Steam heat preservation curing device and system for super-toughness concrete

Abstract

A steam heat preservation curing device and system for super-toughness concrete are used for curing a bridge deck structure, and the device comprises a vertical support, walking rollers, a shear fork type telescopic assembly, a suspension, a steam spraying device and waterproof heat preservation cloth. The vertical support comprises a triangular truss extending in the left-right direction and vertical legs erecting the triangular truss, and the lower ends of the vertical legs are installed on walking idler wheels walking on the bridge floor. The vertical legs of the adjacent vertical brackets are connected through a scissor type telescopic assembly; the steam spraying device comprises two plastic corrugated hoses and a plurality of mutually parallel steam spraying pipes; the waterproof heat preservation cloth is laid on all the vertical supports to form a maintenance space. The frame, the waterproof heat preservation cloth and the steam spraying device can be folded front and back, the steam spraying device can move horizontally on the road surface along with the frame, and the novel orthotropic steel plate-ultrahigh toughness concrete combined bridge deck structure maintenance device is particularly suitable for maintenance of a novel orthotropic steel plate-ultrahigh toughness concrete combined bridge deck structure and belongs to the technical field of building construction devices.

Description

Technical Field

[0001] The utility model relates to a molding technology for a mixture containing cement materials, and also to a construction device, in particular to a steam insulation curing device and system for ultra-tough concrete, which is specially used for curing orthotropic steel plate-ultra-high-toughness concrete composite bridge deck structures. Background Art

[0002] With the development of bridge technology, steel-concrete composite bridges have demonstrated excellent structural performance and durability, offering ease of construction and rapid progress. Their diverse structures adapt to varying construction conditions, while simplified construction reduces the workload of bridge construction and maintenance management. Consequently, they have experienced rapid development and application in China in recent years. However, the low local stiffness of the deck structure, along with its complex construction and numerous welds, can lead to fatigue cracking under the repeated impact of heavy vehicles. Furthermore, heavy vehicles cause significant stress and deformation in the asphalt concrete pavement, which can easily lead to pavement cracking and adhesive failure.

[0003] To comprehensively address the problem of steel bridge deck defects, ultra-high-toughness concrete has been developed, and a new composite bridge deck structure combining orthotropic steel plates and ultra-high-toughness concrete has been proposed. This technology significantly improves local stiffness, significantly reducing live load stresses and the risk of fatigue cracking in the structural details of orthotropic steel bridge decks. Furthermore, compared to expensive and frequently replaced asphalt concrete pavements, the new composite bridge deck structure offers a longer service life and superior durability, resolving the challenge of asphalt pavement damage in orthotropic steel bridge decks.

[0004] Ultra-high-toughness concrete requires high-temperature steam curing, which essentially completes the cement hydration reaction during the curing period. This reduces the material's subsequent shrinkage to virtually zero, significantly reducing creep deformation. Furthermore, steam curing reduces porosity, increasing both compressive and tensile strength by approximately 10%, thereby enhancing durability. Furthermore, after steam curing, ultra-high-toughness concrete reaches its final strength immediately, eliminating the need for a 28-day wait, significantly shortening construction timelines.

[0005] Prior art curing devices exist, such as CN214574662U, which discloses a mobile, retractable steam-curing shed for PCCP pipe mortar protective layers. First, this shed is used to cure prefabricated components, which are much smaller than bridge deck structures, making it unsuitable for curing bridge deck structures. Second, the new orthotropic steel plate-ultra-high-toughness concrete composite bridge deck structure uses a flow-through, segmented construction process, with curing taking place as soon as one section is completed. However, the steam-curing shed's steam pipes are laid on the ground, making it unsuitable for curing bridge deck structures. Finally, the curing process for PCCP pipe mortar protective layers is unsuitable for curing ultra-high-toughness concrete.

