Concrete curing device for highway engineering construction

Abstract

The invention relates to the technical field of concrete curing, and particularly discloses a concrete curing device for highway engineering construction, which comprises a curing device main body, the concrete curing device for highway engineering construction comprises a curing device body, a plurality of containing bins are formed in the curing device body, the bottoms of the containing bins are fixedly connected with supporting boxes and pre-detection mechanisms, the pre-detection mechanisms are located in the containing bins, and the curing mechanisms are connected with the supporting boxes. Wet geotechnical cloth does not need to be manually filled, special maintenance equipment is customized for different components, the equipment input cost is reduced, the requirement for batch production of a prefabricating field is met, the geotechnical cloth sleeve of the abutting piece is flexibly attached to the surfaces of the components, steam is doubly conveyed through a spray head and the geotechnical cloth sleeve, and the self-adaptive adjustment of the angle and the flow is combined, so that the production efficiency is improved. Concave parts, protrusions, bottoms and other parts can obtain uniform temperature and humidity, and steam is prevented from directly impacting the surface of the component and accumulated water in the concave parts.

Description

Technical Field

[0001] This invention relates to the field of concrete curing technology, specifically to a concrete curing device for highway construction. Background Technology

[0002] Concrete is an artificial stone material formed by mixing cementitious materials (mainly cement), aggregates (sand and stone), water, and, if necessary, admixtures / admixtures in a certain proportion, and then hardening it through mixing, pouring, and curing.

[0003] In highway construction, in order to improve construction efficiency and ensure project quality, concrete components for highway projects are produced in prefabrication yards. This not only avoids the impact of weather differences on on-site concrete casting, but also allows for mass production in advance, which can be carried out in parallel with on-site roadbed and foundation construction. On-site, only hoisting and splicing are required, without waiting for the concrete curing period.

[0004] In the process of producing concrete components for highway engineering in a prefabrication yard, curing devices are required to cure the concrete. The commonly used curing process is as follows: 1. Pre-curing stage: After pouring, the concrete is left to stand to allow it to set initially and avoid cracking due to excessive temperature rise; 2. Heating stage: Steam is introduced into the curing device to slowly raise the ambient temperature and initiate the cement hydration reaction; 3. Constant temperature stage: The steam system is intermittently replenished to maintain suitable temperature and humidity, allowing the concrete strength to increase rapidly; 4. Cooling stage: The steam is turned off, and the ventilation openings of the curing device are gradually opened to avoid shrinkage cracks caused by excessive temperature differences between the inside and outside of the component.

[0005] Existing curing devices typically have nozzles fixed to the top or side. While this allows for uniform coverage of most regular concrete components, it is ineffective for irregularly shaped components with grooves, holes, or protruding ribs. These irregular components lack a uniform, flat contact surface, creating shadow areas after stacking. The steam is blocked by the components themselves, only able to "circulate" around the surface and unable to reach the interior or recessed areas. This forces workers to manually stuff wet geotextile into the recesses and adjust the placement angle of these irregularly shaped concrete components to reduce blind spots, increasing labor costs and hindering the mass production of concrete components. Therefore, we propose a concrete curing device for highway engineering construction. Summary of the Invention

[0006] The purpose of this invention is to provide a concrete curing device for highway engineering construction, in order to reduce blind spots when curing these irregularly shaped concrete components, it is necessary to manually stuff wet geotextile into the recesses of the irregularly shaped components and adjust the placement angle, which not only increases labor costs but also affects the mass production of concrete components.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a concrete curing device for highway construction, comprising a curing device body; the curing device body has multiple placement chambers inside, a support box is fixedly connected to the bottom of the placement chamber, the support box has protrusions at both ends, and a geotextile sheet is fixedly connected above the protrusions, the geotextile sheet covering the protrusions of the support box; The pre-inspection mechanism is located inside the placement chamber. After the concrete component is placed above the support box, the pre-inspection mechanism detects the shape of the concrete component and fits the surface of the component. The curing mechanism is connected to the support box. The main body of the curing device supplies steam to the placement chamber through the curing mechanism. When the pre-inspection mechanism is in contact with the surface of the concrete component, the pre-inspection mechanism adjusts the angle of the steam supplied by the curing mechanism according to the unevenness of the concrete component surface.

