Concrete precast component production line

Abstract

The application discloses a kind of prefabricated concrete production lines, including operation system, transfer system and maintenance system, material is transferred between operation system and maintenance system by transfer system;The operation system includes conveying system, distribution system, vibration system;The conveying system includes front-end chain conveying system, end chain conveying system and step conveying system;The step conveying system includes lifting mechanism and transmission bracket;The front-end chain conveying system and end chain conveying system are respectively provided with deviation rectifying device.There are beneficial effects: the production line of the application is simple in structure, small in investment and flexible in production;It can improve the production capacity and production efficiency of production line, reduce labor intensity;It can improve the pouring efficiency and pouring quality;The prefabricated part of U type ensures the flatness in foundation pit, improves the installation accuracy of operation line.The deviation rectifying device timely adjusts the accuracy of mold position, and guarantees the mold assembly line operation process.

Description

Technical Field

[0001] This invention relates to a production line, and more particularly to a precast concrete component production line, belonging to the field of precast concrete component production technology. Background Technology

[0002] Precast concrete components are building components made in a factory using concrete as the basic material. They include beams, slabs, columns, and architectural finishing accessories.

[0003] The production process of precast concrete components involves prefabricating concrete parts for buildings or structures in a factory or on-site. Currently, there are two main production methods: on-site casting and factory mass production. However, on-site casting suffers from low levels of industrialization due to manual labor, high labor intensity, and low production efficiency. Factory mass production, on the other hand, requires a production line tailored to the specific production process. This line is typically built within a factory building. After reinforcement is placed within the mold, a crane lifts the mold to a designated position, and a pouring machine pours concrete into the mold. After vibration by a vibrating beam or table, the mold and the formed component are transported by crane for curing. Once curing is complete, the molded component is demolded, separating it from the mold to obtain the finished precast concrete component. Factory mass production suffers from drawbacks such as large production line footprint, high investment costs, inability to relocate, poor flexibility, and limited product variety. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to address the problems existing in the prior art by providing a precast concrete component production line with a simple structure, small footprint, low investment, and flexible production. This invention is equipped with complete supporting equipment and has a high degree of automation, which can improve the production capacity and efficiency of the production line and effectively reduce the labor intensity of personnel.

[0005] Technical solution: A precast concrete component production line includes an operating system, a transfer system, and a curing system, wherein materials flow between the operating system and the curing system via the transfer system; the operating system includes a conveying system, a material placing system, and a vibration system;

[0006] The conveying system includes a front-end chain conveying system, an end-end chain conveying system, and a stepping conveying system. The front-end chain conveying system and the end-end chain conveying system have the same structure. The stepping conveying system is staggered with the front-end chain conveying system and the end-end chain conveying system in the conveying direction.

[0007] The stepping conveyor system includes a lifting mechanism and a transmission bracket;

[0008] The front-end chain conveyor system and the end chain conveyor system are respectively equipped with a correction device.

[0009] The production line of this invention has a simple structure, small footprint, low investment, and flexible production. It adopts complete supporting equipment and has a high degree of automation, which improves the production capacity and efficiency of the production line and effectively reduces the labor intensity of personnel. The stepping conveyor system can accurately and automatically transport materials between each workstation according to the production rhythm. The correction device can effectively monitor the position and status of the mold on the conveyor line and adjust it in time to ensure the accuracy of the mold position, thus ensuring the mold assembly line operation process.

[0010] In a preferred embodiment, to achieve precise transport of the mold between workstations, the material includes a component mold and a base, with the component mold fixed on the base. The base containing the component mold is transported by a front-end chain conveyor system to a stepping conveyor system, which sequentially transfers the base containing the component mold between workstations, ultimately delivering it to the end chain conveyor system. The stepping conveyor system can precisely and automatically transport materials between workstations according to the production rhythm.

[0011] Preferably, to ensure the reliability and accuracy of material conveying, the correction device includes a position detection device and a correction execution device, with the position detection device communicatively connected to the correction execution device. Since there is no position limiting device between the conveying system and the material, the material will deviate during conveying. To ensure the reliability and accuracy of material conveying, the material's position needs to be corrected in a timely manner. Using a correction device can effectively monitor the position and status of the mold on the conveyor line and make timely adjustments to ensure the accuracy of the mold's position, thus guaranteeing the smooth operation of the mold production line.

