Maintenance device for road and bridge concrete prefabricated part

Abstract

The invention relates to a road bridge concrete prefabricated part curing device, and belongs to the field of concrete curing devices.The road bridge concrete prefabricated part curing device comprises a steam generating unit, a top cover and a steam curing cover; the steam curing cover comprises a plurality of splicing frame bodies which are sequentially connected in the vertical direction. The splicing frame body comprises a plurality of splicing modules which are evenly distributed in the circumferential direction of the column body and connected in sequence. A steam gap is formed between the inner walls of the adjacent splicing modules; sealing grooves are formed in the two sides of each splicing module in the vertical direction; after two adjacent splicing modules are connected, the two corresponding sealing grooves form a sealed space; air supply hoses are respectively arranged in the plurality of sealed spaces; the steam generation unit is connected with a plurality of air supply hoses; a plurality of air outlet holes communicated with the steam gap are formed in the air supply hose in the length direction of the air supply hose; the top cover is connected with the top wall of the steam curing cover; the device has the technical effects of being simple in structure and improving the steam utilization rate.

Description

Technical Field

[0001] This application relates to the technical field of concrete curing devices, and in particular to a curing device for precast concrete components of roads and bridges. Background Technology

[0002] The quality of steam curing for precast concrete components used in road and bridge construction directly determines their structural strength, durability, and service life, making it a core aspect of precast component production and construction. Currently, the industry widely adopts steam curing to accelerate the hydration reaction of concrete and ensure the quality of precast component molding.

[0003] Existing steam curing hoods are mostly integral structures with extremely poor adaptability. They cannot be flexibly adjusted according to prefabricated column components of different heights and circumferential dimensions in road and bridge projects, resulting in insufficient versatility and increased construction costs. Some spliced ​​steam curing hoods have weak sealing performance between splicing modules, making it easy for steam to leak from the splicing gaps, which reduces steam utilization and leads to uneven temperature and humidity distribution inside the steam curing hood.

[0004] Meanwhile, the existing equipment has independent gas supply and sealing structures, which are complex and cumbersome to disassemble and assemble, making it difficult to adapt to the needs of construction sites with changing work surfaces and frequent disassembly and assembly; the steam distribution is unreasonable, which cannot achieve uniform steam supply to the precast components in the vertical and circumferential directions, and is prone to problems such as cracking of concrete surface and uneven strength development.

[0005] Chinese patent application No. 202411535911.4 discloses a prefabricated column-mounted preheating hood, including a prefabricated preheating hood and an intelligent temperature control system base. The intelligent temperature control system base is installed on a prefabricated column base. The prefabricated preheating hood adopts an assemblable design, where multiple prefabricated preheating hoods are sequentially spliced ​​according to the column length and installed on the intelligent temperature control system base to form a sealed column kiln body. Steam pipes and water spray pipes are installed on the intelligent temperature control system base. Water pipes corresponding to the steam pipes and water spray pipes are installed inside the prefabricated preheating hood, and the water pipes are connected to nozzles. Temperature and humidity probes are also installed inside the prefabricated preheating hood. The temperature and humidity probes feed back the kiln signals to the curing system host via data cables. The curing system host sends control signals to the intelligent temperature control system base to control the opening / closing of solenoid valves in the steam pipes and water spray pipes. The preheating hood in the above patent has a risk of air leakage at the connection points, which leads to increased steam consumption and wasted energy.

[0006] Regarding the aforementioned technologies, the inventors believe that the spliced ​​steam curing hoods suffer from defects such as weak sealing performance between spliced ​​modules and low steam utilization rate. Summary of the Invention

[0007] To address the aforementioned technical problems, this application provides a curing device for precast concrete components of roads and bridges.

[0008] This application provides a curing device for precast concrete components of roads and bridges, which adopts the following technical solution: A curing device for precast concrete components of roads and bridges includes a steam generating unit, a top cover, and a curing hood. The curing hood includes multiple splicing frames connected vertically in sequence. Each splicing frame includes multiple splicing modules evenly distributed and connected sequentially along the circumference of the column. A steam gap exists between the inner walls of adjacent splicing modules. Sealing grooves are vertically formed on both sides of each splicing module. When two adjacent splicing modules are connected, their corresponding two sealing grooves form a sealed space. Air supply hoses are respectively installed in the multiple sealed spaces. The steam generating unit is connected to the multiple air supply hoses. Multiple air outlets communicating with the steam gaps are formed along the length of each air supply hose. The top cover is connected to the top wall of the curing hood.

