Construction device and construction method of large-space building roof structure

Abstract

The invention provides a large-space building roof structure construction device and a construction method thereof, and belongs to the technical field of building roof structure construction devices.The large-space building roof structure construction device structurally comprises a movable vehicle platform, a first construction mechanism is movably hinged to the left side of the movable vehicle platform, and a second construction mechanism is vertically arranged on the top face of the first construction mechanism; an infrared alignment assembly is arranged on the left side of the top face of the first construction mechanism, an operation table is arranged on the left side of the top face of the movable trolley table, and a controller is arranged in a left side cavity of the movable trolley table. The real-time monitoring and adjusting mechanism ensures the stability and safety of the construction process and improves the construction quality.

Description

Technical Field

[0001] The invention relates to a construction device for a roof structure of a large-space building and a construction method thereof, belonging to the technical field of construction devices for the roof structure of a building. Background Art

[0002] Steel structure buildings are structures made of steel materials and are one of the main types of large-space building structures. Steel is characterized by high strength, light weight, good overall rigidity, and strong resistance to deformation. Therefore, it is particularly suitable for building large-span, super-high, and super-heavy buildings.

[0003] In existing steel structure buildings, the main roof beams of the house are vertically lifted and erected by a hoist, and then multiple workers work together to assist in twisting the direction and adjusting the angle. In this process, it is necessary to repeatedly calibrate with a spirit level, and it is also necessary to draw horizontal and vertical alignment lines of the two main beams, which is time-consuming and labor-intensive, and has low work efficiency. In view of the above shortcomings, the present invention proposes a construction device and a construction method for a roof structure of a large space building. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a construction device and a construction method for a roof structure of a large-space building to solve the existing problems.

[0005] In order to achieve the above-mentioned object, the present invention is implemented through the following technical scheme: a construction device for a roof structure of a large-space building, the structure of which includes a mobile platform, and a first construction mechanism is movably hinged on the left side of the mobile platform, and a second construction mechanism is vertically arranged on the top surface of the first construction mechanism, an infrared alignment component is arranged on the left side of the top surface of the first construction mechanism, an operating table is arranged on the left side of the top surface of the mobile platform, a controller is arranged in the cavity on the left side of the mobile platform, and the first construction mechanism, the second construction mechanism, the infrared alignment component and the operating table are electrically connected to the controller; The first construction mechanism includes a horizontal lifting mechanism, and a rotating chassis group is sleeved on the top surface of the horizontal lifting mechanism, and a first motor is engaged on the left side of the rotating chassis group, and a first level sensor is arranged on the front side of the horizontal lifting mechanism; The second construction mechanism includes a base, and a swing seat group is sleeved in the middle of the base, and two positioning reinforcement components are sleeved through the front and rear sides of the base, the inner sides of the two positioning reinforcement components are movably electromagnetically connected to the front and rear sides of the swing seat group, and a construction arm group is vertically arranged on the right side of the swing seat group; The construction arm group includes an outer arm, and a telescopic arm group is movably sleeved in the cavity on the top surface of the outer arm, and a supporting telescopic member is connected on the left side between the outer arm and the telescopic arm group, and two first telescoping devices are connected on the front and rear sides between the outer arm and the telescopic arm group.

[0006] A further improvement is that the mobile platform includes a mobile platform body, and a construction activity opening is opened in the middle of the right side of the mobile platform body, and a support platform for recovering and laying the first construction mechanism flat is set in the middle of the left side of the construction activity opening, and two hinged seats are set at the front and rear ends of the left side of the top surface of the support platform.

[0007] A further improvement is that the horizontal lifting mechanism includes a lifting platform, and two first rotating shaft members sleeved with the hinge seat are arranged at the front and rear ends of the left side of the lifting platform, and a second telescopic device is vertically hinged on the right side of the bottom surface of the lifting platform; When the second telescopic device rises, it pushes the lifting platform to lift to the right at a unilateral angle, and the maximum unilateral lifting angle of the lifting platform to the right is 25°.

[0008] A further improvement is that the rotating chassis assembly includes a rotating disk body, a main shaft is vertically arranged in the middle of the bottom surface of the rotating disk body, a first arc-shaped rack is arranged on the left side of the rotating disk body, and the first motor is provided with a first driving gear meshing with the first arc-shaped rack; When the first motor rotates, the rotating disk body is caused to rotate forward and backward on the main shaft through the first driving gear and the first arc-shaped rack, and the maximum rotation angle of the rotating disk body is 20° forward and backward.

[0009] A further improvement is that the base includes a base body, and a swing groove is opened in the middle of the base body, and a plurality of electromagnetic disk openings are opened in a circular array on the front and rear groove walls of the swing groove, and a plurality of swing seat assembly openings are opened in the middle of the front and rear groove walls of the swing groove.

[0010] A further improvement is that the swing seat assembly includes a swing seat body, and a plurality of second rotating shafts are longitudinally arranged on the front and rear sides of the swing seat body, and a second arc-shaped rack is arranged on the left side of the swing seat body, a second motor is meshed on the left side of the second arc-shaped rack, and a second driving gear meshed with the second arc-shaped rack is arranged on the second motor, and the swing seat body is made of iron; When the second motor rotates, the swing seat body is caused to swing up and down on the two second rotating shafts through the second driving gear and the second arc-shaped rack, and the maximum swing angle of the swing seat body is 45 degrees each.

[0011] A further improvement is that the two positioning and reinforcing components include a sleeve disk, and the inner side of the sleeve disk is provided with a plurality of first electromagnetic suction cups in a ring array, which are respectively mounted in a one-to-one correspondence with the electromagnetic disk openings on one side.

[0012] A further improvement is that the telescopic arm group includes a telescopic arm body, and a plurality of second electromagnetic suction cups are arranged at intervals on the right side of the telescopic arm body, and a second horizontal sensor is arranged on the left side of the telescopic arm body, a telescopic sleeve column is vertically arranged on the bottom surface of the telescopic arm body, and an L-shaped clamping edge is arranged on the right side of the telescopic arm body.

[0013] A further improvement is that the infrared alignment component includes a longitudinal rail, and a slider is movably sleeved on the longitudinal rail, and a vertical rod is vertically arranged on the top surface of the slider, and a rotator and a far-infrared locator are arranged on the top of the vertical rod.

[0014] A further improvement is that the first rotating shaft component, the main shaft component and the second rotating shaft component are all composed of a rotating shaft and a bearing sleeve.

[0015] In addition, the present invention also provides a construction device and a construction method for the above-mentioned large-space building roof structure, and the construction method is as follows: First, the steel structure beam is lifted and erected vertically by an external crane, and then the mobile platform is moved to the steel structure beam. At this time, the first horizontal sensor will automatically sense the horizontal level, and then the second telescopic device will rise and push the lifting platform to lift it to the right side to keep the top surface of the lifting platform horizontally aligned; Then the staff manually assists in pushing the erected steel structure beam to the second electromagnetic suction cup to be electromagnetically adsorbed. At this time, one side of the steel structure beam needs to be flat against the L-shaped clamp edge to ensure that the electromagnetically adsorbed steel structure beam will not be skewed. Before the electromagnetic adsorption of the construction arm group, the outer arm and the telescopic arm group need to be in the unfolded state to complete the vertical electromagnetic adsorption capture of the steel structure beam on the telescopic arm group; Then, the position of the far-infrared locator is longitudinally displaced by the slider on the infrared alignment component, and the angle of the far-infrared locator is adjusted by the rotator to complete the adjustment of the far-infrared positioning line. Then, the first motor is rotated to horizontally align the rotation angle of the vertical beam of the steel structure with the far-infrared positioning line on the far-infrared locator through the rotating disk body and the construction arm group. Then, according to the angle at which the vertical beam of the steel structure is to be installed, the angle value of the second horizontal sensor is set first, and then the second motor is used to drive the swing seat assembly to turn its angle. During this process, the second horizontal sensor will also turn with the angle. When the angle of the second horizontal sensor reaches the set value, the second motor stops, and each of the first electromagnetic suction cups on the two positioning and reinforcement components electromagnetically absorbs and reinforces the swing seat body to complete the vertical installation angle adjustment of the vertical beam of the steel structure; Finally, the two first telescopic devices are retracted to make the telescopic arm assembly descend on the outer arm, driving the vertical beam of the steel structure to descend and be screwed or welded to the base cast on the ground.

[0016] The beneficial effects of the present invention are: The present invention provides a construction device for a roof structure of a large-space building and a construction method thereof. A construction device for installing a main supporting vertical beam on a roof of a building is formed by a structural combination design of a first construction mechanism, a second construction mechanism, an infrared alignment component, an operating table, and a controller on a mobile platform. The horizontal lifting mechanism on the first construction mechanism of the device is designed to cooperate with a first horizontal sensor, so that when the horizontal lifting mechanism is started through the operating table, the first construction mechanism can automatically adjust and maintain the level through automatic horizontal sensing, thereby ensuring that the second construction mechanism will not be tilted as a whole when operating. The coordinated design of the infrared alignment component and the rotating chassis group enables the second construction mechanism to align horizontally with the adjacent horizontal or vertical steel structure beams after electromagnetically adsorbing the steel structure beams, thus realizing the twisting and azimuth operation of the steel structure beams. This operation is simple and does not require multiple workers to twist manually, nor does it require manual drawing of alignment lines in advance. The operation is simple and easy. The cooperation between the swing seat group and the second level sensor assists the construction arm group in adjusting the angle of inclination. It is only necessary to set the inclination angle value of the second level sensor on the operating table and use the controller as the overall control of the device to accurately adjust the angle of the swing seat group. In addition, two positioning and reinforcement components are designed on the front and rear sides of the swing seat group to position and reinforce the swing seat group after adjusting the angle. The construction arm group uses a telescopic device to achieve automatic extension and retraction of the construction arm group, and the construction arm group uses electromagnetic adsorption to catch materials, making it faster to take and put materials. In addition, the construction arm group is designed with an L-shaped clamp edge for vertical alignment, so that the vertical beam of the steel structure will not be skewed after being caught; During the above-mentioned construction process, the construction status is monitored in real time and adjustments are made through the sensors and control systems integrated in the device. This real-time monitoring and adjustment mechanism ensures the stability and safety of the construction process and improves the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a construction device for a large-space building roof structure of the present invention; Figure 2 This is a schematic diagram of the structure of the mobile platform of the present invention; Figure 3 It is a schematic diagram of the structure of the first construction mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the second construction mechanism of the present invention; Figure 5 This is a schematic diagram of the base structure of the present invention; Figure 6 It is a schematic diagram of the structure of the swing seat assembly of the present invention; Figure 7 This is a schematic diagram of the structure of the positioning and reinforcement assembly of the present invention; Figure 8 It is a schematic diagram of the construction arm group structure of the present invention; Fig. 9 It is a right side view of the telescopic arm assembly of the present invention; Fig.10 It is a schematic diagram of the structure of the infrared alignment component of the present invention. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] See also Figure 1-Figure 10 The present invention provides a construction device and a construction method for a roof structure of a large-space building: the structure includes a mobile platform 1, and a first construction mechanism 2 is movably hinged on the left side of the mobile platform 1, and a second construction mechanism 3 is vertically arranged on the top surface of the first construction mechanism 2, an infrared alignment component 4 is arranged on the left side of the top surface of the first construction mechanism 2, an operating table 5 is arranged on the left side of the top surface of the mobile platform 1, and a controller 6 is arranged in the left cavity of the mobile platform 1, the first construction mechanism 2, the second construction mechanism 3, the infrared alignment component 4 and the operating table 5 are electrically connected to the controller 6, the first construction mechanism 2 includes a horizontal lifting mechanism 21, and a rotating chassis group 22 is sleeved on the top surface of the horizontal lifting mechanism 21, and a first motor is engaged on the left side of the rotating chassis group 22 23, a first horizontal sensor 24 is arranged on the front side of the horizontal lifting mechanism 21, the second construction mechanism 3 includes a base 31, a swing seat group 32 is sleeved in the middle of the base 31, and two positioning reinforcement components 33 are sleeved through the front and rear sides of the base 31, the inner sides of the two positioning reinforcement components 33 are movably electromagnetically connected to the front and rear sides of the swing seat group 32, a construction arm group 34 is vertically arranged on the right side of the swing seat group 32, the construction arm group 34 includes an outer arm 341, and a telescopic arm group 342 is movably sleeved in the top surface cavity of the outer arm 341, and a supporting telescopic member 343 is connected on the left side between the outer arm 341 and the telescopic arm group 342, and two first telescoping devices 344 are connected on the front and rear sides between the outer arm 341 and the telescopic arm group 342.

