Welding argon filling protection device

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to a welding argon filling protection device. The argon filling protection device for welding is good in using effect. The device comprises a protective shell 1 with an open upper end, and is characterized in that an air inlet pipe 3 is arranged on the protective shell 1, one side of the protective shell 1 is connected with one side of a connecting plate 4, the other side of the connecting plate 4 is connected with one side of a cantilever plate 11, the cantilever plate 11 is movably connected with a wall thickness pulling plate 9 and an adjusting supporting plate 12, and the wall thickness pulling plate 9 and the adjusting supporting plate 12 are arranged in the transverse direction; the wall thickness pulling plate 9 and the adjusting supporting plate 12 can move up and down and back and forth relative to the cantilever plate 11 and can be locked and positioned; a hanging plate 15 is arranged at the upper ends of the wall thickness pulling plate 9 and the adjusting supporting plate 12, and the upper ends of the wall thickness pulling plate 9 and the adjusting supporting plate 12 are arranged in a transverse strip-shaped groove 33 in the hanging plate 15.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to a welding argon gas protection device. Background Art

[0002] When argon arc welding materials such as stainless steel, titanium, nickel, P91, and P92, argon gas shielding is required on the backside to achieve good weld quality. Many large tanks require complete flushing of the interior with argon gas to completely displace the air before welding. Some tanks also require dedicated personnel to flush the backside with argon gas for shielded welds (one person welding, another flushing), resulting in high gas and labor costs. Summary of the Invention

[0003] The present invention aims to solve the above problems and provides a welding argon protection device with good use effect.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme, which includes a protective shell 1 with an open upper end, characterized in that an air intake pipe 3 is provided on the protective shell 1, one side of the protective shell 1 is connected to one side of the connecting plate 4, and the other side of the connecting plate 4 is connected to one side of the cantilever plate 11, and the cantilever plate 11 is movably connected with a wall thickness pull plate 9 and an adjustment support plate 12, which are arranged horizontally, and can be moved up and down, front and back relative to the cantilever plate 11 and can be locked in position; a hanging plate 15 is provided on the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12, and the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12 are placed in the horizontal strip groove 33 on the hanging plate 15.

[0005] As a preferred solution, a transverse partition 2 is provided in the middle of the protective shell 1 of the present invention, a through hole 16 is provided on the transverse partition 2, and an air inlet pipe 3 is provided at the lower end of the protective shell 1.

[0006] As another preferred solution, the air inlet pipe 3 of the present invention is arranged at the lower end of the protective shell close to the connecting plate 4.

[0007] As another preferred solution, the through holes 16 of the present invention are multiple and evenly distributed on the transverse partition 2 .

[0008] As another preferred solution, the cross-sectional area of ​​a single through hole 16 of the present invention is smaller than the cross-sectional area of ​​the inner diameter of the air intake pipe 3 , and the total cross-sectional area of ​​the plurality of through holes 16 is not smaller than the cross-sectional area of ​​the inner diameter of the air intake pipe 3 .

[0009] As another preferred solution, the lower end of the cantilever plate 11 of the present invention has a plurality of limit blocks 17 extending forward.

[0010] As another preferred solution, the present invention has three limit blocks 17 , one limit block 17 is set at the front end of the cantilever plate 11 , one limit block 17 is set at the front of the cantilever plate 11 , and one limit block 17 is set in the middle of the cantilever plate 11 .

[0011] As another preferred solution, the upper end of the cantilever plate 11 of the present invention has a support plate 18 extending upward and bending backward.

[0012] As another preferred solution, the support plate 18 of the present invention is arranged at the front end of the cantilever plate 11 .

