Support special for stair welding

Abstract

The invention discloses a special bracket for stair welding, which comprises a mounting platform and stepping frames arranged on the two sides of the mounting platform, welding tools are arranged on the two sides of the mounting platform, the welding tools can slide on the two sides of the mounting platform, and one or two groups of welding tools are arranged. The welding tool comprises a sliding rail and a sliding seat connected with the sliding rail in a sliding mode, a supporting frame is detachably connected to the sliding seat, an auxiliary platform is fixedly arranged on the supporting frame, a notch matched with a stair plate frame is formed in the auxiliary platform, and the sliding seat is connected with the sliding rail in a sliding mode. An inner connecting frame detachably connected with the auxiliary platform is arranged on the side, opposite to the stair plate frame, of the auxiliary platform, a sliding groove is formed in the bottom of the sliding seat, and the sliding rails are arranged on the two sides of the installation platform in a buried mode. Butt joint plates are arranged on the end face of the sliding base at intervals, and the butt joint plates and the bottom fixing installation base of the supporting frame are matched in an inserted connection mode and fixed through bolts.

Description

Technical Field

[0001] The present invention belongs to the field of construction technology, and particularly relates to a special bracket for staircase welding. Background Art

[0002] As the main vertical traffic and the main passage during emergency evacuation in a building, the staircase has an important impact on the normal use and emergency evacuation of the entire building.

[0003] Most existing housing buildings adopt traditional cast-in-place reinforced concrete staircases. Although they have great advantages in terms of firmness, sound insulation effect and maintenance-free, the self-weight of the reinforced concrete staircase is relatively large, and complex processes such as formwork support, steel bar binding, on-site pouring and curing are required. There are disadvantages such as long construction period, many concealed works and poor quality controllability.

[0004] In order to solve the defects of the above-mentioned existing technologies, the prior art effectively combines steel structure with concrete pouring, and effectively combines the sectional steel staircase structure with concrete pouring to ensure the strength of the structure of the entire sectional steel staircase and ensure the reliable connection with the floor beam and the concrete floor.

[0005] However, in the prior art, during the production of the sectional steel staircase structure, it is all prefabricated on the ground, and it is often fixed in cooperation with the ladder frame and the temporarily erected bracket. In the above form, it is time-consuming and laborious, and the work efficiency is low. When carrying out butt welding, there is a lack of installation tooling for positioning, fixing and supporting, and there is a risk of tipping over during combined installation.

[0006] In view of the above factors, the present utility model provides a special bracket for staircase welding, which can facilitate welding in the use state, can be positioned, fixed and supported through installation tooling, improve work efficiency, and at the same time avoid the risk of tipping over of the steel plate structure of the staircase plate to be welded during combined installation. Summary of the Invention

[0007] The purpose of the present invention is to provide a special bracket for staircase welding to solve the problems raised in the above background art.

[0008] The purpose of the present invention is achieved by the following technical solutions: A special bracket for staircase welding includes an installation platform and step frames arranged on both sides of the installation platform. Welding tooling is arranged on both sides of the installation platform, and the welding tooling can slide on both sides of the installation platform;

[0009] One group or two groups of the welding tooling are provided. The welding tooling includes a slide rail and a sliding seat slidably connected to the slide rail. A support frame is detachably connected to the sliding seat, and an auxiliary platform is fixedly arranged on the support frame;

[0010] The auxiliary platform is provided with notches that cooperate with the stair slab frame, and an inner connection frame detachably connected to the auxiliary platform is arranged on the side of the auxiliary platform opposite to the stair slab frame.

[0011] Further, a sliding groove is arranged at the bottom of the sliding seat, and the sliding groove cooperates with the sliding rail, and the sliding rail is arranged on both sides of the installation platform in a buried manner;

[0012] Docking plates are arranged at intervals on the end face of the sliding seat, and the docking plates are in plug-in cooperation with the fixed mounting seat at the bottom of the support frame and are fixed by bolts.

[0013] Further, the auxiliary platform is a concave-shaped frame formed by steel structures, and the auxiliary platform is detachably connected to the inner connection frame;

[0014] A channel opening is arranged on the inner connection frame opposite to the notch arranged on the auxiliary platform.

[0015] Further, the detachable manner between the auxiliary platform and the inner connection frame is a sliding connection;

[0016] The auxiliary platform cooperates with the track groove on the inner connection frame through a concave-shaped frame formed by steel structures.

