Precast concrete member

Abstract

The utility model belongs to the technical field of prefabricated reinforced concrete structures, and particularly relates to a prefabricated concrete member. Comprising a precast concrete member body; the curing assembly can provide continuous and effective curing in the hardening process of the prefabricated concrete member main body; the maintenance assembly comprises a maintenance frame; the transverse plates are arranged on the left and right sides of the curing frame; the bearings are arranged on the transverse plate, and the multiple bearings are arranged; the pulleys are rotationally arranged on the bearings, and the pulleys on the two sides are correspondingly arranged; the water box is arranged on the curing frame; the multiple spraying rods are evenly distributed in the length direction of the water box at intervals, and the spraying rods are located below the pulleys; and the supporting assembly is arranged on the pulley and used for supporting the prefabricated concrete member body to be located above the spraying rod. The utility model provides a precast concrete member which can provide continuous and effective maintenance in the hardening process of the precast concrete member, can reduce the shrinkage of concrete to a certain extent, and avoids the generation of cracks.

Description

Technical Field

[0001] This utility model belongs to the field of precast reinforced concrete structure technology, and in particular relates to a precast concrete component. Background Technology

[0002] Precast concrete components, as an important part of modern construction and infrastructure engineering, have been widely used in various construction projects due to their high production efficiency, good quality control, and resource-saving characteristics. The production process of precast concrete components is usually completed in a factory, which not only improves production efficiency but also effectively ensures the quality of the concrete components. Because precast concrete components can be produced in a standardized manner in a factory, the complexity and uncertainty of on-site construction are reduced, making it one of the important ways to achieve energy conservation, emission reduction, efficient resource utilization, and sustainable development in the current construction industry.

[0003] Utility model patent CN220741572U discloses a precast concrete component, including a base. Component modules are inserted into the top of the base, and these modules are arranged in four sections, forming a rectangular structure. The bottom of each component module has a plug that matches a slot at the top of the base. A heater is fixedly installed inside the base. Support columns are located on opposite sides of the base, and a top column is fixedly connected between the two support columns. A compaction roller is located directly below the top column. The plug-in component modules not only facilitate disassembly and installation but also allow for the casting of different precast concrete components based on different component module structures. The heater inside the base accelerates concrete setting, while the compaction roller at the top compacts the concrete surface, improving the manufacturing efficiency and quality of the precast concrete component.

[0004] While this technology facilitates disassembly and installation, and allows for the casting of different precast concrete components based on varying structural modules, thus improving manufacturing efficiency and quality, a significant problem often arises during the production of precast concrete components, particularly in the hardening stage—shrinkage. During the cement hydration reaction, water is gradually released from the cement paste, causing a change in the volume of the concrete, typically manifested as shrinkage. This shrinkage can lead to internal stress within the concrete, potentially causing cracks.

[0005] If the curing conditions of precast components are not ideal during the hardening process, the moisture loss from the concrete surface will be too rapid, and shrinkage will be more pronounced, thus exacerbating crack formation. Especially under high temperature and dry conditions, the rapid evaporation of moisture and the resulting severe surface moisture loss create a significant difference in humidity between the concrete's interior and surface, leading to substantial shrinkage stress. If this shrinkage stress exceeds the tensile strength of the concrete, cracks will occur, severely impacting the structural performance and durability of the precast concrete components. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a precast concrete component that can provide continuous and effective curing during the hardening process of the precast concrete component, thereby reducing concrete shrinkage to a certain extent and preventing cracks.

[0007] In view of this, the present invention provides a precast concrete component, comprising:

[0008] Precast concrete main body;

[0009] Curing components provide continuous and effective curing during the hardening process of precast concrete components, thereby improving the quality and durability of the precast concrete components.

[0010] The maintenance components include:

[0011] Maintenance rack;

[0012] Horizontal plates are installed on the left and right sides of the curing frame. There are multiple horizontal plates, which are evenly spaced along the length of the curing frame.

[0013] Bearings are mounted on a horizontal plate. There are multiple bearings, which are evenly spaced along the length of the horizontal plate.

[0014] The pulleys are rotatably mounted on the bearings, with corresponding pulleys on both sides;

[0015] Water boxes are mounted on the maintenance rack, and there are multiple water boxes.

