Road precast beam longitudinal bar positioning and pressing device and method

Abstract

The invention relates to the technical field of building component production equipment, and provides a highway precast beam longitudinal bar positioning and pressing device and method.The device comprises a plurality of execution modules arranged in the length direction of a longitudinal bar, and each module is provided with a mounting base and at least one execution unit. The execution unit comprises a linear driving mechanism, a lifting platform, a rotary driving mechanism and a pressing push rod, the push rod is switched between the avoiding position and the pressing preparation position through the rotary driving mechanism, and the linear driving mechanism drives the push rod to apply pressing force to the first layer of longitudinal bars and the second layer of longitudinal bars, so that the first layer of longitudinal bars and the second layer of longitudinal bars are tightly attached to the corresponding ends of the stirrups. According to the method, accurate positioning and stable pressing of the longitudinal bars are achieved through the steps of avoiding, inserting, rotating preparation and cooperative pressing. Deformation and positioning deviation caused by self weight of the long longitudinal bars are effectively overcome, and the assembling quality of the precast beam steel reinforcement framework is guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of building component production equipment, specifically relating to a positioning and clamping device and method for longitudinal reinforcement of precast highway beams. Background Technology

[0002] As a core load-bearing component in prefabricated buildings, the manufacturing quality of precast beams directly affects the safety of the overall structure. In the automated production process of precast beams, the steel reinforcement skeleton of the precast beam includes multiple three-in-one stirrup units distributed longitudinally, and multiple longitudinal bars interspersed within these units. The longitudinal bars include web longitudinal bars and bottom slab longitudinal bars. Each three-in-one stirrup unit comprises one bottom slab stirrup and two web stirrups, all U-shaped and located in the same vertical plane. The two web stirrups correspond to the two sides of the precast beam's web, and their lower ends are tied or welded to the two ends of the bottom slab stirrup, respectively. The three-in-one stirrup unit can be referenced as the integral structure composed of bottom slab reinforcement component 1 and web reinforcement component 3 in patent publication number CN116921587A. The automated production process of precast box girders can refer to the mobile automated production method and equipment for the steel reinforcement cage of highway precast box girders published in CN118848314A. In particular, the stirrups 60 in that document, including the bottom plate stirrups 61 and web plate stirrups 62, are the three-in-one stirrup unit described in this paper. However, assembling and positioning the long bottom plate longitudinal bars with the three-in-one stirrup unit presents significant difficulties. Due to the length and weight of the bottom plate longitudinal bars, problems such as rear-end dragging and misalignment are easily encountered during automated feeding and insertion, leading to deviations in the preset weld point positions between the bottom plate longitudinal bars and the bottom plate stirrups of the three-in-one stirrup unit. This deviation prevents the welding robot from accurately identifying and positioning the weld points, severely affecting the robot's operating efficiency and reliability. It often requires extensive manual intervention for correction, resulting in unstable product quality, low production efficiency, and an inability to meet the requirements of modern smart factories for automated, intelligent, and high-quality production.

[0003] Therefore, there is an urgent need in this field for a device that can automatically and accurately position and clamp longitudinal ribs before the welding process, so as to create a stable and reliable working environment for welding robots. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a positioning and clamping device and method for longitudinal reinforcement of precast highway beams. This device can automatically and accurately position and clamp the upper and lower layers of longitudinal reinforcement of precast beams to ensure that the longitudinal reinforcement and stirrups are tightly fitted together, providing stable and precise weld point positions for subsequent robotic welding, thereby improving production efficiency and product quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention proposes a positioning and clamping device for longitudinal reinforcement of a precast highway beam. The longitudinal reinforcement of the precast highway beam includes a first layer of longitudinal reinforcement and a second layer of longitudinal reinforcement. The precast highway beam also includes a plurality of stirrups arranged along its length. A portion of the first layer of longitudinal reinforcement is pre-agreed against a first end of a stirrup, and a portion of the second layer of longitudinal reinforcement is pre-agreed against a second end of a stirrup. The positioning and clamping device includes at least two execution modules arranged along the length of the longitudinal reinforcement of the precast highway beam. Each execution module includes a mounting base and at least one execution unit mounted thereon. The execution unit includes: A linear drive mechanism, which is fixed to the mounting base; The lifting platform is connected to the output end of the linear drive mechanism; A rotary drive mechanism is mounted on the lifting platform; and At least one pressing push rod is connected to the output end of the rotary drive mechanism via a rotary transmission mechanism; the rotary drive mechanism can drive the pressing push rod to rotate between a clearance position and a pressing preparation position; the linear drive mechanism can drive the pressing push rod in the clearance position or the pressing preparation position to make linear motion, so as to apply force to the first layer of longitudinal ribs and the second layer of longitudinal ribs, so as to press them against the target component.

[0006] Furthermore, each of the execution modules has two execution units arranged side by side on its mounting base along the transverse distribution direction of the longitudinal reinforcement of the precast highway beam.

[0007] Two execution units are arranged side-by-side on the mounting base of each execution module, along the transverse distribution direction of the longitudinal ribs. This layout significantly increases the density of clamping points and enhances the constraint effect on multiple parallel longitudinal ribs. The two execution units can be controlled independently to achieve precise clamping of longitudinal ribs at different positions, improving the system's flexibility and adaptability. This compact layout reduces the equipment footprint and improves the space utilization of the production line.

[0008] Furthermore, each of the execution units is provided with two clamping push rods, which are fixedly connected to the rotary transmission mechanism in a straight line along their own axis.

[0009] Each execution unit is equipped with two clamping push rods arranged in a straight line, which allows a single action of a single execution unit to act on two adjacent longitudinal ribs simultaneously, improving clamping efficiency. The straight line layout allows the clamping push rods to pass smoothly through the gaps between the longitudinal ribs during rotation, avoiding interference with adjacent longitudinal ribs. The two clamping push rods work together to provide more stable support for the longitudinal ribs, preventing deflection or slippage during the clamping process.

[0010] Furthermore, a guide bracket for guiding is provided between the linear drive mechanism and the lifting platform.

[0011] The guide bracket ensures that the lifting platform maintains a strictly straight trajectory during movement, avoiding skewness caused by lateral forces; it improves the rigidity and stability of the entire system, enabling it to withstand the reaction force generated during the clamping process; it extends the service life of the linear drive mechanism and reduces wear caused by off-center loading.

[0012] Further, the rotary transmission mechanism includes a rotary rod, a rotary fixing block, and a push rod locking block; the pressing push rod is connected to the push rod locking block; the push rod locking block is connected to the rotary rod and rotatably mounted on the rotary fixing block; the rotary rod is connected to the output shaft of the rotary drive mechanism.

[0013] The rotating fixing block provides stable support for the rotating rod, effectively suppressing vibration and jumping during rotation; the push rod locking block enables quick installation and precise adjustment of the pressing push rod, facilitating maintenance and replacement.

[0014] Furthermore, the rotary transmission mechanism also includes a mounting plate on which the rotary drive mechanism and the rotary fixing block are mounted, and the mounting plate is also connected to the linear drive mechanism.

[0015] Secondly, the present invention also proposes a method for positioning and clamping the longitudinal reinforcement of precast highway beams, which is implemented using the aforementioned clamping device. The method includes the following steps: S1: Initial avoidance step: Control the rotation drive mechanism of each execution module to drive the clamping push rod to rotate from the initial position to one end of the avoidance position between two adjacent first layer longitudinal ribs or between two adjacent second layer longitudinal ribs; wherein, the existing equipment in the upstream process has pre-agreed the first layer longitudinal ribs to the first end of the target component and pre-agreed the second layer longitudinal ribs to the second end of the target component. S2: Interleaving step: Control the linear drive mechanism to drive the lifting platform and the pressing push rod to move, so that the pressing push rod enters the other end of the clearance position between the first layer longitudinal rib and the second layer longitudinal rib without interference from one end of the clearance position; S3: Rotation preparation step: Control the rotation drive mechanism to drive the clamping push rod to rotate to the clamping preparation position. At this time, the angle between the axis of the clamping push rod and the extension direction of the first layer longitudinal rib or the second layer longitudinal rib on the horizontal projection plane is less than or equal to 90 degrees. S4: Cooperative clamping step: Control the linear drive mechanism of each execution module to drive the clamping push rod in the clamping preparation position to move linearly; among them, a part of the clamping push rod moves along the first direction to push or pull the first layer of longitudinal ribs to clamp the first end of the target component; another part of the clamping push rod moves along the second direction to push or pull the second layer of longitudinal ribs to clamp the second end of the target component.

