An assembled steel beam system

Abstract

The application relates to the technical field of steel beam structures, in particular to a spliced steel beam system which comprises a steel beam and a concrete slab, the concrete slab is provided with a plurality of drill holes, and a pre-packaged chemical anchoring agent is arranged in the drill holes; the front and rear ends of the steel beam are each provided with a plurality of through holes, the through holes and the drill holes are in one-to-one correspondence; the spliced steel beam system further comprises an open-close clamping unit, the open-close clamping unit is provided with a plurality of clamping cavities, a welding pin is slidably arranged in the clamping cavities in the vertical direction, and the welding pin is used for being inserted into the corresponding through hole and drill hole; the open-close clamping unit has two states of opening and closing, when the open-close clamping unit is in the closing state, the clamping cavities clamp the welding pins, and the welding pins remain stable without external force; when the open-close clamping unit is in the opening state, the clamping cavities are exposed to gaps, so that the open-close clamping unit can slide away from the welding pins in the horizontal direction. The application can reduce the labor intensity of workers and improve the splicing efficiency of the steel beam structure.

Description

Technical Field

[0001] This application relates to the technical field of steel beam structures, and in particular to a modular steel beam system. Background Technology

[0002] Precast steel-concrete composite beams offer advantages such as high overall and local stiffness, low steel consumption, transparent structure, and convenient construction. They are composite structures formed by connecting steel beams and concrete slabs using shear studs. Shear studs possess superior ductility and toughness, are easy to install, can be mass-produced in factories, and offer excellent economic and practical benefits.

[0003] However, in areas with complex stress, shear keys composed of a large number of welded studs are needed to ensure the effective transmission of internal forces. However, the welded studs need to be welded and installed one by one after the steel beam and concrete slab are assembled. Since the steel beam is located at a high position and the welded studs are densely distributed, workers need to work at height for a long time, which is labor-intensive and affects the assembly efficiency of the steel beam structure. Therefore, improvements are needed. Summary of the Invention

[0004] In order to reduce the labor intensity of workers and improve the assembly efficiency of steel beam structures, this application provides a modular steel beam system.

[0005] This application provides a prefabricated steel beam system, which adopts the following technical solution: a prefabricated steel beam system, including a steel beam and a concrete slab, wherein the concrete slab is provided with a plurality of drill holes, the drill holes being filled with pre-packaged chemical anchoring agent; both the front and rear ends of the steel beam are provided with a plurality of through holes, the through holes corresponding one-to-one with the drill holes;

[0006] It also includes an opening and closing clamping unit, which has several clamping cavities. Welding studs slide through the clamping cavities in the vertical direction and are used to be inserted into corresponding through holes and drilled holes.

[0007] The opening and closing clamping unit has two states: open and closed. When the opening and closing clamping unit is in the closed state, the clamping cavity will clamp the welding stud, and the welding stud will remain stable when no external force is applied. When the opening and closing clamping unit is in the open state, the clamping cavity will expose a notch, allowing the opening and closing clamping unit to slide horizontally and disengage from the welding stud.

[0008] Optionally, the steel beam includes an upper flange and a lower flange of the main steel beam arranged at intervals, the upper flange and the lower flange of the main steel beam are connected by the web of the main steel beam, and the web of the main steel beam is provided with longitudinal stiffening ribs and transverse connecting systems arranged in a cross pattern.

[0009] Optionally, the web of the steel main beam is provided with a number of shear studs arranged in a uniform manner, with a longitudinal spacing of 150mm and a transverse spacing of 250mm between two adjacent shear studs.

[0010] Optionally, the opening and closing clamping unit includes a mounting base, on which are provided two clamping plates and several clamping components arranged sequentially in the horizontal direction. The two clamping plates are used to jointly clamp the web of the steel main beam.

[0011] The clamping assembly includes two sliding seats that are slidably connected to the mounting base in a horizontal direction. The sliding seats are provided with fixed welding studs. When the fixed welding studs on the two sliding seats are closed, they will together form multiple clamping cavities.

[0012] When two clamping plates are clamped together on the web of the steel main beam, and the mounting base abuts against the end face of the web of the steel main beam, the clamping cavity will correspond to the through hole and the drilled hole.

