CN201696749U

CN201696749U - Breakage prevention structure for thin-wall metal pipe

Info

Publication number: CN201696749U
Application number: CN2010202354192U
Authority: CN
Inventors: 左铁军; 赵越; 杨训; 孙德兴; 万延尧
Original assignee: QINGDAO HAIQING MECHANISM PLANT
Current assignee: QINGDAO HAIQING MECHANISM PLANT
Priority date: 2010-06-13
Filing date: 2010-06-13
Publication date: 2011-01-05
Anticipated expiration: 2020-06-13

Abstract

The utility model relates to a thin-wall metal pipe or pipeline, particularly to a breakage prevention structure for a thin-wall metal pipe, which can prevent roundness distortion or cracking of the thin-wall metal pipe during bending. The breakage prevention structure comprises a thick-wall thermal shrinkage pipe section and a thin-wall metal pipe. When the thin-wall metal pipe is required to be bent, the thick-wall thermal shrinkage pipe section larger than the bending curve length is completely sheathed outside the bending site of the thin-wall metal pipe and fixed, and then to-be-bent site of the thin-wall metal pipe is bent. When the thin-wall metal pipe is bent, the thick-wall thermal shrinkage pipe can decompose the external force applied on the outer wall of the thin-wall metal pipe, so as to avoid non-uniform local stress of the thin-wall metal pipe, effectively reduce the capacity of roundness distortion or cracking of the thin-wall metal pipe after bending, and effectively avoid the impact of the thin-wall metal pipe on flow after bending or the occurrence of leakage accident. The breakage prevention structure adopts a practical and economic scheme when the thin-wall metal pipe is required to be bent on site.

Description

A kind of anti-folded structure of thin-wall metal tube

Technical field

The utility model relates to a kind of thin-wall metal tube or pipeline (following general designation tubing) prevent distortion of pipeline circularity or cracking when bending anti-folded structure.

Background technique

Along with the requirement of market economy and national sustainable development, the material of product is more and more saved, and under the prerequisite of guaranteed performance, the wall thickness of material constantly reduces.Carry the pipeline of liquid medium this phenomenon also to occur, yet also bring certain drawback, when thin-wall metal tube at the scene in the installation process, must need brake forming, distortion of pipeline circularity or the cracking phenomena that thin-wall metal tube constitutes can take place, and has a strong impact on the flow of pipeline medium or the dielectric leakage of conveying.Traditional mode is that the exterior design spring at pipeline limits the circularity distortion of metal thin-wall pipeline or avoids stress to concentrate and cause pipeline to produce fine crack.But concerning the different thin-wall metal tube of external diameter, then can't realize this target, in addition, the problems such as electrochemical corrosion of spring price height, spring surface treatment befouling environment, spring and protected pipeline fitting also often perplex design and use; Cost will be bigger if the outer wall at spring is aided with modified plastic! In this case, adopting spring control metal thin wall pipe circularity distortion or leakage problem, is not optimum scheme.

Summary of the invention

The purpose that the utility model proposes a kind of anti-folded structure of thin-wall metal tube is to overcome the shortcoming of prior art, outer cover last layer at the thin-wall metal tube crooked position promptly has enough hardness, thickness, the good again heavy wall heat-shrink tube of pliability, circularity distortion or leakage problem in the time of can avoiding thin-wall metal pipelines by bending effectively, and free from environmental pollution, cost is littler.

For the anti-folded structure of a kind of thin-wall metal tube of the present utility model, the problems referred to above are to solve like this: get one section heavy wall heat-shrink tube, be enclosed within the outside and fixing of thin-wall metal tube crooked position.The anti-folding principle of this technological scheme is: the heavy wall heat-shrink tube closely covers thin-wall metal pipelines needs curved exterior surface, when thin-wall metal pipelines carries out bending operation, because the limit deformation effect of heavy wall heat-shrink tube during to the thin metallic tubd curved way, having alleviated influence flow or local pressure inequality after the distortion of thin-wall metal tube circularity and makes tubing crackle occur and leakage phenomenon generation that refrigeration agent runs off.

The utility model beneficial effect is: by the outer installment heavy wall heat-shrink tube at thin-wall metal tube, can make metal thin wall pipe in installation process, prevent that effectively bending from causing the influence of flow or the phenomenon generation of fed sheet of a media leakage, make thin-wall metal tube that purposes more widely be arranged, can be country and enterprise and save more material and fund.Simultaneously this structure prevents the institute's section of protection corrosion of piping in addition, the reduction less environmental contamination.

Description of drawings

Fig. 1 is the simplified schematic diagram of analysing and observe that is with loose heavy wall heat-shrink tube thin-wall metal tube;

Fig. 2 is the thin-wall metal tube flexural loading cross-sectional schematic after the heavy wall heat-shrink tube is fixed;

Fig. 3 is that the diameter thin-wall metal tube that do not wait that is with the heavy wall heat-shrink tube is analysed and observe simplified schematic diagram;

The decorative pattern simplified schematic diagram that Fig. 4 heavy wall heat-shrink tube inner and outer surface is carved with;

Among the figure: 1, thin-wall metal tube, 2, the heavy wall heat-shrink tube, 3, contain thread pattern, 4, treat crooked center line, 5, the crooked position arc length, F, be bending force.

Embodiment

A kind of anti-folded structure of thin-wall metal tube, constitute by thin-wall metal tube 1 and heavy wall heat-shrink tube 2, with length should be sleeved on greater than the heavy wall heat-shrink tube 2 of crooked position arc length 5 thin-wall metal tube 1 treat crooked outer wall after (see figure 1) fix, and the interval of crooked position arc length 5 covered fully, heavy wall heat-shrink tube 2 can effectively improve the flexural capacity of thin-wall metal tube after technology is fixing.

The thin-wall metal tube 1 (as Fig. 3) that reducing is handled, the outer wall in the bending part of its reducing puts heavy wall heat-shrink tube 2, treat crooked center line 4 can the reducing center or near, can solve the anti-folding problem of thin-wall metal tube after fixing equally.

Can multilayer heavy wall heat-shrink tube 2 be installed at the crooked position of thin-wall metal tube, further solve the circularity distortion or the cracking problem of metal thin wall pipe when crooked as 2 layers, 3 layers, 4 bed thickness wall heat-shrink tubes 2, outer field shell material can use rubber, soft metal, plastics etc. alternative.

We can process some screw thread class figures on the inside and outside tube wall of heavy wall heat-shrink tube 2, can not influence it as the anti-folding effect that is enclosed within the thin-wall pipes outside.

A kind of anti-folded structure of metal thin wall pipe is fixed on the thickness of heavy wall heat-shrink tube 2 on thin-wall metal tube 1 outer wall, need be more than or equal to 0.6 millimeter.

A kind of anti-folded structure of metal thin wall pipe is fixed on the heavy wall heat-shrink tube 2 on thin-wall metal tube 1 outer wall, can fix when producing metal thin wall pipe, also can fix when metal thin wall pipe is crooked.

The present utility model describes with reference to accompanying drawing; but protection domain is not limited thereto; in the present utility model technical scope, have those of ordinary skill and can pass through simple conversion, and obtain the same technique effect of the present utility model, equally in protection scope of the present invention.

Claims

1. the anti-folded structure of a thin-wall metal tube, comprise that one section thin-wall metal tube (1) and one section heavy wall heat-shrink tube (2) constitute, it is characterized in that: at crooked position outer cover the preceding paragraph heavy wall heat-shrink tube (2) of thin-wall metal tube (1), length should be greater than treating curved part position arc length (5), and the camber line interval of crooked position arc length (5) is covered fully.

2. the anti-folded structure of a kind of thin-wall metal tube according to claim 1, it is characterized in that: the outer wall of the thin-wall metal tube of reducing (1) in the bending part of its reducing puts, and suit heavy wall heat-shrink tube (2) is also fixing.

3. according to the anti-folded structure of claim 1 and 2 described a kind of thin-wall metal tubes, it is characterized in that: the crooked position of thin-wall metal tube (1) is installed multilayer heavy wall heat-shrink tube (2), the circularity distortion or the cracking problem of metal thin wall pipe when further solving bending as 2 layers/3 layers/4 bed thickness wall heat-shrink tubes (2).

4. according to the anti-folded structure of claim 1 and 3 described a kind of thin-wall metal tubes, it is characterized in that: outer field heavy wall heat-shrink tube (2) shell material can use rubber, soft metal, plastics to substitute.

5. the anti-folded structure of a kind of thin-wall metal tube according to claim 1 is characterized in that: process screw thread class figure on the inside and outside tube wall of heavy wall heat-shrink tube (2).

6. the anti-folded structure of a kind of thin-wall metal tube according to claim 1, it is characterized in that: be fixed on the heavy wall heat-shrink tube (2) on the thin-wall metal tube (1), its thickness is more than or equal to 0.6 millimeter.

7. the anti-folded structure of a kind of thin-wall metal tube according to claim 1, it is characterized in that: be fixed on the heavy wall heat-shrink tube (2) on thin-wall metal tube (1) outer wall, can when producing thin-wall metal tube, fix, also can when metal thin wall pipe is crooked, fix.