CN112813894A - Sweeper with sweeping device replaced according to types of garbage in sweeping field - Google Patents

Sweeper with sweeping device replaced according to types of garbage in sweeping field Download PDF

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Publication number
CN112813894A
CN112813894A CN201911126760.6A CN201911126760A CN112813894A CN 112813894 A CN112813894 A CN 112813894A CN 201911126760 A CN201911126760 A CN 201911126760A CN 112813894 A CN112813894 A CN 112813894A
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CN
China
Prior art keywords
fixedly connected
cleaning
dust absorption
water
sweeper
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Pending
Application number
CN201911126760.6A
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Chinese (zh)
Inventor
邹思敏
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Hunan University of Technology
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Hunan University of Technology
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Publication date
Application filed by Hunan University of Technology filed Critical Hunan University of Technology
Priority to CN201911126760.6A priority Critical patent/CN112813894A/en
Publication of CN112813894A publication Critical patent/CN112813894A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
    • E01H1/0836Apparatus dislodging all of the dirt by suction ; Suction nozzles
    • E01H1/0845Apparatus dislodging all of the dirt by suction ; Suction nozzles with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H3/00Applying liquids to roads or like surfaces, e.g. for dust control; Stationary flushing devices
    • E01H3/02Mobile apparatus, e.g. watering-vehicles

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

The invention relates to the technical field of sweeper trucks, and discloses a sweeper truck for replacing a cleaning device according to the type of garbage in a cleaning place. This change cleaning device's motor sweeper according to kind of cleaning place rubbish, when cleaning the many road conditions of dust rubbish, open the dust absorption pump, the dust absorption pump can produce very big ground wind-force, because the dust absorption mouth is equipped with to dust absorption pump bottom, the dust absorption mouth can restrict wind-force in this region of dust absorption mouth, all rubbish that passes through dust absorption mouth department all can be sucked by the dust absorption pump and through transit pipeline commentaries on classics deposit in rubbish deposit the district wait to handle, open the inside fresh water of transfer water pump extraction fresh water district afterwards and spray ground, and utilize clean mop to accomplish the final stage work that cleans with the earth's surface cleanness once.

Description

Sweeper with sweeping device replaced according to types of garbage in sweeping field
Technical Field
The invention relates to the technical field of sweeper trucks, in particular to a sweeper truck with a sweeping device replaced according to the type of garbage in a sweeping field.
Background
The sweeper is a sweeping device integrating road surface sweeping, garbage recovery and transportation, is suitable for sweeping operation of various climates and different road surfaces due to simple use and wide application range, is often used in places such as factories, highways, parks and the like needing large-scale road section cleaning, has considerable development prospect, and is gradually developed towards multifunctional automation.
Although the existing sweeper can complete road surface cleaning once, road surface cleaning and ground water sprinkling work after cleaning, the sweeper can only clean simple road conditions, if oily ground or ground with more viscous substances is met, the sweeper cannot clean completely, slip phenomenon can even occur when the sweeper works on the oily ground to cause accidents, if the sweeper is a park road section, the unclean ground can influence the cleanliness of the ground, a very bad feeling is given to people, the good feeling of the masses to the place is reduced, the park can not be used again next time, the passenger flow is influenced to a great extent, the income of the park is reduced, and therefore the multifunctional sweeper is of great importance for cleaning the complex ground.
In order to solve the above problems, the inventor proposes a sweeper with a cleaning device replaced according to the type of garbage in a cleaning place, which has the advantages of multiple cleaning functions.
Disclosure of Invention
Technical scheme (I)
In order to achieve the purpose of having multiple cleaning functions, the invention provides the following technical scheme: a sweeper capable of replacing a cleaning device according to the type of garbage in a cleaning place comprises a sweeper body main body, wherein the sweeper body main body comprises a series of sweeper parts such as wheels, a vehicle seat and a steering wheel, a protection plate is fixedly connected to the bottom of the sweeper body main body, an image recognition and detection device is fixedly connected to the bottom of the sweeper body main body and can analyze the type of the garbage on the earth surface and send information to an operator, a water storage tank is fixedly connected to the top end of the sweeper body main body, an inlet pipeline is fixedly connected to the top end of the water storage tank, a partition plate is fixedly connected to the inside of the water storage tank and divides the water storage tank into a fresh water area and a clean water area, a fresh water area is arranged inside the water storage tank, common water is stored in the fresh water area, a clean water area is arranged inside the water storage tank, a mixed liquid of a cleaning agent and water is stored in the clean water, the bottom fixedly connected with pivot of rotating electrical machines, the outside fixed surface of pivot is connected with the puddler, the inside fixedly connected with one-level water pipe of water storage tank, the one end fixedly connected with transfer water pump of water storage tank is kept away from to the one-level water pipe, the left side fixedly connected with second grade water pipe of transfer water pump, the inside fixedly connected with lift post of second grade water pipe, the clean shower nozzle of bottom fixedly connected with of lift post, the bottom fixedly connected with fixed column of automobile body main part, the clean mop of bottom fixedly connected with of fixed column, the clean scraper blade of bottom fixedly connected with of automobile body main part, the inside fixedly connected with dust absorption pump of automobile body main part, the bottom fixedly connected with dust absorption mouth of dust absorption pump, the right side fixedly connected with transfer pipeline of dust absorption pump, the district is deposited to the one end fixedly connected.
Preferably, 8 stirring rods are fixedly arranged at least and are arranged on the rotating shaft step by step, so that the added cleaning agent can be stirred fully, and the cleaning effect can be effectively exerted.
Preferably, the top end of the cleaning mop is fixedly connected with a lifting column, and the lifting column can adjust the height of the cleaning mop to adapt to a complex working environment.
Preferably, the top fixedly connected with lift post and the fixed column of cleaning blade, the fixed column realizes cleaning blade's fixed, and the lift post possesses the function of adjustment cleaning blade height.
Preferably, the leftmost end fixedly connected with bull stick of top cap, the upset function of top cap can be realized to the bull stick, ensures that the top cap can easily open.
Preferably, fresh water district and clean water district all fixed mounting have inlet pipeline and one-level water pipe, and inlet pipeline ensures to lead to the inside water injection in fresh water district and clean water district, and the one-level water pipe can be with fresh water district or the inside water of clean water district leading-in to the transfer pump.
Preferably, the bottom of the cleaning spray head is fixedly provided with at least seven spray pipes, and the length of each spray pipe is inconsistent, so that the spraying range of the cleaning spray head is expanded to the greatest extent.
(II) advantageous effects
Compared with the prior art, the invention provides the sweeper with the cleaning device replaced according to the type of garbage in a cleaning place, which has the following beneficial effects:
1. this change cleaning device's motor sweeper according to kind of cleaning place rubbish, when cleaning the many road conditions of dust rubbish, open the dust absorption pump, the dust absorption pump can produce very big ground wind-force, because the dust absorption mouth is equipped with to the dust absorption pump bottom, the dust absorption mouth can restrict wind-force in this region of dust absorption mouth, all rubbish that passes through dust absorption mouth department all can be sucked by the dust absorption pump and deposit waiting to handle in rubbish storage area through the transfer pipeline commentaries on classics, open the inside fresh water of transfer water pump extraction fresh water district at last and spray ground, and utilize clean mop to accomplish the final work that cleans with the earth's surface cleaning once.
2. This sweeper who changes cleaning device according to the kind of cleaning place rubbish, when cleaning the more region of stickness material, open the dust absorption pump, the height that reduces clean scraper blade through the lift post simultaneously makes its contact earth's surface, the stickness material that clean scraper blade can shovel the earth's surface makes it break away from ground, become earth's surface rubbish stickness material and can be absorbed by the dust absorption pump afterwards and transfer to rubbish and deposit waiting to handle in the district, open the inside fresh water of transfer water pump extraction fresh water district at last and spray ground, and utilize clean mop to accomplish the work of ending that cleans with the earth's surface once.
3. This change cleaning device's motor sweeper according to kind of cleaning place rubbish, when cleaning oily ground, start the inside clean water of transfer water pump extraction clean water district and spout through clean shower nozzle and sweep subaerially, the inside powerful sanitizer that thoughtlessly of clean water can effectual clean oil stain, can be cleared up by clean mop after the oil stain emerges, because the difficult clearance on oily ground, so the same place needs many clearance several times, the mode that switches the transfer water pump after preliminary clearance is accomplished makes its fresh water of extraction fresh water district inside spray ground, and utilize clean mop to accomplish the final phase work that cleans with the earth's surface once.
4. This change cleaning device's motor sweeper according to kind of cleaning place rubbish, cleaning shower nozzle, cleaning mop and cleaning scraper blade department all fixed mounting have the lift post, and the lift post can adjust cleaning shower nozzle, cleaning mop and cleaning scraper blade's height change its working range, increases cleaning work's controllability.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a side cross-sectional view of the vehicle body of the present inventive structure;
FIG. 3 is a top view of a water storage tank of the present invention;
FIG. 4 is a schematic view of the front and side surfaces of the cleaning nozzle of the present invention.
In the figure: the device comprises a vehicle body 1, protection plates 2, an image recognition detection device 3, a water storage tank 4, an inlet pipeline 5, a partition plate 6, a fresh water area 7, a clean water area 8, a rotating motor 9, a rotating shaft 10, a stirring rod 11, a primary water pipe 12, a transfer water pump 13, a secondary water pipe 14, a lifting column 15, a cleaning spray head 16, a fixed column 17, a cleaning mop 18, a cleaning scraper 19, a dust suction pump 20, a dust suction port 21, a transfer pipeline 22, a garbage storage area 23 and a top cover 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a sweeper capable of replacing a cleaning device according to the type of garbage in a cleaning place comprises a sweeper body main body 1, wherein the sweeper body main body 1 comprises a series of sweeper parts such as wheels, a vehicle seat and a steering wheel, a protection plate 2 is fixedly connected to the bottom of the sweeper body main body 1, the protection plate 2 can protect an image recognition detection device 3 to a certain extent, the image recognition detection device 3 is fixedly connected to the bottom of the sweeper body main body 1, the image recognition detection device 3 can intelligently recognize the type of surface garbage and send information to an operator, a water storage tank 4 is fixedly connected to the top of the sweeper body main body 1, an inlet pipeline 5 is fixedly connected to the top of the water storage tank 4, water or a cleaning agent enters the inside of the water storage tank 4 through the inlet pipeline 5, a partition plate 6 is fixedly connected to the inside of the water storage tank 4, the partition plate 6 divides the water storage tank 4 into a fresh, the fresh water area 7 is arranged in the water storage tank 4, common water is stored in the fresh water area 7, the clean water area 8 is arranged in the water storage tank 4, mixed liquid of detergent and water is stored in the clean water area 8, an inlet pipeline 5 and a first-level water pipe 12 are fixedly arranged in the fresh water area 7 and the clean water area 8, the inlet pipeline 5 ensures that water can be injected into the fresh water area 7 and the clean water area 8, the first-level water pipe 12 can guide the water in the fresh water area 7 or the clean water area 8 into a transfer water pump 13, a rotating motor 9 is fixedly connected in the clean water area 8, the rotating motor 9 provides power for stirring work in the clean water area 8, a rotating shaft 10 is fixedly connected to the bottom of the rotating motor 9, stirring rods 11 are fixedly connected to the outer surface of the rotating shaft 10, at least 8 stirring rods 11 are fixedly arranged on the rotating shaft 10 step by step, and the added detergent can be stirred sufficiently, effectively exert clean effect, the inside fixedly connected with one-level water pipe 12 of water storage tank 4, one end fixedly connected with transfer water pump 13 that water storage tank 4 was kept away from to one-level water pipe 12, and transfer water pump 13 can take out the liquid in fresh water district 7 or clean water district 8 and discharge out through second grade water pipe 14.
The left side of the transfer water pump 13 is fixedly connected with a secondary water pipe 14, the inside of the secondary water pipe 14 is fixedly connected with a lifting column 15, the lifting column 15 has a lifting function and can be adjusted in height to change the working radius, the bottom end of the lifting column 15 is fixedly connected with a cleaning nozzle 16, the bottom of the cleaning nozzle 16 is fixedly provided with at least seven nozzles, the lengths of all the nozzles are inconsistent, the spraying range of the cleaning nozzle 16 is enlarged to the maximum extent, the bottom of the vehicle body main body 1 is fixedly connected with a fixing column 17, the fixing column 17 realizes the fixing of a partial structure, the bottom of the fixing column 17 is fixedly connected with a cleaning mop 18, the top end of the cleaning mop 18 is fixedly connected with the lifting column 15, the lifting column 15 can adjust the height of the cleaning mop 18 to adapt to a complex working environment, the cleaning mop 18 can effectively clean the ground, and the, the top end of the cleaning scraper 19 is fixedly connected with a lifting column 15 and a fixed column 17, the fixed column 17 realizes the fixation of the cleaning scraper 19, the lifting column 15 has the function of adjusting the height of the cleaning scraper 19, when sticky substances such as chewing gum exist on the surface, the cleaning scraper 19 can effectively clean the sticky substances, a dust suction pump 20 is fixedly connected inside the vehicle body main body 1 and can generate great ground wind force to suck the ground surface substances, a dust suction port 21 is fixedly connected to the bottom of the dust suction pump 20 and is an absorption pipeline of the dust suction pump 20, a transfer pipeline 22 is fixedly connected to the right side of the dust suction pump 20, the garbage enters a garbage storage area 23 through the transfer pipeline 22, a garbage storage area 23 is fixedly connected to one end of the transfer pipeline 22 far away from the dust suction pump 20, the garbage sucked by the dust suction pump 20 is temporarily stored inside the garbage storage area 23, a top cover 24 is fixedly connected to the top, the turning rod can realize the turning function of the top cover 24, and the top cover 24 can be opened easily.
The working principle is that fresh water is injected into a fresh water area 7 and a clean water area 8 through an inlet pipeline 5, a proper amount of cleaning agent is added into the clean water area 8, a rotating motor 9 is started, the rotating motor 9 drives a stirring rod 11 to start stirring work through a rotating shaft 10, after the cleaning agent is fully mixed, the rotating motor 9 is closed and a sweeper is started, an image recognition detection device 3 at the bottom of the sweeper can recognize road cleaning conditions and send information to an operator, if the road cleaning conditions are normal ground, a dust suction pump 20 is started, dust and garbage on the ground surface can be sucked into the dust suction pump 20 through a dust suction port 21 by strong wind power generated by the dust suction pump 20 and are transferred and temporarily stored in a garbage storage area 23 through a transfer pipeline 22, a top cover 24 at the top end of the garbage storage area 23 is opened to clean the stored garbage, the cleaning work of the normal ground surface is completed, and if the ground surface has more viscous substances such as, when the dust suction pump 20 is started, the height of the cleaning scraper 19 is changed through the lifting column 15 to enable the cleaning scraper 19 to be in contact with the ground surface, the cleaning scraper 19 can scoop up viscous substances to be separated from the ground surface, then the viscous substances are sucked by the dust suction pump 20 and stored in the garbage storage area 23 to complete the cleaning work of the ground containing the viscous substances, if the ground is oily, the transfer water pump 13 is started, the transfer water pump 13 can pump cleaning water in the cleaning water area 8 through the primary water pipe 12 and transmit the cleaning water to the cleaning spray head 16 through the secondary water pipe 14, the cleaning spray head 16 can spray the cleaning water to the ground, then the cleaning mop 18 can strongly mop the spraying area, the same section which is difficult to clean on the oily ground surface needs to be cleaned for several times, after the primary cleaning is completed, the mode of the transfer water pump 13 is switched to pump common water in the fresh water area 7 to carry out final cleaning on the ground surface, and finishing the cleaning work of the oily ground.
To sum up, this change cleaning device's motor sweeper according to the kind of cleaning place rubbish, when cleaning the road conditions that dust rubbish is many, open dust pump 20, dust pump 20 can produce very big ground wind-force, because dust absorption port 21 is equipped with in the dust absorption pump 20 bottom, dust absorption port 21 can restrict wind-force in this region of dust absorption port 21, all rubbish that passes through dust absorption port 21 department can all be absorbed by dust pump 20 and through transit pipeline 22 commentaries on classics deposit in rubbish district 23 wait to handle, open transfer pump 13 at last and draw the inside fresh water of fresh water district 7 and spray ground to utilize clean mop 18 to accomplish the work of ending that cleans with the earth's surface once.
This sweeper truck who changes cleaning device according to the kind of cleaning place rubbish, when cleaning the more region of stickness material, open dust absorption pump 20, the height that reduces clean scraper blade 19 simultaneously through lift post 15 makes its contact earth's surface, the stickness material that clean scraper blade 19 can shovel the earth's surface makes it break away from ground, become earth's surface rubbish stickness material and can be absorbed the commentaries on classics deposit to wait to handle in rubbish storage area 23 by dust absorption pump 20 afterwards, open transfer pump 13 at last and extract the inside fresh water of fresh water district 7 and spray ground, and utilize clean mop 18 to accomplish the final work that cleans with the clean one pass of earth's surface.
This sweeper according to change cleaning device's of kind of cleaning place rubbish, when cleaning oily ground, start the clean water of transfer pump 13 extraction clean water district 8 inside and spout through clean shower nozzle 16 and sweep subaerially, clean water inside is thoughtlessly had powerful sanitizer can effectual clean oil stain, can be cleared up by clean mop 18 after the oil stain emerges, because the difficult clearance on oily ground, so same place needs to clear up several times more, switch the fresh water of transfer pump 13 mode after preliminary clearance is accomplished and make its extraction fresh water district 7 inside spray ground, and utilize clean mop 18 to accomplish the final phase of cleaning once with the earth's surface cleaning.
According to the sweeper capable of replacing the sweeping device according to the types of the garbage in the sweeping place, the lifting columns 15 are fixedly arranged at the cleaning spray head 16, the cleaning mop 18 and the cleaning scraper 19, the lifting columns 15 can adjust the heights of the cleaning spray head 16, the cleaning mop 18 and the cleaning scraper 19 to change the working range of the cleaning spray head, and the controllability of cleaning work is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a change cleaning device's motor sweeper according to kind of cleaning place rubbish, includes automobile body main part (1), its characterized in that: the device comprises a vehicle body main body (1), a protection plate (2) is fixedly connected to the bottom of the vehicle body main body (1), an image recognition and detection device (3) is fixedly connected to the bottom of the vehicle body main body (1), a water storage tank (4) is fixedly connected to the top of the vehicle body main body (1), an inlet pipeline (5) is fixedly connected to the top of the water storage tank (4), a partition plate (6) is fixedly connected to the interior of the water storage tank (4), a fresh water area (7) is arranged inside the water storage tank (4), a clean water area (8) is arranged inside the water storage tank (4), a rotating motor (9) is fixedly connected to the interior of the clean water area (8), a rotating shaft (10) is fixedly connected to the bottom of the rotating motor (9), a stirring rod (11) is fixedly connected to the outer side surface of the rotating shaft (10), a primary water pipe (12) is fixedly connected to the interior of the water, left side fixedly connected with second grade water pipe (14) of transfer water pump (13), inside fixedly connected with lift post (15) of second grade water pipe (14), the clean shower nozzle of bottom fixedly connected with (16) of lift post (15), the bottom fixedly connected with fixed column (17) of automobile body main part (1), the clean mop of bottom fixedly connected with (18) of fixed column (17), the clean scraper blade of bottom fixedly connected with (19) of automobile body main part (1), inside fixedly connected with dust absorption pump (20) of automobile body main part (1), the bottom fixedly connected with dust absorption mouth (21) of dust absorption pump (20), the right side fixedly connected with transfer pipeline (22) of dust absorption pump (20), one end fixedly connected with rubbish depositing area (23) of dust absorption pump (20) are kept away from in transfer pipeline (22), the top fixedly connected with top cap (24) of rubbish depositing area (23).
2. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the stirring rods (11) are fixedly provided with at least 8 stirring rods and are arranged on the rotating shaft (10) step by step.
3. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the top end of the cleaning mop (18) is fixedly connected with a lifting column (15).
4. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the top end of the cleaning scraper blade (19) is fixedly connected with a lifting column (15) and a fixing column (17).
5. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the leftmost end of the top cover (24) is fixedly connected with a rotating rod.
6. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the fresh water area (7) and the clean water area (8) are both fixedly provided with an inlet pipeline (5) and a first-level water pipe (12).
7. The sweeper truck for replacing the cleaning device according to the type of the garbage on the cleaning site, which is characterized in that: the bottom of the cleaning spray head (16) is fixedly provided with at least seven spray pipes, and the length of each spray pipe is inconsistent.
CN201911126760.6A 2019-11-18 2019-11-18 Sweeper with sweeping device replaced according to types of garbage in sweeping field Pending CN112813894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911126760.6A CN112813894A (en) 2019-11-18 2019-11-18 Sweeper with sweeping device replaced according to types of garbage in sweeping field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911126760.6A CN112813894A (en) 2019-11-18 2019-11-18 Sweeper with sweeping device replaced according to types of garbage in sweeping field

Publications (1)

Publication Number Publication Date
CN112813894A true CN112813894A (en) 2021-05-18

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Application Number Title Priority Date Filing Date
CN201911126760.6A Pending CN112813894A (en) 2019-11-18 2019-11-18 Sweeper with sweeping device replaced according to types of garbage in sweeping field

Country Status (1)

Country Link
CN (1) CN112813894A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114717999A (en) * 2022-03-30 2022-07-08 劲旅环境科技股份有限公司 Washing and sweeping system with replaceable box body and replacing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114717999A (en) * 2022-03-30 2022-07-08 劲旅环境科技股份有限公司 Washing and sweeping system with replaceable box body and replacing method
CN114717999B (en) * 2022-03-30 2024-03-26 劲旅环境科技股份有限公司 Washing and sweeping system with replaceable box body and replacement method

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Application publication date: 20210518