Mixed gas supplementing device

Abstract

The utility model provides a mixed gas supplementing device. The mixed gas supplementing device comprises a control mainboard, a vacuum pump, an electromagnetic valve, a temperature sensor, a filter, a first pressure transmitter, a second pressure transmitter, a pressure stabilizing valve, a mass flow meter, a mixing ratio detection device, a status lamp, an RS485 interface, an SF6 gas inlet, an N2 gas inlet, an exhaust port and a gas charging port, the SF6 gas inlet is connected with an SF6 steel cylinder, and the N2 gas inlet is connected with an N2 steel cylinder; the SF6 gas inlet and the N2 gas inlet are both connected with the first pressure transmitter, the first pressure transmitter is further connected with one end of a pressure stabilizing valve, and the other end of the pressure stabilizing valve is connected with the filter; the air inlet end of the mixing ratio detection device is connected with the pressure stabilizing valve, and the air outlet end of the mixing ratio detection device is connected with the exhaust port; a temperature sensor and a second pressure transmitter are sequentially connected between the filter and the GIS mixed gas chamber.

Description

TECHNICAL FIELD

[0001] The utility model relates to mixed gas equipment technical field especially a mixed gas air supplement device. BACKGROUND

[0002] In order to expand the application of mixed gas equipment, effectively reduce the use and discharge of SF6 gas, the country begins to gradually popularize the use of existing GIS mixed gas transformation and newly operated substation mixed gas, and the mixed gas chamber occupancy will increase significantly. Therefore, with the operation of such mixed gas equipment, a new type of intelligent mixed gas portable air supplement device is needed for subsequent operation and maintenance. The above-mentioned device can realize the function of portable air supplement. UTILITY MODEL CONTENT

[0003] Therefore, the utility model discloses a mixed gas air supplement device, which provides a mixed gas portable intelligent air supplement device for portable air supplement.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a mixed gas air supplement device, including control mainboard, vacuum pump, electromagnetic valve, temperature sensor, filter, first pressure transmitter, second pressure transmitter, pressure stabilizing valve, mass flowmeter, mixed ratio detection device, state lamp, RS485 interface, SF6 gas inlet, N2 gas inlet, exhaust port and air inlet, SF6 gas inlet connects SF6 steel bottle, N2 gas inlet connects N2 steel bottle, SF6 gas inlet and N2 gas inlet are connected first pressure transmitter, one end of pressure stabilizing valve is connected to first pressure transmitter, the other end of pressure stabilizing valve is connected to filter, the gas inlet end of mixed ratio detection device is connected to pressure stabilizing valve, and the gas outlet end of mixed ratio detection device is connected to exhaust port, temperature sensor and second pressure transmitter are sequentially connected between filter and GIS mixed gas chamber.

[0005] In a preferred embodiment, the vacuum pump is further connected between the pressure stabilizing valve and the mixed ratio detection device.

[0006] In a preferred embodiment, the state lamp is connected to the control mainboard.

[0007] In a preferred embodiment, the RS485 interface is used for connecting host computer.

[0008] In a preferred embodiment, the liquid crystal touch screen is further connected to the control mainboard.

[0009] In a preferred embodiment, a first valve is arranged between the N2 gas inlet and the first pressure transmitter.

[0010] In a preferred embodiment, a second valve is arranged between the SF6 inlet and the first pressure transmitter.

[0011] In a preferred embodiment, a third valve is arranged between the pressure stabilizing valve and the vacuum pump and the mixing ratio detection device.

[0012] In a preferred embodiment, a fourth valve is arranged between the filter and the temperature sensor.

[0013] In a preferred embodiment, a sixth valve is arranged between the vacuum pump and the pressure stabilizing valve.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Effective volume test: according to the ideal gas equation (PV=nRT), the gas in the SF6 equipment container is discharged through the mass flow controller to control the flow, and the volume of the container is calculated by accumulating the discharged amount and the pressure change amount in the container, so that the volume of the SF6 equipment is known, and the equipment gas supplement amount is calculated.

[0016] 2. Mixing ratio detection: the built-in high-precision mixing ratio detection sensor mixes the mixed gas in the gas chamber

[0017] 3. Intelligent control: intelligent control technology, through pressure, temperature sensor, high-precision mass controller to control flow, temperature, pressure monitoring, realizes automatic detection, automatic accurate inflation and automatic alarm functions.

[0018] 4. Portable: through compact structure design, modular design, reduces the volume and weight of the device, makes it more easily carried.

[0019] 5. Efficient inflation technology: one-key inflation is realized, manual operation is reduced, work efficiency and safety are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the structure schematic view of preferred embodiment of the utility model;

[0021] Fig. 2 It is the electrical connection schematic view of preferred embodiment of the utility model. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and examples.

[0023] It should be pointed out that the following detailed description is exemplary, and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0024] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0025] A mixed gas supplement device, referring to Figs. 1-2 , comprising a control mainboard 1, a vacuum pump 2, a solenoid valve 3, a temperature sensor 4, a filter 5, a first pressure transmitter 6, a second pressure transmitter 7, a pressure stabilizing valve 8, a mass flow meter 11, a mixing ratio detection device 12, a state light 15, an RS485 interface 14, an SF6 gas inlet 16, an N2 gas inlet 18, an exhaust port 19 and a gas filling port 20; the SF6 gas inlet 16 is connected to an SF6 cylinder 700, and the N2 gas inlet 18 is connected to an N2 cylinder 800; the SF6 gas inlet 16 and the N2 gas inlet 18 are both connected to the first pressure transmitter 6, one end of the first pressure transmitter 6 is further connected to the pressure stabilizing valve 8, and the other end of the pressure stabilizing valve 8 is connected to the filter 5; the gas inlet end of the mixing ratio detection device 12 is connected to the pressure stabilizing valve 8, and the gas outlet end of the mixing ratio detection device 12 is connected to the exhaust port 19; the filter 5 and the GIS mixed gas chamber 900 are further connected in sequence with the temperature sensor 4 and the second pressure transmitter 7. The vacuum pump 2 is further connected between the pressure stabilizing valve 8 and the mixing ratio detection device 12. The state light 15 is connected to the control mainboard 1. The RS485 interface 14 is used for connecting a host computer. It further comprises a liquid crystal touch screen 17, which is connected to the control mainboard 1. A first valve 100 is arranged between the N2 gas inlet 18 and the first pressure transmitter 6. A second valve 200 is arranged between the SF6 gas inlet 16 and the first pressure transmitter 6. A third valve 300 is arranged between the pressure stabilizing valve 8 and the vacuum pump 2 and the mixing ratio detection device 12. A fourth valve 400 is arranged between the filter 5 and the temperature sensor 4. A sixth valve 600 is arranged between the vacuum pump 2 and the pressure stabilizing valve 8. It further comprises a fifth valve 500, which is connected in sequence with the third valve 300, the fifth valve 500 and the mixing ratio detection device 12. It further comprises a power supply 9 and a battery 10 for supplying power to each component.

[0026] By using the device, the set gas mixing ratio and pressure can be directly reached in one step. The device can automatically calculate the supplement ratio parameters according to the gas parameters in the mixed gas chamber, automatically adjust the gas ratio, and ensure the accuracy of the mixed ratio in the mixed gas electrical equipment.

[0027] Specifically:

[0028] 1. Adopt 7-inch color liquid crystal touch screen 17, intelligent design, simple and convenient operation, adopt humanized automatic process control, convenient operation, real-time display of gas chamber state and charging state, with Internet of Things function;

[0029] 2. Built-in SF6, SF6 / N2 pressure-temperature characteristic curve;

[0030] 3. Built-in SF6 mixed gas mixing ratio detection, with gas mixing ratio detection function and display detection result; Accurate measurement and display of gas chamber volume, total gas volume, charging / gas volume and other information; Large flow high precision mass flowmeter, intelligent fuzzy control algorithm realizes fast gas charging of mixed gas;

[0031] 4. According to the gas parameters in the GIS gas chamber, the required gas charging parameters are automatically calculated, the gas mixing ratio is automatically calculated, the mixed gas equipment mixing ratio accuracy is ensured, and the charging pressure can be set;

[0032] 5. One-key start is realized by setting button, accurate charging, one-step direct

[0033] 6. Built-in fine gas filter, ensure gas clean;

[0034] 7. Internal pipeline constant temperature heating function, cylinder heating function;

[0035] Integrated automatic design and compact multifunctional structure volume facilitate use.

[0036] The following is the technical parameter introduction of the utility model:

[0037]

[0038]

[0039] ① Power socket switch: control the opening and closing of AC 220V power input;

[0040] ② Power socket: AC 220V power input;

[0041] ③ 24V output: used for providing heating source for external equipment or pipeline and other objects needing heating (reserved);

[0042] ④ PT100 interface: temperature signal acquisition when heating external equipment or pipeline and other objects needing heating (reserved);

[0043] ⑤ USB: instrument software upgrade port;

[0044] ⑥ Status light: working status light; flicker to prompt normal operation of the device; (reserved)

[0045] ⑦Undervoltage lamp: undervoltage lamp, prompt should be charged in time (instrument has built-in lithium battery)

[0046] ⑧Charging lamp: charging indication, charging process indication lamp is red, the indication lamp is green when sufficient; (instrument has built-in lithium battery)

[0047] ⑨RS485: for connecting computer, can be with host computer software data upload; (reserved)

[0048] ⑩Power switch: instrument power switch (power on or off), power on power switch indicator light;

[0049] Touch liquid crystal screen: set display and touch as a whole, display, execute corresponding operation function;

[0050] SF6 input: this mouth connects SF6 gas cylinder;

[0051] N2 input: this mouth connects N2 gas cylinder;

[0052] Tail gas discharge: this is the discharge port of tail gas after detection, can be connected with gas guide pipe to flow into gas bag or lead to the low-lying place of downwind side after detection;

[0053] Device interface: through the gas guide pipe and electrical equipment connection.

[0054] The following is the use method of the utility model:

[0055] Preparation and matters needing attention:

[0056] Check whether the gas output of the cylinder is connected to the pressure reducing valve and is not leaking.

[0057] Check whether the source gas (standard gas) is correctly connected to each channel and is not leaking.

[0058] Check whether the cylinder source gas pressure and the gas pressure after pressure reduction and input to the gas supplementing device meet the pressure limit requirements.

[0059] When the device is shut down or disabled, it must be ensured that the "pressure relief" operation is performed in the "intelligent gas supplementing", and the gas source pipeline at each channel inlet must be unloaded, to avoid damage or affect the measurement accuracy of the internal sensor under long-term pressure without power supply.

[0060] Instrument pipeline connection uses quick connector with spring ring, when disconnecting the gas path, the peripheral ring of the quick connector must be pressed tightly, so that the gas pipe can be easily pulled out, otherwise it is easy to damage the quick connector and cause gas leakage.

[0061] After the gas supplement is finished, the mixed gas equipment should be checked for leakage to confirm no leakage.

[0062] After 24 hours from the end of the gas supplement operation, the mixed ratio, humidity and other items of the mixed gas in the mixed gas equipment should be detected. The deviation of the mixed ratio of the mixed gas from the rated gas mixed ratio of the mixed gas equipment should not be more than ±1.0%, the oxygen content should not be more than 0.5%, and the gas humidity, oxygen content and other items should meet the operation technical requirements of the mixed gas insulation equipment. If the requirements are not met, the treatment should be carried out until the requirements are met.

[0063] Operation method:

[0064]

[0065]

Claims

1. A mixed gas supply device characterized by comprising: The control mainboard, vacuum pump, electromagnetic valve, temperature sensor, filter, first pressure transmitter, second pressure transmitter, pressure stabilizing valve, mass flow meter, mixing ratio detection device, state light, RS485 interface, SF6 gas inlet, N2 gas inlet, gas outlet and gas filling port are included; the SF6 gas inlet is connected with SF6 cylinder, and the N2 gas inlet is connected with N2 cylinder; the SF6 gas inlet and N2 gas inlet are both connected with the first pressure transmitter, one end of the first pressure transmitter is also connected with the pressure stabilizing valve, and the other end of the pressure stabilizing valve is connected with the filter; the gas inlet end of the mixing ratio detection device is connected with the pressure stabilizing valve, and the gas outlet end of the mixing ratio detection device is connected with the gas outlet; the filter and GIS mixed gas chamber are further connected with the temperature sensor and second pressure transmitter in sequence.

2. The mixed gas supply apparatus according to claim 1, wherein The vacuum pump is further connected between the pressure stabilizing valve and the mixing ratio detection device.

3. The mixed gas supply apparatus according to claim 1, wherein The state light is connected with the control mainboard.

4. The mixed gas supply apparatus according to claim 1, wherein The RS485 interface is used for connecting the host computer.

5. The mixed gas make-up device of claim 1, wherein The liquid crystal touch screen is further included, and the liquid crystal touch screen is connected with the control mainboard.

6. The mixed gas supply apparatus according to claim 1, wherein A first valve is arranged between the N2 gas inlet and the first pressure transmitter.

7. The mixed gas supply apparatus according to claim 1, wherein A second valve is arranged between the SF6 gas inlet and the first pressure transmitter.

8. The mixed gas supply apparatus according to claim 1, wherein A third valve is arranged between the pressure stabilizing valve, vacuum pump and mixing ratio detection device.

9. The hybrid gas makeup device of claim 1, wherein A fourth valve is arranged between the filter and temperature sensor.

10. The mixed gas make-up device of claim 1, wherein A sixth valve is arranged between the vacuum pump and pressure stabilizing valve.

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