CN211848800U - Cement road surface health preserving cloth is laid and is watered curing means - Google Patents
Cement road surface health preserving cloth is laid and is watered curing means Download PDFInfo
- Publication number
- CN211848800U CN211848800U CN202020131539.1U CN202020131539U CN211848800U CN 211848800 U CN211848800 U CN 211848800U CN 202020131539 U CN202020131539 U CN 202020131539U CN 211848800 U CN211848800 U CN 211848800U
- Authority
- CN
- China
- Prior art keywords
- cloth
- health preserving
- water tank
- roller
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a cement pavement health preserving cloth laying and watering maintenance device, which comprises a first base, a water tank and a storage battery, wherein the first base is arranged on a frame of a tractor, the water tank is arranged above the first base, a water storage port is arranged at the top of the water tank, a water pump is arranged at the top of the rear end of the water tank, a water inlet pipe of the water pump extends into the bottom of the water tank, and a water outlet pipe of the water pump is connected with a spray head; the spray head is arranged at the rear end of the tractor; the first base is also provided with a health-care cloth spreading and rolling device, the health-care cloth spreading and rolling device comprises a support frame and a cloth roller, two ends of the cloth roller are connected with the support frame through bearings, and the cloth roller is connected with a driving mechanism; the cloth roller is wound with health preserving cloth; the water pump is connected to the electric energy output of battery, can realize laying and packing up of cement road surface health preserving cloth, can carry out the maintenance of watering simultaneously at laying the in-process, also can use the device to carry out the maintenance of watering in the health preserving period in addition, improves and lays efficiency, has also reduced workman's intensity of labour.
Description
Technical Field
The utility model relates to a cement road surface construction equipment technical field, concretely relates to cement road surface health preserving cloth is laid and is watered curing means.
Background
Early-stage micro cracks are easy to appear in the early stage of pavement concrete forming due to the influence of environmental temperature and humidity changes, and the micro cracks gradually expand under the coupling action of load-water-heat fields in the service period and form macro cracks. Once macroscopic cracks appear, rainwater and aggressive media penetrate into the interior of the surface layer and even the top surface of the base layer, so that the pavement is subjected to chemical erosion, the base layer and the surface layer are hollow, and diseases such as plate breakage, slab staggering and the like are further formed. Therefore, careful maintenance is required to be carried out on the cement pavement just after pouring, shrinkage and shrinkage cracks of cement concrete are avoided, and the method is an important means for improving the early and final mechanical properties of the concrete and ensuring the durability of the concrete.
At present, the pavement of the health maintenance cloth in the pavement concrete construction is paved manually by workers, the water is required to be repeatedly sprayed and maintained during the health maintenance period, and the soaked geotextile is required to be collected when the health maintenance period is finished. The construction mode is low in efficiency, time-consuming and labor-consuming, greatly influences the progress of the construction period, and can bring serious damage to cement road surfaces if the maintenance is not timely carried out in high-temperature seasons in summer.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a cement road surface health preserving cloth and lay and watering curing means, the device can realize laying and packing up of cement road surface health preserving cloth, can carry out the maintenance of watering simultaneously laying the in-process, also can carry out the maintenance of watering with the device in the health preserving period in addition.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the cement pavement health preserving cloth laying and watering maintenance device is characterized by comprising a first base, a water tank and a storage battery, wherein the first base is arranged on a frame of a tractor, the water tank is arranged above the first base, a water storage port is formed in the top of the water tank, a water pump is arranged at the top of the rear end of the water tank, a water inlet pipe of the water pump extends into the bottom of the water tank, and a water outlet pipe of the water pump is connected with a spray head; the spray head is arranged at the rear end of the tractor; the first base is also provided with a health-care cloth spreading and rolling device, the health-care cloth spreading and rolling device comprises a support frame and a cloth roller, two ends of the cloth roller are connected with the support frame through bearings, and the cloth roller is connected with a driving mechanism; the cloth roller is wound with health preserving cloth; the electric energy output end of the storage battery is connected with the water pump.
