which is coaxially and fixedly connected to the output end of the motor, the rotating shaft passing through the filter screen, and the rotating shaft being keyed to the filter screen; A sleeve, which is coaxially fitted and slidably mounted on the rotating shaft, with the sliding direction along the axial direction of the rotating shaft, and the bottom of the sleeve abutting against the filter screen; The mounting rod is arranged radially along the pretreatment tank, and one end of the mounting rod is slidably mounted on the sleeve, with the sliding direction along the axial direction of the rotating shaft; The brush bristles are fixedly installed at the bottom of the mounting rod and abut against the surface of the filter screen.

[0009] By adopting the above technical solution, the motor drives the rotating shaft to rotate, causing the filter screen to rotate around the axis of the rotating shaft. This causes the filter screen to rotate relative to the mounting rod and sleeve. Since the bristles are in close contact with the upper surface of the filter screen, the bristles can effectively clean the solid impurities attached to the filter screen during the rotation of the filter screen, and concentrate the solid impurities on the filter screen for easy subsequent processing.

[0010] Optional, the launcher includes: A first bevel gear is disposed inside the sleeve and coaxially disposed on the rotating shaft, and is keyed to the rotating shaft; A second bevel gear is disposed inside the sleeve and meshes with the first bevel gear. A reciprocating lead screw, which is inserted through and rotatably mounted in the mounting rod, with one end of the reciprocating lead screw coaxially fixedly mounted on the second bevel gear; A push plate is helically connected to the reciprocating lead screw. The bottom end of the push plate abuts against the filter screen, and the side of the push plate near the brush bristles abuts against the brush bristles.

[0011] By adopting the above technical solution, when the cleaning component is working, the rotating shaft drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate. This causes the reciprocating screw to rotate synchronously when the rotating shaft rotates, thereby driving the push plate to move linearly back and forth with the rotation of the reciprocating screw. This continuously pushes the impurities collected by the cleaning component towards the impurity box, preventing impurities from accumulating near the filter screen and brush bristles. This ensures the effective removal and centralized treatment of solid impurities, improving the working efficiency and cleanliness of the wastewater pretreatment device.

[0012] Optionally, the mounting rod has a snap-fit ​​groove at one end near the inner wall of the pretreatment tank, and the pretreatment tank has a sliding groove on the inner wall near the mounting rod. The control component includes: A sliding frame is slidably mounted on the pretreatment tank and disposed within the sliding groove; the sliding frame is fixedly mounted to the upper surface of the filter screen. The first telescopic rod has its fixed end fixedly installed on the sliding frame and its movable end fixedly installed on the mounting rod. The first airbag is fixedly installed at one end of the mounting rod near the pretreatment pool, and the first airbag is connected to the rodless cavity of the first telescopic rod. A first spring is vertically disposed within the rod cavity of the first telescopic rod; The second telescopic rod, the fixed end of the second telescopic rod is fixedly installed on the sliding frame; A locking block is fixedly installed on the movable end of the second telescopic rod. The locking block is provided with a guide slope and is adapted to the locking groove. The second airbag is fixedly installed on one end of the mounting rod near the sleeve, and the second airbag is connected to the rod cavity of the second telescopic rod; The second spring is disposed in the rodless cavity of the second telescopic rod.

[0013] By adopting the above technical solution, when the push block performs linear reciprocating motion, when the push block moves towards the impurity box, the push plate abuts against the filter screen. The push plate pushes the impurities that the cleaning parts have collected on the brush attachments toward the impurity box and pushes them into the impurity box. When the push block moves to one end near the impurity box, the push block squeezes the first air bladder. The gas in the first air bladder enters the rodless cavity of the first telescopic rod through the pipe, causing the first telescopic rod to extend and push the mounting rod upward. The locking block enters the locking groove, and the brush bristles no longer abut against the filter plate. At this time, the push block has reached the end of the mounting rod and moves in the opposite direction under the action of the reciprocating screw.