[0006] Therefore, a steam insulation curing device dedicated to orthotropic steel plate-ultra-high toughness concrete composite bridge deck structure is needed. Utility Model Content

[0007] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a steam insulation curing device and system for super-tough concrete, which is foldable as a whole and movable on the road surface as a whole.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A steam insulation curing device for super-tough concrete is used for curing bridge deck structures, comprising vertical supports, walking rollers, scissor-type telescopic components, suspensions, steam spray devices, and waterproof insulation cloth; the vertical supports comprise a triangular truss extending in the left-right direction and vertical legs that support the triangular truss, the lower ends of the vertical legs being mounted on walking rollers that travel on the bridge deck; the vertical legs of adjacent vertical supports are connected via a scissor-type telescopic component to enable adjacent vertical supports to move away from or closer in the front-to-back direction; the steam spray device comprises two plastic corrugated hoses and a plurality of mutually parallel steam spray pipes, with a plurality of spray holes provided on the steam spray pipes; the steam spray pipes extending in the left-right direction are suspended and mounted below the triangular truss, the left ends of the plurality of steam spray pipes being connected to a plastic corrugated hose, and the right ends of the plurality of steam spray pipes being connected to another plastic corrugated hose; the waterproof insulation cloth is laid on all vertical supports to form a curing space.

[0010] As a preferred embodiment, the vertical support includes a triangular truss and two left and right vertical legs, and corner reinforcements are provided between the vertical legs and the triangular truss.

[0011] As a preferred embodiment, the walking roller is a rubber-wrapped wheel or a plastic wheel.

[0012] As a preferred embodiment, the scissors-type telescopic assembly includes multiple steel bars, movable sleeves, and locking screws; the middle parts of two steel bars are hinged to form an X-shaped unit, and the ends of the front and rear adjacent X-shaped units are hinged to each other to form a scissors-type telescopic structure. The scissors-type telescopic structure has two connections with the vertical leg. At the lower connection, the scissors-type telescopic structure is fixedly connected to the vertical leg, and at the upper connection, the scissors-type telescopic structure is fixedly connected to the movable sleeve. The movable sleeve is sleeved on the outside of the vertical leg and is slidably connected to the vertical leg; the locking screw locks the movable sleeve on the vertical leg.

[0013] As a preference, the suspension includes steel sheets and steel pipes, the steel pipes arranged axially along the left-right direction are fixed below the vertical bracket through the steel sheets, and the steam spray pipe passes through the steel pipes.

[0014] As a preferred embodiment, the steam spray pipe is a PVC pipe, and pressure control valves are first installed at both ends of the steam spray pipe and then connected to a plastic corrugated hose.

[0015] As a preferred embodiment, the plastic corrugated hose is connected to the steam generating device.

[0016] As a preferred embodiment, the triangular truss is welded with multiple anti-corrosion square steel pipes that are galvanized inside and outside, and the vertical legs are made of anti-corrosion square steel pipes that are galvanized inside and outside. The triangular truss and the vertical legs are connected by welding.

[0017] As a preference, the number of waterproof insulation cloths is at least one; when more than two waterproof insulation cloths are used, the overlap between adjacent waterproof insulation cloths is not less than 30 cm.

[0018] A steam thermal insulation curing system for ultra-tough concrete comprises at least two steam thermal insulation curing devices for ultra-tough concrete; the number of waterproof thermal insulation cloths in all steam thermal insulation curing devices is at least one; when more than two waterproof thermal insulation cloths are used, the overlap between adjacent waterproof thermal insulation cloths is not less than 30 cm.

[0019] The principle of this utility model is:

[0020] In a composite bridge deck structure of orthotropic steel plates and ultra-high-toughness concrete, the road surface is constructed in a continuous, segmented manner. As one section is completed, maintenance begins while the next section is constructed simultaneously, and this process is repeated repeatedly to complete the entire section. Therefore, the entire maintenance device must be moved directly on the bridge deck. Furthermore, since the construction target is the road surface, the maintenance device's coverage area must be sufficiently large. This new maintenance device features a foldable, mobile steam spray device suitable for movement on the bridge deck. It also incorporates a modular splicing maintenance system suitable for maintaining large road surfaces, achieving an optimal balance between support strength, ease of construction, and maintenance efficiency.

