Weld joint oxidation prevention device for high-precision stainless steel pipe welding machine

Abstract

The utility model relates to the technical field of stainless steel pipe welding machines, in particular to a welding seam oxidation prevention device of a high-precision stainless steel pipe welding machine. According to the technical scheme, the device comprises an anti-oxidation cover and a transverse plate, the anti-oxidation cover is fixedly installed in the middle of the lower surface of the transverse plate, an argon pipe is fixedly connected to one side of the upper surface of the anti-oxidation cover, a gas outlet is formed in the side, away from the argon pipe, of the outer surface of the anti-oxidation cover, and a groove is formed in the lower surface of the anti-oxidation cover; a sealing strip is arranged in the groove, and a water inlet pipe and a water outlet pipe are fixedly connected to the side, close to the air outlet, of the outer surface of the anti-oxidation cover. The welding seam is always covered by argon, an anti-oxidation air curtain formed by the argon cannot deviate, so that the anti-oxidation effect is improved, meanwhile, the anti-oxidation protection effect on the welding seam in the cooling process after welding is achieved, and the welding seam is prevented from being blackened due to oxidation in the cooling process.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel pipe welding machines, in particular to a high-precision stainless steel pipe welding machine weld seam oxidation prevention device. Background Art

[0002] Stainless steel welded pipe refers to a steel pipe made by welding steel or steel strip after curling and forming through a machine unit and a mold. The welding process of stainless steel welded pipe requires the use of a stainless steel pipe welding machine, which mostly adopts argon arc welding. During the welding process, argon gas is blown into the weld to prevent the weld from being oxidized by contact with the air.

[0003] At present, stainless steel pipe welding machines usually adopt the method of blowing argon directly into the weld to play an anti-oxidation role. However, during the movement of the welding head, the anti-oxidation argon gas curtain formed on the weld will be offset, reducing the anti-oxidation effect. For this reason, we propose a high-precision stainless steel pipe welding machine weld anti-oxidation device. Utility Model Content

[0004] The utility model aims to provide a high-precision stainless steel pipe welding machine weld seam oxidation prevention device, which has the advantages that the weld seam is always covered by argon gas, and the anti-oxidation gas curtain formed by the argon gas will not deviate, so as to improve the anti-oxidation effect, and at the same time, it plays an anti-oxidation protection role for the weld seam in the cooling process after welding, and prevents the weld seam from becoming black due to oxidation in the cooling process. The utility model solves the problem that the current stainless steel pipe welding machine usually adopts the method of directly blowing argon gas to the weld seam to play an anti-oxidation role, but in the process of moving the welding head, the anti-oxidation argon gas curtain formed on the weld seam will deviate, thereby reducing the anti-oxidation effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision stainless steel pipe welding machine weld seam anti-oxidation device, comprising an anti-oxidation cover and a horizontal plate, an anti-oxidation cover is fixedly installed at the middle position of the lower surface of the horizontal plate, an argon gas pipe is fixedly connected to one side of the upper surface of the anti-oxidation cover, an air outlet is provided on the side of the outer surface of the anti-oxidation cover away from the argon gas pipe, a groove is provided on the lower surface of the anti-oxidation cover, a sealing strip is provided inside the groove, and a water inlet pipe and a water outlet pipe are fixedly connected to the side of the outer surface of the anti-oxidation cover close to the air outlet.

[0006] Preferably, a through hole is provided on the upper surface of the anti-oxidation cover near the argon gas pipe.

[0007] Preferably, a dovetail groove is provided on the lower surface of the transverse plate, a bidirectional screw is rotatably installed inside the dovetail groove, dovetail sliders are slidably sleeved on the outer surface of the bidirectional screw near the two end positions, telescopic rods are fixedly connected to the lower surfaces of the two dovetail sliders, fixed rods are fixedly connected to the ends of the two telescopic rods, and guide rollers are rotatably installed on the opposite sides of the two fixed rods near the two end positions.

[0008] Preferably, the outer surfaces of the four guide rollers are all provided with arc-shaped concave surfaces.

[0009] Preferably, the thread on the inner wall of the dovetail slider is meshed with the thread on the outer surface of the bidirectional lead screw.

[0010] Preferably, one end of the bidirectional screw rod located outside the cross plate is fixedly connected to a handwheel.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model provides an anti-oxidation cover, an argon gas pipe, an air outlet, a groove, a sealing strip, a water inlet pipe and a water outlet pipe, so that when the welding head moves to weld the stainless steel welded pipe, the weld is always covered by argon gas, and the anti-oxidation gas curtain formed by the argon gas will not deviate, so as to improve the anti-oxidation effect, and at the same time, it plays an anti-oxidation protection role for the weld in the cooling process after welding, and prevents the weld from blackening due to oxidation during the cooling process. The welding head is fixed inside the anti-oxidation cover, and the anti-oxidation cover spans above the stainless steel weld. The water inlet pipe inputs cooling water and enters the groove, exerting pressure on the sealing strip inside the groove, so that the sealing strip contacts the outer surface of the stainless steel welded pipe, and the flowing cooling water takes away the heat of the sealing strip and flows out from the water outlet pipe, and the argon gas enters the anti-oxidation cover from the argon gas pipe and is discharged from the air outlet, so that an argon anti-oxidation protection space is formed inside the anti-oxidation cover, which is not affected by the movement of the anti-oxidation cover and the welding head, and it also plays an anti-oxidation role in the cooling process of the weld.

[0013] 2. The utility model achieves the effect of facilitating the positioning and movement of the anti-oxidation cover by arranging a horizontal plate, a dovetail slide groove, a dovetail slider bidirectional screw, a telescopic rod, a guide roller and an arc-shaped concave surface. The bidirectional screw rotates and drives the two dovetail sliders to move toward each other. The length of the telescopic rod is adjusted so that the guide rollers under the two telescopic rods clamp the front and rear surfaces of the stainless steel welded pipe, and the outer surface of the stainless steel pipe contacts the arc-shaped concave surface. Then, the anti-oxidation cover can be positioned and moved along the stainless steel pipe to improve the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0015] Figure 2It is a partial three-dimensional schematic diagram of the anti-oxidation cover of the utility model;

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 4 It is a partial three-dimensional schematic diagram of the horizontal plate of the utility model.

[0018] Figure numerals: 1. hand wheel; 2. argon gas tube; 3. anti-oxidation cover; 4. horizontal plate; 5. telescopic rod; 6. fixed rod; 7. guide roller; 8. arc-shaped concave surface; 9. sealing strip; 10. water inlet pipe; 11. air outlet; 12. water outlet pipe; 13. groove; 14. through-hole; 15. dovetail slide groove; 16. bidirectional screw rod; 17. dovetail slider. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Embodiment 1

[0021] like Figures 1 - 3 As shown, the utility model proposes a high-precision stainless steel pipe welding machine weld seam oxidation prevention device, including an anti-oxidation cover 3 and a horizontal plate 4, the anti-oxidation cover 3 is fixedly installed at the middle position of the lower surface of the horizontal plate 4, the anti-oxidation cover 3 is hollow inside and opened at the bottom, one side of the upper surface of the anti-oxidation cover 3 is fixedly connected to an argon gas tube 2, a through hole 14 is provided on the upper surface of the anti-oxidation cover 3 near the argon gas tube 2, the welding head is fixed inside the anti-oxidation cover 3 through the through hole 14, an air outlet 11 is provided on the outer surface of the anti-oxidation cover 3 away from the argon gas tube 2, a groove 13 is provided on the lower surface of the anti-oxidation cover 3, a sealing strip 9 is provided inside the groove 13, and a water inlet pipe 10 and a water outlet pipe 12 are fixedly connected to the side of the outer surface of the anti-oxidation cover 3 near the air outlet 11.

[0022] When the utility model is in use, the welding head passes through the through hole 14 and is fixed inside the anti-oxidation cover 3, and the anti-oxidation cover 3 spans above the stainless steel weld, and the water inlet pipe 10 inputs cooling water and enters into the groove 13, causing pressure on the sealing strip 9 inside the groove 13, so that the sealing strip 9 is in contact with the outer surface of the stainless steel pipe weld pipe, and the flowing cooling water takes away the heat of the sealing strip 9 and then flows out from the water outlet pipe 12, and argon gas enters into the anti-oxidation cover 3 from the argon gas pipe 2 and is discharged from the gas outlet 11, so that an argon anti-oxidation protection space is formed inside the anti-oxidation cover 3, which is not affected by the movement of the anti-oxidation cover 3 and the welding head, and also plays an anti-oxidation role in the process of welding seam cooling.

[0023] Embodiment 2

[0024] like Figure 1 , Figure 3 and Figure 4As shown in the figure, a device for preventing weld oxidation of a high-precision stainless steel welding pipe machine proposed by the present utility model. Compared with the first embodiment, this embodiment further includes that a dovetail chute 15 is provided on the lower surface of the cross plate 4. A bidirectional lead screw 16 is rotatably installed inside the dovetail chute 15. Dovetail sliders 17 are slidably sleeved on the outer surface of the bidirectional lead screw 16 near both ends. The threads on the inner walls of the dovetail sliders 17 are engaged with the threads on the outer surface of the bidirectional lead screw 16. When the bidirectional lead screw 16 rotates, it can drive the two dovetail sliders 17 to move towards or away from each other. Fixed rods 6 are fixedly connected to the lower surfaces of the two dovetail sliders 17. Guide rollers 7 are rotatably installed near both ends on the opposite sides of the two fixed rods 6. Arc-shaped concave surfaces 8 are provided on the outer surfaces of the four guide rollers 7. One end of the bidirectional lead screw 16 located outside the cross plate 4 is fixedly connected to a hand wheel 1.

[0025] In this embodiment, the bidirectional lead screw 16 rotates and drives the two dovetail sliders 17 to move towards each other to adjust the length of the telescopic rods 5, so that the guide rollers 7 below the two telescopic rods 5 clamp the front and rear surfaces of the stainless steel welding pipe, and the outer surface of the stainless steel pipe contacts the arc-shaped concave surface 8. Then, the anti-oxidation cover 3 can be positioned and moved along the stainless steel pipe to improve the welding precision.

[0026] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A device for preventing weld oxidation of a high-precision stainless steel pipe welding machine, comprising an anti-oxidation cover (3) and a transverse plate (4), characterized in that: An anti-oxidation cover (3) is fixedly installed at the middle position of the lower surface of the horizontal plate (4); an argon gas pipe (2) is fixedly connected to one side of the upper surface of the anti-oxidation cover (3); an air outlet (11) is arranged on the side of the outer surface of the anti-oxidation cover (3) facing away from the argon gas pipe (2); a groove (13) is arranged on the lower surface of the anti-oxidation cover (3); a sealing strip (9) is arranged inside the groove (13); and a water inlet pipe (10) and a water outlet pipe (12) are fixedly connected to the side of the outer surface of the anti-oxidation cover (3) close to the air outlet (11).

2. The device for preventing weld oxidation of a high-precision stainless steel pipe welding machine according to claim 1 is characterized in that: A through opening (14) is provided on the upper surface of the anti-oxidation cover (3) near the argon gas pipe (2).

3. The device for preventing weld oxidation of a high-precision stainless steel pipe welding machine according to claim 1 is characterized in that: The lower surface of the transverse plate (4) is provided with a dovetail slide groove (15), a bidirectional screw rod (16) is rotatably mounted inside the dovetail slide groove (15), the outer surface of the bidirectional screw rod (16) is slidably sleeved with a dovetail slider (17) near the two ends, the lower surfaces of the two dovetail sliders (17) are fixedly connected with a telescopic rod (5), the ends of the two telescopic rods (5) are fixedly connected with a fixed rod (6), and the opposite sides of the two fixed rods (6) are rotatably mounted with guide rollers (7) near the two ends.

4. The device for preventing weld oxidation of a high-precision stainless steel pipe welding machine according to claim 3 is characterized in that: The outer surfaces of the four guide rollers (7) are all provided with arc-shaped concave surfaces (8).

5. The device for preventing weld oxidation of a high-precision stainless steel pipe welding machine according to claim 3 is characterized in that: The thread on the inner wall of the dovetail slider (17) is meshed with the thread on the outer surface of the bidirectional screw rod (16).

6. The device for preventing weld oxidation of a high-precision stainless steel pipe welding machine according to claim 3 is characterized in that: One end of the bidirectional screw rod (16) located outside the transverse plate (4) is fixedly connected to a hand wheel (1).

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