Auxiliary device for circumferential welding of large pressure vessels

Abstract

The present invention discloses an auxiliary device for circumferential seam welding of large pressure vessels, relates to the field of welding technology, and comprises two welding auxiliary devices, wherein a connecting assembly is arranged between the two welding auxiliary devices, and a guiding transmission assembly is arranged between the two welding auxiliary devices; by starting a connecting motor, a threaded shaft can be driven to rotate, so that two groups of welding auxiliary devices carrying pressure vessels gradually approach each other, and at the same time, under the cooperation of the guiding transmission assembly and the supporting assembly, two groups of supporting plates can be driven to contact the ground to support the ground; during the welding process of the pressure vessel, if it topples due to an operational error, the support of the two groups of supporting plates can greatly reduce the probability of the welding auxiliary equipment tipping over, thereby improving the safety in the welding operation; and the provision of the wear-resistant plate can prevent displacement during the welding process of the pressure vessel, thereby greatly improving the welding stability.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to an auxiliary device for circumferential seam welding of large pressure vessels. Background Art

[0002] A pressure vessel is a sealed container that can withstand pressure. It has a wide range of uses. For example, various special compressors and auxiliary machines of refrigeration compressors (coolers, buffers, oil-water separators, gas tanks, evaporators, liquid coolant tanks, etc.) are all pressure vessels.

[0003] During the welding process of existing pressure vessels, it is usually necessary to use lifting equipment (such as a crane) to lift them, place the large cylindrical pressure vessel on the top of the auxiliary device through a sling, and then use welding equipment to weld the annular seams between adjacent pressure vessels. In order to ensure the convenience of movement, the existing auxiliary device usually has a mobile device (such as a universal wheel) installed at the bottom of the auxiliary device.

[0004] There are auxiliary equipment for circumferential seam welding of large pressure vessels in the prior art. For example, Chinese invention patent application with publication number CN117548918A discloses an auxiliary device for circumferential seam welding of large pressure vessels and a welding process, which includes two welding tables and two pairs of rollers arranged on the welding tables. The welding tables are slidably connected to the ground and also include an articulated rod, one end of the articulated rod is hinged to the welding table, and the hinge point is slidably connected to the welding table, and a rotating part for driving the articulated rod to rotate is arranged on the welding table; a positioning rod, one end of the positioning rod is fixedly connected to the free end of the articulated rod, the positioning rod is arranged perpendicular to the articulated rod, and after the articulated rod is rotated upward, the positioning rod is used to limit the edges of both ends of the metal cylinder; a support rod, the support rod is arranged below the articulated rod, both ends of the support rod are simultaneously articulated to the articulated rod and the welding table, and the support rod is slidably connected to the hinge point of the articulated rod.

[0005] However, the above patent still has certain shortcomings. During the circumferential seam welding of large pressure vessels, it is necessary to push two sets of auxiliary devices with pressure vessels placed on them close to each other and then perform welding. During the welding process, if the pressure vessel topples over due to sudden external force or misoperation, the friction between the auxiliary device and the ground is low due to the installation of a mobile device at the bottom of the auxiliary device, which can easily cause the pressure vessel and the auxiliary device to topple over together, thereby posing certain safety hazards. In addition, most large pressure vessels are heavy, so the toppling of the auxiliary devices will directly damage the auxiliary devices. Summary of the invention

[0006] The purpose of the present invention is to provide an auxiliary device for large pressure vessel annular seam welding to solve the problems in the prior art.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] An auxiliary device for circumferential seam welding of a large pressure vessel comprises two welding auxiliary devices, a connecting assembly is arranged between the two welding auxiliary devices, a guide transmission assembly is arranged between the two welding auxiliary devices, a supporting assembly is arranged outside the two welding auxiliary devices, and receiving assemblies are arranged on both sides of the top of the two welding auxiliary devices;

[0009] The connection assembly includes a threaded shaft disposed on the inner wall of the welding auxiliary equipment;

