Low-error welding device for ventilating duct

Abstract

The invention discloses a ventilation pipeline low-error welding device, which relates to the technical field of pipeline welding, and comprises a welding gun body and a gun head, and further comprises an auxiliary positioning mechanism which is arranged on one side of the outer wall of the welding gun body and one side of the outer wall of the gun head and is used for performing auxiliary guiding on a connector when a pipeline is welded, the linkage locking mechanisms are arranged on the two sides of the auxiliary positioning mechanism and used for self-locking to guarantee smoothness of a welding spot when a pipeline connector is not flat or curved, and the clamping and locking mechanisms are arranged at the tops of the linkage locking mechanisms and used for adjusting and fixing. The low-error welding device for the ventilation pipeline is provided with the auxiliary positioning mechanism and the linkage locking mechanism, the auxiliary positioning mechanism and the linkage locking mechanism enable the low-error welding device for the ventilation pipeline to quickly complete the welding step when the low-error welding device is used for welding a pipeline connector, and therefore the welding process becomes simple and efficient; and the efficiency is maintained, and meanwhile, very high accuracy is achieved, so that the welding error is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to a pipeline welding technical field, in particular to a ventilation pipeline low-error welding device. BACKGROUND

[0002] A ventilation pipeline low-error welding device is a device required when a ventilation pipeline is welded, generally a welding gun is used for welding, when the ventilation pipeline is manufactured, a plate material used for manufacturing the pipeline is cut and folded, the plate material is pressed into a required shape, and then the joint of the plate material is welded, because the plate material is folded, welding is required at the joint, and the welding is used for ensuring the sealing property of the pipeline.

[0003] As disclosed in the patent No. CN113305399A, a square ventilation pipeline automatic welding device is disclosed, which comprises a rack and an electric control box, characterized in that: a workpiece lifting platform is arranged above the rack, a welding system is arranged above the workpiece lifting structure, the welding system comprises a welding gun and a walking mechanism, the walking mechanism comprises a lead screw, the lead screw is connected with a first stepper motor, the welding gun is fixed on a welding gun clamp, the welding gun clamp is connected with a sliding box, a sliding block is arranged on the inner side of the sliding box, the sliding block is connected with the first lead screw and can slide left and right along the first lead screw, a cross beam is arranged below the walking mechanism, the cross beam is fixed on the rack, one-way pressing mechanisms are arranged on the outer side and the upper side of the cross beam, the workpiece lifting platform lifts the workpiece, and the pressing mechanisms press and fix the workpiece on the cross beam, the application provides a square ventilation pipeline automatic welding device, realizes hole-free welding under the condition that no filler wire is filled, the height of the welded part is convenient to adjust, the device structure is simple, and the manufacturing cost is low.

[0004] Although the automatic welding equipment of the ventilation pipe has been available at present, the equipment can only weld the square pipe, and the ventilation pipe can be installed in different environments, so the ventilation pipe can be designed into different shapes, such as a circular shape, a special shape, and the like, and for the special-shaped ventilation pipe, manual welding is generally performed, and manual welding can be performed according to the shape of the pipe, but there are certain problems, manual welding is mostly dependent on the experience of workers, so as to ensure the precision of welding, which leads to low efficiency of the workers, and if the welding efficiency is required, multiple people can cooperate to weld, which can lead to uneven welding, and small defects are prone to occur, and because the two surfaces of the pipe to be welded are cut, the two surfaces of the pipe to be welded can not be smooth straight lines, but curves with a small angle, which requires higher welding skills of the workers, and the labor cost is also higher, although the high-precision automatic equipment is available, the cost of the equipment is high, which can bring certain production cost to the manufacturers, so the current ventilation pipe welding is mostly manual welding, and therefore an auxiliary device for improving the welding efficiency and the welding precision in the field of manual welding is required.

[0005] In view of the above problems, it is urgent to make an innovative design on the basis of the original ventilation pipe low-error welding device. SUMMARY

[0006] The technical scheme of the present application provides a significantly different solution from the prior art to solve the problem that the precision and efficiency cannot be kept in synchronization during manual welding.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a ventilation pipe low-error welding device, comprising a welding gun body and a gun head, further comprising an auxiliary positioning mechanism arranged on one side of the outer wall of the welding gun body and the gun head for assisting the guidance of the interface during welding of the pipe, a linkage locking mechanism arranged on both sides of the auxiliary positioning mechanism for self-locking when encountering a non-flat or curved pipe interface to ensure smooth welding points, and a locking mechanism arranged on the top of the linkage locking mechanism for adjustment and fixation. The auxiliary positioning mechanism comprises a connecting rod arranged on one side of the outer wall of the welding gun body and the gun head, one end of the connecting rod is provided with a connecting telescopic rod, one end of the connecting telescopic rod is connected with a reset plate, and the bottom of the outer wall of the reset plate is provided with an auxiliary head. The linkage locking mechanism comprises an adjusting telescopic rod movably mounted on both sides of the connecting rod, one end of the adjusting telescopic rod is connected with a connecting shell, the bottom of the outer wall of the connecting shell is connected with a movable clamping groove, and the inner wall of the movable clamping groove is movably provided with a movable ball.

[0008] Preferably, the outer wall of the connecting telescopic rod is provided with an auxiliary spring, the outer wall of the reset plate is provided with a connecting plate on both sides, the outer wall of the connecting plate is provided with a push rod, the bottom of one side of the outer wall of the body of the welding gun and the gun head is provided with a mounting plate, the bottom of the outer wall of the mounting plate is provided with a connecting head, and one end of the connecting head is connected with a hose.

[0009] Preferably, the inner wall of the connecting shell is provided with a push-and-press compartment, the inner wall of the push-and-press compartment is movably provided with a push plate, the bottom of the outer wall of the push plate is connected with a sliding rod, one end of the sliding rod is provided with a reset spring, one end of the sliding rod is connected with a clamping block, and the outer wall of the movable ball is connected with a magnetic roller.

[0010] Preferably, the locking mechanism comprises a gear movably connected with the other end of the adjusting telescopic rod, one side of the gear is provided with a sliding groove, the inner wall of the sliding groove is movably provided with a clamping rod, and the outer wall of the clamping rod is provided with a force receiving rod.

[0011] Preferably, the three-dimensional view of the auxiliary head is in the shape of a cylinder, and one end of the auxiliary head is in the shape of a cone.

[0012] Preferably, one end of the hose is connected with the inner wall of the push-and-press compartment, and the inner wall of the push-and-press compartment is provided with a liquid.

[0013] Preferably, the bottom of the outer wall of the push-and-press compartment is provided with a cavity, and the sliding rod penetrates through the cavity of the push-and-press compartment and is connected with the clamping block.

[0014] Preferably, the bottom of the outer wall of the clamping block is in the shape of a semicircle, and the bottom of the outer wall of the clamping block is matched with the outer wall of the movable ball.

[0015] Preferably, the outer wall of the mounting plate is provided with a cavity, the push rod penetrates through the cavity of the mounting plate, and the diameter of the push rod is matched with the diameter of the inner wall of the connecting head.

[0016] Preferably, the outer wall of the mounting plate is provided with a cavity, the push rod penetrates through the cavity of the mounting plate, and the diameter of the push rod is matched with the diameter of the inner wall of the connecting head.

[0017] Compared with the prior art, the present application has the following advantages: 1. The present application can quickly complete the welding steps when welding the pipe interface by the auxiliary positioning mechanism and the linkage locking mechanism, and can ensure the smoothness and accuracy of the welding interface, because the conical design of the auxiliary head end, so that the auxiliary head end can assist the positioning of the welding gun body and the gun head at the interface of the pipe, so that the welding gun body and the gun head can always keep synchronous welding with the interface during welding, and the linkage locking mechanism inside uses the setting of the movable ball and the magnetic roller to make the magnetic roller can move at any angle on the outer wall of the pipe, so that the welding of the welding gun body and the gun head can always keep stable, so that the welding process becomes simple and efficient, and has very high accuracy while maintaining efficiency, thereby reducing the error of welding.

[0018] 2. The present application can ensure a certain flexibility when the user welds the pipe by the auxiliary positioning mechanism and the linkage locking mechanism, the magnetic attraction between the magnetic roller and the pipe allows the magnetic roller to roll along the outer wall of the pipe when the user welds, and the magnetic roller can be adjusted at any angle, thereby ensuring the flexibility and versatility of the present application, and the connecting head is rigidly set, and the hose has a certain adjustability, so that the push rod can move without being slightly folded to cause gas blockage when the user adjusts the angle of the telescopic rod, so that the multi-angle adjustable setting makes the present application very flexible when dealing with special-shaped pipes, and can improve the welding efficiency while reducing the error rate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall structure schematic diagram of the present application; Figure 2 is the position structure schematic diagram of the auxiliary positioning mechanism, linkage locking mechanism and locking mechanism of the present application; Figure 3 is the connecting rod part structure schematic diagram of the auxiliary positioning mechanism of the present application; Figure 4 is the telescopic rod part structure schematic diagram of the linkage locking mechanism of the present application; Figure 5 is the auxiliary positioning mechanism of the present application Figure 4 is the local enlarged structure schematic diagram of the marked A; Figure 6 is the structure schematic diagram of the connecting shell and the push-in warehouse of the present application; Figure 7 is the internal structure sectional view of the linkage locking mechanism of the present application; Figure 8 is the structure schematic diagram of the reset plate and the connecting plate of the present application; Figure 9 Structure diagram of the push plate, slide rod, return spring and clamping block of the application; Figure 10 Structure diagram of the movable clamping groove and movable ball of the application; Figure 11 Structure diagram of the connecting plate, connecting head and hose of the application; Figure 12 Sectional view of the hose part of the auxiliary positioning mechanism of the application.

[0020] In the figure: 1, welding gun body and gun head; 2, auxiliary positioning mechanism; 201, connecting rod; 202, connecting telescopic rod; 203, auxiliary spring; 204, return plate; 205, auxiliary head; 206, connecting plate; 207, push rod; 208, mounting plate; 209, connecting head; 210, hose; 3, linkage locking mechanism; 301, adjusting telescopic rod; 302, connecting shell; 303, push chamber; 304, push plate; 305, slide rod; 306, return spring; 307, clamping block; 308, movable clamping groove; 309, movable ball; 310, magnetic roller; 4, clamping mechanism; 401, gear; 402, sliding groove; 403, clamping rod; 404, force rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0022] Please refer to Figures 1 to 12 The application provides a technical solution: a low-error welding device for a ventilation pipe, which comprises a welding gun body and gun head 1, an auxiliary positioning mechanism 2 arranged on one side of the outer wall of the welding gun body and gun head 1 for assisting the guidance of the interface when welding the pipe, a linkage locking mechanism 3 arranged on both sides of the auxiliary positioning mechanism 2 for self-locking to ensure the smoothness of the welding point when encountering a non-planar or curved pipe interface, and a clamping mechanism 4 arranged on the top of the linkage locking mechanism 3 for adjustment and fixation. The auxiliary positioning mechanism 2 comprises a connecting rod 201 arranged on one side of the outer wall of the welding gun body and gun head 1, one end of the connecting rod 201 being provided with a connecting telescopic rod 202, one end of the connecting telescopic rod 202 being connected with a return plate 204, and the bottom of the outer wall of the return plate 204 being provided with an auxiliary head 205. The linkage locking mechanism 3 comprises an adjusting telescopic rod 301 movably installed on both sides of the connecting rod 201, one end of the adjusting telescopic rod 301 is connected with a connecting shell 302, the bottom of the outer wall of the connecting shell 302 is connected with a movable clamping groove 308, and the inner wall of the movable clamping groove 308 is movably provided with a movable ball 309.

[0023] As the embodiment, the auxiliary positioning mechanism 2 and the linkage locking mechanism 3 can make the welding process of the pipeline interface very fast, and can ensure the smoothness and accuracy of the welding interface. Due to the conical design of one end of the auxiliary head 205, the one end of the auxiliary head 205 can assist in positioning the welding gun body and the torch head 1 at the interface of the pipeline, so that the welding gun body and the torch head 1 can always keep synchronous welding with the interface during welding. The movable ball 309 and the magnetic roller 310 are arranged in the linkage locking mechanism 3, so that the magnetic roller 310 can move on the outer wall of the pipeline at any angle. Thus, the welding of the welding gun body and the torch head 1 can always keep stable, so that the welding process becomes simple and efficient, and has very high accuracy while maintaining efficiency, thereby reducing the welding error.

[0024] The outer wall of the connecting telescopic rod 202 is surrounded by an auxiliary spring 203, the outer wall of the reset plate 204 is provided with a connecting plate 206 on both sides, the outer wall of the connecting plate 206 is provided with a push rod 207, the bottom of one side of the outer wall of the welding gun body and the torch head 1 is provided with a mounting plate 208, the bottom of the outer wall of the mounting plate 208 is provided with a connecting head 209, one end of the connecting head 209 is connected with a hose 210.

[0025] As the embodiment, the auxiliary head 205 will first touch the protrusions, and the auxiliary head 205 will be lifted when it touches the protrusions, driving the connecting telescopic rod 202 and the auxiliary spring 203 to contract, and the connecting telescopic rod 202 and the auxiliary spring 203 will drive the reset plate 204 to move slightly upward when contracting, and the reset plate 204 will drive the connecting plate 206 to move synchronously when moving, and the connecting plate 206 will drive the push rod 207 to move when moving, and the push rod 207 will push the gas in the connecting head 209 and the inner wall of the hose 210 to the inner wall of the push warehouse 303, and the inner wall of the push warehouse 303 has liquid, and the liquid cannot be extruded, which makes the liquid drive the push plate 304 to move downward, and the push plate 304 will drive the slide rod 305 to move when moving downward, and one end of the slide rod 305 will drive the clamping block 307 to move, and the clamping block 307 will drive the movable ball 309 in the cavity of the movable clamping groove 308 to contact the inner wall thereof after moving, so that the movable ball 309 is limited by the friction force of the clamping block 307 and the movable ball 309 (the connecting head 209 is rigidly arranged, and the hose 210 has a certain adjustability, so that the push rod 207 can move without being blocked by the gas when the user adjusts the angle of the telescopic rod 301).

[0026] The inner wall of the connecting shell 302 is provided with the push warehouse 303, the inner wall of the push warehouse 303 is movably provided with the push plate 304, the bottom of the outer wall of the push plate 304 is connected with the slide rod 305, one end of the slide rod 305 is surrounded and mounted with the reset spring 306, one end of the slide rod 305 is connected with the clamping block 307, and the outer wall of the movable ball 309 is connected with the magnetic roller 310.

[0027] As the embodiment, the movable ball 309 is in a movable state, and when the movable ball 309 is in the movable state, it can cope with the case that the welding part of some special-shaped pipes is curved, because the auxiliary head 205 can move along any shaped gap, and the magnetic roller 310 can turn in any direction, so that accurate guidance can be realized when welding the curve (by using the magnetism between the magnetic roller 310 and the pipe, the magnetic roller 310 can roll along the outer wall of the pipe when the user welds, and the magnetic roller 310 can be adjusted at any angle, so as to ensure the flexibility and universality of the present application).

[0028] The locking mechanism 4 comprises a gear 401 movably connected with the other end of the telescopic rod 301, one side of the gear 401 is provided with a sliding groove 402, the inner wall of the sliding groove 402 is movably provided with a clamping rod 403, and the outer wall of the clamping rod 403 is provided with a force rod 404.

[0029] As for this embodiment, the user can hold the deployment telescopic rod 301 and rotate it, and there are two deployment telescopic rods 301 in total, so that the user can adjust it according to the surface of the pipe, and the two deployment telescopic rods 301 can be rotated to different angles, so that the magnetic rollers 310 can both be close to the outer wall of the pipe. Then the deployment telescopic rod 301 needs to be fixed. The user only needs to bend the force-bearing rod 404, and use the force-bearing rod 404 to drive the clamping rod 403 to slide on the inner wall of the slide groove 402, so that one end of the clamping rod 403 is stuck on the tooth groove of the gear 401, and then the gear 401 can be stuck. After the gear 401 is stuck, the deployment telescopic rod 301 can be fixed.

[0030] The auxiliary head 205 is cylindrical in a three-dimensional view, and one end of the auxiliary head 205 is conical.

[0031] As the present embodiment, one end of the auxiliary head 205 is stuck in the gap formed at the pipe welding place, and then the user can hold the welding gun body and the gun head 1 and move it to one side to weld. When welding, one end of the auxiliary head 205 will move along the gap of the pipe, so that the welding of the welding gun body and the gun head 1 can be guided. Because the welding edge of the pipe is cut, it may become uneven and have tiny protrusions due to the cutting. The auxiliary head 205 will first touch these protrusions. When the auxiliary head 205 touches the protrusions, it will be pushed up to drive the connecting telescopic rod 202 and the auxiliary spring 203 to contract. The connecting telescopic rod 202 and the auxiliary spring 203 will contract. When the auxiliary head 205 is in the correct position, it will drive the reset plate 204 to move slightly upwards (the conical design of the auxiliary head 205 allows the auxiliary head 205 to move along the gap of the pipe welding port, thereby guiding the welding process, thereby improving the welding efficiency, and the auxiliary head 205 can detect the uneven places in the pipe interface, and can adaptively drive the other mechanisms to adjust, thereby ensuring the flexibility of the equipment. Although the auxiliary head 205 is a little distance away from the specific muzzle, it may cause no guidance when welding the tail end, but the pipeline welding is generally long, and the lack of guidance for only the last small distance will not affect the overall weld).

[0032] One end of the hose 210 is connected to the inner wall of the pushing chamber 303, and the inner wall of the pushing chamber 303 is provided with a liquid As the embodiment, the inner wall of the pushing bin 303 is filled with liquid which cannot be squeezed, so that the liquid drives the pushing plate 304 to move downward, and the pushing plate 304 drives the sliding rod 305 to move when moving downward, and the one end of the sliding rod 305 drives the clamping block 307 to move, and the clamping block 307 provides the cavity of the movable clamping groove 308 to contact the movable ball 309 in the inner wall after moving, so that the movable ball 309 is limited by the friction between the clamping block 307 and the movable ball 309, so that the movable ball 309 cannot move, so that the magnetic roller 310 is in a fixed state, and the welding line does not deviate due to the protrusions on the inner wall of the pipeline, but can continue to weld according to the original route (the friction between the clamping block 307 and the movable ball 309 is generated by the property that the liquid cannot be squeezed, that is, the hydraulic principle, so that the movable ball 309 is limited by the clamping block 307, and the material of the clamping block 307 is rubber material, which can increase the friction of the movable ball 309).

[0033] The bottom of the outer wall of the pushing bin 303 is provided with a cavity, and the sliding rod 305 penetrates through the cavity of the pushing bin 303 and is connected with the clamping block 307.

[0034] As the embodiment, the clamping block 307 provides the cavity of the movable clamping groove 308 to contact the movable ball 309 in the inner wall after moving, so that the movable ball 309 is limited by the friction between the clamping block 307 and the movable ball 309, so that the movable ball 309 cannot move, so that the magnetic roller 310 is in a fixed state, and the welding line does not deviate due to the protrusions on the inner wall of the pipeline, but can continue to weld according to the original route.

[0035] The bottom of the outer wall of the clamping block 307 is semicircular, and the bottom of the outer wall of the clamping block 307 is matched with the outer wall of the movable ball 309.

[0036] As the embodiment, the sliding rod 305 drives the clamping block 307 to return to the original position when resetting, so that the movable ball 309 is in a movable state, and when the movable ball 309 is in a movable state, the welding of some special-shaped pipelines can be dealt with as curves, because the auxiliary head 205 can move along any-shaped gap, and the magnetic roller 310 can turn in any direction, so that accurate guidance can be realized when welding curves.

[0037] The top of the outer wall of the movable clamping groove 308 is provided with a cavity, and the diameter of the cavity of the movable clamping groove 308 is matched with the diameter of the clamping block 307.

[0038] As the embodiment, the connecting plate 206 moves to drive the push rod 207 to move, and the push rod 207 moves to push the gas in the inner wall of the connecting head 209 and the hose 210 to the inner wall of the push-pressing chamber 303, and the inner wall of the push-pressing chamber 303 has liquid, the liquid cannot be extruded, so that the liquid drives the push plate 304 to move downward, and the push plate 304 moves to drive the sliding rod 305 to move, and the sliding rod 305 moves to drive the clamping block 307 to move, and the clamping block 307 moves to make the cavity of the movable clamping groove 308 contact the movable ball 309 in the inner wall, so that the movable ball 309 is limited by the friction between the clamping block 307 and the movable ball 309.

[0039] The outer wall of the mounting plate 208 is provided with a cavity, and the push rod 207 penetrates the cavity of the mounting plate 208, and the diameter of the push rod 207 is matched with the diameter of the inner wall of the connecting head 209.

[0040] As the embodiment, the connecting plate 206 moves to drive the push rod 207 to move, and the push rod 207 moves to push the gas in the inner wall of the connecting head 209 and the hose 210 to the inner wall of the push-pressing chamber 303, and the inner wall of the push-pressing chamber 303 has liquid, the liquid cannot be extruded, so that the liquid drives the push plate 304 to move downward, and the push plate 304 moves to drive the sliding rod 305 to move, and the sliding rod 305 moves to drive the clamping block 307 to move, and the clamping block 307 moves to make the cavity of the movable clamping groove 308 contact the movable ball 309 in the inner wall, so that the movable ball 309 is limited by the friction between the clamping block 307 and the movable ball 309.

[0041] Working principle: when the ventilation pipe low-error welding device is used, first, the user holds the welding gun body and the gun head 1, then adjusts according to the shape of the plate to be welded, the user can hold the adjusting telescopic rod 301 to rotate, and the adjusting telescopic rod 301 is provided with two, so that the user can adjust according to the surface of the pipe, and the two adjusting telescopic rods 301 can be rotated to different angles, so that the magnetic roller 310 can be tightly attached to the outer wall of the pipe, then the adjusting telescopic rod 301 needs to be fixed, the user only needs to bend the stress rod 404, and drive the clamping rod 403 to slide in the inner wall of the sliding groove 402, so that one end of the clamping rod 403 is clamped in the gear slot of the gear 401, then the gear 401 can be clamped, and the adjusting telescopic rod 301 can be fixed after the gear 401 is clamped, and since one end of the magnetic roller 310 is connected with the movable ball 309, and the movable ball 309 is spherical and can move in the inner wall of the movable clamping groove 308, so that the user can use the magnetism between the magnetic roller 310 and the outer wall of the pipe to make the magnetic roller 310 roll along the outer wall of the pipe at any angle; Secondly, the user needs to put one end of the auxiliary head 205 into the gap formed by the pipe welding at the beginning of welding. Then the user can hold the welding gun body and the gun head 1 and move to one side for welding. When welding, one end of the auxiliary head 205 will move along the gap of the pipe. This can guide the welding of the welding gun body and the gun head 1. Because the welding edge of the pipe is cut, there may be small protrusions due to the unevenness of the cutting edge. The auxiliary head 205 will first touch these protrusions. When the auxiliary head 205 touches the protrusions, it will be lifted to drive the connecting extension rod 202 and the auxiliary spring 203 to contract. The connecting extension rod 202 and the auxiliary spring 203 will drive the reset plate 204 to move slightly upward when contracting. The reset plate 204 will drive the connecting plate 206 to move synchronously when moving. The connecting plate 206 will drive the push rod 207 to move when moving. The push rod 207 will push the gas in the connecting head 209 and the inner wall of the hose 210 to the inner wall of the push warehouse 303 when moving. The inner wall of the push warehouse 303 has liquid, which cannot be squeezed. This makes the liquid drive the push plate 304 to move downward. The push plate 304 will drive the slide rod 305 to move when moving downward. One end of the slide rod 305 will drive the clamping block 307 to move when moving. The clamping block 307 will provide the cavity of the movable clamping groove 308 to contact the movable ball 309 in its inner wall after moving. This will limit the movable ball 309 through the friction between the clamping block 307 and the movable ball 309, so that the movable ball 309 cannot move. This makes the magnetic roller 310 in a fixed state and does not deviate from the welding line due to the protrusions on the inner wall of the pipe, but can continue to weld according to the original route. Finally, when the auxiliary head 205 is separated from the pipe protrusions, the auxiliary head 205 will be reset through the reset of the connecting extension rod 202 and the auxiliary spring 203. This resets the reset plate 204, so that the connecting plate 206 and the push rod 207 are reset. Because there is no pushing force of the push rod 207, the reset spring 306 at one end of the slide rod 305 will drive the slide rod 305 to reset. The slide rod 305 will drive the clamping block 307 to return to the original position when resetting, so that the movable ball 309 is in a movable state. When the movable ball 309 is in a movable state, it can cope with the curve situation of some special-shaped pipe welding. Because the auxiliary head 205 can move along any shaped gap, and the magnetic roller 310 can turn in any direction, the welding curve can also be accurately guided.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-error welding device for ventilation ducts, comprising a welding gun body and a gun head (1), characterized in that: It also includes an auxiliary positioning mechanism (2) provided on one side of the outer wall of the welding gun body and the gun head (1) for assisting in guiding the interface when welding the pipe, a linkage locking mechanism (3) provided on both sides of the auxiliary positioning mechanism (2) for self-locking when encountering an uneven surface or curve at the pipe interface to ensure a smooth weld, and a locking mechanism (4) provided on the top of the linkage locking mechanism (3) for adjusting and fixing. The auxiliary positioning mechanism (2) comprises a connecting rod (201) provided on one side of the outer wall of the welding gun body and the gun head (1); one end of the connecting rod (201) is provided with a connecting telescopic rod (202); one end of the connecting telescopic rod (202) is connected to a reset plate (204); and an auxiliary head (205) is provided at the bottom of the outer wall of the reset plate (204); The linkage locking mechanism (3) comprises a deployment telescopic rod (301) movably mounted on both sides of the connecting rod (201), one end of the deployment telescopic rod (301) is connected to a connecting shell (302), the bottom of the outer wall of the connecting shell (302) is connected to a movable slot (308), and the inner wall of the movable slot (308) is movably provided with a movable ball (309).

2. A low-error welding device for ventilation ducts according to claim 1, characterized in that: An auxiliary spring (203) is installed around the outer wall of the connecting telescopic rod (202), connecting plates (206) are provided on both sides of the outer wall of the reset plate (204), and a push rod (207) is provided on the outer wall of the connecting plate (206). A mounting plate (208) is provided at the bottom of one side of the outer wall of the welding gun body and the gun head (1), and a connecting head (209) is provided at the bottom of the outer wall of the mounting plate (208), and one end of the connecting head (209) is connected to a hose (210).

3. The low-error welding device for ventilation ducts according to claim 1, characterized in that: The inner wall of the connecting shell (302) is provided with a pushing chamber (303), the inner wall of the pushing chamber (303) is movably provided with a pushing plate (304), the bottom of the outer wall of the pushing plate (304) is connected to a sliding rod (305), one end of the sliding rod (305) is surrounded by a return spring (306), one end of the sliding rod (305) is connected to a clamping block (307), and the outer wall of the movable ball (309) is connected to a magnetic roller (310).

4. The low-error welding device for ventilation ducts according to claim 1, characterized in that: The locking mechanism (4) comprises a gear (401) movably connected to the other end of the deployment telescopic rod (301), a slide groove (402) is provided on one side of the gear (401), a locking rod (403) is movably provided on the inner wall of the slide groove (402), and a force-bearing rod (404) is provided on the outer wall of the locking rod (403).

5. The low-error welding device for ventilation ducts according to claim 1, characterized in that: The auxiliary head (205) is cylindrical in a three-dimensional view, and one end of the auxiliary head (205) is conical.

6. The low-error welding device for ventilation ducts according to claim 2, characterized in that: One end of the hose (210) is connected to the inner wall of the pushing chamber (303), and the inner wall of the pushing chamber (303) is provided with liquid.

7. The low-error welding device for ventilation ducts according to claim 3, characterized in that: A cavity is provided at the bottom of the outer wall of the pushing bin (303), and the sliding rod (305) passes through the cavity of the pushing bin (303) and is connected to the clamping block (307).

8. The low-error welding device for ventilation ducts according to claim 3, characterized in that: The bottom of the outer wall of the clamping block (307) is semicircular, and the bottom of the outer wall of the clamping block (307) is adapted to the outer wall of the movable ball (309).

9. The low-error welding device for ventilation ducts according to claim 3, characterized in that: A cavity is provided at the top of the outer wall of the movable clamping slot (308), and the diameter of the cavity of the movable clamping slot (308) is adapted to the diameter of the clamping block (307).

10. The low-error welding device for ventilation ducts according to claim 2, characterized in that: The outer wall of the mounting plate (208) is provided with a cavity, and the push rod (207) passes through the cavity of the mounting plate (208). The diameter of the push rod (207) is adapted to the diameter of the inner wall of the connector (209).

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