Movable roof of large-span steel structure building and steel structure building

Abstract

The invention relates to the technical field of movable building roofs, in particular to a large-span steel structure building movable roof and a steel structure building, the large-span steel structure building movable roof comprises a roof frame, an opening and closing frame, driving assemblies, a multifunctional rod assembly and a control system, and the driving assemblies are oppositely arranged on the roof frame; the opening and closing frame slides on the roof frame and is connected with the driving assembly, and when the driving assembly is controlled by a control system to drive the opening and closing frame to linearly move relative to the roof frame, opening and closing of the roof frame are controlled. The multifunctional rod assembly comprises a rotating base installed on one side of the interior of the roof frame and a control assembly installed on the other side of the interior of the roof frame, a multifunctional rod is rotationally connected to the rotating base, and one end of the control assembly extends into the roof frame and is limited to the bottom of the multifunctional rod.

Description

Technical Field

[0001] This invention relates to the field of movable building roofing technology, and particularly to movable roofs for large-span steel structures and steel structures. Background Technology

[0002] Large public buildings (such as train stations and logistics warehouses) often use large-span steel structure canopies to shelter outdoor platforms from wind and rain. The space under these canopies is often used for temporary drying of items (such as work clothes and cleaning tools), but traditional fixed canopies have significant drawbacks: their roofs are always closed, resulting in insufficient ventilation and low drying efficiency for the dried items; if there is no roof at all, the items are vulnerable to sudden wind and rain.

[0003] Existing retractable roofs mostly adopt simple sliding structures. Although they can achieve opening and closing functions, they have the following shortcomings: they do not consider the needs of drying, lack integrated drying rods and position adjustment mechanisms, and require temporary equipment to be set up when drying; when the roof is closed, the drying rods are still in a horizontally extended state, blocking light from entering the interior of the building behind and affecting natural lighting; they lack weather-responsive automated control, requiring manual intervention in opening and closing operations, and cannot respond to sudden severe weather in a timely manner. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution: A movable roof and steel structure for a large-span steel building, comprising a roof frame, a lifting and closing frame, a drive assembly, a multi-functional rod assembly, and a control system. The drive assembly is mounted opposite to the roof frame. The lifting and closing frame slides on the roof frame and is connected to the drive assembly. The control system controls the roof frame to open and close when the drive assembly drives the lifting and closing frame to move linearly relative to the roof frame. The multi-functional rod assembly includes a rotating base installed on one side inside the roof frame and a control assembly installed on the other side inside the roof frame. A multi-functional rod is rotated onto the rotating base. One end of the control assembly extends into the roof frame and is confined to the bottom of the multi-functional rod, keeping the multi-functional rod horizontal. The other end of the control assembly extends outside the roof frame and can drive the lifting and closing frame to switch between horizontal and tilted states.

[0005] As a further preferred embodiment, the drive assembly includes a screw mounted on the roof frame and a transmission seat driven on the screw. The opening and closing frame slides on the roof frame and is connected to the transmission seat. The screw has a bidirectional reverse thread, and a transmission seat is installed on each of the two reverse threads. The opening and closing frame is located at two points, left and right, and is respectively connected to the left and right transmission seats.

[0006] As a further preferred embodiment, the roof frame is equipped with two bearing seats, and the two ends of the screw are mounted on the two bearing seats. The drive assembly also includes a motor installed at one end of the roof frame, and the output end of the motor is connected to one end of the screw.

[0007] As a further preferred embodiment, the control system includes a controller and sensors arranged opposite to each other, wherein the sensors include at least a rain sensor module and a wind sensor module, and the sensors are electrically connected to the motor.

[0008] As a further preferred embodiment, the multi-functional rod is provided with a horizontal hanging rod in the middle, the left end of the horizontal hanging rod is connected to the middle of the left end of the multi-functional rod, and the right end of the horizontal hanging rod is connected to the middle of the right end of the multi-functional rod.

