Pressure tank welding equipment based on a uniform distribution structure of protective gas circulation

Abstract

The present invention relates to the technical field of pressure tank welding, and discloses a pressure tank welding device based on a protective gas circulation and uniform distribution structure, including a placement part, the placement part includes a workbench, and the upper surface of the workbench is designed in an inclined manner. This pressure tank welding device based on the protective gas circulation and uniform distribution structure can effectively solve the problem that in the prior art, the welded tank body is in a high-temperature state, and the mechanical properties of the metal material are in an unstable stage. At this time, bundling the tank body for hoisting and blanking will cause the tank body to deform before it is completely cooled and shaped, affecting the dimensional accuracy and appearance quality of the tank body, resulting in poor indexes such as roundness and straightness of the tank body, making the tank body unable to meet the use requirements. The external force during bundling and hoisting will further increase the internal stress of the tank body, generating cracks in the welded joint or heat-affected zone, resulting in a reduction in the structural strength and sealing performance of the tank body.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure tank welding, and particularly relates to a pressure tank welding device based on a structure for uniform distribution of recycled protective gas. Background Art

[0002] A pressure tank is a key device for storing and transporting media such as gases and liquids, and is widely used in many fields such as petrochemical industry, natural gas, food and beverage, and pharmaceuticals. Small gas compressors also play an important role in industrial production and daily life. Due to their convenience, flexibility, and wide range of applications, there is a stable demand in the market. To meet the needs of specific industries, customized small compressors are becoming increasingly popular.

[0003] In the prior art, after welding, the welded tank body is in a high-temperature state, and the mechanical properties of the metal material are in an unstable stage. At this time, if the positioning structure during welding of the tank body is removed and it is bundled and hoisted for blanking, the bundling force will cause the tank body to deform before it is completely cooled and shaped, affecting the dimensional accuracy and appearance quality of the tank body, resulting in poor indexes such as roundness and straightness of the tank body, making the tank body unable to meet the use requirements. The external force during bundling and hoisting will further increase the internal stress of the tank body, generating cracks at the welded joint or heat-affected zone, resulting in a reduction in the structural strength and sealing performance of the tank body. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a pressure tank welding device based on a structure for uniform distribution of recycled protective gas, which can effectively solve the problems that after welding in the prior art, the welded tank body is in a high-temperature state, the mechanical properties of the metal material are in an unstable stage. At this time, when bundling and hoisting for blanking, the bundling force will cause the tank body to deform before it is completely cooled and shaped, affecting the dimensional accuracy and appearance quality of the tank body, resulting in poor indexes such as roundness and straightness of the tank body, making the tank body unable to meet the use requirements. The external force during bundling and hoisting will further increase the internal stress of the tank body, generating cracks at the welded joint or heat-affected zone, resulting in a reduction in the structural strength and sealing performance of the tank body.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides a pressure tank welding device based on a structure for uniform distribution of recycled protective gas, including:

[0007] A placement part, the placement part includes a workbench, the upper surface of the workbench is designed in an inclined manner, a cavity is opened on the upper surface of the workbench, and a placement member for conveying an external tank body is arranged on the upper surface of the workbench;

[0008] Welding part, the welding part includes a lifting table, a base table is fixedly connected to the outside of the workbench, the base table is slidably connected to the inside of the lifting table through a slide rail provided on its upper surface, a gas shielded welding gun that can be used to weld an external tank body is slidably connected to the middle of the lifting table, and a clamping member that can be used to move the external tank body is slidably connected to the base table through a chute opened in its inside;

[0009] Among them, the placing member includes rollers, a plurality of rollers are provided, adjacent rollers are rotationally connected through a chain provided on their sides, the outside of one of the rollers located at the uppermost part is rotationally connected to the inside of a support frame fixedly connected to the upper surface of the workbench, two guide rails are fixedly connected to the upper surface of the workbench and are symmetrically distributed with the workbench as the center, one of the rollers located at the lowermost part is slidably connected to the inside of the guide rail through a connecting block provided on its side, a baffle is provided on the side of the guide rail away from the lifting table, and a strong tension spring connected to the outer surface of the connecting block is provided on the side of the baffle close to the lifting table.

