Construction method applied to prefabricated precast concrete beam and special construction equipment therefor

Abstract

The present invention discloses a construction method and a special construction device for prefabricated concrete beams used in assembly. The method includes the following steps: The prefabricated concrete beams are uniformly and standardly manufactured by a prefabrication factory and then transferred to the predetermined position on the construction floor and stacked neatly on the cushion blocks; the special construction device is transferred to the construction floor; the lifting mechanism and the lifting support mechanism are used to lift the beam body; the movable limit plate is controlled to tighten to limit and fix the beam body, and the orientation of the special construction device is preliminarily adjusted according to the position of the cantilever on the support column; the beam body is continuously lifted to the predetermined elevation through the lifting mechanism; the calibration mechanism is used to finely adjust and correct the horizontal position and pitching angle of the beam body; the movable limit plate is controlled to relax, and the beam body is driven by the active rollers until the steel connecting piece contacts the cantilever; The present invention can achieve the rapid installation and precise adjustment of prefabricated concrete beams used in assembly, reduce the amount of tower crane operations, is beneficial to reducing the impact on the main line construction period, and improves the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and specifically, to a construction method and a dedicated construction device applied to prefabricated precast concrete beams. Background Art

[0002] A precast concrete beam is a beam that is prefabricated in a factory and then transported to the construction site for installation and fixation at the designed position. Precast concrete beams can be mass-produced. In addition, since precast beams can be fabricated in advance and meet the installation requirements at any time, the progress of the process is not affected. After the precast beams are transported to the construction site, they need to be installed on the corresponding columns.

[0003] Currently, for the installation process of precast concrete beams, generally a tower crane is used to lift the component to be installed, and through manual calibration, it is aligned with the installed column, and then the beam-column connection is realized manually. On the one hand, during the construction process, multiple workers are required to measure and command the calibration on the column surface, and the precast beam is adjusted and hoisted by operating the tower crane to meet the requirements of pre-installation positioning. The operation is too cumbersome. On the other hand, since the tower crane uses a flexible connection, the manual labor intensity is very high when positioning and adjusting to the corresponding position, and it is affected by many subjective factors of the workers, and it is not easy to control the construction quality. In addition, during the assembly process of precast concrete beams, the tower crane needs to be occupied for a long time, which greatly affects the construction progress and forces the main line construction period to be extended. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a construction method applied to prefabricated precast concrete beams. Through a calibration mechanism and a lifting mechanism, the rapid installation of prefabricated precast concrete beams is realized, the impact on the main line construction period is reduced, the construction speed is accelerated, and the mechanical cost is generally reduced; the number of construction personnel is reduced, and the labor cost is reduced; the difficulty of component positioning and adjustment is reduced, the installation accuracy is improved, which is beneficial to improving the overall quality of the building. Another purpose of the present invention is to provide a dedicated construction device based on the foregoing construction method, aiming to solve the technical problems described in the background art.

[0005] To achieve the above purpose, the present invention first discloses a technical solution:

[0006] A construction method applied to prefabricated precast concrete beams, which is characterized by including the following steps:

[0007] S1: The precast concrete beams are uniformly manufactured in a standardized manner by a precast factory and then transferred to a predetermined position on the construction floor and stacked neatly on the cushion wood;

[0008] S2: Transfer the dedicated construction device to the construction floor. The dedicated construction device includes a traveling mechanism, a lifting mechanism, a calibration mechanism and a lifting mechanism;

[0009] S3: Drive the special construction equipment to the precast concrete beam stacking area through the traveling mechanism, and lift the beam body using the lifting mechanism and the lifting support mechanism;

[0010] S4: After the beam body is lifted in place, control the movable limit plate of the lifting support mechanism to tighten and limit and fix the beam body. Then, drive the special construction equipment to the vicinity of the column position through the traveling mechanism, and preliminarily adjust the orientation of the special construction equipment according to the position of the cantilever on the column;

[0011] S5: Continuously lift the beam body to the predetermined elevation through the lifting mechanism;

[0012] S6: Use the calibration mechanism to finely adjust and correct the horizontal position and pitching angle of the beam body, so that the profiled steel connectors at the end of the beam body are aligned with the cantilevers on the column;

[0013] S7: Control the movable limit plate of the lifting support mechanism to relax, and drive the beam body to move along its length direction using the driving idler until the profiled steel connectors at the end of the beam body contact the cantilevers on the column;

[0014] S8: First, connect and fix the web plate of the profiled steel connector to the vertical plate of the cantilever through the fixing plate, and then align and weld the flange plates of the profiled steel connector with the horizontal plates of the cantilever respectively;

[0015] S9: Arrange temporary supports between the beam body and the ground;

[0016] S10: Control the lifting mechanism to lower until the lifting support mechanism is completely separated from the beam body, and the installation is completed. Then repeat S3 - S9 to install the next precast concrete beam.

