UHF partial discharge detection sensor having leak-tight structure

Abstract

Disclosed is a UHF partial discharge detection sensor having a leak-tight structure. A UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention comprises: a flange part having a through-hole provided therein; an electrode rod inserted through the through-hole provided in the flange part; a sensor part provided at the upper end of the electrode rod to detect a partial discharge ultra-high frequency wave; an airtight member provided between the electrode rod and the flange part; and a cover member for supporting the lower end of the airtight member.

Description

UHF partial discharge detection sensor with leak-tight structure

[0001] The present invention is for detecting partial discharge occurring inside a gas-insulated switchgear, and more specifically, relates to a sensor for detecting partial discharge in a gas-insulated switchgear.

[0002] Partial discharge (PD) refers to a discharge phenomenon that occurs locally around or inside an insulator under high voltage stress. In addition to causing continuous power loss due to power leakage, if the effect accumulates, it can cause irreversible physical or chemical changes to the insulating material, which can completely stop the power supply to the device where the partial discharge occurred or, in severe cases, cause the device to explode.

[0003] Therefore, in order to ensure normal operation of the device, it is important to detect the partial discharge discussed above and prevent accidents in advance. In the case of gas-insulated switchgear, in the past, an external sensor for detecting partial discharge was attached to the outer surface of the device to detect the presence of partial discharge.

[0004] In such cases, due to the nature of the power equipment, there is a problem in which the sensor malfunctions or the reliability of the measurement results decreases due to the noise generated from the equipment or devices that generate strong electromagnetic waves being placed in the vicinity.

[0005] To improve these problems, Korean Patent Publication No. 10-085827, a prior art, discloses a switch diagnostic device that can diagnose the cause of a defect without dismantling the operating power equipment, and in particular, can diagnose external noise and defects, and Korean Patent Publication No. 10-0893396 discloses a partial discharge detection device that detects partial discharge occurring during operation of a gas insulated device using a built-in sensor.

[0006] However, in the case of conventional technology, there is a risk of leakage of insulating gas due to damage to the welding area, etc. when an impact occurs.

[0007] Therefore, research is needed on a UHF partial discharge detection sensor having a leak-tight structure that can prevent leakage of insulating gas without damage or deformation even when a strong impact is applied to the partial discharge detection sensor and assembly.

[0008] The purpose of the present invention is to provide a UHF partial discharge detection sensor having a leak-tight structure that can effectively prevent leakage of insulating gas by preventing breakage or deformation of the welding area and maintaining internal airtightness when an impact occurs, by forming a protrusion corresponding to the ceramic part on the flange part, unlike a conventional structure in which a ceramic part is welded to a flange part.

[0009] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems to be solved by the present invention that are not mentioned herein can be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0010] A UHF partial discharge detection sensor having a leak-tight structure according to one embodiment of the present invention includes a flange portion having a through hole formed therein, an electrode rod inserted through the through hole formed in the flange portion, a sensor portion provided at the upper end of the electrode rod for detecting partial discharge ultra-high frequency, a sealing member provided between the electrode rod and the flange portion, and a cover member supporting the lower end of the sealing member.

[0011] In addition, the flange portion is formed integrally, including a bottom portion provided in the shape of a circular plate with a first diameter and a protrusion provided in the shape of a cylinder with a second diameter protruding from the center of the bottom portion, and the through hole is formed through the center of the bottom portion and the protrusion, and the first diameter is characterized in that it is larger than the second diameter.

[0012] Additionally, the confidential member is characterized by including a first O-ring coupled to the bottom surface of the flange portion and a second O-ring coupled to the inner circumferential surface of the protrusion of the flange portion.

[0013] In addition, the cover member is characterized in that a mounting groove is formed on one surface, and a mounting member is inserted into the mounting groove to support the lower end of the sealing member.

[0014] In addition, the sealing member is characterized in that a fastening protrusion of a preset pattern is formed on one side of a lower section that comes into contact with the securing member, a fastening groove corresponding to the fastening protrusion is formed on one side of a surface of the sealing member that comes into contact with the lower section of the sealing member, and a first filler is applied to a joint surface of the securing member and the sealing member to fill an air gap between the securing member and the sealing member.

[0015] According to the present invention, by including a flange portion having a protrusion formed therein, when an impact occurs, damage or deformation of the welding portion is prevented, and internal airtightness is maintained, thereby effectively preventing leakage of insulating gas.

