SF6 electrical equipment multifunctional connection verification device and method

Abstract

The invention provides a multifunctional connection verification device and method for SF6 electrical equipment, and belongs to the field of SF6 electrical equipment. The problem that daily maintenance of existing SF6 electrical equipment is inconvenient is solved. According to the technical scheme, the device comprises a filtering device, one end of the filtering device is connected into an SF6 gas storage tank connector through a first valve and a third valve, and the other end of the filtering device is connected with a micro-water detection connector, a barometer and an SF6 electrical equipment connector through a second valve and a first communication valve in sequence; a fourth valve is arranged on a pipeline connecting the first communication valve and the micro-water detection interface, a second communication valve is arranged between the barometer and the SF6 electrical equipment interface, an air supply adjusting valve is arranged on a pipeline between the second communication valve and the first communication valve, a fifth valve is arranged between the second communication valve and the SF6 electrical equipment interface, and a fourth valve is arranged on a pipeline between the fifth valve and the SF6 electrical equipment interface. The SF6 electrical equipment verification method comprises a gas supply method, a micro-water detection method and a density relay calibration method. The SF6 electrical equipment verification device is applied to SF6 electrical equipment verification.

Description

Technical Field

[0001] The invention provides a multifunctional connection verification device and method for SF6 electrical equipment, belonging to the technical field of SF6 electrical equipment. Background Art

[0002] The maintenance of SF6 electrical equipment mainly includes electrical equipment gas filling, micro-water detection (including electrical equipment micro-water detection and gas tank micro-water detection), density relay calibration, etc. In recent years, with the continuous increase in the number of SF6 electrical equipment put into operation, the daily maintenance of such electrical equipment is particularly important for the stable operation of the power grid. The density relay is a key component that reflects the state of SF6 gas filled in electrical equipment. However, due to the wide variety of electrical equipment manufacturers and models, the design and manufacturing of density relays lack unified specifications and standards, which brings many difficulties to the daily maintenance of SF6 electrical equipment, such as electrical equipment gas filling, gas micro-water, and component detection.

[0003] Therefore, there is an urgent need to manufacture a SF6 electrical equipment calibration device that can conveniently and quickly complete the live detection of GIS electrical equipment and the calibration of density relays of different models.

[0004] In this regard, the Chinese invention patent (CN 105758990 A) proposes a calibration system for the SF6 gas micro-water content detector in GIS, which connects the calibration module at one end of the SF6 gas micro-water detection dedicated gas chamber and the gas replenishment port at the other end, and connects the gas micro-water content adjustment module and the pressure control module at both ends of the SF6 gas micro-water detection dedicated gas chamber to form a loop, so that the calibration system can adjust the moisture in its own gas storage tank, so as to obtain standard data, and by comparing the standard micro-water content measuring instrument with the micro-water detector to be calibrated, the accuracy of the micro-water detector to be calibrated for detecting the micro-water content of SF6 gas is obtained. Although the above technical solution solves the problem of simultaneous gas replenishment, gas moisture content adjustment and the accuracy of the detected SF6 online monitoring instrument in a calibration system, its calibration system is complex and the operation process is cumbersome. Summary of the invention

[0005] In order to solve the technical problem of inconvenient daily maintenance of existing SF6 electrical equipment, the present invention proposes a multifunctional connection verification device and method for SF6 electrical equipment, with the purpose of realizing convenient and quick maintenance of SF6 electrical equipment by improving the hardware structure of the SF6 electrical equipment verification device or improving the combined connection of hardware modules and / or circuits.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: comprising a filter device, one end of which is connected to the SF6 gas storage tank interface through a first valve and a third valve, and the other end of which is connected to a micro-water detection interface, a pressure gauge and an SF6 electrical equipment interface respectively through a second valve and a first connecting valve; A fourth valve is provided on the pipeline connecting the first connecting valve and the micro-water detection interface; A second connecting valve is provided between the pressure gauge and the SF6 electrical equipment interface, and an air supply regulating valve is provided on the pipeline between the second connecting valve and the first connecting valve; A fifth valve is provided between the second connecting valve and the SF6 electrical equipment interface; The SF6 gas storage tank interface is connected to the SF6 gas storage tank, the micro-water detection interface is connected to the micro-water detection device, and the SF6 electrical equipment interface is connected to the SF6 electrical equipment.

[0007] Furthermore, the air supply regulating valve is linked to the air pressure gauge.

