CN103867733A

CN103867733A - Welding structure of metal corrugated pipe component for valve

Info

Publication number: CN103867733A
Application number: CN201310593332.0A
Authority: CN
Inventors: 朱义芳; 张逢利; 耿成林
Original assignee: Jiangsu Xinghe Valve Co Ltd
Current assignee: Jiangsu Xinghe Valve Co Ltd
Priority date: 2013-11-23
Filing date: 2013-11-23
Publication date: 2014-06-18

Abstract

The invention aims at providing a welding structure of a metal corrugated pipe component for a valve. The welding structure consists of a metal corrugated pipe, a valve core and a flange, wherein the two ends of the metal corrugated pipe are made into cylindrical opening shapes, the end surfaces of the openings incline outwards by about 30 degrees, and the inner diameter of the metal corrugated pipe is respectively matched with the valve core and the flange; a groove of a welding step for the valve core and the flange is about 30 degrees, and the groove and an end opening of the metal corrugated pipe form a welding seam about 60 degrees. The welding structure provided by the invention has the advantage that the requirements for the thin wall, multiple layers, excellent elasticity, pressure resistance, temperature resistance, fatigue resistance and long service life of the corrugated pipe are met.

Description

The welded structure of valve-use metal bellows component

Technical field

The present invention relates to Bellows valve design and manufacture, be widely used in the higher pipeline of seal request, particularly poisonous, be harmful to, have keying and control gear in radioactivity and inflammable and explosive liquid or gas medium pipeline.

Background technique

The valve mechanism of extensive use is all realized anti-external leakage sealing by upper filler, because filler is rubbed, vibrations, the impact of the factor such as pressure and environment, in structure, exist the possibility of leakage, and it is poisonous, inflammable, explosive, there is radioactivity etc. to safety, environment and the healthy medium working the mischief have not allowed to leak outside, Bellows valve is exactly a kind of very safe and reliable product, wherein bellows is kernel component crucial in this product, owing to being subject to the impact of different pressures and temperature, particularly high temperature, in the situation of high pressure, bellows thin-walled, multilayer and whippy characteristic are most important to its welded structure.

Summary of the invention

The object of the present invention is to provide a kind of welded structure of valve-use metal bellows component, to meet bellows thin-walled, multilayer, elasticity excellence, withstand voltage, heatproof, antifatigue, long requirement of life-span.

Solving the technological scheme that above technical problem takes is:

1, a kind of welded structure of valve-use metal bellows component, formed by metal bellows, spool, flange, it is characterized in that: metal bellows determines according to pressure, temperature, flow that respectively the technical parameters such as the number of plies, stroke, wall thickness, length, the pitch of waves, wave number and inner and outer diameter design, by one deck to multiple-layer stacked, the metal tube of every layer of wall thickness 0.08mm to 0.25mm is made through mold pressing, its two ends respectively with spool, flange welding.

2, the uncovered shape of cylinder is made at the two ends of described metal bellows, mouth left and right, 30 °, outside oblique angle of end face, its internal diameter coordinates with spool and flange respectively, and fit dimension d is less than or equal to the outer diameter D 1-2b of bellows, and the welding step outer diameter D 2 of spool and flange is more than or equal to D1-2b.

3, the welding step groove of described spool and flange is 30 ° of left and right, with the weld seam of 60 ° of left and right of wavy metal tube opening formation.

Advantage of the present invention and beneficial effect are:

1, valve in use metal bellows to draw high compression movement consistent with pressurized direction, the no matter inside and outside pressurized of metal bellows, the influence power of butt welded seam is less.

2, withstand voltage, the heatproof of weld seam and endurance life are greater than the intensity of metal bellows, have ensured the reliability of weld seam, are specially adapted to high temperature, high-pressure bellows valve.

Brief description of the drawings

Fig. 1 is valve-use metal bellows component welded structure figure;

Fig. 2 is A portion welding line structure enlarged view in Fig. 1.

In figure: 1, spool 2, flange 3, metal bellows 4, weld seam D1, outside diameter of bel D2, welding step outside diameter d, cooperation external diameter b, multiply bellows total thickness.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described.

1, a kind of welded structure of valve-use metal bellows component, formed by metal bellows (3), spool (1), flange (2), it is characterized in that: metal bellows (3) determines according to pressure, temperature, flow that respectively the technical parameters such as the number of plies, stroke, wall thickness, length, the pitch of waves, wave number and inner and outer diameter design, by one deck to multiple-layer stacked, the metal tube of every layer of wall thickness 0.08mm to 0.25mm is made through mold pressing, and weld with spool (1), flange (2) respectively at its two ends.

2, the uncovered shape of cylinder is made at the two ends of described metal bellows (3), mouth left and right, 30 °, outside oblique angle of end face, its internal diameter coordinates with spool (1) and flange (2) respectively, fit dimension (d) is less than or equal to the outer diameter D 1-2b of metal bellows (3), and the welding outer diameter of step (D2) of spool (1) and flange (2) is more than or equal to D1-2b.

3, the welding step groove of described spool (1) and flange (2) is 30 ° of left and right, with the weld seam of 60 ° of left and right of metal bellows (3) port formation.

Claims

1. the welded structure of a valve-use metal bellows component, formed by metal bellows (3), spool (1), flange (2), it is characterized in that: metal bellows (3) determines according to pressure, temperature, flow that respectively the technical parameters such as the number of plies, stroke, wall thickness, length, the pitch of waves, wave number and inner and outer diameter design, by one deck to multiple-layer stacked, the metal tube of every layer of wall thickness 0.08mm to 0.25mm is made through mold pressing, and weld with spool (1), flange (2) respectively at its two ends.

2. according to the welded structure of a kind of valve-use metal bellows component described in claim 1, it is characterized in that: the uncovered shape of cylinder is made at the two ends of metal bellows (3), mouth left and right, 30 °, outside oblique angle of end face, its internal diameter coordinates with spool (1) and flange (2) respectively, fit dimension (d) is less than or equal to the outer diameter D 1-2b of metal bellows (3), and the welding outer diameter of step (D2) of spool (1) and flange (2) is more than or equal to D1-2b.

3. according to the welded structure of a kind of valve-use metal bellows component described in claim 2, it is characterized in that: the welding step groove of described spool (1) and flange (2) is 30 ° of left and right, with the weld seam of 60 ° of left and right of metal bellows (3) port formation.