CN114871644A

CN114871644A - Steel structure welding device for realizing fixed limiting according to gravity and using method thereof

Info

Publication number: CN114871644A
Application number: CN202210503838.7A
Authority: CN
Inventors: 谢进盛; 吴锦华; 黄彬
Original assignee: Zhangzhou Zhongcheng Investment Construction Technology Co ltd
Current assignee: Zhangzhou Zhongcheng Investment Construction Technology Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-09

Abstract

The invention discloses a steel structure welding device for realizing fixed limiting according to gravity and a using method thereof, belonging to the technical field of steel structure welding and comprising a workbench, a bracket arranged on the upper surface of the workbench and a welding main body arranged on the lower surface of the bracket, wherein the upper surface of the workbench is provided with a channel, and an electric push rod is arranged in the channel; this realize fixed spacing steel construction welding set and application method according to gravity, through setting up splint and stripper plate, utilize the stripper plate to control the mounted position of steel construction, utilize the effect of steel construction self gravity, move down the stripper plate, the bracing piece is at the elongated slot within the downstream at this moment, when the bracing piece removed the position with circular port matched with, splint receive the reaction force drive fly leaf of spring one and be close to the both ends of steel construction on the bracing piece, and then fix the steel construction, and the operation is convenient, moreover, the steam generator is simple in structure, bring very big convenience for the staff.

Description

Steel structure welding device for realizing fixed limiting according to gravity and using method thereof

Technical Field

The invention relates to the field of steel structure welding, in particular to a steel structure welding device for realizing fixed limiting according to gravity and a using method thereof.

Background

The steel structure is a structure formed by steel materials and mainly comprises steel beams, steel columns, steel trusses and other members which are made of section steel, steel plates and the like, all the members or components are usually connected by welding seams, bolts or rivets, and because the dead weight is light, the steel has the characteristics of high strength, light dead weight, good integral rigidity and strong deformation resistance, so the steel is particularly suitable for building large-span, ultrahigh and overweight buildings, has good material homogeneity and isotropy, belongs to an ideal elastomer, best meets the basic assumption of general engineering mechanics, has good plasticity and toughness, can have larger deformation, can well bear power load, has short construction period, the industrial degree is high, the specialized production with high mechanization degree can be carried out, and when the welding device is used, the steel structure is always required to be welded.

The existing steel structure needs to be fixed to the steel structure through complex procedures during welding, so that the steel structure is inconvenient to be quickly fixed, and when time is short, workers can easily make mistakes during fixing, so that the steel structure cannot be stably fixed, and great convenience is brought to the workers.

Disclosure of Invention

The invention provides a steel structure welding device for realizing fixed limiting according to gravity and a using method thereof, and solves the problems that the steel structure needs to be fixed through a complicated process in the welding process of the existing steel structure, the steel structure is inconvenient to be fixed quickly, and when the time is short, an error is easy to occur in the fixing process of a worker, so that the steel structure cannot be fixed stably, and great convenience is brought to the worker.

In order to achieve the purpose, the invention adopts the following technical scheme: a steel structure welding device for realizing fixed limiting according to gravity and a using method thereof comprise a workbench, a bracket arranged on the upper surface of the workbench, and a welding main body arranged on the lower surface of the bracket, wherein a channel is formed in the upper surface of the workbench, an electric push rod is arranged in the channel, a movable plate is arranged on an output shaft of the electric push rod, two groups of first grooves are formed in the upper surface of the movable plate, the number of each group of first grooves is two, two second grooves are formed in the upper surface of the movable plate, two grooves are positioned between the two first grooves in the same group, a slide rod is arranged in each first groove, a slide plate is slidably arranged on each slide rod, a U-shaped clamping plate is arranged on the upper surface of each slide plate, a first spring is sleeved on each slide rod, the two ends of the first spring are respectively fixedly connected with the slide plate and the first grooves, and a second spring is arranged on the inner bottom surface of each second groove, the other end of the second spring is provided with an L-shaped extrusion plate, a support rod is arranged on the side face of the extrusion plate, a movable plate is arranged on the lower surface of the clamping plate and located in the second groove, a circular hole and an elongated slot are formed in the movable plate, one end of the support rod is located in the elongated slot, and the elongated slot is communicated with the circular hole.

