Device and method for positioning and detecting SF6 leakage and automatically supplementing gas

Abstract

A device and a method for positioning and detecting SF6 leakage and automatically supplementing gas relate to the technical field of GIS equipment protection, and comprise a central processing subsystem, an infrared temperature detection monitor, a pressure measurer and an intelligent switch which are respectively connected with the central processing subsystem, and a gas filling device connected with the intelligent switch, the high-pressure gas collection device and the adsorption device are connected with the inflation pipeline, and the mechanical arm supports the inflation pipeline to move. The invention further discloses a method for integrating the SF6 leakage positioning detection function and the automatic gas supplementing function. On the basis that the internal and external structures of the GIS are not changed, the adsorption device at one end of the gas charging device is used for adsorbing a gas leakage part through positioning so as to prevent continuous gas leakage, the other end of the gas charging device is connected with the SF6 high-pressure gas collection bottle so as to supplement leaked SF6 gas in the GIS in time, and meanwhile, the problems of SF6 gas leakage and gas supplement in the GIS are solved. The device is simple in structure, comprehensive in function and suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS equipment protection, and in particular to a device and method for locating and detecting SF6 leakage and automatically replenishing gas. Background Art

[0002] GIS equipment (gas-insulated, fully enclosed switchgear) is a high-voltage device that uses SF6 gas as its insulating medium. It integrates key components such as circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, and cable terminals into an optimized, integrated system. This combination offers advantages such as compact structure, small footprint, reliable operation, and minimal maintenance. Structurally, GIS equipment utilizes a fully enclosed metal casing filled with SF6 gas. Components are connected via sealed busbars, pipes, and connectors. This design not only ensures safety and reliability but also enables GIS equipment to adapt to a variety of harsh environmental conditions.

[0003] In GIS equipment, SF6 gas plays a vital role. SF6 gas is a non-toxic, tasteless, colorless, odorless, and non-flammable synthetic gas with high electrical strength and excellent interruption performance. It can not only serve as an insulating medium to prevent electrical breakdown between electrical equipment, but also quickly reduce the arc temperature when an arc occurs, achieving rapid arc extinguishing. In addition, the density of SF6 gas also has an important impact on the performance of the equipment. However, during the operation of the GIS equipment, gas leakage may occur, causing the gas density inside the GIS to change, and the internal operation of the GIS may be affected. Therefore, those skilled in the art urgently need to develop a device and method that integrates the positioning and detection of SF6 leakage with the automatic gas replenishment function, which can not only detect the leakage status of the GIS in real time, but also automatically complete the gas replenishment function, while solving the problems of untimely processing, heavy workload, and low efficiency caused by manual processing, as well as the problems of air pollution caused by SF6 leakage and the inability of the GIS to operate normally. Summary of the Invention

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses a device and method for locating and detecting SF6 leakage and automatically replenishing gas.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A device and method for locating and detecting SF6 leakage and automatically replenishing gas, comprising the following steps:

[0007] S1. Set three-dimensional coordinates outside the GIS and upload the temperature information of each coordinate position to the central processing subsystem through the infrared temperature monitoring and detection device;

[0008] S2. Compare the temperature information of each coordinate position received by the central processing subsystem with the preset threshold value, and determine whether there is an air leak at the coordinate point around the GIS based on the data of the internal pressure sensor of the GIS. If so, proceed to step S3; otherwise, return to step S1;

[0009] S3. Obtain the three-dimensional coordinates of the leak location based on the comparison results, and transmit the coordinate information to the robotic arm through the central processing subsystem, so that the robotic arm drives the inflation pipe to move to the corresponding coordinate position;

[0010] S4. Adsorb one end of the inflation pipe to the leaking surface of the GIS according to the three-dimensional positioning coordinates, and turn on the inflation switch of the inflation device through the switch selection controller to automatically replenish SF6 gas through the inflation pipe;

[0011] S5. Place a pressure measuring device inside the GIS and compare the air pressure information received by the central processing subsystem with the preset threshold value. When the pressure is restored or higher than the preset threshold value, the inflation switches at both ends of the inflation pipe are closed by the switch selection controller, and inflation stops.

[0012] Preferably, the threshold value preset in S2 includes:

[0013] The preset ambient temperature is 23±2°C and the gas flow rate in the preset environment is 0-10m / s.

[0014] Preferably, if the comparison result in S2 satisfies the following judgment condition, then the process goes to step S3, otherwise it returns to step S1; the judgment condition is: GIS surface temperature T (x,y,z) ≥45℃, and the gas velocity v in the environment ≥15m / s.

[0015] Preferably, the preset pressure of SF6 in the inflation device in S4 is set to 0.75 MPa.

[0016] Preferably, the preset threshold value of the internal pressure of the GIS in S5 is 0.5-0.7 MPa.

[0017] Preferably, when the comparison result in S5 satisfies the following judgment condition, the inflation is terminated; the judgment condition is 0.6MPa≤P≤0.7MPa‌.

[0018] An apparatus utilizing a positioning method for detecting SF6 leakage and automatically replenishing gas comprises: a central processing system and a gas replenishing device; wherein the central processing system comprises a central processing subsystem, an infrared temperature detection system, a pressure measuring device, and an intelligent switch, each of which is signal-connected to the central processing subsystem; the gas replenishing device comprises an inflation device, the inflation device being connected to an inflation pipe, the other end of which is connected to a suction device; the suction device and the inflation pipe being mounted on a robotic arm; the robotic arm driving the suction device and the inflation pipe to move; and intelligent switches being mounted at both ends of the inflation pipe.

[0019] Among them, the infrared temperature detection system is used to monitor and detect the temperature of various parts and transmit the temperature information to the central processing subsystem; the central processing subsystem is used to receive the temperature information detected by the infrared temperature detection system, and determine whether the temperature value is higher than the preset threshold and determine the specific coordinate information of the temperature anomaly point, and transmit the information to the robotic arm; the pressure measuring device is used to detect the pressure information of various parts inside the GIS in real time and upload it to the central processing subsystem; the central processing subsystem receives the pressure information of the pressure measuring device, and determines whether it reaches the preset pressure threshold of the GIS, and controls the on and off of the intelligent switch.

[0020] Preferably, the adsorption device has a suction cup-shaped structure, and the adsorption end is made of soft material, which can fully fit the outside of the GIS to prevent gas leakage.

[0021] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

[0022] (1) The present invention sets a three-dimensional coordinate system outside the GIS, uses an infrared temperature monitoring and detection device to collect temperature data of each coordinate point and transmits it to the central processing subsystem, and then compares the temperature information with the preset threshold (the preset ambient temperature is 23±2℃, the gas flow rate range in the preset environment is 0-10m / s, and when the GIS surface temperature T （x,y,z） Leakage is determined when the temperature is ≥45℃ and the gas flow rate v is ≥15m / s in the environment). At the same time, the data of the GIS internal pressure sensor is combined to judge the leakage situation. This realizes the accurate judgment of the leakage phenomenon around the GIS, effectively improves the accuracy and reliability of leakage detection, avoids the misjudgment caused by single factor judgment, and provides a solid foundation for subsequent gas replenishment operations.

[0023] (2) Based on the three-dimensional coordinates of the leakage position obtained by comparison, the central processing subsystem of the present invention transmits the coordinate information to the robotic arm, prompting the robotic arm to drive the inflation pipe to move to the corresponding coordinate position, and ensure that the deviation of the adsorption center of the inflation pipe compared to the leakage coordinate position is controlled within ±2 cm, thereby achieving accurate positioning of the leakage position, greatly improving the pertinence and effectiveness of the gas replenishment operation, reducing the gas replenishment failure or resource waste caused by inaccurate positioning, and ensuring the normal operation of the GIS equipment.

[0024] (3) The present invention makes one end of the inflation pipe adsorb on the leaking surface of GIS according to the three-dimensional coordinates after positioning, and uses the switch selection controller to turn on the inflation switch of the inflation device (the preset pressure of SF6 in the inflation device is 0.75MPa), so that SF6 gas can be automatically replenished through the inflation pipe. The entire inflation process does not require manual operation, which greatly reduces the cost of manual intervention and operational risks, improves the timeliness and efficiency of gas replenishment, ensures that the GIS equipment can be quickly repaired when a leak occurs, reduces equipment downtime, and improves the availability and reliability of the equipment.

[0025] (4) The present invention arranges a pressure measuring device inside the GIS. The central processing subsystem receives the air pressure information transmitted by the pressure measuring device and compares it with a preset threshold value (the preset threshold value range of the internal pressure of the GIS is 0.5-0.7 MPa). When the pressure inside the GIS recovers or exceeds the preset threshold value, the switch selection controller closes the inflation switches at both ends of the inflation pipe to stop the inflation operation, thereby achieving precise control of the air replenishment process, avoiding excessive or insufficient air replenishment, effectively protecting the air pressure balance inside the GIS equipment, extending the service life of the equipment, and also improving the safety and stability of the air replenishment operation.

[0026] (5) The central processing system of the present invention covers a central processing subsystem, an infrared temperature detection system, a pressure measuring device and an intelligent switch. The gas supply device includes an inflation device, an inflation pipe, an adsorption device and a robotic arm, etc. The various parts form a signal connection and cooperate with each other to form a complete and efficient automation system, which greatly improves the systematization and intelligence level of the entire SF6 leakage detection and gas supply work, improves work efficiency, reduces the risk of manual operation errors, and provides a strong guarantee for the safe and stable operation of GIS equipment.

[0027] (6) The infrared temperature detection system of the present invention can monitor and detect the temperature conditions of various parts of the GIS in real time, and transmit the temperature information to the central processing subsystem. The central processing subsystem determines whether the temperature value exceeds the preset threshold value based on the information, and then determines the specific coordinate information of the temperature anomaly point, and transmits the information to the robotic arm. The robotic arm drives the adsorption device and the inflation pipe to move, thereby realizing the rapid positioning and response to the temperature anomaly point of the GIS equipment, further enhancing the monitoring capability of the equipment operation status, helping to timely discover potential fault hazards, take measures for maintenance and repair in advance, and reduce the equipment failure rate.

[0028] (7) The pressure measuring device of the present invention detects the pressure information of various parts inside the GIS in real time and uploads it to the central processing subsystem. After receiving the pressure information, the central processing subsystem determines whether the pressure threshold preset by the GIS is reached, and controls the on and off state of the intelligent switch at the same time. This real-time monitoring and automatic control function enables the entire air replenishment process to be dynamically adjusted according to the actual pressure conditions inside the GIS, ensuring the scientificity and rationality of the air replenishment operation, improving the stability and safety of the equipment operation, and reducing equipment failures and safety accidents caused by abnormal pressure.

[0029] (8) The intelligent switches installed at both ends of the gas filling pipe of the present invention can be opened or closed promptly and accurately according to the instructions of the central processing subsystem during the gas filling process, effectively controlling the flow direction and flow of SF6 gas, avoiding gas leakage and waste, and also improving the safety and reliability of the gas filling operation, providing a strong guarantee for the stable operation of the entire SF6 leakage detection and automatic gas filling system, and reducing the system operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flow chart of the method of the present invention;

[0031] Figure 2 is a schematic diagram of the device of the present invention;

[0032] Figure 3 A schematic diagram of the central processing system.

[0033] In the figure: 1. Central processing subsystem; 2. Infrared detection system; 3. Pressure measuring device; 4. Intelligent switch; 5. Inflating device; 6. Inflating pipe; 7. Adsorption device; 8. Robotic arm. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0036] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0037] Example 1:

[0038] Combined with attachment Figures 1 to 3 A device and method for locating and detecting SF6 leakage and automatically replenishing gas, comprising the following steps:

[0039] In step S1, a three-dimensional coordinate system is set outside the GIS (gas insulated switchgear), and an infrared temperature monitoring and detection device is used to collect temperature data of each coordinate point, and the temperature information is transmitted to the central processing subsystem.

[0040] In step S2, the central processing subsystem compares the received temperature information of each coordinate position with the preset threshold value, and combines the data provided by the internal pressure sensor of the GIS to determine whether there is a gas leak at the coordinate point around the GIS. If it is judged to be a gas leak, it proceeds to step S3; otherwise, it returns to step S1 and retests. The preset threshold values ​​here include: the preset ambient temperature is 23±2℃, and the gas flow rate range in the preset environment is 0-10m / s. When the comparison result meets the following conditions, that is, the GIS surface temperature T （x,y,z） ≥45℃, and the gas flow rate v in the environment ≥15m / s, then go to step S3; otherwise, still return to step S1.

[0041] In step S3, based on the three-dimensional coordinates of the leak location obtained through comparison, the central processing subsystem transmits these coordinates to the robotic arm, prompting it to move the inflation tube to the corresponding coordinate position. During this process, the deviation between the center of the inflation tube's suction circle and the leak coordinate position must be within ±2 cm, ensuring precise positioning of the leak.

[0042] In step S4, one end of the inflation pipe is attached to the leaking surface of the GIS according to the three-dimensional coordinates obtained. The switch selection controller activates the inflation switch of the inflation device, allowing SF6 gas to automatically flow through the inflation pipe. The preset SF6 pressure in the inflation device is set to 0.75 MPa.

[0043] In step S5, a pressure meter is placed inside the GIS. The central processing subsystem receives the air pressure information from the meter and compares it with a preset threshold. When the pressure inside the GIS recovers or exceeds the preset threshold, the switch selection controller closes the inflation switches at both ends of the inflation pipe, halting the inflation operation. The preset threshold range for the GIS internal pressure is 0.5-0.7 MPa.

[0044] Devices using this positioning detection SF6 leakage and automatic gas replenishment method, such as Figure 2 As shown, it includes a central processing system and an air supply device. The central processing system includes a central processing subsystem 1, an infrared temperature detection system 2, a pressure measuring device 3, and an intelligent switch 4, each of which is signal-connected to the central processing subsystem 1. The air supply device includes an air charging device 5, which is connected to an air charging pipe 6. The other end of the air charging pipe 6 is connected to an adsorption device 7. The adsorption device 7 and the air charging pipe 6 are mounted on a robotic arm 8, which drives the adsorption device 7 and the air charging pipe 6 to move. Intelligent switches 4 are installed at both ends of the air charging pipe 6.

[0045] like Figure 3 As shown, the infrared temperature detection system 2 monitors the temperature of various parts of the GIS and transmits this information to the central processing subsystem 1. After receiving the temperature information detected by the infrared temperature detection system 2, the central processing subsystem 1 determines whether the temperature exceeds a preset threshold, then determines the specific coordinates of the temperature anomaly point and transmits this information to the robotic arm 8, which then moves the adsorption device 7 and the inflation pipe 6. The pressure measuring device 3 is responsible for real-time pressure measurement at various locations within the GIS and transmits this information to the central processing subsystem 1. Upon receiving the pressure information from the pressure measuring device 3, the central processing subsystem 1 determines whether the pressure reaches the preset GIS pressure threshold and controls the on / off state of the intelligent switch 4.

