On-line monitoring and control device for sulfur hexafluoride gas filled in circuit breaker

Abstract

The utility model relates to an on-line detection and control device, in particular to an on-line detection and control device for sulfur hexafluoride gas filled in a circuit breaker, which comprises an on-line monitoring and control gas filling pipeline and a vacuum control pipeline, an air inlet, an evaporator, a pressure regulating valve, a digital display pressure gauge, a first electromagnetic valve, a flow meter, a regulating valve, a pressure transmitter and a filling interface are sequentially arranged on the on-line monitoring and control inflation pipeline from the air inlet end to the air outlet end, and a second electromagnetic valve and a vacuum transmitter are sequentially arranged on the vacuum control pipeline from bottom to top. The vacuum control pipeline between the second electromagnetic valve and the vacuum transmitter is connected with a vacuum pump, and the vacuum control pipeline between the second electromagnetic valve and the vacuum transmitter is connected with a vacuum pump. By adopting the technical scheme, the on-line monitoring and control device for the sulfur hexafluoride gas filled in the circuit breaker ensures the purity of the sulfur hexafluoride gas in the pipeline; the filling amount of the sulfur hexafluoride gas can be accurately metered, and the pressure can be automatically maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to online detection and control device, especially involves circuit breaker fills six fluorine sulfur gas online detection and control device. BACKGROUND

[0002] Six fluorine sulfur gas is both used as insulating medium and arc extinguishing medium in circuit breaker. Its excellent insulating performance and arc extinguishing characteristics make six fluorine sulfur gas be widely used in circuit breaker.

[0003] The existing circuit breaker fills six fluorine sulfur gas, mainly relies on manual according to the value of density relay on the circuit breaker to judge whether filling meets the requirement, and this mode has the following shortcomings:

[0004] 1, cannot accurately measure the six fluorine sulfur gas filled in the circuit breaker, can only calculate through pressure, volume, temperature and other parameters, 2, the pressure maintenance after filling needs manual to judge, cannot accurately judge whether the circuit breaker exists leakage. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above insufficient, provides a device that can accurately measure six fluorine sulfur gas filling amount and automatic pressure maintenance and judge.

[0006] The utility model aims at the above insufficient, provides a device that can accurately measure six fluorine sulfur gas filling amount and automatic pressure maintenance and judge.

[0007] A circuit breaker fills six fluorine sulfur gas online monitoring and control device, including vacuum control pipeline and online monitoring and control inflation pipeline, the online monitoring and control inflation pipeline is sequentially provided with inlet, evaporator, pressure regulating valve, pressure gauge, first solenoid valve, flowmeter, regulating valve, pressure transmitter and filling interface from the gas inlet end to the gas outlet end, the filling interface is connected with the circuit breaker, the lower end of the vacuum control pipeline is connected on the online monitoring and control inflation pipeline between the first solenoid valve 7 and the flowmeter, the vacuum control pipeline is sequentially provided with second solenoid valve and vacuum transmitter from bottom to top, and the vacuum control pipeline between the second solenoid valve 8 and vacuum transmitter is connected with vacuum pump.

[0008] The circuit breaker fills six fluorine sulfur gas online monitoring and control device adopting the above technical scheme guarantees the vacuum degree of pipeline when filling six fluorine sulfur gas into circuit breaker, thereby guaranteeing that other impurity air does not exist in the pipeline, guaranteeing the purity of six fluorine sulfur gas in the pipeline, in addition, since pressure gauge, flowmeter and regulating valve are used, six fluorine sulfur gas filling amount can be accurately measured and automatic pressure maintenance can be carried out.

[0009] Further limited, the evaporator is provided with a heater and a temperature transmitter. The internal heater and temperature transmitter can better guarantee the function of the evaporator.

[0010] Further limited, the pressure gauge is a digital pressure gauge, which can more intuitively display the pressure of the charged sulfur hexafluoride gas.

[0011] Similarly, the regulating valve is an electric regulating valve, which can more accurately and automatically control the adjustment.

[0012] The circuit breaker sulfur hexafluoride gas online detection and control device adopts the technical scheme, mainly comprises a vacuum pump, an electromagnetic valve, a pressure transmitter, a temperature transmitter, an evaporator, a pressure regulating valve, a digital pressure gauge, a flowmeter, an electric regulating valve and a control system.

[0013] 1. The device body is vacuumized: the vacuum pump, the electromagnetic valve and the electric regulating valve are opened, the device body pipeline is vacuumized, the vacuum transmitter is installed on the vacuum pipeline to detect the vacuum degree of the device body pipeline and form a signal transmission to the control system to control the vacuum pump and the electromagnetic valve. When the vacuum degree reaches the set value, the vacuum pump and the electromagnetic valve are closed.

[0014] 2. Sulfur hexafluoride gas filling: the heater in the evaporator and the electromagnetic valve are opened, the sulfur hexafluoride gas enters the evaporator from the interface, the heater in the evaporator completely gasifies the sulfur hexafluoride, the completely gasified sulfur hexafluoride gas is adjusted in pressure by the pressure regulating valve, then passes through the first electromagnetic valve, is accurately measured by the flowmeter, and then is filled into the circuit breaker through the electric regulating valve and the interface. The pressure transmitter, the temperature transmitter and the digital pressure gauge are installed on the filling pipeline to detect the pressure value and the temperature value of the sulfur hexafluoride gas in the whole pipeline and form a signal transmission to the control system to control the heater and the electromagnetic valve. The value calculated by the flowmeter is directly displayed.

[0015] 3. Pressure maintaining: after filling is completed, the pressure transmitter automatically reads the pressure value of the circuit breaker, then maintains the pressure for a period of time, reads the pressure value again, and judges whether there is leakage by the difference between the two pressure values.

[0016] The circuit breaker sulfur hexafluoride gas online detection and control device has the abilities of automatic filling and automatic pressure maintaining determination. Schematic view of the process of the circuit breaker sulfur hexafluoride gas online detection and control device.

[0017] Figure 1 The process flow diagram of the circuit breaker sulfur hexafluoride gas online detection and control device. Specific implementation

[0018] The circuit breaker sulfur hexafluoride gas online detection and control device will be further described below. Figure 1

[0019] ​The application discloses a kind of circuit breaker fills hexafluoride sulfur gas on-line monitoring and control device, including vacuum control pipeline and on-line monitoring and control filling pipeline, the on-line monitoring and control filling pipeline is sequentially provided with inlet 1 from gas inlet end to gas outlet end, evaporator 14, pressure regulating valve 4, digital pressure gauge 5, first electromagnetic valve 7, flowmeter 10, electric regulating valve 11, pressure transmitter 12 and filling interface 13, the evaporator 14 is equipped with heater 3 and temperature transmitter 2, and the filling interface 13 is communicated with the circuit breaker;The lower end of the vacuum control pipeline is connected on the on-line monitoring and control filling pipeline between the first electromagnetic valve 7 and the flowmeter 10, and the vacuum control pipeline is sequentially provided with second electromagnetic valve 8 and vacuum transmitter 9 from bottom to top, and the vacuum control pipeline between the second electromagnetic valve 8 and the vacuum transmitter 9 is connected with vacuum pump 6.

[0020] The circuit breaker filled with hexafluoride sulfur gas on-line detection and control device adopts the technical scheme, mainly includes vacuum pump, electromagnetic valve, pressure transmitter, temperature transmitter, evaporator, pressure regulating valve, digital pressure gauge, flowmeter, electric regulating valve, control system and the like, and filling is completed in three steps.

[0021] 1, the device body is vacuumized: vacuum pump, electromagnetic valve and electric regulating valve are opened, and the device body pipeline is vacuumized, vacuum transmitter is installed on the vacuum pipeline to detect the vacuum degree of the device body pipeline and form signal transmission to the control system to control the vacuum pump and electromagnetic valve. After the vacuum degree reaches the set value, the vacuum pump and electromagnetic valve are closed.

[0022] 2, hexafluoride sulfur gas filling: the heater in the evaporator, electromagnetic valve are opened, hexafluoride sulfur gas enters the evaporator from the interface, the heater in the evaporator completely gasifies hexafluoride sulfur, the completely gasified hexafluoride sulfur gas is pressure-regulated through the pressure regulating valve, and then accurately measured through the flowmeter after passing through the first electromagnetic valve, and then filled into the circuit breaker through the electric regulating valve and the interface. Pressure transmitter, temperature transmitter, digital pressure gauge are installed on the filling pipeline to detect the pressure value and temperature value of hexafluoride sulfur gas in the whole pipeline and form signal transmission to the control system to control the heater and electromagnetic valve. The value calculated by the flowmeter is directly displayed.

[0023] 3, pressure maintaining: after filling is completed, the pressure transmitter automatically reads the pressure value of the circuit breaker, then maintains pressure for a period of time, reads the pressure value again, and judges whether there is leakage through the difference between the two pressure values.

[0024] The utility model discloses the above-mentioned technical scheme, has the ability of automatic filling, automatic pressure maintaining determination.

[0025] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and a modification without creative contribution can be made to the embodiment according to needs by a person skilled in the art after reading the specification, but as long as the modification is within the scope of the claims of the utility model, the utility model is protected by the patent law.

Claims

1. Circuit breaker filled with sulfur hexafluoride gas on-line monitoring and control device, characterized in that: The application relates to an on-line monitoring and control inflation pipeline and a vacuum control pipeline, wherein the on-line monitoring and control inflation pipeline is sequentially provided with an air inlet, an evaporator, a pressure regulating valve, a digital pressure gauge, a first electromagnetic valve, a flowmeter, an adjusting valve, a pressure transmitter and a filling interface from an air inlet end to an air outlet end; the filling interface is communicated with the circuit breaker; the lower end of the vacuum control pipeline is connected to the on-line monitoring and control inflation pipeline between the first electromagnetic valve and the flowmeter; the vacuum control pipeline is sequentially provided with a second electromagnetic valve and a vacuum transmitter from bottom to top; and the vacuum control pipeline between the second electromagnetic valve and the vacuum transmitter is connected with a vacuum pump.

2. The circuit breaker SF6 gas filling on-line monitoring and control device according to claim 1, characterized in that: The evaporator is internally provided with a heater and a temperature transmitter.

3. The circuit breaker SF6 gas on-line monitoring and control device of claim 1, wherein: The digital pressure gauge is a digital pressure gauge.

4. The circuit breaker SF6 gas on-line monitoring and control device of claim 1, wherein: The adjusting valve is an electric adjusting valve.

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