Indirect live wire drilling tool for lead wire of gas insulated load break switch for overhead line, and operating method thereof

Abstract

The present invention relates to an indirect live wire drilling tool for a lead wire of a gas insulated load break switch for an overhead line, and an operating method thereof, the tool drilling a hole in a covering (3) of a lead wire (1) by means of the rotary force of an end mill (46) in a drill body (10) connected to an indirect live wire insulating stick, so that moisture infiltrating the lead wire (1) can be removed. Therefore, since extra pre-tasks are unnecessary, construction costs and construction time can be minimized and a construction procedure can be simplified, and, since the exposed portion of a charging unit is small when a sleeve cover is removed due to strong winds and typhoons, the probability of failure can be low in comparison with a stripping operation.

Description

Indirect live line processing gas switch rescue line drilling tool and its working method

[0001] The present invention relates to a drilling tool for a gas switch rescue line for an indirect live line and a working method thereof, and more particularly, to a drilling tool for a gas switch rescue line for an indirect live line and a working method thereof, which can remove moisture by drilling a gas switch rescue line for an indirect live line using a drilling tool according to an indirect live line method.

[0002] In general, in extreme cold weather, moisture that has penetrated into the gas switch (hereinafter referred to as the switch) freezes and expands depending on the temperature, causing cracks and damage to the bushing, which in turn causes ground faults.

[0003] That is, there was a problem in that when the compression of the relief line is poor (heterogeneous sleeve), moisture infiltrates into the gap of the relief line, and when the molding of the relief line is poor, moisture infiltrates into the inside of the bushing due to a defect in the molding part of the relief line (mold cone), and when moisture infiltrates the relief line, moisture freezes and expands inside the bushing, causing bushing damage.

[0004] In addition, as shown in Fig. 1, the path of moisture penetration into the gap of the relief line and then into the bushing is in the order of bond peeling, insulator, mold cone lifting, and moisture inflow, and the path of moisture penetration into the relief line is in the order of moisture inflow into the relief line, internal conductor, poor bonding at the mold cone boundary, and moisture inflow.

[0005] At this time, the switch case (flange) is energized due to bushing damage and insulation destruction caused by moisture freezing and expansion.

[0006] In order to prevent such failures, the compression state of the dissimilar metal sleeve of the switch and the installation of self-fusion tape were checked while the line was live, and the insulation cover was installed after removing (stripping) the insulation of the switch's rescue line to remove moisture inside the rescue line, thereby preventing damage to the switch's bushing and insulation breakdown due to moisture penetration.

[0007] In addition, when removing moisture from the rescue line of the opener, the rescue line covering was removed, and after removing moisture from the rescue line, a sleeve cover was installed.

[0008] However, direct live-line work, in which workers wear protective gear (insulating rubber gloves, etc.) and work directly on a live line, has been prohibited (abolished) for safety reasons, and indirect live-line work, which uses four types of indirect live-line insulating sticks (rotary stick, hot stick, grab stick, hand stick) and tools (scrapers), has been used as an alternative method.

[0009] Since the indirect live wire insulation sticks (rotary sticks) and tools (stripping machines) developed to date cannot strip (remove the insulation) of the switch rescue line (molded cone HDCC), preliminary work is required to make the work section diagonal.

[0010] In other words, if the work section becomes diagonal, workers can directly remove moisture by burying the rescue line, but the method and cost of the preliminary work to make the work section diagonal are unnecessarily high, and excessive construction costs are incurred to remove moisture that has penetrated into the rescue line.

[0011] The purpose of the present invention is to provide a drilling tool for a gas switchboard for indirect live wiring and a working method thereof, which can minimize construction costs and construction time and simplify construction procedures by drilling the rescue line shell through indirect live wiring work to remove moisture.