In the above scheme, it should be noted that the electric push rod, the fan and the welding main body are all electrically connected with an external power supply.

As a preferred scheme of the invention, a protective telescopic sleeve is sleeved outside the electric push rod, two ends of the protective telescopic sleeve are respectively and fixedly connected with the movable plate and the channel, limiting plates are respectively mounted on the left side surface and the right side surface of the movable plate, limiting grooves are respectively formed in the left side surface and the right side surface of the inner wall of the channel, and one end of each limiting plate is slidably mounted in each limiting groove.

As a preferable scheme of the invention, L-shaped plates are respectively arranged at the left side and the right side of the lower surface of the workbench, transverse plates are arranged on the upper surface of the transverse part of each L-shaped plate, a material receiving frame is arranged between the two transverse plates, and the material receiving frame is positioned below the channel.

According to a preferable scheme of the invention, a telescopic rod is arranged in the second spring, the telescopic rod is arranged on the inner bottom surface of the second groove, a telescopic shaft of the telescopic rod is fixedly connected with the extrusion plate, the interception plate is arranged on the lower surface of the workbench, and the rear side surface of the material receiving frame is abutted against the interception plate.

According to a preferable scheme of the invention, fixing plates are respectively installed on the left side surface and the right side surface of the support, the same U-shaped acrylic baffle is arranged below the two fixing plates, a third spring is installed on each of the left side surface and the right side surface of the lower surface of the acrylic baffle, the other end of the third spring is fixedly connected with a workbench, two winding discs are installed on the upper surface of the workbench, two pull ropes are installed on the upper surface of the acrylic baffle, one end of each pull rope penetrates through a guide wheel installed on the fixing plate, one end of each pull rope is wound on the winding disc, and a fixing assembly is arranged on each winding disc.

As a preferable scheme of the present invention, the fixing assembly includes a rotating plate installed on a front side surface of the winding disc, a plug pin is installed on the rotating plate in a sliding and penetrating manner, a plurality of slots are formed on the front side surface of the winding disc, and one end of the plug pin extends into one of the slots.

As a preferable scheme of the invention, the front side surface of the bracket is provided with a conveying pipe, the front side surface of the conveying pipe is communicated and provided with a plurality of air suction pipes, the rear side surface of the bracket is provided with a fan, the inlet air of the fan passes through the bracket and is communicated with the conveying pipe, and the air outlet pipe of the fan is provided with a processing assembly.

As a preferable scheme of the invention, the treatment assembly comprises a treatment box arranged on the rear side face of the bracket, an air outlet pipe of the fan penetrates and extends into the treatment box, the right side face of the treatment box is communicated with an exhaust pipe, and an activated carbon filter screen plate positioned between the exhaust pipe and the air outlet pipe of the fan is arranged in the treatment box.

As a preferable scheme of the invention, two limiting rods are arranged on the upper surface of the workbench, one end of each limiting rod penetrates and extends above the acrylic baffle in a sliding manner, a plugging plate is arranged, and the spring is located at the outer side of each limiting rod.

The use method of the steel structure welding device for realizing fixed limiting according to gravity comprises the following steps:

placing a steel structure on the upper surfaces of two extrusion plates, moving the extrusion plates downwards by the gravity of the steel structure, extruding a spring II and a telescopic rod by the extrusion plates to drive a support rod to move downwards, moving one end of the support rod downwards in a long groove, driving a clamping plate to approach the steel structure by the reaction force of a spring I when the support rod moves to a position matched with a circular hole, penetrating a movable plate through the support rod at the moment, sliding the sliding plate on a sliding rod to complete the fixation of the steel structure, pulling one end of a bolt out of a slot, rotating a winding disc clockwise, moving an acrylic baffle downwards by the reaction force of a spring III, inserting one end of the bolt into the slot again when the acrylic baffle abuts against a workbench, starting a fan, a welding main body and an electric push rod, welding the steel structure by the welding main body, and driving the electric push rod to move the movable plate back and forth in a channel, the movable plate drives the limiting plate to slide in the limiting groove when moving, the breathing pipe absorbs the gas that produces when welding, filter the filtration of otter board through the active carbon and then discharge through the drain pipe, guarantee operational environment air's freshness, the piece that produces in welding process drops in connecing the material frame, collect the piece through connecing the material frame, when the piece in the material frame of needs to the needs is cleared up, will connect the material frame to move to the front side, it slides on the L shaped plate to connect the material frame to drive the diaphragm when moving, then alright will connect the material frame to shift out and clear up the piece, when needing to reset the material frame, according to the position of L shaped plate, move the diaphragm to the L shaped plate in, then continue to move and connect the material frame, when connecing the material frame and blocking the board and inconsistent, the position that connects the material frame this moment just installs the accuracy.

In the invention:

according to the steel structure welding device for realizing fixed limiting according to gravity and the using method thereof, the clamping plate and the extrusion plate are arranged, the extrusion plate is used for controlling the installation position of the steel structure, the extrusion plate is moved downwards under the action of the gravity of the steel structure, the supporting rod moves downwards in the long groove at the moment, when the supporting rod moves to the position matched with the circular hole, the clamping plate is driven by the reaction force of the first spring to enable the movable plate to be close to the two ends of the steel structure on the supporting rod, and then the steel structure is fixed, so that the steel structure welding device is convenient to operate, simple in structure and brings great convenience to workers;

according to the steel structure welding device for realizing fixed limiting according to gravity and the using method thereof, the scrap generated during welding is received by arranging the material receiving frame and utilizing the effect of the material receiving frame below the channel, the scrap is prevented from falling to the ground to influence the welding environment of a steel structure, and the effect of the transverse plate and the L-shaped plate is combined, so that the material receiving frame can be conveniently moved out at any time to clean the scrap;

according to the steel structure welding device for realizing fixed limiting according to gravity and the using method thereof, the fan and the conveying pipe are arranged, and gas and smoke gas generated during welding are absorbed through the air suction pipe under the action of the communication between the air inlet pipe of the fan and the conveying pipe, so that the gas is prevented from being sucked into a body by workers to damage the body, the physical and mental health of the workers is protected, the gas is treated under the action of the treatment assembly, and the purification effect is further achieved;

this realize fixed spacing steel construction welding set and application method according to gravity, through the effect that sets up ya keli baffle and stay cord, wrap up the steel construction when welding through ya keli baffle, the firelight that produces when avoiding welding spatters the staff, combines the stay cord to support yakeli baffle, combines the effect of stay cord winding on the winding dish, carries out the lift work to yakeli baffle, combines the effect of spring three, resets yakeli baffle.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is a schematic cross-sectional front view of the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 3B according to the present invention;

FIG. 5 is a schematic diagram showing a sectional structure of a moving plate according to the present invention;

FIG. 6 is an enlarged view of the structure of FIG. 5 at C according to the present invention;

fig. 7 is a rear view cross-sectional structural diagram of the present invention.

In the figure: 1. a work table; 2. a support; 3. moving the plate; 4. an electric push rod; 5. a splint; 6. a bolt; 7. a slide plate; 8. a slide bar; 9. a first spring; 10. a support bar; 11. a pressing plate; 12. a movable plate; 13. a telescopic rod; 14. a second spring; 15. a limiting plate; 16. a protective telescopic sleeve; 17. a fixing plate; 18. pulling a rope; 19. an acrylic baffle plate; 20. a limiting rod; 21. a third spring; 22. a delivery pipe; 23. a fan; 24. a treatment tank; 25. an exhaust pipe; 26. an active carbon filter screen plate; 27. a material receiving frame; 28. an L-shaped plate; 29. a transverse plate; 30. a interception plate; 31. a winding disc; 32. and (6) rotating the plate.

