Concentric welding tool based on special toxic gas conveying pipeline and welding method of concentric welding tool

Abstract

The invention discloses a concentric welding tool based on a special poisonous gas conveying pipeline and a welding method of the concentric welding tool, relates to the technical field of special poisonous gas conveying, and solves the technical problems of inconvenience in tool moving and fixing, inaccuracy in pipeline clamping and butt joint and difficulty in supporting and continuous welding in current special poisonous gas conveying pipeline welding. A fixing mechanism is arranged at the top end of the moving mechanism, and a supporting mechanism is arranged in the center of the top end of the fixing mechanism. The concentric welding tool and method have the advantages that the tool can be conveniently moved by the moving mechanism through the pushing handle and the rolling wheels, and the braking component can be stably locked; the fixing mechanism can accurately clamp pipelines of different specifications and achieve accurate butt joint, and the butt joint accuracy is ensured through multiple adjusting modes. The supporting mechanism can flexibly adjust the height to support the pipeline by means of a servo motor and a unique structure, the pipeline can slide conveniently through the rolling ball design, and continuous and efficient welding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a concentric welding tool and a welding method thereof for a special toxic gas transmission pipeline. Background Art

[0002] In the field of special toxic gas transportation, the welding quality of pipelines is extremely important. At present, there are many problems with the traditional welding method of toxic gas transportation pipelines. On the one hand, the welding tooling is inconvenient to move and lacks a flexible moving mechanism, making it difficult to quickly and conveniently transport the tooling to the designated welding position. Even if it reaches the position, there is no reliable fixing device, and the tooling is prone to displacement during the welding process, which seriously affects the welding accuracy and quality; On the other hand, the clamping and docking of the pipes are not accurate enough. The existing clamping devices cannot adapt to pipes of different specifications, and it is difficult to ensure that the two pipes are accurately docked on the same axis, resulting in poor concentricity of the pipes after welding, which not only affects the gas transmission efficiency, but also may cause pipeline leakage due to uneven stress, increasing safety risks; In addition, the welding process lacks an effective support and continuous welding mechanism. When welding the pipeline, the bottom lacks a support structure that can flexibly adjust the height and support angle, which is not conducive to welding operations at different positions. At the same time, it is difficult to achieve continuous welding. After each welding, it is complicated and cumbersome to readjust the position of the pipeline, which greatly reduces the welding efficiency and increases the time and risk of exposure to toxic gases. Therefore, there is an urgent need for a new concentric welding tool and method based on special toxic gas transmission pipelines to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a concentric welding tool and a welding method for a special toxic gas transmission pipeline to solve the following technical problems: Currently, the welding of special toxic gas transmission pipelines has problems such as inconvenient movement and fixation of tooling, inaccurate pipeline clamping and docking, and difficulty in supporting and continuous welding.

[0004] The object of the present invention can be achieved by the following technical scheme: based on a concentric welding tool for a special toxic gas transmission pipeline, it includes a moving mechanism, a fixing mechanism is arranged at the top of the moving mechanism, and a supporting mechanism is arranged at the center of the top of the fixing mechanism; The fixing mechanism includes a slot plate, a fixing seat is fixedly connected to the inner center of the top end of the slot plate, a light rod 1 is fixedly connected to the front and rear ends of the side faces of the fixing seat, a screw rod 1 is rotatably connected to the center of the side face of the fixing seat, a hand wheel 1 is fixedly connected to the outer sides of the two screw rods 1, a slider is threadedly connected to the outer wall of the screw rod 1, a clamping member is provided at the top of the two sliders, the inner front and rear ends of the two sliders are sleeved on the outer wall of the light rod 1, the inner sides of the two hand wheels 1 are rotatably connected to the center of the side face of the slot plate, and the outer side of the light rod 1 is fixedly connected to the inner wall of the slot plate.

[0005] The top end of the fixing member is fixedly provided with a toothed connecting strip which is cooperatively connected with the toothed connecting strip, and the toothed connecting strip is connected with the toothed connecting strip on the bottom end of the fixing member.

[0006] As a further solution of the present invention, a slide groove is provided at the front end top and the rear end top of the frame, and the limiting slide rod is slidably connected inside the slide groove.

[0007] As a further solution of the present invention, the moving mechanism includes a shell, a push handle is fixedly connected to the top end of the side of the shell, a base is fixedly connected to the top end of the inner top of the shell, a fixed plate is fixedly connected to the top end of the base, a plurality of support blocks are evenly fixedly connected to the inner bottom end of the shell, the inner sides of the plurality of support blocks are rotatably connected to rollers through a connecting shaft, a braking component is provided at the middle section of the outer wall of the connecting shaft of the roller located on one side of the inner bottom end of the shell, and a groove plate is fixedly connected to the top end of the fixed plate.

[0008] As a further solution of the present invention, the brake component includes a base plate, a groove seat is fixedly connected to one side of the top of the base plate, a rotating adapter is rotatably connected to the other side of the top of the base plate, a connecting rod is rotatably connected to the inner side of the top of the rotating adapter through a pin shaft, a pressure block is fixedly connected to the outer wall of the connecting rod at the top of the groove seat, a pedal is fixedly connected to the end of the connecting rod, a fixed adapter is fixedly connected to the middle section of the outer wall of the connecting rod, a supporting spring is rotatably connected to the inner side of the bottom end of the fixed adapter, and the top of the outer wall of the connecting rod is close to the pedal. A card rod is rotatably connected to the position, a card frame is provided on the outside of the card rod, a return spring is fixedly connected to the front end of the top of the outer wall of the card rod, the bottom plate is fixedly connected to one side of the inner bottom end of the shell, the top of the groove seat is attached to the bottom of the middle section of the outer wall of the roller at the coupling shaft, the bottom end of the pressure block is clamped to the top of the middle section of the outer wall of the roller at the coupling shaft, the bottom end of the return spring is fixedly connected to the inner bottom end of the shell, the side of the card frame is fixedly connected to the side of the shell, the back of the card rod is clamped together with the card frame, and the front end side of the return spring is fixedly connected to the side of the shell.

[0009] As a further solution of the present invention, a cavity is opened on the side of the shell, and the outer wall side of the connecting rod is slidably connected to the inside of the cavity.

[0010] As a further scheme of the present invention, the supporting mechanism includes an axle seat, wherein the inner side of the axle seat on one side is rotatably connected to a forward and reverse screw, and the inner side of the axle seat on the other side is fixedly connected to a support rod, the outer wall center of the forward and reverse screw and the outer wall center of the support rod are both rotatably connected to the support seat, the outer wall of the forward and reverse screw is threadedly connected to a sleeve rod, and the other side of the sleeve rod is sleeved on the outer wall of the support rod, the front end of the axle seat on one side is threadedly connected to a servo motor through a flange, the top ends of the outer walls of the two support rods are rotatably connected to cross struts, the top ends of the two cross struts are rotatably connected to sliding adapters, the top ends of the multiple sliding adapters are slidably connected to a top plate, the top end of the top plate is fixedly connected to a support plate, the top end of the support plate is evenly rotatably connected to a plurality of rolling balls, the axle seat is fixedly connected to the top end of the fixed seat, and the output shaft of the servo motor is fixedly connected to the front end of the forward and reverse screws.

[0011] As a further solution of the present invention, a plurality of slideways are provided at the bottom end of the top plate, and the top end of the sliding adapter is slidably connected to the inside of the slideway.

[0012] The present invention also provides a concentric welding method based on a special toxic gas delivery pipeline, comprising the following steps: Step 1: When concentrically welding the special toxic gas delivery pipeline, first push the welding tool to the position where the pipeline needs to be welded through the moving mechanism, lock the roller on one side through the work of the braking component, so as to fix the moving mechanism, and then perform subsequent welding processing on the special toxic gas delivery pipeline; Step 2: Clamp the special toxic gas delivery pipelines to be welded together into the inside of the clamping components in the fixing mechanism. Through the cooperation of the fixing mechanism, the distance between the two clamping components can be adjusted to facilitate the docking of the pipelines. Through the work of the clamping components, pipelines of different specifications can be clamped and fixed, and after the pipelines are clamped, the horizontal position of the pipelines can be adjusted to make the pipeline docking more accurate. Step 3: Connect two different pipes together, clamp and fix them, then prop up the support mechanism to support the bottom end of the connected pipes. At this time, use welding tools to weld the joints of the pipes. After welding, loosen the clamping components slightly, push the welded pipe to one side, and then re-clamp the other section of the pipe to the inside of one of the clamping components, so that the special toxic gas transmission pipeline can be continuously welded.