[0046] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A method for locating and detecting SF6 leakage and automatically replenishing gas, characterized in that: The following steps are involved: S1. Set three-dimensional coordinates outside the GIS and upload the temperature information of each coordinate position to the central processing subsystem through the infrared temperature monitoring and detection device; S2. Compare the temperature information of each coordinate position received by the central processing subsystem with the preset threshold value, and determine whether there is an air leak at the coordinate point around the GIS based on the data of the internal pressure sensor of the GIS. If so, proceed to step S3; otherwise, return to step S1; S3. Obtain the three-dimensional coordinates of the leak location based on the comparison results, and transmit the coordinate information to the robotic arm through the central processing subsystem, so that the robotic arm drives the inflation pipe to move to the corresponding coordinate position; S4. Adsorb one end of the inflation pipe to the leaking surface of the GIS according to the three-dimensional positioning coordinates, and turn on the inflation switch of the inflation device through the switch selection controller to automatically replenish SF6 gas through the inflation pipe; S5. Place a pressure measuring device inside the GIS and compare the air pressure information received by the central processing subsystem with the preset threshold value. When the pressure is restored or higher than the preset threshold value, the inflation switches at both ends of the inflation pipe are closed by the switch selection controller, and inflation stops.

2. The method for positioning, detecting SF6 leakage and automatically replenishing gas according to claim 1, characterized in that: The thresholds preset in S2 include: The preset ambient temperature is 23±2°C and the gas flow rate in the preset environment is 0-10m / s.

3. The method for positioning, detecting SF6 leakage and automatically replenishing gas according to claim 1, characterized in that: If the comparison result in S2 satisfies the following judgment conditions, then go to step S3, otherwise return to step S1; the judgment conditions are: GIS surface temperature T (x,y,z) ≥45℃, and the gas velocity v in the environment ≥15m / s.

4. The method for locating, detecting, and automatically replenishing SF6 gas according to claim 1, wherein: The preset pressure of SF6 in the inflation device in S4 is set to 0.75 MPa.

5. The method for locating, detecting, and automatically replenishing SF6 gas according to claim 1, wherein: The preset threshold value of the internal pressure of the GIS in S5 is 0.5-0.7 MPa.

6. The method for positioning, detecting SF6 leakage and automatically replenishing gas according to claim 1 or 5, characterized in that: When the comparison result in S5 satisfies the following judgment condition, the inflation is terminated; the judgment condition is 0.6 MPa≤P≤0.7 MPa‌.

7. The device for positioning and detecting SF6 leakage and automatically replenishing gas according to claim 1 is characterized in that: include: A central processing system and an air supply device; wherein the central processing system comprises a central processing subsystem (1), an infrared temperature detection system (2), a pressure measuring device (3), and an intelligent switch (4) respectively connected to the central processing subsystem (1) by signal; the air supply device comprises an air filling device (5), the air filling device (5) is connected to an air filling pipe (6), and the other end of the air filling pipe (6) is connected to an adsorption device (7); the adsorption device (7) and the air filling pipe (6) are mounted on a robotic arm (8); the adsorption device (7) and the air filling pipe (6) are driven to move by the robotic arm (8); and intelligent switches (4) are mounted at both ends of the air filling pipe (6); The infrared temperature detection system (2) is used to monitor and detect the temperature of each part and transmit the temperature information to the central processing subsystem (1); the central processing subsystem (1) is used to receive the temperature information detected by the infrared temperature detection system (2), and determine whether the temperature value is higher than a preset threshold value and determine the specific coordinate information of the temperature abnormality point, and transmit the information to the mechanical arm (8); the pressure measuring device (3) is used to detect the pressure information of each part inside the GIS in real time and upload it to the central processing subsystem (1); the central processing subsystem (1) receives the pressure information of the pressure measuring device (3), and determines whether it reaches the preset pressure threshold value of the GIS, and controls the on and off of the intelligent switch (4).

8. The device for positioning, detecting SF6 leakage and automatically replenishing gas according to claim 7, characterized in that: The adsorption device (7) has a suction cup-shaped structure, and the adsorption end is made of soft material, which can fully fit the outside of the GIS to prevent gas leakage.

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