A precast bridge maintenance system with waste heat recovery capability

Abstract

This utility model discloses a precast bridge maintenance system with waste heat recovery, comprising: a hot water circulation pipeline: flowing sequentially through a water tank, a water supply pump, a steam curing mechanism, and a collection pool; a hot water waste heat circuit: circulating sequentially through the collection pool, a return pump, and the water tank; the water tank is equipped with a heat exchanger immersed in the water, and the two connecting ends of the heat exchanger extend outside the water tank to connect to an external heating device; the water in the water tank is transported to the steam curing mechanism by the water supply pump and escapes in the form of tiny water molecule clusters and diffuses into the surrounding air to maintain the bridge, while the water that has not been converted flows into the collection pool and then flows back to the water tank by the return pump; since the water returning to the water tank has not completely lost heat and still retains significant waste heat, this part of the waste heat can directly participate in the secondary heating of the water in the water tank, without the need for additional energy consumption to raise the initial water temperature, greatly reducing the energy load of reheating the water tank, thereby reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of precast bridge maintenance equipment, and in particular to a precast bridge maintenance system that can recover and utilize waste heat. Background Technology

[0002] As an important transportation infrastructure, bridges are mainly composed of superstructure, substructure, supports, and ancillary structures. With the increasing demands for efficiency, quality, and environmental protection in modern engineering construction, prefabricated bridge construction technology has become the mainstream development direction in the industry. Compared with the traditional on-site formwork and pouring construction mode, this technology completes the segmented prefabrication of bridge components in a standardized production workshop in a prefabrication plant. After passing inspection, the components are transported to the construction site for precise assembly. This not only effectively avoids the disadvantages of on-site pouring, which is greatly affected by environmental climate and has a long construction cycle, but also achieves significant advantages in quality control and efficiency improvement through factory production, greatly shortening the overall construction cycle. Each prefabricated bridge segment must undergo strict curing procedures before leaving the factory for transport and on-site assembly.

[0003] In existing technologies, steam is directly used to maintain bridge components. During maintenance, the water in the water tank needs to be continuously heated to boiling to generate steam through a boiler. After the steam is transported to the maintenance area through pipelines, only 30%-40% of it can fully contact the surface of the bridge components and transfer heat. The remaining steam will diffuse into the surrounding environment with the air, and the condensate formed during the diffusion process carries a large amount of residual heat and is directly lost. Not only can it not be recovered for secondary heating of the water, but it also cannot help regulate the temperature of the maintenance environment. As a result, the heating system needs to operate at a high load continuously to replenish the steam, resulting in high overall energy consumption and a corresponding increase in maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a precast bridge maintenance system that can recover waste heat, thereby reducing the energy load of reheating the water tank and thus reducing energy consumption.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A precast bridge maintenance system with waste heat recovery capability includes:

[0007] Hot water circulation pipeline: flows sequentially through water tank, water supply pump, steam curing mechanism, and water collection pool;

[0008] Hot water waste heat circuit: The water flows sequentially through the collection tank, return pump, and water tank;

[0009] The water tank is equipped with a heat exchanger that is submerged in water, and the two connecting ends of the heat exchanger extend out of the water tank to connect to an external heating device.

[0010] Based on the above technical solution, the present invention can be improved as follows:

[0011] Furthermore, the water tank has a water storage chamber inside, and the heat exchanger is housed in the water storage chamber. The two connecting ends of the heat exchanger extend out of the water tank to connect to an external heating device. The water tank has clearance holes on its wall for the two connecting ends of the heat exchanger to extend out of the water tank. A sleeve is welded at the clearance hole, a sealing ring is installed inside the sleeve, and a clamp is fitted on the outside of the sleeve.

[0012] Furthermore, the water tank has a first liquid inlet and a second liquid inlet on its wall that connect to the water storage chamber; the first liquid inlet is near the bottom of the water tank and is used to connect to the hot water circulation pipe; the second liquid inlet is near the top of the water tank and is used to connect to the hot water waste heat circuit; so that the water flowing back from the second liquid inlet can flow from top to bottom in the water storage chamber, be heated by the heat exchanger, and then enter the hot water circulation pipe from the first liquid inlet.

[0013] Furthermore, the heat exchanger is a heat exchange tube spirally wound from top to bottom, with two connecting ends of the heat exchange tube extending outside the water tank to connect to an external heating device.