[0020] The mobile platform 1 includes a mobile platform body 11, and a construction activity opening 12 is opened in the middle of the right side of the mobile platform body 11, and a support platform 13 for recovering and laying the first construction mechanism 2 is set in the middle of the left side of the construction activity opening 12, and two hinged seats 14 are set at the front and rear ends of the left side of the top surface of the support platform 13.

[0021] The horizontal lifting mechanism 21 includes a lifting platform 211, and two first rotating shafts 212 connected to the hinge seat 14 are arranged at the front and rear ends of the left side of the lifting platform 211, and a second telescopic device 213 is vertically hinged on the right side of the bottom surface of the lifting platform 211. When the second telescopic device 213 rises, it pushes the lifting platform 211 to lift to the right at a unilateral angle, and the maximum unilateral lifting angle of the lifting platform 211 to the right is 25°.

[0022] The rotating chassis assembly 22 includes a rotating disk body 221, and a main shaft member 222 is vertically arranged in the middle of the bottom surface of the rotating disk body 221, and a first arc-shaped rack 223 is arranged on the left side of the rotating disk body 221. The first motor 23 is provided with a first driving gear meshing with the first arc-shaped rack 223. When the first motor 23 rotates, the rotating disk body 221 is rotated forward and backward on the main shaft member 222 through the first driving gear and the first arc-shaped rack 223, and the maximum rotation angle of the rotating disk body 221 is 20° forward and backward.

[0023] The base 31 includes a base body 311, and a swing groove 312 is opened in the middle of the base body 311, and a plurality of electromagnetic disk openings 313 are opened in a circular array on the front and rear groove walls of the swing groove 312, and a plurality of swing seat assembly openings 314 are opened in the middle of the front and rear groove walls of the swing groove 312.

[0024] The swing seat assembly 32 includes a swing seat body 321, and a plurality of second rotating shafts 322 are longitudinally arranged on the front and rear sides of the swing seat body 321, and a second arc-shaped rack 323 is arranged on the left side of the swing seat body 321, and a second motor 324 is meshed with the left side of the second arc-shaped rack 323, and a second driving gear meshed with the second arc-shaped rack 323 is arranged on the second motor 324. The swing seat body 321 is made of iron. When the second motor 324 rotates, the swing seat body 321 is caused to swing up and down on the two second rotating shafts 322 through the second driving gear 324 and the second arc-shaped rack 323, and the maximum up and down swing angle of the swing seat body 321 is 45° each.

[0025] The two positioning and reinforcing components 33 include a sleeve 331 , and a plurality of first electromagnetic suction cups 332 corresponding to the electromagnetic disk openings 313 on one side are arranged in a circular array on the inner side of the sleeve 331 .

[0026] The telescopic arm group 342 includes a telescopic arm body 3421, and a plurality of second electromagnetic suction cups 3422 are arranged at intervals on the right side of the telescopic arm body 3421, and a second horizontal sensor 3423 is arranged on the left side of the telescopic arm body 3421, a telescopic sleeve column 3424 is vertically arranged on the bottom surface of the telescopic arm body 3421, and an L-shaped clamping edge 2425 is arranged on the right side of the telescopic arm body 3421.

[0027] The infrared alignment assembly 4 includes a longitudinal rail 41 , and a slider 42 is movably sleeved on the longitudinal rail 41 , and a vertical rod 43 is vertically arranged on the top surface of the slider 42 , and a rotator 44 and a far-infrared positioner 45 are arranged on the top of the vertical rod 43 .

[0028] Working principle: First, the steel structure vertical beam is lifted and erected by an external crane, and then the mobile platform 1 is moved to the location where the steel structure vertical beam is installed. At this time, the first horizontal sensor 24 automatically senses the horizontal level, and then rises through the second telescopic device 213, pushing the lifting platform 211 to lift unilaterally to the right, so that the top surface of the lifting platform 211 remains horizontally aligned; Because the ground is not entirely level, the mobile platform 1 sometimes tilts when it moves to the installation location of the steel structure vertical beam. The first horizontal sensor 24 automatically transmits a horizontal sensing signal to the controller 6, and the controller 6 automatically issues a command to the horizontal lifting mechanism 21 to automatically adjust the level of the lifting platform 211, thereby ensuring that the multiple mechanisms on the upper end of the lifting platform 211 maintain horizontal operation in subsequent operations.

[0029] Then the staff manually assists in pushing the erected steel structure beam to the second electromagnetic suction cup 3422 to be electromagnetically attracted. At this time, one side of the steel structure beam needs to be flat against the L-shaped clamp edge 2425, so as to ensure that the electromagnetically attracted steel structure beam will not be skewed. Before the construction arm group 34 electromagnetically attracts, the outer arm 341 and the telescopic arm group 342 need to be in the unfolded state to complete the vertical electromagnetic attraction and capture of the steel structure beam on the telescopic arm group 342. This operation is mainly used for the suction of I-beam or square steel shaped steel structure vertical beams. The design of the L-shaped clamping edge 2425 is to enable the I-beam to be horizontally inserted into the electromagnetic adsorption. When it is flat with the L-shaped clamping edge 2425, it will not be stuck and cannot be horizontally inserted. Before the electromagnetic adsorption of the construction arm group 34, the outer arm 341 and the telescopic arm group 342 need to be in the unfolded state, so that the steel structure vertical beam can be stably lowered after the subsequent twisting position or adjusting the angle, and then screwed or welded to the base cast on the ground. The material of the above-mentioned steel structure vertical beam must contain iron elements, so that the second electromagnetic suction cups 3422 on the telescopic arm group 342 can be captured by electromagnetic adsorption.

[0030] Then, the position of the far-infrared locator 45 is longitudinally displaced by the slider 42 on the infrared alignment assembly 4, and the angle of the far-infrared locator 45 is adjusted by the rotator 44 to complete the adjustment of the far-infrared positioning line, and then the first motor 23 is rotated to horizontally align the rotation angle of the steel structure vertical beam with the far-infrared positioning line on the far-infrared locator 45 through the rotating disk body 221 and the construction arm group 34; The far-infrared locator 45 on the infrared alignment component 4 is aligned with another steel structure vertical beam adjacent to the steel structure vertical beam to be installed in the transverse or longitudinal direction. In this way, after the steel structure vertical beam is installed, multiple steel structure vertical beams can be aligned in the transverse or longitudinal direction. The main function of the rotating chassis group 22 is to assist in the torsion of the steel structure vertical beam on the construction arm group 34.

[0031] Then, according to the angle at which the vertical beam of the steel structure is to be installed, the angle value of the second horizontal sensor 3423 is first set, and then the second motor 324 is used to drive the swing seat assembly 32 to turn its angle. During this process, the second horizontal sensor 3423 will also turn with the angle. When the angle of the second horizontal sensor 3423 reaches the set value, the second motor 324 stops, and the first electromagnetic suction cups 332 on the two positioning and reinforcement components 33 electromagnetically absorb and reinforce the swing seat body 321, thereby completing the vertical installation angle adjustment of the vertical beam of the steel structure; The vertical beams of steel structures are generally installed vertically, and the telescopic arm group 342 is initialized to be vertically aligned. Therefore, there is no need to set the angle value of the second horizontal sensor 3423. The vertical beams of the steel structures adsorbed by the telescopic arm group 342 will be in a vertical state, and the next step of installation can be directly carried out. The reinforced adsorption swing seat body 321 of the other two positioning reinforcement components 33 is to make the engagement of the second motor 324 and the swing seat group 32 less susceptible to force, thereby effectively preventing the vertical beams of the steel structures from tilting at an angle on the telescopic arm group 342. In addition, the second horizontal sensor 3423 is mainly used for the installation of the tilt angle of the vertical beams of steel structures. After some vertical beams of steel structures are installed vertically, auxiliary beams need to be installed obliquely.

[0032] Finally, the two first telescopic devices 344 are retracted to make the telescopic arm group 342 descend on the outer arm 341, driving the vertical beam of the steel structure to descend and be screwed or welded to the base cast on the ground.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A construction device for a roof structure of a large-space building, characterized in that: The structure comprises a movable platform (1), wherein a first construction mechanism (2) is movably hinged on the left side of the movable platform (1), and a second construction mechanism (3) is vertically arranged on the top surface of the first construction mechanism (2), an infrared alignment component (4) is arranged on the left side of the top surface of the first construction mechanism (2), an operating table (5) is arranged on the left side of the top surface of the movable platform (1), a controller (6) is arranged in the left cavity of the movable platform (1), and the first construction mechanism (2), the second construction mechanism (3), the infrared alignment component (4) and the operating table (5) are electrically connected to the controller (6); The first construction mechanism (2) comprises a horizontal lifting mechanism (21), wherein a rotating chassis group (22) is sleeved on the top surface of the horizontal lifting mechanism (21), and a first motor (23) is engaged on the left side of the rotating chassis group (22), and a first level sensor (24) is arranged on the front side of the horizontal lifting mechanism (21); The second construction mechanism (3) comprises a base (31), wherein a swing seat assembly (32) is sleeved in the middle of the base (31), and two positioning reinforcement components (33) are sleeved through the front and rear sides of the base (31), the inner sides of the two positioning reinforcement components (33) are movably electromagnetically connected to the front and rear sides of the swing seat assembly (32), and a construction arm assembly (34) is vertically arranged on the right side of the swing seat assembly (32); The construction arm group (34) comprises an outer arm (341), and a telescopic arm group (342) is movably sleeved in a cavity on the top surface of the outer arm (341), and a supporting telescopic member (343) is connected on the left side between the outer arm (341) and the telescopic arm group (342), and two first telescopic devices (344) are connected on the front and rear sides between the outer arm (341) and the telescopic arm group (342).

2. The construction device for a large-space building roof structure according to claim 1, characterized in that: The mobile platform (1) comprises a mobile platform body (11), wherein a construction opening (12) is provided in the middle of the right side of the mobile platform body (11), and a support platform (13) for recovering and laying the first construction mechanism (2) is provided in the middle of the left side of the construction opening (12), and two hinged seats (14) are provided at the front and rear ends of the left side of the top surface of the support platform (13).

3. The construction device for a large-space building roof structure according to claim 2, characterized in that: The horizontal lifting mechanism (21) comprises a lifting platform (211), and two first rotating shafts (212) sleeved with the hinge seat (14) are arranged at the front and rear ends of the left side of the lifting platform (211), and a second telescopic device (213) is vertically hinged on the right side of the bottom surface of the lifting platform (211); When the second retractor (213) rises, it pushes the lifting platform (211) to lift to the right at a unilateral angle, and the maximum right unilateral lifting angle of the lifting platform (211) is 25°.

4. The construction device for a large-space building roof structure according to claim 3, characterized in that: The rotating chassis assembly (22) comprises a rotating disk body (221), a main shaft member (222) is vertically arranged in the middle of the bottom surface of the rotating disk body (221), a first arc-shaped rack (223) is arranged on the left side of the rotating disk body (221), and the first motor (23) is provided with a first driving gear meshing with the first arc-shaped rack (223); When the first motor (23) rotates, the rotating disk body (221) is caused to rotate forward and backward on the main shaft (222) via the first driving gear and the first arc-shaped rack (223), and the maximum rotation angle of the rotating disk body (221) is 20° forward and backward.

5. The construction device for a large-space building roof structure according to claim 4, characterized in that: The base (31) comprises a base body (311), a swing groove (312) is provided in the middle of the base body (311), a plurality of electromagnetic disk openings (313) are provided in a circular array on the front and rear groove walls of the swing groove (312), and a plurality of swing seat assembly openings (314) are provided in the middle of the front and rear groove walls of the swing groove (312).