[0016] The spray bar has multiple bars, which are evenly spaced along the length of the water box, and the spray bar is located below the pulley;

[0017] The support assembly, mounted on the pulley, is used to support the main body of the precast concrete component above the spray bar.

[0018] In the above technical solution, the supporting components further include:

[0019] A support frame is set on pulleys, and the main body of the precast concrete component is located inside the support frame;

[0020] Fixed plates are installed on both sides inside the support frame to support the main body of the precast concrete components inside the support frame;

[0021] The handle is located on the front side of the support frame.

[0022] In any of the above technical solutions, the support frame is further provided with a sliding groove for the fixed plate to slide, and a locking component for locking the fixed plate on the support frame.

[0023] In any of the above technical solutions, the locking component further includes:

[0024] Connecting blocks are located at the front and rear ends of the left and right sides of the support frame, and the connecting blocks are located above the slide groove;

[0025] Locking blocks are located at the front and rear ends of the outer side of the fixing plate, and the locking blocks are located below the connecting blocks.

[0026] A fixing hole is provided on the connecting block;

[0027] A keyhole is formed on the lock block, and the keyhole corresponds to the fixing hole;

[0028] The latch is slidably positioned between the fixing hole and the lock hole.

[0029] In any of the above technical solutions, the maintenance frame is further provided with wheels at the bottom.

[0030] In any of the above technical solutions, a protrusion is provided on one side of the precast concrete component body and a groove is provided on the other side. The protrusion is inserted into the groove to realize the splicing of two precast concrete component bodies.

[0031] The beneficial effects of this utility model are:

[0032] 1. Open the water supply valve of the water box. Water flows into the spray bar under the action of gravity or pressure. Because the spray bar is evenly distributed and precisely corresponds to the position of the component, the water is sprayed out evenly in a mist from the spray bar nozzle, fully covering the surface of the component. The precast concrete component body is then moistened and cured, ensuring that the surface of the component is always moist, meeting the humidity conditions required for concrete hardening, and minimizing problems such as cracks and insufficient strength caused by improper curing.

[0033] 2. During the curing period, if the position of the main body of the precast concrete component needs to be adjusted due to site layout optimization, water spray uniformity adjustment, etc., the curing position of the component is changed by the rotation characteristics of the pulley to ensure that each component can get the best curing effect and that the curing water sprayed by the spray bar below evenly covers the surface of the component, so as to achieve efficient curing and avoid uneven curing caused by component displacement, which would affect the final quality of the component.

[0034] 3. After the precast concrete component completes the predetermined curing period and reaches the expected strength and quality standards, the user pulls out the support frame and the fixing plate from the chute, so that the precast concrete component can be removed from the support frame and the cured concrete component can be taken out, thus completing the separation of the support assembly and the component.

[0035] 4. After the fixed plate is positioned, the user holds the fixed plate steady with one hand to prevent it from sliding accidentally, and picks up the pin with the other hand and inserts it into the fixing hole and the corresponding lock hole, ensuring that it completely penetrates both holes and fits tightly against the hole wall to complete the final locking of the fixed plate. At this time, the component can be placed stably in the support frame and the curing process can begin.

[0036] 5. In different site environments such as prefabrication plants or construction sites, users can easily push the curing frame and flexibly adjust the curing position of components according to actual needs, optimize site space utilization, and improve production efficiency. During the curing period, users can push the curing frame in a timely manner according to the actual situation, such as site layout adjustments and differences in component curing progress, and use the wheel movement characteristics to change the curing position of components to ensure that each component can get the best curing effect.

[0037] 6. The simple connection between the protruding strip and the slot effectively solves the complexity and construction difficulty of precast concrete components in on-site splicing, enabling the components to be spliced ​​together quickly and firmly. This not only improves construction efficiency but also enhances the strength and stability of the spliced ​​parts, ultimately ensuring the quality and safety of the project. Attached Figure Description

[0038] Figure 1 This is a first three-dimensional structural schematic diagram of this utility model;

[0039] Figure 2 This is a schematic diagram of the second three-dimensional structure of this utility model;

[0040] Figure 3 This is a three-dimensional structural diagram of the maintenance component of this utility model;

[0041] Figure 4 This is a three-dimensional structural diagram of the support component of this utility model;

[0042] Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention;

[0043] Figure 6 This is a three-dimensional structural diagram of the locking component of this utility model;

