CN102518902A - Volume compensation device for expansion joint of double-layer corrugated pipe - Google Patents
Volume compensation device for expansion joint of double-layer corrugated pipe Download PDFInfo
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- CN102518902A CN102518902A CN2011104466967A CN201110446696A CN102518902A CN 102518902 A CN102518902 A CN 102518902A CN 2011104466967 A CN2011104466967 A CN 2011104466967A CN 201110446696 A CN201110446696 A CN 201110446696A CN 102518902 A CN102518902 A CN 102518902A
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- volume compensation
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- corrugated pipe
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Abstract
The invention belongs to the technical field of petrochemical industries, relates to a volume compensation device for an expansion joint of a double-layer corrugated pipe, and mainly comprises a volume compensation corrugated pipe (15) and driving springs (16). The upper end of the volume compensation corrugated pipe (15) is connected with a vacuum pressure gauge (14) through a sealing plate (13), and the lower end of the volume compensation corrugated pipe (15) is communicated with interlamination of straight pipe sections of the double-layer corrugated pipe through an end pipe (1). Two driving springs (16) for driving the volume compensation corrugated pipe to achieve tension or compression to provide volume compensation are respectively arranged on two sides of the volume compensation corrugated pipe, and two ends of the driving springs (16) are respectively fixed on the end pipe (1) and the sealing plate (13). The volume compensation device for the expansion joint of the double-layer corrugated pipe can provide compensation volume larger than the volume of the interlamination of the double-layer corrugated pipe, compensates changes of vacuum degree caused by leakage of a vacuum system, avoids wrong judgment caused by the changes of vacuum pressure of a detection device, is matched with a monitoring device for use, and enables the monitoring device to be reliable.
Description
Technical field
The invention belongs to the petrochemical technology field, relate generally to a kind of volume compensation device that is used on the double-ply bellows expansion joint.
Background technique
For the strict applied environment of bellows Failure Control, bellows is usually designed to double layer construction, and every layer all can be born working condition (temperature, pressure) separately, and after wherein one deck lost efficacy, another layer still can proper functioning.In order in time to find the generation that bellows lost efficacy; Monitoring device need be set judge whether bellows lost efficacy; Adopting vacuum method is to judge one of method whether bellows lost efficacy; Promptly the bellows interlayer is vacuumized, utilize pressure vacuum gauge to monitor bellows interlayer degree of vacuum and change.According to ideal-gas equation, PV=nRT (P is a gas pressure, and V is a gas volume, and n is the amount of gaseous matter, and R is an ideal gas constant, and T is a gas temperature), when gas temperature T one timing, the product of P and V is a fixed value.It is tightr that the double-ply bellows interlayer vacuumizes the two-layer applying in back, and the volume between two-layer is very little, and interlayer pressure levels off to 0, and entering interlayer gas pressure is P when vacuum system is revealed
0, be V if get into the volume of interlayer gas very little
0, because the interlayer volume is very little after vacuumizing, the volume V behind the double-ply bellows interlayer gas equilibrium
1≈ V
0So, gas equilibrium final vacuum system pressure P
1=P
0V
0/ V
1≈ P
0, the force value that causes the pressure vacuum gauge on the monitoring device to show changes greatly, and it is very responsive to make that like this leakage of against vacuum system becomes, and easily whether double-ply bellows is taken place to leak and causes erroneous judgement.
Summary of the invention
The objective of the invention is to propose a kind of volume compensation device that is used on the double-ply bellows expansion joint; It can be provided than the capacious compensation volume of Duoing of double-ply bellows interlayer; Compensation is because vacuum system is revealed the degree of vacuum variation that causes; Avoid changing the erroneous judgement that causes, make the more reliable of monitoring device change because of the vacuum pressure of detection device.
The present invention adopts following technological scheme for accomplishing the foregoing invention task:
A kind of volume compensation device that is used on the double-ply bellows expansion joint mainly comprises volume compensation bellows and driving spring; With thinking that the interlayer of double-ply bellows provides the upper end of the volume compensation bellows of volume compensation to be welded on the shrouding; And link to each other with pressure vacuum gauge through the through hole that is had on the shrouding; The lower end is welded on the end pipe; And be communicated with the interlayer of double-ply bellows straight length, thereby the volume compensation bellows is communicated with the interlayer of double-ply bellows through the through hole that is had on the end pipe; In order to line pipe stretching of driving volume compensation wave or compression the driving spring of volume compensation being provided is two, be separately positioned on the both sides of volume compensation bellows, and the two ends of driving spring is separately fixed on end pipe and the shrouding; When vacuum system was leaked, at this moment the counter-force of vacuum system and spring force were just uneven, spring action at this moment, and it is elongated to drive bellows length, and it is big that volume becomes, and reaches new balance.
Described volume compensation bellows adopts low rigidity bellows.
A kind of volume compensation device that is used on the double-ply bellows expansion joint that the present invention proposes; Adopt the volume compensation bellows can provide than the capacious compensation volume of Duoing of double-ply bellows interlayer with driving spring; Compensation is because vacuum system is revealed the degree of vacuum variation that causes; Avoided changing the erroneous judgement that causes, cooperated monitoring device to make the more reliable of monitoring device change because of the vacuum pressure of detection device.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is user mode figure of the present invention.
Among the figure: 1, end pipe, 2, riser, 3, enforced loop plane, 4, hinge plate one; 5, bearing pin, 6, hinge plate two, 7, intervalve, 8, dunnage; 9, little ring flat-plate, 10, guide shell, 11, the cross connecting head, 12, double-ply bellows; 13, shrouding, 14, pressure vacuum gauge, 15, the volume compensation bellows, 16, driving spring.
Embodiment
With specific embodiment the present invention is illustrated in conjunction with the accompanying drawings:
As shown in Figure 1, a kind of volume compensation device that is used on the double-ply bellows expansion joint mainly comprises volume compensation bellows 15 and driving spring 16; With thinking that the interlayer of double-ply bellows provides the upper end of the volume compensation bellows 15 of volume compensation to be welded on the shrouding 13; And link to each other with pressure vacuum gauge 14 through the through hole that is had on the shrouding 13, being connected between pressure vacuum gauge and volume compensation bellows is used for monitoring the vacuum system variation in pressure; The lower end of volume compensation bellows 15 is welded on the end pipe 1, and is communicated with the interlayer of double-ply bellows straight length through the through hole that is had on the end pipe 1, thereby the volume compensation bellows is communicated with the interlayer of double-ply bellows; In order to line pipe stretching of driving volume compensation wave or compression the driving spring 16 of volume compensation being provided is two; Be separately positioned on the both sides of volume compensation bellows; And the two ends of driving spring 16 are separately fixed on end pipe 1 and the shrouding 13; In the power that the original state driving spring provides a counter-force and vacuum system to balance each other, bellows length is stable, does not change.When vacuum system was leaked, at this moment the counter-force of vacuum system and spring force were just uneven, spring action at this moment, and it is elongated to drive bellows length, and it is big that volume becomes, and reaches new balance.
Described volume compensation bellows 15 adopts the low rigidity bellows of pipe.
As shown in Figure 2; (I partly is Fig. 1 among Fig. 2); Provide the present invention and be used for the specific embodiment on the universal double-jointed hinge type expansion joint; This volume compensation device also can be used for the expansion joint that the needs monitorings double-ply bellows of other pattern is revealed, the expansion joint of the various types of in GB/T12777-2008 " metal corrugated pipe expansion joint general technical specifications ", listing like single entry hinge type, single entry universal coupling type, axialmode, compound pull rod type etc.
Described universal double-jointed hinge type expansion joint mainly is made up of end pipe 1, intervalve 7, double-ply bellows 12 and outside stressed member riser 2, hinge plate 1, hinge plate 26, bearing pin 5, cross connecting head 11; Volume compensation bellows 15 is connected with the double-ply bellows interlayer; Pressure vacuum gauge 14 is connected with the volume compensation bellows and is used for monitoring the vacuum system variation in pressure, and the two ends of driving spring 16 are separately fixed at the two ends of volume compensation bellows 15 through shrouding 13 and end pipe 1.When dispatching from the factory the double-ply bellows interlayer is vacuumized, driving spring and volume compensation bellows are compressive state at this moment, and when the volume compensation device carried out volume compensation, driving spring and volume compensation bellows can have elongation in various degree according to the volume compensation size.
After the volume compensation device was set on the double-ply bellows, the volume in the volume compensation bellows was V
1, the gas pressure that after vacuum system is leaked, gets into the double-ply bellows interlayer is P
0, and volume V
0Very hour, this moment is because V
1>>V
0So, according to ideal-gas equation, the pressure P behind the vacuum system gas equilibrium
1=P
0V
0/ (V
0+ V
1) ≈ 0, the vacuum system force value just changes hardly like this, can not cause erroneous judgement to vacuum system pressure monitoring result.
Claims (2)
1. a volume compensation device that is used on the double-ply bellows expansion joint is characterized in that: mainly comprise volume compensation bellows (15) and driving spring (16); With thinking that the interlayer of double-ply bellows provides the upper end of the volume compensation bellows (15) of volume compensation to be welded on the shrouding (13); And link to each other with pressure vacuum gauge (14) through the through hole that is had on the shrouding (13); The lower end is welded on the end pipe (1); And be communicated with the interlayer of double-ply bellows straight length, thereby the volume compensation bellows is communicated with the interlayer of double-ply bellows through the through hole that is had on the end pipe (1); In order to line pipe stretching of driving volume compensation wave or compression the driving spring (16) of volume compensation being provided is two, be separately positioned on the both sides of volume compensation bellows, and the two ends of driving spring (16) is separately fixed on end pipe (1) and the shrouding (13); When vacuum system was leaked, at this moment the counter-force of vacuum system and spring force were just uneven, spring action at this moment, and it is elongated to drive bellows length, and it is big that volume becomes, and reaches new balance.
2. described volume compensation bellows according to claim 1 (15) adopts low rigidity bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110446696 CN102518902B (en) | 2011-12-28 | 2011-12-28 | Volume compensation device for expansion joint of double-layer corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110446696 CN102518902B (en) | 2011-12-28 | 2011-12-28 | Volume compensation device for expansion joint of double-layer corrugated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102518902A true CN102518902A (en) | 2012-06-27 |
| CN102518902B CN102518902B (en) | 2013-08-28 |
Family
ID=46289929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110446696 Active CN102518902B (en) | 2011-12-28 | 2011-12-28 | Volume compensation device for expansion joint of double-layer corrugated pipe |
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| Country | Link |
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| CN (1) | CN102518902B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN107514518A (en) * | 2017-09-30 | 2017-12-26 | 洛阳双瑞特种装备有限公司 | A kind of novel composite water hinge type expansion joint for big orifice compensation of pipeline |
| CN109506136A (en) * | 2018-12-30 | 2019-03-22 | 江苏恒丰波纹管有限公司 | Multiple hinge type expansion joint equipped with thickness and crack detection device |
| CN111913505A (en) * | 2019-05-08 | 2020-11-10 | 浙江三花制冷集团有限公司 | Pressure driving device, manufacturing method thereof and pressure controller using pressure driving device |
| CN113418072A (en) * | 2021-08-24 | 2021-09-21 | 南通市威士真空设备有限公司 | Pipe joint for diaphragm vacuum pump with suction self-checking function |
Citations (5)
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|---|---|---|---|---|
| DE4244049A1 (en) * | 1991-06-27 | 1994-06-30 | Hans Rattay Gmbh & Co Kg | Compensator for gas or water pipes |
| CN2191956Y (en) * | 1993-10-21 | 1995-03-15 | 王延军 | Pressure balance type bellows expansion joint |
| CN2239562Y (en) * | 1996-01-13 | 1996-11-06 | 江苏远东波纹管集团公司 | External pressure balance anti-corrosion corrugated compensator |
| CN2530126Y (en) * | 2001-02-20 | 2003-01-08 | 文长朴 | Two-way extension filling pipeline compensator |
| CN202510914U (en) * | 2011-12-28 | 2012-10-31 | 洛阳双瑞特种装备有限公司 | Volume compensation device for double-layer corrugated-pipe expansion joint |
-
2011
- 2011-12-28 CN CN 201110446696 patent/CN102518902B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4244049A1 (en) * | 1991-06-27 | 1994-06-30 | Hans Rattay Gmbh & Co Kg | Compensator for gas or water pipes |
| CN2191956Y (en) * | 1993-10-21 | 1995-03-15 | 王延军 | Pressure balance type bellows expansion joint |
| CN2239562Y (en) * | 1996-01-13 | 1996-11-06 | 江苏远东波纹管集团公司 | External pressure balance anti-corrosion corrugated compensator |
| CN2530126Y (en) * | 2001-02-20 | 2003-01-08 | 文长朴 | Two-way extension filling pipeline compensator |
| CN202510914U (en) * | 2011-12-28 | 2012-10-31 | 洛阳双瑞特种装备有限公司 | Volume compensation device for double-layer corrugated-pipe expansion joint |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN107514518A (en) * | 2017-09-30 | 2017-12-26 | 洛阳双瑞特种装备有限公司 | A kind of novel composite water hinge type expansion joint for big orifice compensation of pipeline |
| CN109506136A (en) * | 2018-12-30 | 2019-03-22 | 江苏恒丰波纹管有限公司 | Multiple hinge type expansion joint equipped with thickness and crack detection device |
| CN111913505A (en) * | 2019-05-08 | 2020-11-10 | 浙江三花制冷集团有限公司 | Pressure driving device, manufacturing method thereof and pressure controller using pressure driving device |
| CN111913505B (en) * | 2019-05-08 | 2024-03-22 | 浙江三花商用制冷有限公司 | Pressure driving device, manufacturing method thereof and pressure controller using pressure driving device |
| CN113418072A (en) * | 2021-08-24 | 2021-09-21 | 南通市威士真空设备有限公司 | Pipe joint for diaphragm vacuum pump with suction self-checking function |
| CN113418072B (en) * | 2021-08-24 | 2021-10-29 | 南通市威士真空设备有限公司 | Pipe joint for diaphragm vacuum pump with suction self-checking function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102518902B (en) | 2013-08-28 |
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Address after: 471000, Binhe Road, hi tech Development Zone, Henan, Luoyang, 32 Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: 471000, Binhe Road, hi tech Development Zone, Henan, Luoyang, 32 Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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