[0014] Furthermore, the heating device includes a solar collector and an air source heater. Accordingly, there are two heat exchange tubes, which are intertwined and coiled together. The two ends of one heat exchange tube are connected to the solar collector, and the two ends of the other heat exchange tube are connected to the air source heater.

[0015] Furthermore, the hot water circulation pipeline is equipped with a shut-off valve between the first liquid inlet of the water tank and the water supply pump, and a check valve is installed between the water supply pump and the steam curing mechanism.

[0016] Furthermore, the steam curing mechanism is provided in at least two parts. Correspondingly, the output end of the water supply pump is connected to at least two water supply branch pipes, and the water supply branch pipes are connected to the water inlet of the steam curing mechanism one by one. Each water supply branch pipe is equipped with a heating solenoid valve. The input end of the water collection tank is connected to at least two return water branch pipes, and the return water branch pipes are connected to the drainage outlet of the steam curing mechanism one by one.

[0017] Furthermore, the steam curing mechanism includes a support frame, a disturbance member inclinedly supported on the support side of the support frame, a spray pipe located at the top of the disturbance member, and a liquid collection tank located at the bottom of the disturbance member; the disturbance member has multiple continuously undulating disturbance structures; the spray pipe is equipped with a nozzle; the spray pipe is connected to the water supply branch pipe, and the liquid collection tank is connected to the return water branch pipe; when the nozzle sprays, the water flows through the disturbance structure, is dispersed and disturbed, and is converted into a gaseous state before being diffused into the air in the curing operation area, and some of the water that has not been converted is collected through the liquid collection tank.

[0018] Furthermore, the disturbance component is a wave plate, the surface of which forms a continuous undulating wave surface, which is the disturbance structure, and the wave surface is alternately distributed along the height direction of the wave plate to form multiple wave peaks and troughs.

[0019] Furthermore, a water-blocking cover is provided at the top of the bracket, and a cover opening is formed at the bottom of the water-blocking cover, with the spray pipe covered in the cover cavity inside the water-blocking cover.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention, through the setting of a hot water circulation pipeline and a hot water waste heat circuit, allows water in the tank to be pumped to the steam curing mechanism and released into the surrounding air in the form of tiny water molecule clusters to maintain the bridge. Water that has not been completely converted flows into a collection tank and is then returned to the tank by a return pump. Since the water returning to the tank has not completely lost heat and still retains significant waste heat, this waste heat can directly participate in the secondary heating of the water in the tank without the need for additional energy to raise the initial water temperature, thus greatly reducing the energy load of reheating the tank and reducing energy consumption. Attached Figure Description

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the prefabricated bridge maintenance system with waste heat recovery capability in Example 1;

[0024] Figure 2 This is a schematic diagram of the steam curing mechanism in Example 1;

[0025] Figure 3 This is a schematic diagram of the prefabricated bridge maintenance system with waste heat recovery capability in Example 2.

[0026] The markings on the attached diagram are: 1. Water tank; 2. Water supply pump; 3. Water collection tank; 4. Return water pump; 5. Water inlet; 6. First heat exchange tube; 7. Second heat exchange tube; 8. Solar collector; 9. Air source heater; 10. Shut-off valve; 11. Check valve; 12. Temperature sensor; 13. Water supply branch pipe; 14. Heating solenoid valve; 15. Return water branch pipe; 16. Support; 17. Spray pipe; 18. Liquid collection tank; 19. Corrugated plate; 20. Spray head; 21. Water baffle; 22. Filter; 23. Shelf; 24. Auxiliary spray pipe. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1

[0029] See Figure 1 and Figure 2 This embodiment relates to a precast bridge maintenance system with waste heat recovery capability, comprising:

[0030] Hot water circulation pipeline: flows sequentially through water tank 1, water supply pump 2, steam curing mechanism, and water collection pool 3;

[0031] Hot water waste heat circuit: The water flows sequentially through water collection tank 3, return water pump 4, and water tank 1.

[0032] The water tank 1 is equipped with a heat exchanger that is submerged in water. The heat exchanger has two connecting ends through which the heat exchange medium can flow. The two connecting ends of the heat exchanger extend out of the water tank 1 to connect to an external heating device. When the heating device is started, the heat exchange medium is heated and conveyed to the heat exchanger. After flowing through the heat exchanger and completing the heat exchange with the water, it flows back into the heating device for reheating to circulate and heat the water in the water tank 1.