[0044] Figure 7 This is a three-dimensional structural diagram of the main body splicing of the precast concrete component of this utility model;

[0045] The attached figures are labeled as follows: 1. Main body of precast concrete component; 2. Curing component; 20. Curing frame; 21. Horizontal plate; 22. Bearing; 23. Pulley; 24. Water box; 25. Spray bar; 3. Support component; 31. Support frame; 32. Fixing plate; 33. Handle; 4. Slide groove; 5. Locking component; 51. Connecting block; 52. Locking block; 53. Fixing hole; 54. Locking hole; 55. Pin; 6. Wheel; 7. Protrusion; 8. Slot. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0047] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0048] Example 1:

[0049] like Figures 1-3 As shown, this embodiment provides a precast concrete component, including:

[0050] Precast concrete main body 1;

[0051] Curing component 2 provides continuous and effective curing during the hardening process of the precast concrete component body 1, thereby improving the quality and durability of the precast concrete component body 1;

[0052] The maintenance component 2 includes:

[0053] 20 maintenance racks;

[0054] Horizontal plates 21 are provided on the left and right sides of the curing frame 20. There are multiple horizontal plates 21, which are evenly distributed along the length of the curing frame 20.

[0055] Bearing 22 is disposed on horizontal plate 21. There are multiple bearings 22, which are evenly spaced along the length of horizontal plate 21.

[0056] Pulley 23 is rotatably mounted on bearing 22, with corresponding pulleys 23 on both sides;

[0057] Water boxes 24 are mounted on the maintenance rack 20, and there are multiple water boxes 24;

[0058] The spray bar 25 has multiple bars, which are evenly spaced along the length of the water box 24, and the spray bar 25 is located below the pulley 23;

[0059] Support component 3 is mounted on pulley 23 and is used to support the main body 1 of the precast concrete component above the spray bar 25.

[0060] In this technical solution, the support component 3 is mounted on pulley 23, which stably supports the precast concrete component body 1 and ensures the component is accurately positioned above the spray bar 25. This design facilitates subsequent curing operations and ensures that the component does not shift during curing, maintaining the uniformity and effectiveness of curing. The pulley 23 is rotatably mounted on bearing 22, with corresponding pulleys on both sides, giving the support component 3 flexible movement capabilities. Users can easily push the precast concrete component body 1 within the support component 3, improving production efficiency. Water boxes 24 are rationally distributed along the curing frame 20, storing sufficient curing water. Multiple spray bars 25 are evenly spaced below the pulley 23 along the length of the water box 24. When the water box 24 supplies water, the spray bars 25 can evenly spray water onto the precast concrete component body 1 above it, ensuring that all parts of the component receive equal and continuous moisture, avoiding localized dryness or over-wetting, and achieving high-quality curing.

[0061] Workflow: Before the precast concrete component is fully hardened after production, place it on the support component 3 of the curing component 2, ensuring that the component is stable and accurately positioned above the spray bar 25. Simultaneously, check the water level in the water box 24 to ensure sufficient curing water, that all spray bars 25 are properly connected without blockages or leaks, that the pulleys 23 rotate freely, and that the overall structure of the curing frame 20 is stable.

[0062] Curing start-up phase: Open the water supply valve of water box 24, and water flows into spray bar 25 under the action of gravity or pressure. Since the spray bar 25 is evenly distributed and precisely corresponds to the position of the component, the water is sprayed out evenly in a mist from the nozzle of the spray bar 25, fully covering the surface of the component, and the wet curing of the precast concrete component body 1 begins.

[0063] Continuous curing phase: During the component hardening process, water is continuously supplied, and the spray bar 25 continuously sprays water onto the component to ensure that the component surface remains moist, meeting the humidity requirements for concrete hardening. During the curing period, the user can adjust the position of the precast concrete component body 1 as needed. The pulley 23 and bearing 22 work together to ensure that the support assembly 3 can be moved smoothly when necessary without affecting the water spraying operation. Pushing the support assembly 3, the rotation characteristics of the pulley 23 are used to change the curing position of the component, ensuring that each component receives the best curing effect.