[0012] According to an embodiment of the present invention for solving the above technical problem, a drilling tool for drilling a rescue line for an indirect live line, which is connected to an indirect live line insulating stick to hold a rescue line and drills one side of a covering of the rescue line to remove moisture within a gap, comprises: a drilling body having a first rotating body therein connected to the indirect live line insulating stick to rotate; a second rotating body connected to the first rotating body to rotate simultaneously with the first rotating body and having an end mill; and a guide body connected to the drilling body to hold the rescue line so as to guide it toward the end mill.

[0013] The above-mentioned perforator body and the above-mentioned guide body are in the form of a hollow tube, and the front inner surface of the guide body is covered with the rear outer surface of the above-mentioned perforator body and fastened by a third bolt.

[0014] The outer surface of the above puncher body is characterized in that a flange portion is formed to guide the hole for fastening the third bolt to align when the end of the guide body is stopped by contact when the guide body is fitted into the puncher body.

[0015] The above first rotating body is characterized in that it is rotatably supported at the center of the inner diameter of the perforator body via a plurality of bearings.

[0016] The first rotating body is characterized in that a rotating shaft is formed at the rear to protrude toward the rear of the perforator body and is connected to the second rotating body, and a fastening surface is formed at the front to protrude toward the front of the perforator body and is connected to the indirect live wire insulating stick.

[0017] The above bearing is characterized in that the rear side edge is closely fixed by a bulkhead formed in the center of the longitudinal side of the perforator body, and the front side edge is closely fixed by a snap ring fastened to the inner surface of the perforator body.

[0018] The second rotating body is characterized in that a hollow shaft is formed in the front in which the rotating shaft is inserted and fixed by a first bolt, and a drill chuck is formed in the rear in which the end mill is inserted and fixed by a second bolt.

[0019] The above first bolt is characterized in that it is in the form of a set screw that penetrates one side of the outer surface of the hollow shaft and is fastened to the rotating shaft.

[0020] The second bolt is characterized in that it is in the form of a set screw that penetrates one side of the outer surface of the drill chuck and is fastened to the end mill.

[0021] The above guide body is characterized in that an opening is formed at the rear so that the circumference of the rescue line can enter and exit from the rear of the guide body to a certain depth.

[0022] The inside of the above opening is characterized in that a semicircular portion is formed to fit closely to the outer curvature of the above rescue line.

[0023] In addition, according to another embodiment of the present invention, a drilling tool for drilling a rescue line for an indirect live line, which is connected to an indirect live line insulating stick, holds the rescue line, and drills one side of the covering of the rescue line to remove moisture in the gap, is characterized by including: an end mill which is installed inside a drilling machine body so as to be connected to the indirect live line insulating stick and rotate; and a guide body which is connected to the drilling machine body and can hold the rescue line toward the end mill, and is made of a material having a frictional force of a certain value or higher so as to prevent the rescue line from slipping.

[0024] Meanwhile, a method for operating a drilling tool for a gas switch rescue line for an indirect live line according to an embodiment of the present invention comprises the steps of: protecting a neutral line or a low-voltage line; holding a rescue line by connecting a drilling tool to an indirect live line insulating stick and drilling the covering of the rescue line; installing an insulating cover by using the indirect live line insulating stick to surround the drilled rescue line; and taping both ends of the insulating cover by using the indirect live line insulating stick; and removing the protection of the neutral line or the low-voltage line.

[0025] The present invention relates to a drilling tool for a gas switchboard for indirect live wires and a method of drilling the drilling wire covering by the rotational force of an end mill within a drilling machine body connected to an indirect live wire insulation stick, thereby removing moisture that has penetrated into the drilling wire. Therefore, the construction cost and construction time due to the absence of other preliminary work can be minimized and the construction procedure can be simplified. In addition, when the sleeve cover is detached due to strong winds or typhoons, the exposed area of ​​the live part is small, so the probability of failure can be lowered compared to peeling work.

[0026] Figure 1 is an example of a moisture penetration and current passage of a conventional processed gas switch.

[0027] Figure 2 is an example of a combination of a gas shutoff valve extraction line perforator of the present invention.