Detailed Description

Examples

Referring to fig. 1-7, the invention provides a steel structure welding device for realizing fixed limit according to gravity and a using method thereof, the steel structure welding device comprises a workbench 1, a bracket 2 arranged on the upper surface of the workbench 1 and a welding main body arranged on the lower surface of the bracket 2, the welding main body is used for welding a steel structure, the upper surface of the workbench 1 is provided with a channel, an electric push rod 4 is arranged in the channel, a moving plate 3 is driven by the electric push rod 4 to move in the channel so as to change the position of the steel structure, an output shaft of the electric push rod 4 is provided with a moving plate 3, the moving plate 3 is used for supporting the steel structure, the upper surface of the moving plate 3 is provided with two groups of grooves one, the number of each group of grooves one is two, the upper surface of the moving plate 3 is provided with two grooves two, the grooves two are positioned between the two grooves one in the same group, a slide bar 8 is arranged in the grooves one, the sliding plate 7 is supported by a sliding rod 8, the sliding plate 7 is slidably mounted on the sliding rod 8, a U-shaped clamping plate 5 is mounted on the upper surface of the sliding plate 7, a first spring 9 is sleeved on the sliding rod 8, two ends of the first spring 9 are fixedly connected with the sliding plate 7 and a first groove respectively, a second spring 14 is mounted on the inner bottom surface of the second groove, the clamping plate is driven by the second spring 14, an L-shaped extrusion plate 11 is mounted at the other end of the second spring 14, a supporting rod 10 is mounted on the side surface of the extrusion plate 11, a movable plate 12 is mounted on the lower surface of the clamping plate 5 and is located in the second groove, a circular hole and a long groove are formed in the movable plate 12, one end of the supporting rod 10 is located in the long groove, the long groove is communicated with the circular hole, the mounting position of a steel structure is controlled by the extrusion plate 11 through the arrangement of the clamping plate 5 and the extrusion plate 11, the extrusion plate 11 moves downwards under the action of self gravity, at this moment, the supporting rod 10 moves downwards in the long groove, when the supporting rod 10 moves to the position matched with the circular hole, the movable plate 12 is driven by the reaction force of the first spring 9 to be close to the two ends of the steel structure on the supporting rod 10 by the clamping plate 5, and then the steel structure is fixed.

Protective telescopic sleeves 16 are sleeved outside the electric push rod 4, the electric push rod 4 is protected by the protective telescopic sleeves 16, two ends of the protective telescopic sleeves 16 are respectively fixedly connected with the movable plate 3 and the channel, limiting plates 15 are installed on the left side surface and the right side surface of the movable plate 3, the limiting plates 15 are used for limiting and supporting the movable plate 3, limiting grooves are formed in the left side surface and the right side surface of the inner wall of the channel, one ends of the limiting plates 15 are accommodated by the limiting grooves, one ends of the limiting plates 15 are slidably installed in the limiting grooves, the protective telescopic sleeves 16 are arranged, the electric push rod 4 is wrapped by the protective telescopic sleeves 16, the situation that debris splashes to the output shaft of the electric push rod 4 to influence the normal work of the electric push rod 4 is avoided, the movable plate 3 is limited and supported by the limiting plates 15 in the limiting grooves in a sliding mode, and the balance of the movable plate 3 is improved.

