Automatic welding device for marine boiler tube plate

Abstract

The invention discloses an automatic welding device for a marine boiler tube plate, which mainly relates to the technical field of boiler tube plate welding and comprises a positioning support, a tube barrel conveying belt is arranged on one side of the positioning support, an end cover conveying belt is arranged on the other side of the positioning support, a pipeline clamping jaw is arranged above the tube barrel conveying belt, and a welding gun is slidably arranged above the pipeline clamping jaw. A cover plate clamping jaw is arranged on the end cover conveying belt, a three-face clamp is arranged on the cover plate clamping jaw, and the three-face clamp is used for clamping the marine boiler end cover. The marine boiler end cover and the marine boiler tube barrel can be automatically clamped to be in butt joint and welded.

Description

Technical Field

[0001] The invention mainly relates to the technical field of boiler tube plate welding, and in particular to an automatic welding device for a marine boiler tube plate. Background Art

[0002] Boiler equipment is a kind of equipment for realizing energy conversion and is used in various fields. However, due to its generally large size, the welding time and difficulty can be imagined to be long, and the welding has high requirements on the weld state and quality. If manual welding is used, it will not only be time-consuming and laborious, but also cannot guarantee the stability of welding quality during the welding process. The most important thing is that the boiler tube needs to be fixed manually during welding, and then the end cover of the boiler is aligned on the boiler tube by auxiliary machinery. At this time, the auxiliary machinery cannot be detached, and finally the welding is carried out manually by holding the welding gun and climbing the elevated frame. During docking, due to the large size of the boiler, it is difficult to align it at one time, and it requires multiple workers and multiple angles to direct and participate. After the welding is completed, the fixation of the boiler is manually loosened and the auxiliary machinery is used to transport it away, which makes welding difficult. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the above problems, the present invention needs to provide an automatic welding device for marine boiler tube sheets, which can automatically clamp the marine boiler end cover and the marine boiler tube for docking and welding.

[0004] (II) Technical solution In view of the above technical problems, the present invention provides an automatic welding device for marine boiler tube sheets, comprising a positioning bracket, a tube conveyor belt is provided on one side of the positioning bracket, and an end cover conveyor belt is provided on the other side, a pipe clamp is provided above the tube conveyor belt, and the pipe clamp is used to clamp the marine boiler tube and drive the marine boiler tube to rotate; a welding gun is slidably provided above the pipe clamp; a cover plate clamp is rotatably provided above the end cover conveyor belt, and a three-sided clamp is provided on the cover plate clamp, and the three-sided clamp is used to clamp the marine boiler end cover, and the cover plate clamp is used to drive the marine boiler end cover to move to the marine boiler tube for docking.

[0005] Furthermore, the pipe clamp includes a drive assembly, on which are arranged two groups of axially symmetrical single clamps; the drive assembly includes a tube clamping motor, which is fixedly mounted on a positioning bracket, and a bidirectional screw rod is fixedly connected to the output shaft of the tube clamping motor, on both sides of which are arranged single clamps.

[0006] Further, the single jaw includes a threaded seat which is in threaded fit with the bidirectional lead screw. The threaded seat is slidably mounted on the positioning bracket. A tube barrel clamping frame is slidably arranged on the threaded seat. The tube barrel clamping frame includes a round rod at the bottom. On each side of the round rod, an angular connecting rod is fixedly installed. At the top of the tube barrel clamping frame, a reversing roller shaft is further provided. The reversing roller shaft is rotatably mounted on the angular connecting rod and is fixedly connected to the output shaft of the reversing motor. The tube barrel clamping frame and the reversing roller shaft are used to clamp the marine boiler tube barrel, and the reversing motor is used to drive the marine boiler tube barrel to rotate.

[0007] Further, the welding gun is fixedly installed on the welding ring, and the welding ring is fixedly connected to the movable end of the welding cylinder. The welding gun is also slidably mounted on the positioning bracket.

[0008] Further, the cover plate jaw includes an end cover clamping plate and link assemblies symmetrically arranged on both sides of the end cover clamping plate. The bottom of the end cover clamping plate is a U-shaped plate. On both sides of the top of the U-shaped plate, a grooved plate is fixedly installed. A fixed U-shaped frame is fixedly installed between the grooved plate and the U-shaped plate. The fixed U-shaped frame coincides with the shape of the U-shaped plate. A straight rod protrudes from the U-shaped bottom of the fixed U-shaped frame. A three-sided clamp is arranged below the grooved plate of the end cover clamping plate.

