CN102998062B - A kind of valve method of testing, device and a kind of intelligent valve - Google Patents
A kind of valve method of testing, device and a kind of intelligent valve Download PDFInfo
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- CN102998062B CN102998062B CN201110265571.4A CN201110265571A CN102998062B CN 102998062 B CN102998062 B CN 102998062B CN 201110265571 A CN201110265571 A CN 201110265571A CN 102998062 B CN102998062 B CN 102998062B
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Abstract
The invention discloses a kind of valve method of testing, device and a kind of intelligent valve, by temperature sensor, corresponding valve can be detected, once there is internal hemorrhage due to trauma in valve, and the present invention just can get too high temperature signal and judge that internal hemorrhage due to trauma occurs in corresponding switch valve.Therefore, valve can be detected by the present invention in advance, when internal hemorrhage due to trauma occurs in valve, it is also possible to quickly detects internal hemorrhage due to trauma occur, it is possible to reduces the loss that internal hemorrhage due to trauma is brought.
Description
Technical field
The present invention relates to high-end valve technology field, particularly relate to a kind of high-end valve method of testing, device and a kind of intelligent high-end valve.
Background technology
Along with increasing rapidly of China productivity, the energy required for economic development is more and more in short supply.Although the electric power that the green energy resource such as solar electrical energy generation, wind power generation is provided gets more and more, but thermal power generation is still the main source of China's electric energy.In field of thermal power, 600MW, 1000MW of energy-conserving and environment-protective are subcritical, supercritical thermal power unit has become main force's unit, in these units, will use substantial amounts of high-end valve.
The operation of generating set is played an important role by these high-end valves, and in order to ensure to run safety, high-end valve often has two switch valves.But due to the reason such as technological level, day-to-day loss, the problem that high-end valve in use internal hemorrhage due to trauma can still occur.The internal hemorrhage due to trauma of high-end valve will bring huge adverse effect to the safe and highly efficient operation of generating set, the most how to reduce the loss brought due to high-end valves leakage, is pendulum significant problem in face of each thermal power plant.
But, the existing solution for valves leakage carries out remedial measures after only there is internal hemorrhage due to trauma, this method cannot find the internal hemorrhage due to trauma of high-end valve in time, the most also cannot effectively reduce the loss that high-end valves leakage is brought.Certainly, the high-end valve in other heat power equipments (such as steam engine) there is also same problem.
Summary of the invention
For solving above-mentioned technical problem, the embodiment of the present invention provides a kind of high-end valve method of testing, device and a kind of intelligent valve, and to reduce the loss that valves leakage is brought, technical scheme is as follows:
A kind of valve method of testing, valve is the valve of heat power equipment, including:
Open the first switch valve and close second switch valve, using temperature sensor to obtain the temperature signal outside valve；
This temperature signal is compared with predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described second switch valve.
Preferably, also include:
Open second switch valve and close the first switch valve, using described temperature sensor to obtain the temperature signal outside valve；
This temperature signal is compared with described predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described first switch valve.
Preferably, also include: while using described temperature sensor to obtain the temperature signal outside valve, ultrasonic sensor is used to obtain the speed air flow outside valve and compare with default Second Threshold, if greater than described Second Threshold, it is determined that internal hemorrhage due to trauma occurs in corresponding switch valve.
Preferably, also include:
Signal outside acquired valve, switch valve state, temporal information and judged result are preserved.
Preferably, also include: when determining that internal hemorrhage due to trauma occurs in valve, report to the police.
Present invention also offers a kind of valve testing device, valve is the valve of heat power equipment, including: valve actuator, processor and temperature sensor,
Described valve actuator, is used for driving valve opening and closedown；
Described temperature sensor, for when described valve actuator is opened the first switch valve and closes second switch valve, obtains the temperature signal outside valve；
Described processor, for comparing this temperature signal with predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described second switch valve.
Preferably, described temperature sensor is specifically configured to: when described valve actuator is opened second switch valve and closes the first switch valve, obtain the temperature signal outside valve to be compared with described predetermined threshold value by this temperature signal for described processor, when more than described predetermined threshold value, determine that internal hemorrhage due to trauma occurs in described first switch valve.
Preferably, also include: ultrasonic sensor, for while using described temperature sensor to obtain the temperature signal outside valve, obtain the speed air flow outside valve so that described speed air flow is compared by described processor with the Second Threshold preset, when more than described Second Threshold, determine that internal hemorrhage due to trauma occurs in corresponding switch valve.
