Foundation settlement monitoring device for gas insulated switchgear

Abstract

The embodiment of the utility model provides a foundation settlement monitoring device for a gas insulated switchgear, a series GIS device comprises a plurality of buttresses, the series GIS device foundation settlement monitoring system comprises a plurality of measuring units, each measuring unit comprises two arm levers, a plurality of connecting rods and a plurality of connecting rods, each measuring unit is arranged between two adjacent buttresses, so that the tail ends of the two arm levers are positioned right above the two adjacent buttresses; the laser displacement meters are arranged at the tail ends of the arm levers to measure the distances from the arm levers to the corresponding buttresses in the vertical direction and send the measured values to the corresponding measuring units; the data receiving and processing module is used for receiving relative settlement of the adjacent buttresses of each measuring unit and calculating relative settlement and absolute settlement of all the buttresses relative to the reference buttress; wherein the relative settlement of the adjacent buttresses is obtained based on measured values of the laser displacement meters on the two sides of each measuring unit. Therefore, effective and accurate GIS equipment foundation settlement monitoring is realized.

Description

Technical Field

[0001] This application relates to the fields of structural testing technology and power equipment monitoring technology, and in particular to a foundation settlement monitoring device for gas-insulated switchgear. Background Technology

[0002] With the widespread use of gas-insulated switchgear (GIS) in substations, its safety and functional maintenance have received increasing attention. In areas with poor geological conditions or prone to natural disasters, the foundations of the equipment may experience localized or overall settlement, potentially leading to abnormal stress or failure of the equipment. Therefore, foundation settlement has a particularly significant impact on equipment safety. GIS equipment is generally composed of multiple sets of components connected in series, each with its own foundation, resulting in a long, strip-like distribution across the site, or a GIS system consisting of multiple independent GIS devices. In monitoring the settlement of GIS equipment foundations, monitoring the relative settlement difference of the individual foundations of each component (or a single GIS device) is more important than monitoring the overall absolute settlement of the GIS equipment.

[0003] Currently, common settlement measurement methods generally involve periodic manual observation using equipment such as levels and total stations. This approach is not only labor-intensive, but also inaccurate and inefficient, and fails to meet the needs of real-time monitoring. Therefore, a more effective and accurate method for monitoring the settlement of GIS equipment foundations is required. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a foundation settlement monitoring device for gas-insulated switchgear, which solves the problem of the lack of effective and accurate monitoring of foundation settlement of various parts (or individual GIS devices) in existing technologies.

[0005] According to an embodiment of this application, a foundation settlement monitoring device for gas-insulated switchgear is provided. The gas-insulated switchgear includes multiple supports. The foundation settlement monitoring device includes: multiple measuring units, each measuring unit including: two booms, and each measuring unit is positioned between two adjacent supports such that the ends of the two booms are directly above the two adjacent supports; a laser displacement meter, positioned at the end of each boom, to measure the vertical distance from the boom to the corresponding support and send the measured value to the corresponding measuring unit; and a data receiving and processing module, receiving the relative settlement of adjacent supports from each measuring unit and calculating the relative and absolute settlement of all supports relative to a reference support; wherein the relative settlement of adjacent supports is obtained based on the measured values ​​of the laser displacement meters on both sides of each measuring unit.

[0006] According to an embodiment of this application, the boom is telescopic.

[0007] According to an embodiment of this application, the boom is telescopic in 5 layers, each layer having a thickness of 0.8 to 1 mm and a length of 0.9 to 1 meter, with a total telescopic range of 1 to 5 meters.

[0008] According to an embodiment of this application, when the distance between adjacent supports is greater than 10 meters, simulated supports are set between adjacent supports.

[0009] According to an embodiment of this application, the boom is a carbon fiber boom, which has the following characteristics: density of 1.75–1.93 g / cm³. 3 Tensile strength: 3500–7000 MPa; Tensile modulus: 230–800 GPa; Elongation at break: 1.5%–2.0%; Thermal conductivity: 5–10 W / (m·K); Electrical conductivity: 10²–10³ S / m.

[0010] According to an embodiment of this application, the measuring unit further includes: a level (6-1), a central rotating shaft (6-2), a metal protective shell (6-3), a connecting rod bearing (6-4), a retractable signal cable (6-6), a retractable power cable (6-7), a metal support rod (6-9), a wireless signal transmission module (6-10), a data acquisition and storage module (6-11), a battery module (6-12), bolt holes for connecting the base (6-13), external connection holes for the signal cable and power cable (6-14), a base (6-15), and a pad (6-16) installed at the point to be measured.

[0011] According to an embodiment of this application, the retractable signal line (6-6) and the retractable power line (6-7) are spiral wires.

