CN211502008U

CN211502008U - Rectangular corrugated pipe for sintering smoke and air circulating system

Info

Publication number: CN211502008U
Application number: CN201922389349.XU
Authority: CN
Inventors: 王庆捷; 何绍杰; 马利珍; 路思明; 石晓亮; 宋红伟
Original assignee: Qinhuangdao North Metal Hose Co ltd
Current assignee: Qinhuangdao North Metal Hose Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-15
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a rectangle bellows for sintering cigarette wind circulation system, includes bellows body and two end joint pipes of connecting at rectangle bellows body both ends, rectangle bellows bent angle department is formed by fan-shaped fillet section through with straight limit section welding, and the wave form of rectangle bellows body is "pi" shape, and the end panel position of each fillet section that constitutes rectangle bellows body is equipped with and forms the fold by unsmooth line, and unsmooth line route is distributed by the inboard outside extension of fillet section. The utility model discloses the design of needle can improve the material extension ability of fillet position, and the circumference stress of effective absorption fillet department makes rectangle bellows fillet section and whole stress tend to evenly, avoids answering local stress big and too early emergence damage. Adopt the utility model discloses need not to increase the material cost of shape bellows and can reach the purpose that improves fillet section intensity, eliminate the easy damaged drawback of fillet end, improve rectangular corrugated pipe's life.

Description

Rectangular corrugated pipe for sintering smoke and air circulating system

Technical Field

The utility model relates to a pipeline part, especially a rectangle bellows that is used for sintering cigarette wind circulation system.

Background

The metal expansion joint is a pipeline compensation element, and the metal corrugated pipe is a core part of the expansion joint. The metal expansion joint utilizes the expansion deformation to absorb the size change of the pipeline caused by expansion with heat and contraction with cold, or compensates the displacement of the pipeline and has the functions of noise reduction and vibration reduction. The section of the rectangular metal corrugated pipe is rectangular so as to be matched with a connected pipeline. The rectangular metal corrugated pipe is mainly used in industries such as petroleum, steel, electric power and the like, and the conveying medium is hot air and can compensate fixed displacement. A large-section rectangular corrugated pipe used at the joint between a pipeline and equipment of a flue gas and air stepped circulation system in the sintering production of the steel industry is composed of a rectangular corrugated pipe body and two rectangular end connecting pipes, wherein the bent angle of the rectangular corrugated pipe body is formed by welding 1/4 fillet waves and straight edge waves into a rectangle. During the use process, the round corner part of the rectangular corrugated pipe which works under the vibration and high-temperature working conditions is most easily damaged under the impact of a medium. Through computer simulation calculation, the maximum stress borne by the rectangular corrugated pipe occurs at the end face plates of four fillets of the rectangular corrugated pipe, the stress is unevenly distributed along the circumferential direction of the fillets, and the inner circle stress of the fillets is greater than that of an excircle, so that the part, close to the inner circle, of the end face plate of the fillet section is the weakest part of the rectangular corrugated pipe and is also the potential safety quality hazard. In general, a method of increasing the material strength or the wall thickness is adopted to improve the strength of four round corner sections of the rectangular corrugated pipe, so that the manufacturing cost of the rectangular corrugated pipe is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the drawback of prior art, provide one kind and can effectively improve rectangle bellows fillet section intensity, realize the even rectangle bellows that is used for sintering cigarette wind circulation system of bellows and whole stress.

The problem of the utility model is realized with following technical scheme:

the utility model provides a rectangle bellows for sintering cigarette wind circulation system, includes bellows body and two end joint pipes of connecting at rectangle bellows body both ends, the rectangle bellows is formed by fan-shaped fillet section through welding with the straight limit section, and the wave form of rectangle bellows body is "pi" shape, and the end panel position that constitutes each fillet section of rectangle bellows body is equipped with forms the fold by unsmooth line, and unsmooth line is distributed by the inboard outside extension of fillet section.

The above rectangular corrugated pipe for the sintering flue gas and air circulation system is arc-shaped, the geometric center of each concave-convex line coincides with that of the circular angle plate, and the distance between the concave-convex lines increases progressively from inside to outside.

The rectangular corrugated pipe for the sintering flue gas and air circulating system has the advantages that concave-convex lines at the end face plates corresponding to the circular bead sections are symmetrically distributed.

The rectangular corrugated pipe for the sintering flue gas and air circulating system has at least three concave-convex lines on the end face plate of each round corner section.

The utility model discloses the problem to the big easy damage that takes place of rectangle bellows fillet section stress for sintering cigarette wind circulation system is improved, sets up the concave-convex line at the end panel that the wave form is the rectangle bellows fillet end of "pi" shape. The improvement can improve the material extensibility of the round corner part, effectively absorb the stress of the round corner part, lead the round corner section of the rectangular corrugated pipe and the integral stress to be even, and avoid premature damage caused by large local stress. Adopt the utility model discloses need not to increase the material cost of shape bellows and can reach the purpose that improves fillet section intensity, eliminate the easy damaged drawback of fillet end, improve rectangular corrugated pipe's life.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a sectional view (enlarged) taken along line a-a of fig. 1.

The reference numbers in the figures are: 1. bellows body, 2, end joint pipe, 3, fillet section, 4, concave convex lines, 5, straight limit section.

Detailed Description

Referring to fig. 1-3, the rectangular corrugated pipe comprises a corrugated pipe body 1 and two end connecting pipes 2 connected to two ends of the rectangular corrugated pipe body, wherein the corner of the rectangular corrugated pipe is formed by welding a fan-shaped round section 3 of 1/4 circles with a straight edge section 5, and the waveform of the rectangular corrugated pipe body is n-shaped. For the intensity at the end panel position that improves the fillet section that bears stress great, fragile, the utility model discloses end panel position at each fillet section that constitutes the rectangle bellows body has set up and has formed the fold by unsmooth line 4, and the inboard outside extension of unsmooth line route fillet section, unsmooth line are convex, and the geometric centre of each unsmooth line coincides with the geometric centre of fillet. The field practical investigation is combined with ANSYS software simulation analysis, the maximum stress of the rectangular corrugated pipe occurs at the end face plates of four round corners of the rectangular corrugated pipe, the distribution of the maximum stress on the end face plates of the round corners is uneven, and the stress on the inner side of the rectangular corrugated pipe is larger when the rectangular corrugated pipe is closer to the round corner section. In view of this, the distance between adjacent concave-convex lines is designed to be gradually increased from inside to outside, and the distance between adjacent concave-convex lines is set according to 1.2 to 1.3 times. The section of the concave-convex lines adopts a wave shape with smooth transition. The concave-convex lines at the end face plate corresponding to each fillet section are symmetrically distributed, and the concave-convex lines on the end face plate of each fillet section are not less than three. The improvement can improve the material extension capacity of the round corner part through the arranged wrinkles, effectively absorb the circumferential stress of the round corner part, enable the round corner section of the rectangular corrugated pipe to be even with the overall stress, and avoid premature damage caused by large local stress. The illustrated embodiment is a single-node rectangular bellows, and the same applies to the structure described above for a multi-node rectangular bellows node.

When the utility model is manufactured, concave-convex lines are pressed on the flat plate according to the geometric dimension of the fillet section; then, forming and processing the embossed material plate; welding the formed fillet section; welding the welded round angle section and the straight edge section to form a rectangular corrugated pipe body; and end connecting pipes are welded at two ends of the rectangular corrugated pipe body.

Claims

1. The utility model provides a rectangle bellows for sintering cigarette wind circulation system, includes bellows body (1) and two end joint pipes (2) of connection at rectangle bellows body both ends, the rectangle bellows is formed by sectorial fillet section (3) through welding with straight limit section (5), and the wave form of rectangle bellows body is "pi" shape, its characterized in that: the end surface plate part of each round angle section forming the rectangular corrugated pipe body is provided with a fold formed by concave-convex lines (4), and the concave-convex lines are distributed from the inner side of the round angle section to the outer side in an expanding way.

2. The rectangular bellows for a sintering flue gas air circulation system according to claim 1, wherein: the concave-convex lines are arc-shaped, the geometric centers of the concave-convex lines are coincided with the geometric centers of the corner plates, and the distance between the concave-convex lines is increased from inside to outside.

3. The rectangular bellows for a sintering flue gas air circulation system according to claim 2, wherein: the concave-convex lines at the end face plate corresponding to each fillet section are symmetrically distributed.

4. The rectangular bellows for a sintering flue gas air circulation system according to claim 3, wherein: concave-convex lines on the end panel of each round angle section are not less than three.