[0013] As another preferred embodiment, the connecting plate 4 of the present invention is a transverse L-shaped plate, the short transverse plate of the transverse L-shaped plate is connected to the protective shell 1, the long transverse plate of the transverse L-shaped plate is provided with a first positioning pin hole on the upper outer side, and the long transverse plate of the transverse L-shaped plate is provided with an arc-shaped adjustment hole 5 on the lower outer side; A second positioning pin hole 19 is provided on the upper portion of the cantilever plate 11 near the connecting plate 4, corresponding to the first positioning pin hole. A connecting hole 20 is provided on the lower portion of the cantilever plate 11 near the connecting plate 4, corresponding to the arc-shaped adjustment hole 5. The positioning pin shaft 7 passes through the first positioning pin hole and the second positioning pin hole 19; The bolt passes through the arc-shaped adjustment hole 5 and the connecting hole 20, and the curvature adjustment knob 6 is screwed onto the bolt.

[0014] As another preferred embodiment, the wall thickness pull plate 9 of the present invention is provided with a pull plate strip-shaped notch 21 along the length of the wall thickness pull plate 9, a pull plate upper end head 24 is provided on the inner side of the upper end of the wall thickness pull plate 9, the lower end outer side of the pull plate upper end head 24 is connected to the inner upper end of the pull plate inclined surface 22, and a pull plate limiting groove 23 is provided on the wall thickness pull plate 9 below the outer lower end of the pull plate inclined surface 22, and the pull plate limiting groove 23 is provided above the pull plate strip-shaped notch 21; a pull plate spring clamping groove 25 is provided on the wall thickness pull plate 9 on the inner side below the pull plate strip notch 21; A support plate strip-shaped notch 28 is provided in the middle of the adjusting support plate 12 along the length of the adjusting support plate 12, a support plate upper end head 29 is provided on the inner side of the upper end of the adjusting support plate 12, the outer side of the lower end of the support plate upper end head 29 is connected to the inner upper end of the support plate inclined surface 26, and a support plate limiting groove 27 is provided on the adjusting support plate 12 below the outer lower end of the support plate inclined surface 26, and the support plate limiting groove 27 is provided above the support plate strip-shaped notch 28; a support plate spring clamping groove 30 is provided on the adjusting support plate 12 on the inner side below the support plate strip notch 28; One end of the spring 10 is hooked into the pull plate spring slot 25, and the other end of the spring 10 is hooked into the support plate spring slot 30; The cantilever plate 11 is provided with a wall thickness adjustment threaded hole 31 and a positioning threaded hole 32 along the transverse direction; The wall thickness adjustment knob 13 is a bolt with a handle on the bolt head, and the bolt passes through the support plate strip-shaped notch 28 and is screwed into the wall thickness adjustment threaded hole 31; The positioning knob 8 is a bolt with a screw handle on the bolt head. The bolt passes through the strip-shaped notch 21 of the pull plate and is screwed into the positioning threaded hole 32 .

[0015] As another preferred solution, the protective shell 1 of the present invention is a stainless steel protective shell.

[0016] Secondly, the thickness of the wall thickness pulling plate 9 and the adjusting support plate 12 of the present invention is 1 mm to 1.2 mm.

[0017] In addition, the width of the hanging plate 15 of the present invention is greater than 50 mm.

[0018] The present invention has beneficial effects.

[0019] The present invention uses a hanging plate 15 to cooperate with the cantilever plate 11 and the protective shell 1 to be hung on the weldment 14, and the hanging tightness is adjusted by the wall thickness pull plate 9 and the adjustment support plate 12; the air inlet pipe 3 is connected to the argon gas output end, and the argon gas rushes from the opening at the upper end of the protective shell 1 to the welding position of the weldment 14. When the welder is welding, he can push the device of the present invention to move with the welding position. The welder can control the argon gas rushing and complete the welding at the same time. There is no need for a dedicated person to rush the argon gas. One person can complete the argon arc welding work. In addition, the argon gas of the present invention is directed to the welding position of the weldment 14, eliminating the need to use the existing internal complete stamping and air replacement method, saving gas costs or labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the cantilever plate structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the wall thickness pulling plate structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the adjustable support plate structure of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the protective shell of the present invention in the unfolded state.

[0026] Figure 6 It is a structural schematic diagram of the folding process of the protective shell of the present invention.

[0027] Figure 7 It is a schematic diagram of the cross-section structure of the protective shell of the present invention.

[0028] Figure 8 、 9It is a schematic diagram of the structure of the present invention arranged between two weldments.

[0029] Figure 10 It is a schematic diagram of the protective shell structure of the present invention.

[0030] In the figure, 1 is a protective shell, 2 is a transverse partition, 3 is an air intake pipe, 4 is a connecting plate, 5 is an arc-shaped adjustment hole, 6 is a curvature adjustment knob, 7 is a positioning pin, 8 is a positioning knob, 9 is a wall thickness pull plate, 10 is a spring, 11 is a curvature adjustment cantilever plate, 12 is an adjustment support plate, 13 is a wall thickness adjustment knob, 14 is a weldment, 15 is a hanging plate, 16 is a through hole, 17 is a limit block, 18 is a support plate, 19 is a second positioning pin hole, 20 is a connecting hole, 21 is a pull plate strip notch, 22 is a pull plate inclined surface, 23 is a pull plate limiting groove, 24 is the upper end of the pull plate, 25 is the pull plate spring slot, 26 is the support plate inclined surface, 27 is the support plate limiting groove, 28 is the support plate strip notch, 29 is the upper end of the support plate, 30 is the support plate spring slot, 31 is the wall thickness adjustment threaded hole, 32 is the positioning threaded hole, 33 is the horizontal strip groove, 34 is the inner wall, 35 is the wall thickness, 36 is the outer wall, 37 is the bevel, 38 is the isosceles trapezoidal plate, 39 is the horizontal rectangular plate, 40 is the right-angled trapezoidal plate, 41 is the rectangular plate, 42 is the upper end position of the intersection, and 43 is the hole for installing the rivet. DETAILED DESCRIPTION

[0031] As shown in the figure, the present invention includes a protective shell 1 with an open upper end, an air intake pipe 3 is provided on the protective shell 1, one side of the protective shell 1 is connected to one side of the connecting plate 4, and the other side of the connecting plate 4 is connected to one side of the cantilever plate 11, and the cantilever plate 11 is movably connected with a wall thickness pull plate 9 and an adjustment support plate 12, which are arranged horizontally, and can be moved up and down, front and back relative to the cantilever plate 11 and can be locked in position; a hanging plate 15 is provided on the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12, and the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12 are placed in the horizontal strip groove 33 on the hanging plate 15.

[0032] The protective shell 1 is provided with a transverse partition 2 in the middle thereof, and a through hole 16 is provided on the transverse partition 2. The air inlet pipe 3 is provided at the lower end of the protective shell 1. The protective shell 1 is divided into two chambers (such as Figure 1 、 10 As shown), there is a transverse partition 2 in the middle, and a through hole 16 is provided on the transverse partition 2, which can evenly distribute, disperse and slow down the gas rushing in from the intake pipe 3, avoiding direct impact on the welding arc and causing welding defects.

[0033] Testing has revealed that placing the diaphragm 2 near the open side (i.e., the upper portion of the protective shell 1) increases the risk of arc burns during welding. If the diaphragm 2 is placed near the other side (i.e., the lower portion of the protective shell 1), the air entering from the air intake pipe 3 may not be evenly distributed throughout the space, resulting in localized excessive airflow, which can affect the welding arc and cause welding defects. Therefore, placing the diaphragm 2 in the middle of the protective shell 1 provides optimal performance.

[0034] The air intake pipe 3 is arranged at the lower end of the protective shell near the connecting plate 4. The air intake pipe 3 is not located at the center of the protective shell 1, but near the connecting plate 4; shorten the air intake pipe 3 and the right end of the cantilever plate 11 (such as Figure 1 As shown in FIG, the length of the lever arm formed by the fulcrum (i.e., the support plate 18) is increased to reduce friction during movement.

[0035] There are multiple through holes 16 evenly distributed on the diaphragm 2 .

[0036] The cross-sectional area of ​​each through hole 16 is smaller than the cross-sectional area of ​​the inner diameter of the intake pipe 3, and the total cross-sectional area of ​​the plurality of through holes 16 is no less than the cross-sectional area of ​​the inner diameter of the intake pipe 3, thereby achieving the effect of dispersing the airflow and reducing the intake flow velocity. The drawings are for schematic purposes only. To ensure visual clarity, the ratio of the cross-sectional area of ​​the through hole 16 to the cross-sectional area of ​​the inner diameter of the intake pipe 3 is subject to the text.

[0037] The lower end of the cantilever plate 11 has a plurality of limit blocks 17 extending forward.

[0038] There are three limit blocks 17 , one limit block 17 is set at the front end of the cantilever plate 11 , one limit block 17 is set at the front of the cantilever plate 11 , and one limit block 17 is set at the middle of the cantilever plate 11 .

[0039] The limiting block 17 is made by bending a plate.

[0040] like Figure 2 As shown, the two limit blocks 17 on the left side (i.e., the front limit block 17 and the front limit block 17, with the adjustment support plate 12 placed between the front limit block 17 and the front limit block 17) can limit the adjustment support plate 12 from swinging left and right, and the adjustment support plate 12 can only be adjusted up and down by loosening the wall thickness adjustment knob 13.

[0041] The limiting block 17 in the middle can make the wall thickness pull plate 9 rotate only clockwise after installation, and the upper left end of the wall thickness pull plate 9 is stuck in the left end of the horizontal strip groove 33, as shown in FIG. Figure 1To install the present invention, press down on the hanging plate 15 or push the upper end of the wall thickness pull plate 9 toward the adjustment support plate 12. The wall thickness pull plate 9 rotates clockwise, allowing the upper end of the wall thickness pull plate 9 to enter the horizontal strip groove 33. The spring 15 is in a stretched state, keeping the wall thickness pull plate 9 and the upper end of the adjustment support plate 12 engaged in the horizontal strip groove 33. To disassemble the present invention, press the upper end of the wall thickness pull plate 9 toward the adjustment support plate 12, that is, rotate the wall thickness pull plate 9 clockwise, and lift the hanging plate 15 to separate the hanging plate 15 from the wall thickness pull plate 9.

[0042] The upper end of the cantilever plate 11 has a support plate 18 that extends upward and bends backward. The fulcrum (support plate 18) of the cantilever plate 11 is used to press against the inner wall 34 of the weldment 14.

[0043] The support plate 18 is provided at the front end of the cantilever plate 11. The support plate 18 presses against the inner wall 34 of the weldment 14. The wall thickness pull plate 9 is hung on the hanging plate 15 through the positioning knob 8, the curvature adjustment cantilever plate 11 and the protective shell 1 to form a horizontal lever, so that the opening side of the protective shell 1 is in contact with the inner wall 34 of the weldment 14.

[0044] The connecting plate 4 is a transverse L-shaped plate, the short transverse plate of the transverse L-shaped plate is connected to the protective shell 1 (the short transverse plate of the transverse L-shaped plate and the protective shell 1 can be connected by rivets), the long transverse plate of the transverse L-shaped plate is provided with a first positioning pin hole on the upper outer side, and the long transverse plate of the transverse L-shaped plate is provided with an arc-shaped adjustment hole 5 on the lower outer side; A second positioning pin hole 19 is provided on the upper portion of the cantilever plate 11 near the connecting plate 4, corresponding to the first positioning pin hole. A connecting hole 20 is provided on the lower portion of the cantilever plate 11 near the connecting plate 4, corresponding to the arc-shaped adjustment hole 5. The positioning pin shaft 7 passes through the first positioning pin hole and the second positioning pin hole 19; The bolt passes through the arc-shaped adjustment hole 5 and the connecting hole 20, and the curvature adjustment knob 6 is screwed onto the bolt. The curvature adjustment knob 6 can adopt a nut with a rotating handle.

[0045] By adjusting the angle between the cantilever plate 11 and the protective shell 1, the protective shell 1 is fitted to the inner wall 34 of the weldment 14, and then the curvature adjustment knob 6 is tightened. Because the curvature of the inner wall 34 of the weldment 14 is not fixed, some have large diameters, some have small diameters, and some are straight.

[0046] The positioning pin shaft 7 can be a bolt assembly, and a spring washer can be set to maintain a certain degree of tightness to facilitate rotation.

[0047] The connecting plate 4 has an arc-shaped adjustment hole 5 for adjusting the angle formed by the cantilever plate 11 and the protective shell 1, so that the arc curvature formed by the two sides of the upper end of the protective shell 1 and the support point of the cantilever plate 11 (i.e., the upper end of the support plate 18) is equal to the curvature of the inner wall 34 of the weldment 14, i.e., the left side of the cantilever plate 11 ( Figure 1) can rotate about the positioning pin 7, so that the arc-shaped adjustment hole 5 corresponds to the rotation trajectory of the curvature adjustment knob 6. After adjustment, tighten the curvature adjustment knob 6. By adjusting the pull plate 9, the upper end of the protective shell 1 is aligned with the inner wall 34 of the weldment 14, which is suitable for welding annular welds on weldments 14 of different diameters.

[0048] A pull plate strip-shaped notch 21 is provided in the middle of the wall-thick pull plate 9 along the length of the wall-thick pull plate 9, a pull plate upper end head 24 is provided on the inner side of the upper end of the wall-thick pull plate 9, the lower end outer side of the pull plate upper end head 24 is connected to the inner upper end of the pull plate inclined surface 22, a pull plate limiting groove 23 is provided on the wall-thick pull plate 9 below the outer lower end of the pull plate inclined surface 22, and the pull plate limiting groove 23 is provided above the pull plate strip-shaped notch 21; a pull plate spring clamping groove 25 is provided on the wall-thick pull plate 9 on the inner side below the pull plate strip-shaped notch 21; A support plate strip-shaped notch 28 is provided in the middle of the adjusting support plate 12 along the length of the adjusting support plate 12, a support plate upper end head 29 is provided on the inner side of the upper end of the adjusting support plate 12, the outer side of the lower end of the support plate upper end head 29 is connected to the inner upper end of the support plate inclined surface 26, and a support plate limiting groove 27 is provided on the adjusting support plate 12 below the outer lower end of the support plate inclined surface 26, and the support plate limiting groove 27 is provided above the support plate strip-shaped notch 28; a support plate spring clamping groove 30 is provided on the adjusting support plate 12 on the inner side below the support plate strip notch 28; One end of the spring 10 is hooked into the pull plate spring slot 25, and the other end of the spring 10 is hooked into the support plate spring slot 30; The cantilever plate 11 is provided with a wall thickness adjustment threaded hole 31 and a positioning threaded hole 32 along the transverse direction; The wall thickness adjustment knob 13 is a bolt with a handle on the bolt head, and the bolt passes through the support plate strip-shaped notch 28 and is screwed into the wall thickness adjustment threaded hole 31; The positioning knob 8 is a bolt with a screw handle on the bolt head. The bolt passes through the strip-shaped notch 21 of the pull plate and is screwed into the positioning threaded hole 32 .

[0049] The wall thickness pull plate 9 has a strip-shaped notch 21, which can adjust the upper and lower positions of the cantilever plate 11 according to the wall thickness 35 and curvature of the weldment 14 so that the upper end of the device fits the inner wall 34 of the weldment 14.

[0050] The upper parts of the wall thickness pull plate 9 and the adjustment support plate 12 are provided with a pull plate inclined surface 22 and a support plate inclined surface 26. During installation, by pressing the hanging plate 15, the spring 10 can be stretched and slide into the limiting groove 23 to hang the device on the weldment 14.

[0051] The protective shell 1 is made of stainless steel and can be made of stainless steel sheet material to meet the requirements of many industries for not polluting nonferrous metals.

[0052] The thickness of the wall thickness pull plate 9 and the adjusting support plate 12 is 1mm to 1.2mm. The reserved gap of the weld seam of argon arc welding is generally 1.5mm to 3mm. The wall thickness pull plate 9 and the adjusting support plate 12 with a thickness of 1mm to 1.2mm can smoothly pass through the reserved gap between the two weldments 14 (such as Figure 8 、 9 As shown), it is convenient to move the protective shell 1 during the welding process.

[0053] The width of the hanging plate 15 is greater than 50 mm. This ensures that the hanging plate 15 does not fall into the groove 37 of the weldment 14. The length of the horizontal groove 33 is required to ensure that the spring 10 between the wall thickness pull plate 9 and the adjustment support plate 12 is in a stretched state after installation (the stretched state keeps the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12 tilted outward, and the pull plate retaining groove 23 and the support plate retaining groove 27 do not fall out of the horizontal groove 33), thereby preventing the device from falling.

[0054] like Figure 5 、 6 As shown, the protective shell 1 can be made by folding a whole thin plate, and the thin plate includes a horizontal rectangular plate 39, and the front and rear ends of the left side of the horizontal rectangular plate 39 have an isosceles trapezoidal plate 38 extending outward, and the front and rear ends of the right side of the horizontal rectangular plate have a rectangular plate 41 extending outward, and the horizontal rectangular plates 39 on both sides of the rectangular plate 41 have right-angled trapezoidal plates 40 extending outward; the long bottom of the isosceles trapezoidal plate 38 is a bending edge; the line connecting the left ends of the two isosceles trapezoidal plates 38 is a bending edge; the line connecting the right ends of the two isosceles trapezoidal plates 38 is a bending edge; the line connecting the left ends of the two right-angled trapezoidal plates 40 on the left is a bending edge; the line connecting the right ends of the two right-angled trapezoidal plates 40 on the right is a bending edge; the bottom edge of the right-angled trapezoidal plate 40 is a bending edge; the inner side edge of the rectangular plate 41 is a bending edge; the through hole 16 is arranged on the left side of the horizontal rectangular plate 39, and the air intake pipe 3 is arranged on the right side of the horizontal rectangular plate 39. The protective shell 1 is made by folding a whole thin plate, which is easy to manufacture and low in cost.

[0055] Holes for installing rivets can be provided at both ends of the transverse rectangular plate 39, both ends of the rectangular plate 41, and both sides of the right-angled trapezoidal plate 40 to facilitate connection after folding.

[0056] The working process of the present invention will be described below with reference to the accompanying drawings.

[0057] Two weldments 14 such as Figure 8 、 9 As shown, the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12 pass through the gap between the two weldments 14 to be welded and are placed above the two weldments 14. The hanging plate 15 is pressed downward from the top, and the upper ends of the wall thickness pull plate 9 and the adjustment support plate 12 enter the horizontal strip groove 33. The spring 15 is in a stretched state, and the lower end of the hanging plate 15 is connected to the outer wall 36 of the two weldments 14. The device of the present invention is hung between the two weldments 14.

[0058] Make the upper end of the protective shell 1 stick to the inner wall 34 of the weldment 14, adjust the cantilever plate 11, and the left end of the cantilever plate 11 is rotated around the positioning pin 7 (such as Figure 1 As shown), the upper end of the support plate 18 is attached to the inner wall 34 of the weldment 14, and the curvature adjustment knob 6 is tightened.

[0059] Tightening the wall thickness adjustment knob 13 and the positioning knob 8 is equivalent to the device being clamped on the wall thickness 35 of the weldment 14 through the hanging plate 15, the upper end of the protective shell 1 and the upper end of the support plate 18. At the same time, an appropriate gap can be maintained between the upper end of the protective shell 1 and the upper end of the support plate 18 and the inner wall 34 of the weldment 14, so that the device can be pushed laterally.

[0060] The welding process is to weld the upper end position 42 ( Figure 8 The above figure is only to show the welding position clearly. In the specific operation, the welding should be carried out in sequence according to the position corresponding to the upper opening of the protective shell 1). Figure 8 shown.

[0061] During welding, a gap of 2mm to 4mm must be left between the two weldment components 14. The wall-thickness tension plate 9 and the adjustment support plate 12 are sandwiched between the two weldment components 14 and do not interfere with welding. Only boards with a thickness of 1mm to 3mm can be welded without leaving a gap, such as stoves and wash basins. The device of the present invention is not intended for such thinner products, but rather for the boiler and container industry, where thicker boards, typically 3mm or thicker, are used. The gap left is filled with welding material.

[0062] The positioning knob 8 and the wall thickness adjustment knob 13 are placed under the two weldments 14, as shown in FIG. Figure 9 shown.

[0063] When welding the straight seam, the connecting plate 4 is parallel to the cantilever plate 11 , and the upper end of the protective shell 1 and the upper end of the support plate 18 are on the same plane.

[0064] When in use, it can be operated by one person, pushing and adjusting the end of the support plate 12 while welding, and the mobile device can achieve continuous welding protection. The welding gun is above the upper end position 42 of the intersection of the groove 37 of the two weldments 14 (i.e. above the weld seam, such as Figure 8 shown).

[0065] Although the device of the present invention must follow the welding position during use, it requires a certain amount of friction to maintain contact with the weldment 14. This is because the weld sometimes has a certain degree of inclination during welding, especially in circumferential welds. If the friction is too low, it will easily slip and become unstable. Therefore, it is not necessary to provide sliding structures (such as rolling balls) at the contact points between the upper end of the protective shell 1 and the inner wall 34 of the weldment 14, the contact points between the lower end of the hanging plate and the outer wall 36 of the weldment 14, and the contact points between the upper end of the support plate 18 and the inner wall 34 of the weldment 14.

[0066] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. A welding argon protection device, comprising a protective shell (1) with an open upper end, characterized in that An air inlet pipe (3) is provided on the protective shell (1), one side of the protective shell (1) is connected to one side of the connecting plate (4), and the other side of the connecting plate (4) is connected to one side of the cantilever plate (11). A wall thickness pull plate (9) and an adjustment support plate (12) are movably connected to the cantilever plate (11), and the wall thickness pull plate (9) and the adjustment support plate (12) are arranged in the transverse direction. The wall thickness pull plate (9) and the adjustment support plate (12) can move up and down, forward and backward relative to the cantilever plate (11) and can be locked in position; a hanging plate (15) is provided on the upper ends of the wall thickness pull plate (9) and the adjustment support plate (12), and the upper ends of the wall thickness pull plate (9) and the adjustment support plate (12) are placed in the horizontal strip groove (33) on the hanging plate (15).

2. A welding argon protection device according to claim 1, characterized in that A transverse partition (2) is provided in the middle of the protective shell (1), a through hole (16) is provided on the transverse partition (2), and an air intake pipe (3) is provided at the lower end of the protective shell (1).

3. A welding argon protection device according to claim 1, characterized in that The air inlet pipe (3) is arranged at the lower end of the protective shell, close to the connecting plate (4).

4. A welding argon protection device according to claim 2, characterized in that There are a plurality of through holes (16) uniformly distributed on the transverse partition (2).

