A plate rolling welding device for pressure vessel manufacturing

Abstract

The present invention relates to the field of pressure vessel rolling welding equipment, and in particular to a plate rolling welding device for pressure vessel manufacturing, comprising a rolled workpiece and a fixture structure, wherein the basic structure of the fixture structure comprises a clamping plate 1 and a clamping plate 2 which are parallel to each other, and a pair of short connecting rods 1 are hinged on one side of the clamping plate 1, and each of the short connecting rods 1 is hinged on one end away from the clamping plate 1 with a short connecting rod 2, and the end of the short connecting rod 2 away from the short connecting rod 1 is hinged to the clamping plate 2, and a short connecting rod 3 is hinged between the hinge shafts of the two short connecting rods 1 and 2. The rolling welding device can realize flexible assembly with the rolled workpiece, can adjust and tighten the size of the joint of the rolled workpiece, can realize the alignment of the joint of the rolled workpiece in the axial direction, can realize the alignment of the joint of the rolled workpiece in the radial direction, and can also assist the welding gun to align the joint for welding by sliding the slide and the welding gun along the screw rod 1, so that the welding operation is simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the field of pressure vessel curling welding equipment, in particular to a plate curling welding device for pressure vessel manufacturing. Background Art

[0002] When the volume of the pressure vessel is large, the middle section of the outer shell is generally manufactured by curling welding. After the metal sheet is curled, the two ends of the curling of the metal sheet are often not completely aligned and need to be adjusted before welding.

[0003] The patent document with publication number CN117961358A provides a device that integrates rolling and welding components. Among the functions that the device can provide, two slides can be used to clamp the two ends of the rolled workpiece, and reverse movement can be performed to correct the misalignment of the rolled workpiece seam. The size of the rolled workpiece seam can also be adjusted. Although the technical solution provided by the document is convenient and stable and reliable for the calibration operation of the rolled workpiece, this type of floor-standing desktop equipment also has the problems of large equipment size and high manufacturing and use costs. The number of rolling welding equipment on the market that does not have the function of correcting the deviation before welding is still high. Therefore, there is a great need for a cheap and simple rolling welding device with a rolling seam adjustment function. In order to achieve the above purpose, a plate rolling welding device for pressure vessel manufacturing is proposed. Summary of the invention

[0004] In view of the fact that the pressure vessel shell curling welding equipment with correction function mentioned above or in the prior art has the problems of large volume and high manufacturing cost, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a plate curling welding device for pressure vessel manufacturing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a plate rolling welding device for pressure vessel manufacturing, comprising a rolled workpiece and a clamp structure, the basic structure of the clamp structure comprising a clamp plate 1 and a clamp plate 2 parallel to each other, and a pair of short connecting rods 1 are hinged on one side of the clamp plate 1, and each of the short connecting rods 1 is hinged on one end away from the clamp plate 1, and the end of the short connecting rod 2 away from the short connecting rod 1 is hinged to the clamp plate 2, and a short connecting rod 3 is hinged between the hinge axes of the two short connecting rods 1 and the short connecting rod 2, and there is a hinge between the short connecting rod 1, the short connecting rod 3 and the clamp plate 1, and between the short connecting rod 2, the short connecting rod 3 and the clamp plate 2. A parallelogram structure is formed between them, the sides of the clamp plate 1 and the clamp plate 2 that are away from each other are fixedly connected with an adapter seat, and the adapter seats are ball-connected with ball sleeves, and the ends of the two adapter seats that are away from each other are fixedly connected with short tubes; the clamp structure includes a pair of clamps 1 and a pair of clamps 2, the basic structures of the clamps 1 and the clamps 2 are the same, a screw rod 1 is connected between the short tubes of the two clamps 1 and between the short tubes of the two clamps 2, the two clamps 1 are respectively clamped on both sides of one end of the rolled workpiece, and the two clamps 2 are respectively clamped on both sides of the other end of the rolled workpiece, and a screw rod 2 is connected between the ball sleeves of the adjacent clamps 1 and 2.

