Automatic welding equipment for hollow plate

Abstract

The invention relates to the technical field of hollow plate welding, and discloses a hollow plate automatic welding device which comprises a machining table, a conveying assembly is arranged in the middle of the machining table and used for conveying a to-be-welded hollow plate to a welding area and conveying the hollow plate to a supporting table after welding is completed, and the hollow plate is pushed to a qualified or unqualified collecting area through a distributing assembly. The conveying assembly operates to drive the correcting assembly to operate synchronously, the position of the hollow plate in the moving process is corrected, a discharging box is arranged at the end, in the direction right opposite to the supporting table, of the machining table, and a first outlet adjusting assembly is arranged at the bottom of the outer wall of the discharging box. By integrating multifunctional point welding and the clamping assembly, high-precision welding of the side edge of a hollow plate box and a stable part can be achieved, the application range of equipment is expanded, intelligent quality detection and automatic sorting are achieved through the central processing system in combination with the infrared thermal imaging camera and the material distribution assembly, manual quality inspection is reduced, and the production efficiency is improved. And the automation level is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hollow plate welding, in particular to automatic hollow plate welding equipment. Background Art

[0002] Hollow board is widely used in packaging, logistics, transportation, construction and other fields due to its light weight, high strength and environmental protection, and has become one of the important industrial materials. In these application scenarios, with the continuous improvement of product quality and production efficiency, automated welding technology has gradually become one of the key links in the production and processing of hollow boards. The degree of automation of hollow board welding equipment directly affects the work efficiency of the production line, the stability of welding quality and production cost control. Therefore, the demand for hollow board welding equipment with high precision, high efficiency and intelligence is growing.

[0003] However, the existing hollow plate welding equipment still has great limitations in automation and intelligence, and it is difficult to meet the high requirements of modern industrial production lines. First of all, the automation level of these equipment is generally low, and usually requires a lot of manual intervention. For example, during the welding process, operators need to frequently perform manual adjustments and quality inspections, which not only increases the labor intensity of workers, but also leads to reduced production efficiency. For large-scale industrial production needs, this low-automation operation mode limits the possibility of continuous production and affects the overall efficiency of the production line.

[0004] In terms of welding quality control and inspection, existing equipment lacks intelligent inspection methods. Usually, after welding, the hollow plate needs to be manually inspected for welding quality to determine whether it is qualified. This method is not only time-consuming and labor-intensive, but also has the risk of misjudgment caused by human factors, which can easily cause unqualified products to flow into subsequent links and affect the overall quality of the product. In addition, the efficiency of manual quality inspection is relatively low, and it is difficult to keep up with the rhythm of the production line, further slowing down the production speed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides automatic hollow plate welding equipment, which solves the problems of low automation, unstable welding quality, lack of intelligent detection and high manual operation intensity of the existing hollow plate welding equipment.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: automatic welding equipment for hollow plates, including a processing table, a conveying component is arranged in the middle of the processing table, which is used to convey the hollow plate to be welded to the welding area, and convey it to the support table after welding, and is pushed to the qualified or unqualified collection area by the material separation component, and the correction component is driven to run synchronously by the operation of the conveying component to correct the position of the hollow plate during the movement, a material discharge box is arranged at the end of the processing table opposite to the support table, a first outlet adjustment component is arranged at the bottom of the outer wall of the material discharge box, and a material discharge component is arranged at the bottom, a conveying table is arranged on the outer wall of the material discharge box just above the first outlet adjustment component, a plurality of electric rollers are arranged in the middle of the conveying table, a material discharge box is installed on the outer wall of the material discharge box above the conveying table, and a second outlet adjustment component is arranged at the bottom of the outer wall of the material discharge box;

[0007] Mounting frames are installed on both sides of the top of the processing table, and the outer walls of the two mounting frames are connected to mounting beams. A crossbeam is connected between the mounting beams on both sides, and an infrared thermal imaging camera is installed at the bottom of the crossbeam. A layering mechanism is provided between the mounting beams on both sides, which is used to separate the upper and lower layers of the two layers of hollow panels in a folded state after pretreatment, leaving a region for allowing the positioning component to enter the two layers of hollow panels. The positioning component is located at the bottom of the welding seam, and cooperates with the top side welding component to weld the top middle seam of the folded hollow panel. A point welding mechanism is provided on the outer wall of the side welding component, which is used to weld the hollow panel stabilizing piece clamped by the bottom clamping component to the large hollow panel on the conveying component.

[0008] Preferably, the conveying assembly comprises a plurality of conveying rollers, which are sequentially arranged in the middle of the processing table, one end of each adjacent two conveying rollers are connected by a belt transmission member, and a motor is installed at the other end of any one of the conveying rollers;

[0009] The correction assembly includes two groups of reciprocating screws, one end of the two groups of reciprocating screws are respectively installed at the two ends of two conveying rollers, the other ends of the two groups of reciprocating screws are rotated with a same frequency plate, the outer wall of the reciprocating screws on the same side is threadedly connected with a moving seat, and a rectangular frame is installed on the top of the moving seat on the same side, both sides of the rectangular frame are penetrated by a slide groove, a mounting plate is slid in the middle of the slide groove, one side of the mounting plate is connected to multiple springs, the other ends of the multiple springs are installed on the inner wall of the rectangular frame, the other side of the mounting plate is connected to multiple moving rods, the other ends of the multiple moving rods are connected to a push plate, and the outer walls of the multiple moving rods slide in the middle of the rectangular frame.

[0010] Preferably, the first outlet adjustment component includes two fixed blocks, the two fixed blocks are respectively installed on both sides of the discharge box, an adjusting screw is rotated in the middle of the two fixed blocks, a knob is installed on the top of each adjusting screw, the outer walls of the two adjusting screws are threadedly connected with a U-shaped adjustment plate, and the outer wall of the U-shaped adjustment plate is arranged on the outer wall of the discharge box.

[0011] Preferably, the discharging assembly includes two electric telescopic rods, one end of the two electric telescopic rods is rotated on the outer wall of the processing table, the other ends of the two electric telescopic rods are rotated with connecting parts through movable parts, L-shaped push blocks are installed on the top of the two connecting parts, and limiting blocks are fixed on both sides of the outer wall of each L-shaped push block. Through grooves are opened on both sides of the bottom of the discharge box, and limiting grooves are opened on both sides of the inner walls of the two through grooves. The outer wall of each limit block slides on the inner wall of the limiting groove on the corresponding side, and installation grooves are penetrated in the middle of both sides of the top of the discharge box, and multiple rollers are rotated inside the two installation grooves.