[0017] Furthermore, in step S2, the special construction equipment enters the construction floor through the traveling mechanism via the construction elevator.

[0018] Furthermore, before lifting the beam body in step S3, mark the installation orientation and elevation characteristic points corresponding to the building axis on the beam body in advance. When finely adjusting and correcting the horizontal position and pitching angle of the beam body in step S6, use the laser level ray for assistance to make the laser level ray coincide with the installation orientation and elevation characteristic points on the beam body.

[0019] Based on the foregoing construction method, the present invention also discloses a special construction equipment, which is characterized in that: it includes a traveling mechanism, an elevating mechanism is arranged on the traveling mechanism, a calibration mechanism is arranged on the elevating mechanism, and a lifting mechanism is arranged on the calibration mechanism; wherein: the lifting mechanism includes a lifting plate, and a number of supporting rollers for supporting the beam body are arranged on the lifting plate, and at least part of the supporting rollers are active supporting rollers so that the position of the beam body in its length direction is adjustable. Fixed limiting plates and movable limiting plates are respectively arranged on both sides of the lifting plate, and the gap between the fixed limiting plate and the movable limiting plate can serve as a limiting space adapted to the width of the beam body.

[0020] Furthermore, all the supporting rollers are active supporting rollers, and the rotating shafts of the active supporting rollers are all connected to the output shaft of a driving motor through a worm and gear transmission assembly.

[0021] Furthermore, a number of guiding rollers for guiding the beam body to slide along its length direction are also arranged on the fixed limiting plate.

[0022] Furthermore, the movable limiting plate is hinged to the lifting plate through an ear plate, and an adjusting assembly for adjusting the rotating position of the lifting plate is also arranged between the movable limiting plate and the lifting plate.

[0023] Furthermore, the adjusting assembly includes a telescopic cylinder, the cylinder body of the telescopic cylinder is hinged to the lifting plate, and the telescopic rod of the telescopic cylinder is hinged to the movable limiting plate.

[0024] Furthermore, a number of rolling wheels that can roll on the surface of the beam body are also arranged at the end of the movable limiting plate.

[0025] Furthermore, the calibration mechanism includes an upper mounting seat and a lower mounting seat. A first servo electric cylinder is arranged between the upper mounting seat and the fixed limiting plate. The cylinder body of the first servo electric cylinder is hinged to the upper mounting seat, and the telescopic rod of the first servo electric cylinder is hinged to the fixed limiting plate; a sliding table is arranged on the lower mounting seat, a slider pushed by a second servo electric cylinder is arranged on the sliding table, and a support for supporting the lifting plate is also hinged on the slider.

[0026] Compared with the prior art, the remarkable effects of the present invention are:

[0027] 1. The construction method of the present invention can realize the rapid installation and precise adjustment of assembled precast concrete beams, reduce the amount of tower crane operation, is beneficial to reducing the impact on the main line construction period, so as to speed up the construction progress, and generally reduces the mechanical cost; at the same time, less manual participation is required during the installation operation, on the one hand, reducing the labor cost, and on the other hand, it is also beneficial to ensure the construction quality;

[0028] 2. The special construction equipment of the present invention can quickly lift the precast concrete beams pre-stacked on the construction floor through the lifting mechanism, which reduces the workload of installing the precast concrete beams, reduces the impact on the main line construction period, and improves the installation speed;

[0029] 3. The calibration mechanism can fine-tune the beam position in the horizontal direction and pitch angle. With the active rollers, the precast concrete beam can be quickly put into place without manual intervention, with low labor intensity and fast construction speed.

[0030] 4. Through the mutual cooperation of the lifting mechanism, calibration mechanism and supporting mechanism, on the one hand, the hard connection is adopted, which reduces the difficulty of adjusting the node positioning and improves the installation accuracy compared with the soft connection of the traditional tower crane, thereby improving the overall building quality. On the other hand, the installation and adjustment process is completed at one time, which is conducive to further improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0032] Figure 1 It is a schematic diagram of the process of the construction method in Example 1;

[0033] Figure 2 It is a three-dimensional diagram (I) of the special construction equipment in Example 1;

[0034] Figure 3 A three-dimensional diagram of the special construction equipment in Example 1 (II)

[0035] Figure 4 for Figure 3 A partial enlarged view of the middle A part;

[0036] Figure 5 It is a three-dimensional diagram (three) of the special construction equipment in Example 1;

[0037] Figure 6 for Figure 5 A partial enlarged view of part B in the middle;

[0038] Figure 7 It is a three-dimensional diagram (four) of the special construction equipment in Example 1;

[0039] Figure 8 for Figure 7 A partial enlarged view of the middle C part;

[0040] Figure 9 Schematic diagram of the state of the beam body when the special construction equipment is transporting the beam body in Example 1 (I);

[0041] Figure 10 Schematic diagram of the state of the beam body when the special construction equipment is transporting the beam body in Example 1 (II);

[0042] Figure 11 Schematic diagram (III) of the state when the special construction equipment transports the beam body in the first embodiment;

[0043] Figure 12 Schematic diagram (I) of the state when the special construction equipment assembles the beam body in the first embodiment;

[0044] Figure 13 Schematic diagram (II) of the state when the special construction equipment assembles the beam body in the first embodiment;

[0045] Figure 14 Schematic diagram (III) of the state when the special construction equipment assembles the beam body in the first embodiment;

[0046] Labels in the figure: 1 - traveling mechanism, 2 - lifting mechanism, 3 - calibration mechanism, 4 - lifting mechanism, 5 - beam body, 6 - support column, 401 - lifting plate, 402 - driving idler, 403 - fixed limit plate, 404 - movable limit plate, 405 - driving motor, 406 - guide roller, 407 - ear plate, 408 - telescopic cylinder, 409 - rolling wheel, 301 - upper mounting seat, 302 - lower mounting seat, 303 - first servo electric cylinder, 304 - slide table, 305 - slider, 306 - support, 307 - second servo electric cylinder, 201 - first lifting guide rail, 202 - second lifting guide rail, 203 - third lifting guide rail, 501 - profiled steel connector, 502 - cantilever bracket. Detailed implementation manner

[0047] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, in the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0049] Figures 1 to 14 An embodiment of the present invention is shown: a construction method applied to precast precast concrete beams, including the following steps:

[0050] S1: The precast concrete beams are uniformly and standardized manufactured by the precast factory and then transferred to the predetermined positions on the construction floors, and neatly stacked on the cushion blocks.

[0051] S2: Transfer the special construction equipment to the construction floor. The special construction equipment includes a traveling mechanism 1, a lifting mechanism 2, a calibration mechanism 3 and a lifting mechanism 4.

[0052] S3: Drive the special construction equipment to the stacking place of the precast concrete beams through the traveling mechanism 1, and lift the beam body 5 by using the lifting mechanism 2 and the lifting mechanism 4.

[0053] S4: After the beam body is lifted in place, control the movable limit plate 404 of the lifting mechanism 4 to tighten to limit and fix the beam body 5. Then, drive the special construction equipment to the vicinity of the position of the column 6 through the traveling mechanism 1, and preliminarily adjust the orientation of the special construction equipment according to the position of the cantilever 601 on the column 6.

[0054] S5: Continuously lift the beam body 5 to the predetermined elevation through the lifting mechanism 2.

[0055] S6: Use the calibration mechanism 3 to finely adjust and correct the horizontal position and pitching angle of the beam body 5, so that the profiled steel connecting piece 501 at the end of the beam body 5 is aligned with the cantilever 601 on the column 6.

[0056] S7: Control the movable limit plate 404 of the lifting mechanism 4 to relax, and drive the beam body 5 to move along its length direction by using the active roller 402 until the profiled steel connecting piece 501 at the end of the beam body 5 contacts the cantilever 601 on the column 6.

[0057] S8: First, connect and fix the web of the profiled steel connecting piece 501 with the vertical plate of the cantilever 601 through the fixing plate, and then align and weld the flange plates of the profiled steel connecting piece 50 with the horizontal plates of the cantilever 601 respectively.

[0058] S9: Arrange temporary supports between the beam body 5 and the ground.

[0059] S10: Control the lifting mechanism 2 to descend until the lifting mechanism 4 is completely separated from the beam body 5, and the installation is completed. Then repeat S3 - S9 to install the next precast concrete beam.

[0060] In this embodiment, in step S2, the special construction equipment enters the construction floor through the construction elevator by using the traveling mechanism, so as to further avoid occupying the working time of the tower crane.

[0061] During specific implementation, in order to improve the calibration accuracy, before lifting the beam body in step S3, the installation orientation and elevation characteristic points corresponding to the building axis are pre - marked on the beam body. When finely adjusting and correcting the horizontal position and pitching angle of the beam body in step S6, the laser level ray is used for assistance, so that the laser level ray coincides with the installation orientation and elevation characteristic points on the beam body.

[0062] Please refer to Figures 2 to 4 Based on the above construction method, this embodiment also discloses a special construction equipment, including a traveling mechanism 1, on which a lifting mechanism 2 is provided, on which a calibration mechanism 3 is provided, and on which a lifting mechanism 4 is provided; where: the lifting mechanism 4 includes a lifting plate 401, on which a number of rollers for supporting the beam body 5 are provided, and at least some of the rollers are active rollers 402, so that the position of the beam body 5 in its length direction is adjustable. On both sides of the lifting plate 401, a fixed limit plate 403 and a movable limit plate 404 are respectively provided, and the gap between the fixed limit plate 403 and the movable limit plate 404 can be used as a limit space adapted to the width of the beam body 5.

[0063] As Figure 4 shown, in specific implementation, all the rollers are active rollers 402, and the rotating shafts of the active rollers 402 are all connected to the output shaft of a driving motor 405 through a worm and gear transmission assembly. In this embodiment, a cavity is formed in the lifting plate 401, and the worm and gear structure is installed in the cavity. Specifically, the worm and gear structure includes a transmission shaft connected to the output shaft of the driving motor 405, on which a worm gear is provided corresponding to each active roller 402, and a worm is also provided on the rotating shaft of each active roller 402, and the worm meshes with the corresponding worm gear. When the driving motor 405 is started, its output shaft drives the transmission shaft to rotate, thereby driving the worm gear to rotate, and the worm gear drives the worm to rotate to drive the active roller 402 to rotate. When the motor is not turned on, since the worm and gear transmission assembly has a self-locking function, it can prevent the beam body 5 from shifting during transportation to reduce potential safety hazards.

[0064] From Figure 3 and Figure 4 it can be seen that in order to reduce the friction between the surface of the beam body 5 and the movable limit plate 404 and facilitate the active rollers to push the beam body 5 to move along its length direction, a number of guide rollers 406 for guiding the beam body 5 to slide along its length direction are also provided on the fixed limit plate 403.

[0065] As Figure 4As shown, the movable limiting plate 404 is hinged to the lifting plate 401 through an ear plate 407, and an adjusting assembly for adjusting the rotation position of the lifting plate 401 is further provided between the movable limiting plate 404 and the lifting plate 401. Specifically, the adjusting assembly includes a telescopic cylinder 408. The cylinder body of the telescopic cylinder 408 is hinged to the lifting plate 401, and the telescopic rod of the telescopic cylinder 408 is hinged to the movable limiting plate 404. When the telescopic rod of the telescopic cylinder 408 extends, the movable limiting plate 404 can rotate counterclockwise. When the end of the movable limiting plate 404 abuts against the surface of the beam body 5, the beam body 5 can be limited. It can be understood that during the transportation of the beam body 5, the telescopic cylinder 408 can be controlled to apply a large force to the beam body 5 to achieve the clamping effect on the beam body 5, thereby preventing the beam body 5 from moving during the transportation by the traveling mechanism 1 (refer to Figures 9 to 11 ). When it is necessary to actively roll the beam body 5 to move it to the installation position of the support column 6, the telescopic cylinder 408 can be controlled to apply a small force to the beam body 5, reducing the friction between the movable limiting plate 404 and the beam body 5 while playing a limiting role, so as to ensure the effective work of the active roller (refer to Figures 12 to 14 ). Preferably, in order to prevent the surface of the beam body 5 from being scratched when the movable limiting plate 404 rotates, a plurality of rolling wheels 409 that can roll on the surface of the beam body 5 are further provided at the end of the movable limiting plate 404.

[0066] Please refer to FIGS. 5 to Figure 8 . In the specific implementation process, the calibration mechanism 3 is used on the one hand to finely adjust the horizontal position of the lifting mechanism 4, and on the other hand to correct the pitching angle of the lifting mechanism 4. The specific structure of the calibration mechanism 3 is as follows:

[0067] The calibration mechanism 3 includes an upper mounting base 301 and a lower mounting base 302. A first servo cylinder 303 is arranged between the upper mounting base 301 and the fixed limiting plate 403. The cylinder body of the first servo cylinder 303 is hinged to the upper mounting base 301, and the telescopic rod of the first servo cylinder 303 is hinged to the fixed limiting plate 403. A slide table 304 is arranged on the lower mounting base 302. A slider 305 pushed by a second servo cylinder 307 is arranged on the slide table 304. A support 306 for supporting the lifting plate 401 is also hinged to the slider 305. When it is necessary to correct the pitching angle of the beam body 5, it is only necessary to control the telescopic rod of the first servo cylinder 303 to extend or shorten. Under the action of the first servo cylinder 303, the lifting mechanism 4 can rotate around the rotating shaft between the support 306 and the slider 305, so as to realize the fine adjustment of the pitching angle of the beam body 5. When it is necessary to correct the position of the beam body 5 in the horizontal direction, first control the telescopic rod of the first servo cylinder 303 to extend or shorten by a length d, and then control the telescopic rod of the second servo motor to extend or shorten by a length d, so that the beam body 5 can move forward or backward horizontally by a distance d. It should be noted that in this embodiment, the purpose of using the first servo cylinder 303 and the second servo cylinder 307 is to improve the calibration accuracy to meet the positioning adjustment requirements during the installation of precast concrete beams, and control the installation error within a very small range, so as to ensure the construction quality.

[0068] As Figure 7 shown, in order to meet the installation requirements of assembled precast concrete beams and improve the flexibility of special construction equipment, the lifting mechanism 2 adopts multi-stage lifting. The specific structure of the lifting mechanism 2 is as follows:

[0069] The lifting mechanism 2 adopts three-stage lifting. A first lifting guide rail 201 is vertically arranged on the traveling mechanism 1. A second lifting guide rail 202 is vertically arranged on the first lifting guide rail 201. A third lifting guide rail 203 is vertically arranged on the second lifting guide rail 202. The calibration mechanism 3 is arranged on the third lifting guide rail 203.

[0070] In summary, the construction method of the present invention can achieve the rapid installation and precise adjustment of prefabricated concrete beams, reduce the operation volume of tower cranes, is beneficial to reducing the impact on the main line construction period, accelerating the construction progress, and generally reducing the mechanical cost; at the same time, less manual participation is required during the installation operation, which on the one hand reduces the labor cost and on the other hand is also beneficial to ensuring the construction quality; the special construction equipment of the present invention can quickly lift the prefabricated concrete beams pre-stacked on the construction floor through the lifting mechanism 4, reduce the operation volume of the installation of prefabricated concrete beams, reduce the impact on the main line construction period, and improve the installation speed; through the calibration mechanism 3, the position of the beam body 5 can be finely adjusted in the horizontal direction and the pitching angle, and in cooperation with the active roller 402, the prefabricated concrete beam can be quickly positioned without manual intervention, with low labor intensity and fast construction speed; through the mutual cooperation of the lifting mechanism 2, the calibration mechanism 3 and the lifting mechanism 4, on the one hand, hard connections are adopted, compared with the soft connections of traditional tower cranes, the adjustment difficulty of node positioning is reduced, the installation accuracy is improved, and thus the building quality is generally improved. On the other hand, the installation and adjustment processes are completed at one time, which is beneficial to further improving the construction efficiency.