[0009] By adopting the above technical solution, the sealing groove of the splicing module forms a sealed space and has a built-in air supply hose. The air supply hose has multiple air outlets along its length that communicate with the steam gap. After the steam enters the steam gap through the air outlets, it enters the steam curing hood and acts on the side wall of the column precast component. This allows the steam to be evenly sprayed vertically along the column precast component, avoiding the problem of uneven vertical steam distribution in traditional steam curing. After the steam is introduced into the air supply hose, it expands and tightly squeezes the wall of the sealing groove. Without the need for additional sealing strips, sealing rings, or other special sealing components, it can effectively seal the connection between adjacent splicing modules, preventing steam leakage from the splicing gap from the source. At the same time, the air supply hose has the dual functions of steam delivery and splicing sealing, which greatly simplifies the overall structure of the device, reduces the types and number of parts, and lowers the manufacturing cost and on-site maintenance difficulty of the device.

[0010] Preferably, the steam generating unit includes a steam boiler, an annular connecting pipe, and steam pipes; the annular connecting pipe is connected to the steam outlet of the steam boiler; the tops of the plurality of steam supply hoses are coaxially connected to Venturi tubes; one end of the plurality of steam pipes is connected to the annular connecting pipe, and the other end extends into the plurality of Venturi tubes.

[0011] By adopting the above technical solution, the annular connecting pipe is connected to the steam outlet of the steam boiler. The annular structure is compatible with the splicing modules and gas supply hoses distributed along the circumference of the column. After the steam is output from the steam boiler, it can be evenly distributed to all the steam pipes in the circumference through the annular connecting pipe to achieve equal pressure and equal quantity, avoiding the problem of uneven steam input and input pressure in the circumferential gas supply hoses caused by traditional branch pipe distribution. The tops of multiple gas supply hoses are coaxially connected to the Venturi tubes, and the ends of the steam pipes extend into the corresponding Venturi tubes. This coaxial structure allows the steam to flow smoothly into the gas supply hoses along the axis of the Venturi tubes after flowing out of the steam pipes at high speed, greatly reducing the resistance and pressure loss in the steam flow process.

[0012] Preferably, the top cover has multiple exhaust ports; each of the multiple exhaust ports is connected to an exhaust pipe between itself and a plurality of venturi tubes.

[0013] By adopting the above technical solution, the exhaust port on the top cover is precisely aligned with the steam accumulation area at the top of the steam curing hood. The exhaust pipe directly connects the exhaust port to the Venturi tube, allowing the negative pressure generated by the Venturi tube to form a directional suction path. This directly and efficiently extracts the high-temperature steam accumulated at the top of the steam curing hood. After connecting with the air supply hose, a fully closed-loop steam circulation circuit is formed, avoiding the temperature and humidity difference between the top, middle, and bottom of the precast column. This achieves a dynamic balance of temperature and humidity throughout the vertical area of ​​the column, significantly improving the uniformity of vertical steam curing and effectively preventing defects such as cracking and uneven strength development in concrete caused by excessive vertical temperature and humidity gradients.

[0014] Preferably, multiple wedges are evenly arranged vertically on both sides of the splicing module; a compression sleeve is slidably arranged at the air outlet; the compression sleeve is sleeved on the outer periphery of the two wedges corresponding to it.

[0015] By adopting the above technical solution, the wedges on both sides of the splicing module are adapted to the extrusion sleeves at the air outlets. The pressure generated after steam is introduced into the air supply hose will push the extrusion sleeves towards the wedges. The extrusion sleeves fit over and squeeze the corresponding wedges of adjacent splicing modules. Through the force transmission of the wedges, the two splicing modules are pulled closer to each other, further compacting the splicing gaps. When the steam pressure in the air supply hose reaches a preset value and pushes the extrusion sleeves to the designated position, the air outlets will be fully opened, and steam can be injected into the steam gaps. This achieves steam pressure contact... The controlled steam discharge prevents impurities and concrete debris from entering the vents and causing blockages under no-pressure / low-pressure conditions, ensuring long-term unobstructed airflow. On the other hand, after steam is ejected from the vents, it is blocked by the circumferential sidewall of the extrusion sleeve, preventing unidirectional direct injection. Instead, it diffuses evenly around the circumference of the extrusion sleeve before entering the steam gap. This prevents steam from blowing directly onto the concrete column surface from the open vents, thus preventing defects such as cracking and sanding caused by rapid local evaporation of moisture and sudden changes in temperature and humidity during the initial setting stage of concrete. This provides effective protection for the precast concrete structure.