[0009] This invention also discloses a steel structure building, wherein the roof frame is an arched frame composed of two first transverse supports at the front and rear and a first arc-shaped support welded between the top surfaces of the two first transverse supports at the front and rear. Several first arc-shaped supports are curved upwards, and a large ventilation opening is left between the two first arc-shaped supports near the middle position. The other two first arc-shaped supports are closed by transparent glass windows. The shape of the two opening and closing frames on the left and right is consistent with the shape of the roof frame. The opening and closing frame is an arched frame composed of two second transverse supports at the front and rear and a second arc-shaped support welded to the top of the two second transverse supports at the front and rear. The two second arc-shaped supports are closed by transparent glass windows. When the opposite ends of the two opening and closing frames are closed, the ventilation opening is closed; conversely, when the opposite ends of the two opening and closing frames are separated, the ventilation opening is opened. The rotating seat is installed on the left side of the first transverse supports on the front and rear sides. The multi-functional rod is rectangular and can switch between tilting and horizontal rotation relative to the inner side of the ventilation opening. The control assembly includes a pressure rod connected to at least one of the first arc-shaped supports. The pressure rod enters the roof frame vertically downwards and a tread wheel is installed at the bottom end of the pressure rod. The control assembly also includes an inclined seat fixed to the multi-functional rod and capable of rolling over the tread wheel. The inclined seat gradually tilts downwards toward the opening direction of the opening and closing frame. The free end of the multi-functional rod is rotatably connected to the first transverse support by a tension spring.

[0010] Two first lateral supports roll into contact with the two front and rear second lateral supports, and the mating surfaces are sealed with sealing strips. The roof frame, opening / closing frame, drive assembly, multi-functional rod assembly, and control system are also included. The drive assembly is mounted opposite to the roof frame. The opening / closing frame slides on the roof frame and is connected to the drive assembly. The control system controls the opening and closing of the roof frame by controlling the drive assembly to move the opening / closing frame linearly relative to the roof frame. The multi-functional rod assembly includes a rotating base mounted on one side inside the roof frame and a control assembly mounted on the other side inside the roof frame. A multi-functional rod is mounted on the rotating base. One end of the control assembly extends into the roof frame and is confined to the bottom of the multi-functional rod, keeping it horizontal. The other end of the control assembly extends outside the roof frame and can drive the opening / closing frame, controlling the multi-functional rod to switch between horizontal and tilted positions.

[0011] As a further preferred embodiment, the drive assembly includes a screw mounted on the roof frame and a transmission seat driven on the screw. The opening and closing frame slides on the roof frame and is connected to the transmission seat. The screw has a bidirectional reverse thread, and a transmission seat is installed on each of the two reverse threads. The opening and closing frame is located at two points, left and right, and is respectively connected to the left and right transmission seats.

[0012] As a further preferred embodiment, the roof frame is equipped with two bearing seats, and the two ends of the screw are mounted on the two bearing seats. The drive assembly also includes a motor installed at one end of the roof frame, and the output end of the motor is connected to one end of the screw.

[0013] As a further preferred embodiment, the control system includes a controller and sensors arranged opposite to each other, wherein the sensors include at least a rain sensor module and a wind sensor module, and the sensors are electrically connected to the motor.

[0014] As a further preferred embodiment, the multi-functional rod is provided with a horizontal hanging rod in the middle, the left end of the horizontal hanging rod is connected to the middle of the left end of the multi-functional rod, and the right end of the horizontal hanging rod is connected to the middle of the right end of the multi-functional rod.