[0021] The utility model has the following advantages:

[0022] 1. Not only are the frame and waterproof insulation cloth foldable, but the steam spray device can also be folded forward and backward along with the frame. The steam spray device can also be translated along with the frame on the road surface. It is suitable for the maintenance of water-flowing and segmented road surfaces, especially for the maintenance of new orthotropic steel plate-ultra-high toughness concrete composite bridge deck structures.

[0023] 2. The device is equipped with walking rollers. When the construction site adopts flow-through segmentation operation, there is no need to re-fold and unfold it, and it can be directly dragged to the next working surface.

[0024] 3. Simple structure, easy operation, saves manpower input, can quickly complete the unfolding, fixing and storage work, can be folded and stored when not in use, saving on-site space.

[0025] 4. The device uses rubber-wrapped wheels or plastic wheels to protect the road surface.

[0026] 5. Pressure control valves are installed at both ends of the steam spray pipe. By setting the pressure difference between the upstream and downstream valves, it is ensured that steam can be sprayed relatively evenly at all positions within the coverage area of ​​the device.

[0027] 6. A maintenance system consisting of multiple devices is used in conjunction with a large area of ​​waterproof and thermal insulation cloth to achieve steam maintenance over a larger area. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the steam insulation maintenance device when the waterproof insulation cloth is not laid.

[0029] Figure 2 It is a three-dimensional diagram of the steam insulation maintenance device when laying waterproof insulation cloth.

[0030] Figure 3 It is a schematic diagram of the steam insulation curing device in the stored state.

[0031] Figure 4 It is a schematic diagram of the steam insulation curing device in the unfolded state.

[0032] Figure 5 This is the assembly drawing of the vertical bracket and steam spray pipe.

[0033] Figure 6 It is a bottom view of the steam spray pipe.

[0034] Figure 7 This is a partial enlarged view of the connection between the vertical bracket and the walking roller.

[0035] Figure 8 This is a partial enlarged view of the connection between the plastic corrugated hose and the steam spray pipe.

[0036] In the figure, 1-triangular truss, 2-leg, 3-scissor-type telescopic assembly, 4-walking roller, 5-corner reinforcement, 6-plastic corrugated hose, 7-pressure control valve, 8-steam spray pipe, 9-suspension, 10-locking screw, 11-waterproof insulation cloth, 12-spray hole. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to specific implementation methods.

[0038] Example 1

[0039] A steam insulation curing device for super-tough concrete is used for curing bridge deck structures, comprising vertical supports, walking rollers, scissor-type telescopic components, suspensions, steam spray devices, and waterproof insulation cloth; the vertical supports comprise a triangular truss extending in the left-right direction and vertical legs that support the triangular truss, the lower ends of the vertical legs being mounted on walking rollers that travel on the bridge deck; the vertical legs of adjacent vertical supports are connected via a scissor-type telescopic component to enable adjacent vertical supports to move away from or closer in the front-to-back direction; the steam spray device comprises two plastic corrugated hoses and a plurality of mutually parallel steam spray pipes, with a plurality of spray holes provided on the steam spray pipes; the steam spray pipes extending in the left-right direction are suspended and mounted below the triangular truss, the left ends of the plurality of steam spray pipes being connected to a plastic corrugated hose, and the right ends of the plurality of steam spray pipes being connected to another plastic corrugated hose; the waterproof insulation cloth is laid on all vertical supports to form a curing space.

[0040] The vertical support comprises a triangular truss and two left and right vertical legs, and a corner reinforcement is provided between the vertical legs and the triangular truss. In this embodiment, the corner reinforcement is a galvanized angle steel reinforced by welding.

[0041] The walking roller adopts the wheel or the plastic wheel of rubber parcel. In the present embodiment, the walking roller can directly be purchased as finished product, is connected with the lower end of the vertical leg by bolt and nut.

