Internal circulation filtering assembly and outdoor cleaning vehicle

Abstract

The invention relates to the technical field of sewage recovery, and discloses an internal circulation filter assembly and an outdoor cleaning vehicle, the internal circulation filter assembly comprises a separation mechanism and an oil removal mechanism, the separation mechanism comprises a first guide pipe and a drainage pipe provided with an input end and an output end, the first catheter is arranged at the bottom of the drainage tube and located between the input end and the output end of the drainage tube. The oil removal mechanism comprises a second guide pipe, an aeration pipe and a conveying pipe; and the second guide pipe is arranged at the top of the drainage pipe and is parallel to the first guide pipe. According to the internal circulation filtering assembly and the outdoor cleaning vehicle, through cooperative arrangement of the drainage pipe and the first guide pipes, after collected waste water enters the drainage pipe, the waste water flows into the first guide pipes below until the drainage pipe and the first guide pipes are filled with the waste water, and heavy impurities can directly precipitate downwards along the first guide pipes; and grease impurities in the wastewater float upwards due to low density and then enter the second guide pipe through the liquid outlet.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage recovery, and in particular to an internal circulation filter component and an outdoor cleaning vehicle. Background Art

[0002] In modern society, outdoor cleaning operations such as road cleaning, square cleaning, and large equipment cleaning are increasing. Outdoor cleaning vehicles, as efficient cleaning equipment, have been widely used. With the acceleration of urbanization, the cleaning and maintenance of central road guardrails have become an important part of urban sanitation work. During the guardrail cleaning process, outdoor cleaning vehicles, as the main operating equipment, will produce a large amount of grease-carrying sewage. These greases mainly come from oil dripping from passing vehicles and lubricating oil leakage. After adhering to the surface of the guardrail, they are washed and flushed into the sewage.

[0003] Currently, outdoor cleaning vehicles used for guardrail cleaning will recycle the dripping sewage after spraying water for cleaning, and then filter the recycled sewage. However, using simple filtering devices to treat sewage cannot effectively separate the grease in the sewage. Most mainstream equipment uses simple filtering devices with mechanical filters as the core, which can only remove solid impurities such as sand, gravel, and dust through physical interception. However, there is a lack of effective separation methods for emulsified and suspended grease pollutants formed by vehicle oil and lubricating oil leakage during the cleaning process. Therefore, the oil content of the treated sewage often exceeds the standard. If the grease pollutants are put into cleaning again without treatment, the grease in the cleaning water will combine with dust and adhere to the guardrail or drip on the ground to form oil marks, thereby affecting the cleaning effect. When directly discharged, the grease will not only pollute the soil and water sources, but also easily solidify in the sewer, causing pipe blockage and increasing the maintenance cost of the urban drainage system. This not only causes a waste of water resources, but also poses a risk of soil and water pollution due to the direct discharge of oily sewage. Summary of the Invention

[0004] The present invention provides an internal circulation filtering component and an outdoor cleaning vehicle, which can separate grease from wastewater generated after cleaning, avoid affecting the cleaning effect and reduce the risk of soil and water bodies being polluted by the discharge of cleaning wastewater.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: Design an internal circulation filter assembly and outdoor cleaning vehicle, including a separation mechanism and an oil removal mechanism, wherein: The separation mechanism includes a first conduit and a drainage tube with an input end and an output end, wherein the first conduit is arranged at the bottom of the drainage tube and is located between the input end and the output end of the drainage tube; The oil removal mechanism includes a second conduit, an aeration pipe, and a delivery pipe. The second conduit is arranged on the top of the drainage pipe and is parallel to the first conduit. The surface of the drainage pipe is provided with drainage ports corresponding to the second conduit and the first conduit, respectively, so that the first conduit and the second conduit are both connected to the drainage pipe. The aeration pipe is arranged on the outer wall of the second conduit and the output end is communicated with the second conduit, and is used to aerate the second conduit. The delivery pipe is arranged above the second conduit and the input end is communicated with the second conduit. The device further comprises a trigger mechanism, which is used to discharge the liquid in the drainage tube when the water level in the second conduit reaches a trigger condition.