[0008] The pre-inspection mechanism includes an upper cover plate, with a pneumatic telescopic rod 1 fixedly connected to the top of the upper cover plate. The pneumatic telescopic rod 1 is fixed to the top of the placement chamber. The upper cover plate is located above the support box. Multiple movable plates are provided on the inner wall of the upper cover plate and the top of the support box. The multiple movable plates are distributed around the outer side of the concrete component. A pneumatic telescopic rod 2 is fixedly connected to the outer side of the movable plate. The ends of the multiple pneumatic telescopic rods 2 away from the movable plates are fixed to the support box and the inner wall of the upper cover plate, respectively. Multiple abutting parts are provided on the side of the movable plate away from the pneumatic telescopic rods 2. The multiple abutting parts are arranged in an array on the surface of the movable plate.

[0009] The abutment includes a fixed cylinder that is fixedly connected to the movable plate. A telescopic column is slidably and sealingly connected to the inner wall of the fixed cylinder. A return spring is fixedly connected to one end of the telescopic column near the fixed cylinder. The end of the return spring away from the telescopic column is fixed to the fixed cylinder. A geotextile sleeve is fixedly connected to the outer side of the fixed cylinder. The center of the geotextile sleeve is fixed to the telescopic column.

[0010] The geotextile sleeve is initially conical in shape.

[0011] The maintenance mechanism includes multiple nozzles, which are located on the outer side of the end of the fixed cylinder. The nozzles are connected to an air supply pipe near the end of the fixed cylinder. The air supply pipe is a Y-shaped pipe and is connected to the nozzle, the fixed cylinder, and the geotextile sleeve. The multiple fixed cylinders located in the same movable plate are connected by connecting pipes. One of the fixed cylinders is connected to an air inlet pipe on its outer side. The air inlet pipe is connected to the main body of the maintenance device. The outer side of the fixed cylinder is equipped with an adjustment component that adjusts the direction of the nozzle according to the movement range of the telescopic column.

[0012] The adjusting component includes a support frame fixedly connected to the surface of the fixed cylinder, rotating shafts fixedly connected to both sides of the nozzle, rotating shafts rotatably connected to the inner wall of the support frame, a gear 1 fixedly connected to one end of the rotating shaft away from the nozzle, a rack fixedly connected to the outside of the telescopic column, and a transmission component provided between the rack and the gear 1.

[0013] The transmission component includes a second gear that is rotatably connected to the inner wall of the fixed cylinder. The second gear meshes with the first gear. A third gear meshes with the outer side of the second gear. The third gear is rotatably connected to the inner wall of the fixed cylinder and meshes with a rack.

[0014] Among them, gear one has more teeth than gear two, and gear two has more teeth than gear three.

[0015] A temperature sensor is installed between the telescopic column and the geotextile sleeve. A sealing plate is slidably connected to the inner wall of the fixed cylinder, which blocks the flow inner diameter of the fixed cylinder. An electromagnet is fixedly connected to the inner wall of the fixed cylinder and is connected to the temperature sensor. An iron plate is fixedly connected to the end of the sealing plate near the electromagnet. A compression spring is installed between the iron plate and the electromagnet. The inner wall of the fixed cylinder is equipped with a control component that adjusts the attraction force of the electromagnet on the iron plate according to the movement amplitude of the telescopic column.

[0016] The control component includes a sliding rheostat fixedly connected to the inner wall of the fixed cylinder. The sliding rheostat is connected to an electromagnet. A control rod is fixedly connected to one end of the telescopic column near the sliding rheostat. The control rod is connected to the slider of the sliding rheostat. When the telescopic column slides along the inner wall of the fixed cylinder, the resistance of the sliding rheostat decreases.