[0014] When the pusher moves away from the sludge bin, neither the pusher nor the brush bristles come into contact with the filter screen. This ensures that as the pusher moves towards the center of the filter screen, it does not push the concentrated sludge from the cleaning components towards the center of the device, preventing it from entering the sludge bin. When the pusher moves close to one end of the sleeve, it squeezes the second air bladder. The gas inside the second air bladder enters the rod cavity of the second telescopic rod through the pipe, causing the second telescopic rod to retract. The locking block disengages from the locking groove, the mounting rod falls, and the brush bristles come into contact with the filter screen again, cleaning the sludge on the filter screen. Simultaneously, under the action of the reciprocating screw, the pusher continues to push the sludge on the filter screen towards the sludge bin. This control component can effectively achieve precise movement control of the cleaning components, improving cleaning efficiency.

[0015] Optionally, the sludge scraping assembly includes: A support plate is fixedly installed on the rotating shaft, and the support plate is arranged along the diameter direction of the pretreatment tank; The scraper is provided with multiple scrapers spaced apart, and the sliding frame is fixedly installed on the support plate. The scraper abuts against the bottom wall of the pretreatment tank.

[0016] By adopting the above technical solution, when the rotating shaft rotates, it drives the support plate to rotate, which in turn drives the scraper to move along the bottom wall of the pretreatment tank. The scraper can be evenly distributed throughout the bottom of the pretreatment tank. During the rotation process, the scraper can effectively push the sludge deposited at the bottom of the tank to the central sludge discharge position, thereby preventing siltation at the bottom of the tank, effectively removing the sediment at the bottom of the pretreatment tank, and improving the effect and efficiency of wastewater pretreatment.

[0017] Optionally, the sludge scraping assembly further includes: A sludge tank, which is fixedly installed below the pretreatment tank; Cutting blades, wherein multiple cutting blades are provided, all of which are fixedly mounted on the rotating shaft and are disposed inside the sludge tank; A collection box, which is connected to the sludge box via a pipe; A sludge pump, which is installed on a pipeline.

[0018] By adopting the above technical solution, when the sludge is concentrated above the sludge tank by the scraper, the cutting blade rotates with the shaft, which can cut up large pieces of sludge when the shaft rotates, preventing blockage of the pipe. The collection tank and the sludge tank are connected by a pipe, ensuring that the scraped sludge can smoothly enter the collection tank, improving the efficiency of sludge transportation, making the sludge scraping process more efficient and reliable, reducing the maintenance frequency, and extending the service life.

[0019] Optionally, the sensing element includes: The third telescopic rod is provided in multiple circumferentially spaced positions. The fixed end of the third telescopic rod is fixedly installed in the trough of the pretreatment tank, and the movable end of the third telescopic rod abuts against the filter screen. A touch switch is fixedly installed in the rodless cavity of the third telescopic rod, and the touch switch is electrically connected to the motor.

[0020] By adopting the above technical solution, when solid impurities on the filter screen accumulate to a certain extent, they will press the movable end of the third telescopic rod, causing the third telescopic rod to compress and trigger the touch switch, thereby starting the motor to drive the cleaning and pushing parts to work, automatically cleaning the solid impurities on the filter screen. This design realizes automated control and improves the working efficiency and reliability of the device.

[0021] Optionally, a pull-out box is slidably installed inside the impurity box, and the bottom of the pull-out box is a screen.

[0022] By adopting the above technical solution, the sliding installation design of the pull-out box allows solid impurities in the impurity box to be easily removed and cleaned, improving operational convenience and work efficiency. At the same time, the screen at the bottom of the pull-out box can effectively prevent fine particles from entering the subsequent treatment stage with the water flow, ensuring the quality of wastewater pretreatment and the stable operation of the system.

[0023] Optionally, a baffle is fixedly installed at the bottom of the filter screen.

[0024] By adopting the above technical solution, the baffle can effectively prevent excessive water flow when wastewater enters the bottom of the pretreatment tank, avoid the already settled sludge from floating again under the impact of water flow, and improve the treatment efficiency of the device.