[0012] Preferably, the second outlet adjustment component includes two fixed blocks 2, and the two fixed blocks 2 are respectively installed on both sides of the material discharge box, and an adjusting screw 2 is rotated in the middle of the two fixed blocks 2, and a knob 2 is installed on the top of each adjusting screw 2, and the outer walls of the two adjusting screws 2 are threadedly connected with a U-shaped adjustment plate 2, and the outer wall of the U-shaped adjustment plate 2 is set on the outer wall of the material discharge box.

[0013] Preferably, the stratification mechanism comprises two bidirectional screw rods 1, the two bidirectional screw rods 1 are threadedly connected to the middle of the mounting beams on both sides, the two bidirectional screw rods 1 are connected by a belt transmission member 2, one end of the bidirectional screw rods 1 is installed with a motor 2, both sides of the two bidirectional screw rods 1 are threadedly connected with moving blocks, the bottom of each moving block is installed with an electric telescopic rod 2, the driving end of the electric telescopic rod 2 on the same side is installed with a mounting plate 2, and the outer wall of the mounting plate 2 is installed with a plurality of clamping nozzle assemblies, which are used to clamp the top hollow plate to separate it from the bottom hollow plate;

[0014] Each of the clamping nozzle assemblies includes two movable clamping plates, the ends of the two movable clamping plates are rotated on the outer wall of the second mounting plate, the opposite sides of the two movable clamping plates are connected by spring two, an electric telescopic rod three is rotated in the middle of the movable clamping plate on one side, and the driving end of the electric telescopic rod three is rotated in the middle of the movable clamping plate on the other side through a rotating member.

[0015] Preferably, the side welding assembly includes two linear guide rails 1, and the two linear guide rails 1 are respectively mounted on the outer walls of mounting frames 1 on both sides, and the outer walls of the two linear guide rails 1 are each provided with a slider, and mounting frames 2 are mounted on the bottom of the two sliders, and mounting seats are mounted on the bottom of the mounting frames 2, and movable rods are rotatable on both sides of the mounting seats, and the middle parts of the two movable rods are connected by electric telescopic rods 4, and U-shaped slides are rotatable on the bottom of the two movable rods, and multiple movable wheels are rotatable on both sides of the inner wall of each U-shaped slide, and welding seats are slidably provided on the inner walls of the two U-shaped slides, and slide grooves 2 are opened on both sides of the outer walls of the welding seats, and the outer walls of the movable wheels on both sides are arranged in the slide grooves 2.

[0016] Preferably, the positioning assembly includes two bidirectional screw rods, the outer wall of the two bidirectional screw rods rotates in the middle of the mounting seat, the two ends of the two bidirectional screw rods are installed with motors three, both sides of the outer wall of the two bidirectional screw rods are threadedly connected with L-shaped brackets, both sides of the outer wall of the mounting seat are fixed with guide rods, the middle parts of the L-shaped brackets on both sides slide on the outer walls of the guide rods on both sides respectively, and the top of the middle part of the L-shaped brackets on both sides rotates with two rotating rods.

[0017] Preferably, the point welding mechanism comprises a second linear guide rail, the top of the second linear guide rail is fixed to the bottom of the second mounting frame through a mounting frame, a hydraulic cylinder is installed on the outer wall of the second linear guide rail through a guide block, a mounting plate three is installed on the driving end of the hydraulic cylinder, a welding head is arranged at the bottom of the mounting plate three, and the clamping assembly is arranged at the bottom of the guide block on the outer wall of the second linear guide rail;

[0018] The clamping assembly includes a telescopic frame, the top of which is installed on the bottom of the guide block on the outer wall of the second linear guide rail, and the middle of both sides of the telescopic frame is provided with a mounting groove two, and the middle of the two mounting grooves two is provided with a bidirectional screw rod three that rotates, and the two bidirectional screw rods three are connected by a belt transmission part three, and a motor four is installed on the end of one of the bidirectional screw rods three, and both sides of the outer walls of the two bidirectional screw rods three are threadedly connected with movable claws.

[0019] Preferably, the material dividing component includes an obstruction plate, the bottom of which is installed on the top of the support platform, and L-shaped mounting groove 1 and L-shaped mounting groove 2 are respectively penetrated in the middle of the upper and lower sides of the obstruction plate, and threaded rod 1 and threaded rod 2 are respectively rotated in the middle of the L-shaped mounting groove 1 and L-shaped mounting groove 1, and motors 5 and motor 6 are respectively installed at the ends of threaded rod 1 and threaded rod 2, and push rod 1 and push rod 2 are respectively rotated on the outer walls of threaded rod 1 and threaded rod 2, and the L-shaped mounting groove 1 and L-shaped mounting groove 2 are arranged in opposite directions.

[0020] Working principle: When using the equipment of the present invention to weld the hollow plate box, first stack the hollow plates to be welded in the material box in sequence, and then turn the knob to adjust the height of the U-shaped adjustment plate according to the thickness of each hollow plate, so that the reserved outlet height at the bottom of the material box can only allow one hollow plate to be moved out at a time. After the preparatory work is completed, start the equipment.When the electric telescopic rod is started, the control connecting piece drives the L-shaped push block to move in the through slot, and synchronously drives the limit block to move in the limit slot. At this time, as the L-shaped push block moves, the hollow plate at the bottom of the unloading box is pushed by the L-shaped push block to move out of the reserved opening and enter the conveying assembly on the top of the processing table. The hollow plate is conveyed into the welding area through multiple conveying rollers. At this time, as the conveying rollers rotate, one group of conveying rollers will drive the connected reciprocating screw rods to rotate synchronously, so that the moving seat reciprocates and drives the rectangular frame to move synchronously. Driven by the rectangular frames on both sides, the push plates on both sides move synchronously relative to or oppositely. Then, when the hollow plate moves to the welding position, the push plates on both sides just move relative to each other, squeezing the two sides of the hollow plate in the middle position, so that It is placed upright in the welding position, at this time, motor one stops running, the hollow plate and the correction component stop running, and then motor two starts, and under the connecting action of belt transmission part two, the two-way screw rods one on both sides rotate synchronously, and drive the moving blocks on both sides to move synchronously relative to or oppositely, so that it drives the bottom mounting plate two to move to the positions on both sides of the hollow plate, and motor two stops running. At this time, electric telescopic rod two starts, drives mounting plate two to move downward, and drives the clamping nozzle assembly to move to both sides of the hollow plate, and then electric telescopic rod three starts, each group of movable splints opens, and then motor two is started again, so that the clamping nozzle assemblies on both sides move relatively, so that each group of bottom movable splints enters between the two folded hollow plates, and then motor two stops, and electric telescopic rod three starts The electric telescopic rod four starts, and the movable rods on both sides drive the U-shaped slide to move, so that the welding seat moves down close to the welding position on the hollow plate, and welds it. After the welding is completed, the clamping nozzle assembly is adjusted to contact and fix the hollow plate by starting the motor two, the motor three, the motor three, the electric telescopic rod four and the motor one. The second mounting rack is moved out from between the two layers of hollow panels, the welding seat is adjusted and separated from the hollow panel, and multiple conveying rollers run synchronously to drive the welded hollow panel to move, and it falls on the support table after being detected by the infrared thermal imaging camera. The infrared thermal imaging camera transmits the video results of the welding position of the hollow panel to the central processing system. After image processing and analysis, if the welding position is unqualified, the motor five is started to drive the threaded rod one to rotate, and drive the push rod one to rotate downward and move into the L-shaped long channel. The push rod one enters the long channel and moves in a straight line, and pushes the unqualified hollow panel from the support table to the unqualified collection area. On the contrary, if it is qualified, the motor six is ​​started, and the same operation is performed. The L-shaped mounting slot two is rotated upward and inserted into the long channel for straight movement, and pushes the qualified hollow panel into the qualified collection area.

[0021] In this equipment, not only can the side of the hollow plate box be welded, but also small pieces of hollow plate stabilizing parts can be welded on the surface of the hollow plate. The specific operations are as follows:

[0022] Multiple large hollow panels to be welded are stacked in the material box in turn, and the rest of the preparation work refers to the pre-preparation process for welding on the side of the hollow panel box. Then, small hollow panel stabilizers are stacked in the material box in turn, and then the knob two is rotated to adjust the position of the U-shaped adjustment plate two to adjust the reserved outlet height at the bottom of the material box. The adjustment purpose and method are the same as those of the U-shaped adjustment plate one. Then, the electric roller is started to drive the bottom hollow panel stabilizer to move out, and the hollow whole panel in the material box is synchronously moved to the welding position, and processed by the correction component, the position is corrected, and then the linear guide rail one is started to drive the slider to move toward the top of the electric roller, and the mounting frame two drives the linear guide rail two to move in the synchronous direction, so that the clamping assembly moves to the hollow panel stabilizer above the electric roller. At the top, then the telescopic function of the telescopic frame is started, driving the clamping assembly to move down, and the surrounding mobile claws surround the periphery of the hollow plate fixing part, and then start the motor four, under the transmission of the belt drive part three, the two-way screw rods three on both sides rotate synchronously, driving the moving claws on both sides to move relative to each other, clamping the middle hollow plate fixing part, and then by controlling the linear guide rails two and one, the clamping assembly drives the hollow plate fixing part to move to above the welding position on the hollow plate on the top of the conveying roller, and then the telescopic frame is started to drive the clamping assembly to move down, driving the hollow plate fixing part to fall on the bottom hollow plate welding position, at this time, the hydraulic cylinder starts to drive the welding head to move down to weld the hollow plate fixing part and the hollow plate, and the subsequent operation procedures after the welding are completed refer to the procedures after the welding of the hollow plate box is completed.

[0023] The present invention provides a hollow plate automatic welding device, which has the following beneficial effects:

[0024] 1. The equipment of the present invention can not only weld the sides of the hollow plate box, but also use the point welding mechanism to weld small hollow plate stabilizers on the surface of the hollow plate. Through the cooperation of the point welding mechanism and the clamping assembly, high-precision welding of large hollow plates and small stabilizers can be achieved, which expands the application range of the equipment, is suitable for hollow plate welding operations with various different needs, and enhances the versatility of the equipment.

[0025] 2. The equipment of the present invention is equipped with a central processing system, which can receive image data transmitted by an infrared thermal imaging camera in real time, perform quality analysis on the welding position, automatically judge the quality of welding, and automatically divide qualified welded plates and unqualified welded plates into different areas for unloading by cooperating with the material dividing component, thereby greatly reducing the need for manual quality inspection, realizing intelligent production monitoring, and improving the degree of automation in the production process.

[0026] 3. The present invention can automatically separate the upper and lower layers of folded hollow panels through the design of the layering mechanism, which is suitable for the welding needs of hollow panels in a folded state, so that the upper and lower layers can be accurately separated, avoiding the problem of misaligned welding, and improving the adaptability of the equipment to multi-layer hollow panels.

[0027] 4. The present invention moves the hollow plate to be welded from the loading area to the welding area through the conveying assembly, and further conveys it to the unloading area. The motor drive design of the conveying roller and the synchronous operation of the correction assembly not only realize efficient transmission, but also automatically correct the position of the hollow plate through the push plate, ensuring that the plate is accurately positioned at the welding position, thereby improving the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A perspective view of the present invention;

[0029] Figure 2 It is a three-dimensional top view of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the discharging assembly of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 It is a schematic diagram of the structure of the electric drum of the present invention;

[0033] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0034] Figure 7 It is a structural schematic diagram of the motor 2 of the present invention;

[0035] Figure 8 It is a schematic structural diagram of the side welding assembly of the present invention;

[0036] Fig. 9 It is a structural schematic diagram of the electric telescopic rod 4 of the present invention;

[0037] Fig.10 for Fig. 9 Enlarged view of point C in the middle;

[0038] Fig.11 This is a schematic diagram of the side welding of the hollow plate box body according to the present invention;

[0039] Fig.12 It is a schematic diagram of a hollow plate stabilizing member of the present invention that is welded with a small piece on the surface of the hollow plate;

[0040] Fig.13 for Fig.12 Enlarged view of point D in the middle;

[0041] Fig.14 A schematic diagram of the nozzle assembly of the present invention in use;

[0042] Fig.15 It is a structural schematic diagram of the rotating rod of the present invention.

[0043] Among them, 1. Processing table; 2. Conveyor roller; 3. Belt drive part 1; 4. Motor 1; 5. Feed box; 6. Electric telescopic rod 1; 7. Connector; 8. L-shaped push block; 9. Limit block; 10. Through slot; 11. Limit slot; 12. Mounting slot 1; 13. Roller; 14. Fixed block 1; 15. Adjustment screw 1; 16. U-shaped adjustment plate 1; 17. Knob 1; 18. Feed box; 19. Fixed block 2; 20. Adjustment screw 2; 21. Knob 2; 22. U-shaped adjustment plate 2; 23. Conveyor platform; 24. Electric roller; 25. Reciprocating screw rod; 26. Moving seat; 27. Rectangular frame; 28. Spring 1; 29. ​​Frequency plate; 30. Slide 1; 31. Mounting plate 1; 32. Moving rod; 33. Push plate; 34. Mounting frame 1; 35. Mounting beam; 36. Bidirectional screw rod 1; 37. Belt transmission part 2; 38. Motor 2; 39. Moving block; 40. Electric telescopic rod 2; 41. Mounting plate 2; 4 2. movable splint; 43. spring 2; 44. electric telescopic rod 3; 45. linear guide 1; 46. slider; 47. mounting frame 2; 48. mounting seat; 49. movable rod; 50. electric telescopic rod 4; 51. U-shaped slide seat; 52. movable wheel; 53. welding seat; 54. slide 2; 55. two-way screw rod 2; 56. motor 3; 57. L-shaped bracket; 58. rotating rod; 59. linear guide 2; 60. hydraulic cylinder; 61. mounting plate 3; 6 2. Telescopic frame; 63. Welding head; 64. Mounting slot 2; 65. Motor 4; 66. Bidirectional screw rod 3; 67. Moving clamp; 68. Belt drive part 3; 69. Crossbeam; 70. Infrared thermal imaging camera; 71. Support platform; 72. Obstruction plate; 73. L-shaped mounting slot 1; 74. Motor 5; 75. Threaded rod 1; 76. Push rod 1; 77. L-shaped mounting slot 2; 78. Motor 6; 79. Threaded rod 2; 80. Push rod 2; 81. Guide rod. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Please see attached Figure 1 - Attachment Figure 3, an embodiment of the present invention provides an automatic welding device for hollow plates, including a processing table 1, a conveying component is arranged in the middle of the processing table 1, which is used to convey the hollow plates to be welded to the welding area, and convey them to the support table 71 after welding, and are pushed to the qualified or unqualified collection area by the material separation component, and the correction component is driven to run synchronously by the operation of the conveying component to correct the position of the hollow plates in the moving process, a material discharge box 5 is arranged at the end of the processing table 1 facing the support table 71, a first outlet adjustment component is arranged at the bottom of the outer wall of the material discharge box 5, and a material discharge component is arranged at the bottom, a conveying table 23 is arranged on the outer wall of the material discharge box 5 just above the first outlet adjustment component, a plurality of electric rollers 24 are arranged in the middle of the conveying table 23, a material discharge box 18 is installed on the outer wall of the material discharge box 5 above the conveying table 23, and a second outlet adjustment component is arranged at the bottom of the outer wall of the material discharge box 18;

[0046] Mounting frames 34 are installed on both sides of the top of the processing table 1, and the outer walls of the two mounting frames 34 are connected to mounting beams 35. A crossbeam 69 is connected between the mounting beams 35 on both sides, and an infrared thermal imaging camera 70 is installed at the bottom of the crossbeam 69. A layering mechanism is set between the mounting beams 35 on both sides, which is used to separate the upper and lower layers of the two layers of hollow plates in a folded state after pretreatment, leaving a space for allowing the positioning component to enter the area between the two layers of hollow plates. The positioning component is located at the bottom of the welding seam and cooperates with the top side welding component to weld the top middle seam of the folded hollow plate. The outer wall of the side welding component is provided with a point welding mechanism, which is used to weld the hollow plate stabilizing piece clamped by the bottom clamping component to the large hollow plate on the conveying component.

[0047] Please see attached Figure 1 - Attachment Figure 2 The conveying assembly includes a plurality of conveying rollers 2, which are sequentially arranged in the middle of the processing table 1, and one end of each adjacent two conveying rollers 2 is connected by a belt transmission member 3, and a motor 4 is installed at the other end of any conveying roller 2;

[0048] Specifically, by starting the motor 4, one of the multiple conveyor rollers 2 is driven to rotate, so that under the transmission of the multiple belt transmission parts 3, the multiple conveyor rollers 2 rotate synchronously, thereby driving the top hollow plate to be welded to move to the welding area.

[0049] Please see attached Figure 5The correction component includes two groups of reciprocating screw rods 25, one end of the two groups of reciprocating screw rods 25 are respectively installed at the two ends of the two conveying rollers 2, and the other ends of the two groups of reciprocating screw rods 25 are rotated with a same frequency plate 29, the outer wall of the reciprocating screw rods 25 on the same side is threadedly connected with a moving seat 26, and a rectangular frame 27 is installed on the top of the moving seat 26 on the same side, and a slide groove 30 is penetrated on both sides of the rectangular frame 27, and a mounting plate 31 slides in the middle of the slide groove 30, one side of the mounting plate 31 is connected to a plurality of springs 28, and the other ends of the plurality of springs 28 are installed on the inner wall of the rectangular frame 27, the other side of the mounting plate 31 is connected to a plurality of moving rods 32, and the other ends of the plurality of moving rods 32 are connected to a push plate 33, and the outer walls of the plurality of moving rods 32 slide in the middle of the rectangular frame 27.

[0050] Specifically, driven by the rotation of 2, two of them drive the two groups 25 on both sides to rotate synchronously, so that the moving seat 26 moves back and forth, and drives the rectangular frame 27 to move synchronously. Driven by the rectangular frames 27 on both sides, the push plates 33 on both sides move synchronously relative to each other or move oppositely. Then, when the hollow plate moves to the welding position, the push plates 33 on both sides move relatively to squeeze the two sides of the hollow plate in the middle position, so that it is placed upright in the welding position. When the push plates 33 on both sides contact the outer wall of the hollow plate, due to the continuous operation of the conveying roller 2, the push plates 33 will continue to move relatively under its transmission until the reciprocating screw The groove end returns again. In order to make the correction component usable for different types of plates, the present invention designs an adaptive component between the push plate 33 and the rectangular frame 27. Through the cooperation of the spring 28, the slide groove 30, the mounting plate 31 and the moving rod 32, when the push plate 33 continues to push toward the outer wall of the hollow plate, the moving rod 32 is pushed, driving the mounting plate 31 to slide in the middle of the slide groove 30, thereby squeezing the spring 28, causing it to compress and produce a rebound reaction force, which reacts on the push plate 33, ensuring that the push plates 33 on both sides squeeze and correct the two sides of the plate body, and also leaving a movable space for the push plates 33. Through the correction component, the plates to be welded that are moved to the welding area can be placed upright at the bottom of the welding component, thereby improving the welding accuracy.

[0051] Please see attached Figure 3 and attached Figure 5 The first outlet adjustment component includes two fixed blocks 14, and the two fixed blocks 14 are respectively installed on both sides of the discharge box 5. An adjusting screw 15 is rotated in the middle of the two fixed blocks 14, and a knob 17 is installed on the top of each adjusting screw 15. The outer walls of the two adjusting screws 15 are threadedly connected with a U-shaped adjustment plate 16, and the outer wall of the U-shaped adjustment plate 16 is set on the outer wall of the discharge box 5.

[0052] Please see attached Figure 5 - Attachment Figure 6The second outlet adjustment component includes two fixed blocks 19, and the two fixed blocks 19 are respectively installed on both sides of the material box 18. An adjusting screw 20 is rotated in the middle of the two fixed blocks 19, and a knob 21 is installed on the top of each adjusting screw 20. The outer walls of the two adjusting screws 20 are threadedly connected with a U-shaped adjustment plate 22, and the outer wall of the U-shaped adjustment plate 22 is set on the outer wall of the material box 18.

[0053] Specifically, when in use, the discharge port heights at the bottom of the discharge box 5 and the discharge box 18 need to be adjusted according to the thickness of the plate, so that only one plate to be welded is allowed to pass through at a time. The control methods of the first outlet adjustment component and the second outlet adjustment component are the same. The specific control method takes the first outlet adjustment component as an example:

[0054] By rotating the knob 17, the adjusting screw 15 is driven to rotate synchronously, thereby driving the U-shaped adjusting plate 16 to move up and down along the outer wall of the discharge box 5, so as to achieve the purpose of adjusting the height of the discharge port.

[0055] Please see attached Figure 3 - Attachment Figure 4 The discharging assembly includes two electric telescopic rods 6, one end of the two electric telescopic rods 6 rotates on the outer wall of the processing table 1, and the other ends of the two electric telescopic rods 6 are rotated with connecting parts 7 through movable parts. L-shaped push blocks 8 are installed on the top of the two connecting parts 7. Limiting blocks 9 are fixed on both sides of the outer wall of each L-shaped push block 8. Through grooves 10 are opened on both sides of the bottom of the unloading box 5. Limiting grooves 11 are opened on both sides of the inner walls of the two through grooves 10. The outer wall of each limit block 9 slides on the inner wall of the limit groove 11 on the corresponding side. The middle part of both sides of the top of the unloading box 5 is penetrated by mounting grooves 12, and multiple rollers 13 are rotated inside the two mounting grooves 12.

[0056] Specifically, when pushing out the plate material to be welded in the material box 5, it is necessary to start the electric telescopic rod 6 to drive the connecting piece 7 to move, thereby driving the L-shaped push block 8 to move in the through groove 10. As the L-shaped push block 8 moves, it drives the limit blocks 9 on both sides to slide in the limit groove 11. Under the movement of the L-shaped push block 8, the protruding part on its top will push the plate material to be welded at the bottom of the material box 5 to move, move out from the discharge port, and enter the conveying assembly. When the plate material to be welded moves, the multiple rollers 13 at its bottom will roll under its operation, thereby reducing the friction of the plate movement.

[0057] Please see attached Figure 7 - Attachment Figure 8 and attached Fig.11The layering mechanism includes two bidirectional screw rods 36, which are both threadedly connected to the middle of the mounting beams 35 on both sides. The two bidirectional screw rods 36 are connected by a belt transmission member 37, and a motor 38 is installed at the end of one of the bidirectional screw rods 36. Both sides of the two bidirectional screw rods 36 are threadedly connected to moving blocks 39, and an electric telescopic rod 40 is installed at the bottom of each moving block 39. A mounting plate 41 is installed at the driving end of the electric telescopic rod 40 on the same side, and a plurality of clamping nozzle assemblies are installed on the outer wall of the mounting plate 41, which are used to clamp the top hollow plate to separate it from the bottom hollow plate;

[0058] Please see attached Figure 8 and attached Fig.14 Each clamping nozzle assembly includes two movable clamps 42, the ends of the two movable clamps 42 are rotated on the outer wall of the mounting plate 41, the opposite sides of the two movable clamps 42 are connected by springs 43, and an electric telescopic rod 44 is rotated in the middle of the movable clamp 42 on one side, and the driving end of the electric telescopic rod 44 is rotated in the middle of the movable clamp 42 on the other side through a rotating member.

[0059] Specifically, after the plate material to be welded reaches the welding area and has been corrected, the motor 4 stops running, the motor 2 38 starts, and under the connection of the belt conveyor 2 37, the two-way screw rods 1 36 on both sides rotate synchronously, and drive the moving blocks 39 on both sides to move synchronously relative to each other or move in the opposite direction, so that it drives the bottom mounting plate 2 41 to move to the positions on both sides of the hollow plate, and the motor 2 38 stops running. At this time, the electric telescopic rod 2 40 starts, drives the mounting plate 2 41 to move downward, drives the nozzle assembly to move to both sides of the hollow plate, and then the electric The telescopic rod three 44 is started, each group of movable splints 42 is opened, and then the motor two 38 is started again, so that the clamping nozzle assemblies on both sides move relative to each other, so that each group of bottom movable splints 42 enters between the two folded layers of hollow plates, and then the motor two 38 stops, the electric telescopic rod three 44 is started, each group of movable splints 42 clamps the top hollow plate, the electric telescopic rod three 44 stops, and the electric telescopic rod two 40 is started, driving the mounting plate two 41 to move upward, that is, the clamping nozzle assembly moves upward, and there is space between the two folded layers of hollow plates, which is convenient for the positioning assembly to enter.