[0008] Furthermore, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the SF6 gas tank interface, the micro-water detection interface, the SF6 electrical equipment interface and the pressure gauge are integrated on the same end surface of the carrier board.

[0009] A SF6 electrical equipment calibration method uses a SF6 electrical equipment multifunctional connection calibration device to perform SF6 electrical equipment calibration.

[0010] Furthermore, the SF6 electrical equipment verification method includes an air replenishment method, a trace water detection method and a density relay calibration method.

[0011] Furthermore, the gas replenishment method is: closing the fourth valve, opening the first valve, the second valve and the fifth valve, and the SF6 gas flows from the SF6 gas storage tank to the SF6 electrical equipment.

[0012] Furthermore, the micro-water detection method includes a method for detecting micro-water in gas in an SF6 gas storage tank and a method for detecting micro-water in gas in SF6 electrical equipment.

[0013] Furthermore, the method for performing micro-water detection on the gas in the SF6 gas storage tank is: closing the fifth valve, opening the first valve, the second valve, the third valve and the fourth valve, and the SF6 gas flows from the SF6 gas storage tank to the micro-water detection device for micro-water detection.

[0014] Furthermore, the method for detecting micro-water in the gas in the SF6 electrical equipment is: closing the first valve, the second valve, and the third valve, opening the fourth valve and the fifth valve, and the SF6 gas flows from the SF6 electrical equipment to the micro-water detection device for micro-water detection.

[0015] Furthermore, the method for calibrating the density relay is: close the first valve, the second valve, the third valve, and the fourth valve, open the fifth valve, and the SF6 gas flows from the SF6 electrical equipment to the barometer, and the density relay on the SF6 electrical equipment is calibrated by comparing the pressure value on the barometer.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: 1. The multifunctional connection verification device for SF6 electrical equipment of the present invention integrates the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the SF6 gas tank interface, the micro-water detection interface, the SF6 electrical equipment interface and the barometer on a carrier board, and has a simple structure; the operator only needs to control the on and off of the first valve, the second valve, the third valve, the fourth valve and the fifth valve on the control panel to control the flow direction of SF6 gas and perform SF6 electrical equipment verification, and can conveniently and quickly complete the verification of density relays of different models; compared with the traditional SF6 electrical equipment verification device, the multifunctional connection verification device for SF6 electrical equipment of the present invention integrates the pipelines of various verification work on the same carrier board, and does not need to frequently install and remove the pipelines of various verification equipment. The operation process is convenient and fast, and the operation and maintenance cost is effectively reduced. 2. An air supply regulating valve is provided on the inflation pipe between the second connecting valve and the first connecting valve of the present invention. The air supply regulating valve is linked with the pressure gauge so that in the process of replenishing air to the SF6 electrical equipment, when the gas pressure in the SF6 electrical equipment reaches the set gas pressure, the air supply regulating valve is automatically closed to terminate the air supply, thereby reducing the manual operation steps and improving the accuracy of the air supply, avoiding closure caused by over-inflation or under-inflation, and ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is the system principle diagram of the present invention; Figure 2 It is a front view of the multifunctional connection verification device for SF6 electrical equipment of the present invention; Figure 3 It is a rear view of the multifunctional connection verification device for SF6 electrical equipment of the present invention; Figure 4 This is a schematic diagram of the principle of the present invention when gas is supplied to SF6 electrical equipment; Figure 5This is a schematic diagram of the principle of the present invention when performing micro-water detection on the gas in the SF6 gas storage tank; Figure 6 This is a schematic diagram of the principle of the present invention when detecting trace water in the gas of SF6 electrical equipment; Figure 7 It is a schematic diagram of the principle of calibrating a density relay according to the present invention; DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate relative positions or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] like Figures 1 to 7 As shown, the present invention provides a multifunctional connection verification device for SF6 electrical equipment, including a square shell made of hard plastic, a carrier plate placed in the shell, and a filter device fixedly connected to the carrier plate, the filter device is used to filter impurities in the air and dry moisture in the air, effectively preventing moisture, impurities and other components in the air from entering the inflation device during the inflation process, causing a decrease in gas insulation performance.