[0042] The scissor-type telescopic assembly consists of multiple steel bars, a movable sleeve, and a locking screw. Two steel bars are hinged at the center to form an X-shaped unit. The ends of the adjacent X-shaped units are hinged to each other to form a scissor-type telescopic structure. The scissor-type telescopic structure has two connections to the legs: the lower connection is fixed to the legs, and the upper connection is fixed to the movable sleeve. The movable sleeve slides over the legs and slides into the legs. The locking screw secures the movable sleeve to the legs. In this embodiment, steel bars are 3mm thick, 20mm wide, and 300mm long. Holes are opened at both ends and in the middle of the bars for the hinged connection. Each scissor-type telescopic assembly consists of 12 steel bars, which are painted for corrosion protection. Threaded holes are provided in the movable sleeve for the locking screw. By locking the movable sleeve in place on the legs, the distance between the two vertical supports is fixed, ensuring a stable connection. When the two scissor-type telescopic assemblies share the middle leg, they also share a movable sleeve.

[0043] The suspension consists of steel plates and steel pipes. The steel pipes, oriented axially in the left-right direction, are secured to the underside of the vertical brackets via the steel plates. The steam spray pipes pass through the steel pipes. In this embodiment, the inner diameter of the steel pipes is slightly larger than the steam spray pipes to facilitate replacement and maintenance. The steel pipes, steel plates, and triangular trusses are welded in sequence. The steel pipes are located on the lower crossbeam of the triangular trusses, one-quarter the length of the two end beams.

[0044] The steam spray pipe is a PVC pipe. Pressure control valves are installed at both ends of the steam spray pipe, and then connected to the plastic corrugated hose. In this embodiment, the upstream pressure control valve has a small opening, while the downstream pressure control valve has a large opening to prevent steam from reaching the downstream steam spray pipe.

[0045] The plastic corrugated hose is connected to the steam generator. Those skilled in the art can design a plastic corrugated hose to connect to several steam generators based on the curing conditions, determine the location of the steam generators connected to the plastic corrugated hose, and set the plugs and tees. As long as a connected steam system is established and steam is evenly sprayed, thus meeting the curing conditions, it will be sufficient.

[0046] The triangular truss is welded with multiple anti-corrosion square steel pipes that are galvanized inside and outside. The vertical legs are made of anti-corrosion square steel pipes that are galvanized inside and outside. The triangular truss and the vertical legs are connected by welding.

[0047] The number of waterproof insulation sheets should be at least one. When using two or more, the overlap between adjacent sheets should be no less than 30 cm. In this embodiment, two sheets, 8 m long and 6 m wide, are used to cover each vertical support, completely covering all vertical supports. While the device is in motion, the hanging insulation sheets can be folded over to the top. Upon reaching the maintenance area, they can be folded back to a drooping position. Sheets that droop to the ground are held down with wooden planks.

[0048] When in use, stretch the unit forward and backward, lock it, and cover it with a waterproof insulation sheet. To store, remove the insulation sheet, unlock it, and compress it forward and backward. When stored, the distance between the two vertical supports is approximately 20 to 25 cm. When unfolded, ensure the steel bars of the X-shaped unit are at an angle of approximately 60 degrees. The distance between the two vertical supports can be extended to approximately 150 cm. The waterproof insulation sheet is folded and stored separately.

[0049] Example 2

[0050] A steam thermal insulation curing system for ultra-tough concrete comprises at least two steam thermal insulation curing devices for ultra-tough concrete; the number of waterproof thermal insulation cloths in all steam thermal insulation curing devices is at least one; when more than two waterproof thermal insulation cloths are used, the overlap between adjacent waterproof thermal insulation cloths is not less than 30 cm.

[0051] Here’s how to use it:

[0052] The number of curing devices to be used and the number and size of waterproof insulation sheets required are determined based on the actual amount of super-tough concrete poured on site. Curing devices and materials must arrive on site in the planned quantities, in advance of the super-tough concrete pour.

