Building fire pipe welding device

Abstract

The application discloses a building fire-fighting pipeline welding device, which comprises a mounting assembly, the mounting assembly comprises a mounting ring, a plug-in cavity, a movable frame, a supporting roller, a mounting threaded hole, a limiting wheel, a supporting shaft and a tension spring, the mounting ring is a hinged semicircular ring structure, a plug-in cavity is formed in one side of the mounting ring, a plurality of supporting rollers are rotatably installed on the edge of the plug-in cavity, a plurality of limiting wheels are movably arranged on one side of the supporting rollers, the limiting wheels are rotatably sleeved with the supporting shaft, one end of the supporting shaft is fixedly connected with the movable frame, one side wall of the middle part of the movable frame is fixedly connected with one end of the tension spring, the other end of the tension spring is fixedly connected with the inner wall of the plug-in cavity, and mounting threaded holes are formed in the two sides of the end surface of the mounting ring; and the active assembly comprises an active half ring, a connecting half ring, a plug-in block, a plug-in groove and a supporting sliding rail, the supporting sliding rail is slidably arranged between the supporting rollers and the limiting wheels, one end of the supporting sliding rail is fixedly connected with the active half ring and the connecting half ring respectively, and the two ends of the connecting half ring are provided with the plug-in groove.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically to a welding device for building fire protection pipelines. Background Technology

[0002] Fire protection pipelines refer to pipeline materials used in fire protection to connect fire protection equipment and materials, and to transport fire-fighting water, gas or other media.

[0003] Fire protection pipes are typically assembled and connected using welding, which requires welding equipment. For example, Chinese Patent Publication No. CN213764722U discloses a welding device for building fire protection pipes, specifically relating to the field of building fire protection technology. Its technical solution includes a positioning mechanism and a fixing device. The positioning mechanism includes a support box, with a vertical support plate fixedly installed at the rear end of the support box. A horizontal support plate is fixedly installed at the upper end of the vertical support plate, and a fixing device is fixedly installed at the lower end of the horizontal support plate. The fixing device includes a support rod installed at the lower end of the horizontal support plate, a connecting block fixedly installed at the lower end of the support rod, a pressure plate fixedly installed at the lower end of the connecting block, and a threaded rod fixedly installed at the upper end of the support rod. The threaded rod extends through the inner wall of the horizontal support plate to the upper end of the horizontal support plate. This patent, by setting a welding support box for building fire protection pipes, allows for convenient adjustment of the welding angle during welding. However, space within buildings is limited, and the gaps between fire protection pipes are generally small. This device is too large to meet the welding requirements of building fire protection pipes. Therefore, we propose a welding device for building fire protection pipes to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for building fire protection pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for building fire protection pipes, comprising an installation assembly, the installation assembly including an installation ring, a plug-in cavity, a movable frame, support rollers, installation threaded holes, limiting wheels, a support shaft, and a tension spring. The installation ring is a structure of two hinged semi-circular rings. A plug-in cavity is provided on one side of the installation ring. Several support rollers are rotatably mounted on the edge of the plug-in cavity. Several limiting wheels are movably mounted on one side of the support rollers. The support shaft is rotatably sleeved inside the limiting wheels. One end of the support shaft is fixedly connected to the movable frame. The movable frame is movably disposed in the plug-in cavity, and one end of the tension spring is fixedly connected to one side wall of the middle part of the movable frame. The other end of the tension spring is fixedly connected to the inner wall of the plug-in cavity. Installation threaded holes are respectively provided on both sides of one end face of the installation ring.

[0006] An active component includes an active half-ring, a connecting half-ring, a plug-in block, a plug-in groove, and a support slide rail. The support slide rail is slidably disposed between a support roller and a limiting wheel. One end of the support slide rail is fixedly connected to the active half-ring and the connecting half-ring, respectively. Plug-in grooves are respectively opened at both ends of the connecting half-ring. Plug-in blocks are interference-fitted into the plug-in grooves. One end of each plug-in block is fixedly connected to both ends of the active half-ring. A welding torch is fixedly installed in the middle of one end face of the active half-ring. A motor is fixedly installed in the middle of the connecting half-ring, and a grinding head is fixedly connected to the output shaft of the motor.

[0007] Preferably, an adjustment knob is threaded onto both sides of the mounting ring, and a pressure plate is rotatably connected to the opposite end of each adjustment knob.

[0008] Preferably, the pressure plate has an arc-shaped structure, and rubber plates are fixedly connected to opposite end faces of the pressure plate.

[0009] Preferably, the outer walls of the active semi-ring and the connecting semi-ring are respectively fixedly connected with anti-slip plates.

[0010] Preferably, the vertical cross-section of the supporting slide rail is an L-shaped structure.

[0011] Preferably, the assembly also includes a connector, which comprises a rod body, a rotating pin, a connecting rod, a threaded rod one, a push block, and a threaded rod two. One end of the rod body is fixedly connected to the rotating pin, and the rotating pin is rotatably sleeved on one end of the connecting rod. The other end of the connecting rod is fixedly connected to the threaded rod two, and the other end of the rod body is fixedly connected to the threaded rod one. The end of the threaded rod one away from the rod body is rotatably connected to the push block. The threaded rod one is connected to the mounting threaded hole through a threaded structure, and the push block is in sliding contact with the movable frame.

[0012] Preferably, the contact surface between the push block and the movable frame is provided with a slope with a horizontal angle of forty degrees.

[0013] Preferably, hexagonal caps are fixedly fitted onto the opposite sides of threaded rod one and threaded rod two.

[0014] Preferably, it further includes a support assembly, which includes a support ring, an adjusting knob two, a clamping plate, a plug hole, and a threaded mounting hole. The support ring is a structure of two hinged semi-circular rings. The inner diameter of the support ring and the mounting ring are equal. The two sides of the support ring are respectively connected to the adjusting knob two through a threaded structure. The opposite ends of the adjusting knob two are respectively rotatably connected to the clamping plate. The clamping plate is an arc-shaped structure. The bottom two sides of one end face of the support ring are respectively provided with a plug hole. The top and bottom two sides of one end face of the support ring are respectively provided with a threaded mounting hole. The threaded mounting hole at the top is threadedly engaged with the threaded rod two.

[0015] Preferably, the assembly further includes a slag collection component, which comprises an arc-shaped plate, a collection groove, a first insertion screw, a second insertion screw, and a movable insert rod. The first insertion screw is rotatably installed at the center of one end face of the arc-shaped plate, and the first insertion screw is threadedly engaged with a bottom threaded mounting hole. The second insertion screw is rotatably installed at the center of the other end face of the arc-shaped plate, and the second insertion screw is threadedly engaged with a mounting threaded hole. The top of the arc-shaped plate is recessed with a collection groove. Movable insert rods are movably sleeved on both sides of one end face of the arc-shaped plate, and the movable insert rods are inserted into the insertion holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the installation component is fitted over the fire pipe that needs to be welded, and together with the connector and support components, it improves the stability of the pipes on both sides of the welding position, ensures the flatness of the weld during welding, and improves the aesthetics of the weld by grinding and cleaning the weld with a grinding head. The installation component and support components that form a complete circular structure reduce the overall area occupied and are more suitable for the welding needs of building fire pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the mounting ring structure in this invention;

[0020] Figure 4 This is a schematic diagram of the support component structure in this invention;

[0021] Figure 5 This is a schematic diagram of the mounting ring and active component structure in this invention;

[0022] Figure 6 This is a schematic diagram of the top structure of the vertical cross-section of the present invention;

[0023] Figure 7 This is a schematic diagram of the slag collection component structure in this invention.

[0024] In the diagram: 1. Mounting assembly; 11. Mounting ring; 12. Adjusting knob one; 13. Insertion cavity; 14. Movable frame; 15. Support roller; 16. Mounting threaded hole; 17. Limiting wheel; 18. Support shaft; 19. Pressure plate; 10. Tension spring; 2. Connecting piece; 21. Rod body; 22. Rotating pin; 23. Connecting rod; 24. Threaded rod one; 25. Push block; 26. Threaded rod two; 3. Support assembly; 31. Support 32. Adjustment knob II; 33. Pressure plate; 34. Insertion hole; 35. Threaded mounting hole; 4. Active assembly; 41. Active half-ring; 42. Connecting half-ring; 43. Anti-slip plate; 44. Insertion block; 45. Insertion groove; 46. Support slide rail; 5. Welding torch; 6. Slag collection assembly; 61. Arc plate; 62. Collection trough; 63. Insertion screw I; 64. Insertion screw II; 65. Movable insertion rod; 7. Grinding head. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] Reference Figure 1-7 This is the first embodiment of the present invention. This embodiment provides a welding device for building fire protection pipes, including an installation component 1. The installation component 1 includes an installation ring 11, a plug cavity 13, a movable frame 14, a support roller 15, a mounting threaded hole 16, a limiting wheel 17, a support shaft 18, and a tension spring 10. The installation ring 11 is a structure of two hinged semi-circular rings. A plug cavity 13 is opened on one side of the installation ring 11. Several support rollers 15 are rotatably installed on the edge of the plug cavity 13. Several limiting wheels 17 are movably arranged on one side of the support rollers 15. The support shaft 18 is rotatably sleeved inside the limiting wheel 17. One end of the support shaft 18 is fixedly connected to the movable frame 14. The movable frame 14 is movably disposed in the plug cavity 13, and one end of the tension spring 10 is fixedly connected to one side wall of the middle part of the movable frame 14. The other end of the tension spring 10 is fixedly connected to the inner wall of the plug cavity 13. Mounting threaded holes 16 are opened on both sides of one end face of the installation ring 11.

[0028] Active component 4 includes an active half-ring 41, a connecting half-ring 42, a plug-in block 44, a plug-in groove 45, and a support slide rail 46. The support slide rail 46 is slidably disposed between the support roller 15 and the limiting wheel 17. One end of the support slide rail 46 is fixedly connected to the active half-ring 41 and the connecting half-ring 42 respectively. The two ends of the connecting half-ring 42 are respectively provided with plug-in grooves 45. The plug-in block 44 is interference-fitted into the plug-in groove 45. One end of the plug-in block 44 is fixedly connected to the two ends of the active half-ring 41 respectively. A welding gun 5 is fixedly installed in the middle of one end face of the active half-ring 41. A motor is fixedly installed in the middle of the connecting half-ring 42, and a grinding head 7 is fixedly connected to the output shaft of the motor.

[0029] Open the mounting ring 11 of mounting component 1 to open the two semi-circular mounting rings 11. Then, place the mounting ring 11 over the fire pipe to be welded. Then close the mounting ring 11 to form a complete circular structure. Secure the mounting ring 11 with bolts or clips. Then, insert the support slide rail 46 of the connecting half ring 42 of the active component 4 into the insertion cavity 13. The inner wall of the support slide rail 46 contacts the outer wall of the support roller 15. Then, in the same manner, insert the active half ring 41 into the insertion cavity 13. At the same time, the insertion blocks 44 fixed at both ends of the active half ring 41 are inserted into the insertion grooves 45. The insertion blocks 44 and the insertion grooves 45 are interference-fitted, so that the two active half rings 41 and The connecting half-ring 42 forms a complete circular structure. The position of the mounting component 1 is adjusted so that the welding head of the welding gun 5 is located at the position to be welded. The position of the movable frame 14 is fixed by inserting a limit rod into the mounting threaded hole 16, so that the support slide rail 46 is slidably fixed to prevent the support slide rail 46 from falling off. During the welding operation, the welding gun 5 is connected to the welding equipment. By moving the anti-slip plate 43 of the active component 4, the active half-ring 41 and the connecting half-ring 42 are driven to rotate circumferentially. When the active half-ring 41 rotates circumferentially, it drives the welding gun 5 to weld the fire pipe. At the same time, the motor works and drives the grinding head 7 to rotate. The grinding head 7 grinds the weld seam, thereby ensuring the flatness and aesthetics of the weld.

[0030] Example 2

[0031] Reference Figure 1-7 This is the second embodiment of the present invention, based on the previous embodiment. Specifically, adjusting knobs 12 are threaded onto both sides of the mounting ring 11, and pressure plates 19 are rotatably connected to opposite ends of the adjusting knobs 12. Rotating the adjusting knobs 12 causes them to move closer to the fire-fighting pipe, which in turn causes the rotatably connected pressure plates 19 to move closer to the fire-fighting pipe. The two pressure plates 19 clamp the fire-fighting pipe, ensuring that the position of the mounting assembly 1 is fixed.

[0032] Reference Figure 3Furthermore, the pressure plate 19 has an arc-shaped structure, and rubber plates are fixedly connected to opposite ends of the pressure plate 19. The arc-shaped pressure plate 19 is more compatible with the outer wall of the fire pipe. At the same time, the rubber plates increase the friction between the pressure plate 19 and the fire pipe, and also prevent the pressure plate 19 from damaging the fire pipe.

[0033] Reference Figure 1 Specifically, the outer walls of the active semi-ring 41 and the connecting semi-ring 42 are respectively fixedly connected with anti-slip plates 43, which improve the friction during operation.

[0034] Reference Figure 5 and Figure 6 Specifically, the vertical section of the support slide rail 46 is an L-shaped structure. When the L-shaped support slide rail 46 is placed between the support roller 15 and the limiting wheel 17, the limiting wheel 17 limits and fixes the support slide rail 46 to prevent it from detaching.

[0035] Reference Figure 1 and Figure 6 Specifically, it also includes a connector 2, which includes a rod 21, a rotating pin 22, a connecting rod 23, a threaded rod 24, a push block 25, and a threaded rod 26. One end of the rod 21 is fixedly connected to the rotating pin 22, and the rotating pin 22 is rotatably sleeved onto one end of the connecting rod 23. The other end of the connecting rod 23 is fixedly connected to the threaded rod 26, and the other end of the rod 21 is fixedly connected to the threaded rod 24. The end of the threaded rod 24 away from the rod 21 is rotatably connected to the push block 25. The threaded rod 24 is connected to the mounting threaded hole 16 through a threaded structure, and the push block 25 is in sliding contact with the movable frame 14.

[0036] The push block 25 of the connector 2 is inserted into the mounting threaded hole 16 at the top of the mounting ring 11. The push block 25 contacts the top inclined surface of the movable frame 14. The threaded rod 24 is rotated and engages with the mounting threaded hole 16 at the top. After the threaded rod 24 is tightened, the movable frame 14 moves toward the support slide rail 46. At the same time, the outer wall of the limit wheel 17 abuts against the support slide rail 46 and engages with the support slide rail 46, which has an L-shaped cross-section, to prevent the active half ring 41 and the connecting half ring 42 from disengaging.

[0037] Reference Figure 1 and Figure 6 Furthermore, the contact surface between the push block 25 and the movable frame 14 is provided with a horizontal ramp with an included angle of forty degrees. The ramp makes the contact between the push block 25 and the movable frame 14 smoother.

[0038] Reference Figure 1 and Figure 6Furthermore, hexagonal caps are fixedly fitted on opposite sides of threaded rod 24 and threaded rod 26, which facilitates the rotation of threaded rod 24 and threaded rod 26.

[0039] Reference Figure 4 Specifically, it also includes a support component 3, which includes a support ring 31, an adjustment knob 32, a clamping plate 33, a plug hole 34, and a threaded mounting hole 35. The support ring 31 is a structure of two hinged semi-circular rings. The inner diameter of the support ring 31 is equal to that of the mounting ring 11. The two sides of the support ring 31 are respectively connected to the adjustment knob 32 through a threaded structure. The opposite ends of the adjustment knob 32 are respectively rotatably connected to the clamping plate 33. The clamping plate 33 is an arc-shaped structure. The bottom two sides of one end face of the support ring 31 are respectively provided with a plug hole 34, and the top and bottom two sides of one end face of the support ring 31 are respectively provided with a threaded mounting hole 35. The top threaded mounting hole 35 is threadedly engaged with the threaded rod 26.

[0040] Open the support ring 31 of the support assembly 3, put the support ring 31 over another fire pipe that needs to be welded, then close the support ring 31 and fix it with bolts or clips. Then, the threaded rod 26 of the connector 2 mates with the threaded mounting hole 35 on the top of the support ring 31. After tightening the threaded rod 26, the position of the support ring 31 is fixed. At the same time, the support ring 31, together with the connector 2 and the slag collection assembly 6, supports and fixes the fire pipe on the other side of the welding position, ensuring the flatness of the weld.

[0041] Reference Figure 1 and Figure 7 Specifically, it also includes a slag collection assembly 6, which includes an arc-shaped plate 61, a collection groove 62, a first insertion screw 63, a second insertion screw 64, and a movable insertion rod 65. The first insertion screw 63 is rotatably installed in the middle of one end face of the arc-shaped plate 61, and the first insertion screw 63 is threadedly engaged with the bottom threaded mounting hole 35. The second insertion screw 64 is rotatably installed in the middle of the other end face of the arc-shaped plate 61, and the second insertion screw 64 is threadedly engaged with the mounting threaded hole 16. The top of the arc-shaped plate 61 is recessed with a collection groove 62. Movable insertion rods 65 are movably sleeved on both sides of one end face of the arc-shaped plate 61, and the movable insertion rods 65 are inserted into the insertion holes 34.

[0042] Reference Figure 1 and Figure 7The first insertion screw 63 of the slag collection assembly 6 mates with the mounting threaded hole 16 at the bottom of the mounting ring 11, allowing the arc-shaped plate 61 to be installed at the bottom of the fire-fighting pipe. The second insertion screw 64 of the slag collection assembly 6 mates with the threaded mounting hole 35 at the bottom of the support ring 31. After tightening the second insertion screw 64, the position of the arc-shaped plate 61 is fixed. At the same time, the movable insertion rods 65, which are movably installed on both sides of the arc-shaped plate 61, are inserted into the insertion holes 34. The ends of the movable insertion rods 65 are fixedly connected to springs, and the springs are movably located within the arc-shaped plate 61. The movable insert rod 65, under the elastic force of the spring, ensures a stable fit with the insertion hole 34, preventing the movable insert rod 65 from dislodging from the insertion hole 34, thereby ensuring the position of the arc plate 61 is fixed and preventing the arc plate 61 from flipping over. This ensures that the collection trough 62 is always located at the bottom of the fire pipe weld. During the welding operation, the grinding head 7 grinds the weld, thereby ensuring the flatness and aesthetics of the weld. The weld slag after grinding falls into the collection trough 62 under the action of gravity for collection, avoiding pollution of the building environment.

[0043] Example 3

[0044] Reference Figure 1-7This is the third embodiment of the present invention. Based on the previous two embodiments, in use, the mounting ring 11 of the mounting assembly 1 is opened, causing the two semi-circular mounting rings 11 to open. Then, the mounting rings 11 are placed over the fire-fighting pipe to be welded. The mounting rings 11 are then closed, forming a complete circular structure. The mounting rings 11 are fixed with bolts or clips. Then, the support rail 46 of the connecting half-ring 42 of the active assembly 4 is inserted into the insertion cavity 13. The inner wall of the support rail 46 contacts the outer wall of the support roller 15. Then, the active half-ring 41 is inserted into the insertion cavity 13 in the same manner. Simultaneously, the insertion blocks 44 fixed at both ends of the active half-ring 41 are inserted into the insertion grooves 45. The insertion blocks 44 and the insertion grooves 45 are interference-fitted, allowing the two active half-rings 41 to... The connecting half-ring 42 forms a complete circular structure. Adjust the position of the mounting component 1 so that the welding head of the welding gun 5 is located at the position to be welded. Then, rotate the adjustment knob 12 to move it closer to the fire pipe. The adjustment knob 12 then moves the rotating pressure plate 19 closer to the fire pipe. The two pressure plates 19 clamp the fire pipe to ensure that the position of the mounting component 1 is fixed. Then, the push block 25 of the connector 2 is inserted into the mounting threaded hole 16 at the top of the mounting ring 11. The push block 25 contacts the top inclined surface of the movable frame 14. Rotate the threaded rod 24. The threaded rod 24 engages with the top mounting threaded hole 16. After tightening the threaded rod 24, the movable frame 14 moves toward the support slide rail 46, and at the same time, it drives the outer wall of the limit wheel 17 to abut. The support slide rail 46 is engaged with the L-shaped cross-section support slide rail 46 to prevent the active half-ring 41 and the connecting half-ring 42 from disengaging. The insertion screw 63 of the slag collection assembly 6 engages with the installation threaded hole 16 at the bottom of the mounting ring 11, allowing the arc plate 61 to be installed at the bottom of the fire pipe. Then, the support ring 31 of the support assembly 3 is opened and placed over another fire pipe that needs to be welded. The support ring 31 is then closed and fixed with bolts or clips. Then, the threaded rod 26 of the connector 2 engages with the threaded mounting hole 35 at the top of the support ring 31. After tightening the threaded rod 26, the position of the support ring 31 is fixed. At the same time, the insertion screw 64 of the slag collection assembly 6 engages with the threaded mounting hole 35 at the bottom of the support ring 31. After tightening the insertion screw 64, the position of the support ring 31 is fixed. After step 64, the position of the arc-shaped plate 61 is fixed. Simultaneously, the movable inserts 65, movably mounted on both sides of the arc-shaped plate 61, are inserted into the insertion holes 34. The ends of the movable inserts 65 are fixedly connected to springs, which are movably positioned within the arc-shaped plate 61. Under the elastic force of the springs, the movable inserts 65 ensure a stable fit with the insertion holes 34, preventing them from dislodging and thus ensuring the position of the arc-shaped plate 61 is fixed, preventing it from flipping over. This ensures that the collection trough 62 remains at the bottom of the fire-fighting pipeline weld. During welding, the welding torch 5 is connected to the welding equipment. By moving the anti-slip plate 43 of the active component 4, the active semi-ring 41 and the connecting semi-ring 42 rotate circumferentially. As the active semi-ring 41 rotates circumferentially, it drives the welding torch 5 to weld the fire-fighting pipeline.Simultaneously, the motor operates, driving the grinding head 7 to rotate. The grinding head 7 grinds the weld seam, ensuring the smoothness and aesthetics of the weld. The weld slag, after grinding, falls into the collection tank 62 under gravity for collection, preventing pollution of the building environment.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for building fire protection pipes, characterized in that: include The mounting assembly (1) includes a mounting ring (11), a insertion cavity (13), a movable frame (14), support rollers (15), a mounting threaded hole (16), a limiting wheel (17), a support shaft (18), and a tension spring (10). The mounting ring (11) is a structure of two hinged semi-circular rings. An insertion cavity (13) is provided on one side of the mounting ring (11). Several support rollers (15) are rotatably mounted on the edge of the insertion cavity (13). One of the support rollers (15) is... The side is provided with several limiting wheels (17), and the limiting wheels (17) are rotatably sleeved with the support shaft (18). One end of the support shaft (18) is fixedly connected to the movable frame (14). The movable frame (14) is movably disposed in the insertion cavity (13), and one end of the tension spring (10) is fixedly connected to one side wall of the middle part of the movable frame (14). The other end of the tension spring (10) is fixedly connected to the inner wall of the insertion cavity (13). The mounting ring (11) has mounting thread holes (16) on both sides of one end face. Active component (4), the active component (4) includes active half ring (41), connecting half ring (42), plug block (44), plug groove (45), and support slide rail (46). The support slide rail (46) is slidably disposed between support roller (15) and limit wheel (17). One end of the support slide rail (46) is fixedly connected to the active half ring (41) and the connecting half ring (42). The two ends of the connecting half ring (42) are respectively provided with plug groove (45). The plug block (44) is interference connected in the plug groove (45). One end of the plug block (44) is fixedly connected to the two ends of the active half ring (41). A welding gun (5) is fixedly installed in the middle of one end face of the active half ring (41). A motor is fixedly installed in the middle of the connecting half ring (42) and a grinding head (7) is fixedly connected to the output shaft of the motor.

2. The welding device for building fire protection pipelines according to claim 1, characterized in that: The two sides of the mounting ring (11) are respectively fitted with adjustment knobs (12) through a threaded structure, and the opposite ends of the adjustment knobs (12) are respectively rotatably connected to pressure plates (19).

3. The welding device for building fire protection pipelines according to claim 2, characterized in that: The pressure plate (19) has an arc-shaped structure, and rubber plates are fixedly connected to opposite end faces of the pressure plate (19).

4. The welding device for building fire protection pipelines according to claim 1, characterized in that: The outer walls of the active semi-ring (41) and the connecting semi-ring (42) are respectively fixedly connected with anti-slip plates (43).

5. The welding device for building fire protection pipelines according to claim 1, characterized in that: The vertical cross-section of the support slide rail (46) is an L-shaped structure.

6. The welding device for building fire protection pipelines according to claim 1, characterized in that: It also includes a connector (2), which includes a rod (21), a rotating pin (22), a connecting rod (23), a threaded rod one (24), a push block (25), and a threaded rod two (26). One end of the rod (21) is fixedly connected to the rotating pin (22), and the rotating pin (22) is rotatably sleeved on one end of the connecting rod (23). The other end of the connecting rod (23) is fixedly connected to the threaded rod two (26), and the other end of the rod (21) is fixedly connected to the threaded rod one (24). The end of the threaded rod one (24) away from the rod (21) is rotatably connected to the push block (25). The threaded rod one (24) is connected to the mounting threaded hole (16) through a threaded structure, and the push block (25) is in sliding contact with the movable frame (14).

7. A welding device for building fire protection pipelines according to claim 6, characterized in that: The contact surface between the push block (25) and the movable frame (14) is provided with a slope with a horizontal angle of forty degrees.

8. A welding device for building fire protection pipelines according to claim 6, characterized in that: Hexagonal caps are fixedly fitted on opposite sides of threaded rod one (24) and threaded rod two (26).

9. A welding device for building fire protection pipelines according to claim 6, characterized in that: It also includes a support assembly (3), which includes a support ring (31), an adjustment knob (32), a pressure plate (33), a plug hole (34), and a threaded mounting hole (35). The support ring (31) is a structure of two hinged semi-circular rings. The inner diameter of the support ring (31) is equal to that of the mounting ring (11). The two sides of the support ring (31) are respectively connected to the adjustment knob (32) through a threaded structure. The opposite end of the adjustment knob (32) is rotatably connected to the pressure plate (33). The pressure plate (33) is an arc-shaped structure. The bottom two sides of one end face of the support ring (31) are respectively provided with a plug hole (34). The top and bottom two sides of one end face of the support ring (31) are respectively provided with a threaded mounting hole (35). The threaded mounting hole (35) at the top is threadedly engaged with the threaded rod (26).

10. A welding device for building fire protection pipelines according to claim 9, characterized in that: It also includes a slag collection assembly (6), which includes an arc-shaped plate (61), a collection groove (62), a first plug-in screw (63), a second plug-in screw (64), and a movable plug (65). The first plug-in screw (63) is rotatably installed in the middle of one end face of the arc-shaped plate (61), and the first plug-in screw (63) is threadedly engaged with the bottom threaded mounting hole (35). The second plug-in screw (64) is rotatably installed in the middle of the other end face of the arc-shaped plate (61), and the second plug-in screw (64) is threadedly engaged with the mounting threaded hole (16). The top of the arc-shaped plate (61) is recessed with a collection groove (62). Movable plugs (65) are movably sleeved on both sides of one end face of the arc-shaped plate (61), and the movable plugs (65) are inserted into the plug-in hole (34).

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