Sewage suction truck for drainage pipe treatment

By designing an inclined filter screen, a material guiding mechanism, a water spraying mechanism, and a suction mechanism on the vacuum truck, the problems of filter screen clogging and suction pipe collapse in vacuum trucks have been solved, realizing a multi-functional vacuum truck design and enhancing the effectiveness of vacuum truck use.

CN121897068APending Publication Date: 2026-04-21FUJIAN SHENGLI ENVIRONMENTAL TECH CO LTD
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Patent Information

Application Number
CN202311743934.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-18
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

Existing vacuum trucks are prone to filter clogging and suction pipe collapse, have limited functionality, and cannot effectively spray water while in motion.

Method used

A sewage suction truck for drainage pipe treatment was designed, which adopts an inclined filter screen, a material guiding mechanism, a water spraying mechanism and a suction mechanism. Through solid-liquid separation, water spraying and anti-collapse design, the filter screen is prevented from clogging, the suction pipe is collapsed and the water spraying function is added.

Benefits of technology

It achieves the multi-functionality of a vacuum truck, avoids filter clogging and suction pipe collapse, and can effectively spray water during operation, thus enhancing the effectiveness of the vacuum truck.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of drainage pipe treatment, in particular to a sewage suction truck for drainage pipe treatment, which comprises a truck body, a sewage tank is fixed on the surface of the truck body, a drainage control key is mounted in a cab of the truck body, a filter screen is fixed in the sewage tank, and a sewage suction mechanism is arranged at one end of the sewage tank. The sewage suction mechanism is composed of a water pump, a valve body, a connecting pipe, a suction pipe, a blocking door and a water outlet pipe, a suction mechanism is arranged on one side of the sewage tank and composed of a liquid guide pipe and a suction part, and a watering mechanism is arranged at one end of the vehicle body and composed of a water guide assembly and a spray head. And a material guide mechanism is arranged in the sewage tank, and the material guide mechanism is composed of a fixing frame and a material guide assembly. The phenomenon that the filter screen is blocked when the suction-type sewer scavenger is used is avoided, the functionality of the suction-type sewer scavenger is higher when the suction-type sewer scavenger is used, and the phenomenon that the suction pipe sucks flat when the suction-type sewer scavenger is used is avoided.
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Description

Technical Field

[0001] This invention relates to the field of drainage pipe treatment technology, specifically to a vacuum truck for drainage pipe treatment. Background Technology

[0002] Drainage pipes refer to the system of pipes and their ancillary facilities that collect and discharge sewage, wastewater and rainwater. They include main pipes, branch pipes and pipes leading to treatment plants. Every once in a while, sewage suction trucks are needed to vacuum the drainage pipes. Sewage suction trucks are a new type of sanitation vehicle used to collect, transfer, clean and transport sewage and wastewater to avoid secondary pollution.

[0003] After vacuuming sewage, the vacuum truck performs solid-liquid separation. However, ordinary vacuum trucks only separate the solids through a filter screen, which is not good at guiding impurities on the surface of the filter screen, making it easy for the filter screen to become clogged during use. Ordinary vacuum trucks can only vacuum sewage from the drain pipe. After vacuuming, the vacuum truck will drive to the sewage treatment plant for processing. It is not easy to spray water on the road along the way, which makes the vacuum truck's function relatively limited. The suction pipe of the vacuum truck is generally a rubber hose with steel wire and a flat shape at the end. When it encounters a flat surface or thick sludge during suction operation, it is easy to form a vacuum and generate a large negative pressure, causing the suction pipe to collapse. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum truck for drain pipe treatment, in order to solve the problems mentioned in the background art, such as the easy clogging of the filter screen, the limited functionality, and the easy collapse of the suction pipe.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sewage suction truck for drainage pipe treatment, comprising a vehicle body, a sewage tank fixed to the surface of the vehicle body, a control gate installed in the driver's cab of the vehicle body, a filter screen fixed inside the sewage tank, the filter screen having an inclined structure, a sewage suction mechanism provided at one end of the sewage tank, the sewage suction mechanism consisting of a water pump, a valve body, a connecting pipe, a suction pipe, a baffle, and a water outlet pipe, a suction mechanism provided on one side of the sewage tank, the suction mechanism consisting of a liquid guide pipe and a suction component, a water spraying mechanism provided at one end of the vehicle body, the water spraying mechanism consisting of a water guide component and a nozzle, and a material guiding mechanism provided inside the sewage tank, the material guiding mechanism consisting of a fixing frame and a material guiding component.