[0025] In summary, this application includes at least one of the following beneficial technical effects: By installing a filter screen and cleaning components that slide within the pretreatment tank, clogging of the filter screen can be effectively prevented, reducing the frequency of manual cleaning, thereby lowering maintenance costs and ensuring a continuous and stable wastewater treatment effect. The sludge scraping component allows the sediment at the bottom of the pretreatment tank to be removed in a timely manner, avoiding the problem of excessive sludge accumulation leading to a decrease in treatment efficiency, and improving the overall reliability and processing capacity of the device. The use of sensors enables intelligent control of the operating status of the cleaning and sludge scraping components. When cleaning or sludge scraping is detected, the corresponding components can be automatically activated, further improving the system's automation level and ease of operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the wastewater pretreatment device according to an embodiment of this application; Figure 2 This is a cross-sectional view of the wastewater pretreatment device according to an embodiment of this application; Figure 3 This is an embodiment of the present application. Figure 2 Enlarged view of a portion at point A; Figure 4 This is a cross-sectional view of the ejector in this embodiment of the application; Figure 5 This is an embodiment of the present application. Figure 4 A magnified view of section B; Figure 6 This is an embodiment of the present application. Figure 4 A magnified view of a portion of point C.

[0027] Explanation of reference numerals in the attached figures: 1. Pretreatment tank; 11. Inlet; 12. Outlet; 2. Filter screen; 3. Cleaning assembly; 31. Cleaning component; 311. Motor; 312. Shaft; 313. Sleeve; 314. Mounting rod; 315. Brush bristles; 32. Push-out component; 321. First bevel gear; 322. Second bevel gear; 323. Reciprocating screw; 324. Push plate; 33. Control component; 331. Sliding frame; 332. First telescopic rod; 33 3. First airbag; 334. First spring; 335. Second telescopic rod; 336. Locking block; 337. Second airbag; 338. Second spring; 4. Impurity box; 41. Pull-out box; 42. Screen; 5. Sludge scraping assembly; 51. Support plate; 52. Scraper; 53. Sludge box; 54. Cutting blade; 55. Collection box; 56. Sludge pump; 6. Sensor; 61. Third telescopic rod; 62. Touch switch; 7. Baffle. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses a wastewater pretreatment device.

[0033] Reference Figure 1 and Figure 2 The wastewater pretreatment device includes a pretreatment tank 1, a filter screen 2, a cleaning assembly 3, an impurity box 4, a sludge scraping assembly 5, and a sensor 6. The pretreatment tank 1 has an inlet 11 on its side wall, a sludge outlet, a chute, and an outlet 12 on its side wall. The filter screen 2 is slidably installed in the chute of the pretreatment tank 1. The cleaning assembly 3 is installed on the pretreatment tank 1 and is used to clean solid impurities from the filter screen 2. The impurity box 4 is fixedly installed at the sludge outlet of the pretreatment tank 1 and is connected to the pretreatment tank 1. The sludge scraping assembly 5 is installed on the pretreatment tank 1 and is used to scrape away sediment from the bottom of the pretreatment tank 1. The sensor 6 is installed on the pretreatment tank 1 and is used to control the operating status of the cleaning assembly 3 and the sludge scraping assembly 5.

[0034] During wastewater pretreatment, wastewater first enters the pretreatment tank 1 through inlet 11. When the water flows through filter screen 2, solid impurities are intercepted by filter screen 2. The water then enters the pretreatment tank 1, ready for further treatment. The intercepted impurities adhere to filter screen 2. As impurities accumulate on filter screen 2, when the triggering condition set by sensor 6 is reached, sensor 6 will control cleaning component 3 to start. Cleaning component 3 begins to clean the solid impurities on filter screen 2 and causes the impurities to fall into the impurity box 4 connected to it through the slag outlet of pretreatment tank 1 for collection.

[0035] At the same time, the sludge scraping component 5 is activated under the control of the sensor 6 to scrape the sludge at the bottom of the pretreatment tank 1, pushing the settled sludge to a position that is easy to discharge, ensuring that the sludge at the bottom of the tank does not accumulate excessively, and maintaining the good operating condition and high treatment efficiency of the pretreatment tank 1.