[0017] The present invention has at least the following beneficial effects: When in use, this application achieves automatic fitting of the surface contour of irregular components through a pre-inspection mechanism, eliminating the need for manual filling of wet geotextile and customized curing equipment for different components, reducing equipment investment costs, adapting to the mass production needs of prefabrication yards, and the geotextile sleeve of the abutment component flexibly fits the component surface. Steam is delivered through both nozzles and geotextile sleeves, combined with adaptive adjustment of angle and flow rate, ensuring that depressions, bulges, bottoms and other parts can obtain uniform temperature and humidity, avoiding direct steam impact on the component surface and water accumulation in depressions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main body of the structural maintenance device of the present invention in the open state; Figure 3 This is a schematic diagram of the internal structure of the placement chamber of the present invention; Figure 4 This is a schematic diagram of the support box structure of the present invention; Figure 5 This is a schematic diagram showing the separation state of the movable plate and the pneumatic telescopic rod of the present invention; Figure 6 This is a schematic diagram showing the connection relationship between the connecting pipe and the fixed cylinder of the present invention; Figure 7 This is a schematic diagram of the maintenance mechanism structure of the present invention; Figure 8 for Figure 7 Enlarged diagram of area A in the middle; Figure 9 This is a schematic diagram of the front sectional view of the geotextile sleeve of the present invention; Figure 10 This is a schematic front sectional view of the fixed cylinder of the present invention.

[0019] In the diagram: 1. Main body of the curing device; 2. Placement chamber; 3. Support box; 4. Protrusion; 5. Geotextile sheet; 6. Pre-inspection mechanism; 60. Top cover plate; 61. Pneumatic telescopic rod one; 62. Moving plate; 63. Pneumatic telescopic rod two; 64. Abutment part; 65. Fixed cylinder; 66. Telescopic column; 67. Return spring; 68. Geotextile sleeve; 7. Curing mechanism; 70. Nozzle; 71. Air supply pipe; 72. Connecting pipe; 73. Air inlet pipe; 74. Adjusting component; 75. Support frame; 76. Rotating shaft; 77. Gear one; 78. Rack; 79. Transmission component; 710. Gear two; 711. Gear three; 712. Temperature sensor; 713. Sealing plate; 714. Electromagnet; 715. Iron sheet; 716. Compression spring; 717. Control component; 718. Sliding rheostat; 719. Control rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 Please see Figures 1 to 10This invention provides a technical solution: a concrete curing device for highway construction, comprising a main body 1; the main body 1 has multiple placement chambers 2 inside, and a support box 3 is fixedly connected to the bottom of each placement chamber 2. The support box 3 has protrusions 4 at both ends, and geotextile sheets 5 are fixedly connected above the protrusions 4. Steam output from the main body 1 can contact the geotextile sheets 5 through the support box 3. The geotextile sheets 5 cover the protrusions 4 of the support box 3 and completely cover the upper surface of the support box 3, forming a flexible support surface at the bottom, thus ensuring the stability of the component placement. It has both moisture absorption and bottom-assisted moisture retention through geotextile; the pre-inspection mechanism 6 is located inside the placement chamber 2. After the concrete component is placed above the support box 3, the pre-inspection mechanism 6 detects the shape of the concrete component and fits it against the surface of the component; the curing mechanism 7 is connected to the support box 3. The main body 1 of the curing device delivers steam to the placement chamber 2 through the curing mechanism 7. When the pre-inspection mechanism 6 fits against the surface of the concrete component, the pre-inspection mechanism 6 adjusts the angle of the steam delivered by the curing mechanism 7 according to the unevenness of the concrete component surface.

[0022] The main body 1 of the curing device has multiple placement chambers 2 inside for placing concrete components used in highway engineering. The size of a single placement chamber 2 can be designed according to the specifications of mainstream concrete components to meet the needs of batch curing. When in use, the main body 1 of the curing device is opened, exposing the placement chambers 2 inside the main body 1, so that the operator can place the concrete components to be cured into the corresponding placement chambers 2 using stacking tools. After the operator places the concrete components to be cured on the support box 3 of the placement chamber 2, the bottom of the component contacts the geotextile sheet 5 on the support box 3. The geotextile sheet 5 initially conforms to the bottom contour of the component through its own elasticity and water absorption, avoiding hard contact between the bottom and the support box 3 to form a curing dead corner. After the concrete component is placed above the support box 3, the pre-inspection mechanism 6 detects the shape of the concrete component and fits it with the surface of the component. This eliminates the need for manual filling of wet geotextile and customized curing equipment for different components, reducing equipment investment costs and adapting to the mass production needs of prefabrication plants. After the pre-inspection mechanism 6 fits the concrete component to be cured, the main body 1 of the curing device delivers steam to the placement chamber 2 through the curing mechanism 7. According to the unevenness of the concrete component surface, the pre-inspection mechanism 6 synchronously adjusts the angle of the steam delivered by the curing mechanism 7. After the curing cycle ends (12-24 hours depending on the strength grade of the component), the main body 1 of the curing device shuts off the steam supply. The second pneumatic telescopic rod 63 retracts first, driving the moving plate 62 away from the component. Then the first pneumatic telescopic rod 61 retracts, driving the upper cover plate 60 to rise, and the operator can then remove the concrete component.

