Intelligent welding device for stainless steel joints of high-strength directly-buried prefabricated thermal insulation pipes

Abstract

The invention relates to the technical field of heat preservation pipe welding, in particular to a high-strength directly-buried prefabricated heat preservation pipe stainless steel connector intelligent welding device which comprises a control mechanical arm, a telescopic frame rod fixed to the end of the control mechanical arm and rail frames symmetrically arranged at the two ends of the telescopic frame rod. The welding device is provided with four tight supporting assemblies, the two tight supporting assemblies are symmetrically arranged to form a splayed supporting frame, and the two splayed supporting frames are symmetrically arranged and used for tightly supporting an electric hot melting sleeve for a connector. The tightening assembly comprises an elastic shaft seat, a connecting end, a first tightening wheel and a second tightening wheel, the connecting end is fixedly connected to the upper end of the elastic shaft seat, and the first tightening wheel and the second tightening wheel are symmetrically and rotationally arranged on the two sides of the connecting end. In the welding process, it is guaranteed that the electric hot melting sleeve makes close contact with the heat preservation sleeve, and the welding efficiency is improved while the welding effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation pipe welding, and in particular to an intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes. Background Art

[0002] As a highly efficient and energy-saving pipeline product, the application scope of direct-buried prefabricated insulated pipe in heating, refrigeration, petroleum, natural gas, chemical industry, electricity and other fields will continue to expand. When multiple sections of insulated pipes are connected, the insulated pipes are mainly patched with electric hot-melt sleeves.

[0003] The patent with publication number CN220462643U discloses a metal hose joint welding device, which includes a base plate, a bracket fixedly connected to the top of the base plate, a first electric push rod fixedly installed on the top of the bracket, the output shaft of the first electric push rod passes through the bracket and is slidably connected to the bracket, a laser welding head is fixedly installed on the output shaft of the first electric push rod, and two positioning mechanisms are arranged on the top of the base plate, and the two positioning mechanisms are mirror-imaged; anti-slip pads are fixedly bonded to the four corners of the bottom of the base plate. The above application can facilitate the laser welding head to perform circumferential welding on the joints of two metal hoses through a simple structure, and is easy to operate, saves time and effort, improves welding efficiency, and is highly practical.

[0004] During on-site construction, the resistance wire mesh is heated by an electric heat fusion welding machine, thereby quickly melting the inner wall of the electric heat fusion sleeve and the outer wall of the insulation pipe outer protective tube in a short time, so that the two are fused together. However, during the welding process, the tightness of the connection between the electric heat fusion sleeve and the insulation sleeve affects the welding effect. It is necessary to control the preload force between the electric heat fusion sleeve and the insulation sleeve through continuous external force, which affects the processing efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that the preload force between the electric hot melt sleeve and the insulation sleeve needs to be controlled by continuous external force, which affects the processing efficiency, and to propose a high-strength direct-buried prefabricated insulation pipe stainless steel joint intelligent welding device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An intelligent welding device for a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint, comprising: a control mechanical arm, a telescopic frame rod fixed to the end of the control mechanical arm, and a track frame symmetrically arranged at both ends of the telescopic frame rod, a welding device is arranged inside the track frame, and four tightening components are arranged on the welding device, two of the tightening components are symmetrically arranged to form an eight-shaped support frame, and the two eight-shaped support frames are symmetrically arranged and used to tighten the electric hot melt sleeve for the joint; The tensioning assembly comprises an elastic shaft seat, a connecting end, a first tensioning wheel and a second tensioning wheel, wherein the connecting end is fixedly connected to the upper end of the elastic shaft seat, the first tensioning wheel and the second tensioning wheel are symmetrically arranged on both sides of the connecting end, and the first tensioning wheel is arranged at one end of the connecting end close to the welding device, and the second tensioning wheel is arranged at the other end, the first tensioning wheel and the second tensioning wheel are provided with mounting cavities inside, and the first tensioning wheel and the second tensioning wheel are provided with tensioning grooves; An air duct is fixedly connected to the middle of the connecting end, and both ends of the air duct are respectively located inside the first tension wheel and the second tension wheel. An exhaust gas collecting device is arranged inside the first tension wheel, and the exhaust gas collecting device is used for exhaust gas generated by welding.

[0007] Preferably, the track frame includes a control shaft and two semicircular frames, the control shaft is fixedly mounted on the end of the telescopic frame rod, the two semicircular frames are symmetrically fixedly connected on the upper and lower sides of the control shaft to form a circular frame, a slide rail is provided inside the semicircular frame, and clamping rings are provided on both sides of the semicircular frame.

[0008] Preferably, the welding device includes a driving block, a telescopic welding head, an air storage ring and an air jet pipe, the driving block is slidably arranged inside a semicircular frame, the telescopic welding head is vertically fixedly connected to the upper end of the driving block, the air storage ring is sleeved on the telescopic welding head, the air jet pipe is vertically fixedly connected to the side of the telescopic welding head, and the four tightening assemblies are installed on one side of the air storage ring close to the center of the circular frame.

[0009] Preferably, the exhaust gas collecting device includes an extrusion block, a plurality of control bags, a plurality of collecting bags and a plurality of sealing strips, the extrusion block is fixedly connected to the bottom end of the air duct, the control bag is fixedly connected to the side of the collecting bag, the plurality of sealing strips are respectively arranged on the side of the plurality of collecting bags away from the control bag, the control bag, the collecting bag and the sealing strips form an air collecting part, the plurality of air collecting parts are annularly fixedly installed on the inner wall of the mounting cavity of the first tensioning wheel, and the extrusion block is used to extrude the rotating air collecting part.

[0010] Preferably, a plurality of air holes are provided between the control bag and the first tension wheel, the control bag and the collecting bag are both strip-shaped, the cross-section of the control bag is rectangular, the cross-section of the collecting bag is arc-shaped, and the bottom surface of the extrusion block is a downward arc for extruding the air collecting piece.

[0011] Preferably, a cleaning assembly is provided inside the installation cavity of the second tension wheel, and the cleaning assembly is used to clean the welding position of the electric hot melt sleeve.

[0012] Preferably, the cleaning assembly includes a plurality of liquid outlet strips, a liquid storage tube, a plurality of blocking strips and a liquid guide strip, one end of the liquid storage tube is fixedly connected to the connecting end, a plurality of the blocking strips are annularly fixedly connected to the inner wall of the mounting cavity of the second tensioning wheel, a plurality of the liquid outlet strips are fixedly mounted on the second tensioning wheel and are respectively located between the plurality of blocking strips, a sliding opening is provided at the bottom of the liquid storage tube, and the liquid guide strip is sealingly and slidably arranged inside the sliding opening.

[0013] Preferably, an arc-shaped liquid outlet groove is opened on the side of the liquid guide strip, the bottom end of the liquid guide strip is set to be arc-shaped, the cross-section of the blocking strip is arc-shaped, which is used to drive the liquid guide strip to move up and down, and the width of the arc-shaped liquid outlet groove is greater than the thickness of the side wall of the liquid storage tube.

[0014] Preferably, a waste gas bag is installed on the portion of the air guide pipe located inside the second tensioning wheel. The waste gas bag is located inside the liquid storage pipe and is used to absorb the waste gas inside the first tensioning wheel.

[0015] Preferably, the liquid storage tube is filled with alcohol, and the liquid outlet bar runs through the inside and outside of the second tension wheel to discharge the alcohol.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the elastic shaft seat contacts the electric hot melt sleeve, the two sides of the electric hot melt sleeve will be flattened and pulled outward, thereby reducing the gap between the electric hot melt sleeve and the insulation sleeve, and at the same time, the first tension wheel and the second tension wheel will be pressed against the electric hot melt sleeve. When the welding device rotates inside the track frame, the eight-shaped support frame will rotate on both sides of the electric hot melt sleeve where welding is required. At the same time, due to the eight-shaped shape setting, the two sides of the electric hot melt sleeve will always have an outward pulling effect. The present invention ensures close contact between the electric hot melt sleeve and the insulation sleeve during the welding process, and does not require external force for control, thereby ensuring the welding effect and improving the welding efficiency; 2. The elastic clamping ring is used to seal and limit the welding position, which can ensure that the exhaust gas and shielding gas will not escape in large quantities during the welding process, thus protecting the environment. 3. Harmful waste gas will be generated during welding. During the rotation process, the extrusion block will first contact the control bag, and the air hole will be sealed through the control bag, so that the collection bag will be squeezed through the extrusion block. When the air pressure inside the collection bag is high, the elastic sealing strip will be opened, so that the gas inside the collection bag will be transferred to the installation cavity of the first tension wheel, and the waste gas will be collected. At the same time, when the extrusion block is separated from the gas collecting piece, the collection bag will reset under the action of its own elasticity, and exhaust will be pumped to the welding position through the air hole, so as to collect the waste gas generated by welding, reduce the escape of waste gas, and reduce the pollution to the environment; 4. When the liquid guide bar moves to the top, the arc-shaped liquid outlet groove will move to the inside of the liquid storage tube, so that the alcohol is filled into the liquid outlet groove. When the liquid guide bar moves to the bottom, the bottom of the liquid outlet groove will move to the outside of the liquid storage tube, so that the alcohol inside the liquid outlet groove will flow down. This design reduces the waste of alcohol, and only as much as needed is used, and avoids the volatilization of alcohol, ensuring that there is enough alcohol for cleaning during use; 5. The outflowing alcohol will flow into the liquid outlet bar, and the liquid outlet bar will contact the contact surface of the welding, so that the alcohol will be applied to the contact surface. At the same time, the surface will be rolled and cleaned by the rolling liquid outlet bar to ensure the cleaning effect of the welding surface and the overall welding effect; 6. The liquid inside the liquid storage tube will decrease, resulting in negative pressure inside the waste gas bag. The waste gas bag draws air from the installation cavity of the first tensioning wheel through the air guide pipe, thereby transferring the waste gas. The waste gas inside the installation cavity of the first tensioning wheel is transferred to the waste gas bag, increasing the volume of waste gas collection. In addition, due to the negative pressure of the waste gas bag, the waste gas can be actively transferred. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device proposed by the present invention; Figure 2 A schematic diagram of the telescopic rod structure of an intelligent welding device for stainless steel joints of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Figure 3 A schematic diagram of the track frame structure of a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device proposed by the present invention; Figure 4 This is a schematic diagram of the front structure of a welding device of an intelligent welding device for stainless steel joints of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Figure 5 This is a schematic diagram of the front structure of a tightening assembly of an intelligent welding device for a stainless steel joint of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of a tightening assembly of an intelligent welding device for a stainless steel joint of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Figure 7 This is a schematic structural diagram of an exhaust gas collection device of an intelligent welding device for stainless steel joints of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Figure 8 This is a schematic diagram of the front structure of a cleaning component of an intelligent welding device for stainless steel joints of a high-strength direct-buried prefabricated thermal insulation pipe proposed by the present invention; Fig. 9This is a schematic diagram of the cross-sectional structure of a cleaning component of an intelligent welding device for stainless steel joints of a high-strength directly buried prefabricated thermal insulation pipe proposed in the present invention.

[0018] In the figure: 1. control robot arm; 2. telescopic frame rod; 3. track frame; 31. control axis; 32. semicircular frame; 4. welding device; 41. drive block; 42. telescopic welding head; 43. air storage ring; 44. jet pipe; 5. tightening assembly; 51. elastic shaft seat; 52. connecting end; 53. first tightening wheel; 54. second tightening wheel; 6. waste gas collecting device; 61. extrusion block; 62. control bag; 63. collecting bag; 64. sealing strip; 7. cleaning assembly; 71. liquid outlet strip; 72. liquid storage pipe; 73. blocking strip; 74. liquid guide strip; 8. waste gas bag; 9. clamping ring; 10. air guide pipe; 11. air hole; 12. arc-shaped liquid outlet groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] The terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not used to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of the present invention without substantially changing the technical content.

[0021] Reference Figure 1-Figure 9 , a high-strength direct-buried prefabricated insulated pipe stainless steel joint intelligent welding device, comprising: a control mechanical arm 1, a telescopic frame rod 2 fixed to the end of the control mechanical arm 1 and a track frame 3 symmetrically arranged at both ends of the telescopic frame rod 2, a welding device 4 is arranged inside the track frame 3, and four tightening components 5 are arranged on the welding device 4, two of the tightening components 5 are symmetrically arranged to form an eight-shaped support frame, and the two eight-shaped supports are symmetrically arranged to tighten the electric hot melt sleeve for the joint; The tightening assembly 5 includes an elastic shaft seat 51, a connecting end 52, a first tightening wheel 53 and a second tightening wheel 54. The connecting end 52 is fixedly connected to the upper end of the elastic shaft seat 51. The first tightening wheel 53 and the second tightening wheel 54 are symmetrically arranged on both sides of the connecting end 52. The first tightening wheel 53 is arranged at one end of the connecting end 52 close to the welding device 4, and the second tightening wheel 54 is arranged at the other end. The first tightening wheel 53 and the second tightening wheel are provided with mounting cavities inside, and the first tightening wheel 53 and the second tightening wheel are provided with tightening grooves. An air duct 10 is fixedly connected to the middle of the connecting end 52, and both ends of the air duct 10 are respectively located inside the first tension wheel 53 and the second tension wheel 54. An exhaust gas collecting device 6 is provided inside the first tension wheel 53, and the exhaust gas collecting device 6 is used for exhaust gas generated by welding.

[0022] In the embodiment of the above technical solution, the welding position of the electric hot melt sleeve and the insulation sleeve is tightened to ensure the stability of the welding temperature during the patch welding process and solve the problem of different temperatures at different welding points during welding.

[0023] When the elastic shaft seat 51 contacts the electric hot melt sleeve, the two sides of the electric hot melt sleeve will be flattened and pulled outward, thereby reducing the gap between the electric hot melt sleeve and the insulation sleeve, and at the same time, the first tension wheel 53 and the second tension wheel 54 are pressed against the electric hot melt sleeve. When the welding device 4 rotates inside the track frame 3, the eight-shaped support frame will rotate on both sides of the electric hot melt sleeve where welding is required. At the same time, due to the eight-shaped shape setting, the two sides of the electric hot melt sleeve will always have an outward pulling effect. The present invention ensures close contact between the electric hot melt sleeve and the insulation sleeve during welding, and does not require external force for control, thereby ensuring the welding effect and improving the welding efficiency.

[0024] The preferred technical solution in this embodiment is: Reference Figure 1-3 The track frame 3 includes a control shaft 31 and two semicircular frames 32. The control shaft 31 is fixedly installed at the end of the telescopic frame rod 2. The two semicircular frames 32 are symmetrically fixedly connected to the upper and lower sides of the control shaft 31 to form a circular frame. A slide rail is opened inside the semicircular frame 32, and clamping rings 9 are set on both sides of the semicircular frame 32.

[0025] When the prefabricated insulation pipe is connected and welded, since the insulation pipes of different diameters need to be fixed and clamped in different positions, the distance between the two track frames 3 is changed by controlling the telescopic frame rod 2 to adapt to the welding processing at different positions. During the processing, the elastic clamping ring 9 clamps the side of the electric hot melt sleeve placed between the two insulation pipes, and then the welding device 4 is controlled to perform the welding process.

[0026] The elastic clamping ring 9 is used to seal and limit the welding position, which can ensure that waste gas and protective gas will not escape in large quantities during the welding process, thereby protecting the environment.

[0027] Reference Figure 4The welding device 4 includes a driving block 41, a telescopic welding head 42, an air storage ring 43 and an air injection pipe 44. The driving block 41 is slidably arranged inside the semicircular frame 32. The telescopic welding head 42 is vertically fixedly connected to the upper end of the driving block 41. The air storage ring 43 is sleeved on the telescopic welding head 42. The air injection pipe 44 is vertically fixedly connected to the side of the telescopic welding head 42. The four tightening assemblies 5 are installed on the side of the air storage ring 43 close to the center of the circular frame.

[0028] By controlling the driving block 41 to perform circular motion inside the circular frame, the telescopic welding head 42 is telescopically adjusted according to the distance from the welding position, so that the welding end of the telescopic welding head 42 is in contact with the welding surface for welding. During the welding process, the jet pipe 44 guides gas from the inside of the gas storage ring 43 and sprays the protective gas to the welding position, thereby avoiding oxidation during the welding process and ensuring the forming effect of the weld.

[0029] Reference Figure 7 The exhaust gas collecting device 6 includes an extrusion block 61, a plurality of control capsules 62, a plurality of collecting capsules 63 and a plurality of sealing strips 64. The extrusion block 61 is fixedly connected to the bottom end of the air duct 10, the control capsule 62 is fixedly connected to the side of the collecting capsule 63, and the plurality of sealing strips 64 are respectively arranged on the side of the plurality of collecting capsules 63 away from the control capsule 62. The control capsule 62, the collecting capsule 63 and the sealing strip 64 form a gas collecting member. The plurality of gas collecting members are annularly fixedly installed on the inner wall of the mounting cavity of the first tension wheel 53. The extrusion block 61 is used to extrude the rotating gas collecting member. A plurality of air holes 11 are provided between the control bag 62 and the first tension wheel 53. The control bag 62 and the collecting bag 63 are both strip-shaped, and the cross section of the control bag 62 is rectangular, and the cross section of the collecting bag 63 is arc-shaped. The bottom surface of the extrusion block 61 is a downward arc for extruding the air collecting member.

[0030] After the first tensioning wheel 53 contacts the electric hot melt sleeve, during the welding process, it will rotate along the electric hot melt sleeve driven by the driving block 41, and harmful exhaust gas will be generated during welding. During the rotation, since the extrusion block 61 fixed on the air guide tube 10 will not move, and the multiple gas collecting parts will rotate with the first tensioning wheel 53, during the rotation of the gas collecting parts, the extrusion block 61 will first contact the control bag 62, and the air hole 11 will be sealed by the control bag 62, so that the collecting bag 63 will be squeezed by the extrusion block 61. When the air pressure inside the collecting bag 63 is relatively large, the elastic sealing strip 64 will be opened, so that the gas inside the collecting bag 63 will be transferred to the installation cavity of the first tensioning wheel 53, and the exhaust gas will be collected. At the same time, when the extrusion block 61 is separated from the exhaust gas collecting part, the collecting bag 63 will reset under the action of its own elasticity, and exhaust will be sucked toward the welding position through the air hole 11, so as to collect the exhaust gas generated by welding, reduce the escape of exhaust gas, and reduce the pollution to the environment.

[0031] Reference Figure 8-9 A cleaning assembly 7 is provided inside the installation cavity of the second tension wheel 54, and the cleaning assembly 7 is used to clean the welding position of the electric hot melt sleeve; The cleaning assembly 7 includes a plurality of liquid outlet strips 71, a liquid storage tube 72, a plurality of blocking strips 73 and a liquid guide strip 74. One end of the liquid storage tube 72 is fixedly connected to the connecting end 52. The plurality of blocking strips 73 are annularly fixedly connected to the inner wall of the mounting cavity of the second tension wheel 54. The plurality of liquid outlet strips 71 are fixedly mounted on the second tension wheel 54 and are respectively located between the plurality of blocking strips 73. A sliding opening is provided at the bottom of the liquid storage tube 72. The liquid guide strip 74 is sealingly and slidably arranged inside the sliding opening. The side of the liquid guiding strip 74 is provided with an arc-shaped liquid outlet groove 12, the bottom end of the liquid guiding strip 74 is set to be arc-shaped, the cross-section of the blocking strip 73 is arc-shaped, and is used to drive the liquid guiding strip 74 to move up and down. The width of the arc-shaped liquid outlet groove 12 is greater than the thickness of the side wall of the liquid storage tube 72.

[0032] Since there will be dirt on the contact surface between the electric hot-melt sleeve and the outer protective tube of the insulation pipe, which will affect the welding effect, the contact surface needs to be cleaned during welding, and alcohol is usually used for cleaning.

[0033] The volatile alcohol is introduced into the liquid storage tube 72 for storage. During the rotation of the second tension wheel 54, the internal blocking bar 73 will be driven to rotate, and the rotating blocking bar 73 will drive the liquid guide bar 74 to move up and down. When the liquid guide bar 74 moves to the top, the arc-shaped liquid outlet groove will move to the inside of the liquid storage tube 72, so that the alcohol is filled into the liquid outlet groove. When the liquid guide bar 74 moves to the bottom, the bottom of the liquid outlet groove will be transferred to the outside of the liquid storage tube 72, so that the alcohol inside the liquid outlet groove will flow down. This design reduces the waste of alcohol, uses only as much as needed, and avoids the volatilization of alcohol, ensuring that there is enough alcohol for cleaning during use.

[0034] The outflowing alcohol will flow into the liquid outlet bar 71, and the liquid outlet bar 71 will contact the contact surface of the welding, so that the alcohol is applied to the contact surface. At the same time, the surface is rolled and cleaned by the rolling liquid outlet bar 71, ensuring the cleaning effect of the welding surface and the overall welding effect.

[0035] Reference Figure 6 and Fig. 9 The part of the air guide pipe 10 located inside the second tension wheel 54 is installed with a waste gas bag 8, and the waste gas bag 8 is located inside the liquid storage pipe 72, and is used to absorb the waste gas inside the first tension wheel 53; The liquid storage tube 72 is filled with alcohol, and the liquid outlet bar 71 runs through the inside and outside of the second tension wheel 54 to discharge the alcohol.

[0036] When the exhaust gas collecting device 6 collects the exhaust gas, a large amount of exhaust gas will be collected into the installation cavity of the first tensioning wheel 53. However, the space inside the installation cavity is limited and a large amount of exhaust gas cannot be stored, which affects the exhaust gas collection effect in the later stage of welding.

[0037] When the alcohol in the liquid storage tube 72 is continuously discharged as the second tensioning wheel 54 rolls, the liquid in the liquid storage tube 72 will decrease, thereby forming a negative pressure in the waste gas bag 8. The waste gas bag 8 draws air from the installation cavity of the first tensioning wheel 53 through the air guide tube 10, thereby transferring the waste gas. The waste gas in the installation cavity of the first tensioning wheel 53 is transferred to the waste gas bag 8, increasing the volume of waste gas collection. In addition, due to the negative pressure of the waste gas bag 8, the waste gas can be actively transferred.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes, comprising: A control mechanical arm, a telescopic frame rod fixed at the end of the control mechanical arm, and a track frame symmetrically arranged at both ends of the telescopic frame rod, characterized in that a welding device is arranged inside the track frame, four tightening components are arranged on the welding device, two of the tightening components are symmetrically arranged to form an eight-shaped support frame, and the two eight-shaped support frames are symmetrically arranged and used to tighten the electric hot melt sleeve for the joint; The tensioning assembly comprises an elastic shaft seat, a connecting end, a first tensioning wheel and a second tensioning wheel, wherein the connecting end is fixedly connected to the upper end of the elastic shaft seat, the first tensioning wheel and the second tensioning wheel are symmetrically arranged on both sides of the connecting end, and the first tensioning wheel is arranged at one end of the connecting end close to the welding device, and the second tensioning wheel is arranged at the other end, the first tensioning wheel and the second tensioning wheel are provided with mounting cavities inside, and the first tensioning wheel and the second tensioning wheel are provided with tensioning grooves; An air duct is fixedly connected to the middle of the connecting end, and both ends of the air duct are respectively located inside the first tension wheel and the second tension wheel. An exhaust gas collecting device is arranged inside the first tension wheel, and the exhaust gas collecting device is used for exhaust gas generated by welding.

2. According to claim 1, a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device is characterized in that: The track frame includes a control shaft and two semicircular frames, the control shaft is fixedly installed on the end of the telescopic frame rod, and the two semicircular frames are symmetrically fixedly connected on the upper and lower sides of the control shaft to form a circular frame. A sliding rail is opened inside the semicircular frame, and clamping rings are set on both sides of the semicircular frame.

3. According to claim 1, a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device is characterized in that: The welding device includes a driving block, a telescopic welding head, an air storage ring and an air injection pipe. The driving block is slidably arranged inside a semicircular frame, the telescopic welding head is vertically fixedly connected to the upper end of the driving block, the air storage ring is sleeved on the telescopic welding head, the air injection pipe is vertically fixedly connected to the side of the telescopic welding head, and the four tightening assemblies are installed on one side of the air storage ring close to the center of the circular frame.

4. According to claim 1, a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device is characterized in that: The exhaust gas collection device includes an extrusion block, multiple control bags, multiple collecting bags and multiple sealing strips. The extrusion block is fixedly connected to the bottom end of the air duct, the control bag is fixedly connected to the side of the collecting bag, and the multiple sealing strips are respectively arranged on the side of the multiple collecting bags away from the control bag. The control bag, the collecting bag and the sealing strips form an air collecting piece. The multiple air collecting pieces are annularly fixedly installed on the inner wall of the mounting cavity of the first tensioning wheel, and the extrusion block is used to extrude the rotating air collecting piece.

5. According to claim 4, a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device is characterized in that: A plurality of air holes are provided between the control bag and the first tension wheel. The control bag and the collecting bag are both strip-shaped, and the cross section of the control bag is rectangular, and the cross section of the collecting bag is arc-shaped. The bottom surface of the extrusion block is a downward arc for extruding the air collecting member.

6. According to claim 1, a high-strength direct-buried prefabricated thermal insulation pipe stainless steel joint intelligent welding device is characterized in that: A cleaning component is arranged inside the installation cavity of the second tension wheel, and the cleaning component is used for cleaning the welding position of the electric hot melt sleeve.

7. The intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes according to claim 6 is characterized in that: The cleaning assembly includes a plurality of liquid outlet strips, a liquid storage tube, a plurality of blocking strips and a liquid guide strip. One end of the liquid storage tube is fixedly connected to the connecting end. The plurality of blocking strips are annularly fixedly connected to the inner wall of the mounting cavity of the second tensioning wheel. The plurality of liquid outlet strips are fixedly mounted on the second tensioning wheel and are respectively located between the plurality of blocking strips. A sliding opening is provided at the bottom of the liquid storage tube, and the liquid guide strip is sealingly and slidably arranged inside the sliding opening.

8. The intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes according to claim 7 is characterized in that: The side of the liquid guide strip is provided with an arc-shaped liquid outlet groove, the bottom of the liquid guide strip is set to be arc-shaped, the cross-section of the blocking strip is arc-shaped, and is used to drive the liquid guide strip to move up and down. The width of the arc-shaped liquid outlet groove is greater than the thickness of the side wall of the liquid storage tube.

9. The intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes according to claim 7 is characterized in that: The portion of the air guide pipe located inside the second tension wheel is provided with a waste gas bag, and the waste gas bag is located inside the liquid storage pipe and is used for absorbing the waste gas inside the first tension wheel.

10. The intelligent welding device for stainless steel joints of high-strength direct-buried prefabricated thermal insulation pipes according to claim 7 is characterized in that: The liquid storage tube is filled with alcohol, and the liquid outlet bar runs through the inside and outside of the second tension wheel to guide the alcohol out.

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