Civil air defense engineering building air pipe welding device

Abstract

The present application relates to the technical field of air pipe welding, and specifically discloses a civil air defense engineering building air pipe welding device, which comprises a welding machine body and further comprises: a clamping assembly arranged on the upper side of the welding machine body and used for clamping the air pipe; the clamping assembly can clamp and fix the air pipe, thereby ensuring the stability of the air pipe during welding with the flange; the detection assembly can automatically preliminarily adjust the welding power of the welding machine body according to the wall thickness of the air pipe; the adjusting assembly can automatically adjust the range of the corner and the middle part of the air pipe under the current air pipe size according to the long side size of the air pipe when the clamping assembly clamps the air pipe; the touch control assembly can adjust the corresponding triggering time under the current range of the corner and the middle part according to the adjustment of the corner and the middle part of the air pipe by the adjusting assembly; and the regulating assembly can automatically adjust the welding power of the corner and the middle part of the air pipe under the current air pipe size.

Description

Technical Field

[0001] This invention relates to the field of duct welding technology, specifically to a welding device for ductwork in civil defense engineering buildings. Background Technology

[0002] Air ducts in civil defense engineering buildings are ventilation system pipes specifically used in civil air defense projects. They are mainly used to achieve functions such as clean ventilation, filtration ventilation, and isolation ventilation during wartime or emergency situations. These air ducts are usually made of corrosion-resistant materials such as galvanized steel plates or stainless steel, and have good airtightness, pressure resistance, and fire resistance. In the installation and processing of rectangular air ducts, the air ducts and flanges need to be welded and fixed by a laser welding machine, and then the two air ducts are connected and installed through the flanges at the ends of the air ducts.

[0003] When welding rectangular ducts and flanges using a laser welding machine, the welding torch is controlled to move along the connection point between the duct and flange to fix them in place. However, during the welding process, the welding power of the laser welding machine cannot be automatically adjusted according to the wall thickness and long side dimension of the duct for welding the corners and middle of the rectangular duct. When the long side dimension of the rectangular duct is large, the heat loss in the corner area will be greater, and the stress concentration in the corner area may lead to insufficient penetration and affect the weld strength. On the other hand, the heat accumulation in the middle area of ​​the duct will be greater, which may cause bending deformation during welding and may also cause brittle weld cracking, thus affecting the welding effect. Therefore, we propose a welding device for ducts in civil defense engineering buildings. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for air ducts in civil defense engineering buildings, in order to solve the problems mentioned in the background art, where the welding power of the laser welding machine cannot be automatically adjusted according to the wall thickness and long side dimension of the air duct for welding the corners and middle of the rectangular air duct. When the long side dimension of the rectangular air duct is large, the heat loss in the corner area of ​​the air duct will be large, and the stress concentration in the corner area may lead to insufficient penetration and affect the welding firmness. On the other hand, the heat accumulation in the middle area of ​​the air duct will be large, which may cause bending deformation of the air duct during welding and may cause brittle weld cracking, thus affecting the welding effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for ventilation ducts in civil defense engineering buildings, comprising: a welding machine body, a guide rail frame provided on the welding machine body, and a welding torch provided on one side of the guide rail frame;

[0006] It also includes: a clamping assembly, which is located on the upper side of the welding machine body and is used to clamp the air duct;

[0007] The detection component is located on one side of the clamping component. The detection component automatically adjusts the welding power of the welding machine body according to the wall thickness of the air duct being detected.

[0008] An adjustment component is located on one side of the clamping component. The adjustment component automatically adjusts the area of ​​the corner and middle of the duct according to the long side dimension of the duct.

[0009] The touch control component is located on the upper side of the welding machine body. The touch control component adjusts the power and trigger timing according to the adjustment of the corner and middle areas of the air duct by the adjustment component.

[0010] The control component is located on the upper side of the welding machine body. Based on the adjustment range of the corner and middle areas of the duct by the adjustment component, and triggered by the touch component, the control component automatically adjusts the welding power of the corner and middle areas of the duct.

[0011] The clamping assembly includes a support fixed to the upper side of the welding machine body. Two first supports and two second supports are symmetrically arranged on the upper side of the welding machine body. A double-acting screw is threaded between the two first supports and the two second supports. One end of each double-acting screw is fixed to the output end of a first motor, which is fixed to the upper side of the welding machine body. Two support blocks are rotatably arranged on both sides of each double-acting screw, and the support blocks are fixed to the upper side of the welding machine body. A guide rod is slidably arranged between the two first supports and the two second supports, and the guide rod is fixed to the upper side of the welding machine body.

[0012] The first and second supports are respectively equipped with clamps on their adjacent sides, and multiple ball bearings are movably arranged at equal intervals on one side of the clamps. Pressure sensors are respectively installed on the inner side of the first and second supports.

[0013] The detection component includes a mounting component that is slidably disposed with the support member. One end of the mounting component is fixed to the second bracket on the rear side. An electric push rod is fixed to the upper side of the mounting component. A movable component that is slidably disposed with the support member is fixed to the telescopic end of the electric push rod. A clamping block is provided on one side of the movable component.