[0023] The pre-inspection mechanism 6 includes an upper cover plate 60. A pneumatic telescopic rod 61 is fixedly connected to the top of the upper cover plate 60. The pneumatic telescopic rod 61 is fixed to the top of the placement chamber 2. The upper cover plate 60 is located above the support box 3. Multiple movable plates 62 are respectively provided on the inner wall of the upper cover plate 60 and the top of the support box 3. The multiple movable plates 62 are distributed around the outer side of the concrete component. A pneumatic telescopic rod 63 is fixedly connected to the outer side of the movable plates 62. The ends of the multiple pneumatic telescopic rods 63 away from the movable plates 62 are respectively fixed to the support box 3 and the inner wall of the upper cover plate 60. Multiple abutting parts 64 are provided on the side of the movable plates 62 away from the pneumatic telescopic rods 63. The multiple abutting parts 64 are arranged in an array on the surface of the movable plates 62.

[0024] When in use, the pneumatic telescopic rod 61 drives the upper cover plate 60 to descend to a preset height, so that the upper cover plate 60, together with the support box 3, wraps the concrete component to be cured. Then, the pneumatic telescopic rod 63 extends synchronously, driving the six moving plates 62 to move a preset distance towards the component, and the abutment 64 contacts the surface of the component, thereby completing the detection of the shape of the concrete component to be tested.

[0025] The abutment member 64 includes a fixed cylinder 65 fixedly connected to the movable plate 62. A telescopic column 66 is slidably and sealingly connected to the inner wall of the fixed cylinder 65. A return spring 67 is fixedly connected to one end of the telescopic column 66 near the fixed cylinder 65. The end of the return spring 67 away from the telescopic column 66 is fixed to the fixed cylinder 65. A geotextile sleeve 68 is fixedly connected to the outer side of the fixed cylinder 65. The center of the geotextile sleeve 68 is fixed to the telescopic column 66. The geotextile sleeve 68 is conical in the initial state and folds and stores when the telescopic column 66 retracts.

[0026] When the pneumatic telescopic rod 63 is deployed, the moving plate 62 drives the fixed cylinder 65 to move, and the fixed cylinder 65 drives the telescopic column 66 to move, so that the geotextile sleeve 68 contacts the surface of the component. As the pneumatic telescopic rod 63 continues to apply pressure, the protrusion 4 on the surface of the component pushes the corresponding telescopic column 66 to retract into the fixed cylinder 65, the return spring 67 is compressed, and the geotextile sleeve 68 deforms with the telescopic column 66, closely fitting the concave and convex contours of the component. The telescopic column 66 in the concave part remains in the extended state under the action of the return spring 67, and the geotextile sleeve 68 contacts the concave surface.

[0027] The maintenance mechanism 7 includes multiple nozzles 70, which are located on the outer side of the end of the fixed cylinder 65. The nozzles 70 are connected to an air supply pipe 71 near the end of the fixed cylinder 65. The air supply pipe 71 is a Y-shaped pipe and is connected to the nozzles 70, the fixed cylinder 65 and the geotextile sleeve 68. The multiple fixed cylinders 65 located in the same movable plate 62 are connected by connecting pipes 72. One of the fixed cylinders 65 is connected to an air inlet pipe 73 on its outer side. The air inlet pipe 73 is connected to the main body 1 of the maintenance device. The outer side of the fixed cylinder 65 is provided with an adjusting component 74 that adjusts the orientation of the nozzles 70 according to the movement range of the telescopic column 66.

[0028] After the pneumatic telescopic rod 63 pushes the moving plate 62 to move a preset distance, the steam generator in the main body 1 of the curing device starts to work. Steam enters each fixed cylinder 65 through the air inlet pipe 73 and the connecting pipe 72, and then is distributed to the nozzle 70 and the inner side of the geotextile sleeve 68 through the Y-shaped air supply pipe 71. In the initial state, the jet direction of the nozzle 70 is obliquely downward, so that when the telescopic column 66 is in the concave part of the concrete component, the steam sprayed by the nozzle 70 will not vertically impact the inner wall of the groove of the concrete component. As the depth of the groove of the concrete component becomes shallower, the jet direction of the nozzle 70 is controlled to rotate upward by the adjusting component 74 to avoid the steam sprayed by the nozzle 70 from not being able to effectively contact the concrete component. This ensures that the cement hydration reaction is sufficient and avoids the steam directly impacting the surface of the component and water accumulation in the concave part, preventing quality hazards such as surface sanding and overheating cracking.

[0029] The adjusting component 74 includes a support frame 75 fixedly connected to the surface of the fixed cylinder 65, and rotating shafts 76 fixedly connected to both sides of the nozzle 70. The rotating shafts 76 are rotatably connected to the inner wall of the support frame 75. One of the rotating shafts 76 is fixedly connected to a gear 77 at the end away from the nozzle 70. A rack 78 is fixedly connected to the outside of the telescopic column 66. A transmission component 79 is provided between the rack 78 and the gear 77.

[0030] As the surface of the concrete component presses against the telescopic column 66, the telescopic column 66 slides along the inner wall of the fixed cylinder 65 and presses against the return spring 67. The telescopic column 66 drives the rack 78 to move, and the rack 78 drives the gear 77 to rotate through the transmission component 79. The gear 77 drives the rotating shaft 76 fixedly connected to it to rotate, and the rotating shaft 76 drives the nozzle 70 to rotate. This allows the orientation of the nozzle 70 to be adjusted synchronously with the unevenness of the concrete component surface. That is, the telescopic column 66 in the concave part extends longer, and the nozzle 70 rotates upward at a smaller angle, avoiding the steam sprayed by the nozzle 70 from vertically impacting the inner wall of the groove of the concrete component; while the telescopic column 66 in the convex part retracts, and the nozzle 70 rotates upward at a larger angle, avoiding the steam sprayed by the nozzle 70 from failing to effectively contact the concrete component.

[0031] The transmission component 79 includes a second gear 710 rotatably connected to the inner wall of the fixed cylinder 65. The second gear 710 meshes with a first gear 77. A third gear 711 meshes with the outer side of the second gear 710. The third gear 711 rotatably connects to the inner wall of the fixed cylinder 65 and meshes with a rack 78. The first gear 77 has more teeth than the second gear 710, and the second gear 710 has more teeth than the third gear 711, thus achieving precise angle adjustment.

[0032] When the telescopic column 66 moves, it drives the rack 78 to move, and the rack 78 drives the gear three 711 to rotate. The gear three 711 is then transmitted to the gear one 77 through the gear two 710, and the gear one 77 drives the rotating shaft 76 of the nozzle 70 to rotate.

[0033] Example 2 In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that a temperature sensor 712 is installed between the telescopic column 66 and the geotextile sleeve 68, a sealing plate 713 is slidably connected to the inner wall of the fixed cylinder 65, the sealing plate 713 blocks the flow inner diameter of the fixed cylinder 65, an electromagnet 714 is fixedly connected to the inner wall of the fixed cylinder 65, the electromagnet 714 is connected to the temperature sensor 712, an iron sheet 715 is fixedly connected to the end of the sealing plate 713 near the electromagnet 714, a compression spring 716 is installed between the iron sheet 715 and the electromagnet 714, and a control component 717 is provided on the inner wall of the fixed cylinder 65 to adjust the attraction force of the electromagnet 714 on the iron sheet 715 according to the movement amplitude of the telescopic column 66.