[0053] Set the steam pressure according to the number of maintenance devices planned to be used, and debug the pressure control valves at both ends of each steam spray pipe in advance to ensure that the steam is evenly sprayed in the protected area.

[0054] During pavement construction, after the concrete has finally set and the moisturizing membrane has been removed, the vertical supports should be quickly deployed, the movable sleeves of the scissor-type telescopic components should be locked, and the waterproof insulation sheeting should be quickly installed as planned. When using multiple sheets, the overlap between adjacent sheets should be at least 30 cm.

[0055] After maintenance is completed, for construction sites with water flow and segmented operations, the drooping waterproof insulation cloth can be folded to the top of the bracket and dragged as a whole to the next maintenance area for the next stage of construction.

[0056] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A steam heat preservation device for ultra-tough concrete, used for the maintenance of bridge deck structures, characterized by: It includes vertical supports, walking rollers, scissor-type telescopic components, suspension, steam spray device, and waterproof insulation cloth; the vertical supports include a triangular truss extending in the left and right directions and vertical legs that support the triangular truss, and the lower ends of the vertical legs are installed on walking rollers that walk on the bridge deck; the vertical legs of adjacent vertical supports are connected by a scissor-type telescopic component to achieve the separation or approach of adjacent vertical supports in the front and rear directions; the steam spray device includes two plastic corrugated hoses and multiple parallel steam spray pipes, and multiple spray holes are provided on the steam spray pipes; the steam spray pipes extending in the left and right directions are installed under the triangular truss through suspension, and the left ends of the multiple steam spray pipes are connected to a plastic corrugated hose, and the right ends of the multiple steam spray pipes are connected to another plastic corrugated hose; waterproof insulation cloth is laid on all vertical supports to form a maintenance space.

2. A steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The vertical support comprises a triangular truss and two left and right vertical legs, and corner reinforcements are provided between the vertical legs and the triangular truss.

3. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The travel rollers are rubber-wrapped wheels or plastic wheels.

4. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The scissors-type telescopic assembly includes multiple steel bars, movable sleeves, and locking screws; the middle parts of the two steel bars are hinged to form an X-shaped unit, and the ends of the front and rear adjacent X-shaped units are hinged to each other to form a scissors-type telescopic structure. The scissors-type telescopic structure has two connections with the vertical leg. At the lower connection, the scissors-type telescopic structure is fixedly connected to the vertical leg, and at the upper connection, the scissors-type telescopic structure is fixedly connected to the movable sleeve. The movable sleeve is sleeved on the outside of the vertical leg and is slidably connected to the vertical leg; the locking screw locks the movable sleeve on the vertical leg.

5. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The suspension includes steel sheets and steel pipes. The steel pipes arranged axially along the left and right directions are fixed below the vertical bracket through the steel sheets, and the steam spray pipes pass through the steel pipes.

6. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The steam spray pipe is a PVC pipe. Pressure control valves are first installed at both ends of the steam spray pipe, and then connected to a plastic corrugated hose.

7. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The plastic corrugated hose is connected to the steam generating device.

8. The steam heat preservation and curing device for ultra-tough concrete according to claim 2, characterized in that: The triangular truss is welded with multiple anti-corrosion square steel pipes that are galvanized inside and outside. The vertical legs are made of anti-corrosion square steel pipes that are galvanized inside and outside. The triangular truss and the vertical legs are connected by welding.

9. The steam heat preservation and curing device for ultra-tough concrete according to claim 1, characterized in that: The number of waterproof insulation cloths shall be at least one; when more than two waterproof insulation cloths are used, the overlap between adjacent waterproof insulation cloths shall be no less than 30cm.

10. A steam thermal insulation curing system for ultra-tough concrete, characterized by: The invention comprises at least two steam thermal insulation curing devices for ultra-tough concrete according to any one of claims 1 to 8; the number of waterproof thermal insulation cloths of all steam thermal insulation curing devices is at least one; when more than two waterproof thermal insulation cloths are used, the overlap between adjacent waterproof thermal insulation cloths is not less than 30 cm.

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