A fixing device for welding of steel bar truss floor support plate and application method thereof

Abstract

This invention discloses a fixing device and its application method for welding steel truss floor deck slabs, comprising an L-shaped plate, a movable plate, a hydraulic rod, and a fixing box. The L-shaped plate includes a vertically connected flat plate I and a flat plate II. A strip groove I is formed on flat plate I, and a spring arranged along the length of the strip groove I is installed within the groove I. The two ends of the spring are connected to the strip groove I and the movable plate, respectively. The movable plate and flat plate I are slidably connected through the strip groove I. The movable plate and the L-shaped plate together form an F-shaped structure. Adjusting the distance between the movable plate and flat plate II completes the fixing of the L-shaped plate to the base plate. A hydraulic rod parallel to flat plate I and capable of extension and retraction along its length is connected to the side of the movable plate away from flat plate II. A fixing box is located at the end of the hydraulic rod away from the movable plate. The fixing box is equipped with a limiting mechanism for clamping or releasing the main body of the steel truss. The device of this invention has good fixing effect and ease of use, can improve construction efficiency, shorten the construction period, is reusable, and is economical.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and to a fixing device for welding steel truss floor decks and its application method, particularly to a fixing device for welding prefabricated steel truss floor decks and a method for completing the welding of prefabricated steel truss floor decks using the device. Background Technology

[0002] Steel truss floor decking is a type of unsupported profiled composite floor decking. It is first constructed in a back-end processing area by welding and shaping the upper and lower longitudinal steel bars (i.e., upper and lower chords) with bent small-diameter steel bars to form a small truss (i.e., a steel truss, which is a truss with steel bars as the upper chord, lower chord, and web members, connected by resistance spot welding) to form a structure with a certain rigidity capable of bearing loads. Then, on the construction site, the profiled steel sheets (i.e., steel truss floor decking) are fixed to the steel beams using studs or welding. The small truss is then placed on the profiled steel sheets and bound and welded. After acceptance, it is finished by cast-in-place concrete.

[0003] Currently, the production of steel truss floor decking in the industry has been mechanized. This is beneficial for uniform steel bar spacing and consistent concrete cover thickness, thus improving the construction quality of the floor slab. At the same time, prefabricated steel truss floor decking can significantly reduce on-site steel bar tying work, accelerate construction progress, increase construction safety, and achieve civilized construction. Currently, during the welding of steel truss floor decking, the steel truss is in contact with the base slab, which can easily lead to misalignment during welding, resulting in inconsistent dimensions of the welded steel truss floor decking. To overcome these problems, those skilled in the art have developed the following methods: Patent CN112900885A discloses an installation method and storage method for a steel truss floor deck, as well as the steel truss floor deck itself. Specifically, it prevents misalignment during welding of the steel truss to the base plate by spot welding the vertical support bars of the steel truss floor deck to the steel beam. However, welding affects work efficiency to some extent and prevents the removal of previously fixed points. Patent CN112982779A discloses a construction method for floor slab construction using detachable wooden formwork steel truss floor decks. Specifically, it uses wooden formwork for fixing, which differs from current industry-standard methods. Patent CN113006471A... A detachable steel truss floor slab formwork system and its overall construction method are disclosed. Essentially, the steel truss is connected to the main formwork body via multiple specific structural fasteners arranged in a row to form an integral formwork. While the fasteners can be disassembled after the floor slab is poured, this disassembly is a rigid process, and the fixing process is relatively cumbersome, causing inconvenience and affecting construction efficiency. Many construction workers also use homemade fixing devices to limit the movement of the steel truss, typically using screws. This further complicates disassembly, increases the difficulty of operation, and reduces work efficiency.

[0004] Therefore, developing a fixing device for welding steel truss floor slabs that can effectively fix steel trusses while being easy to operate and highly efficient is of great practical significance. Summary of the Invention

[0005] Due to the aforementioned defects in the existing technology, the present invention provides a fixing device for welding steel truss floor slabs that can effectively fix steel trusses while being easy to operate and highly efficient, in order to solve the problems of easy slippage during welding of existing steel truss floor slabs, inconvenient disassembly of existing steel truss floor slab welding fixing devices, and significant impact on work efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A fixing device for welding steel truss floor decking includes an L-shaped plate, a movable plate, a hydraulic rod, and a fixing box;

[0008] The L-shaped plate includes two vertically connected plates, I and II, which are connected to form an L-shaped structure. Plate I has a slot I, the length of which is perpendicular to the connecting edge of plates I and II. A spring is provided in the slot I, arranged along the length of the slot I. One end of the spring is fixed to the end of the slot I away from plate II, and the other end is fixed to a movable plate. The movable plate is slidably connected to plate I through the slot I and is parallel to plate II. The movable plate and the L-shaped plate together form an F-shaped structure. The L-shaped plate can be fixed to the base plate by adjusting the distance between the movable plate and plate II. A hydraulic rod parallel to plate I and extendable in the length direction is connected to the side of the movable plate away from plate II. A fixing box is provided at the end of the hydraulic rod away from the movable plate.