[0009] Further, the link assembly includes a horizontal fixed link which is fixedly installed in the groove of the grooved plate of the end cover clamping plate. An inclined small link is hinged to the middle end of the horizontal fixed link, and an upper parallel link is hinged to the end of the horizontal fixed link. The inclined small link is hinged to the lower large link, and the lower large link is rotatably connected to the auxiliary small link. The auxiliary small link is rotatably mounted on the lower short link, and the lower short link is rotatably mounted on the positioning bracket. The upper parallel link is rotatably connected to the lower short link. An upper long link is also hinged to the hinge point of the auxiliary small link and the lower large link, and the upper long link is rotatably connected to the positioning bracket.

[0010] Further, the three-sided clamp includes a top small rod which is rotatably mounted on the straight rod of the fixed U-shaped frame. An end cover cylinder is fixedly connected to the top small rod. A hinge seat is fixedly arranged at the movable end of the end cover cylinder. A right-side long link is rotatably connected to the hinge seat. The right-side long link is hinged to the right-side rotating rod. The middle of the right-side rotating rod is hinged to a U-shaped end point of the fixed U-shaped frame. A three-pronged rod is also hinged to the hinge seat. The top of the three-pronged rod is hinged to the left-side long link. The left-side long link is rotatably connected to the left-side bent rod. The inflection point of the left-side bent rod is rotatably connected to the other U-shaped end point of the fixed U-shaped frame.

[0011] Further, a rotating roller is rotatably arranged at the end of the left-side bent rod, the end of the right-side rotating rod, and the forked section at the end of the three-pronged rod.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: 1. The present invention is provided with a tube conveyor belt and an end cover conveyor belt, which can automatically transport the marine boiler tubes and the marine boiler end covers, and automatically feed materials, facilitating subsequent automatic welding; 2. The present invention is provided with a driving assembly and two groups of axially symmetric single clamping jaws, which can automatically grab and clamp the marine boiler tubes, lift them close to the welding gun, and can also drive the marine boiler tubes and the marine boiler end covers to rotate during welding, change the connection position to approach the welding gun, so as to change the welding position and achieve full-circle welding; 3. The present invention is provided with a cover plate clamping jaw, which can drive the marine boiler end cover to move and dock it onto the marine boiler tube to form an automatic docking, without the need for multiple manual-assisted mechanical interferences and can be automatically realized; 4. The present invention is provided with a three-sided clamp, which can clamp and grab the marine boiler end cover for fixation, and has the function of automatic grasping, preparing for moving the marine boiler end cover and docking it with the marine boiler tube. The whole of the present invention is carried out manually by remote control or set the program automatically, with a high degree of automated welding mode, improving the welding quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the first angle of the partial welding mechanism of the present invention.

[0015] Figure 3 It is a schematic diagram of the second angle of the partial welding mechanism of the present invention.

[0016] Figure 4 It is a schematic diagram of the installation position of the commutation motor of the present invention.

[0017] Figure 5 It is a schematic diagram of the third angle of the partial welding mechanism of the present invention.

[0018] Figure 6 It is a schematic diagram of the installation position of the rotating roller of the present invention.

[0019] Figure 7 It is a schematic diagram of the fourth angle of the partial welding mechanism of the present invention.

[0020] Figure 8 is Figure 7 the sectional view taken along line A-A in

[0021] Figure 9 It is a schematic diagram of the tube conveyor belt and the end cover conveyor belt of the present invention.

[0022] Figure 10 It is a schematic diagram of the fifth angle of the partial welding mechanism of the present invention.

