Large-span steel truss structure welding tool and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a large-span steel truss structure welding tool and a construction method.The large-span steel truss structure welding tool comprises a sleeving frame, the sleeving frame is installed at the to-be-welded splicing position of a first steel truss girder and a second steel truss girder, the sleeving frame comprises two sets of buckle plates, each set of buckle plates comprises two buckle plates, and the two buckle plates are connected through a connecting angle plate; connecting plates are integrally formed at the two ends of the buckle plates, the two connecting plates on the same side of the two sets of buckle plates are connected through the connecting buckle plates in an inserted mode, inserting blocks are connected to the surfaces of the connecting buckle plates in an inserted mode, and one ends of the inserting blocks are connected to the surfaces of the connecting buckle plates in an inserted mode; the large-span steel truss structure welding tool and the construction method have the beneficial effects that the sleeving frame comprises the two sets of buckle plates, and the buckle plates in each set are connected through the connecting angle plates and can be conveniently buckled to the to-be-welded splicing positions of the first steel truss girder and the second steel truss girder. Due to the design of the connecting angle plate, the transition angle plate and the limiting angle plate, the contact area between the buckle plate and the steel truss girder is increased, and the fixing stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a welding tool for a large-span steel truss structure and a construction method. Background Art

[0002] In the construction of large-span steel truss structures, welding between steel truss beams is a key step. Traditional welding tools often have problems such as inconvenient installation, limited welding operation space, difficult cleaning before welding, and poor weld cooling effect after welding. Especially in large-span steel truss structures, the welding process is more complicated and difficult due to the large size and heavy weight of the steel truss beams.

[0003] Traditional welding tools may not be able to effectively fix the steel truss beam, resulting in lateral deviation during welding, which affects the welding quality. In addition, the cleaning work before welding often relies on manual labor, which is inefficient and difficult to ensure the cleaning effect. After welding, the temperature of the weld is high. If it is not cooled down in time, it may cause the weld to deform or crack. Summary of the invention

[0004] The object of the present invention is to provide a large-span steel truss structure welding tool and construction method to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-span steel truss structure welding tool, comprising a sleeve frame, which is installed at the joint of steel truss beam one and steel truss beam two to be welded, and the sleeve frame comprises two groups of buckle plates, each group of buckle plates is provided with two buckle plates, the two buckle plates are connected by a connecting angle plate, and both ends of the buckle plates are integrally formed with connecting plates, and the two connecting plates on the same side of the two groups of buckle plates are plugged into the connecting buckle plates, and the surfaces of the connecting buckle plates are plugged with plug blocks, one end of the plug block is plugged into the surface of the connecting buckle plates, and one end of the connecting buckle plates is integrally formed with an extension plate, and the surface of the extension plate is screwed with a screw, and the bottom end of the screw rests on the surface of steel truss beam one, and an air collecting cavity is opened on the surface of the buckle plate, and a plurality of air diffusion holes are opened on the surface of the air collecting cavity, and a sealing plate is fixed to the notch of the air collecting cavity, and an air pump is fixed on the surface of the buckle plate, and an air injection pipe is installed at the air outlet end of the air pump, and one end of the air injection pipe is plugged into the air collecting cavity.

[0006] Preferably, the steel truss beam one and the steel truss beam two are both in an "I"-shaped plate structure, the end face dimensions of the steel truss beam one and the steel truss beam two are the same, the gusset plates are in an open "concave"-shaped plate structure, the two groups of gusset plates are symmetrically distributed about the steel truss beam one, and the two gusset plates of each group are distributed in parallel.

[0007] Preferably, a transition angle plate is fixed to the inner angle surface of the connecting angle plate, and limiting angle plates are fixed to both ends of the transition angle plate. The connecting angle plate, the transition angle plate and the limiting angle plate are all "L"-shaped plate structures. The inner angle surface of the connecting angle plate is fixed to the outer angle surface of the buckle plate. After the buckle plate is buckled on one side of the steel truss beam one, the limiting angle plate is buckled on one side of the steel truss beam one. At this time, a gap is reserved between the inner angle surface of the transition angle plate and the steel truss beam one.

[0008] Preferably, the connecting plate is a square plate-like structure, a notch is provided at one end of the connecting plate, the connecting buckle plate is a "U"-shaped plate-like structure, the groove body of the connecting buckle plate is buckled in the notch, the two connecting plates are located between two parallel side plates of the connecting buckle plate, and sliding bars are fixed on the two parallel side plates of the connecting buckle plate, the sliding bar is slidably connected in the guide groove, and the guide groove is provided on the surface of the connecting plate.

[0009] Preferably, an embedding groove is opened in the groove body of the connecting buckle plate, and a rubber clamp is fixed on the surface of the embedding groove. The thickness of the rubber clamp is less than the depth of the embedding groove. After the connecting buckle plate is buckled in the missing groove and the plug is inserted into the surface of the connecting buckle plate, the rubber clamp is clamped between the connecting buckle plate and the missing groove to produce elastic deformation.

[0010] Preferably, a mounting opening is provided on the surface of the connecting plate, and the mounting opening is a "convex" shaped groove, the groove size of the end of the mounting opening away from the missing groove is larger than the groove size of the other end of the missing groove, the plug block is a "T" shaped column structure, one end of the plug block passes through the mounting opening and is inserted into the positioning groove, the positioning groove is provided on the surface of the connecting buckle plate, the height of the plug block is smaller than the height of the mounting opening, a traction piece is fixed at the end of the plug block away from the positioning groove, the plate surface size of the traction piece is smaller than the groove size of one end of the mounting opening, two elastic bands are fixed on the side of the traction piece away from the plug block, the two elastic bands are parallel, and the two ends of the two elastic bands are respectively fixed on two parallel side walls of the mounting opening, a pull ring is fixed on the surface of the traction piece, and the pull ring is located between the two elastic bands.

[0011] Preferably, finger grooves are provided on both sides of the connecting buckle plate, the thickness of the extension plate is equal to the thickness of the connecting buckle plate, screw holes are provided on the surface of the extension plate, screw rods penetrate and are screwed into the screw holes, a pressure block is fixed to the bottom end of the screw rod, and a rubber gasket is fixed to the bottom surface of the pressure block. After the two sets of buckle plates are sleeved on the steel truss beam one and the steel truss beam two, the screw rod is screwed to push the pressure block against the surface of the steel truss beam one, and the rubber gasket is elastically deformed under pressure.

[0012] Preferably, the groove contour of the air collecting cavity is the same as the frame contour of the buckle plate, the sealing plate blocks the groove of the air collecting cavity, and a plurality of air diffusion holes are provided. The plurality of air diffusion holes are arranged and distributed along the contour of the air collecting cavity. The air diffusion holes are in the form of trumpet holes, and the aperture of the end of the air diffusion hole away from the air collecting cavity is larger than the aperture of the end of the air diffusion hole close to the air collecting cavity.

[0013] Preferably, an air intake pipe is installed at the air inlet end of the air pump. After the air pump is started, air is sucked out through the air intake pipe and injected into the air collecting cavity through the air injection pipe, and the gas inside the air collecting cavity is dispersed through the air dispersion holes.

[0014] A construction method for a large-span steel truss structure welding tool, the method comprising the following steps:

[0015] After one end of the two steel truss beams 2 are fixed to the column structures at both ends, the steel truss beam 1 is hoisted between the two steel truss beams 2, and the steel truss beam 1 is straightened. At this time, the two ends of the steel truss beam 1 are aligned with the two steel truss beams 1, and two sets of buckle plates are buckled from both sides of the joint of the steel truss beam 1 and the steel truss beam 2;

[0016] Then, the connecting gusset plate is inserted into the two connecting plates to realize the connection of the two sets of gusset plates. At this time, the two sets of gusset plates after connection form a temporary connection structure at the joint of the steel truss beam 1 and the steel truss beam 2, that is, the place where the steel truss beam 1 and the steel truss beam 2 are to be welded;

[0017] Use the welding torch of the welding equipment to weld and reinforce the joints of the steel truss beam 1 and the steel truss beam 2. The gusset plate serves as an auxiliary connection and limiting structure of the welding tooling.

[0018] After the air pump switch is triggered, the air pump supplies air to the air collecting chamber and then disperses the air through the air diffusion holes. The dispersed gas blows the weld at the joint of the steel truss beam 1 and the steel truss beam 2 to cool the welding point. If the air pump is started before welding, the dust or particles at the joint of the steel truss beam 1 and the steel truss beam 2 can be blown away and cleaned.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The welding tooling and construction method of a large-span steel truss structure proposed in the present invention comprises a set frame including two groups of gusset plates, each group of gusset plates is connected by a connecting angle plate, and can be conveniently buckled at the joint of the steel truss beam one and the steel truss beam two to be welded. The design of the connecting angle plate, the transition angle plate and the limiting angle plate not only increases the contact area between the gusset plate and the steel truss beam, but also improves the stability of the fixation. At the same time, the design of the connecting gusset plate and the plug block allows the two groups of gusset plates to be firmly connected together, avoiding the side deviation phenomenon during the welding process. The air collecting cavity and the air diffusion holes opened on the surface of the gusset plate, as well as the matching air pump, can clean the joint before welding, remove particulate matter, debris and dust, and ensure the welding quality. After welding, the air pump can inject air into the air collecting cavity, and disperse air through the air diffusion holes to blow and cool the weld to avoid deformation or cracking of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2It is a schematic diagram of the connection structure of two sets of gusset plates of the present invention;

[0023] Figure 3 for Figure 2 Top view of the structure;

[0024] Figure 4 for Figure 3 Structural cross-section view at AA in the middle;

[0025] Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 6 It is a schematic diagram of the connection structure of two gusset plates of the present invention;

[0027] Figure 7 for Figure 6 Front view of the middle structure;

[0028] Figure 8 for Figure 7 Structural cross-section view at the middle BB;

[0029] Fig. 9 This is a schematic diagram of the bottom structure after the connecting angle plate, transition angle plate and limiting angle plate of the present invention are connected;

[0030] Fig.10 This is a schematic diagram of the connection structure of the connecting buckle plate and the extension plate of the present invention;

[0031] Fig.11 for Figure 1 Top view of the structure;

[0032] Fig.12 for Fig.11 Structural cross-section view at CC;

[0033] Fig.13 for Fig.12 A magnified schematic diagram of the structure at B in the middle;

[0034] Fig.14 for Figure 1 Side view of the middle structure;

[0035] Fig.15 for Fig.14 Structural cross-section view at DD in the middle;

[0036] Fig.16 for Fig.15 Enlarged schematic diagram of the structure at point C in the middle.

[0037] In the figure: gusset plate 1, steel truss beam 1 2, steel truss beam 2 3, connecting angle plate 4, transition angle plate 5, limiting angle plate 6, connecting plate 7, missing groove 8, connecting gusset plate 9, guide groove 10, slide bar 11, installation opening 12, plug block 13, positioning groove 14, traction piece 15, elastic band 16, pull ring 17, finger groove 18, extension plate 19, screw hole 20, screw rod 21, pressure block 22, rubber gasket 23, air collecting cavity 24, sealing plate 25, air diffusion hole 26, air pump 27, air injection pipe 28, air suction pipe 29, embedded groove 30, rubber clamp block 31. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] For example, see Figures 1 to 16 The present invention provides a technical solution: a large-span steel truss structure welding tool, including a set frame, the set frame is installed at the joint of the steel truss beam 1 2 and the steel truss beam 3 to be welded, the set frame includes two groups of gusset plates 1, each group of gusset plates 1 is provided with two, the two gusset plates 1 are connected by a connecting angle plate 4, the steel truss beam 1 2 and the steel truss beam 2 3 are both in the shape of an "I" plate, the end surface dimensions of the steel truss beam 1 2 and the steel truss beam 2 3 are the same, the gusset plate 1 is in the shape of an "concave" plate, and the two groups of gusset plates 1 are about the steel The truss beam 2 is symmetrically distributed, and the two gusset plates 1 of each group of gusset plates 1 are distributed in parallel; the inner angle surface of the connecting angle plate 4 is fixed with a transition angle plate 5, and both ends of the transition angle plate 5 are fixed with a limiting angle plate 6. The connecting angle plate 4, the transition angle plate 5 and the limiting angle plate 6 are all "L"-shaped plate structures. The inner angle surface of the connecting angle plate 4 is fixed on the outer angle surface of the gusset plate 1. After the gusset plate 1 is buckled on one side of the steel truss beam 2, the limiting angle plate 6 is buckled on one side of the steel truss beam 2. At this time, a gap is reserved between the inner angle surface of the transition angle plate 5 and the steel truss beam 2.

[0040] When in use, in order to facilitate the installation of the two sets of buckle plates 1 at the joint of the steel truss beam 1 and the steel truss beam 2, a welding operation space is reserved; after one end of the two steel truss beams 2 3 is respectively fixed to the column structures at both ends, the steel truss beam 1 2 is hoisted between the two steel truss beams 2 3, and the steel truss beam 1 2 is straightened. At this time, the two ends of the steel truss beam 1 2 are respectively aligned with the two steel truss beams 2, and the two sets of buckle plates 1 are respectively buckled from both sides of the joint of the steel truss beam 1 and the steel truss beam 2 3. At this time, the two sets of limiting angle plates 6 are respectively against the surface of the steel truss beam 1 2 and the steel truss beam 2 3, and the transition angle plates 5 are connected Two limiting angle plates 6, and the gap between the transition angle plate 5 and the steel truss beam 1 2 is used to introduce the gun head of the welding gun. The steel truss beam 1 2 and the steel truss beam 2 3 are welded at the joint between the two limiting angle plates 6, and the connecting angle plate 4 connects the two connecting angle plates 4, which plays a traction role between the two buckle plates 1. When the two sets of buckle plates 1 are buckled and fixed at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 to be welded, the connecting angle plate 4 serves as a lateral force-bearing structure for temporarily connecting the steel truss beam 1 2 and the steel truss beam 2 3 to avoid lateral deviation when the steel truss beam 1 2 and the steel truss beam 2 3 are not welded.

[0041] The two ends of the gusset plate 1 are integrally formed with a connecting plate 7. The two connecting plates 7 on the same side of the two groups of gusset plates 1 are plugged into the connecting gusset plate 9. The surface of the connecting gusset plate 9 is plugged with an insert block 13, and one end of the insert block 13 is plugged into the surface of the connecting gusset plate 9. The connecting plate 7 is a square plate structure, and one end of the connecting plate 7 is provided with a notch 8. The connecting gusset plate 9 is a "U"-shaped plate structure. The groove body of the connecting gusset plate 9 is buckled in the notch 8. The two connecting plates 7 are between the two parallel side plates of the connecting gusset plate 9, and the two parallel side plates of the connecting gusset plate 9 are fixed with a slide bar 11. The slide bar 11 is slidably connected to the guide groove 10, and the guide groove 10 is provided on the surface of the connecting plate 7; an embedding groove 30 is provided in the groove body of the connecting gusset plate 9, and a rubber clamping block 31 is fixed on the surface of the embedding groove 30. The thickness of the rubber clamping block 31 is less than the depth of the embedding groove 30. After the connecting gusset plate 9 is buckled in the notch 8 and the insert block 13 is plugged into the surface of the connecting gusset plate 9, the rubber The clamping block 31 is clamped between the connecting buckle plate 9 and the missing groove 8 to produce elastic deformation; a mounting opening 12 is provided on the surface of the connecting plate 7, and the mounting opening 12 is a "convex" shaped groove. The slot size of the end of the mounting opening 12 away from the missing groove 8 is larger than the slot size of the other end of the missing groove 8. The plug-in block 13 is a "T" shaped column structure. One end of the plug-in block 13 passes through the mounting opening 12 and is inserted into the positioning groove 14. The positioning groove 14 is provided on the surface of the connecting buckle plate 9. The height of the plug-in block 13 is less than the height of the mounting opening 12. A traction piece 15 is fixed at one end of the plug-in block 13 away from the positioning groove 14. The plate size of the traction piece 15 is smaller than the slot size at one end of the mounting opening 12. Two elastic bands 16 are fixed on one side of the traction piece 15 away from the plug-in block 13. The two elastic bands 16 are parallel, and the two ends of the two elastic bands 16 are respectively fixed on two parallel side walls of the mounting opening 12. A pull ring 17 is fixed on the surface of the traction piece 15, and the pull ring 17 is located between the two elastic bands 16.

