Concrete prefabricated part curing kiln

Abstract

The invention discloses a precast concrete component curing kiln, and belongs to the technical field of precast concrete component production, the precast concrete component curing kiln comprises a curing kiln body, the curing kiln body is internally provided with a plurality of curing box single bodies arranged at equal intervals, and each curing box single body is internally provided with an evaporation curing assembly, a component mold trolley, a mold locking assembly and a steam film removing assembly; a sealable hinged kiln door is arranged on the curing box single body, two symmetrically-arranged rails are arranged in the curing box single body, the evaporation curing assembly is arranged in the curing box single body and used for curing a concrete prefabricated component, and the component mold trolley slides in the two rails. The mold locking assemblies are arranged at the inner bottoms of the curing box single bodies and can lock component mold trolleys on the two rails. A steam film on a component is removed, efficient heat transfer can be quickly recovered, and temperature stress cracking is avoided; the component moisture content is balanced, local quality defects are overcome, maintenance uniformity is guaranteed, and the overall performance of the component is improved.

Description

Technical Field

[0001] This invention belongs to the field of precast concrete component production technology, and particularly relates to a curing kiln for precast concrete components. Background Technology

[0002] Precast concrete components are construction materials used in building engineering. Common examples include precast concrete floor slabs, concrete box girders for bridges, precast concrete roof trusses for industrial plants, culvert frames, and precast concrete piles for foundation treatment. These components are typically prefabricated in factories using formwork and then cured before use. Steam curing is frequently used in the curing process of these precast concrete components. Steam curing effectively shortens the curing time, accelerates construction progress, avoids the impact of low temperatures on precast concrete components, and reduces the difficulty of curing precast concrete components in low-temperature regions. Therefore, the frequency of steam curing in the curing process of precast concrete components is constantly increasing.

[0003] When steam heating is used for curing precast concrete components in the curing kiln, steam film is a common phenomenon. Its formation is directly related to the curing environment: when the high-temperature steam in the kiln comes into contact with the surface of the component with a lower initial temperature, the steam will condense on the surface of the component to form a water layer. If the humidity in the kiln is saturated (usually ≥95%RH) and there is no effective airflow disturbance, this water layer will continue to be heated and locally vaporized, forming a stable "gas-liquid mixed steam film" that adheres tightly to the surface of the component.

[0004] The presence of a vapor film on precast concrete components can hinder the transfer of curing heat, disrupt curing uniformity, and lead to component quality defects: areas with thicker film layers absorb less heat and have lower temperatures, while areas with thinner film layers have higher temperatures. The temperature difference between the inside and outside, and between the top and bottom of the component, may exceed 5°C, causing temperature stress and increasing the risk of surface cracking and internal micro-cracks. Moisture in the film-covered areas cannot evaporate or penetrate normally, resulting in excessively high local moisture content (prone to sanding and peeling), while uncovered areas lose moisture quickly (prone to drying and developing shrinkage cracks), seriously affecting the appearance and structural integrity of the component.

[0005] Therefore, there is a need to provide a curing kiln for precast concrete components that can remove the steam film during use. Summary of the Invention

[0006] This invention provides a curing kiln for precast concrete components to solve the problems in the prior art.

[0007] The present invention adopts the following technical solution: a curing kiln for precast concrete components, comprising a curing kiln body, wherein a plurality of curing chambers are arranged at equal intervals within the curing kiln body, and each curing chamber contains an evaporation curing component, a component mold trolley, a mold locking component, and a vapor film removal component. Each curing chamber has a closable hinged kiln door, and two symmetrically arranged tracks are provided within each curing chamber. The evaporation curing component is disposed within the curing chamber to cure the precast concrete components. The component mold trolley slides within the two tracks. The mold locking component is disposed at the inner bottom of the curing chamber to lock the component mold trolley onto the two tracks. A water collection trough is provided on one side of the interior of each curing chamber, and a drainage pipe is provided on the water collection trough.

[0008] Furthermore, the evaporation curing assembly includes two gas supply pipes and two evaporation pipe arrays. The curing kiln body includes a steam generator. The two evaporation pipe arrays are symmetrically and vertically fixed on both sides inside the curing box unit. The two gas supply pipes are respectively connected between the steam generator and the evaporation pipe arrays.

[0009] Furthermore, the mold locking assembly includes a drive shaft, a front mounting base, a rear mounting base, and two locking components. The drive shaft is horizontally rotatably connected to the bottom of the component mold trolley. The front and rear mounting bases are vertically arranged inside the curing box unit and located below the component mold trolley. The two locking components are respectively connected to the bottom of the component mold trolley. When the rotating threaded rod of the locking component is inserted into the rotating hole of the front or rear mounting base, locking is achieved. When it is necessary to lift the trolley, the connection point can serve as a hinge point to allow the trolley to rotate around it. The rear mounting base is divided into an upper seat and a lower seat, with the upper seat slidingly connected to the lower seat.

