CN211925122U

CN211925122U - Compound pull rod type ETFE coating composite expansion joint

Info

Publication number: CN211925122U
Application number: CN201920714778.7U
Authority: CN
Inventors: 卢勇
Original assignee: Jiangsu Suchuang Pipe Industry Technology Co ltd
Current assignee: Jiangsu Suchuang Pipe Industry Technology Co ltd
Priority date: 2019-05-19
Filing date: 2019-05-19
Publication date: 2020-11-13
Anticipated expiration: 2029-05-19

Abstract

The utility model discloses a compound expansion joint of double entry pull rod type ETFE coating relates to expansion joint technical field. The utility model discloses a corrugated metal pipe and intervalve, corrugated metal pipe's one end and intervalve's both ends all are equipped with the flange, and the inside both ends of intervalve all fix corrugated metal pipe, and corrugated metal pipe internal surface is scribbled and is equipped with the ETFE coating, and corrugated metal pipe and intervalve are through the regulation pull rod fixed connection that resets that runs through the flange. The expansion joint is more convenient to adjust by matching the reset adjusting pull rod and the metal corrugated pipe, the stress at the joint of the two ends of the reset adjusting pull rod is ensured to be uniform, and the end surface and the inner surface of the metal corrugated pipe are provided with the ETFE coating, so that the service life is prolonged; through set up the sealed first sealed section of thick bamboo of pegging graft each other and the sealed second sealed section of thick bamboo at bellows both ends, be convenient for with the pipe connection to can prevent that liquid from directly contacting with the bellows, improve the leakproofness of expansion joint, reduce the corruption.

Description

Compound pull rod type ETFE coating composite expansion joint

Technical Field

The utility model belongs to the technical field of the expansion joint, especially, relate to a compound expansion joint of double entry pull rod type ETFE coating.

Background

An expansion joint refers to a flexible element that effectively functions to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and easy deformation, can compensate the thermal expansion difference generated by the tube and the shell due to different wall temperatures, and reduces the axial load of the tube and the shell, thereby reducing the temperature difference stress of the tube, the tube plate and the shell and avoiding causing strength damage, instability damage and tube pull-out damage. The expansion joint has many kinds, and the common structures include wave, ring plate welding, clamping shell type and the like, wherein the wave expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions.

At present, the compound pull rod type expansion joint is composed of two corrugated pipes connected by a middle pipe, a pull rod, a flange, a gasket and other structural members, and can absorb transverse displacement in any plane and bear the pressure thrust of the corrugated pipes. The existing compound pull rod type expansion joint is poor in sealing performance, easy to cause leakage and harm to the surrounding environment and personnel, poor in corrosion resistance and short in service life, and meanwhile, the existing compound pull rod type expansion joint is inconvenient to adjust by a pull rod in the using process, uneven in stress of the expansion joint is easy to cause, and the service life of the expansion joint is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compound expansion joint of double entry pull rod type ETFE coating, it is relatively poor to have solved current double entry pull rod type expansion joint leakproofness, causes the leakage easily, causes the injury to surrounding environment and personnel to the expansion joint corrosion resistance is poor, and the life-span is shorter, the inconvenient problem of adjusting.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a compound pull rod type ETFE coating composite expansion joint of double entry, including corrugated metal pipe and intermediate pipe, corrugated metal pipe's one end and the both ends of intermediate pipe all are equipped with the flange, the equal fixed corrugated metal pipe in intermediate pipe inside both ends, corrugated metal pipe internal surface is scribbled and is equipped with ETFE (ethylene and tetrafluoroethylene's copolymer) coating, corrugated metal pipe and intermediate pipe are through the regulation pull rod fixed connection that resets that runs through the flange.

The flange end of one metal corrugated pipe is fixed with a first sealing cylinder, the flange end of the other metal corrugated pipe is fixed with a second sealing cylinder, and the ends of the joints of the first sealing cylinder and the second sealing cylinder are provided with insertion parts which are matched with each other.

The reset adjusting pull rod comprises a threaded rod, and one end of the threaded rod is in threaded connection with a threaded sleeve.

Furthermore, the outer ends of the first sealing cylinder and the second sealing cylinder are provided with flange flanges connected with the metal corrugated pipe.

Furthermore, a pipeline with a flange is fixed at the flange end of the metal corrugated pipe, and a sealing gasket is arranged between the flange end of the metal corrugated pipe and the flange end of the pipeline.

Furthermore, a telescopic gap is reserved between the insertion parts connected with the first sealing cylinder and the second sealing cylinder.

The utility model discloses following beneficial effect has:

1. the utility model discloses an adjustment pull rod, corrugated metal pipe's cooperation that resets is used for this expansion joint is adjusted more conveniently, guarantees that the adjustment pull rod both ends junction atress that resets is even, and corrugated metal pipe terminal surface and internal surface are equipped with the ETFE coating, have improved life.

2. The utility model discloses a set up the sealed first sealed section of thick bamboo of pegging graft each other and the sealed section of thick bamboo of second at bellows both ends, be convenient for with the pipe connection to can prevent that liquid from direct and bellows contact, improve the leakproofness of expansion joint, reduce the corruption.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the compound tie rod type ETFE coating composite expansion joint of the present invention;

FIG. 2 is a schematic view of a portion A of FIG. 1;

fig. 3 is a schematic structural view of the first sealing cylinder and the second sealing cylinder of the present invention;

fig. 4 is a schematic structural view of the adjusting pull rod for resetting.

In the drawings, the components represented by the respective reference numerals are listed below:

1-metal corrugated pipe, 2-middle pipe, 3-ETFE coating, 4-reset adjusting pull rod, 401-threaded rod, 402-threaded sleeve, 5-first sealing cylinder, 6-second sealing cylinder, 7-inserting part, 8-pipeline and 9-sealing washer.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention relates to a compound tie rod type ETFE coated composite expansion joint, which comprises a corrugated metal pipe 1 and an intermediate pipe 2, wherein one end of the corrugated metal pipe 1 and two ends of the intermediate pipe 2 are both provided with flange flanges, the corrugated metal pipe 1 is fixed at two ends inside the intermediate pipe 2, the inner surface of the corrugated metal pipe 1 is coated with an ETFE coating 3, the corrugated metal pipe 1 and the intermediate pipe 2 are fixedly connected by a reset adjusting tie rod 4 penetrating the flange flanges, the ETFE coating 3 has excellent heat-resistant and low temperature-resistant properties, can be continuously used at-50 ℃ to 260 ℃ generally, has significant thermal stability, can work at freezing temperature without embrittlement, can not melt at high temperature, and can hardly be corroded by any chemical reagent, can protect the corrugated metal pipe 1 from any kind of chemical corrosion, and has no water or oil on the surface, the cleaning agent is not easy to stick solution during production operation, and can be removed by simply wiping if a small amount of dirt is stuck.

A first sealing cylinder 5 is fixed at the flange end of one metal corrugated pipe 1, a second sealing cylinder 6 is fixed at the flange end of the other metal corrugated pipe 1, and the insertion parts 7 which are matched with each other are arranged at one end of the joint of the first sealing cylinder 5 and the second sealing cylinder 6.

Reset adjustment pull rod 4 includes threaded rod 401, and threaded sleeve 402 is connected to threaded rod 401 one end threaded connection, conveniently adjusts, and the part atress that reset adjustment pull rod 4 is connected is even.

Wherein, the outer ends of the first sealing cylinder 5 and the second sealing cylinder 6 are respectively provided with a flange connected with the metal corrugated pipe 1.

Wherein, the flange end of the metal corrugated pipe 1 is fixed with a pipeline 8 with a flange, and a sealing gasket 9 is arranged between the flange end of the metal corrugated pipe 1 and the flange end of the pipeline 8.

Wherein, a telescopic gap is reserved between the inserting part 7 connected with the first sealing cylinder 5 and the second sealing cylinder 6, and the axial deformation can be effectively compensated.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a compound expansion joint of double entry pull rod type ETFE coating, includes corrugated metal pipe (1) and intermediate pipe (2), the one end of corrugated metal pipe (1) and the both ends of intermediate pipe (2) all are equipped with flange, its characterized in that:

the corrugated metal pipe is characterized in that a corrugated metal pipe (1) is fixed at two ends inside the middle pipe (2), an ETFE coating (3) is coated on the inner surface of the corrugated metal pipe (1), and the corrugated metal pipe (1) and the middle pipe (2) are fixedly connected through a reset adjusting pull rod (4) penetrating through a flange;

a first sealing cylinder (5) is fixed at the flange end of one metal corrugated pipe (1), a second sealing cylinder (6) is fixed at the flange end of the other metal corrugated pipe (1), and insertion parts (7) which are matched with each other are arranged at one end of the joint of the first sealing cylinder (5) and the second sealing cylinder (6);

the reset adjusting pull rod (4) comprises a threaded rod (401), and one end of the threaded rod (401) is in threaded connection with a threaded sleeve (402).

2. The ETFE-coated composite expansion joint of compound pull rod type as claimed in claim 1, wherein the outer ends of the first sealing cylinder (5) and the second sealing cylinder (6) are provided with flange flanges connected with the metal corrugated pipe (1).

3. A compound tension rod type ETFE coated composite expansion joint according to claim 1, wherein a pipe (8) with a flange is fixed at the flange end of the metal bellows (1), and a sealing gasket (9) is provided between the flange end of the metal bellows (1) and the flange end of the pipe (8).

4. The ETFE-coated composite expansion joint with multiple tension rods as claimed in claim 1, wherein a telescopic gap is left between the insertion parts (7) connected with the first sealing cylinder (5) and the second sealing cylinder (6).