Remote transmission type sulfur hexafluoride gas density relay with digital display window

Abstract

The utility model relates to the field of extra-high voltage power transmission and transformation equipment in the modern manufacturing industry, in particular to a remote transmission type sulfur hexafluoride gas density relay with a digital display window, which is a mechatronics instrument and is characterized by comprising a mechanical unit, an electronic unit, a bridging unit and a screen display unit. The mechanical unit is connected to the electronic unit. The electronic unit is electrically connected to the screen display unit and the remote server through the bridging unit. The mechanical unit is installed in the airtight container, and the airtight container is filled with sulfur hexafluoride gas. According to the remote transmission type sulfur hexafluoride gas density relay with the digital display window, the bridging unit and the screen display unit are additionally arranged, so that remote transmission electric signals can be displayed in situ, and compared with the prior art, the remote transmission type sulfur hexafluoride gas density relay has the remarkable characteristics that the problem that the remote transmission electric signals cannot be displayed in the mounting, debugging and running process of the remote transmission type sulfur hexafluoride gas density relay is solved; teletransmission electric signals cannot be checked on site; and the consistency of electromechanical signals is difficult to check.

Description

Technical Field

[0001] The utility model relates to the field of extra-high voltage power transmission and transformation equipment in modern manufacturing, in particular to a remote transmission type sulfur hexafluoride gas density relay with a digital display window. Background Art

[0002] In order to accelerate the realization of the digitalization and intelligentization of high-voltage power grids, remote transmission type sulfur hexafluoride gas density relays will be widely used in sulfur hexafluoride high-voltage and extra-high voltage electrical equipment such as circuit breakers, instrument transformers, transformers, and pipe busbars. The density P20 is an important indicator of the insulating and arc-extinguishing performance of sulfur hexafluoride gas. How to accurately and reliably monitor on-site and online is related to the safety and maintenance of the operation of high-voltage power grids, and also involves the environmental protection of the nature on which humans depend for survival.

[0003] The existing remote transmission type sulfur hexafluoride gas density relay consists of two major parts: mechanical and electronic. The mechanical part is responsible for on-site monitoring of the indication, alarm, and locking of the sulfur hexafluoride gas density P20. The function of the electronic part is to collect the pressure and temperature of the sulfur hexafluoride gas, calculate the density P20 according to the sulfur hexafluoride gas state mathematical model, and transmit it to the remote server to achieve online monitoring.

[0004] For the existing remote transmission type sulfur hexafluoride gas density relay, only the density P20 indication value and the electrical contact state of the mechanical part can be observed on-site, and the various data of the remote transmission electrical signal, such as the sulfur hexafluoride gas pressure, temperature, and density P20, cannot be read locally. If further information about the remote transmission electrical signal is needed, it is necessary to go to the control center to check, which brings inconvenience to installation, debugging, and operation, and it is also difficult to verify the consistency of the mechanical and electrical signals. Content of the Utility Model

[0005] The purpose of the utility model is to provide a remote transmission type sulfur hexafluoride gas density relay with a digital display window to solve the problems encountered in installation, debugging, and operation in the prior art.

[0006] The utility model provides a remote transmission type sulfur hexafluoride gas density relay with a digital display window, which is characterized in that it includes a mechanical unit, an electronic unit, a bridging unit, and a screen display unit; the electronic unit is electrically connected to the screen display unit and the remote server through the bridging unit; the mechanical unit and the electronic unit straddle an airtight container; sulfur hexafluoride gas is filled in the airtight container.

[0007] Furthermore, the mechanical unit includes a detection module and a relay module; the detection module passes through the airtight container; the relay module is installed on the detection module.

[0008] Further, the detection module includes a barometric pressure detection sub-module, a mechanical transmission sub-module, and a temperature compensation sub-module; one end of the temperature compensation sub-module is connected to the mechanical transmission sub-module, and the other end is connected to the barometric pressure detection sub-module; the mechanical transmission sub-module is installed on the airtight container; the barometric pressure detection sub-module is installed across the airtight container.