[0013] Optionally, all the sliding seats are connected to the same pull plate by a pull rope. The pull plate will pull the sliding seats to move by the pull rope, so that the two fixed welding stud clamps in the clamping assembly are separated from each other.

[0014] The sliding seat is connected to the mounting base via a first spring. When the first spring is in its natural state, the two fixed welding stud clamps in the clamping assembly will close together.

[0015] Optionally, a sliding welding stud clamp is slidably connected to the sliding seat in the vertical direction. After the two sliding welding stud clamps on the two sliding seats are closed, they will also form multiple clamping cavities. The clamping cavity formed by the two sliding welding stud clamps and the clamping cavity formed by the two fixed welding stud clamps are located on the same vertical plane.

[0016] Optionally, when the sliding stud clamp is located below the fixed stud clamp, the sliding stud clamp will slide away from the fixed stud clamp due to its own gravity.

[0017] Optionally, a lifting seat is slidably connected to the mounting base in the vertical direction. The movement trajectory of the lifting seat is offset from that of the clamping plate. A push plate is rotatably connected to the lifting seat. The push plate and the lifting seat are connected to the same torsion spring. The sliding welding stud clamp is located between the fixed welding stud clamp and the push plate.

[0018] When the lifting seat slides away from the fixed welding nail clamp due to its own weight, the torsion spring will be in its natural state, the push plate will be in a horizontal state and lift the head of the welding nail in the clamping cavity, and the tail of the welding nail will protrude upward from the fixed welding nail clamp.

[0019] Optionally, the mounting base is provided with a support rod. When both the sliding welding stud clamp and the lifting seat slide to the fixed welding stud clamp, the support rod will push the push plate to flip upward, so that the push plate is disengaged from directly above the clamping cavity.

[0020] Optionally, the mounting base is provided with a first baffle, and the push plate is located between the first baffle and the fixed welding stud clamp; when the push plate is in a horizontal state and supports the welding stud head in the clamping cavity, the first baffle will support the lower surface of the push plate.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] 1. Before the welding studs are installed, the opening and closing clamping unit is in the closed state, allowing the welding studs to be inserted vertically downwards into the clamping cavity. The clamping cavity holds the welding studs, which remain stable when no external force is applied, thus enabling the pre-installation of multiple welding studs. During the installation of the welding studs, the worker moves the opening and closing clamping unit to the concrete slab, aligning the clamping cavity with the through hole and the drilled hole. At this point, the worker can push the welding studs, inserting all the welding studs into the corresponding through hole and drilled hole. Afterward, the worker switches the opening and closing clamping unit to the open state, exposing the notch in the clamping cavity, allowing the opening and closing clamping unit to slide horizontally away from the welding studs. This application enables the pre-installation of welding studs, allowing for quick and accurate installation in subsequent processes, shortening the time workers spend working at heights, reducing the labor intensity of workers, and improving the assembly efficiency of steel beam structures.

[0023] 2. When the welding stud needs to be installed, the sliding welding stud clamp will descend to its lowest position. The head of the welding stud will be clamped by the sliding welding stud clamp, and the tail of the welding stud will be clamped by the fixed welding stud clamp. The tail of the welding stud will protrude upward from the fixed welding stud clamp. The vertical distance between the fixed welding stud clamp and the sliding welding stud clamp is increased, thus ensuring the verticality of the welding stud before installation.

[0024] 3. During the installation of the welding studs, the worker will push the push plate upwards. The push plate will push all the welding studs and all the sliding welding stud clamps upwards. As the sliding welding stud clamps rise, they will work together with the fixed welding stud clamps to ensure the verticality of the welding studs, so that each welding stud is accurately inserted into the corresponding drill hole, thereby improving the installation efficiency of the welding studs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of the upper flange of the steel main beam and the concrete slab in Embodiment 1 of this application;

[0027] Figure 3 This is a schematic diagram of the overall structure in Embodiment 2 of this application;

[0028] Figure 4 This is a structural schematic diagram of the upper flange of the steel main beam, the web of the steel main beam, and the mounting base in Embodiment 2 of this application;

[0029] Figure 5This is a schematic diagram of the clamping assembly and pull plate in Embodiment 2 of this application;

[0030] Figure 6 This is a schematic diagram of the clamping assembly and push plate in Embodiment 2 of this application;

[0031] Figure 7 This is a schematic diagram of the clamping component in Embodiment 2 of this application;

[0032] Figure 8 This is a schematic diagram of the structure when the welding studs are pre-installed in Embodiment 2 of this application;

[0033] Figure 9 This is a schematic cross-sectional view of the overall structure in Embodiment 2 of this application.