[0006] Preferably, a water pump is installed at one end of the sewage tank, the input end of the water pump is electrically connected to the output end of the control key, one end of the water pump extends through a pipe to the top of the filter screen inside the sewage tank, a connecting pipe is fixed to one end of the water pump, and a suction pipe is connected to one end of the connecting pipe through a flange.

[0007] Preferably, a baffle is rotatably connected to the bottom of one end of the sewage tank. The baffle and the hydraulic assembly are detachably connected to the sewage tank. A water outlet pipe is fixed to the surface of the baffle. A valve body is fitted onto the surface of both the water outlet pipe and the connecting pipe.

[0008] Preferably, the liquid guide tube is fixed to one end of the suction tube, and a suction component is fixed to one end of the liquid guide tube.

[0009] Preferably, the suction component includes a tube head, a groove, and a connecting post inside. A tube head is provided on one side of the liquid guide tube, and a connecting post is fixed circumferentially on the surface of the tube head. One end of the connecting post is fixedly connected to the surface of the liquid guide tube, and a groove is provided at the bottom of the tube head.

[0010] Preferably, a water guiding assembly is installed at one end of the vehicle body, and nozzles are installed on the surface of the water guiding assembly. The input end of the nozzles is electrically connected to the output end of the control key.

[0011] Preferably, the water guiding assembly includes a liquid guiding hose, a cover plate, a water tank, an adsorption layer, and a valve. A water tank is fixed to one end of the vehicle body and is connected to a spray nozzle. An adsorption layer is installed inside the water tank. A cover plate is installed on the surface of the water tank and is detachably connected to the water tank by screws. A liquid guiding hose is fixed at the center of the cover plate and is connected to a wastewater tank. A valve is fitted on the surface of the liquid guiding hose.

[0012] Preferably, a fixing frame is fixed at one end of the inside of the sewage tank, and a material guiding assembly is installed on the inner side of the fixing frame.

[0013] Preferably, the material guiding assembly includes a water guiding hole, a drive motor, a material guiding cover, a material guiding cylinder, a screw conveyor, a control valve, and a sewage discharge pipe. The material guiding cylinder is fixed between the sewage tank and the fixed frame. One end of the material guiding cylinder extends to the outside of the sewage tank. The surface of the fixed frame is inlaid with a material guiding cover. The material guiding cover is located at the bottom of the filter screen and is connected to the material guiding cylinder.

[0014] Preferably, a spiral conveying rod is provided inside the feed cylinder, a drive motor is installed on one side of the sewage tank, the input end of the drive motor is electrically connected to the output end of the control key, the output end of the drive motor is fixed to a rotating shaft through a coupling, one end of the rotating shaft is fixedly connected to one end of the spiral conveying rod, a sewage pipe is fixed to the bottom of one end of the feed cylinder, and a control valve is fitted on the surface of the sewage pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the vacuum truck for drainage pipe treatment not only avoids the phenomenon of filter screen clogging during the use of the vacuum truck, making the vacuum truck more functional, but also avoids the phenomenon of suction pipe collapsing during the use of the vacuum truck.

[0016] 1. With the material guiding mechanism, sewage undergoes solid-liquid separation under the action of the filter screen. The separated solid impurities fall along the filter screen into the inside of the material guiding cover and then into the inside of the material guiding cylinder. The residual sewage in the solid impurities is discharged into the sewage tank through the water guiding hole. After the sewage in the sewage tank is discharged, the control key can be operated to control the drive motor to work. Then the control valve is opened, and the drive motor drives the screw conveyor to rotate, transporting the solid impurities and discharging them through the sewage pipe. This realizes the material guiding function of the sewage suction truck for solid impurities, thereby avoiding the phenomenon of filter screen clogging when the sewage suction truck is used.

