CN214331860U - Three-section structure for preventing lining of corrugated expansion joint from cracking - Google Patents
Three-section structure for preventing lining of corrugated expansion joint from cracking Download PDFInfo
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- CN214331860U CN214331860U CN202022919907.1U CN202022919907U CN214331860U CN 214331860 U CN214331860 U CN 214331860U CN 202022919907 U CN202022919907 U CN 202022919907U CN 214331860 U CN214331860 U CN 214331860U
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Abstract
The utility model discloses a three-section structure for preventing the lining of a corrugated expansion joint from cracking, which comprises a straight pipe section and corrugated pipe sections arranged at the two ends of the straight pipe section, wherein the inner sides of the straight pipe section and the corrugated pipe sections are provided with lining layers; the straight tube section with the bellows section is radially outwards extended and is connected through backing ring and fastener in the junction, or the straight tube section with the bellows section is connected through flange, backing ring and fastener in the junction, the inner ring radius of backing ring is greater than at least the external diameter of inner liner, in order to provide the deformation space of inner liner, makes the deformation segmentation of inner liner takes place. The utility model discloses a three-section structure makes the deformation of straight tube section, ripple pipeline section not transmit the influence each other, makes the deformation of the inboard inner liner of straight tube section not transmit ripple pipeline section part very much, can avoid the deformation of inner liner ripple part to break, guarantees the expansion joint safe operation.
Description
Technical Field
The utility model relates to a pipeline expansion compensation technical field especially relates to a prevent cracked three-section structure of ripple expansion joint inside lining.
Background
The pipeline engineering technology is an important technology in petrochemical engineering, and the expansion joint with the lining corrugated expansion is widely used in pipelines of petrochemical devices.
The expansion joint in the structural form of the large pull rod and the small pull rod has the characteristics of larger length, strong compensation capability and particularly wide application. For the medium with stronger corrosivity, only the expansion joint made of corrosion-resistant noble metal material can be used, or the inner liner made of PTFE material is added on the inner wall of the 304 stainless steel expansion joint to solve the problem of medium corrosion.
The structural form of the large pull rod and the small pull rod expansion joint is 'metal corrugated pipes with short two ends + metal straight pipe sections with long middle parts', and the metal corrugated pipes and the metal straight pipe sections are welded into an integral structure. The structure of the lining layer is completely consistent with that of the metal expansion joint, and the lining layer is also of an integral structure and keeps fit with the metal corrugated pipe and the metal straight pipe section.
Because the expansion joint made of noble metal materials is difficult to manufacture and expensive, the expansion joint made of 304 stainless steel and PTFE lining is more reasonable in engineering. However, for the expansion joint in the structural form of a large pull rod and a small pull rod which is widely used in engineering, the deformation of the middle straight pipe of the lining layer is large, and the deformation can be directly transmitted to the corrugated parts at the two ends of the lining layer.
Fig. 1 shows a schematic diagram of the deformation of the expansion joint of a common lining structure. In the operating state, the temperature of the entire expansion joint varies with the medium temperature, which can reach up to 120 ℃. Because the expansion coefficient of the lining material is larger than that of the expansion joint of the metal material, the expansion amount of the lining layer along the axial direction is obviously larger than that of the metal outer layer of the expansion joint. The expansion of the lining material of the middle straight tube section of the expansion joint is greater than that of the straight metal tube section 2 Deltax 1 and is directly transmitted to the innermost corrugation at the two ends by Deltax 1. Since the corrugation is the weakest link of the overall expansion joint, the excess deformation Δ x1 of the liner, coupled with other deformations of the expansion joint itself, can easily rupture the two corrugations of the liner, rendering the expansion joint unusable.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, to the expansion joint of big pull rod, little pull rod structural style, the utility model provides a prevent cracked three-section structure of ripple expansion joint inside lining adopts the deformation that three-section structure made straight tube section, ripple pipeline section not to transmit the influence each other, makes the deformation of the inboard inner liner of straight tube section not transmit ripple pipeline section part very much, can avoid the deformation of inner liner ripple part to break, guarantees the expansion joint safe operation.
The utility model discloses a three-section structure for preventing the lining of the corrugated expansion joint from cracking, which comprises a straight pipe section and corrugated pipe sections arranged at the two ends of the straight pipe section, wherein the inner sides of the straight pipe section and the corrugated pipe sections are provided with lining layers; the straight tube section with the bellows section is radially outwards extended and is connected through backing ring and fastener in the junction, or the straight tube section with the bellows section is connected through flange, backing ring and fastener in the junction, the inner ring radius of backing ring is greater than at least the external diameter of inner liner, in order to provide the deformation space of inner liner, makes the deformation segmentation of inner liner takes place.
