CN110441005B - SF6 density relay air leakage rapid detection device and method - Google Patents
SF6 density relay air leakage rapid detection device and method Download PDFInfo
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- CN110441005B CN110441005B CN201910690964.6A CN201910690964A CN110441005B CN 110441005 B CN110441005 B CN 110441005B CN 201910690964 A CN201910690964 A CN 201910690964A CN 110441005 B CN110441005 B CN 110441005B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention relates to a quick detection device and a method for gas leakage of an SF6 density relay, the device comprises a sealing bag and a detection device arranged on the sealing bag, a sealable opening is arranged on the sealing bag, a control module, a vacuum pump, a pressure sensor and a halogen gas sensor are arranged in the detection device, the detection device is provided with an air suction opening facing the inner side of the sealing bag, a first detection opening, a second detection opening and an air exhaust opening facing the outer side of the sealing bag, an air inlet pipe and an air exhaust pipe of the vacuum pump are respectively communicated with the air suction opening and the air exhaust opening, the pressure sensor and the halogen gas sensor are respectively arranged on the first detection opening and the second detection opening, in order to detect the inside vacuum degree of seal bag and the gaseous leakage condition of SF6, control module's input is connected with baroceptor, halogen gas sensor respectively, control module's output with vacuum pump connection to control vacuum pump work. The device and the method are favorable for efficiently and accurately detecting the SF6 gas leakage condition of the SF6 density relay.
Description
Technical Field
The invention relates to the technical field of electrical equipment detection, in particular to a device and a method for quickly detecting air leakage of an SF6 density relay.
Background
The transformer substation plays a role of an energy transmission main artery in the development of the economic society, and the importance is self-evident. SF6 is used as a colorless, odorless, nontoxic and noncombustible gas arc-extinguishing medium, is widely applied to electrical equipment, replaces the traditional oil medium arc-extinguishing electrical equipment, and is widely applied to power grids. However, during the daily operation of the SF6 electrical equipment, the defect of SF6 gas leakage often occurs, and leakage points mainly occur on a flange face or an SF6 density relay. The current commonly used leak detection method is to use a SF6 halogen gas detector to probe into the leakage point after a certain time after the leakage point is sealed and wrapped or directly use a foam detection method to carry out SF6 gas qualitative leak detection.
The existing testing method has low accuracy and complicated sealing and binding process. The leakage can not be found out due to the fact that the sealing wrapping is not tight, the gas leakage amount is small, the accuracy of the SF6 halogen gas detector is not enough, and the like. Limited by the current detection means, the detection probability of the SF6 gas is higher in false alarm and missing report.
Disclosure of Invention
The invention aims to provide a device and a method for rapidly detecting air leakage of an SF6 density relay, which are favorable for efficiently and accurately detecting the SF6 air leakage condition of an SF6 density relay.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a SF6 density relay gas leakage quick detection device, includes the sealed bag and locates the detection device on the sealed bag, be equipped with on the sealed bag and be used for getting the sealable opening of putting SF6 density relay, be equipped with control module, vacuum pump, baroceptor and halogen gas sensor in the detection device, last extraction opening, first detection mouth, the second of offering towards the sealed bag inboard and the gas vent outside towards the sealed bag of offering of detection device, the air inlet and exhaust pipe of vacuum pump respectively with extraction opening, gas vent intercommunication, baroceptor, halogen gas sensor locate respectively on first detection mouth, the second detect the mouth to detect the inside vacuum of sealed bag and the SF6 gas leakage condition, control module's input respectively with baroceptor, halogen gas sensor electric connection, control module's output with vacuum pump electric connection, to control the operation of the vacuum pump.
Further, can seal the opening including having sealed hasp sealed zip fastener structure, sealed hasp's inboard and sealed zip fastener mouth all are equipped with sealing material, sealed zip fastener is opened in order to put into SF6 density relay to let SF6 density relay's trachea interface stretch out from sealed hasp, through closed sealed zip fastener and sealed hasp, seal and can seal the opening.
Furthermore, a wireless communication module is arranged in the detection device, and the control module is electrically connected with the wireless communication module to upload detection information.
The invention also provides a quick detection method for air leakage of the SF6 density relay, which comprises the following steps:
s1, pulling out a secondary wire or an aviation plug connected with the SF6 density relay, then putting the SF6 density relay into a sealing bag, and sealing a sealable opening of the sealing bag;
s2, the control module starts a vacuum pump in the detection device, gas in the sealed bag is extracted from the extraction opening and exhausted from the exhaust opening, meanwhile, the vacuum degree in the sealed bag is detected through the air pressure sensor, and when the vacuum degree reaches a set threshold value, the control module controls the vacuum pump to stop working;
and S3, the control module judges the SF6 gas leakage condition according to the detection data of the gas pressure sensor and the halogen gas sensor.