[0012] In a preferred embodiment, to achieve material deviation correction, the front-end chain conveyor system and the end-end chain conveyor system each include two parallel and independently operating chain conveyor mechanisms; the position detection device is a position detection sensor; the deviation correction execution device consists of two parallel and independently operating chain conveyor mechanisms; the position detection sensor is symmetrically installed on both sides of the chain conveyor mechanism. Based on the position of the material detected by the position detection sensor, the independently operating chain conveyor mechanisms are controlled respectively, and the material position is corrected through the differential speed of the two chain conveyor mechanisms.

[0013] In a preferred embodiment, to improve the casting quality of the product, the material placing system and the vibration system are located at the same position on the stepping conveyor system, with a casting machine positioned above the material placing system; the vibration system has a vibration mechanism installed at its bottom and mold clamping devices installed on both sides. Performing vibration compaction simultaneously with casting effectively improves product quality and prevents incomplete casting during the process.

[0014] In a preferred embodiment, to further enhance the flexibility of production line layout, the shuttle system is a forklift shuttle system including shuttle forklifts, which transport materials back and forth between the operating system and the curing system. By using shuttle forklifts for material transport, the curing chamber and the operating lines can be located in different workshops, while multiple operating lines can simultaneously share a single curing chamber, making the production line layout more flexible.

[0015] Preferably, to further improve the automation level of the production line, the transfer system is a track transfer system including a transfer stacking track, a transfer kiln inlet / outlet track, and a transfer destacking track. The transfer stacking track is located between the tail end of the end chain conveyor system and the starting end of the transfer kiln inlet / outlet track. The transfer kiln inlet / outlet track is arranged along the curing system's layout direction, and the transfer destacking track is located between the end of the transfer kiln inlet / outlet track and the front end of the front chain conveyor system. The track transfer system enables automated circulation of the production line, improving its automation level.

[0016] In a preferred embodiment, to save energy and improve the quality of component molding, the curing system includes at least two independent sub-curing chambers. Each sub-curing chamber comprises multiple independent sub-curing chambers, each with its own door and independent control, employing an automatic temperature and humidity control system. Independent curing control in each sub-curing chamber results in minimal temperature differences and high component molding quality. The number of sub-curing chambers used is determined by the number of precast concrete components to be cured, saving steam. In contrast, existing technologies often use a single, continuous curing chamber with unified control, causing the entire curing kiln to be ventilated, thus failing to achieve energy conservation and consumption reduction.

[0017] In a preferred embodiment, to improve the installation accuracy of the production line, a U-shaped prefabricated component is buried below the ground surface beneath the conveying system. The opening of the U-shaped prefabricated component faces upward, and the conveying system is fixedly installed at the bottom of the U-shape inside the prefabricated component. The U-shaped prefabricated component ensures a flat foundation pit, thereby improving the installation accuracy of the production line.

[0018] In a preferred embodiment, to improve the adaptability of the production line, the prefabricated components are assembled from prefabricated individual components with the same cross-section; the assembly connection method of the prefabricated individual components can adjust the layout of the production line according to the site conditions, thereby improving the installation adaptability of the production line.

[0019] In a preferred embodiment, to improve the reliability of the connection between prefabricated units, a U-shaped sealing groove is provided at the end of each prefabricated unit. The U-shaped sealing groove is located at the connection between adjacent prefabricated units, and a sealing strip is provided inside the U-shaped sealing groove. Providing a sealing strip between prefabricated units can prevent foreign objects from being trapped at the connection point and affecting the reliability of the connection between the prefabricated units.

[0020] Beneficial effects: The production line of this invention has a simple structure, small footprint, low investment, and flexible production; it adopts complete supporting equipment and has a high degree of automation, improving the production capacity and efficiency of the production line and effectively reducing the labor intensity of personnel; the stepping conveyor system can accurately and automatically transport materials between each workstation according to the production rhythm; the casting station uses a special casting machine, which can improve casting efficiency; the vibration station uses a special vibration equipment to perform vibration operation while casting, which can effectively improve product quality; the U-shaped prefabricated parts ensure the flatness of the foundation pit and improve the installation accuracy of the production line; it can effectively increase the variety of products produced by the production line, and can produce small and medium-sized components within the specified range, improving the applicability of the production line; the use of the correction device can effectively monitor the position and status of the mold on the conveyor line and adjust it in time to ensure the accuracy of the mold position, ensuring the mold assembly line operation process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a layout diagram of the production line according to the first embodiment of the present invention;

[0023] Figure 2 This is a layout diagram of the production line according to the second embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the stepping conveyor system of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the correction device of the present invention;

[0026] Figure 5 This is a schematic diagram of the stepping conveyor system of the present invention installed inside a U-shaped prefabricated component;

[0027] Figure 6 This is a schematic diagram of the U-shaped prefabricated component connection structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure at the end of the preform unit of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the pouring and vibration station of the present invention;

[0030] Figure 9 This is a schematic diagram of the cross-section of the vibration station of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example 1

[0034] like Figure 1 and 3 As shown, a precast concrete component production line includes an operation system 1, a transfer system 2, and a curing system 3, wherein materials flow between the operation system 1 and the curing system 3 via the transfer system 2; characterized in that: the operation system 1 includes a conveying system 11, a material placing system 12, and a vibration system 13;

[0035] The conveying system 11 includes a front-end chain conveying system 111, an end-end chain conveying system 112, and a stepping conveying system 113. The front-end chain conveying system 111 and the end-end chain conveying system 112 have the same structure. The stepping conveying system 113 is alternately connected to the front-end chain conveying system 111 and the end-end chain conveying system 112 in the conveying direction.

[0036] The stepping conveyor system 113 includes a lifting mechanism 1131 and a transmission bracket 1132;

[0037] The front-end chain conveyor system 111 and the end chain conveyor system 112 are respectively equipped with a correction device 14.

[0038] The production line of this invention has a simple structure, small footprint, low investment, and flexible production; it adopts complete supporting equipment and has a high degree of automation, which improves the production capacity and efficiency of the production line and effectively reduces the labor intensity of personnel; the stepping conveyor system 113 can accurately and automatically transport materials between each workstation according to the production rhythm; the correction device 14 can effectively monitor the position and status of materials on the conveyor line and make timely adjustments to ensure the accuracy of the mold position, thus ensuring the material assembly line operation process.

[0039] To further improve the automation level of the production line, the transfer system 2 is a track transfer system including a transfer stacking track 21, a transfer kiln in / out track 22, and a transfer destacking track 23. The transfer stacking track 21 is located between the tail end of the end chain conveyor system 112 and the starting end of the transfer kiln in / out track 22. The transfer kiln in / out track 22 is arranged along the layout direction of the curing system 3. The transfer destacking track 23 is located between the end of the transfer kiln in / out track 22 and the front end of the front chain conveyor system 111. The track transfer system enables automated circulation of the production line, improving its automation level.

[0040] To save energy and improve the quality of component molding, the curing system 3 includes at least two independent sub-curing chambers. The curing system 3 comprises multiple independent sub-curing chambers, each with its own door and independent control, employing an automatic temperature and humidity control system. Each sub-curing chamber is independently controlled, resulting in small temperature differences and good component molding quality. The number of sub-curing chambers used is determined by the number of precast concrete components to be cured, saving steam. In contrast, existing technologies often use a single, continuous curing chamber with unified control, causing the entire curing kiln to be ventilated, thus failing to utilize energy conservation and consumption reduction.

[0041] like Figure 3 As shown, to achieve precise material transport between workstations, the material includes a component mold 6 and a base tray 5, with the component mold 6 fixed on the base tray 5. The base tray 5 containing the component mold 6 is transported by a front-end chain conveyor system 111 to a stepping conveyor system 113. The stepping conveyor system 113 sequentially transfers the base tray 5 containing the component mold 6 between each workstation, ultimately delivering it to the end chain conveyor system 112. The stepping conveyor system 113 can precisely and automatically transport materials between workstations according to the production rhythm.

[0042] like Figure 4As shown, to ensure the reliability and accuracy of material conveying, the correction device 14 includes a position detection device 141 and a correction execution device 142, with the position detection device 141 and the correction execution device 142 communicatively connected. Since there is no position limiting device between the conveying system and the material, the material will deviate during conveying. To ensure the reliability and accuracy of material conveying, the material's position needs to be corrected in a timely manner. Using the correction device 14, the position and status of the mold on the conveyor line can be effectively monitored, and timely adjustments can be made to ensure the accuracy of the mold's position, thus guaranteeing the smooth operation of the mold production line.

[0043] To achieve material deviation correction, the front-end chain conveyor system 111 and the end-end chain conveyor system 112 each include two parallel and independently operating chain conveyor mechanisms; the position detection device 141 is a position detection sensor; the deviation correction execution device 142 consists of two parallel and independently operating chain conveyor mechanisms; the position detection sensor is symmetrically installed on both sides of the chain conveyor mechanism. Based on the position of the material detected by the position detection sensor, the independently operating chain conveyor mechanisms are controlled respectively, and the material position is corrected through the differential speed of the two chain conveyor mechanisms.

[0044] The correction principle of the correction device 14: When material enters the input side of the conveying system, the lifting mechanism 1131 of the stepping conveyor system 113 drives the transmission bracket 1132 to descend. The material falls onto the two parallel and independently operating chain conveyor mechanisms of the front-end chain conveyor system 111 or the end chain conveyor system 112. At this time, the independently operating chain conveyor mechanisms run simultaneously, conveying the material towards the output side of the front-end chain conveyor system 111 or the end chain conveyor system 112. When either of the position detection devices 141 on both sides detects material, the chain conveyor mechanism on the corresponding side stops running, while the chain conveyor mechanism on the other side continues to run, driving the material to continue forward until the position detection device 141 on the other side detects material, at which point the chain conveyor mechanism on that side stops running; thus achieving the purpose of automatic material correction. Then, the front-end chain conveyor system 111 or the end chain conveyor system 112 continues to convey the corrected material forward to the output end of the front-end chain conveyor system 111 or the end chain conveyor system 112 to enter the next workstation.

[0045] like Figure 5 As shown, to improve the installation accuracy of the work line, a U-shaped prefabricated component 4 is buried below the ground surface under the conveying system 11. The U-shaped prefabricated component 4 has its opening facing upwards, and the stepping conveyor system 113 is fixedly installed at the bottom of the U-shape inside the prefabricated component 4. The U-shaped prefabricated component 4 ensures the flatness of the foundation pit and improves the installation accuracy of the work line.

[0046] like Figure 6As shown, to improve the adaptability of production line 1, the prefabricated component 4 is assembled from prefabricated individual components 41 with the same cross-section. This assembly-connection method of the prefabricated individual components 41 allows for adjustments to the layout of production line 1 based on site conditions, thus improving the installation adaptability of production line 1.

[0047] like Figure 7 As shown, to improve the reliability of the connection between prefabricated units, a U-shaped sealing groove 42 is provided at the end of each prefabricated unit 41. The U-shaped sealing groove 42 is located at the connection between adjacent prefabricated units 41, and a sealing strip is provided inside the U-shaped sealing groove 42. Providing a sealing strip between the prefabricated units 41 can prevent foreign objects from being trapped at the connection point and affecting the reliability of the connection between the prefabricated units 41.

[0048] like Figure 8 and 9 As shown, in order to improve the casting quality of the product, the casting station 17 and the vibration station 18 are located at the same position in the stepping conveyor system 113. A casting machine 7 is provided above the casting station 17; and vibration mechanisms 8 are provided on both sides of the vibration station 18. Performing vibration operation at the same time as casting can effectively improve the product quality and avoid the occurrence of incomplete casting during the casting process. Example 2

[0049] like Figure 2 and 3 As shown, a precast concrete component production line includes an operation system 1, a transfer system 2, and a curing system 3, wherein materials flow between the operation system 1 and the curing system 3 via the transfer system 2; characterized in that: the operation system 1 includes a conveying system 11, a material placing system 12, and a vibration system 13;

[0050] The conveying system 11 includes a front-end chain conveying system 111, an end-end chain conveying system 112, and a stepping conveying system 113. The front-end chain conveying system 111 and the end-end chain conveying system 112 have the same structure. The stepping conveying system 113 is alternately connected to the front-end chain conveying system 111 and the end-end chain conveying system 112 in the conveying direction.

[0051] The stepping conveyor system 113 includes a lifting mechanism 1131 and a transmission bracket 1132;

[0052] The front-end chain conveyor system 111 and the end chain conveyor system 112 are respectively equipped with a correction device 14.

[0053] The production line of this invention has a simple structure, small footprint, low investment, and flexible production; it adopts complete supporting equipment and has a high degree of automation, which improves the production capacity and efficiency of the production line and effectively reduces the labor intensity of personnel; the stepping conveyor system 113 can accurately and automatically transport materials between each workstation according to the production rhythm; the correction device 14 can effectively monitor the position and status of materials on the conveyor line and make timely adjustments to ensure the accuracy of the mold position, thus ensuring the material assembly line operation process.

[0054] To further enhance the flexibility of production line layout, the shuttle system 2 is a forklift shuttle system including a shuttle forklift 24, which transports materials back and forth between the operating system 1 and the curing system 3. By using the shuttle forklift for material transport, the curing chamber and the operating lines can be located in different workshops, or multiple operating lines can share a single curing chamber, making the production line layout more flexible.

[0055] To save energy and improve the quality of component molding, the curing system 3 includes at least two independent sub-curing chambers. The curing system 3 comprises multiple independent sub-curing chambers, each with its own door and independent control, employing an automatic temperature and humidity control system. Each sub-curing chamber is independently controlled, resulting in small temperature differences and good component molding quality. The number of sub-curing chambers used is determined by the number of precast concrete components to be cured, saving steam. In contrast, existing technologies often use a single, continuous curing chamber with unified control, causing the entire curing kiln to be ventilated, thus failing to utilize energy conservation and consumption reduction.

[0056] like Figure 3 As shown, to achieve precise material transport between workstations, the material includes a component mold 6 and a base tray 5, with the component mold 6 fixed on the base tray 5. The base tray 5 containing the component mold 6 is transported by a front-end chain conveyor system 111 to a stepping conveyor system 113. The stepping conveyor system 113 sequentially transfers the base tray 5 containing the component mold 6 between each workstation, ultimately delivering it to the end chain conveyor system 112. The stepping conveyor system 113 can precisely and automatically transport materials between workstations according to the production rhythm.

[0057] like Figure 4 As shown, to ensure the reliability and accuracy of material conveying, the correction device 14 includes a position detection device 141 and a correction execution device 142, with the position detection device 141 and the correction execution device 142 communicatively connected. Since there is no position limiting device between the conveying system and the material, the material will deviate during conveying. To ensure the reliability and accuracy of material conveying, the material's position needs to be corrected in a timely manner. Using the correction device 14, the position and status of the mold on the conveyor line can be effectively monitored, and timely adjustments can be made to ensure the accuracy of the mold's position, thus guaranteeing the smooth operation of the mold production line.

[0058] To achieve material deviation correction, the front-end chain conveyor system 111 and the end-end chain conveyor system 112 each include two parallel and independently operating chain conveyor mechanisms; the position detection device 141 is a position detection sensor; the deviation correction execution device 142 consists of two parallel and independently operating chain conveyor mechanisms; the position detection sensor is symmetrically installed on both sides of the chain conveyor mechanism. Based on the position of the material detected by the position detection sensor, the independently operating chain conveyor mechanisms are controlled respectively, and the material position is corrected through the differential speed of the two chain conveyor mechanisms.

[0059] like Figure 5 As shown, to improve the installation accuracy of the work line, a U-shaped prefabricated component 4 is buried below the ground surface under the conveying system 11. The U-shaped prefabricated component 4 has its opening facing upwards, and the stepping conveyor system 113 is fixedly installed at the bottom of the U-shape inside the prefabricated component 4. The U-shaped prefabricated component 4 ensures a flat foundation pit and improves the installation accuracy of the work line.

[0060] like Figure 6 As shown, to improve the adaptability of production line 1, the prefabricated component 4 is assembled from prefabricated individual components 41 with the same cross-section. This assembly-connection method of the prefabricated individual components 41 allows for adjustments to the layout of production line 1 based on site conditions, thus improving the installation adaptability of production line 1.

[0061] like Figure 7 As shown, to improve the reliability of the connection between prefabricated units, a U-shaped sealing groove 42 is provided at the end of each prefabricated unit 41. The U-shaped sealing groove 42 is located at the connection between adjacent prefabricated units 41, and a sealing strip is provided inside the U-shaped sealing groove 42. Providing a sealing strip between the prefabricated units 41 can prevent foreign objects from being trapped at the connection point and affecting the reliability of the connection between the prefabricated units 41.