[0017] Further, the bottom plane of the channel opening arranged on the inner connection frame is on the same plane as the bottom plane of the notch arranged on the auxiliary platform.

[0018] Further, the channel opening arranged on the inner connection frame extends towards the stair slab frame side, and the stair slab frame is fitted in the channel opening.

[0019] Further, the track grooves arranged on the inner connection frame are located on both sides of the inner connection frame;

[0020] The notches and channel openings formed on the auxiliary platform and the inner connection frame are arranged in the same rectangular structure;

[0021] Step brackets are arranged in the notches and channel openings formed on the auxiliary platform and the inner connection frame, and the step brackets are arranged along the transverse direction of the auxiliary platform and the inner connection frame;

[0022] And the length of the step bracket is the same as the length of the auxiliary platform and the inner connection frame.

[0023] Further, the support frame is in an eight-shaped configuration, and the support frame is a hydraulic cylinder, and the support frames are supported by I-beams.

[0024] Further, a sliding docking group is arranged on the installation platform, and the sliding docking group includes a support sliding group and a support positioning group;

[0025] The support sliding group includes a first platform slidably connected to the installation platform, and hydraulic support rods arranged in a matrix on the first platform;

[0026] The support positioning group includes a second platform slidably connected to the installation platform. A fixed pressure plate is connected to the second platform through an electric cylinder. The fixed pressure plate protrudes outward on the side close to the auxiliary platform, and positioning holes are provided in the outward protruding part of the fixed pressure plate.

[0027] An application method of a special welding bracket for stairs includes the following steps;

[0028] On the installation platform and the step tread frames arranged on both sides of the installation platform, welding fixtures are arranged on both sides of the installation platform, and the welding fixtures can slide on both sides of the installation platform;

[0029] The auxiliary platform is connected to the inner connecting frame in a matching manner. The auxiliary platform is a concave-shaped frame formed by steel structures. The auxiliary platform is detachably connected to the inner connecting frame, and a channel opening is provided on the inner connecting frame opposite to the notch provided on the auxiliary platform;

[0030] During use, the steel plate structure of the stair tread to be welded is installed in the channel opening provided on the inner connecting frame and the notch provided on the auxiliary platform, and the installer performs welding on the installation platform;

[0031] The support sliding group is used to support the stair tread to be welded. A sliding docking group is arranged on the installation platform. The sliding docking group includes a support sliding group and a support positioning group. The support sliding group includes a first platform slidably connected to the installation platform, and hydraulic support rods arranged in a matrix on the first platform;

[0032] With the above structure set, during use, the support sliding group supports the steel plate structure of the stair tread to be welded on the installation platform. A support flat plate is provided on the hydraulic support rod of the support sliding group, and the support flat plate contacts and supports the steel plate structure of the stair tread to be welded.

[0033] With the above structure set, during use, two sets of symmetric first platforms are arranged on the installation platform, and the hydraulic support rods are arranged at intervals on the first platform.

[0034] The support positioning group includes a second platform slidably connected to the installation platform. A fixed pressure plate is connected to the second platform through an electric cylinder. The fixed pressure plate protrudes outward on the side close to the auxiliary platform, and positioning holes are provided in the outward protruding part of the fixed pressure plate.

[0035] When using the above structure, after the steel structure of the stair slab to be welded is supported by the support flat plate provided on the hydraulic support rod of the support sliding group for support welding, on the side of the steel structure of the stair slab to be welded close to the support positioning group, the second platform is moved closer to the steel structure of the stair slab to be welded, and the fixed pressure plate on the electric cylinder is used to press and fix the steel structure of the stair slab to be welded;

[0036] When fixing, the positioning hole installation bolts are provided on the protruding part of the fixed pressure plate and are matched and fixed with the bolt holes provided on the installation platform.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] In the present invention, the horizontal steel plate, vertical steel plate and side sealing steel plate of each step can serve as templates by themselves without the need for additional formwork support or steel bar binding, and the construction is simple and the construction period is short.

[0039] In order to facilitate the support of the steel structure of the stair slab to be welded by the cooperation connection of the auxiliary platform 34 and the internal connection frame in the use state, the steel structure of the stair slab to be welded includes the horizontal steel plate and vertical steel plate of each step. The horizontal steel plate and vertical steel plate are supported at both ends by the internal connection frame. The auxiliary platform is a concave-shaped frame formed by steel structure. The auxiliary platform is detachably connected to the internal connection frame and fixed by bolts. When it needs to be disassembled, the bolts can be directly removed. In order to facilitate the sliding detachment after support in the use state, the detachable connection between the auxiliary platform and the internal connection frame is a sliding connection.

[0040] A channel opening is provided on the internal connection frame of the present invention opposite to the notch provided on the auxiliary platform. The auxiliary platform is matched with the track groove on the internal connection frame through a concave-shaped frame formed by steel structure.

[0041] In the present invention, a support sliding group is used to support the steel structure of the stair plate to be welded on the installation platform. A support flat plate is provided on the hydraulic support rod of the support sliding group, and the support flat plate is in contact with and supports the steel structure of the stair plate to be welded. When using the above structure, two symmetrical groups are arranged on the installation platform of the first platform, and the hydraulic support rods are arranged at intervals on the first platform. The support positioning group includes a second platform that is slidably connected to the installation platform. A fixed pressure plate is connected to the second platform through an electric cylinder. The fixed pressure plate protrudes outward on the side close to the auxiliary platform, and positioning holes are provided in the outward protruding part of the fixed pressure plate. When using the above structure, after the steel structure of the stair plate to be welded is supported and welded by the support flat plate provided on the hydraulic support rod of the support sliding group, on the side of the steel structure of the stair plate to be welded close to the support positioning group, the second platform is moved closer to the steel structure of the stair plate to be welded, and the steel structure of the stair plate to be welded is pressed and fixed by the fixed pressure plate on the electric cylinder. When fixing, bolts are installed through the positioning holes provided in the outward protruding part of the fixed pressure plate and are matched and fixed with the bolt holes provided on the installation platform.

[0042] When in use, the present invention can support on both sides of the installation platform, facilitating welding in the use state, and can be positioned, fixed and supported through the installation tooling, improving work efficiency. At the same time, when performing combined installation, the risk of the steel structure of the stair plate to be welded tipping over can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is the overall schematic diagram of the present invention;

[0044] Figure 2 is the schematic diagram of the cooperation between the slide rail / slide seat of the present invention;

[0045] Figure 3 is the enlarged schematic diagram of the welding tooling of the present invention;

[0046] Figure 4 is the plane schematic diagram of the internal connection frame of the present invention;

[0047] Figure 5 is the schematic diagram of the slide seat having a docking plate of the present invention;

[0048] Figure 6 is the enlarged partial schematic diagram of the internal connection frame of the present invention;

[0049] Figure 7 is the connection schematic diagram between the auxiliary platform and the internal connection frame of the present invention;

[0050] Figure 8 is the schematic diagram of the step support provided in the channel opening of the present invention;

[0051] Figure 9It is an enlarged schematic diagram of the support sliding group of the present invention;

[0052] Figure 10 It is an enlarged schematic diagram of the support positioning group of the present invention. Detailed implementation manners

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0056] As Figure 1-10 shown, a special welding bracket for stairs includes an installation platform 1 and step frames 2 arranged on both sides of the installation platform 1. Welding tooling 3 is arranged on both sides of the installation platform 1, and the welding tooling 3 can slide on both sides of the installation platform 1;

[0057] One or two groups of the welding tooling 3 are provided. The welding tooling 3 includes a slide rail 31 and a sliding seat 32 slidably connected to the slide rail 31. A support frame 33 is detachably connected to the sliding seat 32, and an auxiliary platform 34 is fixedly arranged on the support frame 33;

[0058] In the use state, the sliding seat 32 slidably connected to the slide rail 31 is fixed and positioned by a pin after being positioned.

[0059] A notch matching the stair plate frame is arranged on the auxiliary platform 34, and an internal connection frame 4 detachably connected to the auxiliary platform 34 is arranged on the side of the auxiliary platform 34 opposite to the stair plate frame.

[0060] In order to facilitate detachable replacement in the use state, a chute 5 is provided at the bottom of the sliding seat 32, and the chute 5 cooperates with the slide rail 31. The slide rail 31 is arranged on both sides of the installation platform 1 in a buried manner;

[0061] Docking plates 6 are arranged at intervals on the end face of the sliding seat 32. The docking plates 6 are in plug-in fit with the fixed mounting seats at the bottom of the support frame 33 and are fixed by bolts.

