Thin-wall small-diameter corrugated pipe welding device

Abstract

The utility model provides a welding device for a thin-wall small-diameter corrugated pipe, which comprises a welding machine and a gas protection groove arranged in the corrugated pipe, and a plurality of height-adjustable bolt telescopic rods are fixedly arranged at the bottom of the gas protection groove, so that the back surface of a welding seam of the welding machine is protected by the gas protection groove. The welding seam forming device has the advantages that the height-adjustable gas protection groove is adopted, so that a welding seam can be always protected by protection gas, the problem of material burnthrough caused by overheating is effectively avoided, stable and uniform welding seam forming is achieved, the oxidation rate and the defect rate of the welding seam are remarkably reduced, and the welding seam forming quality is improved. The strength and the sealing performance of welding seams are improved.

Description

Technical Field

[0001] The utility model relates to the field of welding devices, in particular to a welding device for thin-walled small-diameter corrugated pipes. Background Art

[0002] The design and technical specifications of the bellows cylinder straight seam welding machines currently widely used in the market are mainly focused on handling larger-sized cylinder welding tasks. This limitation is particularly prominent in specific production scenarios, especially for bellows cylinders with a diameter of less than 150mm. Traditional straight seam welding machines are difficult to use directly, forcing manufacturers to turn to the more time-consuming and technology-intensive argon arc manual welding method.

[0003] However, using manual argon arc welding to weld these small bellows cylinders, especially when the cylinder thickness is only 1.2mm, there are multiple challenges. First, due to the extremely narrow weld area and thin material thickness, oxidation reactions are very likely to occur during the welding process, which not only affects the purity and strength of the weld, but may also cause quality defects such as cracks and pores, seriously damaging the overall performance of the welded joint. Secondly, overheating of the welding temperature can easily cause the material to burn through, which not only requires the welder to have a very high level of skill, but also requires constant vigilance to adjust the welding parameters to ensure welding quality and safety.

[0004] This series of problems not only significantly reduces the efficiency of welding operations and increases production costs, but is also directly related to the overall quality of expansion joint bellows products. As an indispensable and important component in industrial piping systems, the performance stability and service life of expansion joints are directly related to the safety and reliability of the entire system. Therefore, any defects in the quality of the weld may become a potential failure point, shorten the service life of the expansion joint bellows, and even cause more serious safety accidents. In view of this, it is particularly important to develop or improve special welding equipment suitable for such small-sized and thin-walled materials for bellows cylinders with a diameter of less than 150mm and a thickness of only 1.2mm. Utility Model Content

[0005] The utility model aims to provide a thin-walled small-diameter corrugated pipe welding device to solve the problem that the thin-walled small-diameter corrugated pipe mentioned above is very likely to undergo oxidation reaction during the welding process, which not only affects the purity and strength of the weld, but may also cause quality defects such as cracks and pores.

[0006] To achieve the above-mentioned purpose, the utility model provides a thin-walled small-diameter corrugated pipe welding device, including a welder and a gas protection tank arranged in the corrugated pipe, wherein a plurality of height-adjustable bolt telescopic rods are fixedly arranged at the bottom of the gas protection tank, so that the back of the weld of the welder is protected by the gas protection tank.

[0007] Furthermore, the bolt telescopic rod comprises a connecting rod and a screw rod. A nut is fixedly arranged on the bottom side of the connecting rod. The nut cooperates with the screw rod. The screw rod is rotated to adjust the length of the bolt telescopic rod.

[0008] As a preferred solution, the width of the gas protection groove is adapted to the size of the weld and the weld fusion zone.

[0009] Furthermore, a gas outlet pipe for protective gas is arranged at the front end of the gas protection tank.

[0010] Furthermore, an air inlet pipe for protective gas is arranged at the rear end of the gas protection tank.

[0011] As a preferred solution, the number of the bolt telescopic rods is 2 to 5.

[0012] As a preferred solution, the welding machine is a straight seam welding machine.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model adopts a gas protection groove with adjustable height, so that the weld is always under the protection of the protective gas, effectively avoiding the problem of material burn-through caused by overheating, achieving stable and uniform weld formation, significantly reducing the oxidation and defect rate of the weld, and improving the strength and sealing of the weld.

[0015] 2. The utility model adopts this thin-walled small-diameter special welding device, which can greatly reduce the rework and scrap caused by weld quality problems, saving production costs. At the same time, high-quality welds also improve the durability and reliability of the expansion joint bellows, extend its service life, and reduce the additional expenses caused by replacement and maintenance. It not only helps to improve the market competitiveness of enterprises, but also provides a strong guarantee for the safe and stable operation of the entire industrial pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0017] Figure 1 A schematic structural diagram of the utility model.

[0018] The reference numerals in the accompanying drawings are:

[0019] 1. Welding machine; 2. Gas protection tank; 21. Exhaust pipe; 22. Inlet pipe; 3. Bellows; 4. Bolt telescopic rod; 41. Connecting rod; 42. Screw rod; 43. Nut. DETAILED DESCRIPTION

[0020] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0021] Example:

[0022] See also Figure 1 The embodiment of the utility model provides a thin-walled small-diameter corrugated pipe welding device, including a welding machine and a gas protection tank 2 arranged in a corrugated pipe 3, and two height-adjustable bolt telescopic rods 4 are fixedly arranged at the bottom of the gas protection tank 2, so that the back of the weld of the welding machine 1 is protected by the gas protection tank 2.

[0023] Specifically, in this embodiment, the bolt telescopic rod 4 includes a connecting rod 41 and a screw rod 42. A nut 43 is fixedly arranged on the bottom side of the connecting rod 41. The nut 43 is used in conjunction with the screw rod 42. The screw rod 42 is rotated to adjust the length of the bolt telescopic rod 4, thereby adjusting the height of the gas protection groove 2, thereby realizing the welding of the longitudinal welds of thin-walled small-diameter corrugated pipes of different diameters.

[0024] It is worth noting that the width of the gas protection groove 2 described in this embodiment is adapted to the size of the weld and the weld fusion zone, so that the groove width can just cover the weld and the weld fusion zone, so that the back of the weld is in a gas protection environment.

[0025] In this embodiment, a protective gas outlet pipe 21 is provided at the front end of the gas protection tank 2, and a protective gas inlet pipe 22 is provided at the rear end of the gas protection tank 2, so as to realize continuous supply of protective gas and achieve gas protection.

[0026] In addition, the straight seam welder used in the welding machine 1 is used to weld thin-walled longitudinal butt welds. The above-mentioned gas protection device is used to achieve welding of thin-walled small-diameter corrugated pipes, replacing manual argon arc welding, improving welding quality, and improving welding efficiency.

[0027] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.

Claims

1. A thin-walled small-diameter corrugated pipe welding device, characterized in that: It comprises a welding machine (1) and a gas protection tank (2) arranged in a bellows (3), wherein a plurality of bolt telescopic rods (4) with adjustable heights are fixedly arranged at the bottom of the gas protection tank (2), so that the back of the weld of the welding machine (1) is protected by the gas protection tank (2).

2. The thin-walled small-diameter corrugated pipe welding device according to claim 1 is characterized in that: The bolt telescopic rod (4) comprises a connecting rod (41) and a screw rod (42). A nut (43) is fixedly arranged on the bottom side of the connecting rod (41). The nut (43) cooperates with the screw rod (42) to adjust the length of the bolt telescopic rod (4) by rotating the screw rod (42).

3. The thin-walled small-diameter corrugated pipe welding device according to claim 2 is characterized in that: The width of the gas protection groove (2) is adapted to the size of the weld and the weld fusion zone.

4. The thin-walled small-diameter corrugated pipe welding device according to claim 1, characterized in that: A protective gas outlet pipe (21) is provided at the front end of the gas protection tank (2).

5. The thin-walled small-diameter corrugated pipe welding device according to claim 1, characterized in that: An air inlet pipe (22) for protective gas is arranged at the rear end of the gas protection tank (2).

6. The thin-walled small-diameter corrugated pipe welding device according to claim 1, characterized in that: The number of the bolt telescopic rods (4) is 2 to 5.

7. The thin-walled small-diameter corrugated pipe welding device according to claim 1, characterized in that: The welding machine (1) is a straight seam welding machine.

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