[0033] Water tank 1 has two liquid inlets, one of which is connected to the hot water circulation pipe and the other is connected to the hot water waste heat circuit. The water in water tank 1 is transported to the steam curing mechanism by the water supply pump 2 and escapes in the form of tiny water molecule clusters and diffuses into the surrounding air to maintain the bridge. The water that has not been completely converted flows into the collection pool 3 and then flows back to water tank 1 by the return water pump 4. Since the water flowing back to water tank 1 has not completely lost heat and still has significant residual heat, this residual heat can be directly used to reheat the water in water tank 1 without additional energy consumption to raise the initial water temperature, which greatly reduces the energy load of reheating water tank 1 and thus reduces energy consumption.

[0034] Specifically, the water tank 1 is a hollow cylindrical box with an outer box and an inner box. The space between the outer box and the inner box is filled with thermal insulation foam material of the prior art to improve the thermal insulation effect of the water tank 1. An internal water storage chamber is formed, in which the heat exchanger is housed. The two connecting ends of the heat exchanger extend out of the water tank 1 to connect to an external heating device. The water tank 1 has clearance holes on its wall for the two connecting ends of the heat exchanger to extend out of the water tank 1. A sleeve is welded at the clearance hole, and a sealing ring is installed inside the sleeve. A clamp is fitted on the outside of the sleeve. By tightening the clamp, the sleeve contracts inward, sealing the gap between the connecting ends of the heat exchanger and the clearance holes on the water tank 1 to prevent water leakage.

[0035] Water tank 1 has a water inlet 5 at the top that connects to the water storage chamber, so as to add water into water tank 1; water tank 1 has a first liquid inlet and a second liquid inlet on the tank wall that connect to the water storage chamber; the first liquid inlet is near the bottom of water tank 1 and is used to connect to the hot water circulation pipe; the second liquid inlet is near the top of water tank 1 and is used to connect to the hot water waste heat circuit; newly added water and return water flow from top to bottom in the water storage chamber, are heated by the heat exchanger, and are then input into the hot water circulation pipe from the first liquid inlet.

[0036] The heat exchanger is a heat exchange tube spirally wound from top to bottom. The top end of the heat exchange tube is the first connection end, which is used to input the heat exchange medium, and the bottom end of the heat exchange tube is the second connection end, which is used to output the heat exchange medium. The first and second connection ends of the heat exchange tube extend out of the water tank 1 and are connected to an external heating device.

[0037] In this embodiment, the heating device includes a solar collector 8 and an air source heater 9. Accordingly, two heat exchange tubes are provided: a first heat exchange tube 6 and a second heat exchange tube 7, which are intertwined. The first heat exchange tube 6 is connected to the output end of the solar collector 8, and the second heat exchange tube 6 is connected to the return end of the solar collector 8. The first heat exchange tube 7 is connected to the output end of the air source heater 9, and the second heat exchange tube 7 is connected to the return end of the air source heater 9. In actual operation… The solar collector 8 is used first to meet the heating needs, maximizing the use of natural energy and reducing energy consumption. When encountering cloudy days, nighttime or other scenarios with insufficient sunlight, and the solar heating capacity weakens, the air source heater 9 can be activated immediately to supplement the heat, continuously providing stable heat to the heat exchange medium, effectively avoiding the intermittent shortcomings of a single solar heat source. This dual heat source complementary mode not only fully utilizes the energy-saving advantages of solar energy, but also ensures that the temperature of the heat exchange medium always meets the bridge maintenance requirements with the assistance of air source, ensuring continuous and stable progress of maintenance work and avoiding the impact of heat source interruption on maintenance quality.

[0038] A shut-off valve 10 is installed between the first liquid inlet of the water tank 1 and the water supply pump 2 in the hot water circulation pipeline, and a check valve 11 is installed between the water supply pump 2 and the steam curing mechanism. The shut-off valve 10 is used to control the hot water flow or the flow rate, and the check valve 11 is used to prevent the hot water from flowing back. A temperature sensor 12 is installed at the output end of the water supply pump 2 to monitor the temperature of the hot water being delivered.

