CN110274738B - Method and system for monitoring sealing performance of fully-sealed box based on moisture increment - Google Patents

Method and system for monitoring sealing performance of fully-sealed box based on moisture increment Download PDF

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Publication number
CN110274738B
CN110274738B CN201910544439.3A CN201910544439A CN110274738B CN 110274738 B CN110274738 B CN 110274738B CN 201910544439 A CN201910544439 A CN 201910544439A CN 110274738 B CN110274738 B CN 110274738B
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China
Prior art keywords
fully
sealed box
moisture
box body
increment
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CN110274738A (en
Inventor
张健能
劳锦富
潘平东
麦志彦
刘律辉
楚少华
梁少梅
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • 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
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Abstract

The invention discloses a method and a system for monitoring the sealing performance of a fully-sealed box based on moisture increment, wherein the method comprises the following steps: measuring t in fully-sealed box0Time vapor pressure P0And the volume V of the fully-sealed box body, calculating t0Air moisture V.P in time full-sealed box0(ii) a Setting the secondary t of the condenser in the fully-sealed box0The total working time from the moment to the beginning is S, the water discharging efficiency in the working process of the condenser is rho, and the water discharging amount in the working process of the condenser is calculated as follows: s.rho; measuring t in fully-sealed box0Water vapor pressure P at + S time1Calculating t0+ S moment air moisture V.P in box1(ii) a Calculating the moisture increment delta V of the fully-sealed box body within the time length S, and comparing the moisture increment delta V with a preset threshold value VthComparing, if the water content increment delta V is larger than the preset threshold value VthA seal failure alarm is triggered. According to the invention, the tightness of the box body is judged and an alarm is given by comparing the box body moisture increment within the set time with the preset threshold value, so that the workload is reduced, the monitoring accuracy is improved, and the defect that the tightness of the box door is damaged by the box opening monitoring is overcome.