[0017] 2. Equipped with a water spraying mechanism, after the vacuum truck finishes vacuuming, the valve is opened, and the vehicle is driven to the sewage treatment plant. While driving, the control key can be operated to open the spray nozzles, allowing the sewage inside the sewage tank to be guided through the liquid guide hose to the inside of the water spraying tank. Under the action of the adsorption layer, the sewage is filtered and then sprayed out through the nozzles to spray the road surface along the driving route, thereby realizing the water spraying function of the vacuum truck and making the vacuum truck more functional when in use.

[0018] 3. Equipped with a suction mechanism, the vehicle travels to the drain pipe to be treated, and then inserts one end of the suction pipe into the drain pipe. If the pipe head encounters a flat surface or the sludge is thick, water will not easily enter the suction pipe along the pipe head. In this case, the sewage can enter the interior of the guide pipe through the gaps and grooves between the connecting columns, and thus enter the suction pipe. This avoids the conventional suction pipe opening being flat, which can easily create a vacuum and generate a large negative pressure when encountering a flat surface or thick sludge during suction operations, causing the suction pipe to collapse. This achieves the anti-collapse function of the vacuum truck, thus preventing the suction pipe from collapsing during the use of the vacuum truck. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a side cross-sectional view of the present invention.

[0021] Figure 3 This is an enlarged structural schematic diagram of the main cross-sectional view of the water tank of the present invention;

[0022] Figure 4 This is a three-dimensional enlarged structural diagram of the water spraying mechanism of the present invention;

[0023] Figure 5 This is a three-dimensional enlarged structural diagram of the suction mechanism of the present invention;

[0024] Figure 6 This is a partially enlarged structural schematic diagram of the present invention.

[0025] In the diagram: 1. Vehicle body; 101. Sewage tank; 102. Control key; 103. Filter screen; 2. Sewage suction mechanism; 201. Water pump; 202. Valve body; 203. Connecting pipe; 204. Suction pipe; 205. Baffle; 206. Water outlet pipe; 3. Suction mechanism; 301. Liquid guide pipe; 302. Suction component; 3021. Pipe head; 3022. Groove; 3023. Connecting column; 4. Sprinkler mechanism; 401. Water guiding assembly; 4011, liquid guiding hose; 4012, cover plate; 4013, water tank; 4014, adsorption layer; 4015, valve; 402, nozzle; 5, material guiding mechanism; 501, fixing frame; 502, material guiding assembly; 5021, water guiding hole; 5022, drive motor; 5023, material guiding cover; 5024, material guiding cylinder; 5025, screw conveyor rod; 5026, control valve; 5027, sewage pipe. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] The present invention provides a vacuum truck for drain pipe treatment with the following structure: Figure 1 and Figure 2 As shown, the vehicle includes a vehicle body 1, a sewage tank 101 fixed on the surface of the vehicle body 1, a control key 102 installed in the driver's cab of the vehicle body 1, the control key 102 can be of the LA series, and a filter screen 103 is fixed inside the sewage tank 101, the filter screen 103 has an inclined structure.

[0028] Furthermore, such as Figure 2 and Figure 6As shown, a suction mechanism 2 is provided at one end of the sewage tank 101. The suction mechanism 2 consists of a water pump 201, a valve body 202, a connecting pipe 203, a suction pipe 204, a baffle 205, and a water outlet pipe 206. The water pump 201 is installed at one end of the sewage tank 101. The model of the water pump 201 can be SLG series. The input end of the water pump 201 is electrically connected to the output end of the control key 102. One end of the water pump 201 extends through a pipe to the top of the filter screen 103 inside the sewage tank 101. The connecting pipe 203 is fixed at one end of the water pump 201. The suction pipe 204 is connected to one end of the connecting pipe 203 through a flange. A baffle 205 is rotatably connected at the bottom of one end of the sewage tank 101. The baffle 205 and the hydraulic components are detachably connected to the sewage tank 101. The water outlet pipe 206 is fixed on the surface of the baffle 205. The valve body 202 is fitted on the surface of both the water outlet pipe 206 and the connecting pipe 203.

[0029] Furthermore, such as Figure 5 As shown, a suction mechanism 3 is provided on one side of the sewage tank 101. The suction mechanism 3 consists of a liquid guide pipe 301 and a suction component 302. The liquid guide pipe 301 is fixed to one end of the suction pipe 204. The suction component 302 is fixed to one end of the liquid guide pipe 301. The suction component 302 includes a pipe head 3021, a groove 3022 and a connecting post 3023 inside. The pipe head 3021 is provided on one side of the liquid guide pipe 301. The connecting post 3023 is fixed to the surface of the pipe head 3021 along the circumference. One end of the connecting post 3023 is fixedly connected to the surface of the liquid guide pipe 301. The bottom of the pipe head 3021 is provided with a groove 3022.

[0030] When in use, the vehicle body 1 drives to the drain pipe to be treated, and then inserts one end of the suction pipe 204 into the drain pipe. If the pipe head 3021 touches a flat surface or the sludge is thick, water will not easily enter the suction pipe 204 along the pipe head 3021. At this time, the sewage can enter the liquid guide pipe 301 through the gap and groove 3022 between the connecting columns 3023, and then enter the suction pipe 204. This avoids the conventional suction pipe 204 having a flat opening, which can easily form a vacuum when encountering a flat surface or thick sludge during suction operations, generating a large negative pressure and causing the suction pipe 204 to collapse, thus realizing the anti-collapse function of the sewage suction truck.

[0031] Furthermore, such as Figure 4 and Figure 6As shown, a water spraying mechanism 4 is provided at one end of the vehicle body 1. The water spraying mechanism 4 consists of a water guiding component 401 and a nozzle 402. The water guiding component 401 is installed at one end of the vehicle body 1, and the surface of the water guiding component 401 is equipped with nozzles 402. The nozzles 402 can be of the SK series. The input end of the nozzles 402 is electrically connected to the output end of the control key 102. The interior of the water guiding component 401 includes a liquid guiding hose 4011, a cover plate 4012, a water tank 4013, an adsorption layer 4014, and a valve. 4015, a water tank 4013 is fixed to one end of the vehicle body 1. The water tank 4013 is connected to the nozzle 402. An adsorption layer 4014 is installed inside the water tank 4013. A cover plate 4012 is provided on the surface of the water tank 4013. The cover plate 4012 is connected to the water tank 4013 by screws. A liquid guiding hose 4011 is fixed at the center of the cover plate 4012. The liquid guiding hose 4011 is connected to the sewage tank 101. A valve 4015 is fitted on the surface of the liquid guiding hose 4011.

[0032] When in use, after the vacuum truck has finished vacuuming the sewage, open valve 4015, and then drive vehicle 1 to the sewage treatment site. While driving, you can operate control key 102 to control the nozzle 402 to open, so that the sewage inside the sewage tank 101 is guided to the inside of the water tank 4013 through the liquid guiding hose 4011. Under the action of the adsorption layer 4014, the sewage is filtered and then sprayed out through the nozzle 402 to spray the road surface along the driving route, so as to realize the water spraying function of the vacuum truck.

[0033] Furthermore, such as Figure 3As shown, a material guiding mechanism 5 is provided inside the sewage tank 101. The material guiding mechanism 5 consists of a fixed frame 501 and a material guiding assembly 502. The fixed frame 501 is fixed to one end inside the sewage tank 101. The material guiding assembly 502 is installed on the inner side of the fixed frame 501. The material guiding assembly 502 includes a water guiding hole 5021, a drive motor 5022, a material guiding cover 5023, a material guiding cylinder 5024, a screw conveyor 5025, a control valve 5026, and a sewage discharge pipe 5027. The material guiding cylinder 5024 is fixed between the sewage tank 101 and the fixed frame 501. One end of the material guiding cylinder 5024 extends to the outside of the sewage tank 101. The material guiding cover 5023 is embedded on the surface of the fixed frame 501. The guide cover 5023 is located at the bottom of the filter screen 103. The guide cover 5023 is connected to the guide cylinder 5024. The guide cylinder 5024 is equipped with a screw conveyor 5025. A drive motor 5022 is installed on one side of the sewage tank 101. The model of the drive motor 5022 can be JO series. The input end of the drive motor 5022 is electrically connected to the output end of the control key 102. The output end of the drive motor 5022 is fixed with a rotating shaft through a coupling. One end of the rotating shaft is fixedly connected to one end of the screw conveyor 5025. A sewage pipe 5027 is fixed at the bottom of one end of the guide cylinder 5024. A control valve 5026 is fitted on the surface of the sewage pipe 5027.

[0034] During use, wastewater undergoes solid-liquid separation under the action of filter screen 103. The separated solid impurities fall along filter screen 103 into the interior of guide cover 5023 and then into guide cylinder 5024. The remaining wastewater in the solid impurities is discharged into wastewater tank 101 through water guide hole 5021. After the wastewater in wastewater tank 101 is discharged, control key 102 can be operated to control drive motor 5022 to work. Then, control valve 5026 is opened, and under the action of drive motor 5022, the screw conveyor 5025 is rotated to transport the solid impurities and discharge them through sewage pipe 5027, so as to realize the function of guiding solid impurities by the vacuum truck.

[0035] Working principle: When in use, first drive the vehicle body 1 to the drain pipe to be treated, then insert one end of the suction pipe 204 into the drain pipe. If the pipe head 3021 touches a flat surface or the sludge is thick, water will not easily enter the suction pipe 204 along the pipe head 3021. At this time, the sewage can enter the liquid guide pipe 301 through the gap and groove 3022 between the connecting columns 3023, and then enter the suction pipe 204. This avoids the conventional suction pipe 204 having a flat opening, which can easily form a vacuum when encountering a flat surface or thick sludge during suction operations, generating a large negative pressure and causing the suction pipe 204 to collapse. This achieves the anti-collapse function of the vacuum truck, thus preventing the suction pipe 204 from collapsing during the use of the vacuum truck.

[0036] Then, open the valve body 202 on the surface of the connecting pipe 203, and operate the control key 102 to control the water pump 201 to work. Under the action of the water pump 201, the sewage inside the drain pipe is sucked into the sewage tank 101. At this time, the sewage undergoes solid-liquid separation under the action of the filter screen 103. The separated solid impurities fall along the filter screen 103 into the inside of the guide cover 5023, and then along the guide cover 5023 into the inside of the guide cylinder 5024. The sewage remaining in the solid impurities passes through the water guide hole. 5021 is discharged into the sewage tank 101. After the sewage in the sewage tank 101 is discharged, the control key 102 can be operated to control the drive motor 5022 to work. Then the control valve 5026 is opened. Under the action of the drive motor 5022, the screw conveyor 5025 is driven to rotate, which transports the solid impurities and discharges them through the sewage pipe 5027. This realizes the function of guiding solid impurities by the vacuum truck, thereby avoiding the phenomenon of filter screen 103 clogging when the vacuum truck is used.

[0037] After the vacuum truck finishes vacuuming, open valve 4015 and drive vehicle 1 to the sewage treatment plant. While driving, operate control key 102 to open nozzle 402, allowing sewage in sewage tank 101 to be guided through liquid guide hose 4011 to the interior of water tank 4013. Under the action of adsorption layer 4014, the sewage is filtered and then sprayed out through nozzle 402 to spray the road surface along the driving route, thus realizing the water spraying function of vacuum truck and making vacuum truck more functional. When driving to the sewage treatment plant, open gate 205 to discharge sewage into the treatment pool, thus completing the use of vacuum truck.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A vacuum truck for drain pipe treatment, comprising a vehicle body (1), characterized in that: A sewage tank (101) is fixed to the surface of the vehicle body (1). A control key (102) is installed in the driver's cab of the vehicle body (1). A filter screen (103) is fixed inside the sewage tank (101). The filter screen (103) has an inclined structure. A sewage suction mechanism (2) is provided at one end of the sewage tank (101). The sewage suction mechanism (2) consists of a water pump (201), a valve body (202), a connecting pipe (203), a suction pipe (204), a baffle (205), and a water outlet. The sewage tank (101) is composed of a pipe (206), and a suction mechanism (3) is provided on one side of the sewage tank (101). The suction mechanism (3) is composed of a liquid guide pipe (301) and a suction component (302). A water spraying mechanism (4) is provided at one end of the vehicle body (1). The water spraying mechanism (4) is composed of a water guide component (401) and a nozzle (402). A material guiding mechanism (5) is provided inside the sewage tank (101). The material guiding mechanism (5) is composed of a fixing frame (501) and a material guiding component (502).

2. The vacuum truck for drain pipe treatment according to claim 1, characterized in that: A water pump (201) is installed at one end of the sewage tank (101). The input end of the water pump (201) is electrically connected to the output end of the control key (102). One end of the water pump (201) extends through a pipe to the top of the filter screen (103) inside the sewage tank (101). A connecting pipe (203) is fixed to one end of the water pump (201). A suction pipe (204) is connected to one end of the connecting pipe (203) through a flange.

3. A vacuum truck for drain pipe treatment according to claim 2, characterized in that: A baffle (205) is rotatably connected to the bottom of one end of the sewage tank (101). The baffle (205) and the hydraulic components are detachably connected to the sewage tank (101). A water outlet pipe (206) is fixed on the surface of the baffle (205). A valve body (202) is fitted on the surface of both the water outlet pipe (206) and the connecting pipe (203).

4. A vacuum truck for drain pipe treatment according to claim 1, characterized in that: The liquid guide tube (301) is fixed to one end of the suction tube (204), and a suction component (302) is fixed to one end of the liquid guide tube (301).

5. A vacuum truck for drain pipe treatment according to claim 4, characterized in that: The suction component (302) includes a tube head (3021), a groove (3022), and a connecting post (3023). The tube head (3021) is provided on one side of the liquid guide tube (301). The connecting post (3023) is fixed circumferentially on the surface of the tube head (3021). One end of the connecting post (3023) is fixedly connected to the surface of the liquid guide tube (301). The bottom of the tube head (3021) is provided with a groove (3022).

6. A vacuum truck for drain pipe treatment according to claim 1, characterized in that: A water guiding assembly (401) is installed at one end of the vehicle body (1). A nozzle (402) is installed on the surface of the water guiding assembly (401). The input end of the nozzle (402) is electrically connected to the output end of the control key (102).

7. A vacuum truck for drain pipe treatment according to claim 6, characterized in that: The internal components of the water guiding assembly (401) include a liquid guiding hose (4011), a cover plate (4012), a water tank (4013), an adsorption layer (4014), and a valve (4015). A water tank (4013) is fixed to one end of the vehicle body (1). The water tank (4013) is connected to the nozzle (402). An adsorption layer (4014) is installed inside the water tank (4013). A cover plate (4012) is provided on the surface of the water tank (4013). The cover plate (4012) is connected to the water tank (4013) by screws. A liquid guiding hose (4011) is fixed at the center of the cover plate (4012). The liquid guiding hose (4011) is connected to the sewage tank (101). A valve (4015) is fitted on the surface of the liquid guiding hose (4011).

8. A vacuum truck for treating drainage pipes according to claim 1, characterized in that: A fixing frame (501) is fixed at one end inside the sewage tank (101), and a material guiding assembly (502) is installed on the inner side of the fixing frame (501).

9. A vacuum truck for drain pipe treatment according to claim 8, characterized in that: The material guiding assembly (502) includes a water guiding hole (5021), a drive motor (5022), a material guiding cover (5023), a material guiding cylinder (5024), a screw conveyor (5025), a control valve (5026), and a sewage pipe (5027). The material guiding cylinder (5024) is fixed between the sewage tank (101) and the fixing frame (501). One end of the material guiding cylinder (5024) extends to the outside of the sewage tank (101). The surface of the fixing frame (501) is inlaid with the material guiding cover (5023). The material guiding cover (5023) is located at the bottom of the filter screen (103). The material guiding cover (5023) is connected to the material guiding cylinder (5024).

10. A vacuum truck for treating drainage pipes according to claim 9, characterized in that: The feed cylinder (5024) is equipped with a spiral conveying rod (5025) inside. A drive motor (5022) is installed on one side of the sewage tank (101). The input end of the drive motor (5022) is electrically connected to the output end of the control key (102). The output end of the drive motor (5022) is fixed with a rotating shaft through a coupling. One end of the rotating shaft is fixedly connected to one end of the spiral conveying rod (5025). A sewage pipe (5027) is fixed at the bottom of one end of the feed cylinder (5024). A control valve (5026) is fitted on the surface of the sewage pipe (5027).