CN100451425C - Expansion joint for pipeline - Google Patents
Expansion joint for pipeline Download PDFInfo
- Publication number
- CN100451425C CN100451425C CNB2006100906651A CN200610090665A CN100451425C CN 100451425 C CN100451425 C CN 100451425C CN B2006100906651 A CNB2006100906651 A CN B2006100906651A CN 200610090665 A CN200610090665 A CN 200610090665A CN 100451425 C CN100451425 C CN 100451425C
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- Prior art keywords
- pipe
- sleeve pipe
- pipeline
- injection valve
- sealing
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Abstract
The present invention relates to a compensating expansion device for a pipeline, which comprises a flange pipe, a sleeve pipe, filling materials, flexible sealing grease, a filling valve of sealing grease and an expansion flange pipe. After the sleeve pipe is sheathed outside the expansion flange pipe, the expansion flange pipe extends into the internal cavity of the flange pipe, and a certain distance is extended in the pipe. The sleeve pipe and the terminal of the flange pipe are welded and fixed or cast into a whole; the middle section of the internal cavity of the sleeve pipe is provided with an annular groove which forms a sealing cavity with the external surface of the expansion flange pipe; both ends of the sealing cavity are filled with the filling materials and the sealing grease; the filling valve of sealing grease comprises a valve body, a filling plug, and a sealing ball; the filling valve of sealing grease is arranged on the periphery of the sealing cavity; the valve body and the pipe wall of the sleeve pipe are sealed and connected by threads; the internal cavity of the valve body is communicated with the sealing cavity in the sleeve pipe; the flexible sealing grease is injected from the internal cavity of the valve body; the vacant position between the filling materials in both of the two ends of the sealing cavity is filled, and then, the sealing cavity is tightly plugged by the filling plug. The present invention has the advantages of compact structure, super-high strength, reliable performance, on-line leakage mending, long service life and corrosion resistance. Compared with the existing expansion device for a pipeline, the present invention has good temperature resistant performance and good pressure resistant performance.
Description
Technical field
The present invention relates to a kind of mass transport pipeline compensation device, particularly relate to a kind of expansion joint for pipeline.
Prior art
The Pressure Piping Engineering of a lot of long-distance transport pipes of China as: in the pipeline engineering work progresss such as oil transportation, gas transmission (rock gas), chemical engineering, power engineering, petrochemical industry, metallurgy, papermaking, coal gas, water supply, must consider pipeline is former because of the pressure and temperature of weather, medium etc. thereby produce stretching and shortening, Conncetion cimension to pipe-work construction compensates in advance, makes the pipeline can safe and reliable operation.On mounted pipeline, because of pressure of weather, medium temperature and medium etc., also can cause expanding with heat and contract with cold of pipeline, also need to use the compensation of pipeline device to compensate; The equipment that China is used for compensating at present is expansion joint and expansion bend, existing expansion joint and expansion bend compensation are subjected to the restriction of length, temperature, pressure, the wall of expansion joint is very thin and be subjected to the restriction of length, expansion bend is to use seal with elastometic washer, because material is limit, these two kinds of equipment all can not satisfy the performance of high temperature high voltage resistant (120 ℃ of heatproof ∠, withstand voltage ∠ 2.0MPa) simultaneously.The expansion bend of seal with elastometic washer particularly, its highest heatproof upper limit is lower than 120 ℃, also is easy to generate leakage, and in pipeline very difficult mending-leakage in service, thereby causes problems such as working life is too short.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of expansion joint for pipeline that can overcome the prior art defective, adopt injection valve to inject the seal gease sealing technique, to improve the high temperature high voltage resistant and the decay resistance of expansion joint for pipeline.
For achieving the above object, technological scheme of the present invention is: described expansion joint for pipeline comprises first flanged pipe, sleeve pipe, filler, flexible sealing grease, filler injection valve, creeping flange pipe; Wherein: after described creeping flange pipe overcoat tubing, stretch into the first flanged pipe inner chamber again, and in the pipe of this first flanged pipe, extend certain distance, the terminal of the described sleeve pipe and first flanged pipe is sealedly and fixedly connected, stage casing at sleeve pipe is provided with annular groove, this annular groove forms Seal cage with the creeping flange tube outer surface, two ends in the sealing chamber are filled with filler, described filler injection valve comprises tube wall, inject chamber and sealing plug, this filler injection valve is arranged on top, sealing chamber, the tube wall of its tube wall and sleeve pipe is made of one, it injects the chamber and is communicated with Seal cage in the sleeve pipe, described flexible sealing grease injects from the injection chamber of filler injection valve, fill up the vacant position between the filler of two ends in the Seal cage, inject the top in chamber then with this filler injection valve of sealing plug jam-pack.
