Fire-fighting smoke prevention and exhaust pipeline welding equipment

Abstract

The invention relates to the technical field of firefighting pipeline welding equipment, and provides firefighting smoke prevention and exhaust pipeline welding equipment which comprises an operation table and a back plate located at the top of the operation table, a pair of supporting legs are fixedly connected to the bottom of the operation table, a cross beam is fixedly connected between the supporting legs, and a pair of rectangular through holes are formed in the top of the operation table; a plurality of conveying rollers are arranged in the pair of rectangular through holes, the two ends of the conveying rollers are rotationally connected with the two sides of the inner walls of the rectangular through holes, a plurality of limiting strips are arranged around the conveying rollers and fixedly connected with the top of the operation table, and a pair of openings is formed in the top of the operation table; the pair of openings is located in the two sides of one rectangular through hole, and a bending mechanism is arranged on the operation table. Through cooperation of the bending mechanism, the inner supporting assembly and the welding assembly, bending of the metal plate to forming of the smoke exhaust pipeline can be rapidly completed, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fire protection pipeline welding equipment, in particular to fire protection smoke exhaust pipeline welding equipment. Background Art

[0002] Fire smoke exhaust duct is a safety facility. Its main function is to discharge thick smoke, harmful gases and other toxic substances from indoors to outside of the building after a fire occurs, so as to ensure indoor air quality and personnel safety. Smoke exhaust duct can be divided into circular smoke exhaust duct, rectangular smoke exhaust duct and oblate smoke exhaust duct according to the cross-sectional shape. Among them, the circular smoke exhaust duct has the smallest resistance but the largest height dimension and is complex to manufacture, so the rectangular smoke exhaust duct is mainly used.

[0003] At present, the production process of rectangular air ducts is to bend the cut metal plates first, and then align the gaps of the metal plates to be welded by workers, and then manually weld them to complete the forming and production of the smoke exhaust duct. In the above process, the bending of the metal plates to form the smoke exhaust duct needs to be divided into multiple steps, which is time-consuming and labor-intensive, and has low production efficiency. In addition, during manual welding, it is impossible to ensure the stability of the movement of the welding gun and control the distance between the welding gun and the seam, which can easily lead to distortion of the weld and welding through the metal plate, affecting the production quality of the product. Summary of the invention

[0004] The present invention provides a fire-fighting smoke exhaust pipe welding device, which solves the problem that the bending of metal plates into smoke exhaust pipes needs to be divided into multiple steps and is time-consuming and labor-intensive through the cooperation of a bending mechanism, an internal support component and a welding component in the background technology.

[0005] The technical solution of the present invention is as follows: A fire-fighting smoke exhaust pipe welding device comprises an operating table and a back plate located on the top of the operating table, a pair of legs are fixedly connected to the bottom of the operating table, a crossbeam is fixedly connected between the pair of legs, a pair of rectangular through holes are opened on the top of the operating table, a plurality of transport rollers are arranged in each of the pair of rectangular through holes, two ends of the transport rollers are rotatably connected to the inner walls of the rectangular through holes, a plurality of limit strips are arranged around the transport rollers, and the plurality of limit strips are fixedly connected to the top of the operating table, a pair of openings are opened on the top of the operating table, a pair of the openings are located on both sides of one of the rectangular through holes, and a bending mechanism is arranged on the operating table; The bending mechanism includes two pairs of sliding frames, the tops of the two pairs of sliding frames are fixedly connected to the bottom of the operating table, sliding rods are arranged in the two pairs of sliding frames, the two ends of the sliding rods are respectively fixedly connected to the top and bottom of the inner wall of the sliding frame, a slider is sleeved on the sliding rod, the slider is slidably connected to the sliding rod, a pair of bending plates are arranged between the two pairs of sliding frames, the two pairs of sliding frames are respectively fixedly connected to one of the bending plates through the slider, a pair of the bending plates vertically penetrates one of the openings respectively, a cross bar is fixedly connected between the pair of bending plates, a cylinder is arranged under the cross bar, the output end of the cylinder is fixedly connected to the bottom end surface of the cross bar, and the bottom of the cylinder is fixedly connected to the top of the cross beam.