[0007] As a preferred embodiment of the plate rolling welding device for manufacturing pressure vessels of the present invention, the hinge axes of the short connecting rod 1, the short connecting rod 2 and the short connecting rod 3 are parallel to each other, the sides of the clamping plate 1 and the clamping plate 2 close to each other are hinged with clamping blocks, and the hinge axis of the clamping block is perpendicular to the hinge axis of the short connecting rod 1, and the axial direction of the short tube is parallel to the hinge axis of the clamping block.

[0008] As a preferred solution of the plate rolling welding device for manufacturing pressure vessels of the present invention, the clamping surface of the clamping block is provided with an arc concave, the arc axis direction of the arc concave is parallel to the hinge axis of the clamping block, and the two sides of the arc concave of the clamping block are crimped with the side walls of the rolled workpiece.

[0009] As a preferred solution of the plate rolling welding device for manufacturing pressure vessels of the present invention, the clamp one is arranged on the inner side of the rolled workpiece, and in the two adjacent clamps one and two, the clamp one of the clamp one is located on the side close to the clamp two and is arranged in a concave shape, and the clamp one of the clamp two is located on the side close to the clamp one and is arranged in a convex shape, chamfers are arranged at the corners of the two clamps one, and when the seam of the rolled workpiece is narrowed, the two clamps one are matched and plugged in through the concave and convex structure.

[0010] As a preferred solution of the plate rolling welding device for manufacturing pressure vessels of the present invention, in which: in a single clamp one, a pressure block one is provided on the side of the clamp one close to the clamp two, and the pressure block one is screwed to the clamp one, and the pressure block one is provided in the concave part of the concave shape of the clamp one.

[0011] As a preferred solution of the plate rolling welding device for manufacturing pressure vessels of the present invention, in which: in the single clamp 2, a pressure block 2 is arranged on the side of the clamp 1 close to the clamp 2, and the pressure block 2 is screwed to the clamp 1, and the pressure block 2 is arranged on the convex side of the clamp 1.

[0012] As a preferred solution of the plate rolling welding device for pressure vessel manufacturing of the present invention, one end of the screw rod is T-shaped and hung with a short tube, and the other end of the screw rod is connected with a nut, and the edges of the seam between the screw rod and the adjacent rolled workpiece are parallel to each other.

[0013] As a preferred solution of the plate rolling welding device for pressure vessel manufacturing of the present invention, one end of the second screw rod is T-shaped and hung with the ball sleeve, and the other end of the second screw rod is sleeved with a sleeve, and the end of the second screw rod located on the sleeve away from the ball sleeve is connected with a nut.

[0014] As a preferred solution of the plate rolling welding device for pressure vessel manufacturing of the present invention, one end of the short connecting rod three is in contact with the side of the rolled workpiece, and the opening direction of the angle between the short connecting rod two and the short connecting rod one points to the rolled workpiece.

[0015] As a preferred solution of the plate rolling welding device for pressure vessel manufacturing of the present invention, wherein: the screw rod is slidably connected to a slide table, and the slide table is equipped with a welding gun, and the welding gun is aimed at the joint of the rolled workpiece.

[0016] Beneficial effects of the plate rolling welding device for pressure vessel manufacturing of the present invention:

[0017] The rolling welding device can realize flexible assembly of the rolling welding device and the rolled workpiece by locking the screw rod 1 between the clamps on both sides of the rolled workpiece, so that the device has good applicability, and the size of the joint of the rolled workpiece can be adjusted by locking the screw rod 2 between the clamps on both sides of the joint, and the alignment of the joint of the rolled workpiece in the axial direction can be realized by connecting the concave and convex contours between the clamps on both sides of the joint, and the relative warping of the concave and convex splicing parts between the clamps on both sides of the joint is utilized, and the relative warping amplitude of the concave and convex splicing parts between the two clamps is controlled by pressing the pressure block 1 or the pressure block 2, so that the joint of the rolled workpiece in the radial direction can be realized; the rolling welding device can also assist the welding gun to align with the joint for welding by sliding the slide and the welding gun along the screw rod 1, so that the welding operation is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a plate rolling welding device used in pressure vessel manufacturing.

[0020] Figure 2 Exploded view of a single fixture of a plate roll welding device for pressure vessel manufacturing.