In the expansion joint for pipeline of the present invention, seal gease injects with injection valve, and the modern design of injection valve is rational in infrastructure, not only can inject seal gease, can also prevent that seal gease from flowing backwards, and allows the band pressure injection to go into operation, therefore can be implemented in line and injects seal gease.The present invention adopts seal gease and filler compound seal, and wherein the seal gease of up-to-date development has sufficient fluid ability and good temperature resistance energy, and its heatproof degree upper limit can be brought up to 230 ℃, be not easy to produce and leak.In service as find that flexible sealing position leaks outside at pipeline, only need tighten the seal gease injection valve again or adding a small amount of seal gease can solve.Compact structure of the present invention has the intensity of superelevation, and reliable performance can online mending-leakage, long service life, corrosion-resistant, has filled up domestic this series products blank, reaches world level, brings good economic benefit and social benefit for country and enterprise.
Description of drawings
Fig. 1 is an expansion joint for pipeline cross-sectional view of the present invention
Fig. 2 is the side view of expansion joint for pipeline injection valve part shown in Figure 1
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1: expansion joint for pipeline of the present invention comprises the one the first flanged pipes 1, sleeve pipe 2, filler 3, flexible sealing grease 4, filler injection valve 5, creeping flange pipe; Wherein: after described creeping flange pipe 6 overcoat tubings 2, stretch into first flanged pipe, 1 inner chamber again, and in the pipe of this first flanged pipe 1, extend certain distance, the terminal of the described sleeve pipe 2 and first flanged pipe 1 is sealedly and fixedly connected, stage casing at sleeve pipe 2 is provided with annular groove, this annular groove forms Seal cage 21 with creeping flange pipe 6 outer surfaces, be filled with filler 3 at the two ends in sealing chamber 21, described filler injection valve 5 comprises tube wall, inject chamber 50 and sealing plug 51, this filler injection valve 5 is arranged on 21 tops, sealing chamber, the tube wall of its tube wall and sleeve pipe 2 is made of one, it injects chamber 50 and is communicated with Seal cage 21 in the sleeve pipe 2, described flexible sealing grease 4 injects from the injection chamber 50 of filler injection valve 5, fill up the vacant position between the two ends filler 3 in the Seal cage 21, use the top in the injection chamber 50 of this filler injection valve 5 of sealing plug 51 jam-packs then.
For with flexible sealing grease 4 more equably in the Seal cage 21 in the sprue bushing 2, the number that is arranged on the filler injection valve 5 on the described sleeve pipe 2 can be for a plurality of.
As shown in Figure 2, in the present embodiment, the number that is arranged on the filler injection valve 5 on the described sleeve pipe 2 is 3, is that the axle center is evenly arranged on the sleeve pipe 2 outer wall circumference with sleeve pipe 2 stage casing centre points.
Install for convenience and operation, form certain tilt angle between described filler injection valve 5 tube walls and described sleeve pipe 2 outer walls.
In the present embodiment, the tilt angle between described filler injection valve 5 tube walls and described sleeve pipe 2 outer walls is 45 degree.
Deviate from first flanged pipe, 1 inner chamber fully for preventing creeping flange pipe 6, the duct end that stretches in the segment pipe of first flanged pipe, 1 inner chamber at described creeping flange pipe 6 is set with catch pin 7, the top of this catch pin 7 slightly protrudes from described creeping flange pipe 6 outer walls, and the internal diameter of the pipeline of described sleeve pipe 2 is slightly less than described first flanged pipe, 1 internal diameter of the pipeline.
Described flexible sealing grease 4 has sufficient fluid ability and good temperature resistance energy, and its main component is: tetrafluoroethylene fecula, expanded graphite, iron oxide, super-fine zinc dust, two fluidisation molybdenums, mica flour, silica gel etc.
Expansion joint for pipeline working procedure of the present invention is as follows:
Between per two whole material conveying pipes, insert expansion joint for pipeline of the present invention, being about to first flanged pipe 1 of this expansion joint for pipeline and creeping flange pipe 6 outermost end is sealedly and fixedly connected respectively on the Material pipeline, when Material pipeline causes the pipeline overtime because of reasons such as environment intensification or institute's transported material temperature, described creeping flange pipe 6 is tried hard to recommend down moving outside, its part that stretches into first flanged pipe, 1 inner chamber continues to extend internally, and disappears up to external force; When Material pipeline caused pipeline to shorten because of reasons such as colds, described creeping flange pipe 6 stretched into the part of first flanged pipe, 1 inner chamber because external force pulls and outwards bounces back, and disappears up to external force.In these creeping flange pipe 6 extensions and retraction engineering, by the sealing of filler 3 in described sleeve pipe 2 Seal cages 21 of injection and the whole expansion joint for pipeline pipeline of flexible sealing grease 4 assurances.
This product be applied in pipeline valve as: in the engineerings such as oil transportation, gas transmission (rock gas), chemical engineering, power engineering, petrochemical industry, metallurgy, papermaking, coal gas, water supply, compensation conduit is because of the stretching and the shortening of the generations such as pressure and temperature of weather, medium, the Conncetion cimension of compensation pipe-work construction makes the pipeline can safe and reliable operation.
Expansion joint for pipeline product index of the present invention:
Working pressure 150LB, 300LB
Medium temperature≤230 ℃
The nominal 150LB 2 " 12 " that stimulates the menstrual flow;
300LB2″-10″
Water, steam, the oil product of working medium≤230 ℃, acids etc.
Seal gease has sufficient fluid ability, heatproof≤230 ℃
The seal gease injection valve: can inject seal gease, again can be to the excessive non-return of seal gease
Product of the present invention has following advantage:
The general structure design that a is novel
Compact conformation has the intensity of superelevation, dependable performance, domestic initiation.
The encapsulant that b is novel
Adopt seal gease and filler compound seal, seal gease is our company oneself development, is domestic initiation, has reached world level.
The seal gease injection valve that c is novel
Seal gease injects with injection valve, and the injection valve modern design not only can be injected seal gease, can also prevent that seal gease from flowing backwards, therefore can online injection seal gease, and injection valve is a domestic initiation in this product.
The d long service life
Unique seal designs, in service at pipeline, allow the band pressure injection to go into seal gease.It is the function that other like product does not have.
The product that e is safe and reliable
The safety and reliability of this product are that other like product is incomparable.
Claims (7)
1, a kind of expansion joint for pipeline is characterized in that: it comprises first flanged pipe (1), sleeve pipe (2), filler (3), flexible sealing grease (4), seal gease injection valve (5), creeping flange pipe (6); Wherein: stretch into first flanged pipe (1) inner chamber afterwards again at described creeping flange pipe (6) overcoat tubing (2), and in the pipe of this first flanged pipe (1), extend certain distance, described sleeve pipe (2) is fixed with the terminal welding of first flanged pipe (1) or is cast into one, inner chamber stage casing at sleeve pipe (2) is provided with annular groove, this annular groove forms Seal cage (21) with creeping flange pipe (6) outer surface, be filled with filler (3) at the two ends of sealing chamber (21), described seal gease injection valve (5) comprises valve body, filler plug (51) and ball sealer (50), sealing fat injection valve (5) is arranged on periphery, sealing chamber (21), its valve body is connected with the tube wall thread seal of sleeve pipe (2), its body cavity is communicated with the interior Seal cage of sleeve pipe (2) (21), described flexible sealing grease (4) injects from the body cavity of seal gease injection valve (5), fill up the vacant position between Seal cage (21) the interior two ends fillers (3), use sealing plug (51) jam-pack sealing fat injection valve (5) then; Described ball sealer (50) is positioned at body cavity, when injecting flexible sealing grease (4), ball sealer (50) is positioned at the lower end of body cavity, flexible sealing grease flows out from the areole of body cavity, opens seal gease injection valve (5), when stopping to inject flexible sealing grease (4), because of discharge area, the discharge area of the areole of body cavity less than the valve body lower end hole, ball sealer (50) is subjected to the interior pressure effect of pipeline to be positioned at the upper end of body cavity, stops seal gease excessive, and seal gease injection valve (5) is closed.
2, expansion joint for pipeline according to claim 1 is characterized in that: the number that is arranged on the seal gease injection valve (5) on the described sleeve pipe (2) is a plurality of.
3, expansion joint for pipeline according to claim 2 is characterized in that: the number that is arranged on the seal gease injection valve (5) on the described sleeve pipe (2) is 3, and is that the axle center is evenly arranged on sleeve pipe (2) the outer wall circumference with sleeve pipe (2) stage casing centre point.
4, according to any one described expansion joint for pipeline in the claim 1 to 3, it is characterized in that: form certain tilt angle between described seal gease injection valve (5) tube wall and described sleeve pipe (2) outer wall.
5, expansion joint for pipeline according to claim 4 is characterized in that: the tilt angle between described seal gease injection valve (5) tube wall and described sleeve pipe (2) outer wall is 45 degree.
6, according to any one described expansion joint for pipeline in the claim 1 to 3, it is characterized in that: stretch in the segment pipe of first flanged pipe (1) inner chamber at described creeping flange pipe (6), be set with catch pin (7) at this duct end, the top of this catch pin (7) slightly protrudes from described creeping flange pipe (6) outer wall, and the internal diameter of the pipeline of described sleeve pipe (2) is coughed up the internal diameter of the pipeline less than described first flanged pipe (1).
7, according to claim 1 or 2 or 3 described expansion joint for pipeline, it is characterized in that: the main component of described flexible sealing grease (4) is: tetrafluoroethylene fecula, expanded graphite, iron oxide, super-fine zinc dust, two fluidisation molybdenums, mica flour, silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100906651A CN100451425C (en) | 2006-07-03 | 2006-07-03 | Expansion joint for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100906651A CN100451425C (en) | 2006-07-03 | 2006-07-03 | Expansion joint for pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1884892A CN1884892A (en) | 2006-12-27 |
| CN100451425C true CN100451425C (en) | 2009-01-14 |
Family
ID=37583175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100906651A Expired - Fee Related CN100451425C (en) | 2006-07-03 | 2006-07-03 | Expansion joint for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100451425C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397810B (en) * | 2019-08-06 | 2020-06-12 | 彭泽县天然气有限公司 | Sealing treatment method for oil and gas conveying pipeline joint |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168090A (en) * | 1977-12-23 | 1979-09-18 | Kaufmann John Jun | Expansion compensating pipe coupling |
| CN2038985U (en) * | 1988-06-09 | 1989-06-07 | 张亚新 | Engineering pipeline expansion compensator |
| CN2110126U (en) * | 1991-06-22 | 1992-07-15 | 阜宁县第一机械厂 | Balance extension compensater |
| CN2166300Y (en) * | 1993-09-03 | 1994-05-25 | 古春宏 | Pour plug type non-medium thrust compensator |
| CN2221699Y (en) * | 1995-06-16 | 1996-03-06 | 文长朴 | Sealed balanced pipe compensator |
| CN2630616Y (en) * | 2003-04-28 | 2004-08-04 | 应明雄 | Connector special for filling phosphor or refrigrant |
-
2006
- 2006-07-03 CN CNB2006100906651A patent/CN100451425C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168090A (en) * | 1977-12-23 | 1979-09-18 | Kaufmann John Jun | Expansion compensating pipe coupling |
| CN2038985U (en) * | 1988-06-09 | 1989-06-07 | 张亚新 | Engineering pipeline expansion compensator |
| CN2110126U (en) * | 1991-06-22 | 1992-07-15 | 阜宁县第一机械厂 | Balance extension compensater |
| CN2166300Y (en) * | 1993-09-03 | 1994-05-25 | 古春宏 | Pour plug type non-medium thrust compensator |
| CN2221699Y (en) * | 1995-06-16 | 1996-03-06 | 文长朴 | Sealed balanced pipe compensator |
| CN2630616Y (en) * | 2003-04-28 | 2004-08-04 | 应明雄 | Connector special for filling phosphor or refrigrant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1884892A (en) | 2006-12-27 |
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Addressee: Xu Linbin Document name: Notice of first review |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 |