Gas supply mechanism on welding gun

Abstract

The utility model discloses a gas supply mechanism on a welding gun, which belongs to the technical field of gas shielded welding machines and comprises an upper limiting plate, a lower limiting plate, a sliding plate, a bolt, a first gas pipe and a second gas pipe. The sliding plate is composed of two symmetrical half sliding plates. The periphery of each half sliding plate is composed of A, B, C, D, E, F, G and H line segments, the two sliding plates can firmly fix the positions of the air pipes no matter the two gun barrels are at any angle, the air pipes cannot shake, and protective gas sent out from the two branch air pipes can be sent to the electric arc position. The two branch air pipes are provided with water-cooled jackets, so that the connected air delivery hose is prevented from aging too early due to over-high temperature of the heads of the air pipes.

Description

Technical Field

[0001] The utility model relates to a welding torch for welding narrow groove welds, belonging to the technical field of gas shielded welding machines, and particularly relates to a gas supply mechanism for supplying shielding gas installed on the welding torch. Background Art

[0002] A utility model patent has been authorized (Application No.: 2023224722131, Invention Creation Name: A Welding Device for Narrow Grooves). The sliding plate in this patent has an oval hole, and an external gas supply pipe passes through the oval hole. During the implementation of this patent, it is found that when the angle of the external gas supply pipe changes, the major axis dimension of the oval hole of the sliding plate changes. The larger the angle of the external gas supply pipe, the longer the major axis. When the angle becomes smaller again, there will be a gap between the oval hole with the already lengthened major axis and the external gas supply pipe. After the external gas supply pipe is locked with the upper limit plate or the lower limit plate using this sliding plate, due to the gap, it will still shake left and right. A slight shake of the external gas supply pipe at the upper limit plate or the lower limit plate will cause a large shake at the lower end of the external gas supply pipe, causing the shielding gas sent out by the gas pipe to deviate from the arc, affecting the gas shielding effect and generating defects such as pores. Moreover, "spatter" will also cause a short circuit between the external gas supply pipe and the welding torch contact tip, burning out the external gas supply pipe and the contact tip.

[0003] In view of the above problems, a gas supply mechanism for a narrow groove welding torch is designed. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a gas supply mechanism on a welding torch. No matter what angle the two gun barrels are, the two sliding plates can firmly fix the position of the gas pipe without shaking, and the shielding gas sent out from the two bronchial tubes can be sent to the arc.

[0005] The technical solution of the utility model is: a gas supply mechanism on a welding torch, including an upper limit plate, a lower limit plate, a sliding plate, a bolt, a first gas pipe, and a second gas pipe. The sliding plate is composed of two symmetrical half-sliding plates.

[0006] Further, the periphery of the half skateboard (11) is composed of line segments A, B, C, D, E, F, G, and H. Among them, sides A and B are the upper and lower sides of the skateboard, C is one side, the arc head of side C is connected to the ends of sides A and B, and the middle of side C is perpendicular to sides A and B. Line segments D and E are the other sides of sides A and B. The upper end of side D is connected to the other end of side A, and the lower end is connected to an inclined side F. The lower end of side E is connected to the other end of side B, and the upper end is connected to an inclined side G. The ends of the inclined sides F and G are connected to a vertical side H. There is a point on each of the two sides F and G in contact with the air pipe, and the contact points are point f and point g respectively. When the two half skateboards are symmetrically placed on both sides of each air pipe around the first air pipe or when the two half skateboards are symmetrically placed on both sides of each air pipe around the second air pipe, and the f and g points of the four half skateboards are respectively in contact with the first air pipe and the second air pipe, there should be a gap between the D and E sides of every two skateboards, and there is a through hole J and a through hole K respectively below side A and above side B.

[0007] Further, the upper limit plate is a concave long plate. The width between the two concave sides is the same as the length of the skateboard. The skateboard can slide in the groove. There are a total of 4 first long holes A at the positions corresponding to the through holes J and K of the skateboard. There is a central hole in the center of the upper limit plate, and there is a second long hole A on each side of the central hole.

[0008] Further, the lower limit plate is a concave long plate. The width between the two concave sides is the same as the length of the skateboard. The skateboard can slide in the groove. There are a total of 4 first long holes B at the positions corresponding to the through holes J and K of the skateboard. There is a central hole in the center of the lower limit plate, and there is a second long hole B on each side of the central hole. Below the central hole B of the lower limit plate, the lower limit plate is locally concave.

[0009] Further, a spacer column is installed between the upper limit plate and the lower limit plate. The spacer column bolts are successively passed through the holes of the upper limit plate, the holes in the middle of the spacer column, and the holes of the lower limit and locked with nuts. The first air pipe and the second air pipe are respectively passed through the second long hole A of the upper limit plate and the second long hole B of the lower limit plate in sequence. The bolts are respectively passed through the J holes and K holes of the two symmetrically placed skateboards, and then respectively passed through the first long hole A of the upper limit plate and the first long hole B of the lower limit plate, connecting the skateboard to the upper limit plate and connecting the skateboard to the lower limit plate respectively.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1) Two skateboards composed of line segments A, B, C, D, E, F, G, and H clamp the externally added air pipe from two directions. No matter how the angle of the externally added air pipe changes, the externally added air pipe can be firmly fixed and will not shake.

[0012] 2) The upper limit plate and the lower limit plate are both provided with a first long hole and a second long hole, which can more conveniently change the position of the externally added gas supply pipe, so that the shielding gas sent out is aligned with the arc and no pores will be generated.

[0013] 3) The diameter of the externally added gas supply pipe passing through the upper limit plate and the lower limit plate is thinner, which can make the widths of the upper limit plate and the lower limit plate narrower, so that there will be no collision between the gun rods of the gas supply mechanism and between each part such as the gun rod and the externally added gas supply pipe.

[0014] 4) The diameter of the externally added gas supply pipe outside the upper limit plate and the lower limit plate is thicker, which can increase the coverage area of the shielding gas and enhance the shielding effect. Moreover, the lower port of the gas pipe is thicker and is not easily blocked by spatter.

[0015] 5) When welding, the temperature of the thick externally added gas supply pipe is above 500 degrees, which easily causes the rubber hoses connected to the inlet pipe and the outlet pipe to overheat and accelerate aging. After adding a water cooling jacket for water cooling, the rubber hoses will not overheat.

[0016] 6) The bolts use external hexagonal screws, and the screw heads are below the upper limit plate or the lower limit plate. Even if spatter accumulates on the screw heads, the screws can still be conveniently tightened and loosened with an external hexagonal wrench, and the spatter will not stick to the threads. If the spatter sticks to the threads, the nut will not be able to be unscrewed. Description of the Drawings

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 Schematic diagram of a gas supply mechanism on a welding torch;

[0019] Figure 2 Top view of the upper limit plate;

[0020] Figure 3 Side view of the upper limit plate;

[0021] Figure 4 Top view of the lower limit plate;

[0022] Figure 5 Side view of the lower limit plate;

[0023] Figure 6 Drawing of the skateboard part;

[0024] Figure 7 Installation diagram of the skateboard position;

[0025] Figure 8 Front view of the water cooling jacket;

[0026] Figure 9 Top view of the water cooling jacket;

[0027] In the figure: 1 - Side A; 2 - Side B; 3 - Side C; 4 - Side D; 5 - Side E; 6 - Side F; 7 - Side G; 8 - Side H; 9 - Upper limit plate; 10 - Lower limit plate; 11 - Slide plate; 12 - Bolt; 13 - First air pipe; 14 - Second air pipe; 15 - Through hole J; 16 - Through hole K; 17 - Central hole; 18 - Insulating sleeve; 19 - First long hole A; 20 - First long hole B; 21 - Second long hole A; 22 - Second long hole B; 24 - Water cooling sleeve; 25 - Water inlet pipe; 26 - Water outlet pipe; 27 - Gun rod; 28 - Nut; 29 - Spacer column; 30 - Point f; 31 - Point g; 32 - Point h. Detailed implementation mode

[0028] Next, the technical solution of the present utility model will be clearly and completely described through specific implementation modes.

[0029] As Figure 1 shown, a gas supply mechanism on a welding torch of the present utility model includes an upper limit plate 9, a lower limit plate 10, a slide plate 11, a bolt 12, a first air pipe 13 and a second air pipe 14.

[0030] In this embodiment, the periphery of the slide plate 11 is composed of side A 1, side B 2, side C 3, side D 4, side E 5, side F 6, side G 7 and side H 8 (as Figure 6 shown), wherein sides A and B are the upper and lower sides of the slide plate, C is a side, the arc head of side C is connected to the ends of sides A and B, and the middle of side C is perpendicular to sides A and B. D and E are the other sides of sides A and B. The upper end of side D is connected to the other end of side A, and the lower end is connected to an inclined side F. The lower end of side E is connected to the other end of side B, and the upper end is connected to an inclined side G. The ends of the inclined sides F and G are connected to a vertical side H. There is a point on each of the three sides F, G and H in contact with the air pipe, and the contact points are point f 30, point g 31 and point h 32 respectively.

[0031] As Figure 7 shown, when two slide plates 11 are symmetrically placed on both sides of each air pipe around the first air pipe 13 or when two slide plates 11 are symmetrically placed on both sides of each air pipe around the second air pipe 14, and the f, g and h points of the four slide plates 11 are respectively in contact with the first air pipe 13 and the second air pipe 14, in order to prevent the D and E sides of every two slide plates 11 from colliding, there is a through hole J 15 and a through hole K 16 respectively below side A and above side B.

[0032] As Figure 2 and 3 shown, the upper limit plate 9 of this embodiment is a concave long plate, and the width between the two concave sides is the same as the length of the slide plate. The slide plate can slide in the groove. There are a total of 4 first long holes A 19 at the positions corresponding to the through holes J 15 and K 16 of the slide plate. There is a central hole 17 in the central part of the upper limit plate 9, and there is a second long hole A 21 on each side of the central hole 17.

[0033] As Figure 4 and 5 shown, the lower limit plate 10 of this embodiment is a concave long plate, and the width between the two concave edges is the same as the length of the slide plate. The slide plate can slide in the groove. At the positions corresponding to the through holes J15 and K16 of the slide plate, there are a total of 4 first long holes B20. There is a central hole 17 in the center of the lower limit plate 10, and there is a second long hole B22 on each side of the central hole 17.

[0034] In the present utility model, spacer columns 29 are installed between the upper limit plate 9 and the lower limit plate 10, and the spacer columns 29 are located at both ends of the upper limit plate 9 and the lower limit plate 10. The spacer bolts 33 are sequentially passed through the holes on the upper limit plate 9, the holes in the middle of the spacer columns 33, and the holes on the lower limit plate 10 and locked with nuts to connect the upper limit plate and the lower limit plate together. The first air pipe 13 and the second air pipe 14 are respectively sequentially passed through the second long holes A21 of the upper limit plate 9 and the second long holes B22 of the lower limit plate 10. The slide plate 11 on both sides of the first air pipe 13 and the second air pipe 14 is fixed by bolts 12, so that the slide plate 11 is connected to the upper limit plate 9, or the slide plate 11 is connected to the lower limit plate 10. When the bolts 12 are fixed, the bolts 12 respectively pass through the J holes 15 and K holes 16 of the two symmetrically placed slide plates 11, and then respectively pass through the first long holes A19 of the upper limit plate 9 or the first long holes B20 of the lower limit plate 10, and connect the slide plate 11 to the upper limit plate 9 respectively, and connect the slide plate 11 to the lower limit plate 10. Before connection, it is necessary to make sure that the f, g, and h points of each slide plate 11 are respectively in contact with the first air pipe 13 and the second air pipe 14, and at the same time make sure that the protective gas sent out by the first air pipe 13 and the second air pipe 14 can reach the arc.

[0035] In this embodiment, the bolts 12 and the spacer bolts 33 are external hexagonal bolts, and the screw heads are respectively on the lower side of the lower limit plate 10 or the lower side of the upper limit plate 9, and the nuts are respectively on the upper side of the slide plate 11, so that the spatter will not stick to the threads. If the spatter sticks to the threads, the nuts cannot be unscrewed.

[0036] The gun barrel 27 of the welding torch passes through the central hole 17 of the upper limit plate 9 and the lower limit plate 10. The insulating sleeve 18 is installed on the upper surface of the upper limit plate, and the nut 28 is installed on the lower surface of the upper limit plate. The nut is screwed into the thread at the lower end of the insulating sleeve to install the gun barrel and the upper limit plate together.

[0037] The first air pipe 13 and the second air pipe 14 are composed of two sections of copper pipes. The thinner section passes through the second long holes of the upper limit plate and the lower limit plate and is connected to the flexible air pipe 23, and the thicker section is located below the lower limit plate.

[0038] As Figure 8 and 9As shown, a thicker section of the first air pipe 13 and the second air pipe 14 is equipped with a water-cooling jacket 24. The water-cooling jacket is made of the same material as the air pipe, such as Figure 1 As shown, the water-cooling jacket is installed on the side where the two air pipes are far from each other. At the farthest ends of the two water-cooling jackets, a water inlet pipe 25 and a water outlet pipe 26 are respectively installed at the upper and lower positions. The water inlet pipe 25 and the water outlet pipe 26 are bent upward so that their ends are far from the electric arc. The width of the water-cooling jacket, the water inlet pipe, and the water outlet pipe is equal to or less than the width of the air pipe connected to them. And the center lines of the two air pipes and the water-cooling jackets, the water inlet pipes, and the water outlet pipes connected to them are in one plane. Such an arrangement makes the additional air delivery pipes on the welding torch, including the water-cooling jacket, the water inlet pipe, and the water outlet pipe, have a width equal to or less than the width of the thicker air pipe, and the whole can be placed into a narrow groove.

[0039] The thinner section and the thicker section of the air pipe 13 and the air pipe 14, between the thicker section of the air pipe and the water-cooling jacket 24, and between the water-cooling jacket and the water inlet pipe 25 and the water outlet pipe 26 are all connected by welding.

[0040] The water inlet pipe 25 of the water-cooling jacket 24 of the first air pipe 13 is connected to the water outlet of the water tank through a hose. The water outlet pipe 26 of the water-cooling jacket 24 of the first air pipe is connected to the water inlet pipe 25 of the water-cooling jacket 24 of the second air pipe 14 through a hose. The water outlet pipe 26 of the water-cooling jacket 24 of the second air pipe 14 is connected to the water return port of the water tank through a hose.

[0041] The above is only a preferred embodiment of the present invention and is not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention. For example, without creative labor, the shape of the slide plate 11 can be designed into various shapes such as a crescent shape or an arc shape, and various shapes can clamp the air pipe. Such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. An air supply mechanism on a welding torch, comprising an upper limit plate (9), a lower limit plate (10), a sliding plate (11), a bolt (12), a first air pipe (13) and a second air pipe (14), characterized in that: The skateboard is composed of two symmetrical half skateboards (11).

2. The air supply mechanism on a welding torch according to claim 1, wherein: The periphery of the half skateboard (11) consists of line segments A, B, C, D, E, F, G, and H. Among them, sides A and B are the upper and lower sides of the skateboard, C is one side, the arc head of side C is connected to the ends of sides A and B, and the middle of side C is perpendicular to sides A and B. Line segments D and E are the other sides of sides A and B. The upper end of side D is connected to the other end of side A, and the lower end is connected to an inclined side F. The lower end of side E is connected to the other end of side B, and the upper end is connected to an inclined side G. The ends of the inclined sides F and G are connected to a vertical side H. There is a point on each of the two sides F and G in contact with the air pipe, and the contact points are point f and point g respectively. When the two half skateboards (11) are symmetrically placed on both sides of each air pipe around the first air pipe (13) or when the two half skateboards (11) are symmetrically placed on both sides of each air pipe around the second air pipe (14), and the f and g points of the four half skateboards (11) are respectively in contact with the first air pipe (13) and the second air pipe (14), there should be a gap between the D and E sides of every two skateboards (11), and there is a through hole J (15) and a through hole K (16) respectively below side A and above side B.

3. The air supply mechanism on a welding torch according to claim 1, characterized in that: The upper limit plate (9) is a concave long plate. The width between the two concave sides is the same as the length of the skateboard. The skateboard can slide in the groove. There are a total of 4 first long holes A (19) at the positions corresponding to the through holes J and K of the skateboard. There is a central hole (17) in the central part of the upper limit plate (9), and there is a second long hole A (21) on each side of the central hole.

4. The air supply mechanism on a welding torch according to claim 1, characterized in that: The lower limit plate (10) is a concave long plate. The width between the two concave sides is the same as the length of the skateboard. The skateboard can slide in the groove. There are a total of 4 first long holes B (20) at the positions corresponding to the through holes J and K of the skateboard. There is a central hole in the central part of the lower limit plate (10). There is a second long hole B (22) on each side of the central hole. Below the central hole B of the lower limit plate (10), the lower limit plate is partially concave.

5. The air supply mechanism on a welding torch according to claim 1, characterized in that: A spacer column (29) is installed between the upper limit plate (9) and the lower limit plate (10). The spacer column bolt (33) passes through the holes of the upper limit plate, the middle hole of the spacer column (29), and the holes of the lower limit in sequence and is locked with nuts. The first air pipe (13) and the second air pipe (14) pass through the second long hole A (21) of the upper limit plate (9) and the second long hole B (22) of the lower limit plate (10) respectively. Bolts (12) pass through the J holes (15) and K holes (16) of the two symmetrically placed skateboards (11) respectively, and then pass through the first long hole A (19) of the upper limit plate (9) and the first long hole B (20) of the lower limit plate (10) respectively, connecting the skateboard (11) to the upper limit plate (9) and connecting the skateboard (11) to the lower limit plate (10) respectively.

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