CN112032450A - Novel high-strength low-rigidity metal expansion joint - Google Patents
Novel high-strength low-rigidity metal expansion joint Download PDFInfo
- Publication number
- CN112032450A CN112032450A CN202010719298.7A CN202010719298A CN112032450A CN 112032450 A CN112032450 A CN 112032450A CN 202010719298 A CN202010719298 A CN 202010719298A CN 112032450 A CN112032450 A CN 112032450A
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- China
- Prior art keywords
- corrugated pipe
- expansion joint
- gasket
- reinforcing ring
- flange
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a novel high-strength low-rigidity metal expansion joint which comprises a multilayer corrugated pipe, a flange, a gasket and a reinforcing ring, wherein the multilayer corrugated pipe comprises four layers of wave plates, and each layer of wave plate is tightly connected; the end face of the flange is fixedly connected with the end face of the multilayer corrugated pipe, the reinforcing ring is arranged at the joint of the flange and the multilayer corrugated pipe, a gap is reserved between the reinforcing ring and the corrugated pipe along the axial direction, and the gap is controlled by the gasket during processing and assembling. The invention improves the strength performance of the expansion joint and reduces the integral rigidity of the expansion joint.
Description
Technical Field
The invention relates to the technical field of expansion joints, in particular to a novel high-strength low-rigidity metal expansion joint.
Background
As an elastic compensation element capable of freely stretching, the bellows expansion joint has the advantages of reliable work, good performance, compact structure and the like, and is widely applied to various fields of petrifaction, steel, gas, food, medicine, building, aerospace, nuclear power and the like. The expansion joint of the corrugated pipe is used as a thermal compensation and displacement compensation element in a pressure vessel and a pipeline system, and the main body of the expansion joint of the corrugated pipe is a metal corrugated pipe. It is an elastomer consisting of one or several thin-walled bellows with sufficient strength. The corrugated pipe can be divided into a single-layer corrugated pipe and a multi-layer corrugated pipe according to the layer number of the pipe wall; according to the form of corrugated distribution, the corrugated pipe can be divided into an annular corrugated pipe and a spiral corrugated pipe; according to the waveform, the wave-shaped wave; according to the ratio of the inner diameter to the outer diameter of the corrugation, the corrugated pipe can be divided into a deep corrugated pipe and a shallow corrugated pipe. According to the processing technique, the method can be divided into mechanical expansion type, hydraulic forming, welding forming, electro-deposition forming and the like. The expansion of the corrugated pipe can play a role of expansion and contraction, and is mainly realized by the corrugated pipe. Bellows expansion joints can be divided into 7 types according to their function: a unitary expansion joint; a compound expansion joint; a pressure balance type expansion joint of the bent pipe; a straight pipe pressure balance type expansion joint; a universal expansion joint; a hinged expansion joint; universal hinge type expansion joint.
With the expansion of industrial production scale, the expansion joint of the corrugated pipe is gradually enlarged, the structure is also gradually complicated, the working environment is more and more complicated, and the working pressure and the working environment temperature of the metal expansion joint are also continuously improved. At present, in order to better improve the strength performance of a metal expansion joint, particularly for a large-caliber metal corrugated pipe expansion joint, a mode of welding a reinforcing ring is often adopted to improve the bearing capacity of the expansion joint. But because the reinforcing ring is contacted with the corrugated pipe tightly during welding,
when the reinforcing ring restrains the displacement of the corrugated pipe, the corrugated pipe and the reinforcing ring easily generate larger extrusion stress to reduce the strength of the corrugated pipe due to the internal pressure action of the corrugated pipe, and meanwhile, the elastic performance of the corrugated pipe is greatly reduced, and the rigidity is increased.
Therefore, it is necessary to provide a new expansion joint which can reduce the stiffness of the bellows and improve the elastic displacement compensation capability while exerting the strength performance of the reinforced bellows expansion joint.
Disclosure of Invention
The invention aims to solve the problems that: the novel high-strength low-rigidity metal expansion joint improves the strength performance of the expansion joint and reduces the integral rigidity of the expansion joint.
The technical scheme provided by the invention for solving the problems is as follows: a novel high-strength low-rigidity metal expansion joint comprises a multilayer corrugated pipe, a flange, a gasket and a reinforcing ring, wherein the multilayer corrugated pipe comprises four layers of wave plates, and each layer of wave plate is tightly connected; the end face of the flange is fixedly connected with the end face of the multilayer corrugated pipe, the reinforcing ring is arranged at the joint of the flange and the multilayer corrugated pipe, a gap is reserved between the reinforcing ring and the corrugated pipe along the axial direction, and the gap is controlled by the gasket during processing and assembling.
Preferably, the gasket is of a semicircular structure, and the section of the gasket is L-shaped.
Preferably, the gasket has various types according to the thickness.
Preferably, the gap is a gradually transitional wedge shape, and the outer opening is the largest.
Compared with the prior art, the invention has the advantages that: when the multilayer corrugated pipe is connected with the reinforcing ring, gaps exist among the reinforcing ring, the corrugated pipe ring plate and the wave trough through the use of the gasket, and the reinforcing ring and the corrugated pipe are reserved with the gaps, so that the elastic rigidity is effectively reduced while the strength of the corrugated pipe is improved by the reinforcing ring, and the displacement compensation capacity of the reinforced expansion joint is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural view of the expansion joint of the novel metal corrugated pipe of the present invention;
fig. 2 is a cross-sectional view of the novel metal bellows expansion joint of the present invention.
The attached drawings are marked as follows: 1. multilayer bellows, 2, gasket, 3, strengthening ring, 4, flange.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
The embodiment of the invention is shown in fig. 1 and fig. 2, and the novel high-strength low-rigidity metal expansion joint comprises a multilayer corrugated pipe, a flange, a gasket and a reinforcing ring, wherein the multilayer corrugated pipe comprises four layers of wave plates, and each layer of wave plates are tightly connected; the end face of the flange is fixedly connected with the end face of the multilayer corrugated pipe, the reinforcing ring is arranged at the joint of the flange and the multilayer corrugated pipe, a gap is reserved between the reinforcing ring and the corrugated pipe along the axial direction, and the gap is controlled by the gasket during processing and assembling.
The reinforcing ring 3 and the flange 4 can be integrally processed or can be independently arranged, the flange 4 is provided with bolt holes, and the flange 4 can be restrained and fixed through bolt connection. The flange 4 is fixedly connected with the multilayer corrugated pipe 1 after being connected with the reinforcing ring 3. The flange 4 and the multilayer corrugated pipe 1 are connected in a manner that the end face of the flange 4 is fixedly connected with the end face of the multilayer corrugated pipe 1. When the reinforcing ring 3 is connected with the multilayer corrugated pipe 1, the gasket is embedded between the reinforcing ring 3 and the ring plate of the multilayer corrugated pipe 1. The structure of the gasket 2 is a semicircular structure, and each end is provided with two gaskets to form a circle. The gasket 2 can have various thickness models to adapt to different clearance values and can be selected according to the working condition of the expansion joint. And (3) removing the gasket after the reinforcing ring 3 is connected with the multilayer corrugated pipe 1, wherein the reinforcing ring 3 and the multilayer corrugated pipe 1 form a smoothly-transited wedge-shaped gap, and the maximum value of the gap is equal to the thickness of the thin gasket 2. Namely, the gap between the reinforcing ring 3 and the multilayer corrugated pipe 1 can be adjusted and controlled by selecting gaskets 2 with different thicknesses.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (4)
1. The utility model provides a novel low rigidity metal expansion joint of high strength which characterized in that: the corrugated pipe comprises a plurality of layers of corrugated pipes, a flange, a gasket and a reinforcing ring, wherein the plurality of layers of corrugated pipes comprise four layers of wave plates, and each layer of wave plate is tightly connected; the end face of the flange is fixedly connected with the end face of the multilayer corrugated pipe, the reinforcing ring is arranged at the joint of the flange and the multilayer corrugated pipe, a gap is reserved between the reinforcing ring and the corrugated pipe along the axial direction, and the gap is controlled by the gasket during processing and assembling.
2. The novel high-strength low-rigidity metal expansion joint as claimed in claim 1, wherein: the gasket is of a semicircular structure, and the cross section of the gasket is L-shaped.
3. The novel high-strength low-rigidity metal expansion joint as claimed in claim 1, wherein: the gasket has various models according to the thickness.
4. The novel high-strength low-rigidity metal expansion joint as claimed in claim 1, wherein: the gap is in a wedge shape with gradual transition, and the opening at the outer side is the largest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719298.7A CN112032450A (en) | 2020-07-23 | 2020-07-23 | Novel high-strength low-rigidity metal expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719298.7A CN112032450A (en) | 2020-07-23 | 2020-07-23 | Novel high-strength low-rigidity metal expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112032450A true CN112032450A (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010719298.7A Pending CN112032450A (en) | 2020-07-23 | 2020-07-23 | Novel high-strength low-rigidity metal expansion joint |
Country Status (1)
| Country | Link |
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| CN (1) | CN112032450A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB836209A (en) * | 1955-11-25 | 1960-06-01 | Badger Mfg Company | Improvements in expansion joints for pipe lines |
| DE1958137A1 (en) * | 1969-11-19 | 1971-05-27 | Rudolf Stender Kg | Elastic pipe connection |
| FR2471525A1 (en) * | 1979-12-03 | 1981-06-19 | Doryokuro Kakunenryo | Expansion joints esp. for reactor cooling systems - comprise concertina-tubes reinforced by steel rings |
| US4717181A (en) * | 1985-08-30 | 1988-01-05 | Agintec Ag | Elastic pipe connector |
| EP0445544A2 (en) * | 1990-03-07 | 1991-09-11 | Pirelli Sistemi Antivibranti S.P.A. | Flexible expansion joint for piping and process to manufacture the same |
| JP2002323186A (en) * | 2001-04-24 | 2002-11-08 | A & A Material Corp | Expansion joint |
| US20040051310A1 (en) * | 2002-07-27 | 2004-03-18 | Andreas Fleck | Flexible pipe connecting unit |
| CN110701412A (en) * | 2019-10-17 | 2020-01-17 | 长沙东屋机电有限责任公司 | Sub-rigid body structure expansion joint of pressure steel pipe of hydropower station |
-
2020
- 2020-07-23 CN CN202010719298.7A patent/CN112032450A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB836209A (en) * | 1955-11-25 | 1960-06-01 | Badger Mfg Company | Improvements in expansion joints for pipe lines |
| DE1958137A1 (en) * | 1969-11-19 | 1971-05-27 | Rudolf Stender Kg | Elastic pipe connection |
| FR2471525A1 (en) * | 1979-12-03 | 1981-06-19 | Doryokuro Kakunenryo | Expansion joints esp. for reactor cooling systems - comprise concertina-tubes reinforced by steel rings |
| US4717181A (en) * | 1985-08-30 | 1988-01-05 | Agintec Ag | Elastic pipe connector |
| EP0445544A2 (en) * | 1990-03-07 | 1991-09-11 | Pirelli Sistemi Antivibranti S.P.A. | Flexible expansion joint for piping and process to manufacture the same |
| JP2002323186A (en) * | 2001-04-24 | 2002-11-08 | A & A Material Corp | Expansion joint |
| US20040051310A1 (en) * | 2002-07-27 | 2004-03-18 | Andreas Fleck | Flexible pipe connecting unit |
| CN110701412A (en) * | 2019-10-17 | 2020-01-17 | 长沙东屋机电有限责任公司 | Sub-rigid body structure expansion joint of pressure steel pipe of hydropower station |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20201204 |