[0006] Furthermore, the bending mechanism also includes a through slot opened on the top of the operating table, a moving block is arranged in the through slot, the moving block is slidably connected to the through slot, a positioning rod and a screw rod are respectively inserted through the side walls of the moving block, the moving block is slidably connected to the positioning rod, the moving block is threadedly connected to the screw rod, and both ends of the positioning rod are fixedly connected to the two sides of the inner wall of the through slot.

[0007] Furthermore, a pair of mounting plates are fixedly connected to the bottom of the operating table, one end of the screw rod is rotatably connected to one of the mounting plates, the other end of the screw rod horizontally penetrates the other mounting plate and is rotatably connected to the mounting plate, one end of the screw rod horizontally penetrates the mounting plate and is fixedly connected to a first motor via a coupling, the first motor is fixedly connected to the bottom of the operating table, and an L-shaped bent straight plate is fixedly connected to the top of the moving block.

[0008] Furthermore, an inner support assembly is provided on one side of the back panel, and the inner support assembly includes four positioning pins, and the four positioning pins are fixedly connected to one side of the back panel, and four sliding grooves are opened through the side wall of the back panel, and connecting rods are inserted in the four sliding grooves, and the connecting rods are slidably connected to the sliding grooves, and rings are sleeved on the four positioning pins, and the rings are slidably connected to the positioning pins, and the rings are fixedly connected to one end of the connecting rod.

[0009] Furthermore, four bending rods are arranged on one side of the back plate, a hinge seat is arranged on one side of each of the four bending rods, a flat plate is arranged on one side of each of the bending rods facing the adjacent bending rod, and two relatively arranged flat plates are slidably connected via a telescopic groove.

[0010] Furthermore, the back panel side wall is fixedly connected to a second drive motor, the output end of the second drive motor is fixedly connected to a cross-rotating bracket, the cross-rotating bracket is rotatably connected to four support arms through an axle pin, and the other ends of the four support arms are rotatably connected to the bending rod body through a hinge seat.

[0011] Furthermore, a welding assembly is arranged above the inner support assembly, and the welding assembly includes a translation block, a pair of track rods are horizontally inserted through the translation block, the track rods are slidably connected to the translation block, one end of the track rod is fixedly connected to the back plate, and the other end of the track rod is fixedly connected to an iron block, and a rack is arranged above the translation block, and both ends of the rack are fixedly connected to the side wall of the back plate and the side wall of the iron block.

[0012] Furthermore, a pair of support frames are fixedly connected to the bottom of the translation block, a rectangular sleeve is fixedly connected between the pair of support frames, a welding gun is inserted through the rectangular sleeve, the welding gun is slidably connected to the rectangular sleeve, a limiting block is fixedly connected to the welding gun, a limiting groove matching the size of the limiting block is opened on the top of the rectangular sleeve, the limiting block is slidably connected to the limiting groove, an electric telescopic rod is fixedly connected to the top of the rectangular sleeve, and the output end of the electric telescopic rod is fixedly connected to the side wall of the limiting block.

[0013] Furthermore, a mounting platform is fixedly connected between a pair of support frames, a third drive motor is fixedly connected to the top of the mounting platform, an output end of the third drive motor passes through the translation block and extends out of the top of the translation block, the output end of the third drive motor is rotationally connected to the translation block, and a gear is fixedly connected to the output end of the third drive motor, and the gear is meshed with the rack.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can quickly bend the metal plate through the cooperation of the bending mechanism, the inner support component and the welding component, and clamp and fix the formed smoke exhaust pipe through the flat plate, the L-shaped bending straight plate and the bending plate, so as to avoid the deformation of the metal plate causing the welding seam gap to be too large and affect the welding effect. After welding is completed, the smoke exhaust pipe can be released by resetting the bending mechanism and the inner support component, and the completed smoke exhaust pipe can be quickly removed from the operating table. The device can quickly bend the metal plate to form the smoke exhaust pipe through the cooperation of the bending mechanism, the inner support component and the welding component, thereby improving production efficiency.

