Gas valve measuring apparatus, gas valve measuring system including the same, and gas valve measuring method using the same

Abstract

The present invention provides a gas valve measuring device capable of verifying whether a gas valve is open or closed and whether a measuring device is properly connected to the gas valve, a gas valve measuring system including the same, and a gas valve measuring method using the same. The gas valve measuring device is connected to a gas valve module comprising a gas valve that extends in one direction and through which gas flows, and a handle that rotates to open or close the gas valve, thereby enabling verification of whether the gas valve is open or closed. The gas valve measuring device includes i) a housing unit detachably connected to the gas valve, ii) a magnetic body positioned adjacent to the handle, and iii) a sensor unit comprising a sensor portion positioned in the housing unit and operated depending on whether the magnetic body is positioned adjacently. The sensor portion confirms that the gas valve is open when the magnetic body is rotated by the handle so as to be adjacent to the sensor portion. The sensor portion confirms that the gas valve is closed when the magnetic body is rotated by the handle so as to be separated from the sensor portion.

Description

Technology Field

[0001] The present invention relates to a gas valve measuring device, a gas valve measuring system including the same, and a gas valve measuring method using the same. More specifically, the present invention relates to a gas valve measuring device capable of verifying whether a gas valve is open or closed and whether a measuring device is properly connected to the gas valve, a gas valve measuring system including the same, and a gas valve measuring method using the same. Background Technology

[0002] The evaluation system for verifying equipment utilization capabilities during general substation inspection work has the following issues: i) The workforce of specialized substation companies ranges from a maximum of 9 to a minimum of 5, and among them, equipment utilization capabilities are significantly low, excluding essential technical skills. ii) Currently, there is no established evaluation system for the utilization capabilities of essential equipment when registering new work teams. iii) There is currently no automated evaluation model capable of quantifying equipment utilization. iv) It is impossible to verify actual equipment utilization during construction capability assessments due to the reliance on oral evaluations. v) Experience is required not only for the use of individual equipment but also for the integrated operation of multiple pieces of equipment in various situations. vi) Failures caused by gas valve misoperation continue to occur. For example, there have been 8 such incidents over the past 5 years. In light of these failure cases, it is necessary to acquire the expertise to cross-check alongside supervision and inspection.

[0003] Therefore, there is a need for a device and method that can reduce failures caused by gas valve misoperation by enhancing the understanding of the location and role of each gas valve for each work process, and can secure experience regarding the interactions resulting from the operation of each piece of equipment by virtually combining the equipment required for each work process. Prior art literature

[0004] Korean Registered Patent No. 1,126,292 The problem to be solved

[0005] The present invention aims to provide a gas valve measuring device capable of verifying whether a gas valve is open or closed and whether a measuring device is properly connected to the gas valve. Furthermore, the present invention aims to provide a gas valve measuring system comprising the aforementioned gas valve measuring device. Additionally, the present invention aims to provide a gas valve measuring method using the aforementioned gas valve measuring system. means of solving the problem

[0006] A gas valve measuring device according to the first embodiment of the present invention can determine whether a gas valve is open or closed. The gas valve measuring device is connected to a gas valve module that includes a gas valve extending in one direction through which gas flows and a handle that rotates to open or close the gas valve, thereby enabling verification of whether the gas valve is open or closed. The gas valve measuring device includes: i) a housing unit detachably connected to the gas valve; ii) a magnetic body positioned adjacent to the handle; and iii) a sensor unit positioned in the housing unit and operated depending on whether the magnetic body is positioned adjacently. The sensor unit confirms that the gas valve is open when the magnetic body is rotated by the handle so as to be adjacent to the sensor unit. The sensor unit confirms that the gas valve is closed when the magnetic body is rotated by the handle so as to be separated from the sensor unit.

[0007] The sensor unit operates based on whether it comes into contact with a magnetic material. The sensor unit turns ON when the magnetic material is rotated in one direction by the handle and comes into contact with the sensor unit. The sensor unit turns OFF when the magnetic material is rotated in the other direction by the handle and comes into non-contact with the sensor unit.

[0008] The sensor unit further includes a lamp that turns ON or OFF depending on whether the magnetic body is placed in an adjacent position or makes contact. The lamp lights up when the magnetic body is rotated in one direction and comes into contact with the sensor unit. The lamp turns off when the magnetic body is rotated in the other direction and does not come into contact with the sensor unit.

[0009] The housing unit includes i) a first housing connected to one side of the gas valve, and ii) a second housing connected to the other side of the gas valve and detachably connected to the first housing. In the first housing and the second housing, a through hole is formed through which the upper part of the gas valve passes when the first housing and the second housing are connected to the gas valve.

[0010] The housing unit further includes a fixing member that fastens the first housing and the second housing. A cable hole through which the fixing member passes is formed in the first housing and the second housing.

[0011] A handle is positioned at the upper part of the gas valve. A magnetic body is positioned at the lower part of the handle. A sensor support is formed on one side of the second housing to which a sensor part is attached. The sensor support extends from one side of the second housing to a height adjacent to the magnetic body.

[0012] A gas valve measuring device according to a first embodiment of the present invention comprises: i) a gas valve module including a gas valve that extends in one direction and through which gas flows, and a handle that rotates to open and close the gas valve; ii) a housing unit detachably connected to the gas valve; iii) a magnetic body positioned adjacent to the handle; and iv) a sensor unit positioned in the housing unit and operated according to whether the magnetic body is adjacent or in contact. The sensor unit is turned ON so that the gas valve can be confirmed to be open when the magnetic body is rotated by the handle to be adjacent to or in contact with the sensor unit. The sensor unit is turned OFF so that the gas valve can be confirmed to be closed when the magnetic body is rotated by the handle to be separated from or not in contact with the sensor unit, thereby allowing verification of whether the gas valve is open or closed.

[0013] The handle is positioned at the upper part of the gas valve. The magnetic body is positioned at the lower part of the handle. A sensor support is formed on one side of the housing unit to which the sensor part is attached. The sensor support extends from one side of the housing unit to a height adjacent to the magnetic body.

[0014] A gas valve measuring device according to a second embodiment of the present invention can verify whether the measuring device is properly connected to a gas valve. The gas valve measuring device is connected to a gas valve module comprising a gas valve through which gas flows and a valve bracket having a discharge hole formed in communication with the outside, thereby enabling verification of whether it is properly connected to the gas valve module. The gas valve measuring device includes: i) a cover unit detachably connected to the valve bracket to surround the perimeter of the valve bracket; ii) a gas injection unit connected to the valve bracket to communicate with the discharge hole; iii) a magnetic body disposed in the gas injection unit; and iv) a sensor unit disposed in the cover unit and operating depending on whether the magnetic body is adjacent. When the magnetic body is disposed adjacent to the sensor unit, it is confirmed that the gas injection unit is properly connected to the valve bracket. When the magnetic body is disposed spaced apart from the sensor unit, it is confirmed that the gas injection unit is abnormally connected to the valve bracket.

[0015] The sensor unit operates depending on whether it comes into contact with a magnetic material. The sensor unit turns ON when a magnetic material is positioned to come into contact with the sensor unit. The sensor unit turns OFF when a magnetic material is positioned not to come into contact with the sensor unit.

[0016] The sensor unit further includes a lamp that turns ON or OFF depending on whether a magnetic material is placed adjacently or in contact. The lamp lights up when the magnetic material is placed adjacently or in contact with the sensor part. The lamp turns off when the magnetic material is placed apart from or not in contact with the sensor part.

[0017] The magnetic body is positioned at the upper and lower portions of the gas injection unit. The sensor portion is positioned at the lower portion of the cover unit. When the gas injection unit is fastened to the valve bracket, the magnetic body is positioned adjacent to or in contact with the sensor portion. The sensor portion is positioned at one or more of the upper and lower portions of the cover unit.

[0018] A communication hole is formed in the central part of the gas injection unit, which communicates with the discharge hole. The gas injection unit includes a gas inlet that receives gas from the outside. The gas inlet is connected to the communication hole so that external gas flows into the discharge hole through the communication hole.

[0019] The cover unit includes a fastening bolt that secures the cover unit to the valve bracket. A bolt fastening hole is formed in the cover unit through which the fastening bolt passes.

[0020] A gas valve measuring system according to one embodiment of the present invention includes: i) one or more gas valve measuring devices connected to a gas valve of a power transmission line facility and capable of verifying whether the gas valve is open or closed or properly closed; and ii) a recovery filling model device that recovers gas from the power transmission line facility through the gas valve measuring device or fills the recovered gas into the power transmission line facility through the gas valve measuring device. The recovery filling model device includes: i) a tank unit comprising a recovery tank receiving gas recovered from the gas valve measuring device; ii) a gas flow line comprising a plurality of channels providing a path for gas to flow between the gas valve measuring device and the recovery tank; and iii) a valve unit comprising a plurality of valves arranged in the plurality of channels and opened or closed to allow or block the flow of gas.