[0028] Figure 3 is an example of a gas shutoff valve guide line of the present invention.

[0029] Figure 4 is an exploded view of a gas shutoff valve extraction line perforator of the present invention.

[0030] Figure 5 is an example of a combination of a gas shutoff valve extraction line perforator and a guide of the present invention.

[0031] Figure 6 is a cross-sectional view showing an example of a combined guide and a drilling machine for a gas shutoff valve of the present invention.

[0032] *Explanation of key symbols in the drawing*

[0033] 1: Rescue ship 3: Cover

[0034] 5: Line 7: Gap

[0035] 10: Perforator body 12: Bulkhead

[0036] 14: Flange section 20: First rotating body

[0037] 22: Rotating axis 24: Fastening surface

[0038] 30: Bearing 32: Snap ring

[0039] 40: Second rotor 42: Hollow shaft

[0040] 43: 1st bolt 44: Drill chuck

[0041] 45: Second bolt 46: End mill

[0042] 50: Guide body 52: Opening

[0043] 54: Semicircle 56: Third bolt

[0044] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings to ensure a thorough understanding of the present invention. The embodiments of the present invention may be modified in various ways, and the scope of the present invention should not be construed as being limited to the embodiments detailed below. It should be noted that in each drawing, identical components are sometimes depicted with the same reference numerals. Detailed descriptions of well-known functions and components that may unnecessarily obscure the gist of the present invention are omitted.

[0045] Referring to FIGS. 2 to 6, the indirect live line processing gas switch rescue line perforation tool according to an embodiment of the present invention is connected to an indirect live line insulating stick to hold the rescue line (1) and perforate one side of the covering (3) of the rescue line (1) to remove moisture within the gap (7), and includes a perforator body (10), a first rotating body (20), a second rotating body (40), and a guide body (50).

[0046] That is, the perforator body (10) is formed in the form of a hollow tube connected to an indirect live wire insulating stick, and a flange portion (14) is formed on the outer surface of the hollow tube shape to guide the hole for fastening the third bolt (56) to be aligned when the end of the guide body (50) is stopped by contact when the guide body (50) is fitted to the perforator body (10), and a ring-shaped partition (12) is formed in the center of the length side on the inner surface of the hollow tube shape.

[0047] The above first rotating body (20) is installed rotatably through a plurality of bearings (30) in the inner center of the puncher body (10), and a rotating shaft (22) is formed at the rear thereof, which protrudes toward the rear of the puncher body (10) and is connected to a second rotating body (40), and a hexagonal or square-shaped fastening surface (24) is formed at the front thereof, which protrudes toward the front of the puncher body (10) and is connected to an indirect live wire insulating stick.

[0048] The bearing (30) above has its rear side edge tightly fixed by a partition (12) formed in the longitudinal center of the puncher body (10), and its front side edge tightly fixed by a snap ring (32) fastened to the inner surface of the puncher body (10), thereby allowing the first rotating body (20) to smoothly rotate forward and backward around the inner center of the puncher body (10).

[0049] The second rotating body (40) is connected to surround the rotating shaft (22) formed at the rear of the first rotating body (20) and rotates simultaneously with the first rotating body (20).

[0050] That is, the second rotating body (40) is formed with a hollow shaft (42) in which the rotating shaft (22) of the first rotating body (20) is inserted in the front and fixed by a first bolt (43), and a drill chuck (44) in which an end mill (46) is inserted in the rear and fixed by a second bolt (45).

[0051] At this time, it is preferable that the first bolt (43) be configured in the form of a set screw that is fastened to the rotary shaft (22) while penetrating one side of the outer surface of the hollow shaft (42), and the second bolt (45) be configured in the form of a set screw that is fastened to the rear of the end mill (46) while penetrating one side of the outer surface of the drill chuck (44).

[0052] The above end mill (46) is adjusted in length by moving forward and backward through a space formed inside the drill chuck (44) according to the thickness of the covering (3) of the rescue line (1), and can be attached and detached by fastening the second bolt (45).