[0010] The support assembly includes two groups of upper slide seats arranged on both sides of the outer wall of the welding auxiliary equipment, one side outer wall of each upper slide seat is rotatably connected to an upper rotating rod, the other end of the upper rotating rod is rotatably connected to a lower slide seat, the bottom end of the lower slide seat is slidably connected to a support plate, one side outer wall of the welding auxiliary equipment is rotatably connected to a lower rotating rod rotatably connected to the support plate, and the lower rotating rod is rotatably connected to the upper rotating rod;

[0011] The receiving assembly includes a lower fixing seat, and a plurality of pressure container bodies are arranged on the top ends of the lower fixing seats.

[0012] Preferably, a connecting motor is provided on one side of one of the welding auxiliary devices, one end of the threaded shaft is in the shape of a bare rod, and the bare rod-shaped end of the threaded shaft is rotatably connected to the inner wall of one of the welding auxiliary devices, the other end of the threaded shaft is in the shape of a thread, and the threaded end of the threaded shaft is rotatably connected to the inner wall of another welding auxiliary device, a threaded hole matching the threaded shaft is provided on the outer wall of the other welding auxiliary device, and the connecting motor and the threaded shaft are connected via a coupling.

[0013] Preferably, the guide transmission assembly includes a telescopic sleeve, and the telescopic sleeve is fixedly connected to one of the welding auxiliary devices, a plug-in rod is slidably provided on the inner wall of the telescopic sleeve, and the plug-in rod is plugged into the inside of the other welding auxiliary device, a reset spring is sleeved on the outer wall of the plug-in rod, the reset spring is located inside the telescopic sleeve, one end of the reset spring is fixedly connected to the plug-in rod, and the other end of the reset spring is fixedly connected to the inner wall of the telescopic sleeve, a blocking disk is fixed on the outer wall of the plug-in rod, and a plug-in hole matching one end of the plug-in rod is provided on the outer wall of the other welding auxiliary device, and the other welding auxiliary device The outer wall of the welding auxiliary device is provided with a blocking groove matching the blocking disk, and a first magnetic block is fixed to the other end of the plug-in rod, and a second magnetic block in contact with the first magnetic block is provided on the inner wall of the welding auxiliary device, and the second magnetic block is slidably connected to the inner wall of the welding auxiliary device, and a connecting rod is fixed on the other side of the second magnetic block, and the connecting rod is fixedly connected to the upper slide seat, and another magnetic abutment rod in contact with one end of the plug-in rod is slidably provided on the inner wall of the welding auxiliary device, and a group of guide transmission components is fixed on the other side of the magnetic abutment rod, and a pair of mutually adsorbed magnetic blocks are provided between one end of the plug-in rod and the magnetic abutment rod.

[0014] Preferably, a lower slide groove matching the lower slide seat is opened on the top of the support plate, an upper slide groove matching the upper slide seat is opened on the outer wall of the welding auxiliary equipment, the upper rotating rod and the lower rotating rod are cross-arranged, and a wear-resistant plate is arranged at the bottom end of the support plate.

[0015] Preferably, the receiving assembly includes two pairs of receiving seats fixed to the top of the welding auxiliary equipment, and the lower fixed seat is fixed to the top of the receiving seat, an upper baffle is rotatably provided at one end of the lower fixed seat, and a torsion spring is fixed between the lower fixed seat and the upper baffle, a lower driving wheel extending to the outside of the inner wall of the lower fixed seat is rotatably provided, and an upper driving wheel extending to the outside of the inner wall of the upper baffle is rotatably connected, the bottom of the outer wall of the pressure vessel body contacts the top of the two groups of lower driving wheels, and the outer walls on both sides of the pressure vessel body contact the outer walls of the two groups of upper driving wheels.

[0016] Preferably, the inner wall of the lower fixed seat is rotatably connected with a pulley extending to the inner wall of the upper baffle, the lower driving wheel and the pulley are commonly wound with a lower belt, and the upper driving wheel and the pulley are commonly wound with an upper belt.

[0017] Preferably, the welding auxiliary equipment is provided with an anti-roll component extending to its outside, the anti-roll component includes a connecting rotating rod rotatably connected to the outer wall of one side of the upper baffle, the other end of the connecting rotating rod is rotatably connected to an extension rod slidably connected to the top of the receiving seat, an inner slide is fixed to the bottom of the extension rod, outer slides are slidably provided on the outer walls on both sides of the inner slide, the outer slide is slidably connected to the inner wall of the welding auxiliary equipment, and the bottom end of the outer slide is fixedly connected to the top of the connecting rod, the inner wall of the outer slide is provided with a plurality of grooves matching the inner slide, and the plurality of grooves are equidistantly distributed, and the inner wall of the outer slide is provided with a plurality of corresponding guide grooves below the plurality of grooves.

[0018] Preferably, a plurality of sets of transfer wheels are installed at the bottom end of the welding auxiliary equipment.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can drive the threaded shaft to rotate by starting the connection motor, so that the two groups of welding auxiliary equipment carrying the pressure vessel gradually approach each other. At the same time, under the cooperation of the guide transmission assembly and the support assembly, the two groups of support plates can be driven to contact the ground to support the ground. During the welding process of the pressure vessel, if it falls due to an operation error, the probability of the welding auxiliary equipment tipping over can be greatly reduced under the support of the two groups of support plates, thereby improving the safety of the welding operation. In addition, the setting of the wear-resistant plate can prevent displacement during the welding process of the pressure vessel, greatly improving the welding stability.

[0021] 2. The present invention uses a lifting device to lift the pressure vessel between multiple groups of lower fixed seats. At the same time, the upper baffle is tightly attached to the arc-shaped outer wall of the pressure vessel body under the action of the torsion spring. During the welding operation, by starting the connecting motor, the outer slide can be driven to slide, and the slot can be engaged with the inner slide, so that the upper baffle is engaged. At this time, if an emergency occurs in the pressure vessel, the upper baffle can block the pressure vessel that is about to roll down, and the upper baffle can rotate around the contact position with the lower fixed seat, so as to adapt to pressure vessels of different sizes and improve the compatibility of welding auxiliary equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the connection structure between the welding auxiliary equipment of the present invention and the pressure vessel body;

[0024] Figure 2 A bottom view of the welding auxiliary device of the present invention;

[0025] Figure 3 It is a three-dimensional diagram of the overall structure of the welding auxiliary equipment of the present invention;

[0026] Figure 4 for Figure 3 A partial enlarged view of middle A;

[0027] Figure 5 for Figure 3 A partial enlarged view of B in the middle;

[0028] Figure 6 It is a structural schematic diagram of the connection assembly of the present invention;

[0029] Figure 7 for Figure 6 A partial enlarged view of middle C;

[0030] Figure 8 It is a side structural cross-sectional view of the welding auxiliary equipment of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the guide transmission assembly of the present invention;

[0032] Fig.10 It is a schematic diagram of the connection structure between the inner slide and the outer slide of the present invention;

[0033] Fig.11 is a three-dimensional diagram of the outer slide of the present invention;

[0034] Fig.12 It is a structural schematic diagram of the receiving component of the present invention.

[0035] In the figure: 1, welding auxiliary equipment; 11, connecting assembly; 111, connecting motor; 112, threaded shaft; 113, threaded hole;

[0036] 12. Guide transmission assembly; 121. Plug rod; 122. Plug hole; 123. Blocking plate; 124. Blocking groove; 125. Telescopic sleeve; 126. Return spring; 127. First magnetic block; 128. Second magnetic block; 129. Connecting rod; 13. Support assembly; 131. Upper slide seat; 132. Upper rotating rod; 133. Lower slide seat; 134. Lower rotating rod; 135. Support plate; 136. Endurance Grinding plate; 14, receiving assembly; 141, receiving seat; 142, lower fixed seat; 143, upper baffle; 144, torsion spring; 145, lower driving wheel; 146, pulley; 147, upper driving wheel; 148, lower belt; 149, upper belt; 15, anti-roll assembly; 151, connecting rod; 152, extension rod; 153, inner slide; 154, outer slide; 155, slot; 156, guide slot;

[0037] 2. Pressure vessel body. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0039] like Figures 1 to 12 As shown, the present invention provides an auxiliary device for circumferential seam welding of a large pressure vessel, comprising two welding auxiliary devices 1, a connecting assembly 11 is arranged between the two welding auxiliary devices 1, a guide transmission assembly 12 is arranged between the two welding auxiliary devices 1, a supporting assembly 13 is arranged outside the two welding auxiliary devices 1, and receiving assemblies 14 are arranged on both sides of the top of the two welding auxiliary devices 1;

[0040] The connecting assembly 11 includes a threaded shaft 112 disposed on the inner wall of the welding auxiliary device 1;

[0041] The support assembly 13 includes two groups of upper slides 131 arranged on both sides of the outer wall of the welding auxiliary equipment 1, and the outer wall on one side of each upper slide 131 is rotatably connected to an upper rotating rod 132, and the other end of the upper rotating rod 132 is rotatably connected to a lower slide seat 133, and a support plate 135 is slidably provided at the bottom end of the lower slide seat 133, and the outer wall on one side of the welding auxiliary equipment 1 is rotatably connected to a lower rotating rod 134 rotatably connected to the support plate 135, and the lower rotating rod 134 is rotatably connected to the upper rotating rod 132;

[0042] The receiving assembly 14 includes a lower fixing seat 142, and a pressure vessel body 2 is disposed on the top of the plurality of lower fixing seats 142;

[0043] A connecting motor 111 is provided on one side of one of the welding auxiliary devices 1, one end of the threaded shaft 112 is in the shape of a bare rod, and the end of the threaded shaft 112 in the shape of a bare rod is rotatably connected to the inner wall of one of the welding auxiliary devices 1, the other end of the threaded shaft 112 is in the shape of a thread, and the end of the threaded shaft 112 in the shape of a thread is rotatably connected to the inner wall of another welding auxiliary device 1, and a threaded hole 113 matching the threaded shaft 112 is provided on the outer wall of the other welding auxiliary device 1, the connecting motor 111 and the threaded shaft 112 are connected through a coupling, the guide transmission assembly 12 includes a telescopic sleeve 125, and the telescopic sleeve 125 is fixedly connected to one of the welding auxiliary devices 1, and a plug-in rod 121 is slidably provided on the inner wall of the telescopic sleeve 125, and the plug-in rod 121 is plugged into the other welding auxiliary device Inside the auxiliary device 1, a return spring 126 is sleeved on the outer wall of the plug rod 121, and the return spring 126 is located inside the telescopic sleeve 125. One end of the return spring 126 is fixedly connected to the plug rod 121, and the other end of the return spring 126 is fixedly connected to the inner wall of the telescopic sleeve 125. A blocking disk 123 is fixed to the outer wall of the plug rod 121, and a plug hole 122 matching one end of the plug rod 121 is provided on the outer wall of another welding auxiliary device 1. A blocking groove 124 matching the blocking disk 123 is provided on the outer wall of another welding auxiliary device 1, and a first magnetic block 127 is fixed to the other end of the plug rod 121. A second magnetic block 128 in contact with the first magnetic block 127 is provided on the inner wall of the welding auxiliary device 1, and the second magnetic block 128 is in contact with the welding auxiliary device 1. The inner wall of the device 1 is slidably connected, a connecting rod 129 is fixed on the other side of the second magnetic block 128, and the connecting rod 129 is fixedly connected to the upper slide seat 131, and a magnetic abutment rod in contact with one end of the plug-in rod 121 is slidably provided on the inner wall of another welding auxiliary device 1, and a group of guide transmission components 12 are fixed on the other side of the magnetic abutment rod, a pair of mutually adsorbed magnetic blocks are arranged between one end of the plug-in rod 121 and the magnetic abutment rod, a lower sliding groove matching the lower slide seat 133 is provided on the top of the support plate 135, an upper sliding groove matching the upper slide seat 131 is provided on the outer wall of the welding auxiliary device 1, the upper rotating rod 132 and the lower rotating rod 134 are cross-arranged, a wear-resistant plate 136 is provided on the bottom end of the support plate 135, and an anti-roll component 15 extending to the outside thereof is arranged inside the welding auxiliary device 1. The anti-roll assembly 15 includes a connecting rod 151 rotatably connected to the outer wall of one side of the upper baffle 143, and the other end of the connecting rod 151 is rotatably connected to an extension rod 152 slidably connected to the top of the receiving seat 141. An inner slide 153 is fixed to the bottom of the extension rod 152, and outer slides 154 are slidably provided on the outer walls of both sides of the inner slide 153. The outer slide 154 is slidably connected to the inner wall of the welding auxiliary equipment 1, and the bottom end of the outer slide 154 is fixedly connected to the top of the connecting rod 129. The inner wall of the outer slide 154 is provided with a plurality of slots 155 matching the inner slide 153, and the plurality of slots 155 are equidistantly distributed. The inner wall of the outer slide 154 is provided with a plurality of corresponding guide grooves 156 below the plurality of slots 155, and a plurality of transfer wheels are installed at the bottom of the welding auxiliary equipment 1.The distance between two adjacent lower fixing seats 142 is less than the outer diameter of the pressure vessel body 2.

