Gas protection tool for deep hole welding of heat exchange tube

Abstract

The utility model discloses a gas protection tool for deep hole welding of a heat exchange tube, which comprises a left semicircular tube, a right semicircular tube is arranged on one side of the left semicircular tube, the left semicircular tube is connected with the right semicircular tube through a hinge, a bolt is arranged on the left semicircular tube, a fixed threaded hole and a vent hole are formed in the right semicircular tube, and the left semicircular tube is connected with the right semicircular tube through a hinge. A fixing bolt is in threaded connection with the fixing threaded hole, the vent hole is in threaded connection with a vent pipe, the left semicircular pipe and the right semicircular pipe are folded to form a circular pipe, and the inner part of the circular pipe is divided into an upper fixing part and a lower ventilation part; the diffusion direction and the diffusion area of inert gas are limited through the circular pipe formed by the left semicircular pipe and the right semicircular pipe, so that the inert gas is diffused around a welding seam, and protection of the inert gas on the welding seam is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding technical field, concretely is a kind of gas protection tool for heat exchange pipe deep hole welding. BACKGROUND

[0002] Deep hole welding is a kind of welding technology, it carries out welding by introducing arc into welding hole inside, commonly used for the butt welding of heat exchange pipe and tube sheet, and deep hole welding needs to use inert gas to protect.

[0003] The existing deep hole welding when operating, inert gas is transported along gas pipe, and only stays around weld temporarily to diffuse to all directions, which leads to the protection effect of inert gas on deep hole welding is reduced, and inert gas cannot be used efficiently. SUMMARY

[0004] The utility model discloses a kind of gas protection tool for heat exchange pipe deep hole welding, to solve the problem raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of gas protection tool for heat exchange pipe deep hole welding, including left half circle pipe, the left half circle pipe one side is equipped with right half circle pipe, the left half circle pipe is connected right half circle pipe by hinge, the left half circle pipe is equipped with bolt, the right half circle pipe is equipped with fixed screw hole and air hole, the fixed screw hole is connected fixed bolt with screw thread, the air hole is connected air pipe with screw thread, the left half circle pipe and right half circle pipe are folded to form circular pipe, the circular pipe inner portion is divided into upper fixed part and lower air passage part.

[0006] Preferably, the diameter of the upper fixed part is consistent with the outer diameter of the heat exchange pipe, and the diameter of the lower air passage part is greater than the diameter of the upper fixed part.

[0007] Preferably, the outer surface of the lower air passage part is provided with a clamping structure.

[0008] Preferably, the bolt penetrates one side of the left half circle pipe and the right half circle pipe.

[0009] Compared with the prior art, the utility model has the beneficial effects that: the circular pipe formed by the left half circle pipe and the right half circle pipe limits the diffusion direction and diffusion area of the inert gas, so that the inert gas diffuses around the weld, improving the protection of the inert gas on the weld. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the overall structure schematic view of the utility model;

[0011] Figure 2 It is the right half circle pipe structure schematic view of the utility model;

[0012] Figure 3 It is the upper fixed part and the lower air passage part position schematic view of the left half pipe of the utility model.

[0013] In the drawing: 1, left half pipe; 2, right half pipe; 3, hinge; 4, bolt; 5, fixed screw hole; 6, air hole; 7, fixed bolt; 8, air pipe; 9, lower air passage part; 10, upper fixed part. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0015] Please refer to 1-3, one embodiment provided by the utility model: a kind of gas protection tool for heat exchange pipe deep hole welding, including left half pipe 1, left half pipe 1 side is equipped with right half pipe 2, left half pipe 1 is connected right half pipe 2 by hinge 3, left half pipe 1 is equipped with bolt 4, right half pipe 2 is equipped with fixed screw hole 5 and air hole 6, fixed screw hole 5 is threadedly connected fixed bolt 7, air hole 6 is threadedly connected air pipe 8, left half pipe 1 and right half pipe 2 are folded to form pipe, pipe inner part is upper fixed part 10 and lower air passage part 9, using pipe buckling in heat exchange pipe outer wall, so that upper fixed part 10 is in contact with heat exchange pipe outer wall, inert gas enters lower air passage part 9 from air pipe 8, when deep hole welding is carried out, inert gas diffuses in lower air passage part 9, so that weld is always in inert gas diffusion range, and weld is perfectly protected.

[0016] The diameter of upper fixed part 10 is consistent with the outer diameter of heat exchange pipe, the diameter of lower air passage part 9 is greater than the diameter of upper fixed part 10, using upper fixed part 10 to contact heat exchange pipe, to fix heat exchange pipe, lower air passage part 9 has gap, so that inert gas can flow, to realize the protection of weld; the outer surface of lower air passage part 9 is equipped with clamping structure, clamping structure is that the outer diameter of lower position of pipe outer surface is less than the upper diameter of pipe outer surface, to facilitate the close contact of tool with pipe plate; bolt 4 penetrates one side of left half pipe 1 and right half pipe 2, using bolt 4 to realize the fixation of left half pipe 1 and right half pipe 2.

[0017] Working principle: in use, the tool is first buckled on the outer wall of the heat exchange pipe, so that the upper fixing part 10 is in contact with the outer wall of the heat exchange pipe, the left half pipe 1 and the right half pipe 2 are folded by using the latch 4, the fixing bolt 7 is screwed through the fixing threaded hole 5, the position of the pipe on the outer wall of the heat exchange pipe is fixed, at this time, the clamping structure is tightly attached to the pipe plate, the inert gas is delivered from the air pipe 8 to the lower air part 9, at this time, the weld is welded, and the inert gas always protects the weld during the welding process, thereby improving the welding quality.

Claims

1. A gas protection tool for deep hole welding of heat exchange tubes, comprising a left half circular tube (1), characterized in that: The left half circular pipe (1) is provided with a right half circular pipe (2) on one side, the left half circular pipe (1) is connected with the right half circular pipe (2) through a hinge (3), the left half circular pipe (1) is provided with a bolt (4), the right half circular pipe (2) is provided with a fixed threaded hole (5) and a vent hole (6), the fixed threaded hole (5) is threadedly connected with a fixed bolt (7), the vent hole (6) is threadedly connected with a vent pipe (8), the left half circular pipe (1) and the right half circular pipe (2) are folded to form a circular pipe, and the circular pipe is divided into an upper fixed part (10) and a lower vent part (9).

2. The gas protection tooling for deep hole welding of heat exchange tubes according to claim 1, characterized in that: The diameter of the upper fixed part (10) is consistent with the outer diameter of the heat exchange pipe, and the diameter of the lower vent part (9) is greater than that of the upper fixed part (10).

3. The gas protection tooling for deep hole welding of heat exchange tubes according to claim 1, characterized in that: The outer surface of the lower vent part (9) is provided with a clamping structure.

4. The gas protection tooling for deep hole welding of heat exchange tubes according to claim 1, characterized in that: The bolt (4) penetrates one side of the left half circular pipe (1) and the right half circular pipe (2).

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