A welding device for explosion-proof metal shield of camera

Abstract

The present invention belongs to the field of welding technology, and in particular, relates to a welding device for a camera explosion-proof metal shield, comprising a fixing frame and a welding machine, wherein the welding machine is fixedly arranged on the inner side wall of the fixing frame, a working plate is fixedly arranged in the fixing frame, a bearing seat is rotatably connected to the working plate, a placement groove is arranged in the middle of the upper surface of the bearing seat, a positioning mechanism for fixing the explosion-proof shield is arranged in the placement groove, a hydraulic cylinder is arranged on the inner top surface of the fixing frame, a lifting plate is fixedly connected to the output end of the hydraulic cylinder, an inner support cylinder is fixedly connected to the bottom surface of the lifting plate, and the lifting plate is connected to the positioning mechanism through a transmission mechanism. The present invention can support the inner wall of the explosion-proof shield through the inner support cylinder to prevent it from being deformed due to high temperature, clamp and fix the explosion-proof shield through the positioning mechanism to prevent the explosion-proof shield from slipping during welding, and automatically blow away the welding chips in the placement groove through the chip removal mechanism to avoid the accumulation of welding chips in the placement groove.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a welding device for an explosion-proof metal shield of a camera. Background Art

[0002] Explosion-proof cameras are special cameras developed to realize the application of industrial television in flammable and explosive on-site environments. Explosion-proof cameras need to be installed in working environments such as gas stations and mines to monitor the safe operation of equipment and dangerous disaster factors in real time. The explosion-proof shield of the camera is mostly assembled from several sections of cylindrical explosion-proof shells. During the production process, the cylindrical explosion-proof shells need to be welded and fixed together by welding devices.

[0003] After searching, the national patent number CN104084718B discloses an automatic ring welding device with a protective cover for easy unloading, including a fixed frame and a welding machine. A positioning cylinder is provided in the middle position of the upper end of the fixed frame, a material receiving plane is provided below the positioning cylinder, a second rotating shaft is provided below the material receiving plane, the upper and lower ends of the second rotating shaft are fixed to the fixed frame through bearings, a transmission wheel is provided in the middle position of the second rotating shaft, the transmission wheel is connected to the output shaft of the driving motor through a belt, the driving motor is fixedly mounted on the lower end of the fixed frame, the upper end of the second rotating shaft extends to the upper end surface of the material receiving plane, a hole matching the rotating shaft is provided on the material receiving plane, a switch in contact with the welding head is provided at the front end of the cylinder, and protective bodies are provided on both sides of the fixed frame.

[0004] The above scheme has the following deficiencies:

[0005] 1. It does not have the function of fixing the workpiece. During the welding process in which the fixed sleeve drives the workpiece to rotate, the workpiece is prone to slip, causing the welding position to shift, thus affecting the welding quality;

[0006] Due to the high welding temperature, the workpiece is easily affected by the high temperature and deformed during the working process, thereby reducing the product quality and the product qualification rate;

[0007] A large amount of welding shavings will be generated during welding. The welding shavings will fall and accumulate on the work platform, which will affect the placement of the workpieces and require frequent manual cleaning, which is labor-intensive and inconvenient to use.

[0008] After welding, the surface temperature of the workpiece is high and the workpiece needs to be removed after natural cooling or by using specific tools, which is troublesome and not conducive to improving work efficiency. Summary of the invention

[0009] The purpose of the present invention is to provide a camera explosion-proof metal shield welding device with good welding effect and high working efficiency in view of the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a welding device for a camera explosion-proof metal shield, comprising a fixing frame and a welding machine, the welding machine is fixedly arranged on the inner side wall of the fixing frame, a working plate is fixedly arranged in the fixing frame, a bearing seat is rotatably connected to the working plate, a placement groove is arranged in the middle of the upper surface of the bearing seat, a positioning mechanism for fixing the explosion-proof shield is arranged in the placement groove, a hydraulic cylinder is arranged on the inner top surface of the fixing frame, a lifting plate is fixedly connected to the output end of the hydraulic cylinder, an inner support cylinder is fixedly connected to the bottom surface of the lifting plate, and the lifting plate is connected to the positioning mechanism through a transmission mechanism;