[0021] Figure 3 The present invention is a schematic diagram of the assembly structure of a plate rolling welding device for pressure vessel manufacturing and a pressure vessel rolled workpiece.

[0022] Figure 4 for Figure 3 A magnified view of the structure at center.

[0023] Figure 5 for Figure 4 Schematic diagram of the structure from a normal perspective.

[0024] Figure 6 for Figure 3 Schematic diagram of the structure from another perspective.

[0025] Figure 7 for Figure 6 Schematic diagram of the structure at B in the figure.

[0026] Figure 8 for Figure 7 Schematic diagram of the structure at C in the middle.

[0027] Fig. 9 The schematic diagram of the structure of the plate rolling welding device for pressure vessel manufacturing after the pressure vessel rolling workpiece is calibrated.

[0028] Fig.10 for Fig. 9 Schematic diagram of the structure at D in the figure.

[0029] In the figure: 100, clamp one; 101, clamp one; 102, clamp two; 103, short connecting rod one; 104, short connecting rod two; 105, short connecting rod three; 106, adapter; 107, ball sleeve; 108, short tube; 109, clamp block; 110, pressure block one; 111, pressure block two; 112, slide; 113, welding gun; 200, clamp two; 201, screw rod one; 202, screw rod two; 203, sleeve; 300, rolled workpiece. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] Example 1, reference Figure 1 to Figure 10 , which is the first embodiment of the present invention, provides a plate rolling welding device for pressure vessel manufacturing. When manufacturing the shell of the pressure vessel, it can be flexibly assembled at the joint of the rolled workpiece 300 to quickly complete the joint adjustment effect of the rolled workpiece 300, so as to facilitate the joint welding of the rolled workpiece 300. Figure 3 As shown, it includes a rolled workpiece 300 and a fixture structure, such as Figure 2 and Figure 6 As shown, the basic structure of the clamp structure includes a clamp plate 1 101 and a clamp plate 2 102 which are parallel to each other, and a pair of short connecting rods 1 103 are hinged on one side of the clamp plate 101, and each short connecting rod 1 103 is hinged on one end away from the clamp plate 101 with a short connecting rod 2 104, and one end of the short connecting rod 2 104 away from the short connecting rod 1 103 is hinged to the clamp plate 2 102, and a short connecting rod 3 105 is hinged between the hinge axes of the two short connecting rods 103 and the short connecting rod 2 104, and a parallelogram structure is formed between the short connecting rod 1 103, the short connecting rod 3 105 and the clamp plate 101, and between the short connecting rod 2 104, the short connecting rod 3 105 and the clamp plate 2 102, and the clamp plate 101 and the clamp plate 2 102 are both on the sides away from each other. It is fixedly connected with an adapter seat 106, and the adapter seat 106 is ball-connected with a ball sleeve 107, and the ends of the two adapter seats 106 that are away from each other are fixedly connected with a short tube 108. Specifically, the hinge axes of the short connecting rod 103, the short connecting rod 2 104 and the short connecting rod 3 105 are parallel to each other, and the sides of the clamping plate 101 and the clamping plate 2 102 that are close to each other are hinged with a clamping block 109, and the hinge axis of the clamping block 109 is perpendicular to the hinge axis of the short connecting rod 103, the axial direction of the short tube 108 is parallel to the hinge axis of the clamping block 109, and the clamping surface of the clamping block 109 is provided with an arc concave, and the axial direction of the arc concave is parallel to the hinge axis of the clamping block 109, and the two sides of the arc concave of the clamping block 109 are crimped with the side walls of the rolled workpiece 300.

[0032] like Figure 1 and Figure 3 As shown, the clamp structure includes a pair of clamps 100 and a pair of clamps 200. The basic structures of clamps 100 and clamps 200 are the same. A screw rod 201 is connected between the short tubes 108 of the two clamps 100 and between the short tubes 108 of the two clamps 200. The two clamps 100 are respectively clamped on both sides of one end of the rolled workpiece 300, and the two clamps 200 are respectively clamped on both sides of the other end of the rolled workpiece 300. A screw rod 202 is connected between the ball sleeves 107 of adjacent clamps 100 and clamps 200.

[0033] Further, such as Figure 4 and Fig.10 As shown, the splint 101 is arranged on the inner side of the rolled workpiece 300. In two adjacent clamps 100 and clamps 200, the splint 101 of clamp 100 is located on the side close to clamp 200 and is arranged in a concave shape, and the splint 101 of clamp 200 is located on the side close to clamp 100 and is arranged in a convex shape. Chamfers are arranged at the corners of the two splints 101, and when the seam of the rolled workpiece 300 is narrowed, the two splints 101 are matched and plugged in through the concave and convex structures.

[0034] like Fig.10 As shown, in a single clamp 100, a pressure block 110 is provided on a side of a clamp 101 located near a second clamp 102, and the pressure block 110 is screwed to the clamp 101, and the pressure block 110 is provided at the concave part of the concave shape of the clamp 101. In a single clamp 200, a pressure block 111 is provided on a side of a clamp 101 located near a second clamp 102, and the pressure block 111 is screwed to the clamp 101, and the pressure block 111 is provided at the convex side of the clamp 101.

[0035] like Figure 7 As shown, one end of the short link 3 105 contacts the side of the rolled workpiece 300, and the angle opening direction between the short link 2 104 and the short link 1 103 points to the rolled workpiece 300. Figure 7 and Figure 8 As shown, one end of the screw rod 201 is T-shaped and connected to the short tube 108, and the other end of the screw rod 201 is connected to a nut, the edges of the joints of the screw rod 201 and its adjacent rolled workpiece 300 are parallel to each other, one end of the screw rod 202 is T-shaped and connected to the ball sleeve 107, and the other end of the screw rod 202 is sleeved with a sleeve 203, and the end of the screw rod 202 located on the sleeve 203 away from the ball sleeve 107 is connected to a nut.

[0036] like Fig. 9 and Fig.10 As shown, the screw rod 201 is slidably connected to the slide 112, and the slide 112 is equipped with a welding gun 113, and the welding gun 113 is aimed at the joint of the rolled workpiece 300.

[0037] The principle and advantages of the device are further explained in combination with the existing technology: the existing metal plate rolling machine achieves the purpose of rolling the metal plate through roller rolling. Since most metal plates used to manufacture pressure vessels have a certain elasticity and after being rolled and rolled by the rolling machine, the structural stability of the rolled workpiece 300 is poor. Not only can the two ends of the rolled workpiece 300 not close by themselves, but a certain amount of misalignment will also occur. External force intervention is required before welding to align the seams of the rolled workpiece 300. In addition to using desktop calibration equipment, there is also a method of welding a temporary bracket on the rolled workpiece 300, and then using a hand winch and an iron chain to tighten the temporary bracket to achieve the purpose of adjusting and tightening the seams of the rolled workpiece 300. After welding, the temporary bracket also needs to be cut and the incision polished. The former obviously has higher equipment costs than the latter, and the latter is more inconvenient to operate.

[0038] The present invention provides a plate rolling welding device for pressure vessel manufacturing, and the rolling welding device also provides a function of adjusting the joint of the rolled workpiece 300 before welding. Therefore, the welding device mainly consists of two parts. The first part is a clamp 100 and a clamp 200 clamped and assembled at the joint of the rolled workpiece 300. Figure 1 and Figure 3 As shown, a screw rod 201 is connected between the clamps 100 and the clamps 200, and a screw rod 202 is connected between the clamp 100 and its adjacent clamp 200. By tightening the nut on the screw rod 201, the clamp 100 or the clamp 200 can clamp the side of the rolled workpiece 300, and by tightening the nut on the screw rod 202, the distance between the clamp 100 and the clamp 200 can be reduced, and the clamp 100 and the clamp 200 can be moved. 0 is distributed on both sides of the joint of the rolled workpiece 300, so tightening the distance between the clamp 100 and the clamp 200 is to tighten the joint. After the joint is tightened and closed, the two sides of the joint can be regarded as parallel to each other. At this time, the screw rod 1 201 parallel to the edge of the joint also tends to be parallel to each other. At this time, the second part of the device consisting of the slide 112 and the welding gun 113 can be hung, the slide 112 slides along the screw rod 1 201, and the welding gun 113 gradually welds the joint.

[0039] To achieve the above object, the present invention also involves the following technical details:

[0040] First, how does the clamp 100 or the clamp 200 achieve the clamping of the rolled workpiece 300? Take a pair of clamps 100 as an example. Figure 7 One end of the screw rod 201 is connected to the short tube 108 on the fixture 100, refer to Figure 8 The other end of the screw rod 201 passes through the short tube 108 on another clamp 100 and is connected with a nut. When the nut is tightened, the clamp 100 connected at both ends of the screw rod 201 is tightened toward the rolled workpiece 300. Figure 7 As shown in the figure, one end of the short connecting rod 3 105 is against the side of the rolled workpiece 300. Due to the parallelogram structure formed between the short connecting rod and the clamping plate, the clamping plate 1 101, the short connecting rod 3 105 and the clamping plate 2 102 are parallel to each other. When the two screw rods 1 201 pull the clamp 100 toward the rolled workpiece 300, the angle between the short connecting rod 2 104 and the short connecting rod 3 105 tends to decrease, so that the pressing plate 1 and the pressing plate 2 clamp the rolled workpiece 300 through the clamping block 109. The greater the torque of tightening the nut on the screw rod 1 201, the greater the clamping force of the clamp 100 on the edge of the rolled workpiece 300.

[0041] Secondly, how do the clamp 100 and the clamp 200 adjust the size of the joint of the rolled workpiece 300 through the screw rod 202? First, the screw rod 202 is plugged into the ball sleeve 107, and the ball sleeve 107 is ball-connected with the adapter 106 on the clamp, so the screw rod 202 can deflect along the misalignment direction of the joint of the rolled workpiece 300. Under the premise that the clamp 100 and the clamp 200 both clamp the rolled workpiece 300, when the joint of the rolled workpiece 300 is large and there is misalignment, at this time, by tightening the nut on the screw rod 202, the nut squeezes the clamp 100 to move relatively toward the clamp 200, such as Figure 5 As shown, at this time, the nut pushes the clamp 100 along the axis direction of the screw rod 202 through the sleeve 203, and the thrust will be exerted in the length direction of the joint of the rolled workpiece 300 ( Figure 5 in the middle) and the vertical direction ( Figure 5 b) in the figure all generate a thrust force, so that the rolled workpiece 300 can reduce the size of the joint and reduce the misalignment;

[0042] Thirdly, the final calibration of the seam of the rolled workpiece 300 cannot be completed only by the tightening effect of the screw rod 202 on the clamp 100 and the clamp 200. For example, when there is still a slight misalignment of the seam of the rolled workpiece 300 after the seam is assembled, the friction force generated by the extrusion force after the seam is assembled will offset the calibration force of the clamp 100 relative to the clamp 200 along the length direction of the seam, resulting in the inability to align the two ends of the seam of the rolled workpiece 300.

[0043] Therefore, the clamp 100 and the clamp 200 can solve the above problem by plugging into each other. Figure 4 As shown, the side of the clamp plate 101 of the clamp 100 adjacent to the clamp 200 is in a concave shape, and on the other hand, the side of the clamp plate 101 of the clamp 200 is in a convex shape, as shown in FIG. Fig.10As shown, as the joint of the rolled workpiece 300 is gradually closed, the distance between the two clamping plates 101 is gradually reduced, and the convex part of the convex shape is cross-plugged with the concave groove part. Of course, the convex part of the convex shape and the concave groove part are not aligned at the beginning, but through the chamfers on both sides of the convex shape and the chamfers on both sides of the concave groove, the two clamping plates 101 gradually align the convex and concave structures through the chamfers and sliding during the approach process, and finally plug the two together. The process of squeezing and sliding the two clamping plates 101 to align is the process of calibrating the two ends of the joint of the rolled workpiece 300.

[0044] In addition, the ideal state of the rolled workpiece 300 is a cylindrical shape. However, before welding and shaping, due to the influence of deadweight and elastic deformation, the curvatures of the two sides of the joint of the rolled workpiece 300 (i.e., the two ends of the rolled workpiece 300) are not necessarily the same, so the joint may be misaligned along the radial direction of the rolled workpiece 300. Fig.10 As shown, since the clamp 100 and the clamp 200 are clamped at different positions of the rolled workpiece 300, there will be a certain angle between the clamps 101 of the clamp 100 and the clamp 200. Therefore, when the two clamps 101 are plugged together through the concave-convex structure, there will be a relative warping phenomenon. Taking advantage of this feature, the device provides a pressure block 110 at the warping position of the convex-shaped clamp 101 relative to the concave-shaped clamp 101, and provides a pressure block 2 111 at the warping position of the concave-shaped clamp 101 relative to the convex-shaped clamp 101. Fig.10 As shown, when the screw on the pressing block 110 is tightened, the clamp 200 will be pressed toward the inside of the rolled workpiece 300 by the pressing block 110 relative to the clamp 1 100, so that one side of the joint clamped by the clamp 200 is adjusted toward the inside of the rolled workpiece 300 relative to the other side. Conversely, when the pressing block 110 is loosened and the pressing block 2 111 is locked, one side of the joint clamped by the clamp 100 is adjusted toward the inside of the rolled workpiece 300 relative to the other side, so that the joint of the rolled workpiece 300 can be not only tightened but also calibrated and aligned.

[0045] It should be noted that in the early stage of assembling the device, when the fixture clamps the rolled workpiece 300 by tightening the screw rod 201, it is necessary to adjust the screw rod 201 to be as parallel as possible to the adjacent seam edge, so that after the seam is assembled, the screw rods 201 on both sides of the seam can be parallel, and then the slide 112 and the welding gun 113 moved by the screw rod 201 can be accurately moved along the seam of the rolled workpiece 300 to complete the welding.

[0046] In summary, the rolling welding device can realize the assembly of the rolling welding device and the rolled workpiece 300 by locking the screw rod 201 located between the clamps on both sides of the rolled workpiece 300, and the size of the joint of the rolled workpiece 300 can be adjusted and tightened by locking the screw rod 202 between the clamps on both sides of the joint, and the alignment of the joint of the rolled workpiece 300 in its axial direction can be realized by connecting the concave and convex contours between the clamps on both sides of the joint, and the relative warping of the concave and convex splicing parts between the clamps on both sides of the joint is utilized, and the relative warping amplitude of the concave and convex splicing parts between the two clamps is controlled by pressing the pressure block 110 or the pressure block 2 111, so as to realize the alignment of the joint of the rolled workpiece 300 in its radial direction. The rolling welding device can also assist the welding gun 113 to align with the joint for welding by sliding the slide 112 and the welding gun 113 along the screw rod 201, so as to make the welding operation more convenient.

[0047] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plate rolling welding device for pressure vessel manufacturing, comprising a rolled workpiece (300), characterized in that: The clamp structure also includes a clamp structure, the basic structure of which includes a clamp plate 1 (101) and a clamp plate 2 (102) parallel to each other, and a pair of short connecting rods 1 (103) are hinged on one side of the clamp plate 1 (101), and each of the short connecting rods 1 (103) is hinged on one end away from the clamp plate 1 (101) to a short connecting rod 2 (104), and the end of the short connecting rod 2 (104) away from the short connecting rod 1 (103) is hinged to the clamp plate 2 (102), and a hinge axis is hinged between the two short connecting rods 1 (103) and the short connecting rod 2 (104). A short connecting rod three (105), and a parallelogram structure is formed between the short connecting rod one (103), the short connecting rod three (105) and the clamping plate one (101), and between the short connecting rod two (104), the short connecting rod three (105) and the clamping plate two (102); the sides of the clamping plate one (101) and the clamping plate two (102) away from each other are fixedly connected with a transfer seat (106), and the transfer seats (106) are ball-connected with ball sleeves (107); and the ends of the two transfer seats (106) away from each other are fixedly connected with a short tube (108); The clamp structure comprises a pair of clamps 1 (100) and a pair of clamps 2 (200), wherein the basic structures of the clamps 1 (100) and the clamps 2 (200) are the same, a screw rod 1 (201) is connected between the short tubes (108) of the two clamps 1 (100) and between the short tubes (108) of the two clamps 2 (200), the two clamps 1 (100) are respectively clamped on both sides of one end of a rolled workpiece (300), and the two clamps 2 (200) are respectively clamped on both sides of the other end of the rolled workpiece (300), and a screw rod 2 (202) is connected between the ball sleeves (107) of the adjacent clamps 1 (100) and the adjacent clamps 2 (200).

2. The plate rolling welding device for pressure vessel manufacturing according to claim 1, characterized in that: The hinge axes of the short connecting rod 1 (103), the short connecting rod 2 (104) and the short connecting rod 3 (105) are parallel to each other, and the clamping block (109) is hinged on the side where the clamping plate 1 (101) and the clamping plate 2 (102) are close to each other, and the hinge axis of the clamping block (109) is perpendicular to the hinge axis of the short connecting rod 1 (103), and the axial direction of the short tube (108) is parallel to the hinge axis of the clamping block (109).

3. The plate rolling welding device for pressure vessel manufacturing according to claim 2, characterized in that: The clamping surface of the clamp block (109) is provided with an arc concave, the arc axis direction of the arc concave is parallel to the hinge axis of the clamp block (109), and the two sides of the arc concave of the clamp block (109) are pressed against the side wall of the rolled workpiece (300).

4. The plate rolling welding device for pressure vessel manufacturing according to claim 1, characterized in that: The clamping plate 1 (101) is arranged on the inner side of the rolled workpiece (300). In the two adjacent clamps 1 (100) and clamps 2 (200), the clamping plate 1 (101) of the clamp 1 (100) is located on the side close to the clamp 2 (200) and is arranged in a concave shape, and the clamping plate 1 (101) of the clamp 2 (200) is located on the side close to the clamp 1 (100) and is arranged in a convex shape. Chamfers are arranged at the corners of the two clamping plates 1 (101), and when the joint of the rolled workpiece (300) is narrowed, the two clamping plates 1 (101) are matched and plugged in through the concave and convex structures.

5. The plate rolling welding device for pressure vessel manufacturing according to claim 4, characterized in that: In a single clamp 1 (100), a pressure block 1 (110) is provided on a side of the clamp 1 (101) close to the clamp 2 (102), and the pressure block 1 (110) is screw-connected to the clamp 1 (101), and the pressure block 1 (110) is provided in a concave portion of the concave shape of the clamp 1 (101).

6. The plate rolling welding device for pressure vessel manufacturing according to claim 5, characterized in that: In a single clamp 2 (200), a pressure block 2 (111) is provided on a side of the clamp 1 (101) close to the clamp 2 (102), and the pressure block 2 (111) is screw-connected to the clamp 1 (101), and the pressure block 2 (111) is provided on the convex side of the clamp 1 (101).

7. The plate rolling welding device for pressure vessel manufacturing according to claim 1, characterized in that: One end of the screw rod 1 (201) is connected to the short tube (108) in a T-shape, and the other end of the screw rod 1 (201) is connected to a nut. The seam edges of the screw rod 1 (201) and the adjacent rolled workpiece (300) are parallel to each other.

8. The plate rolling welding device for pressure vessel manufacturing according to claim 7, characterized in that: One end of the second screw rod (202) is connected to the ball sleeve (107) in a T-shape, and the other end of the second screw rod (202) is sleeved with a sleeve (203). The end of the second screw rod (202) located on the sleeve (203) away from the ball sleeve (107) is connected with a nut.

9. The plate rolling welding device for pressure vessel manufacturing according to claim 1, characterized in that: One end of the short connecting rod 3 (105) contacts the side of the rolled workpiece (300), and the opening direction of the angle between the short connecting rod 2 (104) and the short connecting rod 1 (103) points towards the rolled workpiece (300).

10. The plate rolling welding device for pressure vessel manufacturing according to claim 1, characterized in that: The screw rod 1 (201) is slidably connected to a slide table (112), and a welding gun (113) is installed on the slide table (112), and the welding gun (113) is aimed at the joint of the rolled workpiece (300).

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