[0039] In this embodiment, at least two steam curing mechanisms are provided, each corresponding to the curing of a precast bridge; correspondingly, the output end of the water supply pump 2 is connected to at least two water supply branch pipes 13, and the water supply branch pipes 13 are connected to the water inlet of the steam curing mechanism one by one. Each water supply branch pipe 13 is equipped with a heating solenoid valve 14 to control the hot water on / off or flow rate of each steam curing mechanism; the input end of the water collection tank 3 is connected to at least two return water branch pipes 15, and the return water branch pipes 15 are connected to the drainage outlet of the steam curing mechanism one by one, so as to collect the water that has not been converted by each steam curing mechanism into the water collection tank 3.

[0040] The steam curing mechanism includes a support frame 16, a disturbance member mounted on the support frame 16, a spray pipe 17 mounted on the top of the disturbance member for spraying liquid, and a collection tank 18 mounted on the bottom of the disturbance member for collecting liquid. The disturbance member has multiple continuously undulating disturbance structures. The spray pipe 17 has a liquid inlet and a nozzle 20, and the liquid inlet of the spray pipe 17 is connected to a water supply branch pipe 13. The collection tank 18 has a drain outlet, and the drain outlet of the collection tank 18 is connected to a return water branch pipe 15.

[0041] The support side of bracket 16 facing the precast bridge is designated as the support side, which is used to tilt and fix the disturbance component. Hot water is delivered to the inside of spray pipe 17 and sprayed onto the disturbance component through nozzle 20 on spray pipe 17. Under its own gravity, it flows from top to bottom along the disturbance component. When it passes through the disturbance structure on the disturbance component, it is dispersed and disturbed, and escapes in the form of tiny water molecule clusters and diffuses into the surrounding air, thereby increasing the ambient temperature and relative humidity of the maintenance work area. Some of the water that has not been converted flows to the bottom of the disturbance component, is collected through collection tank 18, and is then discharged into water collection pool 3 from the drain outlet of collection tank 18.

[0042] The support 16 is a frame structure with a right-angled triangular cross section, which is made of multiple support rods welded together. The support rods are rectangular steel. When the support 16 is installed in the maintenance work area, the inclined side of the support 16 is the support side and is opposite to the precast bridge. The disturbance component is fixedly installed on the support side of the support 16 by bolts.

[0043] The disturbance component is a wave plate 19, the surface of which forms a continuous undulating wave surface. This wave surface is a disturbance structure, and multiple wave crests and troughs are alternately distributed along the height direction of the wave plate 19. The water sprayed through the spray pipe 17 can flow from top to bottom along the wave surface of the wave plate 19. When the water flows over the wave crest, it is blocked by the wave crest and the water flow is evenly spread into a thin liquid film, which not only increases the contact area between the water and the air, but also effectively slows down the downward speed of the water flow. When the water flows into the trough of the wave surface, a buffer zone can be formed briefly at the trough. This buffer zone can buffer part of the water and prevent the water from sliding down quickly.

[0044] Through the synergistic effect of the wave crests and troughs of the wave plate 19, the overall residence time of water on the surface of the wave plate 19 is significantly extended, providing sufficient time for water molecules to escape from the liquid surface. This promotes more water molecules to overcome surface tension, transform from liquid to gas, and diffuse into the surrounding air. At the same time, when the air in the maintenance work area flows through the wave plate 19, the airflow is lifted upward at the crests of the wave surface and forms tiny eddies at the troughs of the wave surface to disturb the air. This air disturbance can quickly remove the high-humidity boundary layer from the water surface, allowing fresh, low-humidity air to continuously contact the water surface. This not only ensures that the escaping water molecules can quickly diffuse into the air, but also effectively avoids stagnation due to diffusion obstruction, ultimately ensuring a stable increase in temperature and humidity in the maintenance area.

[0045] It should be noted that, depending on actual needs, a suitable wave plate 19 for converting water into a gaseous state and diffusing it into the air can be selected, such as an arc wave plate 19 or a triangular wave plate 19; preferably, in this embodiment, the wave plate 19 is an arc wave plate 19. Compared with the triangular wave plate 19, the smooth curved surface of the arc wave plate 19 can promote the water to slide down the curve naturally, and the water flow is continuous. The smooth curved surface of the arc wave plate 19 guides the air to flow along a smooth path, and the air disturbance is gentle, avoiding excessive splashing of water.