[0015] This invention also provides a steel structure building, wherein the roof frame is an arched frame composed of two first transverse supports at the front and rear and a first arc-shaped support welded between the top surfaces of the two first transverse supports at the front and rear. Several first arc-shaped supports are provided and curved upwards. A large ventilation opening is left between the two first arc-shaped supports near the center on the left and right sides. The other two first arc-shaped supports are closed by transparent glass windows. The shape of the two opening and closing frames on the left and right sides is consistent with the shape of the roof frame. Each opening and closing frame is an arched frame composed of two second transverse supports at the front and rear and a second arc-shaped support welded to the top of the two second transverse supports at the front and rear. The two second arc-shaped supports are closed by transparent glass windows. When the opposite ends of the two opening and closing frames are closed, the ventilation opening is closed; conversely, when the opposite ends of the two opening and closing frames are separated, the ventilation opening is opened. The rotating seat is installed on the left side of the first transverse supports on the front and rear sides. The multi-functional rod is rectangular and can switch between tilting and horizontal rotation relative to the inner side of the ventilation opening.

[0016] The control assembly includes a pressure rod connected to at least one of the first arc-shaped supports. The pressure rod enters the roof frame vertically downwards and a tread wheel is installed at the bottom end of the pressure rod. The control assembly also includes an inclined seat fixed to the multi-functional rod and capable of rolling over the tread wheel. The inclined seat gradually tilts downwards toward the opening direction of the opening and closing frame. The free end of the multi-functional rod is rotatably connected to the first transverse support by a tension spring.

[0017] The two first lateral supports at the front and rear are in rolling contact with the two second lateral supports at the front and rear, and the mating surfaces are sealed with a sealing strip.

[0018] The advantages of this invention compared to the prior art are: Through the mechanical linkage between the opening and closing frame and the control components, the multi-functional pole automatically aligns horizontally for drying and enhanced ventilation when the roof is open, and automatically tilts to collect items when closed, simultaneously achieving efficient drying and weather protection. After the roof is closed, the tilted position of the multi-functional pole concentrates the drying items on one side of the canopy, preventing horizontal extension from obstructing windows and ensuring uninterrupted natural light indoors. The control system uses meteorological signals to control the drive assembly, achieving synchronized automation of roof opening and closing and pole status switching, responding promptly to sudden storms and minimizing manual intervention. The drive assembly at the top of the roof frame directly drives the sliding opening and closing frame, and the symmetrical layout of the rotating seat and control components ensures stable execution of the linkage action even in large-span scenarios. The multi-functional pole is integrated inside the roof frame, eliminating the need for additional drying facilities, saving platform space and improving functionality. When the opening and closing mechanism closes, it triggers a reverse action in the control components, causing the multi-functional rod to rotate downwards around the swivel base to an inclined state. Simultaneously, the clothes being dried slide towards one side of the roof rack, preventing them from blocking sunlight from entering the house and affecting lighting. Conversely, when the weather is normal, the rain or wind sensor module sends a normal command to the controller, which then powers on the motor. The motor drives the screw to rotate in the opposite direction, and through the forward and reverse threads on both sides of the screw, it drives the left and right transmission seats to move in opposite linear directions along the roof rack. This causes the left and right opening and closing mechanisms to separate from each other, achieving intelligent control. The multi-functional rod then rotates upwards around the swivel base to a horizontal state, allowing the clothes being dried to be ventilated and exposed to sunlight, thus increasing the drying speed. Attached Figure Description

[0019] Figure 1 A schematic diagram of a movable roof for a large-span steel structure building provided for an embodiment of the present invention; Figure 2 The movable roof of the large-span steel structure building provided in the embodiments of the present invention is composed of... Figure 1 Enlarged view of part A leading to the image; Figure 3 The movable roof of the large-span steel structure building provided in the embodiments of the present invention is composed of... Figure 1 A diagram illustrating another angle; Figure 4 A schematic diagram of a large-span steel structure building with its movable roof fully opened, as provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the roof frame alone in a movable roof for a large-span steel structure building, provided as an embodiment of the present invention.

