GIS equipment expansion joint displacement online monitoring device

Abstract

The utility model relates to a GIS equipment expansion joint displacement on-line monitoring device which comprises a bus first end, a bus second end, a first mounting plate mounted on a first flange of the bus first end, a second mounting plate mounted on a second flange of the bus second end, and a corrugated pipe arranged between the first mounting plate and the second mounting plate. The body end of the linear displacement sensor is fixed on a linear displacement sensor fixing support, a detection rod of the linear displacement sensor is fixed on a fixing plate, the fixing support is fixed on the first mounting plate, the fixing plate is fixed on the second mounting plate, and the linear displacement sensor is in electric signal connection with a displacement monitoring alarm host. Due to the fact that the linear displacement sensor fixing support and the fixing plate are used, the linear displacement sensor is easy to install in the installation process, and the initial value of the linear displacement sensor can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to SF6 gas-insulated metal-enclosed switch gear, which includes GIS (Gas Insulated Metal-enclosed Switch Gear) equipment monitoring technology, in particular to an online monitoring device for the displacement of expansion joints of GIS equipment. Background Art

[0002] At present, GIS equipment, namely gas-insulated metal-enclosed switchgear, is widely used in the fields of power system industrial production, etc. Among them, the gas-insulated metal-enclosed pipeline busbar (GIL) is generally used for long-distance power transmission in power stations. The busbar cylinder is filled with 0.4-0.6MPa sulfur hexafluoride gas as an insulating medium. The busbar has the advantages of reliable performance, long life, small size and easy maintenance. In GIS equipment, the expansion joint is an important component. With the changes in ambient temperature and load, the pipeline busbar will produce axial deformation due to thermal expansion and contraction. In order to avoid damage to the pipeline busbar, a pressure-equalizing bellows is required to be installed on the outer shell of the busbar as an expansion joint to absorb the deformation. The expansion joint is supported by a sliding bracket and a fixed bracket, and its displacement change directly affects the stability and safety of the equipment. However, the traditional expansion joint displacement monitoring method usually requires manual regular inspection, which is complicated to operate and cannot grasp the displacement change in real time. Therefore, it is of great significance to develop a device that can monitor the displacement of the expansion joint in real time online. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an online monitoring device for the displacement of the expansion joint of a GIS equipment, comprising: a first end of a busbar, a second end of a busbar, a first mounting plate installed on a first flange of the first end of the busbar, a second mounting plate installed on a second flange of the second end of the busbar, a bellows is provided between the first mounting plate and the second mounting plate, and is characterized in that it also includes:

[0004] The linear displacement sensor has its body end fixed on a linear displacement sensor fixing bracket, and its detection rod fixed on a fixing plate, wherein the fixing bracket is fixed on a first mounting plate, the fixing plate is fixed on a second mounting plate, and the linear displacement sensor electrical signal is connected to a displacement monitoring alarm host.

[0005] The linear displacement sensor is installed at one end of the linear displacement sensor fixing bracket, and a first folded edge is provided at the other end, and the first folded edge is fixed on the first mounting plate.

[0006] The first folded edge has a first mounting groove, and the fastening bolt passes through the first flange, the first mounting plate and the first mounting groove of the first folded edge in sequence and is locked and fixed.

[0007] At least two fixing members are arranged on the fixing bracket of the linear displacement sensor, each fixing member has a receiving opening, the receiving openings of the two fixing members are arranged opposite to each other, and the two ends of the linear displacement sensor are respectively received and fixed by the receiving openings of the two fixing members.

[0008] It also includes a temperature sensor, which is fixed on the temperature sensor communication cable. The linear displacement sensor fixing bracket has an L-shaped body, one end of which is used to fix the temperature sensor and is close to the pipe wall at the first end of the busbar, and the other end of the L-shaped body is a second folded edge, which is fixed on the first flange.

[0009] Beneficial effects of the utility model:

[0010] Easy installation: Due to the use of linear displacement sensor fixing bracket and fixing plate, the linear displacement sensor is easy to install during the installation process and the initial value of the linear displacement sensor can be accurately adjusted.

[0011] Improve monitoring accuracy: The device uses linear displacement sensors and temperature sensors, which can accurately monitor the displacement and temperature changes of the expansion joint in real time, improving the monitoring precision and accuracy.

[0012] Real-time monitoring: The device can monitor the displacement and temperature changes of the expansion joint in real time, detect abnormal conditions in time, and avoid the time intervals and risks of missed inspections in traditional periodic inspections.

[0013] Reduce operation and maintenance costs: The device realizes online monitoring and does not require manual regular inspection, which reduces operation and maintenance costs and improves the reliability and safety of the equipment.