[0021] The valve unit and the plurality of gas valve measuring devices optionally recover gas within the gas valve measuring device into a recovery tank or fill the gas within the recovery tank into the gas valve measuring device. The recovery filling model device further includes a pump unit for recovering gas within the transmission line facility into a recovery tank. The pump unit includes i) a first vacuum pump for primary recovery of gas within the transmission line facility into a recovery tank, and ii) a second vacuum pump for secondary recovery of gas within the transmission line facility into a recovery tank.

[0022] The first vacuum pump fills the gas in the recovery tank into the transmission line facility. The second vacuum pump recovers the gas in the transmission line facility into the recovery tank with a higher output than the first vacuum pump.

[0023] The recovery filling model device is connected to a gas valve measuring device and further includes a vacuum device that removes residual gas within the transmission line equipment and measures residual gas within the transmission line equipment.

[0024] The vacuum device includes i) a suction pump connected to a gas valve measuring device and removing residual gas within the transmission line facility by sucking it in, and ii) a vacuum gauge connected to a gas valve measuring device and measuring residual gas within the transmission line facility.

[0025] The tank unit further includes i) a chiller for cooling the recovery tank that is heated when recovering gas from the transmission line facility into the recovery tank, and ii) a heater for heating the recovery tank that is cooled when filling the gas from the recovery tank into the transmission line facility.

[0026] A gas valve measurement method using a gas valve measurement system according to one embodiment of the present invention comprises: i) a recovery tank vacuum formation step of removing gas inside the recovery tank to form a vacuum inside the recovery tank; ii) a natural recovery step of recovering gas inside the transmission line facility into the recovery tank by a pressure difference using a valve unit and a plurality of gas valve measurement devices; iii) a mechanical recovery step of recovering gas inside the transmission line facility into the recovery tank using a pump unit; iv) a natural filling step of filling gas inside the recovery tank into the transmission line facility by a pressure difference using a valve unit and a plurality of gas valve measurement devices; and v) a mechanical filling step of filling gas inside the recovery tank into the transmission line facility using a pump unit.

[0027] A gas valve measurement method according to one embodiment of the present invention further includes a transmission line facility vacuum formation step, which is performed between a mechanical recovery step and a natural filling step, and involves removing residual gas within the transmission line facility using a vacuum device to form a vacuum inside the transmission line facility and measuring the residual gas within the transmission line facility.

[0028] The vacuum formation step of the transmission line facility includes i) a residual gas removal step of removing residual gas within the transmission line facility by sucking it in with a suction pump, and ii) a residual gas measurement step of measuring residual gas within the transmission line facility with a vacuum gauge.

[0029] The mechanical recovery step includes i) a first mechanical recovery step of recovering gas within the transmission line facility into a recovery tank using a first vacuum pump, and ii) a second mechanical recovery step of recovering gas within the transmission line facility into a recovery tank using a second vacuum pump. In the second mechanical recovery step, gas within the transmission line facility is recovered into the recovery tank at a higher output than in the first mechanical recovery step. In the mechanical filling step, gas within the recovery tank is filled into the transmission line facility using a first vacuum pump. Effects of the invention

[0030] It is possible to verify whether the gas valve is open or closed. It is possible to verify whether the measuring device is properly connected to the gas valve. Gas can be recovered from the transmission line equipment into the recovery tank via the measuring device, or the gas recovered from the recovery tank can be filled back into the transmission line equipment via the measuring device. During the inspection of the GIS (gas insulated switchgear), the operation of the gas valve can be verified. It is possible to check whether it is properly connected to the gas inlet and whether the gas valve is open or closed. During the GIS inspection, the connection to the gas inlet and the opening or closing of the gas valve on the LCP side can be verified. The equipment utilization skills required during the GIS inspection can be verified. By developing an evaluation model for the utilization of essential equipment, the equipment utilization capabilities of work teams and construction quality can be improved. Opportunities to acquire competencies can be provided to internal employees by establishing in-house training courses. By enhancing understanding of the location and role of each gas valve for each work process, the occurrence of failures caused by gas valve misoperation can be reduced. By virtually combining the equipment required for each work process, users can gain experience regarding the interactions associated with the operation of each piece of equipment. It can be utilized as in-house training material to prevent valve misoperation, which accounts for the majority of failures. Brief explanation of the drawing

[0031] FIG. 1 is a drawing of a gas valve measuring device according to a first embodiment of the present invention. Figure 2 is a diagram showing the operation method of the gas valve measuring device of Figure 1. Figure 3 is a diagram showing the configuration of the gas valve measuring device of Figure 1. FIG. 4 is a drawing of a gas valve measuring device according to a second embodiment of the present invention. Figures 5 and 6 are drawings showing the configuration of the gas valve measuring device of Figure 4. FIG. 7 is a diagram showing the configuration of a gas valve measurement system and a gas recovery operation method according to an embodiment of the present invention. Figure 8 is a diagram showing the vacuum device of the gas valve measuring system of Figure 7. Figure 9 is a diagram showing the configuration of the gas valve measuring system of Figure 7 and the gas filling operation method. FIG. 10 is a diagram showing the steps of a gas valve measurement method according to one embodiment of the present invention. Specific details for implementing the invention

[0032] The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0033] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined. For example, the term “applied” described below is interpreted to include both the state in which it is appropriately used and the state prior to appropriate use.

[0034] Expressions described in the singular in this specification may be interpreted as singular or plural unless explicit expressions such as "one" or "single" are used.

[0035] In this specification, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component.

[0036] In the flowchart described with reference to the drawings in this specification, the order of operations may be changed, several operations may be merged or some operations may be divided, and certain operations may not be performed.

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0038] FIGS. 1 to 3 are perspective views schematically showing the shape of a gas valve measuring device (10) according to a first embodiment of the present invention. That is, FIGS. 1 and 2 show the operation method of the gas valve measuring device (10), and FIG. 3 shows the configuration of the gas valve measuring device (10). The gas valve measuring device (10) of FIGS. 1 to 3 is merely for illustrating the present invention and is not limited thereto. Accordingly, it can be modified differently.

[0039] As illustrated in FIGS. 1 and 2, a gas valve measuring device (10) is connected to a gas valve module (100) to check whether the gas valve (110) is open or closed. For example, the gas valve measuring device (10) of FIGS. 1 and 2 can check whether the gas valve (110) is normally open or closed when checking a gas insulated switchgear (GIS). The gas valve measuring device (10) includes a gas valve module (100), a housing unit (200), a magnetic body (300), and a sensor unit (400).

[0040] The gas valve module (100) includes a gas valve (110), a handle (120), and a valve bracket (130). The gas valve (110) extends in one direction and allows gas to flow inside. The gas flowing inside the gas valve (110) may be sulfur hexafluoride (SF6) gas. A separate facility is connected to one side of the gas valve (110), and the valve bracket (130) is connected to the other side of the gas valve (110) so as to be internally connected. A gas valve measuring device (10) is attached to the upper part of the gas valve (110).

[0041] A handle (120) is positioned at the upper end of a gas valve (110) and rotates to open and close the gas valve (110). For example, when the handle (120) is rotated in one direction, the flow of gas within the gas valve (110) is blocked (Fig. 1). When the handle (120) is rotated in the other direction, the flow of gas within the gas valve (110) is allowed (Fig. 2). A magnetic body (300) is attached to the lower end of the handle (120).

[0042] A discharge hole (131) communicating with the outside is formed in the valve bracket (130) (see FIG. 4). One side of the valve bracket (130) is connected to the gas valve (110), so that gas inside the gas valve (110) is discharged to the outside through the discharge hole (131), or external gas flows into the gas valve (110) through the discharge hole (131). A detailed description of the valve bracket (130) will be provided later.

[0043] The housing unit (200) is detachably connected to the upper part of the gas valve (110). The housing unit (200) includes a first housing (210), a second housing (220), a sensor support (230), and a fixing member (240).

[0044] The first housing (210) is attached to one side of the upper portion of the gas valve (110). The second housing (220) is attached to the other side of the upper portion of the gas valve (110) and is detachably attached to the first housing (210). In the first housing (210) and the second housing (220), a through hole (250) is formed through which the upper portion of the gas valve (110) passes when the first housing (210) and the second housing (220) are attached to the gas valve (110). These first housing (210) and second housing (220) can be manufactured using a 3D printer.

[0045] In the first housing (210) and the second housing (220), a first cable hole (211) and a second cable hole (221) are formed through which a fixing member (240) passes. The fixing member (240) fastens the first housing (210) and the second housing (220). The fixing member (240) includes a cable tie. For example, the cable tie passes through the first cable hole (211) of the first housing (210) and the second cable hole (221) of the second housing (220) to fix the first housing (210) and the second housing (220) so that they do not separate from each other.

[0046] A sensor support (230) is formed on one side of the second housing (220), and a sensor part (410) is attached to the sensor support (230). The sensor support (230) extends from one side of the second housing (220) to a height adjacent to the magnetic body (300) so that the sensor part (410) is positioned horizontally with respect to the magnetic body (300) located at the bottom of the handle (120).

[0047] As illustrated in FIGS. 2 and 3, a magnetic body (300) generates magnetic force and is positioned at the lower end of the handle (120) adjacent to the handle (120). The magnetic body (300) includes a circular or polygonal magnet with a diameter of about 1 cm.

[0048] The sensor unit (400) is placed in the second housing (220) of the housing unit (200) and includes a sensor part (410) and a lamp (420). The sensor part (410) is operated depending on whether it is placed adjacent to or in contact with a magnetic body (300). The sensor part (410) includes a magnetic sensor. The sensor part (410) is attached to a sensor support (230) of the second housing (220).

[0049] The sensor unit (410) is confirmed to have the gas valve (110) opened when the magnetic body (300) is rotated by the handle (120) so as to be adjacent to or in contact with the sensor unit (410) (Fig. 2). For example, the sensor unit (410) is turned ON when the magnetic body (300) is rotated in one direction by the handle (120) so that the magnetic body (300) is placed adjacent to or in contact with the sensor unit (410).

[0050] The sensor unit (410) is confirmed to have closed the gas valve (110) when the magnetic body (300) is rotated by the handle (120) so as to be separated from or not in contact with the sensor unit (410) (Fig. 1). For example, the sensor unit (410) is turned off when the magnetic body (300) is rotated in the other direction by the handle (120) so that the magnetic body (300) is separated from or not in contact with the sensor unit (410).

[0051] The lamp (420) is turned on or off depending on whether the magnetic body (300) is placed in an adjacent position or comes into contact. For example, the lamp (420) is turned on when the magnetic body (300) is rotated in one direction by the handle (120) and comes into contact with the sensor part (410) (Fig. 2). Conversely, the lamp (420) is turned off when the magnetic body (300) is rotated in the other direction and the magnetic body (300) does not come into contact with the sensor part (410) (Fig. 1). Thus, the user can check whether the gas valve (110) is open or closed depending on whether the lamp (420) is turned on.

[0052] FIGS. 4 to 6 are perspective views schematically illustrating the shape of a gas valve measuring device (20) according to a second embodiment of the present invention. Specifically, FIG. 4 shows the configuration of the gas valve measuring device (20), and FIGS. 5 and 6 show the parts of the gas valve measuring device (20) separated. The gas valve measuring device (20) of FIGS. 4 to 6 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0053] As illustrated in FIGS. 4 to 6, the gas valve measuring device (20) can check whether the gas injection unit (600) of the gas valve measuring device (20) is properly connected to the valve bracket (130) of the gas valve module (100). For example, the gas valve measuring device (20) of FIGS. 4 and 5 can be connected to a local control panel (LCP). An LCP refers to an assembly capable of operating equipment such as a pressure gauge and an operating switch.

[0054] The gas valve measuring device (20) includes a gas valve module (100), a cover unit (500), a magnetic body (300), a gas injection unit (600), and a sensor unit (400).

[0055] A discharge hole (131) communicating with the outside is formed in the valve bracket (130) of the gas valve module (100). A cover unit (500) is attached to the valve bracket (130) to surround the perimeter. Additionally, a gas injection unit (600) is attached to the valve bracket (130) to communicate with the discharge hole (131). For example, the discharge hole (131) of the valve bracket (130) communicates with the communication hole (610) and the gas injection port (620) of the gas injection unit (600).

[0056] Accordingly, gas inside the gas valve (110) can be discharged to the outside through the exhaust hole (131) of the valve bracket (130) and the communication hole (610) and gas inlet (620) of the gas injection unit (600). Conversely, external gas can be introduced into the gas valve (110) through the exhaust hole (131) of the valve bracket (130) from the gas inlet (620) and communication hole (610) of the gas injection unit (600).

[0057] As illustrated in FIGS. 4 and 5, the cover unit (500) is detachably fastened to the valve bracket (130) to surround the perimeter of the valve bracket (130). That is, the cover unit (500) has a polygonal shape and is fastened to fit around the perimeter of the valve bracket (130). The cover unit (500) includes fastening bolts (510) that secure the cover unit (500) to the valve bracket (130). Additionally, bolt fastening holes (520) through which the fastening bolts (510) pass are formed at the upper and lower ends of the cover unit (500). A plurality of fastening bolts (510) pass through the bolt fastening holes (520) and are fastened to the valve bracket (130). Thus, the cover unit (500) is prevented from detaching from the valve bracket (130).

[0058] The magnetic body (300) is positioned on one side of the upper part and the other side of the lower part of the gas injection unit (600). The magnetic body (300) is positioned adjacent to or in contact with the sensor part (410) when the gas injection unit (600) is connected to the valve bracket (130).

[0059] For example, if a magnetic body (300) placed in a gas injection unit (600) is positioned to be adjacent to or in contact with a sensor part (410) of a sensor unit (400) placed in a cover unit (500), the sensor part (410) of the sensor unit (400) is turned ON. In this case, it is confirmed that the gas injection unit (600) is properly connected to the valve bracket (130).

[0060] Conversely, if the magnetic body (300) placed in the gas injection unit (600) is positioned so as to be spaced apart or non-contact with the sensor part (410) of the sensor unit (400) placed in the cover unit (500), the sensor part (410) of the sensor unit (400) is turned off. In this case, it is confirmed that the gas injection unit (600) is not connected to the valve bracket (130) or is connected abnormally.

[0061] As illustrated in FIGS. 5 and 6, the gas injection unit (600) is connected to the valve bracket (130) so as to communicate with the discharge hole (131) of the valve bracket (130). In the gas injection unit (600), a communication hole (610) is formed in the central part that communicates with the discharge hole (131) of the valve bracket (130). The gas injection unit (600) includes a gas inlet (620) for receiving gas from the outside. The gas inlet (620) is connected to the communication hole (610) so that external gas flows into the discharge hole (131) through the communication hole (610). Meanwhile, a magnetic body (300) is placed at the upper and lower parts of the gas injection unit (600).

[0062] As illustrated in FIGS. 4 and 5, the sensor unit (400) is disposed in the cover unit (500) and includes a sensor section (410) and a lamp (420). The sensor section (410) operates depending on whether the magnetic body (300) is adjacent or in contact. The sensor section (410) includes a magnetic sensor. The sensor section (410) is disposed at the bottom of the cover unit (500). Additionally, the sensor section (410) may be disposed at one or more of the top and bottom sections of the cover unit (500). That is, the sensor section (410) may be disposed at either the top or bottom section of the cover unit (500), or may be disposed at both the top and bottom sections of the cover unit (500).

[0063] The sensor unit (410) is confirmed to be properly connected to the valve bracket (130) when the magnetic body (300) is positioned adjacent to or in contact with the sensor unit (410). For example, the sensor unit (410) is turned ON when the gas injection unit (600) is properly connected to the valve bracket (130) and the magnetic body (300) is positioned adjacent to or in contact with the sensor unit (410).

[0064] The sensor unit (410) is confirmed to be unattached to or abnormally attached to the valve bracket (130) when the magnetic body (300) is positioned so as to be spaced apart or non-contact with the sensor unit (410). For example, the sensor unit (410) is turned off when the gas injection unit (600) is not attached to or is abnormally attached to the valve bracket (130) so as to be spaced apart or non-contact with the magnetic body (300).

[0065] The lamp (420) is turned on or off depending on whether the magnetic body (300) is placed adjacently or in contact with it. For example, the lamp (420) is lit when the magnetic body (300) is placed adjacently or in contact with the sensor unit (410). Conversely, the lamp (420) is turned off when the magnetic body (300) is placed apart from or is not in contact with the sensor unit (410). Thus, the user can check whether the gas injection unit (600) is properly connected to the valve bracket (130) based on whether the lamp (420) is lit.

[0066] FIGS. 7 to 9 are schematic drawings illustrating the shape of a gas valve measuring system (1) using a gas valve measuring device (10, 20) according to an embodiment of the present invention. Specifically, FIG. 7 shows a configuration in which gas is recovered from a transmission line facility (TL) of the gas valve measuring system (1) to a recovery tank (1110) through the gas valve measuring device (10, 20); FIG. 8 shows a configuration in which residual gas from the transmission line facility (TL) is removed; and FIG. 9 shows a configuration in which the gas recovered in the recovery tank (1110) is filled into the transmission line facility (TL) through the gas valve measuring device (10, 20). The gas valve measuring system (1) of FIGS. 7 to 9 is merely for illustrating the present invention and is not limited thereto. Therefore, it may be modified differently. In addition, in describing FIGS. 7 to 9, since the configurations of the gas valve measuring device (10) are similar to the structures of FIGS. 1 to 6, the same reference numerals are used for identical parts and detailed descriptions are omitted.

[0067] As illustrated in FIG. 7, the transmission line facility (TL) at the site is divided into an upper busbar section (BB), a blocking section (GCB), a first DS section (DS1), and a second DS section (DS2). A gas valve measuring device (10) according to the first embodiment and a gas valve measuring device (20) according to the second embodiment are connected to the transmission line facility (TL).

[0068] The gas valve measuring system (1) includes a gas valve measuring device (10) according to a first embodiment, a gas valve measuring device (20) according to a second embodiment, a recovery filling model device (30), and a vacuum device (40).

[0069] The gas valve measuring device (10) according to the first embodiment can check whether the gas valve (110) is normally opened or closed when inspecting the gas insulated switchgear (GIS), and includes a plurality of gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) (e.g., 9).