5. A welding argon protection device according to claim 4, characterized in that The cross-sectional area of ​​a single through hole (16) is smaller than the cross-sectional area of ​​the inner diameter of the air intake pipe (3), and the total cross-sectional area of ​​the plurality of through holes (16) is not smaller than the cross-sectional area of ​​the inner diameter of the air intake pipe (3).

6. A welding argon protection device according to claim 1, characterized in that The lower end of the cantilever plate (11) is provided with a plurality of limit blocks (17) extending forward.

7. A welding argon protection device according to claim 6, characterized in that There are three limit blocks (17), one limit block (17) is set at the front end of the cantilever plate (11), one limit block (17) is set at the front of the cantilever plate (11), and one limit block (17) is set in the middle of the cantilever plate (11).

8. A welding argon protection device according to claim 1, characterized in that The upper end of the cantilever plate (11) has a support plate (18) extending upward and bending backward.

9. A welding argon protection device according to claim 1, characterized in that The connecting plate (4) is a transverse L-shaped plate, the short transverse plate of the transverse L-shaped plate is connected to the protective shell (1), the long transverse plate of the transverse L-shaped plate is provided with a first positioning pin hole on the upper outer side, and the long transverse plate of the transverse L-shaped plate is provided with an arc-shaped adjustment hole (5) on the lower outer side; A second positioning pin hole (19) is provided on the upper portion of the cantilever plate (11) close to the connecting plate (4) and corresponding to the first positioning pin hole, and a connecting hole (20) is provided on the lower portion of the cantilever plate (11) close to the connecting plate (4) and corresponding to the arc-shaped adjustment hole (5); The positioning pin shaft (7) passes through the first positioning pin hole and the second positioning pin hole (19); The bolt passes through the arc-shaped adjustment hole (5) and the connecting hole (20), and the curvature adjustment knob (6) is screwed onto the bolt.

10. A welding argon protection device according to claim 1, characterized in that A pull plate strip-shaped notch (21) is provided in the middle of the wall thickness pull plate (9) along the length of the wall thickness pull plate (9), a pull plate upper end head (24) is provided on the inner side of the upper end of the wall thickness pull plate (9), the outer side of the lower end of the pull plate upper end head (24) is connected to the inner upper end of the pull plate inclined surface (22), a pull plate limiting groove (23) is provided on the wall thickness pull plate (9) below the outer lower end of the pull plate inclined surface (22), and the pull plate limiting groove (23) is provided above the pull plate strip-shaped notch (21); a pull plate spring clamping groove (25) is provided on the wall thickness pull plate (9) on the inner side below the pull plate strip-shaped notch (21); The middle portion of the adjusting support plate (12) is provided with a support plate strip-shaped notch (28) along the length of the adjusting support plate (12); an upper end head (29) is provided on the inner side of the upper end of the adjusting support plate (12); the outer side of the lower end of the upper end head (29) is connected to the inner upper end of the support plate inclined surface (26); a support plate limiting groove (27) is provided on the adjusting support plate (12) below the outer lower end of the support plate inclined surface (26); the support plate limiting groove (27) is provided above the support plate strip-shaped notch (28); a support plate spring clamping groove (30) is provided on the adjusting support plate (12) on the inner side below the support plate strip-shaped notch (28); One end of the spring (10) is hooked in the pull plate spring slot (25), and the other end of the spring (10) is hooked in the support plate spring slot (30); The cantilever plate (11) is provided with a wall thickness adjustment threaded hole (31) and a positioning threaded hole (32) in the transverse direction. The wall thickness adjustment knob (13) is a bolt with a rotating handle on the bolt head, and the bolt passes through the support plate strip-shaped notch (28) and is screwed into the wall thickness adjustment threaded hole (31); The positioning knob (8) is a bolt with a rotating handle on the bolt head, and the bolt passes through the pull plate strip-shaped notch (21) and is screwed into the positioning threaded hole (32).

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