[0016] FIG. 1 is a configuration diagram of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0017] FIG. 2 and FIG. 3 are drawings for explaining the flange portion of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0018] FIG. 4 is a drawing for explaining a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0019] FIG. 5 is a drawing for explaining a cover member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0020] FIG. 6 is a perspective view of a cover member and a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0021] FIG. 7 and FIG. 8 are drawings for explaining the combination of a cover member and a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0022] FIGS. 9 to 12 are drawings for explaining a conventional technology of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention.

[0023] Specific details, including the problems to be solved, means of solving them, and effects of the invention, are included in the embodiments and drawings described below. The advantages and features of the present invention, and methods for achieving them, will become clearer with reference to the embodiments described below in detail, along with the accompanying drawings.

[0024] The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by a person having ordinary knowledge in the relevant technical field without departing from the technical spirit of the present invention.

[0025] Hereinafter, the title of the invention of the present invention is described in detail with reference to the attached drawing 1.

[0026] FIG. 1 is a configuration diagram of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention, FIG. 2 and FIG. 3 are drawings for explaining a flange part of a UHF partial discharge detection sensor having a leak-tight structure according to another embodiment of the present invention, FIG. 4 is a drawing for explaining a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention, FIG. 5 is a drawing for explaining a cover member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention, FIG. 6 is a perspective view of a cover member and a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention, FIG. 7 and FIG. 8 are drawings for explaining the combination of a cover member and a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention, and FIG. 9 to FIG. 12 are drawings for explaining a combination of a cover member and a sealing member of a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention. This is a drawing for explaining a prior art UHF partial discharge detection sensor having a leak-tight structure.

[0027]

[0028] Example 1

[0029] Referring to FIG. 1, a UHF partial discharge detection sensor (100) having a leak-tight structure according to an embodiment of the present invention may include a flange portion (110), an electrode rod (120), a sensor portion (130), a sealing member (140), and a cover member (150).

[0030] More specifically, the flange portion (110) has a through hole formed therein, the electrode rod (120) is inserted through the through hole formed in the flange portion (110), the sensor portion (130) is provided at the upper end of the electrode rod (120) to detect partial discharge ultra-high frequency, the sealing member (140) is provided between the electrode rod (120) and the flange portion (110), and the cover member (150) can support the lower end of the sealing member (140).

[0031] For example, the flange portion (110) can be manufactured from aluminum forging.

[0032]

[0033] As shown in Fig. 2, the flange portion (110) may be formed as an integral part including a bottom portion (111) provided in the shape of a circular plate having a first diameter and a protrusion portion (112) provided in the shape of a cylinder having a second diameter by protruding from the center of the bottom portion (111).

[0034] On the other hand, as shown in FIG. 9, in the case of the conventionally disclosed partial discharge detection sensor, the flange (510) and the ceramic assembly (520) can be joined through welding.

[0035] At this time, referring to FIGS. 10 to 12, when a horizontal impact (C1) occurs on the sensor, the joint at the welding portion is separated, and when a vertical impact (C2) is applied, the model of the electrode rod inserted into the flange portion (510) is deformed, and the ceramic assembly (520) is damaged, so there is a disadvantage in that it is vulnerable to impact.

[0036]

[0037] That is, since the flange portion (110) is formed as an integral piece of aluminum, the conventional partial discharge detection sensor formed of stainless steel is heavy and has difficulties such as safety accidents in a one-person work environment or a high-altitude work environment.

[0038] In addition, in order to form a ceramic assembly and flange into an integrated structure, the sizes of spacers, electrodes, electrode patches, etc. must be changed in the past, which causes a problem of performance degradation such as a decrease in sensor sensitivity.

[0039]

[0040] In addition, in order to manufacture an integrated structure while using a conventional ceramic assembly as is, a flange reflecting the adapter shape of the ceramic assembly must first be processed, and after the flange processing, an electrolytic polishing process can be performed to smooth the metal surface.

[0041] Afterwards, the ceramic assembly and the flange are joined through welding processing, but there is a problem that it is difficult to form an integral structure while using the ceramic assembly as it is because the chemicals used in the polishing process of the flange may react with the ceramic assembly and cause discoloration, etc.

[0042]

[0043] In contrast, the UHF partial discharge detection sensor (100) having a leak-tight structure of the present invention is provided in a shape in which the flange (510) and the ceramic assembly (520) are integrally combined, so that welding between the flange (510) and the ceramic assembly (520) is unnecessary, and leakage of insulating gas due to damage upon impact can be effectively prevented.

[0044] That is, in the case of the present invention, as shown in FIG. 3, since there is no joint part due to welding or the like, the shape of the flange portion (110) can be stably maintained without cracks or breakage even under horizontal impact (C1) and vertical impact (C2), thereby ensuring airtightness of the internal space.

[0045] In addition, since it is made of an integrated aluminum material, the sensor can be made lighter, problems such as discoloration due to chemical reaction with chemicals can be effectively prevented, and leakage of insulating gas can be effectively prevented without performance degradation such as a decrease in sensor sensitivity.

[0046]

[0047] Meanwhile, the through hole is formed by penetrating the center of the bottom portion (111) and the protrusion (112), and the first diameter can be formed to be larger than the second diameter.

[0048] As another example, the diameter of the through hole can be determined corresponding to the shape of the electrode rod (120).

[0049]

[0050] Meanwhile, referring to FIG. 4, the sealing member (140) includes a first O-ring (141) coupled to the surface of the bottom portion (111) of the flange portion (110) and a second O-ring (142) coupled to the inner circumferential surface of the protrusion (112) of the flange portion (110), thereby forming a double sealing structure and effectively preventing leakage of insulating gas.

[0051] To this end, the bottom portion (111) and the protrusion (112) may include a mounting groove in which the first O-ring (142) and the second O-ring (142) are mounted.

[0052] Accordingly, the sealing member (140) is coupled to the flange portion (110), and the first O-ring (142) and the second O-ring (142) are secured inside the flange portion (110), so that the sealing member (140) can be stably mounted to the flange portion (110) even under horizontal impact (C1) and vertical impact (C2), and the sealing property can be further improved.

[0053]

[0054] Meanwhile, referring to FIG. 5, the cover member (150) has a mounting groove (151) formed on one surface, and a mounting member (152) is inserted into the mounting groove (151) to support the lower end of the sealing member (140).

[0055] Here, the height of the securing member (152) can be formed higher than the depth of the securing groove (151), and through this, the securing member (152) can prevent the sealing member (140) from being detached.

[0056] At this time, the sealing member (140) and the cover member (150) are provided with at least one hole penetrating the surface, and by fastening the bolt with the positions of the holes of the sealing member (140) and the cover member (150) aligned, the sealing member (140) and the cover member (150) can be more firmly connected.

[0057]

[0058] As another example, referring to FIGS. 6 to 8, the sealing member (140) may have a fastening protrusion (143) of a preset pattern formed on one side of the lower cross-section that comes into contact with the securing member (152), and the securing member (152) may have a fastening groove (153) formed corresponding to the fastening protrusion (143) on one side of the surface that comes into contact with the lower cross-section of the sealing member (140).

[0059] Accordingly, by combining the fastening projection (143) of the sealing member (140) with the fastening groove (153) of the fixing member (152), the detachment of the sealing member (140) can be prevented even by impact, etc.

[0060] In addition, a first filler may be applied to the joint surface of the securing member (152) and the sealing member (140) so that the air gap between the securing member (152) and the sealing member (140) may be filled.

[0061] For example, the first filler may be provided in the form of a paste made of a metal material.

[0062]

[0063] Example 2

[0064] For example, a partial discharge detection system using a UHF partial discharge detection sensor (100) having the above-described leak-tight structure may include a sensing data collection unit, a leakage determination unit, a sensor error determination unit, and a wireless communication unit.

[0065] The above sensing data collection unit can collect data collected from the UHF partial discharge detection sensor (100) having the leak-tight structure at preset intervals.

[0066] In addition, the sensor error determination unit determines the reliability of data collected from the sensing data collection unit, and if the reliability of the data exceeds a preset reference value, the data collected from the sensor data collection unit can be transmitted to the leakage determination unit.

[0067] For example, the reliability of the data can be calculated based on the average value and standard deviation of the data collected over a preset first unit time period.