[0070] The gas valve measuring device (20) according to the second embodiment is connected to the LCP (local control panel) and can check whether the gas injection unit (600) of the gas valve measuring device (20) is properly connected to the valve bracket (130) of the gas valve module (100). The gas valve measuring device (20) includes a plurality (for example, four) of gas valve measuring devices (20a, 20b, 20c, 20d). The gas valve measuring devices (20) may each be named as a Branch Bus gas valve measuring device (20a), a GCB gas valve measuring device (20b), a first DS part gas valve measuring device (20c), and a second DS part gas valve measuring device (20d).

[0071] As illustrated in FIG. 7, the recovery filling model device (30) is a model device capable of recovering gas from a transmission line facility (TL) to a recovery tank (1110) through a gas valve measuring device (10, 20), or filling the gas recovered to the recovery tank (1110) to the transmission line facility (TL) through the gas valve measuring device (10, 20). The recovery filling model device (30) includes a tank unit (31), a gas flow line (32), a valve unit (33), and a pump unit (34).

[0072] The tank unit (31) includes a recovery tank (1110), a refrigerator (1120), and a heater (1130). The recovery tank (1110) receives gas recovered from the gas valve measuring device (10, 20). The refrigerator (1120) cools the recovery tank (1110) which is heated when gas within the transmission line facility (TL) is recovered into the recovery tank (1110). The heater (1130) heats the recovery tank (1110) which is cooled when gas within the recovery tank (1110) is filled into the transmission line facility (TL).

[0073] The gas flow line (32) includes a connecting channel (1210) and a flow channel (1220) that provide a path for gas to flow between the gas valve measuring device (10, 20) and the recovery tank (1110). The connecting channel (1210) provides a path for gas to flow between the gas valve measuring device (10, 20) and the recovery filling model device (30). The flow channel (1220) provides a path for gas to flow between the first valve (33a) to the eleventh valve (33k), the exhaust valve (33l), the pressure boosting valve (33m), the vacuum valve (33n), and the high-efficiency valve (33p) of the valve unit (33) within the recovery filling model device (30).

[0074] The valve unit (33) is positioned in the connection channel (1210) and a plurality of flow channels (1220) and is opened or closed to allow or block the flow of gas. The valve unit (33) includes a first valve (33a), a second valve (33b), a third valve (33c), a fourth valve (33d), a fifth valve (33e), a sixth valve (33f), a seventh valve (33g), an eighth valve (33h), a ninth valve (33i), a tenth valve (33j), an eleventh valve (33k), an exhaust valve (33l), a pressure boosting valve (33m), a vacuum valve (33n), and a high-efficiency valve (33p).

[0075] The valve unit (33) and the plurality of gas valve measuring devices (10, 20) optionally recover gas within the gas valve measuring device (10) into the recovery tank (1110) (Fig. 7). Additionally, the valve unit (33) and the plurality of gas valve measuring devices (10, 20) optionally fill the gas within the recovery tank (1110) into the gas valve measuring device (10) (Fig. 9). The operation method for gas recovery and gas filling will be described later.

[0076] The pump unit (34) recovers gas within the transmission line facility (TL) into the recovery tank (1110). The pump unit (34) includes a first vacuum pump (1310) and a second vacuum pump (1320).

[0077] The first vacuum pump (1310) first recovers the gas within the transmission line facility (TL) into the recovery tank (1110) (Fig. 7). Afterwards, the remaining gas within the transmission line facility (TL) is removed by the vacuum device (40), and the remaining gas within the transmission line facility (TL) is measured (Fig. 8). Afterwards, the first vacuum pump (1310) fills the gas within the recovery tank (1110) into the transmission line facility (TL) (Fig. 9). The first vacuum pump (1310) includes a compressor.

[0078] The second vacuum pump (1320) recovers gas from within the transmission line facility (TL) into the recovery tank (1110) for secondary recovery. Additionally, the second vacuum pump (1320) recovers gas from within the transmission line facility (TL) into the recovery tank (1110) with a higher output than the first vacuum pump (1310).

[0079] As illustrated in FIG. 8, the vacuum device (40) is connected to the gas valve measuring device (10, 20) to remove residual gas within the transmission line facility (TL) and to measure residual gas within the transmission line facility (TL). The vacuum device (40) includes a suction pump (41), a vacuum gauge (42), a first control valve (43a), a second control valve (43b), and a third control valve (43c).

[0080] The suction pump (41) is connected to the gas valve measuring device (10, 20) and sucks in and removes residual gas within the transmission line facility (TL). For example, after all the gas within the transmission line facility (TL) is recovered into the recovery tank (1110) using the first vacuum pump (1310) and the second vacuum pump (1320), the suction pump (41) is used to suck in and remove the remaining gas within the transmission line facility (TL).

[0081] The vacuum gauge (42) is connected to the gas valve measuring device (10, 20) and measures residual gas within the transmission line facility (TL). For example, after removing residual gas within the transmission line facility (TL) by sucking it in with the suction pump (41), the vacuum gauge (42) is used to measure whether residual gas remains within the transmission line facility (TL).

[0082] The first control valve (43a), the second control valve (43b), and the third control valve (43c) are connected to the gas valve measuring device (10, 20), the suction pump (41), and the vacuum gauge (42) to open or close to allow or block the flow of gas.

[0083] FIG. 10 is a schematic diagram illustrating a gas valve measurement method (S100) using a gas valve measurement system (1) according to an embodiment of the present invention. That is, FIG. 10 illustrates the steps of the gas valve measurement method (S100). The gas valve measurement method (S100) of FIG. 10 is merely for illustrating the present invention and is not limited thereto. Therefore, it may be modified differently. The gas valve measurement method (S100) of FIG. 10 may be described together with FIG. 7 to 9. Furthermore, in describing FIG. 10, since the configurations of the gas valve measurement system (1) and the gas valve measurement device (10, 20) are similar to the structures of FIG. 1 to 9, the same reference numerals are used for identical parts, and detailed descriptions thereof are omitted.

[0084] As illustrated in FIG. 10, the gas valve measurement method (S100) is a measurement method that can verify whether the gas valve module (100) is open or closed or properly connected using a gas valve measurement system (1). The gas valve measurement method (S100) includes a recovery tank vacuum formation step (S110), a natural recovery step (S120), a mechanical recovery step (S130), a transmission line facility vacuum formation step (S140), a natural filling step (S150), and a mechanical filling step (S160).

[0085] As illustrated in FIGS. 7 and FIGS. 10, the recovery tank vacuum formation step (S110) is a step of removing gas inside the recovery tank (1110) to form a vacuum inside the recovery tank (1110).

[0086] The conditions for forming a vacuum inside the recovery tank (1110) are as follows.

[0087] i) The power supply to the transmission line equipment (TL), the recovery filling model device (30), and the vacuum device (40) is cut off. ii) The valves of the Branch Bus gas valve measuring device (20a), the GCB gas valve measuring device (20b), the first DS section gas valve measuring device (20c), and the second DS section gas valve measuring device (20d) are closed. iii) A plurality of gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened.

[0088] The operating method for creating a vacuum inside the recovery tank (1110) is as follows.

[0089] i) Turn on the second vacuum pump (1320) ii) Open the vacuum valve (33n) iii) Open the sixth valve (33f) iv) Open the seventh valve (33g) v) Open the tenth valve (33j)

[0090] As illustrated in FIGS. 7 and FIGS. 10, the natural recovery step (S120) is a step of recovering gas within the transmission line facility (TL) into a recovery tank (1110) by means of a pressure difference using a valve unit (33) and a plurality of gas valve measuring devices (10, 20) (Fig. 7).

[0091] Natural recovery stage test example (1)

[0092] The conditions for proceeding with the natural recovery step (S120) when the gas from the blocking section (GCB) of the transmission line facility (TL) is transferred to the recovery tank (1110) and the pressure inside the gas-insulated switchgear (GIS) is higher than the pressure in the recovery tank (1110) are as follows.

[0093] i) Maintain conditions to form a vacuum inside the recovery tank (1110). ii) Check the maintenance of the vacuum level of the recovery tank (1110). iii) Check the maintenance of the vacuum level of the first valve (33a), second valve (33b), third valve (33c), fourth valve (33d), fifth valve (33e), sixth valve (33f), seventh valve (33g), eighth valve (33h), ninth valve (33i), tenth valve (33j), and eleventh valve (33k) of the valve unit (33).

[0094] The operation method of the recovery filling model device (30) for carrying out a natural recovery step (S120) of the gas from the blocking section (GCB) of the transmission line facility (TL) into the recovery tank (1110) is as follows.

[0095] i) Turn on the power to the chiller (1120) ii) Open the 11th valve (33k) iii) Open the 7th valve (33g) iv) Open the 4th valve (33d) v) Open the 3rd valve (33c) vii) Open the 1st valve (33a) vii) Check the transmission line facility (TL) piping and close the gas valve measuring device (10c) viii) Check the transmission line facility (TL) piping and open the GCB gas valve measuring device (20b)

[0096] Natural recovery stage test example (2)

[0097] The conditions for carrying out the natural recovery step (S120) when the gas from the upper busbar section (BB) of the transmission line facility (TL) is transferred to the recovery tank (1110) and the pressure inside the GIS is higher than the pressure of the recovery tank (1110) are the same as the natural recovery step (S120) in the blocking section (GCB).

[0098] The operation method of the recovery filling model device (30) that performs a natural recovery step (S120) of the gas from the upper busbar section (BB) of the transmission line facility (TL) into the recovery tank (1110) is as follows.

[0099] i) Turn on the power to the chiller (1120) ii) Open the 11th valve (33k) iii) Open the 7th valve (33g) iv) Open the 4th valve (33d) v) Open the 3rd valve (33c) vii) Open the 1st valve (33a) vii) Check the transmission line facility (TL) piping and close the gas valve measuring device (10b) viii) Check the transmission line facility (TL) piping and open the Branch Bus gas valve measuring device (20a)

[0100] Natural recovery stage test example (3)

[0101] The conditions for proceeding with the natural recovery step (S120) when the gas of the first DS section (DS1) of the transmission line facility (TL) is transferred to the recovery tank (1110) and the pressure inside the GIS is higher than the pressure of the recovery tank (1110) are the same as the natural recovery step (S120) in the blocking section (GCB).

[0102] The operation method of the recovery filling model device (30) that performs a natural recovery step (S120) of the gas from the first DS section (DS1) of the transmission line facility (TL) into the recovery tank (1110) is as follows.

[0103] i) Turn on the power to the chiller (1120) ii) Open the 11th valve (33k) iii) Open the 7th valve (33g) iv) Open the 4th valve (33d) v) Open the 3rd valve (33c) vi) Check the transmission line facility (TL) piping, close the gas valve measuring device (10f), and close the gas valve measuring device (10g) vii) Check the transmission line facility (TL) piping and open the 1st DS section gas valve measuring device (20c)

[0104] Natural recovery stage test example (4)

[0105] The conditions for proceeding with the natural recovery step (S120) when the gas from the second DS section (DS2) of the transmission line facility (TL) is transferred to the recovery tank (1110) and the pressure inside the GIS is higher than the pressure of the recovery tank (1110) are the same as the natural recovery step (S120) in the blocking section (GCB).

[0106] The operation method of the recovery filling model device (30) that performs a natural recovery step (S120) of the gas from the second DS section (DS2) of the transmission line facility (TL) into the recovery tank (1110) is as follows.

[0107] i) Turn on the power to the chiller (1120) ii) Open the 11th valve (33k) iii) Open the 7th valve (33g) iv) Open the 4th valve (33d) v) Open the 3rd valve (33c) vii) Open the 1st valve (33a) vii) Check the transmission line facility (TL) piping and close the gas valve measuring device (10h) and close the gas valve measuring device (10i) viii) Check the transmission line facility (TL) piping and open the 2nd DS section gas valve measuring device (20d)

[0108] As illustrated in FIGS. 7 and FIGS. 10, the mechanical recovery step (S130) is a step of recovering gas within the transmission line facility (TL) to a recovery tank (1110) using a pump unit (34) (Fig. 7). The mechanical recovery step (S130) is performed after the natural recovery step (S120). The mechanical recovery step (S130) includes a first mechanical recovery step (S131) ​​and a second mechanical recovery step (S132).

[0109] The first mechanical recovery step (S131) ​​is a step of recovering gas from within the transmission line facility (TL) into a recovery tank (1110) using a first vacuum pump (1310) or a compressor.

[0110] First mechanical recovery step test example (1)

[0111] The conditions for carrying out the first mechanical recovery step (S131) ​​by transferring the gas from the blocking section (GCB) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) or compressor are as follows.

[0112] i) After the natural recovery stage (S120), the pressure inside the transmission line facility (TL) and the pressure inside the recovery tank (1110) are the same. ii) The gas valve measuring device (10c) is opened, the GCB gas valve measuring device (20b) is opened, and the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened. iii) All valves of the valve unit (33) are closed.

[0113] The operation method of the recovery filling model device (30) for carrying out the first mechanical recovery step (S131) ​​by using a first vacuum pump (1310) or a compressor to transfer the gas from the blocking section (GCB) of the transmission line facility (TL) to the recovery tank (1110) is as follows.

[0114] i) Turn on the power to the refrigerator (1120) ii) Open the 7th valve (33g) iii) Open the 4th valve (33d) iv) Open the 2nd valve (33b) v) Turn on the power to the 1st vacuum pump (1310) or compressor vi) Open the 1st valve (33a) vii) Open the 11th valve (33k)

[0115] First mechanical recovery step test example (2)

[0116] The conditions for carrying out the first mechanical recovery step (S131) ​​by transferring the gas from the upper busbar section (BB) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) or compressor are as follows.

[0117] i) After the natural recovery stage (S120), the pressure inside the transmission line facility (TL) and the pressure inside the recovery tank (1110) are the same. ii) The gas valve measuring device (10b) is opened, the Branch Bus gas valve measuring device (20a) is opened, and the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened. iii) All valves of the valve unit (33) are closed.

[0118] The operation method of the recovery filling model device (30), which carries out the first mechanical recovery step (S131) ​​by using the first vacuum pump (1310) or compressor to transfer the gas from the upper busbar section (BB) of the transmission line facility (TL) to the recovery tank (1110), is the same as the first mechanical recovery step test example (1) as follows.

[0119] i) Turn on the power to the refrigerator (1120) ii) Open the 7th valve (33g) iii) Open the 4th valve (33d) iv) Open the 2nd valve (33b) v) Turn on the power to the 1st vacuum pump (1310) or compressor vi) Open the 1st valve (33a) vii) Open the 11th valve (33k)

[0120] First mechanical recovery step test example (3)

[0121] The conditions for carrying out the first mechanical recovery step (S131) ​​by transferring the gas from the first DS section (DS1) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) or compressor are as follows.

[0122] i) After the natural recovery stage (S120), the pressure inside the transmission line facility (TL) and the pressure inside the recovery tank (1110) are the same. ii) Open the gas valve measuring device (10f), open the gas valve measuring device (10g), open the first DS section gas valve measuring device (20c), and open the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g). iii) Close all valves of the valve unit (33).

[0123] The operation method of the recovery filling model device (30), which carries out the first mechanical recovery step (S131) ​​by using the first vacuum pump (1310) or compressor to transfer the gas of the first DS section (DS1) of the transmission line facility (TL) to the recovery tank (1110), is the same as the first mechanical recovery step test example (1) as follows.

[0124] i) Turn on the power to the refrigerator (1120) ii) Open the 7th valve (33g) iii) Open the 4th valve (33d) iv) Open the 2nd valve (33b) v) Turn on the power to the 1st vacuum pump (1310) or compressor vi) Open the 1st valve (33a) vii) Open the 11th valve (33k)

[0125] First mechanical recovery step test example (4)

[0126] The conditions for carrying out the first mechanical recovery step (S131) ​​by transferring the gas from the second DS section (DS2) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) or compressor are as follows.

[0127] i) After the natural recovery stage (S120), the pressure inside the transmission line facility (TL) and the pressure inside the recovery tank (1110) are the same. ii) The gas valve measuring device (10h) is opened, the gas valve measuring device (10i) is opened, the second DS section gas valve measuring device (20d) is opened, and the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened. iii) All valves of the valve unit (33) are closed.

[0128] The operation method of the recovery filling model device (30), which carries out the first mechanical recovery step (S131) ​​by using the first vacuum pump (1310) or compressor to transfer the gas from the second DS section (DS2) of the transmission line facility (TL) to the recovery tank (1110), is the same as the first mechanical recovery step test example (1).

[0129] As illustrated in FIGS. 7 and 10, the second mechanical recovery step (S132) is a step of secondarily recovering gas within the transmission line facility (TL) into the recovery tank (1110) using the second vacuum pump (1320). In the second mechanical recovery step (S132), the gas within the transmission line facility (TL) is recovered into the recovery tank (1110) with a higher output than in the first mechanical recovery step (S131). That is, the second vacuum pump (1320) recovers the gas within the transmission line facility (TL) into the recovery tank (1110) with a higher output than the first vacuum pump (1310).

[0130] Test example of the second mechanical recovery step (1)

[0131] The conditions for proceeding with the second mechanical recovery step (S132) by transferring the gas from the blocking section (GCB) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) and the second vacuum pump (1320) are as follows.

[0132] i) After the first mechanical recovery step (S131), the pressure inside the transmission line facility (TL) is equal to atmospheric pressure. ii) Open the gas valve measuring device (10c), open the GCB gas valve measuring device (20b), and open the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g). iii) Close all valves of the valve unit (33).

[0133] The operation method of the recovery filling model device (30) for carrying out the second mechanical recovery step (S132) by using the first vacuum pump (1310) and the second vacuum pump (1320) to the gas of the blocking section (GCB) of the transmission line facility (TL) into the recovery tank (1110) is as follows.