[0021] One end of the filter device is connected to the SF6 gas tank interface through the gas charging pipe, and the SF6 gas tank interface is connected to the SF6 gas tank. The gas charging pipe between the filter device and the SF6 gas tank interface is connected with a first valve and a third valve to control the air intake state; the other end of the filter device is connected to the micro-water detection interface, the barometer and the SF6 electrical equipment interface through the second valve and the first connecting valve respectively. The fourth valve is connected to the gas charging pipe connecting the first connecting valve and the micro-water detection interface, and the micro-water detection interface is connected to the micro-water detection device; the second connecting valve is connected to the gas charging pipe between the barometer and the SF6 electrical equipment interface, and the SF6 electrical equipment interface is connected to the SF6 electrical equipment. An air supply regulating valve is arranged on the gas charging pipe between the second connecting valve and the first connecting valve, and a fifth valve is connected to the gas charging pipe connecting the second connecting valve and the SF6 electrical equipment interface.

[0022] The pressure gauge is used to detect the gas pressure in the SF6 electrical equipment. The gas supply regulating valve is linked to the pressure gauge. During the process of supplying gas to the SF6 electrical equipment, when the gas pressure in the SF6 electrical equipment reaches the required pressure (preset gas pressure), the gas supply regulating valve automatically closes to terminate the gas supply. The gas supply regulating valve in this embodiment is a solenoid valve.

[0023] In this embodiment, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the SF6 gas tank interface, the micro-water detection interface and the SF6 electrical equipment interface are integrated on the first end face of the carrier, which is the operator's operation panel. The connection devices such as the gas charging pipe and the filter device are integrated on the second end face of the carrier. The barometer is embedded on the carrier, and the dial of the barometer is placed on the first end face of the carrier to facilitate observation of the air pressure. The remaining equipment of the barometer is placed on the second end face of the carrier. Such a setting can make the operation panel of the carrier clean and tidy. The operator only needs to control the on and off of the first valve, the second valve, the third valve, the fourth valve and the fifth valve on the operation panel to control the flow direction of the SF6 gas and perform SF6 electrical equipment calibration. The operation process is simple and convenient.

[0024] The method of calibrating SF6 electrical equipment using the multifunctional connection calibration device for SF6 electrical equipment includes a gas replenishment method, a micro-water detection method and a density relay calibration method.

[0025] When replenishing SF6 electrical equipment, close the fourth valve, open the first valve, the second valve and the fifth valve, and the SF6 gas flows from the SF6 gas storage tank through the third valve, the first valve, the filter device, the second valve, the first connecting valve, the second connecting valve, the fifth valve and the SF6 electrical equipment interface to the SF6 electrical equipment. When the gas pressure in the SF6 electrical equipment reaches the preset gas pressure value, the gas replenishment regulating valve automatically closes and stops replenishing gas.

[0026] Micro-water detection includes micro-water detection of gas in SF6 gas storage tanks and micro-water detection of gas in SF6 electrical equipment.

[0027] When performing micro-water detection on the gas in the SF6 gas tank, close the fifth valve, open the first valve, the second valve, the third valve and the fourth valve, and the SF6 gas flows from the SF6 gas tank through the third valve, the first valve, the filter device, the second valve, the first connecting valve, the fourth valve and the micro-water detection interface to the micro-water detection device for micro-water detection. When performing micro-water detection on the gas in the SF6 electrical equipment, close the first valve, the second valve and the third valve, open the fourth valve and the fifth valve, and the SF6 gas flows from the SF6 electrical equipment through the second connecting valve, the first connecting valve, the fourth valve and the micro-water detection interface to the micro-water detection device for micro-water detection.

[0028] When calibrating the density relay, close the first valve, the second valve, the third valve, and the fourth valve, and open the fifth valve. The gas flows from the SF6 electrical equipment to the pressure gauge. By observing the pressure value on the pressure gauge, the density relay on the SF6 electrical equipment is calibrated.

[0029] In this embodiment, the material of the carrier plate is aluminum alloy, and the size is 400mmx400mmx5mm. Regarding the size of the carrier plate, those skilled in the art can make adaptive adjustments according to the weight of the equipment used and the installation size of the parts.

[0030] In this embodiment, the diameter of the inflation pipe is 5 mm, and those skilled in the art can make adaptive adjustments according to the required inflation flow and pressure.

[0031] The SF6 gas tank interface, micro-water detection interface and SF6 electrical equipment interface are gas charging connectors, which are fixedly connected to the carrier board. The gas charging pipes connecting various devices can also be connected using gas charging connectors, which is convenient for installation and later maintenance and replacement, such as the first connecting valve and the second connecting valve.

[0032] The first valve, the second valve, the third valve, the fourth valve and the fifth valve are ball valves for controlling the flow direction and on-off of the gas.