Description

Method and system for monitoring sealing performance of fully-sealed box based on moisture increment
Technical Field
The invention relates to the technical field of measurement, in particular to a method and a system for monitoring the sealing performance of a fully-sealed box based on moisture increment.
Background
Various boxes of electrical equipment, including switchgear case, terminal box, block terminal etc. for prevent that equipment from weing the corrosion damage in the box, insulating reduction short circuit, need take dampproofing measure to regularly inspect dampproofing measure, and whether the box is intake, the condensation appears. With the development of semiconductor refrigeration technology, semiconductor condensers are also increasingly used for moisture-proof and dry applications of boxes. Because the semiconductor refrigeration is dampproofing, can directly reduce the moisture in the box, therefore the box also gradually uses totally enclosed mode.
The moistureproof fully-sealed box body of the semiconductor condenser is used, so that the defects of poor sealing such as failure of a box door sealing strip, damage of box bottom cable inlet wire sealing, cracking of a welding seam and the like can be timely found and processed, rainwater and moisture can be prevented from entering the box body in a large amount, the tightness of the box body needs to be checked before and after raining and before and after humid weather, and the workload is large. The box body with high safety requirement is usually locked and protected, and how to check whether the box body is normally sealed after locking exists contradiction. The box door is opened to check the tightness of the box body, and the defects that the sealing of the box door is damaged, and the working time of the condenser is increased due to the fact that external moisture enters the box body are overcome.
Disclosure of Invention
The invention provides a method and a system method for monitoring the tightness of a fully-sealed box body based on moisture increment, aiming at overcoming the defects of large workload and the tightness of a box door of an opening detection method based on the fully-sealed box body in the prior art.
The technical scheme of the invention is as follows:
the invention provides a method for monitoring the sealing performance of a fully-sealed box based on moisture increment, which comprises the following steps:
s1: measuring t in fully-sealed box0Time vapor pressure P0And all ofThe volume V of the sealed box body is calculated to be t0Air moisture V.P in time full-sealed box0；
S2: setting the secondary t of the condenser in the fully-sealed box0The total working time from the moment to the beginning is S, the water discharging efficiency in the working process of the condenser is rho, and the water discharging amount in the working process of the condenser is calculated as follows: s.rho;
s3: measuring t in fully-sealed box0Water vapor pressure P at + S time1Calculating t0+ S moment air moisture V.P in box1；
S4: calculating the moisture increment delta V of the fully-sealed box body within the time length S, and comparing the moisture increment delta V with a preset threshold value VthComparing, if the water content increment delta V is larger than the preset threshold value VthA seal failure alarm is triggered.
In this scheme, when testing the interior vapor pressure of totally enclosed box, measure temperature and relative humidity in the totally enclosed box simultaneously.
In the scheme, the water increment delta V in the time length S is calculated according to the following formula:
ΔV＝V·P1+S·V·P0。
in the scheme, the humidity measured value at any moment in the fully-sealed box body exceeds the preset value to trigger a poor sealing alarm.
The second aspect of the present invention further provides a system for monitoring the sealing performance of a fully sealed box based on moisture increment, the system comprising: the water vapor pressure measuring module is used for measuring the water vapor pressure value in the fully-sealed box body; the condensation drying module is used for condensation drying in the fully-sealed box body; the temperature and humidity measuring module is used for measuring the temperature and humidity in the fully-sealed box body;
a data processing control module for processing the data of the moisture increment delta V and performing the moisture increment and a preset threshold value VthComparing and outputting a control instruction; and the alarm indication module is used for receiving the output instruction of the data processing control module and carrying out alarm response.
In the scheme, the data processing control module also compares and judges the temperature measured value with a preset value and outputs a control instruction to the alarm indicating module.
In the scheme, the data processing control module also has a wireless communication function and sends the control instruction to the alarm indication module in a wireless communication mode.
In the scheme, the alarm indication module has a wireless receiving function and is used for receiving the control instruction sent by the data processing control module in a wireless communication mode.
In the scheme, the alarm indication module is arranged outside the fully-sealed box body.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the invention, the box body moisture increment within the setting time of the fully-sealed box body is monitored, the box body tightness is judged by comparing with the preset threshold value, and an alarm instruction is given, so that the workload of monitoring the tightness of the fully-sealed box body is greatly reduced, the monitoring accuracy is improved, and the defect that the box door tightness is damaged by box opening monitoring is overcome.
Drawings
FIG. 1 is a flow chart of a method for monitoring the sealing performance of a fully sealed box based on moisture increment.
FIG. 2 is a block diagram of a system for monitoring the leak tightness of a fully sealed box based on moisture increment.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1, a first aspect of the present invention provides a method for monitoring the sealability of a fully sealed box based on moisture increment, comprising the following steps:
s1: measuring t in fully-sealed box0Time vapor pressure P0And the volume V of the fully-sealed box body, calculating t0Air moisture V.P in time full-sealed box0；
It should be noted that, the temperature and the relative humidity in the fully sealed box body are measured while the water vapor pressure in the fully sealed box body is measured.
S2: setting the secondary t of the condenser in the fully-sealed box0The total working time from the moment to the beginning is S, the water discharging efficiency in the working process of the condenser is rho, and the water discharging amount in the working process of the condenser is calculated as follows: s.rho;
s3: measuring t in fully-sealed box0Water vapor pressure P at + S time1Calculating t0+ S moment air moisture V.P in box1；
S4: calculating the moisture increment delta V of the fully-sealed box body within the time length S, and comparing the moisture increment delta V with a preset threshold value VthComparing, if the water content increment delta V is larger than the preset threshold value VthA seal failure alarm is triggered.
In the scheme, the water increment delta V in the time length S is calculated according to the following formula:
ΔV＝V·P1+S·ρ-V·P0
in the scheme, the humidity measured value at any moment in the fully-sealed box body exceeds the preset value to trigger a poor sealing alarm.
As shown in fig. 2, the second aspect of the present invention further provides a system for monitoring the sealability of a fully sealed box based on moisture increment, the system comprising: the water vapor pressure measuring module is used for measuring the water vapor pressure value in the fully-sealed box body; the condensation drying module is used for condensation drying in the fully-sealed box body; the temperature and humidity measuring module is used for measuring the temperature and humidity in the fully-sealed box body;
a data processing control module for processing the data of the moisture increment delta V and performing the moisture increment and a preset threshold value VthComparing and outputting a control instruction; and the alarm indication module is used for receiving the output instruction of the data processing control module and carrying out alarm response.
It should be noted that the alarm indication module of the present invention may include one or more of an indicator light, a buzzer, and a display panel, and an audible and visual alarm of the indicator light and the buzzer or a text indication alarm of the display panel.
In the scheme, the data processing control module also compares and judges the temperature measured value with a preset value and outputs a control instruction to the alarm indicating module.
In the scheme, the data processing control module also has a wireless communication function and sends the control instruction to the alarm indication module in a wireless communication mode.
In the scheme, the alarm indication module has a wireless receiving function and is used for receiving the control instruction sent by the data processing control module in a wireless communication mode.
In the scheme, the alarm indication module is arranged outside the fully-sealed box body.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (6)

1. A method for monitoring the sealing performance of a fully-sealed box based on moisture increment is characterized by comprising the following steps:
s1: measuring t in fully-sealed box0Time vapor pressure P0And the volume V of the fully-sealed box body, calculating t0Air moisture V.P in time full-sealed box0；
S2: setting the secondary t of the condenser in the fully-sealed box0The total working time from the moment to the beginning is S, the water discharging efficiency in the working process of the condenser is rho, and the water discharging amount in the working process of the condenser is calculated as follows: s.rho;
s3: measuring t in fully-sealed box0Water vapor pressure P at + S time1Calculating t0+ S moment air moisture V.P in box1；
S4: calculating the moisture increment delta V of the fully-sealed box body within the time length S, and comparing the moisture increment delta V with a preset threshold value VthComparing, if the water content increment delta V is larger than the preset threshold value VthTriggering a poor sealing alarm; the water increase Δ V over the time period S is calculated as follows:
ΔV＝V·P1+S·ρ-V·P0
when the vapor pressure in the fully-sealed box body is tested, the temperature and the relative humidity in the fully-sealed box body are measured simultaneously;
and triggering a poor sealing alarm when the humidity measured value at any moment in the fully-sealed box body exceeds a preset value.
2. A moisture increment-based hermetically sealed box tightness monitoring system which adopts a moisture increment-based hermetically sealed box tightness monitoring method according to claim 1, wherein the system comprises: the water vapor pressure measuring module is used for measuring the water vapor pressure value in the fully-sealed box body; the condensation drying module is used for condensation drying in the fully-sealed box body; the temperature and humidity measuring module is used for measuring the temperature and humidity in the fully-sealed box body;
a data processing control module for processing the data of the moisture increment delta V and performing the moisture increment and a preset threshold value VthComparing and outputting a control instruction; and the alarm indication module is used for receiving the output instruction of the data processing control module and carrying out alarm response.
3. The system for monitoring the tightness of the fully sealed box based on the moisture increment as recited in claim 2, wherein the data processing control module further performs a comparison judgment between a temperature measurement value and a preset value and outputs a control command to the alarm indication module.
4. The moisture increment-based hermetically-sealed box tightness monitoring system according to claim 2, wherein the data processing control module further has a wireless communication function, and sends the control command to the alarm indication module in a wireless communication manner.
5. The system for monitoring the tightness of the fully sealed box based on the moisture increment as recited in claim 4, wherein the alarm indication module has a wireless receiving function and is used for receiving a control instruction sent by the data processing control module in a wireless communication mode.
6. The system for monitoring the tightness of the fully sealed box based on the moisture increment according to any one of claims 2 to 5, wherein the alarm indication module is arranged outside the fully sealed box.
CN201910544439.3A 2019-06-21 2019-06-21 Method and system for monitoring sealing performance of fully-sealed box based on moisture increment Active CN110274738B (en)

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CN201910544439.3A CN110274738B (en) 2019-06-21 2019-06-21 Method and system for monitoring sealing performance of fully-sealed box based on moisture increment

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201666840U (en) * 2010-04-07 2010-12-08 苏州宝骅机械技术有限公司 Sealing performance detector of sealing element
CN201716155U (en) * 2010-04-04 2011-01-19 苏州宝骅机械技术有限公司 Sealing property detector for sealing parts
JP2013253747A (en) * 2012-06-07 2013-12-19 Ebara Refrigeration Equipment & Systems Co Ltd Absorption heat pump and method of operating absorption heat pump
CN103728105A (en) * 2013-12-31 2014-04-16 苏州宝骅机械技术有限公司 Quantitative leak detection device of pressure system
CN204007693U (en) * 2014-04-14 2014-12-10 北京国信智科科技有限公司 A kind of sealed packet vanning environmental parameter detection system
CN206960737U (en) * 2017-03-24 2018-02-02 中国南方电网有限责任公司超高压输电公司贵阳局 A kind of cable splice closure sealing monitoring system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201716155U (en) * 2010-04-04 2011-01-19 苏州宝骅机械技术有限公司 Sealing property detector for sealing parts
CN201666840U (en) * 2010-04-07 2010-12-08 苏州宝骅机械技术有限公司 Sealing performance detector of sealing element
JP2013253747A (en) * 2012-06-07 2013-12-19 Ebara Refrigeration Equipment & Systems Co Ltd Absorption heat pump and method of operating absorption heat pump
CN103728105A (en) * 2013-12-31 2014-04-16 苏州宝骅机械技术有限公司 Quantitative leak detection device of pressure system
CN204007693U (en) * 2014-04-14 2014-12-10 北京国信智科科技有限公司 A kind of sealed packet vanning environmental parameter detection system
CN206960737U (en) * 2017-03-24 2018-02-02 中国南方电网有限责任公司超高压输电公司贵阳局 A kind of cable splice closure sealing monitoring system

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