Set up the second base between the bottom of water tank and the first base, the lower of rear end of water tank is less than the height of the lower of water tank front end, and the outside of water tank is provided with the fluviograph.
The outlet of the water outlet pipe is connected with a shunt pipe, the lower end face of the shunt pipe is evenly provided with a spray head, and the spray head faces the road surface.
The bottom of support frame is connected with the slider, and the slider setting sets up the third base on the slide rail, and the both ends of slide rail are provided with slider positioning bolt.
The lower part of the cloth roller is provided with a lifting rod, the top end of the lifting rod is provided with a cloth rolling barrel bracket, and the upper end surface of the cloth rolling barrel bracket is an arc-shaped surface.
The driving mechanism comprises a cloth rolling motor, a driving wheel and a driven wheel, an output shaft of the cloth rolling motor is connected with the driving wheel, the driven wheel is connected with one end of a cloth rolling roller, the driving wheel is connected with the driven wheel through a driving belt, an electric energy input end of the cloth rolling motor is connected with an output end of a storage battery, and the tractor adopts an electric driving system.
The cloth roller comprises a sleeve and a cloth roller, the two ends of the cloth roller are respectively sleeved with the sleeve, the sleeve and the cloth roller are connected through a bolt, and the two ends of the sleeve are connected with the support frame through bearings.
The cloth roller is provided with two cloth clamps, the distance between the two cloth clamps is not less than the width of the health preserving cloth, and the gap between the cloth clamps and the surface of the cloth roller is less than the thickness of the health preserving cloth.
The cloth clamp and the cloth roller are fastened by screws.
The tail of the tractor is also provided with a health maintenance cloth supporting plate, the upper end of the health maintenance cloth supporting plate is connected with the supporting frame, and the lower end of the health maintenance cloth supporting plate extends out of the tail of the tractor.
Compared with the prior art, the utility model discloses following beneficial effect has at least: cement road surface health preserving cloth lay and watering curing means, through setting up health preserving cloth and spreading a roll device for whole device is at the in-process that removes, is realizing laying and curling up the mechanization of health preserving cloth, carries out the maintenance of watering in step, and the water pump is taken out the water in the water tank through suction, realizes the pressurization to spraying rivers, and can take out the water in the water tank totally, the using water wisely and avoid water tank ponding to corrode the water tank, in addition, also can utilize in the health preserving period the device sprays the maintenance, and the health preserving cloth is loaded on the tractor, can improve laying efficiency, has also reduced workman's intensity of labour, and the device simple structure, the modern design, the practicality is strong, and the reliability is high.
Furthermore, the cloth rolling motor provides power for laying and rolling up the health-preserving cloth, so that the labor is saved, and the construction efficiency is improved.
Furthermore, pressurized water is sprayed to the whole width direction of the health-preserving cloth synchronously by arranging the shunt pipes and the plurality of spray heads.
Furthermore, the cloth clamp for fixing the health-care cloth is arranged on the cloth rolling barrel, so that the health-care cloth is initially and quickly rolled.
Furthermore, through setting up elevating gear, can support when trading the health preserving yardage roll, make things convenient for the change of health preserving yardage roll.
Furthermore, the cloth rolling cylinder and the sleeve can be separated by rotating the fixing bolt and moving the sliding blocks below the two support frames, so that the replacement speed of the cloth rolling cylinder is increased, and the construction efficiency is improved.
Further, the tractor afterbody sets up the health preserving cloth layer board and helps improving the health preserving cloth and lays going on smoothly.
Furthermore, the driving system comprises a driving motor, a driving wheel and a driven gear, and the driving system can drive the device to move back and forth, so that power is provided for the movement of the device, and the problem that the existing equipment needs a tractor is solved.
Further, the utility model discloses set up first base, second base and third base, help realizing the modularization equipment of device, be convenient for carry out the later stage to this device and reform transform.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a front view of the lay and retract system;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is a front view of the nozzle;
FIG. 5 is a schematic view of a partial connection of a cloth roller;
figure 6 is a schematic view of a tractor drive system.
Wherein, 1 is a first base, 2 is a water tank, 3 is a water pump, 4 is a water pipe, 5 is a water pipe support, 6 is a spray head, 7 is a second base, 8 is a water level gauge, 9 is a health preserving cloth supporting plate, 10 is health preserving cloth, 11 is a cloth rolling motor, 12 is a driving wheel, 13 is a driven wheel, 14 is a cloth rolling barrel bracket, 15 is a cloth clamp, 16 is a bolt, 17 is a sleeve, 18 is a cloth rolling barrel, 19 is a supporting frame, 20 is a sliding block, 21 is a third base, 22 is a sliding rail, 23 is a bearing, 24 is a sliding block positioning bolt, 25 is a lifting rod, 26 is a driving motor, 27 is a driving wheel of the driving motor, 28 is a driven wheel of the driving motor, 29 is a shunt pipe, 30 is a cloth rolling roller, 31 is a water tank, and 32 is a storage battery.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the "front" and "rear" of the present invention are illustrated with reference to the driving direction of the tractor for convenience of explanation, the present invention provides a cement pavement health preserving cloth laying and watering maintenance device, which comprises a first base 1, a water tank 31 and a storage battery 32, wherein the first base 1 is arranged on the frame of the tractor, the water tank 31 is arranged above the first base 1, the top of the water tank 31 is provided with a water storage port 2, the top of the rear end of the water tank 31 is provided with a water pump 3, the water inlet pipe of the water pump 3 extends into the bottom of the water tank 31, and the water outlet pipe of the water pump 3 is connected with a spray head 6; the spray head 6 is arranged at the rear end of the tractor; the health-care cloth spreading and rolling device is further arranged on the first base 1 and comprises a support frame 19 and a cloth roller 30, two ends of the cloth roller 30 are connected with the support frame 19 through bearings, and the cloth roller 30 is connected with a driving mechanism; the cloth roller 30 is wound with the health preserving cloth 10; the electric energy output end of the storage battery 32 is connected with the water pump; the bottom of the support frame 19 is connected with a slide block 20, the slide block 20 is arranged on a slide rail 22, a third base is arranged below the slide rail 22, and slide block positioning bolts 24 are arranged at two ends of the slide rail 22; the cloth roller 30 is provided with a lifting rod 25 below, and the top end of the lifting rod 25 is provided with a cloth rolling tube bracket 14.
Optionally, a second base 7 is disposed between the bottom of the water tank 31 and the first base 1, and the rear end of the water tank 31 is lower than the front end of the water tank.
The driving mechanism comprises a cloth rolling motor 11, a driving wheel 12 and a driven wheel 13, an output shaft of the cloth rolling motor 11 is connected with the driving wheel 12, the driven wheel 13 is connected with one end of a cloth rolling roller 30, an electric energy input end of the cloth rolling motor 11 is connected with an output end of a storage battery, and the tractor adopts an electric driving system; the cloth roller 30 comprises a sleeve 17 and a cloth roller 18, the sleeve 17 is sleeved at two ends of the cloth roller 18 respectively, the sleeve 17 is connected with the cloth roller 18 through a bolt 16, and two ends of the sleeve 17 are connected with a support frame 19 through a bearing; the cloth roller 30 is provided with two cloth clamps 15, the distance between the two cloth clamps 15 is not less than the width of the health preserving cloth 10, and the gap between the cloth clamps 15 and the surface of the cloth roller 30 is less than the thickness of the health preserving cloth 10; the cloth clamp 15 is fastened with the cloth roller 30 by screws.
As an alternative embodiment, the battery 32 is located under the seat.
The driving and control room is arranged at the front end of the tractor, the first base 1 is arranged on the frame of the tractor, and the second base 7 and the third base 21 are fixedly connected on the first base 1; the top of the water tank 31 is provided with a water storage port 2, the water pump 3 is arranged at the top of the water tank, a water inlet pipe of the water pump 3 extends into the bottom of the water tank, the rear end of the water tank 31 is provided with a water level gauge 8, a water outlet pipe of the water pump 3 is connected with a flow distribution pipe 29, the bottom surface of the flow distribution pipe 29 is uniformly provided with spray heads 6, the lower end of each spray head 6 is right opposite to the health-preserving cloth 10 in the laying process, and a water pipe; the tail of the tractor is further provided with a health preserving cloth supporting plate 9, the upper end of the health preserving cloth supporting plate 9 is connected with a supporting frame 19, and the lower end of the health preserving cloth supporting plate 9 extends out of the tail of the tractor.
