A prefabricated building steel structure

Abstract

The present invention discloses a prefabricated building steel structure, belonging to the field of steel structure buildings. A prefabricated building steel structure includes columns, cross beams, installation frames and a roof. The cross beams are fixedly connected between two adjacent columns. The installation frames are fixed on the tops of multiple columns. The roof is fixed on the tops of the installation frames. Connection seats are fixedly connected to the bottoms of the columns. A support assembly is further included. The support assembly is arranged between the upper and lower cross beams and is used to improve the stability of the overall structure. In the present invention, the exhaust blades installed in the hollow ring can quickly ventilate the inside of the steel structure building, and the filter cloth bags are used to filter the ventilation air flow, ensuring the cleanliness of the ventilation air flow. Moreover, in cooperation with the clean water collected in the water collecting tank, the filter cloth bags can be wetted and cleaned, effectively improving the heat dissipation and dust removal effects, and making use of the stored rainwater, which is more energy-saving and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure buildings, and particularly to a prefabricated building steel structure. Background Art

[0002] During the construction of a building, in order to improve the construction efficiency of the building, people usually use steel structure prefabricated parts for assembly to form a skeleton, and then lay building materials on the skeleton to form a building. A steel structure house is a structure composed of steel materials and is one of the main building structure types. The structure is mainly composed of beam steels, steel columns, steel trusses and other components made of section steels and steel plates. Welds, bolts or rivets are usually used to connect between the components or parts. Because of its light self-weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields.

[0003] At present, the heat dissipation in existing steel structure buildings is poor, there is no ventilation structure, and the air inside the house cannot be circulated, resulting in too high a temperature inside the house and reducing the comfort level in the steel structure building; moreover, the stability of the connection part between the beam and the column is insufficient. During long-term use, the connection part is prone to looseness under the action of load forces such as wind force and gravity, reducing the overall stability of the steel structure building and having certain potential safety hazards. Therefore, a prefabricated building steel structure is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems that the heat dissipation in existing steel structure buildings is poor, there is no ventilation structure, reducing the comfort level in the steel structure building; and under the action of various load forces, the connection part is prone to looseness, reducing the overall stability of the steel structure building and having certain potential safety hazards, and to propose a prefabricated building steel structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A prefabricated building steel structure includes columns, cross beams, installation frames and roofs. The cross beams are fixedly connected between two adjacent columns. The installation frames are fixed on the tops of multiple columns. The roofs are fixed on the tops of the installation frames. Connection seats are fixedly connected to the bottoms of the columns. A support assembly is further included. The support assembly is arranged between the upper and lower cross beams and is used to improve the stability of the overall structure.

[0007] In order to improve the overall stability of the steel structure, preferably, the support assembly includes a hollow ring. The hollow ring is located between the upper and lower cross beams. Four support rods are fixedly connected to the outer wall periphery of the hollow ring. The four groups of support rods are symmetrically arranged along the center of the hollow ring, and the ends of the support rods away from the hollow ring are fixedly connected between the upper and lower cross beams.

[0008] To reduce the impact of water flow, preferably, a buffer eaves is fixedly connected to the bottom of the slope surface of the roof. A water collecting trough is formed in the buffer eaves. A plurality of groups of water collecting holes are equidistantly formed at the top of the side of the buffer eaves close to the roof. The bottom end of the water collecting hole is communicated with the inner cavity of the water collecting trough. A dust filtering net is fixedly connected to the surface of the buffer eaves, and the dust filtering net covers the top of the input end of the water collecting hole.

[0009] To improve the ventilation effect, preferably, a rotating shaft is rotatably connected in the hollow ring. A suction fan blade is fixedly connected to the end of the rotating shaft. A driving motor is fixedly connected to the top of the hollow ring. The output shaft of the driving motor is in transmission connection with the rotating shaft through a pulley group.

[0010] To improve the cleanliness of the ventilation air flow, preferably, a ventilation box is fixedly connected to the side wall of the input end of the hollow ring. The ventilation box is communicated with the inner cavity of the hollow ring. An air inlet pipe is fixedly connected and communicated with the side wall of the ventilation box. A dust filtering plate is fixedly connected in the ventilation box.

[0011] Furthermore, a filtering groove and a water storage trough are respectively formed in the dust filtering plate. A filtering cloth bag is fixedly connected in the filtering groove. A plurality of groups of water dripping holes are equidistantly formed between the water storage trough and the filtering groove, and the output end of the water dripping hole is located directly above the filtering cloth bag.

[0012] Furthermore, a water guide pipe is fixedly connected to the top of the ventilation box. The other end of the water guide pipe is communicated with the inner cavity of the water collecting trough, and the output end of the water guide pipe is communicated with the top of the inner cavity of the water storage trough. A sewage discharge pipe is fixedly connected to the side wall of the ventilation box, and the sewage discharge pipe is communicated with the inner cavity of the ventilation box close to the air inlet pipe.

[0013] To facilitate the water supply to the water storage trough, preferably, a water injection pipe is fixedly connected to the side wall of the buffer eaves. The top end of the water injection pipe is communicated with the inner cavity of the water collecting trough. The bottom end of the water injection pipe is communicated with an existing water supply device, and a one-way valve is arranged in the water injection pipe.

[0014] To improve the connection stability, preferably, a water purification pipe is fixedly connected to the side wall of the ventilation box. The water purification pipe is communicated with the inner cavity of the ventilation box close to the hollow ring. Expansion grooves are formed in the connecting pieces at both ends of the cross beam. A contact plate is slidably connected to both sides of the inner cavity of the expansion groove. The other end of the water purification pipe is communicated with the cavity formed between the two contact plates, and the cavity is filled with a water-swellable polymer.

[0015] Preferably, a plurality of groups of overhead rods are equidistantly and fixedly connected to the top of the inner wall of the roof. Both ends of the overhead rods are fixedly connected to the top of the installation frame.

[0016] Compared with the prior art, the present invention provides a prefabricated building steel structure, which has the following beneficial effects:

[0017] 1. For this prefabricated building steel structure, the exhaust blades installed in the hollow ring can quickly ventilate the steel structure building, and the filter cloth bag is used to filter the ventilation air flow, ensuring the cleanliness of the ventilation air flow. Moreover, combined with the clean water collected in the water collection tank, it can moisten and clean the filter cloth bag, effectively improving the heat dissipation and dust removal effect, and making use of the stored rainwater, which is more energy-saving and environmentally friendly.

[0018] 2. For this prefabricated building steel structure, the clean water obtained by filtering rainwater flows into the expansion tank along the clean water pipe, causing the water-swellable polymer to expand and solidify into a hard state in the cavity, so that the contact plates on both sides expand outwards to form a state of closely fitting the inner wall of the groove of the column, effectively improving the fixing effect of the cross beam, ensuring the stability of the steel structure building, and improving the overall safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of a prefabricated building steel structure proposed by the present invention;

[0020] Figure 2 is a schematic diagram of the partial cross-sectional structure of a prefabricated building steel structure proposed by the present invention;

[0021] Figure 3 is a prefabricated building steel structure proposed by the present invention Figure 2 magnified structure schematic diagram of area A therein;

[0022] Figure 4 is a prefabricated building steel structure proposed by the present invention Figure 2 magnified structure schematic diagram of area B therein;

[0023] Figure 5 is a prefabricated building steel structure proposed by the present invention Figure 2 magnified structure schematic diagram of area C therein;

[0024] Figure 6 is a magnified structure schematic diagram of the hollow ring of a prefabricated building steel structure proposed by the present invention;

[0025] Figure 7 is a schematic diagram of the internal structure of the ventilation box of a prefabricated building steel structure proposed by the present invention;

[0026] Figure 8 is a schematic diagram of the internal structure of the connection end of the cross beam of a prefabricated building steel structure proposed by the present invention.

[0027] In the figure: 1. column; 2. crossbeam; 21. expansion tank; 22. resistance plate; 3. installation frame; 4. roof; 41. overhead pole; 5. connecting seat; 6. hollow ring; 61. support rod; 62. rotating shaft; 63. exhaust blade; 64. driving motor; 65. pulley assembly; 66. ventilation box; 661. sewage pipe; 662. water purification pipe; 67. dust filter plate; 671. filter tank; 672. water storage tank; 673. filter bag; 674. drip hole; 68. air inlet pipe; 7. buffer eaves; 71. water collection tank; 72. water collection hole; 73. dust filter net; 74. water guide pipe; 8. water injection pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention.