Further, the radius of the inner ring of the backing ring is larger than the outer diameters of the straight pipe section and the corrugated pipe section, so that deformation spaces of the straight pipe section, the corrugated pipe section and the lining layer are provided.
Further, the axes of the backing ring, the straight pipe section, the corrugated pipe section and the lining layer are on the same straight line.
Furthermore, the two sides of the backing ring, the inner side of the straight pipe section, the inner side of the corrugated pipe section and the inner side and the outer side of the lining layer are smooth surfaces.
Further, the backing ring and the inner lining layer are made of the same or similar materials.
Further, the difference between the inner ring radius of the backing ring and the inner diameter of the inner lining layer is larger than or equal to ten millimeters.
Further, when the length of the straight pipe section is less than or equal to two meters, the thickness of the backing ring is set to be more than or equal to four millimeters.
Further, when the length of the straight pipe section is more than two meters, the thickness of the backing ring is increased in proportion.
The beneficial effects of the utility model reside in that:
the expansion joint of the utility model adopts a three-section structure, so that the deformation of the straight pipe section and the corrugated pipe section is not mutually transmitted and influenced, in particular, the deformation of the inner liner layer at the inner side of the straight pipe section is not transmitted to the corrugated pipe section part, the deformation and the breakage of the corrugated part of the inner liner layer can be avoided, and the safe operation of the expansion joint is ensured; the expansion joint is divided into three sections, so that the length of each section of lining layer is reduced, and the deformation of the lining layer is reduced;
the straight pipe section and the corrugated pipe section of the expansion joint extend outwards along the radial direction at the joint and are connected with the fastening piece through the backing ring, or the straight pipe section and the corrugated pipe section are directly connected with each other at the joint through the flange, the backing ring and the fastening piece, the radius of the inner ring of the backing ring is at least larger than the outer diameter of the lining layer, so that a deformation space of the lining layer can be provided, and the deformation of the lining layer is generated in sections without mutual influence; the backing ring also ensures a good seal between the straight and corrugated sections.
Drawings
FIG. 1 is a schematic representation of a deformation of an expansion joint of a conventional liner construction;
FIG. 2 is a schematic diagram of a three-stage structure of the present invention for preventing the cracking of the lining of the corrugated expansion joint;
FIG. 3 is a detail view of detail B of FIG. 2;
FIG. 4 is a view A-A of FIG. 2;
FIG. 5 is a schematic view of the expansion joint according to the present invention;
reference numerals: 1-straight pipe section, 2-corrugated pipe section, 3-lining layer, 4-backing ring, 5-fastener and 6-expansion joint pull rod; l1-the length of the corrugated pipe section, L2-the length of the straight pipe section, t-the thickness of the backing ring, h-the difference between the radius of the inner ring of the backing ring and the inner diameter of the lining layer, R1-the inner diameter of the lining layer, and R2-the radius of the inner ring of the backing ring.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a prevent cracked three-section structure of ripple expansion joint inside lining, as shown in fig. 2, including straight tube section 1 and set up in the ripple pipeline section 2 at straight tube section 1 both ends, the inboard of straight tube section 1 and ripple pipeline section 2 is provided with inner liner 3. As shown in fig. 3 and 4, the straight pipe section 1 and the corrugated pipe section 2 extend outwards in the radial direction at the joint and are connected through a backing ring 4 and a fastener 5, and the inner ring radius R2 of the backing ring 4 is at least larger than the outer diameter of the lining layer 3 so as to provide a deformation space of the lining layer 3, so that the deformation of the lining layer 3 can be segmented without mutual influence. The grommet 4 also ensures a good seal between the straight pipe section 1 and the corrugated pipe section 2. Alternatively, the straight pipe section 1 and the corrugated pipe section 2 may be directly connected at the connection by a flange, a grommet 4 and a fastener 5.
As shown in fig. 5, the deformation of the expansion joint of the present invention is schematically illustrated, when the expansion joint is deformed in a working state, the excessive expansion amount of the inner liner 3 inside the straight pipe section 1 of the expansion joint will only occur at the subsection, i.e. Δ x in fig. 5, and will not be transmitted to the corrugated pipe section 2 of the expansion joint, so that the rupture of the inner liner 3 of the expansion joint will not be caused, thereby ensuring the long-term normal use of the expansion joint.
In a preferred embodiment of the present invention, the inner ring radius R2 of the backing ring 4 is larger than the outer diameters of the straight pipe section 1 and the bellows section 2 to provide a deformation space for the straight pipe section 1, the bellows section 2 and the inner liner 3.
In a preferred embodiment of the present invention, the axes of the backing ring 4, the straight pipe section 1, the bellows section 2 and the inner liner 3 are on the same straight line.
In a preferred embodiment of the present invention, both sides of the backing ring 4, the inner side of the straight pipe section 1, the inner side of the bellows section 2, and both sides of the inner liner 3 are smooth surfaces.
In a preferred embodiment of the present invention, the material of the backing ring 4 is the same as or similar to that of the inner liner 3.
In a preferred embodiment of the present invention, as shown in fig. 3, the difference h between the inner ring radius R2 of the backing ring 4 and the inner diameter R1 of the inner liner 3 is greater than or equal to ten millimeters.
In a preferred embodiment of the present invention, when the length L2 of the straight pipe section 1 is two meters or less, the thickness t of the grommet 4 is set to four millimeters or more. Furthermore, when the length L2 of the straight tube section 1 is more than two meters, the thickness t of the grommet 4 increases proportionally.
To sum up, the utility model discloses an expansion joint adopts the three-section structure, makes straight tube section 1, bellows section 2's deformation not transmit the influence each other, makes the deformation of the inboard inner liner 3 of straight tube section 1 not transmit bellows section 2 parts very much, can avoid the deformation of the 3 corrugated parts of inner liner to break, guarantees the expansion joint safe operation. In addition, the expansion joint is divided into three sections, so that the length of each section of the lining layer 3 is reduced, and the deformation is reduced.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the present invention is directed must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either a wired or wireless connection.
Claims (8)
1. A three-section structure for preventing the lining of a corrugated expansion joint from cracking is characterized by comprising a straight pipe section and corrugated pipe sections arranged at two ends of the straight pipe section, wherein lining layers are arranged on the inner sides of the straight pipe section and the corrugated pipe sections; the straight tube section with the bellows section is radially outwards extended and is connected through backing ring and fastener in the junction, or the straight tube section with the bellows section is connected through flange, backing ring and fastener in the junction, the inner ring radius of backing ring is greater than at least the external diameter of inner liner, in order to provide the deformation space of inner liner, makes the deformation segmentation of inner liner takes place.
2. The three-section structure for preventing the lining of the corrugated expansion joint from cracking as claimed in claim 1, wherein the radius of the inner ring of the backing ring is larger than the outer diameters of the straight pipe section and the corrugated pipe section so as to provide deformation spaces for the straight pipe section, the corrugated pipe section and the lining layer.
3. The three-section structure for preventing the lining of the corrugated expansion joint from cracking as claimed in claim 1, wherein the axes of the backing ring, the straight pipe section, the corrugated pipe section and the lining layer are on the same straight line.
4. The three-section structure for preventing the lining of the corrugated expansion joint from cracking as claimed in claim 1, wherein both sides of the backing ring, the inner side of the straight pipe section, the inner side of the corrugated pipe section, and both the inner side and the outer side of the lining layer are smooth surfaces.
5. The three-stage structure for preventing the lining of the corrugated expansion joint from cracking as claimed in claim 1, wherein the backing ring and the lining layer are made of the same or similar materials.
6. The three-stage structure for preventing the lining of the corrugated expansion joint from cracking as claimed in any one of claims 1 to 5, wherein the difference between the radius of the inner ring of the backing ring and the inner diameter of the lining layer is greater than or equal to ten mm.
7. The three-section structure for preventing the lining of the corrugated expansion joint from cracking as claimed in any one of claims 1 to 5, wherein when the length of the straight pipe section is less than or equal to two meters, the thickness of the backing ring is set to be greater than or equal to four millimeters.
8. The three-stage structure for preventing the lining of the corrugated expansion joint from cracking as claimed in claim 7, wherein when the length of the straight pipe section is more than two meters, the thickness of the backing ring is increased proportionally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022919907.1U CN214331860U (en) | 2020-12-08 | 2020-12-08 | Three-section structure for preventing lining of corrugated expansion joint from cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022919907.1U CN214331860U (en) | 2020-12-08 | 2020-12-08 | Three-section structure for preventing lining of corrugated expansion joint from cracking |
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| Publication Number | Publication Date |
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| CN214331860U true CN214331860U (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022919907.1U Active CN214331860U (en) | 2020-12-08 | 2020-12-08 | Three-section structure for preventing lining of corrugated expansion joint from cracking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
-
2020
- 2020-12-08 CN CN202022919907.1U patent/CN214331860U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
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