[0012] The technical principle of this application is as follows: by setting a measuring unit with a laser displacement meter between two adjacent piers, the relative settlement of the two adjacent piers can be monitored; and by combining the relative settlement of all piers and the reference pier, the relative settlement and absolute settlement of all piers can be obtained.

[0013] Compared with the prior art, this application has the following advantages: by adopting the above-mentioned measurement unit, the relative settlement of each component of the serial GIS equipment can be monitored in real time, and the measurement is more efficient, accurate and convenient, thereby better predicting the possible abnormal stress or failure of the GIS equipment. Attached Figure Description

[0014] Figure 1 This is a diagram showing the arrangement and numbering of the supports and multiple measurement units in the GIS equipment foundation settlement monitoring system according to an embodiment of this application.

[0015] Figure 2 This is a front view of the arrangement of measurement units between two adjacent GIS devices according to an embodiment of this application.

[0016] Figure 3 This is a perspective view of the arrangement of measurement units between two adjacent GIS devices according to an embodiment of this application.

[0017] Figure 4 This is a schematic diagram of the multi-layered ends of the telescopic rod according to an embodiment of this application.

[0018] Figure 5 This is a three-dimensional projection view of the positions of each component of the measurement unit in an embodiment of this application.

[0019] Figure 6 This is a front view of the measurement unit in an embodiment of this application.

[0020] Figure 7 This is a side view of the measurement unit in an embodiment of this application.

[0021] Figure 8 This is a top view of the measuring unit in an embodiment of this application.

[0022] Figure 9 This is a schematic diagram showing the connection between the basic settlement monitoring device, server, and terminal in an embodiment of this application. Detailed Implementation

[0023] The technical solutions in this application will be further described below with reference to the accompanying drawings and embodiments.

[0024] As described in the background section, existing technologies lack effective and accurate methods for monitoring the foundation settlement of various components within GIS equipment. To address this problem, as... Figure 1 As shown, according to one embodiment of this application, a foundation settlement monitoring device for gas-insulated switchgear is provided, wherein the gas-insulated switchgear includes multiple (7, but any number) supports, comprising: multiple measuring units (measuring instruments No. 1 to No. 6), each measuring unit including: two arms, and each measuring unit is disposed between two adjacent supports such that the ends of the two arms are directly above the two adjacent supports; a laser displacement meter disposed at the end of each arm to measure the distance from the arm to the corresponding support in the vertical direction, and transmit the measured value to the corresponding measuring unit; a data receiving and processing module (not shown) to receive the relative settlement of adjacent supports of each measuring unit and calculate the relative settlement and absolute settlement of all supports relative to a reference support; wherein the relative settlement of adjacent supports is obtained based on the measured values ​​of the laser displacement meters on both sides of each measuring unit. Furthermore, Figure 2 (Main view) and Figure 3The (3D view) also shows the setup of two supports, the corresponding GIS equipment 7, and a measuring unit 6. Additionally, the external support angle steel 8 is shown for fixing the supports. By installing a measuring unit with a laser displacement meter between two adjacent supports, the relative settlement of the two adjacent supports can be monitored; combined with the relative settlement of all supports and a reference support, the relative and absolute settlement of all supports can be obtained. By employing the aforementioned measuring unit, the relative settlement of each component of the cascaded GIS equipment can be monitored in real time, making the measurement more efficient, accurate, and convenient, thus better predicting potential abnormal stress or failure of the GIS equipment.

[0025] Furthermore, the principle of laser ranging is used to measure the settlement change of GIS foundations. Compared with the traditional measurement method based on hydrostatic level, laser ranging has higher accuracy (0.1-1μm) for short-distance distance measurement, while the accuracy of hydrostatic level is only 0.01-0.05mm.

[0026] To enable the foundation settlement monitoring system to adapt to measurements from more types of serial GIS equipment, such as Figure 4 As shown in the embodiment of this application, the boom is telescopic. Furthermore, the boom is telescopic in five layers, each layer being 0.8–1 mm thick and 0.9–1 m long, with a total telescopic range of 1–5 meters. Therefore, when the distance between adjacent supports is greater than 10 meters, simulated supports are installed between the adjacent supports.

[0027] Furthermore, to ensure the foundation settlement monitoring system can adapt to various measurement conditions, according to an embodiment of this application, the boom is a carbon fiber boom, which has the following characteristics: density of 1.75–1.93 g / cm³. 3 Tensile strength: 3500–7000 MPa; tensile modulus: 230–800 GPa; elongation at break: 1.5%–2.0%; thermal conductivity: 5–10 W / (m·K); electrical conductivity: 10²–10³ S / m. Carbon fiber is a high-performance fiber material composed of carbon elements, possessing characteristics such as lightweight, high strength, and high modulus. As an inorganic non-metallic material, it also exhibits good rust and corrosion resistance. Compared to traditional hydrostatic levels, it avoids the need for long water pipes and stringent airtightness requirements, significantly reducing manufacturing process requirements and costs.

[0028] According to embodiments of this application, such as Figure 5 (3D view) Figure 6 , Figure 7 and Figure 8As shown, the measuring unit further includes: a level (6-1), a central rotating shaft (6-2), a metal protective shell (6-3), a connecting rod bearing (6-4), a retractable signal cable (6-6), a retractable power cable (6-7), a metal support rod (6-9), a wireless signal transmission module (6-10), a data acquisition and storage module (6-11), a battery module (6-12), bolt holes for connecting the base (6-13), external connection holes for the signal cable and power cable (6-14), a base (6-15), and a shim (6-16) installed at the point to be measured. Wherein, 6-5 indicates the arm, and 6-8 indicates the laser displacement meter. Figure 5 As shown, the retractable signal line (6-6) and the retractable power line (6-7) are spiral wires. Since this measurement unit has a wireless transmission function (wireless signal transmission module 6-10), even if the signal line is damaged and disconnected, the wireless transmission module can still be used to achieve uninterrupted transmission of settlement data.

[0029] In addition, to more conveniently obtain monitoring results, such as Figure 9 As shown in the embodiment of this application, the foundation settlement monitoring device for gas-insulated switchgear is connected to the following devices: a server for receiving the relative and absolute settlements of all supports relative to a reference support obtained by the data receiving and processing module; and a smart terminal for obtaining the relative and absolute settlements of all supports relative to the reference support from the server and providing a display interface. The data receiving and processing module uploads the relative and absolute settlements of all supports relative to the reference support to a cloud-level server (or network server 3), and the server then distributes them to the smart terminal (mobile device 1 or PC device 2). The measuring instrument group 6 comprises the plurality of measuring units. Additionally, a DC power supply system 5 for supplying power to the measuring instrument group 6 and the data processing system 4 is also shown. Generally, the function of a DC power supply system is to provide continuous power to the measuring instrument group and data processing system around the clock. The basic principle is that when the power grid is normally connected, the power grid directly supplies power to the measuring instrument group and data processing system and stores power in the batteries of each instrument. When the connection with the power grid is interrupted, the batteries of each instrument will provide temporary power first. When the interruption time is long, the DC power supply system will start the diesel generator to supply power to the entire system, so as to realize the 24-hour uninterrupted power supply of the monitoring system.

[0030] According to an embodiment of this application, the relative settlement of any pier relative to the reference pier is calculated as follows:

[0031] Z j+2 =C i+1,j+2 -C i+1,j+1 +Z j+1 ,

[0032] Z j+1 =Ci,j+1 -C i,j ,

[0033] Where j represents any measurement unit, numbered starting from 1 from the measurement unit adjacent to the reference support; i represents any laser displacement gauge, numbered starting from 1 from the laser displacement gauge corresponding to the reference support; C i,j This represents the measurement value of the i-th laser displacement meter in the j-th measurement unit, with reference to the relative settlement Z of the pier. j＝1 =0, Z j+1 Z j+2 These represent the relative settlements of the (j+1)th and (j+2)th piers, respectively.

[0034] According to the embodiments of this application, the absolute settlement of any pier is calculated as follows:

[0035] S j+1 =Z j+1 +S j ,

[0036] Among them, S j and S j+1 Let S represent the absolute settlement of the j-th pier and the (j+1)-th pier, respectively. j＝1 The elevation of the reference support pier.

[0037] According to an embodiment of this application, the installation example process of the foundation settlement monitoring device for gas-insulated switchgear is as follows.

[0038] Assuming the substation's GIS equipment is arranged in a straight line along an east-west axis, with six supports, the distance between the central axes of these supports can be either 6m or 12m. In the 12m case, a temporary transfer support needs to be erected between two supports. The settlement monitoring equipment must be installed underground, without creating any obstacles on the surface. Therefore, a measuring instrument group is deployed, connected to a DC power supply system and a data processing system, to monitor the settlement of the substation's GIS equipment foundation. The entire process includes the following steps:

[0039] Step 1: For the GIS equipment group arranged in a straight line, dig a trench 700-1000mm deep and 500-900mm wide along one side of the support pier. First, construct the trench using hollow core concrete, then level it with cement mortar. After leveling, the trench should be 700mm deep and 500mm wide, and covered with tempered glass. This trench is used to arrange and install the monitoring equipment.

