Fabricated steel structure

Abstract

The invention belongs to the technical field of steel structures, and particularly relates to an assembly type steel structure which comprises cambered surface splicing rods, splicing plates are fixedly connected to the cambered surface splicing rods, splicing grooves are formed in the cambered surface splicing rods, and the multiple cambered surface splicing rods can be spliced side by side in an inserted mode through cooperation of the splicing plates and the splicing grooves. A sliding groove is formed in the splicing plate, a moving block is slidably connected into the sliding groove, a vertical rod is connected to the moving block, a plurality of round holes are formed in the cambered surface splicing rod and the splicing plate, a plurality of connecting rods are rotatably connected into the round holes, and torsional springs are fixedly connected between the round holes and the connecting rods. A rotating rod is fixedly connected to the connecting rod, a snow loosening plate is fixedly connected to the rotating rod, a matching plate is fixedly connected to the rotating rod, the stirring rod can stir the matching plate to move, a stable shed body supporting frame can be constructed in the severe cold and strong wind area, and convenience is brought to shed body construction operation in the severe cold and strong wind area.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structures, and in particular relates to an assembled steel structure. Background Art

[0002] When constructing planting sheds or supply sheds in extremely cold and windy areas, traditional steel structures are often connected directly with bolts or welded on site, which makes the components easily affected by wind loads and cause displacement or loosening. After assembly, the integrity is poor and it is difficult to cope with extreme wind pressure. Especially in high-cold and strong-wind environments, the welds are prone to cracking due to temperature changes and stress concentration, making it difficult to achieve a stable support effect.

[0003] At the same time, the snow accumulated on the roof membrane needs to be cleared manually. If the snow is not cleared in time in an environment with heavy snowfall, the shed in high-altitude cold areas will easily collapse due to the pressure of snow. When the height of the shed is high, it is difficult to deal with the snow on the roof, which brings certain inconveniences to the subsequent actual use. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a prefabricated steel structure that can be suitable for shed construction operations in severe cold and windy areas, ensure the stability of the construction effect, and improve the convenience of snow removal.

[0005] A prefabricated steel structure comprises a curved surface splicing rod, a splicing plate is fixedly connected to the curved surface splicing rod, a splicing groove is provided on the curved surface splicing rod, a plurality of curved surface splicing rods can be plugged and spliced side by side with each other through the cooperation of the splicing plate and the splicing groove, a sliding groove is provided on the splicing plate, a moving block is slidably connected in the sliding groove, and a vertical rod is connected to the moving block.

[0006] It also includes a lever fixedly connected to the moving block, a plurality of circular holes are provided on the arc-surface splicing rod and the splicing plate, a plurality of connecting rods are rotatably connected in the plurality of circular holes, a torsion spring is fixedly connected between the plurality of circular holes and the plurality of connecting rods, a rotating rod is fixedly connected to the connecting rod, a snow loosening board is fixedly connected to the rotating rod, a matching plate is fixedly connected to the rotating rod, and the lever can drive the matching plate to move.

[0007] A circular groove is formed on each rotating rod, and a plurality of rotating rods can be plugged into each other through the cooperation of the connecting rod and the circular groove.

[0008] It also includes a connecting plate fixed on the arc surface splicing rod, the connecting plate is detachably connected to a work frame through bolts, the work frame is slidably connected to a slider, the slider is connected to a driving rod, and the driving rod can be inserted into the long groove of the vertical rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0010] Figure 1 and Figure 2It is a schematic diagram of the overall structure of a prefabricated steel structure;

[0011] Figure 3 It is a schematic diagram of the structure of the arc surface splicing rod;

[0012] Figure 4 It is a schematic diagram of the sectional structure of the moving block;

[0013] Figure 5 It is a schematic diagram of the structure of the moving block;

[0014] Figure 6 It is a schematic diagram of the sectional structure of the top frame;

[0015] Figure 7 It is a schematic diagram of the structure of the fixed rod;

[0016] Figure 8 It is a schematic diagram of the sectional structure of the I-shaped frame;

[0017] Figure 9 It is a schematic diagram of the structure of the rotating rod;

[0018] Figure 10 It is a schematic diagram of the structure of the driving rod. Specific implementation mode

[0019] A prefabricated steel structure includes an arc surface splicing rod 101. One side of the arc surface splicing rod 101 is fixedly connected with a splicing plate 102, and a splicing groove 103 is formed on the other side of the arc surface splicing rod 101. Multiple arc surface splicing rods 101 can be inserted and spliced side by side with each other through the cooperation of the splicing plate 102 and the splicing groove 103. A sliding groove 109 is formed on the splicing plate 102, and a moving block 201 is slidably connected in the sliding groove 109. A vertical rod 203 is detachably connected to the moving block 201 through a bolt, and an assembly groove 105 capable of passing through the moving block 201 is formed on the splicing plate 102.

[0020] Connect an appropriate number of arc surface splicing rods 101 together by inserting the splicing plate 102 into the splicing groove 103 on another arc surface splicing rod 101. Subsequently, fix the arc surface splicing rods 101 connected side by side through tightening bolts and welding, and symmetrically arrange multiple arc surface splicing rods 101 on the opposite sides of the arc surface splicing rods 101 connected side by side to form Figure 1 the posture shown, and connect multiple arc surface splicing rods 101 to the ground through foundation embedding or welding to form a group of support seats. Subsequently, set another group of support seats at an appropriate distance according to the construction requirements, repeat multiple times to form multiple groups of support seats, and then fix a film or cloth between the multiple groups of support seats to form an indoor space that can isolate the external environment, thereby constructing a supply shed or a planting shed applicable to cold and windy areas;

[0021] Compared with the prior art where only multiple regular-shaped support bars are directly placed to form a support base, in this device, the connection of multiple arc-shaped splicing rods 101 through the insertion fit of the splicing plate 102 and the splicing groove 103 makes the connection between the multiple arc-shaped splicing rods 101 tighter and the integrity stronger. As a result, the wind resistance effect is more excellent, and it is more suitable for the shed construction operation in cold and windy areas. Through the insertion connection of the splicing plate 102 and the splicing groove 103, the multiple arc-shaped splicing rods 101 are tightly connected to form a support base with stronger integrity. This mechanical biting design reduces the construction difficulty while dispersing the wind load pressure and avoiding the problem of insufficient wind resistance caused by loose connection of traditional regular support bars;

[0022] After subsequent welding and fixing the film or cloth to complete the construction, the multiple mutually spliced arc-shaped splicing rods 101 increase the contact surface with the film cloth, and the support for the film cloth is more stable. At the same time, the multiple arc-shaped splicing rods 101 can support the film or cloth and lift the film cloth. Since the weld between two arc-shaped splicing rods 101 is located at the joint position of the splicing plate 102 and the splicing groove 103, the vertical height of this position is lower than the height of the arc-shaped splicing rod 101. Therefore, after using the multiple arc-shaped splicing rods 101 to support the film cloth, the film cloth at the weld position will be suspended, so that the subsequent film cloth will not directly contact the top weld where the multiple arc-shaped splicing rods 101 are connected to each other, avoiding the situation that the weld is in direct contact with the rain and snow that may accumulate on the upper side of the film cloth for a long time, resulting in the weld cracking and affecting the subsequent support stability, and further being suitable for the shed construction in cold and windy areas;

[0023] After the shed is constructed in an outdoor environment where snow often falls, when there is sufficient indoor space, the vertical rod 203 can be connected to the moving block 201 by tightening the bolts. When too much snow accumulates on the upper side of the shed, the staff can hold the vertical rod 203 and move it, so that the moving block 201 slides in the sliding groove 109, and the moving block 201 gradually contacts the film cloth on the shed, applying a driving force to the snow blocks, so that the moving block 201 loosens the snow blocks on the upper side of the shed, and further adapts to the cold area with a large snowfall, avoiding the situation that the shed collapses due to excessive snow load. This ensures the stability of the shed construction. At the same time, the setting of the vertical rod 203 and the moving block 201 enables the staff to directly remove the snow at the highest position of the shed without using tools, avoiding the difficult situation of manual snow removal by the staff when the shed is relatively high, bringing convenience to the actual use and realizing manual pushing snow removal. This design avoids the high risk of traditional manual climbing

[0024] Furthermore, a rectangular block can be fixedly connected to the top of the vertical rod 203 by tightening bolts, and a groove is formed on the moving block 201. When it is necessary to operate the rotation of the moving block 201, the rectangular block at the top of the vertical rod 203 is inserted into the groove, so that the groove and the rectangular block are inserted and matched with each other. At this time, moving the vertical rod 203 can drive the moving block 201 to move and complete the driving operation. When not in use, the vertical rod 203 is directly moved downward, and the rectangular block is pulled out of the groove to complete the disassembly operation. Compared with the connection and driving method of tightening bolts, this driving structure is more simple and brings convenience to actual use;

[0025] Furthermore, a hanging plate can be connected to the vertical rod 203 by tightening bolts, so as to utilize the longer length of the vertical rod 203 for the hanging effect of items, which brings convenience to the actual use of the supply shed or the planting shed. For example, hooks are added in the supply shed to improve the storage flexibility, or supplementary lights are added in the planting shed to bring convenience to planting, thereby reducing the negative impact brought by the space occupied by the vertical rod 203. That is, the hanging function of the hanging plate can be extended to a tool storage rack to improve the space utilization rate;

[0026] When installing the moving block 201, the moving block 201 is installed in the sliding groove 109 through the assembly groove 105, and then the assembly groove 105 is filled with materials to avoid the moving block 201 slipping out of the assembly groove 105, ensuring the normal installation and sliding of the moving block 201. In the installation environment where snowfall is not frequent, the moving block 201 may not be installed.

[0027] It also includes a lever 202 fixedly connected to the moving block 201. A plurality of circular holes 104 are formed in the arc-shaped splicing rod 101 and the splicing plate 102. A plurality of connecting rods 604 are rotatably connected in the plurality of circular holes 104. A torsion spring is fixedly connected between the plurality of circular holes 104 and the plurality of connecting rods 604. A rotating rod 601 is fixedly connected to the connecting rod 604. A snow loosening plate 602 is fixedly connected to the rotating rod 601. A matching plate 603 is fixedly connected to the rotating rod 601. The lever 202 can move the matching plate 603. After the plurality of arc-shaped splicing rods 101 are spliced with each other, a plurality of rotating rods 601 are connected to the arc-shaped splicing rod 101 at the frontmost side.

[0028] When removing the accumulated snow, the moving moving block 201 will drive the lever 202 to move. When the lever 202 passes the position of a matching plate 603, it will drive the rotating rod 601 to rotate in the circular hole 104. At this time, the snow loosening plate 602 will move and then move the membrane cloth, thereby loosening the snow blocks outside the membrane cloth, thereby performing the snow removal operation on the area outside the support seat, expanding the scope of snow removal, and further avoiding the situation where the shed is overloaded due to excessive snow accumulation. After the lever 202 passes this position, the rotating rod 601 will be reset by the torsion force of the torsion spring, so as to facilitate the next moving operation.

[0029] At the same time, the plurality of rotating rods 601 can also support the tarpaulin, further preventing the tarpaulin from collapsing due to accumulated snow, and further adapting to the installation environment with frequent cold and snow.

[0030] Furthermore, different protrusions can be connected to the right side of the snow loosening board 602 by tightening bolts according to different membrane cloths, thereby effectively improving the effect of moving snow blocks on the membrane cloth and improving the purpose of snow removal while ensuring that the membrane cloth is not damaged by the moving operation;

[0031] Furthermore, in Example 1 of connecting the protrusions on the loose snow board 602:

[0032] When scraping snow from a shed built with elastic membrane cloth, a snow loosening board 602 with multiple wavy soft rubber protrusions can be used, so that the wavy soft rubber protrusions disperse the pressure through flexible contact to avoid scratching the surface of the elastic membrane cloth. It is suitable for planting shed membrane cloth that requires frequent snow removal.

[0033] Furthermore, in Example 2 of connecting the protrusions on the loose snow board 602:

[0034] When scraping snow against high-strength fiber membrane cloth, a snow loosening board 602 with multiple serrated metal protrusions can be used. The serrated edges can penetrate thick snow layers and enhance the ability to break hard snow blocks. The metal material has strong wear resistance and is suitable for high-frequency snow removal scenarios. At the same time, the tilt angle can be adjusted to 15°-30° to balance the cutting force and membrane cloth protection. Due to the high strength of carbon fiber or glass fiber, the serrated protrusions will not scratch the high-strength fiber membrane cloth during the shifting process, which can ensure that the membrane cloth will not tear under high-intensity shifting and maintain the subsequent shielding effect.

[0035] Furthermore, in Example 3 of connecting the protrusions on the loose snow board 602:

[0036] When snow scraping treatment is carried out on the permeable anti-seepage membrane cloth, a snow loosening plate 602 with a plurality of hemispherical hollow grid protrusions can be used, and a plurality of water permeable holes are provided on both the rotating rod 601 and the snow loosening plate 602, so that the contact area between the rotating rod 601, the snow loosening plate 602 and the hemispherical hollow grid protrusions is reduced, avoiding blocking the water permeable holes of the membrane cloth. At the same time, the design of the hollow grid and the water permeable holes allows snow water to penetrate, preventing water accumulation from increasing the load on the shed roof. It is applicable to agricultural planting sheds that need to balance snow removal and drainage, allowing snow water to penetrate and avoiding the membrane cloth from freezing and sticking due to water accumulation.

[0037] Furthermore, Embodiment 4 of connecting protrusions on the snow loosening plate 602:

[0038] When snow scraping treatment is carried out on the multi-layer composite membrane cloth, a snow loosening plate 602 with a plurality of stepped height-varying multi-level protrusions can be used, and the stepped height difference can be used to gradually stir at different snow depths, which is applicable to supply sheds with large snowfall in extreme snowfall environments.

[0039] During actual installation, regular cylindrical rods can be inserted into a plurality of round holes 104 at a lower height, that is, when the staff can manually perform snow removal operations, only cylindrical rods for support are set, reducing the operation cost of the equipment.

[0040] A circular groove 605 is provided at one end of each rotating rod 601 away from the connecting rod 604. A plurality of rotating rods 601 can be spliced and fixed with each other through the cooperation of the connecting rod 604 and the circular groove 605 on another rotating rod 601.

[0041] During construction, the connecting rod 604 on a plurality of independent rotating rods 601 can be inserted into the circular groove 605 on a plurality of rotating rods 601 in this application according to the snow removal requirements, and then Figure 2 the posture shown is formed, and fixed by tightening bolts or welding. Thus, when driving a certain rotating rod 601 to rotate subsequently, a plurality of rotating rods 601 spliced and fixed with this rotating rod 601 can rotate synchronously, thereby increasing the contact surface with the membrane cloth by increasing the number of snow loosening plates 602, further expanding the snow removal range, and further improving the supporting force for the membrane cloth, achieving the effect of avoiding the situation of the shed body collapsing due to excessive snow accumulation causing too heavy a load.

[0042] It also includes a connecting plate 106 fixedly connected to the arc-shaped splicing rod 101. An I-shaped frame 401 is detachably connected to the connecting plate 106 by bolts. A slider 402 is slidably connected to the I-shaped frame 401. A driving rod 403 is connected to the slider 402. The driving rod 403 can be inserted into the long groove of the vertical rod 203. A motor is fixedly connected to the I-shaped frame 401, and a lead screw is fixedly connected to the output shaft of the motor. The lead screw is in screw drive with the slider 402.

[0043] In actual use, if there is too much snow, which makes it impossible for the staff to manually pull the vertical rod 203 to slide, and the snow is still increasing and needs to be cleared in time to keep the shed stable, the I-frame 401 can be fixed to the connecting plate 106 by tightening the bolts, and the driving rod 403 can be inserted into the long groove of the vertical rod 203, and then the motor can be started, and then the motor can be used to drive the lead screw to rotate, so that the lead screw transmission slider 402 can slide on the I-frame 401, and then the driving rod 403 can be used to move the vertical rod 203, so that the moving block 201 can slide in the slide groove 109, so as to complete the snow removal effect by electric drive, and avoid the situation that the normal operation of the snow removal function is affected when there is insufficient manpower;

[0044] When not in use, the work frame 401 can be disassembled by loosening the bolts to expand the usable space in the shed.

[0045] After the I-frame 401 is disassembled, it can be converted into a temporary support frame for the shed through bolts, that is, the I-frame 401 is vertically fixed to the connecting plate 106, and a telescopic support is installed on the top to support the weak area of the shed roof. At the same time, the driving rod 403 can be slid upward to expand the support area to cope with extreme loads of heavy snow.

[0046] It also includes a disc plate 404 fixedly connected to the driving rod 403. The driving rod 403 is slidably connected to the slider 402 through a notch. A compression spring is fixedly connected between the disc plate 404 and the slider 402.

[0047] Before using the driving rod 403 for electric drive operation, after connecting the work frame 401 to the connecting plate 106 by tightening the bolts, manually pull the disc plate 404 to stagger the front end of the driving rod 403 with the vertical rod 203, and then move the slider 402 until the driving rod 403 can be inserted into the long groove position of the vertical rod 203, and then remove the force of pulling the disc plate 404, so that the compression spring drives the driving rod 403 to reset, and then insert the driving rod 403 into the long groove, and then move the slider 402 to smoothly perform subsequent electric drive operations. The slidable setting of the driving rod 403 can effectively facilitate subsequent installation operations and facilitate actual use.

[0048] The matching balls 108 are fixedly connected to half of the multiple arc surface splicing rods 101, and the spherical shell parts 301 are rotatably connected to the other half of the multiple arc surface splicing rods 101. The multiple matching balls 108 can be buckled with the multiple spherical shell parts 301.

[0049] After the arc surface splicing rods 101 are spliced together through the cooperation between the arc surface splicing rods 101 and the splicing grooves 103 and symmetrically arranged, the matching ball 108 of the arc surface splicing rod 101 within the symmetrical arrangement range can be inserted into the ball shell part 301 on another arc surface splicing rod 101 for buckling, formingFigure 6 The posture shown is then fixed to the mating ball 108 and the spherical shell portion 301, so that the two arc-shaped splicing rods 101 arranged symmetrically can also be stably connected to each other, further increasing the stability and integrity of the support base formed by multiple subsequent arc-shaped splicing rods 101, improving the wind resistance effect, and being applicable to cold and windy areas.

[0050] At the same time, the rotatable setting of the spherical shell portion 301 enables the spherical shell portion 301 and the mating ball 108 to be engaged with each other even if the installation bottom surface is uneven, causing the two arc-shaped splicing rods 101 arranged symmetrically to tilt, by means of adaptively rotating the spherical shell portion 301, so that the connection effect can still be completed, adapting to the complex installation environment in the actual use process.

[0051] A scale disk is fixedly connected to the outside of the spherical shell portion 301.

[0052] The adaptively rotating situation of the spherical shell portion 301 can be read through the scale disk, so as to judge the inclination degree of the arc-shaped splicing rods 101 arranged symmetrically. When the inclination degree of the arc-shaped splicing rods 101 is too large to ensure the flatness of the subsequent shed body construction, the soil on this side of the ground is filled or excavated to ensure the construction effect of the subsequent shed body.

[0053] It further includes a fixing rod 501. A round hole is opened on the mating ball 108. The fixing rod 501 can be inserted into the round hole. Threads 504 are provided on the fixing rod 501, and corresponding thread grooves are provided in the round hole. The fixing rod 501 can be screwed into the mating ball 108 through the cooperation of the threads 504 and the thread grooves. A fixing plate A 502 and a fixing plate B 503 are fixedly connected to the fixing rod 501. The fixing plate A 502 can be pressed against the spherical shell portion 301, and the fixing plate B 503 can be pressed against the scale disk.

[0054] After the mating ball 108 and the spherical shell portion 301 are spliced with each other, the fixing rod 501 is sent into the mating ball 108 and continuously rotated, so that the fixing plate A 502 and the fixing plate B 503 on the fixing rod 501 are respectively pressed against the spherical shell portion 301 and the scale disk, and then the buckled spherical shell portion 301 is fixed, so that the two arc-shaped splicing rods 101 can be stably spliced, and the effect of forming the subsequent support base is completed.

[0055] It further includes a rectangular block 505 fixedly connected to the fixing rod 501. A rectangular groove 506 is opened on the fixing rod 501. Multiple fixing rods 501 can be connected to each other through the cooperation of the rectangular block 505 and the rectangular groove 506.

[0056] After multiple rows of arc-shaped splicing rods 101 are spliced with each other through the mutual cooperation of the arc-shaped splicing rods 101 and the splicing grooves 103 to form Figure 1In the shown posture, a rectangular block 505 on a fixed rod 501 will be inserted into a rectangular groove 506 on another fixed rod 501. Subsequently, by turning one fixed rod 501, multiple interconnected fixed rods 501 can be rotated synchronously, so as to synchronously complete the subsequent extrusion and fixing effect of the multiple fixed rods 501, thus eliminating the need for multiple turning operations and bringing convenience to actual use.

[0057] On multiple arc surface splicing rods 101 fixedly connected with fitting balls 108, top frames 107 are rotatably connected. Through holes capable of inserting round tubes are formed in the top frames 107.