[0016] Preferably, after adjacent splicing modules are connected, multiple wedges are located within the steam gap; each of the multiple wedges corresponds one-to-one with a multiple air outlet.

[0017] By adopting the above technical solution, a curing device for precast concrete components of roads and bridges is developed.

[0018] Preferably, the bottom of the steam curing hood is provided with an annular water storage tank; the outer side of the annular water storage tank is connected to the steam curing hood, and the inner side is fitted onto the bottom of the column.

[0019] By adopting the above technical solution, the outer side of the annular water storage tank is connected to the steam curing hood, and the inner side is fitted onto the bottom of the column, forming a closed condensate collection space around the bottom of the column, which can collect the condensate flowing vertically on the inner wall of the steam curing hood.

[0020] Preferably, the bottom wall of the annular water storage tank has multiple drain outlets; each of the multiple drain outlets is connected to a U-shaped connecting pipe.

[0021] By adopting the above technical solution, multiple drain outlets are evenly arranged around the bottom wall of the annular water storage tank. When the water level in the annular water storage tank is too high, it is discharged from the U-shaped connecting pipe. The pipe structure of the U-shaped connecting pipe allows a certain height of condensate to be naturally retained inside, forming a gravity water seal structure. This avoids the problem of insufficient steam curing at the bottom of the column due to steam loss at the bottom, while improving steam utilization and reducing energy consumption.

[0022] Preferably, the end of the U-shaped connecting pipe away from the drain outlet is connected to the annular connecting pipe; an overflow outlet is provided at the end of the U-shaped connecting pipe away from the drain outlet; a float is slidably disposed vertically inside the U-shaped connecting pipe; the tops of the multiple floats extend upward into the connection points between the multiple air supply hoses and the annular connecting pipe.

[0023] By adopting the above technical solution, the top of the float in the U-shaped connecting pipe extends into the connection between the air supply hose and the annular connecting pipe. When the water level in the annular water tank rises, the float slides vertically upwards synchronously with the condensate, directly reducing the flow space at the steam delivery connection point and precisely reducing the amount of steam input from the source of steam delivery. As the amount of steam decreases, the amount of steam condensation in the steam curing hood decreases synchronously, thereby inhibiting the water level in the water tank from continuing to rise. This achieves fully automatic adaptive adjustment of steam flow, eliminating the need for real-time manual monitoring and operation, significantly reducing the manual intensity of on-site maintenance, and improving the level of automation.

[0024] Preferably, the outer wall of the annular water storage tank is an arc-shaped wall; multiple sealing plates are slidably arranged inside the annular water storage tank; one end of the sealing plate abuts against the arc-shaped wall, and the other end is rotatably connected to the inner wall of the annular water storage tank; a water inlet is provided on the sealing plate; and a float is movably connected below the water inlet.

[0025] By adopting the above technical solution, a float ball is movably connected below the inlet of the floating sealing plate. When the steam in the steam curing hood increases suddenly, causing condensate to be generated rapidly and the water level in the storage tank to rise sharply, the float ball rises synchronously with the water level and blocks the inlet, temporarily cutting off the condensate inflow channel and relieving the drainage pressure of the storage tank from the water source. One end of the floating sealing plate abuts against the arc-shaped wall, and the other end is rotatably connected to the inner wall of the storage tank. When the water level in the storage tank rises and pushes the floating sealing plate to rotate, the end that abuts against the arc-shaped wall slides down along the arc surface and forms a uniform squeezing force on the condensate in the tank, quickly pressing the condensate in the storage tank into the drain outlet and U-shaped connecting pipe, which greatly improves the drainage efficiency, can quickly reduce the water level in the storage tank, and realize active emergency control of the water level.

[0026] Preferably, the float component includes a floating ball, a sliding rod, and an adjusting ball; the end of the U-shaped connecting pipe away from the annular water storage tank has a connecting groove; the adjusting ball is located at the connection between the air supply hose and the annular connecting pipe, and is used to block the connecting groove; the floating ball is located inside the U-shaped connecting pipe; one end of the sliding rod is connected to the floating ball, and the other end is connected to the adjusting ball; multiple thrust pipes are provided on the steam curing hood; one end of each of the multiple thrust pipes is vertically slidably provided with a driving piston; the multiple driving pistons abut against the top wall of the end of each of the multiple sealing plates away from the column; the other end of the thrust pipe is connected to the connecting groove.

[0027] By adopting the above technical solution, the floating ball moves upward with the rise of the water level, which reduces the space at the connection between the steam supply hose and the ring connecting pipe, and at the same time opens the connecting groove of the U-shaped connecting pipe. Steam enters the thrust pipe through the connecting groove, which pushes the drive piston downward to press against the floating water sealing plate, providing steam pressure power for the squeezing and drainage of the floating water sealing plate, and improving the adjustment speed of the amount of steam in the steam curing hood.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing groove of the splicing module forms a sealed space and has a built-in air supply hose. The air supply hose has multiple vent holes along its length that communicate with the steam gap. After the steam enters the steam gap through the vent holes, it enters the steam curing hood and acts on the side wall of the column precast component. This ensures that the steam is evenly sprayed along the vertical direction of the column precast component, avoiding the problem of uneven vertical steam distribution in traditional steam curing. After the steam is introduced into the air supply hose, it expands and tightly squeezes the wall of the sealing groove. There is no need to set up additional sealing strips, sealing rings or other special sealing components to achieve effective sealing at the connection between adjacent splicing modules, preventing steam leakage from the splicing gap from the source. At the same time, the air supply hose has the dual functions of steam delivery and splicing sealing, which greatly simplifies the overall structure of the device, reduces the types and number of parts, and reduces the manufacturing cost and on-site maintenance difficulty of the device.

[0029] 2. The wedges on both sides of the splicing module are adapted to the extrusion sleeves at the vent. The pressure generated after steam is introduced into the air supply hose will push the extrusion sleeves towards the wedges. The extrusion sleeves fit over and press against the corresponding wedges of adjacent splicing modules. Through the force transmission of the wedges, the two splicing modules are pulled closer to each other, further compacting the splicing gap. When the steam pressure in the air supply hose reaches the preset value and pushes the extrusion sleeves to the designated position, the vent will be fully opened, and steam can be injected into the steam gap. This achieves steam pressure-triggered release control. This design prevents impurities and concrete debris from entering the vent and causing blockages under no-pressure / low-pressure conditions, ensuring the vent remains unobstructed for extended periods. Furthermore, the steam ejected from the vent is blocked by the circumferential sidewalls of the extrusion sleeve, preventing unidirectional direct injection. Instead, it diffuses evenly around the extrusion sleeve before entering the steam gap, preventing steam from directly blowing onto the concrete column surface from the open vent. This prevents defects such as cracking and sanding caused by rapid localized evaporation of moisture and sudden temperature and humidity changes during the initial setting stage of concrete, thus providing effective protection for the precast concrete structure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a curing device for precast concrete components of roads and bridges.

[0031] Figure 2 This is a schematic diagram of the internal structure of the curing cover in the embodiment.

[0032] Figure 3 yes Figure 2 A magnified view of part A in the image.

[0033] Figure 4 This is a schematic diagram of the wedge block in the embodiment.

[0034] Figure 5 yes Figure 2 Enlarged view of the structure of B in the middle.

[0035] Figure 6 yes Figure 2 A magnified view of part C.

[0036] Figure 7 This is a schematic diagram of the sealing plate in the embodiment.

[0037] Figure 8 This is a schematic diagram of the structure of the float component in the embodiment.