[0060] When the above-mentioned clamping nozzle assembly is in operation, it mainly relies on the middle electric telescopic rod three 44 to drive the movable clamps 42 on both sides to open. When the movable clamps 42 on both sides are opened, the spring two 43 will be stretched to generate a rebound reaction force, and strengthen the fastening between the two movable clamps 42, as well as the subsequent resetting of the two movable clamps 42.

[0061] Please see attached Fig. 9 - Attachment Fig.11The side welding assembly includes two linear guide rails 45, which are respectively mounted on the outer walls of the mounting frames 34 on both sides. Slide blocks 46 are arranged on the outer walls of the two linear guide rails 45. Mounting frames 47 are mounted on the bottom of the two slide blocks 46. Mounting seats 48 are mounted on the bottom of the mounting frames 47. Active rods 49 are rotatable on both sides of the mounting seats 48. The middle parts of the two active rods 49 are connected by an electric telescopic rod 40. U-shaped slide seats 51 are rotatable on the bottom of the two active rods 49. Multiple active wheels 52 are rotatable on both sides of the inner wall of each U-shaped slide seat 51. Welding seats 53 are slidably arranged on the inner walls of the two U-shaped slide seats 51. Slide grooves 54 are arranged on both sides of the outer wall of the welding seats 53. The outer walls of the active wheels 52 on both sides are arranged in the slide grooves 54.

[0062] Specifically, after the positioning assembly enters between the two folded layers of hollow plates and reaches the bottom of the welding seam, it can start the side welding assembly to perform a one-time edge sealing welding on its welding position. The electric telescopic rod 4 50 is started, and the movable rods 49 on both sides drive the U-shaped slide 51 to move, so that the welding seat 53 moves down close to the welding position on the hollow plate and welds it. When the U-shaped slide 51 moves, it will drive the inner wall movable wheel 52 to roll on the inner wall of the slide groove 2 54, thereby reducing friction and ensuring that the welding seat 53 and the U-shaped slide 51 will not separate. When the welding seat 53 welds the bottom welding seam, in order to ensure the accuracy of the welding position, the position of the welding seat 53 can also be controlled by the linear guide 1 45.

[0063] Please see attached Fig.11 and attached Fig.14 - Attachment Fig.15 The positioning assembly includes a bidirectional screw rod 55, the outer wall of the bidirectional screw rod 55 rotates in the middle of the mounting seat 48, a motor 3 56 is installed at the end of the bidirectional screw rod 55, both sides of the outer wall of the bidirectional screw rod 55 are threadedly connected with L-shaped brackets 57, both sides of the outer wall of the mounting seat 48 are fixed with guide rods 81, the middle parts of the L-shaped brackets 57 on both sides slide on the outer walls of the guide rods 81 on both sides, and two rotating rods 58 are rotated at the top of the middle part of the L-shaped brackets 57 on both sides.

[0064] Specifically, the motor 3 56 is started, the bidirectional screw rod 2 55 rotates, and the L-shaped brackets 57 on both sides move relatively along the guide rod 81, so that the mounting frames 2 47 on both sides enter between the upper and lower hollow layers, and the welding position is located at the upper position between the two rotating rods 58. The rolling design of the two rotating rods 58 can reserve space for the hollow plate during welding, so that the conical welding seat 53 can be welded to tightly connect the weld.

[0065] Please see attached Fig.12 - Attachment Fig.13The point welding mechanism includes a linear guide rail 59, the top of which is fixed to the bottom of the mounting frame 47 through a mounting frame, a hydraulic cylinder 60 is installed on the outer wall of the linear guide rail 59 through a guide block, a mounting plate 61 is installed on the driving end of the hydraulic cylinder 60, a welding head 63 is arranged at the bottom of the mounting plate 61, and a clamping assembly is arranged at the bottom of the guide block on the outer wall of the linear guide rail 59;

[0066] The clamping assembly includes a telescopic frame 62, the top of which is installed on the bottom of the guide block on the outer wall of the linear guide rail 2 59, and mounting grooves 2 64 are provided in the middle of both sides of the telescopic frame 62. A bidirectional screw rod 3 66 is rotated in the middle of the two mounting grooves 2 64, and the two bidirectional screw rods 3 66 are connected by a belt transmission part 3 68. A motor 4 65 is installed at the end of one of the bidirectional screw rods 3 66, and movable clamps 67 are threadedly connected on both sides of the outer walls of the two bidirectional screw rods 3 66.

[0067] Specifically, in this device, not only can the side of the hollow plate box be welded, but also a small piece of hollow plate stabilizing member can be welded on the surface of the hollow plate. Specifically, through the cooperation of the potential welding mechanism and the clamping assembly, the small piece of hollow plate stabilizing member is removed from the electric roller 24 and then moved to the hollow plate for welding. The specific operation is as follows:

[0068] Multiple large hollow panels to be welded are stacked in the material box 5 in turn, and the rest of the preparation work refers to the pre-preparation process for welding the side of the hollow panel box. Then, the small hollow panel stabilizers are stacked in the material box 18 in turn, and then the knob 21 is rotated to adjust the position of the U-shaped adjustment plate 22 to adjust the reserved outlet height at the bottom of the material box 18, which is the same as the adjustment purpose and method of the U-shaped adjustment plate 16. Then, the electric roller 24 is started to drive the bottom hollow panel stabilizers to move out, and the hollow whole panel in the material box 5 is synchronously moved to the welding position, and is processed by the correction component and the position is corrected. Then, the linear guide 45 is started to drive the slider 46 to move toward the top of the electric roller 24, and the mounting frame 47 drives the linear guide 2 59 to move in the synchronous direction, so that the clamping component moves To the top of the hollow plate stabilizer above the electric roller 24, then the telescopic function of the telescopic frame 62 is started, driving the clamping assembly to move downward, and the surrounding mobile clamps 67 surround the periphery of the hollow plate stabilizer, and then start the motor four 65, under the transmission of the belt transmission part three 68, the two-way screw rods three 66 on both sides rotate synchronously, driving the two sides of the mobile clamps 67 to move relative to each other, clamping the middle hollow plate stabilizer, and then by controlling the linear guide rails two 59 and the linear guide rail one 45, the clamping assembly drives the hollow plate stabilizer to move to above the welding position on the hollow plate at the top of the conveying roller 2, and then the telescopic frame 62 is started to drive the clamping assembly to move downward, driving the hollow plate stabilizer to fall on the bottom hollow plate welding position, at this time, the hydraulic cylinder 60 starts to drive the welding head 63 to move downward to weld the hollow plate stabilizer and the hollow plate.