[0036] Reference Figure 3 and Figure 4 The sensing element 6 includes a third telescopic rod 61 and a touch switch 62. Four third telescopic rods 61 are arranged circumferentially and vertically. The fixed end of the third telescopic rod 61 is fixedly installed in the groove of the pretreatment tank 1, and the movable end of the third telescopic rod 61 abuts against the lower surface of the filter screen 2. The touch switch 62 is fixedly installed in the rodless cavity of the third telescopic rod 61.

[0037] During the operation of the wastewater pretreatment device, as wastewater continuously flows into the pretreatment tank 1 and passes through the filter screen 2, solid impurities gradually adhere to and accumulate on the filter screen 2. Due to the accumulation of impurities, the pressure on the filter screen 2 increases, which will squeeze the third telescopic rod 61 downward to make it contract. When it reaches a certain extent, it will trigger the touch switch 62. After the touch switch 62 is triggered, it sends a signal to the cleaning component 3. After receiving the signal, the cleaning component 3 starts up quickly and begins to work, thereby realizing automatic control of the working status of the cleaning component 3 and ensuring the efficient operation of the wastewater pretreatment device.

[0038] Reference Figure 1 and Figure 2 The cleaning component 3 includes a cleaning component 31, a pushing component 32, and a control component 33. The cleaning component 31 is installed on the pretreatment tank 1 and is used to clean and concentrate the impurities on the filter screen 2. The pushing component 32 is installed on the cleaning component 31 and is used to push the impurities concentrated on the cleaning component 31 into the impurity box 4. The control component 33 is used to control the operating status of the pushing component 32.

[0039] Reference Figure 2 and Figure 3The cleaning component 31 includes a motor 311, a rotating shaft 312, a sleeve 313, a mounting rod 314, and bristles 315. The pretreatment tank 1 has a cylindrical barrel structure with an open top. The fixed end of the motor 311 is fixedly installed above the treatment tank by a support frame and coincides with the axis of the pretreatment tank 1. The motor 311 is electrically connected to the touch switch 62. The rotating shaft 312 is vertically set, and one end of the rotating shaft 312 is coaxially fixedly connected to the output end of the motor 311. The rotating shaft 312 passes through the filter screen 2 and is keyed to the filter screen 2. The sleeve 313 is coaxially fitted and slidably installed on the rotating shaft 312. The sliding direction is along the axis of the rotating shaft 312. The bottom of the sleeve 313 abuts against the filter screen 2. The mounting rod 314 is cuboid and hollow inside. The mounting rod 314 is set radially along the pretreatment tank 1. One end of the mounting rod 314 is slidably installed on the sleeve 313. The sliding direction is along the axis of the rotating shaft 312. Multiple bristles 315 are set and fixedly installed at intervals at the bottom of the mounting rod 314.

[0040] During use, the motor 311 starts working after receiving the start signal from the touch switch 62. Its output drives the rotating shaft 312 to rotate. Since the rotating shaft 312 and the filter screen 2 are keyed, the rotating shaft 312 drives the filter screen 2 to rotate synchronously. During the rotation of the filter screen 2, the sleeve 313 remains relatively stationary, and the mounting rod 314 also remains stationary. However, the filter screen 2 moves relative to the mounting rod 314. The brush bristles 315 at the bottom of the mounting rod 314 will perform a cleaning action on the filter screen 2. The brush bristles 315 will sweep across the surface of the filter screen 2, gradually cleaning and concentrating the solid impurities attached to it, making it convenient to clean the impurities out of the pretreatment pool 1 later.

[0041] Reference Figure 4 and Figure 5 The ejector 32 includes a first bevel gear 321, a second bevel gear 322, a reciprocating screw 323, and a push plate 324. The first bevel gear 321 is disposed inside the sleeve 313 and is coaxially mounted on the rotating shaft 312 and keyed to the rotating shaft 312. The second bevel gear 322 is also disposed inside the sleeve 313 and meshes with the first bevel gear 321. The reciprocating screw 323 passes radially through the mounting rod 314 along the pretreatment tank 1. One end of the reciprocating screw 323 is coaxially fixedly mounted on the second bevel gear 322, and the other end of the reciprocating screw 323 is rotatably mounted on the mounting rod 314. The push plate 324 is helically connected to the reciprocating screw 323 and abuts against the mounting rod 314. The bottom of the push plate 324 abuts against the filter screen 2.

[0042] When the motor 311 of the cleaning component 31 starts and drives the rotating shaft 312 to rotate, since the first bevel gear 321 is coaxially mounted on the rotating shaft 312 and keyed to the rotating shaft 312, the rotating shaft 312 will drive the first bevel gear 321 to rotate synchronously. The rotation of the first bevel gear 321 will drive the second bevel gear 322 to rotate, thereby driving the reciprocating screw to rotate inside the mounting rod 314. When the reciprocating screw 323 rotates, the push plate 324 will move back and forth in a straight line along the reciprocating screw 323. During this process, the push plate 324 will gradually advance from one end of the mounting rod 314 to the other end, sweeping down the solid impurities that have accumulated near the mounting rod 314 and pushing them towards the slag outlet. Each reciprocating stroke of the push plate 324 can efficiently push the impurities gathered near the mounting rod 314, allowing them to fall smoothly into the impurity box 4.

[0043] Reference Figure 4 , Figure 5 and Figure 6 The control component 33 includes a sliding frame 331, a first telescopic rod 332, a first airbag 333, a first spring 334, a second telescopic rod 335, a locking block 336, a second airbag 337, and a second spring 338. A sliding groove is formed on the inner wall of the pretreatment tank 1 near the mounting rod 314. The sliding frame 331 is L-shaped and slidably installed in the sliding groove. The sliding frame 331 abuts against the upper part of the filter screen 2. The first telescopic rod 332 is vertically arranged, with its fixed end fixedly installed on the sliding frame 331 and its movable end fixedly installed on the mounting rod 314.

[0044] Reference Figure 2 and Figure 4 The first airbag 333 is fixedly installed at one end of the mounting rod 314 near the inner wall of the pretreatment tank 1. The first airbag 333 is connected to the rodless cavity of the first telescopic rod 332. The first spring 334 is vertically set in the rod cavity of the first telescopic rod 332. The second telescopic rod 335 is horizontally set. The fixed end of the second telescopic rod 335 is fixedly installed on the sliding frame 331. The locking block 336 is fixedly installed at the movable end of the second telescopic rod 335. The locking block 336 is provided with a guide slope. A locking groove is opened on one end of the mounting rod 314 near the inner wall of the pretreatment tank 1. The locking block 336 is adapted to the locking groove. The second airbag 337 is fixedly installed at one end of the mounting rod 314 near the sleeve 313. The second airbag 337 is connected to the rod cavity of the second telescopic rod 335. The second spring 338 is set in the rodless cavity of the second telescopic rod 335.

[0045] When the wastewater pretreatment device starts operating, as the push plate 324 moves towards the impurity box 4, it pushes the impurities collected near the bristles 315 by the cleaning parts 31 towards the impurity box 4 and sends them into the impurity box 4. When the push plate 324 moves to the end near the impurity box 4, it will squeeze the first airbag 333. Since the first airbag 333 is connected to the rodless cavity of the first telescopic rod 332, the gas in the first airbag 333 enters the rodless cavity of the first telescopic rod 332 through the pipe. Under the action of gas pressure, the first telescopic rod 332 overcomes the first spring. The elastic extension of 334 pushes the mounting rod 314 upward. As the mounting rod 314 rises, the locking block 336, guided by its guide slope, engages in the locking groove on the mounting rod 314. At this point, the brush bristles 315 no longer contact the filter screen 2. The push plate 324 has reached the end of the mounting rod 314 and begins to move in the opposite direction under the action of the reciprocating screw 323. This ensures that the push plate 324 will not push the impurities concentrated in the cleaning parts 31 towards the center of the device and thus prevent them from entering the impurity box 4 during its movement towards the center of the filter screen 2.

[0046] When the push plate 324 moves to the end near the sleeve 313, it will squeeze the second airbag 337. Since the second airbag 337 is connected to the rod chamber of the second telescopic rod 335, the gas in the second airbag 337 enters the rod chamber of the second telescopic rod 335 through the pipe. The gas pressure causes the second telescopic rod 335 to retract against the elastic force of the second spring 338, thereby driving the locking block 336 to disengage from the locking groove. After the locking block 336 disengages, the mounting rod 314 falls down, and the brush bristles 315 abut against the filter screen 2 again to continue cleaning the impurities on the filter screen 2. At the same time, under the action of the reciprocating screw 323, the push plate 324 begins to push the impurities on the filter screen 2 to move towards the impurity box 4. The control component 33 realizes precise motion control of the cleaning component 3, improving the cleaning efficiency.

[0047] Reference Figure 2 The sludge scraping assembly 5 includes a support plate 51, scrapers 52, a sludge tank 53, cutting blades 54, a collection tank 55, and a sludge pump 56. The support plate 51 is horizontally arranged, and its center is fixedly mounted on a rotating shaft 312. The support plate 51 is arranged along the diameter of the pretreatment tank 1. Multiple sets of scrapers 52 are fixedly installed and inclined on the support plate 51, and all scrapers 52 abut against the bottom wall of the pretreatment tank 1.

[0048] Reference Figure 2 The sludge tank 53 is fixedly installed at the bottom of the pretreatment tank 1 and is located at the center of the pretreatment tank 1. Four cutting blades 54 are provided. The four cutting blades 54 are arranged circumferentially along the rotating shaft 312 and fixedly installed on the rotating shaft 312. The cutting blades 54 are located inside the sludge tank 53. The collection tank 55 is connected to the sludge tank 53 through a pipe. The sludge pump 56 is installed on the pipe.

[0049] When the motor 311 starts and drives the rotating shaft 312 to rotate, the support plate 51 also rotates. The support plate 51 drives multiple sets of scrapers 52 to move along the bottom wall of the pretreatment tank 1. During the rotation, the sludge deposited at the bottom of the pretreatment tank 1 is gradually pushed towards the center. As the sludge is continuously pushed towards the center, it gradually accumulates above the sludge tank 53. At this time, the four cutting blades 54 rotate synchronously with the rotating shaft 312. The rotating cutting blades 54 cut large pieces of sludge into smaller pieces, preventing the sludge from causing blockage when entering the pipe. The cut sludge falls into the sludge tank 53 under the action of gravity. The sludge pump 56 installed on the pipe is started to transport the sludge in the sludge tank 53 to the collection tank 55 through the pipe. This effectively removes the sediment at the bottom of the pretreatment tank 1, ensuring the efficient operation of the wastewater pretreatment device and preventing the accumulation of sludge at the bottom of the tank from affecting the subsequent treatment effect.

[0050] Reference Figure 4 A pull-out box 41 is slidably installed inside the impurity box 4, with a screen 42 at the bottom. After the cleaning component 3 sweeps and collects the impurities on the filter screen 2, it pushes the impurities into the impurity box 4 through the pusher 32. The impurities fall into the pull-out box 41 inside the impurity box 4. Since the bottom of the pull-out box 41 is a screen 42, after the impurities fall into the pull-out box 41, the wastewater will flow out from the bottom of the pull-out box 41 through the screen 42 and return to the pretreatment tank 1 or enter the subsequent treatment stage, while the solid impurities are trapped in the pull-out box 41. When it is necessary to clean the impurities in the impurity box 4, the operator only needs to hold the handle of the pull-out box 41 and pull the pull-out box 41 outward to pull it out. After cleaning, the pull-out box 41 is pushed back into the impurity box 4 along the slide rail to restore it to its initial working position, waiting for the next round of impurity collection.

[0051] Reference Figure 4 A baffle 7 is fixedly installed at the bottom of the filter screen 2. The baffle 7 can effectively block the water flow, weaken the impact force of the water flow directly hitting the bottom of the pretreatment tank 1, and slow down the water flow speed. This avoids the sludge that has settled at the bottom of the pretreatment tank 1 being washed up and floated again due to excessive water flow, ensuring the stable operation of the pretreatment work.

[0052] The implementation principle of a wastewater pretreatment device in this application embodiment is as follows: wastewater flows into the pretreatment tank 1 from the inlet 11 and is intercepted by the filter screen 2. When the impurities on the filter screen 2 accumulate to a certain extent, they press the third telescopic rod 61 to trigger the touch switch 62 in its rodless cavity, thereby controlling the motor 311 to start.

[0053] Motor 311 drives shaft 312 to rotate, causing filter screen 2 to rotate synchronously. Sleeve 313 and mounting rod 314 mounted on shaft 312 move relative to filter screen 2. Brush bristles 315 clean and collect impurities on filter screen 2. At the same time, shaft 312 rotates to drive first bevel gear 321, which in turn drives second bevel gear 322 to rotate, causing reciprocating screw 323 to rotate. Push plate 324 moves linearly along screw, pushing the collected impurities toward impurity box 4. During the movement of the push plate 324, the control component 33 plays a role. When the push plate 324 moves towards the impurity box 4, it squeezes the first airbag 333, causing the first telescopic rod 332 to extend, the mounting rod 314 to lift, the locking block 336 to enter the locking groove, and the brush bristles 315 to separate from the filter screen 2. When the push plate 324 moves in the opposite direction, it squeezes the second airbag 337, the second telescopic rod 335 to retract, the locking block 336 to disengage, the mounting rod 314 to fall, and the brush bristles 315 to contact the filter screen 2 again for cleaning.

[0054] The rotation of the shaft 312 simultaneously drives the support plate 51 to rotate, causing the scraper 52 to move along the bottom of the pool and push the sludge towards the central sludge tank 53. Inside the tank, the cutting blade 54 shreds the sludge, and the sludge pump 56 transports it to the collection tank 55. The entire device achieves wastewater pretreatment and impurity removal through the coordinated work of its components.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wastewater pretreatment device, characterized in that, include: A pretreatment tank (1) is provided with an inlet (11) on its side wall, a slag outlet on its side wall, a chute on its side wall, and an outlet (12) on its side wall. Filter screen (2), which is slidably installed in the groove of the pretreatment tank (1); Cleaning component (3), which is installed on the pretreatment tank (1), is used to clean solid impurities on the filter screen (2); Impurity box (4), the impurity box (4) is fixedly installed at the slag outlet of the pretreatment tank (1), and the impurity box (4) is connected to the pretreatment tank (1); Sludge scraping assembly (5), the sludge scraping assembly (5) is installed on the pretreatment tank (1), the sludge scraping assembly (5) is used to scrape off the sediment at the bottom of the pretreatment tank (1); The sensor (6) is installed on the pretreatment tank (1) and is used to control the operating status of the cleaning assembly (3) and the sludge scraping assembly (5). The cleaning component (3) includes a cleaning component (31), a pusher (32), and a control component (33). The cleaning component (31) is installed on the pretreatment tank (1) and is used to clean and concentrate the impurities on the filter screen (2). The pusher (32) is installed on the cleaning component (31) and is used to push the impurities concentrated on the cleaning component (31) into the impurity box (4). The control component (33) is used to control the operating status of the pusher (32).

2. The wastewater pretreatment device according to claim 1, characterized in that, The cleaning component (31) includes: The motor (311) is fixedly installed above the pretreatment tank (1) by means of a support frame; A rotating shaft (312) is fixedly connected at one end to the output end of the motor (311) on the same axis. The rotating shaft (312) passes through the filter screen (2) and is keyed to the filter screen (2). Sleeve (313), which is coaxially sleeved and slidably mounted on the rotating shaft (312), with the sliding direction along the axial direction of the rotating shaft (312), and the bottom of the sleeve (313) abutting against the filter screen (2); Mounting rod (314), the mounting rod (314) is arranged radially along the pretreatment tank (1), one end of the mounting rod (314) is slidably mounted on the sleeve (313), and the sliding direction is along the axial direction of the rotating shaft (312); The brush bristles (315) are fixedly installed at the bottom of the mounting rod (314). In the initial state, the brush bristles (315) abut against the upper surface of the filter screen (2).

3. The wastewater pretreatment device according to claim 2, characterized in that, The ejector (32) includes: The first bevel gear (321) is disposed inside the sleeve (313), and the first bevel gear (321) is coaxially disposed on the rotating shaft (312) and keyed to the rotating shaft (312); The second bevel gear (322) is disposed inside the sleeve (313) and meshes with the first bevel gear (321); A reciprocating lead screw (323) is inserted into and rotatably mounted in the mounting rod (314), and one end of the reciprocating lead screw (323) is coaxially fixedly mounted on the second bevel gear (322); Push plate (324) is screw-driven and connected to the reciprocating screw (323). The side of the push plate (324) close to the brush bristles (315) abuts against the brush bristles (315). In the initial state, the bottom end of the push plate (324) abuts against the filter screen (2).

4. The wastewater pretreatment device according to claim 3, characterized in that, The mounting rod (314) has a snap-fit ​​groove at one end near the inner wall of the pretreatment tank (1), and the pretreatment tank (1) has a sliding groove on the inner wall near the mounting rod (314). The control component (33) includes: A sliding frame (331) is slidably mounted on the pretreatment tank (1) and the sliding frame (331) is disposed in a sliding groove and abuts against the upper surface of the filter screen (2); The first telescopic rod (332) has its fixed end fixedly installed on the sliding frame (331) and its movable end fixedly installed on the mounting rod (314). The first airbag (333) is fixedly installed on one end of the mounting rod (314) near the pretreatment pool (1), and the first airbag (333) is connected to the rodless cavity of the first telescopic rod (332). The first spring (334) is vertically disposed in the rod cavity of the first telescopic rod (332); The second telescopic rod (335) is fixedly mounted on the sliding frame (331) at its fixed end. A locking block (336) is fixedly installed on the movable end of the second telescopic rod (335). The locking block (336) is provided with a guide slope and is adapted to the locking groove. The second airbag (337) is fixedly installed on one end of the mounting rod (314) near the sleeve (313), and the second airbag (337) is connected to the rod cavity of the second telescopic rod (335); The second spring (338) is disposed in the rodless cavity of the second telescopic rod (335).

5. The wastewater pretreatment device according to claim 4, characterized in that, The sludge scraping component (5) includes: A support plate (51) is fixedly mounted on the rotating shaft (312) at its center, and the support plate (51) is arranged along the diameter direction of the pretreatment tank (1). Scraper (52), multiple scrapers (52) are spaced apart, all scrapers (52) are fixedly installed and inclined on the support plate (51), and the scraper (52) abuts against the bottom wall of the pretreatment tank (1).

6. The wastewater pretreatment device according to claim 5, characterized in that, The sludge scraping assembly (5) also includes: Sludge tank (53), the sludge tank (53) is fixedly installed at the bottom of the pretreatment tank (1), and the sludge tank (53) is located at the center of the pretreatment tank (1); Cutting blade (54), multiple cutting blades (54) are provided, multiple cutting blades (54) are arranged circumferentially along the rotating shaft (312) and fixedly installed on the rotating shaft (312), and the cutting blades (54) are disposed inside the sludge tank (53); Collection box (55), which is connected to sludge box (53) via a pipe; A sludge pump (56) is installed on the pipeline.

7. The wastewater pretreatment device according to claim 6, characterized in that, The sensing element (6) includes: The third telescopic rod (61) is provided in a circumferentially spaced manner with the axis of the rotating shaft (312) as the center. The fixed end of the third telescopic rod (61) is fixedly installed in the groove of the pretreatment tank (1), and the movable end of the third telescopic rod (61) abuts against the lower surface of the filter screen (2). A touch switch (62) is fixedly installed in the rodless cavity of the third telescopic rod (61), and the touch switch (62) is electrically connected to the motor (311).

8. The wastewater pretreatment device according to claim 1, characterized in that, A pull-out box (41) is slidably installed inside the impurity box (4), and the bottom of the pull-out box (41) is a screen (42).

9. The wastewater pretreatment device according to claim 1, characterized in that, A baffle (7) is fixedly installed at the bottom of the filter screen (2).

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