[0010] Furthermore, each of the locking components includes a mounting frame, a front bevel gear, two side bevel gears, and two rotating threaded rods. The mounting frame is located at the bottom of the component mold trolley. The front bevel gear is connected to the drive shaft. The two side bevel gears are symmetrically rotatably connected to both sides of the mounting frame. The two rotating threaded rods are coaxial with and threadedly connected to the two side bevel gears respectively. The front bevel gear and the two side bevel gears mesh and drive each other. The rotating threaded rods are provided with a threaded section and a smooth section. The smooth section slides against the mounting frame. The front mounting seat and the rear mounting seat are provided with placement slots for placing the mounting frame. The sides of the placement slots are provided with rotating holes that slide with the smooth section.

[0011] Furthermore, the vapor film removal assembly includes a bottom lifting removal component, a scraping moving component, a scraping angle adjusting component, and a scraping bonding component. The bottom lifting removal component is mounted on the rear mounting base and is rotatably connected to the curing box unit. The scraping moving component is located at the inner top of the curing box unit and is rotatably connected to the curing box unit. The scraping angle adjusting component is mounted on the scraping moving component. There are two scraping bonding components, each mounted on the scraping angle adjusting component.

[0012] Furthermore, the bottom lifting removal component includes a drive motor, a drive shaft, two upper lifting plates, and two lower lifting plates. The drive motor is located on the outside of the maintenance box unit. The drive shaft is horizontally rotatably connected between the maintenance box unit and the two tracks. The two lower lifting plates are symmetrically arranged on the drive shaft. The tops of the two upper lifting plates are respectively hinged to the upper seat, and the bottoms of the two upper lifting plates are respectively hinged to the two lower lifting plates.

[0013] Furthermore, the scraping moving component includes a moving plate, a moving motor, a chain, two slide rails, and four sprockets. The two slide rails are symmetrically arranged on the inner top of the curing box unit. The moving plate is mounted on the two slide rails and slides between them. The four sprockets are rectangularly rotatably connected to the inner top of the curing box unit, and the moving motor is driven by one of the sprockets. The chain is sleeved on the four sprockets, and one side of the chain is connected to the moving plate.

[0014] Furthermore, the scraping angle adjustment component includes an adjustment motor, a first gear, a second gear, two scraping plates, and two rotating shafts. The adjustment motor is located inside the moving plate. The ends of the two scraping plates are rotatably connected to each other. The two rotating shafts are respectively connected to the two scraping plates. The first gear and the second gear are respectively connected to the two rotating shafts and mesh with each other. The first gear is connected to the main shaft of the adjustment motor. Each scraping plate has a flexible scraper at its bottom, and a water guide groove is provided between the scraping plate and the flexible scraper.

[0015] Furthermore, each of the scraping and bonding components includes a bonding base, a horizontal plate, a pressing plate, a support, a rotating screw, and three sliding rods. The horizontal plate is fixedly connected to the side wall of the scraping plate, and the three sliding rods are slidably connected to the horizontal plate at equal intervals. The pressing plate is horizontally positioned at the top of the three sliding rods, and the bonding base is horizontally positioned at the bottom of the three sliding rods. A spring is provided on the sliding rod between the horizontal plate and the pressing plate. The support is horizontally positioned on the side wall of the scraping plate, and the bottom of the rotating screw is rotatably connected to the horizontal plate, with the rotating screw threadedly connected to the support.

[0016] Furthermore, the flexible scraper is located at the bottom of the scraping plate and extends to fit the bottom of the base. The bottom of the flexible scraper is provided with a drainage groove, and the scraping surface of the flexible scraper is designed as an arc surface.

[0017] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0018] Firstly, in this invention, the drive motor rotates the drive shaft on the curing box unit and two tracks, which in turn rotates the two lower lifting plates. The rotation of the lower lifting plates then moves the upper lifting plate, causing the lower upper seat to move upwards relative to the lower seat. This lifts one end of the component mold trolley upwards, allowing the two smooth rod sections on the mounting frame to rotate through the two rotating holes, thus lifting the component mold trolley. The tilt angle adjustment range is 3°-15°. Utilizing gravity, the residual moisture or flowing vapor film on the component surface after the vapor film is scraped away flows rapidly along the inclined component surface to the water collection tank on one side of the curing box unit, and is discharged through the drainage pipe. Gravity-assisted drainage, compared to traditional natural drainage, can more quickly and thoroughly remove residual moisture from the component surface, effectively preventing secondary condensation of steam on the component surface to form a new vapor film. This reduces problems such as obstructed heat transfer and uneven curing caused by secondary vapor films, improving the overall quality and efficiency of component curing.

[0019] Secondly, when adjusting the scraping angle, the present invention uses a motor to drive the first gear to rotate, which in turn drives the second gear to rotate. The rotation of the first and second gears drives two rotating shafts, thereby adjusting the angle of the two scraping blades. This allows for dynamic adjustment of the scraping blade angle based on the actual condition of the vapor film, ensuring better contact between the flexible scraper blades and the component surface. This achieves efficient scraping of both thin and thick vapor films. Compared to scraping devices with fixed angles, this design significantly improves adaptability to vapor films under different working conditions, avoiding vapor film residue or damage to the component surface due to improper scraping angles, thus enhancing the vapor film removal effect and the quality of component maintenance.

[0020] Thirdly, the present invention rotates the rotating screw. Since the rotating screw is threadedly connected to the support, when the rotating screw rotates, it will move upward or downward along the axis, thereby driving the position of the pressing plate to move downward through the guidance of the three sliding rods, so that the flexible scraper is evenly attached to the surface of the component. The contact distance and pressure between the flexible scraper and the component can be flexibly adjusted according to the thickness of the vapor film and the flatness of the component surface. It ensures effective removal of the vapor film while avoiding damage to the component surface due to excessive pressure or incomplete removal due to insufficient pressure. It prevents the scraper from lifting off in a localized area due to single-point force, ensuring a consistent pressure difference between the scraper and the component surface. Whether on a flat area or a surface with minor irregularities, such as slight pitting in the early stages of curing, the scraper can fully adhere to the surface, thoroughly removing vapor films as thin as 0.1-0.5mm. This avoids the localized vapor film residue caused by uneven pressure in traditional manual pressing. For thin vapor films, simply lower the screw slightly to allow the scraper to lightly touch the surface for removal. For thick vapor films, the downward movement can be increased to allow the scraper to properly embed into the gas-liquid mixture layer, ensuring a clean removal in one go. This avoids "incomplete removal" due to insufficient adhesion or moisture being squeezed into the component gaps due to excessive adhesion. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the curing kiln body in this invention;

[0022] Figure 2 This is a partial three-dimensional structural diagram of the curing box unit in the curing kiln body of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the curing box unit in this invention;

[0024] Figure 4 This is a front view of the single unit of the curing box in this invention;

[0025] Figure 5 This is a three-dimensional structural cross-sectional view of the maintenance box unit of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the component mold trolley and mold locking assembly in this invention;

[0027] Figure 7 This is a three-dimensional structural diagram of the mold locking assembly in this invention;

[0028] Figure 8 This is a three-dimensional structural exploded view of the locking component in this invention;

[0029] Figure 9 This is a three-dimensional structural diagram of the bottom lifting and removal component in this invention;

[0030] Figure 10 This is a three-dimensional structural diagram of the scraping moving part in this invention;

[0031] Figure 11 This is a three-dimensional structural diagram of the scraping angle adjustment component in this invention;

[0032] Figure 12 for Figure 11 Enlarged view of point A in the middle;

[0033] Figure 13 This is a three-dimensional structural diagram of the scraping plate in this invention;

[0034] Figure 14 This is a three-dimensional structural diagram of the scraped-off adhesive component in this invention;

[0035] Figure label:

[0036] Curing kiln body 100, curing box unit 1, kiln door 10, water trough 11, drainage pipe 12, track 13, evaporation curing assembly 2, gas supply pipe 22, evaporation pipe arrangement 23, component mold trolley 3, mold locking assembly 4, drive shaft 41, front mounting base 42, rear mounting base 43, upper base 44, lower base 45, locking piece 40, mounting frame 401, front bevel gear 402, side bevel gear 403, rotating threaded rod 404, threaded section 405, smooth rod section 406, rotating hole 407, steam film removal assembly 5, bottom lifting mechanism Components include: scraper 50, drive motor 501, drive shaft 502, upper lifting plate 503, lower lifting plate 504, scraping moving component 51, moving plate 511, moving motor 512, chain 513, slide rail 514, sprocket 515, scraping angle adjusting component 6, adjusting motor 61, first gear 62, second gear 63, scraping plate 64, rotating shaft 65, flexible scraper 66, water guide groove 67, drainage groove 68, scraping bonding component 7, bonding base 71, horizontal plate 72, pressing plate 73, support 74, rotating screw 75, slide bar 76, and spring 77. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] The technical solution of a curing kiln for precast concrete components provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Reference Figures 1 to 14As shown, this embodiment of the invention provides a curing kiln for precast concrete components, including a curing kiln body 100. The curing kiln body 100 contains several equally spaced curing box units 1. Each curing box unit 1 contains an evaporative curing component 2, a component mold trolley 3, a mold locking component 4, and a steam film removal component 5. Each curing box unit 1 has a closable hinged kiln door 10. When the kiln door 10 is closed, the curing box unit 1 is in a sealed environment. Each curing box unit 1 contains two symmetrically arranged tracks 13. The evaporative curing component 2 is disposed within the curing box unit 1 to cure the precast concrete components. The component mold trolley 3 slides within the two tracks 13. The mold locking component 4 is disposed at the inner bottom of the curing box unit 1 to lock the component mold trolley 3 onto the two tracks 13. A water collection trough 11 is provided on one side of the interior of each curing box unit 1, and a drainage pipe 12 is provided on the water collection trough 11.