[0068] The above leakage determination unit determines whether there is a leakage of insulating gas using only data whose reliability has been verified through the above error determination unit, and as soon as a leakage of the insulating gas is detected, it transmits a call signal to a preset manager (user) terminal through the wireless communication unit, and can also cause an emergency stop of the operation of the power equipment in which the UHF partial discharge detection sensor (100) having the leakage-tight structure is installed.

[0069]

[0070] More specifically, the sensing data collection unit is provided with a comparison sensor as the same sensor within a preset first radius from the measurement sensor, which is a UHF partial discharge detection sensor (100) having the leak-tight structure, and the sensor error determination unit uses data collected from the measurement sensor and the comparison sensor and the comparison target time to determine the sensor failure probability (S TR ) can be produced.

[0071] In addition, the sensing error determination unit can extract a comparison target time, which is a time when the rate of change in the measured value of data collected from the measurement sensor exceeds a preset first rate.

[0072] At this time, the first radius has a higher accuracy when compared as it gets closer to the measurement sensor, but is ideally located within a radius of 10 mm to 500 mm from the center position of the measurement sensor, and the first ratio can be set to a ratio of 25% to 30%, and the setting can be changed from a minimum of 10% to a maximum of 90% depending on the type of the measurement sensor and the surrounding environment.

[0073]

[0074] In addition, a method for calculating the rate of change in the measured value of the sensing data is provided, wherein the measured value T measured at time t2 within the time range of the sensing data collected by the sensing data collection unit t2 t in a The measurement value T measured at time t1, which is a time interval t1 T minus the value t1 The absolute value can be calculated as the rate of change in the measurement by dividing the measurement value and multiplying by 100.

[0075]

[0076] For example, if the time interval set through the above administrator terminal is 2 seconds, the total measurement time from the operation of the current measurement sensor, the UHF partial discharge detection sensor, to the end is 2,000 seconds, the measurement value measured at 1,520 seconds is 25, and the measurement value measured at 1,518 seconds is 36.6, the measurement value change rate can be calculated as 46.4% (100*(25-36.6) / 25). At this time, if the rate set through the above administrator terminal is 30%, 1,518 seconds can be extracted as the comparison target time because the measurement value change rate exceeds 30%.

[0077] Meanwhile, if the sensor error judgment unit does not extract a time at which the rate of change in the measured value exceeds a preset rate, the sensing data corresponding to n arbitrary times in the sensing data can be extracted as a time to be compared.

[0078] Here, the method of extracting n visual points within the sensing data can be performed using a program using a programming language, and the programming language can mean Python, Java, C language, C++, JavaScript, Go, Ruby, Swift, Kotlin, PHP, C# (C Sharp), etc.

[0079] For example, a method for extracting n random times from sensing data using Python can be done by setting a time range in which the sensor operates in the sensing data using the Random module and the Datetime module and then extracting n random times, or by using the Numpy module.

[0080] Additionally, another method for extracting n time points within the sensing data is to randomly extract n time points within the sensing data by applying the Fisher-Yates shuffle algorithm to the time range of the sensing data.

[0081]

[0082] Meanwhile, in the n time points extracted from the above sensor error determination unit, n means a natural number that may vary depending on the operating environment set through the above administrator terminal, and the meaning of the above arbitrary time point may mean a time point extracted in a random format without regularity from the entire time collected from the sensing data.

[0083]

[0084] Through the above process, the sensing data collection unit can transmit sensing data, which is a set of measurement values ​​collected from at least two or more measurement sensors, to the administrator terminal through the wireless communication unit, and can distinguish a section in which the change rate of the sensing data does not exceed a preset change rate in response to a set time interval through the administrator terminal as a 'standard state section', and distinguish a section in which the change rate exceeds the preset change rate as an 'abnormal state section'.

[0085]

[0086] Meanwhile, the sensor error judgment unit determines the sensor failure probability (S) according to the following [Mathematical Formula 1]. TR ) can be produced.

[0087]

[0088] [Mathematical Formula 1]

[0089]

[0090] (Here, S TR is the probability of sensor failure, T ms1 is the measurement value of the measurement sensor at the first time, T ms2 is the measurement value of the measurement sensor at the second time, T ms3 is the measurement value of the measurement sensor at the third time, T msn is the measurement value of the measurement sensor at the nth time, T cst1 is the measurement value of the comparison sensor at the first time, T cst2 is the measurement value of the comparison sensor at the second time, T cs3 is the measurement value of the comparison sensor at the third time, T csn is the measurement value of the comparison sensor at the nth time, T msav is the average measurement value of the measurement sensor, and SE means the efficiency deviation of the measurement sensor.)

