CN219748428U - Bridge prefabrication field circulation type automatic spraying maintenance system - Google Patents
Bridge prefabrication field circulation type automatic spraying maintenance system Download PDFInfo
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- CN219748428U CN219748428U CN202320617357.9U CN202320617357U CN219748428U CN 219748428 U CN219748428 U CN 219748428U CN 202320617357 U CN202320617357 U CN 202320617357U CN 219748428 U CN219748428 U CN 219748428U
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- 238000009417 prefabrication Methods 0.000 title claims abstract description 54
- 238000005507 spraying Methods 0.000 title claims abstract description 49
- 238000012423 maintenance Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 177
- 239000007921 spray Substances 0.000 claims abstract description 29
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 31
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000004062 sedimentation Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a circulating automatic spraying maintenance system for a bridge prefabrication field, which belongs to the technical field of bridge maintenance and comprises a plurality of water pipe branch pipes, wherein the water pipe branch pipes are respectively arranged in corresponding bridge prefabrication pedestals, and a plurality of water outlets communicated with the water pipe branch pipes are arranged in the bridge prefabrication pedestals at intervals. The utility model can solve the technical problem of poor spraying effect caused by the fact that the position of the movable spray head is kept unchanged in the curing process of the existing spraying curing system.
Description
Technical Field
The utility model belongs to the technical field of bridge maintenance, and particularly relates to a circulating automatic spraying maintenance system for a bridge prefabrication field.
Background
In order to strengthen the initial maintenance of concrete and improve the concrete quality of precast beam slabs, spray maintenance systems have been widely popularized in various precast sites. At present, most prefabricated fields are pre-buried with running water pipes in the initial stage of construction, and the poured concrete structure is directly sprayed and maintained by using running water, alkaline maintenance water in the sprayed fields partially permeates into the ground surface and partially flows into sewage pipelines, so that water resources are wasted and environmental pollution is easily caused; most spraying systems in the industry are flat plate type pipe rack systems or water mist spraying systems, the former are arranged on the top surface of a box girder, the former are heavy and heavy, the gantry crane is required to be assembled and disassembled in a matched mode, and the latter are greatly influenced by water pressure and cannot spray the top plate of the box girder; the water pipe valve is opened and closed by workers to control the spraying maintenance process during concrete maintenance, so that excessive human factor interference is caused to the concrete maintenance work, and water resource waste is easy to occur; in addition, the air temperature in the northern area is low, and when the winter construction period is entered, a steam maintenance system is required to be additionally put into, so that the resources of the existing spraying equipment are idle.
The utility model patent with the publication number of CN203919328U discloses a circulating automatic spraying maintenance system of a bridge prefabrication site, which is matched with a bridge prefabrication pedestal, a galvanized water pipe is arranged in the bridge prefabrication pedestal, and a plurality of water outlets communicated with the galvanized water pipe in the bridge prefabrication pedestal are arranged in the bridge prefabrication pedestal at intervals; the galvanized water pipe in the bridge prefabrication pedestal is communicated with an external circulating pool, a booster pump, a water pressure gauge, a water pressure regulating valve and a water outlet valve are sequentially arranged on a galvanized water pipe main pipe between the circulating pool and the bridge prefabrication pedestal, the booster pump is arranged in the circulating pool, the booster pump is externally connected with a time relay, the time relay is arranged in a control box, the galvanized water pipe main pipe between the water outlet valve and the bridge prefabrication pedestal is connected with a steam boiler pipeline through a steam valve, and the steam boiler pipeline is connected with the steam boiler; the two sides of the bridge prefabrication pedestal are respectively provided with a water collecting tank, one end of the water collecting tank is provided with a rain water tank, and the rain water tank is communicated with the sedimentation tank through a rain water pipe; the sedimentation tank is adjacent to the circulating tank, and is communicated with the middle lower part of the circulating tank; the water outlet is connected with a movable spray head on the stainless steel spray support through a spray hose, the stainless steel spray support is arranged on the side face of the bridge prefabrication pedestal, and the height of the movable spray head is matched with the height of a prefabrication beam arranged on the bridge prefabrication pedestal. Although the system can collect rainwater through a closed water circulation system, the maintenance water resource is recycled, and the resource is saved; and can adjust spraying time according to different climatic conditions and air humidity, ensure that concrete surface is in the moist state constantly, but above-mentioned technical scheme is in the maintenance in-process, and the position of movable shower nozzle remains unchanged, leads to spraying effect not good.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a circulating automatic spraying maintenance system for a bridge prefabrication field.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a bridge prefabrication field circulation formula automatic spray maintenance system, includes that a plurality of water pipes are in charge, and a plurality of water pipes are in charge to set up respectively in the bridge prefabrication pedestal that corresponds, and the interval is provided with a plurality of delivery ports that are linked together with the water pipe is in charge in the bridge prefabrication pedestal, its characterized in that, the both sides of bridge prefabrication pedestal are provided with adjustable spraying unit respectively symmetry, and every adjustable spraying unit all is connected with a plurality of delivery ports that correspond with the homonymy.