[0040] The water collection tank 11 can collect the water generated by steam and discharge it to the outside through the drain pipe 12.

[0041] This invention enables the removal of the vapor film on components. After removing the vapor film, high-temperature steam can directly contact the component surface, allowing heat to penetrate evenly and quickly into the component's interior. This effectively eliminates localized temperature differences and prevents surface cracking and internal micro-cracks caused by temperature stress, thus ensuring the structural integrity of the component from the root. Removing the vapor film allows for normal interaction between the component surface and the airflow and humidity of the curing environment, resulting in a more balanced evaporation and penetration of moisture. This effectively avoids the dual problems of "localized over-wetness" and "localized over-dryness," ensuring that the overall moisture content of the component meets curing standards and improving surface smoothness and structural density. Removing the vapor film allows all areas to simultaneously receive the heat and humidity of the steam, resulting in more uniform curing conditions. This ensures that the overall strength, hardness, durability, and other performance indicators of the component meet standards, reducing the defect rate caused by uneven curing. Furthermore, removing the vapor film significantly improves the thermal efficiency of the steam, allowing components to reach their design strength faster. For example, the initial and final setting times of concrete are shortened, allowing for a shorter curing cycle while maintaining quality. This increases the turnover rate of the curing kiln and the production efficiency of precast components, reducing the company's time costs and energy consumption.

[0042] Specifically, refer to Figure 5 As shown, the evaporative curing assembly 2 includes two gas supply pipes 22 and two evaporative pipe rows 23. The curing kiln body 100 includes a steam generator. The two evaporative pipe rows 23 are symmetrically and vertically fixed on both sides inside the curing chamber unit 1. The two gas supply pipes 22 are respectively connected between the steam generator and the evaporative pipe rows 23. The steam generator is existing technology and is located inside the curing kiln body 100 to generate steam for curing the components.

[0043] When curing components within the curing chamber 1, a steam generator produces steam. This steam is delivered through two gas supply pipes 22 to two evaporation pipe arrays 23, which then deliver the steam to the components within the curing chamber 1 for curing. The two sets of pipe arrays are evenly distributed along the length of the kiln, ensuring uniform diffusion of steam throughout the kiln space. This allows the high-temperature steam to fully envelop the components to be cured, providing a stable and uniform temperature and humidity environment. This ensures efficient cement hydration and completes the standardized curing process for the precast components. The mold locking assembly 4 achieves rapid and stable locking through gear transmission and threaded rod insertion. Compared to traditional manual fixing methods, this is more convenient and efficient, and the locking is secure and reliable. It effectively prevents the component mold carriage 3 from shifting during steam curing due to thermal expansion and contraction, steam flow impact, etc., ensuring the components are cured in a stable environment. This avoids uneven steam film distribution caused by positional changes, indirectly reducing the negative impact of the steam film on component curing.

[0044] Specifically, refer to Figure 7 and Figure 8 As shown, the mold locking assembly 4 includes a drive shaft 41, a front mounting base 42, a rear mounting base 43, and two locking members 40. The drive shaft 41 is horizontally rotatably connected to the bottom of the component mold carriage 3. The front mounting base 42 and the rear mounting base 43 are vertically arranged in front and behind the curing box unit 1 and located below the component mold carriage 3. The two locking members 40 are respectively connected to the bottom of the component mold carriage 3. When the rotating threaded rod 404 of the locking member 40 is inserted into the rotating hole 407 of the front mounting base 42 and the rear mounting base 43, locking is achieved. When it is necessary to lift the carriage, the connection point can be used as a hinge point to allow the carriage to rotate around it. The rear mounting base 43 is divided into an upper base 44 and a lower base 45. The upper base 44 is slidably connected to the lower base 45, and the upper base 44 slides relative to the lower base 45.

[0045] Each locking component 40 includes a mounting frame 401, a front bevel gear 402, two side bevel gears 403, and two rotating threaded rods 404. The mounting frame 401 is located at the bottom of the component mold trolley 3. The front bevel gear 402 is connected to the drive shaft 41. The two side bevel gears 403 are symmetrically rotatably connected to both sides of the mounting frame 401. The two rotating threaded rods 404 are coaxial with and threadedly connected to the two side bevel gears 403 respectively. The front bevel gear 402 and the two side bevel gears 403 mesh and drive each other. The rotating threaded rod 404 is provided with a threaded section 405 and a smooth section 406. The smooth section 406 is slidably engaged with the mounting frame 401. The front mounting seat 42 and the rear mounting seat 43 are provided with placement grooves for the mounting frame 401 to be placed. The two sides of the placement grooves are provided with rotating holes 407 that slide with the smooth section 406.

[0046] When the component mold trolley 3 needs to be locked, the operator rotates the drive shaft 41, which drives the front bevel gear 402 connected to it to rotate. The front bevel gear 402 meshes with two side bevel gears 403 symmetrically arranged in the mounting frame 401, causing the side bevel gears 403 to rotate, which in turn drives the rotating threaded rod 404 threadedly connected to it to rotate. Since the rotating threaded rod 404 is provided with a threaded section 405 and a smooth section 406, and the smooth section 406 is slidably engaged with the mounting frame 401, when the rotating threaded rod 404 rotates, it moves axially under the action of the thread. The smooth section 406 is inserted into the rotating holes 407 on both sides of the placement slots of the front mounting seat 42 and the rear mounting seat 43, locking the component mold carriage 3 on the track 13. When the component is steam cured, the position of the component mold carriage 3 can be locked and fixed, so as to lock and fix the position of the component. This can effectively prevent the component mold carriage 3 from shifting due to thermal expansion and contraction, steam flow impact and other factors during the steam curing process, ensuring that the component is cured in a stable environment, avoiding uneven distribution of steam film due to position changes, and indirectly reducing the negative impact of steam film on component curing.

[0047] After the component has been cured, the two smooth rod sections 406 can be moved out from the two rotating holes 407 so that the component mold trolley 3 can be moved out from the two tracks 13.

[0048] It should be noted that the smooth rod section 406 can drive the rotation hole 407 to rotate. The component mold trolley 3 is provided with a placement slot for placing components.

[0049] Specifically, the vapor film removal assembly 5 includes a bottom lifting removal component 50, a scraping moving component 51, a scraping angle adjusting component 6, and a scraping bonding component 7. The bottom lifting removal component 50 is mounted on the rear mounting base 43 and is rotatably connected to the curing box unit 1. The scraping moving component 51 is mounted on the inner top of the curing box unit 1 and is rotatably connected to the curing box unit 1. The scraping angle adjusting component 6 is mounted on the scraping moving component 51. There are two scraping bonding components 7, and the two scraping bonding components 7 are respectively mounted on the scraping angle adjusting component 6.

[0050] Specifically, refer to Figure 7 As shown, the bottom lifting removal component 50 includes a drive motor 501, a drive shaft 502, two upper lifting plates 503 and two lower lifting plates 504. The drive motor 501 is located on the outside of the maintenance box unit 1. The drive shaft 502 is horizontally rotatably connected between the maintenance box unit 1 and the two tracks 13. The two lower lifting plates 504 are symmetrically arranged on the drive shaft 502. The tops of the two upper lifting plates 503 are respectively hinged to the upper seat 44, and the bottoms of the two upper lifting plates 503 are respectively hinged to the two lower lifting plates 504.

[0051] When one side of the component mold trolley 3 needs to be lifted upwards, the drive motor 501 drives the drive shaft 502 to rotate on the curing box unit 1 and the two tracks 13, thereby driving the two lower lifting plates 504 to rotate. The rotation of the two lower lifting plates 504 drives the upper lifting plate 503 to move, thereby driving the upper seat 44 to move upwards relative to the lower seat 45, thus lifting one end of the component mold trolley 3 upwards. This allows the two smooth rod sections 406 on the mounting frame 401 to rotate in the two rotating holes 407, lifting the component mold trolley 3. The tilt angle adjustment range is 3°-15°. Utilizing gravity, the residual moisture or flowing vapor film on the component surface after the vapor film is scraped off flows rapidly along the inclined component surface to the water collection tank 11 on one side inside the curing box unit 1, and is discharged through the drainage pipe 12. Compared with the traditional natural drainage method, gravity-assisted drainage can remove residual moisture on the component surface more quickly and thoroughly, effectively preventing the secondary condensation of steam on the component surface to form a new vapor film. This reduces problems such as obstructed heat transfer and uneven curing caused by secondary vapor films, and improves the overall quality and efficiency of component curing.