[0034] Temperature sensor 712 is a PT1000 platinum resistance sensor, installed at the connection between the telescopic column 66 and the geotextile sleeve 68, to monitor the contact temperature between steam and the component in real time. Electromagnet 714, model MFZ1-3.5, power 12V, is welded and fixed to the inner wall of the fixing cylinder 65 at the end away from the telescopic column 66, and is connected to temperature sensor 712 through a wire. It generates suction force after being energized.

[0035] Temperature sensor 712 monitors the contact temperature between steam and the concrete component in real time. When temperature sensor 712 detects that the temperature of the contact area between the geotextile sleeve 68 and the concrete component exceeds a set threshold (e.g., 55℃), temperature sensor 712 sends a signal to de-energize electromagnet 714. Compression spring 716 pushes sealing plate 713 to move, sealing plate 713 closes the inner diameter of fixed cylinder 65, preventing steam from entering the concrete component surface and avoiding local overheating. When the temperature does not exceed the set threshold, temperature sensor 712 controls electromagnet 714 to be energized. The attraction force generated by electromagnet 714 pulls iron plate 715, and iron plate 715 drives sealing plate 713 to slide along the inner wall of fixed cylinder 65, making... Steam enters the nozzle 70 through the fixed cylinder 65. As the telescopic column 66 slides further into the inner wall of the fixed cylinder 65, the current intensity of the circuit controlling the electromagnet 714 by the control component 717 increases, thus increasing the attraction of the electromagnet 714 to the iron plate 715. The iron plate 715 pulls the sealing plate 713 to move, increasing the flow area inside the fixed cylinder 65 and ensuring that steam penetrates to the surface of the concrete component. As the telescopic column 66 slides further into the inner wall of the fixed cylinder 65, the steam flow rate from the nozzle 70 gradually increases. This prevents water accumulation in the groove of the concrete component due to a large steam flow rate when the nozzle 70 is located in a deep-hole groove on the surface of the concrete component.

[0036] The control component 717 includes a sliding rheostat 718 fixedly connected to the inner wall of the fixed cylinder 65. The sliding rheostat 718 is connected to an electromagnet 714. A control rod 719 is fixedly connected to one end of the telescopic column 66 near the sliding rheostat 718. The control rod 719 is connected to the slider of the sliding rheostat 718. When the telescopic column 66 slides along the inner wall of the fixed cylinder 65, the resistance of the sliding rheostat 718 decreases. The sliding rheostat 718, the temperature sensor 712, and the electromagnet 714 are connected in series in the circuit.

[0037] The sliding rheostat 718 adjusts its resistance according to the movement of the telescopic column 66 within the fixed cylinder 65, thereby controlling the attraction of the electromagnet 714: that is, the greater the movement of the telescopic column 66 within the fixed cylinder 65, the greater the distance the slider of the sliding rheostat 718 moves driven by the control rod 719. At this time, the resistance of the sliding rheostat 718 gradually decreases, the current intensity in the circuit where the electromagnet 714 is located increases, the attraction of the electromagnet 714 to the iron plate 715 increases, the movement of the iron plate 715 is greater, and the iron plate 715 drives the sealing plate 713 to move, so that the flow inner diameter of the inner wall of the fixed cylinder 65 gradually increases.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Concrete curing equipment for highway construction, including: Main body of the maintenance device; The feature is that: the main body of the maintenance device has multiple placement chambers inside, a support box is fixedly connected to the bottom of the placement chamber, the support box has protrusions at both ends, a geotextile sheet is fixedly connected above the protrusions, and the geotextile sheet covers the protrusions of the support box; A pre-inspection mechanism is located inside the placement chamber. The pre-inspection mechanism detects the shape of the concrete component after it is placed above the support box. The curing mechanism is connected to the support box. The main body of the curing device supplies steam to the placement chamber through the curing mechanism. When the pre-inspection mechanism is attached to the surface of the concrete component, the pre-inspection mechanism adjusts the angle of the steam supplied by the curing mechanism according to the unevenness of the concrete component surface.