[0071] Finally, it should be noted that the above-disclosed technical solutions are only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. Construction method applied to prefabricated precast concrete beams, characterized in that It includes the following steps: S1: The precast concrete beams are uniformly and standardizedly manufactured by the precast factory and then transferred to the predetermined positions on the construction floors and stacked neatly on the sleeper timbers; S2: Transfer the special construction equipment to the construction floors, and the special construction equipment includes a traveling mechanism, a lifting mechanism, a calibration mechanism and a lifting mechanism; S3: Drive the special construction equipment to the stacking place of the precast concrete beams through the traveling mechanism, and lift the beam body by using the lifting mechanism and the lifting mechanism; S4: After the beam body is lifted in place, control the movable limit plate of the lifting mechanism to tighten to limit and fix the beam body, and then drive the special construction equipment to the vicinity of the column position through the traveling mechanism and preliminarily adjust the orientation of the special construction equipment according to the position of the cantilevered corbels on the columns; S5: Continuously lift the beam body to the predetermined elevation through the lifting mechanism; S6: Use the calibration mechanism to finely adjust and correct the horizontal position and pitching angle of the beam body so that the profiled steel connectors at the ends of the beam body are aligned with the cantilevered corbels on the columns; S7: Control the movable limit plate of the lifting mechanism to relax, and drive the beam body to move along its length direction by using the active rollers until the profiled steel connectors at the ends of the beam body come into contact with the cantilevered corbels on the columns; S8: First, connect and fix the web of the profiled steel connector to the vertical plate of the cantilevered corbel through the fixing plate, and then align and weld the flange plates of the profiled steel connector to the horizontal plates of the cantilevered corbel respectively; S9: Arrange temporary supports between the beam body and the ground; S10: Control the lifting mechanism to descend until the lifting mechanism is completely separated from the beam body, and the installation is completed. Then repeat S3 - S9 to install the next precast concrete beam.

2. The construction method for precast concrete beams used in prefabricated building components according to claim 1, characterized in that: In step S2, the special construction equipment enters the construction floors through the construction elevator by using the traveling mechanism.

3. The construction method applied to the prefabricated precast concrete beam according to claim 1, characterized in that: Before lifting the beam body in step S3, mark the installation orientation and elevation characteristic points corresponding to the building axis on the beam body in advance, and use the laser level ray assistance when finely adjusting and correcting the horizontal position and pitching angle of the beam body in step S6 to make the laser level ray coincide with the installation orientation and elevation characteristic points on the beam body.

4. A dedicated construction equipment applied to the construction method according to any one of claims 1-3, characterized in that: It includes a traveling mechanism, on which a lifting mechanism is arranged, on which a calibration mechanism is arranged, and on which a lifting mechanism is arranged; wherein: the lifting mechanism includes a lifting plate, on which a number of rollers for supporting the beam body are arranged, and at least some of the rollers are active rollers so that the position of the beam body in its length direction is adjustable, and a fixed limit plate and a movable limit plate are respectively arranged on both sides of the lifting plate, and the gap between the fixed limit plate and the movable limit plate can be used as a limit space adapted to the width of the beam body.

5. The dedicated construction equipment according to claim 4, characterized in that: All the rollers are active rollers, and the rotating shafts of the active rollers are all connected to the output shaft of a driving motor through a worm and gear transmission assembly.

6. The dedicated construction equipment according to claim 5, characterized in that: A number of guide rollers for guiding the beam body to slide along its length direction are also arranged on the fixed limit plate.

7. The dedicated construction equipment according to claim 6, characterized in that: The movable limit plate is hinged to the lifting plate through an ear plate, and an adjusting assembly for adjusting the rotating position of the lifting plate is also arranged between the movable limit plate and the lifting plate.

8. The dedicated construction equipment according to claim 7, characterized in that: The adjusting assembly includes a telescopic cylinder, the cylinder body of the telescopic cylinder is hinged to the lifting plate, and the telescopic rod of the telescopic cylinder is hinged to the movable limit plate.

9. The dedicated construction equipment according to claim 8, characterized in that: A number of rolling wheels that can roll on the surface of the beam body are further provided at the end of the movable limit plate.

10. The dedicated construction equipment according to any one of claims 4-9, characterized in that: The calibration mechanism includes an upper mounting seat and a lower mounting seat. A first servo cylinder is arranged between the upper mounting seat and the fixed limit plate. The cylinder body of the first servo cylinder is hinged to the upper mounting seat, and the telescopic rod of the first servo cylinder is hinged to the fixed limit plate. A slide table is arranged on the lower mounting seat, a slider pushed by a second servo cylinder is arranged on the slide table, and a support for supporting the lifting plate is also hinged on the slider.

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