[0052] Specifically, refer to Figure 10 As shown, the scraping moving part 51 includes a moving plate 511, a moving motor 512, a chain 513, two slide rails 514, and four sprockets 515. The two slide rails 514 are symmetrically arranged on the inner top of the curing box unit 1. The moving plate 511 is arranged on the two slide rails 514 and slides with the two slide rails 514. The four sprockets 515 are rotatably connected to the inner top of the curing box unit 1 in a rectangular shape, and the moving motor 512 is drivenly connected to one of the sprockets 515. The chain 513 is sleeved on the four sprockets 515, and one side of the chain 513 is connected to the moving plate 511.

[0053] When scraping off the vapor film on the component, the moving motor 512 drives one of the sprockets 515 to rotate, which in turn drives the other three sprockets 515 to rotate via the chain 513. This causes the moving plate 511 to move back and forth on the two slide rails 514, achieving full coverage scraping of the vapor film on the component surface. Compared with manual scraping, this method can remove the vapor film from the component surface more efficiently and comprehensively. The movement range and speed of the moving plate 511 can be flexibly adjusted according to the length and shape of different components to ensure that the vapor film is scraped off without dead corners, reducing component quality defects caused by vapor film residue.

[0054] Specifically, refer to Figure 11 and Figure 12As shown, the scraping angle adjustment component 6 includes an adjustment motor 61, a first gear 62, a second gear 63, two scraping plates 64, and two rotating shafts 65. The adjustment motor 61 is located inside the moving plate 511. The ends of the two scraping plates 64 are rotatably connected to each other. The two rotating shafts 65 are respectively connected to the two scraping plates 64. The first gear 62 and the second gear 63 are respectively connected to the two rotating shafts 65 and mesh with each other. The first gear 62 is connected to the main shaft of the adjustment motor 61. Each scraping plate 64 has a flexible scraper 66 at its bottom, and a water guide groove 67 is provided between the scraping plate 64 and the flexible scraper 66. With the water guide groove 67 between the scraping plate 64 and the flexible scraper 66, when the angle of the scraping plate 64 is adjusted, it can adapt to steam films of different thicknesses and shapes. The flexible scraper 66 scrapes the surface of the component, and the scraped water flows to both sides through the water guide groove 67 and is discharged.

[0055] When adjusting the scraping angle, the adjusting motor 61 drives the first gear 62 to rotate, which in turn drives the second gear 63 to rotate. The rotation of the first gear 62 and the second gear 63 drives the two rotating shafts 65 to rotate, thereby adjusting the angle of the two scraping plates 64. The angle of the scraping plates 64 can be dynamically adjusted according to the actual situation of the vapor film, so that the flexible scraper 66 can better fit the surface of the component. Whether the vapor film is thin or thick, it can be scraped efficiently. Compared with a fixed-angle scraping device, this design greatly improves the adaptability to vapor films under different working conditions, avoids vapor film residue or damage to the surface of the component due to improper scraping angle, and improves the effect of vapor film removal and the quality of component maintenance.

[0056] The angle of the scraper blades 64 can be dynamically adjusted to flexibly handle different situations: for thin vapor films, the angle between the two scraper blades 64 can be reduced to ensure that the scraper blades fit tightly against the surface of the component, and the flexible scraper blades 66 can be used to precisely break through the weak gas-liquid layer; when encountering thick vapor films, the angle can be increased to expand the area to be scraped in one go, avoiding water splashing or residue due to excessive film thickness, and ensuring efficient scraping under any working conditions; it can automatically adapt to the contour of the component and always maintain the optimal scraping angle; the strength of concrete components at different curing stages is different, and the requirements for scraping force and angle are also different.

[0057] Dynamically adjusting the 64° angle of the scraper blade can effectively remove the vapor film while avoiding damage to the component surface caused by improper angle. In the early stages of curing, when the component strength is low, reducing the 64° angle of the scraper blade lowers the contact pressure between the blade and the component surface, preventing scratches on the concrete. As curing progresses and the component strength increases, the angle can be adjusted appropriately to enhance the scraping effect. Throughout the entire curing cycle, this ensures both effective vapor film removal and comprehensive protection of the component's surface quality.

[0058] Specifically, refer to Figure 14 As shown, each of the scraping and bonding components 7 includes a bonding base 71, a horizontal plate 72, a pressing plate 73, a support 74, a rotating screw 75, and three sliding rods 76. The horizontal plate 72 is fixedly connected to the side wall of the scraping plate 64. The three sliding rods 76 are slidably connected to the horizontal plate 72 at equal intervals. The pressing plate 73 is horizontally positioned above the three sliding rods 76. The bonding base 71 is horizontally positioned at the bottom of the three sliding rods 76. A spring 77 is provided on the sliding rod 76 between the horizontal plate 72 and the pressing plate 73. The support 74 is horizontally positioned on the side wall of the scraping plate 64. The bottom of the rotating screw 75 is rotatably connected to the horizontal plate 72, and the rotating screw 75 is threadedly connected to the support 74. The bonding pressure between the flexible scraper 66 and the surface of the component is adjusted by the elastic action of the spring 77.

