Casing pipe on-line monitoring equipment

Abstract

The utility model relates to the technical field of monitoring equipment, and discloses on-line casing monitoring equipment which comprises a cement base, one end of a stand column is fixedly mounted on the cement base, the on-line casing monitoring equipment further comprises a three-head mounting column, the other end of the stand column is fixedly provided with the three-head mounting column, and the other end of the stand column is fixedly provided with the three-head mounting column. And a mounting block is fixedly mounted on the three-head mounting column. According to the on-line monitoring equipment for the bushing, in order to avoid equipment fault expansion of the device, through cooperative work of the high-frequency local sensor, the voiceprint sensor and the wireless temperature sensor, a partial discharge signal, acoustic-magnetic delay data and surface temperature information of the high-voltage bushing are collected in real time, a frequency band of 100 kHz to 30 MHz and a dynamic range of 29 dBA to 140 dB are covered, and the high-voltage bushing can be monitored in real time. The detection sensitivity of insulation defects, cable joint faults and temperature rise abnormity is remarkably improved, the distance of fault points is accurately judged by combining a voiceprint high-frequency joint detection principle and utilizing an acoustic magnetic delay value, and the fault positioning error is smaller than 1 meter.

Description

Technical Field

[0001] This utility model relates to the field of monitoring equipment technology, specifically to an online monitoring device for casing. Background Technology

[0002] The bushing online monitoring system is a comprehensive system that uses a variety of advanced technologies to monitor the operating status of gas-insulated metal-enclosed switchgear in real time and comprehensively.

[0003] It monitors the temperature, partial discharge, and current of equipment in real time, thereby achieving accurate assessment of equipment operating status, fault early warning, and intelligent diagnosis, ensuring the safe and reliable operation of the power system. It collects the sound waves generated by the equipment during operation through high-frequency acoustic fingerprint joint detection, and monitors the temperature, partial discharge, and current of the equipment in real time, ensuring a comprehensive understanding of the equipment status.

[0004] However, in actual use, most existing bushing online monitoring devices cannot cover a sufficiently wide detection frequency band and cannot effectively capture specific frequency signals generated by some insulation defects, resulting in the inability to detect some early and weak ground discharge signals, making it difficult to detect potential faults in advance. In view of this, we propose a bushing online monitoring device. Utility Model Content

[0005] The purpose of this invention is to provide an online monitoring device for casings to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A casing online monitoring device includes a cement base, on which one end of a column is fixedly installed, and further includes:

[0008] A three-headed mounting column is fixedly installed at the other end of the column. A mounting block is fixedly installed on the three-headed mounting column. A mounting base is fixedly installed on the mounting block. One end of a bottom round tube is fixedly installed on the mounting base.

[0009] A high-pressure bushing, wherein one end of the high-pressure bushing is fixedly installed at the other end of the bottom round tube, one end of the top round tube is fixedly installed at the other end of the high-pressure bushing, a connecting plate is fixedly installed at the other end of the top round tube, and a connecting bracket is fixedly installed on the connecting plate. Multiple sets of mounting base, bottom round tube, high-pressure bushing, top round tube, connecting plate and connecting bracket are provided.

[0010] A bottom mounting ring is fixedly mounted on the bottom circular tube. A high-frequency local sensor and a voiceprint sensor are fixedly mounted on the bottom mounting ring. A top mounting ring is fixedly mounted on the top circular tube. A temperature sensor is fixedly mounted on the top mounting ring. Multiple sets of the bottom mounting ring, high-frequency local sensor, voiceprint sensor, top mounting ring, and temperature sensor are provided.

[0011] Preferably, the high-frequency local sensor is a sensor based on a Rogowski coil structure, sleeved on the grounding wire at the end of the high-voltage bushing, with a detection frequency band of 500kHz-30MHz and a sensitivity of 1pC. The acoustic signature sensor has a sensitivity of 11.2mV / Pa and a dynamic range of 29dBA-140dB. It is fixed to the bottom mounting ring by adsorption or adhesive through a permanent magnet and is used to detect the acousto-magnetic delay signal of cable joint faults.

[0012] Preferably, the temperature sensor is a wireless sensor, including a temperature probe, a data processing module and a wireless communication unit, which monitors the surface temperature of the high-voltage bushing in real time and transmits it to the monitoring unit via wireless signal. The bottom mounting ring and the top mounting ring are both split structures, including a fixed shell and a movable shell, which are hinged by hinges and locked with screws to accommodate round pipes of different diameters.

[0013] Preferably, the mounting block integrates a monitoring unit that supports RS485 and fiber optic communication, connects to the backend host using HTTP / HTTPS protocol, achieves data interaction through a RESTful interface, supports cloud integration and remote access, and has a built-in filtering circuit to filter out 50Hz power frequency interference in high-frequency local sensor signals and display discharge quantity, temperature and acoustic data in real time.

[0014] Preferably, the insulation structure of the high-voltage bushing is a multi-layer capacitor screen design, and the grounding circuit of the end screen is connected to the monitoring unit through a 50Ω coaxial cable. The coaxial cable has an IP65 protection rating. An expansion interface is reserved on the connection frame to support access to the substation integrated automation system or additional sensor modules.

[0015] Preferably, the device also includes a remote monitoring platform that displays partial discharge PRPS graphs, PRPD graphs, and historical data curves in real time via a web page or mobile terminal. The platform supports multi-level early warning threshold settings, remote opening and closing operations, and automatic report generation. The report content covers monitoring data statistics, fault analysis, and equipment status evaluation.

[0016] Compared with the prior art, this utility model provides an online monitoring device for casing, which has the following features:

[0017] Beneficial effects:

[0018] 1. This bushing online monitoring device, in order to prevent the device from escalating equipment failures, uses the collaborative work of a high-frequency local sensor, an acoustic fingerprint sensor, and a wireless temperature sensor to collect in real time the partial discharge signal, acousto-magnetic delay data, and surface temperature information of the high-voltage bushing. It covers the frequency band of 100kHz-30MHz and the dynamic range of 29dBA-140dB, which significantly improves the detection sensitivity of insulation defects, cable joint faults, and abnormal temperature rise. Combined with the high-frequency acoustic fingerprint joint detection principle, it uses the acousto-magnetic delay value to accurately determine the distance to the fault point, achieving a fault location error of less than 1 meter.

[0019] 2. To meet the diverse needs of intelligent upgrades in power equipment, this bushing online monitoring device adopts HTTP / HTTPS protocol and RESTful interface design, supporting seamless integration with the cloud platform. This enables remote real-time access and cross-platform sharing of monitoring data, improving data interaction efficiency. The split installation ring structure is adaptable to circular pipes of different diameters. Combined with reserved expansion interfaces, it can be directly connected to the substation integrated automation system or expanded with additional sensor modules, reducing system expansion costs and meeting the diverse needs of intelligent upgrades in power equipment. Attached Figure Description

[0020] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a second-view perspective three-dimensional schematic diagram of part of the structure of this utility model;

[0022] Figure 3 This is a three-dimensional schematic diagram of part of the structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the capacitor bushing insulation structure of this utility model;

[0024] Figure 5 This is a network architecture diagram of the present invention.

[0025] In the diagram: 1. Cement base; 2. Column; 31. Three-headed mounting column; 32. Mounting block; 33. Mounting seat; 34. Bottom round tube; 35. High-pressure sleeve; 36. Top round tube; 37. Connecting plate; 38. Connecting frame; 41. Bottom mounting ring; 42. High-frequency local sensor; 43. Acoustic sensor; 44. Top mounting ring; 45. Temperature sensor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0028] Please see Figure 1 - Figure 5 This utility model provides a technical solution:

[0029] A casing online monitoring device includes a cement base 1, on which one end of a column 2 is fixedly installed.

[0030] In one embodiment of this utility model, a three-headed mounting column 31 is fixedly mounted on the other end of the column 2. A mounting block 32 is fixedly mounted on the three-headed mounting column 31, and a mounting base 33 is fixedly mounted on the mounting block 32. One end of a bottom round tube 34 is fixedly mounted on the mounting base 33, and one end of a high-pressure sleeve 35 is fixedly mounted on the other end of the bottom round tube 34. One end of a top round tube 36 is fixedly mounted on the other end of the high-pressure sleeve 35, and a connecting plate 37 is fixedly mounted on the other end of the top round tube 36. A connecting bracket 38 is fixedly mounted on the connecting plate 37. Multiple sets of mounting base 33, bottom round tube 34, high-pressure sleeve 35, top round tube 36, connecting plate 37, and connecting bracket 38 are provided. A bottom mounting ring 41 is fixedly mounted on the bottom round tube 34, and a high-frequency local sensor 42 and a voiceprint sensor 43 are fixedly mounted on the bottom mounting ring 41. A top mounting ring 44 is fixedly mounted on the top round tube 36, and a [missing information - likely a device or component] is fixedly mounted on the top mounting ring 44. The system includes multiple sets of components: a temperature sensor 45, a bottom mounting ring 41, a high-frequency local sensor 42, an acoustic fingerprint sensor 43, and a top mounting ring 44. The high-frequency local sensor 42 is a sensor based on a Rogowski coil structure, fitted onto the grounding wire of the end screen of the high-voltage bushing 35. Its detection frequency band is 500kHz-30MHz, and its sensitivity is 1pC. The acoustic fingerprint sensor 43 has a sensitivity of 11.2mV / Pa and a dynamic range of 29dBA-140dB. It is fixed to the bottom mounting ring 41 by adsorption with a permanent magnet or adhesive, and is used to detect the acoustomagnetic delay signal of cable joint faults. The temperature sensor 45 is a wireless sensor, including a temperature probe, a data processing module, and a wireless communication unit. It monitors the surface temperature of the high-voltage bushing 35 in real time and transmits the signal wirelessly to the monitoring unit. Both the bottom mounting ring 41 and the top mounting ring 44 are split structures, including a fixed shell and a movable shell, which are hinged and locked with screws to accommodate round pipes of different diameters.

[0031] In this embodiment, the system uses a cement base 1 as a fixed foundation. A three-headed mounting column 31 is vertically supported by a column 2. Its three branches connect to a mounting block 32, a mounting base 33, and a bottom circular tube 34, respectively. A high-voltage bushing 35 is sealed to the bottom circular tube 34 and the top circular tube 36 via a flange, forming a continuous conductive path. Its end grounding circuit is connected to the monitoring unit via a 50Ω coaxial cable. A high-frequency local sensor 42, based on a Rogowski coil structure, is fitted onto the grounding wire of the end screen of the high-voltage bushing 35. It captures high-frequency pulse currents in the 500kHz-30MHz frequency band through electromagnetic induction. The signal is amplified by a preamplifier and then filtered by a filter circuit. 50Hz power frequency interference and high-frequency noise are transmitted to the monitoring unit after highlighting the discharge characteristics. The acoustic fingerprint sensor 43 is fixed to the bottom mounting ring 41 by a permanent magnet or adhesive, with a dynamic range of 29dBA-140dB, to detect the acoustic fingerprint signal generated when the cable joint is faulty. Combined with the magnetic field signal of the high-frequency local sensor 42, the fault location error is calculated by the acoustic-magnetic delay value to achieve a fault location error of <1 meter. The temperature sensor 45 wirelessly monitors the surface temperature of the high-voltage bushing 35 through the top mounting ring 44. Its built-in temperature probe collects data, which is converted into a digital signal by the data processing module and transmitted to the monitoring unit through the wireless communication module to provide real-time early warning of abnormal temperature rise.

[0032] In one embodiment of this utility model, the mounting block 32 integrates a monitoring unit that supports RS485 and fiber optic communication. It connects to the backend host using the ModBus-RTU / TCP protocol. The monitoring unit has a built-in filter circuit to filter out 50Hz power frequency interference in the signal from the high-frequency local sensor 42 and displays discharge quantity, temperature, and acoustic data in real time. The insulation structure of the high-voltage bushing 35 is a multi-layer capacitor screen design. The grounding circuit of the end screen is connected to the monitoring unit through a 50Ω coaxial cable with an IP65 protection rating. An expansion interface is reserved on the connecting frame 38 to support access to the substation integrated automation system or additional sensor modules. The equipment also includes a remote monitoring platform that displays partial discharge PRPS diagrams, PRPD diagrams, and historical data curves in real time via a web page or mobile terminal. The platform supports multi-level early warning threshold settings, remote opening and closing operations, and automatic report generation. The report content covers monitoring data statistics, fault analysis, and equipment status evaluation.

[0033] In this embodiment, the monitoring unit is integrated within mounting block 32, supporting RS485 and fiber optic communication. It connects to the backend host using the ModBus-RTU / TCP protocol. The monitoring unit's built-in filter circuit performs secondary optimization on the high-frequency signal, extracting key parameters such as discharge current amplitude, pulse width, and repetition frequency. Discharge quantity, temperature, and acoustic signature data are displayed in real-time via an SMA50Ω impedance matching interface. Connector 38 has a reserved RS485 expansion interface, allowing direct connection to the substation integrated automation system or additional sensor modules for multi-system data sharing. The remote monitoring platform displays partial discharge PRPS and PRPD diagrams in real-time via a web page or mobile terminal, intuitively reflecting the discharge phase distribution and statistical characteristics. The historical data module supports generating discharge, temperature, and acoustic signature data curves along a time axis to assist in fault tracing and trend analysis. The platform sets multi-level early warning thresholds, such as triggering a level one alarm when the discharge is >100pC and a level two alarm when it is >500pC. Combined with the acoustic-magnetic delay positioning results, the early warning information is pushed to the maintenance personnel's terminal, reducing the response time by more than 30%. At the same time, the platform supports remote opening and closing operations and automatic report generation. Daily and monthly reports cover monitoring data statistics, equipment status evaluation, and fault analysis reports, and support printing and archiving. Through HTTP / HTTPS protocol and RESTful interface, the system seamlessly connects with the power Internet of Things platform to achieve cross-platform data interaction and cloud storage.

[0034] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. The machinery, parts and equipment are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A casing online monitoring device, comprising a cement base (1), wherein a column (2) is fixedly installed on one end of the cement base (1), characterized in that, Also includes: A three-headed mounting column (31) is fixedly installed at the other end of the column (2). A mounting block (32) is fixedly installed on the three-headed mounting column (31). A mounting seat (33) is fixedly installed on the mounting block (32). One end of a bottom round tube (34) is fixedly installed on the mounting seat (33). A high-pressure bushing (35) is provided, with one end of the high-pressure bushing (35) fixedly installed at the other end of the bottom round tube (34), and one end of the top round tube (36) fixedly installed at the other end of the high-pressure bushing (35). A connecting plate (37) is fixedly installed at the other end of the top round tube (36), and a connecting bracket (38) is fixedly installed on the connecting plate (37). Multiple sets of mounting base (33), bottom round tube (34), high-pressure bushing (35), top round tube (36), connecting plate (37) and connecting bracket (38) are provided. A bottom mounting ring (41) is fixedly mounted on the bottom circular tube (34). A high-frequency local sensor (42) is fixedly mounted on the bottom mounting ring (41). A voiceprint sensor (43) is fixedly mounted on the bottom mounting ring (41). A top mounting ring (44) is fixedly mounted on the top circular tube (36). A temperature sensor (45) is fixedly mounted on the top mounting ring (44). Multiple sets of the bottom mounting ring (41), high-frequency local sensor (42), voiceprint sensor (43), top mounting ring (44), and temperature sensor (45) are provided.

2. The casing online monitoring device according to claim 1, characterized in that: The high-frequency local sensor (42) is a sensor based on a Rogowski coil structure and is mounted on the grounding line of the end screen of the high-voltage bushing (35).

3. The casing online monitoring device according to claim 1, characterized in that: The temperature sensor (45) is a wireless sensor, which includes a temperature probe, a data processing module and a wireless communication unit. It monitors the surface temperature of the high-voltage bushing (35) in real time and transmits it to the monitoring unit via wireless signal. The bottom mounting ring (41) and the top mounting ring (44) are both split structures, which include a fixed shell and a movable shell.

4. The casing online monitoring device according to claim 1, characterized in that: The mounting block (32) integrates a monitoring unit, supports RS485 and fiber optic communication, connects to the backend host using HTTP / HTTPS protocol, realizes data interaction through RESTful interface, supports cloud integration and remote access, and the monitoring unit has a built-in filter circuit.

5. The casing online monitoring device according to claim 1, characterized in that: The high-voltage bushing (35) has a multi-layer capacitor screen insulation structure. The end screen grounding circuit is connected to the monitoring unit through a 50Ω coaxial cable. The coaxial cable has an IP65 protection rating. An expansion interface is reserved on the connecting frame (38).

6. The casing online monitoring device according to claim 1, characterized in that: The device also includes a remote monitoring platform that displays partial discharge PRPS graphs, PRPD graphs, and historical data curves in real time via a web page or mobile terminal. The platform supports multi-level early warning threshold settings, remote opening and closing operations, and automatic report generation.

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