Referring to fig. 2 and 3, the health preserving cloth rolling device comprises a cloth rolling motor 11, a driving wheel 12, a driven wheel 13, a cloth rolling drum bracket 14, a cloth clamp 15, a bolt 16, a sleeve 17, a cloth rolling drum 18, a support frame 19, a slide block 20, a third base 21, a slide rail 22, a bearing 23, a slide block positioning bolt 24, a lifting rod 25 and a cloth rolling roller 30. A cloth roller 30 is arranged above the third base 21, two ends of the cloth roller 30 are respectively connected with a support frame 19 through bearings 23, one end of the cloth roller 30 is connected with a driven wheel 13, the lower end of the support frame 19 is fixed on a sliding block 20, sliding block positioning bolts 24 are respectively arranged on two sides of the sliding block 20, the sliding block 20 is arranged on a sliding rail 22, a cloth rolling motor 11 is arranged on the upper surface of the sliding block 20, the cloth rolling motor 11 is connected with a storage battery, an output shaft of the cloth rolling motor 11 is connected with a driving wheel 12, and the driving wheel 12 is connected with the driven wheel 13 through a transmission.
Referring to fig. 2 and 5, the cloth roller 30 includes a sleeve 17 and a cloth drum 18, the sleeve 17 is sleeved on each of two ends of the cloth drum 18, the sleeve 17 is connected with the cloth drum 18 through a bolt 16, bolt holes are formed in the sleeve 17 and the cloth drum 18, the bolt 16 penetrates through the bolt holes to connect the sleeve 17 with the cloth drum 18, and two ends of the sleeve 17 are connected with the support frame 19 through bearings.
Referring to fig. 4, the lower end of the water outlet pipe 4 is connected with a shunt pipe 29, the lower end surface of the shunt pipe 29 is uniformly provided with spray heads 6, and the lower ends of the spray heads 6 are opposite to the road surface or the health preserving cloth in the laying process.
As an alternative embodiment, referring to fig. 6, the tractor driving system includes a driving motor 26, a driving wheel 27 and a driven wheel 28, the driving motor 26 is fixed above the rear axle, the driving wheel 27 is connected to the left end of the driving motor 26, and the driven wheel 28 is arranged on the rear axle.
The utility model discloses a use does:
when the health preserving cloth is laid, firstly, the water tank 31 is filled with water, the tractor is moved to the starting point of the health preserving cloth laying, the slide block positioning bolt 24 is loosened, the bolt 16 connecting the cloth winding drum 18 and the sleeve 17 is loosened, then the slide block 20 below the support frame 19 is moved to be close to the tail of the tractor, after the lifting rod 25 is lifted, the cloth winding drum 18 wound with the health preserving cloth 10 is placed on the cloth winding drum bracket 14, then the slide block positioning bolt 24 is screwed again, and the bolt 16 connecting the cloth winding drum 18 and the sleeve 17 is screwed; start batching motor 11 and driving motor 26, batching motor 11 and the cooperation of driving motor 26 rotational speed make the speed of laying of health preserving cloth the same with the speed that the tractor gos forward, open water pump 3 simultaneously, carry out the maintenance of spraying water when laying health preserving cloth, when the health preserving cloth afterbody, manual taking off health preserving cloth from cloth clamp 15, when a roll health preserving cloth 10 is laid and is accomplished, close batching motor 11 and driving motor 26 and water pump 3, the process of installing the batching section of thick bamboo above only needing to repeat when the batching section of thick bamboo 18 of health preserving cloth is changed, finish when accomplishing is laid to all road surfaces. Need watering maintenance many times during the health preserving period, only need open water pump switch and driving motor 26 carry out watering health preserving can.
When the health preserving cloth is rolled up, advance the device to the starting point that the health preserving cloth was rolled up, manual fix health preserving cloth 10 on empty cloth roller 18 through cloth clamp 15, then start cloth rolling motor 11 and driving motor 26, keep the same speed that makes the rolling up speed of health preserving cloth and tractor advance of the two rotational speeds the same, treat that a roll health preserving cloth 10 rolling is accomplished the back, only need to change the cloth roller 18 that the rolling was accomplished, change and go on according to following step: after the lifting rod 25 is lifted, the cloth rolling tube 18 wound with the health preserving cloth 10 is supported on the cloth rolling tube bracket 14, the slide block positioning bolt 24 and the cloth rolling tube and the sleeved connecting bolt 16 are loosened, then the slide blocks 20 below the supporting frames 19 at two sides are moved outwards for a proper distance, another empty cloth rolling tube is replaced, then the slide block positioning bolt 24 and the cloth rolling tube and the sleeved connecting bolt 16 are screwed again, and the steps are repeated until all the road surface health preserving cloth is rolled up.
Claims (10)
1. A cement pavement health preserving cloth laying and sprinkling maintenance device is characterized by comprising a first base (1), a water tank (31) and a storage battery (32), wherein the first base (1) is arranged on a frame of a tractor, the water tank (31) is arranged above the first base (1), a water storage port (2) is formed in the top of the water tank (31), a water pump (3) is arranged at the top of the rear end of the water tank (31), a water inlet pipe of the water pump (3) extends into the bottom of the water tank (31), and a water outlet pipe (4) of the water pump (3) is connected with a spray head (6); the spray head (6) is arranged at the rear end of the tractor; the health-care cloth spreading and rolling device is further arranged on the first base (1) and comprises a support frame (19) and a cloth roller (30), two ends of the cloth roller (30) are connected with the support frame (19) through bearings, and the cloth roller (30) is connected with a driving mechanism; the cloth roller (30) is wound with health preserving cloth (10); the electric energy output end of the storage battery (32) is connected with the water pump.
2. The cement road surface health preserving cloth laying and watering maintenance device according to claim 1, characterized in that a second base (7) is arranged between the bottom of the water tank (31) and the first base (1), the lowest part of the rear end of the water tank (31) is lower than the lowest part of the front end of the water tank, and a water level gauge (8) is arranged outside the water tank (31).
3. A cement road surface health preserving cloth laying and watering maintenance device according to claim 1, characterized in that the outlet of the outlet pipe (4) is connected with a shunt pipe (29), the lower end surface of the shunt pipe (29) is evenly provided with spray heads (6), and the spray heads (6) face the road surface.
4. The cement pavement health preserving cloth laying and watering maintenance device according to claim 1, characterized in that the bottom of the supporting frame (19) is connected with a slide block (20), the slide block (20) is arranged on a slide rail (22), a third base is arranged below the slide rail (22), and slide block positioning bolts (24) are arranged at two ends of the slide rail (22).
5. The cement pavement health preserving cloth laying and watering maintenance device according to claim 1, characterized in that a lifting rod (25) is arranged below the cloth roller (30), a cloth rolling barrel bracket (14) is arranged at the top end of the lifting rod (25), and the upper end surface of the cloth rolling barrel bracket (14) is an arc surface.
6. The cement pavement health preserving cloth laying and watering maintenance device according to claim 1, wherein the driving mechanism comprises a cloth rolling motor (11), a driving wheel (12) and a driven wheel (13), an output shaft of the cloth rolling motor (11) is connected with the driving wheel (12), the driven wheel (13) is connected with one end of a cloth rolling roller (30), the driving wheel (12) and the driven wheel (13) are connected through a transmission belt, an electric energy input end of the cloth rolling motor (11) is connected with an output end of a storage battery, and the tractor adopts an electric driving system.