[0059] Rotating the screw 75, which is threadedly connected to the support 74, causes it to move axially upwards or downwards, thereby guiding the pressure plate 73 downwards via the three sliding rods 76. This, in turn, moves the bonding base 71 downwards, pressing the flexible scraper 66 onto the component surface. The contact distance and pressure between the flexible scraper 66 and the component can be flexibly adjusted according to the vapor film thickness and the surface flatness of the component. This ensures effective removal of the vapor film while avoiding damage to the component surface due to excessive pressure or incomplete removal due to insufficient pressure.

[0060] This design avoids localized lifting of the scraper blade due to single-point force, ensuring a consistent contact pressure difference between the scraper blade and the component surface. Whether on a flat area or a surface with minor irregularities, such as slight pitting in the early stages of curing, the scraper blade can fully adhere to the surface, completely removing the 0.1-0.5mm thick vapor film. This avoids the localized vapor film residue caused by uneven pressure in traditional manual pressing. For thin vapor films, simply move the screw down slightly to allow the scraper blade to lightly touch the surface for removal. For thick vapor films, the downward movement can be increased to allow the scraper blade to properly embed into the gas-liquid mixture layer, ensuring thorough removal in one go. This avoids "incomplete removal" due to insufficient adhesion or moisture being squeezed into component gaps due to excessive adhesion.

[0061] Specifically, refer to Figure 13As shown, the flexible scraper 66 is located at the bottom of the scraping plate 64 and extends to the bottom of the base 71. This extension allows for coverage of a larger area, especially when scraping vapor films near the edge or bottom of components. No additional scraping adjustment is needed to complete the scraping in one go, improving efficiency and reducing vapor film residue caused by repeated operations. The bottom of the flexible scraper 66 has a drainage groove 68, which quickly collects residual moisture after the vapor film is removed. Its trough-like structure uses gravity to guide water flow along the trough to both sides, ultimately draining into the water collection trough 11 of the curing kiln. This prevents moisture from stagnating on the component surface or in the contact area between the scraper and the component, reducing the possibility of secondary vapor film formation. The drainage groove 68 alters the water flow path, ensuring water flows only in a specific direction, effectively preventing backflow into the scraped area due to scraper movement or component tilting, ensuring the component surface remains dry after scraping. The scraping surface of the flexible scraper 66 is designed as an arc surface. This arc surface design allows the flexible scraper 66 to better conform to complex curved surfaces or uneven areas when in contact with the component surface. Compared to a flat scraper, the arc surface can adaptively deform under pressure, filling in depressions on the component surface and ensuring that the vapor film is completely and thoroughly scraped away without leaving any dead corners. The edges of the arc surface are rounded and smooth, so even if it encounters protrusions or sharp corners on the component surface during the scraping process, it will not cause scratches or wear to the component like a right-angle scraper, effectively protecting the surface integrity of the precast concrete component and maintaining the component's appearance quality and structural strength.