[0020] In the diagram: 1. Roof frame; 101. First lateral support; 102. First arc-shaped support; 103. Ventilation opening; 2. Opening and closing frame; 201. Second lateral support; 202. Second arc-shaped support; 31. Screw; 32. Transmission seat; 33. Motor; 4. Multifunctional rod assembly; 41. Rotary seat; 42. Control assembly; 421. Pressure rod; 422. Treadmill; 423. Inclined seat; 43. Multifunctional rod; 431. Lateral hanging rod. Detailed Implementation

[0021] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In one implementation, such as Figures 1-5 As shown: This embodiment provides a movable roof for a large-span steel structure building, including a roof frame 1, a closing frame 2, a drive assembly, a multi-functional rod assembly 4, and a control system. The drive assembly is mounted opposite to the roof frame 1. The closing frame 2 slides on the roof frame 1 and is connected to the drive assembly. The roof frame 1 has an opening in the middle. When the closing frame 2 reaches the middle of the roof frame 1, it closes the opening of the roof frame 1, thus closing the roof frame 1, which is equivalent to closing the roof. Since the control system and drive assembly are provided, the control system controls the drive assembly to move the closing frame 2 relative to the roof frame 1. During linear motion, the roof frame 1 can be controlled to complete automatic opening and closing actions. The multi-functional lever assembly 4 includes a rotating seat 41 installed on one side inside the roof frame 1 and a control assembly 42 installed on the other side inside the roof frame 1. A multi-functional lever 43 is connected to the rotating seat 41. One end of the control assembly 42 extends into the roof frame 1 and is restricted to the bottom of the multi-functional lever 43, so that the multi-functional lever 43 is horizontal. The other end of the control assembly 42 extends outside the roof frame 1 and can drive the opening and closing state of the opening and closing frame 2 to control the multi-functional lever 43 to switch back and forth between horizontal and tilted.

[0023] When the control system starts the drive assembly, the drive assembly moves the opening and closing frame 2 along the roof frame 1 in a straight line to one end of the roof frame 1, so that the roof frame 1 can be opened and closed. During normal ventilation, under the drive of the drive assembly, the opening and closing frame 2 moves to one end of the roof frame 1 and moves away from the control component 42 and the opening. At this time, the roof frame 1 is opened, the control component 42 releases the restriction on the bottom of the multi-functional rod 43, and the multi-functional rod 43 rotates around the swivel seat 41 to a horizontal state under its own weight or the action of the reset mechanism, providing a drying surface; at this time, the roof is fully opened, and the external airflow enters the tent to accelerate the drying of the clothes. Conversely, during windy and rainy weather, driven by the drive assembly, the opening and closing frame 2 moves along the roof frame 1 to close the opening on the roof frame 1. At this time, the roof frame 1 closes, and the opening and closing frame 2 contacts the extended end of the control component 42, driving the control component 42 to act. This causes the control component 42 to exert upward force on the bottom of the multi-functional rod 43, forcing the multi-functional rod 43 to rotate downward around the turntable 41 to an inclined state. At the same time, the clothes being dried slide to one side of the roof frame 1; simultaneously, the roof frame 1 closes to form a rain barrier. The linear movement of the opening and closing frame 2 controls the opening and closing of the roof (the roof frame 1 is equivalent to the roof) and simultaneously adjusts the tilt angle of the multi-functional rod 43 by triggering the control component 42, achieving a dual automated switching between "open roof horizontal drying + ventilation" and "closed roof tilted storage + rain protection". The control system controls the drive assembly's movements, influencing the clothes being dried in different ways, thus achieving automation. When the opening / closing frame 2 closes, it triggers the control component 42, causing the multi-functional rod to tilt from horizontal to horizontal, concentrating the clothes on one side. For example, when this roof is used as a platform canopy, it acts as the canopy's roof, and the clothes are dried. Only when drying is needed, by moving the opening / closing frame 2 to open the ventilation opening (or opening) of the roof frame 1, the control component 42 is triggered, causing the multi-functional rod 43 to rotate from tilted to horizontal, allowing the clothes to be spread out for drying. At this time, not only is the ventilation opening open, allowing airflow or light to directly enter the canopy, accelerating the drying speed. Conversely, in windy or rainy weather, when drying is not needed, the opening / closing frame 2 closes the ventilation opening of the roof frame 1. This not only protects the clothes but also, when the opening / closing frame 2 closes, it triggers the control component 42 to reverse, causing the multi-functional rod 43 to rotate downwards around the rotating base 41 to a tilted state. Simultaneously, the clothes being dried are concentrated and slid to one side of the roof frame 1, preventing light from blocking the light from entering the room. Therefore, the opening action of the roof rack 1 will be linked to the state of the clothes being dried, which not only satisfies the drying needs, but also ensures that there is enough light to penetrate into the room where people are located.