[0069] Please see attached Figure 1 - Attachment Figure 2 The material dividing assembly includes an obstruction plate 72, the bottom of which is mounted on the top of the support platform 71, and an L-shaped mounting groove 1 73 and an L-shaped mounting groove 2 77 are respectively penetrated in the middle of the upper and lower sides of the obstruction plate 72, and a threaded rod 1 75 and a threaded rod 2 79 are respectively rotatable in the middle of the L-shaped mounting groove 1 73 and the L-shaped mounting groove 1 73, and a motor 5 74 and a motor 6 78 are respectively mounted on the ends of the threaded rod 1 75 and the threaded rod 2 79, and a push rod 1 76 and a push rod 2 80 are respectively rotatable on the outer walls of the threaded rod 1 75 and the threaded rod 2 79, and the L-shaped mounting groove 1 73 and the L-shaped mounting groove 2 77 are arranged in opposite directions.

[0070] Specifically, after the welding is completed, the welded hollow plate body will be moved by the infrared thermal imaging camera 70 for detection and fall onto the support table 71 under the transmission of multiple transmission rollers 2. The infrared thermal imaging camera 70 will transmit the camera results of the hollow plate welding position to the central processing system. After image processing and analysis, if the welding position is unqualified, the motor 5 74 will be started to drive the threaded rod 1 75 to rotate, and drive the push rod 1 76 to rotate downward and move into the L-shaped long channel. The push rod 1 76 enters the long channel and moves in a straight line, and pushes the unqualified hollow plate from the support table 71 to the unqualified collection area. On the contrary, if it is qualified, the motor 6 78 will be started, and the same operation will be performed. The L-shaped mounting slot 2 77 will rotate upward and move into the long channel and push the qualified hollow plate into the qualified collection area.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow plate automatic welding device, comprising a processing table (1), characterized in that: A conveying assembly is provided in the middle of the processing table (1), which is used to convey the hollow plate to be welded to the welding area, and convey it to the support table (71) after welding is completed, and is pushed to the qualified or unqualified collection area by the material separation assembly. The operation of the conveying assembly drives the correction assembly to operate synchronously, so as to correct the position of the hollow plate during the movement. A material discharge box (5) is provided on the end of the processing table (1) opposite to the support table (71), a first outlet adjustment assembly is provided at the bottom of the outer wall of the material discharge box (5), and a material discharge assembly is provided at the bottom thereof. A conveying table (23) is provided on the outer wall of the material discharge box (5) just above the first outlet adjustment assembly, and a plurality of electric rollers (24) are provided in the middle of the conveying table (23). A material discharge box (18) is installed on the outer wall of the material discharge box (5) above the conveying table (23), and a second outlet adjustment assembly is provided at the bottom of the outer wall of the material discharge box (18); Mounting frames (34) are installed on both sides of the top of the processing table (1), and the outer walls of the two mounting frames (34) are connected to mounting beams (35). A crossbeam (69) is connected between the mounting beams (35) on both sides, and an infrared thermal imaging camera (70) is installed at the bottom of the crossbeam (69). A layering mechanism is provided between the mounting beams (35) on both sides, which is used to separate the upper and lower layers of the two layers of hollow plates in a folded state after pretreatment, leaving an area for allowing a positioning component to enter the area between the two layers of hollow plates. The positioning component is located at the bottom of the welding seam and cooperates with the top side welding component to weld the top middle seam of the folded hollow plate. The outer wall of the side welding component is provided with a point welding mechanism, which is used to weld the hollow plate fixing piece clamped by the bottom clamping component and the large hollow plate on the conveying component.

2. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The conveying assembly comprises a plurality of conveying rollers (2), wherein the plurality of conveying rollers (2) are sequentially arranged in the middle of the processing table (1), one end of each adjacent two conveying rollers (2) are connected via a belt transmission member (3), and a motor (4) is installed at the other end of any one of the conveying rollers (2); The correction component comprises two groups of reciprocating screw rods (25), one end of the two groups of reciprocating screw rods (25) are respectively installed at the two ends of two conveying rollers (2), the other end of the two groups of reciprocating screw rods (25) are rotated with a frequency plate (29), the outer wall of the reciprocating screw rods (25) on the same side is threadedly connected with a moving seat (26), and a rectangular frame (27) is installed on the top of the moving seat (26) on the same side, and a slide groove (30) is penetrated on both sides of the rectangular frame (27), and a mounting plate (31) is slidably arranged in the middle of the slide groove (30), one side of the mounting plate (31) is connected with a plurality of springs (28), and the other ends of the plurality of springs (28) are installed on the inner wall of the rectangular frame (27), and the other side of the mounting plate (31) is connected with a plurality of moving rods (32), and the other ends of the plurality of moving rods (32) are connected with a push plate (33), and the outer walls of the plurality of moving rods (32) slide in the middle of the rectangular frame (27).

3. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The first outlet adjustment component comprises two fixed blocks (14), the two fixed blocks (14) are respectively installed on both sides of the material discharge box (5), an adjusting screw (15) is rotatable in the middle of the two fixed blocks (14), a knob (17) is installed on the top of each adjusting screw (15), the outer walls of the two adjusting screws (15) are threadedly connected with a U-shaped adjustment plate (16), and the outer wall of the U-shaped adjustment plate (16) is arranged on the outer wall of the material discharge box (5).

4. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The discharging assembly comprises two electric telescopic rods (6), one end of each of the electric telescopic rods (6) is rotated on the outer wall of the processing table (1), and the other end of each of the electric telescopic rods (6) is rotated with a connecting member (7) through a movable member, and an L-shaped push block (8) is installed on the top of each of the connecting members (7), and a limiting block (9) is fixed on both sides of the outer wall of each of the L-shaped push blocks (8), and through grooves (10) are provided on both sides of the bottom of the discharge box (5), and limiting grooves (11) are provided on both sides of the inner wall of the two through grooves (10), and the outer wall of each of the limiting blocks (9) slides on the inner wall of the limiting groove (11) on the corresponding side, and the middle part of the top of the two sides of the discharge box (5) is penetrated by an installation groove (12), and a plurality of rollers (13) are rotated inside the two installation grooves (12).

5. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The second outlet adjustment component comprises two fixed blocks (19), the two fixed blocks (19) are respectively installed on both sides of the material discharge box (18), the middle part of the two fixed blocks (19) is provided with an adjusting screw (20) which is rotated, the top of each adjusting screw (20) is provided with a knob (21), the outer walls of the two adjusting screws (20) are threadedly connected with a U-shaped adjustment plate (22), and the outer wall of the U-shaped adjustment plate (22) is arranged on the outer wall of the material discharge box (18).

6. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The stratification mechanism comprises two bidirectional screw rods (36), the two bidirectional screw rods (36) are both threadedly connected to the middle of the mounting beams (35) on both sides, the two bidirectional screw rods (36) are connected by a belt transmission member (37), a motor (38) is installed at the end of one of the bidirectional screw rods (36), and moving blocks (39) are threadedly connected on both sides of the two bidirectional screw rods (36), and an electric telescopic rod (40) is installed at the bottom of each moving block (39), and a mounting plate (41) is installed at the driving end of the electric telescopic rod (40) on the same side, and a plurality of clamping nozzle assemblies are installed on the outer wall of the mounting plate (41), which are used to clamp the top hollow plate to separate it from the bottom hollow plate; Each of the clamping nozzle assemblies comprises two movable clamping plates (42), the ends of the two movable clamping plates (42) are rotated on the outer wall of the second mounting plate (41), the opposite sides of the two movable clamping plates (42) are connected by a second spring (43), and an electric telescopic rod three (44) is rotated in the middle of the movable clamping plate (42) on one side, and the driving end of the electric telescopic rod three (44) is rotated in the middle of the movable clamping plate (42) on the other side through a rotating member.

7. The hollow plate automatic welding equipment according to claim 1 is characterized in that: The side welding assembly comprises two linear guide rails (45), the two linear guide rails (45) are respectively mounted on the outer walls of the mounting frames (34) on both sides, the outer walls of the two linear guide rails (45) are both provided with sliders (46), the bottoms of the two sliders (46) are provided with mounting frames (47), the bottoms of the mounting frames (47) are provided with mounting seats (48), the front and rear sides of the mounting seats (48) are both provided with movable rods (49) for rotation, the middle parts of the two movable rods (49) are connected by electric telescopic rods (50), the bottoms of the two movable rods (49) are both provided with U-shaped sliding seats (51) for rotation, the inner walls of each U-shaped sliding seat (51) are provided with a plurality of movable wheels (52) for rotation, the inner walls of the two U-shaped sliding seats (51) are provided with welding seats (53) for sliding, the outer walls of the welding seats (53) are both provided with sliding grooves (54) on both sides, and the outer walls of the movable wheels (52) on both sides are arranged in the sliding grooves (54).

8. The hollow plate automatic welding equipment according to claim 7 is characterized in that: The positioning assembly comprises a bidirectional screw rod 2 (55), the outer wall of the bidirectional screw rod 2 (55) is rotated in the middle of the mounting seat (48), a motor 3 (56) is installed at the end of the bidirectional screw rod 2 (55), both sides of the outer wall of the bidirectional screw rod 2 (55) are threadedly connected with L-shaped brackets (57), both sides of the outer wall of the mounting seat (48) are fixed with guide rods (81), the middle parts of the L-shaped brackets (57) on both sides slide on the outer walls of the guide rods (81) on both sides respectively, and the top of the middle parts of the L-shaped brackets (57) on both sides are rotated with two rotating rods (58).

9. The automatic welding equipment for hollow plates according to claim 7, characterized in that: The point welding mechanism comprises a second linear guide rail (59), the top of the second linear guide rail (59) is fixed to the bottom of the second mounting frame (47) through a mounting frame, the outer wall of the second linear guide rail (59) is equipped with a hydraulic cylinder (60) through a guide block, the driving end of the hydraulic cylinder (60) is equipped with a third mounting plate (61), the bottom of the third mounting plate (61) is provided with a welding head (63), and the clamping assembly is arranged at the bottom of the guide block of the outer wall of the second linear guide rail (59); The clamping assembly includes a telescopic frame (62), the top of which is mounted on the bottom of the guide block on the outer wall of the linear guide rail (59), and the middle of both sides of the telescopic frame (62) is provided with a mounting groove (64), and the middle of the two mounting grooves (64) are both rotated with a bidirectional screw rod (66), and the two bidirectional screw rods (66) are connected by a belt transmission part (68), and a motor (65) is installed at the end of one of the bidirectional screw rods (66), and both sides of the outer wall of the two bidirectional screw rods (66) are threadedly connected with movable clamps (67).

10. The automatic welding equipment for hollow plates according to claim 1, characterized in that: The material distribution component includes an obstruction plate (72), the bottom of which is mounted on the top of a support platform (71), and an L-shaped mounting groove 1 (73) and an L-shaped mounting groove 2 (77) are respectively provided in the middle of the upper and lower sides of the obstruction plate (72), and a threaded rod 1 (75) and a threaded rod 2 (79) are respectively rotatable in the middle of the L-shaped mounting groove 1 (73) and the L-shaped mounting groove 1 (73), and a motor 5 (74) and a motor 6 (78) are respectively mounted on the ends of the threaded rod 1 (75) and the threaded rod 2 (79), and a push rod 1 (76) and a push rod 2 (80) are respectively rotatable on the outer walls of the threaded rod 1 (75) and the threaded rod 2 (79), and the L-shaped mounting groove 1 (73) and the L-shaped mounting groove 2 (77) are arranged in opposite directions.

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