Rapid troubleshooting device for fault of gas density relay

Abstract

The utility model discloses a gas density relay fault rapid troubleshooting device which comprises a gas guide pipe 11 and a standard density relay 10, one end of the gas guide pipe 11 is connected with a standard gas delivery pipe, the other end of the gas guide pipe 11 is connected with a gas collection bag, and the standard density relay 10 is connected with the gas guide pipe 11 and used for measuring the gas density in the gas guide pipe 11. A density relay communication interface 9 is arranged on the standard density relay 10 and is used for transmitting standard gas density data measured by the standard density relay 10. According to the utility model, whether the SF6 density relay fault belongs to a mechanical fault or a communication fault and a gas chamber leakage fault can be rapidly checked on line.

Description

Technical Field

[0001] The utility model relates to the technical field of substation gas-filled equipment production, and particularly relates to a device for quickly troubleshooting gas density relay faults. Background Art

[0002] Sulfur hexafluoride (SF6) gas is an artificial inert gas, which is a colorless, odorless, non-toxic, non-flammable and stable gas under normal temperature and pressure. It has high stability and high insulation and arc extinguishing performance. Due to the above characteristics, it has been gradually applied to the insulation of high-voltage electrical equipment, such as common circuit breakers, high-voltage switches, GIS, GIL, etc.

[0003] However, once gas leakage occurs in the SF6 switch, the gas insulation performance inside the switch will be reduced, an arc will be generated inside the switch, damaging the switch and the connected equipment. At the same time, long-term SF6 gas leakage will also pollute the air and harm the contact personnel. Therefore, it is necessary to regularly check whether there is gas leakage in the SF6 gas in the gas chamber by reading the indication of the SF6 density relay. When the SF6 density relay has a mechanical failure, the data of the dial pointer read on-site is lower than the actual SF6 gas pressure in the gas chamber. If the pointer indicates a value reaching the set value, it will cause the internal mechanical switch to act, resulting in an output alarm signal or locking the circuit breaker closing and opening circuit; when the SF6 density relay has a remote communication failure, the gas chamber gas pressure received by the background software is either higher or lower than the actual SF6 gas pressure in the gas chamber. If the value reaches the alarm value set by the software, an alarm signal will be issued, and at the same time, the operation and maintenance personnel will misjudge that there is an abnormality in the gas chamber when viewing the records. Problems such as gas leakage, personnel poisoning, and foreign objects mixing into the gas chamber may occur during the disassembly and installation of the SF6 density relay. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for quickly troubleshooting gas density relay faults, which can quickly troubleshoot whether the SF6 density relay fault belongs to a mechanical fault, a communication fault or a gas chamber air leakage fault without removing the original SF6 density relay in the gas chamber.

[0005] To achieve the above object, the utility model is realized through the following technical solutions:

[0006] A device for quickly troubleshooting gas density relay faults includes a gas guide pipe 11 and a standard density relay 10. One end of the gas guide pipe 11 is connected to a standard gas pipeline, and the other end is connected to a gas collection bag. The standard density relay 10 is connected to the gas guide pipe 11 and is used to measure the gas density in the gas guide pipe 11. A density relay communication interface 9 is provided on the standard density relay 10 for transmitting the standard gas density data measured by the standard density relay 10.

[0007] Further, it also includes an intake electromagnetic valve 3, a gas pressure relay 4, a gas check valve 5, and a deflation electromagnetic valve 6. The gas pressure relay 4 is connected to the air duct 11 through a tee joint. The gas check valve 5 is connected in series in the middle of the air duct 11. The intake electromagnetic valve 3 and the deflation electromagnetic valve 6 are respectively arranged at positions of the air duct 11 close to the standard gas pipeline and the gas collecting bag.

[0008] Further, the air duct 11 is a T-shaped pipeline. The two ends of the straight connection are respectively connected to the standard gas pipeline and the gas collecting bag, and the third port is connected to the standard density relay 10.

[0009] Further, it also includes an intermediate relay 1. The intermediate relay 1 is electrically connected to the gas pressure relay 4, the intake electromagnetic valve 3, and the deflation electromagnetic valve 6.

[0010] Further, the air duct 11 is connected to the standard gas pipeline through a C-type self-locking quick connector 2 and is connected to the gas collecting bag through a pneumatic quick connector 7.

[0011] Further, the air duct 11 is made of stainless steel.

[0012] Further, the pressure relay 4 is a normally open type with a 24V output, and the adjustable operating pressure is 0.5 - 0.9 Mpa.

[0013] Further, the measuring range of the standard density relay 10 is -0.1 MPa to 0.9 MPa.

[0014] Further, the intermediate relay 1, the intake electromagnetic valve 3, and the deflation electromagnetic valve 6 are all driven by a DC 24V power supply.

[0015] The advantages of the present utility model are as follows: When the change-over switch of the controller 12 is turned to the intake position, the intake electromagnetic valve operates, and the SF6 gas in the measured gas chamber enters the standard density relay. By reading the mechanical indication and remote transmission data of the standard density relay and comparing the data, it is possible to quickly troubleshoot online whether the SF6 density relay failure belongs to a mechanical failure, a communication failure, or a gas chamber air leakage failure;

[0016] The C-type self-locking quick connector 2 has a self-locking function to prevent gas from flowing into the atmosphere during disassembly;

[0017] Using the communication interface can set the communication address of the spare density relay to the communication address of the original density relay when replacing the density relay, ensuring the stability of data upload. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the present utility model;

[0019] Figure 2 is the controller display interface diagram of Embodiment 2 of the present utility model;

[0020] Among them, 1. intermediate relay, 2. C-type self-locking quick connector, 3. intake solenoid valve, 4. gas pressure relay, 5. gas check valve, 6. exhaust solenoid valve, 7. pneumatic quick connector, 8. communication interface, 9. density relay communication interface, 10. standard density relay, 11. gas conduit, 12. controller. Specific implementation mode

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Embodiment 1

[0023] This embodiment discloses a device for quickly troubleshooting gas density relays. Please refer to Figure 1 , which includes a gas conduit 11, a standard density relay 10, an intake solenoid valve 3, a gas pressure relay 4, a gas check valve 5, an exhaust solenoid valve 6, and an intermediate relay 1. The gas conduit 11 is a T-shaped pipe, and the two ends connected in a straight line are respectively connected to a standard gas pipeline and a gas collecting bag. The gas conduit 11 is connected to the standard gas pipeline through a C-type self-locking quick connector 2. The female end of the C-type self-locking quick connector 2 is connected to the gas conduit 11, and the other end is connected to the inflatable port of the measured device through a male head and an air pipe. The gas conduit 11 is connected to the gas collecting bag through a pneumatic quick connector 7. The standard density relay 10 is connected to the third end of the gas conduit 11 through a connecting thread head for measuring the gas density in the gas conduit 11. The gas pressure relay 4 is connected to the gas conduit 11 through a tee. The gas check valve 5 is connected in series in the middle of the gas conduit 11. The intake solenoid valve 3 and the exhaust solenoid valve 6 are respectively arranged at positions of the gas conduit 11 close to the standard gas pipeline and the gas collecting bag. A density relay communication interface 9 is arranged on the standard density relay 10, and the density relay communication interface 9 is connected to the communication interface 8 for transmitting the standard gas density data measured by the standard density relay 10. The intermediate relay 1 is electrically connected to the gas pressure relay 4, the intake solenoid valve 3, and the exhaust solenoid valve 6.

[0024] The gas pressure relay 4 monitors the gas pressure entering the device. When the pressure exceeds the set value, the relay operates and the normally open contact closes to start the intermediate relay 1, thereby closing the intake solenoid valve 3 and opening the exhaust solenoid valve 6 to relieve pressure. The C-type self-locking quick connector 2 has a self-locking function to prevent gas from flowing into the atmosphere during disassembly, realizing the one-way flow of SF6 gas, preventing gas backflow, and avoiding debris particles from entering the measured gas chamber.

[0025] The air duct 11 is made of stainless steel. The pressure relay 4 is of the normally open type with a 24V output, and the adjustable operating pressure is 0.5 - 0.9 Mpa. The measuring range of the standard SF6 density relay 10 is -0.1 MPa to 0.9 MPa. The intermediate relay 1, the intake solenoid valve 3, and the exhaust solenoid valve 6 are all driven by a DC 24V power supply.

[0026] Embodiment 2

[0027] As shown in this embodiment Figure 2 The controller 12 panel is provided with a charging port, a power switch, a 7-wire aviation plug, an intake / exhaust control switch, a grounding terminal, and buttons. The charging port can charge the built-in 24V battery of the device by connecting to an external special charger. The power switch can turn the device on and off. The 7-wire aviation plug can receive the information transmitted by the density relay, provide 24V power for the standard density relay, and control the actions of the intake battery valve and the exhaust solenoid valve. The buttons can be used for function selection and exit, and numerical increase and decrease. It has functions such as system setting, data acquisition, parameter setting, and product information.

[0028] The communication interface 8 connects the standard density relay 10 and the controller 12. The controller 12 provides 24V power for the standard density relay 10. The standard density relay 10 feeds back the density data to the controller 12 through the communication interface 8. When the conversion switch of the controller 12 is turned to the intake position, the intake solenoid valve 3 operates to control the gas in the measured gas chamber to enter the standard density relay 10. Read the mechanical indication and remote transmission data of the standard density relay, and compare the data to quickly troubleshoot whether the SF6 density relay fault is a mechanical fault, a communication fault, or a gas chamber leakage fault online. The exhaust solenoid valve 6 is connected to the air duct 11 to release the SF6 gas in the device when the test is completed. The pneumatic quick connector 7 is externally connected to a plastic air pipe with a diameter of 6 and a gas collection bag to collect the discharged SF6 gas.

[0029] Embodiment 3

[0030] The working process of the above detector calibration device is as follows: When the remote transmission data of the density relay to be measured decreases and alarms, turn on the power switch of the controller 12. The C-type self-locking quick connector 2 is connected to the inflation port of the device to be measured through the male head and the gas transmission pipe. The standard density relay 10 is connected to the controller 12 through the communication interface 9 of the device. Taking the inert gas SF6 as an example, turn the selector switch of the controller 12 to the air intake position, and the intake solenoid valve operates. The SF6 gas in the measured gas chamber enters the standard density relay. Under the drive of the SF6 gas pressure, the mechanical indicating mechanism of the standard density relay deflects the pointer to indicate the SF6 gas pressure value in the gas chamber. Read the mechanical indication and compare it with the mechanical indication of the density relay to be measured to confirm whether they are consistent, so as to determine whether there is a fault in the mechanical indication of the SF6 density relay; Use the button to select the "data acquisition" function item, read the remote transmission data of the standard density relay, and compare it with the background software data of the density relay to be measured, so as to quickly determine whether there is a fault in the communication of the SF6 density relay online; If the mechanical indication data and the remote transmission data of the measured SF6 density relay are consistent with the data of the standard SF6 density relay, it means that the SF6 density relay is normal and there is indeed a gas leakage fault in the equipment gas chamber. After the test, turn the selector switch of the controller 12 to the air release position, close the intake solenoid valve 3, open the air release solenoid valve 6, and the SF6 gas in the gas transmission pipe 11 enters the gas collection bag through the air release solenoid valve 6 and the pneumatic quick connector 7.

[0031] Embodiment 4

[0032] When replacing the density relay, the original density relay is connected to the controller 12 through the communication interface 8. Turn on the power button of the controller 12, use the button to select the "parameter setting" function, and read the communication address of the density relay; After installing the spare density relay in place, connect the spare density relay to the controller 12 through the communication interface 8. Turn on the power button of the controller 12, use the button to select the "parameter setting" function, read the communication address of the spare density relay, use the increase and decrease buttons to increase or decrease the value, and set the communication address of the spare density relay to the communication address of the original density relay to realize data upload.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for quickly troubleshooting gas density relay faults, characterized in that, It includes an air duct (11) and a standard density relay (10). One end of the air duct (11) is connected to a standard gas pipeline, and the other end is connected to a gas collecting bag. The standard density relay (10) is connected to the air duct (11) and is used to measure the gas density in the air duct (11). A density relay communication interface (9) is provided on the standard density relay (10) for transmitting the standard gas density data measured by the standard density relay (10).

2. The gas density relay fault rapid troubleshooting device according to claim 1, wherein, It further includes an intake electromagnetic valve (3), a gas pressure relay (4), a gas check valve (5), and a deflation electromagnetic valve (6). The gas pressure relay (4) is connected to the air duct (11) through a tee. The gas check valve (5) is connected in series in the middle of the air duct (11). The intake electromagnetic valve (3) and the deflation electromagnetic valve (6) are respectively arranged at positions of the air duct (11) close to the standard gas pipeline and the gas collecting bag.

3. The gas density relay fault rapid troubleshooting device according to claim 1, characterized in that, The air duct (11) is a T-shaped pipeline. The two ends connected in a straight line are respectively connected to the standard gas pipeline and the gas collecting bag, and the third port is connected to the standard density relay (10).

4. The gas density relay fault quick troubleshooting device according to claim 2, characterized in that, It further includes an intermediate relay (1), and the intermediate relay (1) is electrically connected to the gas pressure relay (4), the intake electromagnetic valve (3), and the deflation electromagnetic valve (6).

5. The gas density relay fault rapid troubleshooting device according to claim 1, characterized in that, The air duct (11) is connected to the standard gas pipeline through a C-type self-locking quick connector (2) and is connected to the gas collecting bag through a pneumatic quick connector (7).

6. The gas density relay fault quick troubleshooting device according to claim 1, wherein The air duct (11) is made of stainless steel.

7. The gas density relay fault quick troubleshooting device according to claim 2, wherein The pressure relay (4) is a normally open type with a 24V output, and the adjustable operating pressure is 0.5 - 0.9 Mpa.

8. The gas density relay fault quick troubleshooting device according to claim 1, wherein The measuring range of the standard density relay (10) is -0.1 MPa to 0.9 MPa.

9. The gas density relay fault quick troubleshooting device according to claim 4, characterized in that, The intermediate relay (1), the intake electromagnetic valve (3), and the deflation electromagnetic valve (6) are all driven by a DC 24V power supply.

Images