A kind of welding device with multi-point synchronous positioning function for pry-mounted separation cold box

Abstract

The application discloses a kind of pry dressings with the welding device with multi-point synchronous positioning function for separate cold box, it is related to cold box welding technical field, and welding device is welded to pry dressings for separate cold box, and welding device includes main body mechanism, welding mechanism, multi-point synchronous positioning mechanism and preheating mechanism, main body mechanism and welding mechanism are connected, main body mechanism and multi-point synchronous positioning mechanism are connected, welding mechanism and multi-point synchronous positioning mechanism are connected, welding mechanism and preheating mechanism are connected, main body mechanism includes installation base and mounting bracket, installation base is placed on ground, installation base and mounting bracket are tightly connected, installation base and welding mechanism are connected, installation base and preheating mechanism are connected, mounting bracket and welding mechanism are connected, mounting bracket and multi-point synchronous positioning mechanism are connected, main body mechanism further includes drive device, drive device and installation base are connected, and drive device includes driving roller, driving track and drive motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold box welding, in particular to a welding device with multi-point synchronous positioning function for pry-mounted separation cold box. BACKGROUND

[0002] In the production and manufacturing process of pry-mounted separation cold box, welding technology is an indispensable link. The quality of welding directly affects the performance and service life of the equipment, therefore, for the welding device for pry-mounted separation cold box, it is necessary to meet the needs of high efficiency, automation, etc. to realize the rapid and efficient welding of the cold box.

[0003] In the conventional technology, most single welding guns directly weld the cold box, which is low in efficiency. For multiple welding guns synchronous welding, after completing a welding, secondary detection is needed. For the case of missing welding, multiple welding guns are mostly moved synchronously for repair welding. And during welding, the welding is mostly directly performed on the welding part. In this process, the temperature gradient may be large, heat stress may be generated, and the welding quality may be affected. SUMMARY

[0004] The purpose of the present application is to provide a welding device with multi-point synchronous positioning function for pry-mounted separation cold box to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] The welding device is used for welding pry-mounted separation cold box, and the welding device comprises a main body mechanism, a welding mechanism, a multi-point synchronous positioning mechanism and a preheating mechanism. The main body mechanism and the welding mechanism are connected, the main body mechanism and the multi-point synchronous positioning mechanism are connected, the welding mechanism and the multi-point synchronous positioning mechanism are connected, and the welding mechanism and the preheating mechanism are connected.

[0007] In the welding device, the main body mechanism provides a place for the cold box to be welded and provides support for welding, the welding mechanism is used for welding the surface of the cold box, the multi-point synchronous positioning mechanism is used for positioning the position to be welded, which facilitates the welding of the welding mechanism, and the preheating mechanism is used for heating the position to be welded positioned, so as to avoid stress concentration in the welding process and affect the welding quality.

[0008] Further, the main body mechanism comprises a mounting base and a mounting frame, the mounting base is placed on the ground, the mounting base and the mounting frame are tightly connected, the mounting base and the welding mechanism are connected, the mounting base and the preheating mechanism are connected, the mounting frame and the welding mechanism are connected, the mounting frame and the multi-point synchronous positioning mechanism are connected, the main body mechanism further comprises a driving device, the driving device and the mounting base are connected, the driving device comprises a driving roller, a driving track and a driving motor, the driving roller is provided with two, the two driving rollers are placed on both sides of the mounting base, the driving roller and the side wall of the mounting base are rotationally connected through a rotating rod, one driving roller and the output end of the driving motor are tightly connected, the fixed end of the driving motor and the ground are tightly connected, the driving track and the driving roller are rotationally connected, the bottom of the mounting base is provided with an opening, the lower half of the driving track passes through the opening at the bottom of the mounting base, the upper half of the driving track and the upper surface of the mounting base are slidingly connected, and the driving track is used to convey the skid-mounted separation cold box.

[0009] In the main body mechanism, the mechanism is used to provide support for the cold box, the driving device is used to drive the cold box to move to a specified position for welding, after the first welding is completed, the cold box is transported out and a new cold box to be welded is transported in, the driving motor is started to make the driving roller rotate to drive the driving track to move, in the initial state, the cold box is placed in the driving track, after the driving motor is started, the driving track moves with the cold box, and after moving to a suitable position, the driving is stopped, the multi-point synchronous positioning mechanism is used for positioning, the preheating mechanism is used for preheating the welding part, the welding mechanism is used for welding, and after the completion, the driving motor is restarted to move the cold box out of the welding area.