[0062] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A curing kiln for precast concrete components, characterized in that, The system includes a curing kiln body (100), which contains several curing box units (1) arranged at equal intervals. Each curing box unit (1) contains an evaporation curing component (2), a component mold trolley (3), a mold locking component (4), and a steam film removal component (5). The curing box unit (1) is equipped with a closable hinged kiln door (10), and the curing box unit (1) is equipped with two symmetrically arranged tracks (13). The evaporative curing component (2) is installed inside the curing box unit (1) to cure the precast concrete components. The component mold trolley (3) slides within two tracks (13), and the mold locking assembly (4) is located at the inner bottom of the curing box unit (1) to lock the component mold trolley (3) onto the two tracks (13). The maintenance box unit (1) has a water collection tank (11) on one side inside, and a drainage pipe (12) is provided on the water collection tank (11). The mold locking assembly (4) includes a drive shaft (41), a front mounting base (42), a rear mounting base (43), and two locking parts (40). The drive shaft (41) is horizontally rotatably connected to the bottom of the component mold carriage (3). The front mounting base (42) and the rear mounting base (43) are vertically arranged in front and behind the curing box unit (1) and located below the component mold carriage (3). The two locking parts (40) are respectively connected to the bottom of the component mold carriage (3). When the rotating threaded rod (404) of the locking part (40) is inserted into the rotating hole (407) of the front mounting base (42) and the rear mounting base (43), locking is achieved. The rear mounting base (43) is divided into an upper seat (44) and a lower seat (45). The upper seat (44) is slidably connected to the lower seat (45). The vapor film removal assembly (5) includes a bottom lifting removal component (50), a scraping moving component (51), a scraping angle adjusting component (6), and a scraping bonding component (7). The bottom lifting removal component (50) is mounted on the rear mounting base (43) and is rotatably connected to the curing box unit (1). The scraping moving component (51) is mounted on the inner top of the curing box unit (1) and is rotatably connected to the curing box unit (1). The scraping angle adjusting component (6) is mounted on the scraping moving component (51). There are two scraping bonding components (7), and the two scraping bonding components (7) are respectively mounted on the scraping angle adjusting component (6). The bottom lifting removal component (50) includes a drive motor (501), a drive shaft (502), two upper lifting plates (503) and two lower lifting plates (504). The drive motor (501) is located on the outside of the maintenance box unit (1). The drive shaft (502) is horizontally rotatably connected between the maintenance box unit (1) and the two tracks 13. The two lower lifting plates (504) are symmetrically arranged on the drive shaft (502). The tops of the two upper lifting plates (503) are respectively hinged to the upper seat (44), and the bottoms of the two upper lifting plates (503) are respectively hinged to the two lower lifting plates (504). The scraping moving part (51) includes a moving plate (511), a moving motor (512), a chain (513), two slide rails (514) and four sprockets (515). The two slide rails (514) are symmetrically arranged on the inner top of the maintenance box unit (1). The moving plate (511) is arranged on the two slide rails (514) and slides with the two slide rails (514). The four sprockets (515) are rotatably connected to the inner top of the maintenance box unit (1) in a rectangular shape, and the moving motor (512) is connected to one of the sprockets (515) in a transmission connection. The chain (513) is sleeved on the four sprockets (515), and one side of the chain (513) is connected to the moving plate (511). The scraping angle adjustment component (6) includes an adjustment motor (61), a first gear (62), a second gear (63), two scraping plates (64), and two rotating shafts (65). The adjustment motor (61) is located inside the moving plate (511). The ends of the two scraping plates (64) are rotatably connected to each other. The two rotating shafts (65) are respectively connected to the two scraping plates (64). The first gear (62) and the second gear (63) are respectively connected to the two rotating shafts (65). The first gear (62) and the second gear (63) mesh with each other. The first gear (62) is connected to the main shaft of the adjustment motor (61). Each scraping plate (64) has a flexible scraper (66) at its bottom. A water guide groove (67) is provided between the scraping plate (64) and the flexible scraper (66). Each of the scraping and bonding components (7) includes a bonding base (71), a horizontal plate (72), a pressing plate (73), a support (74), a rotating screw (75), and three sliding rods (76). The horizontal plate (72) is fixedly connected to the side wall of the scraping plate (64). The three sliding rods (76) are slidably connected to the horizontal plate (72) at equal intervals. The pressing plate (73) is horizontally arranged at the top of the three sliding rods (76). The bonding base (71) is horizontally arranged at the bottom of the three sliding rods (76). A spring (77) is provided on the sliding rod (76) between the horizontal plate (72) and the pressing plate (73). The support (74) is horizontally arranged on the side wall of the scraping plate (64). The bottom of the rotating screw (75) is rotatably connected to the horizontal plate (72), and the rotating screw (75) is threadedly connected to the support (74). The flexible scraper (66) is located at the bottom of the scraping plate (64) and extends to the bottom of the base (71). The bottom of the flexible scraper (66) is provided with a drainage groove (68), and the scraping surface of the flexible scraper (66) is designed as an arc surface.

2. The curing kiln for precast concrete components according to claim 1, characterized in that: The evaporation curing component (2) includes two gas supply pipes (22) and two evaporation pipes (23). The curing kiln body (100) includes a steam generator. The two evaporation pipes (23) are symmetrically and vertically fixed on both sides inside the curing box unit (1). The two gas supply pipes (22) are respectively connected between the steam generator and the evaporation pipes (23).

3. The curing kiln for precast concrete components according to claim 1, characterized in that: Each of the locking components (40) includes a mounting frame (401), a front bevel gear (402), two side bevel gears (403), and two rotating threaded rods (404). The mounting frame (401) is located at the bottom of the component mold trolley (3). The front bevel gear (402) is connected to the drive shaft (41). The two side bevel gears (403) are symmetrically rotatably connected to both sides inside the mounting frame (401). The two rotating threaded rods (404) are respectively connected to the two side bevel gears (402 and 403). 3) Coaxial and threaded connection, the front bevel gear (402) and the two side bevel gears (403) mesh and drive each other, the rotating threaded rod (404) is provided with a threaded section (405) and a smooth rod section (406), the smooth rod section (406) slides with the mounting frame (401), the front mounting seat (42) and the rear mounting seat (43) are provided with a placement groove for the mounting frame (401) to be placed, and the two sides of the placement groove are provided with a rotating hole (407) that slides with the smooth rod section (406).

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