An uninterruptible SF6 gas replacement and charging device without power outage

Abstract

The present invention relates to the technical field of electrical equipment maintenance, and specifically relates to a device for replacing and charging SF6 gas without interruption and without power outage. It includes a box body, an inflation pipeline, an exhaust pipeline, and a replacement and inflation control system. One-way valves, power valves, pressure reducing and stabilizing valves, gas flow controllers, ball valves and other devices are installed on both the inflation pipeline and the exhaust pipeline. The replacement and inflation control system includes a signal processing module, a signal acquisition module, a prompt module, a display module, an inflation voltage stabilizing module, etc. The signal acquisition module includes a micro weighing sensor, a gas density sensor, a micro water content sensor, etc. Compared with the prior art, the present invention can automatically complete the replacement and charging of SF6 gas in electrical equipment without power outage, simplifies the operation process, improves work efficiency, reduces operation and maintenance costs, and moreover, it does not require manual operation by staff, reduces potential safety hazards and effectively reduces the work intensity of maintenance personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment maintenance, and specifically to a device for replacing and charging SF6 gas without power interruption. Background Art

[0002] The insulation strength of SF6 gas is much higher than that of traditional insulating gases and it has good arc extinguishing performance. Therefore, it is widely used in electrical equipment such as circuit breakers, GIS, etc. With the large-scale use of electrical equipment, it is often necessary to perform operations such as replacing and charging the SF6 gas in the electrical equipment. After the electrical equipment has been used for a certain period of time, the old SF6 gas in the equipment contains a certain amount of moisture, and the storage equipment of SF6 gas may also contain a certain amount of moisture. Therefore, when replacing or supplementing the SF6 gas in the electrical equipment, due to the fact that the moisture pressure outside is much higher than the moisture pressure of the gas in the gas chamber, the outside moisture will reverse infiltrate into the gas chamber, resulting in a decrease in the density of the SF6 gas in the chamber and an increase in the water content at the same time. Once the SF6 gas undergoes a chemical reaction with water or other substances in the gas chamber under the action of an electric arc, corrosive electrolytes such as SF4, S2F2, SO2 and other highly toxic decomposition products are generated, causing the density of the SF6 gas in the gas chamber to be even lower, reducing the insulation performance, and posing a great danger to the safe operation of the electrical equipment and the physical health of the operation and maintenance personnel. Therefore, it is necessary to dehumidify the SF6 gas.

[0003] Currently, to dehumidify the SF6 gas, it is necessary to disassemble the electrical equipment, replace components, and evacuate the air after power outage before replacing and charging the gas. This not only increases the operation and maintenance cost but also reduces the power supply reliability. Moreover, when the capacity of the SF6 gas in the electrical equipment is reduced to a certain extent, it will automatically trip. Once tripped, it will take a large amount of manpower and material resources to restore the normal power supply of the power station, which has a great impact on the regional power system. At the same time, during the process of replacing and charging the gas, since the capacity of the SF6 gas in the electrical equipment cannot be measured accurately in real time and can only be checked manually, the work efficiency is low. Therefore, there is an urgent need for a device for replacing and charging SF6 gas that can replace or supplement the SF6 gas in the electrical equipment without power interruption and continuously, and at the same time can quickly dehumidify the SF6 gas in the equipment and monitor the capacity of the SF6 gas in the equipment in real time. Summary of the Invention

[0004] In view of the above problems, the present invention provides a device for replacing and charging SF6 gas without power interruption and continuously. It is provided with an inflation pipeline, an exhaust pipeline and a control system for replacing and charging gas. Various sensors are used to collect real-time information of the SF6 gas in the electrical equipment, and then the actual values of multiple physical quantities of the SF6 gas are compared with the preset values, and automatic exhaust and inflation are carried out according to the comparison results. That is, by timely replacing the SF6 gas in the electrical equipment, the above problems are effectively solved.

[0005] The technical solution adopted by the present invention:

[0006] An uninterruptible SF6 gas replacement and charging device without power outage, characterized in that: it includes a box body (1) and a replacement and charging control system. A door panel (5) is arranged on the front of the box body (1). The door panel (5) is hinged to the door frame (10) through two upper and lower hinges (6). A control panel (8) is arranged on the door panel (5). A liquid crystal display screen (9) is installed on the control panel (8). An inflation indicator light group (2) is arranged above the control panel (8). An exhaust indicator light group (3) is arranged below the control panel (8). A switch (29) is arranged on the left side of the control panel (8). A door handle (7) is arranged on the right side of the control panel (8). An air pipe (11) is arranged on one side of the box body (1). An air inlet interface (27) and an exhaust interface (28) are arranged on the other side of the box body (1) opposite to the air pipe (11). Two groups of moving wheels (4) are also arranged at the bottom of the box body (1), and each group of moving wheels (4) has two wheels;

