CN202612964U - External pressure corrosion-resistant expansion joint - Google Patents

External pressure corrosion-resistant expansion joint Download PDF

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Publication number
CN202612964U
CN202612964U CN 201220257508 CN201220257508U CN202612964U CN 202612964 U CN202612964 U CN 202612964U CN 201220257508 CN201220257508 CN 201220257508 CN 201220257508 U CN201220257508 U CN 201220257508U CN 202612964 U CN202612964 U CN 202612964U
Authority
CN
China
Prior art keywords
pipe
bellows
tube
external pressure
corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220257508
Other languages
Chinese (zh)
Inventor
黄琳
郭翔凌
金殿才
李利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QINHUANGDAO NORTH METAL HOSE CO Ltd
Original Assignee
QINHUANGDAO NORTH METAL HOSE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by QINHUANGDAO NORTH METAL HOSE CO Ltd filed Critical QINHUANGDAO NORTH METAL HOSE CO Ltd
Priority to CN 201220257508 priority Critical patent/CN202612964U/en
Application granted granted Critical
Publication of CN202612964U publication Critical patent/CN202612964U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an external pressure corrosion-resistant expansion joint, which comprises a first connecting pipe, a second connecting pipe, an external pressure pipe, a working corrugated pipe and a corrosion-resistant corrugated pipe, wherein the working corrugated pipe is connected in series with the corrosion-resistant corrugated pipe through a sliding pipe; the second connecting pipe is positioned in the working corrugated pipe and the corrosion-resistant corrugated pipe, and two ends of the second connecting pipe are respectively closed with the inlet end of the working corrugated pipe and the outlet end of the corrosion-resistant corrugated pipe; and the external pressure pipe is sleeved outside the working corrugated pipes, and two ends of the external pressure pipe are respectively welded with the first connecting pipe and the sliding pipe. The working corrugated pipe and the corrosion-resistant corrugated pipe are connected in series and compensate the stress change of the pipeline, the corrosion-resistant corrugated pipe is made of an iron-based corrosion-resistant material according to operating states of the two corrugated pipes, and the working corrugated pipe is made of a common stainless steel material, so that the aims of reducing the cost of the product and meeting the requirement of the service life are fulfilled.

Description

The anticorrosion expansion joint of a kind of external pressure
Technical field
The utility model relates to a kind of pipe network parts, especially for the anticorrosion expansion joint of external pressure of process pipes such as heating network, metal conduit technical field.
Background technique
The process pipe system in fields such as urban heating because of thermal stress and the physical descriptor that pipe temperature, variation in pressure cause, needs to adopt expansion joint to compensate the STRESS VARIATION of pipeline usually.Expansion joint is as the important device in the pipe-line system; Receive atmosphere and etchant gas such as hot steam, face of land moisture erosion on every side on the one hand; Therefore also to bear bigger working pressure on the other hand, need adopt the iron-based austenite material that has good anti-corrosion capacity and have certain intensity to solve to the core component bellows in the expansion joint usually.These iron-based austenite materials cost an arm and a leg, and are 5-15 times of common stainless steel price, have therefore increased the operating cost of pipe-line system greatly.If adopting common stainless steel is the bellows material, under atmosphere and hot steam, surface humidity corrosion on every side, can reduce the safe operating life of expansion joint greatly, can increase operating cost equally.
The model utility content
The utility model technical problem to be solved is: provide a kind of and satisfying the anticorrosion expansion joint of external pressure that can reduce operating cost under the expansion joint safe operating life condition.
The alleged problem of the utility model is solved by following technological scheme:
The anticorrosion expansion joint of a kind of external pressure; Its specialization is: it comprises first connecting tube, second connecting tube, external pressure tube, work bellows and anticorrosion bellows; Said work bellows, anticorrosion bellows are connected in series through slip pipe, and said second connecting tube is positioned at work bellows and anticorrosion bellows, and its two ends are sealed with work bellows entrance point, anticorrosion bellows outlet end respectively; Said external pressure tube is sleeved on outside the work bellows, and its two ends are seam first connecting tube, slip pipe respectively.
The anticorrosion expansion joint of above-mentioned external pressure; Said expansion joint also is provided with the 3rd adapter, the 4th adapter; The said second connecting tube left end is through the 3rd connecting tube and the sealing of work bellows entrance point, and the said second connecting tube right-hand member is through the outlet end sealing of the 4th connecting tube and anticorrosion bellows.
The utility model not only guarantees safe operating life but also reduce the operating cost problem to solving the pipe network system expansion joint, has designed the anticorrosion expansion joint of a kind of external pressure.This expansion joint bellows and anticorrosion bellows serial connection of will working, both compensate the STRESS VARIATION of pipeline jointly.Bellows and the external environment of wherein working is isolated, need bear pressure medium; Anticorrosion bellows directly contacts extraneous etchant gas and only bears an atmospheric pressure; Working state according to above-mentioned two bellowss; Select the anticorrosion bellows of iron base corrosion-resisting material for use; Use common stainless steel material work bellows, thereby realized not only reducing product cost but also satisfy the purpose that require working life.The utlity model has reasonable in design, compact structure, reliability high, convenient for installation and maintenance, practice thrift characteristics such as cost.
Description of drawings
Fig. 1 is the utility model structural representation.
Label is represented as follows in the accompanying drawing: 1. first connecting tube; 2. external pressure tube; 3. the 3rd connecting tube; 4. work bellows; 5. second connecting tube; 6. slip pipe; 7. anticorrosion bellows; 8. the 4th connecting tube.
Embodiment
Referring to Fig. 1, the utility model comprises first connecting tube 1, second connecting tube 5, external pressure tube 2, work bellows 4 and anticorrosion bellows 7.Between work bellows, anticorrosion bellows, be provided with slip pipe 6, slip pipe respectively with work bellows right-hand member, the seam of anticorrosion bellows left end, above-mentioned two bellowss are connected in series.Second connecting tube 5 is positioned at work bellows and anticorrosion bellows, the second connecting tube left end be provided with the 3rd connecting tube 3, the three connecting tubes respectively with the second connecting tube left end, the seam of work bellows entrance point; The second connecting tube right-hand member be provided with the 4th connecting tube 8, the four connecting tubes respectively with the second connecting tube right-hand member, the seam of anticorrosion bellows outlet end; Said external pressure tube 2 is sleeved on outside the work bellows 4, its two ends respectively with first connecting tube, slip pipe seam.
Still referring to Fig. 1; During the utility model work; When first connecting tube 1 and the 5 generation axial displacements of second connecting tube, the bellows 4 that pushes the work forward is worked with anticorrosion bellows 7 simultaneously, and the work bellows was in extended state when extraction duct produced thermal compensation; Anticorrosion bellows is in compressive state, forms balance space.Opposite anticorrosion bellows is in extended state when the work bellows is in compressive state, forms balance space.Work bellows and environment are isolated, and it bears pipeline internal medium pressure, and anticorrosion bellows 7 is exposed in the atmosphere, and it is in the pressure effect of bearing an atmospheric pressure all the time.Therefore the bellows 4 of working adopts the common stainless steel material with certain intensity, has reduced manufacture cost.Anticorrosion bellows 7 adopts the iron base corrosion-resisting materials to manufacture and design, and has realized the anticorrosion of anticorrosion bellows 7 simultaneously and has protected work bellows 4.

Claims (2)

1. anticorrosion expansion joint of external pressure; It is characterized in that: it comprises first connecting tube (1), second connecting tube (5), external pressure tube (2), work bellows (4) and anticorrosion bellows (7); Said work bellows, anticorrosion bellows are connected in series through slip pipe (6); Said second connecting tube is positioned at work bellows and anticorrosion bellows; Its two ends are sealed with work bellows entrance point, anticorrosion bellows outlet end respectively, and said external pressure tube is sleeved on outside the work bellows, and its two ends are seam first connecting tube, slip pipe respectively.
2. the anticorrosion expansion joint of external pressure according to claim 1; It is characterized in that: said expansion joint also is provided with the 3rd and takes over (3), the 4th adapter (8); Said second connecting tube (5) left end is through the 3rd connecting tube (3) and the sealing of work bellows (4) entrance point, and the said second connecting tube right-hand member is through the outlet end sealing of the 4th connecting tube (8) with anticorrosion bellows (7).
CN 201220257508 2012-06-04 2012-06-04 External pressure corrosion-resistant expansion joint Expired - Fee Related CN202612964U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220257508 CN202612964U (en) 2012-06-04 2012-06-04 External pressure corrosion-resistant expansion joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220257508 CN202612964U (en) 2012-06-04 2012-06-04 External pressure corrosion-resistant expansion joint

Publications (1)

Publication Number Publication Date
CN202612964U true CN202612964U (en) 2012-12-19

Family

ID=47346662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220257508 Expired - Fee Related CN202612964U (en) 2012-06-04 2012-06-04 External pressure corrosion-resistant expansion joint

Country Status (1)

Country Link
CN (1) CN202612964U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486392A (en) * 2013-09-30 2014-01-01 江苏百新波纹管有限公司 Direct burial inside and outside pressure automatic alarming bellow expansion joint

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486392A (en) * 2013-09-30 2014-01-01 江苏百新波纹管有限公司 Direct burial inside and outside pressure automatic alarming bellow expansion joint

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121219

Termination date: 20190604