CN211821255U - Axial external pressure type expansion joint - Google Patents
Axial external pressure type expansion joint Download PDFInfo
- Publication number
- CN211821255U CN211821255U CN202020258034.1U CN202020258034U CN211821255U CN 211821255 U CN211821255 U CN 211821255U CN 202020258034 U CN202020258034 U CN 202020258034U CN 211821255 U CN211821255 U CN 211821255U
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- pipe
- corrugated pipe
- elastic rubber
- expansion joint
- external pressure
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Abstract
The utility model aims to provide an axial external pressure type expansion joint with simple structure, convenient use and strong compressive resistance, which comprises an outer pipe, a middle pipe, a sleeve pipe and a corrugated pipe, wherein the outer pipe is fixedly connected with the middle pipe, one end of the sleeve pipe is coaxially sleeved on the middle pipe, an annular sealing cavity is enclosed between the connecting ends of the sleeve pipe and the middle pipe, sealing filler is filled in the sealing cavity, the corrugated pipe is coaxially sleeved outside the outer pipe, one end of the corrugated pipe is fixedly connected with the middle pipe, the other end of the corrugated pipe is fixedly connected with the sleeve pipe, the corrugated pipe is provided with a wave peak part and a wave trough part which are connected with each other, the wave peak part and the wave trough part are both provided with elastic rubber rings which are embedded in the wave peak part from the inside and are sleeved in the wave trough part from the outside, an anti-falling structure is arranged between the elastic rubber ring and the corrugated pipe.
Description
Technical Field
The utility model relates to an external pressure type expansion joint specifically is an axial type external pressure type expansion joint.
Background
The external pressure axial expansion joint is mainly applied to displacement compensation of a long straight pipeline (pipeline transportation line), and the corrugated pipe in the expansion joint does not have the problem of column instability under the external pressure environment, so that the wave number of the corrugated pipe in the external pressure axial expansion joint is not limited, and the compensation of large displacement can be realized by setting more wave numbers. However, in an external pressure environment, the bellows in the expansion joint has a problem of circumferential buckling of the bellows, which is mainly characterized in that under external pressure, the wave crest of the bellows is collapsed by the compressive stress, the failure mode of the bellows is fatal, and once the wave crest of the bellows is collapsed, the expansion joint immediately loses the displacement compensation capacity, and a catastrophic result is often caused on a pipeline. In order to solve the problem in the prior art, a mode of reducing the pressure stress is generally adopted, namely, the pressure stress borne by the wave crest is in a lower level by increasing the thickness of the corrugated pipe. Such a solution causes an increase in the production cost of the bellows, and in particular for large-diameter expansion joints, because the required compressive stress is lower, under such conditions, the bellows element is often required to be thicker, and the corresponding production cost is also higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, convenient to use, the strong axial type external compression expansion joint of compressive resistance to solve the problem of proposing among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an axial type external pressure formula expansion joint, includes outer tube, intervalve, sleeve pipe and bellows, the outer tube with intervalve fixed connection, the coaxial cover of sheathed tube one end is located on the intervalve, the sleeve pipe with enclose into annular seal chamber between the link of intervalve, the packing has the sealing filler in the seal chamber, the coaxial cover of bellows is located the outside of outer tube, the one end of bellows with intervalve fixed connection, the other end of bellows with sleeve pipe fixed connection, the bellows has interconnect's crest portion and trough portion, crest portion and trough portion all are provided with elastic rubber ring, elastic rubber ring inlays by inside and locates the crest portion, elastic rubber ring is located by the outside cover the trough portion, elastic rubber ring with anti-disengaging structure has between the bellows.
As a further aspect of the present invention: the anti-disengaging structure comprises a limiting ring part which is integrally formed on the outer ring surfaces at two ends of the elastic rubber ring, and annular grooves for embedding the limiting ring part are formed in the crest part and the trough part.
As a further aspect of the present invention: an annular cavity is formed in the elastic rubber ring, the cross section of the annular cavity is oval, and the direction of a long half shaft of the cross section of the annular cavity is parallel to the telescopic direction of the corrugated pipe.
As a further aspect of the present invention: the corrugated pipe comprises a corrugated pipe body and is characterized by further comprising an outer protecting pipe, wherein the outer part of the corrugated pipe body is coaxially sleeved with the outer protecting pipe, one end of the outer protecting pipe is fixedly connected with the outer pipe, and the other end of the outer protecting pipe is provided with a through hole for the sleeve to pass through.
As a further aspect of the present invention: the pull rod is fixedly installed on the end wall of the outer protecting pipe, the pull rod is arranged around the through hole, lug plates are circumferentially arranged on the sleeve, and the pull rod penetrates through the lug plates in a sliding mode.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses simple structure, high durability and convenient use, all be provided with elastic rubber ring through the ripples peak part and the trough portion at the bellows, elastic rubber ring is inlayed by inside and is located the ripples peak part, elastic rubber ring locates the trough portion by outside cover, anti-disengaging structure has between elastic rubber ring and the bellows, thereby can cushion the compressive force that receives of bellows, reduce the bearing capacity portion of bellows simultaneously, avoid ripples peak part or trough portion to be collapsed, guarantee the normal operating of pipeline, can provide the resilience force for the bellows simultaneously, and can avoid elastic rubber ring to drop through anti-disengaging structure, thereby make the bellows reset fast, improve bellows response speed, and add and establish elastic rubber ring and compare than prior art, its manufacturing cost is cheaper, it is removable when elastic rubber ring is ageing, improve the practicality of bellows.
Drawings
FIG. 1 is a schematic structural view of an axial external pressure type expansion joint;
FIG. 2 is an enlarged partial view of an axial external pressure expansion joint;
in the figure: the device comprises an outer pipe 1, a middle pipe 2, a sleeve 3, a corrugated pipe 4, a crest portion 41, a trough portion 42, an outer protective pipe 5, an elastic rubber ring 6, a ring cavity 61, a limiting ring portion 62, sealing filler 7, a pull rod 8 and an ear plate 9.
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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, an axial external pressure type expansion joint includes an outer tube 1, a middle tube 2, a sleeve 3 and a corrugated tube 4, the outer tube 1 is fixedly connected to the middle tube 2, one end of the sleeve 3 is coaxially sleeved on the middle tube 2, an annular sealing cavity is enclosed between the connecting ends of the sleeve 3 and the middle tube 2, a sealing filler 7 is filled in the sealing cavity, the corrugated tube 4 is coaxially sleeved outside the outer tube 1, one end of the corrugated tube 4 is fixedly connected to the middle tube 2, the other end of the corrugated tube 4 is fixedly connected to the sleeve 3, the corrugated tube 4 has a peak portion 41 and a valley portion 42 that are connected to each other, both the wave 41 and the peak portion 42 are provided with an elastic rubber ring 6, the elastic rubber ring 6 is embedded inside the wave peak portion 41, the elastic rubber ring 6 is externally sleeved on the wave valley portion 42, an anti-falling structure is arranged between the elastic rubber ring 6 and the corrugated pipe 4.
When the sleeve 3 stretches axially to drive the corrugated pipe 4 to stretch, the crest portion 41 and the trough portion 42 on the corrugated pipe 4 extend outwards or bend inwards, when the corrugated pipe 4 is in a compression state, the crest portion 41 and the trough portion 42 bend inwards, the elastic rubber ring 6 is extruded, thereby buffering the compression force, and simultaneously reducing the bearing pressure portion of the corrugated pipe 4, avoiding the crest portion 41 or the trough portion 42 from being crushed, so as to ensure the normal operation of the pipeline, when the corrugated pipe 4 is in a stretching state, the elastic rubber ring 6 provides resilience, and can avoid the elastic rubber ring 6 from falling off through an anti-falling structure, thereby enabling the corrugated pipe 4 to reset quickly, improving the response speed of the corrugated pipe 4, and compared with the prior art, the production cost is lower, the elastic rubber ring 6 is replaceable when aging, and the practicability of the corrugated pipe 4 is improved.
In this embodiment, specifically, the anti-dropping structure includes a limiting ring portion 62, the limiting ring portion 62 is integrally formed on the outer annular surfaces of the two ends of the elastic rubber ring 6, and annular grooves for the limiting ring portion 62 to be embedded are respectively formed on the crest portion 41 and the trough portion 42.
In this embodiment, preferably, an annular cavity 61 is formed in the elastic rubber ring 6, the cross section of the annular cavity 61 is elliptical, the long half axis direction of the cross section of the annular cavity 61 is parallel to the expansion and contraction direction of the corrugated tube 4, and through the arrangement of the annular cavity 61, compared with the solid elastic rubber ring 6, the elastic resistance of the elastic rubber ring is smaller, so that the compression resistance of the corrugated tube 4 is reduced.
In this embodiment, preferably, in order to play good dustproof effect, still include outer pillar 5, outer pillar 5 is coaxial to be located the outside of bellows 4, the one end of outer pillar 5 with outer tube 1 links firmly, the through-hole that supplies sleeve 3 to pass is seted up to the other end of outer pillar 5, still includes three piece at least pull rods 8, pull rod 8 fixed mounting be in on the end wall of outer pillar 5, pull rod 8 encircles the through-hole is arranged, lug 9 has been arranged to circumference on the sleeve 3, pull rod 8 slides and wears to locate on lug 9.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. An axial external pressure type expansion joint comprises an outer pipe, a middle pipe, a sleeve and a corrugated pipe, wherein the outer pipe is fixedly connected with the middle pipe, one end of the sleeve is coaxially sleeved on the middle pipe, an annular sealing cavity is enclosed between the sleeve and the connecting end of the middle pipe, sealing filler is filled in the sealing cavity, the corrugated pipe is coaxially sleeved outside the outer pipe, one end of the corrugated pipe is fixedly connected with the middle pipe, the other end of the corrugated pipe is fixedly connected with the sleeve, and the corrugated pipe is provided with a crest part and a trough part which are connected with each other, and the axial external pressure type expansion joint is characterized in that: the corrugated pipe is characterized in that elastic rubber rings are arranged on the wave peak part and the wave trough part, the elastic rubber rings are embedded in the wave peak part from the inside, the elastic rubber rings are sleeved in the wave trough part from the outside, and an anti-falling structure is arranged between the elastic rubber rings and the corrugated pipe.
2. An axial external pressure type expansion joint according to claim 1, wherein: the anti-disengaging structure comprises a limiting ring part which is integrally formed on the outer ring surfaces at two ends of the elastic rubber ring, and annular grooves for embedding the limiting ring part are formed in the crest part and the trough part.
3. An axial external pressure type expansion joint according to claim 1, wherein: an annular cavity is formed in the elastic rubber ring, the cross section of the annular cavity is oval, and the direction of a long half shaft of the cross section of the annular cavity is parallel to the telescopic direction of the corrugated pipe.
4. An axial external pressure type expansion joint according to claim 1, wherein: the corrugated pipe comprises a corrugated pipe body and is characterized by further comprising an outer protecting pipe, wherein the outer part of the corrugated pipe body is coaxially sleeved with the outer protecting pipe, one end of the outer protecting pipe is fixedly connected with the outer pipe, and the other end of the outer protecting pipe is provided with a through hole for the sleeve to pass through.
5. An axial external pressure type expansion joint according to claim 4, wherein: the pull rod is fixedly installed on the end wall of the outer protecting pipe, the pull rod is arranged around the through hole, lug plates are circumferentially arranged on the sleeve, and the pull rod penetrates through the lug plates in a sliding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258034.1U CN211821255U (en) | 2020-03-05 | 2020-03-05 | Axial external pressure type expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258034.1U CN211821255U (en) | 2020-03-05 | 2020-03-05 | Axial external pressure type expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211821255U true CN211821255U (en) | 2020-10-30 |
Family
ID=72997411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020258034.1U Expired - Fee Related CN211821255U (en) | 2020-03-05 | 2020-03-05 | Axial external pressure type expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211821255U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345286A (en) * | 2022-02-28 | 2022-04-15 | 茂名重力石化装备股份公司 | Series pipe reactor with closed type waveform expansion joint |
| CN114688368A (en) * | 2022-04-06 | 2022-07-01 | 云南省滇中引水工程有限公司 | Preparation method of fracture-resistant buried steel pipe of over-active fault |
-
2020
- 2020-03-05 CN CN202020258034.1U patent/CN211821255U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345286A (en) * | 2022-02-28 | 2022-04-15 | 茂名重力石化装备股份公司 | Series pipe reactor with closed type waveform expansion joint |
| CN114345286B (en) * | 2022-02-28 | 2024-05-17 | 茂名重力石化装备股份公司 | String pipe reactor with closed waveform expansion joint |
| CN114688368A (en) * | 2022-04-06 | 2022-07-01 | 云南省滇中引水工程有限公司 | Preparation method of fracture-resistant buried steel pipe of over-active fault |
| CN114688368B (en) * | 2022-04-06 | 2024-04-12 | 云南省滇中引水工程有限公司 | Preparation method of fracture-resistant buried steel pipe with overactive fault |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |