CN108774979B - Bridge construction is with guardrail belt cleaning device convenient to remove - Google Patents
Bridge construction is with guardrail belt cleaning device convenient to remove Download PDFInfo
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- CN108774979B CN108774979B CN201810741813.4A CN201810741813A CN108774979B CN 108774979 B CN108774979 B CN 108774979B CN 201810741813 A CN201810741813 A CN 201810741813A CN 108774979 B CN108774979 B CN 108774979B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/005—Mobile installations, particularly for upkeeping in situ road or railway furniture, for instance road barricades, traffic signs; Mobile installations particularly for upkeeping tunnel walls
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Abstract
The invention belongs to the technical field of bridge construction, and particularly relates to a guardrail cleaning device convenient to move for bridge construction. The guardrail cleaning device can remind passers-by to pay attention to avoidance in real time, is convenient for workers to use equipment to clean guardrails quickly, and can suck dust into the dust collection box by installing the dust collector, so that the cleaning efficiency is improved.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a guardrail cleaning device convenient to move for bridge construction.
Background
The bridge guardrail is a guardrail arranged on a bridge. Its purpose is in order to prevent that the vehicle out of control from crossing outside the bridge, has the function that makes the vehicle can not break through, wear down, cross the bridge and beautify the bridge building.
The guard rail is very dirty after being blown by wind and exposed to the sun for a long time, the appearance of a city is influenced, cleaning personnel are required to clean the guard rail, the labor intensity for manually cleaning the guard rail is high, the efficiency is low, the traffic flow in daytime is large, the personal safety of the cleaning personnel is threatened, and the normal traffic is influenced.
Through the retrieval, chinese patent application number is CN 201720662972.6's patent, discloses a public road bridge roof beam guardrail belt cleaning device, including the base, the welding of the top left side front and back end of base has the handrail, the right side fixed mounting that the top of base is located the handrail has storage battery. A public road bridge roof beam guardrail belt cleaning device in above-mentioned patent exists following not enough: the device has no warning effect, pedestrians or vehicles easily block the device from advancing and cleaning, and the moving effect is poor.
Disclosure of Invention
The invention provides a guardrail cleaning device convenient to move for bridge construction, which is based on the technical problem that pedestrians or vehicles easily block equipment from advancing when the guardrail cleaning device is used.
The invention provides a guardrail cleaning device convenient to move for bridge construction, which comprises a dust collection box, universal wheels are fixed at four corners of the outer wall of the bottom of the dust collection box through screws, a water storage box is welded on the outer wall of the top of the dust collection box, a drain outlet is formed in the outer wall of one side of the dust collection box, a side cover is connected on the inner wall of the bottom of the drain outlet through a hinge, a support table is welded on the outer wall of one side of the dust collection box, a first hydraulic cylinder is fixed on the outer wall of the top of the support table through bolts, a rotating mechanism is arranged on the outer wall of the top of the first hydraulic cylinder and comprises two rotating seats and a second hydraulic cylinder, the outer wall of one side, opposite to the two rotating seats, is fixed with the same rotating shaft through a bearing, the outer wall of the bottom of one rotating seat is fixed on the outer wall of the top of the first, a second fixed seat is fixed on the outer wall of one side of the second hydraulic cylinder through bolts, a connecting column is welded on the outer wall of the bottom of the second fixed seat, a first fixed seat is welded on the outer wall of the bottom of the connecting column, a slide rail is fixed on the outer wall of the bottom of the first fixed seat through screws, connecting seats are welded on the outer walls of two sides of the first fixed seat, a fixed frame is welded on one side of the outer wall of the bottom of the connecting seat, a first hydraulic rod is fixed on the outer wall of one side of each of the two fixed frames through screws, a fixed sleeve is fixed on the outer wall of one end of each of the first hydraulic rods through screws, a supporting plate is welded on the outer wall of one side of the water storage box, a water pump is fixed on one side of the outer wall of the top of the supporting plate through screws, a first guide pipe is inserted, and the top outer walls of the two second hydraulic rods are connected with the same T-shaped fixing table through hinges, the inner wall of one end of the T-shaped fixing table is connected with a spray pipe in an inserting mode, the inner wall of one end of the spray pipe is connected with a nozzle in an inserting mode, and one end, far away from the nozzle, of the spray pipe is connected with the output end of the water pump in an inserting mode through a water pipe.
Preferably, the welding of one side of fixed cover bottom outer wall has the firm frame of L type structure, and the equal sliding connection in both sides of slide rail inner wall has the slider, and the bottom outer wall of slider and the top outer wall of firm frame are fixed with same dwang through the bearing, and the dwang rotates to be connected in the inner wall of fixed cover, and two round brushes have been cup jointed to the outer wall of dwang, and fixed cover is located between two round brushes, and one side outer wall that first hydraulic stem was kept away from to fixed cover has the brush through the fix with screw, and the specification of brush and the specification looks adaptation of fixed cover.
Preferably, the outer wall welding of one side of spliced pole has the connecting bar, and the both sides outer wall of connecting bar has all welded the extension rod, and the one end welding of extension rod has the fixed plate, and one side outer wall of fixed plate has two to three air dryer through the fix with screw.
Preferably, a dust collector is fixed on one side of the outer wall of the bottom of the supporting table through a screw, a first dust guide pipe is inserted into the input end of the dust collector, a wind gathering cover is inserted into one end of the first dust guide pipe, a first pipe fixing frame is fixed on the other side of the outer wall of the bottom of the supporting table through a screw, the first dust guide pipe is inserted into the first pipe fixing frame, and a same second dust guide pipe is inserted into the outer wall of one side of the output end of the dust collector and the dust collection box.
Preferably, a motor supporting table is welded on the outer wall of one side of the water storage tank, a servo motor is fixed on the outer wall of the top of the motor supporting table through screws, the output shaft of the servo motor is sleeved with the same transmission belt with the outer wall of the rotating shaft, and the output shaft of the servo motor forms rotating fit with the rotating shaft through the transmission belt.
Preferably, the water inlet is formed in the outer wall of the top of the water storage tank, the water inlet hopper is welded to the inner wall of the water inlet, and the filter screen is fixed to the inner wall of the water inlet hopper through screws.
Preferably, the outer wall welding of one side of water storage box has two bracing pieces, and the one end outer wall of two bracing pieces has same solar cell panel through the fix with screw, and solar cell panel's output is connected with solar control ware through the wire, and solar control ware's output is connected with the battery through the wire, and the output of battery is connected with the dc-to-ac converter through the wire, and the opposite side outer wall welding of water storage box has two handles, and the outer wall of handle has cup jointed the rubber sleeve.
Preferably, one side of water storage box top outer wall is passed through the fix with screw and is had the warning light, and one side outer wall that the water storage box is close to solar cell panel has loudspeaker through the fix with screw, and dust catcher, first pneumatic cylinder, first hydraulic stem, second pneumatic cylinder, warning light, loudspeaker, water pump, servo motor, second hydraulic stem and air dryer all are connected with the switch, and the switch is connected with the output of dc-to-ac converter through the wire.
The beneficial effects of the invention are as follows:
1. through setting up loudspeaker and warning light, can remind passerby in real time to notice and dodge, make things convenient for workman's use equipment to clear up the guardrail fast, improved the efficiency that equipment removed to improve work efficiency, and install solar cell panel, can turn into the electric energy with light energy, energy-concerving and environment-protective.
2. Through setting up water pump and nozzle, can spray water in advance before the clearance guardrail, avoid the phenomenon that the dust flies upward to take place, install the dust catcher simultaneously and can improve cleaning efficiency with the dust suction in the dust collection box.
3. Through setting up servo motor, can rotate second fixing base to dust collection box the place ahead, reduced the area of equipment when not using, through the first pneumatic cylinder of installation, can freely adjust the height of first fixing base, can freely adjust the distance of two round brushes through first hydraulic stem simultaneously, improved the flexibility ratio of guardrail clearance, convenient the regulation.
Drawings
Fig. 1 is a schematic overall structure diagram of a guardrail cleaning device for bridge construction, which is convenient to move;
fig. 2 is a schematic structural diagram of a guardrail cleaning device rotating mechanism convenient to move for bridge construction according to the invention;
FIG. 3 is an enlarged view of a part of the guardrail cleaning device for bridge construction, which is provided by the invention and is convenient to move;
fig. 4 is a schematic side view of a guardrail cleaning device for bridge construction, which is convenient to move;
fig. 5 is a side view of a connecting column structure of a guardrail cleaning device for bridge construction, which is convenient to move.
In the figure: 1 dust collection box, 2 universal wheels, 3 side covers, 4 water storage tanks, 5 support plates, 6 dust collectors, 7 first hydraulic cylinders, 8 first pipe fixing frames, 9 support tables, 10 fixing frames, 11 firm frames, 12 rolling brushes, 13 fixing sleeves, 14 first hydraulic rods, 15 connecting seats, 16 first fixing seats, 17 sliding rails, 18 second fixing seats, 19 connecting columns, 20 sliding blocks, 21 second hydraulic cylinders, 22 rotating seats, 23 water inlet hoppers, 24 filter screens, 25 solar panels, 26 warning lamps, 27 horns, 28 water pumps, 29 servo motors, 30 motor support tables, 31T-shaped fixing tables, 32 spray pipes, 33 second hydraulic rods, 34 nozzles, 35 connecting rods, 36 air dryers, 37 fixing plates and 38 handles.
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.
Referring to fig. 1-5, a guardrail cleaning device for bridge construction, which is convenient to move, comprises a dust collection box 1, universal wheels 2 are fixed at four corners of the outer wall of the bottom of the dust collection box 1 through screws, a water storage box 4 is welded on the outer wall of the top of the dust collection box 1, a sewage discharge port is formed in the outer wall of one side of the dust collection box 1, a side cover 3 is connected to the inner wall of the bottom of the sewage discharge port through a hinge, a support table 9 is welded on the outer wall of one side of the dust collection box 1, a first hydraulic cylinder 7 is fixed on the outer wall of the top of the support table 9 through bolts, a rotating mechanism is arranged on the outer wall of the top of the first hydraulic cylinder 7 and comprises two rotating seats 22 and a second hydraulic cylinder 21, the outer wall of the opposite side of the two rotating seats 22 is fixed with a same rotating shaft through bearings, the outer wall of the bottom of one rotating seat 22 is fixed on the outer, a second fixed seat 18 is fixed on the outer wall of one side of a second hydraulic cylinder 21 through bolts, a connecting column 19 is welded on the outer wall of the bottom of the second fixed seat 18, a first fixed seat 16 is welded on the outer wall of the bottom of the connecting column 19, a slide rail 17 is fixed on the outer wall of the bottom of the first fixed seat 16 through screws, connecting seats 15 are welded on the outer walls of two sides of the first fixed seat 16, fixing frames 10 are welded on one side of the outer wall of the bottom of each connecting seat 15, a first hydraulic rod 14 is fixed on the outer wall of one side of each fixing frame 10 through screws, a fixing sleeve 13 is fixed on the outer wall of one end of each first hydraulic rod 14 through screws, a supporting plate 5 is welded on the outer wall of one side of a water storage tank 4, a water pump 28 is fixed on one side of the outer wall of the top of the supporting plate 5 through screws, a first guide pipe is inserted into the water storage, and the outer walls of the tops of the two second hydraulic rods 33 are connected with the same T-shaped fixing table 31 through hinges, the inner wall of one end of the T-shaped fixing table 31 is connected with a spray pipe 32 in an inserting mode, the inner wall of one end of the spray pipe 32 is connected with a spray nozzle 34 in an inserting mode, and one end, far away from the spray nozzle 34, of the spray pipe 32 is connected with the output end of the water pump 28 in an inserting mode.
In the invention, a firm frame 11 with an L-shaped structure is welded on one side of the outer wall of the bottom of a fixed sleeve 13, two sides of the inner wall of a sliding rail 17 are both connected with a sliding block 20 in a sliding manner, the same rotating rod is fixed on the outer wall of the bottom of the sliding block 20 and the outer wall of the top of the firm frame 11 through a bearing and is rotatably connected with the inner wall of the fixed sleeve 13, two rolling brushes 12 are sleeved on the outer wall of the rotating rod, the fixed sleeve 13 is positioned between the two rolling brushes 12, a brush is fixed on the outer wall of one side of the fixed sleeve 13 away from a first hydraulic rod 14 through a screw, the specification of the brush is matched with that of the fixed sleeve 13, a connecting rod 35 is welded on the outer wall of one side of a connecting column 19, extension rods are welded on the outer walls of two sides of the connecting rod 35, a fixed plate 37 is welded on one, and the input end of the dust collector 6 is inserted with a first dust guide pipe, one end of the first dust guide pipe is inserted with a wind gathering cover, the other side of the outer wall of the bottom of the support platform 9 is fixed with a first pipe body fixing frame 8 through screws, the first dust guide pipe is inserted in the first pipe body fixing frame 8, the output end of the dust collector 6 and the outer wall of one side of the dust collection box 1 are inserted with a same second dust guide pipe, the outer wall of one side of the water storage box 4 is welded with a motor support platform 30, the outer wall of the top of the motor support platform 30 is fixed with a servo motor 29 through screws, the output shaft of the servo motor 29 and the outer wall of the rotating shaft are sleeved with a same driving belt, the output shaft of the servo motor 29 and the rotating shaft form rotating fit through the driving belt, the outer wall of the top of the water storage box 4 is provided with a water inlet, the inner wall of the water inlet is welded, and the outer wall of one end of the two support rods is fixed with the same solar cell panel 25 through screws, the output end of the solar cell panel 25 is connected with a solar controller through a lead, the output end of the solar controller is connected with a storage battery through a lead, the output end of the storage battery is connected with an inverter through a lead, the outer wall of the other side of the water storage tank 4 is welded with two handles 38, the outer wall of each handle 38 is sleeved with a rubber sleeve, one side of the outer wall of the top of the water storage tank 4 is fixed with a warning lamp 26 through screws, and a horn 27 is fixed on the outer wall of one side of the water storage tank 4 close to the solar cell panel 25 through screws, the dust collector 6, the first hydraulic cylinder 7, the first hydraulic rod 14, the second hydraulic cylinder 21, the warning lamp 26, the horn 27, the water pump 28, the servo motor 29, the second hydraulic rod 33 and the air dryer 36 are all connected with a switch, and the switch is connected with the output end of the inverter through a wire.
During the use, through universal wheel 2 mobile device to suitable position, through second hydraulic stem 33, adjust the angle of nozzle 34, start water pump 28 and to the guardrail water spray, adjust the height to suitable position of second fixing base 18 through first pneumatic cylinder 7, start first hydraulic stem 14 and promote slider 20 and remove, it is clean to adjust round brush 12 completion guardrail with this, and start air dryer 36 and air-dry the guardrail, when not needing equipment, start servo motor 29 and remove first fixing base 16 to certain angle, it accomodates to accomplish equipment.
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 (8)
1. A guardrail cleaning device convenient to move for bridge construction comprises a dust collection box (1) and is characterized in that four corners of the outer wall of the bottom of the dust collection box (1) are respectively fixed with universal wheels (2) through screws, the outer wall of the top of the dust collection box (1) is welded with a water storage box (4), the outer wall of one side of the dust collection box (1) is provided with a sewage draining outlet, the inner wall of the bottom of the sewage draining outlet is connected with a side cover (3) through a hinge, the outer wall of one side of the dust collection box (1) is welded with a support table (9), the outer wall of the top of the support table (9) is fixed with a first hydraulic cylinder (7) through bolts, the outer wall of the top of the first hydraulic cylinder (7) is provided with a rotating mechanism, the rotating mechanism comprises two rotating seats (22) and a second hydraulic cylinder (21), and the outer wall of one opposite, and the outer wall of the bottom of one rotating seat (22) is fixed on the outer wall of the top of the first hydraulic cylinder (7) through screws, the outer wall of the top of the other rotating seat (22) is fixed on the outer wall of the bottom of the second hydraulic cylinder (21) through screws, the outer wall of one side of the second hydraulic cylinder (21) is fixed with a second fixing seat (18) through bolts, the outer wall of the bottom of the second fixing seat (18) is welded with a connecting column (19), the outer wall of the bottom of the connecting column (19) is welded with a first fixing seat (16), the outer wall of the bottom of the first fixing seat (16) is fixed with a sliding rail (17) through screws, the outer walls of the two sides of the first fixing seat (16) are both welded with connecting seats (15), one side of the outer wall of the bottom of the connecting seats (15) is welded with a fixing frame (10), and the one end outer wall of first hydraulic stem (14) has fixed cover (13) through the fix with screw, the welding of one side outer wall of water storage box (4) has backup pad (5), and one side of backup pad (5) top outer wall has water pump (28) through the fix with screw, and the input of water pump (28) is pegged graft and is had first pipe, and the one end of first pipe is pegged graft in water storage box (4), one side of backup pad (5) top outer wall has two second hydraulic stems (33) through the fix with screw, and the top outer wall of two second hydraulic stems (33) has same T type fixed station (31) through hinged joint, and the one end inner wall of T type fixed station (31) is pegged graft and is had spray tube (32), and the one end inner wall of spray tube (32) is pegged graft and is had nozzle (34), and the one end that nozzle (34) were kept away from in.
2. The guardrail cleaning device convenient to move for bridge construction as claimed in claim 1, wherein a fixing frame (11) with an L-shaped structure is welded on one side of the bottom outer wall of the fixing sleeve (13), sliding blocks (20) are slidably connected on both sides of the inner wall of the sliding rail (17), the bottom outer wall of each sliding block (20) and the top outer wall of the fixing frame (11) are fixed with a same rotating rod through a bearing, the rotating rods are rotatably connected to the inner wall of the fixing sleeve (13), two rolling brushes (12) are sleeved on the outer wall of each rotating rod, the fixing sleeve (13) is located between the two rolling brushes (12), a brush is fixed on the outer wall of one side of the fixing sleeve (13) far away from the first hydraulic rod (14) through a screw, and the specification of the brush is matched with the specification of the fixing sleeve (13).
3. The guardrail cleaning device convenient to move for bridge construction according to claim 1, wherein the connecting rod (35) is welded on the outer wall of one side of the connecting column (19), the extending rods are welded on the outer walls of two sides of the connecting rod (35), the fixing plate (37) is welded on one end of each extending rod, and two to three air dryers (36) are fixed on the outer wall of one side of the fixing plate (37) through screws.
4. The guardrail cleaning device convenient to move for bridge construction according to claim 1, wherein a dust collector (6) is fixed on one side of the outer wall of the bottom of the supporting platform (9) through screws, a first dust guide pipe is inserted into the input end of the dust collector (6), a wind collecting cover is inserted into one end of the first dust guide pipe, a first pipe fixing frame (8) is fixed on the other side of the outer wall of the bottom of the supporting platform (9) through screws, the first dust guide pipe is inserted into the first pipe fixing frame (8), and the same second dust guide pipe is inserted into the output end of the dust collector (6) and the outer wall of one side of the dust collection box (1).
5. The guardrail cleaning device convenient to move for bridge construction according to claim 1, wherein a motor support table (30) is welded on the outer wall of one side of the water storage tank (4), a servo motor (29) is fixed on the outer wall of the top of the motor support table (30) through screws, the output shaft of the servo motor (29) and the outer wall of the rotating shaft are sleeved with the same transmission belt, and the output shaft of the servo motor (29) is in rotating fit with the rotating shaft through the transmission belt.
6. The guardrail cleaning device convenient to move for bridge construction according to claim 5 is characterized in that a water inlet is formed in the outer wall of the top of the water storage tank (4), a water inlet hopper (23) is welded to the inner wall of the water inlet, and a filter screen (24) is fixed to the inner wall of the water inlet hopper (23) through screws.
7. The guardrail cleaning device convenient to move for bridge construction according to claim 6, wherein two support rods are welded on the outer wall of one side of the water storage tank (4), the same solar cell panel (25) is fixed on the outer wall of one end of each support rod through screws, the output end of each solar cell panel (25) is connected with a solar controller through a lead, the output end of each solar controller is connected with a storage battery through a lead, the output end of each storage battery is connected with an inverter through a lead, two handles (38) are welded on the outer wall of the other side of the water storage tank (4), and the outer wall of each handle (38) is sleeved with a rubber sleeve.
8. The guardrail cleaning device convenient to move for bridge construction according to claim 7, wherein a warning light (26) is fixed on one side of the outer wall of the top of the water storage tank (4) through screws, a horn (27) is fixed on the outer wall of one side, close to the solar cell panel (25), of the water storage tank (4), the dust collector (6), the first hydraulic cylinder (7), the first hydraulic rod (14), the second hydraulic cylinder (21), the warning light (26), the horn (27), the water pump (28), the servo motor (29), the second hydraulic rod (33) and the air dryer (36) are connected with switches, and the switches are connected with the output end of the inverter through wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741813.4A CN108774979B (en) | 2018-07-09 | 2018-07-09 | Bridge construction is with guardrail belt cleaning device convenient to remove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741813.4A CN108774979B (en) | 2018-07-09 | 2018-07-09 | Bridge construction is with guardrail belt cleaning device convenient to remove |
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| CN108774979A CN108774979A (en) | 2018-11-09 |
| CN108774979B true CN108774979B (en) | 2020-04-21 |
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| CN201810741813.4A Active CN108774979B (en) | 2018-07-09 | 2018-07-09 | Bridge construction is with guardrail belt cleaning device convenient to remove |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267523B (en) * | 2018-11-23 | 2020-06-23 | 温州辰思工业设计有限公司 | Multi-functional road railing cleaning equipment |
| CN109972574B (en) * | 2019-05-05 | 2024-02-27 | 瑞德(新乡)路业有限公司 | Rolling brush for guardrail cleaning machine |
| CN110754999B (en) * | 2019-08-28 | 2021-03-02 | 南京驭逡通信科技有限公司 | Indoor cleaning robot and working principle |
| CN112323691A (en) * | 2020-11-03 | 2021-02-05 | 温州融宸科技有限公司 | Bridge guardrail cleaning device and using method thereof |
| CN117340460B (en) * | 2023-12-05 | 2024-03-12 | 定州市宏远机械有限公司 | Flexible intelligent welding system for bottom plate of automobile cargo box |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2801883Y (en) * | 2005-05-26 | 2006-08-02 | 长沙兴宏科技开发有限公司 | Drum type cleaning vehicle for city road handrail |
| CN2871638Y (en) * | 2005-12-29 | 2007-02-21 | 倪结忠 | Road isolation railing sweeper |
| CN206721759U (en) * | 2017-05-09 | 2017-12-08 | 姚立红 | A kind of expressway barrier curing means |
| CN107858969B (en) * | 2017-11-08 | 2019-10-08 | 速达(泰州)新能源有限公司 | A kind of two-sided cleaning equipment of road guard |
| CN207525686U (en) * | 2017-11-17 | 2018-06-22 | 范琴 | A kind of guardrail cleaning device |
| CN108086213A (en) * | 2017-12-28 | 2018-05-29 | 成都煜萃科技有限公司 | A kind of Bridge guardrail cleaning device |
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Inventor after: Chang Naibo Inventor after: Wang Li Inventor before: Wang Li |
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Effective date of registration: 20200310 Address after: 264000 Building 46, Jindong District, Yantai Development Zone, Shandong Province Applicant after: Chang Naibo Address before: 210019 room 62077, East Business District, Olympic Sports Center Stadium, 222 Jiangdong Road, Jianye District, Nanjing, Jiangsu. Applicant before: Nanjing Hai Chen Xia Engineering Technology Co., Ltd. |
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