[0006] Optionally, a collection mechanism is also included, which includes a side guard plate, a collection tray, a positioning sleeve and a filter screen. The collection tray is fixedly installed on the inner side of the bottom of the side guard plate, the positioning sleeve is fixedly installed on the inner bottom wall of the collection tray, and the filter screen is fixedly installed on the inner side wall of the collection tray and is located on the outside of the positioning sleeve.

[0007] Optionally, a guide mechanism is provided at the bottom of the collecting tray, and the guide mechanism includes a guide hole and a guide tube. The guide hole is opened in the middle of the bottom of the collecting tray, and one end of the guide tube is plugged into the inner wall of the guide hole.

[0008] Optionally, a water pump is fixedly mounted on the outer surface of the side guard plate, and the input end of the water pump is plugged into the other end of the guide tube.

[0009] Optionally, the separation mechanism also includes a connector, a mesh plate, a collection box, a drain pipe and a sealing cover, one end of the connector is plugged into the end of the drainage pipe, and the other end of the connector is connected to the output end of the water pump through a pipe, and multiple mesh plates are respectively fixedly installed in multiple interfaces on the top of the collection box, and the interfaces on the top of the collection box are respectively threadedly connected to the bottom ends of multiple first conduits, the drain pipe is plugged and fixed to the bottom of the collection box, and the sealing cover is threadedly connected to the outer wall of the drain pipe.

[0010] Optionally, the oil removal mechanism also includes an air inlet pipe, an exhaust pipe and an air guide pipe, and multiple air inlet pipes are respectively opened on the outer wall of the second conduit, the outer surface of the air inlet pipe is connected to multiple joints of the aeration pipe, the exhaust pipe is inserted into the top of the conveying pipe, and one end of the air guide pipe is sleeved on the outer surface of the exhaust pipe.

[0011] Optionally, the oil removal mechanism also includes an oil drain pipe, a motor, a screw rod and an oil storage tank. The oil drain pipe is plugged into the bottom of the delivery pipe, the motor is fixedly installed at the end of the delivery pipe, the screw rod is rotatably connected to the inner wall of the delivery pipe, the output end of the motor is transmission-connected to the end of the screw rod through a key, and the oil storage tank is threadedly connected to the end of the oil drain pipe.

[0012] Optionally, the trigger mechanism includes a pressure relief valve connected to the end of the drainage pipe by bolts, the other end of the pressure relief valve is connected to a filter mechanism by bolts, and the output end of the filter mechanism is plugged with a water outlet pipe.

[0013] The filter element is arranged on the inner wall of the filter element, and the filter element is connected with the filter element at the top of the filter element.

[0014] An outdoor cleaning vehicle comprises a cleaning vehicle body, a cleaning component and an internal circulation filter component as described in any one of claims 1 to 9, wherein the cleaning component is arranged on the cleaning vehicle body, and the internal circulation filter component is arranged in the cleaning vehicle body and located on the outside of the cleaning component, and is used to filter the sewage input by the cleaning vehicle body.

[0015] The present invention provides an internal circulation filter assembly and an outdoor cleaning vehicle, which have the following beneficial effects: The internal circulation filter component and the outdoor cleaning vehicle input the liquid to be filtered (i.e., wastewater or sewage) through the input end of the drainage pipe. After the filtered liquid enters the drainage pipe, it enters the first conduit through the drainage port corresponding to the first conduit until the first conduit is filled. The liquid in the first conduit is precipitated. After the first conduit is filled, the liquid fills the drainage pipe again. After the liquid fills the drainage pipe, it flows into the second conduit through the drainage port corresponding to the second conduit. Grease and oil impurities also flow into the second conduit. Through the continuous input of liquid, when the new liquid entering the drainage pipe passes through the drainage port corresponding to the first conduit, the heavier impurities will be precipitated downward into the first conduit. When passing through the drainage port corresponding to the second conduit, the grease and oil impurities will float upward due to their lower density and enter the second conduit. At this time, preliminary separation work is carried out. Through the setting of the aeration pipe, its output The end can aerate the second conduit from the outside of the second conduit. The aeration will generate tiny bubbles in the liquid. The tiny bubbles float in the liquid, adhere to the grease and oil impurities in the liquid and continue to float, forming a scum layer on the liquid level of the second conduit until the liquid overflows into the delivery pipe. The scum layer liquid then enters the delivery pipe. The scum layer can be transported and guided through the delivery pipe until a certain amount of liquid overflows into the delivery pipe. The trigger mechanism discharges the liquid in the drainage pipe, thereby realizing separation and filtration of wastewater and grease, avoiding that the grease in the cleaning water will combine with dust and adhere to the guardrail or drip on the ground to form oil stains when it is put into cleaning again, thereby avoiding affecting the cleaning effect, and avoiding clogging of the pipeline after discharge, which increases the maintenance cost of the urban drainage system, and the risk of soil and water pollution caused by the direct discharge of oily wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall installation structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the separation mechanism and the oil removal mechanism of the present invention; Figure 3 This is a schematic diagram of the explosion structure of the separation mechanism and the oil removal mechanism of the present invention; Figure 4 This is a schematic diagram of the explosion structure of the delivery pipe of the present invention; Figure 5 This is a schematic diagram of the installation structure of the filter mechanism of the present invention; Figure 6 It is a schematic diagram of the collection mechanism structure of the present invention.

[0017] Figure: 1. Cleaning assembly; 2. Collection mechanism; 201. Side guard plate; 202. Collection tray; 203. Positioning sleeve; 204. Filter; 3. Guide mechanism; 301. Diversion hole; 302. Guide pipe; 4. Water pump; 5. Separation mechanism; 501. Connector; 502. Drain pipe; 503. Drain port; 504. First conduit; 505. Mesh plate; 506. Collection box; 507. Drain pipe; 508. Sealing cover; 6. Oil removal mechanism; 601. Second conduit; 602 , air inlet pipe; 603, aeration pipe; 604, delivery pipe; 605, oil drain pipe; 606, oil storage tank; 607, motor; 608, screw rod; 609, exhaust pipe; 6010, air guide pipe; 7, pressure relief valve; 8, filtering mechanism; 801, tee pipe; 802, waste box; 803, protective shell; 804, filter element; 805, connecting pipe; 806, return pipe; 807, one-way valve; 808, solenoid valve; 809, fixing seat; 8010, positioning pipe; 9, water outlet pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work shall fall within the scope of protection of the present invention.

[0019] See also Figures 1 to 6 An embodiment of the present invention provides a filter assembly for use in outdoor cleaning vehicles cleaning road guardrails. This embodiment improves the structure of the filter assembly to provide the advantage of grease separation. Specifically, taking the cleaning of grease from the surface of road guardrails as an example, as a preferred solution in this embodiment, the filter assembly is specifically an internal circulation filter assembly and an outdoor cleaning vehicle, capable of separating and recovering the oily wastewater generated by the outdoor cleaning vehicle after cleaning the road guardrail.

[0020] See also Figures 1 to 6 The present invention provides a technical solution: an internal circulation filter component, which is used in the scene where an outdoor cleaning vehicle is used to clean road guardrails.

[0021] An internal circulation filter assembly includes a separation mechanism 5 and an oil removal mechanism 6, wherein: The separation mechanism 5 includes a first conduit 504 and a drainage tube 502 having an input end and an output end. The first conduit 504 is disposed at the bottom of the drainage tube 502 and is located between the input end and the output end of the drainage tube 502. The oil removal mechanism 6 includes a second conduit 601, an aeration pipe 603, and a delivery pipe 604. The second conduit 601 is arranged at the top of the drainage pipe 502 and is parallel to the first conduit 504. Drain ports 503 are provided on the surface of the drainage pipe 502, corresponding to the second conduit 601 and the first conduit 504, respectively, so that the first conduit 504 and the second conduit 601 are both connected to the drainage pipe 502. The aeration pipe 603 is provided on the outer wall of the second conduit 601 and the output end is communicated with the second conduit 601 for aerating the second conduit 601. The delivery pipe 604 is provided above the second conduit 601 and the input end is communicated with the second conduit 601. The device further comprises a trigger mechanism, which is used to discharge the liquid in the drainage tube 502 when the water level in the second conduit 601 reaches a trigger condition.

[0022] In this embodiment, through the coordinated arrangement of the drainage pipe 502 and the first conduit 504, the collected wastewater can enter the drainage pipe 502 and flow into the first conduit 504 below until the drainage pipe 502 and multiple first conduits 504 are filled. The heavier impurities will directly settle downward along the first conduit 504, while the grease and oil impurities in the wastewater will float upward due to their low density, and then enter the second conduit 601 through the drain port 503, thereby achieving preliminary separation of grease and wastewater. Through the arrangement of the aeration pipe 603, air can be simultaneously sprayed inward from the outside of the second conduit 601, and the air generates tiny bubbles. The bubbles adhere to the oil particles and float up to form a scum layer. The conveying pipe 604 can convey and guide the scum layer from above, thereby achieving the separation operation of wastewater and grease.

[0023] In the above embodiment, as a preferred solution, a collecting mechanism 2 is also included, which includes a side guard plate 201, a collecting tray 202, a positioning sleeve 203 and a filter 204. The collecting tray 202 is fixedly mounted on the inner side of the bottom of the side guard plate 201, the positioning sleeve 203 is fixedly mounted on the inner bottom wall of the collecting tray 202, and the filter 204 is fixedly mounted on the inner side wall of the collecting tray 202 and is located on the outer side of the positioning sleeve 203. Through the setting of the side guard plate 201, a protective blocking space can be formed directly outside the cleaning component 1, so that when the cleaning component 1 is working, there will be no The throwing out of water droplets not only reduces the impact on surrounding pedestrians and vehicles, but also reduces the waste of water resources. The collection plate 202 and the filter screen 204 cooperate with each other. When the waste water falls after scrubbing, the filter screen 204 can be used to perform preliminary separation of larger impurities in the waste water, and the collection plate 202 converges the waste water, thereby realizing the collection of waste water and reducing the waste of water resources. The setting of the positioning sleeve 203 can block and protect the rotating connecting part of the cleaning component 1, thereby reducing the impact of impurities on the rotation of the cleaning component 1 and reducing wear.

[0024] In the above embodiment, as a preferred solution, a guide mechanism 3 is provided at the bottom of the collection tray 202, and the guide mechanism 3 includes a guide hole 301 and a guide tube 302. The guide hole 301 is opened in the middle of the bottom of the collection tray 202, and one end of the guide tube 302 is plugged into the inner wall of the guide hole 301. Through the setting of the guide hole 301, the wastewater collected by the collection tray 202 can be guided, so that the guide tube 302 collects and drains the wastewater, and then supplies water to the separation mechanism 5.

[0025] In the above embodiment, as a preferred solution, a water pump 4 is fixedly installed on the outer surface of the side guard plate 201, and the input end of the water pump 4 is plugged into the other end of the guide tube 302. Through the setting of the water pump 4, power can be provided for the supply of wastewater and water can be supplied to the separation mechanism 5.

[0026] In the above embodiment, as a preferred solution, the separation mechanism 5 further includes a connector 501, a mesh plate 505, a collection box 506, a drain pipe 507 and a sealing cover 508. One end of the connector 501 is plugged into the end of the drainage pipe 502, and the other end of the connector 501 is connected to the output end of the water pump 4 through a pipeline. The multiple mesh plates 505 are respectively fixedly installed in the multiple interfaces on the top of the collection box 506. The interfaces on the top of the collection box 506 are respectively threadedly connected to the bottom ends of the multiple first conduits 504. The drain pipe 507 is plugged and fixed to the bottom of the collection box 506. The sealing cover 508 is threadedly connected to the outer wall of the drain pipe 507. The setting of 01 can send the wastewater supplied by the water pump 4 into the drainage pipe 502, guide and transport the wastewater, and realize the connectivity of the pipeline. Through the setting of the mesh plate 505, the sediment can fall under the mesh plate 505 after entering the first conduit 504, and the mesh plate 505 can reduce the relative influence of the water flow on the upper and lower sides, and reduce the situation where the sediment is stirred up again, and the collection box 506 can collect and store the sediment, and the sewage pipe 507 and the sealing cover 508 can directly discharge the sediment outward with the help of the sewage pipe 507 and the sealing cover 508 after regular collection, so as to facilitate the staff to handle the sediment.

[0027] In the above embodiment, as a preferred solution, the oil removal mechanism 6 further includes an air inlet pipe 602, an exhaust pipe 609 and an air guide pipe 6010. The plurality of air inlet pipes 602 are respectively opened on the outer wall of the second conduit 601. The outer surface of the air inlet pipe 602 is connected to the plurality of joints of the aeration pipe 603. The exhaust pipe 609 is plugged into the top of the delivery pipe 604. One end of the air guide pipe 6010 is sleeved with the outer surface of the exhaust pipe 609. By setting the air inlet pipe 602, the aeration pipe 603 can be installed and fixed, so that the aeration pipe 603 is relatively connected to the second conduit 601, so that the gas enters the second conduit. The inside of the tube 601 and the joint of the aeration tube 603 are provided with microporous materials, which disperse the ejected gas into small bubbles, and then use the bubbles to adhere to the oil particles and float up to form a scum layer, so that the oil particles adhere to the bubbles, accelerate the separation of oil and water, and improve the oil removal efficiency. The exhaust pipe 609 can guide and transport the excess air during the scum transportation process, and send it into the connecting pipe 805 through the air guide pipe 6010 to avoid gas loss and waste. A hydrophobic PTFE filter element 804 is provided between the exhaust pipe 609 and the delivery pipe 604, which can prevent oil from passing through while allowing gas to pass normally.

[0028] In the above embodiment, as a preferred solution, the oil removal mechanism 6 further includes an oil drain pipe 605, a motor 607, a screw rod 608 and an oil storage tank 606. The oil drain pipe 605 is plugged into the bottom of the delivery pipe 604, the motor 607 is fixedly installed at the end of the delivery pipe 604, the screw rod 608 is rotatably connected to the inner wall of the delivery pipe 604, the output end of the motor 607 is transmission-connected to the end of the screw rod 608 via a key, and the oil storage tank 606 is threadedly connected to the end of the oil drain pipe 605. The rotation of the screw rod 608 driven by the motor 607 can transport and guide the floating scum layer, thereby utilizing the transport effect formed by the relative rotation between the screw rod 608 and the delivery pipe 604 to send the scum into the oil drain pipe 605, and the excess gas can be discharged to the outside, while the separated grease will flow into the oil storage tank 606, which is convenient for subsequent recycling and reuse, and also reduces the impact of direct grease discharge on the environment.

[0029] In the above embodiment, as a preferred solution, the trigger mechanism includes a pressure relief valve 7 connected to the end of the drainage pipe 502 by bolts. The other end of the pressure relief valve 7 is connected to the filter mechanism 8 by bolts, and the output end of the filter mechanism 8 is plugged into the water outlet pipe 9. Through the configuration of the pressure relief valve 7, when the water level in the second conduit 601 reaches the limit, the pressure generated will cause the pressure relief valve 7 to reach the threshold and open. At this time, the scum driven by it has been transported away by the rotation of the screw rod 608. Therefore, the water after the grease is separated will pass through the pressure relief valve 7 and enter the filter mechanism 8. After most of the water in the second conduit 601 is discharged, the pressure is lower than the threshold for opening the pressure relief valve 7, and then the pressure relief valve 7 will close, and then the second wastewater storage and separation step will be carried out again.