L-shaped plate 28 is all installed to the left and right sides of workstation 1 lower surface, utilize L-shaped plate 28 to support diaphragm 29, the effect that combines diaphragm 29 is fixed to material frame 27, the upper surface of L-shaped plate 28 lateral part is provided with diaphragm 29, install material frame 27 between two diaphragms 29, utilize material frame 27 to receive the piece, material frame 27 is located the below of passageway, through setting up material frame 27, utilize material frame 27 to be located the effect of passageway below, the piece that produces during welding is received, avoid the piece to fall the subaerial welding environment who influences the steel construction of avoiding, combine diaphragm 29 and L-shaped plate 28's effect, conveniently shift out material frame 27 at any time and carry out the cleaning work to the piece.

The telescopic rod 13 is arranged in the second spring 14, the second spring 14 is limited and supported by the telescopic rod 13, the stability of the second spring 14 is improved, the telescopic rod 13 is arranged on the inner bottom surface of the second groove, the telescopic shaft of the telescopic rod 13 is fixedly connected with the extrusion plate 11, the interception plate 30 is arranged on the lower surface of the workbench 1, the installation position of the material receiving frame 27 is limited by the interception plate 30, the rear side surface of the material receiving frame 27 is abutted against the interception plate 30, the telescopic rod 13 and the interception plate 30 are arranged, the second spring 14 is limited and supported by the telescopic rod 13, the stability of the second spring 14 is improved, the effect of the interception plate 30 is combined, the rear side of the material receiving frame 27 is blocked, the position, corresponding to a channel, of the material receiving frame 27 in the installation process is prevented from deviating, and the accuracy of the material receiving frame 27 in installation is improved.

The left side and the right side of the bracket 2 are both provided with a fixing plate 17, one end of a pull rope 18 is fixed by the fixing plate 17, the lower parts of the two fixing plates 17 are provided with a same U-shaped acrylic baffle plate 19, the steel structure is shielded by the acrylic baffle plate 19 during welding work, so that the safety of workers is ensured, the left side and the right side of the lower surface of the acrylic baffle plate 19 are both provided with a spring III 21, the acrylic baffle plate 19 is reset by the spring III 21, the other end of the spring III 21 is fixedly connected with the workbench 1, the upper surface of the workbench 1 is provided with two winding discs 31, the upper surface of the acrylic baffle plate 19 is provided with two pull ropes 18, one end of each pull rope 18 passes through a guide wheel arranged on the fixing plate 17, the guide wheels are used for guiding the pull ropes 18, so that the pull ropes 18 are prevented from deviating, one end of each pull rope 18 is wound on the winding discs 31, and the fixing assemblies are arranged on the winding discs 31, through the effect that sets up ya keli baffle 19 and stay cord 18, wrap up through 19 steel construction when welding of ya keli baffle, the firelight that produces when avoiding welding spatters the staff, combines stay cord 18 to support ya keli baffle 19, combines the effect of stay cord 18 winding on winding dish 31, carries out the work of going up and down to ya keli baffle 19, combines the effect of three 21 of spring, resets to ya keli baffle 19.

Fixed subassembly is including installing the commentaries on classics board 32 at winding dish 31 leading flank, utilize commentaries on classics board 32 drive winding dish 31 to rotate, it runs through to install bolt 6 to slide on the commentaries on classics board 32, utilize bolt 6 to fix winding dish 31, a plurality of slot has been seted up to the leading flank of winding dish 31, the one end of bolt 6 extends to in one of them slot, through setting up commentaries on classics board 32 and bolt 6, utilize commentaries on classics board 32 to fix the effect on winding dish 31, rotate winding dish 31 through changeing board 32, and then control the flexible tensity of stay cord 18, combine bolt 6 and slot matched with effect, fix winding dish 31, further fix the length of stay cord 18.

Conveyer pipe 22 is installed to the leading flank of support 2, utilize conveyer pipe 22 to carry gas, a plurality of breathing pipe is installed to the leading flank intercommunication of conveyer pipe 22, the gas that produces when utilizing the breathing pipe to weld absorbs, fan 23 is installed to the trailing flank of support 2, the air inlet of fan 23 passes support 2 and is linked together with conveyer pipe 22, the play tuber pipe of fan 23 is provided with processing assembly, utilize processing assembly to handle gas, through setting up fan 23 and conveyer pipe 22, the effect that utilizes fan 23's air-supply line and conveyer pipe 22 to be linked together, produce gas and flue gas and absorb when welding through the breathing pipe, and then avoid gas to be inhaled into the body by the staff and cause the damage to the health, protect staff's physical and mental health, combine processing assembly's effect, handle gas, further reach the effect of purifying.