[0033] Preferably, the model of the barometer is Y-100Z.

[0034] Those skilled in the art may also add a spare interface and / or a spare switch based on the multifunctional connection verification device for SF6 electrical equipment of the present invention.

[0035] The multifunctional connection verification device for SF6 electrical equipment of the present invention has a simple structure and is easy to operate. The operator can control the flow direction of SF6 gas and verify the SF6 electrical equipment only by controlling the on and off of the first valve, the second valve, the third valve, the fourth valve, and the fifth valve on the control panel. A gas replenishment regulating valve is provided on the gas charging pipeline between the second connecting valve and the first connecting valve. When the gas pressure in the SF6 electrical equipment reaches the set pressure, the gas replenishment regulating valve is automatically closed to terminate the gas replenishment, thereby improving the accuracy of the gas replenishment, avoiding locking caused by excessive or insufficient gas charging, and ensuring personal safety.

[0036] Regarding the specific structure of the present invention, it should be noted that the connection relationship between the various component modules adopted in the present invention is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring about corresponding technical effects, and solve the technical problems raised by the present invention without relying on the execution of corresponding software programs. The components, modules, models of specific components, the connection methods between each other, and the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete, and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional connection verification device for SF6 electrical equipment, characterized in that: It includes a filter device, one end of which is connected to the SF6 gas tank interface through a first valve and a third valve, and the other end of which is connected to a micro-water detection interface, a pressure gauge and an SF6 electrical equipment interface respectively through a second valve and a first connecting valve; A fourth valve is provided on the pipeline connecting the first connecting valve and the micro-water detection interface; A second connecting valve is provided between the pressure gauge and the SF6 electrical equipment interface, and an air supply regulating valve is provided on the pipeline between the second connecting valve and the first connecting valve; A fifth valve is provided between the second connecting valve and the SF6 electrical equipment interface; The SF6 gas storage tank interface is connected to the SF6 gas storage tank, the micro-water detection interface is connected to the micro-water detection device, and the SF6 electrical equipment interface is connected to the SF6 electrical equipment.

2. A multifunctional connection verification device for SF6 electrical equipment according to claim 1, characterized in that: The air supply regulating valve is linked with the air pressure gauge.

3. A multifunctional connection verification device for SF6 electrical equipment according to claim 1, characterized in that: The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the SF6 gas tank interface, the micro-water detection interface, the SF6 electrical equipment interface and the pressure gauge are integrated on the same end surface of the carrier board.

4. A method for calibrating SF6 electrical equipment, comprising: using a multifunctional connection calibration device for SF6 electrical equipment as described in any one of claims 1 to 3 to perform calibration on the SF6 electrical equipment.

5. A SF6 electrical equipment calibration method according to claim 4, characterized in that: The SF6 electrical equipment verification method includes an air replenishment method, a trace water detection method and a density relay calibration method.

6. A SF6 electrical equipment calibration method according to claim 5, characterized in that: The gas replenishment method is: closing the fourth valve, opening the first valve, the second valve and the fifth valve, and the SF6 gas flows from the SF6 gas storage tank to the SF6 electrical equipment.

7. A SF6 electrical equipment calibration method according to claim 5, characterized in that: The micro-water detection method includes a method for detecting micro-water in gas in an SF6 gas storage tank and a method for detecting micro-water in gas in SF6 electrical equipment.

8. A SF6 electrical equipment calibration method according to claim 7, characterized in that: The method for detecting micro-water in the gas in the SF6 gas storage tank is: closing the fifth valve, opening the first valve, the second valve, the third valve and the fourth valve, and the SF6 gas flows from the SF6 gas storage tank to the micro-water detection device for micro-water detection.

9. A SF6 electrical equipment calibration method according to claim 7, characterized in that: The method for detecting micro-water in gas in SF6 electrical equipment is: closing the first valve, the second valve, and the third valve, opening the fourth valve and the fifth valve, and allowing SF6 gas to flow from the SF6 electrical equipment to the micro-water detection device for micro-water detection.

10. A SF6 electrical equipment calibration method according to claim 5, characterized in that: The method for calibrating the density relay is: close the first valve, the second valve, the third valve, and the fourth valve, open the fifth valve, and allow SF6 gas to flow from the SF6 electrical equipment to the barometer. By comparing the pressure value on the barometer, the density relay on the SF6 electrical equipment is calibrated.

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