[0042] When in use, in order to fix the two sets of buckle plates 1 at the joint of the steel truss beam 1 2 and the steel truss beam 2 3, after the two sets of buckle plates 1 are buckled at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 to be welded, two fingers of one hand respectively hook the two pull rings 17, pull out the pull rings 17, and the pull rings 17 drive the corresponding traction pieces 15 to move. When the traction pieces 15 move, the tensioning elastic band 16 produces elastic deformation, and the traction piece 15 pulls the plug block 13 into the installation opening 12. The two fingers of the other hand are respectively pinched in the finger grooves 18 on both sides of the connecting buckle plate 9, and the connecting buckle plate 9 is pushed into the notch 8 of the two connecting plates 7 until The rubber clamp 31 is tightly squeezed between the notch 8 and the groove body of the connecting buckle plate 9. At this time, the traction plate 15 is pushed down, and the traction plate 15 pushes one end of the plug block 13 into the positioning groove 14 to fix the connecting buckle plate 9. At this time, the connecting buckle plate 9 is buckled at the joint of the two connecting plates 7 to connect and fix the two connecting plates 7, and the elastic band 16 rebounds and resets to limit the plug block 13 inside the installation port 12 to prevent the plug block 13 from bumping in the installation port 12; and when the connecting buckle plate 9 is pushed into the notch 8, the slide bar 11 slides into the guide groove 10 to guide the connecting buckle plate 9 and the notch 8 when they are spliced.

[0043] An extension plate 19 is integrally formed at one end of the connecting buckle plate 9, and a screw 21 is screwed on the surface of the extension plate 19, and the bottom end of the screw 21 is against the surface of the steel truss beam 2. Finger grooves 18 are provided on both sides of the connecting buckle plate 9. The thickness of the extension plate 19 is equal to the thickness of the connecting buckle plate 9. A screw hole 20 is provided on the surface of the extension plate 19, and the screw 21 passes through and is screwed on the screw hole 20. A pressure block 22 is fixed to the bottom end of the screw 21, and a rubber gasket 23 is fixed to the bottom surface of the pressure block 22. After the two sets of buckle plates 1 are sleeved on the steel truss beam 2 and the steel truss beam 3, the screw 21 is screwed to push the pressure block 22 against the surface of the steel truss beam 2. At this time, the rubber gasket 23 is compressed and produces elastic deformation.

[0044] When in use, in order to increase the firmness of the gusset plate 1 installed at the joint of the steel truss beam 1 2 and the steel truss beam 2 3; after the two groups of gusset plates 1 are assembled and sleeved on the joint of the steel truss beam 2 and the steel truss beam 2 3 to be welded, and the two groups of gusset plates 1 are fixed by the connecting plate 7 and the connecting gusset plate 9, the screw 21 is screwed and pushed in the direction of the steel truss beam 2 until the rubber gasket 23 is squeezed and pushed by the screw 21 and tightly clamped between the steel truss beam 2 and the pressure block 22. At this time, the friction between the gusset plate 1 and the steel truss beam 2 is increased to prevent the gusset plate 1 from sliding sideways on the steel truss beam 2, that is, the connecting gusset plate 9 not only realizes the connection and fixation of the connecting plate 7 at the end of the two groups of gusset plates 1, but also cooperates with the extension plate 19 and the screw 21 to complete the anti-deviation limit of the gusset plate 1 on the steel truss beam 2.

[0045] The surface of the gusset plate 1 is provided with a gas collecting cavity 24, and the surface of the gas collecting cavity 24 is provided with a plurality of air diffusion holes 26, and a sealing plate 25 is fixed to the notch of the gas collecting cavity 24, and an air pump 27 is fixed to the surface of the gusset plate 1, and an air injection pipe 28 is installed at the air outlet end of the air pump 27, and one end of the air injection pipe 28 is plugged into the gas collecting cavity 24, and the groove body contour of the gas collecting cavity 24 is the same as the frame body contour of the gusset plate 1, and the sealing plate 25 blocks the notch of the gas collecting cavity 24, and the air diffusion holes 26 There are multiple air diffusion holes 26 arranged and distributed along the contour of the air collecting cavity 24. The air diffusion holes 26 are trumpet-shaped. The aperture of the air diffusion hole 26 at one end away from the air collecting cavity 24 is larger than the aperture of the air diffusion hole 26 at one end close to the air collecting cavity 24. An air intake pipe 29 is installed at the air inlet end of the air pump 27. After the air pump 27 is started, air is sucked through the air intake pipe 29 and injected into the air collecting cavity 24 through the air injection pipe 28. The gas inside the air collecting cavity 24 is dispersed through the air diffusion holes 26.

[0046] When in use, in order to clean the joint of the steel truss beam 1 2 and the steel truss beam 2 3 before welding, and to cool the weld after welding; when the two sets of gusset plates 1 are assembled and fixed at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 to be welded, the switch of the air pump 27 is first triggered for the first time, and the air pump 27 sucks the surrounding air through the suction pipe 29 and injects it into the air collecting cavity 24 through the air injection pipe 28. The air collecting cavity 24 is a narrow The air injected into the air collecting chamber 24 is dispersed through the air diffusion holes 26, and the dispersed air removes the particles or other debris and dust at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 to be welded, so as to avoid the presence of debris at the welding joint and affecting the welding quality; when the joint of the steel truss beam 1 2 and the steel truss beam 2 3 is welded, the switch of the air pump 27 is triggered again, and the air injected into the air collecting chamber 24 by the air pump 27 is dispersed through the air diffusion holes 26 and then blows on the welding joint to cool it down.

[0047] Embodiment 2, based on embodiment 1, proposes a construction method of a large-span steel truss structure welding tooling, the method comprising the following steps:

[0048] After one end of the two steel truss beams 2 3 is fixed to the column structures at both ends, the steel truss beam 1 2 is hoisted between the two steel truss beams 2 3, and the steel truss beam 1 2 is straightened. At this time, the two ends of the steel truss beam 1 2 are aligned with the two steel truss beams 1 2, and two sets of buckle plates 1 are buckled from both sides of the joint of the steel truss beam 1 2 and the steel truss beam 2 3;

[0049] Then, the connecting buckle plate 9 is inserted into the two connecting plates 7 to realize the connection of the two sets of buckle plates 1. At this time, the two sets of buckle plates 1 after connection are connected at the joint of the steel truss beam 1 2 and the steel truss beam 2 3, that is, the steel truss beam 1 2 and the steel truss beam 2 3 to be welded to form a temporary connection structure;

[0050] Use the welding gun of the welding equipment to weld and reinforce the joints of the steel truss beam 1 2 and the steel truss beam 2 3. The gusset plate 1 is used as an auxiliary connection and limiting structure of the welding tooling.

