CN107677430A - The leakage detection apparatus of surface condenser tube-to-tubesheet joint - Google Patents
The leakage detection apparatus of surface condenser tube-to-tubesheet joint Download PDFInfo
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- CN107677430A CN107677430A CN201710933211.4A CN201710933211A CN107677430A CN 107677430 A CN107677430 A CN 107677430A CN 201710933211 A CN201710933211 A CN 201710933211A CN 107677430 A CN107677430 A CN 107677430A
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- Prior art keywords
- vacuum
- vacuum case
- tube
- case
- cover plate
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
Abstract
The invention discloses a kind of leakage detection apparatus of surface condenser tube-to-tubesheet joint, including：A pair of vacuum cases --- the first vacuum case and the second vacuum case, the structure of each vacuum case include：The transparent cover plate of cover plate, cover plate sealing are fixed on frame plate, sealing gasket are fixedly installed on the inside of the frame plate of cover plate surrounding；A pair of vacuum cases are lifted on the outside of a pair of tube sheets positioned at heat-exchanging tube bundle both ends by hanging device respectively；The bottom of first vacuum case is provided with the water pipe head for being connected with water source, is provided with the top of the first vacuum case and vacuumizes adapter, vacuumizes adapter and is connected by connecting tube with the bottom of storage tank, the upper end of storage tank is connected with vavuum pump；In the presence of vavuum pump, two vacuum cases can seal respectively to be located on the tube sheet at identical heat-exchanging tube bundle region both ends.The advantage of the invention is that：Simple in construction, low manufacture cost is easy to use, and can effectively carry out leak detection work.
Description
Technical field
Technical field is manufactured the present invention relates to surface condenser, and in particular to surface condenser exchanger tubes and tubesheets
The leak detection of joint.
Background technology
Surface condenser is one of key equipment of generating process units.Statistics shows, in ordinary maintenance and repairing
In, caused by the failure that has 60% or so is due to surface condenser tubing corrosion and damage, and the corrosion of surface condenser tubing
Arch-criminal is then leakage.Welding and swelling quality between tube-to-tubesheet joint are to avoid producing between exchanger tubes and tubesheets
The key of raw leakage, it is therefore necessary to which the joint for exchanging heat pipe and tube sheet carries out leak test.
Traditional leak test comprises the following steps that：After the completion of shell-side cylinder assembling, the water filling in shell-side cylinder, then
Check between exchanger tubes and tubesheets whether there is seepage, and to there is the connecting portion of seepage to repair mending-leakage.
But surface condenser shell-side cylinder is sufficiently bulky, structure is special, can not integrally assemble completion, this leads to not
The joint that heat pipe and tube sheet are exchanged using traditional leak detection mode carries out leak test.
The content of the invention
The technical problem to be solved in the invention is：There is provided a kind of can exchange heat pipe and the joint of tube sheet is effectively hunted leak
Surface condenser tube-to-tubesheet joint leakage detection apparatus.
To solve the above problems, the technical solution adopted by the present invention is：The inspection of surface condenser tube-to-tubesheet joint
Leakage device, including：A pair of vacuum cases --- the first vacuum case and the second vacuum case, it is characterised in that：Each vacuum (-tight) housing
The structure of shell includes：Cover plate, cover plate is transparent, the framework sealed around for being fixed on frame plate, cover plate and surrounding on the inside of cover plate
Plate shape is fixedly installed sealing gasket into the open semi-closed structure in inner side on the inside of the frame plate of cover plate surrounding；A pair of vacuum (-tight) housings
Shell is lifted on by hanging device respectively can drive each vacuum positioned at the outside of a pair of tube sheets at heat-exchanging tube bundle both ends, hanging device
Short transverse and width of the case on the outside of tube sheet move back and forth；The bottom of first vacuum case, which is provided with, to be used for and water source
The water pipe head being connected, it is provided with the top of the first vacuum case and vacuumizes adapter, vacuumizes adapter and pass through connecting tube and storage
The bottom of water tank is connected, and the upper end of storage tank is connected with vavuum pump；In the presence of vavuum pump vacuumizes, two true
Empty case can be located at outside the tube sheet at identical heat-exchanging tube bundle region both ends respectively, and the first vacuum case and the second vacuum case
The sealing gasket of inner side distinguishes palette on the tube sheet of corresponding end.
Further, the leakage detection apparatus of foregoing surface condenser tube-to-tubesheet joint, wherein, the first vacuum case
Top is provided with the installing port for installing pressure gauge.
Further, the leakage detection apparatus of foregoing surface condenser tube-to-tubesheet joint, wherein, the first vacuum case and
Be provided with hanger on second vacuum case, described hanging device is crane, crane by hanger by the first vacuum case and
Second vacuum case is lifted on the outside of a pair of tube sheets at heat-exchanging tube bundle both ends respectively, and crane can drive the first vacuum case and
The short transverse on the outside of the tube sheet of corresponding end and width move back and forth two vacuum cases respectively.
Further, the leakage detection apparatus of foregoing surface condenser tube-to-tubesheet joint, wherein, palette exists respectively
Also bondage prevents the first vacuum case and the second vacuum (-tight) housing on the first vacuum case and the second vacuum case on the tube sheet of both ends
The suspender belt that shell is separated with tube sheet.
Further, the leakage detection apparatus of foregoing surface condenser tube-to-tubesheet joint, wherein, the first vacuum case and
Sealing gasket on the inside of second vacuum case uses Duprene rubber foamed type encapsulant.
Further, the leakage detection apparatus of foregoing surface condenser tube-to-tubesheet joint, wherein, the bottom of storage tank is set
The drainpipe with valve is equipped with, level gauge and storage tank pressure gauge are additionally provided with storage tank.
It is an advantage of the invention that：Simple in construction, low manufacture cost is easy to use.It is true by two by way of vacuumizing
Empty case is sealed on the tube sheet at identical heat-exchanging tube bundle region both ends, after injecting water in the first vacuum case, through transparent
Cover plate finds the position that joint has bubble to continuously generate, that is, finds out the region and weld underproof joint.Respectively in tube sheet
Height and width move two vacuum cases, carry out multiple leak test, just can complete connecing for all exchanger tubes and tubesheets
The leak detection work of head.The tube head for having seepage checked is repaired, can thus greatly improve the quality of surface condenser,
Offer reliable guarantee can be safely and steadly run for surface condenser.
Brief description of the drawings
Fig. 1 is the operation principle signal of the leakage detection apparatus of surface condenser tube-to-tubesheet joint of the present invention
Figure.
Fig. 2 is view of a pair of vacuum case palettes on tube sheet.
Fig. 3 is the structural representation of the first vacuum case in Fig. 1.
Fig. 4 is the structural representation shown in Fig. 3 overlook directions.
Embodiment
The present invention is described in further detail with preferred embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the leakage detection apparatus of surface condenser tube-to-tubesheet joint, including：A pair
Vacuum case --- the first vacuum case 1 and the second vacuum case 2.The structure of each vacuum case includes：Cover plate 3, cover plate 3
Transparent, cover plate 3 uses plexiglas material in the present embodiment.The sealed around of the inner side of cover plate 3 is fixed on frame plate 4, cover plate 3 with
The frame plate 4 of surrounding forms the open, semi-closed structure in inner side, and the inner side of the frame plate 4 of the surrounding of cover plate 3 is fixedly installed sealing
Pad 5, sealing gasket 5 use Duprene rubber foamed type encapsulant, can also be by setting sealing gasket 5 between cover plate 3 and frame plate 4
Sealed.A pair of vacuum cases are lifted on the outside of a pair of tube sheets 6 positioned at heat-exchanging tube bundle both ends by hanging device respectively.Institute
The hanging device stated can drive short transverse and width of each vacuum case in the outside of tube sheet 6 to move back and forth.This implementation
Hanger 7 is provided with the first vacuum case 1 and the second vacuum case 2 in example, described hanging device is crane, and crane passes through
First vacuum case 1 and the second vacuum case 2 are lifted on the outside of a pair of tube sheets 6 at heat-exchanging tube bundle both ends by hanger 7 respectively, hang
Car can drive the short transverse and width of the first vacuum case 1 and the second vacuum case 2 respectively in the corresponding outside of tube sheet 6
Move back and forth.
The bottom of first vacuum case 1 is provided with the water pipe head 11 for being connected with water source, the first vacuum case 1
Top, which is provided with, vacuumizes adapter 12, vacuumizes adapter 12 and is connected by connecting tube 121 with the bottom of storage tank 8, water storage
The upper end of case 8 is connected with vavuum pump 9.The bottom of storage tank 8 is provided with the drainpipe 81 with valve, is also set up on storage tank 8
There are a level gauge and storage tank pressure gauge 83, the level gauge in the present embodiment on storage tank 8 uses simple liquid level gauge 82.Observation
Simple liquid level gauge 82 on storage tank 8, when the water in storage tank 8 will exceed the port being connected with vavuum pump 9, it can open
Valve on drainpipe 81, allows water to discharge, so that it is guaranteed that water will not be inhaled into vavuum pump 9.In the vacuum (-tight) housing of vavuum pump 9 and first
The purpose of storage tank 8 is set to be between shell 1：Water is prevented to be inhaled into vavuum pump.The top of first vacuum case 1, which is provided with, to be used for
The installing port 13 of pressure gauge 131 is installed.In the presence of vavuum pump 9 vacuumizes, two vacuum cases can be located at identical respectively
Outside the tube sheet 6 at heat-exchanging tube bundle region both ends, and the first vacuum case 1 and the sealing gasket 5 of the inner side of the second vacuum case 2 distinguish it is close
Envelope is fitted on the tube sheet 6 of corresponding end.Because heat-exchanging tube bundle is obliquely installed in the present embodiment, therefore the first vacuum case 1 and
Two vacuum cases 2 are not during the contour of short transverse, actual leak detection, as long as ensuring the first vacuum case 1 and the second vacuum
The tube sheet that case 2 is sealed in identical heat-exchanging tube bundle region both ends is outer.In the present embodiment, palette is in both ends tube sheet respectively
On the first vacuum case 1 and the second vacuum case 2 on 6 also bondage prevent the first vacuum case 1 and the second vacuum case 2 with
The suspender belt 10 that tube sheet 6 is separated.
Step of hunting leak is as follows：First the first vacuum case 1 and the second vacuum case 2 are lifted on outside the tube sheet 6 at both ends respectively,
And the water pipe head 11 of the bottom of the first vacuum case 1 is connected to water source by water pipe 111.Then, vavuum pump 9 is first taken out
Vacuum causes the first vacuum case 1 and the second vacuum case 2 difference palette at a pair of identical heat-exchanging tube bundle region both ends
The outside of tube sheet 6 simultaneously reaches maximum vacuum, thus loads onto one respectively equivalent at the both ends in identical heat-exchanging tube bundle region
Bobbin carriage.In order to prevent vacuum case from being come off in pressure release, the bondage suspender belt 10 on two vacuum cases.Followed by, water source is opened,
Water is set to slowly enter into the first case 1, the first case 1 is connected by heat-exchanging tube bundle with the second vacuum (-tight) housing shell phase, it is ensured that first
50~60mm distance is left between water level in vacuum case 1 and the bottom for vacuumizing adapter 12, the purpose so done is：
First, vacuum is ensured, it is convenient to check tube head；2nd, prevent water from being entered in adapter 12 in storage tank 8 and damage vacuum from vacuumizing
Pump 9.Then, observed through the cover plate 3 of the first vacuum case 1 and the second vacuum case 2, look through the first vacuum case
1 and second has the position that bubble continuously generates in vacuum case 2, and the joint of exchanger tubes and tubesheets has bubble to continuously generate, said
It is bright：There is seepage the joint, i.e., the weld is unqualified.Underproof joint location is all recorded, the later stage is repaiied
Benefit processing.
After the heat-exchanging tube bundle in a region all checks, by water from the water pipe head 11 of the first vacuum case 1 to
Outer discharge, suspender belt 10 is then untied, the first vacuum case 1 and the second vacuum case 2 are moved to by adjacent area by crane, it
After the step of repeating above-mentioned leak detection, until all tube-to-tubesheet joints are all checked and finished.
The advantage of the invention is that：Simple in construction, low manufacture cost is easy to use.By two by way of vacuumizing
Vacuum case is sealed on the tube sheet at identical heat-exchanging tube bundle region both ends, and in the first vacuum case 1 after injection water, transmission is transparent
Cover plate 3 find the position that bubble continuously generates, that is, find out the underproof joint in the region.Respectively tube sheet 6 height and
Width moves two vacuum cases, carries out multiple leak test, can just complete the inspection of the joint of all exchanger tubes and tubesheets 6
Leak work.The tube head for having seepage checked is repaired, can thus greatly improve the quality of surface condenser, is surface
Condenser can safely and steadly run offer reliable guarantee.
Claims (6)
1. the leakage detection apparatus of surface condenser tube-to-tubesheet joint, including：A pair of vacuum cases --- the first vacuum case
With the second vacuum case, it is characterised in that：The structure of each vacuum case includes：Cover plate, cover plate is transparent, and four on the inside of cover plate
Careful sealing is scheduled on frame plate, cover plate and semi-closed structure open on the inside of the frame plate formation of surrounding, the framework of cover plate surrounding
Sealing gasket is fixedly installed on the inside of plate；A pair of vacuum cases are lifted on one positioned at heat-exchanging tube bundle both ends by hanging device respectively
To the outside of tube sheet, hanging device can drive short transverse of each vacuum case on the outside of tube sheet and width to move back
It is dynamic；The bottom of first vacuum case is provided with the water pipe head for being connected with water source, and the top of the first vacuum case is set
Adapter is vacuumized, adapter is vacuumized and is connected by connecting tube with the bottom of storage tank, the upper end of storage tank and vacuum
Pump is connected；In the presence of vavuum pump vacuumizes, two vacuum cases can be located at identical heat-exchanging tube bundle region both ends respectively
Tube sheet outside, and on the inside of the first vacuum case and the second vacuum case sealing gasket difference palette corresponding end tube sheet
On.
2. the leakage detection apparatus of surface condenser tube-to-tubesheet joint according to claim 1, it is characterised in that：First
The installing port for installing pressure gauge is provided with the top of vacuum case.
3. the leakage detection apparatus of surface condenser tube-to-tubesheet joint according to claim 1 or 2, it is characterised in that：
Hanger is provided with first vacuum case and the second vacuum case, described hanging device is crane, and crane will by hanger
First vacuum case and the second vacuum case are lifted on the outside of a pair of tube sheets at heat-exchanging tube bundle both ends respectively, and crane can drive
The short transverse on the outside of the tube sheet of corresponding end and width move back and forth respectively for one vacuum case and the second vacuum case.
4. the leakage detection apparatus of surface condenser tube-to-tubesheet joint according to claim 1 or 2, it is characterised in that：
Also bondage prevents the first vacuum (-tight) housing on the first vacuum case and the second vacuum case of the palette on the tube sheet of both ends respectively
The suspender belt that shell and the second vacuum case are separated with tube sheet.
5. the leakage detection apparatus of surface condenser tube-to-tubesheet joint according to claim 1 or 2, it is characterised in that：
Sealing gasket on the inside of first vacuum case and the second vacuum case uses Duprene rubber foamed type encapsulant.
6. the leakage detection apparatus of surface condenser tube-to-tubesheet joint according to claim 1 or 2, it is characterised in that：
The bottom of storage tank is provided with the drainpipe with valve, and level gauge and storage tank pressure gauge are additionally provided with storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933211.4A CN107677430A (en) | 2017-10-10 | 2017-10-10 | The leakage detection apparatus of surface condenser tube-to-tubesheet joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710933211.4A CN107677430A (en) | 2017-10-10 | 2017-10-10 | The leakage detection apparatus of surface condenser tube-to-tubesheet joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107677430A true CN107677430A (en) | 2018-02-09 |
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ID=61137988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710933211.4A Pending CN107677430A (en) | 2017-10-10 | 2017-10-10 | The leakage detection apparatus of surface condenser tube-to-tubesheet joint |
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| Country | Link |
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| CN (1) | CN107677430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186891A (en) * | 2018-09-14 | 2019-01-11 | 安徽苏立科技股份有限公司 | A kind of heating tube sealing test equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070723A (en) * | 1989-09-20 | 1991-12-10 | Electric Power Research Institute, Inc. | Condenser on-line leak detector and method |
| CN201034795Y (en) * | 2006-06-30 | 2008-03-12 | 宝山钢铁股份有限公司 | Vacuum degree detecting auxiliary device used for vacuum circulation degassing device middle segment |
| CN201122119Y (en) * | 2007-12-04 | 2008-09-24 | 上海电气电站设备有限公司 | Evacuation leakage test device |
| CN101788371A (en) * | 2010-01-29 | 2010-07-28 | 重庆长安汽车股份有限公司 | Automotive air-conditioning condenser sealing test device |
| CN204807286U (en) * | 2015-07-23 | 2015-11-25 | 广西防城港核电有限公司 | Condenser heat exchange tube leak hunting device and gas delivery cover thereof |
| CN207280703U (en) * | 2017-10-10 | 2018-04-27 | 苏州海陆重工股份有限公司 | The leakage detection apparatus of surface condenser tube-to-tubesheet joint |
-
2017
- 2017-10-10 CN CN201710933211.4A patent/CN107677430A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070723A (en) * | 1989-09-20 | 1991-12-10 | Electric Power Research Institute, Inc. | Condenser on-line leak detector and method |
| CN201034795Y (en) * | 2006-06-30 | 2008-03-12 | 宝山钢铁股份有限公司 | Vacuum degree detecting auxiliary device used for vacuum circulation degassing device middle segment |
| CN201122119Y (en) * | 2007-12-04 | 2008-09-24 | 上海电气电站设备有限公司 | Evacuation leakage test device |
| CN101788371A (en) * | 2010-01-29 | 2010-07-28 | 重庆长安汽车股份有限公司 | Automotive air-conditioning condenser sealing test device |
| CN204807286U (en) * | 2015-07-23 | 2015-11-25 | 广西防城港核电有限公司 | Condenser heat exchange tube leak hunting device and gas delivery cover thereof |
| CN207280703U (en) * | 2017-10-10 | 2018-04-27 | 苏州海陆重工股份有限公司 | The leakage detection apparatus of surface condenser tube-to-tubesheet joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186891A (en) * | 2018-09-14 | 2019-01-11 | 安徽苏立科技股份有限公司 | A kind of heating tube sealing test equipment |
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