[0034] Reference numerals: 1. Steel beam; 11. Upper flange of steel main beam; 111. Through hole; 12. Lower flange of steel main beam; 13. Web of steel main beam; 14. Longitudinal stiffener; 15. Transverse connection system; 16. Shear stud; 2. Concrete slab; 21. Drill hole; 22. Pre-packaged chemical anchoring agent; 3. Weld stud; 4. Mounting seat; 41. Clamping plate; 42. Clamping assembly; 421. Sliding seat; 422. Fixed weld stud clamp; 423. First spring; 424. Sliding weld stud clamp; 43. Lifting seat; 431. Push plate; 432. Torsion spring; 433. First baffle; 434. Second baffle; 44. Support rod; 45. Handle; 46. Pull plate; 47. Pull rope; 48. Guide wheel; 49. Second spring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0036] Example 1

[0037] This application discloses an assembly-type steel beam system. For example... Figure 1 and Figure 2 As shown, a prefabricated steel beam system includes a steel beam 1 and a concrete slab 2. The concrete slab 2 is 0.25m thick, with a 10mm wide gap between segments. Horizontally arranged reinforcing bars with a diameter of 20mm and a spacing of 1250mm are pre-embedded inside the concrete slab 2. The steel beam 1 is an I-beam, including an upper flange 11 and a lower flange 12 of the main steel beam, which are arranged vertically and are connected by a web 13. The upper flange 11 has a width of 600mm and a thickness of 25mm or 40mm. The lower flange 12 has a width of 800mm and a thickness of 30mm, 40mm, or 50mm. The web 13 of the main steel beam has a height of 2750mm and a thickness of 20mm.

[0038] The web plate 13 of the steel main beam is welded with longitudinal stiffening ribs 14 and transverse connecting system 15 arranged in a cross pattern. The longitudinal stiffening ribs 14 are divided into two types: 160mm wide and 16mm thick, and 200mm wide and 20mm thick. Both the longitudinal stiffening ribs 14 and the transverse connecting system 15 are set every 5m along the length of the web plate 13 of the steel main beam.

[0039] Several shear studs 16 are installed at both the front and rear ends of the web plate 13 of the steel main beam. The longitudinal spacing between two adjacent shear studs 16 is 150mm and the transverse spacing is 250mm.

[0040] The lower surface of the concrete slab 2 is provided with several drilled holes 21, which are filled with pre-packaged chemical anchoring agents 22, such as epoxy resin and vinyl ester adhesive. The front and rear ends of the upper flange 11 of the steel main beam are provided with several through holes 111, which correspond one-to-one with the drilled holes 21. The same welding stud 3 is inserted into the corresponding through hole 111 and drilled hole 21. The diameter of the welding stud 3 is 22mm. The welding studs 3 are evenly distributed and the distance between two adjacent welding studs 3 is 200mm. The welding stud 3 can pass through the through hole 111 and be inserted into the drilled hole 21. The tail of the welding stud 3 can pierce the pre-packaged chemical anchoring agent 22, so that the welding stud 3 is bonded in the drilled hole 21 to achieve the connection between the steel beam 1 and the concrete slab 2.

[0041] It is worth noting that the through hole 111 on the upper flange 11 of the steel main beam is machined, and the drill hole 21 on the concrete slab 2 needs to be drilled using an electric hammer or diamond drill bit. After drilling the hole 21, an air pump or brush should be used to remove the dust inside the hole 21 to ensure that the hole wall is clean in order to improve the bonding strength of the anchoring agent. The diameter of the hole 21 is 2-4mm larger than the diameter of the welding stud 3, and the depth of the hole 21 is 1.5-2 times the embedment depth of the welding stud 3.

[0042] After the welding stud 3 is installed, a pull-out test is required to verify whether the anchoring force of the welding stud 3 meets the design requirements. Specifically, the sampling test load value should not be less than 1.3 times the design value.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that this embodiment also includes an opening and closing clamping unit for assisting in the installation of welding studs 3.

[0045] like Figure 3 and Figure 4As shown, the opening and closing clamping unit has several clamping cavities and can be in two states: open and closed. Before the welding studs 3 are installed, the opening and closing clamping unit is in the closed state, and the welding studs 3 can be inserted vertically downward into the clamping cavities. The clamping cavities will hold the welding studs 3, and the welding studs 3 will remain stable when no external force is applied, thus achieving the pre-installation of multiple welding studs 3. During the installation of the welding studs 3, the worker will move the opening and closing clamping unit to the concrete slab 2, so that the clamping cavities correspond to the through holes 111 and the drill holes 21. At this time, the worker can push the welding studs 3 so that all the welding studs 3 are inserted into the corresponding through holes 111 and drill holes 21. Afterwards, the worker will switch the opening and closing clamping unit to the open state, at which time the clamping cavities will expose notches, allowing the opening and closing clamping unit to slide horizontally and disengage from the welding studs 3.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, the opening and closing clamping unit includes a mounting base 4, on which two clamping plates 41 are mounted. The two clamping plates 41 are used to clamp the web plate 13 of the steel main beam, so that the mounting base 4 can rise stably along the surface of the web plate 13 of the steel main beam. When the two clamping plates 41 are clamped together on the web plate 13 of the steel main beam, and the mounting base 4 abuts against the end face of the web plate 13 of the steel main beam, the clamping cavity will correspond to the through hole 111 and the drill hole 21, so that the welding studs 3 on the opening and closing clamping unit can be accurately inserted into the corresponding through hole 111 and drill hole 21.

[0047] like Figure 5 and Figure 6 As shown, the mounting base 4 is provided with a number of clamping components 42 arranged in a horizontal direction. The clamping components 42 include two sliding seats 421. A first dovetail block is installed on the sliding seat 421. The mounting base 4 is provided with a first dovetail groove that is set horizontally. The first dovetail block slides into the first dovetail groove, realizing the sliding connection between the sliding seat 421 and the mounting base 4.

[0048] A fixed welding stud clamp 422 is installed on the sliding seat 421. The sliding seat 421 is connected to the mounting seat 4 via a first spring 423. One end of the first spring 423 is fixedly connected to a first dovetail block on the sliding seat 421, and the other end of the first spring 423 is fixedly connected to the mounting seat 4. When the first spring 423 is in its natural state, the two fixed welding stud clamps 422 in the clamping assembly 42 will close together and form multiple clamping cavities. At this time, the welding studs 3 can be pre-installed in each clamping cavity.

[0049] The sliding seat 421 is provided with a sliding welding stud clip 424, and a second dovetail block is installed on the sliding welding stud clip 424. The sliding seat 421 is provided with a second dovetail groove extending in the vertical direction. The second dovetail block is slidably embedded in the second dovetail groove, realizing the sliding connection between the sliding welding stud clip 424 and the sliding seat 421.

[0050] When the two sliding seats 421 are in contact with each other, causing the two fixed welding stud clamps 422 to close together, the sliding welding stud clamps 424 on the two sliding seats 421 will also close together and form multiple clamping cavities. The clamping cavities formed by the two sliding welding stud clamps 424 and the clamping cavities formed by the two fixed welding stud clamps 422 are located on the same vertical plane, which increases the clamping area of ​​the welding stud 3, thereby ensuring the verticality of the welding stud 3 when it is clamped, so that the welding stud 3 can be accurately inserted into the through hole 111 and the drill hole 21.

[0051] like Figure 7 and Figure 8 As shown, it is worth noting that during the pre-installation of the welding stud 3, the sliding welding stud clamp 424 will be positioned above the fixed welding stud clamp 422. At this time, the sliding welding stud clamp 424 will be pressed against the fixed welding stud clamp 422 due to its own weight, so that the welding stud 3 can pass through the clamping cavity formed by the two sliding welding stud clamps 424 and the clamping cavity formed by the two fixed welding stud clamps 422 in sequence.