[0013] Beneficial effects of the present invention: (1) Convenient movement and stable fixation: The moving mechanism is equipped with a pusher and rollers to facilitate pushing the welding tooling to the specified position. At the same time, the brake component can lock the rollers to keep the tooling stable during welding, avoiding affecting the welding quality due to position movement; The brake component is cleverly designed. The locking is achieved by stepping on the pedal to drive the pressure block to press the roller coupling. The unlocking is achieved by pulling the lever and resetting with the help of the supporting spring. The operation is simple and convenient. (2) Precise docking and clamping: The fixing mechanism can clamp and fix toxic gas pipelines of different specifications and dock them accurately. The hand wheel drives the screw rod to adjust the position of the slider, thereby adjusting the distance between the two clamping components, making it easy to dock the pipelines. The clamping component is designed to be flexible. The position of the lower bracket can be adjusted by shaking the second hand wheel to drive the second screw rod, and the position of the upper clamp block can be adjusted by shaking the rocker to drive the threaded rod, so as to adjust the horizontal position of the pipeline, ensure accurate docking and welding accuracy; (3) Efficient support and continuous welding: The support mechanism drives the forward and reverse screws to rotate through the servo motor, so that the sleeve rod moves, and then the support height of the cross brace is adjusted, and the top of the support plate is attached to the bottom of the pipeline, which plays a supporting role for the pipeline; The rolling ball on the support plate allows the pipe to slide freely on its top, which facilitates the continuous welding process of special toxic gas transmission pipes and effectively improves welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the connection structure of the concentric welding tool for the special toxic gas transmission pipeline according to the present invention; Figure 2 The present invention Figure 1A schematic diagram of a connection structure viewed from above; Figure 3 The present invention Figure 1 A schematic diagram of the cross-sectional connection structure of the moving mechanism; Figure 4 The present invention Figure 3 Another isometric connection structure schematic diagram; Figure 5 The present invention Figure 3 Schematic diagram of the connection structure of the brake component; Figure 6 The present invention Figure 1 A schematic diagram of the connection structure between the fixing mechanism and the supporting mechanism; Figure 7 The present invention Figure 6 Schematic diagram of the local connection structure of the fixing mechanism; Figure 8 The present invention Figure 6 A schematic diagram of the connection structure of the clamping member; Fig. 9 The present invention Figure 6 Schematic diagram of the connection structure of the middle support mechanism; Fig.10 The present invention Fig. 9 Schematic diagram of the upward connection structure.

[0015] In the figure: 1. moving mechanism; 101. housing; 102. push handle; 103. base; 104. fixing plate; 105. support block; 106. roller; 107. braking member; 1071. bottom plate; 1072. slot seat; 1073. rotating adapter; 1074. connecting rod; 1075. pressing block; 1076. pedal; 1077. fixed adapter; 1078. supporting spring; 1079. clamping rod; 10710. clamping frame; 10711. reset spring; 2. fixing mechanism; 201. slot plate; 202. fixing seat; 203. light rod 1; 204. screw rod 1; 205. hand wheel 1; 206. slider; 207. clamping member; 2071, fixed frame; 2072, lead screw 2; 2073, hand wheel 2; 2074, bare rod 2; 2075, lower bracket; 2076, sleeve; 2077, frame; 2078, lower clamp; 2079, upper bracket; 20710, threaded rod; 20711, threaded tube; 20712, rocker; 20713, upper clamp; 20714, limit slide; 3, support mechanism; 301, shaft seat; 302, forward and reverse lead screw; 303, support rod; 304, support seat; 305, sleeve rod; 306, servo motor; 307, cross brace; 308, sliding adapter; 309, top plate; 310, support plate; 311, ball. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figure 1-Figure 5 As shown, the present invention is a concentric welding tool for a special toxic gas transmission pipeline, comprising a moving mechanism 1, the moving mechanism 1 is used to drive a fixing mechanism 2 to move, a fixing mechanism 2 is arranged at the top of the moving mechanism 1, the fixing mechanism 2 is used to clamp and fix the toxic gas pipeline to be welded together, and can accurately butt the two sections of the pipeline together, so as to facilitate welding, a supporting mechanism 3 is arranged at the center of the top of the fixing mechanism 2, the supporting mechanism 3 is used to support the bottom end of the pipeline, and the pipeline supported at its top can slide in any direction, so as to facilitate continuous welding of the pipeline; The moving mechanism 1 includes a housing 101, a push handle 102 is fixedly connected to the top of the side of the housing 101, and the push handle 102 is used to push the housing 101 to move. The top of the inner part of the housing 101 is fixedly connected to a base 103, and the base 103 is used to fix a fixing plate 104. The top of the base 103 is fixedly connected to a fixing plate 104, and the fixing plate 104 is used to fix the slot plate 201 in the fixing mechanism 2. The inner bottom of the housing 101 is evenly fixed with a plurality of support blocks 105, and the support blocks 105 are fixedly connected to the inner bottom of the housing 101. 05 is used to support the roller 106. The inner sides of the multiple support blocks 105 are rotatably connected with the roller 106 through a coupling. The roller 106 is used to drive the shell 101 to move. A brake component 107 is provided in the middle section of the outer wall of the coupling of the roller 106 located on the bottom end of the shell 101. The brake component 107 is used to lock the roller 106 on the inner side of the shell 101, thereby fixing the moving mechanism 1 as a whole. The top of the fixed plate 104 is fixedly connected with a slot plate 201.

[0018] In this embodiment, preferably, the brake member 107 includes a bottom plate 1071, the bottom plate 1071 is used to fix the groove seat 1072, the top side of the bottom plate 1071 is fixedly connected with the groove seat 1072, the groove seat 1072 is used to support the bottom end of the outer wall of the roller 106 at the shaft, the other side of the top of the bottom plate 1071 is rotatably connected with a rotating adapter 1073, the rotating adapter 1073 is used to support the connection, the top inner side of the rotating adapter 1073 is rotatably connected with a connecting rod 1074 through a pin shaft, and the connecting rod 1074 is used to press the block The connecting rod 1074 is supported by a fixing adapter 1075 and a fixing adapter 1077. The outer wall of the connecting rod 1074 is fixedly connected with a pressing block 1075 at the top of the groove seat 1072. The pressing block 1075 is used to press the top of the outer wall of the roller 106. The end of the connecting rod 1074 is fixedly connected with a pedal 1076. The pedal 1076 is used to drive the connecting rod 1074 to move. The middle section of the outer wall of the connecting rod 1074 is fixedly connected with a fixing adapter 1077. The fixing adapter 1077 is used to support the top of the support spring 1078. The fixing adapter 1077 The inner side of the bottom end is rotatably connected with a support spring 1078, and the support spring 1078 is used to reset the connecting rod 1074. The top of the outer wall of the connecting rod 1074 is rotatably connected with a clamping rod 1079 near the pedal 1076. The clamping rod 1079 is used to clamp the position of the connecting rod 1074. A clamping frame 10710 is provided on the outer side of the clamping rod 1079. The clamping frame 10710 is used to clamp the back of the pull rod. The front end of the top of the outer wall of the clamping rod 1079 is fixedly connected with a reset spring 10711. The reset spring 10711 is used to reset the connecting rod 1074. 74 is reset, the bottom plate 1071 is fixedly connected to one side of the inner bottom end of the shell 101, the top end of the groove seat 1072 is fitted to the bottom of the middle section of the outer wall of the coupling of the roller 106, the bottom end of the pressure block 1075 is clamped on the top of the middle section of the outer wall of the coupling of the roller 106, the bottom end of the reset spring 10711 is fixedly connected to the inner bottom end of the shell 101, the side of the clamping frame 10710 is fixedly connected to the side of the shell 101, the back of the clamping rod 1079 is clamped together with the clamping frame 10710, and the front end side of the reset spring 10711 is fixedly connected to the side of the shell 101.

[0019] In this embodiment, preferably, a cavity is opened on the side of the shell 101, and the outer wall side of the connecting rod 1074 is slidably connected to the inside of the cavity.

[0020] In summary, when it is necessary to perform concentric welding processing on the special toxic gas transmission pipeline, the fixing mechanism 2 must first be moved to the place where it is needed through the moving mechanism 1. After the moving mechanism 1 is moved to the specified position, the pedal 1076 is stepped on. When the pedal 1076 moves downward, it can drive the connecting rod 1074 to rotate with the rotating adapter 1073 as the axis, so that the pressing block 1075 can be driven downward by the connecting rod 1074, so that the pressing block 1075 can press the top of the outer wall of the connecting shaft of the roller 106, so that the roller 106 can be locked. When it is necessary to cancel the locking of the roller 106 so that the moving mechanism 1 can move again, the user pulls the clamping rod 1079 to the front end. When the clamping rod 1079 is shaken forward, the clamping rod 1079 can cancel the clamping connection with the clamping frame 10710. Through the work of the support spring 1078, the connecting rod 1074 can be lifted up again, so that the roller 106 can rotate again.

[0021] Example 2: Please refer to Figure 1 and Figure 6-Figure 8 As shown, the fixing mechanism 2 includes a slot plate 201, the slot plate 201 is used to fix the fixing seat 202, the fixing seat 202 is fixedly connected at the inner center of the top of the slot plate 201, the fixing seat 202 is used to support the supporting mechanism 3, the front end and the rear end of the side of the fixing seat 202 are fixedly connected with a light rod 203, the light rod 203 is used to limit the movement trajectory of the slider 206, the side center of the fixing seat 202 is rotatably connected with a screw rod 204, the screw rod 204 is used to drive the slider 206 to move, and the outer sides of the two screw rods 204 are fixedly connected with a hand wheel 205, the hand wheel 205 205 is used to drive the screw rod 204 to rotate. The outer wall of the screw rod 204 is threadedly connected with a slider 206. The slider 206 is used to drive the clamping member 207 to move. The top of the two sliders 206 is provided with a clamping member 207. The clamping member 207 is used to clamp and fix the special toxic gas delivery pipeline to be welded. The inner front and rear ends of the two sliders 206 are both sleeved on the outer wall of the light rod 203. The inner sides of the two hand wheels 205 are rotatably connected to the side center of the slot plate 201, and the outer side of the light rod 203 is fixedly connected to the inner wall of the slot plate 201.

[0022] In this embodiment, preferably, the clamping member 207 includes a fixing frame 2071, the inner top end of the fixing frame 2071 is rotatably connected to a screw rod 2072, the screw rod 2072 is used to drive the lower bracket 2075 to move, the front end of the screw rod 2072 is fixedly connected to a hand wheel 2073, the hand wheel 2073 is used to drive the screw rod 2072 to rotate, the inner bottom end of the fixing frame 2071 is fixedly connected to a light rod 2074, the light rod 2074 is used to limit the motion trajectory of the lower bracket 2075, the outer wall of the screw rod 2072 is threadedly connected to the lower bracket 2075, and the lower bracket 2075 is used to move the sleeve 20 76 and frame 2077 are fixed, the bottom end of the lower bracket 2075 is fixedly connected with a sleeve 2076, and the sleeve 2076 can slide on the outer wall of the light rod 2074, and the top inner side of the lower bracket 2075 is fixedly connected with a frame 2077, and the frame 2077 is used to fix the lower clamping block 2078, and the inner bottom end of the frame 2077 is fixedly connected with a lower clamping block 2078, and the lower clamping block 2078 can clamp and fix the special toxic gas delivery pipeline placed on the top of the lower clamping block 2078 through the mutual cooperation between the lower clamping block 20713, and the outer wall top of the frame 2077 is fixedly connected with an upper bracket 2079, and the upper bracket 2079 is fixedly connected with the upper bracket 2079. 79 is used to support the threaded rod 20710 so that the threaded rod 20710 can rotate inside the upper bracket 2079. The threaded rod 20710 is rotatably connected to the inner center of the upper bracket 2079. The threaded rod 20710 is used to drive the threaded tube 20711 to move up and down. The bottom end of the outer wall of the threaded rod 20710 is threadedly connected to the threaded tube 20711. The threaded tube 20711 is used to drive the upper clamping block 20713 to move. The top end of the outer wall of the threaded rod 20710 is fixedly connected to a rocker 20712. The rocker 20712 is used to drive the threaded rod 20710 to rotate. The bottom end of the threaded tube 20711 is fixedly connected to the outer wall of the threaded rod 20710. An upper clamping block 20713 is connected, and the upper clamping block 20713 can clamp the toxic gas delivery pipeline by cooperating with the lower clamping block 2078. The front surface and the back of the upper clamping block 20713 are fixedly connected to the limiting slide bar 20714. The limiting slide bar 20714 is used to limit the movement trajectory of the upper clamping block 20713. The fixed frame 2071 is fixedly connected to the top of the slider 206. The fixed frame 2071 is used to support the screw rod 2072 and the light rod 2074. The back of the hand wheel 2073 is rotatably connected to the top of the front surface of the fixed frame 2071, and the sleeve 2076 is sleeved on the outer wall of the light rod 2074.

[0023] In this embodiment, preferably, a slide groove is provided at the front end top and the rear end top of the frame 2077, and the limiting slide rod 20714 is slidably connected inside the slide groove.

[0024] In summary, when it is necessary to weld the special toxic gas delivery pipeline, the two delivery pipelines that need to be welded together are clamped and fixed to the inside of the clamping member 207 respectively, and the delivery pipeline is placed on the top of the lower clamping block 2078 first, and then the rocker 20712 is shaken to drive the threaded rod 20710 to rotate at the same time. When the threaded rod 20710 rotates, the threaded tube 20711 threadedly connected to the bottom end of its outer wall can be driven to slide downward, thereby driving the upper clamping block 20713 to slide downward through the threaded tube 20711, so that the bottom end of the upper clamping block 20713 is pressed to the top of the delivery pipeline, and the delivery pipeline can be clamped and fixed through the cooperation of the upper clamping block 20713 and the lower clamping block 2078. After fixing the conveying pipeline, shake hand wheel 205 to drive screw rod 204 to rotate, which can drive screw rod 204 to rotate at the same time. During the rotation of screw rod 204, the position of slider 206 can be adjusted, so that the clamping member 207 located at the top of the two sliders 206 can be connected together. When the connected conveying pipelines are not kept on the same axis, by shaking hand wheel 2073, screw rod 2072 can be driven to rotate, so as to adjust the position of lower bracket 2075, so as to facilitate the connection of the two conveying pipelines together, thereby facilitating the subsequent welding thereof, and enabling the two connected conveying pipelines to be kept on the same axis, thereby ensuring welding accuracy.

[0025] Example 3: Please refer to Figure 1 and Figure 9-10As shown, the support mechanism 3 includes a shaft seat 301, wherein the inner side of one side of the shaft seat 301 is rotatably connected with a forward and reverse screw 302, and the forward and reverse screw 302 is used to drive the sleeve rod 305 to move. Since the outer wall of the forward and reverse screw 302 is provided with completely opposite thread grooves, when the forward and reverse screw 302 rotates, it can drive the two sleeve rods 305 threadedly connected to its outer wall to move in opposite directions at the same time. The inner side of the shaft seat 301 on the other side is fixedly connected with a support rod 303, and the support rod 303 is used to limit the movement trajectory of the sleeve rod 305 so that the sleeve rod 305 can maintain horizontal movement. The center of the outer wall of 302 and the center of the outer wall of the support rod 303 are both rotatably connected with a support seat 304, and the support seat 304 is used to support the center of the forward and reverse screws 302 and the support rod 303. The outer wall of the forward and reverse screws 302 is threadedly connected with a sleeve rod 305, and the sleeve rod 305 is used to support the bottom end of the cross brace 307, and the other side of the sleeve rod 305 is sleeved on the outer wall of the support rod 303, and the other side of the sleeve rod 305 can slide on the outer wall of the support rod 303. The front end of the shaft seat 301 on one side is threadedly connected to a servo motor 306 through a flange. The servo motor The machine 306 is used to drive the forward and reverse screws 302 to rotate. The top ends of the outer walls of the two support rods 303 are rotatably connected to the cross support rods 307. The cross support rods 307 are used to support the support plate 310. The top ends of the two cross support rods 307 are rotatably connected to the sliding adapters 308. The sliding adapters 308 are used to connect the top ends of the cross support rods 307 to the bottom ends of the top plates 309. The top ends of the multiple sliding adapters 308 are slidably connected to the top plates 309. The top plates 309 are used to fix the support plates 310. The top ends of the top plates 309 are fixedly connected to the support plates 310. The support plate 310 is used to support the ball 311 so that the ball 311 can rotate freely inside the top of the support plate 310. A plurality of balls 311 are connected to the top of the support plate 310 so that they rotate evenly. The ball 311 is used to support the bottom end of the conveying pipe to be welded together and can make the conveying pipe slide freely on its top. The shaft seat 301 is fixedly connected to the top of the fixed seat 202. The shaft seat 301 is used to support the forward and reverse screws 302 and the support rod 303. The output shaft of the servo motor 306 is fixedly connected to the front end of the forward and reverse screws 302.

[0026] In this embodiment, preferably, a plurality of slideways are provided at the bottom end of the top plate 309, and the top end of the sliding adapter 308 is slidably connected to the inside of the slideways.

[0027] In summary, after the special toxic gas delivery pipeline is clamped and fixed by the fixing mechanism 2 and docked to the same axis, the servo motor 306 in the support mechanism 3 can drive the forward and reverse screws 302 to rotate. Since the outer walls of the forward and reverse screws 302 are processed with completely opposite thread grooves, when the forward and reverse screws 302 rotate, the two sleeve rods 305 threadedly connected to their outer walls can move in corresponding directions at the same time. When the sleeve rods 305 move, the bottom ends of the cross struts 307 can be retracted inwardly. When the bottom ends of the cross struts 307 are retracted inwardly, the top ends of the cross struts 307 are also retracted inwardly, and the cross struts 307 can be propped up, so that the support height of the top plate 309 can be adjusted, so that the top end of the support plate 310 can fit to the bottom end of the pipeline, support the delivery pipeline, and enable the delivery pipeline to slide arbitrarily on the top end of the support plate 310, which is convenient for continuous welding of the special toxic gas delivery pipe and improves welding efficiency.

[0028] Example 4: Please refer to Figure 1-Figure 10 As shown, the embodiment 1, the embodiment 2 and the embodiment 3 are combined to obtain the present embodiment, which is based on the concentric welding method of the special toxic gas delivery pipeline, comprising the following steps: Step 1: When concentrically welding the special toxic gas delivery pipeline, the welding tool is first pushed to the position where the pipeline needs to be welded through the mobile mechanism 1, and the roller 106 on one side is locked by the operation of the brake member 107, so that the mobile mechanism 1 is fixed, and the special toxic gas delivery pipeline can be subsequently welded; Step 2: Clamp the special toxic gas delivery pipelines to be welded together into the inside of the clamping members 207 in the fixing mechanism 2 respectively. Through the cooperation of the fixing mechanism 2, the distance between the two clamping members 207 can be adjusted to facilitate the docking of the pipelines. Through the work of the clamping members 207, pipelines of different specifications can be clamped and fixed, and after the pipelines are clamped, the horizontal position of the pipelines can be adjusted to make the pipeline docking more accurate. Step three, connect two different pipes together, clamp and fix them, then prop up the support mechanism 3 to support the bottom ends of the connected pipes. At this time, use welding tools to weld the joints of the pipes. After welding, loosen the clamping member 207 slightly, push the welded pipe to one side, and then re-clamp the other section of the pipe to the inner side of one of the clamping members 207, so that the special toxic gas transmission pipeline can be continuously welded.

[0029] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of application of the present invention.

Claims

1. Based on the concentric welding tool for special toxic gas transmission pipeline, it is characterized by: It comprises a moving mechanism, a fixing mechanism is arranged at the top of the moving mechanism, and a supporting mechanism is arranged at the center of the top of the fixing mechanism; The fixing mechanism includes a slot plate, a fixing seat is fixedly connected to the inner center of the top end of the slot plate, a light rod 1 is fixedly connected to the front and rear ends of the side faces of the fixing seat, a screw rod 1 is rotatably connected to the center of the side face of the fixing seat, a hand wheel 1 is fixedly connected to the outer sides of the two screw rods 1, a slider is threadedly connected to the outer wall of the screw rod 1, a clamping member is provided at the top of the two sliders, the inner front and rear ends of the two sliders are sleeved on the outer wall of the light rod 1, the inner sides of the two hand wheels 1 are rotatably connected to the center of the side face of the slot plate, and the outer side of the light rod 1 is fixedly connected to the inner wall of the slot plate.

2. The concentric welding tool for special toxic gas transmission pipeline according to claim 1 is characterized in that: The top end of the fixing member is fixedly provided with a screw rod, and the front end of the screw rod is fixedly provided with a hand wheel, and the inner bottom end of the fixing member is fixedly provided with a light rod, and the outer wall of the screw rod is fixedly provided with a lower bracket, and the lower end of the fixing member is fixedly provided with a sleeve.

3. The concentric welding tool for special toxic gas pipeline according to claim 2 is characterized in that: The front end top and the rear end top of the frame are both provided with sliding grooves, and the limiting sliding rod is slidably connected inside the sliding grooves.

4. The concentric welding tool for special toxic gas pipeline according to claim 1 is characterized in that: The moving mechanism includes a shell, a push handle is fixedly connected to the top end of the side of the shell, a base is fixedly connected to the top end of the inner top of the shell, a fixed plate is fixedly connected to the top end of the base, a plurality of support blocks are evenly fixedly connected to the inner bottom end of the shell, the inner sides of the plurality of support blocks are rotatably connected to rollers through a connecting shaft, a braking component is provided in the middle section of the outer wall of the connecting shaft of the roller located on one side of the inner bottom end of the shell, and a groove plate is fixedly connected to the top end of the fixed plate.

5. The concentric welding tool for special toxic gas pipeline according to claim 4 is characterized in that: The brake component includes a base plate, a groove seat is fixedly connected to one side of the top of the base plate, a rotating adapter is rotatably connected to the other side of the top of the base plate, a connecting rod is rotatably connected to the inner side of the top of the rotating adapter through a pin shaft, a pressure block is fixedly connected to the outer wall of the connecting rod at the top of the groove seat, a pedal is fixedly connected to the end of the connecting rod, a fixed adapter is fixedly connected to the middle section of the outer wall of the connecting rod, a supporting spring is rotatably connected to the inner side of the bottom end of the fixed adapter, and the outer wall of the connecting rod is rotatably connected to the top of the pedal There is a clamping rod, a clamping frame is arranged on the outside of the clamping rod, a reset spring is fixedly connected to the front end of the top of the outer wall of the clamping rod, the bottom plate is fixedly connected to one side of the inner bottom end of the shell, the top end of the groove seat is fitted to the bottom of the middle section of the outer wall of the roller at the coupling shaft, the bottom end of the pressure block is clamped to the top of the middle section of the outer wall of the roller at the coupling shaft, the bottom end of the reset spring is fixedly connected to the inner bottom end of the shell, the side of the clamping frame is fixedly connected to the side of the shell, the back of the clamping rod is clamped together with the clamping frame, and the front end side of the reset spring is fixedly connected to the side of the shell.

6. The concentric welding tool for special toxic gas pipeline according to claim 5 is characterized in that: A cavity is formed on the side of the shell, and the outer wall side of the connecting rod is slidably connected to the inside of the cavity.

7. The concentric welding tool for special toxic gas pipeline according to claim 1 is characterized in that: The supporting mechanism comprises an axle seat, wherein the inner side of the axle seat on one side is rotatably connected with a forward and reverse screw, and the inner side of the axle seat on the other side is fixedly connected with a support rod, the outer wall center of the forward and reverse screw and the outer wall center of the support rod are both rotatably connected with the support seat, the outer wall of the forward and reverse screw is threadedly connected with a sleeve rod, and the other side of the sleeve rod is sleeved on the outer wall of the support rod, the front end of the axle seat on one side is threadedly connected with a servo motor through a flange, the top ends of the outer walls of the two support rods are rotatably connected with cross struts, the top ends of the two cross struts are rotatably connected with sliding adapters, the top ends of multiple sliding adapters are slidably connected with a top plate, the top end of the top plate is fixedly connected with a support plate, and the top end of the support plate is evenly rotatably connected with a plurality of rolling balls, the axle seat is fixedly connected to the top end of the fixed seat, and the output shaft of the servo motor is fixedly connected to the front end of the forward and reverse screws.

8. The concentric welding tool for special toxic gas pipeline according to claim 7 is characterized in that: A plurality of slideways are provided at the bottom end of the top plate, and the top end of the sliding adapter is slidably connected inside the slideways.

9. A concentric welding method for a special toxic gas delivery pipeline, characterized in that: Using any one of the concentric welding tooling for special toxic gas delivery pipelines according to claims 1-8, the concentric welding method for the special toxic gas delivery pipeline comprises the following steps: Step 1: When concentrically welding the special toxic gas delivery pipeline, first push the welding tool to the position where the pipeline needs to be welded through the moving mechanism, lock the roller on one side through the work of the braking component, so as to fix the moving mechanism, and then perform subsequent welding processing on the special toxic gas delivery pipeline; Step 2: Clamp the special toxic gas delivery pipelines to be welded together into the inside of the clamping components in the fixing mechanism. Through the cooperation of the fixing mechanism, the distance between the two clamping components can be adjusted to facilitate the docking of the pipelines. Through the work of the clamping components, pipelines of different specifications can be clamped and fixed, and after the pipelines are clamped, the horizontal position of the pipelines can be adjusted to make the pipeline docking more accurate. Step 3: Connect two different pipes together, clamp and fix them, then prop up the support mechanism to support the bottom end of the connected pipes. At this time, use welding tools to weld the joints of the pipes. After welding, loosen the clamping components slightly, push the welded pipe to one side, and then re-clamp the other section of the pipe to the inside of one of the clamping components, so that the special toxic gas transmission pipeline can be continuously welded.

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