Preferably, also include: storage device, for the signal outside acquired valve, switch valve state, temporal information and judged result are preserved.
Preferably, also include: alarm device, for when determining that internal hemorrhage due to trauma occurs in valve, report to the police.
Present invention also offers a kind of intelligent valve, above-mentioned valve testing device.
The technical scheme provided from the above embodiment of the present invention, valve can be detected by the present invention automatically, and once internal hemorrhage due to trauma occurs in valve, and the present invention just can use temperature sensor get too high temperature signal and judge that internal hemorrhage due to trauma occurs in corresponding switch valve.Therefore, valve can be detected by the present invention in advance, when internal hemorrhage due to trauma occurs in valve, it is also possible to quickly detects internal hemorrhage due to trauma occur, it is possible to reduces the loss that internal hemorrhage due to trauma is brought.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments described in the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of a kind of high-end valve method of testing that Fig. 1 provides for the embodiment of the present invention；
The schematic flow sheet of the another kind high-end valve method of testing that Fig. 2 provides for the embodiment of the present invention；
The schematic flow sheet of the another kind high-end valve method of testing that Fig. 3 provides for the embodiment of the present invention；
The structural representation of a kind of high-end valve testing device that Fig. 4 provides for the embodiment of the present invention；
The structural representation of the high-end valve testing device of another kind that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of protection of the invention.
As it is shown in figure 1, the one high-end valve method of testing that the embodiment of the present invention provides, including:
S101, open the first switch valve and close second switch valve.
In order to ensure to run safety, high-end valve often has two switch valves, when carrying out shutoff operation, is all closed by two switch valves, when carrying out opening operation, is switched on by two switch valves.
S102, use temperature sensor obtain the temperature signal outside high-end valve.
It will be understood by those skilled in the art that, a kind of high pressure, the state of high heat is presented owing to heat power equipment (such as: thermal power generation unit) is internal, there is internal hemorrhage due to trauma event in the most high-end valve, thermal current within heat power equipment will flow to outside high-end valve, makes the air pressure outside high-end valve and temperature drastically raise.
S103, this temperature signal is compared with predetermined threshold value, it may be judged whether more than described predetermined threshold value, if it is, perform step S104, otherwise perform step S105.
Wherein, predetermined threshold value can be set according to actual condition and revise, and the present invention does not limits at this.
S104, determine that internal hemorrhage due to trauma occurs in described second switch valve.
S105, determine that internal hemorrhage due to trauma does not occurs in described second switch valve.
Certainly, when determining that internal hemorrhage due to trauma occurs in switch valve, it is also possible to report to the police.
In the case of the first switch valve is opened and second switch valve cuts out, second switch valve can be made whether the detection of internal hemorrhage due to trauma.In like manner, in the case of second switch valve is opened and the first switch valve cuts out, can whether internal hemorrhage due to trauma detects to the first switch valve.Therefore, after detecting one of them switch valve whether internal hemorrhage due to trauma, it is also possible to use identical principle to detect another switch valve.Concrete detection process can be periodic, it is also possible to being irregular, the present invention does not limits at this.
Therefore, as in figure 2 it is shown, the alternative valve method of testing that the embodiment of the present invention provides, also include:
S106, open second switch valve and close the first switch valve.
S107, described temperature sensor is used to obtain the temperature signal outside high-end valve.
S108, this temperature signal is compared with described predetermined threshold value, if greater than described predetermined threshold value, then perform step S109, otherwise perform step S110.
S109, determine that internal hemorrhage due to trauma occurs in described first switch valve.
S110, determine that internal hemorrhage due to trauma does not occurs in described first switch valve.
The one high-end valve method of testing that the embodiment of the present invention provides, can detect high-end valve automatically, and once internal hemorrhage due to trauma occurs in switch valve, and the present invention just can use temperature sensor get too high temperature signal and judge that internal hemorrhage due to trauma occurs in corresponding switch valve.Therefore, valve can be detected by the present invention in advance, when internal hemorrhage due to trauma occurs in valve, it is also possible to quickly detects internal hemorrhage due to trauma occur, it is possible to reduces the loss that internal hemorrhage due to trauma is brought.
In the another kind high-end valve method of testing that the embodiment of the present invention provides, all right: while using described temperature sensor to obtain the temperature signal outside high-end valve, ultrasonic sensor is used to obtain the speed air flow outside high-end valve and compare with default Second Threshold, if greater than described Second Threshold, it is determined that internal hemorrhage due to trauma occurs in corresponding switch valve.
As it is shown on figure 3, concrete steps can be:
S201, open the first switch valve and close second switch valve.
S202, use temperature sensor obtain the temperature signal outside high-end valve and use ultrasonic sensor to obtain the speed air flow outside high-end valve.
S203, judge this temperature signal whether more than predetermined threshold value or described speed air flow more than the Second Threshold preset, if it is, perform step S204, otherwise perform step S205.
Obtain the method less stable that single parameter carries out judging: when temperature sensor damages when, it is impossible to correctly obtain temperature signal.Owing to when internal hemorrhage due to trauma, high thermal current occurring outside high-end valve, therefore can also use ultrasonic sensor that air velocity is detected.In order to ensure the susceptiveness of detection, the judgment mode of "or" can being taked, it may be assumed that in two kinds of judged results, as long as occurring that at least one judged result is more than threshold value set in advance by: the signal gathered, then may determine that internal hemorrhage due to trauma occurs.
Acquire temperature and two parameters of speed air flow due to the present embodiment simultaneously, and wherein any one parameter is beyond threshold value set in advance, it is possible to determine that internal hemorrhage due to trauma occurs, therefore can be effectively improved accuracy and the sensitivity of judgement.
S204, determine that internal hemorrhage due to trauma occurs in described second switch valve.
S205, determine that internal hemorrhage due to trauma does not occurs in described second switch valve.
Certainly, in other embodiments of the present invention, it is also possible to the signal outside acquired high-end valve, switch valve state, temporal information and judged result are preserved.In actual applications, it is possible to use the information preserved is sent in other equipment by the mode of form, such as display screen.
The one high-end valve method of testing that the embodiment of the present invention provides, can detect high-end valve automatically, and once internal hemorrhage due to trauma occurs in switch valve, and the present invention just can use temperature sensor get too high temperature signal and judge that internal hemorrhage due to trauma occurs in corresponding switch valve.Therefore, valve can be detected by the present invention in advance, when internal hemorrhage due to trauma occurs in valve, it is also possible to quickly detects internal hemorrhage due to trauma occur, it is possible to reduces the loss that internal hemorrhage due to trauma is brought.
Relative to embodiment of the method above, present invention also offers a kind of high-end valve testing device.
As shown in Figure 4, the high-end valve testing device of one that the embodiment of the present invention provides, including: valve actuator 100, processor 200 and temperature sensor 300,
Valve actuator 100, is used for driving valve opening and closedown；
In order to ensure to run safety, high-end valve often has two switch valves, when carrying out shutoff operation, is all closed by two switch valves, when carrying out opening operation, is switched on by two switch valves.
Temperature sensor 300, for when valve actuator 100 is opened the first switch valve 400 and closes second switch valve 500, obtains the temperature signal outside high-end valve；
It will be understood by those skilled in the art that, owing to presenting a kind of high pressure, the state of high heat inside heat power equipment, there is internal hemorrhage due to trauma event in the most high-end valve, and the thermal current within heat power equipment will flow to outside high-end valve, makes the air pressure outside high-end valve and temperature drastically raise.
Processor 200, for comparing this temperature signal with predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described second switch valve 500.
Wherein, predetermined threshold value can be set according to actual condition and revise, and the present invention does not limits at this.
Certainly, when determining that internal hemorrhage due to trauma occurs in switch valve, it is also possible to use alarm device to report to the police, and using this alarm device as the part of the present invention.
In the case of the first switch valve 400 is opened and second switch valve 500 cuts out, second switch valve 500 can be made whether the detection of internal hemorrhage due to trauma.In like manner, in the case of second switch valve 500 is opened and the first switch valve 400 cuts out, can whether internal hemorrhage due to trauma detects to the first switch valve 400.Therefore, after detecting one of them switch valve whether internal hemorrhage due to trauma, it is also possible to use identical principle to detect another switch valve.That is, temperature sensor 300 can also be specifically configured to: when valve actuator 100 is opened second switch valve 500 and closes the first switch valve 400, obtain the temperature signal outside high-end valve to be compared with described predetermined threshold value by this temperature signal for processor 200, when more than described predetermined threshold value, determine that internal hemorrhage due to trauma occurs in described first switch valve 400.
As shown in Figure 5, the high-end valve testing device of another kind that the embodiment of the present invention provides, can also include: ultrasonic sensor 600, for while using temperature sensor 300 to obtain the temperature signal outside high-end valve, obtain the speed air flow outside high-end valve so that described speed air flow is compared by processor 200 with the Second Threshold preset, when more than described Second Threshold, determine that internal hemorrhage due to trauma occurs in corresponding switch valve.
Obtain the method less stable that single parameter carries out judging: when temperature sensor damages when, it is impossible to correctly obtain temperature signal.Owing to when internal hemorrhage due to trauma, high thermal current occurring outside high-end valve, therefore can also use ultrasonic sensor that air velocity is detected.In order to ensure the susceptiveness of detection, the judgment mode of "or" can being taked, it may be assumed that in two kinds of judged results, as long as occurring that at least one judged result is more than threshold value set in advance by: the signal gathered, then may determine that internal hemorrhage due to trauma occurs.
Acquire temperature and two parameters of speed air flow due to the present embodiment simultaneously, and wherein any one parameter is beyond threshold value set in advance, it is possible to determine that internal hemorrhage due to trauma occurs, therefore can be effectively improved accuracy and the sensitivity of judgement.
As it is shown in figure 5, the high-end valve testing device of another kind that the embodiment of the present invention provides, it is also possible to including: storage device 700, for the signal outside acquired high-end valve, switch valve state, temporal information and judged result are preserved.
In actual applications, it is possible to use the information preserved is sent in other equipment by the mode of form, such as display screen.
In actual applications, high-end for one provided by the present invention valve testing device can be fixedly mounted with high-end valve, constitute an entirety, this entirety is produced as a kind of intelligent high-end valve and uses.
Each embodiment in this specification all uses the mode gone forward one by one to describe, and between each embodiment, identical similar part sees mutually, and what each embodiment stressed is the difference with other embodiments.For device embodiment, owing to it is substantially similar to embodiment of the method, so describing fairly simple, relevant part sees the part of embodiment of the method and illustrates.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation or sequentially that there is any this reality between these entities or operation.
The above is only the detailed description of the invention of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. a valve method of testing, described valve is the valve of heat power equipment, and described valve has two switch valves, it is characterised in that including:
Open the first switch valve and close second switch valve, using temperature sensor to obtain the temperature signal outside valve；
This temperature signal is compared with predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described second switch valve；
Open second switch valve and close the first switch valve, using described temperature sensor to obtain the temperature signal outside valve；
This temperature signal is compared with described predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described first switch valve；
Wherein, described method also includes: while using described temperature sensor to obtain the temperature signal outside valve, ultrasonic sensor is used to obtain the speed air flow outside valve and compare with default Second Threshold, if greater than described Second Threshold, it is determined that internal hemorrhage due to trauma occurs in corresponding switch valve.
Method the most according to claim 1, it is characterised in that also include:
Signal outside acquired valve, switch valve state, temporal information and judged result are preserved.
Method the most according to claim 1, it is characterised in that also include: when determining that internal hemorrhage due to trauma occurs in valve, report to the police.
4. a valve testing device, described valve is the valve of heat power equipment, and described valve has two switch valves, it is characterised in that including: valve actuator, processor and temperature sensor,
Described valve actuator, is used for driving valve opening and closedown；
Described temperature sensor, for when described valve actuator is opened the first switch valve and closes second switch valve, obtains the temperature signal outside valve；
Described processor, for comparing this temperature signal with predetermined threshold value, if greater than described predetermined threshold value, it is determined that internal hemorrhage due to trauma occurs in described second switch valve；
Described temperature sensor is additionally operable to when described valve actuator is opened second switch valve and closes the first switch valve, obtain the temperature signal outside valve to be compared with described predetermined threshold value by this temperature signal for described processor, when more than described predetermined threshold value, determine that internal hemorrhage due to trauma occurs in described first switch valve；
Wherein, described device also includes: ultrasonic sensor, for while using described temperature sensor to obtain the temperature signal outside valve, obtain the speed air flow outside valve so that described speed air flow is compared by described processor with the Second Threshold preset, when more than described Second Threshold, determine that internal hemorrhage due to trauma occurs in corresponding switch valve.
Device the most according to claim 4, it is characterised in that also include: storage device, for preserving the signal outside acquired valve, switch valve state, temporal information and judged result.
Device the most according to claim 4, it is characterised in that also include: alarm device, for when determining that internal hemorrhage due to trauma occurs in valve, reports to the police.
7. an intelligent valve, it is characterised in that include the valve testing device described in claim 4.
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| CN201110265571.4A CN102998062B (en) | 2011-09-08 | 2011-09-08 | A kind of valve method of testing, device and a kind of intelligent valve |
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| CN201110265571.4A CN102998062B (en) | 2011-09-08 | 2011-09-08 | A kind of valve method of testing, device and a kind of intelligent valve |
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| CN102998062B true CN102998062B (en) | 2016-08-03 |
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| CN105092157B (en) * | 2014-05-04 | 2017-08-08 | 湖南鸿远高压阀门有限公司 | A kind of internal leakage of valve of thermodynamic system in power plant diagnostic method and diagnostic system |
| CN104913095B (en) * | 2015-04-10 | 2017-11-21 | 湖南鸿远高压阀门有限公司 | A kind of control method and device of the switch based on composite valve |
| US10739017B2 (en) * | 2018-08-20 | 2020-08-11 | Computime Ltd. | Determination of hydronic valve opening point |
| CN109682539A (en) * | 2018-11-23 | 2019-04-26 | 国网天津市电力公司电力科学研究院 | The integrated valve leakage current tester of more measuring techniques |
| CN110585807A (en) * | 2019-09-23 | 2019-12-20 | 北京华科仪科技股份有限公司 | Self-cleaning high-temperature filtering system cleaning method and high-temperature filtering system thereof |
| CN112098001A (en) * | 2020-09-25 | 2020-12-18 | 三门核电有限公司 | Valve internal leakage detection method and device |
| CN112836437A (en) * | 2021-03-05 | 2021-05-25 | 国家能源集团谏壁发电厂 | Thermal power generating unit valve internal leakage detection method |
| CN118009095A (en) * | 2024-04-10 | 2024-05-10 | 国能龙源环保有限公司 | Valve leakage on-line monitoring method, device, equipment and medium for desulfurization system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406979A (en) * | 1986-06-16 | 1995-04-18 | Acf Manufacturing, Inc. | Valve and sensor arrangement |
| US5616829A (en) * | 1995-03-09 | 1997-04-01 | Teledyne Industries Inc. | Abnormality detection/suppression system for a valve apparatus |
| CN101726408A (en) * | 2008-10-24 | 2010-06-09 | 通用电气公司 | Pressure relief valve monitoring system and method |
| CN101809348A (en) * | 2007-09-24 | 2010-08-18 | 西门子公司 | Be used for valve, be particularly useful for the diagnostic system and the diagnostic method of stop valve or control valve |
| CN202204644U (en) * | 2011-09-08 | 2012-04-25 | 湖南鸿远高压阀门有限公司 | High-end valve testing device and intelligent high-end valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9713194D0 (en) * | 1997-06-24 | 1997-08-27 | Planer Prod Ltd | Flow detector system |
| CN102095083A (en) * | 2010-12-16 | 2011-06-15 | 上海工业自动化仪表研究院 | Detecting system used for leakage of gas valve |
| CN102141459A (en) * | 2010-12-30 | 2011-08-03 | 北京光华纺织集团有限公司 | Fuel gas leakage detection method |
-
2011
- 2011-09-08 CN CN201110265571.4A patent/CN102998062B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406979A (en) * | 1986-06-16 | 1995-04-18 | Acf Manufacturing, Inc. | Valve and sensor arrangement |
| US5616829A (en) * | 1995-03-09 | 1997-04-01 | Teledyne Industries Inc. | Abnormality detection/suppression system for a valve apparatus |
| CN101809348A (en) * | 2007-09-24 | 2010-08-18 | 西门子公司 | Be used for valve, be particularly useful for the diagnostic system and the diagnostic method of stop valve or control valve |
| CN101726408A (en) * | 2008-10-24 | 2010-06-09 | 通用电气公司 | Pressure relief valve monitoring system and method |
| CN202204644U (en) * | 2011-09-08 | 2012-04-25 | 湖南鸿远高压阀门有限公司 | High-end valve testing device and intelligent high-end valve |
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