CN216715566U

CN216715566U - Antidetonation metal collapsible tube

Info

Publication number: CN216715566U
Application number: CN202123312637.9U
Authority: CN
Inventors: 洪磊; 游庆阳; 彭琪; 洪亮; 吴秀华; 汪荣; 朱爱春
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-10
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to an anti-seismic metal hose, which consists of a connecting pipe, a corrugated pipe, a metal hose net sleeve and a sheath, wherein two ends of the corrugated pipe are respectively connected with the connecting pipe, the wall thickness of one end of the connecting pipe, which is connected with the corrugated pipe, is larger than that of the main body part of the connecting pipe, an annular groove is formed in the connecting pipe, the metal hose net sleeve is sleeved on the corrugated pipe and the part with the increased wall thickness of the corrugated pipe, and the sheath is arranged at the position, which is opposite to the increased wall thickness of the connecting pipe, of the metal hose net sleeve. The utility model has advanced structure design, easy processing, good thermal crack resistance, higher strength at the weld toe, no stress concentration, capability of absorbing vibration, thermal expansion and reciprocating motion in a severe working environment and good anti-seismic performance. The settlement of the compensation oil tank foundation that can have very much and the multidirectional displacement that the expend with heat and contract with cold produced between the pipeline and play the cushioning effect, can also the noise reduction, be applied to the junction of the oil storage tank of petrochemical industry and pipeline, the security performance is high, long service life.

Description

Antidetonation metal collapsible tube

Technical Field

The utility model relates to a metal hose, in particular to a novel anti-seismic metal hose.

Background

With the development of modern technology, the application of the metal hose in engineering is more and more extensive, and the metal hose is widely applied to the fields of metallurgy, petrochemical industry, aerospace and the like; in particular to an oil storage tank in the chemical industry, the settlement of the base of the oil storage tank, the multidirectional displacement caused by expansion and contraction between the oil storage tank and pipelines, and the earthquake in natural disasters can directly influence the safety of the medium transmission process in the oil storage tank.

Therefore, the flexible connection between the oil storage tank and the pipeline is mostly connected by adopting a metal hose, but when the metal hose in the prior art encounters severe vibration generated by earthquake or human and corresponding vibration of the oil storage tank in equipment along with the operation of machinery, the welding part of the connecting pipe in the hose and the corrugated pipe is twisted until broken due to defects, so that the use effect and the service life are seriously influenced.

Fig. 1-2 show a metal hose of the type commonly used in the prior art, which has the following problems:

1. when the connecting pipe 1 'and the corrugated pipe 3' are welded together, the connecting pipe 1 'needs to be flared, and then is subjected to secondary finish machining to enable the connecting pipe to be welded together when the size of the connecting pipe is the same as the outer diameter of the corrugated pipe 3'. The processing mode ensures that residual stress is easy to generate after the pipe joint 1' is flared, if the heat treatment effect is poor, the hardness of the conical steel pipe is higher, flaring cracks are easy to generate in the subsequent processing process, and unqualified products are generated.

2. The connecting pipe 1 'after flaring needs to be continuously finished, so that the pipe diameter of the connecting pipe 1' is smaller if the pipe diameter of the hose is smaller, the hardness of the flaring part of the steel pipe is higher when the number of subsequent processing passes is larger, and the probability of cracks generated in the flaring is increased.

3. The pipe wall of the connecting pipe 1 'after flaring is thinned, the connecting pipe is welded with the corrugated pipe 3', the welding line is narrow and small, the penetration value is small, more impurities are gathered at the center of the welding line due to regional segregation, the thermal crack resistance is poor, a weak point is formed at the position, and potential safety hazards are caused in the working process of the hose.

4. After the connecting pipe 1 ' is welded with the corrugated pipe 3 ', the welding ring 2 ', the metal hose net cover 4 ' and the sheath 5 ' are welded in an overlapping way, the welding times are more, and the strength and the rigidity are difficult to ensure.

Disclosure of Invention

The utility model provides a novel anti-seismic metal hose, aiming at solving the problems that in the prior art, the residual stress is more due to the fact that a connecting pipe is processed for many times, and the welding position is damaged firstly when the hose bears the vibration in a system due to the fact that the welding point is weak and the strength is insufficient, so that accidents and property loss are caused due to the fact that the hose is damaged, and the like.

The anti-seismic metal hose comprises connecting pipes, a corrugated pipe, a metal hose net sleeve and a sheath, wherein two ends of the corrugated pipe are respectively connected with one connecting pipe, the wall thickness of one end of the connecting pipe connected with the corrugated pipe is larger than that of the main body part of the connecting pipe, an annular groove is formed in the connecting pipe, the metal hose net sleeve is sleeved on the corrugated pipe and the part with the increased wall thickness of the corrugated pipe, and the sheath is arranged at the position, relative to the increased wall thickness of the connecting pipe, of the metal hose net sleeve.

As a further technical improvement, the outer diameter of the wall thickness increasing part of the connecting pipe is the same as the diameter of the wave crest of the corrugated pipe, so that the hose net sleeve can be tightly attached to the corrugated pipe after the hose net sleeve is welded on the wall thickness increasing part.

Because the welding seam surplus height generated when the connecting pipe is welded with the metal hose net cover in the production process can enable the welding position to be raised, and the hose net cover needs to be attached to the corrugated pipe and cannot be folded and twisted, as a further technical improvement, the annular groove is designed into a trapezoidal groove or a V-shaped groove with a wide upper part and a narrow lower part, so that molten metal generated in the welding process can be conveniently introduced into the trapezoidal groove or the V-shaped groove, and the phenomenon that the molten metal is not uniform in volume and overflows due to the fact that the molten metal is not uniform in volume in the welding process is avoided; thereby the laminating of hose net cover and bellows is fine assurance.

The utility model has advanced structure design, easy processing, good thermal crack resistance, higher strength of welding parts, no stress concentration, capability of absorbing vibration, thermal expansion and reciprocating motion in a severe working environment and good anti-seismic performance. The settlement of the compensation oil tank foundation that can have very much and the multidirectional displacement that the expend with heat and contract with cold produced between the pipeline and play the cushioning effect, can also the noise reduction, be applied to the junction of the oil storage tank of petrochemical industry and pipeline, the security performance is high, long service life.

Drawings

FIG. 1 is a schematic view of a prior art metal hose construction;

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

in fig. 1 and 2, 1 ' is a connecting pipe 2 ', a welding ring 3 ', a corrugated pipe 4 ', a metal hose net 5 ' and a sheath.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is an enlarged view of a portion B of fig. 3.

Fig. 5 is a partially enlarged view of a portion B of fig. 3 after the bellows and the adapter tube are welded.

In fig. 3 to 5, 1 is a connecting pipe, 2 is a corrugated pipe, 3 is a metal hose net cover, 4 is a protective sleeve, 5 is a ring groove, and 6 is a welding line.

Detailed Description

Referring to fig. 3 to 5, the anti-seismic metal hose of this embodiment is composed of a connection pipe, a corrugated pipe, a metal hose net and a sheath, wherein two ends of the corrugated pipe are respectively connected with one connection pipe in a welding manner, the wall thickness of one end of the connection pipe connected with the corrugated pipe is greater than that of the main body of the connection pipe, the outer diameter of the wall thickness increasing part of the connection pipe is the same as the diameter of the wave crest of the corrugated pipe, and an annular groove with a trapezoidal cross section and a wide upper part and a narrow lower part is formed on the outer pipe wall of the wall thickness increasing part of the connection pipe. The metal hose net sleeve is sleeved on the corrugated pipe and the part with the increased wall thickness of the corrugated pipe in a welding mode, and the sheath is fixed at the position, relative to the increased wall thickness of the connecting pipe, of the metal hose net sleeve in a welding mode.

The connecting pipe is equivalent to the integrated design of the connecting pipe and the welding ring in the prior art, is formed by directly and finely machining a thick-wall pipe, has no subsequent multi-pass machining, reduces the complex workload, does not need flaring, can directly and finely machine the outer diameter of the connecting pipe to the required size, and eliminates the damage of cracks after flaring; the thick pipe wall has the advantages of thick pipe wall, wide welding line after welding, moderate fusion depth value, good thermal crack resistance, high strength of welding position, capability of absorbing vibration, thermal expansion and reciprocating motion in severe working environment and good anti-seismic performance.

Furthermore, because the outer pipe wall of the part with the increased wall thickness of the connecting pipe is provided with the micro ring groove with the trapezoid or V-shaped section, when the corrugated pipe 2 and the connecting pipe 1 are welded, molten metal can be filled into the ring groove 5 (see figure 5), the residual height of the formed welding line 6 is in a proper range, the cross section of the welding line 6 is increased, the bearing capacity is improved, and the proper residual height can not cause stress concentration at the welding toe, so that the strength and the rigidity are increased, and the connecting pipe is not damaged, deformed and unstable under the vibration working environment.

Claims

1. The anti-seismic metal hose consists of connecting pipes, a corrugated pipe, a metal hose net sleeve and a sheath, wherein two ends of the corrugated pipe are respectively connected with one connecting pipe.

2. An earthquake-resistant metal hose according to claim 1, wherein the outer diameter of the wall-thickness-increasing portion of the nipple is the same as the diameter of the wave crest of the corrugated tube.

3. An earthquake-resistant metal hose according to claim 1, wherein the ring groove is a trapezoidal groove or a V-shaped groove having a wide upper portion and a narrow lower portion.