Circumferential straight seam welding backing machine

Abstract

The circumferential straight seam welding gasket machine of the present invention comprises a telescopic beam, a straight seam gasket rod, a circumferential seam gasket disk, a fine-tuning mechanism, a support, a transverse driving mechanism and a longitudinal driving mechanism. The straight seam gasket rod and the circumferential seam gasket disk are respectively installed on the telescopic beam. Before use, the staff operates the fine-tuning mechanism to adjust the height difference between the straight seam gasket rod and the circumferential seam gasket disk according to the type of weld to be welded (circumferential seam or straight seam). When in use, the transverse driving mechanism is operated to drive the telescopic beam to move laterally on the support, so that the straight seam gasket rod and the circumferential seam gasket disk installed on the telescopic beam move to the bottom of the back of the weld, and the staff then operates the longitudinal driving mechanism to drive the support upward until the straight seam gasket rod and / or the circumferential seam gasket disk are pressed against the inner wall of the back of the weld and locked, thereby realizing the addition of gaskets on the back of the straight seam / circumferential seam. Compared with the prior art, the circumferential straight seam welding gasket machine of the present invention can reduce the labor intensity of welders and improve the quality of welds.

Description

Technical Field

[0001] The invention relates to the technical field of welding backings, in particular to a circumferential straight seam welding backing machine. Background Art

[0002] At present, for the welding of the annular seams and straight seams (longitudinal seams) of the cylinder of the pressure vessel, three methods are usually used for welding: arc welding, tungsten inert gas shielded argon arc welding and submerged arc welding. The pressure welds of the pressure vessel generally require the welds to ensure full penetration, that is, single-sided welding and back-side forming. In order to achieve full penetration of the welds, two methods are generally used: one is to use carbon arc gouging or grinding wheel to clean the root on the back after front welding and then weld the back. This method adds a root cleaning process; the other is to weld the front and back to form.

[0003] Tungsten inert gas argon arc welding and arc welding can form the back side of single-sided welding, but they have high requirements on the misalignment, assembly gap, welder operation skills, etc. Therefore, in actual production, arc welding is generally not considered to use single-sided welding back side forming. For tungsten inert gas argon arc welding, for the welding of thin-walled (thickness ≤ 6mm) container cylinder section welds, some manufacturers use completely fixed gaskets for welding to ensure full penetration forming, but for the welding of thick-walled (thickness > 6mm) container cylinder section welds, because the cylinder section is not easy to press on the gasket, and the inside of the cylinder is suspended, the gasket is difficult to fix, so the back side with a gasket is rarely used in actual production. Generally, single-sided welding without a gasket on the back side is used for back side forming.

[0004] When using submerged arc welding, a backing is required to ensure full penetration. The main backing materials include metal backing (carbon steel), flux pad, ceramic backing, copper pad, etc. Metal backing is not easy to remove after welding and is more suitable for occasions where the backing does not need to be removed. If it is removed, the root cleaning process must be added, which increases the workload and energy consumption. Flux pads are rarely used because the flux is in a granular form and is not easy to fix. In addition, the back forming is unstable after welding. Ceramic backing is generally disposable, easy to break, and difficult to fix. It is difficult to remove on-site during use. It is relatively dirty and messy, and the effect of use is not good, so it is rarely used in practice; for copper pads, fixed water-cooled copper rods are often used as pads in the straight seam welding of thin-walled (thickness ≤ 6mm) container cylinder sections. Due to the ovality of the cylinder, misalignment, and difficulty in compaction, gaskets are rarely used in the annular seams. For the longitudinal seams of thick-walled (thickness > 6mm) container cylinder sections, it is difficult to fix the water-cooled copper rods because the cylinder is suspended inside. Moreover, there are two types of welds, annular seams and straight seams. In actual production, it is inconvenient to add copper pads, so they are rarely used in production.

[0005] In production, arc welding and tungsten inert gas argon arc welding have low efficiency, difficult operating conditions for welders, high technical requirements for welders, and difficulty in fixing the gasket, resulting in poor weld quality under no-gasket conditions. Submerged arc welding has high efficiency, a good working environment for welders, and low technical requirements for welders, but it is inconvenient to position the gasket on the back of the straight seam. In view of the above problems in the welding of the circumferential seam and longitudinal seam of the pressure vessel cylinder, it is necessary to improve the technology of adding gaskets to the back of the circumferential seam and straight seam welding to improve production efficiency, improve product welding quality, and improve welder working conditions. Summary of the invention

[0006] In view of the above technical problems in the prior art, the present invention provides a circumferential straight seam welding gasket machine, which is convenient for positioning the gasket on the back of the straight seam and / or the circumferential seam, reduces the labor intensity of the welder and improves the weld quality.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Provided is a girth straight seam welding gasket machine, comprising a telescopic beam, a straight seam gasket rod, a girth gasket disk, a fine-adjustment mechanism, a support, a transverse drive mechanism and a longitudinal drive mechanism, wherein the straight seam gasket rod and the annular seam gasket disk are respectively mounted on the telescopic beam, the fine-adjustment mechanism is used to adjust the height difference between the straight seam gasket rod and the annular seam gasket disk, the transverse drive mechanism can drive the telescopic beam to move transversely on the support, and the longitudinal drive mechanism can drive the support to move longitudinally and lock at a preset height.

[0009] Specifically, the straight seam gasket rod is a strip-shaped copper rod, the annular seam gasket plate is a copper plate, and the two sides of the copper plate are respectively provided with interconnected spiral heat dissipation channels for circulating coolant; the copper rod is provided with an internal channel for circulating coolant; the copper rod is a complete copper rod, or the copper rod is composed of multiple segments arranged in a line, and a gap is left between two adjacent segments.

[0010] Specifically, a floating frame, a support, a second spring and a rotating shaft are provided at the annular seam gasket disk, the annular seam gasket disk is rotatably mounted on the rotating shaft, the rotating shaft is connected to the floating frame, the floating frame is mounted on the support, and the floating frame can move longitudinally, the second spring applies an upward elastic force to the rotating shaft, and the annular seam gasket disk can overcome the elastic force and move longitudinally under the external force.

[0011] Specifically, the circumferential seam straight seam welding gasket machine also includes an installation component, which includes a connecting piece, an outer slide rail and an outer slider, a support frame and a first spring. The straight seam gasket rod is installed on the support frame, and the support frame can move in the longitudinal direction. The first spring applies an upward elastic force to the support frame. The support frame is installed on the connecting piece, the outer slide rail is installed on the connecting piece along the moving direction of the telescopic beam, the outer slider is fixed to the supporting piece, and the outer slide rail can be slidably installed on the outer slider.

[0012] Specifically, between the support member and the telescopic beam, one of them is provided with an inner slide rail, and the other is provided with an inner slide block, and the inner slide rail can be slidably adapted on the inner slide block.

[0013] Specifically, the lateral drive mechanism includes a first motor, a gear and a rack, the gear is installed on the output shaft of the first motor, the rack is fixed to the telescopic beam, the gear is meshed with the rack, and the first motor drives the rack and the telescopic beam to move laterally together through the gear.

[0014] Specifically, the longitudinal drive mechanism includes a screw support, a screw, a worm gear reducer and a second motor. The screw can be slidably mounted on the screw support. The second motor drives the screw to move longitudinally to a preset height through the worm gear reducer. The upper end of the screw is connected to the support.

[0015] Specifically, the longitudinal drive mechanism also includes a guide shaft, a shaft support, a linear bearing and a locking piece. The linear bearing is fixed to the shaft support, and the guide shaft can be longitudinally moved through the linear bearing. The upper end of the guide shaft is connected to the support piece, and the locking piece is installed at the lower end of the guide shaft so that after the screw rod reaches the preset position and is locked, the locking piece can be operated by the outside to fix the guide shaft and the shaft support to each other.

[0016] Alternatively, the longitudinal drive mechanism includes a column, a transmission assembly, a third motor, a worm reducer and a saddle as the support member, the saddle is slidably mounted on the column, and the third motor can drive the saddle to move up and down along the column through the worm reducer and the transmission assembly.

[0017] Specifically, the transmission assembly includes a sprocket, a roller chain and a counterweight assembly, the third motor drives the sprocket to rotate through a worm reducer, the roller chain is adapted on the sprocket, one end of the roller chain is connected to the saddle, and the other end of the roller chain lifts the counterweight assembly; or the transmission assembly includes a ball screw, which is connected to the saddle, and the third motor drives the ball screw to move up and down through a worm reducer, so as to drive the saddle to move up and down along the column.

[0018] Beneficial effects of the present invention:

[0019] The circumferential straight seam welding padding machine of the present invention comprises a telescopic beam, a straight seam padding rod, a circumferential seam padding disk, a fine-tuning mechanism, a support, a transverse driving mechanism and a longitudinal driving mechanism. The straight seam padding rod and the circumferential seam padding disk are respectively installed on the telescopic beam. Before use, the staff operates the fine-tuning mechanism to adjust the height difference between the straight seam padding rod and the circumferential seam padding disk according to the type of the weld to be welded (circumferential seam or straight seam). If it is a circumferential seam, the top of the circumferential seam padding disk is adjusted to be higher than the straight seam padding rod; if it is a straight seam, the top of the circumferential seam padding disk is adjusted to be lower than the straight seam padding rod. When in use, the transverse driving mechanism is operated to drive the telescopic beam to move laterally on the support, so that the straight seam padding rod and the circumferential seam padding disk installed on the telescopic beam move to the bottom of the back of the weld, and the staff then operates the longitudinal driving mechanism to drive the support to move upward until the straight seam padding rod and / or the circumferential seam padding disk are pressed against the inner wall of the back of the weld and then locked, thereby realizing the addition of padding on the back of the straight seam / circumferential seam. Compared with the prior art, the circumferential straight seam welding backing machine of the present invention can reduce the labor intensity of welders and improve the quality of welds. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a circumferential straight seam welding backing machine in an embodiment.

[0021] Figure 2 for Figure 1 Magnified view at E in the middle.

[0022] Figure 3 for Figure 1 Partial view in the direction of arrow A.

[0023] Figure 4 for Figure 1 Cross-sectional view with section BB as the cross section.

[0024] Figure 5 for Figure 4 Magnified view at F in the middle.

[0025] Figure 6 It is a structural schematic diagram of a circumferential straight seam welding backing machine according to another embodiment.

[0026] Figure 7 for Figure 6 Cross-sectional view with CC as the section.

[0027] Figure 8 for Figure 7 Magnified view at G in the middle.

[0028] Reference numerals:

[0029] Telescopic beam 1;

[0030] Transverse drive mechanism 2, first motor 21, gear 22, rack 23, inner slide block 24, inner slide rail 25;

[0031] Support 3, sleeve 31, reinforcement ring 32;

[0032] Installation assembly 4, support frame 41, first spring 42, connector 43, outer slide rail 44, outer slide block 45;

[0033] Longitudinal drive mechanism 5, bottom plate 51, screw support 52, screw 53, worm gear reducer 54, second motor 55, Foma wheel 56, guide shaft 57, shaft support 58, linear bearing 59, locking member 510;

[0034] Column 61, third motor 62, saddle 63, worm reducer 64, sprocket 65, roller chain 66, counterweight assembly 67;

[0035] Straight seam liner rod 7, water cooling tube 71;

[0036] Annular seam gasket mechanism 8, annular seam gasket plate 81, heat dissipation channel 811, floating frame 82, support 83, second spring 84, rotating shaft 85, water inlet pipe 86, water outlet pipe 87;

[0037] Fine-tuning mechanism 9 , side plate 91 , slide seat 92 , bolt 93 . DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0039] The annular straight seam welding gasket machine of this embodiment is as follows Figures 1 to 5 As shown, it includes a telescopic beam 1, a straight seam pad rod 7 and an annular seam pad mechanism 8, the straight seam pad rod 7 is installed on the top of the telescopic beam 1, and the annular seam pad mechanism 8 is installed on the left end of the telescopic beam 1.

[0040] In order to facilitate the insertion of the straight seam pad rod 7 and the annular seam pad mechanism 8 into the cylinder to be welded and to position them on the back of the weld, the present embodiment is provided with a transverse driving mechanism 2 and a support member 3, wherein the support member 3 comprises a sleeve 31 and a reinforcing ring 32, wherein the reinforcing ring 32 is sleeved outside the sleeve 31 to strengthen the strength of the sleeve 31, and the telescopic beam 1 passes through the sleeve 31. The transverse driving mechanism 2 comprises a first motor 21, a gear 22 and a rack 23, wherein the first motor 21 is fixed to the support member 3, the gear 22 is mounted on the output shaft of the first motor 21, the rack 23 is fixed to the telescopic beam 1, the gear 22 is meshed with the rack 23, and the first motor 21 drives the rack 23 and the telescopic beam 1 to move laterally on the support member 3 together through the gear 22. In order to ensure the smooth movement of the telescopic beam 1, the inner top and inner bottom of the sleeve 31 of the support member 3 are respectively provided with inner sliders 24, and the telescopic beam 1 is fixed with two corresponding inner slide rails 25, and the two inner slide rails 25 are slidably adapted on the two inner slide rails 24.

[0041] In this embodiment, since the telescopic beam 1 passes through the sleeve 31 of the support member 3, the straight seam gasket rod 7 is located outside the support member 3, and the telescopic beam 1 and the straight seam gasket rod 7 move together, in order to ensure the movement stability of the straight seam gasket rod 7, the straight seam gasket rod 7 is installed on the telescopic beam 1 through the installation component 4. Specifically, the installation component 4 includes a support frame 41, a first spring 42, a connector 43 (C-shaped steel), an outer slide rail 44 and an outer slider 45. The straight seam gasket rod 7 is installed on the support frame 41, and the support frame 41 is installed on the connector 43, and the support frame 41 can move in the longitudinal direction. The first spring 42 applies an upward elastic force to the support frame 41 so that the straight seam gasket rod 7 can elastically press against the back of the weld. The outer slide rail 44 is installed on the connector 43 along the moving direction of the telescopic beam 1, and the outer slider 45 is fixed to the support member 3. The outer slide rail 44 can be slidably installed on the outer slider 45, which improves the stability of the lateral movement of the straight seam gasket rod 7.

[0042] The straight seam gasket rod 7 is a strip-shaped copper rod, and an inner channel for circulating coolant is provided in the copper rod. Cooling water is injected into the inner channel through a water-cooling pipe 71 (soft rubber tube) to take away the heat flux generated by the copper rod during operation so that the copper rod can be cooled. The copper rod is composed of a plurality of incoherent short copper rod segments arranged in a line, and a gap is left between two adjacent segments. When in use, different segments support different parts of the cylinder to be welded, and the back of the weld can be tightened and adjusted according to the misalignment of the welds of different segments, so as not to produce a large local back gap. In practice, the copper rod can be changed to a complete and continuous copper rod, which can also meet the basic gasket requirements as a non-preferred solution.

[0043] The annular seam gasket mechanism 8 includes an annular seam gasket disc 81, a floating frame 82, a support 83, a second spring 84 and a rotating shaft 85. The annular seam gasket disc 81 can be freely rotatably mounted on the rotating shaft 85. The rotating shaft 85 is connected to the floating frame 82. The floating frame 82 is mounted on the support 83, and the floating frame 82 can move longitudinally. The second spring 84 applies an upward elastic force to the rotating shaft 85 to support the rotating shaft 85. When in use, the annular seam gasket disc 81 elastically presses against the back of the annular seam to increase the gasket on the back of the annular seam. During the welding process, the cylinder to be welded rotates, and the welding gun is aimed at the annular seam gasket disc 81 from the outside of the cylinder for welding. Under the action of friction, the annular seam gasket disc 81 rotates together with the cylinder to be welded to prevent the annular seam gasket disc 81 from being burned by welding. Regarding the rotation of the annular gap gasket disk 81, the rotating shaft 85 can be fixed to the floating frame 82, and the annular gap gasket disk 81 can be installed on the rotating shaft 85 through a bearing; or the rotating shaft 85 can be rotatably installed on the floating frame 82 through a bearing, and the annular gap gasket disk 81 and the rotating shaft 85 are fixed, as long as the annular gap gasket disk 81 can rotate. The annular gap gasket disk 81 is a copper disk, and the two sides of the copper disk are respectively provided with mutually connected spiral heat dissipation channels 811 for circulating coolant. The circulating coolant can take away the heat generated by the copper disk during operation. The interior of the rotating shaft 85 is provided with a water inlet pipe 86 and a water outlet pipe 87, and the water cooling pipe 71, the water inlet pipe 86, the heat dissipation channel 811 and the water outlet pipe 87 are sequentially connected.

[0044] In order to facilitate the straight seam pad rod 7 to press against the back of the weld, the present embodiment is further provided with a longitudinal drive mechanism 5, which is used to drive the support member 3 to move longitudinally and lock it at a preset position. Specifically, the longitudinal drive mechanism 5 includes a base plate 51, a screw support 52, a screw 53, a worm gear reducer 54 and a second motor 55. A Forma wheel 56 is provided at the bottom of the base plate 51 to facilitate overall movement. The screw support 52 stands on the base plate 51, and the screw 53 can slide up and down on the screw support 52. The upper end of the screw 53 is connected to the support member 3. The second motor 55 drives the screw to move longitudinally to a preset height through the worm gear reducer 54, and then adjusts the height of the support member 3, so that under the action of the spring, the straight seam pad rod 7 rises elastically to press against the back of the weld. The function of the worm gear reducer 54 is to automatically lock the screw 53 after the second motor 55 stops working. In order to improve the stability of the up and down movement of the screw rod 53, the longitudinal drive mechanism 5 also includes a guide shaft 57, a shaft support 58, a linear bearing 59 and a locking member 510. The shaft support 58 is fixed on the base plate 51, and the linear bearing 59 is fixed to the shaft support 58. The guide shaft 57 can move longitudinally through the linear bearing 59. The upper end of the guide shaft 57 is fixedly connected to the support member 3, and the locking member 510 is installed at the lower end of the guide shaft 57, so that after the screw rod 53 reaches the preset position and is locked, the locking member 510 is operated by the outside to fix the guide shaft 57 and the shaft support 58 to each other.

[0045] In this embodiment, a fine-adjustment mechanism 9 is provided at the end of the telescopic beam 1, and the annular seam gasket mechanism 8 is installed on the telescopic beam 1 through the fine-adjustment mechanism 9, so that the fine-adjustment mechanism 9 operated by external force can longitudinally adjust the relative height of the annular seam gasket mechanism 8 and the telescopic beam 1. The purpose is to adjust the height difference between the top of the annular seam gasket disk 81 and the straight seam gasket rod 7, so as to avoid interference between the two gaskets and to make the higher gasket press against the back of the weld. The fine-tuning mechanism 9 is an existing dovetail groove screw slide, which includes a dovetail groove slide 92, which includes a side plate 91 and a slide 92. The side plate 91 is fixed to the telescopic beam 1, and the slide 92 is fixed to the support 83. The slide 92 and the side plate 91 are slidably connected through the dovetail groove and the dovetail tenon structure. The hand wheel indicated by the mark 9 in the figure is turned to push the slide 92 up and down, thereby driving the entire annular seam gasket mechanism 8 to move up and down. After the entire annular seam gasket mechanism 8 reaches the preset position, the bolt 93 is tightened on the outside of the slide 92, and the slide 92 is fixed to the side plate 91 to complete the adjustment. Of course, in practice, the fine-tuning mechanism 9 can also be replaced by other forms, as long as the height difference between the top of the annular seam gasket plate 81 and the straight seam gasket rod 7 can be adjusted.

[0046] Before use, the staff operates the fine adjustment mechanism 9 to adjust the height difference between the straight seam pad rod 7 and the annular seam pad disc 81 according to the type of weld to be welded (circumferential seam or straight seam). If it is a circular seam, the top of the annular seam pad disc 81 is adjusted to be higher than the straight seam pad rod 7; if it is a straight seam, the top of the annular seam pad disc 81 is adjusted to be lower than the straight seam pad rod 7. When in use, the transverse drive mechanism 2 is operated to drive the telescopic beam 1 to move laterally on the support 3, so that the straight seam pad rod 7 and the annular seam pad disc 81 installed on the telescopic beam 1 move to the bottom of the back of the weld, and the staff then operates the longitudinal drive mechanism 5 to drive the support 3 to move upward until the straight seam pad rod 7 and / or the annular seam pad disc 81 are pressed against the inner wall of the back of the weld and locked, thereby realizing the addition of pads on the back of the straight seam / circumferential seam. Compared with the prior art, the annular seam straight seam welding pad machine of the present invention can reduce the labor intensity of welders and improve the quality of welds.

[0047] Compared with the prior art, the circumferential straight seam welding backing machine of this embodiment has the following advantages:

[0048] 1. Existing welding backing devices are generally welding auxiliary tools. The circumferential straight seam welding backing machine of this embodiment is a device dedicated to adding welding backing;

[0049] 2. The annular seam gasket disc 81 and the straight seam gasket rod 7 are integrated, and the back gasket can be added to the annular seam or the straight seam of the container cylinder;

[0050] 3. The straight seam gasket rod 7 and the annular seam gasket plate 81 can move in both horizontal and vertical directions, which is convenient for operation;

[0051] 4. The straight seam gasket rod 7 and the annular seam gasket plate 81 are respectively pressed against the inner wall of the longitudinal seam of the workpiece through springs, so as to increase the gasket that is tightly attached to the back of the longitudinal seam and the annular seam;

[0052] 5. Copper lining can be used repeatedly;

[0053] 6. Using a circumferential straight seam welding backing machine to add backing can make it easier to achieve single-sided back-side forming in arc welding and tungsten inert gas argon arc welding, reduce the requirements for workpiece assembly quality and welder technical level, and make it easier to obtain high-quality welds;

[0054] 7. Use circumferential straight seam welding backing machine to add backing, so that submerged arc welding has a wider application range and reduces the labor intensity of welders. Submerged arc welding has no arc radiation and the working environment of welders is better.

[0055] 8. Easy to achieve automatic welding: The addition of a back gasket reduces the requirements for product assembly and makes automatic welding easy to achieve.

[0056] Another embodiment of the circumferential straight seam welding backing machine of the present invention:

[0057] See also Figures 6 to 8 As shown, the difference from the previous embodiment is that the longitudinal drive mechanism 5 includes a column 61, a transmission assembly, a third motor 62, a worm reducer 64 and a saddle 63 as a support member. The saddle 63 can be directional and slidably mounted on the column 61. The third motor 62 can drive the saddle 63 to move up and down along the column 61 through the worm reducer 64 and the transmission assembly. Specifically, the transmission assembly includes a sprocket 65, a roller chain 66 and a counterweight assembly 67. The roller chain 66 is adapted to the sprocket 65. One end of the roller chain 66 is connected to the saddle 63, and the other end of the roller chain 66 suspends the counterweight assembly 67. The third motor 62 drives the sprocket 65 to rotate through the worm reducer 64, thereby driving the saddle 63 to move up and down through the roller chain 66. In practice, the transmission assembly can be replaced by an existing ball screw part, which is connected to the saddle 63. The third motor 62 drives the ball screw up and down through the worm reducer 64 to drive the saddle 63 to move up and down along the column 61. The worm reducer 64 can automatically lock the ball screw after the third motor 62 is powered off.

[0058] In this embodiment, since the sleeve of the previous embodiment is eliminated, the straight seam pad rod 7 is directly installed on the telescopic beam 1 through the support frame 41 and the first spring 42. The inner slider 24 is fixed on the slide saddle 63, and the inner slide rail 25 on the telescopic beam 1 is adapted to the inner slider 24. The first motor 21 of the transverse driving mechanism is correspondingly fixed to the slide saddle 63, and the gear 22 on the first motor 21 is meshed with the rack 23 on the telescopic beam 1. The principle of driving the telescopic beam 1 to move transversely is the same as that of the previous embodiment.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. Circumferential straight seam welding backing machine, its characteristics are: It includes a telescopic beam, a straight seam gasket rod, an annular seam gasket disk, a fine-adjustment mechanism, a support, a transverse drive mechanism and a longitudinal drive mechanism. The straight seam gasket rod and the annular seam gasket disk are respectively installed on the telescopic beam. The fine-adjustment mechanism is used to adjust the height difference between the straight seam gasket rod and the annular seam gasket disk. The transverse drive mechanism can drive the telescopic beam to move transversely on the support. The longitudinal drive mechanism can drive the support to move longitudinally and lock it at a preset height.

2. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: The straight seam gasket rod is a strip-shaped copper rod, and the annular seam gasket plate is a copper plate. The two sides of the copper plate are respectively provided with interconnected spiral heat dissipation channels for circulating coolant; the copper rod is provided with an internal channel for circulating coolant; the copper rod is a complete copper rod, or the copper rod is composed of multiple segments arranged in a line, and a gap is left between two adjacent segments.

3. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: The circumferential seam straight seam welding gasket machine also includes an installation component, which includes a connecting piece, an outer slide rail and an outer slider, a support frame and a first spring. The straight seam gasket rod is installed on the support frame, and the support frame can move in the longitudinal direction. The first spring applies an upward elastic force to the support frame. The support frame is installed on the connecting piece, the outer slide rail is installed on the connecting piece along the moving direction of the telescopic beam, the outer slider is fixed to the supporting piece, and the outer slide rail is slidably installed on the outer slider.

4. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: A floating frame, a support, a second spring and a rotating shaft are provided at the annular seam gasket disk. The annular seam gasket disk is rotatably mounted on the rotating shaft. The rotating shaft is connected to the floating frame. The floating frame is mounted on the support and can move longitudinally. The second spring applies an upward elastic force to the rotating shaft. The annular seam gasket disk can overcome the elastic force and move longitudinally under external force.

5. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: Between the support member and the telescopic beam, one of them is provided with an inner slide rail, and the other is provided with an inner slide block, and the inner slide rail can be slidably adapted on the inner slide block.

6. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: The transverse driving mechanism includes a first motor, a gear and a rack. The gear is installed on the output shaft of the first motor, the rack is fixed to the telescopic beam, the gear is meshed with the rack, and the first motor drives the rack and the telescopic beam to move laterally together through the gear.

7. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: The longitudinal driving mechanism includes a screw support, a screw, a worm gear reducer and a second motor. The screw can be slidably mounted on the screw support. The second motor drives the screw to move longitudinally to a preset height through the worm gear reducer. The upper end of the screw is connected to the support.

8. The circumferential straight seam welding backing machine according to claim 7 is characterized in that: The longitudinal drive mechanism also includes a guide shaft, a shaft support, a linear bearing and a locking piece. The linear bearing is fixed to the shaft support, and the guide shaft can be longitudinally moved through the linear bearing. The upper end of the guide shaft is connected to the support member, and the locking piece is installed at the lower end of the guide shaft so that after the screw rod reaches a preset position and is locked, the locking piece can be operated externally to fix the guide shaft and the shaft support to each other.

9. The circumferential straight seam welding backing machine according to claim 1 is characterized in that: The longitudinal drive mechanism includes a column, a transmission assembly, a third motor, a worm reducer and a saddle as the support member. The saddle is slidably mounted on the column. The third motor can drive the saddle to move up and down along the column through the worm reducer and the transmission assembly.

10. The circumferential straight seam welding backing machine according to claim 9, characterized in that: The transmission assembly includes a sprocket, a roller chain and a counterweight assembly. The third motor drives the sprocket to rotate through a worm reducer. The roller chain is adapted on the sprocket. One end of the roller chain is connected to the saddle, and the other end of the roller chain lifts the counterweight assembly. Or the transmission assembly includes a ball screw, which is connected to the saddle. The third motor drives the ball screw to move up and down through a worm reducer to drive the saddle to move up and down along the column.

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