[0046] The spray pipe 17 is a long cylindrical pipe, fixed to the top of the bracket 16 and opposite to the top of the corrugated plate 19. The spray pipe 17 is parallel to the length direction of the corrugated plate 19. One axial end of the spray pipe 17 is closed, and the other axial end of the spray pipe 17 forms a liquid inlet to facilitate connection to the water supply branch pipe 13. Multiple nozzles 20 are provided on the spray pipe 17. The nozzles 20 are arranged at equal intervals along the axial direction of the spray pipe 17 and face the corrugated plate 19 to spray water onto the corrugated surface from the top of the corrugated plate 19. In this embodiment, the temperature of the water entering the spray pipe 17 is 60°C to 80°C.

[0047] A water baffle 21 is provided at the top of the support 16. A cavity is formed inside the water baffle 21, and an opening is formed at the bottom of the water baffle 21 that communicates with the cavity. The spray pipe 17 is covered in the cavity inside the water baffle 21 to block the water splashed up when the nozzle 20 sprays the wave plate 19.

[0048] The liquid collection tank 18 is an elongated tank. The liquid collection tank 18 is fixed to the bottom end of the support 16 and is opposite to the bottom of the corrugated plate 19. The liquid collection tank 18 is parallel to the length direction of the corrugated plate 19. The liquid collection tank 18 has a slot at the top and a drain outlet on the bottom wall of the tank to facilitate connection to the return water branch pipe 15. Some of the water that has not been converted flows to the bottom of the turbulence member, enters the liquid collection tank 18 through the slot at the top of the liquid collection tank 18 to be collected, and is discharged into the water collection pool 3 at the drain outlet of the liquid collection tank 18.

[0049] The bottom wall of the collection tank 18 slopes downward from one end to the other along its length, and the drain outlet is located at the lowest point of the bottom wall of the collection tank 18 so that the water in the collection tank 18 can flow along the bottom wall of the collection tank 18 to the drain outlet.

[0050] In this embodiment, temperature and humidity are controlled by spraying water onto the disturbance component. As the water flows along the disturbance component, it is guided and blocked by multiple continuous undulating disturbance structures on the disturbance component, and is fully dispersed and disturbed. Finally, it escapes in the form of tiny water molecule clusters and diffuses evenly into the air in the maintenance work area, thereby achieving a uniform increase in ambient temperature and relative humidity.

[0051] Unlike the traditional method of directly using high-temperature steam for heating and humidification in existing technologies, this embodiment does not require heating the water to the boiling point (it only needs to maintain a suitable temperature of 60℃~80℃ to promote evaporation), which can significantly reduce energy consumption. In addition, by increasing the contact area between the water and air and slowing down the water flow rate, the curing mechanism in this embodiment not only meets the need for slow heating to prevent cracking in the curing of precast bridges, but also effectively avoids the temperature gradient stress on the surface and inside of the components caused by a sudden temperature rise, preventing cracking of thin-walled and irregularly shaped components. Moreover, it can provide sufficient moisture for the hardening of the concrete of the precast bridge through stable and continuous humidification, ensuring the strength of the precast bridge and ultimately improving the overall curing quality.

[0052] A shed 23 is set up around the steam curing facility, forming a relatively independent space to facilitate the maintenance of the bridge.

[0053] The return water pump 4 is equipped with a filter 22 at the inlet end. The filter 22 is used to filter the water drawn from the water collection tank 3 to prevent impurities in the water from entering the return water pump 4 and causing blockage. The filter 22 is a Y-type filter in the prior art.

[0054] Example 2

[0055] See Figure 3The difference between this second embodiment and the first embodiment lies in that an auxiliary nozzle 24 and multiple temperature and humidity sensors are installed inside the frame 23. The auxiliary nozzle 24 is an elongated cylindrical tube, fixed in the middle of the top wall inside the frame 23, and parallel to the length of the frame 23. One axial end of the auxiliary nozzle 24 is closed, and the other axial end forms a liquid inlet. A thermostatic valve (not shown in the figure) is installed at the liquid inlet, and the input end of the thermostatic valve is connected to the water supply branch pipe 13. Multiple sensors are installed on the auxiliary nozzle 24. Atomizing nozzles are arranged at equal intervals along the axial direction of the auxiliary spray pipe 24, with the nozzles facing vertically downwards. Temperature and humidity sensors are used to monitor the temperature and humidity inside the canopy 23 in real time and transmit the obtained temperature and humidity values ​​to an external control device via wired or wireless means. When the monitored temperature and humidity reach a preset threshold, the thermostatic valve is controlled to allow hot water to enter the auxiliary spray pipe 24, which is then atomized by the atomizing nozzles and sprayed around. This helps the steam curing mechanism to quickly increase the temperature and humidity inside the canopy 23, thereby adapting to the curing needs of precast bridges in a dry environment.