[0053] In addition, the end mill (46) has a function of perforating the covering (3) of the rescue line (1) that is in contact with the sharp blade at the end of the end mill (46) by the rotational force of the second rotating body (40) that is connected in a straight line with the first rotating body (20) and rotates simultaneously when the indirect live-line insulating stick (rotary stick) connected to the front fastening surface (24) of the first rotating body (20) is rotated in one direction.

[0054] The above guide body (50) is connected to the puncher body (10) to guide or hold the rescue line (1) toward the end mill (46), and is made of a material with a frictional force above a certain level to prevent the rescue line (1) from slipping.

[0055] That is, the above guide body (50) is in the form of a hollow tube, and the front inner surface of the hollow tube is covered with the rear outer surface of the perforator body (10) and fastened by a third bolt (56), thereby controlling the movement of the rescue line (1) during the perforation operation of the rescue line (1).

[0056] The above guide body (50) has an opening (52) formed at the rear so that the circumference of the rescue line (1) can enter and exit from the rear of the guide body (50) to a certain depth, and a semicircular portion (54) is formed on the inside of the opening (52) so as to fit closely to the outer curvature of the rescue line (1).

[0057] Meanwhile, a method for operating a drilling tool for a rescue line of an overhead gas switch according to an embodiment of the present invention comprises the steps of: protecting a neutral line or a low-voltage line; holding a rescue line (1) by connecting a drilling tool to an indirect live line insulating stick and drilling a covering (3) of the rescue line (1); installing an insulating cover by using the indirect live line insulating stick to surround the drilled rescue line (1); taping both ends of the insulating cover by using the indirect live line insulating stick; and removing the protection of the neutral line or the low-voltage line.

[0058] At this time, when perforating the covering (3) of the above rescue line (1), the assistant worker uses a grab stick to secure the rescue line (1), and the main worker attaches the perforation tool to the rotor stick and then perforates the lowest point of the covering (3) of the rescue line (1) so that moisture can be easily removed.

[0059] Here, during the perforation operation, it is desirable to adjust the blade length of the end mill (46) to 6.2 mm for 400A and 8 mm or less for 630A so as not to damage the conductor wire (5) within the rescue line (1).

[0060] When installing the above insulation cover, an assistant worker uses a D-type hook to secure the insulation cover for indirect live lines, and a main worker uses a hand stick to install the insulation cover for indirect live lines.

[0061] When taping both ends of the above insulating cover, an assistant worker uses a hand stick to hold the ends of the tape, and the main worker firmly tapes them.

[0062] In this way, the present invention is a drilling tool for a gas switchboard for indirect live wires and a working method thereof that can remove moisture that has penetrated into a live wire (1) by drilling a rescue wire covering (3) by the rotational force of an end mill (46) in a drilling machine body (10) connected to an indirect live wire insulating stick, thereby minimizing construction costs and construction time due to the absence of other preliminary work, and simplifying the construction procedure. In addition, when the sleeve cover is detached due to strong winds or typhoons, the exposed area of ​​the live part is small, so that the probability of failure can be lowered compared to peeling work.

[0063] Meanwhile, the present invention is not limited to the above-described embodiments, but can be implemented by modifying and changing the same within the scope that does not deviate from the gist of the present invention, and the technical ideas to which such modifications and changes are applied should also be considered to fall within the scope of the following patent claims.

Claims

1. A perforation tool that is connected to an indirect live wire insulation stick, holds a rescue line (1), and perforates one side of the covering (3) of the rescue line (1) to remove moisture within the gap (7). A perforator body (10) having a first rotating body (20) inside so as to be connected to the above indirect live wire insulating stick and rotated; A second rotating body (40) having an end mill (46) connected to the first rotating body (20) and rotating simultaneously with the first rotating body (20); and An indirect live wire processing gas switch rescue line perforation tool including a guide body (50) connected to the perforator body (10) and holding the rescue line (1) so as to guide it toward the end mill (46).

