Gas protection device for back face of welding line

A gas protection device, the technology on the back, applied in the direction of providing/removing the protection gas device, welding accessories, etc., can solve the problems of poor sealing effect and gas protection effect, achieve good gas protection effect, convenient and quick assembly and disassembly, The effect of simple structure

Inactive Publication Date: 2016-12-14
SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In the field of nuclear power or chemical containers, when the outer groove of the circular seam of parts is automatically welded with gas protection, the inner wall of the circular seam is generally protected by gas on the back. In general, the inner wall of the circ

Method used

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  • Gas protection device for back face of welding line
  • Gas protection device for back face of welding line
  • Gas protection device for back face of welding line

Examples

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Example Embodiment

[0037] like figure 1 As shown, the gas protection device for the back side of the weld according to the present invention includes a symmetrical first half-ring assembly 10 and a second half-ring assembly 20, and four first bolts 30 connecting the two.

[0038] like figure 2 The first half-ring assembly 10 shown includes two half-ring plates 1 ( Figure 4 ), two first ring plates 4 ( Figure 5 ), a second ring plate 5 ( Image 6 ), three ribs 6 ( Figure 8 ), two first fixed blocks 7 ( Figure 9 ), four second bolts 8.

[0039] Among them, each rib plate 6 is similar to a concave shape, so as to figure 2 Bottom view and Figure 8 In terms of the direction in the middle, the rib 6 includes opposite top and bottom edges, the top and bottom edges are provided with a straight inner side perpendicular to the same side, and the outer side opposite to the inner side is inward. The curved arc shape forms a gap on the outer side of the rib plate 6 .

[0040] The three ribs 6...

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Abstract

The invention relates to a gas protection device for the back face of a welding line. The gas protection device for the back face of the welding line is used when gas protection automatic welding is carried out at a circumferential weld outer groove; the device adopts two symmetrically assembled semi-ring components to cover a circumferential weld inner wall groove; a second ring plate without a gas-guide hole and a third ring plate with a gas-guide hole are connected between inner side arc edges of two semi-ring plates of the same semi-ring component; a plurality of rib plates are also connected between the two semi-ring plates, and are uniformly distributed in a semicircle on which the semi-ring plates are located; and the inner side edges of the rib plates are connected with the outer side faces of the second ring plates and the third ring plates. Fixed blocks are connected to the two ends of the diameters of the semicircles on which the second ring plates or the third ring plates are located; each two adjacent fixed blocks are connected through a bolt, so that the two semi-ring components are connected; and between the semi-ring plates of the same semi-ring component, and in the range of the outer sides of the second ring plates or the third ring plates, protected gas is guided into through the gas-guide hole of each third ring plate, so that a favorable gas protection effect is achieved. The gas protection device for the back face of the welding line provided by the invention is simple in structure, and convenient and fast to assemble and disassemble.

Description

technical field [0001] The invention relates to a welding auxiliary device, in particular to a gas protection device for the back side of a weld. Background technique [0002] In the field of nuclear power or chemical containers, when the outer groove of the circular seam of parts is automatically welded with gas protection, the inner wall of the circular seam is generally protected by gas on the back. In general, the inner wall of the circular seam is sealed with tape or canvas, and then the inner wall of the circular seam is sealed. The gas conduit is placed in the small hole on the sealing material for gas protection. This method is relatively simple, but the sealing effect and gas protection effect are not good. Contents of the invention [0003] The invention provides a gas shielding device for the back of the weld seam, which can provide good gas shielding effect when welding the inner wall of the circular seam. [0004] In order to achieve the above object, the tec...

Claims

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Application Information

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IPC IPC(8): B23K9/32
CPCB23K9/325
Inventor 李双燕徐超黄远超罗庆
Owner SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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