[0040] Step 2: Fix one side of the angle steel to the independent support of each GIS equipment to ensure that the angle steel and the support settle together. Install shims on the other side, and fix the shims to the angle steel with 3 M10 bolts. A transfer simulation support is erected between the supports with a span of 12m and shims are installed there. The function of the transfer simulation support is to transfer settlement displacement coordinates; its own settlement does not affect its function. Number each support (including the transfer support) from west to east.

[0041] Step 3: Place the measuring instruments between every two adjacent supports (including intermediate supports) to form a measuring instrument group. The placement should ideally be at the midpoint between two adjacent supports, and the level on the upper part of the measuring instrument should be observed to ensure it is level and stable. See the 3D projection diagram of the measuring instrument arrangement for a 6m span adjacent supports. Figure 5 As shown, see the corresponding front view. Figure 6 As shown. Each surveying instrument is numbered from west to east. See the diagram for the arrangement and numbering of the supports and surveying instrument groups. Figure 1 As shown;

[0042] Step 4: The two arms and the two wall rods of the tensile measuring instrument can rotate a maximum of 60 degrees around the central axis of the measuring instrument so that the laser displacement gauges on both sides are placed directly above the support pad.

[0043] Step 5: Connect the power cord and signal line to each measuring instrument to connect it to the data processing system and turn on the DC power supply system;

[0044] Step 6: After the measuring instrument group, data processing system, and DC power supply system are arranged and installed, start continuously collecting the vertical displacement change C of the support measured by each measuring instrument over time. i,j C i,j This represents the displacement change of the j-th support measured by the i-th measuring instrument. The data acquisition time interval can be set to a range of 0.01 to 1000 seconds.

[0045] Step 7: Represent the relative settlement of the piers by Z, and take a certain pier j (the first pier) as a reference, that is, set Z as... j＝1 =0.

[0046] Step 8: Based on the reference support, calculate the relative settlement Z of all other supports.

[0047] Step 9: By periodically transferring the elevation of the reference support to a geodetic level, the absolute settlement S of the reference support is obtained. j From this, the absolute settlement S of all other supports can be calculated.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications or substitutions should be covered within the scope of the claims of this application.

Claims

1. A foundation settlement monitoring device for gas-insulated switchgear, wherein, The gas-insulated switchgear includes multiple supports, characterized in that the foundation settlement monitoring device includes: Multiple measurement units, each measurement unit including: Two booms, with each measuring unit positioned between two adjacent supports such that the ends of the two booms are directly above the two adjacent supports; Laser displacement gauges are installed at the end of each boom to measure the vertical distance from the boom to the corresponding support and send the measured value to the corresponding measurement unit. The data receiving and processing module receives the relative settlement of adjacent supports of each measurement unit and calculates the relative settlement and absolute settlement of all supports relative to the reference support. The relative settlement between adjacent supports is obtained based on the measurements from laser displacement gauges on both sides of each measurement unit.

2. The foundation settlement monitoring device for gas-insulated switchgear as described in claim 1, characterized in that, The boom is telescopic.

3. The foundation settlement monitoring device for gas-insulated switchgear as described in claim 2, characterized in that, The boom is telescopic in 5 layers, each layer is 0.8 to 1 mm thick and 0.9 to 1 meter long, with a total telescopic range of 1 to 5 meters.

4. The foundation settlement monitoring device for gas-insulated switchgear as described in claim 3, characterized in that, When the distance between adjacent supports is greater than 10 meters, simulated supports are set up between adjacent supports.

5. The foundation settlement monitoring device for gas-insulated switchgear as described in claim 1, characterized in that, The boom is a carbon fiber boom, which has the following characteristics: density, 1.75~1.93g / cm³. 3 Tensile strength: 3500–7000 MPa; Tensile modulus: 230–800 GPa; Elongation at break: 1.5%–2.0%; Thermal conductivity: 5–10 W / (m·K); Electrical conductivity: 10²–10³ S / m.

6. The foundation settlement monitoring device for gas-insulated switchgear as described in claim 1, characterized in that, The measuring unit also includes: a level (6-1), a central rotating shaft (6-2), a metal protective shell (6-3), a connecting rod bearing (6-4), a retractable signal cable (6-6), a retractable power cable (6-7), a metal support rod (6-9), a wireless signal transmission module (6-10), a data acquisition and storage module (6-11), a battery module (6-12), bolt holes for connecting the base (6-13), external connection holes for the signal cable and power cable (6-14), a base (6-15), and a shim (6-16) installed at the point to be measured.

7. A foundation settlement monitoring device for gas-insulated switchgear as described in claim 6, characterized in that, The retractable signal line (6-6) and the retractable power line (6-7) are spiral wires.

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