[0011] The transmission mechanism includes a cavity arranged in the bearing seat, the cavity is in a U-shaped structure, a bidirectional worm is arranged in the cavity, both ends of the bidirectional worm are provided with helical teeth, and the spiral directions of the helical teeth at both ends of the bidirectional worm are opposite, both ends of the bidirectional worm are rotatably connected to the inner wall of the cavity through a disc spring, both ends of the bidirectional worm are fixedly connected to a winding wheel, two fixed pulleys are fixedly installed on the inner wall of the fixed frame, the two fixed pulleys are symmetrically arranged, and a pull rope is wound around the two fixed pulleys, one end of the pull rope is fixed to the lifting plate, and the other end extends into the cavity and is wound around the winding wheel, and a chip removal mechanism is provided on the bidirectional worm;

[0012] The chip removal mechanism includes an air collecting box fixedly connected to the inner wall of the cavity, the air collecting box is connected to an air duct, a pressure valve is provided at the connection between the air duct and the air collecting box, the output end of the air duct extends into the placement groove, a cooling rod is provided on the air collecting box, the cold end of the cooling rod is wrapped around the air duct, and the hot end extends into the air collecting box, and a control mechanism for controlling the on and off of the cooling rod is provided at the bottom of the inner support cylinder.

[0013] Furthermore, the chip removal mechanism also includes a star-shaped cam fixedly connected to the bidirectional worm gear, an air pump fixedly connected to the air collecting box, the output end of the air pump is connected to the interior of the air collecting box, a transmission rod fixedly connected to the valve stem of the air pump, one end of the transmission rod extends out of the air pump and is fixedly provided with a rotor, and the rotor slides against the circumferential side wall of the star-shaped cam.

[0014] Furthermore, the control mechanism includes a conductive head fixedly arranged at the bottom of the inner support tube, an elastic retaining ring is provided on the outer sleeve of the conductive head, the elastic retaining ring is fixedly connected to the inner support tube, and the bottom surface of the placement groove is provided with a power connection plate matching the conductive head, and the cooling rod is electrically connected to the external power supply through the conductive head and the power connection plate.

[0015] Furthermore, the positioning mechanism includes two clamping plates symmetrically arranged in the placement groove, and racks are fixedly connected to the opposite side walls of the two clamping plates, and one end of the rack away from the clamping plate extends into the cavity.

[0016] Furthermore, the positioning mechanism also includes two rotating shafts rotatably connected to the cavity, each of the rotating shafts is fixedly connected with a gear and a worm wheel, the two gears are respectively meshed with two racks, and the two worm wheels are respectively meshed with two ends of the bidirectional worm.

[0017] Furthermore, the clamping plate is arranged in an arc shape, and a flexible heat insulation plate is fixedly connected to the inner arc surface of the clamping plate.

[0018] Furthermore, it also includes a driving mechanism for driving the supporting seat to rotate, the driving mechanism includes a driving motor installed at the bottom of the fixing frame, the supporting seat is fixedly connected to a rotating shaft, and the output shaft of the driving motor is transmission-connected to the rotating shaft through a reduction gear set.

[0019] Furthermore, a plurality of rotating rings are sleeved on the outer ring side wall of the inner support tube, and the plurality of rotating rings are arranged equidistantly along the axial direction of the inner support tube, and the rotating rings are rotatably connected to the inner support tube via bearings.

[0020] The present invention has the following advantages:

[0021] The present invention arranges an inner support cylinder. When the explosion-proof shield is welded, the lifting plate is driven downward by the hydraulic cylinder, so that the inner support cylinder extends into the explosion-proof shield. The rotating ring on the inner support cylinder contacts the inner wall of the explosion-proof shield. On the one hand, the explosion-proof shield can be limited to prevent it from moving during the welding process. On the other hand, the inner wall of the explosion-proof shield can be supported to prevent it from being deformed due to high temperature, thereby ensuring product quality and improving product qualification rate.

[0022] The present invention sets a positioning mechanism and uses the lifting plate as a driving force to drive the two clamping plates to move. The explosion-proof shield can be clamped and fixed during the welding process to prevent the explosion-proof shield from slipping during the welding process, which causes the welding position to shift and ensures the welding quality. After the welding is completed, the clamping plate automatically moves in the opposite direction and resets to release the explosion-proof shield. Compared with the prior art, the degree of automation is high, no manual operation is required, the labor intensity and danger are reduced, and there is no need to set up an additional driving device.

[0023] The present invention provides a chip removal mechanism, and air can be blown into the placement groove before and after welding to blow away the welding chips in the placement groove, thereby avoiding accumulation of welding chips in the placement groove and affecting the welding work.

[0024] The present invention arranges a cooling rod, and the cooling rod works during the welding process. The cold end of the cooling rod can cool the air duct, so that the temperature of the air decreases when passing through the air duct. The cold air is blown into the placement groove, and the welded explosion-proof shield can be quickly cooled, which is convenient for taking out. The hot end of the cooling rod can heat the inside of the air collecting box, increase the thermal pressure in the air collecting box, and make the kinetic energy of the air in the air collecting box larger when it is ejected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a camera explosion-proof metal shield welding device provided by the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of a bearing seat in a welding device for a camera explosion-proof metal shield provided by the present invention;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0029] Figure 5 It is a schematic diagram of the top view structure of a clamping plate in a welding device for a camera explosion-proof metal shield provided by the present invention;

[0030] Figure 6 It is a side structural schematic diagram of a star-shaped cam in a welding device for an explosion-proof metal shield of a camera provided by the present invention;

[0031] Figure 7 It is a three-dimensional diagram of an inner support cylinder in a welding device for a camera explosion-proof metal shield provided by the present invention;

[0032] Figure 8 yes Figure 7 Enlarged view of point C in the middle.

[0033] In the figure, 1 is a fixed frame, 2 is a welding machine, 3 is a working plate, 4 is a bearing seat, 5 is a placement groove, 6 is a hydraulic cylinder, 7 is a lifting plate, 8 is an inner support cylinder, 9 is a rotating shaft, 10 is a cavity, 11 is a bidirectional worm, 12 is a coil spring, 13 is a winding wheel, 14 is a fixed pulley, 15 is a pull rope, 16 is an air collecting box, 17 is an air guide tube, 18 is a cooling rod, 19 is a rotating ring, 20 is a star cam, 21 is an air pump, 22 is a transmission rod, 23 is a rotor, 24 is a conductive head, 25 is a circlip, 26 is a power connection plate, 27 is a clamping plate, 28 is a rack, 29 is a rotating shaft, 30 is a gear, 31 is a worm wheel, 32 is a flexible heat insulation board, and 33 is a driving motor. DETAILED DESCRIPTION

[0034] like Figure 1-8As shown, a camera explosion-proof metal shield welding device includes a fixing frame 1 and a welding machine 2, the welding machine 2 is fixedly arranged on the inner side wall of the fixing frame 1, a working plate 3 is fixedly arranged in the fixing frame 1, a bearing seat 4 is rotatably connected to the working plate 3, a placement groove 5 is arranged in the middle of the upper surface of the bearing seat 4, a positioning mechanism for fixing the explosion-proof shield is arranged in the placement groove 5, a hydraulic cylinder 6 is arranged on the inner top surface of the fixing frame 1, a lifting plate 7 is fixedly connected to the output end of the hydraulic cylinder 6, an inner support tube 8 is fixedly connected to the bottom surface of the lifting plate 7, and the lifting plate 7 is connected to the positioning mechanism through a transmission mechanism.

[0035] The transmission mechanism includes a cavity 10 arranged in the bearing seat 4, the cavity 10 is in a U-shaped structure, a bidirectional worm 11 is arranged in the cavity 10, both ends of the bidirectional worm 11 are provided with helical teeth, and the helical directions of the helical teeth at both ends of the bidirectional worm 11 are opposite, both ends of the bidirectional worm 11 are rotatably connected to the inner wall of the cavity 10 through a disc spring 12, both ends of the bidirectional worm 11 are fixedly connected to a winding wheel 13, and two fixed pulleys 14 are fixedly installed on the inner wall of the fixed frame 1, the two fixed pulleys 14 are symmetrically arranged, and the two A pull rope 15 is wound around the fixed pulley 14, one end of the pull rope 15 is fixed to the lifting plate 7, and the other end extends into the cavity 10 and is wound around the winding wheel 13. A chip removal mechanism is provided on the bidirectional worm 11. During the downward movement of the lifting plate 7, the winding wheel 13 can be driven to rotate by the pull rope 15, that is, the rotation of the bidirectional worm 11 is driven, and the coil spring 12 is deformed and tightened. When the lifting plate 7 moves up and resets, under the elastic force of the coil spring 12, the bidirectional worm 11 rotates in the opposite direction to reset, and the winding wheel 13 rotates in the opposite direction to rewind the pull rope 15.

[0036] The chip removal mechanism includes an air collecting box 16 fixedly connected to the inner wall of the cavity 10, the air collecting box 16 is connected to an air guide tube 17, a pressure valve is provided at the connection between the air guide tube 17 and the air collecting box 16, the output end of the air guide tube 17 extends into the placement groove 5, and a cooling rod 18 is provided on the air collecting box 16. The cooling rod 18 is made of semiconductor material. By utilizing the Peltier effect of the semiconductor material, when direct current passes through a couple formed by two different semiconductor materials connected in series, the two ends of the couple can absorb the Heat is collected and released, the cold end of the cooling rod 18 is wrapped around the air duct 17, and the hot end extends into the air collecting box 16. The cold end of the cooling rod 18 can cool the air duct 17, so that the temperature of the air is reduced when passing through the air duct 17. The cold air is blown into the placement slot 5, which can quickly cool the welded explosion-proof shield for easy removal. The hot end of the cooling rod 18 can heat the inside of the air collecting box 16, increase the thermal pressure in the air collecting box 16, and make the kinetic energy of the air in the air collecting box 16 greater when it is ejected.

[0037] The chip removal mechanism also includes a star cam 20 fixedly connected to the bidirectional worm 11, an air pump 21 fixedly connected to the air collecting box 16, the output end of the air pump 21 is connected to the inside of the air collecting box 16, and a one-way valve is provided at the connection point, so that the air in the air pump 21 flows unidirectionally into the air collecting box 16, a transmission rod 22 is fixedly connected to the valve stem of the air pump 21, one end of the transmission rod 22 extends out of the air pump 21 and is fixedly provided with a rotor 23, the rotor 23 slides against the peripheral side wall of the star cam 20, and the bidirectional worm 11 is fixedly provided with a rotor 23. When the worm gear 11 drives the star cam 20 to rotate, the rotor 23 slides against the circumferential wall of the star cam 20, and the transmission rod 22 is driven to move back and forth through the rotor 23, and then the valve stem in the air pump 21 moves back and forth, and the air pump 21 continuously pumps air into the air collecting box 16. When the air pressure in the air collecting box 16 reaches the critical value of the pressure valve, the air is ejected into the placement groove 5 through the air guide pipe 17, and the welding chips in the placement groove 5 are blown away, so as to avoid the accumulation of welding chips in the placement groove 5 and the influence on the welding work.

[0038] A control mechanism for controlling the on and off of the cooling rod 18 is provided at the bottom of the inner support tube 8. The control mechanism includes a conductive head 24 fixedly arranged at the bottom of the inner support tube 8. An elastic retaining ring 25 is provided on the outer sleeve of the conductive head 24. The elastic retaining ring 25 can form a protection for the conductive head 24 in a natural state. When under pressure, it shrinks so that the conductive head 24 leaks out. At this time, the conductive head 24 can contact the power connection plate 26. The elastic retaining ring 25 is fixedly connected to the inner support tube 8. The bottom surface of the placement groove 5 is provided with a power connection plate 26 matching the conductive head 24. The cooling rod 18 is electrically connected to the external power supply through the conductive head 24 and the power connection plate 26. The inner support tube 8 moves down into the explosion-proof shield so that the conductive head 24 contacts the power connection plate 26, thereby turning on the circuit of the cooling rod 18.

[0039] The positioning mechanism includes two clamping plates 27 symmetrically arranged in the placement groove 5 , and racks 28 are fixedly connected to the opposite side walls of the two clamping plates 27 , and one end of the rack 28 away from the clamping plates 27 extends into the cavity 10 .

[0040] The positioning mechanism also includes two rotating shafts 29 rotatably connected to the cavity 10 , each rotating shaft 29 is fixedly connected to a gear 30 and a worm wheel 31 , the two gears 30 are respectively meshed with the two racks 28 , and the two worm wheels 31 are respectively meshed with the two ends of the bidirectional worm 11 .

[0041] The clamping plate 27 is arranged in an arc shape, and a flexible heat insulation plate 32 is fixedly connected to the inner arc surface of the clamping plate 27. The flexible heat insulation plate 32 adopts organic heat insulation material to form heat insulation protection for the clamping plate 27, and has good deformation ability to avoid squeezing the explosion-proof shield during the tightening and fixing process, thereby preventing the explosion-proof shield from being deformed.

[0042] It also includes a driving mechanism for driving the supporting seat 4 to rotate, and the driving mechanism includes a driving motor 33 installed at the bottom of the fixing frame 1. The supporting seat 4 is fixedly connected to a rotating shaft 9. The output shaft of the driving motor 33 is connected to the rotating shaft 9 through a reduction gear set. The reduction gear set is a prior art in this field and will not be described in detail here. The driving motor 33 can drive the rotating shaft 9 to rotate through the reduction gear set, and then drive the explosion-proof shield to rotate through the supporting seat 4, and the explosion-proof shield is seamlessly welded by the welding machine 2.

[0043] A plurality of rotating rings 19 are sleeved on the outer ring side wall of the inner support tube 8, and the plurality of rotating rings 19 are equidistantly arranged along the axial direction of the inner support tube 8. The rotating rings 19 are rotatably connected to the inner support tube 8 through bearings. The rotating rings 19 on the inner support tube 8 are in contact with the inner wall of the explosion-proof shield. On the one hand, the explosion-proof shield can be limited to prevent it from moving during welding. On the other hand, the inner wall of the explosion-proof shield can be supported to prevent it from being deformed due to high temperature, thereby ensuring product quality and improving product qualification rate.

[0044] The working principle of this embodiment is as follows: the explosion-proof shield to be welded is placed in the placement groove 5, and the lifting plate 7 is driven downward by the hydraulic cylinder 6, so that the inner support tube 8 moves downward and extends into the explosion-proof shield, and the rotating ring 19 on the inner support tube 8 contacts the inner wall of the explosion-proof shield. On the one hand, the explosion-proof shield can be limited to prevent it from moving during the welding process. On the other hand, the inner wall of the explosion-proof shield can be supported to prevent it from being deformed due to high temperature, thereby ensuring product quality and improving product qualification rate.

[0045] During the downward movement of the lifting plate 7, the winding wheel 13 is driven to rotate through the pull rope 15, so that the bidirectional worm 11 is driven to rotate, the coil spring 12 is deformed and tightened, and the bidirectional worm 11 drives the two worm wheels 31 meshing therewith to rotate. When the worm wheel 31 rotates, the gear 30 is driven to rotate synchronously through the rotating shaft 29. Because the gear 30 is meshed with the rack 28, the two clamping plates 27 are driven to approach each other, and the explosion-proof shield to be welded is clamped and fixed, so as to prevent the explosion-proof shield from slipping during the welding process, resulting in the welding position being offset, thereby ensuring the welding quality.

[0046] The driving motor 33 is started to drive the rotating shaft 9 to rotate through the reduction gear set, and then the explosion-proof shield is driven to rotate through the bearing seat 4, and the explosion-proof shield is seamlessly welded by the welding machine 2.

[0047] After welding is completed, when the hydraulic cylinder 6 lifts the plate 7 upward and resets, the bidirectional worm 11 rotates in the opposite direction and resets under the elastic force of the coil spring 12, and the winding wheel 13 rotates in the opposite direction to reel in the pull rope 15, and under the transmission of the worm wheel 31, the gear 30 and the rack 28, the two clamping plates 27 move away from each other and reset, and the explosion-proof shield is released.

[0048] When the bidirectional worm gear 11 rotates, it drives the star cam 20 to rotate. Since the rotor 23 slides against the circumferential wall of the star cam 20, the transmission rod 22 is driven to move back and forth through the rotor 23, and then the valve stem in the air pump 21 moves back and forth. The air pump 21 continuously pumps air into the air collecting box 16. When the air pressure in the air collecting box 16 reaches the critical value of the pressure valve, the air is ejected from the air guide pipe 17 into the placement groove 5, and the welding chips in the placement groove 5 are blown away, so as to avoid the accumulation of welding chips in the placement groove 5 and affect the welding work.

[0049] During the welding process, the inner support tube 8 moves down into the explosion-proof shield, so that the conductive head 24 contacts the power connection plate 26, and the circuit of the cooling rod 18 is turned on. The cold end of the cooling rod 18 can cool the air duct 17, so that after the welding is completed, the temperature of the air decreases when passing through the air duct 17, and the cold air is blown into the placement groove 5, which can quickly cool the welded explosion-proof shield for easy removal. The hot end of the cooling rod 18 can heat the inside of the air collecting box 16, increase the thermal pressure inside the air collecting box 16, and make the kinetic energy of the air in the air collecting box 16 greater when it is ejected.

Claims

1. A welding device for an explosion-proof metal shield of a camera, comprising a fixing frame (1) and a welding machine (2), wherein the welding machine (2) is fixedly arranged on the inner side wall of the fixing frame (1), and is characterized in that: A working plate (3) is fixedly arranged inside the fixing frame (1), a bearing seat (4) is rotatably connected to the working plate (3), a placement groove (5) is arranged in the middle of the upper surface of the bearing seat (4), a positioning mechanism for fixing the explosion-proof shield is arranged in the placement groove (5), a hydraulic cylinder (6) is arranged on the inner top surface of the fixing frame (1), a lifting plate (7) is fixedly connected to the output end of the hydraulic cylinder (6), an inner support cylinder (8) is fixedly connected to the bottom surface of the lifting plate (7), and the lifting plate (7) is connected to the positioning mechanism via a transmission mechanism; The transmission mechanism comprises a cavity (10) arranged in the bearing seat (4), the cavity (10) being in a U-shaped structure, a bidirectional worm (11) being arranged in the cavity (10), both ends of the bidirectional worm (11) being provided with helical teeth, and the helical directions of the helical teeth at both ends of the bidirectional worm (11) being opposite, both ends of the bidirectional worm (11) being rotatably connected to the inner wall of the cavity (10) via a disc spring (12), both ends of the bidirectional worm (11) being fixedly connected to a winding wheel (13), two fixed pulleys (14) being fixedly mounted on the inner wall of the fixed frame (1), the two fixed pulleys (14) being symmetrically arranged, and a pull rope (15) being wound around the two fixed pulleys (14), one end of the pull rope (15) being fixed to the lifting plate (7), and the other end extending into the cavity (10) and being wound around the winding wheel (13), and a chip removal mechanism being arranged on the bidirectional worm (11); The chip removal mechanism comprises an air collecting box (16) fixedly connected to the inner wall of the cavity (10), the air collecting box (16) being connected to an air guide pipe (17), a pressure valve being provided at the connection point between the air guide pipe (17) and the air collecting box (16), an output end of the air guide pipe (17) extending into the placement groove (5), a cooling rod (18) being provided on the air collecting box (16), a cold end of the cooling rod (18) being wound around the air guide pipe (17), and a hot end extending into the air collecting box (16), and a control mechanism for controlling the on and off of the cooling rod (18) being provided at the bottom of the inner support cylinder (8); The chip removal mechanism also includes a star cam (20) fixedly connected to the bidirectional worm gear (11); an air pump (21) is fixedly connected to the air collecting box (16); an output end of the air pump (21) is communicated with the interior of the air collecting box (16); a transmission rod (22) is fixedly connected to a valve stem of the air pump (21); one end of the transmission rod (22) extends out of the air pump (21) and is fixedly provided with a rotor (23); the rotor (23) slides against a peripheral wall of the star cam (20); The control mechanism comprises a conductive head (24) fixedly arranged at the bottom of the inner support tube (8); an outer cover of the conductive head (24) is provided with an elastic retaining ring (25); the elastic retaining ring (25) is fixedly connected to the inner support tube (8); the bottom surface of the placement groove (5) is provided with an electrical connection plate (26) matching the conductive head (24); and the cooling rod (18) is electrically connected to an external power source via the conductive head (24) and the electrical connection plate (26).

2. The camera explosion-proof metal shield welding device according to claim 1, characterized in that: The positioning mechanism comprises two clamping plates (27) symmetrically arranged in the placement groove (5), and racks (28) are fixedly connected to the opposite side walls of the two clamping plates (27), and one end of the rack (28) away from the clamping plates (27) extends into the cavity (10).

3. The camera explosion-proof metal shield welding device according to claim 2, characterized in that: The positioning mechanism further comprises two rotating shafts (29) rotatably connected to the cavity (10), each of the rotating shafts (29) being fixedly connected to a gear (30) and a worm wheel (31), the two gears (30) respectively meshing with the two racks (28), and the two worm wheels (31) respectively meshing with two ends of the bidirectional worm (11).

4. The camera explosion-proof metal shield welding device according to claim 2, characterized in that: The clamping plate (27) is arranged in an arc shape, and a flexible heat insulation plate (32) is fixedly connected to the inner arc surface of the clamping plate (27).

5. The camera explosion-proof metal shield welding device according to claim 1, characterized in that: It also includes a driving mechanism for driving the bearing seat (4) to rotate, the driving mechanism including a driving motor (33) mounted on the bottom of the fixing frame (1), the bearing seat (4) being fixedly connected to a rotating shaft (9), and the output shaft of the driving motor (33) being transmission-connected to the rotating shaft (9) via a reduction gear set.

6. The camera explosion-proof metal shield welding device according to claim 1, characterized in that: A plurality of rotating rings (19) are sleeved on the outer ring side wall of the inner support tube (8), and the plurality of rotating rings (19) are arranged equidistantly along the axial direction of the inner support tube (8). The rotating rings (19) are rotatably connected to the inner support tube (8) via bearings.

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