[0058] After the construction is completed, round tubes can be inserted into the top frames 107 of multiple support seats, so as to support the uppermost side of the shed body, making the uppermost side of the shed body have a larger inclination angle and further preventing snow blocks from accumulating.

[0059] During actual construction, if the construction ground is inclined, resulting in the construction height of multiple arc surface splicing rods 101 with spherical shell parts 301 being lower than that of multiple arc surface splicing rods 101 with fitting balls 108, and when the spherical shell parts 301 rotate adaptively on the arc surface splicing rods 101, if the shed body is directly constructed at this time, it will cause snow blocks to be more likely to accumulate on the lower side during subsequent snowfall weather, resulting in more serious stress on the lower side and affecting the subsequent structural stability. Therefore, when the above situation occurs, the top frame 107 can be operated to rotate on the arc surface splicing rod 101, thereby changing the slope of the top frame 107, making the top frame 107 tilt towards the splicing rod 101 on the lower side, so that the inclination angle formed by the top frame 107 and the splicing rod 101 on the higher side is greater than the inclination angle formed by the top frame 107 and the splicing rod 101 on the lower side, so that part of the snow blocks that would originally fall on the membrane of the splicing rod 101 on the lower side will be guided to the splicing rod 101 on the higher side. After the subsequent membrane is constructed, the snow blocks will be guided as much as possible towards the direction of the fitting ball 108 by the membrane at the top frame 107, avoiding serious unilateral stress and affecting the structural stability.

Claims

1. An assembled steel structure, characterized in that, It includes an arc-shaped splicing rod, on which a splicing plate is fixedly connected. A splicing groove is formed on the arc-shaped splicing rod. Multiple arc-shaped splicing rods can be inserted and spliced side by side with each other through the cooperation of the splicing plate and the splicing groove. A sliding groove is formed on the splicing plate, and a moving block is slidably connected in the sliding groove. A vertical rod is connected to the moving block.

2. The prefabricated steel structure according to claim 1, wherein, It further includes a shifting rod fixedly connected to the moving block. Multiple circular holes are formed in the arc-shaped splicing rod and the splicing plate. Multiple connecting rods are rotatably connected in the multiple circular holes. Torsion springs are fixedly connected between the multiple circular holes and the multiple connecting rods. A rotating rod is fixedly connected to the connecting rod. A snowboard is fixedly connected to the rotating rod. A matching plate is fixedly connected to the rotating rod. The shifting rod can shift the matching plate to move.

3. An assembled steel structure according to claim 2, characterized in that, A circular groove is formed on each of the rotating rods. Multiple rotating rods can be inserted into each other through the cooperation of the connecting rod and the circular groove.

4. A prefabricated steel structure according to claim 3, characterized in that, It further includes a connecting plate fixedly connected to the arc-shaped splicing rod. An I-shaped frame is detachably connected to the connecting plate through bolts. A slider is slidably connected to the I-shaped frame. A driving rod is connected to the slider. The driving rod can be inserted into the long groove of the vertical rod.

5. An assembled steel structure according to claim 4, characterized in that, It further includes a circular plate fixedly connected to the driving rod. The circular plate is slidably connected to the slider.

6. A prefabricated steel structure according to claim 1, characterized in that Half of the multiple arc-shaped splicing rods are fixedly connected with matching balls, and the other half of the multiple arc-shaped splicing rods are rotatably connected with spherical shell parts.

7. An assembled steel structure according to claim 6, characterized in that, A scale disk is fixedly connected to the outside of the spherical shell part.

8. An assembled steel structure according to claim 7, characterized in that, It further includes a fixing rod. A circular hole is formed on the matching ball. The fixing rod can be inserted into the circular hole. Threads are provided on the fixing rod, and corresponding thread grooves are provided in the circular hole. The fixing rod can be screwed into the matching ball through the cooperation of the thread and the thread groove. A fixing plate A and a fixing plate B are fixedly connected to the fixing rod. The fixing plate A can press against the spherical shell part, and the fixing plate B can press against the scale disk.

9. A prefabricated steel structure according to claim 8, characterized in that, It further includes a rectangular block fixedly connected to the fixing rod. A rectangular groove is formed on the fixing rod. Multiple fixing rods can be connected to each other through the cooperation of the rectangular block and the rectangular groove.

10. A prefabricated steel structure according to claim 9, characterized in that, A top frame is rotatably connected to each of the arc-shaped splicing rods fixedly connected with matching balls.

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