[0016] Furthermore, the coordinated pressing step further includes an alternating coordinated pressing step: The system controls each execution module that is laterally distributed along the longitudinal reinforcement of the precast beam of the highway, so that its clamping push rod rotates to the clamping preparation position in stages or batches; it controls the linear drive mechanism of each execution module to drive the clamping push rod in the clamping preparation position to move linearly in stages or batches, so that the clamping push rods moving along the first direction and moving along the second direction are alternately distributed; thus realizing the synchronous and alternating clamping of multiple first layer longitudinal reinforcements and first layer longitudinal reinforcements.

[0017] The alternating coordinated clamping step, controlled in a time-sharing or batch-based manner, achieves the alternating distribution and movement of the clamping push rods. This avoids interference problems that may occur if all clamping push rods move simultaneously; it also enables the synchronous alternating clamping of multiple first-layer longitudinal ribs and multiple second-layer longitudinal ribs, improving the uniformity of clamping and making it more efficient.

[0018] Furthermore, the method further includes the step of: S5: Reset support step: Weld and fix the first layer of longitudinal ribs to the first end of the target component; and weld and fix the second layer of longitudinal ribs to the second end of the target component; control the linear drive mechanism to drive the lifting platform and the pressing push rod to move, and control the rotary drive mechanism to drive the pressing push rod to rotate, so that the pressing push rod retracts to the initial position and supports the first layer of longitudinal ribs or the second layer of longitudinal ribs.

[0019] The support provided by the clamping push rod after welding prevents deformation of the weld heat-affected zone during cooling; it provides a stable cooling environment for the welded area to ensure welding quality; and it enables automatic reset of the device, preparing it for the next work cycle.

[0020] Furthermore, the target component includes stirrups, and the stirrups include a three-in-one stirrup unit; the three-in-one stirrup unit includes a bottom plate stirrup; the first end of the target component includes the upper end of the bottom plate stirrup; the second end of the target component includes the lower end of the bottom plate stirrup.

[0021] Furthermore, the three-in-one stirrup unit also includes web stirrups; one end of the web stirrups is connected to the bottom plate stirrups; the first end and the second end of the target component are respectively the opposite ends of the web stirrups.

[0022] The beneficial effects of this invention are as follows: By arranging at least two execution modules along the length of the longitudinal reinforcement, this layout can simultaneously apply clamping force to different parts of the long longitudinal reinforcement, effectively overcoming the bending deformation problem caused by the self-weight and stiffness of the reinforcement. This ensures that the entire longitudinal reinforcement can be smoothly and evenly clamped onto the stirrups, avoiding localized stress concentration or incomplete clamping that may occur with single-point clamping; it provides a stable operating foundation for the welding robot, significantly improving the reliability and consistency of welding quality; and its modular design allows the system to adapt to the production of precast beams of different lengths, exhibiting good scalability and adaptability.

[0023] The method of this invention achieves automated clamping operations through a standardized process of avoidance, insertion, rotation, and clamping. The design of the avoidance position ensures that the clamping push rod does not interfere with the arrangement of the longitudinal ribs in the initial stage; the insertion step allows the push rod to accurately enter the working area; the rotation preparation realizes the transition of the push rod from the avoidance state to the working state; and the coordinated clamping realizes the synchronous positioning of the first and second layers of longitudinal ribs, greatly improving work efficiency and quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing a deviation between the preset weld points of the bottom plate longitudinal reinforcement and the bottom plate stirrups in the three-in-one stirrup unit described in the background art of this invention.

