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

Abstract

The invention relates to the technical field of pressure tank welding, and discloses pressure tank welding equipment based on a protective gas circulation uniform distribution structure, the pressure tank welding equipment comprises a placing part, the placing part comprises a workbench, and the upper surface of the workbench adopts an inclined design. The pressure tank welding equipment based on the protective gas circulation uniform distribution structure can effectively solve the problems that in the prior art, a welded tank body is in a high-temperature state, the mechanical property of a metal material is in an unstable stage, at the moment, the tank body is bound, hoisted and discharged, the tank body deforms under the condition that the tank body is not completely cooled and shaped, and the welding quality is poor. The problems that the size precision and the appearance quality of the tank body are affected, the indexes such as roundness and straightness of the tank body are poor, the tank body cannot meet the use requirement, the internal stress of the tank body is further increased due to the external force effect during binding and hoisting, cracks are generated in a welding joint or a heat affected zone, and the structural strength and the sealing performance of the tank body are reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pressure tank welding, and in particular to pressure tank welding equipment based on a protective gas circulation and uniform distribution structure. Background Art

[0002] Pressure tanks are key equipment for storing and transporting gases, liquids and other media. They are widely used in many fields such as petrochemicals, natural gas, food and beverages, 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, they have a stable demand in the market. In order to meet the needs of specific industries, customized small compressors are becoming more and more popular.

[0003] In the prior art, the tank body after welding is in a high temperature state, and the mechanical properties of the metal material are in an unstable stage. At this time, the positioning structure of the tank body during welding is released, and it is bundled, hoisted and unloaded. The binding 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 indicators 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, and cracks will occur in the welding joints or heat-affected zones, resulting in reduced structural strength and sealing of the tank body. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a pressure tank welding equipment based on a protective gas circulation and uniform distribution structure, which can effectively solve the problem that the tank body after welding in the prior art is in a high temperature state and the mechanical properties of the metal material are in an unstable stage. At this time, the binding force will cause the tank body to deform before it is completely cooled and shaped during bundling and hoisting, affecting the dimensional accuracy and appearance quality of the tank body, resulting in poor indicators such as the 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, and cracks will occur in the welding joint or heat-affected zone, resulting in reduced structural strength and sealing of the tank body.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a pressure tank welding device based on a protective gas circulation uniform distribution structure, comprising: A placement part, the placement part includes a workbench, the upper surface of the workbench is designed to be inclined, a cavity is opened on the upper surface of the workbench, and a placement piece that can be used to transport an external tank body is provided on the upper surface of the workbench; The welding part includes a lifting platform, the outer side of the workbench is fixedly connected with a base platform, the base platform is slidably connected with the inside of the lifting platform through a slide rail arranged on the upper surface thereof, the middle part of the lifting platform is slidably connected with a gas shielded welding gun that can be used for welding the external tank body, and the base platform is slidably connected with a clamping piece that can be used to move the external tank body through a slide groove provided inside the base platform; In which, the placing member includes rollers, and there are multiple rollers. Adjacent rollers are rotatably connected by chains arranged on their sides. The outer side of the roller located at the top is rotatably connected to the inside of a support frame fixed to the upper surface of the workbench. A guide rail is fixedly connected to the upper surface of the workbench. Two guide rails are provided and symmetrically distributed with the workbench as the center. The roller located at the bottom is slidably connected to the inside of the guide rail through a connecting block arranged on its side. A baffle is provided on the side of the guide rail away from the lifting platform, 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 platform.

[0006] Furthermore, the clamping member includes a sliding block, which is rotatably connected to a connecting plate via an axle disposed inside the sliding block. The circumferential outer surface of the axle is sleeved with a torsion spring connected to the inside of the connecting plate. A side of the connecting plate away from the sliding block is fixedly connected to a pressure rod.

[0007] Furthermore, three pressure rods are arranged and distributed in a circular array with the connecting plate as the center, a ball bearing which fits the outer side of the tank body is installed at one end of the pressure rod away from the sliding block, and a linkage is arranged on the base platform through an active cavity opened inside the base platform.

[0008] Furthermore, the linkage member comprises an L-shaped rod, the L-shaped rod is rotatably connected to the inside of a fixing frame arranged above the base platform, and one end of the L-shaped rod close to the base platform is fixedly connected to a connecting rod.

[0009] Furthermore, a side of the sliding block away from the pressing rod is fixedly connected with a curved block that fits with the outer surface of the connecting rod, and the outer side of the lifting platform adopts a curved surface design.

[0010] Furthermore, a side of the base platform away from the workbench is fixedly connected to a limit plate, and a side of the sliding block away from the workbench is provided with a tension spring connected to the outer surface of the limit plate.

[0011] Furthermore, a rolling wheel connected to the lower surface of the lifting platform is arranged on one side of the gas shielded welding gun close to the base platform, and each group of the rolling wheels is provided with two and are symmetrically distributed with the L-shaped rod as the center.

[0012] Furthermore, a fixed roller is provided on a side of the upper surface of the workbench away from the lifting platform.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a placement piece, which adopts a flexible structural design. During the welding process, the placement piece can be wrapped according to the shape of the tank body, can provide stable and fitting support for the tank body, ensure that the tank body maintains a precise position and posture during welding, reduce the shaking and displacement of the tank body during welding, help improve the welding quality, ensure the uniformity and consistency of the weld, and compared with the rigid support, the flexible support structure can better adapt to the irregularity of the tank body surface when in contact with the tank body, and will not cause hard scratches or damage to the tank body surface, which is particularly suitable for tanks with high surface quality requirements. After the welding is completed, the chain and roller in the placement piece are straightened under the action of a strong tension spring, and the axis connecting line of multiple rollers has the same slope as the upper surface of the workbench and is in an inclined state. During the straightening process, the placement piece can make the unloading process of the tank body smoother through its elasticity and rigidity characteristics, reduce the vibration and impact of the tank body during the unloading process, and reduce the risk of the tank body colliding with other equipment or the ground, which is conducive to protecting the tank body and surrounding equipment. At the same time, this structure enables the unloading process to be closely connected with the welding process. There is no need to wait for the lifting equipment to be in place and operated, as is required when unloading with lifting equipment. This greatly shortens the time interval from the completion of welding to unloading of a single tank body, and improves the rhythm and efficiency of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a workbench, a roller and a fixed roller according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the placement piece according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the lifting platform, the base platform and the rolling wheels according to an embodiment of the present invention; Figure 5 is a cross-sectional view of a workbench according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the base platform and the limiting plate according to an embodiment of the present invention; Figure 7 For the embodiment of the present invention Figure 5 A schematic diagram of the structure with a partial enlargement at the center; Figure 8 It is a schematic diagram of the separation structure of the clamping member, the base platform and the linkage member according to an embodiment of the present invention.

[0016] The numbers in the figure represent respectively: 1. placement part; 11. workbench; 111. base platform; 1111. limit plate; 12. placement part; 121. roller; 1211. connecting block; 122. chain; 123. guide rail; 124. strong tension spring; 2. welding part; 21. lifting platform; 22. gas shielded welding gun; 23. clamping part; 231. sliding block; 232. connecting plate; 233. pressure rod; 234. ball; 24. linkage part; 241. L-shaped rod; 242. connecting rod; 243. arc block; 244. tension spring; 25. rolling wheel; 26. fixed roller. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] Example:

[0020] See also Figure 1-Figure 8 The present invention provides a technical solution: a pressure tank welding device based on a protective gas circulation uniform distribution structure, comprising: The placement part 1 includes a workbench 11. The upper surface of the workbench 11 adopts an inclined design. A cavity is opened on the upper surface of the workbench 11. The upper surface of the workbench 11 is provided with a placement piece 12 that can be used to transport an external tank body; a protective gas circulation structure is provided at the bottom of the cavity to collect the deposited gas.

[0021] The welding part 2 includes a lifting platform 21. The outer side of the workbench 11 is fixedly connected with a base platform 111. The base platform 111 is slidably connected to the inside of the lifting platform 21 through a slide rail arranged on its upper surface. A gas shielded welding gun 22 that can be used for welding the external tank body is slidably connected to the middle part of the lifting platform 21. The base platform 111 is slidably connected to a clamping member 23 that can be used to move the external tank body through a slide groove arranged inside the base platform 111. Among them, the placing piece 12 includes a roller 121, and there are multiple rollers 121. Adjacent rollers 121 are rotatably connected by chains 122 arranged on their sides. The outer side of the top roller 121 is rotatably connected to the inside of a support frame fixed to the upper surface of the workbench 11. A guide rail 123 is fixedly connected to the upper surface of the workbench 11. Two guide rails 123 are provided and are symmetrically distributed with the workbench 11 as the center. The bottom roller 121 is slidably connected to the inside of the guide rail 123 through a connecting block 1211 arranged on its side. 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. There are multiple strong tension springs 124, which adopt an adjustable tension design. The strong tension spring 124 can pull the chain 122 and multiple rollers 121 through the connecting block 1211.

[0022] The clamping member 23 includes a sliding block 231, which is rotatably connected to a connecting plate 232 via an axle disposed 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 axle. A pressing rod 233 is fixedly connected to the side of the connecting plate 232 away from the sliding block 231.

[0023] Three pressure rods 233 are arranged and distributed in a circular array with the connecting plate 232 as the center. A ball 234 that fits the outer side of the tank body is installed at one end of the pressure rod 233 away from the sliding block 231. The base 111 is provided with a linkage member 24 through an active cavity opened inside it.

[0024] The linkage member 24 includes an L-shaped rod 241 , which is rotatably connected to the inside of a fixing frame disposed above the base platform 111 , and a connecting rod 242 is fixedly connected to one end of the L-shaped rod 241 close to the base platform 111 .

[0025] A curved block 243 that fits the outer surface of the connecting rod 242 is fixedly connected to one side of the sliding block 231 away from the pressing rod 233 , and the outer side of the lifting platform 21 adopts a curved surface design.

[0026] The side of the base platform 111 away from the workbench 11 is fixedly connected to the limit plate 1111 , and the 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 .

[0027] A rolling wheel 25 connected to the lower surface of the lifting platform 21 is disposed on one side of the gas shielded welding gun 22 close to the base platform 111 . Each group of rolling wheels 25 is provided with two rolling wheels 25 symmetrically distributed around the L-shaped rod 241 .

[0028] A fixed roller 26 is arranged on the upper surface of the workbench 11 away from the lifting platform 21. When the placing member 12 is in a straight state, the fixed roller 26 is adjacent to a roller 121 at the lower end, and the plurality of fixed rollers 26 and the roller 121 form a whole to ensure that the can body is stably unloaded.

[0029] The process of docking and fixing the tank: 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 the 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 gun 22, a relatively stable shielding gas hood will be formed around the welding area, enveloping the welding molten pool and the high-temperature weld metal therein. In order to obtain the best welding effect, the gas shielded welding gun 22 should be slightly higher than the surface of the workpiece, so that an appropriate arc length and angle can be formed, which helps the shielding gas to effectively cover the molten pool, prevent the oxygen, nitrogen, etc. in the air from reacting with the molten pool metal, thereby avoiding welding defects. The shielding gas is heavy, which is conducive to its ability to circulate and be evenly distributed around the welded tank body. At the same time, in order to ensure the stability of welding, the gas shielded welding gun 22 is relatively stationary and the tank body is relatively rotated to complete the welding.

[0030] In actual application, the pressure tank is divided into two semi-finished half tanks, which need to be welded by circumferential seam welding. The external pressure tank is moved to the top of the placement piece 12 through a conveying device such as a feeding roller. In the initial state, multiple rollers 121 are connected by a chain 122, and the roller 121 at the lowest position is acted upon by a strong tension spring 124. The placement piece 12 is in an inclined and straightened state on the upper surface of the workbench 11, and the lifting platform 21 is directly above the cavity. Since the upper surface of the workbench 11 is inclined, one side of the feeding direction is higher and the other side of the unloading direction is lower. The pressure tank to be welded will smoothly enter the upper surface of the roller 121. The upper surface of the workbench 11 is symmetrically provided with automatic limit baffles. The baffles are closed during feeding to prevent the tank body from rolling down continuously. The tension of the strong tension spring 124 is large, and the placement piece 12 is still in a straightened state.

[0031] 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).

[0032] 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.

[0033] 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.

[0034] Until the outer circumferential surface of any one of the balls 234 in the clamping member 23 contacts the arc-shaped end surfaces on both sides of the tank. Under the force applied by the lifting platform 21, since the central axis of the tank and the center line formed by the three pressing rods 233 are in the same vertical plane, different tanks have different diameters and heights, and the connecting plate 232 deflects with the sliding block 231 through its internal torsion spring, so that the three balls 234 are in contact with the outer surface of the tank. As the lifting platform 21 continues to press down, the clamping member 23 will push the semi-finished tanks on both sides to align. Since the two semi-finished tanks are in the concave formed by the bending of multiple rollers 121, they can be accurately and completely centered.

[0035] When the can body is welded, the pressing rod 233 can ensure that the posture of the can body is fixed, which is conducive to improving the processing accuracy and quality, avoiding the processing error caused by the angle deviation of the can body, and at the same time, the motion trajectory of the clamping member 23 can be adjusted through the linkage member 24, which can meet the clamping processing of can bodies with different diameters. There is no need to design different clamping tools for can bodies with different diameters, which reduces the production cost and the complexity of tool design. Accordingly, the clamping member 23 rotates with the sliding block 231 through the torsion spring, and can achieve good fit and clamping on arc surfaces of different shapes, with strong shape adaptability, meeting the different arc surface shapes of the can body under actual processing conditions.

[0036] The process of welding the tank body: At this time, the two ends of the tank body in the radial direction are stably clamped and fixed by the clamping parts 23, and the lower half of the tank body in the circumferential direction is restricted by multiple curved rollers 121. The multiple rollers 121 in the cavity are in contact with the circumferential outer surface of the tank body, and 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 surfaces of the rolling wheels 25 are designed with a material with greater friction.

[0037] Start the driving power supply, and the two rolling wheels 25 rotate at a constant speed in the same direction. The outer surface of the rolling wheel 25 has a large friction with the tank body, driving the tank body to rotate in the opposite direction of its rotation. During this process, the strong tension spring 124 continuously provides the tank body with upward support and wrapping. The pressure rod 233 in the clamping member 23 at the outer ends of both sides of the tank body fits with the tank body through the ball 234, and adopts a rolling friction method with low friction. It 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, and improve the appearance quality and corrosion resistance of the tank body.

[0038] The gas shielded welding gun 22 is started, and shielding gas is sprayed out while welding, forming a protective barrier in the welding area to isolate the air and prevent oxygen, nitrogen and other gases in the air from reacting with the high-temperature weld metal, thereby ensuring the welding quality. After the shielding gas is sprayed out from the gas shielded welding gun 22, a relatively stable shielding gas hood is formed around the welding area. The nozzle of the gas shielded welding gun 22 is higher than the tank body. Since the density of carbon dioxide and argon is greater than that of air, they tend to sink after being sprayed out, and can be evenly distributed around the weld area, thereby improving the utilization rate of the shielding gas. Under the action of the rolling wheel 25, the tank body continues to rotate one circle and completes the welding.

[0039] The process of unloading the tank: After the tank body is welded, the lifting platform 21 moves upward, the gas shielded welding gun 22 and the rolling wheel 25 move upward synchronously, and the roller 121 at the bottom is continuously subjected to the tension of the strong tension spring 124, driving the chain 122 to move downward, and the curvature of the shape formed by the chain 122 and the plurality of 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 around the inside of the fixed frame under the action of the tension spring 244, and the distance between the top ends of the L-shaped rods 241 on both sides becomes smaller. As the lifting platform 21 rises upward 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 fully restored, it is in a straightened state, and the automatic limit baffle above the workbench 11 is in an open state at this time, and does not restrict the tank body. The top of the can body is no longer pressed by the rolling wheel 25, and the outer ends of the two sides of the can body are no longer fixed by the clamping member 23. Since the roller 121 in the placement member 12 is stretched on the upper surface of the workbench 11, it has the same slope as the workbench 11 and is in an inclined state, with the loading side higher and the unloading side lower. The can body naturally moves downward on the upper surface of the roller 121 and moves to the next process.

[0040] In summary, the device has the following advantages: Advantage 1. When the rolling wheel 25 is pressed down, it will drive the tank body to squeeze the roller 121, so that the multiple rollers 121 above the cavity are in a bent state, and the multiple rollers 121 are in contact with the lower half of the tank body in the circumferential direction. The tank body is in a semi-wrapped state, and the two semi-finished tank bodies are wrapped in the same manner and have the same curvature, so the welding points of the tank bodies on both sides can be aligned, which is beneficial to improving the welding quality and is conducive to welding tanks of different diameters.

[0041] Advantage 2: When the lifting platform 21 descends, the clamping piece 23 positions both sides of the tank body. The clamping piece 23 rotates through the torsion spring and the sliding block 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 poor versatility. When faced with gas compressor tank bodies of different diameters and lengths, it is usually necessary to perform cumbersome parameter adjustments and mechanical structure modifications on the equipment, or even have to replace the entire set of welding equipment, resulting in low welding efficiency. This equipment can meet the welding needs of tank bodies of different diameters and lengths within a certain range, and has a wide range of applicability.

[0042] Advantage 3: The tank rotates with the support of multiple rollers 121, and its stability is guaranteed, reducing the risk of safety accidents caused by shaking or tipping of the tank during welding. The stable rotation of the tank and the relatively fixed position of the gas shielded welding gun 22 make the distribution of welding spatter relatively concentrated and controllable. At the same time, multiple rollers 121 form a large arc envelope support surface, and the deformation of the tank is controlled through discrete support points, and the pressure is applied evenly, so that it is not easy to deform when welding thin-walled tanks.

[0043] Advantage 4: The tank body rotates at a constant speed and stably under the action of the roller 121 and the rolling wheel 25, so that the shielding gas can cover the welding area more evenly, effectively block the air, reduce defects such as oxidation and pores, and improve the quality and performance of the welded joint. The gas shielded welding gun 22 is above the tank body, that is, the welding direction is opposite to the gravity direction, so that the molten pool forms a shallow molten depth and wide weld under the action of surface tension and centrifugal force, and the amount of spatter is reduced.

[0044] Advantage 5: When welding is completed, the lifting platform 21 moves upward to restore the initial position, the rolling wheel 25 does not contact the outer surface of the tank, the pressure exerted by the lifting platform 21 on the tank disappears, the chain 122 and the roller 121 in the placement piece 12 are subjected to the tension of the strong tension spring 124, and the roller 121 at the bottom pulls the other rollers 121 toward the baffle through the chain 122, and multiple rollers 121 and chains 122 form a straightened state, and the slope of the straightened chain 122 is the same as the slope of the workbench 11, which can complete the automatic unloading action of the tank. The tank body continues to rotate under the action of the rolling wheel 25, and the entire welding process is completed by the gas shielded welding gun 22 above. After the welding is completed, the placement piece 12 unloads the tank body. This structure enables the unloading process to be closely connected with the welding process, and there is no need to manually operate the hoisting equipment to unload, and there is no need to wait for the hoisting equipment to be in place and operated. The time interval from the completion of welding to unloading of a single tank body is greatly shortened, and the rhythm and efficiency of the entire production process are improved.

[0045] Advantage 6: During the welding process, the tank body will be deformed to a certain extent due to heat. The placement member 12 is a flexible support structure that can adapt to such changes 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, thereby avoiding adverse effects on the welding quality and the tank body structure.

[0046] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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; 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); a guide rail (123) is fixedly connected to the upper surface of the workbench (11); two guide rails (123) are provided and are symmetrically distributed with the workbench (11) as the center; 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; a baffle is provided on a 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 a side of the baffle close to the lifting platform (21).

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: 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), and each group of the rolling wheels (25) is provided with two rolling wheels and are symmetrically distributed around 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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