[0014] The mounting component has a first variable resistor on its upper side. The first variable resistor includes a support fixed to the mounting component. A metal strip and a sliding rod are fixed to the inner side of the support. A sliding piece that slides on the sliding rod and is slidably disposed with the metal strip is provided. A connecting rod that is fixed to the moving component is fixed to one side of the sliding piece. A protective shell that is fixed to the mounting component is provided on the outer side of the first variable resistor. The connecting rod moves through the side end of the protective shell.

[0015] The adjustment assembly includes four first telescopic members and four second telescopic members. Each pair of first telescopic members and each pair of second telescopic members are symmetrically slidably arranged on the upper side of two first supports. Each of the two second supports has two third telescopic members symmetrically slidably arranged on the upper side. The sliding end of each of the first telescopic members is fixed with a connecting rod that is slidably arranged with the second support.

[0016] Among them, a sliding member is fixed on one side of each of the two first telescopic members on the rear side and the two connecting rod members on the right side. The sliding member on one side of the first telescopic member is slidably mounted on the upper side of the first bracket, and the sliding member on one side of the connecting rod member is slidably mounted on the upper side of the second bracket. A second motor is fixed on the upper side of each of the four sliding members. A first lead screw that rotates with the sliding member is fixed on the output end of the second motor. A first tooth is threaded on the first lead screw that slides with the sliding member. A first gear is meshed on one side of the first tooth. A second gear is fixed on the upper side of the first gear. The first gear and the second gear are rotatably mounted on the upper side of the sliding member. A second tooth is meshed on one side of the second gear. Two second teeth on the upper side of the two first brackets are fixed to the two second telescopic members on the rear side, and two second teeth on the upper side of the two second brackets are fixed to the two third telescopic members on the right side.

[0017] Each pair of second telescopic members and each pair of third telescopic members are respectively provided with toothed conditions on one side. A third gear is meshed between each pair of toothed conditions. A connecting member that is slidably disposed with the toothed conditions is rotatably disposed in the middle of the third gear. The lower end of the connecting member on the upper side of the first bracket is fixed to the first bracket. The lower end of the connecting member on the upper side of the second bracket is fixed to the second bracket. A fixing member is fixed on one side of the first bracket. A first switch is installed on one side of the fixing member. A second switch is installed on one side of the sliding member. A second variable resistor is provided on the upper side of the left sliding member. The structure of the second variable resistor is the same as that of the first variable resistor. The slider of the second variable resistor is fixed to the second toothed member.

[0018] The touch control component includes two guide members fixedly mounted on one side of two first brackets. Mounting blocks are fixedly mounted on the upper side of the telescopic ends of the first, second, and third telescopic members. A third switch is mounted on one side of the mounting block. A second carriage is slidably mounted between the telescopic ends of every two third telescopic members. A first carriage is slidably mounted between the telescopic ends of every two first and second telescopic members. Two second carriages are slidably mounted along the inner side of the two first carriages. The two first carriages are slidably mounted with the two guide members. A third motor is fixedly mounted on the upper side of one guide member. A second lead screw is fixedly mounted on the output end of the third motor. The second lead screw is threaded to one side of the first carriage. Pressure blocks are fixedly mounted on the four sides of the guide rail frame located on the welding torch.

[0019] The control component includes a housing fixed to the welding machine body. A third variable resistor is provided inside the housing. The structure of the third variable resistor is the same as that of the first variable resistor. An adsorption block is fixed on the upper side of the slider of the third variable resistor. The adsorption block is slidably disposed with the top inner side of the housing. Two electromagnetic blocks are fixed inside the housing. A spring is fixed on one side of the adsorption block and is fixed to the inner wall of the housing.

[0020] The present invention has at least the following beneficial effects:

[0021] This invention, when welding rectangular ducts and flanges using a laser welding machine body, allows for positional adjustments of the welding torch in the forward, backward, left, right, and height directions via a guide rail frame. A clamping assembly securely holds the duct, ensuring stability during welding. A detection component measures the duct wall thickness and automatically adjusts the welding power of the machine body based on this thickness. An adjustment component automatically adjusts the duct's power according to its long side dimension while the clamping assembly holds it. The corner and center areas of the duct are controlled by a touch component. The trigger timing for the corresponding corner and center areas can be adjusted by adjusting the control component. When the touch component is triggered, the welding power of the corner and center areas of the duct is automatically adjusted according to the control component. This prevents insufficient penetration at the corners, bending deformation in the center, or brittle welds that may occur during welding, thus improving the welding effect between the duct and the flange. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a front-view three-dimensional structural diagram of the clamping component, detection component, adjustment component and touch component of the present invention;

[0024] Figure 3 This is a rear-view three-dimensional structural diagram of the clamping component, detection component, adjustment component and touch component of the present invention;

[0025] Figure 4 This is a cross-sectional view of the second bracket of the present invention and a structural schematic diagram showing its exploded connection with the clamping component;

[0026] Figure 5 This is a cross-sectional view of the protective shell of the present invention, a partial cross-sectional view of the moving part, and a structural schematic diagram showing the explosion of the clamping block;

[0027] Figure 6 This is a schematic diagram of the support connection structure of the present invention;

[0028] Figure 7This is a schematic diagram of the connection between the first bracket and the second bracket of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection between the first bracket and the second bracket of the present invention from another perspective;

[0030] Figure 9 For the present invention Figure 7 Enlarged structural diagram at point A;

[0031] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point B;

[0032] Figure 11 For the present invention Figure 8 Enlarged structural diagram at point C;

[0033] Figure 12 For the present invention Figure 8 Enlarged structural diagram at point D;

[0034] Figure 13 This is a schematic diagram of the structure of the touch component of the present invention;

[0035] Figure 14 This is a schematic diagram of the connection between the first carriage and the second carriage of the present invention;

[0036] Figure 15 This is a cross-sectional structural diagram of the housing of the present invention.