2. In claim 1, The above perforator body (10) and the above guide body (50) are in the form of a hollow tube, An indirect live wire processing gas switch rescue line drilling tool characterized in that the front inner surface of the guide body (50) is covered on the rear outer surface of the above drill body (10) and fastened by a third bolt (56).

3. In claim 2, An indirect live line processing gas switch rescue line drilling tool characterized in that a flange portion (14) is formed on the outer surface of the perforator body (10) so that when the guide body (50) is fitted into the perforator body (10), the end of the guide body (50) comes into contact and stops, and the hole for fastening the third bolt (56) is aligned.

4. In claim 1, An indirect live wire processing gas switch rescue line drilling tool characterized in that the first rotating body (20) is rotatably supported at the center of the inner diameter of the drill body (10) via a plurality of bearings (30).

5. In claim 4, The above first rotating body (20) is A rotation axis (22) is formed at the rear of the perforator body (10) and is connected to the second rotation body (40). An indirect live line processing gas switch rescue line perforation tool characterized in that the front of the first rotating body (20) protrudes toward the front of the perforator body (10) and a connecting surface (24) connected to the indirect live line insulating stick is formed.

6. In claim 4, The above bearing (30) is, The rear side edge is tightly fixed by a bulkhead (12) formed in the center of the length side of the perforator body (10), An indirect live wire processing gas switch rescue line perforation tool characterized in that the front side edge is tightly fixed by a snap ring (32) fastened to the inner surface of the perforator body (10).

7. In claim 4, The above second rotating body (40) is A hollow shaft (42) is formed in which the above-mentioned rotation shaft (22) is inserted in the front and fixed by the first bolt (43), An indirect live wire processing gas switch rescue line drilling tool characterized in that a drill chuck (44) is formed by inserting the end mill (46) at the rear and fixing it by a second bolt (45).

8. In claim 7, An indirect live line processing gas switch rescue line drilling tool characterized in that the first bolt (43) is in the form of a set screw that penetrates one side of the outer circumference of the hollow shaft (42) and is fastened to the rotary shaft (22).

9. In claim 7, An indirect live wire processing gas switch rescue line drilling tool characterized in that the second bolt (45) is in the form of a set screw that penetrates one side of the outer surface of the drill chuck (44) and is fastened to the end mill (46).

10. In claim 2, The above guide body (50) is An indirect live line processing gas switch rescue line perforation tool characterized in that an opening (52) is formed at the rear so that the circumference of the rescue line (1) can enter and exit from the rear of the guide body (50) to a certain depth.

11. In claim 10, An indirect live line processing gas switch rescue line perforation tool characterized in that the inside of the above opening (52) is formed with a semicircular portion (54) so ​​as to fit closely to the outer curvature of the rescue line (1).

12. A perforation tool that is connected to an indirect live wire insulation stick, holds a rescue line (1), and perforates one side of the covering (3) of the rescue line (1) to remove moisture within the gap (7). An end mill (46) installed inside the perforator body (10) so as to be connected to the above indirect live wire insulating stick and rotated; and An indirect live wire processing gas switch rescue line drilling tool characterized by including a guide body (50) which is connected to the perforator body (10) and can place the rescue line (1) toward the end mill (46), and is made of a material having a frictional force greater than a certain level to prevent the rescue line (1) from slipping.

13. A method of working with a drilling tool for a gas circuit breaker for indirect live wires, Steps to protect the neutral or low voltage line; A step of holding a rescue line (1) by connecting a perforation tool to an indirect live wire insulating stick and perforating the covering (3) of the rescue line (1); A step of installing an insulating cover to surround the perforated rescue line (1) by an indirect live wire insulating stick; and A step of taping both ends of the insulating cover with an indirect live wire insulating stick; and A method of working with a drilling tool for an indirect live line gas circuit breaker rescue line, comprising the step of removing the protection of the neutral line or low-voltage line.

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