[0051] After the switch of the air pump 27 is triggered, the air pump 27 supplies air to the air collecting chamber 24 and then disperses the air through the air diffusion holes 26. The dispersed gas blows the weld at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 to cool the welding point. If the air pump 27 is started before welding, the dust or particles at the joint of the steel truss beam 1 2 and the steel truss beam 2 3 can be blown away and cleaned.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tool for a large-span steel truss structure, comprising a sleeve frame, the sleeve frame being installed at a joint of a steel truss beam 1 (2) and a steel truss beam 2 (3) to be welded, characterized in that: The set frame comprises two groups of gusset plates (1), each group of gusset plates (1) is provided with two gusset plates (1), the two gusset plates (1) are connected by a connecting angle plate (4), and both ends of the gusset plates (1) are integrally formed with connecting plates (7), the two connecting plates (7) on the same side of the two groups of gusset plates (1) are plugged into the connecting gusset plate (9), the surface of the connecting gusset plate (9) is plugged with an insert block (13), one end of the insert block (13) is plugged into the surface of the connecting gusset plate (9), one end of the connecting gusset plate (9) is integrally formed with an extension plate (19), and the extension plate (19) is integrally formed with the outer A screw rod (21) is screwed onto the surface of the extension plate (19), the bottom end of the screw rod (21) is against the surface of the steel truss beam (2), an air collecting cavity (24) is provided on the surface of the gusset plate (1), a plurality of air diffusion holes (26) are provided on the surface of the air collecting cavity (24), a sealing plate (25) is fixed to the notch of the air collecting cavity (24), an air pump (27) is fixed to the surface of the gusset plate (1), an air injection pipe (28) is installed at the air outlet end of the air pump (27), and one end of the air injection pipe (28) is inserted into the air collecting cavity (24).

2. The large-span steel truss structure welding tool according to claim 1, characterized in that: The steel truss beam one (2) and the steel truss beam two (3) are both in the form of an "I"-shaped plate structure, the end surface dimensions of the steel truss beam one (2) and the steel truss beam two (3) are the same, the gusset plates (1) are in the form of an open "concave"-shaped plate structure, the two groups of gusset plates (1) are symmetrically distributed about the steel truss beam one (2), and the two gusset plates (1) of each group of gusset plates (1) are distributed in parallel.

3. The large-span steel truss structure welding tool according to claim 1, characterized in that: The inner angle surface of the connecting angle plate (4) is fixed with a transition angle plate (5), and both ends of the transition angle plate (5) are fixed with limiting angle plates (6). The connecting angle plate (4), the transition angle plate (5) and the limiting angle plate (6) are all in an "L"-shaped plate structure. The inner angle surface of the connecting angle plate (4) is fixed to the outer angle surface of the buckle plate (1). After the buckle plate (1) is buckled on one side of the steel truss beam (2), the limiting angle plate (6) is buckled on one side of the steel truss beam (2). At this time, a gap is reserved between the inner angle surface of the transition angle plate (5) and the steel truss beam (2).

4. The large-span steel truss structure welding tool according to claim 1, characterized in that: The connecting plate (7) is a square plate-like structure, one end of the connecting plate (7) is provided with a notch (8), the connecting buckle plate (9) is a "U"-shaped plate-like structure, the groove body of the connecting buckle plate (9) is buckled in the notch (8), the two connecting plates (7) are located between two parallel side plates of the connecting buckle plate (9), and the two parallel side plates of the connecting buckle plate (9) are both fixed with a slide bar (11), the slide bar (11) is slidably connected in the guide groove (10), and the guide groove (10) is provided on the surface of the connecting plate (7).

5. The large-span steel truss structure welding tool according to claim 1, characterized in that: The groove body of the connecting buckle plate (9) is provided with an embedding groove (30), and a rubber clamping block (31) is fixed on the surface of the embedding groove (30). The thickness of the rubber clamping block (31) is less than the depth of the embedding groove (30). After the connecting buckle plate (9) is buckled in the notch (8) and the plug-in block (13) is plugged into the surface of the connecting buckle plate (9), the rubber clamping block (31) is clamped between the connecting buckle plate (9) and the notch (8) to generate elastic deformation.

6. The large-span steel truss structure welding tool according to claim 1, characterized in that: The surface of the connecting plate (7) is provided with an installation opening (12), the installation opening (12) is a "convex"-shaped groove, the size of the groove at one end of the installation opening (12) away from the missing groove (8) is larger than the size of the groove at the other end of the missing groove (8), the plug block (13) is a "T"-shaped columnar structure, one end of the plug block (13) passes through the installation opening (12) and is then plugged into the positioning groove (14), the positioning groove (14) is provided on the surface of the connecting buckle plate (9), the height of the plug block (13) is smaller than the height of the installation opening (12), and the plug block (13) A traction piece (15) is fixed to one end away from the positioning groove (14), the plate size of the traction piece (15) is smaller than the slot size of one end of the installation opening (12), two elastic bands (16) are fixed to one side of the traction piece (15) away from the plug block (13), the two elastic bands (16) are parallel, and the two ends of the two elastic bands (16) are respectively fixed to two parallel side walls of the installation opening (12), and a pull ring (17) is fixed to the surface of the traction piece (15), and the pull ring (17) is located between the two elastic bands (16).

7. The large-span steel truss structure welding tool according to claim 1, characterized in that: Finger grooves (18) are provided on both sides of the connecting buckle plate (9), the thickness of the extension plate (19) is equal to the thickness of the connecting buckle plate (9), a screw hole (20) is provided on the surface of the extension plate (19), a screw rod (21) passes through and is screwed into the screw hole (20), a pressure block (22) is fixed at the bottom end of the screw rod (21), and a rubber gasket (23) is fixed on the bottom surface of the pressure block (22), after the two sets of buckle plates (1) are sleeved on the steel truss beam one (2) and the steel truss beam two (3), the screw rod (21) is screwed to push the pressure block (22) against the surface of the steel truss beam one (2), and at this time, the rubber gasket (23) is compressed to produce elastic deformation.

8. The large-span steel truss structure welding tool according to claim 1, characterized in that: The groove body contour of the gas collecting cavity (24) is the same as the frame body contour of the buckle plate (1); the sealing plate (25) blocks the groove opening of the gas collecting cavity (24); a plurality of air diffusion holes (26) are provided; the plurality of air diffusion holes (26) are arranged and distributed along the contour of the gas collecting cavity (24); the air diffusion holes (26) are in the shape of trumpet holes; and the aperture of one end of the air diffusion holes (26) away from the gas collecting cavity (24) is larger than the aperture of one end of the air diffusion holes (26) close to the gas collecting cavity (24).

9. The large-span steel truss structure welding tool according to claim 1, characterized in that: An air intake pipe (29) is installed at the air inlet end of the air pump (27). After the air pump (27) is started, air is sucked through the air intake pipe (29) and injected into the air collecting cavity (24) through the air injection pipe (28). The gas inside the air collecting cavity (24) is dispersed through the air dispersion holes (26).

10. A construction method of a large-span steel truss structure welding tool as described in any one of claims 1 to 9, characterized in that: The method comprises the following steps: After one end of the two steel truss beams (3) are respectively fixed to the column structures at the two ends, the steel truss beam (2) is hoisted between the two steel truss beams (3), and the steel truss beam (2) is straightened. At this time, the two ends of the steel truss beam (2) are respectively aligned with the two steel truss beams (2), and the two sets of buckle plates (1) are buckled from both sides of the joint of the steel truss beam (2) and the steel truss beam (3); Then, the connecting buckle plate (9) is inserted into the two connecting plates (7) to realize the connection of the two sets of buckle plates (1). At this time, the two sets of buckle plates (1) after connection form a temporary connection structure at the joint of the steel truss beam 1 (2) and the steel truss beam 2 (3), that is, the place where the steel truss beam 1 (2) and the steel truss beam 2 (3) are to be welded; The welding torch of the welding equipment is used to weld and reinforce the joint of the steel truss beam 1 (2) and the steel truss beam 2 (3), and the gusset plate (1) is used as an auxiliary connection and limiting structure of the welding tool. After the switch of the air pump (27) is triggered, the air pump (27) delivers air to the air collecting chamber (24) and then releases the air through the air diffusion holes (26). The released air blows the weld at the joint of the first steel truss beam (2) and the second steel truss beam (3), thereby cooling the weld. If the air pump (27) is started before welding, dust or particles at the joint of the first steel truss beam (2) and the second steel truss beam (3) can be blown away and cleaned.

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