[0010] Furthermore, the clamping member includes a sliding block, a connecting plate is rotationally connected to the sliding block through a shaft rod provided in its inside, a torsion spring connected to the inside of the connecting plate is sleeved on the circumferential outer surface of the shaft rod, and a pressing rod is fixedly connected to the side of the connecting plate away from the sliding block.

[0011] Furthermore, three pressing rods are provided and are circumferentially arrayed with the connecting plate as the center, a ball that fits the outer side of the tank body is installed at the end of the pressing rod away from the sliding block, and a linkage member is provided in the base table through a movable cavity opened in its inside.

[0012] Furthermore, the linkage member includes an L-shaped rod, the L-shaped rod is rotationally connected to the inside of a fixed frame provided above the base table, and a connecting rod is fixedly connected to the end of the L-shaped rod close to the base table.

[0013] Furthermore, an arc-shaped block that fits the outer surface of the connecting rod is fixedly connected to the side of the sliding block away from the pressing rod, and the outside of the lifting table is designed with an arc surface.

[0014] Furthermore, a limiting plate is fixedly connected to the side of the base table away from the workbench, and a tension spring connected to the outer surface of the limiting plate is provided on the side of the sliding block away from the workbench.

[0015] Furthermore, a rolling wheel connected to the lower surface of the lifting table is provided on the side of the gas shielded welding gun close to the base table, and two rolling wheels are provided in each group and are symmetrically distributed with the L-shaped rod as the center.

[0016] Furthermore, a fixed roller is provided on the upper surface of the workbench away from the lifting table.

[0017] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention is provided with a placement member, and the placement member is designed with a flexible structure. During the welding process, it can be wrapped according to the shape of the tank body, providing stable and conforming support for the tank body, ensuring that the tank body maintains an accurate position and posture during welding, reducing the shaking and displacement of the tank body during welding, helping to improve the welding quality, and ensuring the uniformity and consistency of the weld. Compared with a rigid support, when the flexible support structure contacts the tank body, it can better adapt to the irregularities of the tank body surface and will not cause hard scratches or damage to the tank body surface, especially suitable for tank bodies with high surface quality requirements. After welding is completed, the chain and roller in the placement member are straightened under the action of a strong tension spring, and the connecting line of the axles of multiple rollers has the same slope as the upper surface of the workbench and is in an inclined state. During the straightening process of the placement member, through its elastic and stiffness characteristics, the blanking process of the tank body can be made smoother, reducing the vibration and impact of the tank body during the blanking process, reducing the risk of the tank body colliding with other equipment or the ground, and being beneficial to protecting the tank body and surrounding equipment. At the same time, this structure enables the blanking process and the welding process to be closely connected. Unlike using a hoisting device for blanking, there is no need to wait for the hoisting device to be in place and operated, etc., greatly shortening the time interval from the completion of welding to blanking of a single tank body and improving the rhythm and efficiency of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a workbench, a roller and a fixed roller in an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a placement member in an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a lifting table, a base table and a rolling wheel in an embodiment of the present invention;

[0024] Figure 5 It is a sectional view of a workbench in an embodiment of the present invention;

[0025] Figure 6Schematic diagram of the base platform and the limiting plate in the embodiment of the present invention;

[0026] Figure 7 In the embodiment of the present invention Figure 5 Schematic diagram of the partial enlargement at position A;

[0027] Figure 8 Schematic diagram of the separated structure of the clamping member, the base platform and the linkage member in the embodiment of the present invention.

[0028] The reference numerals in the figure respectively represent: 1, placing part; 11, workbench; 111, base platform; 1111, limiting plate; 12, placing member; 121, roller; 1211, connecting block; 122, chain; 123, guide rail; 124, strong tension spring; 2, welding part; 21, lifting platform; 22, gas shielded welding torch; 23, clamping member; 231, sliding block; 232, connecting plate; 233, pressing rod; 234, ball; 24, linkage member; 241, L-shaped rod; 242, connecting rod; 243, arc-shaped block; 244, tension spring; 25, rolling wheel; 26, fixed roller. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0030] The present invention will be further described below with reference to the embodiments.

[0031] Embodiment:

[0032] Please refer to Figures 1-8 , the present invention provides a technical solution: a pressure tank welding device based on a structure for uniform distribution of protective gas circulation, comprising:

[0033] Placing part 1, the placing part 1 includes a workbench 11, the upper surface of the workbench 11 is designed in an inclined manner, a cavity is formed on the upper surface of the workbench 11, and a placing member 12 for conveying an external tank body is arranged on the upper surface of the workbench 11; a protective gas circulation structure is arranged at the bottom of the cavity to collect the deposited gas.

[0034] The welding part 2, the welding part 2 includes a lifting table 21. A base table 111 is fixedly connected to the outside of the workbench 11. The base table 111 is slidably connected to the inside of the lifting table 21 through a slide rail provided on its upper surface. A gas shielded welding gun 22 that can be used to weld an external tank body is slidably connected to the middle of the lifting table 21. The base table 111 is slidably connected to a clamping member 23 that can be used to move the external tank body through a chute provided inside it;

[0035] Among them, the placing member 12 includes rollers 121. A plurality of rollers 121 are provided. Adjacent rollers 121 are rotatably connected through a chain 122 provided on their sides. The outside of the uppermost roller 121 is rotatably connected to the inside of a support frame fixed on the upper surface of the workbench 11. Two guide rails 123 are fixedly connected to the upper surface of the workbench 11 and are symmetrically distributed with the workbench 11 as the center. The lowermost roller 121 is slidably connected to the inside of the guide rail 123 through a connecting block 1211 provided on its side. A baffle is provided on the side of the guide rail 123 away from the lifting table 21. A strong tension spring 124 connected to the outer surface of the connecting block 1211 is provided on the side of the baffle close to the lifting table 21. A plurality of strong tension springs 124 are provided and are designed with adjustable tension. The strong tension spring 124 can pull the chain 122 and a plurality of rollers 121 through the connecting block 1211.

[0036] The clamping member 23 includes a sliding block 231. A connecting plate 232 is rotatably connected to the sliding block 231 through a shaft rod provided inside it. A torsion spring connected to the inside of the connecting plate 232 is sleeved on the circumferential outer surface of the shaft rod. A pressing rod 233 is fixedly connected to the side of the connecting plate 232 away from the sliding block 231.

[0037] Three pressing rods 233 are provided and are circumferentially arrayed with the connecting plate 232 as the center. A ball 234 that fits against the outer side of the tank body is installed at one end of the pressing rod 233 away from the sliding block 231. A linkage member 24 is provided in the base table 111 through a movable cavity provided inside it.

[0038] The linkage member 24 includes an L-shaped rod 241. The L-shaped rod 241 is rotatably connected to the inside of a fixed frame provided above the base table 111. A connecting rod 242 is fixedly connected to one end of the L-shaped rod 241 close to the base table 111.

[0039] An arc-shaped block 243 that fits against the outer surface of the connecting rod 242 is fixedly connected to the side of the sliding block 231 away from the pressing rod 233. The outside of the lifting table 21 is designed with an arc surface.

[0040] A limit plate 1111 is fixedly connected to the side of the base table 111 away from the workbench 11. A tension spring 244 connected to the outer surface of the limit plate 1111 is provided on the side of the sliding block 231 away from the workbench 11.

[0041] On one side of the gas shielded welding torch 22 close to the base table 111, there are rolling wheels 25 connected to the lower surface of the lifting table 21. Each group of rolling wheels 25 has two and is symmetrically distributed around the L-shaped rod 241.

[0042] On the upper surface of the workbench 11, on the side far from the lifting table 21, there is a fixed roller 26. When the placement part 12 is in a straightened state, the fixed roller 26 is adjacent to the lowermost roller 121, and multiple fixed rollers 26 and rollers 121 form a whole to ensure the stable blanking of the tank body.

[0043] The process of butt-fixing the tank body:

[0044] In gas shielded welding, the main function of the shielding gas is to form a protective barrier in the welding area, isolate the air, and prevent oxygen, nitrogen, etc. in the air from reacting with the high-temperature weld metal, thereby ensuring the welding quality. After the shielding gas is ejected from the gas shielded welding torch 22, a relatively stable shielding gas hood will be formed around the welding area, wrapping the welding molten pool and the high-temperature weld metal. To obtain the best welding effect, the gas shielded welding torch 22 should be slightly higher than the workpiece surface, so as to form an appropriate arc length and angle, which helps the shielding gas to effectively cover the molten pool and prevent oxygen, nitrogen, etc. in the air from reacting with the molten pool metal, thus avoiding welding defects. The shielding gas is heavier, which is beneficial for it to circulate and be evenly distributed around the welded tank body. At the same time, to ensure the welding stability, the method of keeping the position of the gas shielded welding torch 22 relatively stationary and the tank body rotating relatively is adopted to complete the welding.

[0045] In practical applications, the pressure tank is divided into two semi-tank semi-finished products, and circumferential welding is required. Through conveying devices such as feeding rollers, the external pressure tank is moved above the placement part 12. In the initial state, multiple rollers 121 are connected by a chain 122, and the lowermost roller 121 is affected by a strong tension spring 124. The placement part 12 is in an inclined and straightened state on the upper surface of the workbench 11, and the lifting table 21 is directly above the cavity. Since the upper surface of the workbench 11 is inclined, the feeding direction side is higher and the blanking direction side is lower. The pressure tank to be welded will smoothly enter the upper surface of the rollers 121. Automatic limit baffles are symmetrically arranged on the upper surface of the workbench 11. The baffles are closed during feeding to prevent the tank body from continuously rolling down. The tension of the strong tension spring 124 is large, and the placement part 12 is still in a straightened state.

[0046] Two sets of rolling wheels 25 are arranged at the bottom of the lifting platform 21, and the arrangement direction of the rolling wheels 25 and the rollers 121 are parallel. In the initial state, the sliding block 231 is affected by the tension of the tension spring 244, driving the pressing rod 233 to be located at the end of the base platform 111 away from the workbench 11, and the clamping member 23 is in a retracted state, which does not affect the loading of the can body. The arc block 243 on the outside of the sliding block 231 is always in contact with the outer surface of the connecting rod 242, driving the L-shaped rod 241 to rotate around the inside of the fixed frame. At this time, the side of the connecting rod 242 away from the arc block 243 is in contact with the limit block (the limit block is set at the upper position of the limit plate 1111 close to the workbench 11, and the side of the limit block close to the workbench 11 adopts an arc edge design), the angle between the L-shaped rod 241 and the upper surface of the base platform 111 is large, and the distance between the top ends of the L-shaped rods 241 on both sides is small (the distance between the top ends of the L-shaped rods 241 on both sides is always greater than the length of the lifting platform 21).

[0047] The power is turned on, and the lifting platform 21 is gradually lowered. The outer surface of one of the rolling wheels 25 is in contact with the outer surface of the tank body. As the lifting platform 21 continues to press down, the pressure applied by the lifting platform 21 to the roller 121 is greater than the tension of the strong tension spring 124. The multiple rollers 121 below tend to bend and fit with the lower surface of the tank body. The roller 121 at the bottom slides toward the upper end inside the guide rail 123. At this time, the top of the tank body gradually fits with the outer surfaces of the two rolling wheels 25, and the tank body is in the middle of the two rolling wheels 25. The tank body is centered and corrected so that the central axis of the tank body and the center line surrounded by the three pressure rods 233 are in the same vertical plane.

[0048] At the same time, when the lifting platform 21 is pressed down, the arc surface at the outer end of the lifting platform 21 contacts the outer surface of the L-shaped rod 241. The force of the lifting platform 21 pressing down is greater than the spring force of the tension spring 244. The continuous downward pressure of the lifting platform 21 will drive the L-shaped rod 241 to rotate around the inside of the fixed frame, and the L-shaped rod 241 rotates in the direction away from the workbench 11, and the distance between the L-shaped rods 241 on both sides becomes larger. Correspondingly, the connecting rod 242 is fixedly connected to the L-shaped rod 241 and rotates around the fixed frame synchronously. The outer surface of the connecting rod 242 fits tightly with the arc block 243, and drives the arc block 243 and the clamping member 23 to move toward the workbench 11. The distance between the sliding block 231 and the limit plate 1111 increases, and the tension spring 244 is in a stretched state. As the height of the lifting platform 21 decreases, the clamping members 23 on both sides will synchronously approach the tank body and move towards each other.