[0091]

[0092] At this time, the efficiency deviation (SE) of the above measurement sensor is calculated according to [Mathematical Formula 2] below, and the average efficiency of the above measurement sensor can be calculated according to [Mathematical Formula 3] below.

[0093]

[0094] [Equation 2]

[0095]

[0096] (Here, SE av is the average efficiency of the measuring sensor, SE i refers to the initial efficiency of the measuring sensor)

[0097]

[0098] [Equation 3]

[0099]

[0100] (Here, W IN1 is the power supplied to the measurement sensor at the first time, W OUT1 The power measured when the measurement value sensed by the measurement sensor at the first time is output as an electrical signal, W IN2 is the power supplied to the measurement sensor at the second time, W OUT2 The power measured when the measurement value sensed by the measurement sensor at the second time is output as an electrical signal, W INn is the power supplied to the measurement sensor at the nth time, W OUTn It means the power measured when the measurement value sensed by the measurement sensor at the nth time is output as an electrical signal.

[0101]

[0102] At this time, the n time points mentioned in the above [Mathematical Formula 1] to [Mathematical Formula 3] may mean the number of multiple time points or randomly extracted time points at which the rate of change in the measured value of the sensing data extracted from the error determination unit exceeds a preset rate.

[0103]

[0104] For example, in a state where a first partial discharge detection sensor provided as the above-described measurement sensor and a second partial discharge detection sensor provided as a comparison sensor of the same model as the above-described partial discharge detection sensor and within a radius of 10 mm are provided, the sensing data collection unit may measure the input / output voltage of the first partial discharge detection sensor and the current consumption inside the measurement sensor.

[0105] At this time, when three times are extracted from the measurement sensor, and the voltage supplied during the extracted first to third times is 4.9 V, 5 V, and 5 V, and the measurement sensor consumes currents of 1 mA, 0.9 mA, and 1.1 mA at the corresponding times and is measured to output 10 mV, 9 mV, and 11 mV, the input power (W) at the first time supplied to the measurement sensor IN1 ) is 0.0049W (4.9V * 0.001A), and the input power at the second time (W IN2 ) is 0.0045W (5V * 0.0009A), and the input power at the third time point (W IN3 ) can be calculated as 0.0055W (5V * 0.0011A). In addition, the output power (W) of the first time output from the measurement sensor out1 ) is 0.00001W (0.01V * 0.001A), the output power of the second time (W OUT2- ) is 0.000081W (0.009V * 0.0009A), the output power at the third time (W OUT3 ) can be calculated as 0.0000121W (0.011V*0.0011A).

[0106] In addition, the average efficiency (SE) of the above measurement sensor av ) is 0.2(100 / 3*(0.00001 / 0.0049+0.000081 / 0.0045+0.0000121 / 0.0055)) based on the above [Mathematical Formula 2], and the initial efficiency (SE) provided by the manufacturer of the measurement sensor i ) is 0.2%, the efficiency deviation (SE) of the measurement sensor can be calculated as 0 based on the above [Mathematical Formula 3].

[0107] Average efficiency (SE) of the above measurement sensor av ) is judged to be an efficient sensor the lower the output value, and the average efficiency (SE) of the above measurement sensor av) is judged to be an efficient sensor the lower the output value, and as the output value increases compared to the initial efficiency, it can be judged that the probability of failure in the electrical domain of the sensor is high.

[0108] Meanwhile, the initial efficiency (SE) of the above measurement sensor i ) is not provided, the initial efficiency (SE) is the efficiency measured under preset conditions through the sensing data collection unit. i ) can also be set.

[0109]

[0110] Additionally, sensing data according to the operation of the first partial discharge detection sensor may be collected from 0 seconds to 2,700 seconds. At this time, the average measurement value of the first partial discharge detection sensor (measurement sensor) may be 35, and the measurement values ​​measured at three randomly extracted times through the program may be extracted as 29 (485 seconds), 35 (1893 seconds), and 41 (2021 seconds).