[0038] Explanation of reference numerals in the attached figures: 1. Steam generating unit; 11. Steam boiler; 12. Annular connecting pipe; 13. Steam pipe; 2. Steam curing hood; 21. Splicing frame; 211. Splicing module; 22. Steam gap; 23. Wedge block; 24. Extrusion sleeve; 3. Top cover; 31. Exhaust pipe; 4. Gas supply hose; 41. Air outlet; 5. Venturi tube; 6. Annular water storage tank; 61. U-shaped connecting pipe; 611. Connecting groove; 612. Overflow port; 62. Float component; 621. Floating ball; 622. Sliding rod; 623. Adjusting ball; 63. Sealing plate; 631. Water inlet; 632. Float; 633. Torsion spring; 64. Arc-shaped wall; 7. Thrust tube; 71. Drive piston; 8. Column. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0040] This application discloses a curing device for precast concrete components of roads and bridges. (Refer to...) Figure 1-3 The steam generator unit includes a steam generating unit 1, a top cover 3, and a steam curing hood 2. The top cover 3 is connected to the top wall of the steam curing hood 2. The steam curing hood 2 includes multiple splicing frame bodies 21 connected vertically in sequence. Each splicing frame body 21 includes multiple splicing modules 211 evenly distributed and connected in sequence along the circumference of the column 8. Adjacent splicing modules 211 are fixedly connected by bolts and nuts. There is a steam gap 22 between the inner walls of adjacent splicing modules 211. Sealing grooves are respectively opened vertically on both sides of the splicing module 211. After two adjacent splicing modules 211 are connected, their corresponding two sealing grooves form a sealed space. Gas supply hoses 4 are respectively installed in the multiple sealed spaces. The steam generating unit 1 is connected to the multiple gas supply hoses 4. Specifically, the steam generating unit 1 includes a steam boiler 11, an annular connecting pipe 12, and a steam pipe 13. The annular connecting pipe 12 is connected to the steam outlet of the steam boiler 11. The multiple gas supply hoses 4. Venturi tubes 5 are coaxially connected to the top of each of the columns 8. One end of each of the multiple steam pipes 13 is connected to the annular connecting pipe 12, and the other end of each of the multiple steam pipes 13 extends into the multiple Venturi tubes 5, with the ports located below the multiple Venturi tubes 5. The steam boiler 11 can transmit steam to the multiple steam pipes 13 through the annular connecting pipe 12. The steam in the steam pipes 13 flows downward into the gas supply hose 4. The gas supply hose 4 has multiple air outlets 41 connected to the steam gap 22 along its length. The steam finally enters the steam curing hood 2 through the multiple air outlets 41 and the steam gap 22. The multiple vertically arranged air outlets 41 can evenly deliver the steam to the side wall of the column 8, ensuring that the column 8 is evenly steamed. The gas supply hose 4 filled with steam will expand and press against the wall of the sealing groove to prevent steam from leaking out from the connection gap of the splicing module 211.

[0041] As the amount of steam introduced into the steam curing hood 2 increases, a large amount of steam will accumulate at the top of the steam curing hood 2. The temperature and humidity at the top of the column 8 are relatively higher than those at the bottom of the middle part. Therefore, multiple exhaust ports are provided on the top cover 3. Each of the multiple exhaust ports is connected to a venturi tube 5 with an exhaust pipe 31. One end of the exhaust pipe 31 extends from the top of the venturi tube 5. The steam flowing out from the steam pipe 13 can drive the airflow in the venturi tube 5, creating a negative pressure in the venturi tube 5. This draws the large amount of high-temperature steam accumulated at the top of the steam curing hood 2 into the venturi tube 5 and into the air supply hose 4. This creates a vertically flowing steam flow in the steam curing hood 2, allowing the column 8 to be steamed evenly along all parts of the vertical direction, thus improving the steam curing efficiency of the column 8.

[0042] Reference Figure 4 and Figure 5 Multiple wedges 23 are evenly arranged vertically on both sides of the splicing module 211. After two adjacent splicing modules 211 are connected to each other, the multiple wedges 23 on the two splicing modules 211 correspond to each other in pairs, and the multiple wedges 23 are located in the steam gap 22. The multiple vertically arranged wedges 23 correspond one-to-one with multiple air outlets 41. A compression sleeve 24 is slidably arranged at the air outlet 41. The compression sleeve 24 is sleeved on the outer periphery of the two wedges 23 corresponding to it. After steam is introduced into the air supply hose 4, the generated air pressure first compresses the wedges 23. The sleeve 24 is pushed toward the wedge 23; at this time, the extrusion sleeve 24 extrudes the two wedges 23 inward, thereby pulling the two splicing modules 211 closer to each other; further improving the sealing effect at the connection of the splicing modules 211; after the steam pushes the extrusion sleeve 24 to move, the extrusion sleeve 24 opens the air outlet 41, thereby allowing the steam to enter the steam curing gap, and finally enter the steam curing hood 2. Under the obstruction of the sleeve, the steam flows to the circumference of the extrusion sleeve 24, which facilitates the even distribution of steam in the steam curing gap, so that the steam enters the steam curing hood 2 evenly.