[0024] In another embodiment, the drive assembly includes a screw 31 mounted on the roof frame 1 and a transmission seat 32 driven by the screw 31. The opening / closing frame 2 slides on the roof frame 1 and is connected to the transmission seat 32. The screw 31 has a bidirectional reverse thread, with a transmission seat 32 mounted on each of the two reverse threads. The opening / closing frame 2 is located at two points, left and right, and is connected to the left and right transmission seats 32 respectively. Two bearing seats are mounted on the roof frame 1, and both ends of the screw 31 are mounted on the two bearing seats. The drive assembly also includes a motor 33 mounted at one end of the roof frame 1, with the output end of the motor 33 connected to one end of the screw 31. The control system includes a controller and sensors arranged opposite each other, wherein the sensors include at least a rainwater sensor module and a wind force sensor module, and the sensors are electrically connected to the motor 33.

[0025] For example, if the items being dried are clothes, during windy or rainy weather, the rain sensor module or wind sensor module sends an abnormal command to the controller. The controller then powers on the motor 33, which drives the screw 31 to rotate. The screw 31's threads on both sides cause the left and right transmission seats 32 to move in opposite directions along the roof frame 1. The left and right transmission seats 32 then drive the left and right opening and closing frames 2 to move in opposite directions until their opposite ends reach the middle of the roof frame 1 and close together (closing the ventilation openings of the roof frame 1). When the opening and closing frames 2 close, the control component 42 is triggered to perform a reverse action, causing the multi-functional rod 43 to rotate downwards around the rotating seat 41 to an inclined state, simultaneously concentrating the dried clothes. The light slides to one side of the roof rack 1 to avoid blocking light from entering the room (since there's no need to dry clothes, the light transmittance is allowed to pass through the roof of this invention and better reflect back to the indoor environment where people are). Conversely, when the weather is normal, the rain sensor module or wind sensor module sends a normal command to the controller, which then controls the motor 33 to operate. The motor 33 drives the screw 31 to rotate in the opposite direction. Through the forward and reverse threads on both sides of the screw 31, the left and right transmission seats 32 move in a straight line in the opposite direction along the roof rack 1. The left and right transmission seats 32 drive the left and right opening and closing frames 2 to move in opposite directions until the opposite ends of the two opening and closing frames 2 separate from each other from the middle of the roof rack 1 (opening the ventilation opening of the roof rack 1), thus achieving intelligent control. At the same time, the multi-functional rod 43 rotates upward around the rotating seat 41 to a horizontal state, which allows the clothes to be ventilated and sun-dried, improving the drying speed.

[0026] In another embodiment, the multi-functional rod 43 has a horizontal hanging rod 431 in the middle for hanging items. The left end of the horizontal hanging rod 431 is connected to the middle of the left end of the multi-functional rod 43, and the right end of the horizontal hanging rod 431 is connected to the middle of the right end of the multi-functional rod 43. When the multi-functional rod 43 is tilted, the horizontal hanging rod 431 is also tilted, and the hanging items are moved to the same side using the horizontal hanging rod 431. When the multi-functional rod 43 is horizontal, the horizontal hanging rod 431 is also horizontal, and the hanging items are artificially and evenly distributed using the horizontal hanging rod 431, thereby improving ventilation.