[0134] i) Turn on the power to the refrigerator (1120) ii) Open the 7th valve (33g) iii) Open the 4th valve (33d) iv) Turn on the power to the 1st vacuum pump (1310) or compressor v) Open the pressure booster valve (33m) vi) Turn on the 2nd vacuum pump (1320) vii) Open the high-efficiency valve (33p) viii) Open the 11th valve (33k)

[0135] Test example of the second mechanical recovery step (2)

[0136] The conditions for proceeding with the second mechanical recovery step (S132) by transferring the gas from the upper busbar section (BB) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) and the second vacuum pump (1320) are as follows.

[0137] i) After the first mechanical recovery step (S131), the pressure inside the transmission line facility (TL) is equal to atmospheric pressure. ii) Open the gas valve measuring device (10b), open the Branch Bus gas valve measuring device (20a), and open the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g). iii) Close all valves of the valve unit (33).

[0138] The operation method of the recovery filling model device (30), which carries out the second mechanical recovery step (S132) by using the first vacuum pump (1310) and the second vacuum pump (1320) to the gas of the upper busbar section (BB) of the transmission line facility (TL) into the recovery tank (1110), is the same as the second mechanical recovery step test example (1) as follows.

[0139] i) Turn on the power to the refrigerator (1120) ii) Open the 7th valve (33g) iii) Open the 4th valve (33d) iv) Turn on the power to the 1st vacuum pump (1310) or compressor v) Open the pressure booster valve (33m) vi) Turn on the 2nd vacuum pump (1320) vii) Open the high-efficiency valve (33p) viii) Open the 11th valve (33k)

[0140] Test example of the second mechanical recovery step (3)

[0141] The conditions for proceeding with the second mechanical recovery step (S132) by transferring the gas from the first DS section (DS1) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) and the second vacuum pump (1320) are as follows.

[0142] i) After the first mechanical recovery step (S131), the pressure inside the transmission line facility (TL) is equal to atmospheric pressure. ii) Open the gas valve measuring device (10f), open the gas valve measuring device (10g), open the first DS section gas valve measuring device (20c), and open the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g). iii) Close all valves of the valve unit (33).

[0143] The operation method of the recovery filling model device (30), which carries the gas from the first DS section (DS1) of the transmission line facility (TL) to the recovery tank (1110) and performs the second mechanical recovery step (S132) using the first vacuum pump (1310) and the second vacuum pump (1320), is the same as the second mechanical recovery step test example (1).

[0144] Test example of the second mechanical recovery step (4)

[0145] The conditions for proceeding with the second mechanical recovery step (S132) by transferring the gas from the second DS section (DS2) of the transmission line facility (TL) to the recovery tank (1110) using the first vacuum pump (1310) and the second vacuum pump (1320) are as follows.

[0146] i) After the first mechanical recovery step (S131), the pressure inside the transmission line facility (TL) is equal to atmospheric pressure. ii) Open the gas valve measuring device (10h), open the gas valve measuring device (10i), open the second DS section gas valve measuring device (20d), and open the gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g). iii) Close all valves of the valve unit (33).

[0147] The operation method of the recovery filling model device (30), which carries out the second mechanical recovery step (S132) by using the first vacuum pump (1310) and the second vacuum pump (1320) to the gas of the second DS section (DS2) of the transmission line facility (TL) into the recovery tank (1110), is the same as the second mechanical recovery step test example (1).

[0148] As illustrated in FIGS. 8 and 10, the transmission line facility vacuum formation step (S140) is performed between the mechanical recovery step (S130) and the natural filling step (S150). The transmission line facility vacuum formation step (S140) is a step of forming a vacuum inside the transmission line facility (TL) by removing residual gas inside the transmission line facility (TL) using the suction pump (41) of the vacuum device (40), and measuring the residual gas inside the transmission line facility (TL) using the vacuum gauge (42) of the vacuum device (40) (Fig. 8). The transmission line facility vacuum formation step (S140) includes a residual gas removal step (S141) and a residual gas measurement step (S142).

[0149] The residual gas removal step (S141) is a step of removing residual gas within the transmission line facility (TL) by sucking it in with the suction pump (41) of the vacuum device (40). The residual gas measurement step (S142) is a step of measuring residual gas within the transmission line facility (TL) with the vacuum gauge (42) of the vacuum device (40).

[0150] Vacuum formation operation and vacuum level verification test example (1)

[0151] After forming a vacuum inside the transmission line facility (TL), the conditions for checking the vacuum level of the blocking part (GCB) of the transmission line facility (TL) using a vacuum gauge (42) are as follows.

[0152] i) Open gas valve measuring device (10c) ii) Open GCB gas valve measuring device (20b) iii) Turn on power to suction pump (41) iv) Open first valve (33a), open second valve (33b) v) Turn on power to vacuum gauge (42) vi) Open gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g), close all valves of valve unit (33)

[0153] The operation method of the recovery filling model device (30) for checking the vacuum level of the blocking part (GCB) of the transmission line facility (TL) using a vacuum gauge (42) after forming a vacuum inside the transmission line facility (TL) is as follows.

[0154] i) Perform vacuuming with the suction pump (41) ii) Turn on the vacuum gauge (42) iii) Close the second valve (33b) iv) Close the third valve (33c)

[0155] Meanwhile, the criteria for internal vacuum and gas injection in a 154kV GIS tank is to inject gas when the vacuum level is 0.2 Torr or lower after at least one hour of operation following the attainment of 1 Torr.

[0156] Vacuum formation operation and vacuum level verification test example (2)

[0157] After forming a vacuum inside the transmission line facility (TL), the conditions for checking the vacuum level of the upper busbar section (BB) of the transmission line facility (TL) using a vacuum gauge (42) are as follows.

[0158] i) Open gas valve measuring device (10b) ii) Open Branch Bus gas valve measuring device (20a) iii) Turn on power to suction pump (41) iv) Open first valve (33a) and second valve (33b) v) Turn on power to vacuum gauge (42) vi) Open gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) and close all valves of valve unit (33).

[0159] After forming a vacuum inside the transmission line facility (TL), the operation method of the recovery filling model device (30) for checking the vacuum level of the upper busbar section (BB) of the transmission line facility (TL) using a vacuum gauge (42) is the same as the vacuum formation operation and vacuum level verification test example (1) as follows.

[0160] i) Perform vacuuming with the suction pump (41) ii) Turn on the vacuum gauge (42) iii) Close the second valve (33b) iv) Close the third valve (33c)

[0161] Vacuum formation operation and vacuum level verification test example (3)

[0162] After forming a vacuum inside the transmission line facility (TL), the conditions for checking the vacuum level of the first DS section (DS1) of the transmission line facility (TL) using a vacuum gauge (42) are as follows.

[0163] i) Open gas valve measuring device (10f), open gas valve measuring device (10g) ii) Open first DS section gas valve measuring device (20c) iii) Turn on power to suction pump (41) iv) Open first valve (33a), open second valve (33b) v) Turn on power to vacuum gauge (42) vi) Open gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g), close all valves of valve unit (33)

[0164] After forming a vacuum inside the transmission line facility (TL), the operation method of the recovery filling model device (30) for checking the vacuum level of the first DS section (DS1) of the transmission line facility (TL) using a vacuum gauge (42) is the same as the vacuum formation operation and vacuum level verification test example (1) as follows.

[0165] i) Perform vacuuming with the suction pump (41) ii) Turn on the vacuum gauge (42) iii) Close the second valve (33b) iv) Close the third valve (33c)

[0166] Vacuum formation operation and vacuum level verification test example (4)

[0167] After forming a vacuum inside the transmission line facility (TL), the conditions for checking the vacuum level of the second DS section (DS2) of the transmission line facility (TL) using a vacuum gauge (42) are as follows.

[0168] i) Open gas valve measuring device (10h), open gas valve measuring device (10i) ii) Open second DS section gas valve measuring device (20d) iii) Turn on suction pump (41) iv) Open first valve (33a), open second valve (33b) v) Turn on vacuum gauge (42) vi) Open gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g), close all valves of valve unit (33)

[0169] After forming a vacuum inside the transmission line facility (TL), the operation method of the recovery filling model device (30) for checking the vacuum level of the second DS section (DS2) of the transmission line facility (TL) using a vacuum gauge (42) is the same as the vacuum formation operation and vacuum level verification test example (1) as follows.

[0170] i) Perform vacuuming with the suction pump (41) ii) Turn on the vacuum gauge (42) iii) Close the second valve (33b) iv) Close the third valve (33c)

[0171] As illustrated in FIGS. 9 and 10, the natural filling step (S150) is a step of filling the gas inside the recovery tank (1110) into the transmission line facility (TL) using a pressure difference with the valve unit (33) and a plurality of gas valve measuring devices (10) (Fig. 9). That is, in the natural filling step (S150), the gas inside the recovery tank (1110) is naturally filled into the transmission line facility (TL) using the pressure difference without using the first vacuum pump (1310) and the second vacuum pump (1320) of the recovery filling model device (30) while the pressure inside the recovery tank (1110) is higher than the pressure inside the transmission line facility (TL).

[0172] Natural filling stage test example (1)

[0173] The conditions for the natural filling step (S150) for filling the gas inside the recovery tank (1110) into the blocking section (GCB) of the transmission line facility (TL) are as follows.

