CN203258281U - Negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint - Google Patents
Negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint Download PDFInfo
- Publication number
- CN203258281U CN203258281U CN 201320152399 CN201320152399U CN203258281U CN 203258281 U CN203258281 U CN 203258281U CN 201320152399 CN201320152399 CN 201320152399 CN 201320152399 U CN201320152399 U CN 201320152399U CN 203258281 U CN203258281 U CN 203258281U
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- China
- Prior art keywords
- tetrafluoroethylene
- lining
- negative pressure
- ring
- expansion joint
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- Expired - Fee Related
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Abstract
The utility model discloses a negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint which comprises flanges, a corrugated pipe and a tetrafluoroethylene lining. The corrugated pipe is fixedly connected with the flanges at the two ends of the corrugated pipe to form a corrugated pipe compensation structure, the tetrafluoroethylene lining is attached to the inner surface of the corrugated pipe, an elastic negative pressure ring is arranged in a corrugated pipe ring groove, and the negative pressure ring is a circular-ring-shaped component and is in clearance fit with the tetrafluoroethylene lining in the corrugated pipe ring groove. The negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint is characterized in that the negative pressure ring is composed of a loop and a tetrafluoroethylene outer lining, wherein the loop is formed by elastic metal wires in a defined mode, the tetrafluoroethylene outer lining covers the loop and is formed by tetrafluoroethylene strips wound on the loop, and the loop is formed by spring steel wires in the defined mode. The tetrafluoroethylene lining is pressed by the negative pressure ring, and even under the action of negative pressure, the tetrafluoroethylene lining can not deform, so that normal use of the lining tetrafluoroethylene expansion joint is ensured, the outer wall of the loop of the negative pressure ring is covered by the tetrafluoroethylene outer lining, a protective layer is added between the negative pressure ring and the tetrafluoroethylene lining, and therefore service life of the negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint is significantly prolonged.
Description
Technical field
The utility model relates to a kind of pipe safety equipment, specifically, relates to a kind of lining tetrafluoro bellows expansion joint.
Background technique
The lining tetrafluoro bellows expansion joint of prior art comprises flange, bellows, tetrafluoro liner, and bellows is fixedly connected with the flange at two ends, consists of the bellows collocation structure, and the tetrafluoro liner is fitted in bellows inside surface.This lining tetrafluoro bellows expansion joint can not only be used for pipe-line system, play length, temperature, position and angle compensation effect, and owing to its liner tetrafluoro, so that it has again preferably corrosion resistance, can be widely used in the pipe-line system of carrying Korrosionsmedium.But this lining tetrafluoro bellows expansion joint exists certain defective: when being applied to the pipe-line system of negative pressure, the negative pressure in the pipeline may make the tetrafluoro liner produce distortion, thus the normal use of impact lining tetrafluoro bellows expansion joint.
The model utility content
The utility model is for the deficiencies in the prior art, even a kind of anti-negative pressure that the tetrafluoro liner also can be out of shape under suction function, corrosion-resistant steel lining tetrafluoro expansion joint are provided.
The utility model is achieved through the following technical solutions technical goal.
Anti-negative pressure, corrosion-resistant steel lining tetrafluoro expansion joint comprise flange, bellows, tetrafluoro liner; Described bellows is fixedly connected with the flange at two ends, consists of the bellows collocation structure; Described tetrafluoro liner is fitted in bellows inside surface; Its improvements are: be provided with the elastic negative pressure ring in the bellows annular groove; Described negative pressure ring is circular member, cooperates with tetrafluoro liner gap in the bellows annular groove.
The utility model further improves and is: described negative pressure ring is the ring that elastic metallic yarn surrounds.
Another kind of further improvement of the utility model is: the ring that described negative pressure ring is surrounded by elastic metallic yarn, the tetrafluoro outer lining that is coated on the ring form.
The utility model further improves and is: described tetrafluoro outer lining is to be wrapped in ring by Teflon tap to form.
The utility model further improves and is: described ring is surrounded by Spring Steel Wire.
The utility model compared with prior art has following good effect:
1, in the bellows annular groove, is provided with the elastic negative pressure ring, pushes down the tetrafluoro liner by the negative pressure ring, like this, even the tetrafluoro liner can not be out of shape under suction function, thereby guaranteed the normal use of lining tetrafluoro expansion joint yet.
2, the ring outer wall of negative pressure ring is coated with the tetrafluoro outer lining, has increased layer protective layer between negative pressure ring and tetrafluoro liner, the working life of significant prolongation lining tetrafluoro expansion joint.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the local enlarged diagram of I part among Fig. 1.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and in conjunction with the embodiments for the below.
Anti-negative pressure shown in the drawings, corrosion-resistant steel lining tetrafluoro expansion joint comprise flange 1, bellows 2, tetrafluoro liner 3; Bellows 2 is fixedly connected with the flange 1 at two ends, consists of the bellows collocation structure; Tetrafluoro liner 3 is fitted in bellows 2 internal surfaces; In bellows 2 annular grooves, be provided with elastic negative pressure ring 4; Negative pressure ring 4 is circular member, cooperates with tetrafluoro liner 3 gaps in bellows 2 annular grooves.
Negative pressure ring 4 has two kinds of preferred structure schemes: a kind of is the ring 4.2 that negative pressure ring 4 surrounds for elastic metallic yarn, another kind is that the ring 4.2 that surrounded by elastic metallic yarn of negative pressure ring 4, the tetrafluoro outer lining 4.1 that is coated on the ring 4.2 form, and what present embodiment was selected is rear a kind of.
In the present embodiment, tetrafluoro outer lining 4.1 is to be wrapped in ring 4.2 by Teflon tap to form, and like this, has increased layer protective layer between negative pressure ring 4 and tetrafluoro liner 3, but the working life of significant prolongation lining tetrafluoro expansion joint.。
In the present embodiment, ring 4.2 is surrounded by Spring Steel Wire.
Claims (5)
1. an anti-negative pressure, corrosion-resistant steel lining tetrafluoro expansion joint comprise flange (1), bellows (2), tetrafluoro liner (3); Described bellows (2) is fixedly connected with the flange (1) at two ends, consists of the bellows collocation structure; Described tetrafluoro liner (3) is fitted in bellows (2) internal surface; It is characterized in that: in bellows (2) annular groove, be provided with elastic negative pressure ring (4); Described negative pressure ring (4) is circular member, cooperates with tetrafluoro liner (3) gap in bellows (2) annular groove.
2. anti-negative pressure according to claim 1, corrosion-resistant steel lining tetrafluoro expansion joint is characterized in that: the ring (4.2) that described negative pressure ring (4) surrounds for elastic metallic yarn.
3. anti-negative pressure according to claim 1, corrosion-resistant steel lining tetrafluoro expansion joint, it is characterized in that: the ring (4.2) that described negative pressure ring (4) is surrounded by elastic metallic yarn, the tetrafluoro outer lining (4.1) that is coated on the ring (4.2) form.
4. anti-negative pressure according to claim 3, corrosion-resistant steel lining tetrafluoro expansion joint, it is characterized in that: described tetrafluoro outer lining (4.1) is to be wrapped in ring (4.2) by Teflon tap to form.
5. one of according to claim 2～3 described anti-negative pressure, corrosion-resistant steel lining tetrafluoro expansion joint, it is characterized in that: described ring (4.2) is surrounded by Spring Steel Wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320152399 CN203258281U (en) | 2013-03-30 | 2013-03-30 | Negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320152399 CN203258281U (en) | 2013-03-30 | 2013-03-30 | Negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203258281U true CN203258281U (en) | 2013-10-30 |
Family
ID=49470844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320152399 Expired - Fee Related CN203258281U (en) | 2013-03-30 | 2013-03-30 | Negative-pressure-resistant corrosion-resistant steel lining tetrafluoroethylene expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203258281U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006257A (en) * | 2014-06-05 | 2014-08-27 | 石家庄三环阀门股份有限公司 | Chloride ion corrosion-resistant expansion joint and manufacturing technique for corrugated pipe of expansion joint |
| CN104100795A (en) * | 2014-07-01 | 2014-10-15 | 江苏大力城电气有限公司 | Corrugated pipe special for corrugated expansion joint |
| CN104100796A (en) * | 2014-07-01 | 2014-10-15 | 江苏大力城电气有限公司 | Corrugated expansion joint |
-
2013
- 2013-03-30 CN CN 201320152399 patent/CN203258281U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006257A (en) * | 2014-06-05 | 2014-08-27 | 石家庄三环阀门股份有限公司 | Chloride ion corrosion-resistant expansion joint and manufacturing technique for corrugated pipe of expansion joint |
| CN104100795A (en) * | 2014-07-01 | 2014-10-15 | 江苏大力城电气有限公司 | Corrugated pipe special for corrugated expansion joint |
| CN104100796A (en) * | 2014-07-01 | 2014-10-15 | 江苏大力城电气有限公司 | Corrugated expansion joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20140330 |