A pulse arc welding device of a tube plate automatic forming machine tool for shell-and-tube heat exchanger

Abstract

The present application relates to the technical field of pulse arc welding, and discloses a pulse arc welding device of a tube-shell heat exchanger tube plate automatic forming machine tool, which comprises a machine tool frame, a motor module sliding frame is installed on the machine tool frame, a heat exchanger tube body is placed on one side of the machine tool frame, a positioning assembly is arranged on the motor module sliding frame, two groups of adjusting assemblies are arranged on one side of the positioning assembly, an adjusting assembly is arranged on the other side of the positioning assembly, an arc welding gun is arranged on the upper side of the adjusting assembly, and the positioning assembly comprises a hollow rod which is fixedly arranged at one end of a movable component of the motor module sliding frame. The pulse arc welding device of the tube-shell heat exchanger tube plate automatic forming machine tool is positioned in a welded circular tube by rollers, so that the offset during welding is avoided, and the circular tubes to be welded in each group of motor module sliding frames are kept consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulse arc welding, in particular to a pulse arc welding device of a tube plate automatic forming machine tool of a shell-and-tube heat exchanger. BACKGROUND

[0002] The tube plate of a shell-and-tube heat exchanger is widely used in chemical, petroleum, power and pharmaceutical industries, such as condensers, heaters in chemical production, condensers in power stations, heat exchangers in pharmaceutical equipment, etc., and is a key component for realizing heat exchange between cold and hot fluids. In the process of welding the tube plate, the heat exchange tubes usually need to be inserted one by one, but it is difficult to align and keep flat. In the past, manual adjustment not only has low efficiency, but also is difficult to ensure the consistency of the flatness of multiple tubes. Moreover, the heat exchange tubes lack limiting during welding, and under the influence of arc impact force and air flow force, the heat exchange tubes are prone to deviate during welding, thereby increasing the adjustment difficulty. SUMMARY

[0003] The main purpose of the present application is to provide a pulse arc welding device of a tube plate automatic forming machine tool of a shell-and-tube heat exchanger, which can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] A pulse arc welding device of a tube plate automatic forming machine tool of a shell-and-tube heat exchanger, comprising a machine tool frame, an electric module sliding table frame is installed on the machine tool frame, a heat exchanger tube body is placed on one side of the machine tool frame, a positioning assembly is arranged on the electric module sliding table frame, two sets of adjusting assemblies are arranged on one side of the positioning assembly, an adjusting assembly is arranged on the other side of the positioning assembly, an arc welding gun is arranged on the upper side of the adjusting assembly, the positioning assembly comprises a hollow rod fixedly arranged at one end of a movable component of the electric module sliding table frame, a control rod is movably arranged in the hollow rod, two sets of fixed rings are fixedly arranged on the outer side of the control rod close to the adjusting assemblies, a first bevel gear is fixedly arranged on the outer side of the control rod close to the fixed rings, a connecting sleeve is movably sleeved on the outer side of the control rod between the fixed rings, a Z-shaped piece is fixedly arranged on the upper end of the connecting sleeve, a gas cylinder is fixedly installed on the upper end of the hollow rod, sliding openings are formed in the hollow rod on the positions corresponding to the connecting sleeve and the Z-shaped piece on the front and rear sides and the upper side, a positioning cylinder is fixedly arranged at one end of the hollow rod, a double-cone block is fixedly arranged at one end of the control rod close to the inside of the positioning cylinder, three sets of U-shaped frames are slidably arranged on the inside of the positioning cylinder, a wheel frame is fixedly arranged at the middle position of the U-shaped frame, two sets of rollers are rotatably arranged on the upper side of the wheel frame, and limiting strips are slidably arranged on both sides of the U-shaped frame.

[0006] Preferably, the adjustment assembly includes a sliding sleeve movably mounted on the connecting sleeve. A round shaft is fixedly mounted at the connection between the sliding sleeve and the connecting sleeve. A first gear is fixedly mounted at both the upper and lower ends of the round shaft. Two sets of trapezoidal blocks are fixedly mounted on the outer side of the first gear. Slide rails are fixedly mounted on the upper and lower sides of the hollow rod near the sliding port. A rack is partially fixedly mounted on the slide rail. A movable block is slidably mounted inside the sliding sleeve. An adjusting shaft is threadedly connected to one side of the movable block. A threaded cylinder is threadedly connected to the other side of the movable block. A slide rod is slidably mounted inside the threaded cylinder. A push seat is fixedly mounted on both the front and rear sides of one end of the connecting sleeve near the control rod. A movable rod is movably mounted inside the push seat. A universal joint is fixedly installed between one end of the movable rod and the slide rod. A second bevel gear is fixedly mounted on the other end of the movable rod. A spring is fixedly mounted on the outer side of the movable rod between the push seat and the second bevel gear.

[0007] Preferably, the adjusting assembly includes two sets of limiting rings fixedly disposed on the outside of the hollow rod. Two sets of circular sleeves are disposed on the outside and upper side of the hollow rod. A second gear is fixedly disposed at one end of the lower set of the two sets of circular sleeves. A fixed shaft is fixedly disposed at the corresponding end of each of the two sets of circular sleeves. A sliding frame is fixedly disposed on one side of each of the two sets of fixed shafts. A movable shaft is slidably disposed on the inner side of each of the two sets of sliding frames. A fixing block is fixedly disposed on the lower set of the two sets of fixed shafts and the lower set of the two sets of movable shafts. A threaded rod is movably disposed on the inner side of each of the two sets of fixing blocks. A scissor linkage connects the two sets of fixed shafts and movable shafts. A groove is formed on the side of the hollow rod near the circular sleeve. A fixing sleeve is fixedly disposed on the inner wall of one side of the groove. A motor is fixedly mounted on the movable part of the electric module slide frame. Synchronous pulleys are disposed on the outer side of the motor rotating shaft and the fixing sleeve. A synchronous belt is sleeved on the outer side of the two sets of synchronous pulleys. A third gear is fixedly disposed at one end of the motor rotating shaft.

[0008] Preferably, the fixing ring on the outside of the control rod is adapted to the internal cavity of the hollow rod, the connecting sleeve passes through the front and rear sliding ports and the Z-shaped piece passes through the upper sliding port, the cylinder telescopic rod is fixedly connected to the Z-shaped piece, the upper set of the three sets of sliding ports is shorter, the double cone block is slidably set in the positioning cylinder, and the limiting strip is fixedly connected to the positioning cylinder.

[0009] Preferably, the circular shaft and the connecting sleeve are rotatably configured, the outer side of the first gear is configured with a partial tooth block, the two sets of trapezoidal blocks are at ninety degrees, one of the two sets of trapezoidal blocks is fitted with the slide bar, the slide bar has movable openings on both sides near the rack, and the rack is adapted to the tooth block on the first gear.

[0010] Preferably, the second bevel gear meshes with the first bevel gear, and the size of the universal joint connection port structure is such that the position of the sliding rod changes when it rotates 90 degrees and contacts the push seat to pull the movable rod.

[0011] Preferably, the second gear is sleeved outside the hollow rod and located between the two groups of limiting rings, the movable shaft is clamped inside the sliding frame, the fixed block on the fixed shaft is movably connected with the threaded rod, and the fixed block on the movable shaft is threadedly connected with the threaded rod.

[0012] Preferably, the scissors link is cross arranged, the synchronous wheels in the grooves are rotationally arranged in the fixed sleeve and slidably connected with the control rods, the other group of the synchronous wheels is fixedly arranged with the rotating shaft of the motor, and the third gear is meshingly arranged with the second gear.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. The electric arc welding gun is moved by the electric module sliding frame, the positioning cylinder is inserted into the circular pipe to be welded inside the electric module sliding frame, the Z-shaped piece and the connecting sleeve are pushed to slide in the hollow rod by the cylinder, at this time, the connecting sleeve controls the two sides of the adjusting assembly to expand, the double-cone blocks are moved away from the lower side of the U-shaped frame, and the three groups of U-shaped frames are retracted to the center of the circular pipe and into the positioning cylinder, but after the adjusting assembly is adjusted, the cylinder pulls back the double-cone blocks to push out the three groups of U-shaped frames, and the rollers are supported in the welding circular pipe to position it and avoid deviation during welding.

[0015] 2. The synchronous wheels, the third gear connected with the motor are rotated, the meshed second gear and the circular sleeve are rotated by the rotating third gear, the upper circular sleeve and the electric arc welding gun are rotated, the welding work is performed by the electric arc welding gun, before the work, the fixed block and the movable shaft in the sliding frame are driven to slide by screwing the threaded rod, the upper circular sleeve and the electric arc welding gun are lifted by the scissors link, the distance between the two groups of circular sleeves is adjusted, so that the circular pipes of different specifications to be welded are adapted, at the same time, the rotating synchronous wheels drive the synchronous belt to rotate the lower synchronous wheels, the slidingly connected control rods are rotated, so that the driving and adjusting work of the two sides of the adjusting assembly are realized.

[0016] 3. Before the cylinder is pushed, the distance in the movable block is removed by screwing the adjusting shaft, the length of the circular pipe to be welded is adapted, the second bevel gear is rotated by the control rod and the connecting sleeve, the sliding rod drives the threaded cylinder to rotate, the movable blocks on both sides are driven to slide in the sliding sleeve, the two sides of the adjusting shaft are driven to approach or move away, and the distance between the different welding circular pipes is adapted.

[0017] 4, When the connecting sleeve drives the two side sliding sleeves to move, the trapezoidal blocks are attached to the sliding bar to move, keeping the sliding sleeve state during the movement, the two side sliding sleeves will push the round pipe to move until the adjusting shaft is on the heat exchanger pipe body shell, keeping the round pipes in each group of electric module sliding rack consistent, when the cylinder pulls back the double cone blocks, the three groups of U-shaped frames are supported, the round pipes in the electric module sliding rack are positioned, the connecting sleeve and the two groups of sliding sleeves are moved back, the first gear is engaged with the rack, the other trapezoidal block is attached to the sliding bar to slide, the sliding sleeve rotates by 90 degrees, the two side sliding sleeves are folded to keep the state, the sliding rod first contacts the push seat, when rotating by 90 degrees, the universal joint pulls the movable rod, the second bevel gear extrudes the spring, so that the second bevel gear is separated from the first bevel gear, avoiding the motor driving control rod from rotating to adjust the distance between the two side adjusting shafts again. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application;

[0019] Figure 2 It is a welding position structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application;

[0020] Figure 3 It is a local structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 1 ;

[0021] Figure 4 It is a local structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 2 ;

[0022] Figure 5 It is a local positioning assembly and adjusting assembly structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 1 ;

[0023] Figure 6 It is a local positioning assembly and adjusting assembly structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 2 ;

[0024] Figure 7 It is an A part enlarged structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 5 ;

[0025] Figure 8 It is a B part enlarged structure schematic view of the pulse arc welding device of the tube shell type heat exchanger tube plate automatic forming machine tool of the application Figure 6Amplification structure schematic view of middle B part

[0026] Figure 9 Structure schematic of partial adjustment assembly of pulse arc welding device of automatic forming machine tool for tube plate of shell-and-tube heat exchanger Figure 1 ;

[0027] Figure 10 Structure schematic of partial adjustment assembly of pulse arc welding device of automatic forming machine tool for tube plate of shell-and-tube heat exchanger Figure 2 .