6. The construction device for a large-space building roof structure according to claim 5, characterized in that: The swing seat assembly (32) comprises a swing seat body (321), and a plurality of second rotating shafts (322) are longitudinally arranged on the front and rear sides of the swing seat body (321), and a second arc-shaped rack (323) is arranged on the left side of the swing seat body (321), a second motor (324) is meshed on the left side of the second arc-shaped rack (323), and a second driving gear meshed with the second arc-shaped rack (323) is arranged on the second motor (324), and the swing seat body (321) is made of iron; When the second motor (324) rotates, the swing seat body (321) swings up and down on the two second rotating shafts (322) via the second driving gear (324) and the second arc-shaped rack (323), and the maximum up and down swing angle of the swing seat body (321) is 45 degrees each.

7. The construction device for a large-space building roof structure according to claim 6, characterized in that: The two positioning and reinforcing components (33) include a sleeve disk (331), and the inner side surface of the sleeve disk (331) is provided with a plurality of first electromagnetic suction cups (332) in a ring array, which are respectively mounted in a one-to-one correspondence with the electromagnetic disk openings (313) on a single side.

8. The construction device for a large-space building roof structure according to claim 7, characterized in that: The telescopic arm group (342) comprises a telescopic arm body (3421), a plurality of second electromagnetic suction cups (3422) are arranged at intervals on the right side of the telescopic arm body (3421), and a second horizontal sensor (3423) is arranged on the left side of the telescopic arm body (3421), a telescopic sleeve column (3424) is vertically arranged on the bottom surface of the telescopic arm body (3421), and an L-shaped clamping edge (2425) is arranged on the right side of the telescopic arm body (3421).

9. The construction device for a large-space building roof structure according to claim 8, characterized in that: The infrared alignment component (4) comprises a longitudinal rail (41), a slider (42) is movably sleeved on the longitudinal rail (41), a vertical rod (43) is vertically arranged on the top surface of the slider (42), and a rotator (44) and a far-infrared positioner (45) are arranged on the top of the vertical rod (43).

10. A construction method using the construction device for a large-space building roof structure according to any one of claims 1 to 9, characterized in that: The construction method is as follows: First, the steel structure vertical beam is lifted and erected by an external crane, and then the mobile platform (1) is moved to the steel structure vertical beam. At this time, the first horizontal sensor (24) automatically senses the horizontal position, and then the second telescopic device (213) is raised and pushed to the lifting platform (211) to lift it unilaterally to the right, so that the top surface of the lifting platform (211) remains horizontally aligned; Then, the staff manually assists in pushing the erected steel structure beam to the second electromagnetic suction cup (3422) to be electromagnetically attracted. At this time, one side of the steel structure beam needs to be flat against the L-shaped clamp edge (2425), so as to ensure that the electromagnetically attracted steel structure beam will not be skewed. Before the construction arm group (34) is electromagnetically attracted, the outer arm (341) and the telescopic arm group (342) need to be in an unfolded state to complete the vertical electromagnetic attraction and capture of the steel structure beam on the telescopic arm group (342); then, the position of the far-infrared locator (45) is longitudinally displaced by the slider (42) on the infrared alignment component (4), and the angle of the far-infrared locator (45) is adjusted by the rotator (44) to complete the adjustment of the far-infrared positioning line, and then the first motor (23) is rotated to horizontally align the rotation angle of the steel structure beam with the far-infrared positioning line on the far-infrared locator (45) through the rotating disk body (221) and the construction arm group (34); Then, according to the angle at which the vertical beam of the steel structure is to be installed, the angle value of the second horizontal sensor (3423) is first set, and then the second motor (324) is used to drive the swing seat assembly (32) to rotate in angle. During this process, the second horizontal sensor (3423) will also rotate in angle. When the angle of the second horizontal sensor (3423) reaches the set value, the second motor (324) stops, and the first electromagnetic suction cups (332) on the two positioning and reinforcement components (33) perform electromagnetic adsorption reinforcement and fixation on the swing seat body (321), thereby completing the vertical installation angle adjustment of the vertical beam of the steel structure; Finally, the two first telescopic devices (344) are retracted to allow the telescopic arm assembly (342) to descend on the outer arm (341), driving the steel structure vertical beam to descend and be screwed or welded to the base cast on the ground.

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