CN111576530A - Pear is planted and is used irrigation canals and ditches cleaning device - Google Patents
Pear is planted and is used irrigation canals and ditches cleaning device Download PDFInfo
- Publication number
- CN111576530A CN111576530A CN202010417803.2A CN202010417803A CN111576530A CN 111576530 A CN111576530 A CN 111576530A CN 202010417803 A CN202010417803 A CN 202010417803A CN 111576530 A CN111576530 A CN 111576530A
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- fixed
- ditch
- base
- pear tree
- cleaning
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention belongs to the technical field of agricultural machinery, and particularly relates to a ditch cleaning device for pear tree planting, which aims at solving the problem that a mud scraping plate of a mud scraping device arranged in the existing ditch cleaning device is directly deep into the bottom of a ditch and easily damages a scraping plate due to hard objects in the mud scraping process. The invention can overcome the thrust of the compression spring when meeting large dirt blocks in the process of scraping mud, so that the scraper is bounced, and the damage to the scraper and the overturning of the trolley caused by forced forward are avoided.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a ditch cleaning device for pear tree planting.
Background
The drainage ditch refers to a ditch which leads water collected in a side ditch, a catch basin and a low-lying part near a roadbed, a crop field and a house to the roadbed, the crop field and the house field. The design of escape canal is according to drainage system engineering overall arrangement and engineering standard, confirms field escape canal degree of depth and interval to flow, water level, section size and the engineering volume of the escape canal at different levels and building of analysis calculation, present escape canal cleaning work is all artificial clearance universally, and this kind of clearance mode needs operating personnel to regularly go to clear up the escape canal, and clears up comparatively wastes time and energy.
The utility model discloses a house residence drainage ditch cleaning equipment that is disclosed for CN201910843293.2 through retrieval chinese patent number, including unmanned car, be equipped with bilateral symmetry's two axletrees that are used for driving the wheel on the unmanned car, fixed connection has the headstock on the unmanned car, the headstock is equipped with the power chamber, fixedly connected with bin on the power chamber left side terminal surface, be equipped with the storage chamber of opening up in the bin, be equipped with the feeding device who is used for carrying quick lime in the bin. But the clearance mud picture peg that the device set up needs loaded down with trivial details lift picture peg just can carry out the shovel to mud when cleaing away mud to if meet hard thing, then block the push pedal easily in the in-process of advancing.
Disclosure of Invention
The invention provides a ditch cleaning device for pear tree planting, which is based on the technical problem that a mud scraping plate of a mud scraping device arranged in the existing ditch cleaning device directly penetrates into the bottom of a ditch in the mud scraping process and easily damages the scraping plate due to hard objects.
The invention provides a ditch cleaning device for pear tree planting, which comprises a base spanning above a ditch body, wherein the base is of a cuboid structure with a cavity arranged inside, mounting plates are arranged on the upper surface of the base close to four corners, a same conveying frame is arranged between the four mounting plates, supporting rollers distributed at equal intervals are rotatably connected between two side plates of the conveying frame, two driving rollers parallel to each other are rotatably connected between the four mounting plates, a same conveying belt is wound between the two driving rollers, hinged plates are welded on the bottom of the base close to two side edges, a same scraper plate is hinged between the two hinged plates, jacks distributed at equal intervals are formed in the bottom of each scraper plate, return springs are fixed at the bottoms of the jacks, telescopic rods are fixed at the ends of the return springs, which are far away from the bottoms of the slots, and cutters are fixed at the ends of the telescopic rods, which are far away, the lower surface middle part of base is fixed with the guided way that the opening is C shape structure downwards, and sliding connection has the slider in the spout of guided way, the lower surface of slider is provided with two perpendicular risers, and articulates between two perpendicular risers and has same root compression spring, compression spring's bottom mounting is in the side of scraper blade.
As a preferable scheme in the invention, the four mounting plates are rotatably connected with rollers at the side far away from the base and close to the bottom ends, and the same transmission rod is rotatably connected between the bottoms of the two higher mounting plates.
In a preferred embodiment of the present invention, a driven gear is fixed to a lower portion of a circumferential outer wall of the driving rod, the lower portion being close to an end portion of the driving roller, a gear groove is formed in the end portion of the driving roller, and an intermediate gear meshed with the intermediate gear and the driven gear is rotatably connected to a side surface of the mounting plate, the side surface being close to an upper portion of the driven gear.
Preferably, the upper and lower surfaces of the slider are provided with spherical grooves near four corners, and the spherical grooves are embedded with balls.
As a preferable scheme in the invention, a partition board is fixed in the base close to the middle part, the partition board divides the interior of the base into a water storage cavity and a working box, an air inlet pipe is inserted in the top end of the partition board, a one-way air valve is arranged in the middle of the air inlet pipe, and air passing through the one-way air valve flows to the water storage cavity from the working box.
As the preferable scheme in the invention, a clamping ring is fixed at one end of the base close to the working box through a bolt, an air cylinder is clamped in the clamping ring, and the other end of the air inlet pipe is inserted at the bottom end of the air cylinder.
According to the preferable scheme, a square pipe mounting seat is fixed at one end, far away from the scraper, of the bottom end of the base, a C-shaped steel upright is fixed on the side face of the square pipe mounting seat, a T-shaped sliding block is connected in a sliding groove of the C-shaped steel upright in a sliding mode, a fixing plate is fixed at one side, far away from the bottom of the groove, of the T-shaped sliding block, screw holes are formed in the upper surface of the fixing plate, close to the two ends of the fixing plate, an L-shaped spray pipe is connected in each screw hole in a.
As a preferable scheme in the invention, the bottom end of the water storage cavity is inserted with the delivery pipe, and one end of the delivery pipe, which is far away from the base, is inserted at the top end of the L-shaped spray pipe.
As the preferable scheme in the invention, the baffle plates are fixed at the bottom of the C-shaped steel upright column close to the two ends, the same adjusting screw rod is rotatably connected between the two baffle plates, and the middle of the T-shaped sliding block is provided with a screw hole matched with the diameter of the adjusting screw rod.
The beneficial effects of the invention are as follows:
1. this ditch cleaning device is used in pear tree planting, through setting up the scraper blade that articulates between two articulated boards, can slowly scrape away the mud of the bottom of irrigation canals and ditches body with the state of slope when the dolly advances when using, and the cutter of scraper blade bottom can cut stubborn mud piece, the degree of difficulty of striking off has been reduced, and can overcome compression spring's thrust when meetting great dirty piece at the in-process of scraping mud, make the scraper blade bounce, avoid leading to damaging the scraper blade and causing the car turnover of dolly because of advancing by force.
2. This ditch cleaning device for pear tree is planted through the conveying frame that sets up and the conveyer belt of winding at its circumference outer wall to only need let the user step on the top of conveyer belt when can need letting the dolly advance when using, later user's foot backward slip can drive the conveyer belt and slide at the body of roll outer wall of backing roll again, provide drive power for the dolly.
3. This ditch cleaning device for pear tree is planted is the pressure boost of water storage chamber through the inflator that sets up to only need operate the inflator and can increase the atmospheric pressure in the water storage chamber when can need wash the mud that strikes off when using, and then spout the water in the water storage chamber to the mud of ditch body bottom through the shower nozzle, in order to wash it, and rotate L shape spray tube and can wash the mud of corner.
4. This ditch cleaning device for pear tree is planted rotates the adjusting screw who connects in T shape slider upper surface screw through setting up to can adjust the distance between oblique shower nozzle and the ditch bottom through rotating adjusting screw, change and wash the effect.
The device has the advantages that the structure is simple, the device can protectively advance in the mud scraping process, and the phenomenon that the scraper is damaged by stubborn blocks is avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a trench cleaning device for pear tree planting according to the present invention;
FIG. 2 is a schematic view of the overall structure of a ditch cleaning device for pear tree planting according to the present invention;
FIG. 3 is a schematic structural view of a trench cleaning device for pear tree planting according to the present invention;
FIG. 4 is an enlarged schematic structural view of a ditch cleaning device for pear tree planting in FIG. 1;
fig. 5 is an enlarged structural schematic view of a ditch cleaning device for pear tree planting, which is provided by the invention, at the position B in fig. 2.
In the figure: the device comprises a channel body 1, a C-shaped steel upright post, a 3-square tube mounting seat, a cutter 4, a jack 5, a telescopic rod 6, a scraper 7, a compression spring 8, a return spring 9, a shaft rod 10, a hinged plate 11, a base 12, a guide rail 13, a sliding block 1301, a vertical plate 1302, a driven gear 14, an air cylinder 15, a middle gear 16, a driving roller 17, a gear groove 1701, a roller 18, a 1801 transmission rod, a conveying belt 19, a supporting roller 20, a one-way air valve 21, a conveying rack 22, a partition plate 23, a 24 conveying pipe, a 25 fixing plate, a 26T-shaped sliding block, a 27L-shaped spraying pipe.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-5, a ditch cleaning device for pear tree planting comprises a base 12 spanning above a ditch body 1, wherein the base 12 is a cuboid structure with a cavity arranged inside, mounting plates 29 are arranged on the upper surface of the base 12 close to four corners, a same conveying frame 22 is arranged between the four mounting plates 29, supporting rollers 20 distributed at equal intervals are rotatably connected between two side plates of the conveying frame 22, two driving rollers 17 parallel to each other are rotatably connected between the four mounting plates 29, a same conveying belt 19 is wound between the two driving rollers 17, hinged plates 11 are welded on the bottom of the base 12 close to two side edges, a same scraper 7 is hinged between the two hinged plates 11, jacks 5 distributed at equal intervals are formed in the bottom end of the scraper 7, return springs 9 are fixed at the bottoms of the jacks 5, and telescopic rods 6 are fixed at the ends of the return springs 9 far away from the bottoms of the slots, a cutter 4 is fixed at one end of the telescopic rod 6 far away from the return spring 9, a guide rail 13 with a downward opening and a C-shaped structure is fixed at the middle part of the lower surface of the base 12, and a sliding block 1301 is connected in the sliding groove of the guide rail 13 in a sliding way, two vertical plates 1302 are arranged on the lower surface of the sliding block 1301, and the same compression spring 8 is hinged between the two vertical plates 1302, the bottom end of the compression spring 8 is fixed on the side surface of the scraping plate 7, so that the sludge at the bottom of the ditch body 1 can be slowly scraped forwards in an inclined state when the trolley advances in use, and the cutter 4 at the bottom of the scraper 7 can cut stubborn mud blocks, thereby reducing the scraping difficulty, and can overcome the thrust of the compression spring 8 when meeting a larger dirt block in the mud scraping process, the scraper 7 is bounced, and the phenomenon that the scraper 7 is damaged and the trolley is overturned due to forced forward is avoided.
In the invention, the rollers 18 are rotatably connected to the sides of the four mounting plates 29 far away from the base 12 and near the bottom ends, and the same transmission rod 1801 is rotatably connected between the bottoms of the two higher mounting plates 29.
Wherein, the circumference outer wall of transfer line 1801 is fixed with driven gear 14 near the tip below of drive roller 17, the tip of drive roller 17 is provided with gear groove 1701, and the side of mounting panel 29 is close to the top of driven gear 14 and is rotated and be connected with the intermediate gear 16 with intermediate gear 16 and driven gear 14 intermeshing respectively, thereby can only need to let the user step on the top of conveyer belt 19 when needing to let the dolly go forward when using, later user's foot slides backward can drive conveyer belt 19 and slide at the roller body outer wall of backing roll 20, provide drive power for the dolly.
Wherein, the upper and lower surface of slider 1301 is close to four corners department and all opens there is spherical groove, and all inlays in the spherical groove and is equipped with the ball.
Wherein, the inside of base 12 is close to the middle part and is fixed with baffle 23, and baffle 23 divide into water storage chamber and work box with the inside of base 12, and the top of baffle 23 is pegged graft and is had the intake pipe, and the centre of intake pipe is provided with one-way pneumatic valve 21, and the gas through one-way pneumatic valve 21 is by the work box flow direction water storage chamber to can constantly be the increase atmospheric pressure in the water storage chamber.
Wherein, the one end of base 12 near the work box is fixed with the snap ring through the bolt, and has blocked the inflator 15 in the snap ring, and the other end of intake pipe is pegged graft in the bottom of inflator 15.
Wherein, the one end that scraper blade 7 was kept away from to the bottom of base 12 is fixed with square pipe mount pad 3, and the side of square pipe mount pad 3 is fixed with C shaped steel stand 2, sliding connection has T shape slider 26 in C shaped steel stand 2's the spout, one side that T shape slider 26 kept away from the tank bottom is fixed with fixed plate 25, and the upper surface of fixed plate 25 is close to both ends and has all opened the screw, equal spiro union has L shape spray tube 27 in two screws, the bottom of L shape spray tube 27 is provided with oblique shower nozzle.
Wherein, the bottom in water storage chamber is pegged graft and is had conveyer pipe 24, and the one end that conveyer pipe 24 kept away from base 12 is pegged graft on the top of L shape spray tube 27 to only need operate inflator 15 can increase the atmospheric pressure in the water storage chamber when can need washing the mud of scraping off when using, and then spout the mud of ditch groove body 1 bottom with the water in the water storage chamber through the shower nozzle, in order to wash it, and rotate L shape spray tube 27 and can wash the mud of corner.
When the trolley is required to move forwards in use, a user only needs to step on the upper part of the conveyor belt 19, and then the feet of the user slide backwards to drive the conveyor belt 19 to slide on the outer wall of the roller body of the supporting roller 20 so as to provide driving force for the trolley; when the trolley moves forwards, the sludge at the bottom of the ditch body 1 can be slowly pushed forwards in an inclined state, and the cutter 4 at the bottom of the scraper 7 can cut stubborn sludge blocks, so that the scraping difficulty is reduced, and when the device meets a large sludge block in the sludge scraping process, the pushing force of the compression spring 8 can be overcome, so that the scraper 7 is bounced, and the damage to the scraper 7 and the overturning of the trolley caused by forced forward movement are avoided; finally, when the bottom of the ditch body 1 of the scraped sludge part needs to be washed, the air pressure in the water storage cavity can be increased by operating the air cylinder 15, so that water in the water storage cavity is sprayed to the sludge at the bottom of the ditch body 1 through the spray head to wash the sludge, and the sludge at the corner can be washed by rotating the L-shaped spray pipe 27.
Example 2
Referring to fig. 1-3, this embodiment compares with embodiment 1, and still includes that the tank bottom of C shaped steel stand 2 is close to both ends and all is fixed with the baffle, and rotates between two baffles and is connected with same root adjusting screw 28, and open the screw that has the diameter looks adaptation with adjusting screw 28 in the middle of the T slider 26.
The distance between the inclined spray head and the bottom of the ditch is adjusted by rotating the adjusting screw 28, so that the washing effect is changed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a ditch cleaning device for pear tree is planted, includes and strides base (12) in ditch body (1) top, base (12) are the cuboid structure of establishing the cavity in for, and the upper surface of base (12) is close to four corners department and all is provided with mounting panel (29), is provided with same conveying frame (22) between four mounting panels (29), rotate between two curb plates of conveying frame (22) and be connected with backing roll (20) that the equidistance distributes, and rotate between four mounting panels (29) and be connected with two drive rollers (17) that are parallel to each other, two the winding has same root conveyer belt (19) between drive roller (17), the bottom of base (12) is close to both sides edge and has all welded articulated slab (11), its characterized in that, two it has same scraper blade (7) to articulate between articulated slab (11), jack (5) that the equidistance distributes are opened to the bottom of scraper blade, and the bottom of jack (5) all is fixed with reset spring (9), and the one end that reset spring (9) kept away from the tank bottom all is fixed with telescopic link (6), the one end that reset spring (9) were kept away from in telescopic link (6) all is fixed with cutter (4), the lower surface middle part of base (12) is fixed with guided way (13) that the opening is the C shape structure downwards, and sliding connection has slider (1301) in the spout of guided way (13), the lower surface of slider (1301) is provided with two perpendicular risers (1302), and articulates between two perpendicular risers (1302) have same root compression spring (8), and the bottom mounting of compression spring (8) is in the side of scraper blade (7).
2. The device for cleaning the ditches for pear tree planting according to claim 1, wherein the side, far away from the base (12), of each of the four mounting plates (29) is rotatably connected with a roller (18) near the bottom end, and the same transmission rod (1801) is rotatably connected between the bottoms of the two higher mounting plates (29).
3. The ditch cleaning device for pear tree planting according to claim 2, characterized in that a driven gear (14) is fixed below the end part of the peripheral outer wall of the transmission rod (1801) close to the driving roller (17), a gear groove (1701) is formed at the end part of the driving roller (17), and an intermediate gear (16) which is meshed with the intermediate gear (16) and the driven gear (14) respectively is rotatably connected to the side surface of the mounting plate (29) close to the upper part of the driven gear (14).
4. The device for cleaning the ditch for pear tree planting according to claim 1, characterized in that the upper and lower surfaces of the sliding block (1301) are provided with spherical grooves near four corners, and the spherical grooves are embedded with balls.
5. The device for cleaning the ditch for pear tree planting according to claim 1, characterized in that a partition plate (23) is fixed inside the base (12) near the middle, the partition plate (23) divides the inside of the base (12) into a water storage cavity and a working box, an air inlet pipe is inserted into the top end of the partition plate (23), a one-way air valve (21) is arranged in the middle of the air inlet pipe, and air passing through the one-way air valve (21) flows from the working box to the water storage cavity.
6. The device for cleaning the ditch for pear tree planting according to claim 5, wherein a snap ring is fixed to one end of the base (12) close to the working box through a bolt, an air cylinder (15) is connected to the snap ring in a snap-in mode, and the other end of the air inlet pipe is inserted into the bottom end of the air cylinder (15).
7. The device for cleaning the ditch for pear tree planting according to claim 6, characterized in that, the one end that scraper blade (7) was kept away from to the bottom of base (12) is fixed with square pipe mount pad (3), and the side of square pipe mount pad (3) is fixed with C shaped steel stand (2), sliding connection has T shape slider (26) in the spout of C shaped steel stand (2), one side that the tank bottom was kept away from in T shape slider (26) is fixed with fixed plate (25), and the upper surface of fixed plate (25) is close to both ends and all opens the screw, equal spiro union has L shape spray tube (27) in two screws, the bottom of L shape spray tube (27) is provided with oblique shower nozzle.
8. The device for cleaning the ditch for pear tree planting according to claim 7, characterized in that a delivery pipe (24) is inserted at the bottom end of the water storage cavity, and one end of the delivery pipe (24) far away from the base (12) is inserted at the top end of the L-shaped spray pipe (27).
9. The device for cleaning the ditch for pear tree planting according to claim 8, characterized in that baffles are fixed at the bottom of the C-shaped steel upright column (2) near both ends, the same adjusting screw (28) is rotatably connected between the two baffles, and a screw hole matched with the diameter of the adjusting screw (28) is arranged in the middle of the T-shaped sliding block (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417803.2A CN111576530A (en) | 2020-05-18 | 2020-05-18 | Pear is planted and is used irrigation canals and ditches cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417803.2A CN111576530A (en) | 2020-05-18 | 2020-05-18 | Pear is planted and is used irrigation canals and ditches cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111576530A true CN111576530A (en) | 2020-08-25 |
Family
ID=72119019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010417803.2A Withdrawn CN111576530A (en) | 2020-05-18 | 2020-05-18 | Pear is planted and is used irrigation canals and ditches cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111576530A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112212A (en) * | 2020-09-02 | 2020-12-22 | 高布仁巴雅尔 | Ditch moss cleaning device for hydraulic engineering |
| CN112205224A (en) * | 2020-11-16 | 2021-01-12 | 澧县绿之源生态农业科技发展有限公司 | Agricultural vegetable plants irrigation equipment for big-arch shelter |
| CN112575840A (en) * | 2021-01-06 | 2021-03-30 | 王彩平 | Ditch cleaning device in gardens |
| CN113914398A (en) * | 2021-09-28 | 2022-01-11 | 杨朝亮 | Hydraulic engineering desilting device |
| CN114751194A (en) * | 2022-03-24 | 2022-07-15 | 河北养元智汇饮品股份有限公司 | Walnut kernel soaking and conveying system |
| CN115156144A (en) * | 2022-06-14 | 2022-10-11 | 长沙飞山奇建材有限公司 | Aerated concrete block waste material clearance system |
| CN115213138A (en) * | 2022-07-16 | 2022-10-21 | 昆明理工大学 | Building new material pretreatment equipment |
-
2020
- 2020-05-18 CN CN202010417803.2A patent/CN111576530A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112212A (en) * | 2020-09-02 | 2020-12-22 | 高布仁巴雅尔 | Ditch moss cleaning device for hydraulic engineering |
| CN112112212B (en) * | 2020-09-02 | 2022-10-11 | 高布仁巴雅尔 | Ditch moss cleaning device for hydraulic engineering |
| CN112205224A (en) * | 2020-11-16 | 2021-01-12 | 澧县绿之源生态农业科技发展有限公司 | Agricultural vegetable plants irrigation equipment for big-arch shelter |
| CN112575840A (en) * | 2021-01-06 | 2021-03-30 | 王彩平 | Ditch cleaning device in gardens |
| CN113914398A (en) * | 2021-09-28 | 2022-01-11 | 杨朝亮 | Hydraulic engineering desilting device |
| CN113914398B (en) * | 2021-09-28 | 2023-01-13 | 杨朝亮 | Hydraulic engineering sediment removal device |
| CN114751194A (en) * | 2022-03-24 | 2022-07-15 | 河北养元智汇饮品股份有限公司 | Walnut kernel soaking and conveying system |
| CN114751194B (en) * | 2022-03-24 | 2023-09-26 | 河北养元智汇饮品股份有限公司 | Soaking conveying system of walnut kernels |
| CN115156144A (en) * | 2022-06-14 | 2022-10-11 | 长沙飞山奇建材有限公司 | Aerated concrete block waste material clearance system |
| CN115156144B (en) * | 2022-06-14 | 2024-03-19 | 长沙飞山奇建材有限公司 | Aerated concrete block waste material clearance system |
| CN115213138A (en) * | 2022-07-16 | 2022-10-21 | 昆明理工大学 | Building new material pretreatment equipment |
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Application publication date: 20200825 |