[0010] Further, the welding mechanism comprises a moving device, a support block, a magnetic pad and a magnetic baffle, the moving device is provided with two groups, the two groups of moving devices are respectively connected with the mounting frame, the moving device and the support block are connected, the moving device and the multi-point synchronous positioning mechanism are connected, the moving device and the preheating mechanism are connected, the moving device comprises a servo motor, a driving shaft and a driving block, the fixed end of the servo motor and the mounting frame are slidingly connected, the output end of the servo motor and the driving shaft are tightly connected, the driving shaft and the driving block are connected through threads, the two driving shafts away from the servo motor are respectively rotationally connected with the two support blocks, the magnetic pad is provided with two, the two magnetic pads are respectively tightly connected with the two support blocks, the magnetic baffle and the mounting frame are tightly connected, the two magnetic pads and the magnetic baffle are slidingly connected, the magnetic pad is respectively placed on both sides of the magnetic baffle, the driving block and the multi-point synchronous positioning mechanism are connected, the welding mechanism further comprises a driving hydraulic cylinder and an extension rod, the driving hydraulic cylinder is provided with two, the extension rod is provided with two, the mounting base is provided with two sliding grooves, one end of the two extension rods and the mounting base are connected, the two extension rods are respectively slidingly connected with the two sliding grooves, the extension rod away from the mounting base is respectively tightly connected with the two servo motors, the driving hydraulic cylinder and the mounting base are connected, the fixed end of the driving hydraulic cylinder and the wall surface of the sliding groove are tightly connected, and the output end of the driving hydraulic cylinder and the extension rod are tightly connected.

[0011] In the welding mechanism, the mechanism is used for welding the to-be-welded part of the cold box, the movement is driven by the moving device, the servo motor and the mounting frame are slidingly connected, the bottom and the telescopic rod are tightly connected, the telescopic rod is placed in the sliding groove, the telescopic rod is driven to move left and right by the driving hydraulic cylinder, the telescopic rod itself can move up and down with the servo motor, the magnetic baffle and the mounting frame are tightly connected, and the magnetic baffle is erected between the two servo motors, the magnetic baffle and the magnetic pad are both made of electromagnet material and have magnetism after being electrified, can be attracted to each other, the output end of the servo motor and the driving shaft are tightly connected, the other end of the driving shaft and the supporting block are tightly connected, the end of the supporting block away from the driving shaft and the magnetic pad are tightly connected, and the magnetic pad and the magnetic baffle are slidingly connected, in the state of synchronous welding, the two magnetic pads are electrified, the magnetic baffle is not electrified, the two magnetic pads are attracted to each other and kept stable, in the process of elongation and shortening of the driving hydraulic cylinder and the telescopic rod, the magnetic baffle can slide on the magnetic baffle, after completing a synchronous welding, there may be a single side or both different places of the leakage welding, at this time, the magnetic pad of the leakage welding place is continuously electrified, the magnetic baffle is also electrified, and the other magnetic pad is de-energized, at this time, the driving hydraulic cylinder and the telescopic rod of the leakage welding place drive the moving device to move, and the welding is completed alone, so that synchronous welding and individual welding can be realized.

[0012] Further, the welding mechanism further comprises a welding assembly, the welding assembly is connected with the moving device, the welding assembly is connected with the driving block, the welding assembly comprises a welding gun and a welding wire roller, the welding gun and the welding wire roller are both provided with two, the two welding guns are tightly connected with the bottoms of the two driving blocks respectively, the two welding wire rollers are rotatably connected with the two driving blocks through a rotating motor respectively, the welding wire roller is tightly connected with the output end of the rotating motor, and the welding wire of the welding wire roller faces the output end of the welding gun.

[0013] In the welding mechanism, the welding assembly is further included, and the welding of the to-be-welded part is completed through the welding assembly, after the moving device moves to a suitable position, the welding gun is started, and at the same time, the rotating motor is started, so that the welding wire roller rotates to place the welding wire, the position where the welding wire is placed is just the position where the welding gun welds, then the servo motor is started, so that the driving shaft rotates, the driving block moves along the driving shaft, and the welding gun and the welding wire roller move and weld simultaneously.

[0014] Further, the multi-point synchronous positioning mechanism comprises a photosensitive resistor and a light emitting source, the photosensitive resistor and the light emitting source are both provided with two, the two photosensitive resistors are tightly connected with the bottoms of the two driving blocks respectively, and the two light emitting sources are tightly connected with the bottoms of the two driving blocks respectively.

[0015] In the multi-point synchronous positioning mechanism, the position of the welding position is determined by the photosensitive resistor and the light source. The light source and the photosensitive resistor are fixed on the bottom of the driving block. In the process of driving the driving block by the servo motor, the light source is continuously started. The reflected laser will irradiate on the photosensitive resistor, produce photoelectric effect, and convert the optical signal into electrical signal. For the welding position, compared with other positions, there will be a gap, so it will be deeper than other positions. The distance of laser reflection is different, and the intensity of reflected light will change. The position of the light source is relatively shallow, and the photosensitive element will generate a larger current. The position of the light source is relatively deep, and the generated current is relatively small. The specific position of the welding position is determined according to the current change. Generally, the initial position of the driving block is the position closest to the corresponding servo motor. After determination, the driving hydraulic cylinder and the telescopic rod drive the welding gun to the appropriate position. The welding gun is powered on, the rotating motor drives the welding wire roll to put the welding wire, the servo motor is started, and the synchronous welding is carried out. If the welding is carried out separately, the driving hydraulic cylinder and the telescopic rod drive the welding gun to be lifted. The corresponding multi-point synchronous positioning mechanism detects whether there is a missed welding during the movement of the moving device. If there is, the driving hydraulic cylinder and the telescopic rod drive the welding gun to the appropriate position for repair welding.

[0016] Further, the welding device further comprises a preheating mechanism, the preheating mechanism is provided with two groups, the two groups of preheating mechanisms are connected with the two groups of driving blocks respectively, the preheating mechanism comprises a hot air blower, an air supply pipe and a nozzle, the hot air blower is arranged on the mounting base, one end of the air supply pipe is communicated with the hot air blower, the other end of the air supply pipe away from the hot air blower is tightly connected with the nozzle, the nozzle is tightly connected with the driving block, and the output end of the nozzle faces the ground.

[0017] In the preheating mechanism, the mechanism heats the welding position before the welding mechanism welds, so that the welding position has a certain initial temperature. It can not only assist better welding, but also reduce the local heat accumulation in the welding process. Before the welding gun welds, hot air is generated by the hot air blower, transmitted to the nozzle by the air supply pipe, and sprayed to the welding position, so that it is heated before welding, the temperature gradient in the welding process is reduced, the generation of thermal stress is reduced, and the welding quality is improved.

[0018] Compared with the prior art, the present application has the beneficial effects that: after starting, the present application assists the movement of the welding gun by setting the moving device, the driving hydraulic cylinder and the telescopic rod, realizes accurate positioning of the to-be-welded part by setting the multi-point synchronous positioning mechanism, and positions by the photosensitive resistor and the light emitting source; in the process of moving and positioning the to-be-welded part by the welding gun, the light emitting source is started, the reflected laser will irradiate on the photosensitive resistor, a photoelectric effect is generated, the optical signal is converted into an electrical signal, there is a gap for the to-be-welded part, so compared with other positions, it is deeper, the distance of laser reflection is different, the intensity of reflected light will change, the position of the relatively shallow position reflects light relatively strongly, which will make the photosensitive element generate a larger current; while the position of the relatively deep position reflects light relatively weakly, the generated current is relatively small, the specific position of the to-be-welded part is determined according to the current change, after the to-be-welded part is determined, the preheating mechanism sprays the hot gas in the hot air blower from the nozzle to the to-be-welded part through the air supply pipe, which assists better welding in the subsequent process, reduces the temperature gradient in the welding process, and then the welding gun moves to the appropriate height for welding through other devices, the synchronous welding and separate welding of multiple welding guns are realized by setting the supporting block, the magnetic pad and the magnetic baffle; in the initial welding, after the two welding guns move to the corresponding to-be-welded parts, they are synchronously welded, at this time, the two magnetic pads are electrified, the magnetic baffle is not electrified, the two magnetic pads attract each other to keep stable, in the process of elongation and shortening of the driving hydraulic cylinder and the telescopic rod, they can slide on the magnetic baffle, after completing a synchronous welding, there may be a single-sided or both different places of incomplete welding, at this time, the magnetic pad at the incomplete welding place is continuously electrified, the magnetic baffle is also electrified, and the other magnetic pad is de-energized, at this time, the driving hydraulic cylinder and the telescopic rod at the incomplete welding place drive the moving device to move, and the welding is completed separately, thereby improving the efficiency of secondary welding. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a top view of the present application;

[0021] Figure 3 It is an A-A sectional view of Figure 2 ;

[0022] Figure 4 It is a B-B sectional view of Figure 2 ;

[0023] Figure 5 It is an internal side view of the present application;

[0024] Figure 6 It is a C partial enlarged view of Figure 5 ;

[0025] Figure 7 It is an internal top view of the present application;

[0026] Figure 8 This is a schematic diagram of the driving block of the present invention.

[0027] In the diagram: 1. Main body; 11. Mounting base; 111. Sliding groove; 12. Mounting frame; 13. Drive device; 131. Drive roller; 132. Drive track; 133. Drive motor; 2. Welding mechanism; 21. Moving device; 211. Servo motor; 212. Drive shaft; 213. Drive block; 22. Support block; 23. Magnetic pad; 24. Magnetic baffle; 25. Drive hydraulic cylinder; 26. Telescopic rod; 27. Welding assembly; 271. Welding torch; 272. Welding wire winding roller; 3. Multi-point synchronous positioning mechanism; 31. Photoresistor; 32. Emitting light source; 4. Preheating mechanism; 41. Hot air blower; 42. Air supply pipe; 43. Nozzle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example: Figures 1-8 As shown, the present invention provides a welding device with multi-point synchronous positioning function for skid-mounted separate cold boxes. The welding device welds the skid-mounted separate cold boxes. The welding device includes a main body 1, a welding mechanism 2, a multi-point synchronous positioning mechanism 3, and a preheating mechanism 4. The main body 1 and the welding mechanism 2 are connected. The main body 1 and the multi-point synchronous positioning mechanism 3 are connected. The welding mechanism 2 and the multi-point synchronous positioning mechanism 3 are connected. The welding mechanism 2 and the preheating mechanism 4 are connected.

[0030] In the welding device, the main body 1 provides the place where the cold box is welded and provides support for the welding. The welding mechanism 2 is used to weld the surface of the cold box. The multi-point synchronous positioning mechanism 3 is used to position the position to be welded, so that the welding mechanism 2 can perform welding. The preheating mechanism 4 is used to heat the positioned position to be welded, so as to avoid stress concentration during the welding process and affect the welding quality.

[0031] The main body mechanism 1 comprises a mounting base 11 and a mounting frame 12, the mounting base 11 is placed on the ground, the mounting base 11 and the mounting frame 12 are tightly connected, the mounting base 11 and the welding mechanism 2 are connected, the mounting base 11 and the preheating mechanism 4 are connected, the mounting frame 12 and the welding mechanism 2 are connected, the mounting frame 12 and the multi-point synchronous positioning mechanism 3 are connected, the main body mechanism 1 further comprises a driving device 13, the driving device 13 and the mounting base 11 are connected, the driving device 13 comprises a driving roller 131, a driving track 132 and a driving motor 133, the driving roller 131 is provided with two, the two driving rollers 131 are placed on both sides of the mounting base 11, the driving roller 131 and the side wall of the mounting base 11 are rotationally connected through a rotating rod, one driving roller 131 and the output end of the driving motor 133 are tightly connected, the fixed end of the driving motor 133 and the ground are tightly connected, the driving track 132 and the driving roller 131 are rotationally connected, the bottom of the mounting base 11 is provided with an opening, the lower half of the driving track 132 passes through the opening in the bottom of the mounting base 11, the upper half of the driving track 132 and the upper surface of the mounting base 11 are slidingly connected, and the driving track 132 is used for conveying the skid-mounted separation cold box.