Further, in step S2, if the vacuum degree in the sealed bag can not meet the requirement of the set threshold, the process returns to step S1 to reseal the sealable opening of the sealed bag.
Further, in step S3, the control module calculates the detection data uploaded by the gas pressure sensor and the halogen gas sensor, determines whether a leakage of the small amount of SF6 gas has occurred, and calculates the leakage rate.
Further, in step S3, the control module determines the SF6 gas leakage as follows: when the halogen gas sensor detects SF6 gas, the leakage of SF6 gas is judged, the variation of the air pressure in the sealed bag within a certain time is detected through the air pressure sensor, and the leakage amount and the leakage speed of the SF6 gas are calculated according to the variation of the air pressure in the sealed bag; when the gas pressure sensor detects the gas pressure change and the halogen gas sensor does not detect the SF6 gas, it is determined that the sealing bag is gas-leaking, and the process returns to step S1 to reseal the sealable opening of the sealing bag.
Compared with the prior art, the invention has the following beneficial effects: the SF6 density relay air leakage rapid detection device and method overcome the problems of complex operation, low accuracy and the like of the existing test method by carrying out double detection on the halogen gas and the internal pressure of the detected object, improve the reliability and the accuracy of detection, shorten the detection time, and have strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic view of a portion of a sealable opening in an embodiment of the present invention.
In the figure, 1, a sealing bag, 2, a detection device, 3, a sealable opening, 31, a sealing lock, 311, a sealing lock body, 312, a sealing bag fixing ring, 313, sealing gel, 32, a sealing zipper, 4, a control module, 5, a vacuum pump, 6, an air pressure sensor, 7, a halogen gas sensor, 8, an air pumping port, 9, a first detection port, 10, a second detection port, 11, an exhaust port, 12, a wireless communication module, 13 and an SF6 density relay.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The invention provides a quick detection device for air leakage of an SF6 density relay, as shown in figure 1, the quick detection device comprises a sealing bag 1 and a detection device 2 arranged on the sealing bag 1, a sealable opening 3 for taking and placing an SF6 density relay 13 is arranged on the sealing bag 1, a control module 4 (an STM32F730 chip in the embodiment) is arranged in the detection device 2, a vacuum pump 5, an air pressure sensor 6 and a halogen gas sensor 7 are arranged in the detection device 2, an air suction opening 8, a first detection opening 9, a second detection opening 10 and an air exhaust opening 11 facing the outer side of the sealing bag 1 are formed in the detection device 2, an air inlet pipe and an air exhaust pipe of the vacuum pump 5 are respectively communicated with the air suction opening 8 and the air exhaust opening 11, the air pressure sensor 6 and the halogen gas sensor 7 are respectively arranged on the first detection opening 9 and the second detection opening 10 to detect the vacuum degree and SF6 gas leakage condition in the sealing bag 1, and an input end of the control module 4 is respectively communicated with the air pressure sensor 6, The halogen gas sensor 7 is electrically connected, and the output end of the control module 4 is electrically connected with the vacuum pump 5 to control the vacuum pump 5 to work.
The detection device 2 is also internally provided with a wireless communication module 12, and the control module 4 is electrically connected with the wireless communication module 12 so as to upload detection information to the mobile terminal or an upper computer. In this embodiment, the wireless communication module 12 is a Bluetooth module JDY-10M.
In the embodiment shown in fig. 2, the sealable opening 3 comprises a sealing zipper 32 structure having a sealing zipper 31, the inner side of the sealing zipper 31 and the zipper mouth of the sealing zipper 32 are both provided with sealing material, the sealing zipper 32 is opened to accommodate the SF6 density relay, and the air pipe port of the SF6 density relay is allowed to protrude from the sealing zipper 31, and the sealing zipper 32 and the sealing zipper 31 are closed to seal the sealable opening. Specifically, the seal lock 31 includes a seal lock body 311, a seal bag fixing ring 312, and a seal gel (seal material) 313. Install the sealed bag through the crimping mode at sealed hasp body 311 and sealed bag fixed ring 312, sealed bag fixed ring 312 inboard is equipped with sealed gel, can with SF6 density relay's trachea interface in close contact with to effectively guarantee sealed effect.
The invention also provides a quick detection method for air leakage of the SF6 density relay corresponding to the device, which comprises the following steps:
s1, pulling out a secondary wire or an aviation plug connected with the SF6 density relay, enabling the SF6 density relay to be independent, then placing the SF6 density relay into a sealing bag, sealing a sealable opening of the sealing bag, and effectively ensuring the sealing effect.
S2, the control module starts a vacuum pump in the detection device, gas in the sealed bag is extracted from the air extraction opening and is exhausted from the air exhaust opening, meanwhile, the vacuum degree in the sealed bag is detected through the air pressure sensor, and when the vacuum degree reaches a set threshold value, the control module controls the vacuum pump to stop working. If the vacuum level in the pouch has not met the predetermined threshold, indicating that the pouch is not sealed properly, the process returns to step 1 to reseal the sealable opening of the pouch.
And S3, the control module judges the vacuum degree in the sealed bag and the SF6 gas leakage condition according to the detection data of the air pressure sensor and the halogen gas sensor. Specifically, the control module judges the leakage condition of the SF6 gas according to the following method: when the halogen gas sensor detects SF6 gas, the leakage of SF6 gas is judged, the variation of the air pressure in the sealed bag within a certain time is detected through the air pressure sensor, and the leakage amount and the leakage speed of the SF6 gas are calculated according to the variation of the air pressure in the sealed bag; when the gas pressure sensor detects the gas pressure change and the halogen gas sensor does not detect the SF6 gas, it is determined that the sealing bag is gas-leaking, and the process returns to step S1 to reseal the sealable opening of the sealing bag. The detection accuracy is improved through the complementation of the air pressure sensor and the halogen gas sensor.
And S4, after SF6 gas leakage is detected, the control module uploads the gas to the mobile terminal or an upper computer through the wireless communication module.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a quick detection device of SF6 density relay gas leakage, its characterized in that, includes the sealed bag and locates the detection device on the sealed bag, be equipped with on the sealed bag and be used for getting the sealable opening of putting SF6 density relay, be equipped with control module, vacuum pump, baroceptor and halogen gas sensor in the detection device, last extraction opening, first detection mouth, the second detection mouth and the gas vent towards the sealed bag outside of offering towards the sealed bag inboard of detection device, the air inlet and exhaust pipe of vacuum pump respectively with extraction opening, gas vent intercommunication, baroceptor, halogen gas sensor locate respectively on first detection mouth, the second detection mouth to detect the inside vacuum of sealed bag and the gaseous condition of leaking of SF6, control module's input respectively with baroceptor, halogen gas sensor electric connection, the output end of the control module is electrically connected with the vacuum pump so as to control the vacuum pump to work;
but sealing up the opening including the sealed zip fastener structure that has sealed hasp, sealed hasp's inboard and sealed zip fastener's zip fastener mouth all is equipped with sealing material, sealed zip fastener is opened in order to put into SF6 density relay to let SF6 density relay's trachea interface stretch out from sealed hasp, through closed sealed zip fastener and sealed hasp, seal up and to seal up the opening that can seal up.
2. The device as claimed in claim 1, wherein a wireless communication module is disposed in the detection device, and the control module is electrically connected to the wireless communication module for uploading the detection information.
3. A quick detection method for air leakage of an SF6 density relay is characterized by comprising the following steps:
s1, pulling out a secondary wire or an aviation plug connected with the SF6 density relay, then putting the SF6 density relay into a sealing bag, and sealing a sealable opening of the sealing bag;
s2, the control module starts a vacuum pump in the detection device, gas in the sealed bag is extracted from the extraction opening and exhausted from the exhaust opening, meanwhile, the vacuum degree in the sealed bag is detected through the air pressure sensor, and when the vacuum degree reaches a set threshold value, the control module controls the vacuum pump to stop working;
s3, the control module judges the SF6 gas leakage condition according to the detection data of the gas pressure sensor and the halogen gas sensor;
in step S3, the control module determines the SF6 gas leakage as follows: when the halogen gas sensor detects SF6 gas, the leakage of SF6 gas is judged, the variation of the air pressure in the sealed bag within a certain time is detected through the air pressure sensor, and the leakage amount and the leakage speed of the SF6 gas are calculated according to the variation of the air pressure in the sealed bag; when the air pressure sensor detects the air pressure change and the halogen gas sensor does not detect SF6 gas, judging that the sealing bag is air-leaked, and returning to the step S1 to reseal the sealable opening of the sealing bag;
but sealing up the opening including the sealed zip fastener structure that has sealed hasp, sealed hasp's inboard and sealed zip fastener's zip fastener mouth all is equipped with sealing material, sealed zip fastener is opened in order to put into SF6 density relay to let SF6 density relay's trachea interface stretch out from sealed hasp, through closed sealed zip fastener and sealed hasp, seal up and to seal up the opening that can seal up.
4. The SF6 density relay leakage rapid detection method of claim 3, wherein in step S2, if the vacuum in the sealed bag has not met the requirement of the set threshold, then returning to step S1, resealing the sealable opening of the sealed bag.
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| CN201910690964.6A CN110441005B (en) | 2019-07-29 | 2019-07-29 | SF6 density relay air leakage rapid detection device and method |
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| CN110441005B true CN110441005B (en) | 2021-08-31 |
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