[0049] Until the circumferential outer surface of any one of the balls 234 in the clamping member 23 comes into contact with the arc-shaped end faces on both sides of the tank body. Under the action of the force applied by the lifting table 21, since the central axis of the tank body and the center line enclosed by the three pressing rods 233 are in the same vertical plane, different tank bodies have different diameters and heights. The connecting plate 232 deflects through the torsion spring inside it and the sliding block 231, so that the three balls 234 are all in contact with the outer surface of the tank body. As the lifting table 21 continues to press down, the clamping member 23 will push the semi-finished tank bodies on both sides to be centered. Since both semi-finished tank bodies are inside the recess formed by the bending of multiple rollers 121, they can be accurately centered completely.

[0050] When the pressing rod 233 performs welding processing operations on the tank body, it can ensure the fixed posture of the tank body, which is beneficial to improving the processing accuracy and quality, avoiding processing errors caused by the angular deviation of the tank body. At the same time, through the linkage member 24, the movement track of the clamping member 23 can be adjusted, and it can meet the clamping processing of tank bodies with different diameters. There is no need to specially design different clamping tools for tank bodies with different diameters, which reduces the production cost and the complexity of tooling design. Correspondingly, the clamping member 23 rotates through the torsion spring and the sliding block 231, and can achieve good fitting and clamping on arc surfaces with different shapes, having strong shape adaptability and meeting the different arc surface shapes of the tank body in actual processing conditions.

[0051] The process of welding the tank body:

[0052] At this time, both ends of the tank body in the radial direction are stably clamped and fixed by the clamping member 23. The lower half part of the tank body in the circumferential direction is restricted by multiple bent rollers 121. The multiple rollers 121 in the cavity are in contact with the circumferential outer surface of the tank body. The top of the circumferential outer surface of the tank body is in contact with the circumferential outer surfaces of the two rolling wheels 25. The outer surface of the rolling wheel 25 is designed with a material having a relatively large friction force.

[0053] Start the drive power supply, and the two rolling wheels 25 rotate at a constant speed in the same rotation direction. The friction between the outer surface of the rolling wheel 25 and the tank body is relatively large, driving the tank body to rotate in the opposite direction to its rotation direction. During this process, the strong tension spring 124 continuously gives the tank body an upward supporting force and wrapping property. The pressing rods 233 in the clamping members 23 at both outer ends of the tank body are in contact with the tank body through the balls 234, adopting the way of rolling friction, with small friction force, which can effectively reduce the wear on the outer surface of the tank body during the process of clamping and moving the tank body, protect the coating or oxide film on the surface of the tank body, etc., and improve the appearance quality and corrosion resistance of the tank body.

[0054] Start the gas shielded welding torch 22 to spray the shielding gas while welding, forming a protective barrier in the welding area to isolate the air and prevent oxygen, nitrogen, etc. in the air from reacting with the high-temperature weld metal, thus ensuring the welding quality. After the shielding gas is sprayed from the gas shielded welding torch 22, a relatively stable shielding gas hood will be formed around the welding area. The nozzle of the gas shielded welding torch 22 is higher than the tank body. Since the density of carbon dioxide and argon is greater than that of air, it shows a downward trend after spraying and can be evenly distributed around the weld area, improving the utilization rate of the shielding gas. The tank body rotates continuously for one circle under the action of the rolling wheels 25 and the welding is completed.

[0055] The process of blanking the tank body:

[0056] After the welding of the tank body is completed, the lifting platform 21 moves upward, and the gas shielded welding torch 22 and the rolling wheels 25 move upward synchronously. The roller 121 at the bottom is continuously pulled by the strong tension spring 124, driving the chain 122 to move in the blanking direction. The bending degree of the shape formed by the chain 122 and the multiple rollers 121 becomes lower and tends to become straight. At the same time, since the sliding block 231 is always subjected to the spring force of the tension spring 244, after the lifting platform 21 moves upward, the L-shaped rod 241 and the connecting rod 242 rotate inside the fixed frame under the action of the tension spring 244, and the distance between the tops of the two L-shaped rods 241 becomes smaller. As the lifting platform 21 rises and returns to its initial state, the clamping member 23 moves away from the workbench 11 under the action of the tension spring 244. When the placing member 12 is completely restored and in a straightened state, the automatic limit baffle above the workbench 11 is in an open state and does not restrict the tank body. The top of the tank body is no longer pressed by the rolling wheels 25, and the outer ends on both sides of the tank body are no longer fixed by the clamping member 23. Since the rollers 121 in the placing member 12 are tightened on the upper surface of the workbench 11 and have the same slope as the workbench 11, and are in an inclined state, the feeding side is higher and the blanking side is lower. The tank body naturally moves downward on the upper surface of the rollers 121 and moves to the next process.

[0057] In summary, the equipment has the following advantages:

[0058] Advantage 1: When the rolling wheels 25 press down, they will drive the tank body to squeeze the rollers 121, causing the multiple rollers 121 above the cavity to be in a bent state. The multiple rollers 121 fit the lower half of the circumferential direction of the tank body, and the tank body is in a semi-wrapped state. The two semi-finished tank bodies receive the same degree of wrapping and the same radian, which can align the welded parts on both sides of the tank body, is beneficial to improving the welding quality, and is beneficial to welding tank bodies with different diameters.

[0059] Advantage 2: When the lifting platform 21 descends, the clamping members 23 position both sides of the tank body. The clamping members 23 rotate through torsion springs and the sliding blocks 231, and can adapt to arc surfaces of different shapes, with strong versatility and flexibility. The appearance dimensions of customized small compressor tank bodies vary. Most traditional welding equipment is designed according to specific tank body dimensions and has extremely poor versatility. When facing gas compressor tank bodies with different diameters and lengths, it is usually necessary to perform cumbersome parameter adjustments and mechanical structure modifications on the equipment, and even have to replace the entire set of welding equipment, resulting in low welding efficiency. However, this equipment can meet the welding requirements for tank bodies with different diameters and lengths within a certain range, and has a wide applicability.

[0060] Advantage 3: The tank body rotates under the support of multiple rollers 121, ensuring its stability and reducing the risk of safety accidents caused by the shaking or toppling of the tank body during welding. The stable rotation of the tank body and the relatively fixed position of the gas shielded welding torch 22 make the distribution of welding spatter relatively concentrated and controllable. At the same time, multiple rollers 121 form a large arc surface enveloping support surface, controlling the deformation amount of the tank body through discrete support points, with balanced pressure application. When welding a thin-walled tank body, it is not easy to deform.

[0061] Advantage 4: The tank body rotates uniformly and stably under the action of the rollers 121 and the rolling wheels 25, enabling the shielding gas to cover the welding area more evenly, effectively blocking air, reducing defects such as oxidation and porosity, and improving the quality and performance of the welded joint. The gas shielded welding torch 22 is located above the tank body, that is, the welding direction is opposite to the direction of gravity, forming a shallow penetration and wide weld bead under the action of surface tension and centrifugal force, with reduced spatter.

[0062] Advantage 5: When welding is completed, the lifting platform 21 moves upward to restore its initial position, and the rolling wheels 25 do not contact the outer surface of the tank body. The pressure exerted by the lifting platform 21 on the tank body disappears. The chain 122 and the rollers 121 in the placing member 12 are subjected to the pulling force of the strong tension spring 124. One of the rollers 121 at the bottom pulls the remaining rollers 121 closer to the baffle through the chain 122. Multiple rollers 121 and the chain 122 form a straightened state, and the slope of the straightened chain 122 is the same as the slope of the workbench 11, enabling the automatic blanking action of the tank body. The tank body continues to rotate under the action of the rolling wheels 25, and the entire welding process is completed through the gas shielded welding torch 22 above. After welding is completed, the placing member 12 discharges the tank body. This structure enables the blanking process and the welding process to be closely connected. There is no need for manual operation to use a hoisting device for blanking, and there is no need to wait for the hoisting device to be in place and operated, etc. The time interval from the completion of welding to blanking of a single tank body is significantly shortened, improving the rhythm and efficiency of the entire production process.

[0063] Advantage 6: During the welding process, the tank body will undergo certain deformation due to heat. The placement member 12 is a flexible support structure that can adapt to this change of the tank body through its own flexible deformation, continuously providing stable wrapping support for the tank body, and will not generate excessive stress concentration due to the deformation of the tank body, avoiding adverse effects on the welding quality and the structure of the tank body.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure tank welding device based on a protective gas circulation uniform distribution structure, characterized in that: include: A placement portion (1), the placement portion (1) comprising a workbench (11), the upper surface of the workbench (11) being of inclined design, and the upper surface of the workbench (11) being provided with a placement piece (12) that can be used to transport an external tank body; A welding part (2), the welding part (2) comprising a lifting platform (21), the outer side of the workbench (11) being fixedly connected to a base platform (111), the base platform (111) being slidably connected to the inside of the lifting platform (21) via a slide rail provided on its upper surface, a gas shielded welding gun (22) for welding an external tank body being slidably connected to the middle of the lifting platform (21), and a clamping member (23) for moving the external tank body being slidably connected to the base platform (111) via a slide groove provided inside the base platform (111); The placement member (12) comprises a roller (121), wherein a plurality of rollers (121) are provided, and adjacent rollers (121) are rotatably connected via chains (122) provided on their sides, and the outer side of the roller (121) located at the top is rotatably connected to the inside of a support frame fixed to the upper surface of the workbench (11), and the upper surface of the workbench (11) is fixedly connected to a guide rail (123), and two guide rails (123) are provided and symmetrically distributed with the workbench (11) as the center, and the roller (121) located at the bottom is slidably connected to the inside of the guide rail (123) via a connecting block (1211) provided on its side, and a baffle is provided on the side of the guide rail (123) away from the lifting platform (21), and a strong tension spring (124) connected to the outer surface of the connecting block (1211) is provided on the side of the baffle close to the lifting platform (21); A rolling wheel (25) connected to the lower surface of the lifting platform (21) is provided on one side of the gas shielded welding gun (22) close to the base platform (111). Before welding, when the rolling wheel (25) is pressed downward, it drives the external tank body to squeeze the rolling wheel (121). The circumferential outer surfaces of the plurality of rollers (121) fit with the lower half of the circumferential direction of the external tank body, so that the external tank body is in a semi-wrapped state, and the plurality of rollers (121) form a curved concave state.

2. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 1 is characterized in that: The clamping member (23) comprises a sliding block (231), wherein the sliding block (231) is rotatably connected to a connecting plate (232) via a shaft arranged inside the sliding block (231), a torsion spring connected to the inside of the connecting plate (232) is sleeved on the circumferential outer surface of the shaft, and a pressing rod (233) is fixedly connected to a side of the connecting plate (232) away from the sliding block (231).

3. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 2 is characterized in that: A ball (234) that fits against the outside of the tank body is installed at one end of the pressing rod (233) away from the sliding block (231), and a linkage member (24) is provided in the base platform (111) via a movable cavity opened therein.

4. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 3 is characterized in that: The linkage member (24) comprises an L-shaped rod (241), the L-shaped rod (241) being rotatably connected to the inside of a fixing frame arranged above the base platform (111), and a connecting rod (242) being fixedly connected to one end of the L-shaped rod (241) close to the base platform (111).

5. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 4 is characterized in that: A side of the sliding block (231) away from the pressing rod (233) is fixedly connected to a curved surface block (243) that fits the outer surface of the connecting rod (242), and the outer side of the lifting platform (21) adopts a curved surface design.

6. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 5 is characterized in that: A side of the base platform (111) away from the workbench (11) is fixedly connected to a limit plate (1111), and a side of the sliding block (231) away from the workbench (11) is provided with a tension spring (244) connected to the outer surface of the limit plate (1111).

7. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 6 is characterized in that: Each group of rolling wheels (25) is provided with two rolling wheels (25) which are symmetrically distributed with the L-shaped rod (241) as the center.

8. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure according to claim 7 is characterized in that: A fixed roller (26) is provided on a side of the upper surface of the workbench (11) away from the lifting platform (21).

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