A wastewater treatment device for garbage trucks

Abstract

This application relates to the field of wastewater treatment, specifically disclosing a wastewater treatment device for a garbage truck, comprising: a truck body, with a sewage tank and a garbage tank located on the inner bottom of the truck body, and a feed door located above the sewage tank on the truck body; a squeezing mechanism located at the feed door for squeezing out sewage from the garbage; a filter conveyor belt located above the sewage tank and the garbage tank for receiving the garbage squeezed by the squeezing mechanism and filtering the garbage, so that the sewage in the garbage falls into the sewage tank and the filtered garbage is transported to the garbage tank; an inner cleaning mechanism for cleaning the inner side of the filter conveyor belt; and an outer cleaning mechanism for cleaning the outer side of the filter conveyor belt. This application enables the garbage truck to perform filter maintenance without shutting down the machine during wastewater pretreatment.

Description

Technical Field

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

[0002] Currently, during the collection and transportation of domestic waste, the water contained in the garbage and the leachate produced by the fermentation of the garbage will accumulate to form high-impurity sewage. This type of sewage is mixed with a large amount of coarse debris such as plastic bags, fibers, sand, and kitchen waste, as well as floating oil and colloidal substances. The solid-liquid separation and pretreatment effect directly determines the efficiency of subsequent wastewater treatment and the stability of equipment operation, and is also a key link in the wastewater treatment of garbage trucks.

[0003] Currently, mechanical filtration separation is the mainstream method for wastewater pretreatment in garbage trucks. Fixed grilles and filters are generally installed in the sewage collection channel or sewage chamber inlet. The grille or filter mesh diameter is mostly 5-10mm. Solid-liquid separation is achieved by intercepting fibrous and particulate impurities in the sewage, preventing impurities from clogging subsequent pipelines and treatment units. Some equipment uses multi-stage fixed filters to further remove fine suspended solids. After filtration, the sewage enters the storage or treatment unit, and the intercepted filter residue relies on manual cleaning periodically. In practical applications, fixed screen filtration and sedimentation filtration are the two most commonly used methods. However, both methods, used alone or in combination, still have significant drawbacks: While fixed screen filtration has a simple structure and direct interception effect, garbage truck sewage contains a large amount of complex impurities. Fibers, plastic bags, and other debris easily entangle and clog the filter screen pores, causing poor water flow. Furthermore, hard sand and gravel can accelerate filter screen wear, requiring frequent shutdowns for manual cleaning, which seriously affects the continuity of operations and results in high maintenance costs. Sedimentation filtration relies on gravity settling to separate impurities. Although it does not require fine filters, the settling time is long and the treatment efficiency is low. It is difficult to match the working conditions of large instantaneous discharge volumes and drastic flow fluctuations of garbage truck sewage. Light floating oil, fibers, and other impurities cannot be removed by sedimentation, and the bottom sludge still needs to be manually cleaned, resulting in limited pretreatment effects.

[0004] In related technologies, filter and screen cleaning methods are mainly divided into two categories: manual cleaning and simple mechanical cleaning. Manual periodic disassembly and cleaning is the most common method, often using drawer-type or snap-on removable filters. When clogged, the machine must be stopped to remove the filters, which are then washed and wiped with high-pressure water guns and brushes. This method is labor-intensive, involves long downtime, and untimely cleaning can exacerbate clogging and reduce treatment efficiency. To reduce reliance on manual labor, some medium and large garbage trucks use simple mechanical scraping or backwashing. Mechanical scraping uses a motor or hydraulically driven fixed scraper and rotating scraper to rub against the filter surface to remove sludge. While this reduces direct manual operation, the scraping structure is simple, only cleaning surface dirt and unable to penetrate deep into the pores to remove fine impurities and tangled fibers. Long-term use can easily scratch the filter surface and shorten its lifespan, still requiring regular manual maintenance. Backwashing uses high-pressure water to flush the high-precision filter pores in the opposite direction, with better sludge removal efficiency than manual scraping. However, it requires a high-pressure water pump and dedicated pipelines, resulting in complex equipment structure, increased energy consumption and manufacturing costs. Furthermore, backwashing interrupts the normal filtration process, affecting the continuity of wastewater treatment.

[0005] In summary, existing wastewater pretreatment devices for garbage trucks generally suffer from problems such as easy clogging of filters, incomplete sludge removal, reliance on manual downtime for maintenance, and poor treatment continuity. Summary of the Invention

[0006] In order to enable garbage trucks to perform filter maintenance without shutting down the machine when pre-treating wastewater, this application provides a wastewater treatment device for garbage trucks.

[0007] The wastewater treatment device for garbage trucks provided in this application adopts the following technical solution: A wastewater treatment device for garbage trucks, comprising: The carriage has a sewage tank and a garbage tank at its inner bottom, and a feed door is located on the carriage and above the sewage tank. The carriage also has other facilities. An extrusion mechanism, located at the feed gate, is used to extrude wastewater from the garbage; and, A filter conveyor belt, positioned above the sewage tank and the garbage tank, is used to receive the garbage after it has been squeezed by the extrusion mechanism and to filter the garbage, causing the wastewater in the garbage to fall into the sewage tank and the filtered garbage to be transported to the garbage tank; and, An inner cleaning mechanism is used to clean the inner side of the filter conveyor belt; and, An outer cleaning mechanism is used to clean the outer side of the filter conveyor belt.