[0028] In the figure: 1, machine tool frame; 2, electric module sliding table frame; 3, heat exchanger tube body; 4, positioning assembly; 41, hollow rod; 42, control rod; 43, fixed ring; 44, first bevel gear; 45, connecting sleeve; 46, Z-shaped piece; 47, air cylinder; 48, sliding port; 49, positioning cylinder; 410, double conical block; 411, U-shaped frame; 412, wheel frame; 413, roller; 414, limiting strip; 5, adjustment assembly; 51, sliding sleeve; 52, round shaft; 53, first gear; 54, trapezoidal block; 55, sliding bar; 56, rack; 57, movable block; 58, adjustment shaft; 59, threaded cylinder; 510, sliding rod; 511, push seat; 512, movable rod; 513, second bevel gear; 514, spring; 515, universal joint; 6, adjustment assembly; 61, limiting ring; 62, round sleeve; 63, second gear; 64, fixed shaft; 65, sliding frame; 66, movable shaft; 67, fixed block; 68, threaded rod; 69, scissor link; 610, groove; 611, fixed sleeve; 612, motor; 613, synchronous wheel; 614, synchronous belt; 615, third gear; 7, arc welding gun. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the relative positional relationship of the orientation or position, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0031] Please refer to Figures 1-10The application provides a kind of pulse arc welding device of tube plate automatic forming machine tool of shell-and-tube heat exchanger, including machine tool frame 1, electric module sliding table frame 2 is installed on machine tool frame 1, heat exchanger tube main body 3 is placed on one side of machine tool frame 1, positioning assembly 4 is provided on electric module sliding table frame 2, two sets of adjusting assembly 5 are provided on one side of positioning assembly 4, adjusting assembly 6 is provided on the other side of positioning assembly 4, arc welding gun 7 is provided on the upper side of adjusting assembly 6, positioning assembly 4 includes hollow rod 41 fixedly arranged in the movable part one end of electric module sliding table frame 2, control rod 42 is movably arranged in the inside of hollow rod 41, two sets of fixed rings 43 are fixedly arranged on the outside of control rod 42 close to adjusting assembly 5, first bevel gear 44 is fixedly arranged on the outside of control rod 42 close to fixed ring 43, connecting sleeve 45 is movably sleeved on the outside of control rod 42 between fixed ring 43, Z-shaped piece 46 is fixedly arranged on the upper end of connecting sleeve 45, cylinder 47 is fixedly installed on the upper end of hollow rod 41, sliding port 48 is formed in the position corresponding to connecting sleeve 45, Z-shaped piece 46 of hollow rod 41 front and back side and upper side respectively, positioning cylinder 49 is fixedly arranged in one end of hollow rod 41, double taper block 410 is fixedly arranged in one end of control rod 42 close to the inside of positioning cylinder 49, three sets of U-shaped frames 411 are slidably arranged in the inside of positioning cylinder 49, wheel frame 412 is fixedly arranged in the middle position of U-shaped frame 411, two sets of rollers 413 are rotatably arranged on the upper side of wheel frame 412, limiting strips 414 are slidably arranged on the both sides of U-shaped frame 411.

[0032] Fixed ring 43 is arranged on the outside of control rod 42, which is adapted to the cavity in the hollow rod 41, connecting sleeve 45 passes through the front and back sliding ports 48, and Z-shaped piece 46 passes through the upper sliding port 48, the telescopic rod of the cylinder 47 is fixedly connected with the Z-shaped piece 46, the upper one of the three sets of sliding ports 48 is shorter, the double taper block 410 is slidably arranged in the positioning cylinder 49, and the limiting strips 414 are fixedly connected with the positioning cylinder 49.

[0033] The arc welding gun 7 is moved by the electric module sliding table frame 2, the positioning cylinder 49 is inserted into the circular pipe to be welded inside the electric module sliding table frame 2, and then the Z-shaped piece 46 and the connecting sleeve 45 are slid in the hollow rod 41 by the cylinder 47, at this time the connecting sleeve 45 controls the two adjusting assemblies 5 to expand, adjusts the circular pipe to be welded, the double taper block 410 moves away to the lower side of the U-shaped frame 411, and the three sets of U-shaped frames 411 move towards the center of the circle and retract into the positioning cylinder 49, but after the adjustment of the adjusting assembly 5, the cylinder 47 pulls back the double taper block 410 to push out the three sets of U-shaped frames 411, and the rollers 413 are supported in the welding circular pipe to position it and avoid deviation during welding.

[0034] The adjusting assembly 5 comprises a sliding sleeve 51 movably arranged on the connecting sleeve 45, a circular shaft 52 fixedly arranged at the connecting position of the sliding sleeve 51 and the connecting sleeve 45, a first gear 53 fixedly arranged at the upper and lower ends of the circular shaft 52, two groups of trapezoidal blocks 54 fixedly arranged at the outer side of the first gear 53, a sliding bar 55 fixedly arranged at the upper and lower sides of the hollow rod 41 near the sliding opening 48, a gear rack 56 partially fixedly arranged on the sliding bar 55, a movable block 57 slidably arranged in the sliding sleeve 51, an adjusting shaft 58 threadedly connected to one side of the movable block 57, a threaded cylinder 59 threadedly connected to the other side of the movable block 57, a sliding rod 510 slidably arranged in the threaded cylinder 59, a push base 511 movably arranged in the connecting sleeve 45 near the front and rear sides of the control rod 42, a movable rod 512 movably arranged in the push base 511, a universal joint 515 fixedly arranged between one end of the movable rod 512 and the sliding rod 510, a second bevel gear 513 fixedly arranged at the other end of the movable rod 512, and a spring 514 fixedly arranged at the outer side of the movable rod 512 between the push base 511 and the second bevel gear 513.

[0035] The circular shaft 52 is rotatably arranged on the connecting sleeve 45, the outer side of the first gear 53 is partially provided with gear blocks, the two groups of trapezoidal blocks 54 are ninety degrees, one group of the two groups of trapezoidal blocks 54 is arranged in close contact with the sliding bar 55, the sliding bar 55 is provided with a movable opening near the two sides of the gear rack 56, the gear rack 56 is adapted to the gear blocks on the first gear 53, the second bevel gear 513 is meshingly arranged with the first bevel gear 44, and the connecting opening structure of the universal joint 515 meets the position change of the sliding rod 510 rotating ninety degrees and the push base 511 pulling the movable rod 512.

[0036] Before the cylinder 47 is pushed, the length of the pipe to be welded is adjusted by rotating the adjusting shaft 58 to move the movable block 57 out of the distance, the control rod 42 drives the second bevel gear 513 to rotate, the slide rod 510 drives the threaded cylinder 59 to rotate, the movable block 57 on both sides slides in the slide sleeve 51, and the adjusting shaft 58 on both sides is driven to move closer or farther apart to adapt to the distance between different welded pipes. In addition, when the connecting sleeve 45 drives the slide sleeve 51 on both sides to move, the trapezoidal block 54 is attached to the slide bar 55 to move and keep the slide sleeve 51 in the same state. The slide sleeve 51 on both sides pushes the pipe to move until the adjusting shaft 58 is in contact with the outer shell of the heat exchanger pipe body 3, and the pipes to be welded in each electric module sliding rack 2 are kept in the same state. When the cylinder 47 pulls back the double-cone block 410, the three groups of U-shaped frames 411 are lifted, the pipes to be welded in the electric module sliding rack 2 are positioned, and the connecting sleeve 45 and the two groups of slide sleeves 51 are moved back. The first gear 53 is engaged with the rack 56, so that the trapezoidal block 54 on the other side is attached to the slide bar 55 to slide, the slide sleeve 51 rotates by 90 degrees, and the slide sleeve 51 on both sides is folded to keep the state. The slide rod 510 first contacts the push seat 511, and when it rotates by 90 degrees, the universal joint 515 pulls the movable rod 512 and the second bevel gear 513 to press the spring 514, so that the second bevel gear 513 is separated from the first bevel gear 44, and the distance between the two adjusting shafts 58 is adjusted again when the motor 612 drives the control rod 42 to rotate.

[0037] The adjusting assembly 6 comprises two groups of limiting rings 61 fixedly arranged outside the hollow rod 41. The outer side of the hollow rod 41 is provided with two groups of circular sleeves 62 on the upper side. One end of the lower group of the two groups of circular sleeves 62 is fixedly provided with a second gear 63. The corresponding end of the two groups of circular sleeves 62 is fixedly provided with a fixed shaft 64. The fixed shaft 64 on one side is fixedly provided with a slide frame 65. The slide frame 65 on the inner side is slidably provided with a movable shaft 66. The lower group of the two groups of fixed shafts 64 and the lower group of the two groups of movable shafts 66 are fixedly provided with a fixed block 67. The inner side of the two groups of fixed blocks 67 is movably provided with a threaded rod 68. The two groups of fixed shafts 64 and the movable shaft 66 are connected by a scissors linkage 69. The hollow rod 41 is provided with a groove 610 on one side close to the circular sleeve 62. The inner wall of the groove 610 on one side is fixedly provided with a fixed sleeve 611. The movable part of the electric module sliding rack 2 is fixedly provided with a motor 612. The rotating shaft of the motor 612 and the outer side of the fixed sleeve 611 are provided with synchronous wheels 613. The outer side of the two groups of synchronous wheels 613 is sleeved with a synchronous belt 614. One end of the rotating shaft of the motor 612 is fixedly provided with a third gear 615.

