CN103277665B - SF6 gas recoverable means of deflation - Google Patents

Abstract

The invention relates to a recyclable SF6 gas deflation device. The invention includes a gas recovery bottle, a high-pressure air pump connected to the gas recovery bottle through a first high-density plastic tube, and a gas flow control valve connected to the high-pressure gas pump through a second high-density plastic tube. The invention is easy to carry, easy to operate, greatly improves work efficiency, ensures personal safety, avoids environmental pollution, not only ensures the accuracy of signal transmission, but also effectively improves work efficiency, and can also recycle the released SF6 gas. The avoided direct discharge of SF6 gas endangers personal safety, protects the atmospheric environment, and realizes green and environmental maintenance.

Description

SF6 gas recyclable degassing device

technical field

The invention relates to a recyclable SF6 gas deflation device.

Background technique

When the SF6 equipment in the substation is overhauled, it is necessary to send the low pressure alarm and blocking signal of the SF6 density relay to the protection device to check the correctness and reliability of the low pressure alarm and blocking signal circuit. This work is essential and very important A task; when transmitting signals, maintenance personnel often use screwdrivers or other tools to push open the self-sealing valve at the inflation port of the equipment to deflate, and simulate the decrease of the pressure value to send a corresponding signal; If the pressure value in the density meter does not reach the specified value, it needs to be inflated and deflated repeatedly, resulting in low work efficiency, and it is easy to damage the sealing performance of the self-sealing valve port of the equipment; because the discharged SF6 gas enters the equipment Excessive high temperature decomposition will form toxic gas, which will cause personal injury to the maintenance personnel who carry out this work, and the discharged SF6 gas will also cause air pollution.

Contents of the invention

The technical problem to be solved by the present invention is to provide a safe, reliable, easy-to-operate and portable SF6 gas recyclable deflation device.

The present invention adopts following technical scheme:

The present invention comprises a gas recovery bottle, a high-pressure air pump connected to the gas recovery bottle through a first high-density plastic tube, and a gas flow control valve connected to the high-pressure gas pump through a second high-density plastic tube. There is a self-sealing joint, the front end is provided with a pressure gauge, the rear end is provided with a connecting plug-in, and the side end is provided with a gas cylinder valve connected to the first high-density plastic pipe. The high-density plastic pipe is connected with the first high-density plastic pipe. The upper end of the high-pressure air pump is provided with a handle, and the lower end is provided with a battery for driving its work. The front end of the battery is provided with a switch button, and the rear end is provided with a A connection slot matching the connection plug-in, a storage room for storing the second high-density plastic tube is provided in the high-pressure air pump, and a joint conversion device is provided at the end of the gas flow control valve.

The model of the high-pressure air pump is RB-400A.

The positive effects of the present invention are as follows:

The invention is easy to carry, easy to operate, greatly improves work efficiency, ensures personal safety, avoids environmental pollution, not only ensures the accuracy of signal transmission, but also effectively improves work efficiency, and can also recycle the released SF6 gas. The avoided direct discharge of SF6 gas endangers personal safety, protects the atmospheric environment, and realizes green and environmental maintenance. The advantages are as follows:

(1) Control the SF6 gas in the density meter by controlling the gas flow valve

Pressure solves the problem of lack of suitable tools for deflation and low work efficiency; the use of this valve also avoids the phenomenon of damage to equipment due to improper operation; through this device, work efficiency can be improved and waste of SF6 gas can be reduced.

(2) Use the recovery system to recover toxic SF6 gas, which solves the problem of directly discharging toxic SF6 gas to the work site when performing such work, without the need to discharge toxic gas into the atmosphere, which will cause harm to people and environmental pollution It avoids personal injury accidents caused by maintenance personnel working in an unsafe environment, and also reduces the pollution of SF6 gas to the atmospheric environment. Make the job site and people safer.

(3) The SF6 inflatable joint device configured in the present invention can be adapted to various manufacturers and types of equipment, so the device is also applicable to different equipment, so that the work efficiency is significantly improved. The application of this device avoids equipment damage accidents caused by improper operation, and correspondingly avoids power outages caused by equipment damage, thereby reducing production costs and ensuring reliable power supply for equipment and power grids.

Description of drawings

Accompanying drawing 1 is the structure diagram of the present invention.

Accompanying drawing 2 is the rear view structure diagram of the present invention.

Accompanying drawing 3 is the schematic diagram of the combined state structure of the present invention.

Accompanying drawing 4 is the rear view structure diagram of the combined state of the present invention.

Detailed ways

As shown in accompanying drawings 1-4, the present invention includes a gas recovery bottle 1, a high-pressure air pump 3 communicated with the gas recovery bottle 1 through a first high-density plastic tube 2, and a high-pressure air pump 3 connected with a second high-density plastic tube 8 The gas flow control valve 9 is connected, the top of the gas recovery bottle 1 is provided with a self-sealing joint 1-1, the front end is provided with a pressure gauge 1-2, the rear end is provided with a connecting plug-in 1-3, and the side end is provided with the first high The gas cylinder valves 1-4 connected with the high-density plastic pipe 2, the inlet end and the gas outlet end of the high-pressure air pump 3 are respectively connected with the second high-density plastic pipe 8 and the first high-density plastic pipe 2, and the high-pressure air pump 3. The upper end is provided with a handle 6, and the lower end is provided with a storage battery 4 for driving its work. The front end of the storage battery 4 is provided with a switch button 5, and the rear end is provided with a connection slot compatible with the connection plug-in 1-3. 7. The high-pressure air pump 3 is provided with a storage room for storing the second high-density plastic pipe 8 , and the end of the gas flow control valve 9 is provided with a joint conversion device 7 .

When the present invention is in use, first install the SF6 inflatable connector, close the valve between the density relay and the device body, and at this moment, the density relay meter has been filled with SF6 and is at the rated value; then slowly open the control gas flow valve on the connecting pipe of the SF6 inflatable connector, Discharge the SF6 gas in the density relay meter to the connecting pipe to reduce the pressure in the meter to the alarm value, close the control gas flow valve on the connecting pipe, and a low pressure alarm signal should be issued at this time; continue to open the connecting valve to make the pressure in the meter When it drops to the blocking value, a low pressure blocking signal should be issued at this time, that is, the signal transmission work is completed. Close the control gas flow valve on the connecting pipe, turn on the power switch of the high-pressure air pump, and the high-pressure air pump will run to press the SF6 gas released in the pipeline into the recovery cylinder with check valve, and the recovery work is completed.

The joint conversion device of the present invention adopts a self-sealing joint with extremely high sealing performance, and the high-density plastic pipe can withstand a certain pressure, thereby ensuring that the SF6 gas does not leak; when the high-pressure air pump works, it can reach 0.6Mpa, and the SF6 gas in the pipe is pressed into the recycling steel cylinder , The recovery cylinder can withstand a certain pressure; the deflation and SF6 gas recovery can be completed through simple operations.

The SF6 gas recyclable deflation device is suitable for the signal transmission of density relays of SF6 inflatable equipment of different manufacturers, different voltage levels, and various types. It is also applicable to the annual inspection test of substation equipment and infrastructure acceptance work.

(1) The key point of controlling the gas flow valve is flow adjustment; ordinary valves need to release less SF6 gas due to their larger inner diameters. It is still difficult to grasp the value; we transform the ordinary valve and install a flow control valve in the valve. There is a round hole of Φ1.5mm drilled on the valve, and the gas discharge is limited through the round hole, so that the pressure can be slowly, Accurately put to the specified value.

(2) To achieve the recyclable function of SF6 gas, the key part is the recovery system, which includes two parts, the high-pressure gas pump and the recovery cylinder. The function of the high-pressure air pump is to press the SF6 gas in the trachea into the recovery cylinder for storage, and its working pressure reaches 0.6Mpa; when the signal transmission is completed, turn on the power switch in the middle to make the high-pressure air pump run and discharge the gas in the pipeline ;The function of recycling steel cylinders is to effectively store a certain amount of SF6 gas; when it is necessary to discharge the gas in the pipeline, first open the gas flow control valve, press the SF6 gas into the steel cylinder when the pressure pump is running, and then close the gas flow control valve to complete Recycling work; the pressure gauge is used to monitor the gas pressure in the cylinder. When the pressure in the cylinder is too high, the gas in the cylinder can be discharged into a large-capacity container through a self-sealing joint.

The invention shortens the working time from the original 10 minutes to 2 minutes. Since the amount of SF6 gas discharged can be controlled, the discharge volume is greatly reduced, and the signal transmission operation is completed once, which is fast and accurate, and greatly improves the maintenance work efficiency. ;After the signal transmission is completed, turn on the high-pressure air pump to recover the gas, and use the SF6 gas leak detector to test at the work site, and there is no residual gas; The problems of hazards and environmental pollution have all been resolved. The following table is the effect comparison table before and after use:

It can be seen from the above table that the application of SF6 gas recyclable degassing device has improved the efficiency of on-site work, greatly reduced safety risks, and also played a good role in protecting the environment.

Claims (2)

1. A recyclable SF6 gas deflation device, characterized in that it includes a gas recovery bottle (1), a high-pressure air pump (3) connected to the gas recovery bottle (1) through a first high-density plastic tube (2) And the gas flow control valve (9) connected with the high-pressure air pump (3) through the second high-density plastic tube (8), the top of the gas recovery bottle (1) is provided with a self-sealing joint (1-1), and the front end is provided with a The pressure gauge (1-2), the rear end is provided with a connecting plug-in (1-3), and the side end is provided with a gas cylinder valve (1-4) connected to the first high-density plastic pipe (2), and the high-pressure air pump (3) The air inlet end and the air outlet end are respectively connected with the second high-density plastic pipe (8) and the first high-density plastic pipe (2). The upper end of the high-pressure air pump (3) is provided with a handle (6), The lower end is provided with a storage battery (4) for driving its work, the front end of the storage battery (4) is provided with a switch button (5), and the rear end is provided with a connection slot compatible with the connection plug-in (1-3) (7), the high-pressure air pump (3) is provided with a storage room for storing the second high-density plastic pipe (8), and the end of the gas flow control valve (9) is provided with a joint conversion device (7) . 2. The recyclable SF6 gas deflation device according to claim 1, characterized in that the model of the high-pressure air pump (3) is RB-400A.