[0062] In order to facilitate the connection and cooperation between the auxiliary platform 34 and the inner connection frame in the use state, the auxiliary platform 34 is a concave-shaped frame formed by steel structures, and the auxiliary platform 34 is detachably connected to the inner connection frame 4;

[0063] A channel opening 7 is provided on the inner connection frame 4 opposite to a notch 8 provided on the auxiliary platform 34.

[0064] In order to facilitate sliding detachment after support in the use state, the detachable manner between the auxiliary platform 34 and the inner connection frame 4 is a sliding connection;

[0065] The auxiliary platform 34 cooperates with the track groove on the inner connection frame 4 through a concave-shaped frame formed by steel structures.

[0066] In order to facilitate, in the use state, to ensure the steel plate structure of the stair plate to be welded

[0067] The bottom plane of the channel opening 7 provided on the inner connection frame 4 is on the same plane as the bottom plane of the notch 8 provided on the auxiliary platform 34.

[0068] In order to facilitate, in the use state, to support the steel plate structure of the stair plate to be welded at both ends through the inner connection frame 4, the channel opening 7 provided on the inner connection frame 4 extends towards the side of the stair plate frame, and the stair plate frame is fitted in the channel opening 7.

[0069] In order to facilitate, in the use state, to support the steel plate structure of the stair plate to be welded at both ends through the inner connection frame 4, the track grooves 9 provided on the inner connection frame 4 are located on both sides of the inner connection frame 4;

[0070] The notches and channel openings provided on the auxiliary platform 34 and the inner connection frame 4 are arranged in the same rectangular structure;

[0071] Step brackets 10 are arranged in the notches 8 and channel openings 7 provided on the auxiliary platform 34 and the inner connection frame 4. The step brackets 10 are arranged along the transverse direction of the auxiliary platform 34 and the inner connection frame 4;

[0072] And the length of the step bracket 10 is the same as the lengths of the auxiliary platform 34 and the inner connection frame 4.

[0073] In the using state of the above structure, a step bracket 10 is arranged in the notches 8 and the channel openings 7 formed in the auxiliary platform 34 and the inner connection frame 4 to support the steel plate structure of the stair tread to be welded.

[0074] After the steel plate structure of the stair tread to be welded is connected and welded, remove the bolts connecting the auxiliary platform 34 and the inner connection frame 4, slide the moving support frame 33 to separate and move the auxiliary platform 34 and the inner connection frame 4 forward, and then remove the inner connection frames 4 at both ends.

[0075] In order to facilitate height adjustment through the support frame 33 in the using state, the support frame 33 is in an eight-shaped configuration, and the support frame 33 is a hydraulic cylinder, and the support frames 33 are supported by I-beams.

[0076] In order to facilitate supporting the stair tread to be welded through the support sliding group 11 in the using state, a sliding docking group is arranged on the installation platform 1, and the sliding docking group includes a support sliding group 11 and a support positioning group 12;

[0077] The support sliding group 11 includes a first platform 13 slidably connected to the installation platform 1, and hydraulic support rods 14 arranged in a matrix on the first platform 13;

[0078] When the above structure is arranged and used, the support sliding group 11 supports the steel plate structure of the stair tread to be welded on the installation platform 1, and a support flat plate is arranged on the hydraulic support rod 14 of the support sliding group 11, and the support flat plate contacts and supports the steel plate structure of the stair tread to be welded.

[0079] When the above structure is arranged and used, two sets of the first platforms 13 are symmetrically arranged on the installation platform 1, and the hydraulic support rods 14 are arranged at intervals on the first platform 13.

[0080] The support positioning group 12 includes a second platform 15 slidably connected to the installation platform 1, and a fixed pressure plate 16 is connected to the second platform 15 through an electric cylinder. The fixed pressure plate 16 protrudes outward on the side close to the auxiliary platform 34, and positioning holes are arranged on the outward protruding part of the fixed pressure plate 16.

[0081] When using the above structure, after the steel structure of the stair plate to be welded is supported by the support flat plate arranged on the hydraulic support rod 14 of the support sliding group 11, on the side of the steel structure of the stair plate to be welded close to the support positioning group 12, the second platform 15 is moved closer to the steel structure of the stair plate to be welded, and the fixed pressure plate 16 on the electric cylinder is used to press and fix the steel structure of the stair plate to be welded;

[0082] When fixing, the positioning hole installation bolts are arranged on the protruding part of the fixed pressure plate 16 and are matched and fixed with the bolt holes arranged on the installation platform 1.

[0083] An application method of a special bracket for stair welding includes the following steps;

[0084] On the installation platform and the step tread frames arranged on both sides of the installation platform, welding tools are arranged on both sides of the installation platform, and the welding tools can slide on both sides of the installation platform;

[0085] The auxiliary platform is connected with the inner connecting frame in a matching manner. The auxiliary platform is a concave-shaped frame formed by a steel structure. The auxiliary platform is detachably connected to the inner connecting frame, and a channel opening is arranged on the inner connecting frame and is opposite to the notch arranged on the auxiliary platform;

[0086] When in use, the steel structure of the stair plate to be welded is installed in the channel opening arranged on the inner connecting frame and the notch arranged on the auxiliary platform, and the installer performs welding on the installation platform;

[0087] The support sliding group is used to support the stair plate to be welded. A sliding docking group is arranged on the installation platform. The sliding docking group includes a support sliding group and a support positioning group. The support sliding group includes a first platform slidably connected to the installation platform, and hydraulic support rods arranged in a matrix on the first platform;

[0088] When using the above structure, the support sliding group is used to support the steel structure of the stair plate to be welded on the installation platform. A support flat plate is arranged on the hydraulic support rod of the support sliding group, and the support flat plate is in contact with and supports the steel structure of the stair plate to be welded.

[0089] When using the above structure, two symmetrically arranged first platforms are arranged on the installation platform, and the hydraulic support rods are arranged at intervals on the first platform.

[0090] The support positioning group includes a second platform slidably connected to the installation platform. A fixed pressure plate is connected to the second platform through an electric cylinder. The fixed pressure plate protrudes outward on the side close to the auxiliary platform, and a positioning hole is arranged on the protruding part of the fixed pressure plate.

[0091] When the above structure is used, after the steel plate structure of the stair slab to be welded is supported and welded by the support flat plate arranged on the hydraulic support rod of the support sliding group, on the side of the steel plate structure of the stair slab to be welded close to the support positioning group, the second platform is moved closer to the steel plate structure of the stair slab to be welded, and the fixed pressure plate on the electric cylinder is used to press and fix the steel plate structure of the stair slab to be welded;

[0092] When fixing, the positioning hole mounting bolts are arranged on the protruding part of the fixed pressure plate and are fixed in cooperation with the bolt holes arranged on the mounting platform.

[0093] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0094] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special bracket for stair welding, characterized by: It comprises a mounting platform (1) and step frames (2) arranged on both sides of the mounting platform (1), welding tools (3) are arranged on both sides of the mounting platform (1), and the welding tools (3) can slide on both sides of the mounting platform (1); The welding fixture (3) is provided in one or two groups, and the welding fixture (3) comprises a slide rail (31) and a slide seat (32) connected to the slide rail (31) in a sliding manner, the slide seat (32) is connected to a support frame (33) in a detachable manner, and an auxiliary platform (34) is fixedly provided on the support frame (33); The auxiliary platform (34) is provided with a notch matched with the staircase frame, and an internal frame (4) connected to the auxiliary platform (34) in a detachable manner is provided on the side of the auxiliary platform (34) opposite to the staircase frame.

2. The special staircase welding bracket according to claim 1 is characterized in that: The bottom of the sliding seat (32) is provided with a sliding groove (5), the (5) cooperates with the sliding rail (31), and the sliding rail (31) is arranged on both sides of the installation platform (1) in an underground manner; A docking plate (6) is arranged at intervals on the end surface of the sliding seat (32), and the docking plate (6) is matched with the bottom fixed mounting seat of the support frame (33) in a plug-in manner and is fixed by bolts.

3. The special staircase welding bracket according to claim 2 is characterized in that: The auxiliary platform (34) is a concave-shaped frame formed by a steel structure, and the auxiliary platform (34) is connected to the internal frame (4) in a detachable manner; The inner frame (4) is provided with a passage opening (7) which is opposite to the notch opening (8) provided on the auxiliary platform (34).