Preferably, each adjustable spraying unit comprises a supporting seat, a plurality of supporting rods, a plurality of first water pipes, a plurality of second water pipes, a plurality of third water pipes, a plurality of first spray heads, a plurality of adjusting mechanisms and a plurality of second spray heads, wherein the supporting seat is arranged on the outer side of the bridge prefabrication pedestal, the plurality of supporting rods are vertically arranged at the top of the supporting seat at intervals along the length direction of the supporting seat, one ends of the plurality of first water pipes are connected with corresponding water outlets, the other ends of the plurality of first water pipes are connected with the third water pipes, the second water pipes are communicated with the first water pipes and are arranged between the first water pipes and the third water pipes, the second water pipes are connected with the corresponding first spray heads, each first water pipe is fixed with the corresponding supporting rod, the plurality of adjusting mechanisms are respectively arranged at the end parts of the corresponding third water pipes, each adjusting mechanism is connected with the corresponding second spray heads, and the plurality of adjusting mechanisms are connected through driving mechanisms.
Preferably, each adjusting mechanism comprises a fixing plate, a screw rod, an inner thread pipe, a limiting plate, a fourth water pipe, a hose, a guide rod and a guide ring, wherein the fixing plate is arranged at the top of the third water pipe, the screw rod is rotationally connected with the inner wall of the fixing plate, the other end of the screw rod is sleeved with the inner thread pipe, the limiting plate is arranged at the bottom of the inner thread pipe, the fourth water pipe is fixedly arranged at the bottom of the limiting plate, the guide rod is arranged at the bottom of the fourth water pipe, the guide rod is of an L-shaped structure, the guide ring is fixedly arranged at the bottom of the third water pipe, the other end of the guide rod is movably spliced with the guide ring, one end of the hose is connected with the third water pipe, the other end of the hose is connected with the fourth water pipe, and the other end of the fourth water pipe is connected with the second spray head.
Preferably, the driving mechanism comprises a driving gear, a motor, a rotating rod, a transmission belt and a plurality of driven gears, wherein an output shaft of the motor is fixedly connected with the rotating rod through a coupler, the driving gear is arranged on the rotating rod, the driven gears are respectively correspondingly arranged on the plurality of screw rods, and the driving gear is connected with the driven gears through the transmission belt.
Preferably, the bridge prefabrication field circulating automatic spraying maintenance system further comprises a water tank and a water pipe main pipe, wherein the water tank is respectively communicated with the plurality of water pipe sub-pipes through the water pipe main pipe.
Preferably, the water pipe is responsible for and has set gradually booster pump, water pressure gauge, water pressure governing valve and play water valve, and the booster pump sets up in the water tank, and booster pump external time relay, time relay install in the control box.
Preferably, the water pipe main pipe is provided with a steam valve, the steam valve is externally connected with a steam boiler through a steam boiler pipeline, and the steam valve is arranged at the rear side of the water outlet valve.
Preferably, the bridge prefabrication field circulating automatic spraying maintenance system further comprises a sedimentation tank, a plurality of collecting tanks and a plurality of water collecting tanks, wherein the plurality of water collecting tanks are respectively arranged on two sides of the bridge prefabrication pedestal, the plurality of water collecting tanks are respectively connected with the corresponding collecting tanks through water collecting pipes, the plurality of collecting tanks are connected with the sedimentation tank through sewage pipes, the sedimentation tank is adjacent to the water tank, and the sedimentation tank is communicated with the middle lower portion of the water tank.
Compared with the prior art, the utility model has the beneficial effects that:
the bridge prefabrication field circulation type automatic spraying maintenance system provided by the utility model not only can effectively utilize redundant maintenance water and realize spraying maintenance of concrete prefabrication components, thereby playing a role in saving water, but also can reduce equipment investment by combining spraying maintenance and steam maintenance into a whole, and can realize synchronous front-back movement of the positions of a plurality of second spray heads through the adjustment of the adjusting mechanism by the design of a plurality of adjustable spraying units, so that the uniformity of a spraying process is increased.
