CN105092157A - Power plant thermodynamic system valve inner leakage diagnosis method and system - Google Patents
Power plant thermodynamic system valve inner leakage diagnosis method and system Download PDFInfo
- Publication number
- CN105092157A CN105092157A CN201410184205.XA CN201410184205A CN105092157A CN 105092157 A CN105092157 A CN 105092157A CN 201410184205 A CN201410184205 A CN 201410184205A CN 105092157 A CN105092157 A CN 105092157A
- Authority
- CN
- China
- Prior art keywords
- valve
- measured
- described high
- condition
- end valve
- 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.)
- Granted
Links
Abstract
The present invention provides a power plant thermodynamic system valve inner leakage diagnosis method and system. By determining whether a mother tube or a tee joint is arranged in front of a to-be-detected high end valve within a preset distance, and determining whether the to-be-detected high end valve satisfies a first temperature measurement condition, a first humidity measurement condition and a second temperature measurement condition, the high temperature reasons of a valve body are detected one by one, so that the situation that the high temperature of the valve body is not caused by the inner leakage is analyzed and eliminated, and the valve inner leakage diagnosis is realized. Therefore, relative to the prior art of realizing the valve inner leakage diagnosis via only one determination condition, the valve inner leakage diagnosis accuracy is improved substantially.
Description
Technical field
The present invention relates to valves leakage diagnostic techniques field, more particularly, relate to a kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system.
Background technology
Inside fail to pinpoint a disease in diagnosis disconnected referring in therrmodynamic system is run, be in the high-end valve of closed condition after thermal equilibrium, if valve body temperature drift, then diagnose whether valve body temperature height is leak by high-end valve internal the process caused by methods such as detection, calculating, analyses.
At present conventional interior leakage diagnostic method is temperature survey diagnostic method, after thermal equilibrium at high-end valve closing, if valve body temperature is not higher than 50 DEG C, then thinks and leaks in high-end valve.Because this diagnostic method does not have sufficient scientific basis and identification standard, in actual use, have about 30% False Rate.That is, high-end valve temperature is high except valves leakage, and also have other reasons, such as, other high-end valves leakage causes etc.Therefore, a kind of interior leakage diagnostic method how is provided to be those skilled in the art's technical matterss urgently to be resolved hurrily to improve the accuracy rate of valves leakage diagnosis.
Summary of the invention
In view of this, the invention provides a kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system, to realize the Accurate Diagnosis to valves leakage.
A kind of internal leakage of valve of thermodynamic system in power plant diagnostic method, comprising:
After being in the to be measured high-end valve thermal equilibrium of closed condition, in predeterminable range, before judging the valve of described high-end valve to be measured, whether there are female pipe or threeway;
If have described mother's pipe or described threeway in described predeterminable range scope before described valve, judge whether described high-end valve to be measured meets the first measuring tempeature condition;
If described high-end valve to be measured meets described first measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described first measuring tempeature condition, then diagnose out described high-end valves leakage to be measured;
If there is no described mother's pipe or described threeway in described predeterminable range scope before described valve, judge whether described high-end valve to be measured meets first and measure damp condition;
If described high-end valve to be measured meets described first measure damp condition, judge whether described high-end valve to be measured meets described first measuring tempeature condition;
If described high-end valve to be measured meets described first measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described first measuring tempeature condition, then diagnose out described high-end valves leakage to be measured;
If described high-end valve to be measured does not meet described first measure damp condition, judge whether described high-end valve to be measured meets the second measuring tempeature condition;
If described high-end valve to be measured meets described second measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described second measuring tempeature condition, then diagnose out described high-end valves leakage to be measured.
Preferably, described first measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature is lower than 50 DEG C, or after described valve, temperature is not less than 50 DEG C and lower than the half of temperature before the valve of described high-end valve to be measured.
Preferably, described first to measure damp condition be that heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
Preferably, described second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve.
Preferably, if only have described mother's pipe in described predeterminable range scope before described valve, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that direct heat transfer causes is high.
Preferably, if only have described threeway in described predeterminable range scope before described valve, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that indirect heat transmission causes is high.
Preferably, if described high-end valve to be measured meets described first measure damp condition, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the micro-valve body temperature that causes of leaking of working medium is high.
Preferably, if described high-end valve to be measured does not meet described first measure damp condition, when described high-end valve to be measured meets described second measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that other valves leakage causes is high.
A kind of internal leakage of valve of thermodynamic system in power plant diagnostic system, comprising:
Whether the first judging unit, for after being in the to be measured high-end valve thermal equilibrium of closed condition, have female pipe or threeway in predeterminable range before judging the valve of described high-end valve to be measured;
Second judging unit, if for having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets the first measuring tempeature condition;
First interior leakage diagnosis unit, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in first, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
3rd judging unit, if for not having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets first and measure damp condition;
4th judging unit, if meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets described first measuring tempeature condition;
Second interior leakage diagnosis unit, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in second, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
5th judging unit, if do not meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets the second measuring tempeature condition;
3rd interior leakage diagnosis unit, if meet described second measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in 3rd, if do not meet described second measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured.
Preferably, described first measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature is lower than 50 DEG C, or after described valve, temperature is not less than 50 DEG C and lower than the half of temperature before the valve of described high-end valve to be measured.
Preferably, described first to measure damp condition be that heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
Preferably, described second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve.As can be seen from above-mentioned technical scheme, the invention provides a kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system, in predeterminable range, female pipe or threeway whether is had by before the valve that judges high-end valve to be measured, and whether high-end valve to be measured meets the first measuring tempeature condition, the first measurement damp condition and the second measuring tempeature condition, realize the detection one by one to valve body temperature height producing cause, thus to analyze and get rid of be not the situation that the valve body temperature that causes due to interior leakage conductance is high, realize the diagnosis to valves leakage.Therefore, realize, for valves leakage diagnosis, substantially increasing the accuracy rate to valves leakage diagnosis by means of only a Rule of judgment relative to prior art.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of internal leakage of valve of thermodynamic system in power plant diagnostic method process flow diagram disclosed in the embodiment of the present invention;
The structural representation of Fig. 2 a kind of internal leakage of valve of thermodynamic system in power plant diagnostic system disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, the embodiment of the invention discloses a kind of internal leakage of valve of thermodynamic system in power plant diagnostic method process flow diagram, comprise step:
S11, after being in the to be measured high-end valve thermal equilibrium of closed condition, in predeterminable range, before the valve judging described high-end valve to be measured, whether there are female pipe or threeway, if so, then perform step S12, otherwise, perform step S13;
Wherein, predeterminable range is determined, preferably 1.5 meters according to actual conditions.
S12, judge that whether described high-end valve to be measured meets the first measuring tempeature condition, if so, then perform step S16, otherwise, perform step S17;
First measuring tempeature condition is that after the valve of high-end valve to be measured, temperature is lower than 50 DEG C (i.e. temperature < 50 DEG C after valve), or after described valve, temperature is not less than 50 DEG C and lower than the half (namely after 50 DEG C≤valve before temperature < 1/2 valve temperature) of temperature before the valve of described high-end valve to be measured.
Wherein, before valve, temperature refers to and flows to by medium, the temperature that admission line and valve body weld bond measure near admission line side.
After valve, temperature refers to and flows to by medium, the temperature that outlet pipe and valve body weld bond measure near outlet pipe side.
S13, judge that whether described high-end valve to be measured meets first and measure damp condition, if fruit is, then perform step S14, otherwise, perform step S15;
First measurement damp condition is that the heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
S14, judge whether described high-end valve to be measured meets described first measuring tempeature condition, if so, then perform step S16, otherwise, perform step S17;
S15, judge that whether described high-end valve to be measured meets the second measuring tempeature condition, if so, then perform step S16, otherwise, perform step S17;
Second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve (namely after valve before temperature > valve temperature).
S16, diagnose out described high-end valve to be measured in leak.
S17, diagnose out described high-end valves leakage to be measured.
It should be noted is that, the first measuring tempeature condition in the present embodiment, first measures damp condition and the second measuring tempeature condition is all obtained by theory with practice, therefore, the deagnostic structure obtained according to above-mentioned three conditions has very high accuracy.
As can be seen from above-mentioned technical scheme, whether the present invention has female pipe or threeway by judging that the valve of high-end valve to be measured is front in predeterminable range, and whether high-end valve to be measured meets the first measuring tempeature condition, the first measurement damp condition and the second measuring tempeature condition, realize the detection one by one to valve body temperature height producing cause, thus to analyze and get rid of be not the situation that the valve body temperature that causes due to interior leakage conductance is high, realize the diagnosis to valves leakage.Therefore, realize, for valves leakage diagnosis, substantially increasing the accuracy rate to valves leakage diagnosis by means of only Rule of judgment relative to prior art, and then reduce the impact of valves leakage on the economy of power plant, security and environment.
Find through a large amount of theoretical analysises and engineering survey, cause the high reason of valve body temperature to have a lot, mainly comprise following reason:
One, valve leaks in existing;
Two, directly the valve body temperature that causes of heat transfer is high;
Three, the valve body temperature that causes of indirect heat transmission is high;
Four, the micro-valve body temperature that causes of leaking of working medium (steam) is high;
Five, other valve leaks occurs that the valve body temperature that heat conduct retrograde causes is high.
According to practical experience for many years and data statistics, valve body temperature is high but valve does not have the ratio of interior leakage to account for 20%-30% (many factors such as management when installing with each power plant design and maintenance management is in the future relevant) of the high high-end valve of whole valve body temperature; Wherein more than 98% does not have the high-end valve temperature height of interior leakage to be caused by two in above-mentioned reason, three, four and five.
Elaborate and cause the reason and correlated judgment condition that high-end valve temperature is high:
One, valve leaks in existing
Be in the high-end valve of closed condition in electric system, before valve one what connect is female pipe, and being the overheated steam of High Temperature High Pressure in female pipe, is then vacuum state (steam turbine) or the gas (boiler) close to normal temperature and pressure after valve.Superheated vapor in female pipe similarly is a heat reservoir, is connected with female pipe the pipeline that is not communicated with (directed flow that there is not water vapor) and valve then along with female pipe distance more and more far and temperature reduces gradually.Because interior leakage refers to the valve being in closed condition, still have overheated steam continuously from female pipe by phenomenon ducted after valve directed flow to valve.Therefore, along with the increase of interior leakage leakage quantity, the temperature of valve body and coupled pipeline also can increase.
Two, directly the valve body temperature that causes of heat transfer is high
The space length that direct heat transfer refers to due to valve and female pipe is too near, and the valve body temperature that the superheated vapor in female pipe is caused by direct heat transfer raises.According to thermodynamics knowledge, under thermal equilibrium state from high temperature heat source more close to local temperature higher.If therefore the female pipe of valve body distance is nearer, the temperature after thermal equilibrium is higher.In electric power system design standard, valve should apart from female pipe more than 1.5 meters, but in fact the distance of the part valve of part power plant and female pipe does not reach this standard.If valve body temperature height be direct heat transfer institute extremely, as long as the equipment one be then connected with this valve puts into operation, valve body will keep high temperature, can not reduce also can not time height time low.
Rule of judgment, when only having female Guan Shi in predeterminable range scope before valve, when described high-end valve to be measured meets described first measuring tempeature condition, then diagnoses out described high-end valve to be measured to be that the valve body temperature that direct heat transfer causes is high.
Three, the valve body temperature that causes of indirect heat transmission is high
Indirect heat transmission to refer to before valve nearby (in predeterminable range) and there is threeway, and when valve closing, other two of threeway makes valve body temperature raise owing to there is the flowing of superheated vapor by heat conducting mode.Except easily to produce from threeway hypotelorism due to valve temperature too high except, another feature of indirect heat transmission is when threeway place has vapor flow, and valve body temperature raises, if when not having vapor flow, valve body temperature does not raise.Be embodied in valve body temperature to change along with the change of the method for operation, this feature is also indirect heat transmission and direct heat conducting difference.
Rule of judgment, when only having described threeway in described predeterminable range scope before described valve, when high-end valve to be measured meets the first measuring tempeature condition, then diagnoses out described high-end valve to be measured to be that the valve body temperature that indirect heat transmission causes is high.
Four, the micro-valve body temperature that causes of leaking of working medium (steam) is high
Working medium is micro-leaks that refer to originally should high pressure high temperature vapor in the duct for generating electricity, (interface of the Flange joint in heat-insulation layer is also had, the valve rod place etc. of adjustment doors) in heat-insulation layer by the atomic slot leakage of certain on pipeline or pipe welding port.The superheated vapor leaked moves and heating and thermal insulation layer and pipeline in heat-insulation layer, and valve body temperature is raised.There is micro-feature leaked to have: heat-insulation layer interior humidity is higher than heat-insulation layer outer moisture; The external skin temperatures of heat-insulation layer is apparently higher than design load; Indeterminable phenomenon is had with during outside transition position infrared temperature-measuring gun thermometric at heat-insulation layer, etc.
Working medium leaks (containing the interface of the Flange joint not in heat-insulation layer, the valve rod place etc. of adjustment doors) to also have the micro-filler taking the form of high pressure valve self that leaks of a kind of working medium and the cooperation place of valve rod and stuffing-box to occur.As long as valve body temperature just can raise a lot by the micro-atomic little amount that leaks of this working medium, and naked eyes are not easy to find.Although micro-the leaking of this working medium can not cause heat-insulation layer interior humidity higher than heat-insulation layer outer moisture, the cooperation place humidity of stuffing-box is obviously higher, also has during infrared temperature-measuring gun thermometric have indeterminable phenomenon etc. in certain position.
Rule of judgment, when high-end valve to be measured meet described first measure damp condition time, when described high-end valve to be measured meets the first measuring tempeature condition, then diagnose out described high-end valve to be measured to be that the micro-valve body temperature that causes of leaking of working medium is high.
Five, other valve leaks occurs that the valve body temperature that heat conduct retrograde causes is high
After heat conduct retrograde refers to valve, temperature is higher than temperature before valve, and the original intention of design has been run counter in the direction of this heat flow.When there is the reverse heat transfer of heat, the valve in the other somewhere of the system that is likely there occurs interior leakage, causes the temperature after valve higher than the temperature before valve, before now heat is transmitted to valve after valve, valve body temperature is herein raised.
Rule of judgment, when high-end valve to be measured does not meet the first measurement damp condition, when described high-end valve to be measured meets described second measuring tempeature condition, then diagnoses out described high-end valve to be measured to be that the valve body temperature that other valves leakage causes is high.
In summary it can be seen, in several reasons more than causing valve body temperature high two, three, four and five substantially by all cause the high reason of non-interior leakage valve temperature be all encompassed in (except the situation that the valve body temperature caused because not meeting therrmodynamic system layout that power rule of law specify that accounting is minimum is high), therefore, realize diagnosing valves leakage by means of only a Rule of judgment relative to prior art, substantially increase the accuracy rate to valves leakage diagnosis, and then reduce the impact of valves leakage on the economy of power plant, security and environment.
It should be noted is that, the valve body temperature that the valve body temperature that direct heat transfer causes is high, indirect heat transmission causes is high, and high-end valve to be measured does not meet the first measurement damp condition and the second measuring tempeature condition occurs that the valve body temperature that valves leakage causes is high simultaneously, these three kinds of situations can adopt quantitative calculation method to carry out proving or quantitatively calculating.
Corresponding with said method embodiment, the invention also discloses a kind of internal leakage of valve of thermodynamic system in power plant diagnostic system.
See Fig. 2, a kind of structural representation of internal leakage of valve of thermodynamic system in power plant diagnostic system disclosed in the embodiment of the present invention, comprising:
First judging unit 21, for after being in the to be measured high-end valve thermal equilibrium of closed condition, in predeterminable range, before judging the valve of described high-end valve to be measured, whether there are female pipe or threeway, if, then perform the second judging unit 22, otherwise perform the 3rd judging unit 25;
Wherein, predeterminable range is determined, preferably 1.5 meters according to actual conditions.
Second judging unit 22, if for having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets the first measuring tempeature condition, if, then perform the first interior leakage diagnosis unit 23, otherwise, perform in first and leak diagnosis unit 24;
First measuring tempeature condition is that after the valve of high-end valve to be measured, temperature is lower than 50 DEG C (i.e. temperature < 50 DEG C after valve), or after described valve, temperature is not less than 50 DEG C and lower than the half (namely after 50 DEG C≤valve before temperature < 1/2 valve temperature) of temperature before the valve of described high-end valve to be measured.
Wherein, before valve, temperature refers to and flows to by medium, the temperature that admission line and valve body weld bond measure near admission line side.
After valve, temperature refers to and flows to by medium, the temperature that outlet pipe and valve body weld bond measure near outlet pipe side.
First interior leakage diagnosis unit 23, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit 24 in first, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
3rd judging unit 25, if for not having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets first and measure damp condition, if, then perform the 4th judging unit 26, otherwise, perform the 5th judging unit 29;
First measurement damp condition is that the heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
4th judging unit 26, if meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets described first measuring tempeature condition, if, then perform the second interior leakage diagnosis unit 27, otherwise, perform in second and leak diagnosis unit 28;
Second interior leakage diagnosis unit 27, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit 28 in second, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
5th judging unit 29, if do not meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets the second measuring tempeature condition, if, then perform the 3rd interior leakage diagnosis unit 30, otherwise, perform in the 3rd and leak diagnosis unit 31;
Second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve (namely after valve before temperature > valve temperature).
3rd interior leakage diagnosis unit 30, if meet described second measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit 31 in 3rd, if do not meet described second measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured.
It should be noted is that, the first measuring tempeature condition in the present embodiment, first measures damp condition and the second measuring tempeature condition is all obtained by theory with practice, therefore, the deagnostic structure obtained according to above-mentioned three conditions has very high accuracy.
As can be seen from above-mentioned technical scheme, whether the present invention has female pipe or threeway by judging that the valve of high-end valve to be measured is front in predeterminable range, and whether high-end valve to be measured meets the first measuring tempeature condition, the first measurement damp condition and the second measuring tempeature condition, realize the detection one by one to valve body temperature height producing cause, thus to analyze and get rid of be not the situation that the valve body temperature that causes due to interior leakage conductance is high, realize the diagnosis to valves leakage.Therefore, realize, for valves leakage diagnosis, substantially increasing the accuracy rate to valves leakage diagnosis by means of only Rule of judgment relative to prior art, and then reduce the impact of valves leakage on the economy of power plant, security and environment.
Find through a large amount of theoretical analysises and engineering survey, cause the high reason of valve body temperature to have a lot, mainly comprise following reason:
One, valve leaks in existing;
Two, directly the valve body temperature that causes of heat transfer is high;
Three, the valve body temperature that causes of indirect heat transmission is high;
Four, the micro-valve body temperature that causes of leaking of working medium (steam) is high;
Five, other valve leaks occurs that the valve body temperature that heat conduct retrograde causes is high.
According to practical experience for many years and data statistics, valve body temperature is high but valve does not have the ratio of interior leakage to account for 20%-30% (many factors such as management when installing with each power plant design and maintenance management is in the future relevant) of the high high-end valve of whole valve body temperature; Wherein more than 98% does not have the high-end valve temperature height of interior leakage to be caused by two in above-mentioned reason, three, four and five.
Wherein, cause reason and correlated judgment condition that high-end valve temperature is high see embodiment of the method, repeat no more herein.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (12)
1. an internal leakage of valve of thermodynamic system in power plant diagnostic method, is characterized in that, comprising:
After being in the to be measured high-end valve thermal equilibrium of closed condition, in predeterminable range, before judging the valve of described high-end valve to be measured, whether there are female pipe or threeway;
If have described mother's pipe or described threeway in described predeterminable range scope before described valve, judge whether described high-end valve to be measured meets the first measuring tempeature condition;
If described high-end valve to be measured meets described first measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described first measuring tempeature condition, then diagnose out described high-end valves leakage to be measured;
If there is no described mother's pipe or described threeway in described predeterminable range scope before described valve, judge whether described high-end valve to be measured meets first and measure damp condition;
If described high-end valve to be measured meets described first measure damp condition, judge whether described high-end valve to be measured meets described first measuring tempeature condition;
If described high-end valve to be measured meets described first measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described first measuring tempeature condition, then diagnose out described high-end valves leakage to be measured;
If described high-end valve to be measured does not meet described first measure damp condition, judge whether described high-end valve to be measured meets the second measuring tempeature condition;
If described high-end valve to be measured meets described second measuring tempeature condition, then diagnose out the interior leakage of described high-end valve to be measured;
If described high-end valve to be measured does not meet described second measuring tempeature condition, then diagnose out described high-end valves leakage to be measured.
2. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, it is characterized in that, described first measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature is lower than 50 DEG C, or after described valve, temperature is not less than 50 DEG C and lower than the half of temperature before the valve of described high-end valve to be measured.
3. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, is characterized in that, described first measurement damp condition is that the heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
4. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, is characterized in that, described second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve.
5. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, it is characterized in that, if only have described mother's pipe in described predeterminable range scope before described valve, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that direct heat transfer causes is high.
6. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, it is characterized in that, if only have described threeway in described predeterminable range scope before described valve, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that indirect heat transmission causes is high.
7. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, it is characterized in that, if described high-end valve to be measured meets described first measure damp condition, when described high-end valve to be measured meets described first measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the micro-valve body temperature that causes of leaking of working medium is high.
8. internal leakage of valve of thermodynamic system in power plant diagnostic method according to claim 1, it is characterized in that, if described high-end valve to be measured does not meet described first measure damp condition, when described high-end valve to be measured meets described second measuring tempeature condition, then described high-end valve to be measured is diagnosed out to be that the valve body temperature that other valves leakage causes is high.
9. an internal leakage of valve of thermodynamic system in power plant diagnostic system, is characterized in that, comprising:
Whether the first judging unit, for after being in the to be measured high-end valve thermal equilibrium of closed condition, have female pipe or threeway in predeterminable range before judging the valve of described high-end valve to be measured;
Second judging unit, if for having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets the first measuring tempeature condition;
First interior leakage diagnosis unit, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in first, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
3rd judging unit, if for not having described mother's pipe or described threeway in described predeterminable range scope before described valve, judges whether described high-end valve to be measured meets first and measure damp condition;
4th judging unit, if meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets described first measuring tempeature condition;
Second interior leakage diagnosis unit, if meet described first measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in second, if do not meet described first measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured;
5th judging unit, if do not meet described first for described high-end valve to be measured to measure damp condition, judges whether described high-end valve to be measured meets the second measuring tempeature condition;
3rd interior leakage diagnosis unit, if meet described second measuring tempeature condition for described high-end valve to be measured, then diagnoses out the interior leakage of described high-end valve to be measured;
Leak diagnosis unit in 3rd, if do not meet described second measuring tempeature condition for described high-end valve to be measured, then diagnose out described high-end valves leakage to be measured.
10. internal leakage of valve of thermodynamic system in power plant diagnostic system according to claim 9, it is characterized in that, described first measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature is lower than 50 DEG C, or after described valve, temperature is not less than 50 DEG C and lower than the half of temperature before the valve of described high-end valve to be measured.
11. internal leakage of valve of thermodynamic system in power plant diagnostic systems according to claim 9, is characterized in that, described first measurement damp condition is that the heat-insulation layer humidity before the valve of described high-end valve to be measured exceedes the outer humidity of heat-insulation layer.
12. internal leakage of valve of thermodynamic system in power plant diagnostic systems according to claim 9, is characterized in that, described second measuring tempeature condition is that after the valve of described high-end valve to be measured, temperature exceedes temperature before valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184205.XA CN105092157B (en) | 2014-05-04 | 2014-05-04 | A kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410184205.XA CN105092157B (en) | 2014-05-04 | 2014-05-04 | A kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105092157A true CN105092157A (en) | 2015-11-25 |
| CN105092157B CN105092157B (en) | 2017-08-08 |
Family
ID=54573089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410184205.XA Active CN105092157B (en) | 2014-05-04 | 2014-05-04 | A kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105092157B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709911A (en) * | 2018-12-11 | 2019-05-03 | 上海电力学院 | A kind of fired power generating unit cycle fluid leakage On-line Measuring Method and measuring system |
| CN110083876A (en) * | 2019-04-01 | 2019-08-02 | 南京兆能节能科技有限公司 | A kind of power plant high-temperature high pressure valve is interior to leak automatic analysis system and analysis method |
| CN112096958A (en) * | 2020-09-29 | 2020-12-18 | 核电运行研究(上海)有限公司 | Comprehensive online detection method for valves of nuclear power station |
| CN114414175A (en) * | 2022-01-17 | 2022-04-29 | 山东电力工程咨询院有限公司 | Thermodynamic system drain valve inner leakage detection method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2273573A (en) * | 1992-12-19 | 1994-06-22 | Bosch Gmbh Robert | Method of recognising injection valve leakage |
| US20030084711A1 (en) * | 2001-11-07 | 2003-05-08 | Masao Kano | Method of detecting pressure leakage in evaporated fuel control system for use in automobile |
| CN102478445A (en) * | 2010-11-23 | 2012-05-30 | 华东电力试验研究院有限公司 | Method for detecting internal leakage of valve of thermodynamic system in power plant |
| CN102998062A (en) * | 2011-09-08 | 2013-03-27 | 湖南鸿远高压阀门有限公司 | Intelligent high-end valve and method and device for testing same |
| CN103557992A (en) * | 2013-11-19 | 2014-02-05 | 长沙理工大学 | Method for detecting inner leakage of steam hydrophobic valve based on valve front pipe wall temperature detection |
-
2014
- 2014-05-04 CN CN201410184205.XA patent/CN105092157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2273573A (en) * | 1992-12-19 | 1994-06-22 | Bosch Gmbh Robert | Method of recognising injection valve leakage |
| US20030084711A1 (en) * | 2001-11-07 | 2003-05-08 | Masao Kano | Method of detecting pressure leakage in evaporated fuel control system for use in automobile |
| CN102478445A (en) * | 2010-11-23 | 2012-05-30 | 华东电力试验研究院有限公司 | Method for detecting internal leakage of valve of thermodynamic system in power plant |
| CN102998062A (en) * | 2011-09-08 | 2013-03-27 | 湖南鸿远高压阀门有限公司 | Intelligent high-end valve and method and device for testing same |
| CN103557992A (en) * | 2013-11-19 | 2014-02-05 | 长沙理工大学 | Method for detecting inner leakage of steam hydrophobic valve based on valve front pipe wall temperature detection |
Non-Patent Citations (1)
| Title |
|---|
| 刘洋等: "基于传热理论的疏水阀门内漏量计算方法", 《热能动力工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709911A (en) * | 2018-12-11 | 2019-05-03 | 上海电力学院 | A kind of fired power generating unit cycle fluid leakage On-line Measuring Method and measuring system |
| CN109709911B (en) * | 2018-12-11 | 2021-06-22 | 上海电力学院 | On-line measuring method and system for leakage of circulating working medium of thermal power generating unit |
| CN110083876A (en) * | 2019-04-01 | 2019-08-02 | 南京兆能节能科技有限公司 | A kind of power plant high-temperature high pressure valve is interior to leak automatic analysis system and analysis method |
| CN112096958A (en) * | 2020-09-29 | 2020-12-18 | 核电运行研究(上海)有限公司 | Comprehensive online detection method for valves of nuclear power station |
| CN114414175A (en) * | 2022-01-17 | 2022-04-29 | 山东电力工程咨询院有限公司 | Thermodynamic system drain valve inner leakage detection method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105092157B (en) | 2017-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103016948B (en) | The online leakage detection apparatus of Thermal Power Station's steam-water pipe drain valve | |
| CN105092157A (en) | Power plant thermodynamic system valve inner leakage diagnosis method and system | |
| KR101135168B1 (en) | Method and system for inspecting creep and thinned damage in heat exchanger steam tube | |
| CN103557992B (en) | Based on the Automatic steam trap Trap inner leakage detection method that pipe surface temperature before valve detects | |
| CN102734783B (en) | Method for calibrating monitoring data parameters of heat-absorbing surfaces at each level of supercritical boiler of power station | |
| CN204372558U (en) | A kind of bilayer sleeve heat supply pipeline leak detecting device | |
| CN104464851A (en) | Device and method for monitoring thermal fatigue prototype of loop high-temperature pipeline in nuclear power plant | |
| CN106053105A (en) | Nuclear power station regenerative heater energy efficiency monitoring and diagnosing method and system | |
| CN113158494B (en) | Heat exchanger virtual-real fusion fault diagnosis method and system | |
| CN106680001A (en) | Pipeline three-way area on-line fatigue life monitoring device and method | |
| CN110375924A (en) | A kind of power plant valve leakage Quantitative Evaluation System | |
| JP2006010229A (en) | Boiler deterioration diagnosing method, device, system and recording medium for recording program | |
| CN105890766A (en) | Blackbody radiation source suitable for vacuum low-temperature environment | |
| CN103792248B (en) | A kind of heated Tube flowing wet steam humidity measuring instrument | |
| CN106168371A (en) | The detection device and method that the blocking of a kind of boiler water wall pipeline is the most smooth with current | |
| CN204176341U (en) | A kind of leak detecting device of defeated hot three layers of sleeve pipe | |
| CN108105749A (en) | Working medium flow On-line Measuring Method and system in a kind of water screen tube | |
| JP2021011992A5 (en) | ||
| CN105572168A (en) | Thermal type steam dryness meter | |
| CN103604594B (en) | Measure the device of thermosistor performance parameter | |
| CN203551273U (en) | Device for measuring performance parameters of thermoregulator | |
| CN103674342B (en) | A kind of water cassette heat flow transducer | |
| CN209296166U (en) | A kind of small-bore pipeline temperature measuring equipment | |
| CN202297641U (en) | Portable blast furnace cooling water temperature detection device | |
| CN206540448U (en) | Utilize heat transferring medium indirect heat exchange coal oven dithio-gas heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |