CN212793642U

CN212793642U - Bellows welded structure

Info

Publication number: CN212793642U
Application number: CN202021687665.1U
Authority: CN
Inventors: 周时龙; 郑成亮; 曹新民; 姚龙涛; 熊善文
Original assignee: Keyuan Energy Equipment Co ltd
Current assignee: Jiaxing Keyuan Energy Equipment Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-03-26
Anticipated expiration: 2030-08-13

Abstract

The utility model relates to the technical field of corrugated pipes, and discloses a corrugated pipe welding structure, which comprises a corrugated pipe body and a connecting part, wherein the corrugated pipe body comprises a corrugated pipe section and a straight pipe section, the connecting part comprises an inner ring, one end of the inner ring, which is back to the corrugated pipe section, is provided with a circle of self-melting tank, the self-melting tank is arranged on the end surface of the inner ring along the circumferential direction of the inner ring by taking the axis of the inner ring as a reference, so that the part between the self-melting groove and the inner wall of the inner ring, which is convex back to the direction of the corrugated pipe section, forms a self-melting block, and one end of the straight pipe section, which is far away from the corrugated pipe section, is flush with the top end of the self-melting block, the scheme has the advantages that through the arrangement of the straight pipe section, the two ends of the corrugated pipe are not required to be cut, the phenomena of flash, burr and the like are fundamentally solved, and through the arrangement of structures such as the self-melting groove and the self-melting block, a new welding structure is formed, so that the welded straight pipe section and the self-melting block on the inner ring are melted in the self-melting groove, and the problem of welding leakage is solved.

Description

Bellows welded structure

Technical Field

The utility model relates to a bellows technical field, concretely relates to bellows welded structure.

Background

The corrugated pipe mainly comprises a metal corrugated pipe, a corrugated expansion joint, a corrugated heat exchange pipe, a diaphragm capsule, a metal hose and the like. The metal corrugated pipe is mainly applied to the effects of compensating the thermal deformation of a pipeline, damping, absorbing the settlement deformation of the pipeline and the like, and is widely applied to the industries of petrifaction, instruments, aerospace, chemical industry, electric power, cement, metallurgy and the like. The corrugated pipe made of other materials such as plastics has irreplaceable effects in the fields of medium conveying, electric power threading, machine tools, household appliances and the like.

In the low-temperature waste heat power generation technology, because a working medium pipeline has high working pressure and temperature (the working pressure is 16bar, the working temperature is 85 degrees) to a working medium, the welding structure of a corrugated pipe on the working medium pipeline has high requirements on leakage and cleaning, in the conventional corrugated pipe structure welding manufacturing process, the conventional process is shown in figure 1, a formed corrugated pipe is cut off according to needs to obtain a corrugated pipe section 3 with a corresponding length, then two ends of the corrugated pipe section 3 are flattened, and are welded with an inner ring 5 by argon tungsten-arc welding, because the material of the corrugated pipe is thin, thin-wall welding penetration and other phenomena are easy to occur after welding is carried out, and the welding is easy to lead to poor welding and leakage after flattening; burr residue can appear after the bellows is tailor, does not satisfy product operation requirement, and the deburring is remained after need flattening again, leads to increasing equipment and labour cost, and welds after flattening and easily leads to the untight leakage rework that causes of welding.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a bellows welded structure, it has need not tailor the process of flattening, and fundamentally has solved the overlap burr and has leaded to bellows section and inner ring welding to take place the advantage of leaking the problem.

The above technical purpose of the present invention can be achieved by the following technical solutions: a corrugated pipe welding structure comprises a corrugated pipe body and a connecting part, wherein the corrugated pipe is connected with a connecting pipe through the connecting part, the corrugated pipe body comprises a corrugated pipe section and straight pipe sections coaxially arranged at two ends of the corrugated pipe section, the connecting part comprises an inner ring, the inner ring is sleeved on the outer side surface of the straight pipe section, and the inner diameter of the inner ring is the same as the outer diameter of the straight pipe section;

the end, back to the corrugated pipe section, of the inner ring is provided with a circle of self-melting grooves, the self-melting grooves are formed in the end face of the inner ring along the circumferential direction of the inner ring by taking the axis of the inner ring as a reference, so that self-melting blocks are formed on the protruding portions, back to the corrugated pipe section, between the self-melting grooves and the inner wall of the inner ring, and one end, far away from the corrugated pipe section, of the straight pipe section is flush with the top end of the self-melting blocks.

The utility model discloses in, it is preferred, from the frit top extremely be less than from the distance of the interior diapire of molten bath the inner ring has been seted up from the one end wall of molten bath extremely from the distance of the interior diapire of molten bath, the inner ring has been seted up the one end from the molten bath is the fixed location bulge loop that is provided with still, the inner wall of location bulge loop with keep away from the molten bath the lateral wall parallel and level of inner ring axis one side.

In the present invention, preferably, the distance from the melting tank to the inner ring inner wall is smaller than the distance from the melting tank to the inner ring outer wall.

In the present invention, preferably, the inner ring abuts against the straight edge of the side wall of the bellows section at one end of the bellows section.

The utility model discloses in, it is preferred, the inner ring external diameter with the external diameter of bellows section is the same, and this bellows welded structure still includes metal mesh and outer loop, the metal mesh cladding is in the outside of bellows section, the outer loop cover is established the outside of metal mesh, the metal mesh with through welded connection between the outer loop, the outer loop with inner ring welded connection.

The utility model discloses in, preferred, the inner ring the outer loop the metal mesh the bellows body and the material of takeover all adopt austenitic stainless steel.

Compared with the prior art, the beneficial effects of the utility model are that:

this scheme need not tailor the both ends of bellows through the setting of straight tube section, and fundamentally has solved phenomenons such as overlap burr, and through from the molten groove, from the setting of structures such as frit, forms new welded structure for the straight tube section melts in the molten groove from the frit on welding back and the inner ring, solves the welding leakage problem.

Drawings

FIG. 1 is a schematic view of a conventional welding structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a partial enlarged view of portion B of FIG. 3;

fig. 5 is a partially enlarged view of a portion C in fig. 3.

In the drawings: 1. a bellows body; 2. a connecting portion; 3. a bellows section; 4. a straight pipe section; 5. an inner ring; 6. a self-melting tank; 7. a self-frit; 8. positioning the convex ring; 9. a metal mesh; 10. and (4) an outer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 3 to 5, a preferred embodiment of the present invention provides a corrugated pipe welding structure, including a corrugated pipe body 1 and a connecting portion 2, wherein the corrugated pipe is connected to the connecting pipe through the connecting portion 2, the corrugated pipe body 1 includes a corrugated pipe section 3 and straight pipe sections 4 coaxially disposed at two ends of the corrugated pipe section 3, the connecting portion 2 includes an inner ring 5, the inner ring 5 is sleeved on an outer side surface of the straight pipe section 4, and an inner diameter of the inner ring 5 is the same as an outer diameter of the straight pipe section 4; one end of the inner ring 5, which is away from the corrugated pipe section 3, is provided with a circle of self-melting groove 6, the self-melting groove 6 is arranged on the end surface of the inner ring 5 along the circumferential direction of the inner ring 5 by taking the axis of the inner ring 5 as a reference, so that a part protruding from the direction of the corrugated pipe section 3 between the self-melting groove 6 and the inner wall of the inner ring 5 is formed into a self-melting block 7, and one end of the straight pipe section 4, which is away from the corrugated pipe section 3, is flush with the top end of the self. Inner ring 5 in this scheme, outer loop 10, metal mesh 9, bellows body 1 and the material of takeover all adopt the austenitic stainless steel, set up straight tube section 4 through the both ends at common bellows section 3, straight tube section 4 inserts in inner ring 5, the control size guarantees basically that straight tube section 4 keeps away from the one end of bellows section 3 and flushes with the top from fritting 7, weld through argon tungsten-arc welding in the welding machine position, set up from fritting 7 and from fritting groove 6 on inner ring 5, weld the back from fritting 7 can with straight tube section 4 both ends melt mutually in from fritting groove 6, form wholly, thereby sealed problem has been solved. The corrugated pipe body 1 and the inner ring 5 are welded and then connected with a connecting pipe, a metal net 9 is sleeved on the connecting pipe to be welded with the outer ring 10, and finally the connecting pipe is welded to form a complete connecting structure.

From 7 tops of fritting to the distance of diapire in the self-melting groove 6 being less than inner ring 5 and offering the one end wall from melting groove 6 to the distance from the diapire in the melting groove 6, inner ring 5 is offered and still is fixed to be provided with location bulge loop 8 from the one end of melting groove 6, the inner wall of location bulge loop 8 with from the lateral wall parallel and level of 5 axis one sides of inner ring of melting groove 6 keep away from, the distance from melting groove 6 to 5 inner walls of inner ring is less than the distance from melting groove 6 to 5 outer walls of inner ring. The end of the inner ring 5 facing the bellows section 3 abuts against the straight edge of the side wall of the bellows section 3. The relative position between the connecting pipe and the connecting part 2 can be guided and limited by the arrangement, the connection between the connecting pipe and the connecting part 2 is optimized, the connection effect between the corrugated pipe body 1 and the connecting pipe through the connecting part 2 is better, and the possibility of leakage is reduced.

The outer diameter of the inner ring 5 is the same as that of the corrugated pipe section 3, the corrugated pipe welding structure further comprises a metal net 9 and an outer ring 10, the metal net 9 is coated outside the corrugated pipe section 3, the outer ring 10 is sleeved outside the metal net 9, the metal net 9 and the outer ring 10 are connected through welding, and the outer ring 10 is connected with the inner ring 5 through welding. Due to the arrangement, the sealing performance of the welding structure is guaranteed, and meanwhile the corrugated pipe body 1 is well protected.

Claims

1. The utility model provides a bellows welded structure, includes bellows body (1) and connecting portion (2), the bellows passes through connecting portion (2) are connected its characterized in that with the takeover: the corrugated pipe body (1) comprises a corrugated pipe section (3) and straight pipe sections (4) coaxially arranged at two ends of the corrugated pipe section (3), the connecting part (2) comprises an inner ring (5), the inner ring (5) is sleeved on the outer side surface of the straight pipe section (4), and the inner diameter of the inner ring (5) is the same as the outer diameter of the straight pipe section (4);

one end, back to the corrugated pipe section (3), of the inner ring (5) is provided with a circle of self-melting groove (6), the self-melting groove (6) is formed in the end face of the inner ring (5) along the circumferential direction of the inner ring (5) by taking the axis of the inner ring (5) as a reference, so that a part, protruding back to the direction of the corrugated pipe section (3), between the self-melting groove (6) and the inner wall of the inner ring (5) forms a self-melting block (7), and one end, far away from the corrugated pipe section (3), of the straight pipe section (4) is flush with the top end of the self-melting block (7).

2. A bellows welding structure according to claim 1, wherein: the distance from the top end of the self-melting block (7) to the inner bottom wall of the self-melting groove (6) is smaller than the distance from the end wall of one end, provided with the self-melting groove (6), of the inner ring (5) to the inner bottom wall of the self-melting groove (6), a positioning convex ring (8) is further fixedly arranged at one end, provided with the self-melting groove (6), of the inner ring (5), and the inner wall of the positioning convex ring (8) is flush with the side wall, away from one side of the axis of the inner ring (5), of the self-melting groove (6).

3. A bellows welding structure according to claim 1, wherein: the distance from the self-melting tank (6) to the inner wall of the inner ring (5) is smaller than the distance from the self-melting tank (6) to the outer wall of the inner ring (5).

4. A bellows welding structure according to claim 1, wherein: one end of the inner ring (5) facing the corrugated pipe section (3) is abutted against the straight edge of the side wall of the corrugated pipe section (3).

5. A bellows welding structure according to claim 1, wherein: the outer diameter of the inner ring (5) is the same as that of the corrugated pipe section (3), the corrugated pipe welding structure further comprises a metal net (9) and an outer ring (10), the metal net (9) is coated outside the corrugated pipe section (3), the outer ring (10) is sleeved outside the metal net (9), the metal net (9) is connected with the outer ring (10) in a welding mode, and the outer ring (10) is connected with the inner ring (5) in a welding mode.