[0007] An inflation pipeline (17) and an exhaust pipeline (25) are arranged in the box body (1). The air inlet interface (27) is connected to the inlet of a first one-way valve (12) through the inflation pipeline (17). The outlet of the first one-way valve (12) is connected to the inlet of a first power valve (13) through the inflation pipeline (17). The outlet of the first power valve (13) is connected to the inlet of a first pressure reducing and stabilizing valve (14) through the inflation pipeline (17). The outlet of the first pressure reducing and stabilizing valve (14) is connected to the inlet of a first gas flow controller (15) through the inflation pipeline (17). The outlet of the first gas flow controller (15) is connected to the inlet of a first ball valve (16) through the inflation pipeline (17). The outlet of the first ball valve (16) is connected to the upper port of a three-way valve (26) through the inflation pipeline (17). The middle port of the three-way valve (26) is connected to the air pipe (11). A signal acquisition module (18) is arranged on the air pipe (11). The lower port of the three-way valve (26) is connected to the inlet of a second one-way valve (19) through the exhaust pipeline (25). The outlet of the second one-way valve (19) is connected to the inlet of a second power valve (20) through the exhaust pipeline (25). The outlet of the second power valve (20) is connected to the inlet of a dehumidifier (21) through the exhaust pipeline (25). The outlet of the dehumidifier (21) is connected to the inlet of a second gas flow controller (22) through the exhaust pipeline (25). The outlet of the second gas flow controller (22) is connected to the inlet of a second pressure reducing and stabilizing valve (23) through the exhaust pipeline (25). The outlet of the second pressure reducing and stabilizing valve (23) is connected to the inlet of a second ball valve (24) through the exhaust pipeline (25). The outlet of the second ball valve (24) is connected to the exhaust interface (28) through the exhaust pipeline (25);

[0008] Among them, the first power valve (13) is an intake power valve, the second power valve (20) is an exhaust power valve, the first one-way valve (12) is an intake one-way valve, the second one-way valve (19) is an exhaust one-way valve, the first pressure reducing and stabilizing valve (14) is an intake pressure reducing and stabilizing valve, the second pressure reducing and stabilizing valve (23) is an exhaust pressure reducing and stabilizing valve, the first gas flow controller (15) is an intake gas flow controller, the second gas flow controller (22) is an exhaust gas flow controller, the first ball valve (16) is an intake ball valve, and the second ball valve (24) is an exhaust ball valve.

[0009] The pressure reducing and stabilizing valve serves to keep the air pressure in the inflation pipeline or exhaust pipeline consistent with the SF6 gas pressure in the electrical equipment during the inflation or air exchange process. The gas flow controller serves to regulate the inflation or exhaust rate, improving stability to efficiently and automatically complete the gas replacement and inflation work. The dehumidifier dehumidifies the SF6 gas extracted from the electrical equipment, reducing its water content for convenient recovery and treatment.

[0010] The gas replacement and inflation control system includes a signal acquisition module and a power supply module. The signal output end of the signal acquisition module is connected to the signal input end of the signal processing module. The first signal output end of the signal processing module is connected to the signal input end of the prompt module. The second signal output end of the signal processing module is connected to the signal input end of the display module. The third signal output end of the signal processing module is connected to the signal input end of the inflation pressure stabilizing module. The fourth signal output end of the signal processing module is connected to the signal input end of the exhaust dehumidification module. The first power output end of the power supply module is connected to the power input end of the signal processing module. The second power output end of the power supply module is connected to the power input end of the display module. The third power output end of the power supply module is respectively connected to the power input ends of the signal acquisition module, the inflation pressure stabilizing module, and the exhaust dehumidification module.

[0011] The inflation pressure stabilizing module includes a first one-way valve J1. The control signal input terminal IN of the first one-way valve J1 is connected to the 20th pin D20 of the signal processing module U1. The power supply terminal VCC of the first one-way valve J1 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the first one-way valve J1 is grounded. The 3rd pin D3 of the signal processing module U1 is connected to the positive input terminal V+ of the first power valve M1. The negative input terminal V- of the first power valve M1 is connected to the negative electrode of the power supply V1. The 4th pin D4 of the signal processing module U1 is connected to the power supply terminal VCC of the first pressure reducing and stabilizing valve L1. The grounding terminal GND of the first pressure reducing and stabilizing valve L1 is grounded. The 8th pin D8 of the signal processing module U1 is connected to the signal output terminal OUT of the first gas flow controller B1. The power supply terminal VCC of the first gas flow controller B1 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the first gas flow controller B1 is grounded. The 6th pin D6 of the signal processing module U1 is connected to the signal input terminal IN of the first ball valve H1. The power supply terminal VCC of the first ball valve H1 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the first ball valve H1 is grounded. The 62nd pin A8 of the signal processing module U1 is connected to the signal input terminal IN of the three-way valve C1. The power supply terminal VCC of the three-way valve C1 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the three-way valve C1 is grounded.

[0012] Further, the exhaust and dehumidification module includes a second one-way valve J2. The signal input terminal IN of the second one-way valve J2 is connected to the 11th pin D11 of the signal processing module U1. The power supply terminal VCC of the second one-way valve J2 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the second one-way valve J2 is grounded. The 10th pin D10 of the signal processing module U1 is connected to the positive input terminal V+ of the second power valve M2. The negative input terminal V- of the second power valve M2 is connected to the negative electrode of the power supply V1. The 9th pin D9 of the signal processing module U1 is connected to the power supply terminal VCC of the dehumidifier P1. The grounding terminal GND of the dehumidifier P1 is grounded. The 5th pin D5 of the signal processing module U1 is connected to the signal output terminal OUT of the second gas flow controller B2. The power supply terminal VCC of the second gas flow controller B2 is connected to the positive electrode of the power supply V1 through the switch S

[0013] Further, the prompt module includes an inflation prompt lamp group (2) and an exhaust prompt lamp group (3). The inflation prompt lamp group (2) includes a first light-emitting diode LED1. The anode of the first light-emitting diode LED1 is connected to the 32nd pin D32 of the signal processing module U1. The cathode of the first light-emitting diode LED1 is grounded through a first resistor R1. The 36th pin D36 of the signal processing module U1 is connected to the anode of a second light-emitting diode LED2. The cathode of the second light-emitting diode LED2 is grounded through a second resistor R2. The 40th pin D40 of the signal processing module U1 is connected to the anode of a third light-emitting diode LED3. The cathode of the third light-emitting diode LED3 is grounded through a third resistor R3;

[0014] The exhaust prompt lamp group (3) includes a fourth light-emitting diode LED4. The anode of the fourth light-emitting diode LED4 is connected to the 44th pin D44 of the signal processing module U1. The cathode of the fourth light-emitting diode LED4 is grounded through a fourth resistor R4. The 52nd pin D52 of the signal processing module U1 is connected to the anode of a fifth light-emitting diode LED5. The cathode of the fifth light-emitting diode LED5 is grounded through a fifth resistor R5. The 48th pin D48 of the signal processing module U1 is connected to the anode of a sixth light-emitting diode LED6. The cathode of the sixth light-emitting diode LED6 is grounded through a sixth resistor R6.

[0015] The display module is a liquid crystal display screen G1. The 54th pin A0 of the signal processing module U1 is connected to the first signal terminal P0 of the liquid crystal display screen G1. The 55th pin A1 of the signal processing module U1 is connected to the second signal terminal P1 of the liquid crystal display screen G1. The power supply terminal VCC of the liquid crystal display screen G1 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the liquid crystal display screen G1 is grounded.

[0016] Further, the signal acquisition module includes a micro weighing sensor Q1. The signal output terminal OUT of the micro weighing sensor Q1 is connected to the 53rd pin D53 of the signal processing module U1. The power supply terminal VCC of the micro weighing sensor Q1 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the micro weighing sensor Q1 is grounded. The 24th pin D24 of the signal processing module U1 is connected to the digital signal terminal D1 of the gas density sensor Q2. The analog signal terminal A1 of the gas density sensor Q2 is connected to the 57th pin A3 of the signal processing module U1. The power supply terminal VCC of the gas density sensor Q2 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the gas density sensor Q2 is grounded. The 49th pin D49 of the signal processing module U1 is connected to the output terminal OUT of the gas pressure sensor Q3. The power supply terminal VCC of the gas pressure sensor Q3 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the gas pressure sensor Q3 is grounded. The 59th pin A5 of the signal processing module U1 is connected to the output terminal OUT of the micro water content sensor Q4. The power supply terminal VCC of the micro water content sensor Q4 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the micro water content sensor Q4 is grounded. The power supply terminal VCC of the signal processing module U1 is connected to the positive pole of the power supply V1 through a switch S1. The grounding terminal GND of the signal processing module U1 is grounded. The remaining pins of the signal processing module U1 are left vacant.

[0017] The gas density sensor, gas pressure sensor, and micro water content sensor are responsible for real-time collection of the physical information of SF6 gas in the electrical equipment and transmission to the single-chip microcomputer. The micro weighing sensor is responsible for collecting the weight information of newly filled SF6 gas and transmission to the single-chip microcomputer.

[0018] Further, the switch S1 (29) is a rocker switch.

[0019] Further, the liquid crystal display screen G1 (9) is a capacitive touch screen.

[0020] Further, the moving wheels (4) are moving self-locking wheels.

[0021] The moving self-locking wheels facilitate the movement of this device at any time, so as to carry out the replacement and filling work of SF6 gas in different sites.

[0022] Further, the first light-emitting diode LED1 and the fourth light-emitting diode LED4 are red light-emitting diodes, the second light-emitting diode LED2 and the fifth light-emitting diode LED5 are green light-emitting diodes, and the third light-emitting diode LED3 and the sixth light-emitting diode LED6 are yellow light-emitting diodes.

[0023] Green represents that the device is operating normally, yellow represents that the device is in a paused or standby state, and red represents that the device is in a stopped or faulty state. Among them, the second light-emitting diode LED2 is located in the middle of the inflation indicator light group, the first light-emitting diode LED1 is on its left, and the third light-emitting diode LED3 is on its right. The fifth light-emitting diode LED5 is located in the middle of the exhaust indicator light group, the fourth light-emitting diode LED4 is on its left, and the sixth light-emitting diode LED6 is on its right.

[0024] Further, the signal processing module U1 is a single-chip microcomputer.

[0025] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0026] (1) The present invention relates to a device for replacing and charging SF6 gas without interruption and without power outage. By integrating the inflation pipeline and the exhaust pipeline into one device, various sensors are used to collect the SF6 gas information in the electrical equipment and transmit it to the single-chip microcomputer. After comparing the real-time value with the protection value by the single-chip microcomputer, the exhaust pipeline and the inflation pipeline are automatically opened or closed, so as to achieve the purpose of automatic gas replacement. Compared with the prior art, this device can automatically complete the replacement and charging of SF6 gas in the electrical equipment, realize the automatic detection and adjustment of the pressure and capacity of SF6 gas in the electrical equipment, and no longer requires the electrical equipment to be disassembled after power outage, evacuating the SF6 gas in the electrical equipment and then refilling and supplementing the gas. It greatly simplifies the operation process, improves work efficiency, reduces operation and maintenance costs, and does not require manual operation by staff, reducing potential safety hazards and effectively reducing the work intensity of maintenance personnel, which is beneficial to ensuring the normal power supply operation of the power station. At the same time, it effectively solves the problem of inaccurate inflation pressure during manual gas replacement in the past, realizes power-off-free and controllable inflation pressure, and has a wider application range.

[0027] (2) The present invention relates to a device for replacing and charging SF6 gas without interruption and without power outage. The SF6 gas data and the replacement and charging gas data in the electrical equipment are clearly and accurately displayed through the liquid crystal display screen or the background system. The staff can timely understand the actual situation and remotely control the replacement and charging of gas in real time. By timely replacing and supplementing the gas, the micro water content of SF6 gas in the electrical equipment is reduced, and the dehumidification is timely, thus protecting the sulfur hexafluoride electrical equipment and ensuring stable power supply.

[0028] (3) The present invention is scientifically designed, reasonable in structure, safe and reliable, and convenient to operate. The materials such as electrical equipment, electronic components, and mechanical parts required can be purchased through conventional market channels, and production can be carried out without complex manufacturing processes. Therefore, it has the prospect of large-scale production and popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the examples of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the description of the implementation examples or the prior art. Obviously, the drawings in the following description are only some examples of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Overall schematic diagram of the present invention;

[0031] Figure 2 Schematic diagram of the inflation and ventilation pipelines of the present invention;

[0032] Figure 3 Circuit block diagram of the present invention;

[0033] Figure 4 Circuit diagram of the present invention;

[0034] In the drawings, 1 - box body, 2 - inflation indicator light group, 3 - exhaust indicator light group, 4 - mobile self-locking wheel, 5 - door panel, 6 - hinge, 7 - door handle, 8 - control panel, 9 - liquid crystal display screen, 10 - door frame, 11 - air pipe, 12 - first one-way valve, 13 - first power valve, 14 - first pressure reducing and stabilizing valve, 15 - first gas flow controller, 16 - first ball valve, 17 - inflation pipeline, 18 - signal acquisition module, 19 - second one-way valve, 20 - second power valve, 21 - dehumidifier, 22 - second gas flow controller, 23 - second pressure reducing and stabilizing valve, 24 - second ball valve, 25 - exhaust pipeline, 27 - air inlet interface, 28 - exhaust interface. Embodiment

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. Example

[0036] As Figure 1As shown in the figure, an SF6 gas replacement and charging device that is uninterrupted and does not require power outage includes a box body 1 and a replacement and charging control system. A door panel 5 is provided on the front of the box body 1. The door panel 5 is hinged to a door frame 10 by two upper and lower hinges 6. A control panel 8 is provided on the door panel 5. A liquid crystal display screen 9 is installed on the control panel 8. An inflation indicator light group 2 is provided above the control panel 8. An exhaust indicator light group 3 is provided below the control panel 8. A switch 29 is provided on the left side of the control panel 8. A door handle 7 is provided on the right side of the control panel 8. An air pipe 11 is provided on one side of the box body 1. An air inlet interface 27 and an exhaust interface 28 are provided on the other side of the box body 1 opposite to the air pipe 11. Two sets of movable self-locking wheels 4 are also provided at the bottom of the box body 1, and each set of movable self-locking wheels 4 has two wheels;

[0037] As Figure 2 As shown in the figure, an inflation pipeline 17 and an exhaust pipeline 25 are provided inside the box body 1. The air inlet interface 27 is connected to the inlet of an inlet check valve 12 through the inflation pipeline 17. The outlet of the inlet check valve 12 is connected to the inlet of an inlet power valve 13 through the inflation pipeline 17. The outlet of the inlet power valve 13 is connected to the inlet of an inlet pressure reducing and stabilizing valve 14 through the inflation pipeline 17. The outlet of the inlet pressure reducing and stabilizing valve 14 is connected to the inlet of a gas flow controller 15 for inflation through the inflation pipeline 17. The outlet of the gas flow controller 15 for inflation is connected to the inlet of an inlet ball valve 16 through the inflation pipeline 17. The outlet of the inlet ball valve 16 is connected to the upper port of a three-way valve 26 through the inflation pipeline 17. The middle port of the three-way valve 26 is connected to the air pipe 11. A signal acquisition module 18 is provided on the air pipe 11. The lower port of the three-way valve 26 is connected to the inlet of an exhaust check valve 19 through the exhaust pipeline 25. The outlet of the exhaust check valve 19 is connected to the inlet of an exhaust power valve 20 through the exhaust pipeline 25. The outlet of the exhaust power valve 20 is connected to the inlet of a dehumidifier 21 through the exhaust pipeline 25. The outlet of the dehumidifier 21 is connected to the inlet of a gas flow controller 22 for exhaust through the exhaust pipeline 25. The outlet of the gas flow controller 22 for exhaust is connected to the inlet of an exhaust pressure reducing and stabilizing valve 23 through the exhaust pipeline 25. The outlet of the exhaust pressure reducing and stabilizing valve 23 is connected to the inlet of an exhaust ball valve 24 through the exhaust pipeline 25. The outlet of the exhaust ball valve 24 is connected to the exhaust interface 28 through the exhaust pipeline 25;

[0038] As shown in Fig. 3, the inflation and deflation control system includes a signal acquisition module and a power supply module. The signal output end of the signal acquisition module is connected to the signal input end of the signal processing module. The first signal output end of the signal processing module is connected to the signal input end of the prompt module. The second signal output end of the signal processing module is connected to the signal input end of the display module. The third signal output end of the signal processing module is connected to the signal input end of the inflation pressure stabilizing module. The fourth signal output end of the signal processing module is connected to the signal input end of the exhaust and dehumidification module. The first power output end of the power supply module is connected to the power input end of the signal processing module. The second power output end of the power supply module is connected to the power input end of the display module. The third power output end of the power supply module is respectively connected to the power input ends of the signal acquisition module, the inflation pressure stabilizing module, and the exhaust and dehumidification module.

[0039] As Figure 4 shown, the inflation pressure stabilizing module includes an intake check valve J1. The control signal input end IN of the intake check valve J1 is connected to the 20th pin D20 of the single-chip microcomputer U1. The power supply end VCC of the intake check valve J1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the intake check valve J1 is grounded. The 3rd pin D3 of the single-chip microcomputer U1 is connected to the positive input end V+ of the intake power valve M1. The negative input end V- of the intake power valve M1 is connected to the negative pole of the power supply V1. The 4th pin D4 of the single-chip microcomputer U1 is connected to the power supply end VCC of the intake pressure reducing and stabilizing valve L1. The grounding end GND of the intake pressure reducing and stabilizing valve L1 is grounded. The 8th pin D8 of the single-chip microcomputer U1 is connected to the signal output end OUT of the intake gas flow controller B1. The power supply end VCC of the intake gas flow controller B1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the intake gas flow controller B1 is grounded. The 6th pin D6 of the single-chip microcomputer U1 is connected to the signal input end IN of the intake balloon valve H1. The power supply end VCC of the intake balloon valve H1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the intake balloon valve H1 is grounded. The 62nd pin A8 of the single-chip microcomputer U1 is connected to the signal input end IN of the three-way valve C1. The power supply end VCC of the three-way valve C1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the three-way valve C1 is grounded.

[0040] The exhaust dehumidification module includes an exhaust one-way valve J2. The signal input terminal IN of the exhaust one-way valve J2 is connected to the 11th pin D11 of the single-chip microcomputer U1. The power supply terminal VCC of the exhaust one-way valve J2 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the exhaust one-way valve J2 is grounded. The 10th pin D10 of the single-chip microcomputer U1 is connected to the positive input terminal V+ of the exhaust power valve M2. The negative input terminal V- of the exhaust power valve M2 is connected to the negative electrode of the power supply V1. The 9th pin D9 of the single-chip microcomputer U1 is connected to the power supply terminal VCC of the dehumidifier P1. The grounding terminal GND of the dehumidifier P1 is grounded. The 5th pin D5 of the single-chip microcomputer U1 is connected to the signal output terminal OUT of the exhaust gas flow controller B2. The power supply terminal VCC of the exhaust gas flow controller B2 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the exhaust gas flow controller B2 is grounded. The 7th pin D7 of the single-chip microcomputer U1 is connected to the power supply terminal VCC of the exhaust pressure reducing and stabilizing valve L2. The grounding terminal GND of the exhaust pressure reducing and stabilizing valve L2 is grounded. The 13th pin D13 of the single-chip microcomputer U1 is connected to the signal input terminal IN of the exhaust ball valve H2. The power supply terminal VCC of the exhaust ball valve H2 is connected to the positive electrode of the power supply V1 through the switch S1. The grounding terminal GND of the exhaust ball valve H2 is grounded.

[0041] The prompting module includes an inflation prompting lamp group 2 and an exhaust prompting lamp group 3. The inflation prompting lamp group 2 includes a first light-emitting diode LED1. The anode of the first light-emitting diode LED1 is connected to the 32nd pin D32 of the single-chip microcomputer U1. The cathode of the first light-emitting diode LED1 is grounded through the resistor R1. The 36th pin D36 of the single-chip microcomputer U1 is connected to the anode of the second light-emitting diode LED2. The cathode of the second light-emitting diode LED2 is grounded through the resistor R2. The 40th pin D40 of the single-chip microcomputer U1 is connected to the anode of the third light-emitting diode LED3. The cathode of the third light-emitting diode LED3 is grounded through the resistor R3. The exhaust prompting lamp group 3 includes a fourth light-emitting diode LED4. The anode of the fourth light-emitting diode LED4 is connected to the 44th pin D44 of the single-chip microcomputer U1. The cathode of the fourth light-emitting diode LED4 is grounded through the resistor R4. The 52nd pin D52 of the single-chip microcomputer U1 is connected to the anode of the fifth light-emitting diode LED5. The cathode of the fifth light-emitting diode LED5 is grounded through the resistor R5. The 48th pin D48 of the single-chip microcomputer U1 is connected to the anode of the sixth light-emitting diode LED6. The cathode of the sixth light-emitting diode LED6 is grounded through the resistor R6. The first light-emitting diode LED1 and the fourth light-emitting diode LED4 are red light-emitting diodes. The second light-emitting diode LED2 and the fifth light-emitting diode LED5 are green light-emitting diodes. The third light-emitting diode LED3 and the sixth light-emitting diode LED6 are yellow light-emitting diodes.

[0042] The display module is a liquid crystal display screen G1. The 54th pin A0 of the single-chip microcomputer U1 is connected to the first signal terminal P0 of the liquid crystal display screen G1. The 55th pin A1 of the single-chip microcomputer U1 is connected to the second signal terminal P1 of the liquid crystal display screen G1. The power supply terminal VCC of the liquid crystal display screen G1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the liquid crystal display screen G1 is grounded. The liquid crystal display screen G1 is a capacitive touch screen.

[0043] The signal acquisition module includes a micro weighing sensor Q1. The signal output terminal OUT of the micro weighing sensor Q1 is connected to the 53rd pin D53 of the single-chip microcomputer U1. The power supply terminal VCC of the micro weighing sensor Q1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the micro weighing sensor Q1 is grounded. The 24th pin D24 of the single-chip microcomputer U1 is connected to the digital signal terminal D1 of the gas density sensor Q2. The analog signal terminal A1 of the gas density sensor Q2 is connected to the 57th pin A3 of the single-chip microcomputer U1. The power supply terminal VCC of the gas density sensor Q2 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the gas density sensor Q2 is grounded. The 49th pin D49 of the single-chip microcomputer U1 is connected to the output terminal OUT of the gas pressure sensor Q3. The power supply terminal VCC of the gas pressure sensor Q3 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the gas pressure sensor Q3 is grounded. The 59th pin A5 of the single-chip microcomputer U1 is connected to the output terminal OUT of the micro water content sensor Q4. The power supply terminal VCC of the micro water content sensor Q4 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the micro water content sensor Q4 is grounded. The power supply terminal VCC of the single-chip microcomputer U1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the single-chip microcomputer U1 is grounded. The remaining pins of the single-chip microcomputer U1 are left vacant. The switch S1 is a rocker switch.

[0044] In this embodiment, the DC power supply V1 is a Delipow 18650 lithium battery pack. The models of all one-way valves are H14W-16P, the models of all gas flow controllers are AMC1100, the models of all ball valves are XQ2014, the models of all pressure reducing and stabilizing valves are R21-1 / 4-4P, the model of the intake power valve is kx55015, the model of the exhaust power valve is US(2L)-50, the model of the dehumidifier is GX-SV60, the model of the three-way valve is XQ2014-DN25, the model of the liquid crystal display screen is a 2.8-inch HMI serial port screen, the model of the single-chip microcomputer U1 is an Arduino Mega2560 development board, the model of the micro water content sensor is BWK, the model of the micro weighing sensor is HX711, the model of the gas pressure sensor is PT131, and the model of the gas density sensor is BRW100-1008.

[0045] Working process of the present invention: First, the staff connect the air pipe of this device to the SF6 gas filling port of electrical equipment such as a circuit breaker, then connect the air inlet interface of this device to an external SF6 gas cylinder, and the exhaust interface to an external SF6 gas purification and recovery device. Finally, press the switch and this device can work normally. The gas density sensor, gas pressure sensor, and micro water content sensor installed on the air pipe collect information such as the air pressure, density, and humidity of the SF6 gas in the electrical equipment, and transmit the information data to the single-chip microcomputer. The single-chip microcomputer compares the real-time values of the above physical quantities with the previous protection values. When it is determined that the humidity value and density value are lower than the protection values, the single-chip microcomputer opens devices such as the lower port of the three-way valve, the exhaust check valve, the exhaust power valve, and the exhaust ball valve for ventilation work. At the same time, the discharged SF6 gas is dehumidified by the dehumidifier to reduce its water content for convenient recovery by external equipment. During the ventilation process, when the micro water content sensor detects that the micro water content value of the SF6 gas in the electrical equipment is lower than another preset value, the ventilation ends, and the single-chip microcomputer closes the exhaust channel according to the established program, that is, closes the lower port of the three-way valve and stops the work of devices such as the exhaust power valve and the exhaust ball valve. Then, open the upper port of the three-way valve, the intake check valve, the intake power valve, the intake ball valve and other devices to supplement new SF6 gas to the electrical equipment. When the gas pressure sensor detects that the SF6 gas pressure value in the electrical equipment is the rated maximum pressure value (0.6 Mpa), the single-chip microcomputer closes the filling pipeline to stop filling. After such reciprocating cycles several times, the SF6 gas in the electrical equipment is replaced and filled, so as to achieve the purpose of timely replacing the SF6 gas. During this process, when this device is running normally, there will be a green LED light to indicate normal operation. If there is a failure or other non-operating situation, there will be a red LED light to prompt the staff. At the same time, in addition to seeing the data of gas replacement and filling and the data of SF6 gas in the electrical equipment on the display screen, the staff can also store the IP address of the single-chip microcomputer in the background system. At that time, the staff can view the relevant data of ventilation and filling and manually remotely control gas replacement and filling through the public network. For example, according to the weight of the newly supplemented SF6 gas detected by the micro weighing sensor, it can be estimated how much gas is left in the SF6 gas cylinder, so as to replace the gas cylinder in time. Or if this device automatically supplements gas to the electrical equipment multiple times in a short period of time, check the time interval of gas supplementation. If the time interval of gas supplementation gradually becomes smaller, the staff can estimate the leakage situation of the SF6 gas in the electrical equipment.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the invention.

Claims

1. An SF6 gas replacement and charging device that is uninterrupted and does not require power outage, characterized in that: It includes a box body (1) and an inflation and deflation control system. A door panel (5) is provided on the front of the box body (1). The door panel (5) is hinged to a door frame (10) through upper and lower hinges (6). A control panel (8) is provided on the door panel (5). A liquid crystal display screen G1 (9) is installed on the control panel (8). An inflation warning light group (2) is provided above the control panel (8). An exhaust warning light group (3) is provided below the control panel (8). A switch S1 (29) is provided on the left side of the control panel (8). A door handle (7) is provided on the right side of the control panel (8). An air pipe (11) is provided on one side of the box body (1). An air inlet interface (27) and an exhaust interface (28) are provided on the other side of the box body (1) opposite to the air pipe (11). Two sets of moving wheels (4) are further provided at the bottom of the box body (1), and each set of moving wheels (4) has two wheels; An inflation pipeline (17) and an exhaust pipeline (25) are provided inside the box body (1). The air inlet interface (27) is connected to the inlet of a first one-way valve (12) through the inflation pipeline (17). The outlet of the first one-way valve (12) is connected to the inlet of a first power valve (13) through the inflation pipeline (17). The outlet of the first power valve (13) is connected to the inlet of a first pressure reducing and stabilizing valve (14) through the inflation pipeline (17). The outlet of the first pressure reducing and stabilizing valve (14) is connected to the inlet of a first gas flow controller (15) through the inflation pipeline (17). The outlet of the first gas flow controller (15) is connected to the inlet of a first ball valve (16) through the inflation pipeline (17). The outlet of the first ball valve (16) is connected to the upper port of a three-way valve (26) through the inflation pipeline (17). The middle port of the three-way valve (26) is connected to the air pipe (11). A signal acquisition module (18) is provided on the air pipe (11). The lower port of the three-way valve (26) is connected to the inlet of a second one-way valve (19) through the exhaust pipeline (25). The outlet of the second one-way valve (19) is connected to the inlet of a second power valve (20) through the exhaust pipeline (25). The outlet of the second power valve (20) is connected to the inlet of a dehumidifier (21) through the exhaust pipeline (25). The outlet of the dehumidifier (21) is connected to the inlet of a second gas flow controller (22) through the exhaust pipeline (25). The outlet of the second gas flow controller (22) is connected to the inlet of a second pressure reducing and stabilizing valve (23) through the exhaust pipeline (25). The outlet of the second pressure reducing and stabilizing valve (23) is connected to the inlet of a second ball valve (24) through the exhaust pipeline (25). The outlet of the second ball valve (24) is connected to the exhaust interface (28) through the exhaust pipeline (25); The inflation and deflation control system includes a signal acquisition module and a power supply module. The signal output end of the signal acquisition module is connected to the signal input end of the signal processing module. The first signal output end of the signal processing module is connected to the signal input end of the prompt module. The second signal output end of the signal processing module is connected to the signal input end of the display module. The third signal output end of the signal processing module is connected to the signal input end of the inflation pressure stabilizing module. The fourth signal output end of the signal processing module is connected to the signal input end of the exhaust dehumidification module. The first power output end of the power supply module is connected to the power input end of the signal processing module. The second power output end of the power supply module is connected to the power input end of the display module. The third power output end of the power supply module is respectively connected to the power input ends of the signal acquisition module, the inflation pressure stabilizing module, and the exhaust dehumidification module.

2. The uninterruptible SF6 gas replacement and charging device without power outage according to claim 1, characterized in that: The inflation pressure stabilizing module includes a first one-way valve J1. The control signal input end IN of the first one-way valve J1 is connected to the 20th pin D20 of the signal processing module U1. The power supply end VCC of the first one-way valve J1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the first one-way valve J1 is grounded. The 3rd pin D3 of the signal processing module U1 is connected to the positive input end V+ of the first power valve M1. The negative input end V- of the first power valve M1 is connected to the negative pole of the power supply V1. The 4th pin D4 of the signal processing module U1 is connected to the power supply end VCC of the first pressure reducing and stabilizing valve L1. The grounding end GND of the first pressure reducing and stabilizing valve L1 is grounded. The 8th pin D8 of the signal processing module U1 is connected to the signal output end OUT of the first gas flow controller B1. The power supply end VCC of the first gas flow controller B1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the first gas flow controller B1 is grounded. The 6th pin D6 of the signal processing module U1 is connected to the signal input end IN of the first ball valve H1. The power supply end VCC of the first ball valve H1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the first ball valve H1 is grounded. The 62nd pin A8 of the signal processing module U1 is connected to the signal input end IN of the three-way valve C1. The power supply end VCC of the three-way valve C1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding end GND of the three-way valve C1 is grounded.

3. An uninterruptible SF6 gas replacement and charging device without power outage according to claim 1, characterized in that: The exhaust dehumidification module includes a second one-way valve J2. The signal input terminal IN of the second one-way valve J2 is connected to the 11th pin D11 of the signal processing module U1. The power supply terminal VCC of the second one-way valve J2 is connected to the positive pole of the power supply V1 through the switch S1. The ground terminal GND of the second one-way valve J2 is grounded. The 10th pin D10 of the signal processing module U1 is connected to the positive input terminal V+ of the second power valve M2. The negative input terminal V- of the second power valve M2 is connected to the negative pole of the power supply V1. The 9th pin D9 of the signal processing module U1 is connected to the power supply terminal VCC of the dehumidifier P1. The ground terminal GND of the dehumidifier P1 is grounded. The 5th pin D5 of the signal processing module U1 is connected to the signal output terminal OUT of the second gas flow controller B2. The power supply terminal VCC of the second gas flow controller B2 is connected to the positive pole of the power supply V1 through the switch S1. The ground terminal GND of the second gas flow controller B2 is grounded. The 7th pin D7 of the signal processing module U1 is connected to the power supply terminal VCC of the second pressure reducing and voltage stabilizing valve L2. The ground terminal GND of the second pressure reducing and voltage stabilizing valve L2 is grounded. The 13th pin D13 of the signal processing module U1 is connected to the signal input terminal IN of the second ball valve H2. The power supply terminal VCC of the second ball valve H2 is connected to the positive pole of the power supply V1 through the switch S1. The ground terminal GND of the second ball valve H2 is grounded.

4. An uninterruptible SF6 gas replacement and charging device without power outage according to claim 1, characterized in that: The prompt module includes an inflation prompt lamp group (2) and an exhaust prompt lamp group (3). The inflation prompt lamp group (2) includes a first light-emitting diode LED1. The anode of the first light-emitting diode LED1 is connected to the 32nd pin D32 of the signal processing module U1. The cathode of the first light-emitting diode LED1 is grounded through a first resistor R1. The 36th pin D36 of the signal processing module U1 is connected to the anode of a second light-emitting diode LED2. The cathode of the second light-emitting diode LED2 is grounded through a second resistor R2. The 40th pin D40 of the signal processing module U1 is connected to the anode of a third light-emitting diode LED3. The cathode of the third light-emitting diode LED3 is grounded through a third resistor R3. The exhaust prompt lamp group (3) includes a fourth light-emitting diode LED4. The anode of the fourth light-emitting diode LED4 is connected to the 44th pin D44 of the signal processing module U1. The cathode of the fourth light-emitting diode LED4 is grounded through a fourth resistor R4. The 52nd pin D52 of the signal processing module U1 is connected to the anode of a fifth light-emitting diode LED5. The cathode of the fifth light-emitting diode LED5 is grounded through a fifth resistor R5. The 48th pin D48 of the signal processing module U1 is connected to the anode of a sixth light-emitting diode LED6. The cathode of the sixth light-emitting diode LED6 is grounded through a sixth resistor R6. The display module is a liquid crystal display G1. The 54th pin A0 of the signal processing module U1 is connected to the first signal terminal P0 of the liquid crystal display G1. The 55th pin A1 of the signal processing module U1 is connected to the second signal terminal P1 of the liquid crystal display G1. The power supply terminal VCC of the liquid crystal display G1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the liquid crystal display G1 is grounded.

5. A charging and replacing SF6 gas device that is uninterrupted and does not require power outage, characterized in that: The signal acquisition module includes a micro weighing sensor Q1. The signal output terminal OUT of the micro weighing sensor Q1 is connected to the 53rd pin D53 of the signal processing module U1. The power supply terminal VCC of the micro weighing sensor Q1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the micro weighing sensor Q1 is grounded. The 24th pin D24 of the signal processing module U1 is connected to the digital signal terminal D1 of the gas density sensor Q2. The analog signal terminal A1 of the gas density sensor Q2 is connected to the 57th pin A3 of the signal processing module U1. The power supply terminal VCC of the gas density sensor Q2 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the gas density sensor Q2 is grounded. The 49th pin D49 of the signal processing module U1 is connected to the output terminal OUT of the gas pressure sensor Q3. The power supply terminal VCC of the gas pressure sensor Q3 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the gas pressure sensor Q3 is grounded. The 59th pin A5 of the signal processing module U1 is connected to the output terminal OUT of the micro water content sensor Q4. The power supply terminal VCC of the micro water content sensor Q4 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the micro water content sensor Q4 is grounded. The power supply terminal VCC of the signal processing module U1 is connected to the positive pole of the power supply V1 through the switch S1. The grounding terminal GND of the signal processing module U1 is grounded. The remaining pins of the signal processing module U1 are left vacant.

6. An uninterruptible SF6 gas replacement and charging device without power outage according to claim 1 or 2, characterized in that: The switch S1 (29) is a rocker switch.

7. An uninterruptible SF6 gas replacement and charging device without power outage according to claim 1 or 5, characterized in that: The liquid crystal display G1 (9) is a capacitive touch screen.

8. A charging and replacing SF6 gas device without power interruption according to claim 1, characterized in that: The moving wheel (4) is a moving self-locking wheel.

9. The uninterrupted power supply-free SF6 gas replacement and charging device according to claim 4, characterized in that: The first light-emitting diode LED1 and the fourth light-emitting diode LED4 are red light-emitting diodes. The second light-emitting diode LED2 and the fifth light-emitting diode LED5 are green light-emitting diodes. The third light-emitting diode LED3 and the sixth light-emitting diode LED6 are yellow light-emitting diodes.

10. The uninterruptible SF6 gas replacement and charging device without power outage according to claim 2, characterized in that: The signal processing module U1 is a single-chip microcomputer.

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