[0062] like Figure 8 and 9 As shown, in order to improve the casting quality of the product, the casting station 17 and the vibration station 18 are located at the same position in the stepping conveyor system 113. A casting machine 7 is provided above the casting station 17; and vibration mechanisms 8 are provided on both sides of the vibration station 18. Performing vibration operation at the same time as casting can effectively improve the product quality and avoid the occurrence of incomplete casting during the casting process.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A concrete precast element production line comprising a work system (1), a transfer system (2) and a curing system (3), material being transferred between the work system (1) and the curing system (3) by means of the transfer system (2); characterized in that: The job system (1) comprises a conveying system (11), a distributing system (12), and a vibrating system (13); The conveying system (11) comprises a front-end chain conveying system (111), a tail-end chain conveying system (112), and a step conveying system (113), the front-end chain conveying system (111) and the tail-end chain conveying system (112) are identical in structure; the step conveying system (113) is connected with the front-end chain conveying system (111) and the tail-end chain conveying system (112) in the conveying direction respectively. The step conveying system (113) comprises a lifting mechanism (1131) and a transmission bracket (1132). The front-end chain conveying system (111) and the tail-end chain conveying system (112) are respectively provided with a deviation rectifying device (14). The material comprises a component mold (6) and a base support (5), the component mold (6) is fixed on the base support (5). The base support (5) provided with the component mold (6) is conveyed by the front-end chain conveying system (111) to the step conveying system (113), the step conveying system (113) sequentially transfers the base support (5) provided with the component mold (6) between the work stations, and finally conveys to the tail-end chain conveying system (112).

2. A concrete preform production line according to claim 1, characterized in that: The deviation rectifying device (14) comprises a position detecting device (141) and a deviation rectifying executing device (142), the position detecting device (141) is communicatively connected with the deviation rectifying executing device (142).

3. A concrete preform production line according to claim 2, characterized in that: The front-end chain conveying system (111) and the tail-end chain conveying system (112) respectively comprise two parallel and independently operated chain conveying mechanisms; the position detecting device (141) is a position detecting sensor; the deviation rectifying executing device (142) is two parallel and independently operated chain conveying mechanisms; the position detecting sensor is symmetrically installed on both sides of the chain conveying mechanism.

4. The concrete preform production line according to claim 1, characterized in that: The distributing system (12) and the vibrating system (13) are at the same position of the step conveying system (113), a pouring machine (7) is arranged above the distributing system (12); a vibrating mechanism (8) is installed at the bottom of the vibrating system (13).

5. The concrete preform production line according to claim 1, characterized in that: The transfer system (2) is a forklift transfer system comprising a transfer forklift (24), the transfer forklift (24) transports the material between the job system (1) and the curing system (3).

6. The concrete preform production line of claim 1, wherein: The transfer system (2) is a track transfer system comprising a transfer stacking track (21), a transfer in-out kiln track (22), and a transfer unstacking track (23), the transfer stacking track (21) is located between the tail end of the tail-end chain conveying system (112) and the starting end of the transfer in-out kiln track (22), the transfer in-out kiln track (22) is arranged along the arrangement direction of the curing system (3), and the transfer unstacking track (23) is located between the end of the transfer in-out kiln track (22) and the front end of the front-end chain conveying system (111).

7. The concrete preform production line according to claim 1, characterized in that: The curing system (3) comprises at least two independent sub-steam curing chambers.

8. The concrete preform production line of claim 1, wherein: The prefabricated part (4) with U-shaped cross section is buried below the ground surface below the conveying system (11), the U-shaped prefabricated part (4) is upwardly open, and the conveying system (11) is fixedly installed at the bottom of the U-shaped inner side of the prefabricated part (4).

9. A concrete preform production line according to claim 8, characterized in that: The prefabricated part (4) is formed by assembling the prefabricated part monomers (41) with the same cross section; the end of the prefabricated part monomer is provided with a U-shaped sealing groove (42), the U-shaped sealing groove (42) is located at the connection of the adjacent prefabricated part monomers (41), and a sealing strip is arranged in the U-shaped sealing groove (42).

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