[0030] In the above embodiment, as a preferred solution, the filtering mechanism 8 includes a three-way pipe 801, a waste box 802, a protective shell 803, a filter element 804, a connecting pipe 805, a return pipe 806, a one-way valve 807, a solenoid valve 808, a fixing seat 809 and a positioning pipe 8010. The horizontal end of the three-way pipe 801 is connected to the end of the pressure relief valve 7 by a bolt, the waste box 802 is threadedly connected to the end below the three-way pipe 801, the protective shell 803 is fixedly installed at the end above the three-way pipe 801, the filter element 804 is arranged on the inner side wall of the protective shell 803, the connecting pipe 805 is plugged into the top of the protective shell 803, and one end of the return pipe 806 is plugged into On the outer wall of the waste box 802, one end of the return pipe 806 that penetrates into the waste box 802 is fixedly connected with the filter screen 204, the one-way valve 807 is fixedly installed on the other end of the return pipe 806, the outer surface of the connecting pipe 805 is plugged and fixed with the other end of the air guide pipe 6010, one end of the solenoid valve 808 is fixedly installed on the other end of the connecting pipe 805, the other end of the solenoid valve 808 is fixedly connected to the end of the fixing seat 809, one end of the positioning pipe 8010 is fixedly installed with the other end of the one-way valve 807, the other end of the positioning pipe 8010 is plugged into the outer wall of the fixing seat 809, and the inner wall of the fixing seat 809 is plugged and fixed with the end of the outlet pipe 9.

[0031] In the above embodiment, as a preferred solution, after the pressure relief valve 7 is opened, the separated waste water will enter the three-way pipe 801. At the same time, when the pressure relief valve 7 is opened, the solenoid valve 808 is opened in coordination, and the separated waste water will be filtered by the protective shell and the filter element 804, and then transported by the connecting pipe 805, the solenoid valve 808 and the fixing seat 809 to enter the outlet pipe 9. The outlet pipe 9 is connected to the water tank of the cleaning vehicle. At the same time, the air injected by the air guide pipe 6010 can increase the pressure in the connecting pipe 805, thereby accelerating the flow speed of the sewage and making the sewage quickly flow back into the water tank, realizing the circulation filtration and utilization of water, and the one-way valve 807 can prevent the waste water from entering the return pipe 806 along the positioning pipe 8010, thereby avoiding the water flow to the return pipe 806. The impurities in the waste box 802 have an impact, but after the pressure relief valve 7 is closed, the solenoid valve 808 is closed, and at this time the waste water will not flow into the three-way pipe 801, so the gas injected by the air guide pipe 6010 will enter the three-way pipe 801 along the connecting pipe 805, the protective shell, and the filter element 804, and then use the backflow of air to make the impurities filtered out from the bottom up by the filter element 804 be blown out again from the top down, so as to achieve the self-cleaning effect of the filter element 804, but the blown impurities will be guided by the three-way pipe 801 and enter the waste box 802 below, so as to collect the impurities, and the excess air will flow from the return pipe 806 to the top of the solenoid valve 808, push the water in the fixed seat 809 and the outlet pipe 9, and reduce the retention of waste water.

[0032] The present invention also provides an outdoor cleaning vehicle, comprising a cleaning vehicle body, a cleaning component 1 and an internal circulation filter component. The cleaning component 1 is arranged on the cleaning vehicle body, and the internal circulation filter component is arranged in the cleaning vehicle body and located on the outside of the cleaning component 1, and is used to filter the sewage input into the cleaning vehicle body.

[0033] In the present invention, the working steps of the device are as follows: 1. First, when cleaning the guardrail of the cleaning component 1, the side guard plate 201 blocks the water droplets from being thrown out, and the collection tray 202 receives the cleaning wastewater. When the wastewater passes through the filter 204, larger impurities are initially filtered out. The positioning sleeve 203 protects the rotating parts of the cleaning component 1 and reduces the wear of impurities. The guide hole 301 at the bottom of the collection tray 202 introduces the wastewater into the guide pipe 302. The water pump 4 is started to pump the wastewater into the drainage pipe 502 of the separation mechanism 5 through the connector 501.

[0034] 2. After the wastewater enters the drainage pipe 502, it flows into the first conduit 504 through the bottom drain port 503 until it fills the drainage pipe 502 and the first conduit 504. The heavier solid impurities sink along the first conduit 504 and fall into the collection box 506. The mesh plate 505 prevents the sediment from being stirred up by the water flow. The oil and fat impurities with lower density in the wastewater float upward and enter the second conduit 601 through the drain port 503 at the top of the drainage pipe 502, achieving preliminary separation of solid, liquid and oil.

[0035] 3. The aeration pipe 603 sprays air into the second conduit 601 through the air inlet pipe 602, forming tiny bubbles. The bubbles adhere to the oil particles and float up to form a scum layer. At the same time, the motor 607 drives the screw rod 608 to rotate, pushing the scum along the delivery pipe 604 to the oil discharge pipe 605, and finally flows into the oil storage tank 606 for recovery to avoid environmental pollution. The gas is introduced into the filter mechanism 8 through the exhaust pipe 609 at the top of the delivery pipe 604 and the air guide pipe 6010 to reduce gas waste. At the same time, the hydrophobic PTFE filter element 804 prevents grease from passing through.

[0036] 4. When the water level in the second conduit 601 reaches the threshold, the pressure relief valve 7 opens, and the wastewater after the oil and grease is separated enters the tee pipe 801 of the filter mechanism 8. The wastewater is filtered by the filter element 804 in the protective shell 803, and impurities are intercepted. The purified water enters the water outlet pipe 9 through the connecting pipe 805, the solenoid valve 808 and the fixing seat 809, and flows back to the water tank of the cleaning vehicle for recycling. The air introduced by the air guide pipe 6010 increases the pressure in the connecting pipe 805, accelerating the water circulation.

[0037] 5. After the pressure relief valve 7 is closed, the solenoid valve 808 is closed synchronously, and the air introduced by the air guide pipe 6010 flows in the opposite direction through the filter element 804, blowing off the intercepted impurities from bottom to top. The impurities fall into the waste box 802 along the three-way pipe 801 for collection. The sealing cover 508 at the bottom of the collection box 506 is opened regularly to discharge the solid impurities. The oil storage tank 606 and the waste box 802 can be disassembled and cleaned separately to realize centralized waste treatment.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An internal circulation filter assembly, characterized in that: It comprises a separation mechanism (5) and an oil removal mechanism (6), wherein: The separation mechanism (5) comprises a first conduit (504) and a drainage tube (502) having an input end and an output end, wherein the first conduit (504) is arranged at the bottom of the drainage tube (502) and is located between the input end and the output end of the drainage tube (502); The oil removal mechanism (6) comprises a second conduit (601), an aeration pipe (603) and a delivery pipe (604); the second conduit (601) is arranged on the top of the drainage pipe (502) and is parallel to the first conduit (504); a surface of the drainage pipe (502) is provided with drainage ports (503) corresponding to the second conduit (601) and the first conduit (504), so that both the first conduit (504) and the second conduit (601) are in communication with the drainage pipe (502); The aeration pipe (603) is arranged on the outer wall of the second conduit (601) and the output end is in communication with the second conduit (601), and is used to aerate the second conduit (601); the delivery pipe (604) is arranged above the second conduit (601) and the input end is in communication with the second conduit (601); It also includes a trigger mechanism, which is used to discharge the liquid in the drainage tube (502) when the water level in the second conduit (601) reaches a trigger condition.

2. An internal circulation filter assembly according to claim 1, characterized in that: The invention also includes a collecting mechanism (2), the collecting mechanism (2) including a side guard plate (201), a collecting tray (202), a positioning sleeve (203) and a filter screen (204), the collecting tray (202) being fixedly mounted on the inner side of the bottom of the side guard plate (201), the positioning sleeve (203) being fixedly mounted on the inner bottom wall of the collecting tray (202), and the filter screen (204) being fixedly mounted on the inner side wall of the collecting tray (202) and being located on the outer side of the positioning sleeve (203).

3. The internal circulation filter assembly according to claim 2, characterized in that: A guide mechanism (3) is provided at the bottom of the collecting tray (202), the guide mechanism (3) comprising a guide hole (301) and a guide tube (302), the guide hole (301) being opened in the middle of the bottom of the collecting tray (202), and one end of the guide tube (302) being plugged into the inner side wall of the guide hole (301).

4. The internal circulation filter assembly according to claim 2, characterized in that: A water pump (4) is fixedly mounted on the outer surface of the side guard plate (201), and the input end of the water pump (4) is plugged into the other end of the guide tube (302).

5. The internal circulation filter assembly according to claim 4, characterized in that: The separation mechanism (5) further comprises a connector (501), a mesh plate (505), a collection box (506), a drainage pipe (507) and a sealing cover (508); one end of the connector (501) is plugged into the end of the drainage pipe (502); the other end of the connector (501) is connected to the output end of the water pump (4) via a pipeline; a plurality of mesh plates (505) are respectively fixedly mounted in a plurality of interfaces at the top of the collection box (506); the interfaces at the top of the collection box (506) are respectively threadedly connected to the bottom ends of a plurality of the first conduits (504); the drainage pipe (507) is plugged into and fixed to the bottom of the collection box (506); and the sealing cover (508) is threadedly connected to the outer wall of the drainage pipe (507).

6. The internal circulation filter assembly according to claim 1, characterized in that: The oil removal mechanism (6) further comprises an air inlet pipe (602), an exhaust pipe (609) and an air guide pipe (6010), wherein the plurality of air inlet pipes (602) are respectively provided on the outer wall of the second guide pipe (601), the outer surface of the air inlet pipe (602) is connected to the plurality of joints of the aeration pipe (603), the exhaust pipe (609) is plugged into the top of the delivery pipe (604), and one end of the air guide pipe (6010) is sleeved with the outer surface of the exhaust pipe (609).

7. The internal circulation filter assembly according to claim 6, characterized in that: The oil removal mechanism (6) further comprises an oil drain pipe (605), a motor (607), a screw rod (608) and an oil storage tank (606); the oil drain pipe (605) is plugged into the bottom of the delivery pipe (604); the motor (607) is fixedly mounted on the end of the delivery pipe (604); the screw rod (608) is rotatably connected to the inner wall of the delivery pipe (604); the output end of the motor (607) is transmission-connected to the end of the screw rod (608) via a key; and the oil storage tank (606) is threadedly connected to the end of the oil drain pipe (605).

8. The internal circulation filter assembly according to claim 1, characterized in that: The trigger mechanism comprises a pressure relief valve (7) connected to the end of the drainage pipe (502) via bolts, the other end of the pressure relief valve (7) is connected to a filter mechanism (8) via bolts, and the output end of the filter mechanism (8) is plugged into a water outlet pipe (9).

9. The internal circulation filter assembly according to claim 8, characterized in that: The filtering mechanism (8) comprises a three-way pipe (801), a waste box (802), a protective shell (803), a filter element (804), a connecting pipe (805), a return pipe (806), a one-way valve (807), a solenoid valve (808), a fixing seat (809) and a positioning pipe (8010), wherein the horizontal end of the three-way pipe (801) is connected to the end of the pressure relief valve (7) by a bolt, the waste box (802) is threadedly connected to the end below the three-way pipe (801), the protective shell (803) is fixedly installed on the end above the three-way pipe (801), the filter element (804) is arranged on the inner side wall of the protective shell (803), the connecting pipe (805) is plugged into the top of the protective shell (803), and one end of the return pipe (806) is plugged into the The outer wall of the waste box (802), one end of the return pipe (806) that penetrates into the waste box (802) is fixedly connected with a filter screen, the one-way valve (807) is fixedly installed on the other end of the return pipe (806), the outer surface of the connecting pipe (805) is plugged and fixed with the other end of the air guide pipe (6010), one end of the solenoid valve (808) is fixedly installed on the other end of the connecting pipe (805), the other end of the solenoid valve (808) is fixedly connected to the end of the fixing seat (809), one end of the positioning pipe (8010) is fixedly installed with the other end of the one-way valve (807), the other end of the positioning pipe (8010) is plugged with the outer wall of the fixing seat (809), and the inner wall of the fixing seat (809) is plugged and fixed with the end of the water outlet pipe (9).

10. An outdoor cleaning vehicle, characterized by: The invention comprises a cleaning vehicle body, a cleaning component (1) and an internal circulation filter component according to any one of claims 1 to 9, wherein the cleaning component (1) is arranged on the cleaning vehicle body, and the internal circulation filter component is arranged in the cleaning vehicle body and located outside the cleaning component (1), and is used to filter sewage input from the cleaning vehicle body.

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