[0008] Optionally, the extrusion mechanism includes: A feed hopper, located at the discharge port of the feed gate, is connected to the carriage; and, A discharge pipe is located at the discharge end of the feed hopper; Multiple pairs of extrusion conveying rollers are rotatably mounted at the discharge end of the feed hopper for extruding and conveying waste.

[0009] Optionally, the filter conveyor belt is installed at an angle inside the carriage, with one end of the filter conveyor belt at a lower position located between the opening of the sewage tank and the discharge pipe, and the other end of the filter conveyor belt at a higher position located at the opening of the garbage tank. The filter conveyor belt is provided with two side limiting plates spaced apart above it, which are used to limit the waste in the middle of the filter conveyor belt.

[0010] Optionally, the filter conveyor belt includes multiple unit filter plates, which are hinged end to end to form the filter conveyor belt; Each of the unit filter plates has a receiving hole in the middle and a comb-tooth grid located in the receiving hole, and the comb handle of the comb-tooth grid is rotatably connected to the unit filter plate.

[0011] Optionally, the unit filter plate is provided with an interceptor plate located on the side of the receiving hole. The interceptor plate is located on the outside of the filter conveyor belt and is arranged along the width direction of the filter conveyor belt.

[0012] Optionally, the comb handle of the comb-tooth grid is hinged to the unit filter plate.

[0013] Optionally, the inner cleaning mechanism is located on the inner side of the filter conveyor belt, and the inner cleaning mechanism includes a roller brush that is rotatably located at the opening of the sewage tank, the roller brush being used to clean the inner side of the filter conveyor belt. The roller brush is provided with a first guide plate and a second guide plate that are inclined upward on both sides, and the roller brush is in contact with the first guide plate or the second guide plate.

[0014] Optionally, the outer cleaning mechanism is disposed between the filter conveyor belt and the waste trough, and the outer cleaning mechanism includes: The rotating rod is rotatably connected to the carriage. A protective tube is coaxially mounted on the rotating rod; the protective tube is provided with the following circumferential features: Multiple sliding tubes, each having one end slidably connected to the protective tube, and the other end sealed by a sealing scraper; the sliding tubes are equipped with: An outer cleaning comb is mounted on the rotating rod, and the sealing scraper is provided with multiple scraping holes that correspond one-to-one with the multiple cleaning comb teeth of the outer cleaning comb; When the sliding tube is close to the rotating rod, it is used to allow the cleaning comb teeth to pass through the corresponding scraping holes and extend outside the sealing scraper. When the sliding tube moves away from the rotating rod, it is used to cause the sealing scraper to scrape off the debris from the multiple cleaning comb teeth.

[0015] Optionally, the outer cleaning mechanism further includes: The ejector roller is located on the inner side of the filter conveyor belt directly above the protective pipe and is rotatably connected to the carriage. The ejector roller has multiple ejector blocks in its circumferential direction. The ejector roller rotates synchronously with the filter conveyor belt, and the ejector blocks are used to push the contacting comb-tooth grid downwards.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, waste is poured into a squeezing mechanism, which squeezes out the wastewater, causing the waste to fall onto a filter conveyor belt. The wastewater passes directly through the filter holes of the conveyor belt under gravity and falls into a wastewater tank. The filter conveyor belt then transports the filtered waste to the opening of the waste tank, where the dehydrated waste falls into the tank under gravity. During the operation of the filter conveyor belt, the inner and outer cleaning mechanisms operate simultaneously. The lower end of the conveyor belt, which does not transport waste, is continuously cleaned. Cleaning the lower end of the conveyor belt does not interfere with the upper part of the belt transporting waste. Furthermore, as the conveyor belt operates, the entire belt is thoroughly cleaned, enabling continuous cleaning and maintenance without stopping the machine. This ensures that the conveyor belt can continuously and effectively filter wastewater from the waste during continuous operation.

[0017] 2. In this application, during the conveying of dewatered waste, the majority of wastewater can directly pass vertically through the conveyor belt and fall into the wastewater tank. Wastewater carried by solid waste gradually flows downwards as the conveyor belt moves upwards, landing on the first or second guide plate. This guide plate then guides the wastewater into the wastewater tank, preventing wastewater carried by solid waste and other wastewater that cannot fall directly into the tank from being conveyed to the wastewater tank by the conveyor belt. Simultaneously, the rotating brush, in conjunction with the wastewater after filtering the solid waste, washes the inside of the conveyor belt, brushing the solid waste into the receiving holes, which then fall into the wastewater tank, preventing the inside of the conveyor belt from being clogged by waste.

[0018] 3. Although the comb-shaped grid in this application can rotate downwards under the influence of gravity, the relatively harsh environment inside the garbage truck means that the comb-shaped grid may get stuck in the garbage. By actively pushing the comb-shaped grid downwards with the ejector roller, even if the comb-shaped grid is stuck in the garbage and cannot rotate downwards under the influence of gravity, the ejector roller can still actively and effectively push the comb-shaped grid downwards, thereby enabling the comb-shaped grid to rotate downwards stably and cooperate effectively with the outer cleaning comb.

