CN110441005A - A kind of SF6 density monitor gas leakage device for fast detecting and method - Google Patents

Abstract

The present invention relates to a kind of SF6 density relay air leakage rapid detection device and method, the device comprises a sealing bag and a detection device arranged on it, the sealing bag is provided with a sealable opening, and the detection device is provided with a control module, a vacuum pump, an air pressure Sensors and halogen gas sensors, the detection device is provided with a suction port facing the inside of the sealed bag, a first detection port, a second detection port and an exhaust port facing the outside of the sealed bag. The inlet and exhaust pipes of the vacuum pump are respectively connected to the suction port, The exhaust port is connected, and the air pressure sensor and the halogen gas sensor are respectively set on the first detection port and the second detection port to detect the vacuum degree inside the sealed bag and the leakage of SF6 gas. The sensor is connected, and the output end of the control module is connected with the vacuum pump to control the work of the vacuum pump. The device and the method are beneficial to efficiently and accurately detecting the SF6 gas leakage of the SF6 density relay.

Description

A device and method for rapid detection of air leakage of SF6 density relay

technical field

The invention relates to the technical field of electrical equipment detection, in particular to an SF6 density relay air leakage rapid detection device and method.

Background technique

Substation plays the role of "energy transmission artery" in economic and social development, and its importance is self-evident. As a colorless, odorless, non-toxic and non-combustible gas arc extinguishing medium, SF6 has been widely used in electrical equipment, replacing traditional oil medium arc extinguishing electrical equipment, and has been widely used in power grids. However, SF6 gas leakage defects often occur in the daily operation of SF6 electrical equipment, and the leakage points mainly appear on the flange surface or SF6 density relay. The commonly used leak detection method today is to use SF6 halogen gas detector to probe into the leak point after a certain period of time after sealing and bandaging, or directly use foam detection method to perform qualitative leak detection of SF6 gas.

The existing test methods have low accuracy and the sealing and bandaging process is cumbersome. Inadequate sealing and packing, small amount of gas leakage, and insufficient precision of the SF6 halogen gas detector cannot find out whether a leakage has occurred. Due to the limitations of current detection methods, the probability of false positives and false negatives in SF6 gas detection is relatively high.

Contents of the invention

The object of the present invention is to provide a kind of SF6 density relay air leakage rapid detection device and method, this device and method are conducive to efficiently and accurately detecting the SF6 gas leakage situation of SF6 density relay.

In order to achieve the above object, the technical solution of the present invention is: a kind of SF6 density relay air leakage fast detection device, comprises the detection device that is arranged on the sealing bag and sealed bag, is provided with for taking and placing SF6 density relay on the described sealing bag The opening can be sealed. The detection device is equipped with a control module, a vacuum pump, an air pressure sensor and a halogen gas sensor. The detection device is provided with an air suction port facing the inner side of the sealed bag, a first detection port, a second detection port and a sealing port. The exhaust port on the outside of the bag, the inlet and exhaust pipes of the vacuum pump are respectively connected with the suction port and the exhaust port, and the air pressure sensor and the halogen gas sensor are respectively arranged on the first detection port and the second detection port , to detect the vacuum degree inside the sealed bag and the leakage of SF6 gas, the input end of the control module is electrically connected to the air pressure sensor and the halogen gas sensor respectively, and the output end of the control module is electrically connected to the vacuum pump , to control the work of the vacuum pump.

Further, the sealable opening includes a sealed zipper structure with a sealed lock, the inner side of the sealed lock and the zipper opening of the sealed zipper are provided with sealing materials, and the sealed zipper is opened to put in the SF6 density relay, and Let the air pipe interface of the SF6 density relay protrude from the sealing lock, and seal the sealable opening by closing the sealing zipper and the sealing lock.

Further, a wireless communication module is provided in the detection device, and the control module is electrically connected to the wireless communication module to upload detection information.

The present invention also provides a kind of SF6 density relay air leakage fast detection method, comprises the following steps:

S1. Unplug the secondary line or aviation plug connected to the SF6 density relay, then put the SF6 density relay into a sealed bag, and seal the sealable opening of the sealed bag;

S2. The control module starts the vacuum pump in the detection device, extracts the air inside the sealed bag from the air suction port and discharges it from the exhaust port, and at the same time detects the vacuum degree in the sealed bag through the air pressure sensor. When the vacuum degree reaches the set threshold, the control module controls The vacuum pump stops working;

S3. The control module judges the leakage of SF6 gas according to the detection data of the air pressure sensor and the halogen gas sensor.

Further, in step S2, if the vacuum degree in the sealed bag cannot meet the requirement of the set threshold all the time, then return to step S1, and reseal the sealable opening of the sealed bag.

Further, in step S3, the control module calculates according to the detection data uploaded by the air pressure sensor and the halogen gas sensor, judges whether a trace amount of SF6 gas leakage occurs and calculates the leakage speed.

Further, in step S3, the control module judges the leakage of SF6 gas as follows: when the halogen gas sensor detects SF6 gas, it is judged that the SF6 gas leaks, and the air pressure change in the sealed bag is detected by the air pressure sensor within a certain period of time Calculate the leakage amount and leakage speed of SF6 gas accordingly; when the air pressure sensor detects a change in air pressure, but the halogen gas sensor does not detect SF6 gas, it is judged that the sealed bag is leaking, and at this time return to step S1 and reseal the sealed bag. Sealable opening.

Compared with the prior art, the present invention has the following beneficial effects: It provides a rapid detection device and method for SF6 density relay air leakage, and overcomes the existing test method through double detection of halogen gas and internal pressure of the detected object. The problems of cumbersome operation and low accuracy improve the reliability and accuracy of detection, and shorten the detection time at the same time, which has strong practicability and broad application prospects.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a partial structure of a sealable opening in an embodiment of the present invention.

In the figure, 1. sealing bag, 2. detection device, 3. sealable opening, 31. sealing lock, 311. body of sealing lock, 312. fixing ring of sealing bag, 313. sealing gel, 32. sealing zipper, 4. Control module, 5. Vacuum pump, 6. Air pressure sensor, 7. Halogen gas sensor, 8. Air extraction port, 9. First detection port, 10. Second detection port, 11. Exhaust port, 12. Wireless communication module , 13, SF6 density relay.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention provides a kind of SF6 density relay gas leakage rapid detection device, as shown in Figure 1, comprises sealing bag 1 and is located at the detection device 2 on the sealing bag 1, is provided with on the sealing bag 1 and is used for taking and placing SF6 density relay 13 The sealable opening 3 of the detection device 2 is equipped with a control module 4 (in this embodiment, an STM32F730 chip), a vacuum pump 5, an air pressure sensor 6 and a halogen gas sensor 7, and the detection device 2 is provided with an air suction port facing the inside of the sealed bag 1 8. The first detection port 9, the second detection port 10 and the exhaust port 11 towards the outside of the sealed bag 1, the inlet and exhaust pipes of the vacuum pump 5 are respectively connected with the air inlet 8 and the exhaust port 11, the air pressure sensor 6, the halogen The gas sensor 7 is respectively arranged on the first detection port 9 and the second detection port 10 to detect the vacuum degree inside the sealed bag 1 and the leakage of SF6 gas. The input end of the control module 4 is connected to the air pressure sensor 6 and the halogen gas sensor 7 Electrically connected, the output end of the control module 4 is electrically connected to the vacuum pump 5 to control the vacuum pump 5 to work.

The detection device 2 is also provided with a wireless communication module 12, and the control module 4 is electrically connected with the wireless communication module 12 to upload detection information to a mobile terminal or a host computer. In this embodiment, the wireless communication module 12 is a Bluetooth module JDY-10M.

As shown in Figure 2, in the present embodiment, the sealable opening 3 includes a sealing zipper 32 structure with a sealing lock 31, the inner side of the sealing lock 31 and the zipper opening of the sealing zipper 32 are all provided with sealing materials, and the sealing zipper 32 Open to put in the SF6 density relay, and let the air pipe interface of the SF6 density relay protrude from the sealing lock 31, and seal the sealable opening by closing the sealing zipper 32 and the sealing lock 31 to achieve sealing. Specifically, the sealing lock 31 includes a sealing lock body 311 , a sealing bag fixing ring 312 and a sealing gel (sealing material) 313 . The sealing bag is installed on the sealing lock body 311 and the sealing bag fixing ring 312 by crimping. The inner side of the sealing bag fixing ring 312 is provided with sealing gel, which can be in close contact with the air pipe interface of the SF6 density relay to effectively ensure the sealing effect.

The present invention also provides a SF6 density relay air leakage rapid detection method corresponding to the above device, comprising the following steps:

S1. Unplug the secondary line or aviation plug connected to the SF6 density relay, separate the SF6 density relay, and then put the SF6 density relay into a sealed bag to seal the sealable opening of the sealed bag to effectively ensure the sealing effect.

S2. The control module starts the vacuum pump in the detection device, extracts the air inside the sealed bag from the air suction port and discharges it from the exhaust port, and at the same time detects the vacuum degree in the sealed bag through the air pressure sensor. When the vacuum degree reaches the set threshold, the control module controls The vacuum pump stops working. If the vacuum degree in the sealed bag cannot meet the requirement of the set threshold all the time, it means that the sealing operation of the sealed bag is not good, then return to step S1, and reseal the sealable opening of the sealed bag.

S3. The control module judges the vacuum degree inside the sealed bag and the leakage of SF6 gas according to the detection data of the air pressure sensor and the halogen gas sensor. Specifically, the control module judges the leakage of SF6 gas as follows: when the halogen gas sensor detects SF6 gas, it is judged that the SF6 gas leaks, and the air pressure change in the sealed bag is detected by the air pressure sensor within a certain period of time. Calculate the leakage amount and leakage speed of SF6 gas; when the air pressure sensor detects changes in air pressure, but the halogen gas sensor does not detect SF6 gas, it is judged that the sealed bag is leaking, and at this time, return to step S1, and reseal the sealable opening of the sealed bag. Through the complementarity of the air pressure sensor and the halogen gas sensor, the detection accuracy is improved.

S4. After detecting the leakage of SF6 gas, the control module uploads to the mobile terminal or the host computer through the wireless communication module.

The above are the preferred embodiments of the present invention, and all changes made according to the technical solution of the present invention, when the functional effect produced does not exceed the scope of the technical solution of the present invention, all belong to the protection scope of the present invention.

Claims (6)

1. a kind of SF6 density monitor gas leakage device for fast detecting, which is characterized in that including hermetic bag and in hermetic bag Detection device, the hermetic bag are equipped with the sealable opening for picking and placing SF6 density monitor, are equipped in the detection device Control module, vacuum pump, baroceptor and halogen gas sensor offer in the detection device towards on the inside of hermetic bag Bleeding point, the first detection mouth, the second detection mouth and towards the exhaust outlet on the outside of hermetic bag, the inlet and outlet of the vacuum pump Pipe is connected to the bleeding point, exhaust outlet respectively, and the baroceptor, halogen gas sensor are respectively arranged on first inspection Survey mouth, in the second detection mouth, to detect the vacuum degree and SF6 gas leakage situation inside hermetic bag, the control module it is defeated Enter end to be electrically connected with the baroceptor, halogen gas sensor respectively, the output end of the control module and described true Sky pump is electrically connected, to control vacuum pump work.

2. a kind of SF6 density monitor gas leakage device for fast detecting according to claim 1, which is characterized in that it is described can Sealed opening includes the pressure-sealing zipper structure with sealing lock, and the inside of the sealing lock and the slide fastener mouth of pressure-sealing zipper are equal Equipped with sealing material, the pressure-sealing zipper is opened to be put into SF6 density monitor, and allows the air pipe interface of SF6 density monitor It is stretched out from sealing lock, is latched by closing seam zipper and sealing, seal sealable opening.

3. a kind of SF6 density monitor gas leakage device for fast detecting according to claim 1, which is characterized in that the inspection It surveys and is equipped with wireless communication module in device, the control module and wireless communication module are electrically connected, to upload detection information.

4. a kind of SF6 density monitor gas leakage rapid detection method, which comprises the following steps:

S1, secondary line or aviation plug that SF6 density monitor connects are pulled up, SF6 density monitor is then put into sealing In bag, the sealable opening of hermetic bag is sealed；

Vacuum pump in S2, control module starting detection device, extracts hermetic bag internal gas from bleeding point and arranges from exhaust outlet Out, while by baroceptor the vacuum degree in hermetic bag is detected, when vacuum degree reaches given threshold, control module control Vacuum pump stops working；

S3, control module judge the leakage feelings of SF6 gas according to the detection data of baroceptor and halogen gas sensor Condition.

5. a kind of SF6 density monitor gas leakage rapid detection method according to claim 4, which is characterized in that step S2 In, if the vacuum degree in hermetic bag is unable to satisfy always the requirement of given threshold, return step S1 reseals hermetic bag Sealable opening.

6. a kind of SF6 density monitor gas leakage rapid detection method according to claim 4, which is characterized in that step S3 In, the control module judges the leakage situation of SF6 gas as follows: when halogen gas sensor detects SF6 gas When, judge that SF6 gas leaks, and the air pressure change amount in certain time in hermetic bag is detected by baroceptor, counts accordingly Calculate the leakage rate and leakage rate of SF6 gas；When baroceptor detects air pressure change, and halogen gas sensor does not detect When to SF6 gas, judges hermetic bag gas leakage, at this time return step S1, reseal the sealable opening of hermetic bag.