[0044] When it is necessary to weld two pressure vessel bodies 2, the pressure vessel bodies 2 can be lifted by lifting equipment and placed between multiple groups of lower fixed seats 142. At the same time, under the action of torsion spring 144, the upper baffle 143 can be pushed to rotate around the contact position with the lower fixed seat 142, and the upper baffle 143 can be tightly attached to the outer wall of the pressure vessel body 2. At the same time, the rotation of the upper baffle 143 can drive the connecting rotating rod 151 rotatably connected to it to rotate, and rotate around the contact position with the extension rod 152, and then drive the inner slide 153 fixedly connected to the extension rod 152 to slide left and right. At this time, the threaded shaft 112 can be driven to rotate by starting the connecting motor 111. At this time, the threaded shaft 112 rotates to the inside of the threaded hole 113, and one group of welding auxiliary equipment 1 can pull the other group of welding auxiliary equipment 1 to slide, so that the two groups of pressure vessel bodies 2 gradually approach each other and the two groups of pressure vessel bodies 2 are in the circumferential seam welding position.

[0045] When the two sets of welding auxiliary equipment 1 are close together, one end of the plug rod 121 can be plugged into the inside of the plug hole 122. When the outer wall of the blocking plate 123 is close to the inner wall of the blocking groove 124, the plug rod 121 can be prevented from sliding continuously. At this time, the plug rod 121 slides on the inner wall of the telescopic sleeve 125 and compresses the reset spring 126. At this time, the first magnetic block 127 fixedly connected to the plug rod 121 pushes the second magnetic block 128 to slide, so that the second magnetic block 128 can slide downward, thereby The movable connecting rod 129 slides downward, and the sliding of the connecting rod 129 can drive the upper slide seat 131 to slide, and then the upper rotating rod 132 rotatably connected to the upper slide seat 131 can be pushed to rotate around the contact position with the lower slide seat 133. At this time, the lower slide seat 133 can slide on the top of the support plate 135 under the push of the upper rotating rod 132. Since one end of the lower rotating rod 134 is rotatably connected to the top of the support plate 135, and the other end is rotatably connected to the outer wall of the welding auxiliary equipment 1, the support plate 13 5 is flipped over, and the bottom end of the support plate 135 contacts the ground, which can play a supporting role. At the same time, the up and down sliding of the connecting rod 129 can drive the outer slide 154 fixedly connected to the connecting rod 129 to slide. When the top of the inner slide 153 contacts the guide groove 156 opened inside the outer slide 154, the inner slide 153 can slide along the inclined surface of the guide groove 156 and finally be plugged into the inside of the card slot 155, which can play a limiting purpose. At this time, the upper baffle 143 no longer rotates. The multiple groups of upper baffles 143 can limit the outer walls of both sides of the pressure vessel body 2 to prevent the pressure vessel body 2 from rolling down and causing injuries to the operator. When one end of the plug-in rod 121 is plugged into the plug-in hole 122, the two plug-in rods 121 can push the two magnetic abutment rods to slide. At this time, the two magnetic abutment rods can slide in the same direction on the inner wall of another welding auxiliary equipment 1 at the same time, and with the cooperation of another group of guide transmission components 12, another group of support plates 135 contacts the ground.

[0046] In this embodiment, the receiving assembly 14 includes two pairs of receiving seats 141 fixed to the top of the welding auxiliary equipment 1, and the lower fixed seat 142 is fixed to the top of the receiving seat 141, one end of the lower fixed seat 142 is rotatably provided with an upper baffle 143, and a torsion spring 144 is fixed between the lower fixed seat 142 and the upper baffle 143, the inner wall of the lower fixed seat 142 is rotatably provided with a lower driving wheel 145 extending to the outside thereof, the inner wall of the upper baffle 143 is rotatably connected with an upper driving wheel 147 extending to the outside thereof, and the bottom of the outer wall of the pressure vessel body 2 is connected to the upper baffle 143. The tops of the two groups of lower driving wheels 145 are in contact, the outer walls on both sides of the pressure vessel body 2 are in contact with the outer walls of the two groups of upper driving wheels 147, the inner wall of the lower fixed seat 142 is rotatably connected with a pulley 146 extending to the inner wall of the upper baffle 143, the lower driving wheel 145 and the pulley 146 are commonly wound with a lower belt 148, the upper driving wheel 147 and the pulley 146 are commonly wound with an upper belt 149, the outer wall of the lower fixed seat 142 is installed with a secondary motor body, and the secondary motor body and the lower driving wheel 145 are connected by a coupling.

[0047] When welding two pressure vessel bodies 2, the secondary motor body can be started to drive the lower drive wheel 145 to rotate. At this time, the pulley 146 can be driven to rotate under the connection of the lower belt 148, and then the upper drive wheel 147 can be driven to rotate under the connection of the upper belt 149. At this time, the upper drive wheel 147 and the lower drive wheel 145 rotate at the same time. The simultaneous rotation of multiple sets of drive wheels can drive the pressure vessel body 2 to rotate, and the pressure vessel body 2 can be spot welded.

[0048] The working principle of the device is as follows: the pressure vessel body 2 can be lifted by a lifting device and placed between multiple groups of lower fixing seats 142 arranged at the top of the welding auxiliary equipment 1. With the cooperation of the torsion spring 144, the upper baffle 143 can be tightly attached to the outer wall of the pressure vessel body 2. At this time, the connecting motor 111 can be started to drive the threaded shaft 112 to rotate, so that the two groups of pressure vessel bodies 2 gradually approach each other and are in the annular seam welding position. At this time, with the cooperation of the guide transmission component 12 and the support component 13, the bottom end of the support plate 135 can be in contact with the ground, playing a supporting role. When one end of the plug-in rod 121 is plugged into the inside of the plug-in hole 122, the two plug-in rods 121 can push the two magnetic suction rods to slide, and with the cooperation of another group of guide transmission components 12, the other group of support plates 135 can be in contact with the ground. At the same time, with the cooperation of the guide transmission component 12, the connecting rod 129 can be driven to slide up and down, and then with the cooperation of the anti-roll component 15, the inner slide 153 and the outer slide 154 can be engaged to achieve the purpose of limiting. At this time, the upper baffle 143 no longer rotates, and multiple groups of upper baffles 143 can limit the outer walls on both sides of the pressure vessel body 2. At this time, welding equipment can be used to weld the annular seam. In this process, the secondary motor body can be started, and then the lower drive wheel 145 can be driven to rotate. Under the connection of the lower belt 148, the pulley 146 and the upper belt 149, the upper drive wheel 147 can be driven to rotate. At this time, the upper drive wheel 147 and the lower drive wheel 145 rotate at the same time, and multiple groups of drive wheels rotate in the same direction at the same time, which can drive the pressure vessel body 2 to rotate, and the pressure vessel body 2 can be spot welded.

[0049] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. An auxiliary device for circumferential seam welding of a large pressure vessel, comprising two welding auxiliary devices (1), characterized in that: A connecting assembly (11) is provided between the two welding auxiliary devices (1), a guiding transmission assembly (12) is provided between the two welding auxiliary devices (1), a supporting assembly (13) is provided outside the two welding auxiliary devices (1), and receiving assemblies (14) are provided on both sides of the top ends of the two welding auxiliary devices (1); The connection assembly (11) comprises a threaded shaft (112) arranged on the inner wall of the welding auxiliary equipment (1); The support assembly (13) comprises two groups of upper slide seats (131) arranged on both sides of the outer wall of the welding auxiliary equipment (1), one side outer wall of each upper slide seat (131) is rotatably connected to an upper rotating rod (132), the other end of the upper rotating rod (132) is rotatably connected to a lower sliding seat (133), the bottom end of the lower sliding seat (133) is slidably connected to a support plate (135), one side outer wall of the welding auxiliary equipment (1) is rotatably connected to a lower rotating rod (134) rotatably connected to the support plate (135), and the lower rotating rod (134) is rotatably connected to the upper rotating rod (132); The receiving assembly (14) comprises a lower fixing seat (142), and a plurality of the lower fixing seats (142) are provided with a pressure container body (2) at the top end thereof; The guide transmission assembly (12) comprises a telescopic sleeve (125), and the telescopic sleeve (125) is fixedly connected to one of the welding auxiliary devices (1); a plug-in rod (121) is slidably disposed on the inner wall of the telescopic sleeve (125), and the plug-in rod (121) is plugged into the inside of the other welding auxiliary device (1); a return spring (126) is sleeved on the outer wall of the plug-in rod (121); the return spring (126) is located inside the telescopic sleeve (125); one end of the return spring (126) is fixedly connected to the plug-in rod (121); the other end of the return spring (126) is fixedly connected to the inner wall of the telescopic sleeve (125); a blocking disk (123) is fixedly disposed on the outer wall of the plug-in rod (121); and a plug-in hole (122) matching one end of the plug-in rod (121) is disposed on the outer wall of the other welding auxiliary device (1). , another welding auxiliary device (1) is provided with a blocking groove (124) matching the blocking disk (123) on its outer wall, a first magnetic block (127) is fixed to the other end of the plug-in rod (121), a second magnetic block (128) in contact with the first magnetic block (127) is provided on the inner wall of the welding auxiliary device (1), and the second magnetic block (128) is slidably connected to the inner wall of the welding auxiliary device (1), a connecting rod (129) is fixed to the other side of the second magnetic block (128), and the connecting rod (129) is fixedly connected to the upper slide seat (131), another welding auxiliary device (1) is slidably provided with a magnetic abutment rod in contact with one end of the plug-in rod (121) on its inner wall, and a group of guide transmission components (12) is fixed to the other side of the magnetic abutment rod, and a pair of mutually attracted magnetic blocks are provided between one end of the plug-in rod (121) and the magnetic abutment rod.

2. The auxiliary device for large pressure vessel circumferential seam welding according to claim 1 is characterized in that: One side of one of the welding auxiliary devices (1) is provided with a connecting motor (111); one end of the threaded shaft (112) is in the shape of a bare rod, and the end of the threaded shaft (112) in the shape of a bare rod is rotatably connected to the inner wall of one of the welding auxiliary devices (1); the other end of the threaded shaft (112) is in the shape of a thread, and the end of the threaded shaft (112) in the shape of a thread is rotatably connected to the inner wall of another welding auxiliary device (1); a threaded hole (113) matching the threaded shaft (112) is provided on the outer wall of the other welding auxiliary device (1); and the connecting motor (111) and the threaded shaft (112) are connected via a coupling.

3. The auxiliary device for large pressure vessel circumferential seam welding according to claim 1, characterized in that: The top of the support plate (135) is provided with a sliding groove matching the lower sliding seat (133), the outer wall of the welding auxiliary equipment (1) is provided with an upper sliding groove matching the upper sliding seat (131), the upper rotating rod (132) and the lower rotating rod (134) are cross-arranged, and the bottom of the support plate (135) is provided with a wear-resistant plate (136).

4. The auxiliary device for large pressure vessel circumferential seam welding according to claim 1, characterized in that: The receiving assembly (14) comprises two pairs of receiving seats (141) fixed to the top of the welding auxiliary equipment (1), and a lower fixed seat (142) is fixed to the top of the receiving seat (141); an upper baffle (143) is rotatably provided at one end of the lower fixed seat (142), and a torsion spring (144) is fixed between the lower fixed seat (142) and the upper baffle (143); a lower driving wheel (145) is rotatably provided on the inner wall of the lower fixed seat (142) and extends to the outside thereof; an upper driving wheel (147) is rotatably connected to the inner wall of the upper baffle (143) and extends to the outside thereof; the bottom of the outer wall of the pressure vessel body (2) contacts the top of the two groups of lower driving wheels (145), and the outer walls on both sides of the pressure vessel body (2) contact the outer walls of the two groups of upper driving wheels (147).

5. The auxiliary device for large pressure vessel circumferential seam welding according to claim 4 is characterized in that: The inner wall of the lower fixed seat (142) is rotatably connected to a pulley (146) extending to the inner wall of the upper baffle (143); a lower belt (148) is wound around the lower driving wheel (145) and the pulley (146); and an upper belt (149) is wound around the upper driving wheel (147) and the pulley (146).

6. The auxiliary device for large pressure vessel circumferential seam welding according to claim 4, characterized in that: The welding auxiliary equipment (1) is provided with an anti-roll assembly (15) extending to the outside thereof, the anti-roll assembly (15) comprising a connecting rod (151) rotatably connected to the outer wall of one side of the upper baffle (143), the other end of the connecting rod (151) is rotatably connected to an extension rod (152) slidably connected to the top of the receiving seat (141), the bottom of the extension rod (152) is fixed with an inner slide table (153), and the outer walls on both sides of the inner slide table (153) are slidably connected to the outer wall of the upper baffle (143). A slide (154), wherein the outer slide (154) is slidably connected to the inner wall of the welding auxiliary equipment (1), and the bottom end of the outer slide (154) is fixedly connected to the top end of the connecting rod (129), the inner wall of the outer slide (154) is provided with a plurality of slots (155) matching the inner slide (153), and the plurality of slots (155) are equidistantly distributed, and the inner wall of the outer slide (154) is provided with a plurality of corresponding guide slots (156) located below the plurality of slots (155).

7. The auxiliary device for large pressure vessel circumferential seam welding according to claim 1, characterized in that: A plurality of transfer wheels are installed at the bottom end of the welding auxiliary equipment (1).

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