[0015] 2. The present invention drives the welding gun to translate on the track rod through the translation block, thereby improving the stability of the welding gun movement and effectively controlling the residence time of the welding gun on the surface of the weld seam, thereby avoiding welding through the metal plate. The welding gun is driven by the electric telescopic rod to slide and adjust the welding gun in the rectangular sleeve, thereby adjusting the adaptation distance between the welding gun and the weld seam, thereby avoiding the front end of the welding gun from contacting the weld seam or being away from the weld seam, which causes an unsatisfactory welding effect and affects the production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall three-dimensional schematic diagram of the device of the present invention; Figure 2It is a three-dimensional schematic diagram of the operating table of the present invention; Figure 3 It is a three-dimensional schematic diagram of the bending mechanism of the present invention; Figure 4 It is a three-dimensional schematic diagram of the inner support assembly of the present invention; Figure 5 It is a three-dimensional schematic diagram of the welding assembly of the present invention; Figure 6 The present invention Figure 5 A point enlarged schematic diagram; Figure 7 It is a schematic plan view of the metal plate bending and welding of the present invention.

[0017] In the figure: 1. Operation table; 101. Leg; 102. Crossbeam; 2. Back plate; 3. Rectangular through hole; 4. Transport roller; 5. Limiting strip; 6. Opening; 7. Bending mechanism; 71. Sliding frame; 72. Sliding rod; 73. Sliding block; 74. Bending plate; 75. Crossbar; 76. Cylinder; 77. Through groove; 78. Moving block; 79. Positioning rod; 710. Screw rod; 711. Mounting plate; 712. First motor; 713. L-shaped bending straight plate; 8. Inner support assembly; 81. Positioning pin; 82. Sliding groove; 83. Connecting rod; 84 , ring; 85, bending rod body; 86, hinge seat; 87, flat plate; 88, telescopic slot; 89, second drive motor; 810, cross rotating bracket; 811, support arm; 9, welding assembly; 91, translation block; 92, track rod; 93, iron block; 94, rack; 95, support frame; 96, rectangular sleeve; 97, welding gun; 98, limit block; 99, limit slot; 910, electric telescopic rod; 911, mounting platform; 912, third drive motor; 913, gear; 10, metal plate; 11, welding seam. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] The present invention provides a fire-fighting smoke exhaust pipe welding device, comprising an operating table 1 and a back plate 2 located at the top of the operating table 1, a pair of legs 101 are fixedly connected to the bottom of the operating table 1, a crossbeam 102 is fixedly connected between the pair of legs 101, a pair of rectangular through holes 3 are opened at the top of the operating table 1, a plurality of transport rollers 4 are arranged in each of the pair of rectangular through holes 3, two ends of the transport rollers 4 are rotatably connected to the inner walls of the rectangular through holes 3, a plurality of limit strips 5 are arranged around the transport rollers 4, and the plurality of limit strips 5 are fixedly connected to the top of the operating table 1, a pair of openings 6 are opened at the top of the operating table 1, a pair of the openings 6 are located on both sides of one of the rectangular through holes 3, and a bending mechanism 7 is arranged on the operating table 1; The bending mechanism 7 includes two pairs of sliding frames 71, the tops of the two pairs of sliding frames 71 are fixedly connected to the bottom of the operating table 1, and sliding rods 72 are arranged in the two pairs of sliding frames 71. The two ends of the sliding rods 72 are respectively fixedly connected to the top and bottom of the inner wall of the sliding frames 71, and a slider 73 is sleeved on the sliding rod 72. The slider 73 is slidably connected to the sliding rod 72, and a pair of bending plates 74 is arranged between the two pairs of sliding frames 71. The two pairs of sliding frames 71 are respectively fixedly connected to one of the bending plates 74 through the slider 73, and a pair of the bending plates 74 vertically penetrates one of the openings 6 respectively, and a cross bar 75 is fixedly connected between the pair of bending plates 74. A cylinder 76 is arranged below the cross bar 75, and the output end of the cylinder 76 is fixedly connected to the bottom end surface of the cross bar 75, and the bottom of the cylinder 76 is fixedly connected to the top of the beam 102.

[0020] Among them, the bending mechanism 7 also includes a through slot 77 opened on the top of the operating table 1, and a moving block 78 is arranged in the through slot 77, and the moving block 78 is slidably connected to the through slot 77, and a positioning rod 79 and a screw rod 710 are respectively inserted through the side walls of the moving block 78, and the moving block 78 is slidably connected to the positioning rod 79, and the moving block 78 is threadedly connected to the screw rod 710, and the two ends of the positioning rod 79 are fixedly connected to the two sides of the inner wall of the through slot 77.

[0021] Among them, a pair of mounting plates 711 are fixedly connected to the bottom of the operating table 1, one end of the screw rod 710 is rotatably connected to one of the mounting plates 711, the other end of the screw rod 710 horizontally penetrates the other mounting plate 711, and is rotatably connected to the mounting plate 711, one end of the screw rod 710 horizontally penetrates the mounting plate 711 and is fixedly connected to the first motor 712 through a coupling, the first motor 712 is fixedly connected to the bottom of the operating table 1, and the top of the moving block 78 is fixedly connected to an L-shaped bent straight plate 713.

[0022] It should be noted that the front ends of the bending plate 74 and the L-shaped bending straight plate 713 are both provided with a 45-degree cutting angle, so that when the bending plate 74 and the L-shaped bending straight plate 713 cooperate with the bending rod body 85 to bend the metal plate 10, the metal plate 10 can smoothly enter the gap formed by the bending plate 74 and the L-shaped bending straight plate 713 and the bending rod body 85.

[0023] Among them, an inner support component 8 is provided on one side of the back plate 2, and the inner support component 8 includes four positioning pins 81, and the four positioning pins 81 are fixedly connected to one side of the back plate 2. Four sliding grooves 82 are penetrated through the side wall of the back plate 2, and connecting rods 83 are inserted in the four sliding grooves 82. The connecting rods 83 are slidably connected to the sliding grooves 82. Rings 84 are sleeved on the four positioning pins 81, and the rings 84 are slidably connected to the positioning pins 81, and the rings 84 are fixedly connected to one end of the connecting rod 83.

[0024] Among them, four bending rods 85 are arranged on one side of the back plate 2, and a hinge seat 86 is arranged on one side of the four bending rods 85. A flat plate 87 is arranged on the side of the bending rod 85 facing the adjacent bending rod 85, and the two relatively arranged flat plates 87 are slidably connected by a telescopic groove 88. The telescopic groove 88 is opened at one end of the flat plate 87 away from the bending rod 85, and the thickness is half of the thickness of the flat plate 87.

[0025] Among them, the side wall of the back panel 2 is fixedly connected to a second drive motor 89, and the output end of the second drive motor 89 is fixedly connected to a cross-rotating bracket 810. The cross-rotating bracket 810 is rotatably connected to four support arms 811 through an axle pin, and the other ends of the four support arms 811 are rotatably connected to the bending rod body 85 through a hinge seat 86.

[0026] It should be noted that a right-angle groove is provided on the bent rod body 85 near the welding gun 97 to prevent the bent rod body 85 from being welded together when welding the joint of the smoke exhaust pipe.

[0027] Among them, a welding assembly 9 is arranged above the inner support assembly 8, and the welding assembly 9 includes a translation block 91. A pair of track rods 92 are horizontally inserted through the translation block 91. The track rods 92 are slidably connected to the translation block 91, one end of the track rod 92 is fixedly connected to the back plate 2, and the other end of the track rod 92 is fixedly connected to an iron block 93. A rack 94 is arranged above the translation block 91, and both ends of the rack 94 are fixedly connected to the side walls of the back plate 2 and the side walls of the iron block 93.

[0028] Among them, a pair of support frames 95 are fixedly connected to the bottom of the translation block 91, and a rectangular sleeve 96 is fixedly connected between the pair of support frames 95. A welding gun 97 is inserted through the rectangular sleeve 96, and the welding gun 97 is slidably connected to the rectangular sleeve 96. A limiting block 98 is fixedly connected to the welding gun 97, and a limiting groove 99 matching the size of the limiting block 98 is opened on the top of the rectangular sleeve 96. The limiting block 98 is slidably connected to the limiting groove 99, and an electric telescopic rod 910 is fixedly connected to the top of the rectangular sleeve 96, and the output end of the electric telescopic rod 910 is fixedly connected to the side wall of the limiting block 98.

[0029] Among them, a mounting platform 911 is fixedly connected between a pair of the support frames 95, and a third driving motor 912 is fixedly connected to the top of the mounting platform 911. The output end of the third driving motor 912 passes through the translation block 91 and extends out of the top of the translation block 91. The output end of the third driving motor 912 is rotatably connected to the translation block 91, and the output end of the third driving motor 912 is fixedly connected to a gear 913, and the gear 913 is meshed with the rack 94.

[0030] Example: Figure 1-6As shown, in this embodiment, the metal plate 10 cut to size is pushed toward the back plate 2 along the limit strips 5 on both sides, and the metal plate 10 is moved by the transport roller 4 until the three sides of the metal plate 10 touch all the limit strips 5 on the top of the operating table 1, and the second drive motor 89 fixedly connected to the side wall of the back plate 2 is started to rotate the cross rotating bracket 810, so that the support arm 811 pushes the four bending rod bodies 85 to move in different directions respectively, and the connecting rod 83 fixedly connected to the four bending rod bodies 85 moves in the slide groove 82, and one end of the connecting rod 83 slides on the positioning pin 81 through the ring 84. When the connecting rod 83 moves to the end of the slide groove 82, the side wall of the connecting rod 83 touches the inner wall of the slide groove 82, and the movement of the four bending rod bodies 85 stops. The flat plate 87 fixedly connected to the side wall of the bending rod body 85 extends the length of the flat plate 87 through the telescopic groove 88. At this time, the two bending rod bodies 85 located below, together with the flat plate 87, fit with the top of the metal plate 10, and cooperate with the transport roller 4 to clamp the metal plate 10.

[0031] It should be noted that the two openings 6 are located on both sides of one of the rectangular through holes 3, and the opening 6 located between the two rectangular through holes 3 is located in the middle position of the metal plate 10. When bent by two bending plates 74, the metal plate 10 is located at one end above the other rectangular through hole 3, and its length is the sum of the length of the folded part of the other end of the metal plate 10 and the length of the undone part of the metal plate 10.

[0032] like Figure 1-3 and Figure 7 As shown, the cylinder 76 is started to push the cross bar 75 to move upward, thereby driving a pair of bending plates 74 fixedly connected to the cross bar 75 to move upward, and the bending plate 74 moves upward along the sliding bar 72 through the slider 73, and the front end of the bending plate 74 passes through the opening 6, so that the front end of the bending plate 74 and the 45-degree cut angle touch the metal plate 10, and the bending plate 74 continues to move upward, so that the metal plate 10 is folded along the right-angled edge of the bending rod body 85, thereby forming a 90-degree angle of the metal plate 10, and the bending plate 74 and the flat plate 87 are respectively attached to the two sides of the metal plate 10 to avoid deformation of the metal plate 10 during the bending process. After the top of the slider 73 touches the top of the inner wall of the sliding frame 71, the bending plate 74 stops moving upward.

[0033] like Figure 1 , 3As shown in 7, the first motor 712 is then started to rotate the screw rod 710 in the through slot 77, so that the moving block 78 on the screw rod 710 moves along the positioning rod 79 toward the inner support assembly 8, thereby driving the L-shaped bent straight plate 713 fixedly connected to the top of the moving block 78 to move, and the front end and the 45-degree cut angle of the L-shaped bent straight plate 713 contact the metal plate 10, so that the metal plate 10 is folded along the right-angled edge of the bending rod body 85, thereby completing the bending, and the L-shaped bent straight plate 713 and the flat plate 87 are respectively attached to the two sides of the metal plate 10, and the bending of the metal plate 10 is completed through the cooperation of the bending mechanism 7 and the inner support assembly 8.

[0034] like Figure 1 , 5 As shown in Figures 6 and 7, the third drive motor 912 is started to rotate the gear 913, and the gear 913 cooperates with the rack 94 to drive the translation block 91 to translate on a pair of track rods 92. After moving to the welding seam 11, the electric telescopic rod 910 is started to push the limit block 98 to slide in the limit groove 99, thereby driving the welding gun 97 to slide in the rectangular sleeve 96, and then adjusting the adaptive welding distance between the welding gun 97 and the welding seam 11, and the gap of the welding seam 11 is welded by translating the welding gun 97. After welding is completed, the smoke exhaust pipe is released by contracting the bending rod body 85 and resetting the L-shaped bending straight plate 713 and the bending plate 74, so that the completed smoke exhaust pipe can be quickly removed from the operating table 1.

[0035] It should be noted that: Figure 7 As shown, the metal plate 10 is used to perform two right-angle bends on the smoke exhaust duct through the cooperation of the two bending rods 85 at the bottom and the two bending plates 74, and then the third right-angle bend on the smoke exhaust duct is performed through the cooperation of the L-shaped bending straight plate 713 and the bending rod 85 at the upper right, and the two ends of the metal plate 10 meet at the right-angle groove position of the bending rod 85 at the upper left to form a welding seam 11.

[0036] Start the third drive motor 912 to rotate the gear 913, and the gear 913 cooperates with the rack 94 to drive the translation block 91 to translate on a pair of track rods 92. After moving to the welding seam 11, start the electric telescopic rod 910 to push the limit block 98 to slide in the limit groove 99, thereby driving the welding gun 97 to slide in the rectangular sleeve 96, and then adjust the adaptive welding distance between the welding gun 97 and the welding seam 11, and weld the gap of the welding seam 11 by translating the welding gun 97.

[0037] After welding is completed, the smoke exhaust pipe can be quickly removed from the operating table 1 by contracting the bent rod 85 and resetting the L-shaped bent straight plate 713 and the bent plate 74 to release the clamping of the smoke exhaust pipe.

[0038] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fire-fighting smoke exhaust pipe welding device, comprising an operating table (1) and a back plate (2) located on the top of the operating table (1), a pair of legs (101) being fixedly connected to the bottom of the operating table (1), a crossbeam (102) being fixedly connected between the pair of legs (101), characterized in that: A pair of rectangular through holes (3) are provided on the top of the operating table (1), and a plurality of transport rollers (4) are provided in each of the pair of rectangular through holes (3). Two ends of the transport rollers (4) are rotatably connected to the inner walls of the rectangular through holes (3). A plurality of limit strips (5) are provided around the transport rollers (4), and the plurality of limit strips (5) are fixedly connected to the top of the operating table (1). A pair of openings (6) are provided on the top of the operating table (1), and the pair of openings (6) are located on both sides of one of the rectangular through holes (3). A bending mechanism (7) is provided on the operating table (1); The bending mechanism (7) comprises two pairs of sliding frames (71), the tops of the two pairs of sliding frames (71) are fixedly connected to the bottom of the operating table (1), the two pairs of sliding frames (71) are provided with sliding rods (72), the two ends of the sliding rods (72) are respectively fixedly connected to the top and bottom of the inner wall of the sliding frame (71), a sliding block (73) is sleeved on the sliding rod (72), the sliding block (73) is slidably connected to the sliding rod (72), and a pair of bending plates are provided between the two pairs of sliding frames (71). (74), the two pairs of sliding frames (71) are respectively fixedly connected to one of the bending plates (74) through a slider (73), a pair of the bending plates (74) vertically penetrates one of the openings (6), a cross bar (75) is fixedly connected between the pair of bending plates (74), a cylinder (76) is arranged below the cross bar (75), an output end of the cylinder (76) is fixedly connected to the bottom end surface of the cross bar (75), and the bottom of the cylinder (76) is fixedly connected to the top of the cross beam (102).

2. A fire-fighting smoke exhaust pipe welding device as claimed in claim 1, characterized in that: The bending mechanism (7) further comprises a through slot (77) formed on the top of the operating table (1), a moving block (78) being arranged in the through slot (77), the moving block (78) being slidably connected to the through slot (77), a positioning rod (79) and a screw rod (710) being respectively inserted through the side walls of the moving block (78), the moving block (78) being slidably connected to the positioning rod (79), the moving block (78) being threadedly connected to the screw rod (710), and two ends of the positioning rod (79) being fixedly connected to two sides of the inner wall of the through slot (77).

3. A fire-fighting smoke exhaust pipe welding device as claimed in claim 2, characterized in that: A pair of mounting plates (711) are fixedly connected to the bottom of the operating table (1); one end of the screw rod (710) is rotatably connected to one of the mounting plates (711); the other end of the screw rod (710) horizontally penetrates the other mounting plate (711) and is rotatably connected to the mounting plate (711); one end of the screw rod (710) horizontally penetrates the mounting plate (711) and is fixedly connected to a first motor (712) via a coupling; the first motor (712) is fixedly connected to the bottom of the operating table (1); and an L-shaped bent straight plate (713) is fixedly connected to the top of the moving block (78).

4. A fire-fighting smoke exhaust pipe welding device as claimed in claim 1, characterized in that: An inner support assembly (8) is provided on one side of the back plate (2), and the inner support assembly (8) includes four positioning pins (81), and the four positioning pins (81) are fixedly connected to one side of the back plate (2); four sliding grooves (82) are penetrated through the side wall of the back plate (2), and connecting rods (83) are inserted into the four sliding grooves (82), and the connecting rods (83) are slidably connected to the sliding grooves (82); rings (84) are sleeved on the four positioning pins (81), and the rings (84) are slidably connected to the positioning pins (81), and the rings (84) are fixedly connected to one end of the connecting rod (83).

5. A fire-fighting smoke exhaust pipe welding device as claimed in claim 4, characterized in that: Four bending rods (85) are arranged on one side of the back plate (2), and hinge seats (86) are arranged on one side of each of the four bending rods (85). A flat plate (87) is arranged on one side of each of the bending rods (85) facing an adjacent bending rod (85), and two flat plates (87) arranged opposite to each other are slidably connected via telescopic grooves (88).

6. A fire-fighting smoke exhaust pipe welding device as claimed in claim 5, characterized in that: A second drive motor (89) is fixedly connected to the side wall of the back plate (2); an output end of the second drive motor (89) is fixedly connected to a cross-rotating bracket (810); the cross-rotating bracket (810) is rotatably connected to four support arms (811) via an axle pin; the other ends of the four support arms (811) are rotatably connected to the bending rod body (85) via a hinge seat (86).

7. A fire-fighting smoke exhaust pipe welding device as claimed in claim 6, characterized in that: A welding assembly (9) is arranged above the inner support assembly (8), the welding assembly (9) comprising a translation block (91), a pair of track rods (92) being inserted horizontally through the translation block (91), the track rods (92) being slidably connected to the translation block (91), one end of the track rod (92) being fixedly connected to the back plate (2), the other end of the track rod (92) being fixedly connected to an iron block (93), and a rack (94) being arranged above the translation block (91). The two ends of the rack (94) are fixedly connected to the side wall of the back plate (2) and the side wall of the iron block (93).

8. A fire-fighting smoke exhaust pipe welding device as claimed in claim 7, characterized in that: A pair of support frames (95) are fixedly connected to the bottom of the translation block (91), a rectangular sleeve (96) is fixedly connected between the pair of support frames (95), a welding gun (97) is inserted through the rectangular sleeve (96), the welding gun (97) is slidably connected to the rectangular sleeve (96), a limit block (98) is fixedly connected to the welding gun (97), a limit groove (99) whose size matches that of the limit block (98) is formed on the top of the rectangular sleeve (96), the limit block (98) is slidably connected to the limit groove (99), an electric telescopic rod (910) is fixedly connected to the top of the rectangular sleeve (96), and an output end of the electric telescopic rod (910) is fixedly connected to a side wall of the limit block (98).

9. A fire-fighting smoke exhaust pipe welding device as claimed in claim 8, characterized in that: A mounting platform (911) is fixedly connected between the pair of support frames (95); a third drive motor (912) is fixedly connected to the top of the mounting platform (911); an output end of the third drive motor (912) passes through the translation block (91) and extends out of the top of the translation block (91); the output end of the third drive motor (912) is rotationally connected to the translation block (91); a gear (913) is fixedly connected to the output end of the third drive motor (912); and the gear (913) is meshed with the rack (94).

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