SF6 pressure state monitoring device applied to high-voltage electrical equipment

Abstract

The utility model relates to an SF6 pressure state monitoring device applied to high-voltage electrical equipment, which comprises a mounting bracket, a connecting valve body is arranged on the mounting bracket, the connecting valve body is connected with a three-phase air pipe, one pipe orifice of the three-phase air pipe is communicated with an inflation inlet of an SF6 circuit breaker, and the other pipe orifice of the three-phase air pipe is communicated with an inflation outlet of the SF6 circuit breaker. The connecting valve body is provided with a density relay used for collecting the density of SF6 gas in the transmission pipeline, the density relay is electrically connected with a controller, the controller is electrically connected with a gas pressure gauge, and the gas pressure gauge is installed on the connecting valve body. The SF6 density relay monitors the state of the SF6 gas by measuring the density of the SF6 gas, the SF6 density relay sends the collected data to the controller, the controller transmits the data received from the SF6 density relay to the gas pressure gauge, the gas pressure gauge displays the SF6 pressure state in the connecting valve body, and the gas pressure of the SF6 electrical equipment can be monitored conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to an SF6 pressure status monitoring device used in high-voltage electrical equipment. Background Art

[0002] High-voltage electrical appliances refer to electrical equipment used in circuits with voltage levels of 1000V and above. These devices undertake important functions such as closing, breaking, protection, control, regulation and measurement in high-voltage lines. Among them, SF6 gas has excellent insulation properties, extremely high dielectric strength, and is not easy to conduct electricity or be easily affected by moisture. Therefore, it is widely used as an insulating medium in high-voltage electrical equipment.

[0003] FP / OHB 40.5kV SF6 circuit breakers have been widely used in power sectors and industrial and mining enterprises, promoting the rapid development of the power industry. In recent years, with the rapid economic development, the use of SF6 electrical equipment has increased, and the requirements for power supply have become increasingly stringent, requiring that power outages cannot be random. Therefore, ensuring the reliable operation of SF6 electrical equipment has become a key task for power systems.

[0004] The existing FP / OHB type 40.5kV SF6 circuit breaker is only equipped with gas low pressure alarm and lockout electrical contacts. There is no specific quantitative and intuitive monitoring of gas pressure during operation, resulting in the inability to detect potential gas leakage risks in the equipment at an early stage. Utility Model Content

[0005] In order to facilitate the monitoring of the gas pressure of SF6 electrical equipment, the present application provides an SF6 pressure status monitoring device for high-voltage electrical equipment.

[0006] The present application provides a device for monitoring the SF6 pressure state in high-voltage electrical equipment, which adopts the following technical solution:

[0007] An SF6 pressure state monitoring device for high-voltage electrical equipment includes a mounting bracket, a connecting valve body provided on the mounting bracket, the connecting valve body connected to a three-phase gas pipe, one pipe opening of the three-phase gas pipe being connected to the charging port of an SF6 circuit breaker, the connecting valve body provided with a density relay for collecting the SF6 gas density in the transmission pipeline, the density relay electrically connected to a controller, the controller electrically connected to a gas pressure gauge, and the gas pressure gauge mounted on the connecting valve body.

[0008] By adopting the above technical solution, the SF6 density relay monitors the status of SF6 gas by measuring its density. The SF6 density relay sends the collected data to the controller, and the controller transmits the data received from the SF6 density relay to the gas pressure gauge. The gas pressure gauge displays the SF6 pressure status in the connected valve body, making it convenient to monitor the gas pressure of SF6 electrical equipment and to detect gas leaks in a timely manner.

[0009] Optionally, a temperature compensation system is provided inside the density relay.

[0010] By adopting the above technical solution, the density of SF6 gas is affected by temperature, and the temperature compensation system is used to ensure the accuracy of the measurement results of the density relay at different temperatures.

[0011] Optionally, a non-disassembly check valve is connected to the connecting valve body.

[0012] By adopting the above technical solution, the non-disassembly calibration valve can control the pressure changes in the connected valve body during the pressure detection process without removing the relay and the gas pressure gauge, reducing the errors caused by human operation and improving the accuracy and reliability of calibration.

[0013] Optionally, an alarm is installed on the mounting bracket, and the alarm is electrically connected to the controller.

[0014] By adopting the above technical solution, the alarm can be used to conveniently and promptly remind the staff to check and repair the device.

[0015] Optionally, a relay housing for mounting a density relay is provided on the connecting valve body, and a connecting component is provided between the relay housing and the gas pressure gauge.

[0016] By adopting the above technical solution, rapid assembly between the relay housing and the gas pressure gauge is achieved through the connecting component.