Drawings
Fig. 1 is a schematic structural diagram of a bridge prefabrication field circulation type automatic spraying maintenance system provided by an embodiment of the utility model;
FIG. 2 is a cross-sectional view of a bridge prefabrication pedestal in an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a connection structure between a bridge prefabrication pedestal and an adjustable spraying unit in an embodiment of the utility model;
FIG. 4 is a top view of an adjustable spray unit in an embodiment of the utility model;
FIG. 5 is an enlarged partial schematic view of portion A of FIG. 3;
FIG. 6 is an enlarged partial cross-sectional view of portion A of FIG. 3;
in the figure: 1. the water pipe is divided into a pipe; 2. bridge prefabrication pedestal; 3. a water outlet; 4. an adjustable spray unit; 5. a support base; 6. a support rod; 7. a first water pipe; 8. a second water pipe; 9. a third water pipe; 10. a first nozzle; 11. an adjusting mechanism; 12. a second nozzle; 13. a fixing plate; 14. a screw; 15. an internally threaded tube; 16. a limiting plate; 17. a fourth water pipe; 18. a hose; 19. a guide rod; 20. a guide ring; 21. a drive gear; 22. a motor; 23. a rotating lever; 24. a drive belt; 25. a driven gear; 26. a water tank; 27. a water pipe main pipe; 28. a booster pump; 29. a water pressure gauge; 30. a water pressure regulating valve; 31. a water outlet valve; 32. a time relay; 33. a steam valve; 34. a steam boiler pipe; 35. a steam boiler; 36. a sedimentation tank; 37. a collecting tank; 38. a water collection tank; 39. a water collecting pipe; 40. a sewage pipe.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to 6, the embodiment of the utility model provides a bridge prefabrication field circulation type automatic spraying maintenance system, which comprises a plurality of water pipe branch pipes 1, wherein the plurality of water pipe branch pipes 1 are respectively arranged in corresponding bridge prefabrication pedestal 2, a plurality of water outlets 3 communicated with the water pipe branch pipes 1 are arranged in the bridge prefabrication pedestal 2 at intervals, adjustable spraying units 4 are respectively and symmetrically arranged on two sides of the bridge prefabrication pedestal 2, and each adjustable spraying unit 4 is connected with a plurality of water outlets 3 corresponding to the same side.
Each adjustable spraying unit 4 comprises a supporting seat 5, a plurality of supporting rods 6, a plurality of first water pipes 7, a plurality of second water pipes 8, a plurality of third water pipes 9, a plurality of first spray heads 10, a plurality of adjusting mechanisms 11 and a plurality of second spray heads 12, wherein the supporting seat 5 is arranged on the outer side of the bridge prefabrication pedestal 2, the supporting rods 6 are vertically arranged at the top of the supporting seat 5 at intervals along the length direction of the supporting seat 5, one ends of the plurality of first water pipes 7 are connected with corresponding water outlets 3, the other ends of the plurality of first water pipes are connected with the third water pipes 9, the second water pipes 8 are communicated with the first water pipes 7, the second water pipes 8 are positioned between the first water pipes 7 and the third water pipes 9, the second water pipes 8 are connected with corresponding first spray heads 10, each first water pipe 7 is fixed with the corresponding supporting rod 6, the plurality of adjusting mechanisms 11 are respectively arranged at the end parts of the corresponding third water pipes 9, each adjusting mechanism 11 is connected with the corresponding second spray heads 12, and the plurality of adjusting mechanisms 11 are connected through driving mechanisms.
Each adjusting mechanism 11 comprises a fixing plate 13, a screw rod 14, an inner thread pipe 15, a limiting plate 16, a fourth water pipe 17, a hose 18, a guide rod 19 and a guide ring 20, wherein the fixing plate 13 is arranged at the top of the third water pipe 9, the screw rod 14 is rotationally connected with the inner wall of the fixing plate 13, the other end of the screw rod 14 is sleeved with the inner thread pipe 15, the limiting plate 16 is arranged at the bottom of the inner thread pipe 15, the fourth water pipe 17 is fixedly arranged at the bottom of the limiting plate 16, the guide rod 19 is arranged at the bottom of the fourth water pipe 17, the guide rod 19 is of an L-shaped structure, the guide ring 20 is fixedly arranged at the bottom of the third water pipe 9, the other end of the guide rod 19 is movably inserted with the guide ring 20, one end of the hose 18 is connected with the third water pipe 9, the other end of the hose 18 is connected with the fourth water pipe 17, and the other end of the fourth water pipe 17 is connected with the second spray head 12.
