CN112030688A - Construction protection is concrete cleaning device for ground - Google Patents
Construction protection is concrete cleaning device for ground Download PDFInfo
- Publication number
- CN112030688A CN112030688A CN202010921952.2A CN202010921952A CN112030688A CN 112030688 A CN112030688 A CN 112030688A CN 202010921952 A CN202010921952 A CN 202010921952A CN 112030688 A CN112030688 A CN 112030688A
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- Prior art keywords
- frame
- cleaning device
- arc
- motor
- construction protection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a concrete cleaning device for building construction protection ground in the field of construction equipment, which comprises an arc cover and a frame, wherein one end of the frame is hinged with the arc cover, a hydraulic rod is arranged between the upper side center of the arc cover and the side wall center of the frame, and a crushing motor is arranged on one side wall of the arc cover. So that the device meets the actual use requirements.
Description
Technical Field
The invention relates to the field of building construction equipment, in particular to a concrete cleaning device for protecting the ground during building construction.
Background
In-process of construction, need transport and pour a large amount of concrete, the concrete can drop at the in-process of carrying and condense subaerial, and the concrete that condenses into the piece can cause the damage to ground, consequently, need use corresponding concrete cleaning device to clear up subaerial concrete for ground is effectively protected.
Present protection concrete cleaning device for ground when using, the quartering hammer through fixed angle strikes the concrete piece breakage mostly, the quartering hammer is when meetting great bulky concrete piece, the quartering hammer operation face can not obtain effective contact with the concrete, influence the crushing effect of quartering hammer, and simultaneously, current device is when using, lack the device that effectively clears up to attached to subaerial little volume concrete bulge layer, make the device can not satisfy actual user demand to the clearance effect of concrete, therefore, the technical personnel in the field provide a building construction protection concrete cleaning device for ground, in order to solve the problem that proposes among the above-mentioned background art.
Disclosure of Invention
The invention aims to provide a concrete cleaning device for protecting the ground in building construction, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a concrete cleaning device for protecting ground in building construction comprises an arc cover and a frame, wherein one end of the frame is hinged with the arc cover, a hydraulic rod is arranged between the center of the upper side of the arc cover and the center of the side wall of the frame, a crushing motor is arranged on one side wall of the arc cover, one end of the crushing motor is provided with a rotating shaft, crushing hammers are arranged at equal intervals on the outer circumference of the rotating shaft, nozzles are arranged at the lower part of the inner side wall of the arc cover, the four corners of the lower part of the frame are connected with wheels through bearings, a top cover is hinged with the upper side of the frame, the center of the upper side of the top cover is connected with a handle through screws, a push rod is arranged on one side of the frame away from the arc cover, an adjusting panel is arranged on one side wall of the top cover, shoveling hoppers are arranged on the outer side of the rubber belt at equal intervals, a feeding motor is arranged at one end of the driving roller, a collecting hopper is arranged on the lower oblique side of the upper end of the rubber belt, a chute frame is arranged on one side of the collecting hopper, which is far away from the rubber belt, a polishing motor is connected to the center of the inner side of the chute frame in a sliding manner, an electric push rod is arranged at the center of the upper side of the polishing motor, a steel brush disc is arranged on the lower side of the polishing motor, a storage battery is arranged on one side of the chute frame, which is far away from the collecting hopper, the center of the lower side of the storage battery is provided with a laser range finder, damping rods are arranged at two ends of the driven roller, the damping rods can enable the driven roller to be adjusted up and down, further enable the shoveling hoppers on the rubber belt to clear broken concrete blocks, the laser range finder can measure the, the smoothness of the ground is ensured.
As a further scheme of the invention: the damping rod upper end with the frame passes through the screwed connection, the damping rod lower extreme pass through the sliding block with the driven voller end connection, the driven voller passes through the bearing with the sliding block center and is connected, the sliding block with inside wall sliding connection of frame, the driven voller both ends can pass through the sliding block and slide from top to bottom in the spout of inside wall of frame, the damping rod can prevent the sliding block and slide from top to bottom, make the driven voller with between the drive roll can with rubber belt props tightly, guarantees the shovel material effect of shovel hopper.
As a further scheme of the invention: the drive roll one end with the pay-off motor passes through the coupling joint, the drive roll other end with the frame passes through the bearing and connects, the drive roll with the driven voller passes through the rubber belt is connected, the shovel hopper with the rubber belt passes through rivet connection, the pay-off motor can drive the drive roll is stabilized to be rotated, and then makes it rotates to reach the rubber belt is stabilized, makes the shovel hopper can shovel away the bold concrete piece after the breakage.
As a further scheme of the invention: the collecting hopper with the frame block is connected, the spout frame with the frame welding, the spout frame with the screw connection is passed through to electric putter upper end, the collecting hopper can be collected the concrete piece that the shovel hopper carried, the spout frame can make grinding motor slides from top to bottom more stably, and then makes the distance of steel brush dish to ground obtains stable regulation, guarantees the effect of polishing of steel brush dish to ground.
As a further scheme of the invention: the electric putter lower extreme with grinding motor passes through the screw connection, grinding motor with the steel brush dish passes through the connecting axle and connects, the battery with the frame passes through the draw-in groove and connects, grinding motor does the rotation of steel brush dish provides power, guarantees the steel brush dish can not be brushed the concrete that ground was not broken and swept, guarantees the cleaning effect of device to ground, the battery provides electric power for the operation of device.
As a further scheme of the invention: laser range finder with frame bottom passes through the screw connection, the laser range finder symmetry sets up frame bottom parallel with the direction of wheel pivot, the push rod with the frame passes through the screw connection, the laser range finder can accurate measurement the frame is to the distance on ground, and then makes electric putter can drive grinding motor carries out accurate altitude mixture control, and then makes the distance between steel brush dish to ground obtains accurate regulation.
As a further scheme of the invention: adjusting panel with the top cap passes through the draw-in groove to be connected, the top cap is close to hydraulic stem one side with the frame draw-in groove is connected, the hydraulic stem lower extreme with the arc lid is articulated, the top cap can be right the frame upside covers the protection, avoids concrete block in the shovel hopper splashes, and avoids the battery receives the damage, the hydraulic stem can drive the arc lid rotates the regulation, and then makes the arc lid is inboard the distance between quartering hammer to the ground is adjusted for the device can carry out broken handle to concrete block of co-altitude not.
As a further scheme of the invention: the hydraulic stem upper end with the frame is articulated, arc lid side lower extreme with frame sliding connection, broken motor with the arc lid passes through the screw connection, the hydraulic stem does the rotation of arc lid provides power, broken motor does the rotation of quartering hammer provides power, the arc lid can be avoided the concrete fragment injury operating personnel that the quartering hammer took up.
As a further scheme of the invention: rotation axis one end with broken motor key-type connection, the rotation axis with the quartering hammer welding, the rotation axis other end with the arc lid passes through the bearing and connects, the quartering hammer can be changed after damaging, the rotation axis with weld fixture is carried out through the welding plate between the quartering hammer.
As a further scheme of the invention: the material of frame is for casting the steel, the material of top cap is the stainless steel, the top cap can be right the frame upside covers the protection.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arc-shaped cover, the hydraulic rod, the crushing motor, the rotating shaft and the crushing hammer, the working surface of the crushing hammer is effectively contacted with concrete, so that the crushing effect of the crushing hammer on concrete blocks is ensured, and the problem that the crushing effect of the crushing hammer is influenced because the working surface of the crushing hammer is not effectively contacted with the concrete when the existing concrete cleaning device for protecting the ground is used and the concrete blocks are mostly impacted and crushed by the crushing hammer with a fixed angle is solved.
2. According to the device, the device can automatically measure the distance between the ground and automatically adjust the distance between the steel brush disc and the ground through the arranged chute frame, the electric push rod, the grinding motor, the steel brush disc and the laser range finder, so that the rotating steel brush disc can effectively clean the small-volume concrete raised layer attached to the ground, the device meets the actual use requirement, and the problem that the device cannot meet the actual use requirement due to the lack of the device for effectively cleaning the small-volume concrete raised layer attached to the ground when the existing device is used is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side cross-sectional view of the arcuate cover of the present invention;
FIG. 3 is a right side cross-sectional view of the frame of the present invention;
FIG. 4 is a schematic view of the structure of the collecting hopper of the present invention.
In the figure: 1. a top cover; 2. a handle; 3. a push rod; 4. a hydraulic lever; 5. an arc-shaped cover; 6. a crushing motor; 7. a wheel; 8. a frame; 9. a rotating shaft; 10. a breaking hammer; 11. a nozzle; 12. shoveling a hopper; 13. a rubber belt; 14. a damping lever; 15. a feeding motor; 16. a driven roller; 17. a drive roll; 18. a collection hopper; 19. a steel brush disc; 20. a laser range finder; 21. an electric push rod; 22. polishing the motor; 23. a chute frame; 24. an adjustment panel; 25. and (4) a storage battery.
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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1-4, in the embodiment of the invention, a concrete cleaning device for protecting ground in building construction comprises an arc cover 5 and a frame 8, wherein one end of the frame 8 is hinged with the arc cover 5, a hydraulic rod 4 is arranged between the center of the upper side of the arc cover 5 and the center of the side wall of the frame 8, one side wall of the arc cover 5 is provided with a crushing motor 6, one end of the crushing motor 6 is provided with a rotating shaft 9, crushing hammers 10 are arranged at equal intervals on the outer circumference of the rotating shaft 9, the lower part of the inner side wall of the arc cover 5 is provided with a nozzle 11, four corners of the lower part of the frame 8 are connected with wheels 7 through bearings, the upper side of the frame 8 is hinged with a top cover 1, the center of the upper side of the top cover 1 is connected with a lifting handle 2 through screws, one side of the frame 8 far away from, the rubber belt 13 is sleeved on the outer sides of the driving roller 17 and the driven roller 16, the shoveling hoppers 12 are arranged on the outer sides of the rubber belt 13 at equal intervals, the feeding motor 15 is arranged at one end of the driving roller 17, the collecting hopper 18 is arranged on the oblique lower side of the upper end of the rubber belt 13, the chute frame 23 is arranged on the side, away from the rubber belt 13, of the collecting hopper 18, the polishing motor 22 is connected to the center of the inner side of the chute frame 23 in a sliding mode, an electric push rod 21 is arranged in the center of the upper side of the polishing motor 22, a steel brush disc 19 is arranged on the lower side of the polishing motor 22, a storage battery 25 is arranged on the side, away from the.
The upper end of the damping rod 14 is connected with the frame 8 through a screw, the lower end of the damping rod 14 is connected with the end of the driven roller 16 through a sliding block, the driven roller 16 is connected with the center of the sliding block through a bearing, and the sliding block is connected with the inner side wall of the frame 8 in a sliding manner; two ends of the driven roller 16 can slide up and down in a sliding groove in the inner side wall of the frame 8 through a sliding block, the damping rod 14 can prevent the sliding block from sliding up and down, so that the rubber belt 13 can be tightly supported between the driven roller 16 and the driving roller 17, the shoveling effect of the shoveling hopper 12 is ensured, one end of the driving roller 17 is connected with the feeding motor 15 through a coupler, the other end of the driving roller 17 is connected with the frame 8 through a bearing, the driving roller 17 is connected with the driven roller 16 through the rubber belt 13, and the shoveling hopper 12 is connected with the rubber belt 13 through a rivet; the feeding motor 15 can drive the driving roller 17 to stably rotate, so that the rubber belt 13 stably rotates, the shoveling hopper 12 can shovel away the crushed large concrete blocks, the collecting hopper 18 is connected with the frame 8 in a clamping manner, the chute frame 23 is welded with the frame 8, and the chute frame 23 is connected with the upper end of the electric push rod 21 through a screw; the collecting hopper 18 can collect concrete blocks conveyed by the shovel hopper 12, the sliding groove frame 23 can enable the polishing motor 22 to slide up and down more stably, further the distance from the steel brush disc 19 to the ground is adjusted stably, the polishing effect of the steel brush disc 19 on the ground is guaranteed, the lower end of the electric push rod 21 is connected with the polishing motor 22 through screws, the polishing motor 22 is connected with the steel brush disc 19 through a connecting shaft, and the storage battery 25 is connected with the frame 8 through a clamping groove; grinding motor 22 provides power for the rotation of steel brush dish 19, guarantees that steel brush dish 19 can be brushed the concrete that ground has not been arrived by the breakage and sweeps, guarantees the cleaning effect of device to ground, and battery 25 provides electric power for the operation of device.