[0052] When the welding stud 3 needs to be installed, the worker will invert the mounting base 4 so that the sliding welding stud clamp 424 is below the fixed welding stud clamp 422. At this time, the sliding welding stud clamp 424 will slide down away from the fixed welding stud clamp 422 due to its own gravity. During the downward movement, the sliding welding stud clamp 424 will press down on the head of the welding stud 3, causing the welding stud 3 to descend. When the sliding welding stud clamp 424 descends to its lowest state, the head of the welding stud 3 will be clamped by the sliding welding stud clamp 424, and the tail of the welding stud 3 will be clamped by the fixed welding stud clamp 422. The tail of the welding stud 3 will protrude upward from the fixed welding stud clamp 422 to ensure the stability of the welding stud 3 before installation. In addition, since the vertical distance between the fixed welding stud clamp 422 and the sliding welding stud clamp 424 is increased, the verticality of the welding stud 3 before installation is ensured.

[0053] like Figure 5 and Figure 6 As shown, the mounting base 4 is provided with a lifting seat 43, and a third dovetail block is installed on the lifting seat 43. The mounting base 4 is provided with a third dovetail groove extending in the vertical direction. The third dovetail block is slidably embedded in the third dovetail groove, realizing the sliding connection between the lifting seat 43 and the mounting base 4. The movement trajectory of the lifting seat 43 is offset from that of the clamping plate 41, so that the lifting seat 43 will not collide with the clamping plate 41 during the lifting process.

[0054] like Figure 5 and Figure 8As shown, two push plates 431 are rotatably connected to the lifting seat 43. The push plates 431 can be flipped on the vertical plane. The sliding welding stud clamp 424 is located between the fixed welding stud clamp 422 and the push plate 431. The push plate 431 and the lifting seat 43 are connected to the same torsion spring 432. One end of the torsion spring 432 is fixedly connected to the push plate 431, and the other end of the torsion spring 432 is fixedly connected to the lifting seat 43.

[0055] When the sliding welding stud clamp 424 descends to its lowest position, the lifting seat 43 will also descend to its lowest position due to its own weight. At this time, the torsion spring 432 will be in its natural state, and the push plate 431 will be in a horizontal state and lift the head of the welding stud 3 in the clamping cavity to prevent the welding stud 3 from being shaken off the clamping cavity due to rapid descent, thereby improving the stability of the welding stud 3 before installation.

[0056] During the installation of the welding studs 3, the worker will push the two push plates 431 upwards. The push plates 431 will push all the welding studs 3 and all the sliding welding stud clamps 424 upwards. As the sliding welding stud clamps 424 rise, they will work together with the fixed welding stud clamps 422 to ensure the verticality of the welding studs 3, so that each welding stud 3 is accurately inserted into the corresponding drill hole 21, thereby improving the installation efficiency of the welding studs 3.

[0057] A first baffle 433 is installed on the mounting base 4, and a push plate 431 is located between the first baffle 433 and the fixed welding stud clamp 422. When the push plate 431 is in a horizontal state and supports the head of the welding stud 3 in the clamping cavity, the first baffle 433 will support the lower surface of the push plate 431, so that the first baffle 433 can stably support the push plate 431. At this time, the push plate 431 cannot be flipped downward, thereby improving the support effect of the push plate 431 on the head of the welding stud 3.

[0058] A second baffle 434 is installed on the lifting seat 43, and a push plate 431 is located between the first baffle 433 and the second baffle 434. When the push plate 431 is in a horizontal state, the second baffle 434 will abut against the upper surface of the push plate 431. Therefore, during the process of the push plate 431 pushing the welding stud 3 upward, the push plate 431 will not be able to flip upward, so as to ensure that the push plate 431 can push the welding stud 3 vertically upward and insert it into the drill hole 21.

[0059] Two support rods 44 are installed on the mounting base 4, and the two support rods 44 are respectively located at the left and right ends of the lifting base 43. During the pre-installation of the welding stud 3, the sliding welding stud clamp 424 will press against the fixed welding stud clamp 422 due to its own weight, and the lifting base 43 will slide down and approach the sliding welding stud clamp 424 due to its own weight. At this time, the support rods 44 will abut against the lower surface of the push plate 431, and the push plate 431 will flip upward. The torsion spring 432 will deform, and the push plate 431 will be disengaged from the top of the clamping cavity to avoid the push plate 431 affecting the pre-installation of the welding stud 3 in the clamping cavity. When the mounting base 4 is inverted, the lifting base 43 will slide down and move away from the fixed welding stud clamp 422 due to its own weight. The torsion spring 432 will gradually return to its natural state and cause the push plate 431 to flip to a horizontal state so that the push plate 431 can support the head of the welding stud 3 in the subsequent process.

[0060] like Figure 4 , Figure 5 and Figure 9 As shown, a semi-circular handle 45 is installed on the mounting base 4. All sliding seats 421 are connected to the same pull plate 46 via a pull rope 47. The pull plate 46 is connected to the mounting base 4 via a second spring 49. One end of the second spring 49 is fixedly connected to the pull plate 46, and the other end of the second spring 49 is fixedly connected to the mounting base 4. Several guide wheels 48 are rotatably connected to the mounting base 4, and the pull rope 47 passes around the guide wheels 48. When the welding stud 3 is inserted into the drill hole 21, the worker holds the handle 45 with one hand and pulls the pull plate 46 away from the mounting base 4 with the other hand. The pull plate 46 will pull the sliding seat 421 to move via the pull rope 47, so that the two fixed welding stud clamps 422 and the two movable welding stud 3 clamps in the clamping assembly 42 are separated from each other. At this time, the clamping cavity will expose a notch, so that the opening and closing clamping unit can slide horizontally and disengage from the welding stud 3.

[0061] The implementation principle of the prefabricated steel beam system in this application embodiment is as follows: After the steel beam 1 is connected to the concrete slab 2, the worker will pre-install the welding studs 3. The sliding welding stud clamp 424 will press against the fixed welding stud clamp 422, and the support rod 44 will push the push plate 431 to flip up, so that the push plate 431 is disengaged from the top of the clamping cavity. At this time, the worker can insert the welding studs 3 one by one into the clamping cavity.

[0062] After the welding studs 3 are pre-installed, the worker will invert the mounting base 4, and the lifting base 43 will slide down to the lower end of the mounting base 4. The first baffle 433 will support the push plate 431, and the sliding welding stud clamp 424 will slide down away from the fixed welding stud clamp 422, so that the head of the welding stud 3 is pressed against the push plate 431. Then the worker will move the mounting base 4 so that the two clamping plates 41 are clamped together on the web plate 13 of the steel main beam, and the mounting base 4 will abut against the end face of the web plate 13 of the steel main beam. At this time, the clamping cavity will correspond to the through hole 111 and the drill hole 21. Then the worker will push the push plate 431 upward, and the push plate 431 will push all the welding studs 3 upward, so that each welding stud 3 is accurately inserted into the corresponding drill hole 21 and pierces the pre-packaged chemical anchoring agent 22. The welding stud 3 will be bonded in the drill hole 21 to achieve the connection between the steel beam 1 and the concrete slab 2.

[0063] Finally, the worker will release the push plate 431, and the lifting seat 43 will fall back to its original position due to its own weight. The worker will hold the handle 45 with one hand and pull the pull plate 46 away from the mounting seat 4 with the other hand. The pull plate 46 will pull the sliding seat 421 through the pull rope 47, so that the two fixed welding nail clips 422 and the two movable welding nail clips 3 in the clamping assembly 42 will separate from each other. At this time, the clamping cavity will expose the notch, so that the opening and closing clamping unit can slide and disengage from the welding nail 3 in the horizontal direction.