[0064] Final Curing Stage: Once the precast concrete component has reached the predetermined hardening time and its strength and quality meet the requirements, the water supply valve of water box 24 is closed, and water spraying for curing is stopped. The cured component is lifted off the support assembly 3, and the curing assembly 2 is cleaned, inspected, and maintained to prepare for the next batch of precast concrete component curing operations. This ensures that the main body 1 of the precast concrete component receives sufficient and continuous effective curing during the hardening process, improving the quality of the component. Through precise curing operations, problems such as cracks and insufficient strength caused by improper curing are minimized, ensuring that the component has good structural performance and meets the stringent strength and stability requirements of building engineering. This also improves the durability of the precast concrete component, enabling it to resist the effects of external environmental factors such as wind and rain erosion, temperature changes, and chemical corrosion during long-term use, extending the service life of the component and reducing the maintenance costs of the building throughout its service life.

[0065] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the optimized support component 3 includes:

[0066] The support frame 31 is set on the pulley 23, and the precast concrete component body 1 is located inside the support frame 31;

[0067] The fixing plate 32 is disposed on both sides inside the support frame 31 and is used to support the main body 1 of the precast concrete component inside the support frame 31.

[0068] Handle 33 is located on the front side of support frame 31.

[0069] In this technical solution, after the precast concrete component is demolded and enters the curing process, the user holds the handle 33 to stabilize the support frame 31 and pull it out. With the help of pulleys 23, the movement of the support frame 31 is made easier. Then, the main body 1 of the precast concrete component is placed into the support frame 31, with the main body positioned on the fixing plate 32. The fixing plate 32 and the support frame 31 provide support for the component. Next, the handle 33 is pushed to move the support frame 31 onto the curing frame 20. The pulleys 23 assist the support frame 31 in sliding into the curing frame 20. The support frame 31 supports the concrete component above the spray bar 25, ensuring the component is level. After the component is in place, the fixing plates 32 on both sides inside the support frame 31 automatically and tightly fit against the sides of the component, providing stable support from both sides and preventing the component from shaking. At this time, the bottom of the component is supported by the bottom plane of the support frame 31 and works together with the pulley 23 to ensure that the component can maintain a stable and accurate position whether it is stationary or moving during the curing period, and ensure that the curing water sprayed by the spray bar 25 below evenly covers the surface of the component, thus achieving efficient curing.

[0070] During the curing process, if the component needs to be moved due to site layout optimization, water spray uniformity adjustment, or other requirements, the user walks to the front of the curing frame 20, holds the handle 33 with one or both hands, and applies appropriate forward, backward, or lateral pushing force according to the direction of movement. This pushing force is transmitted to the pulley 23 through the support frame 31. The pulley 23 rolls smoothly with the cooperation of the bearing 22, driving the component to move steadily along the track of the curing frame 20 to the new curing area. During the process, the user can sense the movement status of the component at any time through the handle 33 to ensure safe and precise operation. This provides a stable and suitable support structure for the precast concrete component body 1, ensuring that the component is always in the correct position throughout the curing process and maintains a precise relative positional relationship with components such as the spray bar 25 of the curing component 2. This allows the curing operation to be carried out accurately and efficiently, avoiding uneven curing caused by component displacement and affecting the final quality of the component.

[0071] Example 2:

[0072] This embodiment provides a precast concrete component, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] like Figure 2 , Figure 4 and Figure 6 As shown, in this embodiment, the support frame 31 is provided with a sliding groove 4 for the fixed plate 32 to slide, and a locking component 5 is provided to lock the fixed plate 32 on the support frame 31.

[0074] In this technical solution, after the precast concrete component completes the predetermined curing cycle and reaches the expected strength and quality standards, the user pulls out the support frame 31 again, holds the handle 33 to stabilize the component, and then pulls out the fixing plate 32 from the slide 4. The fixing plate 32 moves outward along the slide 4, so that the precast concrete component falls off the support frame 31, so that the cured concrete component can be taken out and transferred to the subsequent storage or processing area, thus completing the separation of the support component 3 from the component. Then, the support component 3 is inspected and cleaned to prepare for the next round of component curing tasks.

[0075] like Figure 5 and Figure 6 As shown, in this embodiment, the optimized locking component 5 includes:

[0076] Connecting blocks 51 are located at the front and rear ends of the left and right sides of the support frame 31, and the connecting blocks 51 are located above the slide groove 4;

[0077] Locking block 52 is located at the front and rear ends of the outer side of fixing plate 32, and is located below connecting block 51;

[0078] A fixing hole 53 is provided on the connecting block 51;

[0079] A lock hole 54 is provided on the lock block 52, and the lock hole 54 corresponds to the fixing hole 53;

[0080] The pin 55 is slidably positioned between the fixing hole 53 and the locking hole 54. The maintenance frame 20 is equipped with wheels 6 at its bottom.

[0081] This technical solution provides a mechanism for flexibly adjusting the position of the fixing plate 32. After the component curing is completed, the fixing plate 32 is pulled out, allowing the component to detach from the support frame 31 and be removed. This ensures that the fixing plate 32 is securely locked after being adjusted to the appropriate position, guaranteeing that even if the component is subjected to external forces such as vibration or handling during curing, the fixing plate 32 remains stably fixed to the support frame 31, maintaining reliable support for the component and preventing safety hazards such as component shaking or slippage caused by displacement of the fixing plate 32. This ensures the smooth progress of the precast concrete component curing operation.

[0082] Workflow: Before undertaking a new batch of precast concrete component maintenance tasks, check the status of each component of the locking assembly 5 to ensure that there are no debris in the slide 4 that obstructs the sliding of the fixing plate 32, that the connecting block 51 is firmly welded to the support frame 31, that the locking block 52 is reliably connected to the fixing plate 32, and that the pin 55 is free from deformation and corrosion and can be smoothly inserted and removed in the fixing hole 53 and the locking hole 54.

[0083] When the precast concrete component 1 that needs maintenance is placed above the support frame 31 but has not yet been fully seated, the user pushes the fixing plates 32 on both sides with both hands to slide them inward along the slide groove 4 and adjusts the fixing plates 32 to their original positions.

[0084] After the fixed plate 32 is positioned correctly, the user should focus on the locking component 5. Hold the fixed plate 32 steady with one hand to prevent accidental slippage, and with the other hand, pick up the pin 55. First, align one end of the pin 55 with the fixing hole 53 on the connecting block 51, then gently insert it, allowing it to pass through the fixing hole 53 and continue downwards until it is successfully inserted into the corresponding locking hole 54 on the locking block 52. During insertion, the pin 55 can be gently shaken to ensure it completely penetrates both holes and fits tightly against the hole walls, completing the final locking of the fixed plate 32. At this point, the component can be stably placed inside the support frame 31, and the maintenance process can begin.

[0085] When the precast concrete component has been cured and needs to be removed and the support frame 31 adjusted for the next use, the user first pulls out the pin 55. Holding the pin 55 with both hands, apply appropriate external force to slowly pull it out of the locking hole 54 and fixing hole 53, releasing the locking constraint on the fixing plate 32. Pull the fixing plate 32 outward from the slide groove 4, causing the component to detach from the support frame 31, allowing the user to remove it. This process removes the cured component. Then, according to the size requirements of the next component, the adaptation and adjustment process is repeated, pushing the fixing plate 32 to a new suitable position for a new round of locking and component curing operations.

[0086] Example 3:

[0087] This embodiment provides a precast concrete component, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0088] like Figures 1-3 As shown, in this embodiment, the optimized maintenance frame 20 is provided with wheels 6 at the bottom.

[0089] In this technical solution, users can easily move the curing frame 20 in different site environments such as prefabrication plants or construction sites, flexibly adjust the curing position of components according to actual needs, optimize site space utilization, and improve production efficiency. During the curing period, users can move the curing frame 20 in a timely manner according to actual conditions, such as site layout adjustments and differences in component curing progress, and use the mobility of the wheels 6 to change the curing position of components to ensure that each component receives the best curing effect.

[0090] like Figure 7 As shown, in this embodiment, the precast concrete component body 1 is optimized by having a protrusion 7 on one side and a slot 8 on the other side. The protrusion 7 is inserted into the slot 8 to achieve splicing of two precast concrete component bodies 1.

[0091] In this technical solution, precast concrete components are manufactured in a factory according to engineering design requirements. During the prefabrication process, each precast component has a protrusion 7 on one side and a corresponding groove 8 on the other. The size, shape, and position of these protrusions 7 and grooves 8 are precisely designed to ensure a perfect fit during assembly. The finished precast concrete components are transported to the construction site, where appropriate protection is provided to ensure the protrusions 7 and grooves 8 are not damaged. At the construction site, the user aligns the precast concrete components to be assembled. Using a simple insertion method, the protrusion 7 of one component is inserted into the groove 8 of another component. This step typically requires no special tools and is simple and efficient. Once the protrusions 7 and grooves 8 are fully aligned, the connection between the components is securely completed, ensuring a strong bond at the joint. After assembly, the user can check the stability of the connection, ensuring that all protrusions 7 are fully inserted into the grooves 8 without loosening or misalignment. Ultimately, the precast concrete components spliced ​​together by the protrusions 7 and the slots 8 will form an integral structure, achieving the load-bearing capacity and function required by the design.

[0092] The fit between the protruding strip 7 and the slot 8 ensures a firm bond between two concrete components after splicing, enhancing the structural strength of the connection and preventing loosening or detachment during use. Compared to traditional connection methods (such as bolts, welding, or concrete pouring), the splicing method using the protruding strip 7 and slot 8 is simpler and faster. Users only need to insert the precast components to complete the connection, eliminating the need for additional complex operations and greatly improving construction efficiency. Using the protruding strip 7 and slot 8 reduces the need for on-site processing and adjustment of precast components, avoiding splicing problems caused by unevenness or errors on site. Precast components can be precisely processed in the factory, requiring only splicing on site, ensuring quality and accuracy. This design is suitable for various specifications and types of precast concrete components. Different sizes and shapes of the protruding strip 7 and slot 8 can be designed according to specific project requirements to meet the splicing needs of different projects. The tight fit between the protruding strip 7 and slot 8 makes the splicing between precast concrete components more stable, reducing potential safety hazards caused by loosening or displacement of the splicing parts and enhancing the overall structural stability.

[0093] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A precast concrete component, characterized in that, include: Precast concrete main body (1); The curing component (2) provides continuous and effective curing during the hardening process of the precast concrete component body (1), thereby improving the quality and durability of the precast concrete component body (1); The maintenance component (2) includes: Maintenance rack (20); A horizontal plate (21) is provided on the left and right sides of the maintenance frame (20). There are multiple horizontal plates (21) and they are evenly spaced along the length of the maintenance frame (20). Bearings (22) are disposed on the horizontal plate (21). There are multiple bearings (22) and they are evenly spaced along the length direction of the horizontal plate (21). The pulleys (23) are rotatably mounted on the bearings (22), and the pulleys (23) on both sides are correspondingly arranged; A water box (24) is disposed on the maintenance frame (20), and the water box (24) has multiple components; The spray bar (25) has multiple bars, which are evenly spaced along the length of the water box (24), and the spray bar (25) is located below the pulley (23); A support assembly (3) is disposed on the pulley (23) and the support assembly (3) is used to support the precast concrete component body (1) above the spray bar (25).

2. A precast concrete component according to claim 1, characterized in that, The support component (3) includes: A support frame (31) is set on the pulley (23), and the precast concrete component body (1) is located inside the support frame (31); Fixing plates (32) are provided on both sides inside the support frame (31) to support the main body (1) of the precast concrete component inside the support frame (31); A handle (33) is provided on the front side of the support frame (31).

3. A precast concrete component according to claim 2, characterized in that, The support frame (31) is provided with a sliding groove (4) for the fixed plate (32) to slide, and a locking component (5) for locking the fixed plate (32) on the support frame (31).

4. A precast concrete component according to claim 3, characterized in that, The locking component (5) includes: Connecting blocks (51) are provided at the front and rear ends of the left and right sides of the support frame (31), and the connecting blocks (51) are located above the slide groove (4); Locking blocks (52) are provided at the front and rear ends of the outer side of the fixing plate (32), and the locking blocks (52) are located below the connecting block (51); A fixing hole (53) is provided on the connecting block (51); A lock hole (54) is provided on the lock block (52), and the lock hole (54) corresponds to the fixing hole (53); The pin (55) is slidably disposed between the fixing hole (53) and the locking hole (54).

5. A precast concrete component according to claim 1, characterized in that, The maintenance frame (20) is equipped with wheels (6) at the bottom.

6. A precast concrete component according to claim 1, characterized in that, The precast concrete component body (1) has a protrusion (7) on one side and a slot (8) on the other side. The protrusion (7) is inserted into the slot (8) to achieve splicing of two precast concrete component bodies (1).

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