The processing assembly comprises a processing box 24 arranged on the rear side surface of the bracket 2, the processing box 24 is used for fixing an activated carbon filter screen plate 26, an air outlet pipe of the fan 23 penetrates and extends into the processing box 24, the right side surface of the processing box 24 is communicated with an exhaust pipe 25, the exhaust pipe 25 is used for exhausting the processed air outwards, so that the processing box 24 can work normally, the activated carbon filter screen plate 26 positioned between the exhaust pipe 25 and the air outlet pipe of the fan 23 is arranged in the processing box 24, the activated carbon filter screen plate 26 is used for adsorbing and filtering peculiar smell and harmful gas in the air, the influence on the health of workers is avoided, the activated carbon filter screen plate 26 is arranged, the processing box 24 is used for supporting the activated carbon filter screen plate 26, the effect of the activated carbon filter screen plate 26 is combined, the exhausted air of the fan 23 is filtered, and the peculiar smell and the harmful substances mixed with the air are adsorbed, further purify the flue gas that produces during the welding, improve the air quality of the device during operation.

The last surface mounting of workstation 1 has two gag lever posts 20, utilize gag lever post 20 to slide the effect of running through ya keli baffle 19, carry out spacing support to ya keli baffle 19, the one end of gag lever post 20 slides and runs through the top that extends to ya keli baffle 19, and install the shutoff board, utilize the shutoff board to carry out the shutoff to the top of gag lever post 20, avoid ya keli baffle 19 roll-off gag lever post 20, spring three 21 is located the outside of gag lever post 20, through setting up gag lever post 20, utilize the effect that gag lever post 20 runs through ya keli baffle 19, restrict yakeli baffle 19's motion route, and then make yakeli baffle 19 reciprocate in the drive of spring three 21 and stay cord 18 is stable, further improve yakeli baffle 19's stability.

The invention also provides a using method of the steel structure welding device for realizing fixed limit according to gravity, which comprises the following steps of placing a steel structure on the upper surfaces of two extrusion plates 11, moving the extrusion plates 11 downwards by the gravity of the steel structure, extruding the second spring 14 and the telescopic rod 13 by the extrusion plates 11 at the moment, driving the support rod 10 to move downwards, moving one end of the support rod 10 downwards in a long groove, when the support rod 10 moves to a position matched with a circular hole, driving the clamping plate 5 to approach the steel structure by the reaction force of the first spring 9 through the clamping plate 5, penetrating the movable plate 12 through the support rod 10, sliding the sliding plate 7 on the sliding rod 8, completing the fixing of the steel structure, pulling one end of the bolt 6 out of the slot, then clockwise rotating the winding disc, moving the acrylic baffle 19 downwards by the reaction force of the third spring 21, and when the acrylic baffle 19 is abutted against the workbench 1, inserting one end of the bolt 6 into the slot again, then starting the fan 23, the welding main body and the electric push rod 4, welding the steel structure by the welding main body, enabling the electric push rod 4 to drive the moving plate 3 to move back and forth in the channel, driving the limiting plate 15 to slide in the limiting groove when the moving plate 3 moves, absorbing gas generated during welding by the air suction pipe, filtering by the activated carbon filter screen plate 26, discharging through the drain pipe, ensuring freshness of air in a working environment, dropping fragments generated during welding into the material receiving frame 27, collecting the fragments through the material receiving frame 27, moving the material receiving frame 27 to the front side when the fragments in the material receiving frame 27 need to be cleaned, driving the transverse plate 29 to slide on the L-shaped plate 28 when the material receiving frame 27 moves, then moving the material receiving frame 27 out to clean the fragments, and when the material receiving frame 27 needs to reset, according to the position of the L-shaped plate 28, the transverse plate 29 is moved into the L-shaped plate 28, and then the receiving frame 27 is moved continuously, when the receiving frame 27 is abutted against the intercepting plate 30, the position of the receiving frame 27 is accurately installed.

Claims

1. The utility model provides a realize fixed spacing steel construction welding set according to gravity, its characterized in that, includes workstation (1), installs support (2) at workstation (1) upper surface and installs the welding main part at support (2) lower surface, the passageway has been seted up to the upper surface of workstation (1), install electric putter (4) in the passageway, movable plate (3) are installed to the output shaft of electric putter (4), two sets of recess one have been seted up to the upper surface of movable plate (3), and the quantity of every group recess one is two, two recesses two have been seted up to the upper surface of movable plate (3), the recess two is located between two recesses one of the same group, install slide bar (8) in the recess one, slidable mounting has slide (7) on slide bar (8), the surface mounting of slide (7) has splint (5) of U-shaped, the improved structure of the automobile seat is characterized in that a first spring (9) is sleeved on the sliding rod (8), two ends of the first spring (9) are fixedly connected with the sliding plate (7) and the first groove respectively, a second spring (14) is installed on the inner bottom surface of the second groove, an L-shaped extrusion plate (11) is installed at the other end of the second spring (14), a supporting rod (10) is installed on the side surface of the extrusion plate (11), a movable plate (12) is installed on the lower surface of the clamping plate (5), the movable plate (12) is located in the second groove, a circular hole and an elongated slot are formed in the movable plate (12), one end of the supporting rod (10) is located in the elongated slot, and the elongated slot is communicated with the circular hole.

2. The steel structure welding device for realizing the fixed limit according to the gravity as claimed in claim 1, wherein a protective telescopic sleeve (16) is sleeved outside the electric push rod (4), two ends of the protective telescopic sleeve (16) are respectively fixedly connected with the movable plate (3) and the channel, the limiting plates (15) are respectively installed on the left side surface and the right side surface of the movable plate (3), the limiting grooves are respectively formed on the left side surface and the right side surface of the inner wall of the channel, and one end of each limiting plate (15) is slidably installed in each limiting groove.

3. The steel structure welding device achieving fixing and limiting according to gravity as claimed in claim 1, wherein L-shaped plates (28) are mounted on the left side and the right side of the lower surface of the workbench (1), transverse plates (29) are arranged on the upper surfaces of the transverse portions of the L-shaped plates (28), a material receiving frame (27) is mounted between the two transverse plates (29), and the material receiving frame (27) is located below the channel.

4. The steel structure welding device achieving the fixed limiting according to the gravity as claimed in claim 3, wherein a telescopic rod (13) is arranged in the second spring (14), the telescopic rod (13) is installed on the inner bottom surface of the second groove, a telescopic shaft of the telescopic rod (13) is fixedly connected with the extrusion plate (11), a blocking plate (30) is installed on the lower surface of the workbench (1), and the rear side surface of the material receiving frame (27) is abutted to the blocking plate (30).

5. The steel structure welding device for realizing the fixed limit according to the gravity as claimed in claim 1, it is characterized in that the left side surface and the right side surface of the bracket (2) are both provided with a fixing plate (17), the lower part of the two fixing plates (17) is provided with a U-shaped acrylic baffle plate (19), the left side and the right side of the lower surface of the acrylic baffle plate (19) are both provided with a third spring (21), the other end of the third spring (21) is fixedly connected with the workbench (1), the upper surface of the workbench (1) is provided with two winding discs (31), two pull ropes (18) are arranged on the upper surface of the acrylic baffle plate (19), one end of the pull rope (18) passes through a guide wheel arranged on the fixed plate (17), one end of the pull rope (18) is wound on the winding disc (31), and the winding disc (31) is provided with a fixing component.

6. The steel structure welding device achieving the fixing and limiting according to the gravity as recited in claim 5, wherein the fixing component comprises a rotating plate (32) installed on the front side face of the winding disc (31), a bolt (6) is installed on the rotating plate (32) in a sliding and penetrating mode, a plurality of slots are formed in the front side face of the winding disc (31), and one end of the bolt (6) extends into one of the slots.

7. The steel structure welding device achieving the fixed limiting according to the gravity as claimed in claim 1, wherein a conveying pipe (22) is installed on a front side surface of the support (2), a plurality of air suction pipes are installed on the front side surface of the conveying pipe (22) in a communicating mode, a fan (23) is installed on a rear side surface of the support (2), an air inlet of the fan (23) penetrates through the support (2) to be communicated with the conveying pipe (22), and an air outlet pipe of the fan (23) is provided with a processing assembly.

8. The steel structure welding device achieving the fixing and limiting according to the gravity as claimed in claim 7, wherein the processing assembly comprises a processing box (24) installed on the rear side face of the support (2), an air outlet pipe of the fan (23) penetrates through and extends into the processing box (24), the right side face of the processing box (24) is communicated with an exhaust pipe (25), and an activated carbon filter screen plate (26) located between the exhaust pipe (25) and the air outlet pipe of the fan (23) is installed in the processing box (24).

9. The steel structure welding device for realizing the fixed limit according to the gravity as claimed in claim 5, wherein two limit rods (20) are installed on the upper surface of the workbench (1), one end of each limit rod (20) penetrates through the upper portion of the acrylic baffle (19) in a sliding mode and is provided with a plugging plate, and the spring III (21) is located on the outer side of each limit rod (20).

10. The use method of the steel structure welding device for realizing the fixed limit according to the gravity as claimed in any one of claims 1 to 9 is characterized by comprising the following steps:

the steel structure is placed on the upper surfaces of two extrusion plates (11), the extrusion plates (11) are moved downwards by the gravity of the steel structure, at the moment, the second spring (14) and the telescopic rod (13) are extruded by the extrusion plates (11), the support rod (10) is driven to move downwards, one end of the support rod (10) moves downwards in the long groove, when the support rod (10) moves to a position matched with the circular hole, the clamping plate (5) is driven by the reaction force of the first spring (9) to move towards the steel structure, the movable plate (12) penetrates through the support rod (10), the sliding plate (7) slides on the sliding rod (8), the steel structure is fixed completely, then the slot is pulled out of one end of the bolt (6), the wire winding disc is rotated clockwise, the acrylic baffle plate (19) moves downwards by the reaction force of the third spring (21), and when the acrylic baffle plate (19) is abutted against the workbench (1), inserting one end of a bolt (6) into the slot again, then starting a fan (23), a welding main body and an electric push rod (4), wherein the welding main body performs welding work on a steel structure, the electric push rod (4) drives the movable plate (3) to move back and forth in the channel, the movable plate (3) drives the limiting plate (15) to slide in the limiting groove when moving, the air suction pipe absorbs gas generated during welding, the gas is filtered by the active carbon filter screen plate (26) and then discharged through the drain pipe, the freshness of air in a working environment is ensured, scraps generated during welding fall into the material receiving frame (27), the scraps are collected through the material receiving frame (27), when the scraps in the material receiving frame (27) need to be cleaned, the material receiving frame (27) moves towards the front side, the transverse plate (29) is driven to slide on the L-shaped plate (28) when the material receiving frame (27) moves, and then the material receiving frame (27) can be moved out to clean the scraps, when the material receiving frame (27) needs to be reset, the transverse plate (29) is moved into the L-shaped plate (28) according to the position of the L-shaped plate (28), then the material receiving frame (27) is moved continuously, and when the material receiving frame (27) is abutted to the intercepting plate (30), the position of the material receiving frame (27) is installed accurately.