CN115854264A - SF 6 Inflation recovery metering device - Google Patents

Abstract

SF ₆ The inflation recovery metering device comprises an inflation/recovery main pipe, a first recovery branch pipe and a second recovery branch pipe; one end of the main inflation/recovery pipe is an inflation port/recovery port, the other end of the main inflation/recovery pipe is an equipment connecting port, and the main inflation/recovery pipe is provided with a first electromagnetic valve, a mass flow meter, a third electromagnetic valve and a digital display pressure gauge; one end of the first recovery branch pipe is also communicated with an air inlet of the mass flowmeter, the other end of the first recovery branch pipe is also communicated with an equipment connector, and a second electromagnetic valve is connected to the first recovery branch pipe in series; one end of the second recovery branch pipe is also communicated with the air outlet of the mass flow meter, the other end of the second recovery branch pipe is also communicated with the inflating port/recovery port, and a fourth electromagnetic valve is connected in series on the second recovery branch pipe. The invention can realize SF ₆ Gas recovery metering and charge metering.

Description

SF6 gas recovery metering device

technical field

The invention belongs to the technical field of electric equipment maintenance, and relates to an SF ₆ charging recovery metering device.

Background technique

SF ₆ gas is the six main greenhouse gases that are strictly prohibited to be emitted, and is widely used in the power industry for electrical insulation of equipment. The SF ₆ gas charged in _the electrical equipment needs to be recovered after the electrical equipment is decommissioned or the equipment is disassembled. Now the country requires power grid companies to count the recovery rate, record the recovered SF ₆ gas weight and calculate the recovery rate of the equipment during the recovery process; newly put into operation electrical equipment needs to be filled with SF ₆ gas, and the weight of SF ₆ gas charged each time can be recorded . The invention can not only complete the recovery metering of SF ₆ gas and the measurement of the recovery rate, but also can complete the supplementary gas metering.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a SF ₆ charging recovery metering device, which can realize the recovery metering and filling metering of SF ₆ gas.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme, the SF ₆ inflation recovery metering device, including the inflation/recovery main pipe, the first recovery branch pipe, the second recovery branch pipe and a digital display pressure gauge;

One end of the inflation/recovery main pipe is the inflation port/recovery port, and the other end of the inflation/recovery main pipe is the equipment connection port. The first solenoid valve, mass flow rate Gauge, third solenoid valve, digital display pressure gauge;

One end of the first recovery branch pipe is also connected to the air inlet of the mass flowmeter, and the other end of the first recovery branch pipe is also connected to the equipment connection port, and the second solenoid valve is connected in series on the first recovery branch pipe;

One end of the second recovery branch pipe is also connected to the gas outlet of the mass flow meter, and the other end of the second recovery branch pipe is also connected to the charging port/recovery port, and the fourth solenoid valve is connected in series on the second recovery branch pipe.

Further, the inflation port/recovery port is connected to the inflation/recovery interface or joint.

Further, the device connection port is connected to the device connection connector.

Further, the digital display pressure gauge is placed near the equipment connection port or the digital display pressure gauge is set at the air chamber sampling port.

Further, the digital display pressure gauge adopts a high precision digital display pressure gauge.

Fill gas metering. The gas filling port/recovery port is connected to the SF ₆ gas cylinder or gas storage tank or gas replenishing device, open the first solenoid valve and the third solenoid valve, close the second solenoid valve and the fourth solenoid valve, and the SF ₆ gas passes through the first solenoid valve , mass flowmeter, third solenoid valve, high-precision digital display pressure gauge and equipment connection port are charged into the electrical equipment, and the mass flowmeter can measure the weight of SF ₆ gas flowing through. The high-precision digital display pressure gauge can detect the inflation pressure. When the inflation reaches the target pressure value, the first solenoid valve is closed to complete automatic inflation, and the weight of SF ₆ gas charged in the gas chamber is recorded.

During the gas filling process, the mass flow meter can more accurately obtain the gas mass flow data (gas flow rate under standard conditions), and then calculate the gas mass during the gas filling process according to the gas density and gas filling time, and then obtain each The gas weight for the secondary refill job. In this way, the measurement and accumulation of sulfur hexafluoride gas consumption on site can be realized.

Recovery measurement and recovery rate determination. The charging port/recovery port is connected to the SF ₆ recovery device, close the first solenoid valve and the third solenoid valve, open the second solenoid valve and the fourth solenoid valve, and connect the equipment connection port to the gas chamber of the SF ₆ electrical equipment to be recovered, with high-precision digital display The pressure gauge records the initial pressure of recovery, starts the SF ₆ recovery device, and the recovered SF ₆ gas is recovered through the second solenoid valve, mass flow meter, and the fourth solenoid valve. During the recovery process, the mass flow meter records the weight of the recovered SF ₆ gas, After the recovery is stopped, the high-precision digital display pressure gauge records the recovery termination pressure. Calculation of the recovery is done based on the starting pressure and ending pressure.

Based on Dalton's law of partial pressure and the law of energy conservation, recovery rate%=100*(initial pressure-end pressure)/initial pressure, the initial pressure and end pressure of recovery can be obtained by digital display pressure gauge.

In the same way as supplementary gas, during the recovery process, the mass flow meter can more accurately obtain the gas mass flow data (gas flow rate under standard conditions), and then calculate the gas mass during the gas recovery process according to the gas density and recovery time, and obtain each The gas weight for the recovery operation. So as to realize the measurement and accumulation of sulfur hexafluoride gas recovery on site.

The invention can not only complete the recovery metering of SF ₆ gas and the measurement of the recovery rate, but also can complete the supplementary gas metering.

Description of drawings

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

In Fig. 1, the inflation/recovery main pipe 1, the first recovery branch pipe 2, the second recovery branch pipe 3, the inflation port/recovery port 4, the equipment connection port 5, the mass flow meter 6, and the digital display pressure gauge 7.

Detailed ways

As shown in Figure 1, the SF ₆ inflation recovery metering device includes an inflation/recovery main pipe 1, a first recovery branch pipe 2, a second recovery branch pipe 3 and a digital display pressure gauge 7;

One end of the inflation/recovery main pipe 1 is the inflation port/recovery port 4, the other end of the inflation/recovery main pipe is the equipment connection port 5, and the inflation/recovery main pipe 1 is provided with the first A solenoid valve V1, a mass flow meter 6, and a third solenoid valve V3;

The digital display pressure gauge 7 is set on the inflation/recovery main pipe 1 between the third solenoid valve V3 and the equipment connection port 5, or the digital display pressure gauge 7 is set at the air chamber sampling port;

One end of the first recovery branch pipe 2 is also connected to the air inlet of the mass flow meter 6, and the other end of the first recovery branch pipe 2 is also connected to the equipment connection port 5, and the second solenoid valve V2 is connected in series on the first recovery branch pipe 2;

One end of the second recovery branch pipe 3 is also connected to the gas outlet of the mass flow meter 6, and the other end of the second recovery branch pipe 3 is also connected to the gas charging port/recovery port 4, and the fourth solenoid valve V4 is connected in series on the second recovery branch pipe 3.

Further, the inflation/recovery port 4 is connected to the inflation/recovery interface or joint.

Further, the device connection port 5 is connected to a device connection joint.

Further, the digital display pressure gauge 7 is close to the equipment connection port 5 .

Further, the digital display pressure gauge 7 adopts a high precision digital display pressure gauge.

Fill gas metering. The charging port/recovery port 4 is connected to the SF ₆ gas cylinder or gas storage tank or gas supplement device, open the first solenoid valve V1 and the third solenoid valve V3, close the second solenoid valve V2 and the fourth solenoid valve V4, and SF ₆ gas The first electromagnetic valve V1, the mass flow meter 6, the third electromagnetic valve V3, the high-precision digital display pressure gauge and the equipment connection port 5 are charged into the electrical equipment, and the mass flow meter 6 can measure the weight of SF ₆ gas flowing through. The high-precision digital display pressure gauge can detect the inflation pressure. When the inflation reaches the target pressure value, close the first solenoid valve V1 to complete the automatic inflation, and record the weight of SF ₆ gas in the gas chamber.

During the gas filling process, the mass flow meter 6 can more accurately obtain the gas mass flow data (gas flow rate under standard conditions), and then calculate the gas mass during the gas filling process according to the gas density and the gas filling time, and then obtain Gas weight per job. In this way, the measurement and accumulation of sulfur hexafluoride gas consumption on site can be realized.

Recovery measurement and recovery rate determination. The charging port/recovery port 4 is connected to the SF ₆ recovery device, the first solenoid valve V1 and the third solenoid valve V3 are closed, the second solenoid valve V2 and the fourth solenoid valve V4 are opened, and the equipment connection port 5 is connected to the SF ₆ electrical equipment to be recovered. room, the high-precision digital display pressure gauge records the initial pressure of recovery, starts the SF ₆ recovery device, and the recovered SF ₆ gas is recovered through the second solenoid valve V2, mass flow meter 6, and fourth solenoid valve V4. During the recovery process, the mass flow rate Gauge 6 records the weight of recovered SF ₆ gas, and after the recovery stops, a high-precision digital display pressure gauge records the recovery termination pressure. Calculation of the recovery is done based on the starting pressure and ending pressure.

Based on Dalton's law of partial pressure and law of energy conservation, recovery rate%=100*(initial pressure-end pressure)/initial pressure, the initial pressure and end pressure of recovery can be obtained through the digital display pressure gauge 7.

In the same way as the supplementary gas, during the recovery process, the mass flow meter 6 can more accurately obtain the gas mass flow data (gas flow rate under standard conditions), and then calculate the gas quality during the gas recovery process according to the gas density and recovery time, and obtain Gas weight per recovery job. So as to realize the measurement and accumulation of sulfur hexafluoride gas recovery on site.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the protection of the technical solution of the present invention. scope.

Claims (5)

1.SF ₆ Aerify and retrieve metering device, retrieve branch pipe (3), digital display manometer (7) and mass flow meter (6), its characterized in that including aerifing/retrieving person in charge (1), first recovery branch pipe (2), second:

one end of the main inflation/recovery pipe (1) is provided with an inflation port/recovery port (4), the other end of the main inflation/recovery pipe is provided with an equipment connecting port (5), and the main inflation/recovery pipe (1) is sequentially provided with a first electromagnetic valve (V1), a mass flow meter (6) and a third electromagnetic valve (V3) from the inflation port/recovery port (4) to the equipment connecting port (5);

the digital display pressure gauge (7) is arranged on the main inflating/recycling pipe (1) between the third electromagnetic valve (V3) and the equipment connecting port (5), or the digital display pressure gauge (7) is arranged at a sampling port of the air chamber;

one end of the first recovery branch pipe (2) is also communicated with an air inlet of the mass flow meter (6), the other end of the first recovery branch pipe (2) is also communicated with an equipment connector (5), and a second electromagnetic valve (V2) is connected to the first recovery branch pipe (2) in series;

one end of the second recovery branch pipe (3) is also communicated with the air outlet of the mass flow meter (6), the other end of the second recovery branch pipe (3) is also communicated with the inflating port/recovery port (4), and the second recovery branch pipe (3) is connected with a fourth electromagnetic valve (V4) in series.

2. SF according to claim 1 ₆ The inflation recovery metering device is characterized in that the inflation inlet/recovery port (4) is connected with an inflation/recovery interface orAnd (4) a joint.

3. SF according to claim 1 ₆ The inflation recycling metering device is characterized in that an equipment connecting port (5) is connected with an equipment connecting joint.

4. SF according to claim 3 ₆ The inflation recovery metering device is characterized in that a digital display pressure gauge (7) is close to the equipment connecting port (5).

5. SF according to claim 3 ₆ The inflation recycling metering device is characterized in that the digital display pressure gauge (7) adopts a high-precision digital display pressure gauge.

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