[0019] 4. In this application, when the filter conveyor belt continuously transports garbage, the ejector roller rotates synchronously with the filter conveyor belt. During the rotation of the ejector roller, the ejector block inserts into the receiving hole on the contacting unit filter plate, thereby pushing the comb grid outward from the receiving hole. Then, the comb grid will also rotate further downward under the action of gravity. Next, the telescopic component above the rotating rod shortens, bringing the sliding tube closer to the rotating rod, allowing multiple cleaning comb teeth to extend outside the sealing scraper. As the rotating rod rotates, the cleaning comb teeth of the outer cleaning comb insert between the filter comb teeth of the comb grid, combing the garbage off the comb grid. Here, in order to prevent the outer cleaning mechanism from being stuck by garbage and to ensure that the outer cleaning mechanism has stable cleaning efficiency, after the outer cleaning comb has rotated and cleaned the comb grid once, it does not perform a second continuous operation. Instead, it moves to the bottom of the rotating rod as the rotating rod rotates, and the telescopic component extends, allowing the sealing scraper to scrape the garbage on the cleaning comb teeth of the outer cleaning comb into the garbage trough, thus cleaning the outer cleaning comb. As the rotating rod continues to rotate, the cleaned outer cleaning comb cleans the comb grid again. Furthermore, during the rotation of the rotating rod, the outer cleaning comb cleans the comb tooth grid above the rotating rod and achieves self-cleaning through the sealing scraper below the rotating rod. The outer cleaning comb is cleaned once after each use. The rotating rod drives multiple outer cleaning combs to rotate, enabling the outer cleaning mechanism to continuously clean the comb tooth grid and perform self-cleaning, ensuring that the outer cleaning comb can operate stably for a long time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a top view of an embodiment of the present application; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along line AA in the middle; Figure 4 This is a schematic diagram of the internal structure of this application; Figure 5 This is a schematic diagram of a filter conveyor belt consisting of three unit filter plates; Figure 6 This is a schematic diagram of the overall structure of the outer cleaning mechanism; Figure 7 yes Figure 6 A schematic diagram of the overall structure of the middle and outer cleaning mechanism after the protective pipe has been removed; Figure 8yes Figure 7 A schematic diagram of the overall structure of the middle and outer cleaning mechanism after removing part of the sliding tube.

[0022] Figure label: 1. Carriage; 101. Sewage Tank; 102. Garbage Tank; 11. Sewage Discharge Valve; 12. Discharge Door; 13. Feed Door; 14. Feed Hopper; 2. Extrusion Mechanism; 21. Feed Hopper; 22. Discharge Pipe; 23. Extrusion Conveyor Roller; 3. Filter Conveyor Belt; 31. Unit Filter Plate; 3101. Receiving Hole; 311. Interceptor Plate; 312. Comb-shaped Grille; 313. Filter Comb; 32. Side Limiting Plate; 33. Drive Roller; 4. Inner Cleaning Mechanism; 41. First Guide Plate; 42. Second Guide Plate; 43. Roller Brush; 5. Outer Cleaning Mechanism; 50. Ejector Roller; 501. Ejector Block; 51. Rotating Rod; 52. Outer Cleaning Comb; 521. Cleaning Comb; 53. Protective Pipe; 5301. Sliding Hole; 54. Sliding Pipe; 55. Sealing Scraper; 5501. Scraping Hole; 56. Telescopic Part. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0024] This application discloses a wastewater treatment device for garbage trucks.

[0025] Reference Figure 1 , Figure 2 and Figure 3 A wastewater treatment device for garbage trucks, comprising: The carriage 1 has a sewage tank 101 and a garbage tank 102 on its inner bottom. An inlet door 13 is located on the carriage 1 above the sewage tank 101; here, the inlet door 13 can be a conventional electric door. Specifically, the sewage tank 101 is located at the rear of the carriage 1, and the garbage tank 102 is located at the front of the carriage 1. The bottom of the sewage tank 101 is sloping, and a drain valve 11 is located at the lowest point of the bottom of the sewage tank 101. The bottom of the garbage tank 102 is also sloping, and a discharge door 12 is located at the lowest point of the bottom of the garbage tank 102. By separating the sewage tank 101 and the garbage tank 102 within the carriage 1, and cooperating with the sloping bottom structure and the drain valve 11 and discharge door 12, the smooth discharge of sewage and garbage is achieved.

[0026] Reference Figure 1 , Figure 2 and Figure 3The carriage 1 is equipped with a feeding hopper 14 located at the feeding gate 13. The feeding hopper 14 is rotatably connected to the carriage 1 and is driven to rotate in a conventional manner. For example, a hydraulic rod is connected between the feeding hopper 14 and the carriage 1. The feeding hopper 14 is driven to rotate by the extension and retraction of the hydraulic rod, so that the feeding hopper 14 can be loaded with garbage at a lower position. Then, the garbage is guided into the feeding gate 13 by rotation. The feeding hopper 21 can conveniently transport the garbage at the lower position to the feeding gate 13 at the higher position.

[0027] Reference Figure 1 , Figure 2 and Figure 3 The carriage 1 is also equipped with; Reference Figure 1 , Figure 2 and Figure 3 The extrusion mechanism 2 is located at the feed gate 13 and is used to extrude sewage from the waste; and, Reference Figure 1 , Figure 2 and Figure 3 The filter conveyor belt 3 is located above the sewage tank 101 and the garbage tank 102. It receives the garbage after it has been compressed by the compression mechanism 2 and filters the garbage, causing the wastewater in the garbage to fall into the sewage tank 101 and the filtered garbage to be transported to the garbage tank 102. Reference Figure 1 , Figure 2 and Figure 3 The inner cleaning mechanism 4 is used to clean the inner side of the filter conveyor belt 3; and, Reference Figure 1 , Figure 2 and Figure 3 The outer cleaning mechanism 5 is used to clean the outer side of the filter conveyor belt 3.

[0028] Reference Figure 1 , Figure 2 and Figure 3In this embodiment, the feeding hopper 14 is first rotated to its lowest position. After the garbage on the ground (such as the garbage in the ground garbage can) is fed into the feeding hopper 14, the feeding door 13 is opened. The feeding hopper 14 rotates to pour the garbage into the squeezing mechanism 2. The squeezing mechanism 2 squeezes out the sewage in the garbage, so that the garbage falls onto the filter conveyor belt 3. The sewage passes directly through the filter holes of the filter conveyor belt 3 under the action of gravity and falls into the sewage tank 101. Then the filter conveyor belt 3 transports the filtered garbage to the opening of the garbage tank 102, so that the dehydrated garbage falls into the garbage tank 102 under the action of gravity. During the operation of the filter conveyor belt 3, the inner cleaning mechanism 4 and the outer cleaning mechanism 5 also operate synchronously. The lower end of the filter conveyor belt, which does not transport garbage, is continuously cleaned. Cleaning the lower end of the filter conveyor belt 3 does not interfere with the upper part of the filter conveyor belt 3 transporting garbage. As the filter conveyor belt 3 operates, the entire filter conveyor belt 3 can be cleaned thoroughly, realizing non-stop cleaning and maintenance of the filter conveyor belt 3. This ensures that the filter conveyor belt 3 can continuously, effectively, and efficiently filter sewage from garbage during continuous operation.

[0029] Reference Figure 4 and Figure 5 The extrusion mechanism 2 includes: Reference Figure 4 and Figure 5 The feed hopper 21 is located at the discharge port of the feed gate 13 and is connected to the carriage 1; and, Reference Figure 4 and Figure 5 Multiple pairs of extrusion conveyor rollers 23 are rotatably mounted at the discharge end of the feed hopper 21 for extruding and conveying waste. Specifically, the discharge port of the feed hopper 21 is provided with a discharge pipe 22 pointing towards the filter conveyor belt 3. Multiple pairs of extrusion conveyor rollers 23 are rotatably mounted inside the discharge pipe 22. The multiple pairs of extrusion conveyor rollers 23 are distributed along the length of the discharge pipe 22. The extrusion conveyor rollers 23 can be driven by a conventional waterproof motor. Here, the surface of the extrusion conveyor rollers 23 is provided with anti-slip texture to prevent the waste from slipping between the waste and the extrusion conveyor rollers 23, ensuring smooth waste conveying. After the waste enters the feed hopper 21, the extrusion conveyor rollers 23 squeeze out the sewage in the waste while conveying the waste.

[0030] Reference Figure 4 and Figure 5 In this embodiment, the waste in the feed hopper 21 enters the discharge pipe 22 under the action of gravity. Multiple pairs of extrusion conveyor rollers 23 extrude and convey the waste towards the filter conveyor belt 3, squeezing out the sewage from the waste, dehydrating the waste, and then dropping it onto the filter conveyor belt 3 from the discharge end of the discharge pipe 22.

[0031] Reference Figure 4 , Figure 5 and Figure 6The filter conveyor belt 3 is installed at an angle inside the carriage 1. The lower end of the filter conveyor belt 3 is located between the opening of the sewage tank 101 and the discharge pipe 22, and the higher end of the filter conveyor belt 3 is located at the opening of the garbage tank 102. The filter conveyor belt 3 is installed at an angle, which can gradually guide the sewage carried by the solid garbage during the garbage transportation process, so that the sewage is guided to the sewage tank 101 and the sewage is less likely to enter the garbage tank 102. Reference Figure 4 , Figure 5 and Figure 6 Two side limiting plates 32 are provided at intervals above the filter conveyor belt 3. Both side limiting plates 32 are installed on the inner wall of the compartment 1. The two side limiting plates 32 are used to limit the garbage in the middle of the filter conveyor belt 3.

[0032] Reference Figure 4 , Figure 5 and Figure 6 The filter conveyor belt 3 includes multiple unit filter plates 31, which are hinged together end to end to form the filter conveyor belt 3. Specifically, the multiple unit filter plates 31 are hinged together end to end to form the annular body of the filter conveyor belt 3. The filter conveyor belt 3 is provided with a prismatic drive roller 33 for driving the operation of the filter conveyor belt 3. The prismatic drive roller 33 can be driven by a conventional waterproof motor. Each unit filter plate 31 has a slider at both ends, and the filter conveyor belt 3 has annular slide rails on both sides. The sliders are located in adjacent annular slide rails. The annular track of the filter conveyor belt 3 is limited by the cooperation of the annular slide rails and the sliders. Reference Figure 4 , Figure 5 and Figure 6 Each unit filter plate 31 has a receiving hole 3101 in the middle and a comb-shaped grid 312 located in the receiving hole 3101. The comb handle of the comb-shaped grid 312 is rotatably connected to the unit filter plate 31. Specifically, the comb handle of the comb-shaped grid 312 is hinged to the unit filter plate 31. A rotation limiting plate located in the filter conveyor belt 3 is installed on the unit filter plate 31. The rotation limiting plate is used to restrict the comb-shaped grid 312 from rotating into the filter conveyor belt 3. During the operation of the filter conveyor belt 3, the comb-shaped grid 312 on the lower end of the filter conveyor belt 3 can rotate downward under the action of gravity, thereby cooperating with the outer cleaning mechanism 5 to clean the comb-shaped grid 312. The comb-shaped grid 312 on the upper end of the filter conveyor belt 3 can also rotate downward and reset under the action of gravity.

[0033] Reference Figure 4 , Figure 5 and Figure 6The unit filter plate 31 is provided with an interceptor plate 311 located on the side of the receiving hole 3101. The interceptor plate 311 is located on the outside of the filter conveyor belt 3 and is arranged along the width direction of the filter conveyor belt 3. Specifically, the interceptor plate 311 makes it difficult for the waste to slide downward when the filter conveyor belt 3 conveys the waste upward.

[0034] Reference Figure 4 and Figure 5 The inner cleaning mechanism 4 is located on the inner side of the filter conveyor belt 3. The inner cleaning mechanism 4 includes a roller brush 43 that is rotatably located at the opening of the sewage tank 101. The roller brush 43 is used to clean the inner side of the filter conveyor belt 3. Here, the roller brush 43 can be driven by a conventional waterproof motor. Reference Figure 4 and Figure 5 The roller brush 43 has an upwardly inclined first guide plate 41 and a second guide plate 42 on both sides, and the roller brush 43 is in contact with the first guide plate 41 or the second guide plate 42. Specifically, the first guide plate 41 and the second guide plate 42 are both U-shaped plates and are installed on the inner wall of the carriage 1.

[0035] Reference Figure 4 and Figure 5 In this embodiment, although the dehydrated waste and the wastewater squeezed out of the waste fall simultaneously from the discharge port of the discharge pipe 22 onto the upper end of the filter conveyor belt 3 at the opening of the wastewater tank 101, the filter conveyor belt 3 needs time to filter the wastewater, and some wastewater is also carried in the dehydrated waste, which prolongs the time for separating wastewater from the dehydrated waste. During the process of conveying the dehydrated waste, most of the wastewater can directly pass vertically through the filter conveyor belt 3 and fall into the wastewater tank 101. The wastewater carried by the solid waste gradually flows downward during the upward transport of the filter conveyor belt 3 and falls onto the first guide plate 41 or the second guide plate 42. It is then guided into the wastewater tank 101 through the first guide plate 41 or the second guide plate 42, so that the wastewater carried by the solid waste and other wastewater that cannot fall directly into the wastewater tank 101 in time are not easily transported to the waste tank 102 by the filter conveyor belt 3. At the same time, the roller brush 43 rotates and, together with the sewage after filtering solid waste, brushes the inner side of the filter conveyor belt 3, brushing the solid dirt on the inner side of the filter conveyor belt 3 into the receiving hole 3101, and then through the receiving hole 3101 into the sewage tank 101, so that the inner side of the filter conveyor belt 3 is not easily blocked by garbage.

[0036] Reference Figure 6 , Figure 7 and Figure 8 The outer cleaning mechanism 5 is located between the filter conveyor belt 3 and the garbage trough 102. The outer cleaning mechanism 5 includes: Reference Figure 6 , Figure 7 and Figure 8Rotating rod 51 is rotatably connected to carriage 1; Reference Figure 6 , Figure 7 and Figure 8 The protective tube 53 is coaxially mounted on the rotating rod 51, and both ends are sealed to the rotating rod 51. Specifically, the protective tube 53 and the rotating rod 51 together form a sealed annular cavity. Reference Figure 6 , Figure 7 and Figure 8 Multiple sliding tubes 54 are distributed at intervals along the circumference of the protective tube 53. The sliding tubes 54 are arranged along the radial direction of the protective tube 53. In the radial direction of the protective tube 53, each of the multiple sliding tubes 54 is slidably connected and dynamically sealed to the protective tube 53 at one end, and the other end is sealed by the sealing scraper 55. Specifically, the protective tube 53 is provided with radially arranged sliding holes, and the sliding tube 54 is slidably disposed in the sliding holes. A telescopic component 56 is connected between the sliding tube 54 and the rotating rod 51. The telescopic component 56 drives the sliding tube 54 to slide in the radial direction of the protective tube 53 (that is, in the sliding holes). The sliding tube 54 can be dynamically sealed to the tube wall of the protective tube 53 using a conventional dynamic sealing structure. The telescopic component 56 can be a conventional telescopic component such as an electric telescopic rod. The telescopic component 56 is disposed inside the protective tube 53 to prevent garbage from affecting the operation of the telescopic component 56. The part where the sliding tube 54 and the rotating rod 51 are slidably connected is protected by the protective tube 53, which also makes it difficult for garbage to jam the sliding tube 54, ensuring that the sliding tube 54 can slide smoothly on the protective tube 53. Reference Figure 6 , Figure 7 and Figure 8 The sliding tube 54 is equipped with; Reference Figure 6 , Figure 7 and Figure 8 An outer cleaning comb 52 is mounted on a rotating rod 51, and its cleaning teeth 521 are located outside the protective tube 53. By rotating the rotating rod 51, the outer cleaning comb 52 combs down the debris from the downward-rotating comb mesh 312. Specifically, the end of the cleaning teeth 521 away from the rotating rod 51 has a blade. When the comb mesh 312 hangs down under gravity, it is in a swinging state, and may experience positional deviation due to debris residue. By providing a blade at the end of the cleaning teeth 521 away from the rotating rod 51, the blade can guide the comb mesh 312 when there is a misalignment between it and the cleaning teeth 521. First, the relatively thin blade is inserted into the gap between the filter teeth 313 of the comb mesh 312. Then, guided by the blade, the cleaning teeth 521 can further penetrate into the gap of the comb mesh 312. Reference Figure 6 , Figure 7 and Figure 8A sealing scraper 55 is installed at the end of the sliding tube 54 away from the rotating rod 51. The sealing scraper 55 has multiple scraping holes 5501 that correspond one-to-one with the multiple cleaning comb teeth 521 of the outer cleaning comb 52. The cleaning comb teeth 521 are located in the corresponding scraping holes 5501. Specifically, the scraping holes 5501 are dynamically sealed to the cleaning comb teeth 521 through a conventional dynamic sealing structure. When the distance between the sliding tube 54 and the rotating rod 51 is at its maximum when the telescopic member 56 drives it, the end of the cleaning comb teeth 521 away from the rotating rod 51 should be flush with the outer end face of the sealing scraper 55. This allows the scraping holes 5501 to scrape the debris off the cleaning comb teeth 521 while preventing debris from easily entering the scraping holes 5501. At the same time, the sealing scraper 55 is also sealed to the end of the sliding tube 54 away from the rotating rod 51, further preventing debris from easily entering the inner hole of the sliding tube 54 and ensuring that the sliding tube 54 can slide smoothly on the outer cleaning comb 52. Here, the end of the cleaning comb 521 away from the rotating rod 51 should be flush with the outer end face of the sealing scraper 55, and the blade should be located outside the scraping hole 5501 to avoid affecting the sealing between the cleaning comb 521 and the scraping hole 5501 due to the reduction in the diameter of the blade. Reference Figure 6 , Figure 7 and Figure 8 When the sliding tube 54 is close to the rotating rod 51, it is used to extend multiple cleaning comb teeth 521 outside the sealing scraper 55; Reference Figure 6 , Figure 7 and Figure 8 When the sliding tube 54 moves away from the rotating rod 51, it is used to cause the sealing scraper 55 to scrape off the debris on the multiple cleaning comb teeth 521.

[0037] Reference Figure 6 , Figure 7 and Figure 8 The outer cleaning mechanism 5 also includes: Reference Figure 6 , Figure 7 and Figure 8The ejector roller 50 is located inside the filter conveyor belt 3 directly above the protective pipe 53 and is rotatably connected to the truck body 1. Multiple ejector blocks 501 are evenly spaced around the circumference of the ejector roller 50. The ejector roller 50 rotates synchronously with the filter conveyor belt 3, and the ejector blocks 501 are used to push the contacting comb grid 312 downwards. The ejector roller 50 is driven by a conventional waterproof motor. Specifically, although the comb grid 312 can rotate downwards under gravity, the relatively harsh environment inside the garbage truck can cause it to become stuck in garbage. The ejector roller 50 actively pushes the comb grid 312 downwards. Even if the comb grid 312 is stuck in garbage and cannot rotate downwards under gravity, the ejector roller 50 can still actively and effectively push it downwards, allowing the comb grid 312 to rotate stably downwards and effectively cooperate with the outer cleaning comb 52.

[0038] Reference Figure 6 , Figure 7 and Figure 8 In this embodiment of the application, when the filter conveyor belt 3 is continuously transporting garbage, the ejector roller 50 rotates synchronously with the filter conveyor belt 3. During the rotation of the ejector roller 50, the ejector block 501 is inserted into the receiving hole 3101 on the contacting unit filter plate 31, thereby pushing the comb grid 312 out of the receiving hole 3101. Then, the comb grid 312 will also rotate further downward under the action of gravity.

[0039] Reference Figure 6 , Figure 7 and Figure 8 Then the telescopic component 56 above the rotating rod 51 shortens, bringing the sliding tube 54 closer to the rotating rod 51, causing multiple cleaning comb teeth 521 to extend outside the sealing scraper 55, providing a stable base for the subsequent insertion of the cleaning comb teeth 521 of the outer cleaning comb 52 into the comb tooth grid 312.

[0040] Reference Figure 6 , Figure 7 and Figure 8As the rotating rod 51 rotates, the cleaning teeth 521 of the outer cleaning comb 52 insert between the filter teeth 313 of the comb grid 312, combing off the debris on the comb grid 312. To prevent the outer cleaning mechanism 5 from getting stuck with debris and to ensure stable cleaning efficiency, the outer cleaning comb 52 does not perform a second continuous operation after cleaning the comb grid 312 once. Instead, it moves to the bottom of the rotating rod 51 as the rod rotates, and then the telescopic member 56 extends, causing the sealing scraper 55 to scrape the debris on the cleaning teeth 521 of the outer cleaning comb 52 into the debris trough 102, thus cleaning the outer cleaning comb 52. As the rotating rod 51 continues to rotate, the cleaned outer cleaning comb 52 cleans the comb grid 312 again. Furthermore, during the rotation of the rotating rod 51, the outer cleaning comb 52 cleans the comb teeth 521 grid 312 above the rotating rod 51, and achieves self-cleaning below the rotating rod 51 through the sealing scraper 55. The outer cleaning comb 52 cleans once per use. The rotating rod 51 drives multiple outer cleaning combs 52 to rotate, enabling the outer cleaning mechanism 5 to continuously clean the comb teeth grid 312 and perform self-cleaning, ensuring that the outer cleaning comb 52 can operate stably for a long time.

[0041] The implementation principle of a wastewater treatment device for garbage trucks according to an embodiment of this application is as follows: First, the garbage is loaded at a low position through the feeding hopper 14. The feeding hopper 14 rotates and sends the garbage through the feeding gate 13 into the extrusion mechanism 2 inside the carriage 1. After the garbage enters the feeding hopper 21, it is squeezed and conveyed forward by multiple pairs of extrusion conveying rollers 23 in the discharge pipe 22. During the conveying process, the garbage is initially dehydrated and the sewage carried in the garbage is squeezed out.

[0042] The compressed waste falls onto the upper surface of the inclined filter conveyor belt 3. Driven by the prismatic drive roller 33, the filter conveyor belt 3 circulates, transporting the waste from the sewage tank 101 side to the waste tank 102 side. During the filtration process, the sewage in the waste falls through the grid holes of the comb-shaped grid 312. Part of it falls directly into the sewage tank 101, while the other part gradually seeps out as the waste is transported upwards. It is then received by the first guide plate 41 and the second guide plate 42 and guided to the sewage tank 101. After the sewage accumulates in the sewage tank 101, it is discharged through the drain valve 11.

[0043] When the comb grid 312, which is stuck with garbage, moves from the filter conveyor belt 3 to the lower part of the belt body, the comb grid 312 rotates downward around the hinge point under its own gravity, providing a working condition for the subsequent cleaning of the comb grid 312 by the outer cleaning comb 52. If the garbage is stuck in the comb grid 312, preventing the comb grid 312 from rotating downward effectively, when the comb grid 312 moves directly above the rotating rod 51, the ejector roller 50 can also forcefully insert into the receiving hole 3101 through the ejector block 501, thereby forcibly ejecting the comb grid 312 out of the receiving hole 3101, providing a working condition for the comb grid 312 to be cleaned by the outer cleaning comb 52.

[0044] Next, the sliding tube 54 above the rotating rod 51 is activated. The sliding tube 54 sucks up the filter teeth 313 used to adsorb the comb grille 312. By sucking up the filter teeth 313 of the comb grille 312, the relative position of the comb grille 312 and the outer cleaning comb 52 can be limited, and the comb grille 312 is less likely to jump. This provides a stable base for the subsequent insertion of the cleaning teeth 521 of the outer cleaning comb 52 into the comb grille 312. Then, the telescopic member 56 shortens, bringing the sliding tube 54 closer to the rotating rod 51, so that multiple cleaning teeth 521 extend outside the sealing scraper 55. At the same time, the comb grille 312 rotates downward and is sucked up.

[0045] As the rotating rod 51 rotates, the cleaning teeth 521 of the outer cleaning comb 52 insert between the filter teeth 313 of the comb grid 312, combing off the debris on the comb grid 312. To prevent the outer cleaning mechanism 5 from getting stuck with debris and to ensure stable cleaning efficiency, the outer cleaning comb 52 does not perform a second continuous operation after cleaning the comb grid 312 once. Instead, it moves to the bottom of the rotating rod 51 as the rod rotates, then the sliding tube 54 is de-energized, and the telescopic component 56 extends, causing the sealing scraper 55 to scrape the debris on the cleaning teeth 521 of the outer cleaning comb 52 into the debris trough 102, thus cleaning the outer cleaning comb 52. As the rotating rod 51 continues to rotate, the cleaned outer cleaning comb 52 cleans the comb grid 312 again. Furthermore, during the rotation of the rotating rod 51, the outer cleaning comb 52 cleans the comb teeth 521 grid 312 above the rotating rod 51, and achieves self-cleaning below the rotating rod 51 through the sealing scraper 55. The outer cleaning comb 52 cleans once per use. The rotating rod 51 drives multiple outer cleaning combs 52 to rotate, enabling the outer cleaning mechanism 5 to continuously clean the comb teeth grid 312 and perform self-cleaning, ensuring that the outer cleaning comb 52 can operate stably for a long time.

[0046] At the same time, the roller brush 43 rotates and, together with the sewage after filtering solid waste, brushes the inner side of the filter conveyor belt 3, brushing the solid dirt on the inner side of the filter conveyor belt 3 into the receiving hole 3101, and then through the receiving hole 3101 into the sewage tank 101, so that the inner side of the filter conveyor belt 3 is not easily blocked by garbage.

[0047] During the process of conveying dewatered waste, most of the wastewater can pass vertically through the filter conveyor belt 3 and fall into the wastewater tank 101. The wastewater carried by the solid waste gradually flows downward as the filter conveyor belt 3 is transported upward and falls onto the first guide plate 41 or the second guide plate 42. It is then guided into the wastewater tank 101 through the first guide plate 41 or the second guide plate 42, so that the wastewater carried by the solid waste and other wastewater that cannot fall directly into the wastewater tank 101 are not easily transported to the waste tank 102 by the filter conveyor belt 3.

