KR102668627B1 - Picking device of insulated oil for oil filled cable - Google Patents

Abstract

The present invention relates to an insulating oil sampling device for an inflow cable, which includes a connector connection part connected to the connector part for insulating oil sampling of the inflow cable, an insulating passage part forming a discharge path of insulating oil through the connector connection part, and a valve part that opens and closes the insulating oil passage part. and an insulator, and a valve insulating part disposed between the connector connection part and the valve part.

Description

{PICKING DEVICE OF INSULATED OIL FOR OIL FILLED CABLE}

The present invention relates to an insulating oil sampling device for an inflow cable, and more specifically, to an insulating oil sampling device for an inflow cable to sample the insulating oil inside the inflow cable.

In general, underground transmission lines use XLPE cables that maintain the insulation of the line with cross-linked polyethylene (XLPE), and insulating oil is mixed inside the cable to maintain the insulation of the line. , Oil Filled) cables are installed and operated in two types. The insulation performance of the inflow cable is determined by the degree of insulation deterioration of the insulating oil. To diagnose this, the insulating oil inside the inflow cable is periodically collected and gas analysis is performed.

However, in the past, insulating oil extraction work was inevitably accompanied by a cease-fire of underground transmission lines, which resulted in work time constraints depending on the cease-fire and pressurization (end of cease-fire) time, which became a factor in quality and safety management vulnerabilities. In addition, grounding and confirmation work due to a ceasefire is required, which results in additional unit time, and it is difficult to ensure worker safety in the event of overvoltage during work. When collecting insulating oil from a multi-line accommodating manhole, work is done only on the ceasefire line, resulting in duplication of manhole drainage, etc. There was a problem that costs were incurred.

In addition, there are difficulties in collecting and analyzing insulating oil for all junction boxes of incoming cables. More specifically, it takes a long time to collect insulating oil, and the resulting costs are excessive, so insulating oil is only collected from one of the plurality of connection boxes installed in one refueling section that supplies insulating oil. am. In addition, there is a problem that it is difficult to predict the initial stage of failure by analyzing the insulating oil collected from a location far away from the deteriorated area due to the low mobility of the insulating oil within the inflow cable.

In addition, it is inconvenient to fasten and dismantle the portable sampling valve to the connector of the cable junction box every time the insulating oil sampling work is performed. In addition, when fastening and dismantling the sampling valve to the connector of the connection box, the insulating oil in the cable connection box scatters to the outside and is lost, and additional insulating oil supply work is required due to the loss of insulating oil inside the cable, and additional costs are incurred. In addition, there is a possibility that rapid hydraulic pressure fluctuations may occur due to loss of insulating oil, and there are concerns that it may cause equipment failure and prolonged power outages. In addition, there is a problem in that the watertight performance is reduced due to wear of the fastening part of the valve due to frequent repeated fastening and disassembling operations.

The background technology of the present invention is disclosed in Korean Patent Publication No. 2004-0080281 (published on September 18, 2004, title of the invention: Oil collection structure in a live wire state).

The present invention not only makes it possible to collect insulating oil at all times without a power outage of the line, but also prevents scattering and loss of insulating oil, and makes it possible to simply collect insulating oil for inflow cables without engaging or disengaging the junction box connector. The purpose is to provide an insulating oil sampling device for cables.

The insulating oil sampling device for an inflow cable according to the present invention includes a connector connection part connected to a connector part for insulating oil sampling of an inflow cable; an insulating passage part forming a discharge path of insulating oil through the connector connection part; A valve unit that opens and closes the insulated flow path unit; and a valve insulating part that includes an insulator and is disposed between the connector connection part and the valve part.

The connector connection part includes a connection body part in which the insulating flow path part is formed; a connector fastening portion formed on one end of the connection body portion and fastened to the connector portion; and a first insulator connection portion formed at the other end of the connection body portion and coupled to the valve insulator portion.

The connector fastening portion includes a nut support portion formed to protrude from the connection body portion and an end of which is in contact with the connector portion; a connection nut portion rotatably coupled to the nut support portion and fastened to the connector portion; and a connection stopper portion that is formed to protrude from the nut support portion and restrains separation of the connection nut portion.

The insulating passage portion may include an inflow passage portion formed inside the connector connection portion; A discharge passage portion formed inside the valve portion; and an intermediate passage portion formed inside the valve insulating portion to communicate with the inflow passage portion and the discharge passage portion.

The valve part includes a valve body part in which the insulating flow path part is formed; An opening/closing control unit having the structure of a valve that opens and closes the insulated flow path unit and coupled to the valve body unit; a second insulator connection portion formed at one end of the valve body portion and coupled to the valve insulator portion; and a cap portion detachably coupled to the other end of the valve body and closing the insulating passage portion.

The valve body portion includes a first body portion connected to the opening/closing control portion; a second body portion connected to the second insulator connection portion; and a valve management connection part that detachably connects the first body part and the second main body part to each other.

The valve management connection part includes a management bolt part formed in the first body part; a management nut portion rotatably coupled to the second body portion and fastened to the management bolt portion; and a management stopper portion formed to protrude from the second body portion and restraining the management nut portion from leaving.

The valve management connection part includes a first tapered portion formed to be tapered on an inner diameter portion of the first body portion; and a second tapered portion that is formed to be tapered on the outer diameter portion of the second body portion and contacts the first tapered portion when the management bolt portion and the management nut portion are fastened.

The cap portion includes a stopper portion that contacts the valve body portion and closes the insulating passage portion; and a stopper fixing part that detachably couples the stopper to the valve body.

The valve insulation portion includes an insulating pipe portion that includes an insulator and is disposed between the connector connection portion and the valve portion; a first fastening member connecting one end of the insulating pipe portion with the connector connection portion; a second fastening member connecting the other end of the insulating pipe portion to the valve portion; a first sealing member disposed between the connector connection portion and the insulating pipe portion; and a second sealing member disposed between the valve portion and the insulating pipe portion.

The insulating pipe portion has a cylindrical shape with both ends open, the connector connection portion and the end of the valve portion in contact with the insulating pipe portion have a flange shape and are in surface contact with the insulating pipe portion, and the first fastening member and the second fastening member It is characterized in that it is coupled to the insulating pipe portion by a fastening member.

The present invention is characterized in that it further includes an insulating cover part that includes an insulating material and covers the connector connection part and the valve insulating part.

The insulating cover part includes a first cover part including an insulating material and covering the valve insulating part; and a second cover portion including an insulating material and continuously covering the connector portion and the connector connection portion.

The second cover part includes a main cover part covering the connector part and the connector connection part; and a laminated cover part formed continuously with the main cover part and covering the first cover part.

The insulating oil sampling device for inflow cables according to the present invention quickly and easily extracts insulating oil for inflow cables with a simple operation of opening and closing the valve section, omitting the process of shutting down the line while stably securing the insulation state with the valve insulating section. It can be harvested easily.

In the present invention, since a line cease-fire is not involved during the insulating oil extraction work, there are no restrictions on work time depending on the cease-fire and pressurization (end of cease-fire) time, and additional work such as grounding work and confirmation of the line and site are omitted, thereby reducing work time. It can be significantly shortened, and simultaneous work on multiple lines within a manhole is possible in a live line, preventing duplication of manhole drainage and shortening the work time accordingly. In addition, the valve insulation unit 40 can ensure the safety of workers even in the event of abnormal voltage or moisture.

In addition, the present invention reduces the time required for insulating oil sampling work and reduces costs such as labor costs, making it possible to sample and analyze insulating oil throughout a plurality of junction boxes connected to inflow cables. Accordingly, the reliability of diagnosing deterioration of insulating oil and predicting the initial stage of failure of the inflow cable can be further improved.

In addition, the present invention eliminates the need for repeated screw fastening and disassembly work to directly open and close the connector part provided in the connection box when collecting insulating oil, thereby solving damage such as wear of the fastening part due to frequent fastening and disassembly of screws. there is. In addition, it is possible to prevent insulating oil from scattering or being lost when opening and closing the connector part directly, and to prevent sudden hydraulic pressure fluctuations due to insulating oil loss, fundamentally preventing equipment failure and prolonged power outages due to rapid hydraulic pressure fluctuations in the inflow cable. You can.

In this way, the present invention can improve construction quality, safety management, and power system stability by eliminating the need for line outages, improve the reliability of diagnosing insulation deterioration of inflow cables by expanding the insulating oil collection point, and directly connect the connector part. Because fastening and disassembly work to open and close is unnecessary, work convenience can be increased and the factors causing equipment failure can be eliminated.

Figure 1 is a side view schematically showing an insulating oil sampling device for an inflow cable according to an embodiment of the present invention.
Figure 2 is a cross-sectional view schematically showing an insulating oil sampling device for an inflow cable according to an embodiment of the present invention.
Figure 3 is an exploded cross-sectional view of the main part of the insulating oil sampling device for inflow cables according to an embodiment of the present invention.
Figure 4 is a partial cross-sectional view showing a connector connection portion of an insulating oil sampling device for an inflow cable according to an embodiment of the present invention.
Figure 5 is a partial cross-sectional view showing the valve portion of the insulating oil sampling device for inflow cables according to an embodiment of the present invention.
Figure 6 is a partial cross-sectional view showing the valve insulation part of the insulating oil sampling device for the inflow cable according to an embodiment of the present invention.

Hereinafter, an embodiment of an insulating oil sampling device for an inflow cable according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

Figure 1 is a side view schematically showing an insulating oil sampling device for an inflow cable according to an embodiment of the present invention, and Figure 2 is a cross-sectional view schematically showing an insulating oil sampling device for an inflow cable according to an embodiment of the present invention. Figure 3 is an exploded cross-sectional view of the main part of the insulating oil sampling device for inflow cables according to an embodiment of the present invention.

Referring to Figures 1 to 3, the insulating oil sampling device 1 for an inflow cable according to an embodiment of the present invention includes a connector connection part 10, an insulating passage part 20, a valve part 30, and a valve insulating part ( 40), characterized in that it includes an insulating cover part 50.

The connector connection part 10 is airtightly connected to the connector part 3 for insulating oil sampling provided in the connection box 2 of the inlet cable (not shown). The insulating passage portion 20 forms an insulating oil discharge path in communication with the inside of the insulating oil sampling device 1 for an inflow cable according to the present invention. Referring to FIG. 2, the insulating passage portion 20 according to an embodiment of the present invention includes an inlet passage portion 21, an discharge passage portion 22, and an intermediate passage portion 23.

The inflow passage portion 21 is formed inside the connector connection portion 10. The discharge passage portion 22 is formed inside the valve portion 30. The intermediate passage portion 23 is formed inside the valve insulating portion 40 to communicate with the inflow passage portion 21 and the discharge passage portion 22. That is, the insulating passage portion 20 has a structure in which the inlet passage portion 21, the middle passage portion 23, and the discharge passage portion 22 extend continuously from the upstream side to the downstream side.

In a state where the connector connection portion 10 is connected to the connector portion 3, the insulating passage portion 20 communicates with the connector portion 3. The insulating oil flowing from the connector portion 3 to the connector connection portion 10 continues to pass through the inside of the insulating passage portion 20 and is discharged through the end of the insulating passage portion 20. The valve unit 30 has the structure of a valve that opens and closes the flow path, and opens and closes the insulated flow path part 20. When the valve portion 30 is opened, the insulating passage portion 20 is opened and the insulating oil is discharged to the outside of the connection box 2 through the end of the insulating passage portion 20. When the valve part 30 is closed, the insulating passage part 20 is closed and the discharge of insulating oil is stopped.

The valve insulator 40 is a device part that insulates the valve part 30 and the connector connection part 10 so that the operation of the valve part 30 can be safely performed in an insulated state, and includes an insulator, and the connector connection part 10 ) and the valve unit 30. Accordingly, the operator can safely operate the valve unit 30 in a state clearly insulated from the connection box (2), and overvoltage due to surge inflow, ground fault current, etc. on the connection box (2) side during the insulating oil collection operation. Safety can be ensured even in cases where this occurs.

The insulating cover part 50 includes an insulating material and covers the connector connection part 10 and the valve insulating part 40. The insulating cover part 50 is a valve part that requires operator manipulation when the connector connection part 10, the valve part 30, and the valve insulating part 40 are assembled together or are coupled to the connector part 3. By covering a part of (30), more specifically, the remaining part excluding the opening/closing control part 32 and the cap part 34, the insulation stability of the valve part 30 together with the valve insulating part 40 is secured in multiple ways. do.

Referring to Figures 3 and 4, the connector connection part 10 according to an embodiment of the present invention includes a connection body part 11, a connector fastening part 12, and a first insulator connection part 16.

The connection body part 11 is a device part that forms the basic frame of the connector connection part 10, and the inlet flow path part 21 of the insulating flow path part 20 is formed therein. The connection main body 11 according to an embodiment of the present invention is connected together with other equipment such as cables (2), taking into account space utilization for sharing limited space around and smooth discharge of insulating oil. It is arranged to extend in a direction parallel to the outer surface of the junction box (2), rather than in a direction protruding from the outer surface of the junction box (2).

The connector fastening portion 12 is a device portion fastened to the connector portion 3 and is formed at one end of the connection body portion 11. The connector fastening portion 12 can be firmly coupled by a bolt and nut fastening structure, and watertightness can be more stably secured by connecting the ends having a tapered shape. Referring to Figure 4, the connector fastening portion 12 according to an embodiment of the present invention includes a nut support portion 13, a connection nut portion 14, and a connection stopper portion 15.

The nut support portion 13 is formed to protrude from the connection body 11 toward the connector portion 3 at a position corresponding to the end of the inflow passage portion 21 inside the connection body 11. Inside the nut support portion 13, an inflow passage portion 21 is formed to communicate with the inflow passage portion 21 inside the connection body portion 11.

The end of the nut support portion 13 is in contact with the connector portion 3, and the outer diameter portion has a tapered shape. Due to this shape, the end of the nut support portion 13 has a sharp shape whose width gradually decreases toward the distal end, and is in close contact and pressure contact with the connector portion 3 in a state in which a portion is retracted into the interior of the connector portion 3. do.

The connection nut portion 14 has a female thread portion on the inner diameter portion and is rotatably coupled around the nut support portion 13, and is screwed to the male thread portion formed on the outer diameter portion of the connector portion 3. The connection stopper portion 15 is formed to protrude in the radial direction on the nut support portion 13. The connection nut portion 14 inserted into the nut support portion 13 is caught by the connection stopper portion 15 and is prevented from being separated from the nut support portion 13.

The connection nut portion 14 is screwed to the connector portion 3 while being in contact with the connection stopper portion 15. At this time, the connection stopper portion 15 supports the fastening force between the connection nut portion 14 and the connector portion 3. The force acting on the connection nut portion 14 toward the connector portion 3 is transmitted to the connection stopper portion 15, and the connection stopper portion 15 supports it.

The first insulator connection portion 16 is a device portion coupled to the valve insulator portion 40 and is formed at the other end of the connection body portion 11. The first insulator connection portion 16 is formed in a flange shape at the end of the connection body portion 11 and contacts one side of the insulating pipe portion 41 of the valve insulating portion 40. More specifically, the first insulator connection portion 16 has a width corresponding to the insulating pipe portion 41. A plurality of holes are formed on the first insulator connecting portion 16 through which the first fastening member 42 of the valve insulating portion 40 can penetrate.

Figure 5 is a partial cross-sectional view showing the valve portion of the insulating oil sampling device for inflow cables according to an embodiment of the present invention.

Referring to Figures 3 and 5, the valve part 30 according to an embodiment of the present invention includes a valve body part 31, an opening/closing control part 32, a second insulator connection part 33, and a cap part 34. Includes.

The valve body portion 31 is a device portion that forms the basic frame of the valve portion 30, and the discharge passage portion 22 of the insulating passage portion 20 is formed therein. The opening/closing control unit 32 has the structure of a valve that opens and closes the discharge passage unit 22, and is coupled to the valve body unit 31. In Figure 5, a structure using a bellows valve as the valve body portion 31 is disclosed, but this is intended to disclose a suitable example and is not intended to limit the embodiment of the present invention to this. The opening and closing control unit 32 is not limited to a specific structure and shape, including known valves, as long as it can open and close the discharge passage unit 22.

The second insulator connection portion 33 is a device portion coupled to the valve insulator portion 40 and is formed at one end of the valve body portion 31. The second insulator connecting portion 33 is formed in a flange shape at the end of the valve body portion 31 and contacts the other side of the insulating pipe portion 41 of the valve insulating portion 40. More specifically, the second insulator connection portion 33 has a width corresponding to the insulating pipe portion 41.

A plurality of holes through which the second fastening member 43 can pass are formed on the second insulator connecting portion 33. At this time, when forming the hole on the second insulator connecting portion 33, the first fastening member 42 and the second fastening member 43 are disposed at positions spaced apart from each other in the circumferential and radial directions, so that the first insulator It is preferable to form the hole at a position deviating from the hole formed on the connection portion 16. Accordingly, the length of the insulating pipe portion 41 can be expanded and expanded in more diverse ways, and the insulating pipe portion 41 is formed by forming a female thread groove for fastening the first fastening member 42 and the second fastening member 43. The decrease in rigidity can be reduced.

The valve body part 31 has a structure that allows the opening and closing control part 32 to be separated from the second insulator connection part 33 to facilitate inspection, management, and replacement of the opening and closing control part 32 having the structure of a valve. have Referring to Figure 5, the valve body portion 31 according to an embodiment of the present invention includes a first body portion 311, a second body portion 312, and a valve management connection portion 313.

The first body portion 311 is one side disposed on the downstream side of the valve body portion 31 and is connected to the opening/closing control portion 32. The second body portion 312 is the other side disposed on the upstream side of the valve body portion 31 and is connected to the second insulator connection portion 33. A discharge passage portion 22 is continuously formed inside the first body portion 311 and the second body portion 312.

The valve management connection portion 313 connects the first body portion 311 and the second body portion 312 to each other in a separable manner. Referring to Figure 5, the valve management connection part 313 according to an embodiment of the present invention includes a first tapered part 314, a second tapered part 315, a management bolt part 316, and a management nut part 317. , including a management stopper unit 318.

The first tapered portion 314 is formed to be tapered at the end of the first body portion 311, and more specifically, at the inner diameter portion. The second tapered portion 315 is formed to be tapered at the end of the second body portion 312, more specifically, at the outer diameter portion, and is formed to be tapered when the management bolt portion 316 and the management nut portion 317 are fastened. It is in contact with wealth (314). The second tapered portion 315 has a sharp shape whose width gradually decreases toward the distal end, and is in tight and pressure contact with the first tapered portion 314 while being inserted into the first tapered portion 314.

The management bolt portion 316 is formed as a male thread portion on the outer diameter of the first body portion 311. The management nut portion 317 is a device portion screwed to the management bolt portion 316 and is rotatably coupled to the circumference of the second body portion 312. The management nut portion 317 is formed in the structure of a female thread portion on the inner diameter portion of the second body portion 312 and is screwed to the management bolt portion 316.

The management stopper part 318 is a device part for restraining the separation of the management nut part 317, and is formed to protrude in the radial direction on the second body part 312. The management nut part 317 inserted into the second main body 312 is caught by the management stopper part 318 and is prevented from being separated from the second main body 312.

The management nut portion 317 is screwed to the management bolt portion 316 while being in contact with the management stopper portion 318. At this time, the management stopper portion 318 supports the fastening force between the management nut portion 317 and the management bolt portion 316. The force acting on the management nut part 317 toward the first body part 311 and the management bolt part 316 is transmitted to the management stopper part 318, and the management stopper part 318 supports it.

The first main body 311 and the second main body 312 can be firmly coupled by a bolt and nut fastening structure between the management bolt part 316 and the management nut part 317, and the screw fastening can be released when necessary. By doing so, they can be separated from each other. In addition, the first body portion 311 and the second body portion 312 have tapered ends that are connected to each other, more specifically, the first tapered portion 314 and the second tapered portion 315 to ensure watertightness. It can be secured stably.

The cap portion 34 is a device portion corresponding to a stopper for closing and opening the discharge end of the discharge passage portion 22, and is detachably coupled to the other end of the valve body portion 31. Separate the cap part 34 from the valve body part 31, secure the open state of the insulating flow part 20, and collect insulating oil while controlling the opening and closing of the insulating flow part 20 using the opening and closing control part 32. work can be performed.

In addition, after completing the insulating oil sampling operation, the cap part 34 is secondarily coupled to the valve body part 31 while the insulating passage part 20 is primarily closed using the opening/closing control part 32. By blocking the discharge passage portion 22 in multiple stages, leakage of insulating oil can be stably prevented. Referring to Figure 5, the cap portion 34 according to an embodiment of the present invention includes a stopper portion 35 and a stopper fixing portion 36.

The stopper portion 35 has a wider width than the discharge end of the insulating passage portion 20, contacts the other end of the valve body portion 31, and closes the insulating passage portion 20. The end of the stopper 35 has a tapered outer diameter. Due to this shape, the end of the stopper portion 35 has a sharp shape whose width gradually decreases toward the distal end, and is in airtight contact with the valve body portion 31 with a portion of the cap portion retracted into the interior of the discharge passage portion 22. , are pressure-welded.

The stopper fixing part 36 attaches the stopper part 35 to the valve body part 31 in a detachable manner. The stopper fixing part 36 according to an embodiment of the present invention has the same structure as the connection nut part 14 and the management nut part 317, and is screwed to the valve body part 31. At this time, protrusions corresponding to the connection stopper part 15 and the management stopper part 318 are formed on the stopper part 35. Due to the structure of the stopper portion 35 and the stopper fixing portion 36, the stopper portion 35 can be fastened to the discharge end of the valve body portion 31 and at the same time airtightly pressure-welded.

Figure 6 is a partial cross-sectional view showing the valve insulation part of the insulating oil sampling device for the inflow cable according to an embodiment of the present invention.

Referring to Figure 6, the valve insulation portion 40 according to an embodiment of the present invention includes an insulating pipe portion 41, a first fastening member 42, a second fastening member 43, and a first sealing member 44. , and includes a second sealing member (45).

The insulating pipe portion 41 is made of an insulator such as epoxy resin and is disposed between the connector connection portion 10 and the valve portion 30. The insulating pipe portion 41 has a cylindrical shape with a set thickness in the radial direction. A fastening groove into which the first fastening member 42 can be fastened is formed at one end of the insulating pipe portion 41, and a fastening groove into which the second fastening member 42 can be fastened is formed at the other end. An intermediate passage portion 23 is formed inside the inner diameter of the insulating pipe portion 41.

The first fastening member 42 connects one end of the insulating pipe portion 41 with the connector connection portion 10. A bolt member can be applied as the first fastening member 42. The first fastening member 42 penetrates the first insulator connecting portion 16 having a flange shape and is fastened to the insulating pipe portion 41, thereby connecting the connector connecting portion 10 and the valve insulating portion 40 to each other.

The second fastening member 43 connects the other end of the insulating pipe portion 41 with the valve portion 30. A bolt member can be used as the second fastening member 43. The second fastening member 43 penetrates the second insulator connection part 33 having a flange shape and is fastened to the insulating pipe part 42, thereby connecting the valve part 30 and the valve insulating part 40 to each other.

The first sealing member 44 is a device part that mutually seals the connector connection part 10 and the insulating pipe part 41, and is made of a soft elastic member such as rubber, and is a device for sealing the connector connection part 10 and the insulating pipe part 41. placed in between. A circular groove into which the first sealing member 44 can be inserted is formed on at least one side of the first insulator connection portion 16 and the insulating pipe portion 41. The first sealing member 44 has a ring shape with a set distance from the intermediate flow path portion 23 and is inserted into the circular groove.

The second sealing member 45 is a device part that mutually seals the valve part 30 and the insulating pipe part 41, and is made of a soft elastic member such as rubber, and is a device part that seals the valve part 30 and the insulating pipe part 41. placed in between. A circular groove into which the second sealing member 45 can be inserted is formed on at least one side of the second insulator connection portion 33 and the insulating pipe portion 41. The second sealing member 45 has a ring shape with a set distance from the intermediate flow passage portion 23 and is inserted into the circular groove.

Referring to Figures 1 and 2, the insulating cover part 50 according to an embodiment of the present invention includes a first cover part 51 and a second cover part 52.

The first cover part 51 includes an insulating material and covers the valve insulating part 40. A heat shrinkable tube can be used as the first cover part 51. In a state in which the connector connection part 10 and the valve part 30 are coupled to both ends of the valve insulating part 40, a first insulating part 16 and a first insulating part 16 are formed to surround the valve insulating part 40. By exposing the first cover part 51 to a high-temperature atmosphere while inserting a heat shrink tube to surround the fastening member 42, the insulating pipe part 41, the second fastening member 43, and the second insulator connection part 33. The valve insulation portion 40 can be airtightly covered.

The second cover part 52 includes an insulating material and continuously covers the connector part 3 and the connector connection part 10. The second cover part 52 is installed to cover the connector part 3 and the connector connection part 10 in a state in which the connector connection part 10 is assembled and fastened to the connector part 3. The second cover portion 52 can be formed by sequentially multiple combining a self-fusing tape, a high-elasticity compression tape, and a PVC tape. Referring to Figure 2, the second cover part 52 according to an embodiment of the present invention includes a main cover part 53 and a laminated cover part 54.

The main cover part 53 is a part of the second cover part 52 that covers the connector part 3 and the connector connection part 10. The laminated cover part 54 is a part that covers the first cover part 51 of the second cover part 52, and is formed continuously with the main cover part 53. Using the laminated cover part 54, it is possible to clearly prevent a gap from occurring between the first cover part 51 and the second cover part 53, and the first cover part 51 and the second cover part 53 (53) can be continuous together to cover the insulating oil sampling device (1) for inflow cable according to the present invention.

The first cover part 51 and the second cover part 53 are made of an insulating material, and include the opening/closing control part 31 and the cap part 34 of the insulating oil sampling device 1 for an inflow cable according to the present invention. The remaining part except for the opening/closing control part 31 and the cap part 34 among the connector part 3, the connector connection part 10, and the valve part 30, and the valve insulating part 40 are continuous. By covering it, the present invention is safely insulated from external overvoltage factors.

When installing the insulating oil sampling device (1) for an inflow cable according to the present invention in the connection box (2), that is, when installing it for the first time, the connector provided in the connection box (2) is checked whether the line is interrupted. After removing the cover of the part (3), the adjustment nut and adjustment ball blocking the connector part (3) are removed, and the insulating oil sampling device (1) for the inflow cable according to the present invention is connected to the connector part (3). . Next, the opening/closing control unit 32 is opened to overflow the insulating oil coming from the connection box 2, thereby removing the remaining air inside the insulating passage unit 20. Next, installation can be completed by combining the second cover part 52, sealing, and finishing.

When collecting insulating oil using the insulating oil sampling device (1) for inflow cable according to the present invention, prepare a sample can for insulating oil sampling and storage, and open and close the control unit (32) while omitting the process of turning off the line. After the opening operation, the insulating oil coming out through the discharge end of the valve unit 30 is collected in a sample can. After completing the insulating oil sampling, the insulating oil sampling work can be completed simply and easily by closing the opening/closing control unit 32.

According to the insulating oil sampling device 1 for an inflow cable according to the present invention having the above-mentioned configuration, in a state in which the insulation state is stably secured by the valve insulating part 40, the process of shutting down the line is omitted, and the valve is operated. The insulating oil for the inflow cable can be quickly and easily collected with a simple operation of opening and closing the part 30.

According to the present invention, since a line cease-fire is not involved during the insulating oil extraction work, there are no restrictions on work time depending on the cease-fire and pressurization (end of cease-fire) time, and auxiliary work such as grounding work and confirmation of the line and site are omitted, thereby reducing the work time. can be significantly shortened, and simultaneous work on multiple lines within a manhole is possible in a live line, preventing duplication of manhole drainage and thereby shortening work time. In addition, the valve insulation unit 40 can ensure the safety of workers even in the event of abnormal voltage or moisture.

In addition, according to the present invention, the time required for insulating oil sampling work can be shortened, costs such as labor costs can be reduced, and insulating oil can be collected and analyzed throughout the plurality of junction boxes connected to the inflow cable. Accordingly, the reliability of diagnosing deterioration of insulating oil and predicting the initial stage of failure of the inflow cable can be further improved.

In addition, according to the present invention, the repeated tightening and disassembly of screws that were performed to directly open and close the connector portion (3) provided in the connection box (2) during the insulating oil sampling operation is unnecessary, resulting in frequent tightening and disassembly of screws. Damage such as wear of fasteners can be resolved. In addition, it is possible to prevent insulating oil from scattering or being lost when opening and closing the connector part (3) directly, and to prevent sudden hydraulic pressure fluctuations due to insulating oil loss, preventing equipment failure and prolonged power outages due to rapid hydraulic pressure fluctuations in the inflow cable. It can be prevented at the source.

In this way, according to the present invention, construction quality, safety management, and power system stability can be improved by eliminating the need for line outages, and the reliability of diagnosing insulation deterioration of inflow cables can be improved by expanding the insulating oil collection point, and the connector part can be improved. (3) Since fastening and disassembly work to directly open and close is unnecessary, work convenience can be increased, and the factors causing equipment failure can be eliminated.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will recognize that various modifications and other equivalent embodiments are possible therefrom. You will understand. Therefore, the true technical protection scope of the present invention should be determined by the scope of the patent claims below.

1: Insulating oil sampling device for inflow cable 2: Connection box
3: connector part 10: connector connection part
11: main body part 12: connector fastening part
13: nut support part 14: connection nut part
15: Connection stopper part 16: First insulator connection part
20: insulating passage part 21: inflow passage part
22: discharge passage part 23: middle flow passage part
30: valve part 31: valve body part
32: opening/closing control part 33: second insulator connection part
34: cap part 35: stopper part
36: Stopper fixing part 40: Valve insulation part
41: insulating pipe part 42: first fastening member
43: second fastening member 44: first sealing member
45: second sealing member 50: insulating cover part
51: first cover part 52: second cover part
53: main cover part 54: laminated cover part
311: first main body 312: second main body
313: Valve management connection part 314: First tapered part
315: Second tapered section 316: Management bolt section
317: Management nut part 318: Management stopper part

Claims (14)

A connector connection part connected to the connector part for collecting insulating oil of the inflow cable;
an insulating passage part forming a discharge path of insulating oil through the connector connection part;
A valve unit that opens and closes the insulated flow path unit; and
It includes a valve insulation portion that includes an insulator and is disposed between the connector connection portion and the valve portion,
The valve part,
A valve body portion in which the insulating passage portion is formed;
An opening/closing control unit having the structure of a valve that opens and closes the insulated flow path unit and coupled to the valve body unit; and
It includes a second insulator connection portion formed at one end of the valve body portion and coupled to the valve insulator portion,
The valve body part,
A first body part connected to the opening/closing control part;
a second body portion connected to the second insulator connection portion; and
An insulating oil sampling device for an inlet cable, comprising a valve management connection part that detachably connects the first body and the second body to each other.
According to paragraph 1,
The connector connection part,
a connection body portion in which the insulating passage portion is formed;
a connector fastening portion formed on one end of the connection body portion and fastened to the connector portion; and
An insulating oil sampling device for an inlet cable, comprising: a first insulator connection portion formed at the other end of the connection body portion and coupled to the valve insulator portion.
According to paragraph 2,
The connector fastening part,
a nut support portion protruding from the connection body portion and an end of which is in contact with the connector portion;
a connection nut portion rotatably coupled to the nut support portion and fastened to the connector portion; and
An insulating oil sampling device for an inlet cable, comprising a connection stopper portion that protrudes from the nut support portion and restrains separation of the connection nut portion.
According to paragraph 1,
The insulating passage part,
an inflow passage portion formed inside the connector connection portion;
A discharge passage portion formed inside the valve portion; and
An insulating oil sampling device for an inlet cable, comprising: an intermediate passage part formed inside the valve insulating part to communicate with the inlet flow path part and the discharge flow path part.
According to paragraph 1,
The valve part,
An insulating oil sampling device for an inflow cable, further comprising a cap portion detachably coupled to the other end of the valve body portion and closing the insulating passage portion.
delete According to paragraph 1,
The valve management connection part,
A management bolt portion formed in the first body portion;
a management nut portion rotatably coupled to the second body portion and fastened to the management bolt portion; and
An insulating oil sampling device for an inflow cable, comprising a management stopper portion that protrudes from the second body portion and restrains the management nut portion from being separated.
In clause 7,
The valve management connection part,
a first tapered portion formed to be tapered on an inner diameter portion of the first body portion; and
An insulating oil sampling device for an inflow cable comprising a second tapered portion that is formed to be tapered on an outer diameter portion of the second body portion and contacts the first tapered portion when the management bolt portion and the management nut portion are fastened.
According to clause 5,
The cap part,
A stopper portion that contacts the valve body portion and closes the insulating passage portion; and
An insulating oil sampling device for an inflow cable comprising a stopper fixing part that detachably fastens the stopper to the valve body.
According to paragraph 1,
The valve insulation part,
an insulating pipe portion including an insulator and disposed between the connector connection portion and the valve portion;
a first fastening member connecting one end of the insulating pipe portion with the connector connection portion;
a second fastening member connecting the other end of the insulating pipe portion to the valve portion;
a first sealing member disposed between the connector connection portion and the insulating pipe portion; and
A second sealing member disposed between the valve portion and the insulating pipe portion.
According to clause 10,
The insulating pipe portion has a cylindrical shape with both ends open,
The connector connection portion and the end of the valve portion in contact with the insulating pipe portion have a flange shape and are in surface contact with the insulating pipe portion, and are coupled to the insulating pipe portion by the first fastening member and the second fastening member. Insulating oil sampling device for inflow cables.
According to paragraph 1,
An insulating oil sampling device for an inlet cable, comprising an insulating material and further comprising an insulating cover part that covers the connector connection part and the valve insulating part.
According to clause 12,
The insulating cover part,
a first cover part including an insulating material and covering the valve insulating part; and
An insulating oil sampling device for an inlet cable, comprising: a second cover portion comprising an insulating material and continuously covering the connector portion and the connector connection portion.
According to clause 13,
The second cover part,
a main cover part covering the connector part and the connector connection part; and
An insulating oil sampling device for an inlet cable, comprising a laminated cover part formed continuously with the main cover part and covering the first cover part.

Images