[0038] The second gear 63 is sleeved outside the hollow rod 41 between the two sets of limiting rings 61, the movable shaft 66 is clamped inside the sliding frame 65, the fixed block 67 on the fixed shaft 64 is movably connected with the threaded rod 68, the fixed block 67 on the movable shaft 66 is threadedly connected with the threaded rod 68, the scissors connecting rod 69 is cross arranged, the synchronous wheel 613 in the groove 610 is rotatably arranged with the fixed sleeve 611 and is slidably connected with the control rod 42, another set of the synchronous wheel 613 is fixedly arranged with the motor 612, and the third gear 615 is meshingly arranged with the second gear 63.

[0039] The synchronous wheel 613 connected with the motor 612 is driven to rotate, the third gear 615 is driven to rotate, the second gear 63 meshed with the third gear 615 is driven to rotate, the upper sleeve 62 is driven to rotate, the arc welding gun 7 is driven to rotate, the arc welding gun 7 is welded, before work, the threaded rod 68 is screwed to drive the threaded connection of the fixed block 67 and the movable shaft 66 to slide in the sliding frame 65, the scissors connecting rod 69 is used to lift the upper sleeve 62 and the arc welding gun 7, the distance between the two sets of sleeves 62 is adjusted, different specifications of the pipe to be welded are adapted, at the same time, the synchronous belt 614 is driven to rotate by the rotating synchronous wheel 613, the lower synchronous wheel 613 is driven to rotate, the sliding connection of the control rod 42 is rotated, the driving and adjusting work of the two sides of the adjusting assembly 5 are realized.

[0040] Working principle: in use, through the existing electric module slide rack 2 drive arc welding gun 7 to move, the positioning cylinder 49 is inserted into the electric module slide rack 2 inside the pipe needs to be welded, then through the cylinder 47 push Z type 46 and connecting sleeve 45 in the hollow rod 41 sliding, at this time the connecting sleeve 45 will control both sides of the adjustment assembly 5 to expand, adjust the pipe needs to be welded, double taper block 410 leave to U type frame 411 downside, three groups of U type frame 411 will be close to the center of the contraction positioning cylinder 49, but after the adjustment assembly 5 adjustment, cylinder 47 pull back double taper block 410 will push three groups of U type frame 411, the roller 413 will be in the support in the welding pipe, to carry on the positioning, avoid in the process of welding, the situation appears deviation; in addition, through the motor 612 drive connected synchronous wheel 613, third gear 615 rotation, and the rotating third gear 615 drive meshing second gear 63 and round sleeve 62 rotation, drive the upper side of the round sleeve 62 and arc welding gun 7 rotation, by arc welding gun 7 to carry on the welding work, and before work, by screwing the threaded rod 68 drive screw connection fixed block 67 and movable shaft 66 in the sliding frame 65 sliding, by scissors link 69 will be the upper side of the round sleeve 62 and arc welding gun 7 rise, adjust the distance between the two groups of round sleeve 62, so as to adapt to different specifications need to be welded pipe, at the same time, the rotating synchronous wheel 613 drive synchronous belt 614 drive the lower side of the synchronous wheel 613 rotation, so that the sliding connection control rod 42 rotation, thus realize the drive adjustment work of both sides of the adjustment assembly 5; and before the cylinder 47 is pushed, by rotating the adjusting shaft 58 remove the distance in the movable block 57, adapt to the length of the pipe needs to be welded, and control rod 42, connecting sleeve 45 drive second bevel gear 513 rotation, make the slide rod 510 drive screw cylinder 59 rotation, drive both sides of the movable block 57 in the sliding sleeve 51 sliding, drive both sides of the adjusting shaft 58 close or away, adapt to the distance between different welding pipe, in addition, connecting sleeve 45 drive both sides of the sliding sleeve 51 move, trapezoidal block 54 on the slide bar 55 move, keep the sliding sleeve 51 state when moving, both sides of the sliding sleeve 51 will push the pipe to move, until the adjusting shaft 58 on the heat exchanger tube body 3 shell, neat each group of electric module slide rack 2 need to be welded pipe to keep consistent, and when the cylinder 47 pull back double taper block 410, prop up three groups of U type frame 411, when the electric module slide rack 2 welding pipe positioning, connecting sleeve 45 and two groups of sliding sleeve 51 back, first gear 53 and rack 56 mesh, make another trapezoidal block 54 on the slide bar 55 sliding, sliding sleeve 51 rotation ninety degrees, fold both sides of the sliding sleeve 51 keep state, and slide rod 510 first with pusher 511 contact, when ninety degrees rotation, through the universal joint 515 pull the movable rod 512, second bevel gear 513 extrude spring 514, so that the second bevel gear 513 and the first bevel gear 44 disengagement, avoid the motor 612 drive control rod 42 rotation, adjust the distance between both sides of the adjusting shaft 58 again.

[0041] The machine tool frame 1, the electric module sliding frame 2, the heat exchanger tube body 3, the air cylinder 47, the universal joint 515, the scissor link 69, the motor 612, and the electric arc welding gun 7 in the present application belong to the common knowledge in the field, and their working principles are known technologies, and the models are selected according to the actual use, so they will not be explained in detail.

[0042] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pulse arc welding device of an automatic forming machine tool for a tube sheet of a shell-and-tube heat exchanger, comprising a machine tool frame (1), characterized in that: The machine tool frame (1) is provided with an electric module sliding table frame (2), a heat exchanger pipe body (3) is placed on one side of the machine tool frame (1), a positioning assembly (4) is arranged on the electric module sliding table frame (2), two groups of adjusting assemblies (5) are arranged on one side of the positioning assembly (4), an adjusting assembly (6) is arranged on the other side of the positioning assembly (4), an electric arc welding gun (7) is arranged on the upper side of the adjusting assembly (6), the positioning assembly (4) comprises a hollow rod (41) fixedly arranged at one end of a movable component of the electric module sliding table frame (2), a control rod (42) is movably arranged in the hollow rod (41), two groups of fixing rings (43) are fixedly arranged on the outer side of the control rod (42) and close to the adjusting assemblies (5), a first bevel gear (44) is fixedly arranged on the outer side of the control rod (42) and close to the fixing rings (43), a connecting sleeve (45) is movably sleeved on the outer side of the control rod (42) and between the fixing rings (43), a Z-shaped piece (46) is fixedly arranged on the upper end of the connecting sleeve (45), a pneumatic cylinder (47) is fixedly arranged on the upper end of the hollow rod (41), sliding openings (48) are formed in positions corresponding to the connecting sleeve (45) and the Z-shaped piece (46) on the front and rear sides and the upper side of the hollow rod (41), a positioning cylinder (49) is fixedly arranged at one end of the hollow rod (41), a double taper block (410) is fixedly arranged at one end of the control rod (42) and in the interior of the positioning cylinder (49), three groups of U-shaped frames (411) are slidably arranged in the interior of the positioning cylinder (49), a wheel frame (412) is fixedly arranged at the middle position of the U-shaped frame (411), two groups of rollers (413) are rotatably arranged on the upper side of the wheel frame (412), and limiting strips (414) are slidably arranged on the two sides of the U-shaped frame (411). The adjusting assembly (5) comprises a sliding sleeve (51) movably arranged on the connecting sleeve (45), a circular shaft (52) fixedly arranged at the connecting position of the sliding sleeve (51) and the connecting sleeve (45), first gear wheels (53) fixedly arranged at the upper and lower ends of the circular shaft (52), two groups of trapezoidal blocks (54) fixedly arranged at the outer side of the first gear wheels (53), sliding strips (55) fixedly arranged at the outer side of the hollow rod (41) near the upper and lower sides of the sliding opening (48), a gear rack (56) partially fixedly arranged on the sliding strip (55), a movable block (57) slidably arranged in the sliding sleeve (51), an adjusting shaft (58) screw-coupled on one side of the movable block (57), a threaded cylinder (59) screw-coupled on the other side of the movable block (57), a sliding rod (510) slidably arranged in the threaded cylinder (59), push seats (511) fixedly arranged at one end of the connecting sleeve (45) near the front and back sides of the control rod (42), a movable rod (512) movably arranged in the push seat (511), a universal joint (515) fixedly arranged between one end of the movable rod (512) and the sliding rod (510), a second bevel gear (513) fixedly arranged at the other end of the movable rod (512), and springs (514) fixedly arranged at the outer side of the movable rod (512) between the push seat (511) and the second bevel gear (513). The fixed ring (43) arranged at the outer side of the control rod (42) is adapted to the inner cavity of the hollow rod (41), the connecting sleeve (45) passes through the front and back sliding openings (48), and the Z-shaped piece (46) passes through the upper sliding opening (48), the cylinder (47) is fixedly connected with the Z-shaped piece (46), the upper group of the three groups of sliding openings (48) is shorter, the double-cone-shaped block (410) is slidably arranged in the positioning cylinder (49), and the limiting strip (414) is fixedly connected with the positioning cylinder (49). The circular shaft (52) is rotatably arranged with the connecting sleeve (45), the outer side of the first gear wheel (53) is partially provided with a gear block, the two groups of trapezoidal blocks (54) are ninety degrees, one group of the two groups of trapezoidal blocks (54) is arranged in close contact with the sliding strip (55), the sliding strip (55) is provided with a movable opening near the two sides of the gear rack (56), and the gear rack (56) is adapted to the gear block on the first gear wheel (53). The second bevel gear (513) is meshingly arranged with the first bevel gear (44), and the connecting opening structure of the universal joint (515) meets the position change that the sliding rod (510) is rotated by ninety degrees and the push seat (511) is in contact with the movable rod (512).

2. The pulse arc welding device of the automatic forming machine tool for the tube sheet of the shell-and-tube heat exchanger according to claim 1, characterized in that: The adjusting assembly (6) comprises two groups of limiting rings (61) fixed outside a hollow rod (41), the outside of the hollow rod (41) is provided with a round sleeve (62) on the upper side position, one end of a lower group of the two groups of round sleeves (62) is fixedly provided with a second gear (63), one end of the two groups of round sleeves (62) is fixedly provided with a fixed shaft (64), one side of the two groups of fixed shafts (64) is fixedly provided with a sliding frame (65), the inner side of the two groups of sliding frames (65) is slidably provided with a movable shaft (66), the upper side of a lower group of the two groups of fixed shafts (64) and a lower group of the two groups of movable shafts (66) are fixedly provided with a fixed block (67), the inner side of the two groups of fixed blocks (67) is movably provided with a threaded rod (68), the two groups of fixed shafts (64) and movable shafts (66) are connected with a scissor linkage (69), the side of the hollow rod (41) close to the round sleeve (62) is provided with a groove (610), the inner wall of the side of the groove (610) is fixedly provided with a fixed sleeve (611), the movable part of the electric module sliding rack (2) is fixedly provided with a motor (612), the rotating shaft of the motor (612) and the outer side of the fixed sleeve (611) are provided with synchronous wheels (613), the outer side of the two groups of synchronous wheels (613) is sleeved with a synchronous belt (614), one end of the rotating shaft of the motor (612) is fixedly provided with a third gear (615).

3. The pulse arc welding device of the automatic forming machine tool of the tube sheet of the shell-and-tube heat exchanger according to claim 2, characterized in that: The second gear (63) is sleeved outside the hollow rod (41) between the two groups of limiting rings (61), the movable shaft (66) is clamped in the inner side of the sliding frame (65), the fixed block (67) on the fixed shaft (64) is movably connected with the threaded rod (68), the fixed block (67) on the movable shaft (66) is threadedly connected with the threaded rod (68).

4. The pulse arc welding device of the automatic forming machine tool of the tube sheet of the shell-and-tube heat exchanger according to claim 2, characterized in that: The scissor linkage (69) is cross arranged, the synchronous wheels (613) in the groove (610) and the fixed sleeve (611) are rotatably arranged and slidably connected with the control rod (42), the other group of the two groups of synchronous wheels (613) is fixedly arranged with the rotating shaft of the motor (612), the third gear (615) is meshingly arranged with the second gear (63).

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