[0030] Example:

[0031] Reference Figures 1-8 A prefabricated building steel structure includes a column 1, a beam 2, a mounting frame 3 and a roof 4, the beam 2 is fixedly connected between two adjacent columns 1, the mounting frame 3 is fixed on the top of multiple columns 1, the roof 4 is fixed on the top of the mounting frame 3, and multiple groups of overhead rods 41 are fixedly connected to the top of the inner wall of the roof 4 at equal intervals. Both ends of the overhead rod 41 are fixedly connected to the top of the mounting frame 3, and the bottom of the column 1 is fixedly connected with a connecting seat 5. It also includes a support assembly, which is arranged between the upper and lower beams 2. The support assembly is used to improve the stability of the overall structure.

[0032] Reference Figure 1 The supporting assembly includes a hollow ring 6, which is located between the upper and lower beams 2. Support rods 61 are fixedly connected around the outer wall of the hollow ring 6. Four groups of support rods 61 are symmetrically arranged along the center of the hollow ring 6, and one end of the support rod 61 away from the hollow ring 6 is fixedly connected to the upper and lower beams 2.

[0033] Through the arrangement of the above structure, the support rod 61 at the bottom can also be fixedly connected to the ground, so as to form a more stable support structure, which ensures the installation stability of the column 1 and can effectively prevent the loosening of the beam 2, thereby improving the stability of the entire steel structure building.

[0034] Reference Figures 1-3 A buffer eave 7 is fixedly connected to the bottom of the sloped surface of the roof 4, and the end of the buffer eave 7 is slightly tilted upward to dissipate the energy of rainwater. A water collecting trough 71 is provided in the buffer eave 7, and a plurality of groups of water collecting holes 72 are evenly spaced at the top of the side of the buffer eave 7 close to the roof 4. The bottom end of the water collecting hole 72 is connected to the inner cavity of the water collecting trough 71, and a dust filter net 73 is fixedly connected to the surface of the buffer eave 7, and the dust filter net 73 covers the top of the input end of the water collecting hole 72.

[0035] Through the arrangement of the above structure, when it rains, rainwater will slide to both sides along the roof 4, and finally fall to the ground after the buffer eaves 7 rotates to buffer and unload the force, so as to dissipate the energy of rainwater and reduce the possibility of water dripping through the stone, thereby ensuring the strength of the ground around the steel structure building and improving the stability of the structure; at the same time, when the rainwater slides to the buffer eaves 7, it will pass through the dust filter 73 and drip along the water collection hole 72 into the water collection trough 71, so as to realize the filtration and collection of rainwater for subsequent reuse of rainwater, thereby achieving energy saving effect and improving the cleanliness of the collected water flow.

[0036] Reference Figure 2 , Figure 4 A rotating shaft 62 is rotatably connected inside the hollow ring 6, an exhaust blade 63 is fixedly connected to the end of the rotating shaft 62, a driving motor 64 is fixedly connected to the top of the hollow ring 6, and the output shaft of the driving motor 64 is connected to the rotating shaft 62 through a pulley set 65.

[0037] Through the setting of the above structure, the driving motor 64 is turned on, and the transmission effect of the pulley group 65 is utilized to drive the rotating shaft 62 and the exhaust blade 63 to rotate in the hollow ring 6, thereby attracting the external airflow to move quickly along the air inlet pipe 68, the ventilation box 66, the dust filter plate 67 and the hollow ring 6 into the structural building, thereby achieving ventilation and heat dissipation effects.

[0038] In addition, if the ventilation demand is large, exhaust blades 63 can be installed in each hollow ring 6; and if the ventilation demand is small, the number of exhaust blades 63 installed can be adjusted according to demand.

[0039] Reference Figures 2-7, wherein, a ventilation box 66 is fixedly connected to the side wall of the input end of the hollow ring 6. The ventilation box 66 is communicated with the inner cavity of the hollow ring 6, and an air inlet pipe 68 is fixedly connected and communicated with the side wall of the ventilation box 66. A dust filter plate 67 is fixedly connected inside the ventilation box 66; a filter groove 671 and a water storage tank 672 are respectively formed inside the dust filter plate 67. A filter cloth bag 673 is fixedly connected inside the filter groove 671. A plurality of groups of water dripping holes 674 are equidistantly formed between the water storage tank 672 and the filter groove 671, and the output end of the water dripping hole 674 is located directly above the filter cloth bag 673; a water guide pipe 74 is fixedly connected to the top of the ventilation box 66. The other end of the water guide pipe 74 is communicated with the inner cavity of the water collection tank 71. An electromagnetic valve is arranged inside the water guide pipe 74, and the output end of the water guide pipe 74 is communicated with the top of the inner cavity of the water storage tank 672. A sewage discharge pipe 661 is fixedly connected to the side wall of the ventilation box 66. The sewage discharge pipe 661 is communicated with the inner cavity of the ventilation box 66 close to one side of the air inlet pipe 68.

[0040] Through the above structural arrangement, when the air flow passes through the dust filter plate 67, it will be filtered by the filter cloth bag 673 arranged inside it, so as to achieve the dust removal effect. At the same time, the electromagnetic valve inside the water guide pipe 74 can be opened, so that the stored clean rainwater flows along the water guide pipe 74 into the water storage tank 672, and then drips from the water dripping holes 674 onto the top of the filter cloth bag 673, so as to moisten the filter cloth bag 673 from top to bottom. First of all, the cleaning of the filter cloth bag 673 can be realized, the filtering effect of the filter cloth bag 673 is improved. By moistening the filter cloth bag 673, the dust in the air flow can be better captured, and at the same time, the air flow can be cooled, effectively improving the heat dissipation and dust removal effect, making the environment inside the steel structure building more comfortable, and making use of the stored rainwater, which is more energy-saving and environmentally friendly.

[0041] In addition, on rainy days, the electromagnetic valve inside the water guide pipe 74 can also be directly opened to realize the cleaning of the filter cloth bag 673, ensuring the use effect of the filter cloth bag 673. The water flow entering the ventilation box 66 for flushing and dust removal can finally be discharged through the sewage discharge pipe 661 to ensure the cleanliness inside the ventilation box 66 and ensure the dust removal effect; and when draining, the water flow flows from the side far away from the sewage discharge pipe 661 into the sewage discharge pipe 661, and the water flow on the side of the ventilation box 66 close to the hollow ring 6 passes through the filter cloth bag 673, so its cleanliness is relatively high. At this time, with the opening of the sewage discharge pipe 661, the water flow with relatively high cleanliness will flow towards the input end of the sewage discharge pipe 661, so as to realize the backwashing of the filter cloth bag 673, ensure the cleanliness of the filter cloth bag 673, and improve the filtering effect of the filter cloth bag 673.

[0042] Refer to Figure 1 , wherein, a water injection pipe 8 is fixedly connected to the side wall of the buffer eave 7. The top end of the water injection pipe 8 is communicated with the inner cavity of the water collection tank 71. The bottom end of the water injection pipe 8 is communicated with the existing water supply equipment, and a one-way valve is arranged inside the water injection pipe 8.

[0043] It should be noted that the one-way valve in the water injection pipe 8 only allows the existing water supply equipment to convey water flow into the water collecting tank 71.

[0044] Through the setting of the above structure, when no rainwater is collected in the water collecting tank 71 and ventilation and heat dissipation are required, the existing water supply equipment can be used to convey water flow into the water collecting tank 71, so as to smoothly realize the wetting and cleaning of the filter cloth bag 673. While enabling the device to have the energy-saving effect of collecting rainwater, it can also be filled with water according to its own needs, improving the convenience of use.

[0045] Refer to Figure 7 、 Figure 8 , wherein, a water purification pipe 662 is fixedly connected to the side wall of the ventilation box 66. The water purification pipe 662 is communicated with the inner cavity of the ventilation box 66 near one side of the hollow ring 6. Expansion grooves 21 are formed in the connecting pieces at both ends of the cross beam 2. The two sides of the inner cavity of the expansion grooves 21 are both slidably connected with abutting plates 22. The other end of the water purification pipe 662 is communicated with the cavity formed between the two abutting plates 22, and the cavity is filled with water-swellable polymer.

[0046] Through the setting of the above structure, when the water flow enters the ventilation box 66, the water flow in the inner cavity of the ventilation box 66 near one side of the hollow ring 6 is filtered by the filter cloth bag 673 and has a relatively high cleanliness. At this time, the clean water will flow into the expansion groove 21 along the water purification pipe 662 and react quickly with the water-swellable polymer in the expansion groove 21, causing the water-swellable polymer to expand and solidify into a hard state in the cavity. The expansion effect will cause the two abutting plates 22 to expand outwards, so as to closely fit the inner wall of the groove of the upright column 1, effectively improving the fixing effect of the cross beam 2, ensuring the stability of the steel structure building, and improving the safety of the steel structure building during use.

[0047] Refer to Figures 1-8 , in the present invention, during use, first, according to the dimensions of the installation drawing, a plurality of upright columns 1 are fixed on the leveled ground, and the connecting seat 5 is effectively fixedly connected to the ground. Then, the cross beam 2 is lifted and inserted between two adjacent upright columns 1 from the top in sequence, and the two are fixed by bolts; when all the cross beams 2 and upright columns 1 are installed, the installation frame 3 is hoisted to the top of multiple groups of upright columns 1 and fixed therebetween. Then, the roof 4 is hoisted to the top of the installation frame 3 and fixed therebetween, so as to form an integral steel structure building. Then, multiple groups of support rods 61 are respectively installed and fixed between the cross beams 2. Finally, the decorative layer is installed on the outer surface of the steel structure building to form a complete steel structure building.

[0048] During the use of a steel structure building, in case of rainy weather, rainwater will slide along the roof 4 to both sides. Eventually, after buffering and unloading energy through the buffer eaves 7 by swirling, it will fall to the ground, thereby dissipating the energy of the rainwater, reducing the possibility of water dripping through stone, ensuring the strength of the ground around the steel structure building, and improving the structural stability. At the same time, when the rainwater slides to the buffer eaves 7, it will pass through the dust filter net 73 and drip into the water collection tank 71 along the water collection holes 72, thereby realizing the filtration and collection of rainwater, facilitating the subsequent reuse of rainwater, achieving energy-saving effects while also improving the cleanliness of the collected water flow. When ventilation and heat dissipation are required inside the steel structure building, the driving motor 64 is turned on. Utilizing the transmission effect of the pulley group 65, the rotating shaft 62 and the exhaust fan blades 63 are driven to rotate inside the hollow ring 6, thereby attracting the outside air to quickly move into the structure building along the air inlet pipe 68, the ventilation box 66, the dust filter plate 67, and the hollow ring 6, thus realizing the ventilation and heat dissipation effect. And when the air flow passes through the dust filter plate 67, it will be filtered by the filter cloth bag 673 arranged inside it, thereby realizing the dust removal effect. At the same time, the solenoid valve inside the water guide pipe 74 can be turned on, so that the stored clean rainwater flows along the water guide pipe 74 into the water storage tank 672, and then drips from the water dripping holes 674 onto the top of the filter cloth bag 673, thereby wetting the filter cloth bag 673 from top to bottom. Firstly, it can realize the cleaning of the filter cloth bag 673, improve the filtering effect of the filter cloth bag 673. By wetting the filter cloth bag 673, it can better capture the dust in the air flow, and at the same time can cool the air flow, effectively improving the heat dissipation and dust removal effect, and making use of the stored rainwater, which is more energy-saving and environmentally friendly. In addition, the sewage discharge pipe 661 can be opened to discharge the accumulated sewage in the ventilation box 66. Since the water flow on the side close to the hollow ring 6 passes through the filter cloth bag 673, its cleanliness is relatively high. As the sewage discharge pipe 661 is opened, the water flow with relatively high cleanliness will flow towards the input end of the sewage discharge pipe 661, thereby realizing the backwashing of the filter cloth bag 673, ensuring the cleanliness of the filter cloth bag 673, and improving the filtering effect of the filter cloth bag 673.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. An assembled building steel structure, comprising columns (1), beams (2), a mounting frame (3) and a roof (4), characterized in that: The cross beam (2) is fixedly connected between two adjacent columns (1), the mounting frame (3) is fixed on the top of the plurality of columns (1), the roof (4) is fixed on the top of the mounting frame (3), the bottoms of the columns (1) are fixedly connected with connecting seats (5), and also includes a support assembly, which is arranged between the upper and lower cross beams (2), and is used to improve the stability of the overall structure; The support assembly comprises a hollow ring (6), the hollow ring (6) being located between the upper and lower cross beams (2), the outer wall of the hollow ring (6) being fixedly connected with support rods (61) around the periphery, four groups of the support rods (61) being symmetrically arranged along the center of the hollow ring (6), and one end of the support rod (61) away from the hollow ring (6) being fixedly connected to the upper and lower cross beams (2); A buffer eave (7) is fixedly connected to the bottom of the slope surface of the roof (4), a water collecting trough (71) is provided in the buffer eave (7), a plurality of groups of water collecting holes (72) are provided at equal intervals on the top of one side of the buffer eave (7) close to the roof (4), the bottom ends of the water collecting holes (72) are connected to the inner cavity of the water collecting trough (71), a dust filter (73) is fixedly connected to the surface of the buffer eave (7), and the dust filter (73) covers the top of the input end of the water collecting hole (72); A rotating shaft (62) is rotatably connected inside the hollow ring (6), an exhaust blade (63) is fixedly connected to the end of the rotating shaft (62), a driving motor (64) is fixedly connected to the top of the hollow ring (6), and an output shaft of the driving motor (64) is transmission-connected to the rotating shaft (62) via a pulley group (65).