2. The concrete curing device for highway construction according to claim 1, characterized in that: The pre-inspection mechanism includes an upper cover plate, on the top of which a pneumatic telescopic rod is fixedly connected. The pneumatic telescopic rod is fixed to the top of the placement chamber. The upper cover plate is located above the support box. Multiple movable plates are respectively provided on the inner wall of the upper cover plate and the top of the support box. The multiple movable plates are distributed around the outer side of the concrete component. A second pneumatic telescopic rod is fixedly connected to the outer side of the movable plate. The ends of the multiple second pneumatic telescopic rods away from the movable plates are respectively fixed to the support box and the inner wall of the upper cover plate. Multiple abutting members are provided on the side of the movable plate away from the second pneumatic telescopic rod. The multiple abutting members are arranged in an array on the surface of the movable plate.

3. The concrete curing device for highway construction according to claim 2, characterized in that: The abutment includes a fixed cylinder fixedly connected to the movable plate, a telescopic column slidably and sealingly connected to the inner wall of the fixed cylinder, a return spring fixedly connected to one end of the telescopic column near the fixed cylinder, the end of the return spring away from the telescopic column being fixed to the fixed cylinder, and a geotextile sleeve fixedly connected to the outer side of the fixed cylinder, the center of the geotextile sleeve being fixed to the telescopic column.

4. The concrete curing device for highway construction according to claim 3, characterized in that: The geotextile sleeve is initially conical in shape.

5. The concrete curing device for highway construction according to claim 3, characterized in that: The maintenance mechanism includes multiple nozzles, which are located on the outer side of the end of the fixed cylinder. Each nozzle is connected to an air supply pipe near the end of the fixed cylinder. The air supply pipe is Y-shaped and is connected to the nozzle, the fixed cylinder, and the geotextile sleeve. Multiple fixed cylinders located in the same movable plate are connected by connecting pipes. One of the fixed cylinders is connected to an air inlet pipe on its outer side. The air inlet pipe is connected to the main body of the maintenance device. An adjustment component is provided on the outer side of the fixed cylinder to adjust the direction of the nozzle according to the movement range of the telescopic column.

6. The concrete curing device for highway construction according to claim 5, characterized in that: The adjusting component includes a support frame fixedly connected to the surface of the fixed cylinder, and rotating shafts fixedly connected to both sides of the nozzle. The rotating shafts are rotatably connected to the inner wall of the support frame. One of the rotating shafts is fixedly connected to a gear at the end away from the nozzle. A rack is fixedly connected to the outside of the telescopic column. A transmission component is provided between the rack and the gear.

7. The concrete curing device for highway construction according to claim 6, characterized in that: The transmission component includes a second gear that is rotatably connected to the inner wall of the fixed cylinder. The second gear meshes with a first gear. A third gear meshes with the outer side of the second gear. The third gear is rotatably connected to the inner wall of the fixed cylinder and meshes with a rack.

8. The concrete curing device for highway construction according to claim 7, characterized in that: The number of teeth of gear one is greater than the number of teeth of gear two, and the number of teeth of gear two is greater than the number of teeth of gear three.

9. The concrete curing device for highway construction according to claim 3, characterized in that: A temperature sensor is installed between the telescopic column and the geotextile sleeve. A sealing plate is slidably connected to the inner wall of the fixed cylinder, and the sealing plate blocks the flow inner diameter of the fixed cylinder. An electromagnet is fixedly connected to the inner wall of the fixed cylinder, and the electromagnet is connected to the temperature sensor. An iron plate is fixedly connected to the end of the sealing plate near the electromagnet. A compression spring is installed between the iron plate and the electromagnet. The inner wall of the fixed cylinder is provided with a control component to adjust the attraction force of the electromagnet on the iron plate according to the movement amplitude of the telescopic column.

10. The concrete curing device for highway construction according to claim 9, characterized in that: The control component includes a sliding rheostat fixedly connected to the inner wall of the fixed cylinder. The sliding rheostat is connected to an electromagnet. A control rod is fixedly connected to one end of the telescopic column near the sliding rheostat. The control rod is connected to the slider of the sliding rheostat. When the telescopic column slides along the inner wall of the fixed cylinder, the resistance of the sliding rheostat decreases.

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