[0032] In the main body mechanism 1, the mechanism is used for providing support for the cold box, the driving device 13 is used for driving the cold box to move to a specified position for welding, after the first welding is completed, the cold box is transported out and a new cold box to be welded is transported in, the driving motor 133 is started, so that the driving roller 131 rotates, thereby driving the driving track 132 to move, in the initial state, the cold box is placed in the driving track 132, after the driving motor 133 is started, the driving track 132 moves with the cold box, stops driving after moving to a suitable position, is positioned by the multi-point synchronous positioning mechanism 3, the preheating mechanism 4 preheats the welding part, the welding mechanism 2 welds, and after completion, the driving motor 133 is restarted, and the cold box is moved out of the welding area.

[0033] The welding mechanism 2 comprises two groups of moving devices 21, support blocks 22, magnetic pads 23 and magnetic baffles 24, the two groups of moving devices 21 are connected with the mounting frame 12 respectively, the moving devices 21 are connected with the support blocks 22, the moving devices 21 are connected with the multi-point synchronous positioning mechanism 3, the moving devices 21 are connected with the preheating mechanism 4, the moving devices 21 comprise servo motors 211, driving shafts 212 and driving blocks 213, the fixed end of the servo motor 211 is connected with the mounting frame 12 in sliding mode, the output end of the servo motor 211 is fixedly connected with the driving shaft 212, the driving shaft 212 is connected with the driving block 213 through screwing, the two driving shafts 212 are rotatably connected with the two support blocks 22 respectively at the ends away from the servo motor 211, the two magnetic pads 23 are fixedly connected with the two support blocks 22 respectively, the magnetic baffle 24 is fixedly connected with the mounting frame 12, the two magnetic pads 23 are slidably connected with the magnetic baffle 24, the magnetic pads 23 are respectively arranged on the two sides of the magnetic baffle 24, the driving block 213 is connected with the multi-point synchronous positioning mechanism 3, the welding mechanism 2 further comprises two driving hydraulic cylinders 25 and two telescopic rods 26, the two driving hydraulic cylinders 25 are arranged on the mounting base 11, the two telescopic rods 26 are arranged on the mounting base 11, two sliding grooves 111 are arranged on the mounting base 11, the two telescopic rods 26 are connected with the mounting base 11 respectively at one end, the two telescopic rods 26 are slidably connected with the two sliding grooves 111 respectively, the two telescopic rods 26 are fixedly connected with the two servo motors 211 respectively at the ends away from the mounting base 11, the driving hydraulic cylinders 25 are connected with the mounting base 11, the fixed end of the driving hydraulic cylinder 25 is fixedly connected with the wall surface of the sliding groove 111, and the output end of the driving hydraulic cylinder 25 is fixedly connected with the telescopic rod 26.

[0034] In the welding mechanism 2, the mechanism is used for welding the cold box to be welded part, driven by the moving device 21, the servo motor 211 and the mounting frame 12 are slidingly connected, the bottom and the telescopic rod 26 are tightly connected, the telescopic rod 26 is placed in the sliding groove 111, the telescopic rod 26 is driven to move left and right by the driving hydraulic cylinder 25, the telescopic rod 26 itself can move up and down with the servo motor 211, the magnetic baffle 24 and the mounting frame 12 are tightly connected, standing between the two servo motors 211, the magnetic baffle 24 and the magnetic pad 23 are both made of electromagnet material, with magnetism after electrification, can attract each other, the output end of the servo motor 211 and the driving shaft 212 are tightly connected, the other end of the driving shaft 212 and the supporting block 22 are tightly connected, the end of the supporting block 22 away from the driving shaft 212 and the magnetic pad 23 are tightly connected, the magnetic pad 23 and the magnetic baffle 24 are slidingly connected, in the state of synchronous welding, the two magnetic pads 23 are electrified, the magnetic baffle 24 is not electrified, the two magnetic pads 23 attract each other to keep stable, in the process of extension and shortening of the driving hydraulic cylinder 25 and the telescopic rod 26, it can slide on the magnetic baffle 24, after completing a synchronous welding, there may be single side or both exist different place leakage welding, at this time, the magnetic pad 23 of the leakage welding place is continuously electrified, the magnetic baffle 24 is also electrified, the other magnetic pad 23 is deenergized, at this time, the driving hydraulic cylinder 25 and the telescopic rod 26 of the leakage welding place drive, so that the moving device 21 moves, and the welding is completed alone.

[0035] The welding mechanism 2 further comprises a welding assembly 27, the welding assembly 27 and the moving device 21 are connected, the welding assembly 27 and the driving block 213 are connected, the welding assembly 27 comprises a welding gun 271 and a welding wire roller 272, the welding gun 271 and the welding wire roller 272 are provided with two, the two welding guns 271 are tightly connected with the bottom of the two driving blocks 213 respectively, the two welding wire rollers 272 are rotatably connected with the two driving blocks 213 through the rotating motor respectively, the welding wire roller 272 and the output end of the rotating motor are tightly connected, and the welding wire of the welding wire roller 272 faces the output end of the welding gun 271.

[0036] In the welding mechanism 2, the welding assembly 27 is further included, and the welding of the to-be-welded part is completed through the welding assembly 27, after the moving device 21 moves to the appropriate position, the welding gun 271 starts to work, and at the same time, the rotating motor starts to work, so that the welding wire roller 272 rotates to place the welding wire, the position where the welding wire is placed is just the position where the welding gun 271 welds, then the servo motor 211 starts to work, so that the driving shaft 212 rotates, the driving block 213 moves along the driving shaft 212, and the welding gun 271 and the welding wire roller 272 move and weld at the same time.

[0037] The multi-point synchronous positioning mechanism 3 comprises two photosensitive resistors 31 and two light emitting sources 32, the two photosensitive resistors 31 are fixedly connected to the bottom of the two driving blocks 213 respectively, and the two light emitting sources 32 are fixedly connected to the bottom of the two driving blocks 213 respectively.

[0038] In the multi-point synchronous positioning mechanism 3, the positions of the welding positions are determined by the photosensitive resistors 31 and the light emitting sources 32, the light emitting sources 32 and the photosensitive resistors 31 are fixed to the bottom of the driving blocks 213, in the process that the servo motors 211 drive the driving blocks 213 to move, the light emitting sources 32 are continuously started, the reflected laser light irradiates on the photosensitive resistors 31, the photoelectric effect is generated, the light signal is converted into the electric signal, for the welding position, compared with other positions, there is a gap, so it is deeper than other positions, the distance of the laser reflection is different, the intensity of the reflected light changes, the position of the light is shallower, the reflected light is stronger, and the photosensitive element generates a larger current; and the position of the light is deeper, the reflected light is weaker, and the generated current is relatively smaller, the specific position of the welding position is determined according to the current change, generally, the initial position of the driving block 213 is the position closest to the corresponding servo motor 211, after the position is determined, the driving hydraulic cylinder 25 and the telescopic rod 26 are driven to place the welding gun 271 at the appropriate position, the welding gun 271 is powered, the rotary motor drives the welding wire roller 272 to feed the welding wire, the servo motor 211 is started, and synchronous welding is performed, if the welding is performed separately, the driving hydraulic cylinder 25 and the telescopic rod 26 are driven to lift the welding gun 271, and the corresponding multi-point synchronous positioning mechanism 3 detects whether there is a missed welding in the process that the moving device 21 moves, if there is, the driving hydraulic cylinder 25 and the telescopic rod 26 are driven to lower the welding gun 271 to the appropriate position to perform repair welding.

[0039] The welding device further comprises a preheating mechanism 4, the preheating mechanism 4 is provided with two groups, the two groups of preheating mechanisms 4 are connected with the two groups of driving blocks 213 respectively, the preheating mechanism 4 comprises a hot air blower 41, an air supply pipe 42 and a nozzle 43, the hot air blower 41 is arranged on the mounting base 11, one end of the air supply pipe 42 is communicated with the hot air blower 41, the end of the air supply pipe 42 away from the hot air blower 41 is fixedly connected with the nozzle 43, the nozzle 43 is fixedly connected with the driving block 213, and the output end of the nozzle 43 faces the ground.

[0040] In the preheating mechanism 4, the mechanism heats the welding position before the welding mechanism 2 welds, so that the welding position has a certain initial temperature, which can not only assist better welding, but also reduce the local heat accumulation in the welding process, before the welding gun 271 welds, hot air is generated by the hot air blower 41, is transmitted to the nozzle 43 by the air supply pipe 42, and is sprayed to the welding position, so that the welding position is warmed up before welding, the temperature gradient in the welding process is reduced, the generation of thermal stress is reduced, and the welding quality is improved.

[0041] The working principle of the present application is as follows: after starting, the mobile device 21, the driving hydraulic cylinder 25 and the telescopic rod 26 are arranged to assist the movement of the welding gun 271, the multi-point synchronous positioning mechanism 3 is arranged to realize accurate positioning of the welding position, the photosensitive resistor 31 and the light emitting source 32 are arranged to position, in the process of moving and positioning the welding position of the welding gun 271, the light emitting source 32 is started, the reflected laser will irradiate on the photosensitive resistor 31, and the photoelectric effect will be generated to convert the optical signal into an electrical signal, there will be a gap in the welding position, so compared with other positions, it will be deeper, the distance of laser reflection is different, the intensity of reflected light will change, the position of the light is relatively shallow, and the photosensitive element will generate a larger current; while the position of the light is relatively deep, the reflected light is relatively weak, and the generated current is relatively small, the specific position of the welding position is determined according to the current change, the preheating mechanism 4 is arranged, after the welding position is determined, the preheating mechanism 4 sprays the hot gas in the hot air blower 41 from the nozzle 43 to the welding position through the air supply pipe 42, which assists the subsequent better welding, reduces the temperature gradient in the welding process, and then the welding gun 271 moves to the appropriate height for welding through other devices, the support block 22, the magnetic pad 23 and the magnetic baffle 24 are arranged to realize synchronous welding and separate welding of multiple welding guns 271, in the initial welding, after the two welding guns 271 move to the corresponding welding position, synchronous welding is carried out, at this time, the two magnetic pads 23 are electrified, the magnetic baffle 24 is not electrified, the two magnetic pads 23 are attracted to each other to keep stable, in the process of extension and shortening of the driving hydraulic cylinder 25 and the telescopic rod 26, the magnetic baffle 24 can slide on the magnetic baffle 24, after completing the synchronous welding once, there may be single-sided or both different leakage welding, at this time, the magnetic pad 23 of the leakage welding position is continuously electrified, the magnetic baffle 24 is also electrified, and the other magnetic pad 23 is de-energized, at this time, the driving hydraulic cylinder 25 and the telescopic rod 26 of the leakage welding position drive the movement of the mobile device 21 to complete the welding separately, thereby improving the efficiency of the secondary welding.

[0042] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A welding device with multi-point synchronous positioning function for a skid-mounted separation cold box, the welding device being used for welding the skid-mounted separation cold box, characterized in that: The welding device comprises a main body mechanism (1), a welding mechanism (2), a multi-point synchronous positioning mechanism (3) and a preheating mechanism (4), the main body mechanism (1) and the welding mechanism (2) are connected, the main body mechanism (1) and the multi-point synchronous positioning mechanism (3) are connected, the welding mechanism (2) and the multi-point synchronous positioning mechanism (3) are connected, and the welding mechanism (2) and the preheating mechanism (4) are connected; The main body mechanism (1) comprises a mounting base (11) and a mounting frame (12), the mounting base (11) is placed on the ground, the mounting base (11) and the mounting frame (12) are tightly connected, the mounting base (11) and the welding mechanism (2) are connected, the mounting base (11) and the preheating mechanism (4) are connected, the mounting frame (12) and the welding mechanism (2) are connected, and the mounting frame (12) and the multi-point synchronous positioning mechanism (3) are connected; The welding mechanism (2) comprises a moving device (21), a supporting block (22), a magnetic cushion block (23) and a magnetic baffle (24), the moving device (21) is provided with two groups, two groups of the moving device (21) are respectively connected with the mounting frame (12), the moving device (21) and the supporting block (22) are connected, the moving device (21) and the multi-point synchronous positioning mechanism (3) are connected, the moving device (21) and the preheating mechanism (4) are connected, the moving device (21) comprises a servo motor (211), a driving rotating shaft (212) and a driving block (213), the servo motor (211) is fixedly connected with the mounting frame (12) through sliding connection, the servo motor (211) is tightly connected with the driving rotating shaft (212) through the output end, the driving rotating shaft (212) and the driving block (213) are connected through threads, two ends of the driving rotating shaft (212) away from the servo motor (211) are respectively connected with the two supporting blocks (22) through rotation, the magnetic cushion block (23) is provided with two, two magnetic cushion blocks (23) are tightly connected with the two supporting blocks (22) respectively, the magnetic baffle (24) is tightly connected with the mounting frame (12), two magnetic cushion blocks (23) and the magnetic baffle (24) are connected through sliding, the magnetic cushion block (23) is respectively placed on both sides of the magnetic baffle (24), and the driving block (213) is connected with the multi-point synchronous positioning mechanism (3); The welding mechanism (2) further comprises a welding assembly (27), the welding assembly (27) is connected with the moving device (21), the welding assembly (27) is connected with the driving block (213), the welding assembly (27) comprises a welding gun (271) and a welding wire roll (272), the welding gun (271) and the welding wire roll (272) are provided with two, two welding guns (271) are tightly connected with the two driving blocks (213) at the bottom respectively, two welding wire rolls (272) are connected with the two driving blocks (213) through rotating motors, the welding wire roll (272) is tightly connected with the rotating motor through the output end, and the welding wire of the welding wire roll (272) is directed to the output end of the welding gun (271).

2. The welding device with multi-point synchronous positioning function for the skid-mounted separation cold box according to claim 1, characterized in that: The main body mechanism (1) further comprises a driving device (13), the driving device (13) is connected with the mounting base (11), the driving device (13) comprises a driving roller (131), a driving track (132) and a driving motor (133), the driving roller (131) is provided with two, two driving rollers (131) are arranged on both sides of the mounting base (11), the driving roller (131) is rotatably connected with the side wall of the mounting base (11) through a rotating rod, one driving roller (131) is fixedly connected with the output end of the driving motor (133), the fixed end of the driving motor (133) is fixedly connected with the ground, the driving track (132) is rotatably connected with the driving roller (131), the bottom of the mounting base (11) is provided with an opening, the lower half of the driving track (132) passes through the opening in the bottom of the mounting base (11), the upper half of the driving track (132) is slidably connected with the upper surface of the mounting base (11), and the driving track (132) is used for conveying the pry type separation cold box.

3. The welding device with multi-point synchronous positioning function for the skid-mounted separation cold box according to claim 1, characterized in that: The welding mechanism (2) further comprises a driving hydraulic cylinder (25) and a telescopic rod (26), the driving hydraulic cylinder (25) is provided with two, the telescopic rod (26) is provided with two, the mounting base (11) is provided with two sliding grooves (111), one end of the telescopic rod (26) is connected with the mounting base (11), the telescopic rod (26) is slidably connected with the sliding groove (111), the end of the telescopic rod (26) away from the mounting base (11) is fixedly connected with the two servo motors (211) respectively, the driving hydraulic cylinder (25) is connected with the mounting base (11), the fixed end of the driving hydraulic cylinder (25) is fixedly connected with the wall surface of the sliding groove (111), and the output end of the driving hydraulic cylinder (25) is fixedly connected with the telescopic rod (26).

4. The welding device with multi-point synchronous positioning function for the skid-mounted separation cold box according to claim 1, characterized in that: The multi-point synchronous positioning mechanism (3) comprises a photosensitive resistor (31) and a light emitting source (32), the photosensitive resistor (31) and the light emitting source (32) are provided with two, the two photosensitive resistors (31) are fixedly connected with the bottoms of the two driving blocks (213) respectively, and the two light emitting sources (32) are fixedly connected with the bottoms of the two driving blocks (213) respectively.

5. The welding device with multi-point synchronous positioning function for the skid-mounted separation cold box according to claim 1, characterized in that: The welding device further comprises a preheating mechanism (4), the preheating mechanism (4) is provided with two groups, two groups of the preheating mechanism (4) are connected with two groups of the driving blocks (213) respectively, the preheating mechanism (4) comprises a hot air blower (41), a blowing pipe (42) and a nozzle (43), the hot air blower (41) is arranged on the mounting base (11), one end of the blowing pipe (42) is communicated with the hot air blower (41), the end of the blowing pipe (42) away from the hot air blower (41) is fixedly connected with the nozzle (43), the nozzle (43) is fixedly connected with the driving block (213), and the output end of the nozzle (43) faces the ground.

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