[0056] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A precast bridge maintenance system with waste heat recovery capability, characterized in that, include: Hot water circulation pipeline: flows sequentially through water tank, water supply pump, steam curing mechanism, and water collection pool; Hot water waste heat circuit: The water flows sequentially through the collection tank, return pump, and water tank; The water tank is equipped with a heat exchanger that is submerged in water, and the two connecting ends of the heat exchanger extend out of the water tank to connect to an external heating device.

2. The precast bridge maintenance system with waste heat recovery capability according to claim 1, characterized in that, The water tank has a water storage chamber inside, and the heat exchanger is housed in the water storage chamber. The two connecting ends of the heat exchanger extend out of the water tank to connect to an external heating device. The water tank has clearance holes on the tank wall for the two connecting ends of the heat exchanger to extend out of the water tank. A sleeve is welded at the clearance hole, a sealing ring is installed inside the sleeve, and a clamp is fitted on the outside of the sleeve.

3. The precast bridge maintenance system with waste heat recovery capability according to claim 2, characterized in that, The water tank has a first liquid inlet and a second liquid inlet on its wall that connect to the water storage chamber. The first liquid inlet is located near the bottom of the water tank and is used to connect to the hot water circulation pipe. The second liquid inlet is located near the top of the water tank and is used to connect to the hot water waste heat circuit. This allows the water flowing back from the second liquid inlet to flow from top to bottom in the water storage chamber, be heated by the heat exchanger, and then enter the hot water circulation pipe from the first liquid inlet.

4. The precast bridge maintenance system with waste heat recovery capability according to claim 3, characterized in that, The heat exchanger is a heat exchange tube spirally wound from top to bottom, with two connecting ends of the heat exchange tube extending outside the water tank to connect to an external heating device.

5. The precast bridge maintenance system with waste heat recovery capability according to claim 4, characterized in that, The heating device includes a solar collector and an air source heater. Accordingly, there are two heat exchange tubes, which are intertwined and coiled together. The two ends of one heat exchange tube are connected to the solar collector, and the two ends of the other heat exchange tube are connected to the air source heater.

6. The precast bridge maintenance system with waste heat recovery capability according to claim 5, characterized in that, The hot water circulation pipeline is equipped with a shut-off valve between the first liquid inlet of the water tank and the water supply pump, and a check valve between the water supply pump and the steam curing mechanism.

7. The precast bridge maintenance system with waste heat recovery capability according to claim 6, characterized in that, The steam curing mechanism is provided in at least two parts. Correspondingly, the output end of the water supply pump is connected to at least two water supply branch pipes, and the water supply branch pipes are connected to the water inlet of the steam curing mechanism one by one. Each water supply branch pipe is equipped with a heating solenoid valve. The input end of the water collection tank is connected to at least two return water branch pipes, and the return water branch pipes are connected to the drainage outlet of the steam curing mechanism one by one.

8. The precast bridge maintenance system with waste heat recovery capability according to claim 7, characterized in that, The steam curing mechanism includes a support frame, a disturbance component tilted and supported on the support side of the support frame, a spray pipe located at the top of the disturbance component, and a collection tank located at the bottom of the disturbance component; the disturbance component has multiple continuously undulating disturbance structures; the spray pipe is equipped with a nozzle; the spray pipe is connected to the water supply branch pipe, and the collection tank is connected to the return water branch pipe; when the nozzle sprays, the water flows through the disturbance structure, is dispersed and disturbed, and is converted into a gaseous state before being diffused into the air in the curing operation area, and some of the water that has not been converted is collected through the collection tank.

9. The precast bridge maintenance system with waste heat recovery capability according to claim 8, characterized in that, The disturbance component is a wave plate, and the surface of the wave plate forms a continuous undulating wave surface. The wave surface is the disturbance structure, and the wave surface is alternately distributed along the height direction of the wave plate to form multiple wave peaks and troughs.

10. The precast bridge maintenance system with waste heat recovery capability according to claim 9, characterized in that, The top of the support is provided with a water-blocking cover, and the bottom of the water-blocking cover forms a cover opening, with the spray pipe covered in the cover cavity inside the water-blocking cover.

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