[0025] Figure 2 This is a schematic diagram of the execution module of the precast highway beam longitudinal reinforcement positioning and clamping device of the present invention.

[0026] Figure 3 This is a schematic diagram of the pressing method of the present invention.

[0027] Figure 4 This is a top view of the structure in which the pressing push rod is located in the avoidance position during the interleaving step of the method of the present invention.

[0028] Figure 5 This is a top view of the structure in the collaborative pressing step of the method of the present invention, in which multiple pressing push rods press against the first and second ends of the target component respectively.

[0029] Figure 6 This is a schematic diagram of the structure after the first layer of longitudinal bars and the second layer of longitudinal bars are pressed tightly against the stirrups of the bottom plate according to the method of the present invention.

[0030] In the diagram: 1-Mounting base; 2-Electric cylinder mounting plate; 3-Electric cylinder mounting seat; 4-Servo electric cylinder; 5-Guide bracket; 6-Mounting plate; 7-Rotary drive mechanism; 8-Rotating rod; 9-Rotary fixing block; 10-Push rod locking block; 11-Pressure push rod; 20-Execution module; 30-Longitudinal reinforcement of precast highway beam; 31-First layer longitudinal reinforcement; 32-Second layer longitudinal reinforcement; 40-Bottom plate stirrups; 50-Web plate stirrups. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The three-in-one stirrup unit includes a bottom plate stirrup 40 and two web plate stirrups 50 connected to both sides of the bottom plate stirrup 40. The steel reinforcement skeleton of the precast highway beam includes multiple three-in-one stirrup units distributed along the length of the precast beam and longitudinal reinforcement 30 of the precast highway beam inserted within the three-in-one stirrup units. The longitudinal reinforcement 30 of the precast highway beam includes a first layer of longitudinal reinforcement 31 and a second layer of longitudinal reinforcement 32, which are respectively connected to the opposite ends of the bottom plate stirrup 40 or the opposite ends of the web plate stirrups 50. Due to the long length and heavy weight of the longitudinal reinforcement 30 of the precast highway beam, problems such as rear-end dragging and misalignment are prone to occur during automated feeding and insertion, resulting in deviations in the preset weld point positions between the longitudinal reinforcement 30 of the precast highway beam and the bottom plate stirrup 40 or web plate stirrups 50. This deviation makes it impossible for the welding robot to accurately identify and position the weld point, seriously affecting the working efficiency and reliability of the welding robot. In this embodiment, the cooperation between the longitudinal reinforcement 30 of the precast highway beam and the bottom plate stirrup 40 is taken as an example. Figure 1 As shown, in the precast highway beam longitudinal reinforcement 30 of the present invention, the first layer of longitudinal reinforcement 31 is located above the second layer of longitudinal reinforcement 32. The first layer of longitudinal reinforcement 31 is used to press against the upper end of the bottom plate stirrups 40, and the second layer of longitudinal reinforcement 32 is used to press against the lower end of the bottom plate stirrups 40. However, due to the lack of effective support below the first layer of longitudinal reinforcement 31, some positions of the first layer of longitudinal reinforcement 31 are not tightly attached to the upper end of the bottom plate stirrups 40, resulting in positional deviation and affecting welding efficiency and quality.

[0033] The clamping device and method of the present invention are designed to solve this problem by clamping the first layer of longitudinal reinforcement 31 to the upper end of the bottom plate stirrup 40. Simultaneously, the second layer of longitudinal reinforcement 32 can also be clamped to the lower end of the bottom plate stirrup 40. Furthermore, it should be noted that the clamping device of the present invention does not necessarily clamp the first layer of longitudinal reinforcement 31 to the upper end of the bottom plate stirrup 40; it can also simply tighten the first layer of longitudinal reinforcement 31 at the upper end of the bottom plate stirrup 40. Similarly, the second layer of longitudinal reinforcement 32 does not necessarily have to be clamped to the lower end of the bottom plate stirrup 40; it can also be tightened at the lower end of the bottom plate stirrup 40.