[0017] Optionally, the connecting assembly includes a connecting rod, a clamping block, a downward pressure rod and an elastic spring. A connecting groove is provided on the gas pressure gauge. The connecting rod is located in the connecting groove and is movably connected to the gas pressure gauge. The elastic spring is located in the connecting groove, and both ends of the elastic spring are fixedly connected to the side of the connecting rod and the inner wall of the connecting groove respectively. The clamping block is located outside the connecting groove and the clamping block is fixedly installed on the end of the connecting rod. The downward pressure rod is fixedly installed on the side of the connecting rod away from the elastic spring. An intermediate groove is provided on the relay housing, and the side wall of the intermediate groove is a clamping groove that cooperates with the clamping block.

[0018] By adopting the above technical solution, the pressing rod is pressed downward, the connecting rod moves downward, the elastic spring is compressed, the clamping block extends into the middle groove, the pressing rod is released, the compressed elastic spring is released, and the clamping block moves into the clamping groove, thereby improving the stability of the connection between the relay housing and the gas pressure gauge. When the relay housing and the gas pressure gauge need to be separated, the pressing rod is pressed downward, the clamping block moves from the clamping groove, and the relay housing and the gas pressure gauge are separated. The clamping block and the connecting rod are taken out of the middle groove, which facilitates the quick disassembly and assembly of the relay housing and the gas pressure gauge, thereby facilitating the maintenance of the density relay in the relay housing.

[0019] Optionally, the connecting valve body is fixedly connected to the mounting bracket via a fixing rod.

[0020] By adopting the above technical solution, the connecting valve body is mounted on the mounting bracket via the fixing rod, thereby fixing the connecting valve body.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] The SF6 density relay monitors the status of SF6 gas by measuring its density. The SF6 density relay sends the collected data to the controller, and the controller transmits the data received from the SF6 density relay to the gas pressure gauge. The gas pressure gauge displays the SF6 pressure status in the connected valve body, making it convenient to monitor the gas pressure of SF6 electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The diagram is a schematic diagram of the overall structure of an SF6 pressure status monitoring device used in high-voltage electrical equipment.

[0024] Figure 2 It is a block diagram used to show the connections between the electronic control components in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram for showing the structure of the connection components in the embodiment of the present application.

[0026] Explanation of the accompanying symbols: 1. Mounting bracket; 11. Fixing rod; 12. Alarm; 2. Connecting valve body; 3. Three-phase gas pipe; 4. Density relay; 5. Controller; 6. Gas pressure gauge; 61. Connecting groove; 7. Non-disassembly calibration valve; 8. Relay housing; 81. Middle groove; 82. Snap-in groove; 9. Connecting assembly; 91. Connecting rod; 92. Snap-in block; 93. Press-down rod; 94. Elastic spring. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0028] The embodiment of the present application discloses a device for monitoring the SF6 pressure status in high-voltage electrical equipment.

[0029] Reference Figure 1 A SF6 pressure state monitoring device used in high-voltage electrical equipment includes a mounting bracket 1, on which a connecting valve body 2 is provided. The connecting valve body 2 is mounted on the mounting bracket 1 through a fixing rod 11 to fix the connecting valve body 2.

[0030] Reference Figure 1 and Figure 2 Connecting valve body 2 is connected to a three-phase gas pipe 3, one of the pipe ends of which is connected to the charging port of the SF6 circuit breaker. Connecting valve body 2 is mounted with a density relay 4 for collecting the density of SF6 gas within the transmission pipeline. Density relay 4 is electrically connected to a controller 5, which is electrically connected to a gas pressure gauge 6 mounted on connecting valve body 2. SF6 density relay 4 monitors the status of SF6 gas by measuring its density. SF6 density relay 4 transmits the collected data to controller 5, which transmits the data received from SF6 density relay 4 to gas pressure gauge 6. Gas pressure gauge 6 displays the SF6 pressure status within connecting valve body 2, facilitating gas pressure monitoring of SF6 electrical equipment.

[0031] The density relay 4 is internally provided with a temperature compensation system. The density of SF6 gas is affected by temperature, and the temperature compensation system ensures the accuracy of the measurement results of the density relay 4 at different temperatures.

[0032] Reference Figure 1 The connecting valve body 2 is connected to a non-disassembly check valve 7. The non-disassembly check valve 7 can control the pressure change in the connecting valve body 2 during the pressure detection process without removing the relay and the gas pressure gauge 6, thereby reducing errors caused by human operation and improving the accuracy and reliability of the calibration.

[0033] Reference Figure 1 and Figure 2 An alarm 12 is mounted on the mounting bracket 1 and is electrically connected to the controller 5. When the SF6 gas density in the connected valve body 2 is lower than a preset value, the density relay 4 collects the SF6 gas density in the connected valve body 2 and sends it to the controller 5. The controller 5 compares the SF6 gas density in the connected valve body 2 collected by the density relay 4 with the preset value. If the density is lower than the preset value, the controller sends a command to the alarm 12, causing the alarm 12 to operate. The alarm 12 can be used to promptly remind staff to inspect and repair the device.

[0034] Reference Figure 3A relay housing 8 for installing the density relay 4 is provided on the connecting valve body 2, and a connecting assembly 9 is provided between the relay housing 8 and the gas pressure gauge 6. The connecting assembly 9 includes a connecting rod 91, a clamping block 92, a pressing rod 93 and an elastic spring 94. A connecting groove 61 is provided on the gas pressure gauge 6, the connecting rod 91 is located in the connecting groove 61 and is movably connected to the gas pressure gauge 6, the elastic spring 94 is located in the connecting groove 61, and the two ends of the elastic spring 94 are respectively fixedly connected to the side surface of the connecting rod 91 and the inner wall of the connecting groove 61, the clamping block 92 is located outside the connecting groove 61 and the clamping block 92 is fixedly installed on the end of the connecting rod 91, the pressing rod 93 is fixedly installed on the side of the connecting rod 91 away from the elastic spring 94, and an intermediate groove 81 is provided on the relay housing 8, and a clamping groove 82 whose side wall of the intermediate groove 81 cooperates with the clamping block 92. Press the down-press rod 93 downward, the connecting rod 91 moves downward, the elastic spring 94 is compressed, and the clamping block 92 extends into the middle groove 81. Release the down-press rod 93, the compressed elastic spring 94 is released, and the clamping block 92 moves into the clamping groove 82, thereby improving the stability of the connection between the relay housing 8 and the gas pressure gauge 6. When it is necessary to separate the relay housing 8 and the gas pressure gauge 6, press the down-press rod 93 downward, the clamping block 92 moves from the clamping groove 82, and separates the relay housing 8 and the gas pressure gauge 6. The clamping block 92 and the connecting rod 91 are removed from the middle groove 81, which facilitates the quick disassembly and assembly of the relay housing 8 and the gas pressure gauge 6, thereby facilitating the maintenance of the density relay 4 in the relay housing 8.

[0035] The implementation principle of an SF6 pressure status monitoring device used in high-voltage electrical equipment in an embodiment of the present application is as follows: the SF6 density relay 4 monitors its status by measuring the density of SF6 gas, the SF6 density relay 4 sends the collected data to the controller 5, and the controller 5 transmits the data received from the SF6 density relay 4 to the gas pressure gauge 6. The gas pressure gauge 6 displays the SF6 pressure status in the connecting valve body 2, which facilitates the monitoring of the gas pressure of the SF6 electrical equipment and enables timely detection when a gas leak occurs.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A SF6 pressure status monitoring device used in high-voltage electrical equipment, characterized by: The invention comprises a mounting bracket (1), wherein a connecting valve body (2) is provided on the mounting bracket (1), wherein the connecting valve body (2) is connected to a three-phase gas pipe (3), wherein one pipe opening of the three-phase gas pipe (3) is connected to the gas charging port of the SF6 circuit breaker, wherein a density relay (4) for collecting the density of SF6 gas in the transmission pipeline is provided on the connecting valve body (2), wherein the density relay (4) is electrically connected to a controller (5), wherein the controller (5) is electrically connected to a gas pressure gauge (6), and wherein the gas pressure gauge (6) is mounted on the connecting valve body (2).

2. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 1 is characterized in that: A temperature compensation system is provided inside the density relay (4).

3. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 1 is characterized in that: The connecting valve body (2) is connected to a non-disassembly checking valve (7).

4. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 1 is characterized in that: An alarm (12) is installed on the mounting bracket (1), and the alarm (12) is electrically connected to the controller (5).

5. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 1 is characterized in that: A relay housing (8) for mounting a density relay (4) is provided on the connecting valve body (2), and a connecting assembly (9) is provided between the relay housing (8) and the gas pressure gauge (6).

6. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 5 is characterized in that: The connecting assembly (9) includes a connecting rod (91), a clamping block (92), a pressing rod (93) and an elastic spring (94); a connecting groove (61) is provided on the gas pressure gauge (6); the connecting rod (91) is located in the connecting groove (61) and is movably connected to the gas pressure gauge (6); the elastic spring (94) is located in the connecting groove (61), and the two ends of the elastic spring (94) are respectively fixedly connected to the side of the connecting rod (91) and the inner wall of the connecting groove (61); the clamping block (92) is located outside the connecting groove (61) and the clamping block (92) is fixedly installed on the end of the connecting rod (91); the pressing rod (93) is fixedly installed on the side of the connecting rod (91) away from the elastic spring (94); an intermediate groove (81) is provided on the relay housing (8); the side wall of the intermediate groove (81) is a clamping groove (82) that matches the clamping block (92).

7. The SF6 pressure status monitoring device for high-voltage electrical equipment according to claim 1 is characterized in that: The connecting valve body (2) is fixedly connected to the mounting bracket (1) via a fixing rod (11).

Images