[0048] Although the dehydrated waste and the wastewater squeezed out of the waste fall simultaneously from the discharge port of the discharge pipe 22 onto the upper part of the filter conveyor belt 3 at the opening of the wastewater tank 101, the filter conveyor belt 3 needs time to filter the wastewater, and some wastewater is also carried in the dehydrated waste, prolonging the time for separating wastewater from dehydrated waste. During the process of conveying dehydrated waste, most of the wastewater can directly pass vertically through the filter conveyor belt 3 and fall into the wastewater tank 101. The wastewater carried by the solid waste gradually flows downward as the filter conveyor belt 3 is transported upward and falls onto the first guide plate 41 or the second guide plate 42. It is then guided into the wastewater tank 101 through the first guide plate 41 or the second guide plate 42, making it difficult for the wastewater carried by the solid waste and other wastewater that cannot fall directly into the wastewater tank 101 to be transported into the waste tank 102 by the filter conveyor belt 3. At the same time, the roller brush 43 rotates and, together with the sewage after filtering solid waste, brushes the inner side of the filter conveyor belt 3, brushing the solid dirt on the inner side of the filter conveyor belt 3 into the receiving hole 3101, and then through the receiving hole 3101 into the sewage tank 101, so that the inner side of the filter conveyor belt 3 is not easily blocked by garbage.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above are all optional 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 treatment device for garbage trucks, characterized in that: include: The carriage (1) has a sewage tank (101) and a garbage tank (102) at its bottom. The feed door (13) is located on the carriage (1) and above the sewage tank (101). The carriage (1) also has a; An extrusion mechanism (2) is provided at the feed gate (13) and is used to extrude sewage from the waste; and, A filter conveyor belt (3) is disposed above the sewage tank (101) and the garbage tank (102) to receive the garbage squeezed by the squeezing mechanism (2) and to filter the garbage, so that the sewage in the garbage falls into the sewage tank (101) and the filtered garbage is transported to the garbage tank (102); and, An inner cleaning mechanism (4) is used to clean the inner side of the filter conveyor belt (3); and, An outer cleaning mechanism (5) is used to clean the outer side of the filter conveyor belt (3).

2. The wastewater treatment device for garbage trucks according to claim 1, characterized in that: The extrusion mechanism (2) includes: A feed hopper (21) is located at the discharge port of the feed gate (13) and is connected to the carriage (1); and, Multiple pairs of extrusion conveying rollers (23) are rotatably disposed at the discharge end of the feed hopper (21) for extruding and conveying waste.

3. A wastewater treatment device for garbage trucks according to claim 2, characterized in that: The filter conveyor belt (3) is installed at an angle inside the carriage (1). One end of the filter conveyor belt (3) at a lower position is located between the opening of the sewage tank (101) and the discharge pipe (22), and the other end of the filter conveyor belt (3) at a higher position is located at the opening of the garbage tank (102). Two side limiting plates (32) are provided at intervals above the filter conveyor belt (3), and the two side limiting plates (32) are used to limit the garbage in the middle of the filter conveyor belt (3).

4. A wastewater treatment device for garbage trucks according to claim 3, characterized in that: The filter conveyor belt (3) includes multiple unit filter plates (31), which are hinged together end to end to form the filter conveyor belt (3). Each of the unit filter plates (31) has a receiving hole (3101) in the middle and a comb grid (312) located in the receiving hole (3101), and the comb handle of the comb grid (312) is rotatably connected to the unit filter plate (31).

5. A wastewater treatment device for garbage trucks according to claim 4, characterized in that: The unit filter plate (31) is provided with an interceptor plate (311) located on the side of the receiving hole (3101). The interceptor plate (311) is located on the outside of the filter conveyor belt (3) and is arranged along the width direction of the filter conveyor belt (3).

6. A wastewater treatment device for garbage trucks according to claim 4, characterized in that: The comb handle of the comb-tooth grid (312) is hinged to the unit filter plate (31).

7. A wastewater treatment device for garbage trucks according to claim 4, characterized in that: The inner cleaning mechanism (4) is located on the inner side of the filter conveyor belt (3). The inner cleaning mechanism (4) includes a rotating brush (43) located at the opening of the sewage tank (101). The brush (43) is used to clean the inner side of the filter conveyor belt (3). The roller brush (43) has an upwardly inclined first guide plate (41) and a second guide plate (42) on both sides, and the roller brush (43) is in contact with the first guide plate (41) or the second guide plate (42).

8. A wastewater treatment device for a garbage truck according to claim 7, characterized in that: The outer cleaning mechanism (5) is located between the filter conveyor belt (3) and the garbage trough (102), and the outer cleaning mechanism (5) includes: The rotating rod (51) is rotatably connected to the carriage (1); A protective tube (53) is coaxially mounted on the rotating rod (51); the protective tube (53) is provided with the following circumferential orientation: Multiple sliding tubes (54) are slidably connected at one end to the protective tube (53), and their other ends are sealed by a sealing scraper (55); the sliding tubes (54) are provided with: An outer cleaning comb (52) is installed on the rotating rod (51), and the sealing scraper (55) is provided with multiple scraping holes (5501) that correspond one-to-one with the multiple cleaning comb teeth (521) of the outer cleaning comb (52). When the sliding tube (54) is close to the rotating rod (51), it is used to allow the cleaning comb teeth (521) to extend through the corresponding scraping hole (5501) to the outside of the sealing scraper (55); When the sliding tube (54) moves away from the rotating rod (51), it is used to cause the sealing scraper (55) to scrape off the debris on the plurality of cleaning comb teeth (521).

9. A wastewater treatment device for a garbage truck according to claim 8, characterized in that: The outer cleaning mechanism (5) also includes: The ejector roller (50) is located inside the filter conveyor belt (3) directly above the protective pipe (53) and is rotatably connected to the carriage (1). The ejector roller (50) has multiple ejector blocks (501) in the circumferential direction. The ejector roller (50) rotates synchronously with the filter conveyor belt (3), and the ejector blocks (501) are used to eject the contacting comb grid (312) downwards.

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