[0037] In the diagram: 11. Welding machine body; 12. Guide rail frame; 13. Welding torch; 2. Clamping assembly; 21. Support component; 22. First bracket; 23. Second bracket; 24. Guide rod component; 25. Bidirectional lead screw; 26. First motor; 27. Support block; 28. Clamping component; 29. ​​Ball bearing; 210. Pressure sensor; 3. Detection assembly; 31. Mounting component; 32. Electric push rod; 33. Moving component; 34. Clamping block; 35. First variable resistance component; 351. Support; 352. Metal strip; 353. Slide rod; 354. Slide plate; 36. Connecting rod; 37. Protective shell; 4. Adjustment assembly; 41. First telescopic component; 42. Second telescopic component; 43. Third telescopic component; 44. 45. Linkage; 46. Sliding component; 47. Second motor; 48. First lead screw; 49. First gear; 410. Second gear; 411. Second gear; 412. Second variable resistance component; 413. Gear condition; 414. Third gear; 415. Connecting component; 416. Fixing component; 417. First switch; 418. Second switch; 5. Touch control component; 51. Mounting block; 52. Third switch; 53. First carriage; 54. Second carriage; 55. Guide component; 56. Third motor; 57. Second lead screw; 58. Pressure block; 6. Control component; 61. Housing; 62. Third variable resistance component; 63. Adsorption block; 64. Spring; 65. Electromagnetic block. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] Please see Figures 1 to 15 The present invention provides a technical solution: a welding device for ventilation ducts in civil defense engineering buildings, comprising: a welding machine body 11, a guide rail frame 12 provided on the welding machine body 11, and a welding torch 13 provided on one side of the guide rail frame 12;

[0041] It also includes: clamping component 2, which is disposed on the upper side of the welding machine body 11 and is used to clamp the air duct;

[0042] The detection component 3 is located on one side of the clamping component 2. The detection component 3 automatically adjusts the welding power of the welding machine body 11 according to the detected duct wall thickness.

[0043] Adjustment component 4 is located on one side of clamping component 2. Adjustment component 4 automatically adjusts the area of ​​the corner and middle of the air duct according to the long side dimension of the air duct.

[0044] Touch component 5 is located on the upper side of the welding machine body 11. Touch component 5 adjusts the power and trigger timing according to the adjustment of the corner and middle areas of the air duct by the adjustment component 4.

[0045] The control component 6 is located on the upper side of the welding machine body 11. The control component 6 automatically adjusts the welding power of the corner and middle areas of the duct according to the adjustment component 4 and the triggering of the touch component 5.

[0046] When welding a rectangular duct to a flange using the laser welding machine body 11, the welding torch 13 can be adjusted in the front-back, left-right, and height directions via the guide rail frame 12 (guide rail frame 12 is existing publicly available technology) to weld the duct to the flange. The clamping assembly 2 clamps and fixes the duct, ensuring stability during welding. The detection assembly 3 detects the duct wall thickness and automatically adjusts the welding power of the welding machine body 11 based on the duct wall thickness. The adjustment assembly 4 adjusts the power based on the long side dimension of the duct while the clamping assembly 2 is holding it. The size is automatically adjusted to the range of the corner and middle areas under the current duct size. Through the touch component 5, the trigger timing under the current corner and middle area range can be adjusted according to the adjustment component 4. When the touch component 5 is triggered, the control component 6 adjusts the welding power of the corner and middle areas under the current duct size according to the adjustment of the corner and middle area range. This prevents the duct corner from having insufficient penetration, the middle from having flexural deformation or the weld from being brittle, which may occur during welding, and improves the welding effect between the duct and the flange.

[0047] The clamping assembly 2 includes a support member 21 fixed on the upper side of the welding machine body 11. Two first supports 22 and two second supports 23 are symmetrically arranged on the upper side of the welding machine body 11. A bidirectional lead screw 25 is threaded between the two first supports 22 and the two second supports 23. The output end of a first motor 26 is fixed to one end of the two bidirectional lead screws 25. The first motor 26 is fixed on the upper side of the welding machine body 11. Two support blocks 27 are rotatably arranged on both sides of the two bidirectional lead screws 25. The support blocks 27 are fixed on the upper side of the welding machine body 11 and can support and limit the movement of the bidirectional lead screws 25. Guide rods 24 are slidably arranged between the two first supports 22 and the two second supports 23. The guide rods 24 are fixed on the upper side of the welding machine body 11 and can guide the movement of the first supports 22 and the second supports 23 respectively.

[0048] Clamping members 28 are respectively provided on the side of the two first brackets 22 and the second bracket 23 that are close to each other. A first mounting groove adapted to the clamping member 28 is provided on one side of the two first brackets 22 and the second bracket 23. The clamping member 28 is set in the first mounting groove. Multiple balls 29 are movably arranged at equal intervals on one side of the clamping member 28. During the process of clamping the air duct through the clamping member 28 on one side of the first bracket 22 and the second bracket 23, the balls 29 can roll along the outer side of the air duct to prevent the air duct from being greatly worn during clamping. Pressure sensors 210 are respectively provided on the inner side of the first bracket 22 and the second bracket 23. The clamping member 28 abuts against one side of the pressure sensor 210.

[0049] During welding, the workers first spot weld the outer side of the connection between the duct and the flange to fix it. Then, the duct is placed on the support 21, and the rear side wall of the duct is placed between the clamping block 34 and the rear clamping member 28, with the long side of the duct in the front-to-back direction. Then, the two first motors 26 are controlled to work. The output end of the first motor 26 drives the bidirectional lead screw 25 to rotate, so that the two first supports 22 and the two second supports 23 move closer to each other, so that the four clamping members 28 clamp and fix the four sides of the duct. During the clamping process, when the clamping member 28 on one side of the first support 22 clamps the first support 23, the clamping member 28 clamps the first support 22. When the pressure applied by the pressure sensor 210 inside the bracket 22 reaches the set value, it indicates that the clamps 28 on one side of the two first brackets 22 have completed clamping the left and right sides of the air duct. The first motor 26 on one side of the first bracket 22 will then be automatically controlled to stop working to prevent the two first brackets 22 from moving further. Similarly, when the pressure applied by the clamps 28 on one side of the second bracket 23 to the pressure sensor 210 inside the second bracket 23 reaches the set value, it indicates that the clamps 28 on one side of the two second brackets 23 have completed clamping the front and rear sides of the air duct. The first motor 26 on one side of the second bracket 23 will then be automatically controlled to stop working.

[0050] The detection component 3 includes a mounting component 31 that is slidably disposed with the support component 21. One end of the mounting component 31 is fixedly disposed with the rear second bracket 23. An electric push rod 32 is fixedly disposed on the upper side of the mounting component 31. A movable component 33 that is slidably disposed with the support component 21 is fixedly disposed at the telescopic end of the electric push rod 32. A clamping block 34 is disposed on one side of the movable component 33. A second mounting groove that is adapted to the clamping block 34 is disposed on one side of the movable component 33. The clamping block 34 is disposed in the second mounting groove. A ball bearing 29 is also movably disposed on the side of the clamping block 34 near the rear second bracket 23. Correspondingly, another pressure sensor 210 is disposed on the side of the movable component 33 located on the clamping block 34.

[0051] During the clamping process of the duct, the movement of the second bracket 23 on the rear side will drive the synchronous movement of the mounting part 31 and the moving part 33. After the duct is clamped and fixed by the clamp 28, the electric push rod 32 is controlled to work. The extension end of the electric push rod 32 drives the moving part 33 to move to the rear. When the ball 29 on one side of the clamping block 34 abuts against the inner wall of the rear side of the duct, and when the pressure of the clamping block 34 on the pressure sensor 210 on the moving part 33 reaches the set value, the electric push rod 32 will be automatically controlled to stop working. Thus, the wall thickness of the duct can be detected by the movement distance of the clamping block 34.

[0052] A first variable resistor 35 is provided on the upper side of the mounting component 31. The first variable resistor 35 includes a support 351 fixed to the mounting component 31. A metal strip 352 and a slide rod 353 are fixed on the inner side of the support 351. A slide piece 354 is slidably disposed on the slide rod 353 and slidably disposed with the metal strip 352. The slide piece 354 is made of a conductive metal material. The resistance value of the metal strip 352 located on the side of the slide piece 354 near the moving component 33 is connected to the circuit. A connecting rod 36 fixed to the moving component 33 is fixed on one side of the slide piece 354. A protective shell 37 fixed to the mounting component 31 is provided on the outer side of the first variable resistor 35. The connecting rod 36 movably passes through the side end of the protective shell 37.

[0053] When the electric push rod 32 drives the moving part 33 to move backward, it can drive the connecting rod 36 and the sliding plate 354 to move backward. When the wall thickness of the air duct is large, the distance that the moving part 33 moves backward will be relatively small, so that the distance that the sliding plate 354 moves will be relatively small, and the effective resistance value of the metal strip 352 connected to the circuit will be small. Conversely, when the wall thickness of the air duct is small, the effective resistance value of the metal strip 352 connected to the circuit will be large. Therefore, for air ducts with large wall thickness, the welding power can be automatically adjusted to a relatively large level compared to air ducts with small wall thickness to ensure the welding effect of air ducts with large wall thickness. Thus, the welding power of the welding machine body 11 can be initially adjusted according to the wall thickness of the air duct.

[0054] Example 2

[0055] The adjustment assembly 4 includes four first telescopic members 41 and four second telescopic members 42. Each pair of first telescopic members 41 and each pair of second telescopic members 42 are symmetrically slidably disposed on the upper side of two first supports 22. Each of the two second supports 23 has two third telescopic members 43 symmetrically slidably disposed on the upper side of each of the two third supports 23. The sliding end of each first telescopic member 41 is fixed with a connecting rod 44 that slides with the second support 23. Both the first support 22 and the second support 23 are provided with a first limiting groove. The first telescopic members 41 and the second telescopic members 42 slide along the first limiting groove on the first support 22, and the third telescopic members 43 and the connecting rod 44 slide along the first limiting groove on the second support 23, so as to guide and limit the movement of the first telescopic members 41, the second telescopic members 42, the third telescopic members 43 and the connecting rod 44 respectively.

[0056] Sliding members 45 are fixedly provided on one side of each of the two rear first telescopic members 41 and the two right-side connecting rods 44. The sliding members 45 on one side of the first telescopic members 41 are slidably mounted on the upper side of the first bracket 22, and the sliding members 45 on one side of the connecting rods 44 are slidably mounted on the upper side of the second bracket 23. The upper sides of both the first bracket 22 and the second bracket 23 are provided with second limiting grooves adapted to the sliding members 45. The sliding members 45 slide along the second limiting grooves to guide and limit their movement. A second motor 46 is fixedly provided on the upper side of each of the four sliding members 45. A first lead screw 47, rotatably mounted on the output end of the second motor 46, is fixedly provided with threads that slide with the sliding members 45. The first toothed member 48 is provided, and the sliding member 45 is provided with a third limiting groove adapted to the first toothed member 48. The first toothed member 48 is slidably disposed along the third limiting groove to guide and limit the movement of the first toothed member 48. A first gear 49 is meshed and connected to one side of the first toothed member 48. A second gear 410 is fixedly disposed on the upper side of the first gear 49. The first gear 49 and the second gear 410 are rotatably disposed on the upper side of the sliding member 45. A second toothed member 411 is meshed and connected to one side of the second gear 410. The two second toothed members 411 on the upper side of the two first brackets 22 are respectively fixedly disposed with the two second telescopic members 42 on the rear side. The two second toothed members 411 on the upper side of the two second brackets 23 are respectively fixedly disposed with the two third telescopic members 43 on the right side.

[0057] A toothed condition 413 is fixedly provided on one side of each pair of second telescopic members 42 and each pair of third telescopic members 43. A third gear 414 is meshed between each pair of toothed conditions 413. A connecting member 415 is rotatably provided in the middle of the third gear 414 and is slidably provided with the toothed condition 413. The lower end of the connecting member 415 on the upper side of the first bracket 22 is fixedly provided with the first bracket 22. The lower end of the connecting member 415 on the upper side of the second bracket 23 is fixedly provided with the second bracket 23. Two fourth limiting grooves adapted to the toothed condition 413 are provided on the upper side of the connecting member 415 to guide and limit the movement of the two toothed conditions 413 respectively. A fixing member 416 is fixedly provided on one side of the first bracket 22. A first switch 417 is installed on one side of the fixing member 416. A second switch 418 is installed on one side of the sliding member 45.

[0058] During the clamping process of the duct via clamping assembly 2, the mutual approach of the two second supports 23 can drive the synchronous movement of the connecting rod 44 and the first telescopic member 41, and can also drive the synchronous movement of the two rear sliding members 45 on the first support 22. Through the threaded arrangement of the first lead screw 47 and the first gear 48, and the protrusion of the sliding member 45 on the rear side of the first gear 48, the synchronous movement of the second gear 411 and the two rear second telescopic members 42 can be driven. Through the arrangement of the gear condition 413 and the third gear 414, the movement of the two rear second telescopic members 42 can drive a rack. The movement of component 413 along the upper side of connector 415 causes the third gear 414 to rotate, thereby driving the two front second telescopic components 42 to move synchronously to the rear side through another tooth condition 413; similarly, the mutual approach of the two first brackets 22 can drive the two right connecting rods 44 to move to the left side through the two right first telescopic components 41, thereby driving the sliding component 45 on the second bracket 23 to move synchronously to the left side, and through the two tooth conditions 413 between each pair of third telescopic components 43 and the third gear 414, the two left third telescopic components 43 can move synchronously to the right side;

[0059] After the duct is clamped by the clamping assembly 2, the four first telescopic members 41, four second telescopic members 42, and four third telescopic members 43 are positioned at the four corners of the duct. By controlling the second motor 46, the output of the second motor 46 drives the first lead screw 47 to rotate, causing the first gear 48 to move away from the second motor 46. This causes the first gear 49 to rotate, which in turn drives the second gear 410 to rotate. The second gear 411 then moves the second telescopic member 42 or the third telescopic member 43 fixed to it away from the second motor 46. Through the gear condition 413 and the third gear 414, the second telescopic member 42 or the third telescopic member 43 on the other side moves closer to the second motor 46. When the first gear 48 moves to press the first switch 417, it will automatically control... When the second motor 46 stops working, the four second telescopic members 42 and the four third telescopic members 43 move away from the four corner positions of the air duct by a distance that is equal to the distance moved according to half the long side dimension of the air duct. The clamping component 2 clamps the air duct in a centered manner. By setting the gear ratio between the second gear 410 and the first gear 49, the four second telescopic members 42 and the four third telescopic members 43 can move away from the four corner positions of the air duct by a distance that is equal to the corner area range determined according to the different long side dimensions of the air duct. The distance between every two second telescopic members 42 and every two third telescopic members 43 is the middle area range of the air duct. Thus, the corner and middle area ranges under the current air duct size can be automatically adjusted according to the different long side dimensions of the air duct.

[0060] When the long side dimension of the duct is large, the movement distance of the second bracket 23 will be small, which will cause the sliding member 45 on the first bracket 22 to drive the second switch 418 to move a small distance. After the duct is clamped, the second switch 418 moves forward with the sliding member 45. When the second switch 418 is located behind the first switch 417, the first toothed member 48 will first contact the second switch 418, which will control the second motor 46 to stop working. This will prevent the corner area of ​​the duct from continuing to increase after the long side dimension of the duct reaches the set value, thus limiting the upper limit of the corner area of ​​the duct.

[0061] The touch component 5 includes two guide members 55 respectively fixed to one side of the two first brackets 22. Mounting blocks 51 are fixed to the upper sides of the telescopic ends of the first telescopic member 41, the second telescopic member 42, and the third telescopic member 43. A third switch 52 is mounted on one side of each mounting block 51. A second slide 54 is slidably arranged between the telescopic ends of every two third telescopic members 43. A first slide 53 is slidably arranged between the telescopic ends of every two first telescopic members 41 and the second telescopic member 42. The two second slides 54 are slidably arranged along the inner sides of the two first slides 53, and the two first slides 53 are respectively... Two guide members 55 are slidably arranged. A third motor 56 is fixed on the upper side of one guide member 55. A second lead screw 57 is fixed on the output end of the third motor 56. The second lead screw 57 is threaded to a first slide 53 on one side. The guide rail frame 12 is located on the four sides of the welding torch 13 and pressure blocks 58 are fixed on each side. The four pressure blocks 58 are equally spaced on the front, back, left and right sides of the welding torch 13. The side of the pressure block 58 away from the welding torch 13 is set with an arc-shaped end face to facilitate the pressing of the third switch 52. The first telescopic member 41, the second telescopic member 42 and the third telescopic member 43 can be set as multi-stage telescopic.

[0062] After adjusting component 4 to move the four first telescopic members 41, second telescopic members 42, and third telescopic members 43 to their respective positions, the mounting blocks 51 and third switches 52 on the upper sides of the first telescopic members 41, second telescopic members 42, and third telescopic members 43 will also move to their respective positions. This allows the third switches 52 on the four first telescopic members 41 to correspond to the four corner positions of the duct. The area between the third switches 52 on the left or right side of the two second telescopic members 42, and the area between the third switches 52 on the front or rear side of the two third telescopic members 43, constitute the central area of ​​the duct. The area between the third switch 52 on the second telescopic member 42 or the third telescopic member 43 and the third switch 52 on the first telescopic member 41 is the corner area of ​​the duct. By controlling the output end of the third motor 56 to drive the rotation of the second lead screw 57, the first slide 53 on the left side can be moved upward, which in turn can drive the second slides 54 on both sides and the first slide 53 on the other side to move upward synchronously, so that the telescopic ends of the first telescopic member 41, the second telescopic member 42 and the third telescopic member 43 extend upward to adjust the height position of the mounting block 51 and the third switch 52, and match the height position of the pressure block 58 during welding.

[0063] A second variable resistor 412 is provided on the upper side of the left sliding member 45. The structure of the second variable resistor 412 is the same as that of the first variable resistor 35. The support 351 of the second variable resistor 412 is fixed on the upper side of the sliding member 45. The slider 354 of the second variable resistor 412 is fixed to the second gear 411. A protective shell 37 is also provided on the outer side of the second variable resistor 412. This protective shell 37 is fixed to the sliding member 45 and can protect the second variable resistor 412. The second gear 411 moves through the side end of this protective shell 37. The metal strip 352 of the second variable resistor 412 is electrically connected to the two electromagnetic blocks 65. The resistance value of the metal strip 352 of the second variable resistor 412 located on the side of the slider 354 near the first gear 49 is connected to the circuit.

[0064] When the second motor 46 drives the first lead screw 47 to rotate, thereby causing the second gear 411 to move forward, it can simultaneously drive the slider 354 of the second variable resistor 412 to move forward. When the long side dimension of the duct is large, the distance that the second gear 411 drives the slider 354 of the second variable resistor 412 to move forward is relatively large, which reduces the resistance value of the metal strip 352 of the second variable resistor 412 connected to the circuit by a relatively large amount, making the magnetism generated by the electromagnetic block 65 relatively strong. Conversely, when the long side dimension of the duct is small, the magnetism generated by the electromagnetic block 65 is relatively weak. When the long side dimension of the duct is large, causing the first gear 48 to press against the second switch 418 and stop moving, the magnetism of the electromagnetic block 65 will not continue to increase.

[0065] The control component 6 includes a housing 61 fixed to the welding machine body 11. A third variable resistor 62 is provided inside the housing 61. The structure of the third variable resistor 62 is the same as that of the first variable resistor 35. The support 351 of the third variable resistor 62 is fixed to the bottom of the inner side of the housing 61. The resistance value of the metal strip 352 of the third variable resistor 62 located on the side of the slider 354 away from the spring 64 is connected to the circuit. An adsorption block 63 is fixed on the upper side of the slider 354 of the third variable resistor 62. The adsorption block 63 is slidably disposed with the top inner side of the housing 61. Correspondingly, a fifth limiting groove adapted to the adsorption block 63 is provided on the top inner side of the housing 61. The adsorption block 63 is slidably disposed along the fifth limiting groove, which can guide and limit the movement of the adsorption block 63. Two electromagnetic blocks 65 are fixed inside the housing 61. The electromagnetic blocks 65 can adsorb the adsorption block 63. A spring 64 fixed to the inner wall of the housing 61 is fixed on one side of the adsorption block 63.

[0066] During welding, the height of the welding torch 13 and the pressure block 58 is adjusted to control the height of the mounting blocks 51 and the third switch 52 on the first telescopic member 41, the second telescopic member 42, and the third telescopic member 43. The guide rail 12 is used to adjust the forward / backward and left / right positions of the welding torch 13. This allows the rear pressure block 58 to first press against the third switch 52 on the left rear third telescopic member 43. Subsequently, the welding of the duct and flange is automatically controlled. When the pressure block 58 presses against the third switch 52 on the left rear third telescopic member 43, it connects the metal strip 352 of the second variable resistor 412 with the electromagnetic block 65 near the spring 64, causing the electromagnetic block 65 near the spring 64 to exert force on the adsorption block 63. The adsorption effect causes the adsorption block 63 to move the slider 354 of the third variable resistor 62 closer to the spring 64, compressing the spring 64 and increasing the resistance value of the metal strip 352 of the third variable resistor 62 connected to the circuit. This further reduces the welding power based on the initial adjustment of the detection component 3 according to the duct wall thickness. Subsequently, the guide rail 12 controls the welding torch 13 to move to the right to weld the middle area of ​​the rear side of the duct, preventing bending deformation or weld brittleness during welding in the middle area. When the right pressure block 58 moves to press the third switch 52 on the right rear third telescopic component 43, it controls the metal strip 352 of the second variable resistor 412 to connect with the electromagnetic block 65 on the side away from the spring 64. The circuit is connected and disconnected from the circuit of the electromagnetic block 65 near the spring 64, so that the adsorption block 63 can move the slider 354 of the third variable resistor 62 away from the spring 64. The spring 64 extends, which reduces the resistance value of the metal strip 352 of the third variable resistor 62 connected to the circuit. This further increases the welding power based on the initial adjustment of the detection component 3 according to the duct wall thickness. Subsequently, the welding torch 13 will weld the right rear corner area of ​​the duct to prevent insufficient penetration when welding the corner area. When the right pressure block 58 moves to press the third switch 52 on the right rear first telescopic component 41, it will control the guide rail frame 12 to move the welding torch 13 forward. When the right pressure block 58 moves to press the third switch 52 on the right rear second telescopic member 42, it will control the metal strip 352 of the second variable resistor 412 to connect with the electromagnetic block 65 near the spring 64 and disconnect from the electromagnetic block 65 on the other side to reduce the welding power and weld the middle area of ​​the right side of the air duct. Similarly, the automatic adjustment when welding around the air duct can increase the welding power of the four corner areas of the air duct and reduce the welding power of the four middle areas of the air duct to ensure the welding effect between the air duct and the flange. When the rear pressure block 58 presses the third switch 52 on the left rear third telescopic member 43 again, it indicates that the welding is completed and the welding will stop automatically.