[0009] Further, the barometric pressure detection sub-module is a bourdon tube assembly; the mechanical transmission sub-module is a pressure gauge movement; the temperature compensation sub-module is a bimetallic temperature compensation piece.

[0010] Further, the relay module is an electric contact point.

[0011] Further, the electronic unit includes a sensing module and a control module; the control module is electrically connected to the sensing module; the sensing module is electrically connected to the bridging unit; the bridging unit is electrically connected to the display unit and the remote server.

[0012] Further, the sensing module includes a temperature sensor and a pressure sensor; the temperature sensor and the pressure sensor are installed across the airtight container; both the temperature sensor and the pressure sensor are electrically connected to the control module.

[0013] Further, the bridging unit includes a first port, a second port, and a third port; there is electrical isolation between the second port and the third port; the first port is electrically connected to the electronic unit; the second port is electrically connected to the display unit; the third port is electrically connected to the remote server.

[0014] Further, the first port and the third port are RS485 interfaces; the second port is an I2C interface.

[0015] Further, the display unit is an OLED display screen.

[0016] The digital display window remote transmission type sulfur hexafluoride gas density relay of the present utility model realizes on-site display of remote transmission electrical signals by adding a bridging unit and a display unit. Compared with the prior art, its remarkable feature is that it solves the technical problems of being unable to view remote transmission electrical signals on-site and difficult to assess the consistency of mechanical and electrical signals during the installation, commissioning, and operation of the remote transmission type sulfur hexafluoride gas density relay. Description of the Drawings

[0017] Figure 1 is a system block diagram of a preferred embodiment of the digital display window remote transmission type sulfur hexafluoride gas density relay of the present utility model;

[0018] Figure 2It is the physical structure diagram of the far - transmission sulfur hexafluoride gas density relay with a digital display window of the present utility model.

[0019] In the figure:

[0020] 10 - Mechanical unit, 11 - Detection module, 12 - Relay module;

[0021] 20 - Electronic unit, 21 - Sensing module, 22 - Control module;

[0022] 30 - Bridging unit, 31 - First port, 32 - Second port, 33 - Third port;

[0023] 40 - Screen display unit;

[0024] 50 - Remote server. Specific embodiments

[0025] The following will describe the specific embodiments of the present utility model with reference to the accompanying drawings. Embodiment

[0026] Please refer to Figure 1 , the present utility model discloses a far - transmission sulfur hexafluoride gas density relay with a digital display window. As shown in the figure, a preferred embodiment thereof includes a mechanical unit 10, an electronic unit 20, a bridging unit 30 and a screen display unit 40.

[0027] The mechanical unit 10 includes a detection module 11 and a relay module 12, which are installed on an airtight container filled with pressurized sulfur hexafluoride gas. The detection module 11 is used to measure the density P20 of the sulfur hexafluoride gas. It includes a barometric pressure detection sub - module, a mechanical transmission sub - module and a temperature compensation sub - module. Among them, the barometric pressure detection sub - module is a bourdon tube assembly, which deforms with the change of barometric pressure. One end spans the airtight container, and the other end is connected to the mechanical transmission sub - module through the temperature compensation sub - module; the mechanical transmission sub - module is a pressure gauge movement, which converts the deformation of the bourdon tube assembly into an angular displacement. A pointer with a lever is equipped on the movement shaft to realize the linkage between barometric pressure change and indication value. The temperature compensation sub - module is a bimetallic temperature compensation sheet, which has the mechanical property of expanding and contracting with temperature change. It is connected between the bourdon tube assembly and the movement to eliminate the change of indication value caused by temperature when barometric pressure. The relay module 12 is an electric contact installed on the movement. The electric contact is composed of a moving conductive pin and a static conductive pin. The position of the static conductive pin is preset. The lever on the pointer drives the moving conductive pin. When the barometric pressure drops to the warning pressure and below, the moving conductive pin contacts the static conductive pin, and the control circuit is connected; when the barometric pressure rises above the warning pressure, the moving conductive pin separates from the static conductive pin, and the control circuit is disconnected.

[0028] The electronic unit 20 includes a sensing module 21 and a control module 22. The sensing module 21 includes a temperature sensor and a pressure sensor. The temperature sensor and the pressure sensor respectively output corresponding electrical signals. The sensing module 21 is electrically connected to the control module 22. The control module 22 reads the electrical signals of the sensing module 21, calculates and converts them into the density P20 electrical signal according to the sulfur hexafluoride gas mathematical model, and then transmits the temperature, pressure and density P20 electrical signals to the display unit 40 and the remote server 50 through the bridging unit 30. After receiving the information, the remote server 50 can realize remote online monitoring. The display unit 40 is an OLED display screen, which is installed together with the mechanical unit 10 and is used to display the specific values of the temperature, pressure and density P20 electrical signals, facilitating on-site staff to check in time.

[0029] The bridging unit 30 includes a first port 31, a second port 32 and a third port 33. The first port 31 and the third port are RS485 interfaces, and the second port 32 is an I2C interface. Electrical isolation is adopted between the second port 32 and the third port 33, which are two independent switching channels and do not share a backplane bus, thereby isolating the conflict domain and eliminating signal crosstalk between them. The first port 31 is connected to the control module 22 in the electronic unit 20. The third port 33 is connected to the remote server 50, and together with the first port 31, it is responsible for establishing communication between the control module 22 and the remote server 50, such as transmitting the temperature, pressure and density P20 electrical signals and receiving various instructions from the remote server 50. The second output port 32 is connected to the display unit 40, and together with the first port 31, it is responsible for transmitting the temperature, pressure and density P20 electrical signals sent by the control module 22 to the display unit 40 and displaying them on the display unit 40.

[0030] The above is only the preferred embodiment of the present invention and is not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should fall within the technical scope of the present invention.

Claims

1. A remote transmission sulfur hexafluoride gas density relay with digital display window, characterized in that: It comprises a mechanical unit, an electronic unit, a bridge unit and a screen display unit; the electronic unit is electrically connected to the screen display unit and a remote server through the bridge unit; the mechanical unit and the electronic unit span an airtight container; The airtight container is filled with sulfur hexafluoride gas.

2. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 1, characterized in that: The mechanical unit comprises a detection module and a relay module; the detection module passes through the airtight container; and the relay module is mounted on the detection module.

3. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 2, characterized in that: The detection module comprises an air pressure detection submodule, a mechanical transmission submodule and a temperature compensation submodule; one end of the temperature compensation submodule is connected to the mechanical transmission submodule, and the other end is connected to the air pressure detection submodule; The mechanical transmission submodule is installed on the airtight container; The air pressure detection submodule is installed across the airtight container.

4. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 3, characterized in that: The air pressure detection submodule is a spring tube assembly; the mechanical transmission submodule is a pressure gauge movement; and the temperature compensation submodule is a bimetallic temperature compensation sheet.

5. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 2, characterized in that: The relay module is an electrical contact.

6. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 1, characterized in that: The electronic unit includes a sensor module and a control module; the control module is electrically connected to the sensor module; the sensor module is electrically connected to the bridge unit; and the bridge unit is electrically connected to the display unit and the remote server.

7. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 6, characterized in that: The sensing module includes a temperature sensor and a pressure sensor; the temperature sensor and the pressure sensor span the airtight container; and the temperature sensor and the pressure sensor are both electrically connected to the control module.

8. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 1, characterized in that: The bridge unit comprises a first port, a second port and a third port; the second port and the third port are electrically isolated; the first port is electrically connected to the electronic unit; and the second port is electrically connected to the display unit; The third port is electrically connected to the remote server.

9. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 8, characterized in that: The first port and the third port are RS485 interfaces; the second port is an I2C interface.

10. The remote transmission sulfur hexafluoride gas density relay with digital display window as claimed in claim 1, characterized in that: The display unit is an OLED display screen.

Images