[0111] In addition, when the measurement values ​​measured at the same time and each time from the second partial discharge detection sensor (comparison sensor) operating simultaneously with the first partial discharge detection sensor are 30.1 (485 seconds), 32.5 (1893 seconds), and 43 (2021 seconds), the failure probability (S) of the first partial discharge detection sensor TR ) can be calculated as approximately 5.33% (Min((|29-30.1|+|35-32.5|+|41-43|) / (3*35)*100+0), 100) based on the above [Mathematical Formula 1].

[0112]

[0113] As another example, the sensor error judgment unit reflects the weight according to the distance between the measurement sensor and the comparison sensor, and calculates the sensor failure probability (S) according to the following [Mathematical Formula 1-2]. TR ) can also be produced.

[0114]

[0115] [Equation 1-2]

[0116]

[0117] (Here, D v refers to the distance weighting of the measurement sensor and the comparison sensor)

[0118]

[0119] At this time, the distance value weight (D-) of the above measurement sensor and comparison sensor v ) is applied in response to the weight set through the user terminal, and the weight may be changed.

[0120]

[0121] Therefore, according to the present invention as described above, the purpose is to provide a UHF partial discharge detection sensor having a leak-tight structure that can effectively prevent leakage of insulating gas by preventing breakage or deformation of a welding area and maintaining internal airtightness when an impact occurs by including a flange portion having a protrusion formed therein.

[0122]

[0123] In addition, a method for controlling a partial discharge detection system using a UHF partial discharge detection sensor having a leak-tight structure according to an embodiment of the present invention may be recorded on a computer-readable medium including program commands for performing various computer-implemented operations. The computer-readable medium may include program commands, data files, data structures, etc., singly or in combination. The program commands may be specially designed and configured for the present invention or may be known and usable by those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0124]

[0125] Although the embodiments of the present invention have been described with limited examples and drawings, the embodiments of the present invention are not limited to the embodiments described above, and various modifications and variations are possible based on this description by those skilled in the art to which the present invention pertains. Therefore, the embodiments of the present invention should be understood solely by the scope of the claims set forth below, and all equivalent or equivalent modifications thereof are deemed to fall within the scope of the present invention.

[0126]

[0127] 110: Flange 111: Bottom

[0128] 112: Protrusion

[0129] 120: Electrode rod

[0130] 130: Sensor section

[0131] 140: Absence of confidentiality 141: First O-ring

[0132] 142: Second O-ring

[0133] 143: Fastening protrusion

[0134] 150: Cover member 151: Fixing groove

[0135] 152: Absence of settling

[0136] 153: Contract Home

Claims

1. A flange portion having a through hole provided inside; An electrode rod inserted through the through hole provided in the flange portion; A sensor unit provided at the top of the electrode rod to detect partial discharge ultra-high frequency; A sealing member provided between the electrode rod and the flange portion; and A cover member supporting the lower part of the above confidential member; A UHF partial discharge detection sensor having a leak-tight structure including:

2. In paragraph 1, The above flange part, A bottom portion provided in the shape of a circular plate of the first diameter; and It is formed as an integral part, including a protrusion formed in the shape of a cylinder with a second diameter and protruding from the center of the above-mentioned bottom part; The above penetration hole is, It is formed by penetrating the center of the above bottom portion and the above protrusion, A UHF partial discharge detection sensor having a leak-tight structure, characterized in that the first diameter is larger than the second diameter.

3. In paragraph 2, The above confidentiality is, A first O-ring coupled to the bottom surface of the flange portion; and A UHF partial discharge detection sensor having a leak-tight structure, characterized by including a second O-ring coupled to the inner surface of the protrusion of the flange portion.

4. In paragraph 1, The above cover member, A settling groove is formed on one side, A UHF partial discharge detection sensor having a leak-tight structure, characterized in that a mounting member is inserted into the mounting groove to support the lower end of the sealing member.

5. In paragraph 4, The above confidentiality is, A fixing protrusion of a preset pattern is formed on one side of the lower section that comes into contact with the above-mentioned fixing member, The above-mentioned fixing member is, A fastening groove corresponding to the fastening projection is formed on one side of the surface that comes into contact with the lower section of the above-mentioned confidential member, A UHF partial discharge detection sensor having a leak-tight structure, characterized in that a first filler is applied to the joint surface of the mounting member and the sealing member to fill the air gap between the mounting member and the sealing member.

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