[0034] Of course, the first layer of longitudinal reinforcement 31 and the second layer of longitudinal reinforcement 32 can also be steel bars that cooperate with the web stirrups 50, and the deviation problem still exists. The clamping device and method of the present invention are also applicable to clamping and fixing the first layer of longitudinal reinforcement 31 and the second layer of longitudinal reinforcement 32 at the corresponding positions of the web stirrups 50.

[0035] The target component of this invention is a three-in-one stirrup unit. When the target component is a bottom plate stirrup 40, the first end of the target component can be the upper end of the bottom plate stirrup 40, and the second end of the target component can be the lower end of the bottom plate stirrup 40. When the target component is a web plate stirrup 50, the first end and the second end of the target component are opposite ends of the web plate stirrup 50, respectively.

[0036] like Figure 2 , Figure 4 , Figure 5 As shown, the positioning and clamping device for the longitudinal reinforcement 30 of the precast highway beam of the present invention includes two execution modules 20 arranged along the length direction of the longitudinal reinforcement 30 of the precast highway beam. The two execution modules 20 form a set of execution modules, while the clamping device includes multiple sets of execution modules distributed along the width direction of the longitudinal reinforcement 30 of the precast highway beam. The attached... Figure 4 , Figure 5 Only two execution modules are shown.

[0037] Each execution module 20 includes a mounting base 1 and two execution units mounted thereon, arranged side by side along the transverse distribution direction of the longitudinal reinforcement 30 of the precast highway beam.

[0038] The execution unit includes: A linear drive mechanism, which is fixed on the mounting base 1; The lifting platform is connected to the output end of the linear drive mechanism; Rotary drive mechanism 7, mounted on the lifting platform; and Two pressing push rods 11 are connected to the output end of the rotary drive mechanism 7 through a rotary transmission mechanism. The two pressing push rods 11 are fixedly connected to the rotary transmission mechanism in a straight line along their own axis. A guide bracket 5 is installed between the linear drive mechanism and the lifting platform for guidance. The lifting platform is made of steel plate and is fixedly connected to the output end of the linear drive mechanism.

[0039] The rotary transmission mechanism includes a rotating rod 8, a rotating fixed block 9, a push rod locking block 10, and a mounting plate 6; a pressing push rod 11 is connected to the push rod locking block 10; the push rod locking block 10 is connected to the rotating rod 8 and rotatably mounted on the rotating fixed block 9; the rotating rod 8 is connected to the output shaft of the rotary drive mechanism 7. The rotary drive mechanism 7 and the rotating fixed block 9 are mounted on the mounting plate 6, and the mounting plate 6 is also connected to the linear drive mechanism.

[0040] The linear drive mechanism can be a servo electric cylinder 4 or an electric push rod. In this embodiment, a servo electric cylinder 4 is selected. The linear drive mechanism also includes an electric cylinder mounting plate 2 and an electric cylinder mounting base 3. The servo electric cylinder 4 is fixed to the mounting base 1 via the electric cylinder mounting base 3. The electric cylinder mounting plate 2 is installed on both sides of the servo electric cylinder 4, and the bottom of the electric cylinder mounting plate 2 is fixed to the mounting base 1. The servo electric cylinder 4 includes a servo motor, a lead screw, and a cylinder body. The servo motor is fixedly installed on the electric cylinder mounting base 3. A guide bracket 5 is connected to the upper end of the cylinder body. The guide bracket 5 is connected to the electric cylinder mounting plate 2. The lead screw passes through the cylinder body as the output end and connects to the lifting platform.

[0041] The rotary drive mechanism 7 is a rotary cylinder. The rotary drive mechanism 7 can drive the clamping push rod 11 to rotate between the avoidance position and the clamping preparation position; the linear drive mechanism can drive the clamping push rod 11 in the avoidance position or the clamping preparation position to make linear movement, so as to apply force to the first layer of longitudinal ribs 31 and the second layer of longitudinal ribs 32, so as to press them onto the target component.