[0009] The fixing box includes a fixing part and a movable plate. The fixing part includes a fixing part base plate, a fixing part side plate I, and a fixing part side plate II. The fixing part base plate is connected to a hydraulic rod and has a strip groove II. A threaded rod is arranged along the length of the strip groove II in the strip groove II. One end of the threaded rod passes through the fixing part base plate. The fixing part side plate I and the fixing part side plate II are perpendicular to the fixing part base plate. The fixing part side plate I is parallel to the strip groove II and perpendicular to the fixing part side plate II. The fixing part side plate I and the fixing part side plate II form an L-shaped structure on the fixing part base plate. The movable plate is installed on the threaded rod through a threaded hole. The movable plate is perpendicular to the fixing part base plate and parallel to the fixing part side plate II. By rotating the threaded rod, the distance between the movable plate and the fixing part side plate II can be adjusted to clamp or release the main body of the steel truss (these structures that clamp or release the main body of the steel truss are called limiting mechanisms).

[0010] The fixing device for welding steel truss floor decking of the present invention has a simple overall structure. It fixes the base plate by cooperating with an L-shaped plate and a movable plate. The height of the fixing box in the vertical direction is adjusted by a hydraulic rod, and the main body of the steel truss is fixed by the fixing box. It has a good fixing effect and eliminates the need for inefficient operations such as welding and bolt fixing. The fixing operation can be completed by simply pulling the movable plate, opening the hydraulic rod, and manually rotating the threaded rod. Disassembly is also simple. Two or more fixing devices for welding steel truss floor decking can be used to easily fix the steel truss floor decking to the base plate. It has a good fixing effect, is easy to operate, has high construction efficiency, and can be repeatedly disassembled and reused. It is economical and has great application prospects.

[0011] As a preferred technical solution:

[0012] As described above, a fixing device for welding steel truss floor decking includes a sliding block and a limiting block (to prevent rotation of the movable plate during movement).

[0013] The movable plate is connected to the limiting block via a sliding block. The sliding block is located within the strip groove I and can slide within the strip groove I. The limiting block and the movable plate are located on opposite sides of the plate I, and the length of the limiting block along the width direction of the strip groove I is greater than the width of the strip groove I.

[0014] As described above, in a fixing device for welding steel truss floor decking, the spring is fixed to a sliding block.

[0015] As described above, in a fixing device for welding steel truss floor decking, the threaded rod is fixedly connected to a rotating shaft coaxial with the threaded rod, and the rotating shaft is used to limit the threaded rod.

[0016] As described above, a fixing device for welding steel truss floor decking has a movable rod perpendicular to the rotating shaft at the end away from the threaded rod (to facilitate the rotation of the threaded rod), and the movable rod is fixedly connected to the rotating shaft.

[0017] As described above, a fixing device for welding steel truss floor decking includes a limiting rod on the bottom plate of the fixing part, which works in conjunction with a movable rod. The limiting rod is used to restrict the rotation of the movable rod and is fixed to the bottom plate of the fixing part through a limiting hole.

[0018] As described above, a fixing device for welding steel truss floor decking has an internal thread structure on the inner wall of the limiting hole and an external thread structure that matches the internal thread structure on the outer wall of the limiting rod.

[0019] As described above, in a fixing device for welding steel truss floor decking, one end of the threaded rod is fixed in a fixing hole opened in the strip groove II, and the other end is fixed in a rotating hole that passes through the bottom plate of the fixing part.

[0020] The scope of protection of this invention is not limited to the above-mentioned limitations. The above-described invention is only one feasible technical solution. Those skilled in the art can optimize / simplify the design of the specific structure of the fixing device according to actual needs in practical applications.

[0021] Furthermore, the present invention also provides a method for welding steel truss floor decks using a fixing device for welding steel truss floor decks as described above, the steps of which are as follows:

[0022] (1) Fixing device for assembling steel truss floor decking welding;

[0023] (2) Install the fixing device for welding steel truss floor deck on both sides of the base plate. The fixing boxes of the two fixing devices for welding steel truss floor deck are symmetrically arranged on both sides of the base plate and the fixing part side plate I is located away from the base plate. The installation process is as follows: pull the movable plate to increase the distance between the movable plate and the flat plate II, then put the base plate between the movable plate and the flat plate II, and release the movable plate. At this time, the movable plate is fixed on the base plate together with the flat plate II under the action of the spring.

[0024] (3) Open the hydraulic rod to adjust the vertical position of the fixing box so that the inner wall of the L-shaped structure formed by the fixing side plate I and the fixing side plate II contacts the main body of the steel truss. Then rotate the movable rod to drive the moving plate to move along the length of the threaded rod, that is, adjust the distance between the moving plate and the fixing side plate II to clamp the main body of the steel truss. Then rotate the limiting rod into the limiting hole.

[0025] (4) Welding the steel truss floor deck to the bottom slab;

[0026] (5) After welding is completed, remove the fixing device for welding the steel truss floor deck.

[0027] The device of this invention adopts a convenient operation design, which can be quickly completed by construction personnel. The various parts of the invention are ingeniously designed and work together to greatly facilitate the construction personnel in fixing the steel truss floor deck and base plate, preventing slippage during welding. The overall structure is easy to install and disassemble, and is extremely convenient to use, which can greatly improve the work efficiency of construction personnel and has great application prospects.

[0028] As a preferred technical solution:

[0029] The specific operation for removing the fixing device for welding the steel truss floor slab, as described above, is as follows:

[0030] (5.1) Remove the limiting rod;

[0031] (5.2) Rotating the movable rod increases the distance between the movable plate and the fixed side plate II, thus loosening the main body of the steel truss;

[0032] (5.3) Opening the hydraulic rod shortens its length;

[0033] (5.4) After pulling the movable plate to increase the distance between the movable plate and the plate II, remove the bottom plate from between the movable plate and the plate II.

[0034] The above invention has the following advantages or beneficial effects:

[0035] The fixing device for welding steel truss floor decking of the present invention has a simple overall structure. It fixes the base plate by the cooperation of an L-shaped plate and a movable plate. The height of the fixing box in the vertical direction is adjusted by a hydraulic rod, and the main body of the steel truss is fixed by the fixing box. It has a good fixing effect and eliminates the need for inefficient operations such as welding and bolt fixing. The fixing operation can be completed by simply pulling the movable plate, opening the hydraulic rod, and manually rotating the threaded rod. Disassembly is also simple. Using two or more fixing devices for welding steel truss floor decking can easily fix the steel truss floor decking to the base plate and then complete the welding of the steel truss floor decking. It has a good fixing effect, is easy to operate, has high construction efficiency, and can be repeatedly disassembled and reused. It is economical and has great application prospects. Attached Figure Description

[0036] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their focus is on illustrating the gist of the invention.

[0037] Figure 1 This is a schematic diagram showing the usage state of the fixing device for welding steel truss floor decking according to the present invention;

[0038] Figure 2 A three-dimensional schematic diagram of the hydraulic rod and the L-shaped plate;

[0039] Figure 3 A three-dimensional schematic diagram of the hydraulic rod and the mounting box;

[0040] Figure 4 A three-dimensional schematic diagram of the movable plate and the sliding block;

[0041] Figure 5 An exploded view of the limiting mechanism.

[0042] Figure 6 A three-dimensional schematic diagram of the L-shaped plate and the strip groove II;

[0043] Figure 7 A three-dimensional schematic diagram of the threaded rod and the rotating shaft;

[0044] In the diagram, 1-base plate, 2-steel truss main body, 3-movable plate, 4-hydraulic rod, 5-fixed box, 501-fixed part base plate, 502-fixed part side plate I, 503-fixed part side plate II, 6-limiting mechanism, 601-strip groove II, 602-moving plate, 603-threaded rod, 604-threaded hole, 7-L-shaped plate, 8-sliding block, 9-strip groove I, 10-limiting block, 11-rotating shaft, 12-rotating hole, 13-movable rod, 14-limiting rod, 15-fixed hole, 16-spring, 17-limiting hole. Detailed Implementation

[0045] The structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0046] Example 1

[0047] A fixing device for welding steel truss floor decking has been specifically used in the EPC project of Nanjing International Precision Medicine Center, such as... Figures 1-7 As shown, it includes an L-shaped plate 7, a movable plate 3, a hydraulic rod 14, and a fixed box 5;

[0048] The movable plate 3 includes a sliding block 8 and a limiting block 10, and the movable plate 3 is connected to the limiting block 10 through the sliding block 8;

[0049] The L-shaped plate 7 includes two vertically connected plates, plate I and plate II, which are connected to form an L-shaped structure. Plate I has a slot I 9, the length of which is perpendicular to the connecting edge of plate I and plate II. A spring 16 is arranged along the length of slot I 9, with one end fixed to the end of slot I 9 away from plate II and the other end fixed to a sliding block 8. The movable plate 3 is slidably connected to plate I through slot I 9 (specifically, the sliding block 8 is located in slot I 9 and can slide within it). The limiting block 10 and the movable plate 3 are located on opposite sides of plate I, and the length of the limiting block 10 along the width of slot I 9 is greater than that of slot I 9. The width of 9) and the movable plate 3 is parallel to the plate II. The movable plate 3 and the L-shaped plate 7 form an F-shaped structure. The L-shaped plate 7 and the base plate 1 can be fixed by adjusting the distance between the movable plate 3 and the plate II. The side of the movable plate 3 away from the plate II is connected to a hydraulic rod 14 that is parallel to the plate I and can extend and retract in the length direction. The end of the hydraulic rod 14 away from the movable plate 3 is provided with a fixing box 5.

[0050] The fixing box 5 includes a fixing part and a movable plate 602. The fixing part includes a fixing part base plate 501, a fixing part side plate I 502, and a fixing part side plate II 503. The fixing part base plate 501 is connected to the hydraulic rod 14 and has a strip groove II 601. A threaded rod 603 is provided in the strip groove II 601 along the length direction of the strip groove II 601. One end of the threaded rod 603 protrudes from the fixing part base plate 501 (one end of the threaded rod 603 is fixed to the strip groove II). The threaded rod 603 is fixedly connected to the rotating shaft 11 coaxial with the threaded rod 603. The rotating shaft 11, located away from the threaded rod 603, has a movable rod 13 fixedly connected perpendicularly to the rotating shaft 11. The base plate 501 of the fixed part has a limiting rod 14 (used to limit the rotation of the movable rod 13) that cooperates with the movable rod 13. The limiting rod 14 is fixed to the base plate 501 of the fixed part through a limiting hole 17 (the inner wall of the limiting hole 17 has an internal thread structure, and the outer wall of the limiting rod 14 has an external thread structure matching the internal thread structure). The side plates I and II of the fixed part are perpendicular to the base plate 501 of the fixed part. The side plate I 502 is parallel to and perpendicular to the strip groove II 601. 502 and the fixed part side plate II 503 form an L-shaped structure on the fixed part base plate 501. The movable plate 602 is installed on the threaded rod 603 through the threaded hole 604 provided on it. The movable plate 602 is perpendicular to the fixed part base plate 501 and parallel to the fixed part side plate II 503. By rotating the movable rod 13, the distance between the movable plate and the fixed part side plate II can be adjusted to achieve the clamping or loosening of the steel truss body (these structures that achieve the clamping or loosening of the steel truss body are the limiting mechanism 6).

[0051] By setting the limiting mechanism 6, when the user welds the steel truss body 2 and the base plate 1, the movable plate 3 is placed on both sides of the bottom of the steel truss body 2. By activating the hydraulic rod 4, the position of the fixed box 5 is adjusted so that the inner wall of the fixed box 5 contacts the steel truss body 2. At this time, the threaded rod 603 is rotated. The threaded rod 603 rotates in the inner cavity of the threaded hole 604, driving the movable plate 602 to move. The movable plate 602 clamps the steel truss body 2, thereby achieving the effect of limiting the steel truss body 2 and preventing the steel truss body 2 from shifting during welding, which would result in different dimensions of the welded product and make it inconvenient to use. By setting the fixed box 5, the steel truss body 2 is located between two fixed blocks, thereby achieving the effect of preventing the steel truss body 2 from moving left and right.

[0052] By using the L-shaped plate 7 and the sliding block 8 together, the user moves the movable plate 3 upward, which in turn moves the sliding block 8 upward. The sliding block 8 is guided by the strip groove I 9, and the sliding block 8 causes the spring 16 to deform under force. When the movable plate 3 moves to a certain position, the user places the L-shaped plate 7 at the bottom of the base plate 1, so that the side of the base plate 1 closest to the L-shaped plate 7 contacts the L-shaped plate 7. The deformation of the spring 16 causes the movable plate 3 to move downward, achieving the effect of clamping the base plate 1 and preventing the movable plate 3 from shifting. After the user finishes welding, the hydraulic rod 4 is moved downward. When it moves to a certain position, the movable plate 3 is moved upward to remove the L-shaped plate 7 from the bottom of the base plate 1, thus facilitating the disassembly of the L-shaped plate 7 and allowing the L-shaped plate 7 to be used multiple times.

[0053] By setting the limit block 10, the movable plate 3 is prevented from rotating when it is moved, which would cause the movable plate 3 to get stuck when it moves. This makes it easier to move the movable plate 3. By setting the L-shaped plate 7 and the movable plate 3 together, the base plate 1 is clamped.

[0054] By setting the rotating shaft 11, the threaded rod 603 is driven to rotate, preventing the threaded rod 603 from moving itself when it rotates, which would prevent the moving plate 602 from moving. By setting the rotating hole 12, the rotating shaft 11 can be made to rotate.

[0055] By setting the movable rod 13, the effect of facilitating the rotation of the movable rod 13 is achieved. By setting the limiting rod 14 and the limiting hole 17 in cooperation, when the steel truss body 2 is welded, the steel truss body 2 will shift and drive the moving plate 602 to move. The moving plate 602 drives the threaded rod 603 to rotate. The movable rod 13 is limited by the limiting rod 14. The surface of the limiting rod 14 is threaded to prevent the limiting rod 14 from disengaging from the limiting groove 17, thereby achieving the effect of preventing the rotating shaft 11 from rotating.

[0056] By providing a fixing hole 15 to support the threaded rod 603, the friction between the threaded rod 603 and the fixing hole 15 is reduced when the threaded rod 603 rotates, thus facilitating the rotation of the threaded rod 603. By providing a strip groove I 601 in cooperation with the moving plate 602, the strip groove I 601 is used to guide the movement of the moving plate 602. The bottom of both sides of the moving plate 602 is in contact with the inner wall of the strip groove I 601, preventing the threaded rod 603 from rotating and causing the moving plate 602 to be unable to move, thus achieving the effect of facilitating the movement of the moving plate 602.

[0057] The method for welding steel truss floor decks using the aforementioned fixing device is as follows:

[0058] (1) Fixing device for assembling steel truss floor decking welding;

[0059] (2) Install the fixing device for welding steel truss floor deck on both sides of the base plate. The fixing boxes of the two fixing devices for welding steel truss floor deck are symmetrically arranged on both sides of the base plate and the fixing part side plate I is located away from the base plate. The installation process is as follows: pull the movable plate to increase the distance between the movable plate and the flat plate II, then put the base plate between the movable plate and the flat plate II, and release the movable plate. At this time, the movable plate is fixed on the base plate together with the flat plate II under the action of the spring.

[0060] (3) Activate the hydraulic rod to adjust the vertical position of the fixing box so that the inner wall of the L-shaped structure formed by the fixing side plate I and the fixing side plate II contacts the main body of the steel truss. Then, rotate the movable rod to drive the moving plate to move along the length of the threaded rod, that is, adjust the distance between the moving plate and the fixing side plate II to clamp the main body of the steel truss. Then, rotate the limiting rod into the limiting hole. At this time, its overall structure is as follows: Figure 1 As shown;

[0061] (4) Welding the steel truss floor deck to the bottom slab;

[0062] (5) After welding is completed, remove the fixing device for welding steel truss floor deck (remove the limiting rod; rotate the movable rod to increase the distance between the movable plate and the fixed part side plate II, that is, loosen the main body of the steel truss; open the hydraulic rod to shorten the length of the hydraulic rod; pull the movable plate to increase the distance between the movable plate and the plate II, and then remove the bottom plate from between the movable plate and the plate II).

[0063] Verification by the Nanjing International Precision Medicine Center EPC project revealed that the fixing device for welding steel truss floor decking of this invention is stable and safe, easy to use, can greatly improve construction efficiency and shorten the construction period, is reusable, has a simple structure of each component, and can even be made on-site using materials, making it economical and highly promising for application.

[0064] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0065] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A fixing device for welding steel truss floor decking, characterized in that: Includes L-shaped plate, movable plate, hydraulic rod and fixing box; The L-shaped plate includes two vertically connected plates, I and II, which are connected to form an L-shaped structure. Plate I has a slot I, the length of which is perpendicular to the connecting edge of plates I and II. A spring is provided in the slot I, arranged along the length of the slot I. One end of the spring is fixed to the end of the slot I away from plate II, and the other end is fixed to a movable plate. The movable plate is slidably connected to plate I through the slot I and is parallel to plate II. The movable plate and the L-shaped plate together form an F-shaped structure. The L-shaped plate can be fixed to the base plate by adjusting the distance between the movable plate and plate II. A hydraulic rod parallel to plate I and extendable in the length direction is connected to the side of the movable plate away from plate II. A fixing box is provided at the end of the hydraulic rod away from the movable plate. The fixing box includes a fixing part and a movable plate. The fixing part includes a fixing part base plate, a fixing part side plate I, and a fixing part side plate II. The fixing part base plate is connected to a hydraulic rod and has a strip groove II. A threaded rod is arranged along the length of the strip groove II in the strip groove II. One end of the threaded rod passes through the fixing part base plate. The fixing part side plate I and the fixing part side plate II are perpendicular to the fixing part base plate. The fixing part side plate I is parallel to the strip groove II and perpendicular to the fixing part side plate II. The fixing part side plate I and the fixing part side plate II form an L-shaped structure on the fixing part base plate. The movable plate is installed on the threaded rod through a threaded hole. The movable plate is perpendicular to the fixing part base plate and parallel to the fixing part side plate II. By rotating the threaded rod, the distance between the movable plate and the fixing part side plate II can be adjusted to clamp or loosen the main body of the steel truss. The threaded rod is fixedly connected to a rotating shaft that is coaxial with the threaded rod; The end of the rotating shaft away from the threaded rod is provided with a movable rod perpendicular to the rotating shaft, and the movable rod is fixedly connected to the rotating shaft; The base plate of the fixed part is provided with a limiting rod that works in conjunction with the movable rod. The limiting rod is used to restrict the rotation of the movable rod and is fixed to the base plate of the fixed part through a limiting hole.

2. The fixing device for welding steel truss floor decking according to claim 1, characterized in that, The movable plate includes a sliding block and a limiting block; The movable plate is connected to the limiting block via a sliding block. The sliding block is located within the strip groove I and can slide within the strip groove I. The limiting block and the movable plate are located on opposite sides of the plate I, and the length of the limiting block along the width direction of the strip groove I is greater than the width of the strip groove I.

3. The fixing device for welding steel truss floor decking according to claim 2, characterized in that, The spring is fixed to the sliding block.

4. The fixing device for welding steel truss floor decking according to claim 1, characterized in that, The inner wall of the limiting hole is provided with an internal thread structure, and the outer wall of the limiting rod is provided with an external thread structure that matches the internal thread structure.

5. A fixing device for welding reinforced truss floor decking according to claim 1, characterized in that, One end of the threaded rod is fixed in the fixing hole opened in the strip groove II, and the other end is fixed in the rotating hole that passes through the bottom plate of the fixing part.

6. A method for welding steel truss floor decks using a fixing device for welding steel truss floor decks as described in any one of claims 1 to 5, characterized in that, The steps are as follows: (1) Fixing device for assembling steel truss floor decking welding; (2) Install the fixing device for welding steel truss floor deck on both sides of the base plate. The fixing boxes of the two fixing devices for welding steel truss floor deck are symmetrically arranged on both sides of the base plate and the fixing part side plate I is located away from the base plate. The installation process is as follows: pull the movable plate to increase the distance between the movable plate and the flat plate II, then put the base plate between the movable plate and the flat plate II, and release the movable plate. At this time, the movable plate is fixed on the base plate together with the flat plate II under the action of the spring. (3) Open the hydraulic rod to adjust the vertical position of the fixing box so that the inner wall of the L-shaped structure formed by the fixing side plate I and the fixing side plate II contacts the main body of the steel truss. Then rotate the movable rod to drive the moving plate to move along the length of the threaded rod, that is, adjust the distance between the moving plate and the fixing side plate II to clamp the main body of the steel truss. Then rotate the limiting rod into the limiting hole. (4) Welding the steel truss floor deck to the bottom slab; (5) After welding is completed, remove the fixing device for welding the steel truss floor deck.

7. The method according to claim 6, characterized in that, The specific steps for removing the fixing device used for welding the steel truss floor slab are as follows: (5.1) Remove the limiting rod; (5.2) Rotating the movable rod increases the distance between the movable plate and the fixed side plate II, thus loosening the main body of the steel truss; (5.3) Opening the hydraulic rod shortens its length; (5.4) After pulling the movable plate to increase the distance between the movable plate and the plate II, remove the bottom plate from between the movable plate and the plate II.

Images