2. The assembled steel structure according to claim 1, characterized in that: A ventilation box (66) is fixedly connected to the side wall of the input end of the hollow ring (6), the ventilation box (66) is in communication with the inner cavity of the hollow ring (6), an air inlet pipe (68) is fixedly connected to the side wall of the ventilation box (66), and a dust filter plate (67) is fixedly connected inside the ventilation box (66).

3. The assembled steel structure according to claim 2, characterized in that: A filter groove (671) and a water storage groove (672) are respectively provided in the dust filter plate (67); a filter bag (673) is fixedly connected in the filter groove (671); a plurality of groups of drip holes (674) are provided at equal intervals between the water storage groove (672) and the filter groove (671); and the output ends of the drip holes (674) are located directly above the filter bag (673).

4. The assembled building steel structure according to claim 3, characterized in that: The top of the ventilation box (66) is fixedly connected to a water pipe (74), the other end of the water pipe (74) is in communication with the inner cavity of the water collecting tank (71), and the output end of the water pipe (74) is in communication with the top of the inner cavity of the water storage tank (672). A sewage pipe (661) is fixedly connected to the side wall of the ventilation box (66), and the sewage pipe (661) is in communication with the inner cavity of the ventilation box (66) on the side close to the air inlet pipe (68).

5. The assembled steel structure according to claim 1, characterized in that: A water injection pipe (8) is fixedly connected to the side wall of the buffer eaves (7), the top end of the water injection pipe (8) is connected to the inner cavity of the water collecting tank (71), the bottom end of the water injection pipe (8) is connected to the existing water supply equipment, and a one-way valve is arranged in the water injection pipe (8).

6. The assembled steel structure according to claim 2, characterized in that: A clean water pipe (662) is fixedly connected to the side wall of the ventilation box (66), and the clean water pipe (662) is connected to the inner cavity of the ventilation box (66) close to the hollow ring (6). Expansion grooves (21) are provided in the connecting pieces at both ends of the crossbeam (2), and both sides of the inner cavity of the expansion groove (21) are slidably connected with a resistance plate (22). The other end of the clean water pipe (662) is connected to the cavity formed between the resistance plates (22) on both sides, and the cavity is filled with a water-swellable polymer.

7. The assembled building steel structure according to claim 1, characterized in that: A plurality of groups of overhead poles (41) are fixedly connected at equal intervals to the top of the inner wall of the roof (4), and both ends of the overhead poles (41) are fixedly connected to the top of the installation frame (3).

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