CN113218587A - Leakage detection combined device and leakage detection method for pressure vessel tube bundle of electrician enterprise - Google Patents
Leakage detection combined device and leakage detection method for pressure vessel tube bundle of electrician enterprise Download PDFInfo
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- CN113218587A CN113218587A CN202110289705.XA CN202110289705A CN113218587A CN 113218587 A CN113218587 A CN 113218587A CN 202110289705 A CN202110289705 A CN 202110289705A CN 113218587 A CN113218587 A CN 113218587A
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- blocking plate
- heater
- pressurizing
- leakage detection
- bubble
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 230000000903 blocking effect Effects 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 230000001680 brushing effect Effects 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the technical field of pipe bundle leakage detection, and particularly relates to a leakage detection combined device and a leakage detection method for a pipe bundle of a pressure container of an electrical enterprise, wherein the leakage detection combined device comprises a pressing blocking plate, the pressing blocking plate is disc-shaped, a plurality of bolt holes are uniformly distributed on the circumference of the pressing blocking plate, an air hole is formed in the center of the pressing blocking plate, a sealing gasket is arranged on the air hole, the air hole of the pressing blocking plate is respectively connected with an air compressor and a compressed air pipeline through a hose, and the pressing blocking plate is fixed on a flange interface of a safety door base of a heater through a bolt and a nut; still include the brush bubble box, the brush bubble box sets up the water side entrance hole door department at the heater. The method can quickly determine the tube bundle leakage point in the pressure vessel.
Description
Technical Field
The invention belongs to the technical field of leakage detection of tube bundles, and particularly relates to a leakage detection combined device and a leakage detection method for the tube bundles of pressure vessels of an electrical enterprise.
Background
In the power generation enterprises of the present power system, pressure vessels such as high and low pressure heaters, heating network heaters, oil coolers and other various types of heat exchangers are widely used. In the operation of the unit, due to the influences of various factors such as manufacturing quality, operation parameters, medium cleanliness, scouring, corrosion, poor maintenance and the like, an internal leakage event of a pressure container usually occurs, the operation of the unit is seriously threatened, and even an unplanned shutdown event of the unit is caused. Taking a heater of an electric power enterprise as an example, leakage of a conventional high-voltage heater and a conventional low-voltage heater seriously threatens safe and stable operation of a unit, and leakage of a heater of a heat supply network in a northern area brings about a heat supply interruption event, so that great social adverse reactions and influences are caused, and once the leakage problem of a pressure container occurs, leakage points need to be isolated and processed as soon as possible. The existing conventional technical method is greatly influenced by the design, installation and operation conditions of a pressure container and the operation condition of accessory equipment facilities, and the leakage point treatment can be completed only by wasting large manpower, material resources and time, so that the safety production and social responsibility implementation of enterprises are seriously influenced. Therefore, a method for eliminating the leakage defect of the pressure container rapidly, safely, efficiently and high-quality when the pressure container has the leakage problem is needed, the personal safety and equipment safety of personnel are ensured, the labor intensity and labor cost of the personnel are reduced, and various losses and influences are reduced to the minimum.
At present, the following pressure container leakage detection technologies exist in the prior art:
(1) detection technologies of colored gas and the like: in practical application, in order to ensure safe and stable operation of a pressure container such as a heater, except for the original design, other equipment is not allowed to be connected to the heater through holes randomly, and the technology relates to various facilities such as gas detection equipment, colored gas preparation and standby pipelines, so that a series of problems such as cost, storage, inspection and the like exist, and the operability is not large in practical application.
(2) The water feeding leakage detecting method comprises the following steps: the operation temperature of the heater is usually above 100 ℃, the temperature is required to be reduced to 40 ℃ or below for water feeding leakage detection in order to prevent the tube bundle from cracking, and the waste of rush repair time is increased invisibly; in actual operation, large working medium waste is caused, a proper water source is usually not available, fire water is generally adopted as the water source nearby, and the operation risk and the working medium waste of other systems are increased; the water feeding leakage detection method is greatly influenced by the internal leakage condition of the valve, if any valve is subjected to steam detection by the heater, an isolation blocking plate needs to be additionally arranged on the valve, otherwise, leakage detection, pressurization and pressure maintaining cannot be carried out, and particularly, the temperature of the valve of a steam inlet pipeline is high, so that the risk is high, the maintenance time is additionally increased, and meanwhile, the influence defect is timely eliminated; the mode of leaking hunting of intaking usually needs to sweep, dry one by one to the inside deposit water of tube bank, and the heater tube bank usually has thousands, extravagant great manpower and materials.
Disclosure of Invention
The invention provides a leak detection combined device and a leak detection method for a tube bundle of a pressure vessel of an electrical enterprise, and aims to quickly determine the leak point of the tube bundle in the pressure vessel.
In order to achieve the purpose, the invention adopts the technical scheme that:
a leak detection combined device for a pressure vessel pipe bundle of an electrical enterprise comprises a pressing blocking plate, wherein the pressing blocking plate is disc-shaped, a plurality of bolt holes are uniformly distributed in the circumference of the pressing blocking plate, an air hole is formed in the center of the pressing blocking plate, a sealing gasket is arranged on the air hole, the air hole of the pressing blocking plate is respectively connected with an air compressor and a compressed air pipeline through a hose, and the pressing blocking plate is fixed on a flange connector of a safety door base of a heater through a bolt and a nut;
the water heater also comprises a brush bubble box which is arranged at the inlet hole door at the water side of the heater.
Furthermore, a first valve is arranged between the pressurizing blocking plate and the air compressor, and a second valve is arranged on the compressed air pipeline.
A leak detection method for a pressure vessel tube bundle of an electrician enterprise comprises the following steps:
and S1, closing and isolating all valves on the water side and the steam side of the heater, opening the water chamber inlet door of the heater and the partition plate, strongly ventilating by using an axial flow fan, detaching the safety door of the heater, and installing the pressurizing blocking plate on a flange connector of a base of the safety door.
S2, opening the second valve to introduce the air source from the factory compressed air, and sending the air source to the container through the compressed air pipeline and the hose, or opening the first valve to supply the air source to the container through the hose by using the air compressor, and observing the pressure gauge on the steam side of the heater to display the pressure in the container.
S3, the bubble brushing agent is arranged in the bubble brushing box and is smeared at a water side entry hole door of the heater through a brush, the bubble brushing observation is carried out on the tube bundle, the liquid in the bubble brushing box can be generally coated on the tube bundle for a long time due to the viscosity, the bubbles are brushed at the corresponding positions of the upper water chamber and the lower water chamber simultaneously, the different leakage amounts of the tube bundle are reflected in the change of the bubbles, the bubbles are easily broken through a large leakage point, the bubbles are less expanded, and whether the leakage problem exists in the tube bundle is rapidly determined through observing the change of the bubbles.
Compared with the prior art, the invention has the following beneficial effects:
the invention fully utilizes the original facilities such as the safety door of the pressure container body and the like, adds the pressurizing blocking plate, a plurality of bolt holes are uniformly distributed on the circumference of the pressurizing blocking plate, the center of the pressurizing blocking plate is provided with an air hole, the pressurizing blocking plate is fixed on a flange interface of the safety door base of the heater through bolts and nuts, the air hole of the pressurizing blocking plate is respectively connected with an air compressor or a compressed air pipeline, compressed air can be introduced into the tube bundle of the heater, the tube bundle is subjected to bubble brushing observation through the bubble brushing box, and the rapid leakage detection of the tube bundle can be completed under the condition that the design structure of the pressure container is not changed or other pipelines are additionally arranged.
The air compressor or the compressed air pipeline controls air inflow by utilizing the valve, if the heater or other pressure container isolation valves have internal leakage, the valve is opened to keep gas injected into the container all the time, leakage detection is guaranteed to be carried out continuously without wasting time and labor to install a blind plate on the valve, and therefore the influence of the internal leakage of the valve on the pressing is eliminated.
The rapid cooling is realized by utilizing the powerful ventilation of the axial flow fan, accumulated water in the tube bundle can be rapidly removed, and the damage to the heater and the influence on the leakage detection result caused by the medium cold and hot temperature difference are avoided.
The invention has simple structure, low cost, repeated use, no need of purchasing high-end leakage detection equipment and saved production cost and capital. Meanwhile, leakage detection of the device is rapid and accurate, resource waste of manpower and material resources is avoided, and timeliness is remarkable in equipment rush repair.
Drawings
Fig. 1 is a schematic structural installation diagram of a leak detection combination device of a pressure vessel pipe bundle of an electrical enterprise.
Wherein: 1-an air compressor; 2-a hose; 3-a first valve; 4-pressing the blocking plate; 5-a heater; 6-flange interface; 7-an axial flow fan; 8-copper plug; 9-brushing a bubble box; 10-a tube bundle; 11-second valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, a leak hunting composite set is examined to electric power industry enterprise pressure vessel tube bank, including suppressing closure plate 4, suppress closure plate 4 and be discoid, suppress a plurality of bolt holes of evenly distributed on the circumference of closure plate 4, the center of suppressing closure plate 4 is equipped with the gas pocket, be equipped with seal gasket on the gas pocket, the gas pocket of suppressing closure plate 4 passes through hose 2 and connects air compressor 1 and compressed air pipeline respectively, suppress closure plate 4 and pass through the bolt and fix on the flange interface 6 of heater 5's emergency exit base with the nut. The device also comprises a brush bubble box 9, wherein the brush bubble box 9 is arranged at the water side inlet hole door of the heater 5.
A first valve 3 is arranged between the pressurizing blocking plate 4 and the air compressor 1, and a second valve 11 is arranged on the compressed air pipeline.
A leak detection method for a pressure vessel pipe bundle of a power industry enterprise comprises the following steps:
and S1, closing and isolating all valves on the water side and the steam side of the heater 5, opening the inlet hole door and the partition plate of the water chamber of the heater, performing strong ventilation by using the axial flow fan 7, detaching the safety door of the heater 5, and installing the pressurizing blocking plate 4 on the flange connector 6 of the base of the safety door.
And S2, according to the field installation condition of the equipment, opening the second valve 11 to introduce air source from the factory compressed air, and conveying the air source into the container through the compressed air pipeline and the hose 2, or opening the first valve 3 to supply air source through the air compressor 1 and conveying the air source into the container through the hose 2, and observing a pressure gauge on the steam side of the heater to display the pressure in the container.
S3, arranging a bubble brushing agent in the bubble brushing box, smearing the bubble brushing agent at a water side entry hole door of the heater 5 by using a brush, performing bubble brushing observation on the tube bundle 10, wherein the liquid in the bubble brushing box usually has viscosity and can be covered on the tube bundle for a long time, brushing bubbles at corresponding positions of an upper water chamber and a lower water chamber simultaneously, different leakage amounts of the tube bundle are reflected in the change of bubbles, a larger leakage point easily enables the bubbles to be broken, and a smaller leakage point can also cause the bubbles to bulge, and whether the leakage problem exists in the tube bundle is quickly determined by observing the change of the bubbles.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The utility model provides a leak hunting composite set of electrician's enterprise pressure vessel tube bank which characterized in that: the device comprises a pressurizing blocking plate (4), wherein the pressurizing blocking plate (4) is disc-shaped, a plurality of bolt holes are uniformly distributed in the circumference of the pressurizing blocking plate (4), an air hole is formed in the center of the pressurizing blocking plate (4), a sealing gasket is arranged on the air hole, the air hole of the pressurizing blocking plate (4) is respectively connected with an air compressor (1) and a compressed air pipeline through a hose (2), and the pressurizing blocking plate (4) is fixed on a flange connector (6) of a safety door base of a heater through bolts and nuts;
the device is characterized by further comprising a bubble brushing box (9), wherein the bubble brushing box (9) is arranged at a water side inlet hole door of the heater (5).
2. A leak detection assembly for a bundle of electrical utility pressure vessels according to claim 1, wherein: a first valve (3) is arranged between the pressurizing blocking plate (4) and the air compressor (1), and a second valve (11) is arranged on the compressed air pipeline.
3. The leak detection method for the bundle of the pressure vessels of the electrical enterprise as claimed in claim 1, characterized by comprising the following steps:
s1, closing and isolating all valves on the water side and the steam side of the heater (5), opening a water chamber entrance door and a partition plate of the heater (5) to perform powerful ventilation by using an axial flow fan (7), detaching the safety door of the heater (5), and installing the pressurizing blocking plate (4) on a flange interface (6) of a safety door base.
S2, opening a second valve (11), introducing air source from factory compressed air nearby, conveying the air source into the container through a compressed air pipeline and the hose (2), or opening a first valve (3), adopting the air compressor (1) to provide the air source, conveying the air source into the container through the hose (2), and observing a pressure gauge on the steam side of the heater to display the pressure in the container.
S3, arranging a bubble brushing agent in a bubble brushing box (9), smearing the bubble brushing agent at a water side entry hole door of a heater (5) by using a brush, brushing and observing a tube bundle (10), wherein the liquid in the bubble brushing box can be covered on the tube bundle for a long time due to the common viscosity, brushing bubbles at corresponding positions of an upper water chamber and a lower water chamber simultaneously, different leakage amounts of the tube bundle are reflected in the change of bubbles, the bubbles are broken easily due to a large leakage point, the bubbles are expanded due to a small leakage point, and whether the leakage problem exists in the tube bundle is rapidly determined by observing the change of the bubbles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289705.XA CN113218587A (en) | 2021-03-16 | 2021-03-16 | Leakage detection combined device and leakage detection method for pressure vessel tube bundle of electrician enterprise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289705.XA CN113218587A (en) | 2021-03-16 | 2021-03-16 | Leakage detection combined device and leakage detection method for pressure vessel tube bundle of electrician enterprise |
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| CN113218587A true CN113218587A (en) | 2021-08-06 |
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| CN202110289705.XA Pending CN113218587A (en) | 2021-03-16 | 2021-03-16 | Leakage detection combined device and leakage detection method for pressure vessel tube bundle of electrician enterprise |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114778033A (en) * | 2022-03-18 | 2022-07-22 | 中广核核电运营有限公司 | Pressure container pressure test device and pressure test method thereof |
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| WO2012117620A1 (en) * | 2011-02-28 | 2012-09-07 | 三菱重工業株式会社 | Method for inspecting leakage of heat exchanger |
| EP2642268A2 (en) * | 2012-03-20 | 2013-09-25 | HyPneu Service GmbH | Device and method for monitoring the seal of pneumatic elements that consume or transport compressed air |
| JP2014070950A (en) * | 2012-09-28 | 2014-04-21 | Sekisui Chem Co Ltd | Method for inspecting leakage of hydraulic-piping connecting part, leakage inspection tool, and leakage inspection device |
| CN104729813A (en) * | 2015-03-16 | 2015-06-24 | 舞阳钢铁有限责任公司 | Rapid leakage detection tool and detection and repair process of pipe type heat exchanger |
| CN205642756U (en) * | 2015-11-18 | 2016-10-12 | 天津天新机床制造有限公司 | Heat dissipation tube bank finished product pressing experiment device |
| CN110672284A (en) * | 2019-10-18 | 2020-01-10 | 华翔翔能电气股份有限公司 | Transformer box body air tightness detection device |
| CN210863071U (en) * | 2019-11-21 | 2020-06-26 | 阳江核电有限公司 | Valve sealing performance detection device |
-
2021
- 2021-03-16 CN CN202110289705.XA patent/CN113218587A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012117620A1 (en) * | 2011-02-28 | 2012-09-07 | 三菱重工業株式会社 | Method for inspecting leakage of heat exchanger |
| CN102384827A (en) * | 2011-11-23 | 2012-03-21 | 安徽淮化股份有限公司 | Leak detection device for U-shaped waste heat boiler pipe column |
| EP2642268A2 (en) * | 2012-03-20 | 2013-09-25 | HyPneu Service GmbH | Device and method for monitoring the seal of pneumatic elements that consume or transport compressed air |
| JP2014070950A (en) * | 2012-09-28 | 2014-04-21 | Sekisui Chem Co Ltd | Method for inspecting leakage of hydraulic-piping connecting part, leakage inspection tool, and leakage inspection device |
| CN104729813A (en) * | 2015-03-16 | 2015-06-24 | 舞阳钢铁有限责任公司 | Rapid leakage detection tool and detection and repair process of pipe type heat exchanger |
| CN205642756U (en) * | 2015-11-18 | 2016-10-12 | 天津天新机床制造有限公司 | Heat dissipation tube bank finished product pressing experiment device |
| CN110672284A (en) * | 2019-10-18 | 2020-01-10 | 华翔翔能电气股份有限公司 | Transformer box body air tightness detection device |
| CN210863071U (en) * | 2019-11-21 | 2020-06-26 | 阳江核电有限公司 | Valve sealing performance detection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114778033A (en) * | 2022-03-18 | 2022-07-22 | 中广核核电运营有限公司 | Pressure container pressure test device and pressure test method thereof |
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Application publication date: 20210806 |