[0174] i) The power supply to the transmission line equipment (TL), the recovery filling model device (30), and the vacuum device (40) is cut off. ii) The valves of the Branch Bus gas valve measuring device (20a), the GCB gas valve measuring device (20b), the first DS section gas valve measuring device (20c), and the second DS section gas valve measuring device (20d) are closed. iii) A plurality of gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened.

[0175] The operation method of the recovery filling model device (30) for carrying out the natural filling step (S150) of the gas inside the recovery tank (1110) to the cutoff part (GCB) of the transmission line facility (TL) is as follows.

[0176] i) Turn on the heater (1130) ii) Open the 9th valve (33i) iii) Open the 3rd valve (33c) iv) Open the 4th valve (33d) v) Open the 11th valve (33k) vi) Open the 6th valve (33f) vii) Open the GCB gas valve measuring device (20b)

[0177] Natural filling stage test example (2)

[0178] The conditions for the natural filling step (S150) for filling the gas inside the recovery tank (1110) into the upper busbar section (BB) of the transmission line facility (TL) are the same as the natural filling step test example (1).

[0179] The operation method of the recovery filling model device (30) for carrying out the natural filling step (S150) of the gas inside the recovery tank (1110) into the upper busbar section (BB) of the transmission line facility (TL) is as follows.

[0180] i) Turn on the heater (1130) ii) Open the 9th valve (33i) iii) Open the 3rd valve (33c) iv) Open the 4th valve (33d) v) Open the 11th valve (33k) vi) Open the 6th valve (33f) vii) Open the Branch Bus gas valve measuring device (20a)

[0181] Natural filling stage test example (3)

[0182] The conditions for the natural filling step (S150) for filling the gas inside the recovery tank (1110) into the first DS section (DS1) of the transmission line facility (TL) are the same as the natural filling step test example (1).

[0183] The operation method of the recovery filling model device (30) for carrying out the natural filling step (S150) of the gas inside the recovery tank (1110) into the first DS section (DS1) of the transmission line facility (TL) is as follows.

[0184] i) Turn on the heater (1130) ii) Open the 9th valve (33i) iii) Open the 3rd valve (33c) iv) Open the 4th valve (33d) v) Open the 11th valve (33k) vi) Open the 6th valve (33f) vii) Open the 1st DS section gas valve measuring device (20c)

[0185] Natural filling stage test example (4)

[0186] The conditions for the natural filling step (S150) for filling the gas inside the recovery tank (1110) into the second DS section (DS2) of the transmission line facility (TL) are the same as the natural filling step test example (1).

[0187] The operation method of the recovery filling model device (30) for carrying out the natural filling step (S150) of the gas inside the recovery tank (1110) into the second DS section (DS2) of the transmission line facility (TL) is as follows.

[0188] i) Turn on the heater (1130) ii) Open the 9th valve (33i) iii) Open the 3rd valve (33c) iv) Open the 4th valve (33d) v) Open the 11th valve (33k) vi) Open the 6th valve (33f) vii) Open the 2nd DS section gas valve measuring device (20d)

[0189] As illustrated in FIGS. 9 and 10,

[0190] The mechanical filling step (S160) is a step of filling the gas inside the recovery tank (1110) into the transmission line facility (TL) using a pump unit (34). In the mechanical filling step (S160), the gas inside the recovery tank (1110) is filled into the transmission line facility (TL) using a first vacuum pump (1310).

[0191] Mechanical filling step test example (1)

[0192] The conditions for the mechanical filling step (S160) for filling the gas inside the recovery tank (1110) into the blocking section (GCB) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor are as follows.

[0193] i) After the natural filling stage (S150), the pressure in the transmission line facility (TL) and the pressure in the recovery tank (1110) are the same. ii) The valves of the Branch Bus gas valve measuring device (20a), GCB gas valve measuring device (20b), the first DS section gas valve measuring device (20c), and the second DS section gas valve measuring device (20d) are closed. iii) A plurality of gas valve measuring devices (10a, 10b, 10c, 10d, 10e, 10f, 10g) are opened.

[0194] The operation method of the recovery filling model device (30) for performing a mechanical filling step (S160) to fill the gas inside the recovery tank (1110) into the blocking section (GCB) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor is as follows.

[0195] i) Turn on the heater (1130) ii) Open the ninth valve (33i) iii) Open the second valve (33b) iv) Open the fourth valve (33d) v) Turn on the first vacuum pump (1310) or compressor vi) Open the eleventh valve (33k) vii) Open the sixth valve (33f) viii) Open the GCB gas valve measuring device (20b)

[0196] Mechanical filling step test example (2)

[0197] The conditions of the mechanical filling step (S160) for filling the gas inside the recovery tank (1110) into the upper busbar section (BB) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor are the same as those of the mechanical filling step test example (1).

[0198] The operation method of the recovery filling model device (30) for performing a mechanical filling step (S160) to fill the gas inside the recovery tank (1110) into the upper busbar section (BB) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor is as follows.

[0199] i) Turn on the heater (1130) ii) Open the ninth valve (33i) iii) Open the second valve (33b) iv) Open the fourth valve (33d) v) Turn on the first vacuum pump (1310) or compressor vi) Open the eleventh valve (33k) vii) Open the sixth valve (33f) viii) Open the Branch Bus gas valve measuring device (20a)

[0200] Mechanical filling step test example (3)

[0201] The conditions of the mechanical filling step (S160) for filling the gas inside the recovery tank (1110) into the first DS section (DS1) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor are the same as those of the mechanical filling step test example (1).

[0202] The operation method of the recovery filling model device (30) for performing a mechanical filling step (S160) to fill the gas inside the recovery tank (1110) into the first DS section (DS1) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor is as follows.

[0203] i) Turn on the heater (1130) ii) Open the ninth valve (33i) iii) Open the second valve (33b) iv) Open the fourth valve (33d) v) Turn on the first vacuum pump (1310) or compressor vi) Open the eleventh valve (33k) vii) Open the sixth valve (33f) viii) Open the first DS section gas valve measuring device (20c)

[0204] Mechanical filling step test example (4)

[0205] The conditions of the mechanical filling step (S160) for filling the gas inside the recovery tank (1110) into the second DS section (DS2) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor are the same as those of the mechanical filling step test example (1).

[0206] The operation method of the recovery filling model device (30) for performing a mechanical filling step (S160) to fill the gas inside the recovery tank (1110) into the second DS section (DS2) of the transmission line facility (TL) using the first vacuum pump (1310) or a compressor is as follows.

[0207] i) Turn on the heater (1130) ii) Open the ninth valve (33i) iii) Open the second valve (33b) iv) Open the fourth valve (33d) v) Turn on the first vacuum pump (1310) or compressor vi) Open the eleventh valve (33k) vii) Open the sixth valve (33f) viii) Open the second DS section gas valve measuring device (20d)

[0208] Although the present invention has been described as previously stated, those skilled in the art will readily understand that various modifications and variations are possible without departing from the concept and scope of the claims set forth below. Explanation of the symbols

[0209] 1. Gas valve measurement system 10, 10a, 10b, 10c, 10d, 10e, 10f, 10g. Gas valve measuring device 20, 20a, 20b, 20c, 20d. Gas valve measuring device 30. Recovery Filling Model Device 31. Tank Unit 32. Gas flow line 33. Valve Unit 33a, 33b, 33c, 33d, 33e, 33f, 33g, 33h, 33i, 33j, 33k. Valve 1 to Valve 11 33l. Exhaust valve 33m. Pressure booster valve 33n. Vacuum valve 33p. High-efficiency valve 34. Pump Unit 40. Vacuum apparatus 41. Suction pump 42. Vacuum System 43a. First control valve 43b. Second control valve 43c. Third control valve 100. Gas valve module 110. Gas valve 120. Handle 130. Valve Bracket 131. Discharge hole 200. Housing Unit 210. First housing 211. First Cable Hole 220. Second Housing 221. Second Cable Hole 230. Sensor support 240. Fixed member 250. Through hole 300. Magnetic material 400. Sensor Unit 410. Sensor section 420. Lamp 500. Cover Unit 510. Fastening bolt 520. Bolt fastening hole 600. Gas Injection Unit 610. Chimney hole 620. Gas inlet 1110. Recovery tank 1120. Refrigeration unit 1130. Heater 1210. Connection Channel 1220. Fluid Channel 1310. First vacuum pump 1320. Second vacuum pump TL. Transmission line facilities BB. Upper busbar section GCB. Blocking section DS1. 1st DS Part DS2. 2nd DS Part

Claims

Claim 1 A gas valve module is connected to a gas valve module that includes a gas valve extending in one direction through which gas flows and a handle that rotates to open and close the gas valve, and is capable of verifying whether the gas valve is open or closed. The sensor unit includes a housing unit detachably connected to the gas valve, a magnetic body positioned adjacent to the handle, and a sensor unit positioned in the housing unit and operated according to whether the magnetic body is adjacent. The sensor unit confirms that the gas valve is open when the magnetic body is rotated by the handle to be adjacent to the sensor unit, and confirms that the gas valve is closed when the magnetic body is rotated by the handle to be spaced apart from the sensor unit. The housing unit includes a first housing connected to one side of the gas valve and a second housing connected to the other side of the gas valve and detachably connected to the first housing. The first housing and the second housing have a through hole formed therein through which the upper portion of the gas valve passes when the first housing and the second housing are connected to the gas valve. Gas valve measuring device. Claim 2 A gas valve measuring device according to claim 1, wherein the sensor part operates depending on whether it comes into contact with the magnetic body, and is turned ON when the magnetic body is rotated in one direction by the handle and the magnetic body comes into contact with the sensor part, and is turned OFF when the magnetic body is rotated in the other direction by the handle and the magnetic body does not come into contact with the sensor part. Claim 3 In paragraph 2, the sensor unit further comprises a lamp that turns ON or OFF depending on whether the magnetic body is placed adjacently or in contact with it. Claim 4 A gas valve measuring device according to paragraph 3, wherein the lamp is lit when the magnetic body is rotated in one direction and comes into contact with the sensor part, and is extinguished when the magnetic body is rotated in the other direction and comes into contact with the sensor part. Claim 5 delete Claim 6 A gas valve measuring device according to claim 1, wherein the housing unit further comprises a fixing member that fastens the first housing and the second housing, and the first housing and the second housing have a cable hole formed through which the fixing member passes. Claim 7 A gas valve measuring device according to claim 1, wherein the handle is disposed at the upper end of the gas valve, the magnetic body is disposed at the lower end of the handle, and a sensor support is formed on one side of the second housing to which the sensor part is attached. Claim 8 In claim 7, the sensor support is a gas valve measuring device extending from one side of the second housing to a height adjacent to the magnetic body. Claim 9 A gas valve module comprising a gas valve extending in one direction through which gas flows and a handle that rotates to open and close the gas valve, a housing unit detachably connected to the gas valve, a magnetic body disposed adjacent to the handle, and a sensor unit disposed in the housing unit and operated depending on whether the magnetic body is adjacent or in contact with the sensor unit, wherein the sensor unit is turned ON so that the gas valve is confirmed to be open when the magnetic body is rotated by the handle to be adjacent to or in contact with the sensor unit, and is turned OFF so that the gas valve is confirmed to be closed when the magnetic body is rotated by the handle to be separated from or non-contact with the sensor unit, thereby allowing verification of whether the gas valve is open or closed, wherein the handle is disposed at the upper end of the gas valve and the magnetic body is disposed at the lower end of the handle, and a sensor support to which the sensor unit is attached is formed on one side of the housing unit, and the sensor support extends from one side of the housing unit to a height adjacent to the magnetic body, a gas valve measuring Device. Claim 10 delete Claim 11 A gas valve measuring device comprising: a gas valve module including a gas valve through which gas flows and a valve bracket having a discharge hole formed therein that communicates with the outside, and capable of verifying whether the gas valve module is properly connected; a cover unit detachably connected to the valve bracket to surround the circumference of the valve bracket; a gas injection unit connected to the valve bracket to communicate with the discharge hole; a magnetic body disposed in the gas injection unit; and a sensor unit disposed in the cover unit and operating depending on whether the magnetic body is adjacent to the sensor unit, wherein the sensor unit confirms that the gas injection unit is properly connected to the valve bracket when the magnetic body is disposed adjacent to the sensor unit, and confirms that the gas injection unit is abnormally connected to the valve bracket when the magnetic body is disposed spaced apart from the sensor unit. Claim 12 A gas valve measuring device according to claim 11, wherein the sensor part operates depending on whether it is in contact with the magnetic body, and is turned ON when the magnetic body is positioned to contact the sensor part, and is turned OFF when the magnetic body is positioned not to contact the sensor part. Claim 13 A gas valve measuring device according to claim 12, wherein the sensor unit further comprises a lamp that turns ON or OFF depending on whether the magnetic body is placed adjacently or in contact with the sensor part, and the lamp turns on when the magnetic body is placed adjacently or in contact with the sensor part, and turns off when the magnetic body is placed apart or not in contact with the sensor part. Claim 14 A gas valve measuring device according to claim 11, wherein the magnetic body is disposed at the upper and lower portions of the gas injection unit, the sensor portion is disposed at the lower portion of the cover unit, and when the gas injection unit is fastened to the valve bracket, the magnetic body is disposed adjacent to or in contact with the sensor portion. Claim 15 In claim 14, the sensor part is a gas valve measuring device disposed on one or more of the upper and lower parts of the cover unit. Claim 16 In claim 11, the gas injection unit has a communication hole formed in a central portion that communicates with the discharge hole, and the gas injection unit includes a gas inlet that receives gas from the outside, and the gas inlet is a gas valve measuring device connected to the communication hole so that external gas flows into the discharge hole through the communication hole. Claim 17 A gas valve measuring device according to claim 11, wherein the cover unit includes a fastening bolt for fixing the cover unit to the valve bracket, and the cover unit has a bolt fastening hole formed therein through which the fastening bolt passes. Claim 18 A gas valve measuring system comprising: one or more gas valve measuring devices connected to a gas valve of a power transmission line facility and capable of verifying whether the gas valve is open / closed or properly closed; and a recovery / filling model device for recovering gas from the power transmission line facility through the gas valve measuring device or filling the recovered gas into the power transmission line facility through the gas valve measuring device, wherein the recovery / filling model device comprises a tank unit including a recovery tank receiving gas recovered from the gas valve measuring device; a gas flow line including a plurality of channels providing a path for gas to flow between the gas valve measuring device and the recovery tank; and a valve unit including a plurality of valves disposed in the plurality of channels and opened / closed to allow or block the flow of gas. Claim 19 In claim 18, the valve unit and the plurality of gas valve measuring devices are optionally a gas valve measuring system that recovers gas within the gas valve measuring device to a recovery tank or fills gas within the recovery tank to the gas valve measuring device. Claim 20 In claim 19, the recovery filling model device further comprises a pump unit for recovering gas within the transmission line facility to the recovery tank, wherein the pump unit comprises a first vacuum pump for recovering gas within the transmission line facility to the recovery tank and a second vacuum pump for recovering gas within the transmission line facility to the recovery tank. Claim 21 In paragraph 20, the first vacuum pump is a gas valve measuring system that fills the gas in the recovery tank into the transmission line facility. Claim 22 In claim 20, the second vacuum pump is a gas valve measuring system that recovers gas within the transmission line facility to the recovery tank with a higher output than the first vacuum pump. Claim 23 In claim 18, the above recovery filling model device is a gas valve measuring system further comprising a vacuum device connected to the above gas valve measuring device, which removes residual gas within the transmission line facility and measures residual gas within the transmission line facility. Claim 24 In paragraph 23, the vacuum device is connected to the gas valve measuring device and comprises a suction pump that sucks in and removes residual gas within the transmission line facility, and a vacuum gauge connected to the gas valve measuring device that measures residual gas within the transmission line facility. Claim 25 A gas valve measuring system according to claim 18, wherein the tank unit further comprises a chiller for cooling the recovery tank which is heated when the gas in the transmission line facility is recovered to the recovery tank, and a heater for heating the recovery tank which is cooled when the gas in the recovery tank is filled into the transmission line facility. Claim 26 A gas valve measuring method using a gas valve measuring system according to any one of claims 18 to 25, comprising: a recovery tank vacuum forming step of removing gas within the recovery tank to form a vacuum inside the recovery tank; a natural recovery step of recovering gas within the transmission line facility into the recovery tank by a pressure difference using the valve unit and a plurality of the gas valve measuring devices; a mechanical recovery step of recovering gas within the transmission line facility into the recovery tank using a pump unit; a natural filling step of filling gas within the recovery tank into the transmission line facility by a pressure difference using the valve unit and a plurality of the gas valve measuring devices; and a mechanical filling step of filling gas within the recovery tank into the transmission line facility using the pump unit. Claim 27 A gas valve measurement method according to claim 26, further comprising a transmission line facility vacuum formation step performed between the mechanical recovery step and the natural filling step, wherein residual gas within the transmission line facility is removed by a vacuum device to form a vacuum inside the transmission line facility, and residual gas within the transmission line facility is measured. Claim 28 A gas valve measurement method according to claim 27, wherein the vacuum forming step of the transmission line facility comprises a residual gas removal step of removing residual gas within the transmission line facility by sucking it in with a suction pump, and a residual gas measurement step of measuring residual gas within the transmission line facility with a vacuum gauge. Claim 29 A gas valve measuring method according to claim 26, wherein the mechanical recovery step comprises a first mechanical recovery step of recovering gas within the transmission line facility into the recovery tank using a first vacuum pump, and a second mechanical recovery step of recovering gas within the transmission line facility into the recovery tank using a second vacuum pump. Claim 30 In claim 29, a gas valve measurement method for recovering gas within the transmission line facility to the recovery tank with a higher output than in the first mechanical recovery step in the second mechanical recovery step. Claim 31 In claim 26, a gas valve measuring method in which, in the mechanical filling step, the gas in the recovery tank is filled into the transmission line facility using a first vacuum pump.

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