[0027] In addition to the above-mentioned roof structure, this invention also includes a steel structure building. The roof frame 1 is an arched frame composed of two front and rear first transverse supports 101 and a first arc-shaped support 102 welded between the top surfaces of the two front and rear first transverse supports 101. Several first arc-shaped supports 102 are present and curve upwards. A large ventilation opening 103 (ventilation hole) is left between the two left and right first arc-shaped supports 102 near the middle position. The other two first arc-shaped supports 102 are closed by transparent glass windows. The shapes of the left and right opening / closing frames 2 are consistent with the shape of the roof frame 1. The opening / closing frames 2 are arched frames composed of two front and rear second transverse supports 201 and a second arc-shaped support 202 welded to the top of the two front and rear second transverse supports 201. The two second arc-shaped supports 202 are closed by transparent glass windows. When the opposite ends of the two opening / closing frames 2 are closed, the ventilation opening 103 is closed; conversely, when the opposite ends of the two opening / closing frames 2 are open, the ventilation opening 103 is closed. When the opposite ends are separated, the vent 103 (ventilation hole) is opened, the rotatable seat 41 is installed on the left side of the first transverse support 101 on the front and rear sides, the multi-functional rod 43 is rectangular and can switch between tilting and horizontal rotation relative to the inner side of the vent 103, the two first transverse supports 101 and the two second transverse supports 201 roll into each other, and the mating surfaces are sealed by a sealing strip. The control component 42 includes a pressure rod 421 connected to at least one first arc-shaped support 102. The pressure rod 421 enters the roof frame 1 vertically downward, and a tread wheel 422 is installed at the bottom end of the pressure rod 421. The control component 42 also includes an inclined seat 423 fixed on the multi-functional rod 43 and capable of rolling with the tread wheel 422. The inclined seat 423 gradually tilts downward in the opening direction of the opening and closing frame 2. The free end of the multi-functional rod 43 is rotatably connected to the first transverse support 101 by a tension spring.

[0028] In practical use, this steel structure is erected on the building body as a roof. For example, when used as a canopy for an enclosed platform, when the left and right opening and closing frames 2 are separated, the ventilation openings 103 are opened to allow external air to enter the canopy and ventilate and dry the items hanging on the multi-functional poles 43. When the left and right opening and closing frames 2 are closed, the ventilation openings 103 are opened to protect the items hanging on the multi-functional poles 43 inside the canopy. The left and right ends of the roof frame 1 and the outer ends of the left and right opening and closing frames 2 are all enclosed by glass. When used in an arched state, it can increase the space. When the two opening and closing frames 2 are opened for ventilation, the air intake rate is increased. The arched shape mentioned here includes curved shapes such as U-shapes. The transparent glass windows used are environmentally friendly. It is worth noting that the structure of the control component 42 is limited. For example, when the left opening and closing frame 2 moves to the left (vent 103 opens), the pressure rod 421 moves the tread wheel 422 to the left, so that the tread wheel 422 moves away from the inclined seat 423, and the multi-functional rod 43 approaches horizontal under the upward pull of the tension spring. Conversely, when the left opening and closing frame 2 moves to the right (vent 103 closes or opens), the pressure rod 421 moves the tread wheel 422 to the right and gradually presses the inclined seat 423 from the bottom point to the top point along the inclined surface. The pressure of the inclined seat 423 drives the multi-functional rod 43 to rotate downward to the tilt, so that the hanging object moves to the same side.

[0029] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0030] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A movable roof for a large-span steel structure building, characterized in that, The system includes a roof frame (1), a lifting and closing frame (2), a drive assembly, a multi-functional lever assembly (4), and a control system. The drive assembly is disposed opposite to the roof frame (1). The lifting and closing frame (2) slides on the roof frame (1) and is connected to the drive assembly. The control system controls the roof frame (1) to open and close when the drive assembly drives the lifting and closing frame (2) to move linearly relative to the roof frame (1). The multi-functional lever assembly (4) includes a rotating seat (41) installed on one side inside the roof frame (1) and a mounting bracket. On the other side of the roof frame (1), there is a control component (42) with a multi-functional rod (43) attached to the rotating seat (41). One end of the control component (42) extends into the roof frame (1) and is restricted to the bottom of the multi-functional rod (43) so that the multi-functional rod (43) is horizontal. The other end of the control component (42) extends outside the roof frame (1) and can drive the opening and closing state of the opening and closing frame (2) to control the multi-functional rod (43) to switch back and forth between horizontal and tilted.

