CN206708713U

CN206708713U - A kind of fluctuation-type welded steel pipes

Info

Publication number: CN206708713U
Application number: CN201621168430.5U
Authority: CN
Inventors: 彭福华
Original assignee: Chongqing Guangji Industrial Co Ltd
Current assignee: Chongqing Guangji Industrial Co Ltd
Priority date: 2016-11-02
Filing date: 2016-11-02
Publication date: 2017-12-05
Anticipated expiration: 2026-11-02

Abstract

The utility model discloses a kind of fluctuation-type welded steel pipes, it is characterized in that including metal tape, metal tape both sides are respectively equipped with just profound wave edges, metal tape is bent along spiral path, the crest and trough of the just profound wave edges of adjoining spiral metal interband correspond the simultaneously soldering that coincide, the crest and trough being coincide on metal tape weld seam on one circle spiral are 10 to 20 pairs, and the height of trough to the crest of the just profound waveform of metal strip edge is 0.7 to 1.3 times of spacing between two crests；The weld seam general direction of the utility model fluctuation-type welded steel pipes is still spiral, suitable for making longer pipeline, when being stressed, stress in welded joints while act also on metal tape interlock crest position, bearing part stress is shared at metal tape crest position, so as to reduce the stress of commissure, reduces the probability that commissure goes wrong, reliability is improved, meets the place of highly reliable requirement.

Description

A kind of fluctuation-type welded steel pipes

Technical field

A kind of metallic conduit of spiral weld is the utility model is related to, more particularly to a kind of fluctuation-type welded steel pipes.

Background technology

Feed-line is often used in the industrial production, and such as heating power, running water, oil, natural gas field size are larger Pipeline, the also small size pipeline such as cable sheath tube is all long during these pipe applications, typically using spiral weld Pipe, by causing, the stress of deformation is all bigger, and the tension of its weld seam is strong after either being transported or installed due to longer dimension Degree just seems most important, is the key point of spiral-selded pipe quality assurance, the weld seam of existing spiral-selded pipe is exactly one Bar is concentrated mainly on commissure along spiralling normal spiral weld seam, during by distortional stress, is easily asked in commissure Topic, is still solved up for technological innovation.

Utility model content

In order to solve the above problems, the utility model provides a kind of fluctuation-type welded steel pipes.

The technical solution adopted in the utility model is：A kind of fluctuation-type welded steel pipes, it is characterised in that including metal tape, gold Category band both sides are respectively equipped with just profound wave edges, and metal tape is bent along spiral path, the just profound waveform of adjoining spiral metal interband The crest and trough at edge correspond the simultaneously soldering that coincide, and the crest and trough being coincide on a metal tape weld seam enclosed on spiral are 10 to 20 pairs, the height of trough to the crest of the just profound waveform of metal strip edge is 0.7 to 1.3 times of spacing between two crests.

Further, the edge Dao You oblique angles of the just profound waveform of the metal tape.

The weld seam general direction of the utility model fluctuation-type welded steel pipes is still spiral, suitable for making longer pipe Road, metal tape both sides of the edge are arranged respectively to just profound waveform, the just profound waveform side of adjoining spiral metal interband along spiral weld The crest and trough of edge correspond the simultaneously soldering that coincide, and thus change original straight weld seam, are changed into fluctuating along spiral Weld seam staggeredly, when being stressed, stress in welded joints while act also on metal tape interlock crest portion Bearing part stress is shared at position, metal tape crest position, and so as to reduce the stress of commissure, reduction commissure goes wrong several Rate, reliability is improved, meet the place of highly reliable requirement.

Brief description of the drawings

Fig. 1 is that pipe schematic diagram is made in the utility model embodiment.

Fig. 2 is that the utility model implements schematic diagram after plate cutting.

Reference:1 metal tape；2 crests；3 troughs；4 spiral weld steel pipes.

Embodiment

As shown in Figure 1, 2, the fluctuation-type welded steel pipes include metal tape 1, the big material of metal tape to the utility model embodiment It can as needed select, heavy wall can be used during larger-size pipeline in fields such as heating power, running water, oil, natural gases Steel plate, relatively thin steel plate can be used when for cable sheath tube, can use some shielding properties good when needing shielding Good alloy material, just profound wave edges are respectively equipped with metal tape both sides, form crest 2 and trough 3, metal tape is along spiral road Footpath is bent in a tubular form, and the crest and trough of the just profound wave edges of adjoining spiral metal interband correspond the simultaneously soldering that coincide and formed Spiral weld steel pipe 4, the crest and trough coincideing on the metal tape weld seam on a circle spiral are 10 to 20 pairs, crest and trough Spacing is calculated according to caliber and helical angle, and the position of crest or trough on both sides of the edge can calculate according to helical angle Go out, the integral multiple of circle helix length spacing for crest between, be not have to both sides aligned fashion, need to meet to engage one by one i.e. Can, the height of trough to the crest of the just profound waveform of metal strip edge is 0.7 to 1.3 times of spacing between two crests, it is interlocked Position has suitable depth, can preferably load sharing stress, while weld seam is not long, can in the just profound waveform of metal tape Edge Dao You oblique angles, meet welding demand.

It is only in summary the utility model preferred embodiment, all equivalent modification done according to the application and prior art add Add and be accordingly to be regarded as the utility model technology category.

Claims

1. a kind of fluctuation-type welded steel pipes, it is characterised in that including metal tape, metal tape bends in a tubular form and welded along spiral path Conjunction forms spiral weld steel pipe, and metal tape both sides are respectively equipped with just profound wave edges, and metal tape is bent along spiral path, adjacent spiral shell Revolve the crest of the just profound wave edges of metal interband and trough corresponds the simultaneously soldering that coincide, a metal tape weld seam enclosed on spiral Upper identical crest and trough are 10 to 20 pairs, and the height of the trough of the just profound waveform of metal strip edge to crest is between two crests 0.7 to 1.3 times of spacing；The edge Dao You oblique angles of the just profound waveform of the metal tape.