[0067] When the long side of the duct is large, the magnetism generated by the electromagnetic block 65 is relatively strong. Therefore, when adjusting the welding power at the corners and middle of the duct, the electromagnetic block 65 can attract the adsorption block 63 more strongly. This results in a relatively large increase or decrease in the resistance value of the metal strip 352 of the third variable resistor 62 connected to the circuit. Consequently, the welding power is increased more significantly when welding at the corners and decreased more significantly when welding at the middle. Thus, the welding power can be automatically adjusted according to the size of the duct to improve the welding effect between the duct and the flange.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for ventilation ducts in civil defense engineering buildings, comprising: The welding machine body is provided with a guide rail frame, and a welding torch is provided on one side of the guide rail frame; Its features include: a clamping assembly, which is disposed on the upper side of the welding machine body and is used to clamp the air duct; The detection component is located on one side of the clamping component, and the detection component automatically adjusts the welding power of the welding machine body according to the detected duct wall thickness. An adjustment component is provided on one side of the clamping component. The adjustment component automatically adjusts the area of ​​the corner and middle of the air duct according to the long side dimension of the air duct. A touch control component is disposed on the upper side of the welding machine body. The touch control component adjusts the power and trigger timing according to the adjustment of the corner and middle areas of the air duct by the adjustment component. The control component is located on the upper side of the welding machine body. The control component automatically adjusts the welding power of the corner and middle areas of the duct according to the adjustment component's adjustment range and through the triggering of the touch component. The clamping assembly includes a support fixed to the upper side of the welding machine body. Two first supports and two second supports are symmetrically arranged on the upper side of the welding machine body. A bidirectional lead screw is threaded between the two first supports and the two second supports. The output end of a first motor is fixed to one end of each of the two bidirectional lead screws. The first motor is fixed to the upper side of the welding machine body. Two support blocks are rotatably arranged on both sides of each of the two bidirectional lead screws. The support blocks are fixed to the upper side of the welding machine body. A guide rod is slidably arranged between the two first supports and the two second supports. The guide rod is fixed to the upper side of the welding machine body. The detection component includes a mounting component that is slidably disposed with the support member. One end of the mounting component is fixed to the second rear bracket. An electric push rod is fixed to the upper side of the mounting component. A movable component that is slidably disposed with the support member is fixed to the telescopic end of the electric push rod. A clamping block is provided on one side of the movable component. The mounting component is provided with a first variable resistance component on its upper side. The first variable resistance component includes a support fixed to the mounting component. A metal strip and a sliding rod are fixed to the inner side of the support. A sliding piece that is slidably disposed on the sliding rod and slidably disposed on the metal strip is provided on one side of the sliding piece and a connecting rod fixed to the moving component is provided on the outer side of the first variable resistance component and a protective shell fixed to the mounting component is provided. The connecting rod movably passes through the side end of the protective shell. The adjustment assembly includes four first telescopic members and four second telescopic members. Each pair of first telescopic members and each pair of second telescopic members are symmetrically slidably arranged on the upper side of two first supports. Each of the two second supports has two third telescopic members symmetrically slidably arranged on the upper side of two supports. The sliding end of each of the first telescopic members is fixed with a connecting rod that is slidably arranged with the second support. Sliding members are fixedly provided on one side of the two first telescopic members on the rear side and the two connecting rod members on the right side. The sliding members on one side of the first telescopic members are slidably disposed on the upper side of the first bracket. The sliding members on one side of the connecting rod members are slidably disposed on the upper side of the second bracket. A second motor is fixedly provided on the upper side of each of the four sliding members. A first lead screw is fixedly provided at the output end of the second motor and is rotatably disposed with the sliding member. A first tooth is threaded on the first lead screw and is slidably disposed with the sliding member. A first gear is meshed on one side of the first tooth. A second gear is fixedly provided on the upper side of the first gear. The first gear and the second gear are rotatably disposed on the upper side of the sliding member. A second tooth is meshed on one side of the second gear. Two second teeth on the upper side of the two first brackets are respectively fixed to the two second telescopic members on the rear side. Two second teeth on the upper side of the two second brackets are respectively fixed to the two third telescopic members on the right side. The touch component includes two guide members fixedly mounted on one side of two first brackets. Mounting blocks are fixedly mounted on the upper sides of the telescopic ends of the first, second, and third telescopic members. A third switch is mounted on one side of each mounting block. A second carriage is slidably arranged between the telescopic ends of every two third telescopic members. A first carriage is slidably arranged between the telescopic ends of every two first and second telescopic members. Two second carriages are slidably arranged along the inner sides of the two first carriages. Two first carriages are slidably arranged with the two guide members. A third motor is fixedly mounted on the upper side of one guide member. A second lead screw is fixedly mounted on the output end of the third motor. The second lead screw is threaded onto one side of a first carriage. Pressure blocks are fixedly mounted on the four sides of the guide rail frame located on the welding torch.

2. The welding device for ventilation ducts in civil defense engineering buildings according to claim 1, characterized in that: Clamping members are respectively provided on the side of the first bracket and the second bracket that are close to each other. Multiple ball bearings are movably arranged at equal intervals on one side of the clamping members. Pressure sensors are respectively provided on the inner side of the first bracket and the second bracket.

3. The welding device for ventilation ducts in civil defense engineering buildings according to claim 1, characterized in that: A toothed condition is fixed on one side of each pair of second telescopic members and each pair of third telescopic members. A third gear is meshed between each pair of toothed conditions. A connecting member that is rotatably disposed in the middle of the third gear and slidably disposed with the toothed condition is provided. The lower end of the connecting member on the upper side of the first bracket is fixed to the first bracket. The lower end of the connecting member on the upper side of the second bracket is fixed to the second bracket. A fixing member is fixed on one side of the first bracket. A first switch is installed on one side of the fixing member. A second switch is installed on one side of the sliding member. A second variable resistor is disposed on the upper side of the left sliding member. The structure of the second variable resistor is the same as that of the first variable resistor. The sliding plate of the second variable resistor is fixed to the second toothed member.

4. The welding device for ventilation ducts in civil defense engineering buildings according to claim 1, characterized in that: The control component includes a housing fixed to the welding machine body. A third variable resistor is provided inside the housing. The structure of the third variable resistor is the same as that of the first variable resistor. An adsorption block is fixed on the upper side of the slider of the third variable resistor. The adsorption block is slidably disposed with the top inner side of the housing. Two electromagnetic blocks are fixed inside the housing. A spring is fixed on one side of the adsorption block and is fixed to the inner wall of the housing.

Images