Hanging movable type operation platform for automatic welding and operation method

Abstract

The invention relates to the technical field of automatic welding equipment for storage tanks, in particular to a suspension moving type operation platform for automatic welding and an operation method.The suspension moving type operation platform comprises a suspension moving tackle installed on a storage tank body in a sliding mode, and platform lifting track frames are detachably installed on the left side and the right side of the bottom end of the suspension moving tackle; a working platform is arranged on the inner side of the bottom end of the platform lifting track frame, and a driving piece is arranged in the working platform and used for driving the working platform to move up and down on one side of the platform lifting track frame. Transverse movement of the suspension moving tackle along the wall plate of the tank body is achieved through the idler wheels driven by the speed reducer, the two sides of the suspension moving tackle are connected with the two platform lifting track frames in a hung mode respectively, the working platform is arranged on the platform lifting track frames, and simultaneous working of equipment on the two sides of the wall plate can be achieved. And for different wall plate thicknesses, different wall plates are adjusted to be compatible, and meanwhile, different welding slag cleaning strengths are carried out according to the different wall plate thicknesses, so that whole-course automatic following and automatic welding can be realized along with movement of a welding machine.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding equipment for storage tanks, and in particular to a suspended mobile working platform for automatic welding and an operating method thereof. Background Art

[0002] At present, frame structures are mostly used for the welding of circumferential seams and vertical welds of large storage tanks. The equipment of the storage tank body is relatively complex, which is not conducive to disassembly and transportation, and the equipment as a whole cannot be freely lifted vertically. If a lifting platform is used inside the equipment, in order to be compatible with the vertical weld length of the storage tank body, the equipment itself needs to be made very large, which increases the manufacturing cost and installation difficulty. Automatic welding equipment without a lifting platform requires manual climbing to platforms at different heights of the equipment, which increases the risk of manual operation.

[0003] In the prior art, for example, a patent with publication number CN105499855B discloses an auxiliary work chamber for automatic welding of large storage tanks and a method for using the same, which includes a rectangular frame, a circle plate transverse moving roller, a motor and a reduction gearbox. The rectangular frame is divided into a front chamber and a rear chamber, and a gap is left between the front and rear chambers for the circle plate to extend into. The circle plate transverse moving roller is fixedly provided between the tops of the front and rear chambers. The motor drives the circle plate transverse moving roller to rotate via the reduction gearbox, so that the entire auxiliary work chamber for automatic welding of large storage tanks can move along the top of the circle plate.

[0004] The above-mentioned structural scheme adopts a frame structure as a whole to weld the storage tank. However, during the welding process, the lifting can only be slightly lifted and lowered within the frame platform. The flexibility of equipment operation is not good, and it cannot take into account the longer vertical welds, and it is impossible to realize automatic welding of circumferential seams and vertical seams. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a suspended mobile work platform and operation method for automatic welding, so as to solve the problem that during the welding process, the lifting and lowering can only be slightly lifted and lowered within the frame platform, the equipment operation flexibility is poor, the longer vertical welds cannot be taken into account, and the automatic welding of circumferential seams and vertical seams cannot be achieved.

[0006] Based on the above purpose, the present invention provides a suspended mobile work platform for automatic welding, comprising a suspended mobile pulley slidably mounted on a storage tank body, a platform lifting track frame can be detachably mounted on both sides of the bottom end of the suspended mobile pulley, a work platform is arranged on the inner side of the bottom end of the platform lifting track frame, and a driving member is arranged inside the work platform, and the driving member is used to drive the work platform to move up and down on one side of the platform lifting track frame;

[0007] A bracket structure is fixedly installed on the top of one side of the suspension moving pulley, a welding track is fixedly installed on one side of the bracket structure, a welding head for welding is arranged inside the welding track, and a grinding piece is arranged on the welding track, and the grinding piece is used to clean the circumferential seam and vertical seam of the storage tank body;

[0008] The suspended movable pulley includes a pulley frame, a reducer is movably installed at the bottom end of the pulley frame, the output end of the reducer is fixedly connected to a double V-shaped roller, the double V-shaped rollers are arranged on both sides of the pulley frame, horizontal support plates are slidably installed on both sides of the pulley frame, a displacement sensor is fixedly installed at the bottom end of the horizontal support plate, the displacement sensor is electrically connected to the grinding part, and a vertical rod is fixedly installed at the bottom of the pulley frame.

[0009] Preferably, the platform lifting track frame includes a connecting ear plate fixedly installed on the bottom end of the suspended moving pulley, a climbing frame beam is fixedly installed on the bottom end of the connecting ear plate, a transmission rack is fixedly installed on one side of the climbing frame beam, and slide rails are provided on both sides of the climbing frame beam, and a limit stop block is fixedly installed on the inner bottom end of the slide rail.

[0010] Preferably, the driving member includes a mounting shell fixedly installed inside the working platform, pulley broken shaft guard plates are fixedly installed on both sides of the mounting shell, the pulley broken shaft guard plates are slidably installed on the outside of the climbing frame beam, an anti-broken shaft guard plate is fixedly installed inside the pulley broken shaft guard plate, a tensioning wheel is rotatably installed on one side of the anti-broken shaft guard plate, the tensioning wheel abuts against one side of a transmission rack, and a gear is meshed and rotatably engaged on the other side of the transmission rack, the gear is rotatably installed on one side of the anti-broken shaft guard plate, and a first motor is fixedly installed in the mounting shell, and an output end of the first motor is fixedly connected to the gear.

[0011] Preferably, the anti-broken axle guard plate is also provided with a differential anti-fall device, and the differential anti-fall device is provided with a gear plate meshing with a transmission rack, and the differential anti-fall device is located below the gear.

[0012] Preferably, two second wheels arranged in a mirror image are fixedly installed on one side of the climbing frame beam, and a first wheel is movably installed inside the vertical rod. The second wheel and the first wheel are arranged corresponding to each other up and down, and both the second wheel and the first wheel abut against one side of the tank body.

[0013] Preferably, the bracket structure includes a rail bracket fixedly mounted on a suspended moving pulley, a fall arrester is fixedly mounted on the top of the rail bracket, a suspension frame is fixedly mounted on one side of the rail bracket, and welding rails are fixedly mounted on both sides of the suspension frame.

[0014] Preferably, the welding track includes track rods fixedly mounted on both sides of the suspension frame, magnets are fixedly mounted on both sides of the track rods, and a welding seat is slidably mounted on the outside of the track rods, a support frame is fixedly mounted on the top of the welding seat, a grinding piece is fixedly mounted on one side of the support frame, and the grinding piece is located above the welding machine head.

[0015] Preferably, the grinding piece includes a frame seat fixedly mounted on one side of the support frame, a spring seat is fixedly mounted inside the frame seat, an electromagnet is arranged inside the spring seat, the electromagnet is electrically connected to the displacement sensor, a welding head is sleeved on one end of the spring seat, and a magnet block corresponding to the electromagnet is arranged on one side of the welding head;

[0016] A friction wheel is abutted on one side of the magnet block, a slide rod is slidably installed on one side of the friction wheel, the slide rod is installed on the inner wall of the frame seat, a round roller is abutted on the other side of the friction wheel, a second motor is fixedly installed on the outside of the frame seat, and the output end of the second motor is fixedly connected to one end of the round roller.

[0017] Preferably, the circular roller includes an upper cylinder and a lower cylinder, the output end of the second motor is fixedly connected to the top of the upper cylinder, the friction coefficient of the upper cylinder is smaller than the friction coefficient of the lower cylinder, and the magnetic poles of the magnet block are the same as the magnetic poles of the magnetic field generated by the electromagnet.

[0018] The embodiment of this specification also provides an operation method of the above-mentioned suspended mobile working platform for automatic welding, comprising the following steps:

[0019] After the suspension moving pulley is assembled on the ground, it is lifted to the upper end surface of the wall plate of the storage tank body by a crane, and the first contact wheel on the suspension moving pulley is adjusted to make it close to the wall plate, and the platform lifting track frame and the working platform are assembled on the ground. The platform lifting track frames on both sides together with the working platform are lifted by a crane to the installation position of the suspension moving pulley, and fixed with pins, and the bracket structure is lifted to the installation position of the suspension moving pulley and connected with bolts, and the welding track carrying the welding head and grinding parts is lifted to the hanging point of the bracket structure for hanging;

[0020] When vertical seam welding is required, the work platform is moved to rise to the top of the vertical weld. After reaching the position, the worker pulls the welding track from the bracket structure to a certain distance away from the wall panel to ensure that there is no friction or collision between the welding track and the wall panel of the tank body. After moving the hanging moving pulley to the vertical weld welding position, the worker pushes the welding track toward the wall panel to make the welding track as close to the wall panel as possible, and then the magnets on both sides make it adsorbed on the surface of the wall panel. During the tightening process, the work platform is controllably lowered from top to bottom, and the welding head is synchronously and controllably lowered on the welding track until all the magnets on the track are fixed. The work platform and the welding head on the welding track rise to the highest point of the upper end surface of the wall panel. At this time, the welding preparation work is completed;

[0021] Start the welding equipment, and the working platform automatically welds from top to bottom synchronously according to the welding speed of the welding head. When the welding reaches the bottom weld position, the welding stops, and the working platform stops moving at the same time. During the welding process, the welding tracks on both sides of the wall panel can be operated at the same time. After welding, the working platform moves upward, and the angle grinder in the frame seat on the welding seat contacts the weld, so that the second motor in the grinding piece drives the round roller to rotate. Based on friction transmission, the round roller drives the friction wheel and the magnet block to rotate at the same time, and the angle grinder outside the magnet block rotates to grind and clean the vertical weld;

[0022] When welding the girth weld of the wall plate, the welding head is on the circular track between the upper and lower wall plates, and is not connected to the working platform. The mobile working platform is lifted to the welding position of the girth weld, and then the suspended moving pulley is started to reach the position of the welding head, and the welding head on the welding seat is started to weld. The suspended moving pulley moves horizontally along the girth weld along with the welding speed of the welding head until the girth weld is completed. When the suspended moving pulley returns to the original path, the angle grinder on the welding seat is used to contact and grind the girth weld.

[0023] When the thickness of the arm plate during welding is relatively large, the first contact wheel on the suspended moving pulley is adjusted to make it fully close to the wall plate. Under the action of the displacement sensor on one side of the horizontal support plate, after the electromagnet is connected to the current, the magnetic field poles generated push the angle grinding head outside the magnet block to move toward the wall plate. Under the action of the wall plate, the angle grinding head in the grinding piece and the arm plate weld are made closer. At the same time, the magnet block and the friction wheel move in the spring seat. The friction coefficient of the upper column is smaller than that of the lower column. The friction coefficient of the friction wheel is large in the lower column part, and the grinding efficiency of the angle grinding head is faster. Therefore, when the thickness of the arm plate is relatively thick, the cleaning of the weld can be further strengthened.

[0024] Beneficial effects of the present invention:

[0025] The roller driven by the reducer can realize the lateral movement of the suspended moving pulley along the tank wall. While moving, the guiding performance of the wheel rim is taken into account. In order to improve the stability of the platform suspension and prevent the platform from overturning horizontally, horizontal wheels are used on both sides of the platform top to enable the platform to move smoothly. Two platform lifting track frames are respectively mounted on both sides of the suspended moving pulley. The platform lifting track frame is equipped with a working platform, which can realize the simultaneous operation of the equipment on both sides of the wall panel. For different wall panel thicknesses, the working platform can use the adjustment of the platform width on both sides to be compatible with different wall panels, and at the same time, different welding slag cleaning strengths are performed according to different wall panel thicknesses. For circumferential seam and vertical seam welding operations, it can follow the movement of the welding machine to achieve automatic following and automatic welding throughout the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 It is a front view structural schematic diagram of the present invention as a whole;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the suspended movable pulley of the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the platform lifting track frame and the working platform of the present invention;

[0031] Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the platform lifting track frame of the present invention;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the welding track of the present invention;

[0034] Figure 8 It is a schematic diagram of the connection structure between the welding seat and the track of the present invention;

[0035] Fig. 9 It is a schematic diagram of the internal structure of the frame seat of the present invention.

[0036] The markings in the figure are:

[0037] 1. Suspension mobile pulley; 11. Pullway frame; 12. Horizontal support plate; 13. Speed ​​reducer; 14. Double V-shaped roller; 15. Displacement sensor; 16. Vertical rod; 17. First roller; 2. Platform lifting track frame; 21. Connecting ear plate; 22. Slide rail; 23. Transmission rack; 24. Limit stopper; 25. Climbing frame beam; 26. Second roller; 3. Working platform; 31. First motor; 32. Tension wheel; 33. Anti-broken shaft guard plate; 34. Differential anti-fall device; 35. Mounting shell; 36. Pulley break Shaft guard plate; 37, gear; 4, tank body; 5, bracket structure; 51, track bracket; 52, fall arrester; 53, suspension frame; 6, welding track; 61, track rod; 62, magnet; 63, welding seat; 64, welding head; 67, support frame; 7, grinding part; 71, frame seat; 72, electromagnet; 73, spring seat; 74, angle grinding head; 75, friction wheel; 76, slide bar; 77, second motor; 78, round roller; 79, magnet block; 8, driving part; 9, upper cylinder; 10, lower cylinder. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, a suspended mobile work platform for automatic welding includes a suspended mobile pulley 1 slidably mounted on a storage tank body 4, a platform lifting track frame 2 is detachably mounted on both sides of the bottom end of the suspended mobile pulley 1, a work platform 3 is arranged on the inner side of the bottom end of the platform lifting track frame 2, and a driving member 8 is arranged inside the work platform 3, and the driving member 8 drives the work platform 3 to move up and down on one side of the platform lifting track frame 2;

[0040] A hanger structure 5 is fixedly installed on the top of one side of the suspension moving pulley 1, and a welding track 6 is fixedly installed on one side of the hanger structure 5. A welding head 64 for welding is arranged inside the welding track 6, and a grinding piece 7 is arranged on the welding track 6. The grinding piece 7 is used to clean the circumferential seam and the vertical seam of the storage tank body 4;

[0041] The suspended movable pulley 1 includes a pulley frame 11, a reducer 13 is movably installed at the bottom end of the pulley frame 11, and a double V-shaped roller 14 is fixedly connected to the output end of the reducer 13. The double V-shaped rollers 14 are arranged on both sides of the pulley frame 11. Horizontal support plates 12 are slidably installed on both sides of the pulley frame 11, and a displacement sensor 15 is fixedly installed at the bottom end of the horizontal support plate 12. The displacement sensor 15 is electrically connected to the grinding piece 7, and a vertical rod 16 is fixedly installed at the bottom of the pulley frame 11.

[0042] In this embodiment, the double V-shaped rollers 14 driven by the reducer 13 realize the lateral movement of the suspended mobile pulley 1 on the tank body 4. In order to improve the stability of the platform suspension and prevent the platform from overturning horizontally, the first wheels 17 are used to support both sides of the platform top so that the platform can move smoothly, and two platform lifting track frames 2 are respectively installed on both sides of the suspended mobile pulley 1. The working platform 3 on one side of the platform lifting track frame 2 is convenient for operation, and the equipment can be operated on both sides of the wall panel at the same time. For different wall panel thicknesses, the working platform 3 can use the adjustment of the width of the platforms on both sides to be compatible with different wall panels. At the same time, according to the different wall panel thicknesses, the grinding piece 7 on the welding track 6 performs different welding slag cleaning strengths;

[0043] When welding the vertical seam of the wall panel, the welding equipment is started, and the working platform 3 performs automatic welding from top to bottom synchronously according to the welding speed of the welding head 64. When the welding seam reaches the bottom, the welding is stopped, and the working platform 3 stops moving at the same time. During the welding process, the welding tracks 6 on both sides of the wall panel can be operated at the same time;

[0044] When welding the girth weld of the wall panel, the welding head 64 is on the circular track between the upper and lower wall panels, and is not connected to the working platform 3. The mobile working platform 3 is raised and lowered to the welding position of the girth weld, and then the suspended moving pulley 1 is started to reach the position of the welding head 64, and the welding head 64 on the welding seat 63 is started for welding. The suspended moving pulley 1 moves horizontally along the girth weld with the welding speed of the welding head 64 until the girth weld is completed.

[0045] As an implementation method, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the platform lifting track frame 2 includes a connecting ear plate 21 fixedly installed at the bottom end of the suspended moving pulley 1, a climbing frame beam 25 is fixedly installed at the bottom end of the connecting ear plate 21, a transmission rack 23 is fixedly installed on one side of the climbing frame beam 25, and slide rails 22 are provided on both sides of the climbing frame beam 25, and a limit stop block 24 is fixedly installed at the inner bottom end of the slide rail 22.

[0046] The limit blocks 24 block and limit the working platform 3 at the upper and lower limit positions to prevent the working platform 3 from sliding off the track.

[0047] Among them, the driving component 8 includes a mounting shell 35 fixedly installed inside the working platform 3, and pulley broken shaft guard plates 36 are fixedly installed on both sides of the mounting shell 35. The pulley broken shaft guard plates 36 are slidably installed on the outside of the climbing frame beam 25. An anti-broken shaft guard plate 33 is fixedly installed inside the pulley broken shaft guard plate 36. A tensioning wheel 32 is rotatably installed on one side of the anti-broken shaft guard plate 33. The tensioning wheel 32 abuts against one side of the transmission rack 23, and a gear 37 is meshed and rotatably installed on the other side of the transmission rack 23. The gear 37 is rotatably installed on one side of the anti-broken shaft guard plate 33. A first motor 31 is fixedly installed in the mounting shell 35, and the output end of the first motor 31 is fixedly connected to the gear 37.

[0048] In this embodiment, the first motor 31 drives the gear 37 to rotate, the gear 37 engages with the transmission rack 23 on the climbing frame beam 25, and the transmission rack 23 abuts on one side of the tensioning wheel 32 to enhance stability and prevent tooth jumping during movement, thereby driving the pulley shaft protection plates 36 on both sides of the working platform 3 to move on the slide rail 22, thereby realizing the up and down movement of one side of the platform lifting track frame 2.

[0049] As an implementation method, Figure 4 , Figure 5 As shown, a differential anti-fall device 34 is also provided on the anti-broken shaft guard plate 33 , and a gear plate meshing with the transmission rack 23 is provided on the differential anti-fall device 34 , and the differential anti-fall device 34 is located below the gear 37 .

[0050] In this embodiment, a gear disc meshing with the transmission rack 23 is provided on the differential fall arrester 34 to prevent the working platform 3 outside the platform lifting track frame 2 from falling. The platform 3 is locked at the moment of falling due to broken axle to prevent the entire platform from falling, thereby enhancing overall safety.

[0051] As an implementation method, Figure 1 , Figure 2 , Figure 3 As shown, two second wheels 26 arranged in a mirror image are fixedly installed on one side of the climbing frame beam 25, and a first wheel 17 is movably installed inside the vertical rod 16. The second wheels 26 and the first wheels 17 are arranged correspondingly up and down, and both the second wheels 26 and the first wheels 17 abut against one side of the tank body 4.

[0052] In this embodiment, the second contact wheel 26 and the first contact wheel 17 are used to move the suspended movable pulley 1 as a whole while taking into account the guiding performance of the wheel rim. In order to improve the stability of the suspension of the working platform 3 and prevent horizontal overturning, when the double V-shaped roller 14 driven by the reducer 13 realizes the lateral movement of the suspended movable pulley 1 on the tank body 4, the working platform 3 can be moved smoothly with the assistance of the second contact wheel 26 and the first contact wheel 17.

[0053] As an implementation method, Figure 2 , Figure 3 , Figure 7 As shown, the hanger structure 5 includes a rail hanger 51 fixedly mounted on the suspended moving pulley 1, a fall arrester 52 is fixedly mounted on the top of the rail hanger 51, and a suspension frame 53 is fixedly mounted on one side of the rail hanger 51, and the welding rail 6 is fixedly mounted on both sides of the suspension frame 53.

[0054] In this embodiment, the fall arrester 52 is connected to the personnel on the working platform 3 , and the assembly plays the role of preventing the personnel from falling and suspending the welding track 6 .

[0055] As an implementation method, Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, the welding track 6 includes a track rod 61 fixedly mounted on both sides of the suspension frame 53, magnets 62 are fixedly mounted on both sides of the track rod 61, and a welding seat 63 is slidably mounted on the outside of the track rod 61, a welding head 64 is fixedly mounted on the outside of the welding seat 63, a support frame 67 is fixedly mounted on the top of the welding seat 63, a grinding piece 7 is fixedly mounted on one side of the support frame 67, and the grinding piece 7 is located above the welding head 64.

[0056] In this embodiment, when welding the vertical seam of the wall panel, the track as a whole is adsorbed on the surface of the tank body 4 by a plurality of magnets 62, the welding equipment is started, and the working platform 3 performs automatic welding from top to bottom synchronously according to the welding speed of the welding head 64. When the welding reaches the bottom weld position, the welding is stopped, and the working platform 3 stops moving at the same time. During the welding process, the welding tracks 6 on both sides of the wall panel can be operated at the same time;

[0057] When welding the girth weld of the wall panel, the welding head 64 is on the circular track between the upper and lower wall panels, and is not connected to the working platform 3. The mobile working platform 3 is lifted and lowered to the welding position of the girth weld, and then the suspended moving pulley 1 is started to reach the position of the welding head 64, and the welding head 64 on the welding seat 63 is started to weld. The suspended moving pulley 1 moves horizontally along the girth weld along with the welding speed of the welding head 64 until the girth weld is completed;

[0058] As an implementation method, Figure 7 , Figure 8 and Fig. 9 As shown, the grinding piece 7 includes a frame seat 71 fixedly mounted on one side of the support frame 67, a spring seat 73 is fixedly mounted inside the frame seat 71, an electromagnet 72 is arranged inside the spring seat 73, the electromagnet 72 is electrically connected to the displacement sensor 15, the welding head 64 is sleeved on one end of the spring seat 73, and a magnet block 79 corresponding to the electromagnet 72 is arranged on one side of the welding head 64;

[0059] A friction wheel 75 is abutted against one side of the magnet block 79, a slide bar 76 is slidably installed on one side of the friction wheel 75, and the slide bar 76 is installed on the inner wall of the frame seat 71. A round roller 78 is abutted against the other side of the friction wheel 75. A second motor 77 is fixedly installed on the outside of the frame seat 71, and the output end of the second motor 77 is fixedly connected to one end of the round roller 78.

[0060] In this embodiment, after the wall panel ring welding or vertical welding seam welding is performed, the second motor 77 in the grinding member 7 drives the round roller 78 to rotate. Based on the friction transmission, the round roller 78 drives the friction wheel 75 and the magnet block 79 to rotate at the same time, and the angle grinding head 74 outside the magnet block 79 rotates to grind and clean the weld.

[0061] As an implementation method, Figure 7 , Figure 8 and Fig. 9 As shown, the round roller 78 includes an upper cylinder 9 and a lower cylinder 10, the output end of the second motor 77 is fixedly connected to the top of the upper cylinder 9, the friction coefficient of the upper cylinder 9 is smaller than the friction coefficient of the lower cylinder 10, and the magnetic poles of the magnet block 79 are the same as the magnetic poles of the magnetic field generated by the electromagnet 72.

[0062] In this embodiment, when the thickness of the arm plate during welding is relatively large, after the electromagnet 72 is connected to the current, the magnetic field poles generated push the angle grinding head 74 outside the magnet block 79 to move toward the wall panel, and at the same time, the magnet block 79 and the friction wheel 75 move in the spring seat 73 and are located on the lower column 10. Then, the friction coefficient of the upper column 9 is smaller than the friction coefficient of the lower column 10, and the grinding efficiency of the angle grinding head 74 is faster, so that when the thickness of the arm plate is relatively thick, the cleaning of the weld can be further strengthened.

[0063] As an embodiment, a method for operating a suspended mobile work platform for automatic welding,

[0064] The following steps are involved:

[0065] The suspension movable pulley 1 is assembled on the ground, and is hoisted to the upper end surface of the wall plate of the storage tank body 4 by a crane. The first contact wheel 17 on the suspension movable pulley 1 is adjusted to make it close to the wall plate. The platform lifting track frame 2 and the working platform 3 are assembled on the ground. The platform lifting track frames 2 on both sides together with the working platform 3 are hoisted to the installation position of the suspension movable pulley 1 by a crane, and are connected and fixed with a pin shaft. The bracket structure 5 is hoisted to the installation position of the suspension movable pulley 1 and connected with bolts, and the welding track 6 carrying the welding head 64 and the grinding piece 7 is hoisted to the hanging point of the bracket structure 5 for hanging;

[0066] When it is necessary to perform vertical seam welding, the work platform 3 is moved to rise to the uppermost end of the vertical weld. After reaching the position, the worker pulls the welding track 6 from the bracket structure 5 to a certain distance away from the wall panel to ensure that the welding track 6 does not rub or collide with the wall panel of the tank body 4. After moving the hanging movable pulley 1 to the vertical seam welding position, the worker pushes the welding track 6 toward the wall panel to make the welding track 6 as close to the wall panel as possible, and then the magnets 62 on both sides make it adsorbed on the surface of the wall panel. During the tightening process, the work platform 3 is controllably lowered from top to bottom, and the welding head 64 is synchronously and controllably lowered on the welding track 6. After all the magnets 62 on the tracks are fixed, the work platform 3 together with the welding head 64 on the welding track 6 rise to the highest point of the upper end surface of the wall panel. At this time, the welding preparation work is completed;

[0067] The welding equipment is started, and the working platform 3 performs automatic welding from top to bottom synchronously according to the welding speed of the welding head 64. When the welding reaches the bottom weld position, the welding is stopped, and the working platform 3 stops moving at the same time. During the welding process, the welding tracks 6 on both sides of the wall panel can be operated at the same time. After welding, the working platform 3 moves upward, and the angle grinder 74 in the frame seat 71 on the welding seat 63 is used to contact the weld, so that the second motor 77 in the grinding piece 7 drives the round roller 78 to rotate. Based on the friction transmission, the round roller 78 drives the friction wheel 75 and the magnet block 79 to rotate at the same time, and the angle grinder 74 outside the magnet block 79 rotates to grind and clean the vertical weld;

[0068] When welding the girth weld of the wall panel, the welding head 64 is on the circular track between the upper and lower wall panels, and is not connected to the working platform 3. The mobile working platform 3 is lifted and lowered to the welding position of the girth weld, and then the suspended mobile pulley 1 is started to reach the position of the welding head 64, and the welding head 64 on the welding seat 63 is started to weld. The suspended mobile pulley 1 moves horizontally along the girth weld along with the welding speed of the welding head 64 until the girth weld is completed. When the suspended mobile pulley 1 returns to the original path, the angle grinder 74 on the welding seat 63 is used to contact and grind the girth weld.

[0069] When the thickness of the arm plate is relatively large during welding, the first contact wheel 17 on the suspended movable pulley 1 is adjusted to make it sufficiently close to the wall plate. Under the action of the displacement sensor 15 on one side of the horizontal support plate 12, after the electromagnet 72 is connected to the current, the magnetic field poles generated push the angle grinding head 74 outside the magnet block 79 to move toward the wall plate. Under the action of the wall plate, the angle grinding head 74 in the grinding piece 7 is made closer to the arm plate weld. At the same time, the magnet block 79 and the friction wheel 75 move in the spring seat 73. The friction coefficient of the upper column 9 is smaller than that of the lower column 10. The friction coefficient of the friction wheel 75 is large in the lower column 10 part, and the grinding efficiency of the angle grinding head 74 is faster. Therefore, when the thickness of the arm plate is relatively thick, the cleaning of the weld can be further strengthened.

[0070] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0071] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A suspended mobile work platform for automatic welding, comprising a suspended mobile pulley (1) slidably mounted on a storage tank body (4), characterized in that: The left and right sides of the bottom end of the suspended movable pulley (1) are detachably mounted with a platform lifting track frame (2); the inner side of the bottom end of the platform lifting track frame (2) is provided with a working platform (3); the interior of the working platform (3) is provided with a driving member (8); the driving member (8) is used to drive the working platform (3) to move up and down on one side of the platform lifting track frame (2); A hanger structure (5) is fixedly mounted on the top of one side of the suspension movable pulley (1), a welding track (6) is fixedly mounted on one side of the hanger structure (5), a welding head (64) for welding is arranged inside the welding track (6), and a grinding piece (7) is arranged on the welding track (6), and the grinding piece (7) is used to clean the circumferential seam and the vertical seam of the storage tank body (4); The suspended movable pulley (1) comprises a pulley frame (11), a reducer (13) is movably mounted at the bottom end of the pulley frame (11), a double V-shaped roller (14) is fixedly connected to the output end of the reducer (13), and the double V-shaped roller (14) is arranged on both sides of the pulley frame (11), and horizontal support plates (12) are slidably mounted on both sides of the pulley frame (11), a displacement sensor (15) is fixedly mounted at the bottom end of the horizontal support plate (12), and the displacement sensor (15) is electrically connected to the grinding piece (7), and a vertical rod (16) is fixedly mounted at the bottom of the pulley frame (11).

2. A suspended mobile working platform for automatic welding according to claim 1, characterized in that: The platform lifting track frame (2) comprises a connecting ear plate (21) fixedly mounted on the bottom end of the suspended moving pulley (1); a climbing frame beam (25) is fixedly mounted on the bottom end of the connecting ear plate (21); a transmission rack (23) is fixedly mounted on one side of the climbing frame beam (25); slide rails (22) are provided on both sides of the climbing frame beam (25); and a limit stopper (24) is fixedly mounted on the inner bottom end of the slide rail (22).

3. A suspended mobile working platform for automatic welding according to claim 2, characterized in that: The driving member (8) comprises a mounting shell (35) fixedly mounted inside the working platform (3), a pulley shaft breakage protection plate (36) fixedly mounted on both sides of the mounting shell (35), the pulley shaft breakage protection plate (36) being slidably mounted on the outside of the climbing frame beam (25), an anti-shaft breakage protection plate (33) fixedly mounted inside the pulley shaft breakage protection plate (36), a tensioning wheel (32) rotatably mounted on one side of the anti-shaft breakage protection plate (33), the tensioning wheel (32) being in contact with one side of the transmission rack (23), a gear (37) being meshed and rotatably mounted on the other side of the transmission rack (23), the gear (37) being rotatably mounted on one side of the anti-shaft breakage protection plate (33), a first motor (31) fixedly mounted inside the mounting shell (35), the output end of the first motor (31) being fixedly connected to the gear (37).

4. The suspended mobile working platform for automatic welding according to claim 3, characterized in that: The anti-broken shaft guard plate (33) is also provided with a differential anti-drop device (34), and the differential anti-drop device (34) is provided with a toothed disc meshing with the transmission rack (23), and the differential anti-drop device (34) is located below the gear (37).

5. The suspended mobile working platform for automatic welding according to claim 3, characterized in that: Two second wheels (26) arranged in a mirror image are fixedly mounted on one side of the climbing frame beam (25), and a first wheel (17) is movably mounted inside the vertical rod (16). The second wheel (26) and the first wheel (17) are arranged in correspondence with each other up and down, and both the second wheel (26) and the first wheel (17) abut against one side of the storage tank body (4).

6. The suspended mobile working platform for automatic welding according to claim 1, characterized in that: The hanger structure (5) comprises a track hanger (51) fixedly mounted on the suspended moving pulley (1), a fall arrester (52) fixedly mounted on the top of the track hanger (51), a suspension frame (53) fixedly mounted on one side of the track hanger (51), and welding tracks (6) fixedly mounted on both sides of the suspension frame (53).

7. A suspended mobile working platform for automatic welding according to claim 6, characterized in that: The welding track (6) comprises a track rod (61) fixedly mounted on both sides of a suspension frame (53), magnets (62) being fixedly mounted on both sides of the track rod (61), and a welding seat (63) being slidably mounted on the outside of the track rod (61), a support frame (67) being fixedly mounted on the top of the welding seat (63), a grinding piece (7) being fixedly mounted on one side of the support frame (67), and the grinding piece (7) being located above the welding machine head (64).

8. The suspended mobile working platform for automatic welding according to claim 7, characterized in that: The grinding piece (7) comprises a frame seat (71) fixedly mounted on one side of a support frame (67); a spring seat (73) is fixedly mounted inside the frame seat (71); an electromagnet (72) is arranged inside the spring seat (73); the electromagnet (72) is electrically connected to a displacement sensor (15); a welding head (64) is sleeved on one end of the spring seat (73); a magnet block (79) corresponding to the electromagnet (72) is arranged on one side of the welding head (64); A friction wheel (75) is abutted against one side of the magnet block (79), a slide bar (76) is slidably mounted on one side of the friction wheel (75), and the slide bar (76) is mounted on the inner wall of the frame seat (71), and a round roller (78) is abutted against the other side of the friction wheel (75). A second motor (77) is fixedly mounted on the outside of the frame seat (71), and an output end of the second motor (77) is fixedly connected to one end of the round roller (78).

9. A suspended mobile working platform for automatic welding according to claim 8, characterized in that: The circular roller (78) comprises an upper cylinder (9) and a lower cylinder (10), the output end of the second motor (77) is fixedly connected to the top end of the upper cylinder (9), the friction coefficient of the upper cylinder (9) is smaller than the friction coefficient of the lower cylinder (10), and the magnetic poles of the magnet block (79) are the same as the magnetic poles of the magnetic field generated by the electromagnet (72).

10. An operating method for a suspended mobile work platform for automatic welding, applied to the suspended mobile work platform for automatic welding as claimed in any one of claims 1 to 9, characterized in that: The steps include: The suspension movable pulley (1) is assembled on the ground, and is lifted by a crane to the upper end surface of the wall plate of the storage tank body (4) and placed in position. The first contact wheel (17) on the suspension movable pulley (1) is adjusted so that it is fully close to the wall plate. The platform lifting track frame (2) and the working platform (3) are assembled on the ground. The platform lifting track frames (2) on both sides together with the working platform (3) are lifted by a crane to the installation position of the suspension movable pulley (1) and fixed with pins. The bracket structure (5) is lifted to the installation position of the suspension movable pulley (1) and connected with bolts. The welding track (6) carrying the welding machine head (64) and the grinding piece (7) is lifted to the hanging point of the bracket structure (5) for hanging. When it is necessary to perform vertical seam welding, the work platform (3) is moved to rise to the uppermost end of the vertical seam. After reaching the position, the worker pulls the welding track (6) from the bracket structure (5) to a certain distance away from the wall panel to ensure that the welding track (6) does not rub or collide with the wall panel of the tank body (4). After moving the hanging movable pulley (1) to the vertical seam welding position, the worker pushes the welding track (6) toward the wall panel to make the welding track (6) as close to the wall panel as possible, so that the magnets (62) on both sides make it adsorbed on the surface of the wall panel. During the tightening process, the work platform (3) is controllably lowered from top to bottom, and the welding head (64) is synchronously and controllably lowered on the welding track (6) until all the magnets (62) on the track are fixed. Then, the work platform (3) together with the welding head (64) on the welding track (6) rise to the highest point of the upper end surface of the wall panel. At this time, the welding preparation work is completed. The welding equipment is started, and the working platform (3) performs automatic welding from top to bottom synchronously according to the welding speed of the welding head (64). When the welding seam reaches the bottom, the welding is stopped and the working platform (3) stops moving. During the welding process, the welding tracks (6) on both sides of the wall plate can be operated simultaneously. After welding, the working platform (3) moves upward, and the angle grinding head (74) in the upper frame seat (71) of the welding seat (63) is used to contact the weld seam, so that the second motor (77) in the grinding piece (7) drives the round roller (78) to rotate. Based on friction transmission, the round roller (78) drives the friction wheel (75) and the magnet block (79) to rotate simultaneously, and the angle grinding head (74) outside the magnet block (79) rotates to grind and clean the vertical weld seam; When welding the girth weld of the wall plate, the welding head (64) is on the circular track between the upper and lower wall plates, not connected to the working platform (3), the mobile working platform (3) is raised and lowered to the welding position of the girth weld, then the suspended moving pulley (1) is started to reach the position of the welding head (64), the welding head (64) on the welding seat (63) is started to weld, the suspended moving pulley (1) moves horizontally along the girth weld at the welding speed of the welding head (64) until the girth weld is completed, and when the suspended moving pulley (1) returns along the original path, the angle grinder (74) on the welding seat (63) is used to contact and grind the girth weld; When the thickness of the arm plate is large during welding, the first contact wheel (17) on the suspension moving pulley (1) is adjusted to be sufficiently close to the wall plate. After the electromagnet (72) is connected to the current under the action of the displacement sensor (15) on one side of the horizontal support plate (12), the magnetic field poles generated push the angle grinding head (74) outside the magnet block (79) to move toward the wall plate. Under the action of the wall plate, the angle grinding head (74) in the grinding piece (7) and the arm plate weld are made closer. At the same time, the magnet block (79) and the friction wheel (75) move in the spring seat (73). The friction coefficient of the upper column (9) is smaller than that of the lower column (10). The friction coefficient of the friction wheel (75) is large at the lower column (10), and the grinding efficiency of the angle grinding head (74) is faster. Therefore, when the thickness of the arm plate is thick, the welding seam can be further cleaned.

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