2. The movable roof of a large-span steel structure building according to claim 1, characterized in that, The drive assembly includes a screw (31) mounted on the roof frame (1) and a transmission seat (32) driven on the screw (31). The opening and closing frame (2) slides on the roof frame (1) and is connected to the transmission seat (32). The screw (31) is a bidirectional reverse thread, and a transmission seat (32) is installed on each of the two reverse threads. The opening and closing frame (2) is located on the left and right sides and is connected to the left and right transmission seats (32) respectively.

3. The movable roof of a large-span steel structure building according to claim 2, characterized in that, The roof frame (1) is equipped with two bearing seats on the left and right sides. The two ends of the screw (31) are assembled on the two bearing seats. The drive assembly also includes a motor (33) installed at one end of the roof frame (1). The output end of the motor (33) is connected to one end of the screw (31).

4. The movable roof of a large-span steel structure building according to claim 3, characterized in that, The control system includes a controller and sensors arranged opposite to each other, wherein the sensors include at least a rain sensor module and a wind sensor module, and the sensors are electrically connected to the motor (33).

5. The movable roof of a large-span steel structure building according to claim 4, characterized in that, The multi-functional pole (43) has a horizontal hanging rod (431) in the middle. The left end of the horizontal hanging rod (431) is connected to the middle of the left end of the multi-functional pole (43), and the right end of the horizontal hanging rod (431) is connected to the middle of the right end of the multi-functional pole (43).

6. A steel structure building, constructed using the movable roof of a large-span steel structure building as described in claim 5, characterized in that, The roof frame (1) is an arched frame consisting of two front and rear first transverse supports (101) and a first arc-shaped support (102) welded between the top surfaces of the two front and rear first transverse supports (101). Several first arc-shaped supports (102) are present and curve upwards. A large ventilation opening (103) is left between the two first arc-shaped supports (102) near the center. The other two first arc-shaped supports (102) are enclosed by transparent glass windows. The shapes of the left and right opening and closing frames (2) are consistent with the shape of the roof frame (1). The opening and closing frames (2) consist of two front and rear second transverse supports (201). An arched frame consisting of a second arc-shaped support (202) welded to the top of the two second transverse supports (201) at the front and rear, and the two second arc-shaped supports (202) are closed by a transparent glass window. When the opposite ends of the two opening and closing frames (2) are closed, the ventilation opening (103) is closed; conversely, when the opposite ends of the two opening and closing frames (2) are separated, the ventilation opening (103) is opened. The rotating seat (41) is installed on the left side of the first transverse support (101) at the front and rear sides. The multi-functional rod (43) is rectangular and can switch between tilting and horizontal rotation relative to the inner side of the ventilation opening (103).

7. The steel structure building according to claim 6, characterized in that, The control component (42) includes a pressure rod (421) connected to at least one of the first arc-shaped supports (102). The pressure rod (421) enters the roof frame (1) vertically downward, and a tread wheel (422) is installed at the bottom end of the pressure rod (421). The control component (42) also includes an inclined seat (423) fixed to the multi-functional rod (43) and capable of rolling with the tread wheel (422). The inclined seat (423) gradually tilts downward in the opening direction of the opening and closing frame (2). The free end of the multi-functional rod (43) is rotatably connected to the first transverse support (101) by a tension spring.

8. The steel structure building according to claim 7, characterized in that, The two first transverse supports (101) at the front and rear are in rolling contact with the two second transverse supports (201) at the front and rear, and the mating surfaces are sealed by a sealing strip.

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