[0023] Reference numerals in the drawings: 1 - welding mechanism; 2 - end cover of marine boiler; 3 - drum of marine boiler; 101 - drum conveyor belt; 102 - positioning bracket; 103 - end cover conveyor belt; 104 - welding cylinder; 105 - welding ring; 106 - welding gun; 107 - moving motor; 108 - drum clamping frame; 109 - reversing roller shaft; 110 - drum clamping motor; 111 - bidirectional lead screw; 112 - threaded seat; 113 - reversing motor; 114 - upper long connecting rod; 115 - lower short connecting rod; 116 - auxiliary small connecting rod; 117 - upper parallel connecting rod; 118 - lower large connecting rod; 119 - inclined small connecting rod; 120 - horizontal fixed connecting rod; 121 - end cover clamping plate; 122 - rotating roller; 123 - top small rod; 124 - end cover cylinder; 125 - hinge seat; 126 - right long connecting rod; 127 - right rotating rod; 128 - left bent rod; 129 - left long connecting rod; 130 - fixed U-shaped frame; 131 - three-pronged rod. Detailed implementation manners

[0024] The present invention will be further described below in conjunction with specific embodiments. Here, the present invention is explained by means of illustrative embodiments of the present invention, but it is not intended to limit the present invention.

[0025] Embodiment: As Figures 1-10 shown, an automatic welding device for a tube sheet of a marine boiler includes a positioning bracket 102. A groove is formed in the middle of the positioning bracket 102 for installing a pipe gripper. A drum conveyor belt 101 is provided on one side of the T-shaped frame, and an end cover conveyor belt 103 is provided on the other side. A support plate is also inclinedly provided at the top of the positioning bracket 102 for installing a welding gun 106. A groove and a hinge point are also provided on the side close to the end cover conveyor belt 103 for arranging a connecting rod assembly.

[0026] The drum conveyor belt 101 and the end cover conveyor belt 103 are both arranged in a common manner in the prior art. For example, it mainly includes a conveyor belt, two conveyor rollers, and a motor. The two conveyor rollers are both rotatably installed on the positioning bracket 102. The conveyor belt is sleeved on the two conveyor rollers. The output shaft of the motor is fixedly connected to one of the conveyor rollers, and the motor is fixedly installed on the positioning bracket 102. In this way, materials are conveyed by the conveyor belt.

[0027] In the above structure, a groove or a concave structure is provided on the conveyor belt of the drum conveyor belt 101 to prevent the drum 3 of the marine boiler from rolling. An annular plate is provided on the conveyor belt of the end cover conveyor belt 103 for placing the end cover 2 of the marine boiler to prevent rolling.

[0028] The pipe clamp jaw includes a driving component, and two groups of axially symmetric single jaws are arranged on the driving component; the driving component includes a tube clamping motor 110, the tube clamping motor 110 is fixedly installed on the bottom of the positioning bracket 102, and a bidirectional lead screw 111 is fixedly connected to the output shaft of the tube clamping motor 110, and single jaws are arranged on both sides of the bidirectional lead screw 111.

[0029] The single jaw includes a threaded seat 112, the threaded seat 112 is in threaded cooperation with the bidirectional lead screw 111, an opening groove is provided on the threaded seat 112, the threaded seat 112 is slidably installed on the positioning bracket 102, a slide bar can be arranged on the positioning bracket 102 to limit the horizontal sliding of the threaded seat 112, a tube clamping frame 108 is slidably arranged on the threaded seat 112, the tube clamping frame 108 includes a round bar at the bottom, the round bar of the tube clamping frame 108 slides in the opening groove of the threaded seat 112, and an angle connecting rod is fixedly installed on each side of the round bar. A reversing roller shaft 109 is further arranged at the top of the tube clamping frame 108, and both sides of the reversing roller shaft 109 are rotatably installed on the two angle connecting rods. The reversing roller shaft 109 is fixedly connected to the output shaft of the reversing motor 113, and the reversing motor 113 is fixedly installed on the angle connecting rod. The tube clamping frame 108 and the reversing roller shaft 109 are jointly used to clamp the marine boiler tube 3, and the reversing motor 113 is used to drive the marine boiler tube 3 to rotate.

[0030] The welding gun 106 is fixedly installed on the welding ring 105, the welding ring 105 is fixedly connected to the movable end of the welding cylinder 104, the welding cylinder 104 is fixedly installed on the support plate of the positioning bracket 102, and the welding gun 106 is also slidably installed on the positioning bracket 102.

[0031] The cover plate clamp jaw includes an end cover clamping plate 121 and a connecting rod assembly symmetrically arranged on both sides of the end cover clamping plate 121. The bottom of the end cover clamping plate 121 is a U-shaped plate, and a grooved plate is fixedly installed on each side of the top of the U-shaped plate. A fixed U-shaped frame 130 is fixedly installed between the grooved plate and the U-shaped plate. The fixed U-shaped frame 130 coincides with the shape of the U-shaped plate. A straight rod protrudes from the U-shaped bottom of the fixed U-shaped frame 130, and the grooved plates are welded and fixed to the U-shaped plate by a cylinder; a three-sided clamp is arranged below the grooved plate of the end cover clamping plate 121.

[0032] The connecting rod assembly includes a horizontal fixed connecting rod 120, which is fixedly installed in the groove of the grooved plate of the end cover clamping plate 121. The middle end of the horizontal fixed connecting rod 120 is hinged with an inclined small connecting rod 119, and the end of the horizontal fixed connecting rod 120 is hinged with an upper parallel connecting rod 117. The inclined small connecting rod 119 is hinged with a lower large connecting rod 118, and the lower large connecting rod 118 is rotatably connected with an auxiliary small connecting rod 116. The auxiliary small connecting rod 116 is rotatably installed on the lower short connecting rod 115, and the end of the lower short connecting rod 115 is rotatably installed on the positioning bracket 102; The upper parallel connecting rod 117 is rotatably connected with the lower short connecting rod 115. The hinged point of the auxiliary small connecting rod 116 and the lower large connecting rod 118 is also hinged with an upper long connecting rod 114, and the upper long connecting rod 114 is rotatably connected to the positioning bracket 102.

[0033] The lower short connecting rod 115 in the connecting rod assembly close to the welding gun 106 is fixedly connected to the output shaft of the moving motor 107. The moving motor 107 is fixedly installed on the side of the positioning bracket 102, and the moving motor 107 is a forward and reverse motor.

[0034] The three-sided clamp includes a top small rod 123, which is rotatably installed on the straight rod of the fixed U-shaped frame 130. A end cover cylinder 124 is fixedly connected to the top small rod 123. The movable end of the end cover cylinder 124 is fixedly provided with a hinge seat 125. A right-side long connecting rod 126 is rotatably connected to the hinge seat 125. The right-side long connecting rod 126 is hinged to one end of the right-side rotating rod 127. The middle of the right-side rotating rod 127 is hinged to one U-shaped end point of the fixed U-shaped frame 130. There is also a groove on a section of the right-side rotating rod 127 close to the marine boiler end cover 2. In order not to interfere with the fixed U-shaped frame 130, a three-pronged rod 131 is also hinged to the hinge seat 125. The top of the three-pronged rod 131 is hinged to the left-side long connecting rod 129. The left-side long connecting rod 129 is rotatably connected to the left-side bent rod 128. The inflection point of the left-side bent rod 128 is rotatably connected to the other U-shaped end point of the fixed U-shaped frame 130.

[0035] The three-pronged rod 131 is a Y-shaped rod, with one vertical section and two bifurcated sections. The point where the three sections converge is rotatably arranged on the fixed U-shaped frame 130. There is an opening in the middle of the three-pronged rod 131. The purpose of setting the opening is to be able to rotate on the fixed U-shaped frame 130 without interfering with the fixed U-shaped frame 130. Among them, the bifurcated section close to the marine boiler end cover 2 is longer than the bifurcated section far from the marine boiler end cover 2. This setting is to be able to better clamp the marine boiler end cover 2.

[0036] The left-side bent rod 128 is composed of two rods with an included angle, and there is a groove in the middle. The purpose of opening the groove is not to interfere with the fixed U-shaped frame 130. The middle included angle also becomes the turning point, the inflection point.

[0037] At the ends of the left bent rod 128 (the end close to the marine boiler end cover 2), the ends of the right rotating rod 127 (the end close to the marine boiler end cover 2), and the forked section at the end of the three-fork rod 131 (close to the marine boiler end cover 2), a rotating roller 122 is rotatably arranged. The surface of the rotating roller 122 is provided with protrusions. In order to increase the friction force and facilitate clamping the marine boiler end cover 2, the rotating roller 122 is used to clamp the marine boiler end cover 2 and assist the rotation during the welding of the marine boiler end cover 2 and the marine boiler tube barrel 3.

[0038] The working principle of the present invention: First, place the marine boiler end cover 2 in the annular plate of the end cover conveyor belt 103, and place the marine boiler tube barrel 3 in the groove of the tube barrel conveyor belt 101, and transport it to the position of the welding gun 106 close to the marine boiler end cover 2. After reaching the position, stop moving. Start the tube barrel clamping motor 110 to drive the bidirectional lead screw 111 to rotate, so that the threaded seats 112 move away from each other, so that the two sides of the tube barrel clamping frames 108 approach each other, clamp and lift the marine boiler tube barrel 3 for use.

[0039] In the initial state, the horizontal fixed connecting rod 120 is close to the welding gun 106. At this time, start the moving motor 107 to drive the lower short connecting rod 115 to rotate. The lower short connecting rod 115 drives the upper long connecting rod 114, the auxiliary small connecting rod 116, the upper parallel connecting rod 117, the lower large connecting rod 118, the inclined small connecting rod 119, etc. to rotate simultaneously. The two side connecting rod assemblies work simultaneously to move the end cover clamping plate 121 close to the marine boiler end cover 2 transported from below until the bottom surface of the horizontal fixed connecting rod 120 contacts the end cover conveyor belt 103, and then stop moving.

[0040] At this time, start the end cover cylinder 124. The end cover cylinder 124 uses the hinge seat 125 to push the three-fork rod 131 to rotate. One end of the three-fork rod 131 is closely attached to the marine boiler end cover 2. The hinge seat 125 also pushes the right long connecting rod 126 and the right rotating rod 127 to rotate. The right rotating rod 127 is closely attached to the marine boiler end cover 2. The three-fork rod 131 then pushes the left long connecting rod 129, and the left long connecting rod 129 pushes the left bent rod 128 to rotate. The left bent rod 128 is closely attached to the marine boiler end cover 2. In this way, the marine boiler end cover 2 is clamped. Then start the moving motor 107 to reverse, move the marine boiler end cover 2 to be docked with the marine boiler tube barrel 3, and stop moving until the two are fitted and fixed.

[0041] At this time, start the welding cylinder 104 to drive the welding gun 106 to descend close to the connection between the marine boiler end cover 2 and the marine boiler tube barrel 3. Then start the welding gun 106 to weld the connection between the two. After welding one place, start the reversing motor 113 to drive the reversing roller shaft 109 to rotate, rotate the marine boiler end cover 2 and the marine boiler tube barrel 3, and continue to weld the next surface until all connections are welded.

[0042] Then start the tube clamping motor 110 to reverse again, so that the threaded seat 112 slides, and the two tube clamping frames 108 approach each other. At the same time, start the end cover cylinder 124 to release the fixation of the marine boiler end cover 2. At this time, place the welded body of the marine boiler end cover 2 and the marine boiler tube 3 on the tube conveyor belt 101. The tube conveyor belt 101 moves in the reverse direction to remove the welded one, and then prepare for the next welding.

[0043] What is not described in this invention is applicable to the prior art.

Claims

1. An automatic welding device for a marine boiler tube sheet, comprising a positioning bracket (102), characterized in that, On one side of the positioning bracket (102), there is a tube conveyor belt (101), and on the other side, there is an end cover conveyor belt (103). Above the tube conveyor belt (101), there is a pipe gripper which is used to clamp the marine boiler tube (3) and drive the marine boiler tube (3) to rotate. Above the pipe gripper, a welding gun (106) is slidably arranged. Above the end cover conveyor belt (103), a cover plate gripper is rotatably arranged, and a three-sided clamp is arranged on the cover plate gripper. The three-sided clamp is used to clamp the marine boiler end cover (2), and the cover plate gripper is used to drive the marine boiler end cover (2) to move to the marine boiler tube (3) for docking.

2. The automatic welding device for the tube sheet of a marine boiler according to claim 1, characterized in that The pipe gripper includes a driving assembly, and two groups of axially symmetric single grippers are arranged on the driving assembly. The driving assembly includes a tube clamping motor (110), and the tube clamping motor (110) is fixedly installed on the positioning bracket (102). A bidirectional lead screw (111) is fixedly connected to the output shaft of the tube clamping motor (110), and the single grippers are arranged on both sides of the bidirectional lead screw (111).

3. The automatic welding device for the tube sheet of a marine boiler according to claim 2, characterized in that, The single gripper includes a threaded seat (112), and the threaded seat (112) is in threaded cooperation with the bidirectional lead screw (111). The threaded seat (112) is slidably installed on the positioning bracket (102). A tube clamping frame (108) is slidably arranged on the threaded seat (112). The tube clamping frame (108) includes a round bar at the bottom, and an angle link is fixedly installed on each side of the round bar. A reversing roller shaft (109) is further arranged at the top of the tube clamping frame (108), and the reversing roller shaft (109) is rotatably installed on the angle link. The reversing roller shaft (109) is fixedly connected to the output shaft of the reversing motor (113). The tube clamping frame (108) and the reversing roller shaft (109) are used to clamp the marine boiler tube (3), and the reversing motor (113) is used to drive the marine boiler tube (3) to rotate.

4. An automatic welding device for a marine boiler tube sheet according to claim 1, characterized in that, The welding gun (106) is fixedly installed on a welding ring (105), and the welding ring (105) is fixedly connected to the movable end of a welding cylinder (104). The welding gun (106) is also slidably installed on the positioning bracket (102).

5. An automatic welding device for a marine boiler tube sheet according to claim 1, characterized in that, The cover plate gripper includes an end cover clamping plate (121) and link assemblies symmetrically arranged on both sides of the end cover clamping plate (121). The bottom of the end cover clamping plate (121) is a U-shaped plate, and a grooved plate is fixedly installed on each side of the top of the U-shaped plate. A fixed U-shaped frame (130) is fixedly installed between the grooved plate and the U-shaped plate. The fixed U-shaped frame (130) coincides with the shape of the U-shaped plate, and a straight rod protrudes from the U-shaped bottom of the fixed U-shaped frame (130). A three-sided clamp is arranged below the grooved plate of the end cover clamping plate (121).

6. The automatic welding device for a marine boiler tube sheet according to claim 5, characterized in that, The described connecting rod assembly includes a horizontal fixed connecting rod (120). The horizontal fixed connecting rod (120) is fixedly installed in the groove of the grooved plate of the end cover clamping plate (121). An inclined small connecting rod (119) is hinged to the middle end of the horizontal fixed connecting rod (120). An upper parallel connecting rod (117) is hinged to the end of the horizontal fixed connecting rod (120). The inclined small connecting rod (119) is hinged to the lower large connecting rod (118). The lower large connecting rod (118) is rotatably connected to the auxiliary small connecting rod (116). The described auxiliary small connecting rod (116) is rotatably installed on the lower short connecting rod (115). The lower short connecting rod (115) is rotatably installed on the positioning bracket (102). The upper parallel connecting rod (117) is rotatably connected to the lower short connecting rod (115). An upper long connecting rod (114) is also hinged to the hinged point of the auxiliary small connecting rod (116) and the lower large connecting rod (118). The upper long connecting rod (114) is rotatably connected to the positioning bracket (102).

7. An automatic welding device for a marine boiler tube sheet according to claim 5, characterized in that, The described three-sided clamp includes a top small rod (123). The top small rod (123) is rotatably installed on the straight rod of the fixed U-shaped frame (130). A end cover cylinder (124) is fixedly connected to the top small rod (123). A hinge seat (125) is fixedly arranged at the movable end of the end cover cylinder (124). A right long connecting rod (126) is rotatably connected to the hinge seat (125). The right long connecting rod (126) is hinged to the right rotating rod (127). The middle of the right rotating rod (127) is hinged to one U-shaped end point of the fixed U-shaped frame (130). A three-fork rod (131) is also hinged to the hinge seat (125). The top of the three-fork rod (131) is hinged to the left long connecting rod (129). The left long connecting rod (129) is rotatably connected to the left bent rod (128). The inflection point of the left bent rod (128) is rotatably connected to the other U-shaped end point of the fixed U-shaped frame (130).

8. An automatic welding device for a marine boiler tube sheet according to claim 7, characterized in that, A rotating roller (122) is rotatably arranged at the end of the left bent rod (128), the end of the right rotating rod (127), and the branched section at the end of the three-fork rod (131).

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