[0014] Convenient remote monitoring and management: The device uploads monitoring data to the remote monitoring center through the data acquisition module, which facilitates remote monitoring and management and improves work efficiency and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the distribution diagram of the busbar deformation online monitoring system of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model after the installation of the online monitoring device for the expansion joint displacement of GIS equipment;

[0017] Figure 3 For this utility model Figure 2 Side view of

[0018] Figure 4 This is an assembly diagram of the utility model linear displacement sensor and its mounting bracket;

[0019] Figure 5 For this utility model Figure 4 A top view of

[0020] Figure 6 This is a schematic diagram of the temperature sensor of the utility model.

[0021] In the figure: 1 first end of busbar; 2 second end of busbar; 11 first flange; 12 first mounting plate; 13 fastening bolt; 14 telescopic joint tie rod; 15 cylinder; 16 rod body; 17 bellows; 18 second mounting plate; 19 second flange; 3 linear displacement sensor; 31 linear displacement sensor communication cable; 32 linear displacement sensor fixing bracket; 33 fixing piece; 34 second mounting groove; 35 first folded edge; 36 first mounting groove; 37 fixing plate; 38 detection rod; 39 limit piece; 40 temperature sensor; 41 temperature sensor communication cable; 42 temperature sensor fixing bracket, 43 second folded edge; 43 third mounting groove. DETAILED DESCRIPTION

[0022] The above and other technical features and functions of the present invention are described in detail below with reference to the attached Figures 1 to 6 The embodiments are described in detail.

[0023] definition:

[0024] Linear displacement sensor: used to measure the linear displacement change of the expansion joint. The sensor is installed on the expansion joint, can sense the displacement change of the expansion joint in real time, and convert the displacement signal into an electrical signal output.

[0025] Temperature sensor: used to measure the temperature around the expansion joint. The sensor is installed near the expansion joint and can sense the temperature changes around the expansion joint in real time and convert the temperature signal into an electrical signal output.

[0026] Data acquisition module: Receives signals from linear displacement sensors and temperature sensors, processes and stores the signals. This module also has data transmission function, which can upload monitoring data to the remote monitoring center.

[0027] Alarm module: Determine whether the displacement and temperature of the expansion joint are abnormal based on the output signal of the data acquisition module. When an abnormality is found, the module will trigger the alarm device and notify the staff to handle it in time.

[0028] The utility model aims to provide an online monitoring device for the displacement of a telescopic joint of a GIS equipment, including a linear displacement sensor and a temperature sensor, which can monitor the displacement change and temperature of the telescopic joint in real time, and specifically includes: a first end 1 of a busbar, a second end 2 of a busbar, a first mounting plate 12 is installed on a first flange 11 of the first end 1 of the busbar, a second mounting plate 18 is installed on a second flange 19 of the second end 2 of the busbar, a bellows 17 is arranged between the first mounting plate 12 and the second mounting plate 18, and is characterized in that it also includes:

[0029] The linear displacement sensor 3 has its body end fixed on the linear displacement sensor fixing bracket 32, and its detection rod 38 is fixed on the fixing plate 37, wherein the fixing bracket 32 ​​is fixed on the first mounting plate 12, the fixing plate 37 is fixed on the second mounting plate 18, and the electrical signal of the linear displacement sensor 3 is connected to the displacement monitoring alarm host. Due to the use of the linear displacement sensor fixing bracket 32 ​​and the fixing plate 37, the linear displacement sensor 3 is easy to install during the installation process and the initial value of the linear displacement sensor 3 can be accurately adjusted.

[0030] The online monitoring device for the expansion joint displacement of GIL / GIS equipment is mainly composed of an IoT gateway and a status monitoring sensor. The sensor is transmitted to the IoT gateway via wireless LORA or wired RS485. The IoT gateway is transmitted to the management platform via the internal LAN of the power company. The operation and maintenance personnel can view the real-time operation status of the expansion joint through the intranet.

[0031] In this embodiment, the Internet of Things gateway machine adopts the Linux operating system, which has the advantages of high energy efficiency, low cost, low power consumption, strong data computing capability and control capability; the baseboard interface is rich, the scalability is strong, and the upper communication protocol supports IEC61850, 104 protocol, and standard MODBUS protocol, and can also respond to users' customized private protocol requirements quickly and conveniently.

[0032] The linear displacement sensor 3 can support battery or DC power supply, and transmit to the IoT gateway through wireless LORA or wired RS485. The sensor has high linear accuracy, very smooth micro-linear characteristics, and micron-level repeatability accuracy. It adopts advanced resistance material processing technology, multi-contact precious metal brushes, special sliding brush supports and resistance substrate material selection, as well as a sturdy shell to improve the durability of the product. The structure is compact and beautiful, the service life can reach hundreds of millions of reciprocating motions, and it is easy to install and disassemble.

[0033] The temperature sensor includes a temperature detection unit and a communication unit, which can monitor the ambient temperature changes in the environment in real time and online, and transmit them to the IoT gateway via wireless LORA or wired RS485.

[0034] The linear displacement sensor 3 is mounted on one end of the linear displacement sensor fixing bracket 32 ​​, and a first folded edge 35 is provided on the other end thereof. The first folded edge 35 is fixed on the first mounting plate 12 .

[0035] The first folded edge 35 has a first mounting groove 36 , and the fastening bolt 13 passes through the first flange 11 , the first mounting plate 12 , and the first mounting groove 36 of the first folded edge 35 in sequence to be locked and fixed.

[0036] At least two fixing members 33 are provided on the linear displacement sensor fixing bracket 32 ​​. Each fixing member 33 has a receiving opening. The receiving openings of the two fixing members 33 are arranged opposite to each other. The two ends of the linear displacement sensor 3 are respectively received and fixed by the receiving openings of the two fixing members 33 .

[0037] It also includes a temperature sensor 40, which is fixed on a temperature sensor communication cable 41. The linear displacement sensor fixing bracket 32 ​​has an L-shaped body, one end of which is used to fix the temperature sensor 40 and is close to the pipe wall at the first end of the busbar, and the other end of the L-shaped body is a second folded edge 43, which is fixed on the first flange 11.

[0038] Installation of telescopic joint linear displacement monitoring sensor

[0039] The installation of the telescopic joint linear displacement monitoring sensor is divided into three installation steps:

[0040] Step 1: First, install the telescopic joint linear displacement sensor 3 on the linear displacement sensor fixing bracket 32; then, install the linear displacement sensor fixing bracket 32 ​​on the first mounting plate (Note: do not tighten the screws on the linear displacement sensor fixing bracket 32 ​​first, to facilitate subsequent range debugging);

[0041] Step 2: Fix the busbar monitoring sensor fixing plate 37 to the second end of the GIS busbar through a nut; then pass the telescopic joint displacement monitoring sensor detection rod 38 through the screw hole on the busbar monitoring sensor fixing plate 37 and fix it through the limiter 39. Figure 2 shown.

[0042] Step 3: Adjust the position of the telescopic joint linear displacement sensor through the bracket, loosen the screws of the bracket fixings, adjust the position so that the distance L between the end face of the linear displacement sensor and the end face of the detection rod 38 is about 100 mm. After adjusting the distance L, tighten the screws of the fixings to complete the installation (Note: During installation, pay attention to keep the sensor in a horizontal state and the sensor pull rod can move in and out flexibly).

[0043] Installation of expansion joint temperature sensor

[0044] The installation of the temperature sensor is divided into two installation steps:

[0045] Step 1: Fix the temperature sensor to the temperature sensor fixing bracket 42 with 4 screws;

[0046] Step 2: The temperature sensor fixing bracket 42 is installed and fixed on the fixing piece 33 at the first end of the GIS busbar.

[0047] The above description is only for illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. An online monitoring device for displacement of expansion joints of GIS equipment, comprising: A first end (1) of the busbar, a second end (2) of the busbar, a first mounting plate (12) is installed on a first flange (11) of the first end (1) of the busbar, a second mounting plate (18) is installed on a second flange (19) of the second end (2) of the busbar, a bellows (17) is provided between the first mounting plate (12) and the second mounting plate (18), and the invention is characterized in that it also includes: a linear displacement sensor (3), a body end of which is fixed on a linear displacement sensor fixing bracket (32), and a detection rod (38) of which is fixed on a fixing plate (37), wherein the fixing bracket (32) is fixed on the first mounting plate (12), the fixing plate (37) is fixed on the second mounting plate (18), and an electrical signal of the linear displacement sensor (3) is connected to a displacement monitoring alarm host.

2. The GIS equipment expansion joint displacement online monitoring device according to claim 1 is characterized in that: The linear displacement sensor (3) is mounted on one end of the linear displacement sensor fixing bracket (32), and a first folded edge (35) is provided on the other end, wherein the first folded edge (35) is fixed on the first mounting plate (12).

3. The GIS equipment expansion joint displacement online monitoring device according to claim 2 is characterized in that: The first folded edge (35) has a first mounting groove (36), and the fastening bolt (13) passes through the first flange (11), the first mounting plate (12) and the first mounting groove (36) of the first folded edge (35) in sequence and is locked and fixed.

4. The GIS equipment expansion joint displacement online monitoring device according to claim 2 is characterized in that: At least two fixing members (33) are provided on the linear displacement sensor fixing bracket (32), each fixing member (33) having a receiving opening, the receiving openings of the two fixing members (33) being arranged opposite to each other, and the two ends of the linear displacement sensor (3) are respectively received and fixed by the receiving openings of the two fixing members (33).

5. The online monitoring device for displacement of expansion joints of GIS equipment according to claim 1 is characterized in that: It also includes a temperature sensor (40), which is fixed on a temperature sensor communication cable (41). The linear displacement sensor fixing bracket (32) has an L-shaped body, one end of which is used to fix the temperature sensor (40) and is close to the pipe wall of the first end of the busbar, and the other end of the L-shaped body is a second folded edge (43), which is fixed on the first flange (11).

Images