[0064] In summary, this application enables the pre-installation of welding studs 3, allowing the welding studs 3 to be installed quickly and accurately in subsequent processes, shortening the time workers spend working at heights, reducing the labor intensity of workers, and improving the assembly efficiency of the steel beam 1 structure.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prefabricated steel beam system, comprising steel beams (1) and concrete slabs (2), characterized in that: It also includes an opening and closing clamping unit. The concrete slab (2) is provided with several drill holes (21), and the drill holes (21) are filled with pre-packaged chemical anchoring agent (22). The front and rear ends of the steel beam (1) are provided with several through holes (111), and the through holes (111) correspond one-to-one with the drill holes (21). The steel beam (1) includes an upper flange (11) and a lower flange (12) of the main steel beam, which are arranged at intervals. The upper flange (11) and the lower flange (12) of the main steel beam are connected by a web plate (13) of the main steel beam. The web plate (13) of the main steel beam is provided with longitudinal stiffening ribs (14) and transverse connecting system (15) arranged in a cross shape. The opening and closing clamping unit includes a mounting base (4), a clamping plate (41) and a clamping assembly (42). The clamping assembly (42) is provided with several clamping cavities. Welding studs (3) are slidably inserted in the clamping cavities along the vertical direction. The welding studs (3) are used to be inserted into the corresponding through holes (111) and drill holes (21). The opening and closing clamping unit has two states: open and closed. When the opening and closing clamping unit is in the closed state, the clamping cavity will clamp the welding stud (3), and the welding stud (3) will remain stable when there is no external force. When the opening and closing clamping unit is in the open state, the clamping cavity will expose the notch, so that the opening and closing clamping unit can slide and disengage from the welding stud (3) in the horizontal direction. The opening and closing clamping unit works in conjunction with the steel beam (1) and the concrete slab (2) to achieve the pre-installation, alignment and rapid installation of the welding studs (3); The mounting base (4) is provided with two clamping plates (41) and several clamping components (42) arranged in the horizontal direction. The two clamping plates (41) are used to clamp the web plate (13) of the steel main beam. The clamping assembly (42) includes two sliding seats (421) that are slidably connected to the mounting base (4) in the horizontal direction. The sliding seats (421) are provided with fixed welding stud clips (422). When the two sliding seats (421) are closed, the fixed welding stud clips (422) together form multiple clamping cavities. When the two clamping plates (41) are clamped together on the web of the steel main beam (13) and the mounting base (4) abuts against the end face of the web of the steel main beam (13), the clamping cavity will correspond to the through hole (111) and the drill hole (21). All of the sliding seats (421) are connected to the same pull plate (46) by pull rope (47). The pull plate (46) will pull the sliding seat (421) to move by pull rope (47), so that the two fixed welding studs (422) in the clamping assembly (42) are separated from each other. The sliding seat (421) is connected to the mounting seat (4) via the first spring (423). When the first spring (423) is in its natural state, the two fixed welding studs (422) in the clamping assembly (42) will close together. The sliding seat (421) is slidably connected to a sliding welding stud clamp (424) in the vertical direction. After the two sliding seats (421) are closed, the sliding welding stud clamps (424) will also form multiple clamping cavities. The clamping cavity formed by the two sliding welding stud clamps (424) and the clamping cavity formed by the two fixed welding stud clamps (422) are located on the same vertical plane. When the sliding stud clip (424) is located below the fixed stud clip (422), the sliding stud clip (424) will slide away from the fixed stud clip (422) due to its own gravity. The mounting base (4) is slidably connected to a lifting seat (43) in the vertical direction. The movement trajectory of the lifting seat (43) is offset from that of the clamping plate (41). A push plate (431) is rotatably connected to the lifting seat (43). The push plate (431) and the lifting seat (43) are connected to the same torsion spring (432). The sliding welding stud clamp (424) is located between the fixed welding stud clamp (422) and the push plate (431). When the lifting seat (43) slides away from the fixed welding nail clamp (422) due to its own weight, the torsion spring (432) will be in a natural state, the push plate (431) will be in a horizontal state and lift the head of the welding nail (3) in the clamping cavity, and the tail of the welding nail (3) will protrude upward from the fixed welding nail clamp (422). The mounting base (4) is provided with a support rod (44). When the sliding welding nail clamp (424) and the lifting base (43) slide to the fixed welding nail clamp (422), the support rod (44) will push the push plate (431) to flip upward, so that the push plate (431) is disengaged from the top of the clamping cavity. The mounting base (4) is provided with a first baffle (433), and the push plate (431) is located between the first baffle (433) and the fixed welding stud clamp (422). When the push plate (431) is in a horizontal state and lifts the head of the welding stud (3) in the clamping cavity, the first baffle (433) will lift the lower surface of the push plate (431).

2. The prefabricated steel beam system according to claim 1, characterized in that: The web plate (13) of the steel main beam is provided with a number of shear studs (16) arranged in a uniform manner, with a longitudinal spacing of 150 mm and a transverse spacing of 250 mm between two adjacent shear studs (16).

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