The driving mechanism comprises a driving gear 21, a motor 22, a rotating rod 23, a transmission belt 24 and a plurality of driven gears 25, wherein an output shaft of the motor 22 is fixedly connected with the rotating rod 23 through a coupler, the driving gear 21 is arranged on the rotating rod 23, the driven gears 25 are respectively and correspondingly arranged on the screw rods 14, and the driving gear 21 and the driven gears 25 are connected through the transmission belt 24.
The bridge prefabrication field circulating automatic spraying maintenance system provided by the embodiment of the utility model further comprises a water tank 26 and a water pipe main pipe 27, wherein the water tank 26 is respectively communicated with the plurality of water pipe branch pipes 1 through the water pipe main pipe 27.
The water pipe is responsible for 27 and has set gradually booster pump 28, water pressure gauge 29, water pressure regulating valve 30 and play water valve 31, and booster pump 28 sets up in water tank 26, and booster pump 28 external time relay 32, time relay 32 installs in the control box.
The main pipe 27 is provided with a steam valve 33, the steam valve 33 is externally connected with a steam boiler 35 through a steam boiler pipeline 34, and the steam valve 33 is arranged at the rear side of the outlet valve 31.
The bridge prefabrication field circulation type automatic spraying maintenance system provided by the embodiment of the utility model further comprises a sedimentation tank 36, a plurality of collecting tanks 37 and a plurality of water collecting tanks 38, wherein the plurality of water collecting tanks 38 are respectively arranged on two sides of the bridge prefabrication pedestal 2, the plurality of water collecting tanks 38 are respectively connected with the corresponding collecting tanks 37 through water collecting pipes 39, the plurality of collecting tanks 37 are connected with the sedimentation tank 36 through sewage pipes 40, the sedimentation tank 36 is arranged adjacent to the water tank 26, and the sedimentation tank 36 is communicated with the middle lower part of the water tank 26.
When the bridge prefabrication field circulation type automatic spraying maintenance system provided by the embodiment of the utility model is used, when spraying maintenance is needed, the booster pump 28 is started firstly, then the spraying time is set according to the air temperature and the air humidity, the water pressure regulating valve 30 is regulated according to the number of the beam plates sprayed at the same time, the water inlet valve below the bridge prefabrication pedestal 2 corresponding to the beam plates to be sprayed for maintenance is opened, the spraying system can start automatic spraying maintenance through the first spray head 10 and the second spray head 12, the motor 22 is started to intermittently rotate positively and negatively to drive the driving gear 21 to rotate, the driving gear 21 rotates to drive the driving belt 24 to rotate, the driving belt 24 synchronously drives the driven gears 25 to rotate, the driven gears rotate to drive the screws 14 to rotate, and the internal thread pipe 15 moves back and forth along the width direction of the beam plates under the action of the guide rod 19 and the guide ring 20, so that the second spray head 12 moves back and forth, and the uniformity of spraying on the upper side surfaces of the beam plates in the spraying process is improved.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The utility model provides a bridge prefabrication field circulation formula automatic spray maintenance system, includes a plurality of water piping branch pipe (1), a plurality of water piping branch pipe (1) set up respectively in bridge prefabrication pedestal (2) that correspond, and the interval is provided with a plurality of delivery ports (3) that are linked together with water piping branch pipe (1) in bridge prefabrication pedestal (2), its characterized in that, the both sides of bridge prefabrication pedestal (2) are provided with adjustable spraying unit (4) respectively symmetry, and every adjustable spraying unit (4) all are connected with a plurality of delivery ports (3) that correspond with the homonymy.
2. The bridge prefabrication field circulation type automatic spraying maintenance system according to claim 1, wherein each adjustable spraying unit (4) comprises a supporting seat (5), a plurality of supporting rods (6), a plurality of first water pipes (7), a plurality of second water pipes (8), a plurality of third water pipes (9), a plurality of first spray heads (10), a plurality of adjusting mechanisms (11) and a plurality of second spray heads (12), the supporting seat (5) is arranged on the outer side of the bridge prefabrication pedestal (2), the supporting rods (6) are vertically arranged at the top of the supporting seat (5) along the length direction of the supporting seat (5) at intervals, one ends of the plurality of first water pipes (7) are connected with corresponding water outlets (3), the other ends of the plurality of first water pipes (7) are connected with the third water pipes (9), the second water pipes (8) are communicated with the first water pipes (7), the second water pipes (8) are located between the first water pipes (7) and the third water pipes (9), the second water pipes (8) are connected with the corresponding first spray heads (10), and each first water pipe (7) is connected with the corresponding adjusting mechanism (11).