7. The cement pavement health preserving cloth laying and watering maintenance device according to claim 1, wherein the cloth roller (30) comprises a sleeve (17) and a cloth roller (18), the two ends of the cloth roller (18) are respectively sleeved with the sleeve (17), the sleeve (17) and the cloth roller (18) are connected through a bolt (16), and the two ends of the sleeve (17) are connected with the support frame (19) through a bearing.
8. The cement pavement health preserving cloth laying and watering maintenance device as claimed in claim 1, characterized in that the cloth roller (30) is provided with two cloth clamps (15), the distance between the two cloth clamps (15) is not less than the width of the health preserving cloth (10), and the gap between the cloth clamps (15) and the surface of the cloth roller (30) is less than the thickness of the health preserving cloth (10).
9. The cement pavement curing cloth laying and watering curing device according to claim 8, wherein the cloth clamp (15) is fastened with the cloth roller (30) by screws.
10. The cement pavement health preserving cloth laying and sprinkling curing device as claimed in claim 1, wherein the tail of the tractor is further provided with a health preserving cloth supporting plate (9), the upper end of the health preserving cloth supporting plate (9) is connected with the supporting frame (19), and the lower end of the health preserving cloth supporting plate (9) extends out of the tail of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020131539.1U CN211848800U (en) | 2020-01-20 | 2020-01-20 | Cement road surface health preserving cloth is laid and is watered curing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020131539.1U CN211848800U (en) | 2020-01-20 | 2020-01-20 | Cement road surface health preserving cloth is laid and is watered curing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211848800U true CN211848800U (en) | 2020-11-03 |
Family
ID=73232611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020131539.1U Expired - Fee Related CN211848800U (en) | 2020-01-20 | 2020-01-20 | Cement road surface health preserving cloth is laid and is watered curing means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211848800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155407A (en) * | 2020-01-20 | 2020-05-15 | 长安大学 | Cement road surface curing means |
-
2020
- 2020-01-20 CN CN202020131539.1U patent/CN211848800U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155407A (en) * | 2020-01-20 | 2020-05-15 | 长安大学 | Cement road surface curing means |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108149929B (en) | Crawler-type floor concrete distribution system and construction method thereof | |
| CN110469095B (en) | Automatic watering device of construction concrete | |
| CN211848800U (en) | Cement road surface health preserving cloth is laid and is watered curing means | |
| CN108068211A (en) | Plastic concrete trough plate preparation method | |
| CN111155407A (en) | Cement road surface curing means | |
| CN111156029A (en) | Tunnel secondary lining vault pouring construction device and construction method | |
| CN216000894U (en) | Template equipment with multi-functional short T type roof beam is prefabricated | |
| CN112405804A (en) | Automatic control spraying maintenance system for prefabricated box girder | |
| CN214091091U (en) | Concrete curing means for subway engineering | |
| CN210916930U (en) | Municipal works road maintenance device | |
| CN105040704A (en) | Automatic panel trimming and plastering machine for full concrete faced rockfill dam concrete panel construction line | |
| CN215482967U (en) | Hydraulic engineering is curing means for construction concrete | |
| CN202388594U (en) | Grouting line | |
| CN204959758U (en) | Construction of panel rock -fill dam concrete panel is automatic machine of smearing of repairing of section panel completely | |
| CN220807897U (en) | Ballastless track bed board maintenance horizontal slipway | |
| CN206438781U (en) | A kind of concrete curing device | |
| CN106613780A (en) | Lawn sprinkling device for garden | |
| CN218755493U (en) | Spraying and curing device for prefabricated T-shaped beam concrete | |
| CN111501492A (en) | Highway drainage ditch traction extrusion type slip form construction equipment and construction method | |
| CN113073526A (en) | Concrete road maintenance method | |
| CN216999201U (en) | Roadbed maintenance device used during highway construction | |
| CN219342751U (en) | Concrete compaction device | |
| CN111140007A (en) | Side wall molding trolley without pull rod and side wall construction method | |
| CN214981961U (en) | Concrete pipe internal surface finishing device | |
| CN219992240U (en) | Variable cross-section continuous box girder cantilever cast-in-situ construction auxiliary device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201103 Termination date: 20220120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |