Welding device for assembly type fire station

Abstract

The invention discloses a welding device for an assembly type fire station, relates to the field of welding processing, and solves the problem that an existing welding device is difficult to position and weld according to the size of a pipeline, the welding device comprises a device base and a lifting support mounted at the top of the device base, and a mounting shell is arranged at the top of the device base; a pipe body is arranged on the inner side of the mounting shell, and a welding gun is arranged on the side, close to the lifting support, of the mounting shell. The pipe fixing mechanism is used for positioning pipe bodies of more sizes, the pipe fixing mechanism is mounted on the inner side of the mounting shell, the pipe fixing mechanism comprises two annular frames which are symmetrically and rotationally mounted at the two ends of the mounting shell, and four pressing wheels which are distributed in a central symmetry mode are arranged on the inner sides of the two annular frames; through the pipe fixing mechanism, the pressing wheels at the two ends of the mounting shell can make contact with the outer side of the pipe body in a synchronous shrinkage state, self-adaptive clamping of the pipe body is achieved, and therefore pipe bodies of more sizes can be rapidly machined conveniently.

Description

Technical Field

[0001] The present invention relates to the field of welding processing, in particular to a welding device for an assembled fire station. Background Art

[0002] An assembled fire station is a fire-fighting facility that is rapidly constructed using modular assembled construction technology. It is efficiently deployed through factory prefabrication and on-site assembly. The main structure is prefabricated in the factory and then transported to the site where it is assembled like "building blocks", significantly shortening the construction period.

[0003] When processing the prefabricated fire station, it is necessary to use welding equipment to weld the connections of the modular steel structure to ensure the overall strength and stability of the fire station. Among them, the pipe-like structure is the core component to ensure the efficient operation of the fire-fighting function. Its role covers many key areas such as fire extinguishing system, ventilation and smoke exhaust, equipment protection, etc. Pipes are usually installed on steel plates by welding. The existing welding device uses a double plywood method to fix the pipe. Although it can achieve rapid positioning of the pipe, the size of the plywood needs to be consistent with the diameter of the pipe, otherwise the clamping surface will be small. However, in order to ensure ventilation and smoke exhaust, the prefabricated fire station will weld a variety of pipes of different diameters. It is necessary to replace plywood of different sizes every time the steel pipe is welded, and the welding efficiency is low. Summary of the Invention

[0004] The object of the present invention is to provide a welding device for a prefabricated fire station to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A welding device for an assembled fire station, comprising: a device base and a lifting bracket fixedly mounted on the top of the device base; a mounting shell is provided on the top of the device base, a pipe body is provided on the inner side of the mounting shell, and a welding gun is provided on the side of the mounting shell close to the lifting bracket; Also includes: A pipe fixing mechanism is used to position the pipe bodies of various sizes. The pipe fixing mechanism is installed on the inner side of the mounting shell and includes two annular frames symmetrically mounted on both ends of the mounting shell. Four pressing wheels symmetrically distributed along the center are provided on the inner sides of the two annular frames. The pressing wheels can press against the outer side of the pipe body. a positioning mechanism for automatically adjusting the position of the welding gun, the positioning mechanism being mounted on the outside of the welding gun and comprising a movable rod disposed on the outside of the welding gun, the movable rod being capable of pulling the welding gun closer to the welding port of the pipe body; The transfer welding mechanism is used for fully welding the pipe body and the plate. The transfer welding mechanism is installed on the outside of the welding gun. The transfer welding mechanism includes a turntable arranged on the outside of the mounting shell. The turntable can make the welding gun perform circular motion and positioning welding.

[0006] Preferably, the fixed pipe mechanism also includes four sleeve frames symmetrically arranged on the inner side of the annular frame, two symmetrically distributed positioning rods are fixedly installed on the outer side of the sleeve frame, the positioning rods are rotatably installed on the inner side of the annular frame, a rocker arm is slidably installed on the inner side of the sleeve frame, the four pressure wheels are respectively fixedly installed on one end of the four rocker arms, the end of the rocker arm away from the pressure wheel is fixedly installed with a mounting rod, the mounting rod is rotatably installed at the end of the mounting shell, a cylindrical bracket is fixedly installed between the two annular frames, a worm is rotatably installed on the inner side of the mounting shell, an arc-shaped rack matching the worm is fixedly installed on the outer side of the cylindrical bracket, a first motor is fixedly installed on the outer side of the mounting shell, and the output end of the first motor is fixedly connected to one end of the worm.

[0007] Preferably, the positioning mechanism also includes a positioning block fixedly mounted on the mounting shell near one end of the lifting bracket, a long groove is provided on the outer side of the moving rod, and the moving rod is slidably mounted on the outer side of the positioning block through the long groove, a U-shaped card frame is fixedly mounted on the outer side of the moving rod, a pull block is provided on the inner side of the U-shaped card frame, and the pull block is fixedly mounted on the outer side of the welding gun, a pulley is rotatably mounted on the bottom end of the moving rod, a pull rod is provided on the outer side of the pulley, a pull groove is provided on the outer side of the pulley for limiting the sliding of the pulley, and the end of the pull rod away from the pulley is fixedly mounted on the outer side of the adjacent positioning rod.

[0008] Preferably, the transfer welding mechanism further comprises an arc frame fixedly mounted on the mounting shell near one end of the turntable, two symmetrically distributed arc sliding frames are fixedly mounted on the outer side of the arc frame, the turntable is rotatably mounted between the two arc sliding frames, two symmetrically distributed plug plates are fixedly mounted on the outer side of the turntable, two symmetrically distributed fixed blocks are fixedly mounted on the outer side of the welding gun, the outer sides of the two fixed blocks are respectively in contact with the outer sides of the two plug plates, two vertically distributed abutments are slidably mounted on the inner side of the fixed block, and the outer sides of the abutments are fixedly mounted. A spring is fixedly installed between the side and the inner side of the fixed block, the end of the block away from the spring is semicircular, and the outer side of the plug plate is provided with a plurality of circular slots symmetrically distributed in the center, and the circular slots are one-third circular structures. A gear ring is fixedly installed on the outer side of the turntable, and a second motor is fixedly installed on the outer side of the mounting shell, and a transmission gear matching the gear ring is fixedly installed on the output end of the second motor. The U-shaped card frame and the pull block are both arc-shaped structures, and a guide groove for the pull block to limit sliding is provided on the outer side of the turntable.

[0009] Preferably, a movable support is installed on the bottom of the mounting shell, and a driving slide that cooperates with the movable support is fixedly installed on the top of the device base.

[0010] Preferably, two symmetrically distributed positioning ribs are fixedly mounted on the inner side of the sleeve frame, and a sliding groove for limiting the sliding of the positioning ribs is provided on the outer side of the rocker arm.

[0011] Preferably, a plurality of anti-slip strips distributed symmetrically around the center are fixedly mounted on the outer side of the pressure wheel.

[0012] Preferably, a protrusion is provided on the top of the movable rod, and a support rod is fixedly mounted on the bottom of the protrusion, and a sliding hole for limiting the sliding of the support rod is provided on the surface of the positioning block.

[0013] Preferably, a magnet bar is fixedly mounted on the inner side of the U-shaped card frame.

[0014] Preferably, an arc-shaped baffle frame is fixedly installed on the outer side of the turntable.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a pipe fixing mechanism to enable the pressure wheels at both ends of the mounting shell to be in a synchronously contracted state and contact the outer side of the pipe body, thereby realizing adaptive clamping of the pipe body, facilitating the clamping and positioning of pipe bodies of more sizes, improving the stability of the clamping and positioning of the pipe body, and thus facilitating the rapid processing of pipe bodies of more sizes.

[0016] The present invention uses a positioning mechanism to swing the pull rod downward when the pressure wheel is close to the outer side of the pipe body. The pull rod can pull the welding gun close to the pipe body through the moving rod, so that the welding gun can be adjusted to the corresponding position according to the size of the pipe body, thereby improving the convenience of welding the pipe body.

[0017] The present invention uses a rotating welding mechanism, which can adjust the position of the welding gun by moving the rod so that the abutment block is placed in a circular slot of corresponding height to pre-position the welding gun, and the turntable drives the welding gun to rotate and weld, thereby achieving a comprehensive welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the turntable and the arc-shaped baffle frame in the present invention; Figure 3 This is a schematic diagram of the cylindrical bracket and the mounting shell structure of the present invention; Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A in the middle; Figure 5 Schematic diagram of the structure of the pressure wheel and the rocker arm in the present invention; Figure 6 This is a schematic diagram of the sleeve frame and pull rod structure in the present invention; Figure 7 This is a schematic diagram of the structure of the fixing block and the U-shaped card frame in the present invention; Figure 8 It is a schematic diagram of the structure of the abutment block and the inserting plate in the present invention.

[0019] In the figure: 1. device base; 2. lifting bracket; 3. mounting shell; 4. pipe body; 5. welding gun; 6. ring frame; 7. pressure roller; 8. moving rod; 9. turntable; 10. sleeve frame; 11. positioning rod; 12. rocker arm; 13. mounting rod; 14. cylindrical bracket; 15. worm; 16. arc rack; 17. first motor; 18. positioning block; 19. U-shaped clamping frame; 20. pulling block; 21. pulley; 22. pulling rod; 23. arc frame; 24. arc sliding frame; 25. plug-in plate; 26. fixing block; 27. resisting block; 28. spring; 29. gear ring; 30. second motor; 31. transmission gear; 32. moving support; 33. driving slide; 34. positioning rib; 35. anti-slip strip; 36. support rod; 37. magnet strip; 38. arc stop frame. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-8 The welding device for the prefabricated fire station shown in the figure includes a device base 1 and a lifting bracket 2 fixedly installed on the top of the device base 1. The lifting bracket 2 can place and adjust the height of the plate to be welded. A mounting shell 3 is provided on the top of the device base 1. A pipe body 4 is provided on the inner side of the mounting shell 3. The mounting shell 3 has a cylindrical structure to facilitate the insertion of the pipe body 4. A welding gun 5 is provided on the side of the mounting shell 3 close to the lifting bracket 2 for welding the pipe body 4 to the plate; it also includes: a pipe fixing mechanism for positioning pipe bodies 4 of more sizes, and the pipe fixing mechanism is installed on the inner side of the mounting shell 3.

[0022] The fixed pipe mechanism includes two annular frames 6 symmetrically mounted on both ends of the mounting shell 3, and four pressure wheels 7 symmetrically distributed in the center are provided on the inner side of the two annular frames 6. The pressure wheels 7 can resist the outer side of the pipe body 4. The fixed pipe mechanism also includes four sleeve frames 10 symmetrically arranged on the inner side of the annular frames 6. Two symmetrically distributed positioning rods 11 are fixedly installed on the outer side of the sleeve frame 10. The positioning rod 11 is rotatably mounted on the inner side of the annular frame 6. A rocker 12 is slidably mounted on the inner side of the sleeve frame 10. The four pressure wheels 7 are respectively fixedly mounted on one end of the four rocker 12, and the rocker 12 is away from the end of the pressure wheel 7. A mounting rod 13 is fixedly installed, and the mounting rod 13 is rotatably installed at the end of the mounting shell 3. When the annular frame 6 rotates, the swing rod 12 can be pulled by the sleeve frame 10 to swing with the mounting rod 13 as the fulcrum, so that the swing rod 12 drives the pressure wheel 7 to lean against the pipe body 4. The eight pressure wheels 7 can be adjusted accordingly according to the outer diameter of the pipe body 4 to achieve clamping of pipe bodies 4 of more sizes. A cylindrical bracket 14 is fixedly installed between the two annular frames 6. A worm 15 is rotatably installed on the inner side of the mounting shell 3. An arc-shaped rack 16 that cooperates with the worm 15 is fixedly installed on the outer side of the cylindrical bracket 14. When the worm 15 rotates, the cylindrical bracket 14 can be driven to rotate through the arc-shaped rack 16 to achieve synchronous adjustment of the two annular frames 6. A first motor 17 is fixedly installed on the outside of the mounting shell 3. The output end of the first motor 17 is fixedly connected to one end of the worm 15, so that the staff can adjust the rotation of the worm 15 through the first motor 17. A movable support 32 is installed at the bottom of the mounting shell 3, and a driving slide 33 that cooperates with the movable support 32 is fixedly installed on the top of the device base 1, so that the driving slide 33 can drive the movable support 32 to move horizontally, and the movable support 32 can drive the mounting shell 3 to move horizontally. The pipe body 4 in the shell 3 is against the plate on the lifting bracket 2. Two symmetrically distributed positioning ribs 34 are fixedly installed on the inner side of the sleeve frame 10. A sliding groove for limiting the sliding of the positioning rib 34 is opened on the outer side of the rocker arm 12, so that when the rocker arm 12 moves in the sleeve frame 10, the sliding groove on the rocker arm 12 can move along the outer side of the positioning rib 34, thereby improving the stability of the movement of the rocker arm 12. A plurality of anti-slip strips 35 symmetrically distributed in the center are fixedly installed on the outer side of the pressure wheel 7, so that the pressure wheel 7 is pressed against the outer side of the pipe body 4 through the anti-slip strips 35, thereby improving the friction between the pressure wheel 7 and the pipe body 4.

[0023] Example 2: Please refer to Figure 2-Figure 7, this embodiment further explains Example 1. The positioning mechanism in the figure includes a moving rod 8 arranged on the outside of the welding gun 5. The moving rod 8 can pull the welding gun 5 close to the welding port of the pipe body 4. The positioning mechanism also includes a positioning block 18 fixedly installed on the mounting shell 3 near one end of the lifting bracket 2. A long groove is provided on the outside of the moving rod 8, and the moving rod 8 is slidably installed on the outside of the positioning block 18 through the long groove. A U-shaped card frame 19 is fixedly installed on the outside of the moving rod 8, and a pulling block 20 is provided on the inner side of the U-shaped card frame 19. The pulling block 20 is fixedly installed on the outside of the welding gun 5. The moving rod 8 can move along the outside of the positioning block 18 through the long groove, so that the U-shaped card frame 19 pulls the welding gun 5 to move synchronously through the pulling block 20. A pulley 21 is rotatably installed on the bottom end of the moving rod 8, and a pull rod 22 is provided on the outside of the pulley 21. The outside of the pull rod 22 is provided with a sliding The groove of the wheel 21 limits the sliding of the pull rod 22, so that when the pull rod 22 swings, the pulley 21 can be pulled to move through the groove, and the pulley 21 can pull the moving rod 8 to move along the outside of the positioning block 18. The end of the pull rod 22 away from the pulley 21 is fixedly installed on the outside of the adjacent positioning rod 11, so that when the annular frame 6 pulls the rocking rod 12 to swing through the sleeve 10, the sleeve 10 drives the positioning rod 11 to rotate synchronously, so that the positioning rod 11 drives the pull rod 22 to swing, thereby adjusting the angle of the pull rod 22, and the welding gun 5 can move downward or upward to keep the welding point position with the pipe body 4. A protrusion is provided at the top of the moving rod 8, and a support rod 36 is fixedly installed at the bottom of the protrusion. The surface of the positioning block 18 is provided with a sliding hole for the support rod 36 to limit the sliding of the support rod 36, so that the moving rod 8 can drive the support rod 36 to move along the sliding hole on the positioning block 18, providing auxiliary support for the moving rod 8.

[0024] Example 3: Please refer to Figure 3-Figure 8, this embodiment is further explained for other embodiments. The transfer welding mechanism in the figure includes a turntable 9 arranged on the outside of the mounting shell 3. The turntable 9 can make the welding gun 5 perform circular motion and positioning welding. The transfer welding mechanism also includes an arc frame 23 fixedly mounted on the mounting shell 3 near one end of the turntable 9. Two symmetrically distributed arc sliding frames 24 are fixedly mounted on the outside of the arc frame 23. The turntable 9 is rotatably mounted between the two arc sliding frames 24, so that the arc frame 23 provides positioning for the turntable 9 through the arc sliding frame 24. Two symmetrically distributed plug plates are fixedly mounted on the outside of the turntable 9. 25, the outer side of the welding gun 5 is fixedly installed with two symmetrically distributed fixed blocks 26, the outer sides of the two fixed blocks 26 are in contact with the outer sides of the two inserting plates 25 respectively, and the inner side of the fixed block 26 is slidably installed with two vertically distributed abutments 27, and a spring 28 is fixedly installed between the outer side of the abutment 27 and the inner side of the fixed block 26. The abutment 27 is away from the end of the spring 28 and has a semicircular structure. The outer side of the inserting plate 25 is provided with a plurality of circular slots symmetrically distributed in the center, and the circular slots are a third of a circular structure, so that the welding gun 5 can drive the fixed The block 27 on the block 26 moves along the outer side of the insert plate 25, and the elasticity of the spring 28 is used to insert the block 27 into the circular slot of the corresponding height to achieve the pre-positioning of the welding gun 5. A gear ring 29 is fixedly installed on the outer side of the turntable 9, and a second motor 30 is fixedly installed on the outer side of the mounting shell 3. A transmission gear 31 that matches the gear ring 29 is fixedly installed on the output end of the second motor 30. When the second motor 30 is running, the gear ring 29 can be driven to rotate by the transmission gear 31, and the gear ring 29 can drive the turntable 9 to rotate, and the turntable 9 drives the welding gun 5 through the insert plate 25. The gun 5 moves along the welding point of the pipe body 4 to achieve comprehensive welding of the pipe body 4 and the plate. The U-shaped clamping frame 19 and the pulling block 20 are both arc-shaped structures. A guide groove for the sliding limit of the pulling block 20 is provided on the outer side of the turntable 9, so that the pulling block 20 can dock and disengage with the U-shaped clamping frame 19 when performing a circular motion. A magnet bar 37 is fixedly installed on the inner side of the U-shaped clamping frame 19 to facilitate docking between the U-shaped clamping frame 19 and the pulling block 20. An arc-shaped baffle frame 38 is fixedly installed on the outer side of the turntable 9. The arc-shaped baffle frame 38 can catch the welding slag generated by the welding gun 5, which is convenient for later cleaning.

[0025] Working principle: First, the staff inserts the pipe body 4 to be welded into the mounting shell 3 and places it between the four pressure wheels 7 on the inner side of the ring frame 6. At this time, the staff starts the first motor 17, and the first motor 17 drives the worm 15 to rotate. The worm 15 drives the cylindrical bracket 14 to rotate through the arc-shaped rack 16. The cylindrical bracket 14 drives the two ring frames 6 to rotate synchronously. The ring frame 6 drives the four sleeve frames 10 to do circular motion through the positioning rod 11, so that the sleeve frames 10 pull the swing rod 12 to swing with the mounting rod 13 as the fulcrum, and the swing rod 12 drives the pressure wheel 7 and The pipe body 4 is close to each other, and the four pressure wheels 7 on the inner side of the annular frame 6 can be synchronously close to the outer side of the pipe body 4 to achieve the clamping and positioning of the pipe body 4. At the same time, the positioning rod 11 docking with the pull rod 22 drives the pull rod 22 to swing synchronously, so that the pull rod 22 pulls the pulley 21 downward through the pull groove on its outer side, and the pulley 21 drives the moving rod 8 to move synchronously. The moving rod 8 moves along the outer side of the positioning block 18 through the long groove on its outer side, so that the moving rod 8 moves downward in a vertical state, and the moving rod 8 pulls the pull block 20 through the U-shaped card frame 19. The pulling block 20 drives the welding gun 5 to move, so that the two fixed blocks 26 on the outside of the welding gun 5 move along the outside of the two inserting plates 25 respectively, and the fixed block 26 drives the block 27 to move synchronously along the outside of the inserting plates 25. When the moving rod 8 stops moving, the elasticity of the spring 28 is used to insert the block 27 into the circular slot of the corresponding height on the inserting plate 25, so that the block 27 is against the inner side of the circular slot to achieve the pre-positioning of the welding gun 5. Then, the staff starts the driving slide 33, so that the driving slide 33 drives the movable support 32 to move, and the movable support 32 is moved. The seat 32 drives the mounting shell 3 close to the lifting bracket 2, so that the pipe body 4 contacts the plate on the lifting bracket 2. Finally, the staff starts the second motor 30, and the second motor 30 drives the transmission gear 31 to rotate. The transmission gear 31 drives the turntable 9 to rotate through the gear ring 29. The turntable 9 can drive the welding gun 5 to make a circular motion through the insert plate 25, so that the welding gun 5 welds the pipe body 4 and the plate, thereby achieving a comprehensive welding effect, facilitating the clamping and positioning of pipe bodies 4 of more sizes, and improving the convenience of welding the pipe body 4.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for an assembled fire station, characterized in that: include: A device base (1) and a lifting bracket (2) mounted on the top of the device base (1); a mounting shell (3) is provided on the top of the device base (1); a pipe body (4) is provided on the inner side of the mounting shell (3); and a welding gun (5) is provided on a side of the mounting shell (3) close to the lifting bracket (2); Also includes: A pipe fixing mechanism is used to position the pipe body (4) of more sizes. The pipe fixing mechanism is installed on the inner side of the mounting shell (3). The pipe fixing mechanism includes two annular frames (6) symmetrically mounted on the two ends of the mounting shell (3). Four pressing wheels (7) distributed in a central symmetrical manner are provided on the inner sides of the two annular frames (6). The pressing wheels (7) can press against the outer side of the pipe body (4). Four sleeve frames (10) are provided on the inner side of the annular frames (6). The sleeve frames (10) Two positioning rods (11) are fixedly installed on the outside of the annular frame (6), the positioning rods (11) are rotatably installed on the inside of the annular frame (6), a rocker rod (12) is slidably installed on the inside of the sleeve frame (10), the four pressing wheels (7) are respectively fixedly installed on one end of the four rocker rods (12), the other end of the rocker rod (12) is fixedly installed with a mounting rod (13), the mounting rod (13) is rotatably installed on the end of the mounting shell (3), and a cylindrical bracket (14) is installed between the two annular frames (6); A positioning mechanism for automatically adjusting the position of the welding gun (5), the positioning mechanism being mounted on the outside of the welding gun (5), the positioning mechanism comprising a moving rod (8) disposed on the outside of the welding gun (5), the moving rod (8) being capable of pulling the welding gun (5) close to the welding port of the pipe body (4); A transfer welding mechanism is used for fully welding the pipe body (4) and the plate. The transfer welding mechanism is installed on the outside of the welding gun (5). The transfer welding mechanism includes a turntable (9) arranged on the outside of the mounting shell (3). The turntable (9) can enable the welding gun (5) to perform circular motion and positioning welding.

2. The welding device for a prefabricated fire station according to claim 1, characterized in that: The fixed pipe mechanism further comprises a worm (15) rotatably mounted on the inner side of the mounting shell (3); an arc-shaped rack (16) is fixedly mounted on the outer side of the cylindrical bracket (14); a first motor (17) is mounted on the outer side of the mounting shell (3); an output end of the first motor (17) is fixedly connected to one end of the worm (15).

3. The welding device for a prefabricated fire station according to claim 2, characterized in that: The positioning mechanism also includes a positioning block (18) installed at one end of the mounting shell (3), a long groove is provided on the outer side of the moving rod (8), and the moving rod (8) is slidably installed on the outer side of the positioning block (18) through the long groove, a U-shaped card frame (19) is fixedly installed on the outer side of the moving rod (8), a pull block (20) is provided on the inner side of the U-shaped card frame (19), and the pull block (20) is fixedly installed on the outer side of the welding gun (5), a pulley (21) is rotatably installed on the bottom end of the moving rod (8), a pull rod (22) is provided on the outer side of the pulley (21), a pull groove is provided on the outer side of the pulley (21) for limiting sliding, and one end of the pull rod (22) is fixedly installed on the outer side of the adjacent positioning rod (11).

4. The welding device for a prefabricated fire station according to claim 3, characterized in that: The transfer welding mechanism further comprises an arc frame (23) mounted on one end of the mounting shell (3), two arc sliding frames (24) are mounted on the outer side of the arc frame (23), the turntable (9) is rotatably mounted between the two arc sliding frames (24), two inserting plates (25) are fixedly mounted on the outer side of the turntable (9), two fixed blocks (26) are fixedly mounted on the outer side of the welding gun (5), the outer sides of the two fixed blocks (26) are in contact with the outer sides of the two inserting plates (25) respectively, and two abutting blocks (27) are slidably mounted on the inner side of the fixed block (26) A spring (28) is fixedly installed between the outer side of the stop block (27) and the inner side of the fixed block (26), one end of the stop block (27) is in a semicircular structure, and a plurality of circular slots are provided on the outer side of the plug plate (25), and the circular slots are in a one-third circular structure. A gear ring (29) is fixedly installed on the outer side of the turntable (9), a second motor (30) is installed on the outer side of the mounting shell (3), and a transmission gear (31) is fixedly installed on the output end of the second motor (30), and the U-shaped card frame (19) and the pull block (20) are both in an arc structure.

5. The welding device for a prefabricated fire station according to claim 1, characterized in that: A movable support (32) is installed at the bottom of the mounting shell (3), and a driving slide (33) is installed at the top of the device base (1).

6. The welding device for a prefabricated fire station according to claim 2, characterized in that: Two positioning ribs (34) are fixedly mounted on the inner side of the sleeve frame (10), and a sliding groove for limiting the sliding of the positioning ribs (34) is provided on the outer side of the swing rod (12).

7. The welding device for a prefabricated fire station according to claim 2, characterized in that: A plurality of anti-slip strips (35) are fixedly mounted on the outer side of the pressing wheel (7).

8. The welding device for a prefabricated fire station according to claim 3, characterized in that: A protrusion is provided at the top of the moving rod (8), and a support rod (36) is installed at the bottom of the protrusion. A sliding hole for limiting the sliding of the support rod (36) is provided on the surface of the positioning block (18).

9. The welding device for a prefabricated fire station according to claim 4, characterized in that: A magnet strip (37) is installed on the inner side of the U-shaped card frame (19).

10. The welding device for a prefabricated fire station according to claim 4, characterized in that: An arc-shaped retaining frame (38) is installed on the outer side of the turntable (9).

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