[0042] Based on the same inventive concept, such as Figure 3 As shown, the method for positioning and clamping the longitudinal reinforcement 30 of precast highway beams proposed in this invention is implemented using the aforementioned clamping device, and the method includes the following steps: S1: Initial Avoidance Step: Control the rotation drive mechanism 7 of each execution module 20 to drive the clamping push rod 11 to rotate from the initial position to one end of its avoidance position located between two adjacent first-layer longitudinal ribs 31 or between two adjacent second-layer longitudinal ribs 32; wherein, the existing equipment in the upstream process has pre-agreed partially with the first end of the target component and partially with the second end of the target component with the second layer longitudinal rib 32. The existing equipment in the upstream process can be an existing clamp or binding strap, or it can be the execution unit of the present invention, which is installed in the upstream process or interspersed in a specific position in this process.

[0043] S2: Interleaving Step: Control the linear drive mechanism to move the lifting platform and the clamping push rod 11, so that the clamping push rod 11 enters without interference from one end of the clearance position into the other end of the clearance position located between the first layer longitudinal rib 31 and the second layer longitudinal rib 32. Position as follows: Figure 4 As shown. The avoidance position can be understood as the space between two adjacent first-layer longitudinal bars 31 or the space between two adjacent second-layer longitudinal bars 32, and the space has a certain height, including at least the space between the first-layer longitudinal bars 31 and the second-layer longitudinal bars 32 and the space opposite to each other.

[0044] S3: Rotation Preparation Step: Control the rotation drive mechanism 7 to drive the clamping push rod 11 to rotate to the clamping preparation position. At this time, the angle between the axis of the clamping push rod 11 and the extension direction of the first layer longitudinal rib 31 or the second layer longitudinal rib 32 on the horizontal projection plane is less than or equal to 90 degrees. In this embodiment, 90 degrees is preferred. That is, the axis of the clamping push rod 11 is perpendicular to the length direction of the first layer longitudinal rib 31 or the second layer longitudinal rib 32.

[0045] S4: Coordinated clamping step: Control the linear drive mechanism of each execution module 20 to drive the clamping push rod 11, which is in the clamping preparation position, to move linearly; such as Figure 5 As shown, a portion of the clamping push rods 11 of the execution units move along a first direction, pushing or pulling the first layer of longitudinal ribs 31 to press against the first end of the target component; another portion of the clamping push rods 11 of the execution units move along a second direction, pushing or pulling the second layer of longitudinal ribs 32 to press against the second end of the target component. In this embodiment, the first direction is from bottom to top, and the clamping push rods 11 of a portion of the execution units move along this direction, pushing the first layer of longitudinal ribs 31 to press against the upper end of the internal space of the bottom plate stirrups 40. In this embodiment, the second direction is from top to bottom, and the clamping push rods 11 of a portion of the execution units move along this direction, pulling the second layer of longitudinal ribs 32 to press against the lower end of the internal space of the bottom plate stirrups 40. After the first layer of longitudinal ribs 31 and the second layer of longitudinal ribs 32 are respectively pressed against the bottom plate stirrups 40, welding operations can be performed on them. The welded bottom plate stirrups 40 are as follows: Figure 6 As shown.

[0046] The coordinated clamping step also includes an alternating coordinated clamping step: The system controls the execution modules 20, which are laterally distributed along the longitudinal reinforcement 30 of the precast highway beam, to rotate their pressing push rods 11 to the pressing preparation position in stages or batches. It also controls the linear drive mechanism of each execution module 20 to drive the pressing push rods 11 in the pressing preparation position to move linearly in stages or batches, resulting in alternating distribution of pressing push rods 11 moving along the first direction and along the second direction. This achieves synchronous and alternating pressing of multiple first-layer longitudinal reinforcements 31. For example, multiple execution modules 20 of one set of execution modules move along the first direction, pressing the first-layer longitudinal reinforcement 31 to the upper end of the internal space of the bottom plate stirrup 40. Simultaneously, multiple execution modules 20 of another adjacent set of execution modules move along the second direction, pulling the second-layer longitudinal reinforcement 32 to the lower end of the internal space of the bottom plate stirrup 40. This method is more efficient than pressing the first-layer longitudinal reinforcement 31 one by one, completing the welding and fixing of the first-layer longitudinal reinforcement 31, and then pressing the second-layer longitudinal reinforcement 32.

[0047] In some embodiments, the execution modules may be alternately distributed at opposite ends of the first layer longitudinal rib 31 and the second layer longitudinal rib 32, instead of all being located below the second layer longitudinal rib 32 as shown in this embodiment. For example, some execution modules are distributed above the first layer longitudinal rib 31, with their pressing push rods 11 pressing down on the second layer longitudinal rib 32 to the lower end of the bottom plate stirrup 40, or pressing up on the first layer longitudinal rib 31 to the upper end of the bottom plate stirrup 40; other execution modules are distributed below the second layer longitudinal rib 32, with their pressing push rods 11 pressing up on the first layer longitudinal rib 31 to the upper end of the bottom plate stirrup 40, or pressing down on the second layer longitudinal rib 32 to the lower end of the bottom plate stirrup 40.

[0048] S5: Reset support step: After welding and fixing the first layer of longitudinal rib 31 to the first end of the target component; and welding and fixing the second layer of longitudinal rib 32 to the second end of the target component; control the linear drive mechanism to drive the lifting platform and the pressing push rod 11 to move, and control the rotary drive mechanism 7 to drive the pressing push rod 11 to rotate, so that the pressing push rod 11 returns to the initial position and supports the first layer of longitudinal rib 31 or the second layer of longitudinal rib 32.

[0049] In this embodiment, the first execution unit is distributed below the second layer of longitudinal reinforcement 32. When the pressing push rod 11 is in the initial position, it is supported at the lower end of the outer space of the second layer of longitudinal reinforcement 32, thereby supporting the entire longitudinal reinforcement 30 of the highway precast beam.

[0050] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A positioning and clamping device for longitudinal reinforcement of a precast highway beam, wherein the longitudinal reinforcement of the precast highway beam includes a first layer of longitudinal reinforcement and a second layer of longitudinal reinforcement; the precast highway beam further includes a plurality of stirrups arranged along its length; a portion of the first layer of longitudinal reinforcement is pre-agreed against a first end of a stirrup, and a portion of the second layer of longitudinal reinforcement is pre-agreed against a second end of a stirrup; characterized in that, The positioning and clamping device includes at least two execution modules arranged along the length of the longitudinal reinforcement of the precast highway beam; each execution module includes a mounting base and at least one execution unit mounted thereon; The execution unit includes: A linear drive mechanism, which is fixed to the mounting base; The lifting platform is connected to the output end of the linear drive mechanism; A rotary drive mechanism is mounted on the lifting platform; and At least one pressing push rod is connected to the output end of the rotary drive mechanism via a rotary transmission mechanism; the rotary drive mechanism can drive the pressing push rod to rotate between a clearance position and a pressing preparation position; the linear drive mechanism can drive the pressing push rod in the clearance position or the pressing preparation position to make linear motion, so as to apply force to the first layer of longitudinal ribs and the second layer of longitudinal ribs, so as to press them against the target component.

2. The longitudinal reinforcement positioning and clamping device for precast highway beams according to claim 1, characterized in that, Two execution units are arranged side by side on the mounting base of each execution module along the transverse distribution direction of the longitudinal reinforcement of the precast highway beam.

3. The longitudinal reinforcement positioning and clamping device for precast highway beams according to claim 2, characterized in that, Each of the execution units is provided with two clamping push rods, which are fixedly connected to the rotary transmission mechanism in a straight line along their own axis.

4. The longitudinal reinforcement positioning and clamping device for precast highway beams according to claim 1, characterized in that, A guide bracket for guiding is provided between the linear drive mechanism and the lifting platform.

5. A positioning and clamping device for longitudinal reinforcement of precast highway beams according to any one of claims 1 to 4, characterized in that, The rotary transmission mechanism includes a rotating rod, a rotating fixed block, and a push rod locking block; the pressing push rod is connected to the push rod locking block; the push rod locking block is connected to the rotating rod and rotatably mounted on the rotating fixed block; the rotating rod is connected to the output shaft of the rotary drive mechanism.

6. The longitudinal reinforcement positioning and clamping device for precast highway beams according to claim 5, characterized in that, The rotary transmission mechanism also includes a mounting plate on which the rotary drive mechanism and the rotary fixing block are mounted. The mounting plate is also connected to the linear drive mechanism.

7. A method for positioning and clamping longitudinal reinforcement bars of precast highway beams, implemented using the clamping device as described in any one of claims 1-6, characterized in that, The method includes the following steps: S1: Initial avoidance step: Control the rotation drive mechanism of each execution module to drive the clamping push rod to rotate from the initial position to one end of the avoidance position between two adjacent first layer longitudinal ribs or between two adjacent second layer longitudinal ribs; wherein, the existing equipment in the upstream process has pre-agreed the first layer longitudinal ribs to the first end of the target component and pre-agreed the second layer longitudinal ribs to the second end of the target component. S2: Interleaving step: Control the linear drive mechanism to drive the lifting platform and the pressing push rod to move, so that the pressing push rod enters the other end of the clearance position between the first layer longitudinal rib and the second layer longitudinal rib without interference from one end of the clearance position; S3: Rotation preparation step: Control the rotation drive mechanism to drive the clamping push rod to rotate to the clamping preparation position. At this time, the angle between the axis of the clamping push rod and the extension direction of the first layer longitudinal rib or the second layer longitudinal rib on the horizontal projection plane is less than or equal to 90 degrees. S4: Cooperative clamping step: Control the linear drive mechanism of each execution module to drive the clamping push rod in the clamping preparation position to move linearly; among them, a part of the clamping push rod moves along the first direction to push or pull the first layer of longitudinal ribs to clamp the first end of the target component; another part of the clamping push rod moves along the second direction to push or pull the second layer of longitudinal ribs to clamp the second end of the target component.

8. A method for positioning and tightening longitudinal reinforcement bars of precast highway beams according to claim 7, characterized in that, The coordinated pressing step further includes an alternating coordinated pressing step: The system controls each execution module that is laterally distributed along the longitudinal reinforcement of the precast beam of the highway, so that its clamping push rod rotates to the clamping preparation position in stages or batches; it controls the linear drive mechanism of each execution module to drive the clamping push rod in the clamping preparation position to move linearly in stages or batches, so that the clamping push rods moving along the first direction and moving along the second direction are alternately distributed; thus realizing the synchronous and alternating clamping of multiple first layer longitudinal reinforcements and first layer longitudinal reinforcements.

9. A method for positioning and tightening longitudinal reinforcement bars of precast highway beams according to claim 7, characterized in that, The method further includes the following steps: S5: Reset support step: Weld and fix the first layer of longitudinal ribs to the first end of the target component; and weld and fix the second layer of longitudinal ribs to the second end of the target component; control the linear drive mechanism to drive the lifting platform and the pressing push rod to move, and control the rotary drive mechanism to drive the pressing push rod to rotate, so that the pressing push rod retracts to the initial position and supports the first layer of longitudinal ribs or the second layer of longitudinal ribs.

10. A method for positioning and clamping longitudinal reinforcement bars of precast highway beams according to claim 8 or 9, characterized in that, The target component includes stirrups, and the stirrups include a three-in-one stirrup unit; the three-in-one stirrup unit includes a bottom plate stirrup; the first end of the target component includes the upper end of the bottom plate stirrup; the second end of the target component includes the lower end of the bottom plate stirrup.

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