4. The special staircase welding bracket according to claim 3 is characterized in that: The auxiliary platform (34) and the internal frame (4) are detachably connected in a sliding manner; The auxiliary platform (34) is matched with the track groove on the inner frame (4) through a concave frame formed by a steel structure.

5. The special staircase welding bracket according to claim 4 is characterized in that: The bottom plane of the passage opening (7) provided on the inner frame (4) and the bottom plane of the slot opening (8) provided on the auxiliary platform (34) are located on the same plane.

6. The special staircase welding bracket according to claim 5, characterized in that: The passage opening (7) provided on the inner frame (4) extends toward one side of the staircase frame, and the staircase frame fits in the passage opening (7).

7. The special staircase welding bracket according to claim 6 is characterized in that: The track grooves (9) provided on the inner frame (4) are located on both sides of the inner frame (4); the inner frame (4); The slots and passage openings on the auxiliary platform (34) and the inner frame (4) are arranged in the same rectangular structure; A step bracket (10) is arranged in the notch (8) and the passage opening (7) on the auxiliary platform (34) and the inner frame (4), and the step bracket (10) is arranged along the lateral direction of the auxiliary platform (34) and the inner frame (4); Furthermore, the length of the step bracket (10) is the same as the length of the auxiliary platform (34) and the inner frame (4).

8. The special staircase welding bracket according to claim 7 is characterized in that: The support frame (33) is in an "eight" shape, and the support frame (33) is a hydraulic cylinder. The support frames (33) are supported by I-beams.

9. The special staircase welding bracket according to claim 8, characterized in that: The installation platform (1) is provided with a sliding docking group, and the sliding docking group comprises a supporting sliding group (11) and a supporting positioning group (12); The supporting sliding group (11) comprises a first platform (13) connected to the mounting platform (1) by sliding, and hydraulic supporting rods (14) arranged in a matrix on the first platform (13); The support positioning group (12) includes a second platform (15) slidably connected to the mounting platform (1); the second platform (15) is connected to a fixed pressure plate (16) via an electric cylinder; the fixed pressure plate (16) is protruding outwardly near a side of the auxiliary platform (34); and a positioning hole is provided on the protruding portion of the fixed pressure plate (16).

10. An application method of the special stair welding bracket according to any one of claims 1 to 8, characterized in that: The steps include: On the installation platform and the step frames arranged on both sides of the installation platform, welding tools are arranged on both sides of the installation platform, and the welding tools can slide on both sides of the installation platform; The auxiliary platform is connected with the inner frame through cooperation, the auxiliary platform is a concave frame formed by a steel structure, the auxiliary platform is connected to the inner frame in a detachable manner, and a passage opening is arranged on the inner frame and is opposite to the notch arranged on the auxiliary platform; When in use, the staircase steel plate structure to be welded is installed in the channel opening provided on the internal frame and the groove provided on the auxiliary platform, and the installer performs welding on the installation platform; The stair slab to be welded is supported by a support sliding group, a sliding docking group is arranged on the installation platform, the sliding docking group includes a support sliding group and a support positioning group, the support sliding group includes a first platform connected to the installation platform by sliding, and hydraulic support rods arranged in a matrix on the first platform; When the above structure is used, the stair slab steel plate structure to be welded is supported on the installation platform by the support sliding group, and a support plate is provided on the hydraulic support rod of the support sliding group, and the support plate is in contact with and supports the stair slab steel plate structure to be welded. When the above structure is used, two symmetrical groups of first platforms are arranged on the mounting platform, and the hydraulic support rods are arranged on the first platform at intervals. The supporting positioning group includes a second platform slidably connected to the mounting platform. The second platform is connected to a fixed pressure plate via an electric cylinder. The fixed pressure plate is protruding outwardly close to the side of the auxiliary platform, and a positioning hole is provided on the protruding part of the fixed pressure plate. When the above structure is used, after the support plate is provided on the hydraulic support rod of the support sliding group to support and weld the stair plate steel plate structure to be welded, on the side of the stair plate steel plate structure to be welded close to the support positioning group, the second platform is moved close to the stair plate steel plate structure to be welded, and the stair plate steel plate structure to be welded is crimped and fixed by the fixed pressure plate on the electric cylinder; When fixing, the fixing bolts are provided with positioning holes on the outwardly protruding part of the fixed pressure plate and matched with the bolt holes provided on the mounting platform for fixing.

Images