[0043] Reference Figure 2 and Figure 6 The bottom of the steam curing hood 2 is provided with an annular water storage tank 6; the outer side of the annular water storage tank 6 is connected to the steam curing hood 2, and the inner side is fitted onto the bottom of the column 8; after the steam inside the steam curing hood 2 liquefies, it flows from the inner wall of the steam curing hood 2 into the annular water storage tank 6 below; the bottom wall of the annular water storage tank 6 has multiple drain outlets; each of the multiple drain outlets is connected to a U-shaped connecting pipe 61; specifically, one end of each of the multiple U-shaped connecting pipes 61 is connected to the multiple drain outlets, and the other end extends upward through the steam curing hood 2. Reference Figure 6 and Figure 7The end of the U-shaped connecting pipe 61 furthest from the drain outlet is connected to the annular connecting pipe 12; an overflow port 612 is provided at the end of the U-shaped connecting pipe 61 furthest from the drain outlet; the overflow port 612 is opened at the maximum height of the water level in the annular water storage tank 6; a float 62 is vertically slidably installed inside the U-shaped connecting pipe 61; the tops of multiple floats 62 extend upward into the connection points of multiple air supply hoses 4 and multiple annular connecting pipes 12 respectively; when the water level in the annular water storage tank 6 is too high, it is discharged from the overflow port 612 of multiple U-shaped connecting pipes 61, and at the same time, the water pushes the floats 62 upward, thereby reducing the space at the connection points of the air supply hoses 4 and the annular connecting pipe 12, thereby reducing the amount of steam introduced.

[0044] The outer wall of the annular water storage tank 6 is an arc-shaped wall 64; multiple sealing plates 63 are slidably arranged inside the annular water storage tank 6; one end of the sealing plate 63 abuts against the arc-shaped wall 64, and the other end is rotatably connected to the inner wall of the annular water storage tank 6; an inlet 631 is provided on the sealing plate 63; a float 632 is movably connected below the inlet 631; the float 632 can float on the water surface; a connecting rope is connected between the float 632 and the sealing plate 63; condensate enters the annular water storage tank 6 from the inlet 631; the horizontal height of the overflow port 612 is lower than that of the sealing plate 63. When there is too much steam in the steam curing hood 2, the condensation efficiency of the water in the steam curing hood 2 increases, and the water level in the annular water storage tank 6 rises too quickly. The drainage speed of the overflow port 612 is lower than the condensation efficiency of the condensate, which pushes the float 632 upward to the sealing plate 63, ultimately blocking the inlet 631. By rotating the sealing plate 63 downward at one end of the arc-shaped wall 64, the water in the annular water storage tank 6 is squeezed downward, improving the water discharge efficiency. This causes the float 62 to move upward more quickly, improving the rapid adjustment effect of the steam flow. The sealing plate 63 is rotatably mounted on the annular water storage tank 6 via a rotating shaft. A torsion spring 633 is sleeved on the rotating shaft, with both ends of the torsion spring 633 abutting against the sealing plate 63 and the annular water storage tank 6, respectively. When the water in the annular water storage tank 6 is discharged more quickly, the torsion spring 633 can pull the float seal to reset.

[0045] Reference Figure 6 and Figure 8The float component 62 includes a floating ball 621, a sliding rod 622, and an adjusting ball 623; the end of the U-shaped connecting pipe 61 away from the annular water storage tank 6 has a connecting groove 611; the adjusting ball 623 is located at the connection between the air supply hose 4 and the annular connecting pipe 12, and is used to block the connecting groove 611; the floating ball 621 is located inside the U-shaped connecting pipe 61; one end of the sliding rod 622 is connected to the floating ball 621, and the other end is connected to the adjusting ball 623; multiple [unclear] are provided on the steam curing hood 2. Thrust tube 7; one end of each of the multiple thrust tubes 7 is vertically slidably equipped with a drive piston 71; the multiple drive pistons 71 respectively abut against the top wall of the end of the multiple sealing plates 63 away from the column 8; the other end of the thrust tube 7 is connected to the connecting groove 611; when the floating ball 621 moves upward, it connects the connecting groove 611 to the annular connecting pipe 12, and some steam enters the thrust tube 7 from the connecting groove 611. The steam pressure pushes the drive piston 71 to move downward, thereby pushing the sealing plate 63 to rotate.

[0046] The working principle of the curing device for precast concrete components of roads and bridges in this application is as follows: After the steam boiler 11 is started, the steam is distributed to each steam pipe 13 through the annular connecting pipe 12. The steam pipe 13 delivers the steam to the bottom of the venturi tube 5 and flows down at high speed into the gas supply hose 4. After the steam is introduced into the gas supply hose 4, it expands and deforms, and is tightly squeezed on the groove wall of the sealing groove of the splicing module 211, realizing the primary seal at the connection of adjacent splicing modules 211, and preventing steam from being lost from the splicing gap from the source.

[0047] During the secondary sealing and uniform steam release stage at the splice joint, the steam pressure in the gas supply hose 4 synchronously pushes the extrusion sleeve 24 at the vent 41 towards the wedge 23 in the steam gap 22. The extrusion sleeve 24 fits onto and extrudes the corresponding wedge 23 of the adjacent splice module 211. Through the force transmission of the wedge 23, the two splice modules 211 are pulled closer to each other, further compacting the splice gap, completing the secondary sealing at the connection, and improving the overall sealing effect. After the extrusion sleeve 24 moves into place, it fully opens the vent 41. Steam enters the steam gap 22 from the vertically evenly distributed vent 41 on the gas supply hose 4 and is uniformly released vertically throughout the entire area along the side wall of the column 8, achieving uniformity of the steam curing of the column 8 foundation.

[0048] As the steam input in the steam curing hood 2 increases, the high-temperature steam naturally accumulates at the top of the steam curing hood 2, causing uneven temperature and humidity in the vertical column 8. At this time, the high-speed steam flowing in the steam pipe 13 creates a negative pressure environment in the venturi tube 5. This negative pressure draws the high-temperature steam accumulated at the top of the steam curing hood 2 into the venturi tube 5 through the exhaust pipe 31. After merging with the fresh steam delivered by the steam pipe 13, the steam enters the air supply hose 4 again and is sprayed back into the steam gap 22 from the air outlet 41, forming a vertical steam circulation loop in the steam curing hood 2. This breaks the state of steam accumulation at the top, ensuring that the temperature and humidity at the top, middle, and bottom of the column 8 remain consistent, greatly improving the uniformity and efficiency of steam curing.

[0049] During the steam curing process, the steam inside the steam curing hood 2 condenses upon cooling and flows naturally downwards along the inner wall of the steam curing hood 2, eventually flowing into the annular water storage tank 6 at the bottom of the steam curing hood 2. Under normal operating conditions, the condensate enters the U-shaped connecting pipe 61 through the drain port on the bottom wall of the annular water storage tank 6, and is then discharged from the overflow port 612 of the U-shaped connecting pipe 61. The overflow port 612 is connected to the annular connecting pipe 12, realizing the recycling and reuse of condensate and reducing the waste of water resources and heat energy.

[0050] When the amount of steam in the steam curing hood 2 is too large, the steam condensation efficiency increases, and the water level in the annular water storage tank 6 rises rapidly and exceeds the normal height. The rising water level pushes the float 632 at the inlet 631 of the sealing plate 63 upward. The float 632 blocks the inlet 631, temporarily preventing condensate from continuing to flow into the annular water storage tank 6. The high water level in the annular water storage tank 6 simultaneously pushes the float 62 in the U-shaped connecting pipe 61 to move vertically upward. The adjusting ball 623 of the float 62 reduces the communication space between the air supply hose 4 and the annular connecting pipe 12, directly reducing the amount of steam input, reducing the amount of steam condensation from the source, and relieving water level pressure.

[0051] After the float 62 moves upward, the connecting groove 611 of the U-shaped connecting pipe 61 connects with the annular connecting pipe 12, and some steam enters the thrust pipe 7 on the steam curing hood 2 from the connecting groove 611; the steam pressure pushes the drive piston 71 in the thrust pipe 7 to move vertically downward, and the drive piston 71 presses against the end of the sealing plate 63 away from the column 8, assisting the sealing plate 63 to rotate and strengthening its squeezing effect on the condensate, further accelerating the condensate drainage efficiency, and pushing the float 62 to continue to move upward, so as to achieve rapid and deep adjustment of the steam flow.

[0052] As the water level drops, the float 62 moves vertically downwards, and the adjusting ball 623 restores the connection between the air supply hose 4 and the annular connecting pipe 12, allowing the steam input to return to normal steam curing requirements. The torsion spring 633 on the rotating shaft drives the sealing plate 63 to rotate in the opposite direction around the shaft, returning to its initial position. The float 632 falls due to gravity as the water level drops, reopening the inlet 631, allowing condensate to flow normally into the annular water storage tank 6. The connection between the connecting groove 611 and the annular connecting pipe 12 is released, and the steam pressure in the thrust pipe 7 disappears. A spring is installed between the drive piston 71 and the thrust pipe 7, which can push the drive piston 71 upwards to reset, stopping the pressure on the sealing plate 63. The entire device returns to normal steam curing operation, continuously achieving uniform steam curing of the column 8.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roadway bridge concrete precast unit curing apparatus, characterized by: The steam generator includes a steam generating unit (1), a top cover (3), and a steam curing hood (2). The steam curing hood (2) includes multiple splicing frames (21) connected vertically in sequence. Each splicing frame (21) includes multiple splicing modules (211) evenly distributed and connected in sequence along the circumference of a column (8). There is a steam gap (22) between the inner walls of adjacent splicing modules (211). Sealing grooves are provided vertically on both sides of each splicing module (211). After two adjacent splicing modules (211) are connected, their corresponding two sealing grooves form a sealed space. Each of the multiple sealed spaces is provided with a gas supply hose (4). The steam generating unit (1) is connected to the multiple gas supply hoses (4). Multiple air outlets (41) communicating with the steam gaps (22) are provided on the gas supply hoses (4) along their length. The top cover (3) is connected to the top wall of the steam curing hood (2).

2. The curing device for precast concrete components of roads and bridges according to claim 1, characterized in that: The steam generating unit (1) includes a steam boiler (11), an annular connecting pipe (12), and steam pipes (13); the annular connecting pipe (12) is connected to the steam outlet of the steam boiler (11); the tops of the plurality of gas supply hoses (4) are coaxially connected to Venturi tubes (5); one end of the plurality of steam pipes (13) is connected to the annular connecting pipe (12), and the other end extends into the plurality of Venturi tubes (5).

3. The curing device for precast concrete components of roads and bridges according to claim 2, characterized in that: The top cover (3) has multiple exhaust ports; the multiple exhaust ports are connected to the multiple venturi tubes (5) by exhaust pipes (31).

4. The curing device for precast concrete components of roads and bridges according to claim 1, characterized in that: Multiple wedges (23) are evenly arranged vertically on both sides of the splicing module (211); a compression sleeve (24) is slidably arranged at the air outlet (41); the compression sleeve (24) is sleeved on the outer periphery of the two wedges (23) corresponding to it.

5. A curing device for precast concrete components of roads and bridges according to claim 4, characterized in that: After the adjacent splicing modules (211) are connected, the multiple wedges (23) are located in the steam gap (22); the multiple wedges (23) correspond one-to-one with the multiple air outlets (41).

6. A curing device for precast concrete components of roads and bridges according to claim 2, characterized in that: The bottom of the steam curing hood (2) is provided with an annular water storage tank (6); the outer side of the annular water storage tank (6) is connected to the steam curing hood (2), and the inner side is fitted onto the bottom of the column (8).

7. A curing device for precast concrete components of roads and bridges according to claim 6, characterized in that: The bottom wall of the annular water storage tank (6) has multiple drain outlets; each of the multiple drain outlets is connected to a U-shaped connecting pipe (61).

8. A curing device for precast concrete components of roads and bridges according to claim 7, characterized in that: The end of the U-shaped connecting pipe (61) away from the drain outlet is connected to the annular connecting pipe (12); an overflow port (612) is provided at the end of the U-shaped connecting pipe (61) away from the drain outlet; a float (62) is slidably arranged vertically inside the U-shaped connecting pipe (61); the tops of the multiple floats (62) extend upward into the connection points of the multiple air supply hoses (4) and the multiple annular connecting pipes (12).

9. A curing device for precast concrete components of roads and bridges according to claim 8, characterized in that: The outer wall of the annular water storage tank (6) is an arc-shaped wall (64); a plurality of sealing plates (63) are slidably arranged inside the annular water storage tank (6); one end of the sealing plate (63) abuts against the arc-shaped wall (64), and the other end is rotatably connected to the inner wall of the annular water storage tank (6); an inlet (631) is provided on the sealing plate (63); a float (632) is movably connected below the inlet (631).

10. A curing device for precast concrete components of roads and bridges according to claim 9, characterized in that: The float component (62) includes a floating ball (621), a sliding rod (622), and an adjusting ball (623); the end of the U-shaped connecting pipe (61) away from the annular water storage tank (6) has a connecting groove (611); the adjusting ball (623) is located at the connection between the air supply hose (4) and the annular connecting pipe (12), and is used to block the connecting groove (611); the floating ball (621) is located inside the U-shaped connecting pipe (61); the sliding rod (622) is a sliding ball (623). One end of the rod (622) is connected to the floating sphere (621), and the other end is connected to the adjusting sphere (623); a plurality of thrust tubes (7) are provided on the steam curing hood (2); a driving piston (71) is slidably provided at one end of each of the plurality of thrust tubes (7) in the vertical direction; the plurality of driving pistons (71) abut against the top wall of the end of each of the plurality of sealing plates (63) away from the column (8); the other end of the thrust tube (7) is connected to the communicating groove (611).

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