3. The bridge prefabrication field circulation type automatic spraying maintenance system according to claim 2, wherein each adjusting mechanism (11) comprises a fixed plate (13), a screw rod (14), an inner threaded pipe (15), a limiting plate (16), a fourth water pipe (17), a hose (18), a guide rod (19) and a guide ring (20), the fixed plate (13) is arranged at the top of the third water pipe (9), the screw rod (14) is rotatably connected with the inner wall of the fixed plate (13), the other end of the screw rod (14) is sleeved with the inner threaded pipe (15), the limiting plate (16) is arranged at the bottom of the inner threaded pipe (15), the fourth water pipe (17) is fixedly arranged at the bottom of the limiting plate (16), the guide rod (19) is arranged at the bottom of the fourth water pipe (17), the guide rod (19) is of an L-shaped structure, the guide ring (20) is fixedly arranged at the bottom of the third water pipe (9), the other end of the guide rod (19) is movably spliced with the guide ring (20), one end of the hose (18) is connected with the third water pipe (9), the other end of the hose (18) is connected with the fourth water pipe (17), and the fourth water pipe (17) is connected with the fourth water pipe (17).
4. The bridge prefabrication field circulation type automatic spraying maintenance system according to claim 3, wherein the driving mechanism comprises a driving gear (21), a motor (22), a rotating rod (23), a transmission belt (24) and a plurality of driven gears (25), an output shaft of the motor (22) is fixedly connected with the rotating rod (23) through a coupler, the driving gear (21) is arranged on the rotating rod (23), the driven gears (25) are respectively correspondingly arranged on the screws (14), and the driving gear (21) and the driven gears (25) are connected through the transmission belt (24).
5. The bridge prefabrication field circulation type automatic spraying maintenance system according to claim 1, further comprising a water tank (26) and a water pipe main pipe (27), wherein the water tank (26) is respectively communicated with the plurality of water pipe branch pipes (1) through the water pipe main pipe (27).
6. The bridge prefabrication field circulation type automatic spraying maintenance system according to claim 5, wherein a booster pump (28), a water pressure meter (29), a water pressure regulating valve (30) and a water outlet valve (31) are sequentially arranged on the water pipe main pipe (27), the booster pump (28) is arranged in the water tank (26), the booster pump (28) is externally connected with a time relay (32), and the time relay (32) is arranged in the control box.
7. The bridge prefabrication yard circulating type automatic spraying maintenance system according to claim 6, wherein a steam valve (33) is arranged on the main pipe (27), the steam valve (33) is externally connected with a steam boiler (35) through a steam boiler pipeline (34), and the steam valve (33) is arranged on the rear side of the water outlet valve (31).
8. The bridge girder prefabricated field circulation type automatic spraying maintenance system according to claim 6, further comprising a sedimentation tank (36), a plurality of collecting tanks (37) and a plurality of water collecting tanks (38), wherein the plurality of water collecting tanks (38) are respectively arranged on two sides of the bridge girder prefabricated pedestal (2), the plurality of water collecting tanks (38) are respectively connected with the corresponding collecting tanks (37) through water collecting pipes (39), the plurality of collecting tanks (37) are connected with the sedimentation tank (36) through sewage pipes (40), the sedimentation tank (36) is arranged adjacent to the water tank (26), and the sedimentation tank (36) is communicated with the middle lower part of the water tank (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320617357.9U CN219748428U (en) | 2023-03-27 | 2023-03-27 | Bridge prefabrication field circulation type automatic spraying maintenance system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320617357.9U CN219748428U (en) | 2023-03-27 | 2023-03-27 | Bridge prefabrication field circulation type automatic spraying maintenance system |
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| CN219748428U true CN219748428U (en) | 2023-09-26 |
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| CN202320617357.9U Active CN219748428U (en) | 2023-03-27 | 2023-03-27 | Bridge prefabrication field circulation type automatic spraying maintenance system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986680A (en) * | 2022-07-04 | 2022-09-02 | 中交二航局第四工程有限公司安徽混凝土装配化构件分公司 | Circulating automatic spray maintenance system in prefabricated bridge prefabrication field |
-
2023
- 2023-03-27 CN CN202320617357.9U patent/CN219748428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986680A (en) * | 2022-07-04 | 2022-09-02 | 中交二航局第四工程有限公司安徽混凝土装配化构件分公司 | Circulating automatic spray maintenance system in prefabricated bridge prefabrication field |
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