Intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear

Abstract

The utility model discloses an SF6 gas insulated metal-enclosed switchgear intelligent leak detection device, which comprises a host and a plurality of detection parts, the detection parts are in contact with the host through gas pipes, each detection part comprises a gas filter, a gas mold cover and a sealing band, the gas filter is connected to a hand valve switch on the gas mold cover through a gas pipe, and the sealing band is connected to the gas mold cover through a gas pipe. The end part of the gas mold cover is connected with a sealing strap, the sealing strap is bound on the SF6 gas insulated metal-enclosed switchgear, and the gas filter is connected to a host through a gas pipe and is switched on and off in real time by using a hand valve. The SF6 gas-insulated metal-enclosed switchgear leak detection device has the advantages that the detection points are wrapped by the gas mold cover with excellent sealing performance, the detection part is conveniently fixed on the SF6 gas-insulated metal-enclosed switchgear by the sealing bridle, a plurality of leakage points can be detected at the same time, each detection point can be independently controlled, and the leak detection efficiency is high; the gas mold cover can be repeatedly used, the labor intensity is small, installation and operation are convenient, and the maintenance complexity is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of SF6 gas insulated metal-enclosed switchgear intelligent leak detection device, belong to pipeline leak detection technical field. BACKGROUND

[0002] Generally, SF6 gas insulated metal-enclosed switchgear adopts cover method, partial bandaging method, pressure drop method etc. in quantitative leak detection work in handover acceptance test. The most commonly used in work is partial bandaging method, which uses plastic film to close and bandage SF6 gas insulated metal-enclosed switchgear flange joint, pipeline interface etc. to collect leakage gas. However, plastic film is easy to break, not reusable, and leak detection device can only monitor one leakage point, which is low in efficiency and cumbersome to collect. SUMMARY

[0003] The utility model solves technical problems, to provide a kind of SF6 gas insulated metal-enclosed switchgear intelligent leak detection device, the device uses sealing band to close and bandage detection part with gas mold cover, is wrapped and fixed on pipeline, is fixed conveniently, can detect multiple leakage points, greatly improve leak detection efficiency;And gas mold cover can be reused, bandaging operation is standard, and labor intensity is small.

[0004] The utility model discloses a kind of SF6 gas insulated metal-enclosed switchgear intelligent leak detection device, including host computer and detection part, detection part has multiple, the detection part is connected with the host computer by gas pipe, the detection part includes gas filter, gas mold cover and sealing band, the gas filter is placed in gas mold cover interior, and is connected with external gas pipe by hand valve, the end of the gas mold cover is connected with the sealing band, the sealing band is bandaged and tied on SF6 gas insulated metal-enclosed switchgear, the gas filter is connected to the host computer by the gas pipe.

[0005] The host computer includes industrial computer, SF6 pipeline type sensor, SF6 sensor analysis system, solenoid valve and air pump control system, short message system, air pump and solenoid valve.

[0006] The solenoid valve is provided with multiple, multiple solenoid valves are connected to the air pump, the air pump is connected with SF6 pipeline type sensor, the SF6 pipeline type sensor is connected with SF6 sensor analysis system, the SF6 sensor analysis system is connected with industrial computer, the industrial computer is connected with the short message system and the solenoid valve and air pump control system, the solenoid valve and air pump control system are connected with the air pump.

[0007] The lower part of the sealing band is bowl-shaped structure, and the lower part of the sealing band is connected with a rubber pad layer.

[0008] The gas filter is connected to the solenoid valve via the gas pipe.

[0009] The detection section also includes multiple detection heads, each of which is connected to a corresponding solenoid valve and corresponds to a detection point.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The present invention relates to an intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear, which is wrapped with an air mold cover and the detection part is fixed to the pipeline with a sealing strap for convenient fixation;

[0012] 2. The present invention provides an intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear, which can detect multiple leak points simultaneously, and each detection point can be controlled independently, greatly improving the leak detection efficiency.

[0013] 3. The air mold cover of the intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear of this utility model is reusable, the wrapping operation is standardized, and the labor intensity is low. Attached Figure Description

[0014] Fig. 1 This is a front view structural schematic diagram of an intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to the present invention.

[0015] Fig. 2 This is a three-dimensional structural diagram of the sealing band of an intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to the present invention.

[0016] Fig. 3 This is a diagram showing the overall topology of an intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to this utility model.

[0017] In the diagram: 1 is the main unit, 2 is the detection unit, 21 is the gas filter, 22 is the inflatable cover, 23 is the sealing band, 3 is the gas pipe, and 4 is the SF6 gas-insulated metal-enclosed switchgear. Detailed Implementation

[0018] The following is combined with Figs. 1-3 The present invention will be further described below, but the scope of protection of the present invention is not limited to the contents described herein.

[0019] Example:

[0020] An intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear includes a main unit 1 and a detection section 2. The detection section 2 comprises multiple detection sections, which are connected to the main unit 1 via air pipes 3. Each detection section 2 includes a gas filter 21, an inflatable cover 22, and a sealing strap 23. The gas filter 21 is placed inside the inflatable cover 22 and connected to an external air pipe via a manual valve. The inflatable cover 22 is made of inflatable material, and the sealing strap 23 is connected to the end of the inflatable cover 22. The sealing strap 23 is wrapped and bound to the SF6 gas-insulated metal-enclosed switchgear 4. The gas filter 21 is connected to the main unit 1 via air pipes 3.

[0021] The main unit 1 includes an industrial computer, an SF6 pipeline sensor, an SF6 sensor analysis system, a solenoid valve and air pump control system, an SMS system, an air pump, and solenoid valves. There are multiple solenoid valves, and all of them are connected to the air pump. The air pump is connected to the SF6 pipeline sensor, the SF6 pipeline sensor is connected to the SF6 sensor analysis system, the SF6 sensor analysis system is connected to the industrial computer, the industrial computer is connected to the SMS system and the solenoid valve and air pump control system, and the solenoid valve and air pump control system is connected to the air pump.

[0022] The lower part of the sealing band 23 has a bowl-shaped structure, and a rubber pad layer 24 is connected to the lower part of the sealing band 23 to accommodate SF6 gas-insulated metal-enclosed switchgear 4 of different specifications.

[0023] The detection section 2 also includes multiple detection heads, each of which is connected to a corresponding solenoid valve and each detection head corresponds to a detection point.

[0024] Host 2 is a single-board computer with a 7-inch screen and an RS485 communication interface.

[0025] The power module used is Foxconn JMD70-125, an AC220V to DC12V power module with a maximum output power of 72W.

[0026] The high-precision pipeline-type SF6 sensor uses the NDIR infrared absorption method, with a measurement range of 0-50ppm and a resolution of 0.01ppm.

[0027] The solenoid valve and air pump control board's main function is for a single-board computer to send commands via an RS485 interface to control the on / off state of the solenoid valve and air pump.

[0028] The SF6 analysis circuit board's main function is to allow a single-board computer to send commands via an RS485 interface to collect SF6 sensor values.

[0029] When using this device, first wrap the inflatable cover 22 around the SF6 gas-insulated metal-enclosed switchgear 4, then wrap the detection points, and finally open the main unit.

[0030] The usage process of the host is as follows:

[0031] S1. System power-on, set the scheduled time;

[0032] S2. Upon reaching the set time, clean the channel for 5 minutes;

[0033] S3, Channel 1 detection for 5 minutes;

[0034] S4. Clean the channel for 5 minutes;

[0035] S5, Channel 2 detection for 5 minutes;

[0036] S6. Test all channels in turn;

[0037] S7. After the test is completed, the test results for each channel will be sent to the designated mobile phone via SMS.

[0038] Although the technical solutions of this utility model have been described and enumerated in detail, it should be understood that modifications to the above embodiments or the adoption of equivalent alternatives are obvious to those skilled in the art. Such modifications or improvements made without departing from the spirit of this utility model are all within the scope of protection claimed by this utility model.

Claims

1. An intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear, comprising a main unit (1) and a detection part (2), characterized in that, There are multiple detection parts (2). The detection parts (2) are connected to the host (1) through air pipes (3). The detection parts (2) include a gas filter (21), an air mold cover (22) and a sealing strap (23). The gas filter (21) is placed inside the air mold cover (22) and connected to the external air pipe through a hand valve. The end of the air mold cover (22) is connected to the sealing strap (23). The sealing strap (23) is wrapped and tied to the SF6 gas-insulated metal-enclosed switchgear (4). The gas filter (21) is connected to the host (1) through the air pipes (3).

2. The intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The host (1) includes an industrial computer, an SF6 pipeline sensor, an SF6 sensor analysis system, a solenoid valve and air pump control system, an SMS system, an air pump and a solenoid valve.

3. The intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to claim 2, characterized in that: The system includes multiple solenoid valves, each connected to the air pump. The air pump is connected to an SF6 pipeline sensor, which is connected to an SF6 sensor analysis system. The SF6 sensor analysis system is connected to an industrial computer, which is connected to the SMS system and the solenoid valve and air pump control system. The solenoid valve and air pump control system is connected to the air pump.

4. The intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The lower part of the sealing band (23) has a bowl-shaped structure, and a rubber pad layer is connected to the lower part of the sealing band (23).

5. The intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to claim 2, characterized in that: The gas filter (21) is connected to the solenoid valve via the gas pipe (3).

6. The intelligent leak detection device for SF6 gas-insulated metal-enclosed switchgear according to claim 3, characterized in that: The detection part (2) also includes multiple detection heads, each of which is connected to a corresponding solenoid valve and each detection head corresponds to a detection point.

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