The laser range finder 20 is connected with the bottom of the frame 8 through a screw, the laser range finder 20 is symmetrically arranged at the bottom of the frame 8 in a direction parallel to the rotating shaft of the wheel 7, and the push rod 3 is connected with the frame 8 through a screw; the laser range finder 20 can accurately measure the distance from the frame 8 to the ground, so that the electric push rod 21 can drive the polishing motor 22 to perform accurate height adjustment, the distance from the steel brush disc 19 to the ground is accurately adjusted, the adjusting panel 24 is connected with the top cover 1 through a clamping groove, one side, close to the hydraulic rod 4, of the top cover 1 is connected with the clamping groove of the frame 8, and the lower end of the hydraulic rod 4 is hinged with the arc-shaped cover 5; the top cover 1 can cover and protect the upper side of the frame 8, concrete blocks in the shovel hopper 12 are prevented from splashing, the storage battery 25 is prevented from being damaged, the hydraulic rod 4 can drive the arc-shaped cover 5 to rotate and adjust, further, the distance between the breaking hammer 10 on the inner side of the arc-shaped cover 5 and the ground is adjusted, the device can break concrete blocks with different heights, the upper end of the hydraulic rod 4 is hinged with the frame 8, the lower end of the side edge of the arc-shaped cover 5 is in sliding connection with the frame 8, and the breaking motor 6 is connected with the arc-shaped cover 5 through screws; the hydraulic rod 4 provides power for the rotation of the arc-shaped cover 5, the crushing motor 6 provides power for the rotation of the crushing hammer 10, the arc-shaped cover 5 can prevent concrete fragments brought up by the crushing hammer 10 from injuring operators, one end of the rotating shaft 9 is in key connection with the crushing motor 6, the rotating shaft 9 is welded with the crushing hammer 10, and the other end of the rotating shaft 9 is connected with the arc-shaped cover 5 through a bearing; the breaking hammer 10 can be replaced after being damaged, the rotating shaft 9 and the breaking hammer 10 are welded and fixed through a welding plate, the frame 8 is made of cast steel, the top cover 1 is made of stainless steel, and the top cover 1 can cover and protect the upper side of the frame 8.
The working principle of the invention is as follows: an operator holds the push rod 3 by hand, adjusts the device by the adjusting panel 24, so that the hydraulic rod 4 can drive the arc-shaped cover 5 to rotate around the frame 8, further adjusts the contact area between the working surface of the breaking hammer 10 inside the arc-shaped cover 5 and the concrete block, further enables the breaking hammer 10 to effectively break the concrete block with larger volume, the breaking motor 6 drives the rotating shaft 9 and the breaking hammer 10 to rapidly rotate, further enables the device to effectively break and process the concrete block, the broken concrete block is gathered at the bottom side of the frame 8, the feeding motor 15 drives the driving roller 17 to clockwise rotate, further enables the rubber belt 13 to rotate, so that the shovel hopper 12 outside the rubber belt 13 can carry out shovel material transportation on the gathered concrete block, the concrete block in the shovel hopper 12 can be conveyed to the collecting hopper 18 to be collected in a centralized manner, and after the collection is full, can open top cap 1 through handle 2, then take out collecting hopper 18, and fall the concrete piece, laser range finder 20 can the accurate distance between 8 bottoms of measurement frame to the ground, and adjust from top to bottom along spout frame 23 through electric putter 21 drive polish motor 22, and then make steel brush dish 19 to the distance on ground adjusted, make subaerial concrete protruding layer that is not effectively broken can be polished off, guarantee the cleaning performance of device.
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 (10)
1. The utility model provides a construction protection is concrete cleaning device for ground, includes arc lid (5) and frame (8), its characterized in that: the frame is characterized in that one end of the frame (8) is hinged with the arc-shaped cover (5), a hydraulic rod (4) is arranged between the center of the upper side of the arc-shaped cover (5) and the center of the side wall of the frame (8), a crushing motor (6) is arranged on one side wall of the arc-shaped cover (5), a rotating shaft (9) is arranged at one end of the crushing motor (6), crushing hammers (10) are arranged at equal intervals on the outer circumference of the rotating shaft (9), nozzles (11) are arranged on the lower portion of the inner side wall of the arc-shaped cover (5), the four corners of the lower portion of the frame (8) are connected with wheels (7) through bearings, a top cover (1) is hinged on the upper side of the frame (8), a handle (2) is connected at the center of the upper side of the top cover (1) through screws, a, the automatic polishing machine is characterized in that a driven roller (16) is arranged on the inner bottom side of the frame (8), a driving roller (17) is arranged on the oblique upper side of the driven roller (16), a rubber belt (13) is sleeved on the driving roller (17) and the outer side of the driven roller (16), shoveling hoppers (12) are arranged on the outer side of the rubber belt (13) at equal intervals, a feeding motor (15) is arranged at one end of the driving roller (17), a collecting hopper (18) is arranged on the oblique lower side of the upper end of the rubber belt (13), a chute frame (23) is arranged on one side, far away from the rubber belt (13), of the collecting hopper (18), a polishing motor (22) is connected to the inner side center of the chute frame (23) in a sliding mode, an electric push rod (21) is arranged at the center of the upper side of the polishing motor (22), a steel brush disc (19) is arranged on the, the laser range finder (20) is arranged in the center of the lower side of the storage battery (25), and damping rods (14) are arranged at two ends of the driven roller (16).
2. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the upper end of the damping rod (14) is connected with the frame (8) through a screw, the lower end of the damping rod (14) is connected with the end of the driven roller (16) through a sliding block, the center of the driven roller (16) is connected with the center of the sliding block through a bearing, and the sliding block is connected with the inner side wall of the frame (8) in a sliding manner.
3. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: drive roll (17) one end with pay-off motor (15) pass through the coupling joint, drive roll (17) other end with frame (8) pass through the bearing and connect, drive roll (17) with driven voller (16) pass through rubber belt (13) are connected, shovel hopper (12) with rubber belt (13) pass through rivet connection.
4. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the material collecting hopper (18) is connected with the frame (8) in a clamping mode, the chute frame (23) is welded with the frame (8), and the chute frame (23) is connected with the upper end of the electric push rod (21) through a screw.
5. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the lower end of the electric push rod (21) is connected with the grinding motor (22) through a screw, the grinding motor (22) is connected with the steel brush disc (19) through a connecting shaft, and the storage battery (25) is connected with the frame (8) through a clamping groove.
6. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the laser range finder (20) is connected with the bottom of the frame (8) through screws, the laser range finder (20) is symmetrically arranged in the direction parallel to the bottom of the frame (8) and along the rotating shaft of the wheel (7), and the push rod (3) is connected with the frame (8) through screws.
7. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the adjusting panel (24) is connected with the top cover (1) through a clamping groove, one side, close to the hydraulic rod (4), of the top cover (1) is connected with the clamping groove of the frame (8), and the lower end of the hydraulic rod (4) is hinged to the arc-shaped cover (5).
8. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the upper end of the hydraulic rod (4) is hinged to the frame (8), the lower end of the side edge of the arc-shaped cover (5) is connected with the frame (8) in a sliding mode, and the crushing motor (6) is connected with the arc-shaped cover (5) through screws.
9. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: rotation axis (9) one end with broken motor (6) key-type connection, rotation axis (9) with quartering hammer (10) welding, the rotation axis (9) other end with arc lid (5) are connected through the bearing.
10. The concrete cleaning device for the building construction protection ground as claimed in claim 1, wherein: the frame (8) is made of cast steel, and the top cover (1) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921952.2A CN112030688A (en) | 2020-09-04 | 2020-09-04 | Construction protection is concrete cleaning device for ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921952.2A CN112030688A (en) | 2020-09-04 | 2020-09-04 | Construction protection is concrete cleaning device for ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112030688A true CN112030688A (en) | 2020-12-04 |
Family
ID=73592115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010921952.2A Withdrawn CN112030688A (en) | 2020-09-04 | 2020-09-04 | Construction protection is concrete cleaning device for ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112030688A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114522919A (en) * | 2021-12-31 | 2022-05-24 | 龙德建设有限公司 | Interior decoration engineering intelligent management device |
| CN117926740A (en) * | 2024-02-22 | 2024-04-26 | 浙江振昊市政园林工程有限公司 | Intelligent road construction equipment |
-
2020
- 2020-09-04 CN CN202010921952.2A patent/CN112030688A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114522919A (en) * | 2021-12-31 | 2022-05-24 | 龙德建设有限公司 | Interior decoration engineering intelligent management device |
| CN117926740A (en) * | 2024-02-22 | 2024-04-26 | 浙江振昊市政园林工程有限公司 | Intelligent road construction equipment |
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Application publication date: 20201204 |