KR101923604B1 - Improved connector for underground distribution connection system - Google Patents

Abstract

The present invention relates to a connector with an improved connection function of an underground distribution system, and more specifically, to a connector with an improved connection function of an underground distribution system for performing maintenance by rapidly comprehending whether an underground distribution line installed inside an underground pipe is abnormal, allowing the underground distribution line to be stably maintained and to be configured to be movable and forming an underground grounding wire as a compression terminal shape, thereby reducing occurrence of accidents such as an electric leakage or a short circuit.

Description

[0001] Improved connector for underground distribution connection system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a connector having improved connection capability of an underground power distribution system among distribution technology fields, and more particularly, to an operator capable of quickly grasping an underground distribution line installed in an underground pipe Of course, it is possible to maintain the ground distribution line firmly and to move to the upper side, and to improve the connection function of the improved underground distribution system so as to suppress the accident such as short circuit or short circuit by implementing the underground ground line in the form of compressed copper terminal Connector.

In general, electric power lines are installed in electric poles or buried in the ground in order to supply electric power. The ground and airborne type are much more economical than the method of buried in the ground in consideration of the workability, the construction cost and the construction period Although there is an advantage that construction can be simplified, it is disadvantageous that it is difficult to install in a place where buildings are very close to each other, such as a downtown area.

For example, in a power plant including a thermal power plant, a hydroelectric power plant, and a nuclear power plant, electricity generated at a voltage of about 20,000 V is boosted to ultra high voltage (154 KV or 345 KV) suitable for transmission, To the primary substation.

Then, the primary substation lowers the super-high voltage electric power to 22.9 KV, which is the special high voltage, and transmits or distributes electricity to the general customers along the secondary substations or distribution lines located near the large capacity customers.

At this time, the electricity distributed from the first substation or the second substation is transmitted or distributed to the reception facilities of each customer through the transmission and distribution system composed of the processing distribution line and the underground distribution line. Through the special high pressure customer, the high pressure consumer and various outdoor installation transformers, It is used for industrial and home use.

Generally, in the transmission and distribution system using the ground, the underground pipe is placed in the ground so that the gap is maintained in the up, down, left and right directions, and a cable or underground distribution line is installed to transmit electric power to the hole formed in the underground pipe. Transmits high voltage.

The above-mentioned underground pipes must be kept in a constant spacing, and it is difficult to maintain a uniform spacing of the ground.

In the underground pipe, a plurality of shelves for accommodating a plurality of wires (for example, extra high voltage cables, communication cables, etc.) are arranged at regular intervals, and underground distribution lines are mounted on the shelves, Supply.

Regarding such a power supply system, Patent No. 0881352 discloses a technique for preventing the shortening of the service life of a distribution line due to leakage of a concrete structure and an electric accident in advance, and is a technique for preventing the flow of a rotating shaft, a guide member, ≪ / RTI > is disclosed for a "distribution line forming panel of an extra high voltage underground wire"

However, such a configuration is not perfect, so that the underground pipe is twisted or flowed due to natural disasters such as earthquake or ground erosion, so that some underground wires mounted on the shelf fall down to the bottom of the underground pipe, And this causes a lot of maintenance cost and time because the ground worker can not easily grasp the problem of the underground wires of the underground pipe among the many underground pipes.

In consideration of this point, the registered patent No. 01203532 discloses a method of detecting the position of an underground pipe and the location of a broken ground wire in the event of a natural disaster, Panel, "however, in this case, when water floats on the bottom of the concrete structure due to flooding, the corresponding structure is not provided, so that the possibility that the electric current flowing through the oxidized part of the underground wire is exposed is high Therefore, there is a high risk of safety accidents caused by blackouts or electric shocks.

Korea Patent Registration No. 10-1470870 (Dec. 23, 2014) 'Connector for underground power distribution line connection'

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and it is an object of the present invention to provide a groundwater distribution system that enables a ground worker to quickly grasp an abnormality of an underground distribution line installed in an underground pipe, Improved connection function of underground distribution system improved to prevent accident such as short circuit or short circuit by realizing underground grounding line in the form of compressed copper terminal while maintaining the power distribution line firmly and moving upward. There is a main purpose in providing.

In order to achieve the above-mentioned object, the present invention provides a method of manufacturing an underground pipe (10) having a rectangular shaped bottom (10) buried in an underground and having a receiving space (11) therein, A shelf 30 which is held by the support table 21 and is mounted on the underground distribution line L and is made of synthetic resin of transparent material and is attached to the lower side of the shelf 30, A control panel 40 connected to the upper end of the supporter 21 to detect an abnormal signal sensed by the sensing panel 40 and to send information on the sensed signal to an operator on the ground, (50);
A wire binding member 32 including a top cover 33A and a bottom cover 33B opened and closed through a hinge 34 mounted on one side of the top cover 33A is mounted on the shelf 30, The cover 33A has a hemispherical cap 35a and a flange 35b extending to one side of the cap 35a while the lower cover 33B has a flat plate portion 36b having an arc groove 36a A through hole 37 is formed in the flange 35b and the flat plate portion 36b and is fastened with a bolt 38 and the lower cover 33B is fastened to the flange 35b and the flat plate portion 36b, A pair of elastic latching pieces 39 are formed at the lower end of the shelf 30 so as to be inserted and fixed in the slots 30a formed in the shelf 30. The sensing panel 40 is provided with A photo sensor S having a light emitting portion and a light receiving portion is provided at a position corresponding to the underground distribution line L, Standing and arranged to sense the presence or absence of underground distribution line (L);
The control unit 50 includes an abnormal position determining unit 52 for detecting the unique information of the underground pipe 10, the shelf 30 and the underground distribution line L according to the sensing signal received from the sensing panel 40, A control unit 51 for converting the information provided by the abnormal position check unit 52 and the additional information of the previously stored underground power distribution line L into the monitoring information that can be read by an operator on the ground, 51) for receiving the monitoring information generated by the base station and wirelessly transmitting the monitoring information generated by the base station to the ground operator (53);
The underground pipe 10 is provided with a guide rod 61 penetrating through the support plate 60, each shelf 30 and the sensing panel 40, the shelf 30 and the sensing panel 40, A pair of motors 62 wound around pulleys of these motors 62 and connected to each of the shelves 30 and the sensing panel 40 to rotate the motors 62 forward, A liquid sensing sensor 65 disposed at the bottom of the underground pipe 10, a stopper 66 for maintaining a gap between the shelves 30, A switch 67 mounted on the lower end and operated by a stopper 66, and a support block 68 installed in the lower center of the underground pipe 10, in an underground distribution system;
And a connector main body (100) for branching from the underground pipe (10) and distributing to the switchboard;
The connector main body 100 includes an adapter 200 provided in the underground distribution system DTB into which the underground distribution line L is led, a grip guide 300 disposed in contact with the adapter 200, And a grip fastener (400) for gripping and fastening the grip guide (300);
The adapter 200 is provided in the shape of a cylinder in the underground ship DTB and is formed therein with a power distributor 201 through which the underground distribution line L is passed and is exposed to the outside of the underground ship DTB A male thread is formed over the entire circumference;
The grip guide 300 is formed in a cylindrical shape having a male screw thread over the entire outer circumferential surface thereof and has a distribution line through hole 301 communicating with the distribution player's tool 201, The grip inserting guide portion 310 is formed inside the distribution line through hole 301 so that the inner diameter of the distribution line through hole 301 gradually decreases toward the end portion contacting the adapter 200;
The grip fastener 400 is provided in a cylindrical shape with a guide inserting hole 410 having a female screw thread formed to surround the adapter 200 and the grip guide 300 so as to fasten the adapter 200, The grip guide 300 is horizontally disposed along the longitudinal direction inside the guide inserting hole 410 before being fastened to the grip guide 300 and the guide inserting hole 410 is formed in the guide inserting hole 410, A distribution line grip portion 420 for forming a distribution line insertion portion 401 so as to be deformed in a collapsed state by being in contact with the grip insertion guide portion 310 as being gradually fastened to the inside of the grip insertion portion 310;
Further comprising an auxiliary fixing unit (1300) for connector connection to temporarily fix the underground distribution line (L) when connecting the underground distribution line (L) through the connector main body (100), wherein the auxiliary fixing unit 1300 includes a fixed body 1310 and a tightening body 1320 formed in a shape of ∩ and the fixed body 1310 and the tightening body 1320 are stitched to each other, And a part of the power distribution line insertion hole 1311 is cut to form an opening 1312. A center of the bottom of the fixed body 1310 is inserted into the moving rod 23 The fixing body 1320 is fixed to both sides of the fixed body 1310 in a direction orthogonal to the power distribution line insertion hole 1311 and has an assembly groove 1315 A body bolt hole 1314 is formed in the center of the upper surface of the fixed body 1310, And a tightening body bolt hole 1321 is formed on the upper surface of the tightening body 1320 at a position corresponding to the body bolt hole 1314. The tightening body bolt hole 1321 and the body bolt hole 1314 The fastening bolts 1322 are fastened so that the lower ends of the fastening bolts 1322 press the ground distribution line L while fastening the fastening body 1320 and the fastening body 1310 together;
An extended horizontal piece 1330 having a predetermined length is further formed on one side of the fixed body 1310 and an extended vertical piece 1340 extending vertically is formed at an end of the extended horizontal piece 1330, A fixing hole 1350 is formed in the extended vertical piece 1340 so that the auxiliary fixing unit 1300 for connector connection can be temporarily fixed to one side of the underground ship DTB;
The tightening body bolt hole 1321 is formed to be larger than the body bolt hole 1314 formed in the fixed body 1310 and the fastening bolt 1322 is fastened to the body bolt hole 1314. The fastening body bolt hole 1321 is formed in the body bolt hole 1314, Further comprising a guide bushing (2100) which is inserted and fixed in the guide bushing (2100), wherein the fastening bolt (1322) is designed to move within the guide bushing (2100);
One end of the tension retaining spring 2200 is seated on the stepped surface of the guide bush 2100 and the other end of the tension retaining spring 2200 is fixed to the bolt head 2010 of the fastening bolt 1322 );
The guide bush 2100 is formed on the outer circumferential surface of the guide bush 2100 so as to be able to move along the guide bush 2100. A grip piece 2400 of a flat shape is fixed to the upper peripheral surface of the flow bushing 2300, ;
The gripping piece 2400 is constructed so as to be able to be raised and lowered around the hinge 2500. When the gripping piece 2400 is erected, the gripping piece 2400 is shaped to fit the bolt head 2010;
A grounding angle 500 having a plurality of bolt holes 510 is bolted to the underground ship DTB through a bolt hole 510 for grounding the underground distribution line L, A plurality of grounding angles 500 are formed at regular intervals along the longitudinal direction of the grounding angles 500. The grounding angles 500 have a cross-sectional shape of 'a', and one of the bolt holes 510 has a grounding compressed copper terminal And the other end of the connecting ground wire 530 is connected to the grounding copper terminal 520 by a copper wire 540 in a ' A ground wire 550 is connected to the other end of the copper socket 540;
A tip portion 3000 is detachably assembled to the lower end of the fastening bolt 1322. The tip portion 3000 has an inverted trapezoidal shape and a rod mounting groove 3100 having an open upper portion is formed at the center, A first ball bearing 3200 is disposed on the bottom surface of the rod mounting groove 3100. A slip disk 3300 is disposed in contact with the upper portion of the first ball bearing 3200, The protrusion 3400 protrudes vertically and integrally with the second protrusion 3400. The protrusion 3400 is disposed opposite to the first ball bearing 3200 with respect to the slip disc 3300 while the second ball bearing 3500 is inserted into the protrusion 3400, The fixing piece 3600 is seated and fixed to the tip part 3000 so that the ball bearings including the slip disk 3300 are not separated and separated. The coupling protrusion 3400 penetrates the center of the fixing piece 3600, The exposed and exposed end is recessed at the lower end of the fastening bolt 1322 And is fixed by a fixing pin 4100. The fixing pin 4100 is assembled such that it is completely embedded in the pin hole 4200 penetrating the coupling portion 4000 in the radial direction And the cushioning member 3700 is press-fitted into the lower end surface of the tip portion 3000 so as to be in direct contact with the power distribution line L. [

According to the present invention, an operator on the ground can quickly grasp the abnormality of an underground distribution line installed in an underground pipe to perform maintenance, and the underground distribution line can be firmly maintained and movable upward, By implementing the underground grounding wire in terminal form, it is possible to obtain the effect of suppressing the occurrence of an accident such as short circuit or short circuit.

1 is a sectional view showing the internal structure of an underground tube to which the present invention is applied.
2 is a partial perspective view showing the configuration of the shelf and the sensing panel of FIG.
3 is a cross-sectional view of the main part in a state where the shelf and the sensing panel of Fig.
4 is a block diagram for explaining the relationship between the sensing panel and the control unit of Fig.
Fig. 5 is a perspective view of the coupled state of the wire binding member. Fig.
6A and 6B are sectional views of the wire binding member in a state of separation and engagement.
7 is a cross-sectional view for explaining a state in which underground distribution lines are bound;
8 is a front view showing a state in which a main structure in an underground pipe is added.
9 is a front view showing the operation state of Fig.
Figure 10 is an exemplary cross-sectional view of a connector for use in a ground distribution system in accordance with the present invention.
11 is a view illustrating an example of a ground structure applied to a ground distribution system according to the present invention.
12 is an exemplary view of an auxiliary fixing unit for connector connection constituting a ground distribution system according to the present invention.
13 is an exemplary view of a fastening bolt of an auxiliary fixing unit for connector connection according to the present invention.
14 is an exemplary view showing a bottom structure of an improved fastening bolt according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The present invention uses the basic structure of the registered patent No. 1470870 as it is. Therefore, the features of the device configuration described below are those disclosed in the Japanese Patent Registration No. 1470870. However, the present invention further includes an improvement of some of the configurations disclosed in Japanese Patent No. 1470870. [

Therefore, each known component, feature and operation relationship will be referred to by the contents of the above-mentioned Japanese Patent No. 1470870, and the configuration related to the main features of the present invention will be specifically described at the rear end.

As shown in Figs. 1 to 4, the present invention is applied to an underground distribution system.

This underground distribution system includes an underground pipe (10), which is formed in the form of a rectangular box having an internal space for an operator to enter and maintain.

A base 20 having a predetermined width and height is provided on the bottom surface of the receiving space 11 for receiving the underground distribution line L of the underground pipe 10, And a control unit 50 in the form of a box is provided on one side of the upper end of the support 21.

At this time, it is preferable that the control unit 50 and the support base 21 are connected to each other.

The support base 21 is provided with shelves 30 (indicated by R1, R2, and R3 in FIG. 4) having a predetermined interval and a width, and a plurality of underground distribution lines L, L2 .... L8 are arranged at regular intervals.

These ground distribution lines L are mounted on the seating grooves HOM formed in the longitudinal direction on the upper surface of each shelf 30.

In addition, the underground distribution line L may be arranged so that the flow thereof is interrupted when the underground distribution line L is mounted on the shelf 30.

Particularly, the seating groove HOM formed on the shelf 30 is formed to be deeper than the radius R (see Fig. 1) of the underground distribution line L so that 1/2 or more of the outer peripheral surface of the ground distribution line L is inserted into the seating groove HOM So that the operator can apply a constant force to the underground distribution line L to fix it in a forced fit manner.

A sensing panel 40 is mounted on the lower side of each shelf 30. A seating groove HOM formed in the shelf 30 in the longitudinal direction is formed on a surface of the sensing panel 40 which contacts the shelf 30, A plurality of sensors are disposed at corresponding positions.

In this case, the sensor is preferably a photosensor (S: S1, S2, ..., S8), and the photosensor S has a general structure in which a light emitting portion and a light receiving portion are provided together. It is preferable that eight are provided.

Therefore, the optical signal output from the light emitting portion of the photosensor S is reflected on the surface of the object or underground distribution line L, and is received by the light receiving portion. That is, it is possible to detect a case where the light receiving unit of the photosensor S can not receive the optical signal outputted by the light emitting unit.

Also, the photosensor S preferably emits and receives an optical signal of any one of the colors selected from among the representative seven colors of infrared, ultraviolet, or visible light.

Therefore, it is preferable that the shelf 30 is formed of a transparent synthetic resin, or at least only the portion where the photosensor S is disposed is made of a transparent material. Alternatively, when the shelf 30 is formed of a metal material, the corresponding position of the photosensor S described above may be formed as an open hole.

The control unit 50 is fixed to the upper portion of the underground pipe 10, which is the highest part of the underground pipe 10, in order to preempt the safest position when the inside of the underground pipe 10 is submerged.

The control unit 50 is electrically connected to the sensing panel 40 provided in correspondence with each shelf 30 and is connected to the underground pipe 10, the shelf 30, It is possible to read out information on the presence or absence of the underground distribution line L and wirelessly transmit the information on the ground to the worker.

Referring to Fig. 3, the support 21 has a hollow portion PAS in the form of a pipe.

The electrical lines of the sensing panel 40 fixed to the support 21 are connected to the control unit 50 through the hollow portion PAS of the support 21. This eliminates the complexity due to separate external wiring and prevents malfunction of the control unit due to flooding.

Accordingly, when a specific ground distribution line L deviates from its position due to the occurrence of a natural disaster such as earthquake or ground erosion and the position of the shelf 30 is shifted, the photosensor S disposed on the lower side thereof The control unit 50 performs the sensing operation and provides the control unit 50 with the information on the ground distribution line L to be transmitted to the ground operator.

4 is a block diagram showing the relationship between the sensing panel 40 and the control unit 50 shown in FIG. 1. Referring to FIG. 4, the control unit 50 includes a control unit 51 and an abnormal position determination unit 52, And a radio transmission unit 53. [

At this time, the abnormal position confirming unit 52 receives the detection signal of the corresponding underground power distribution line L where the abnormality occurs among the plurality of photosensors S arranged on the sensing panel 40, And the information of the corresponding underground pipe 10 to the control unit 51.

For example, when the underground distribution line L is detached from the seating groove HOM of the shelf 30, the photosensor S of the sensing panel 40 senses it and provides it to the abnormal position determination unit 52 do. The detection information may be a concept including positional information of the unit underground distribution line L and position information of the shelf 30 and specific information of the underground pipe 10.

Therefore, the abnormal position determination unit 52 detects the detection signal and provides the control unit 51 with information of the underground pipe 10, information of the shelf 30, and information of the underground distribution line L.

The control unit 51 transmits the abnormal information about the underground distribution line L provided by the abnormal position determination unit 52 by using the wireless transmission unit 53. [

The control unit 51 reads the sensing signal for the ground distribution line L provided by the abnormal position determination unit 52 and determines the position of the underground distribution line L and the corresponding position of the shelf 30, Converts the information of the specific underground pipe (10) into a signal that can be read by the operator, and controls the wireless transmission unit (53) to transmit the signal.

More preferably, the above-described control unit 51 may be a concept including a memory. Accordingly, by providing the operator with the base storage information in which various additional information such as the role and function of the underground distribution line L are stored, information on the underground distribution line L in which the abnormality is detected can also be provided.

For example, when the sixth underground distribution line L6 of the second shelf R2 of FIG. 1 is detached from the shelf, the corresponding photosensor S6 of the detection panel 40 installed below the second underground distribution line L6 senses the departure of the underground distribution line L6.

In this case, the photosensor S of the sensing panel 40 may include a light emitting unit and a light receiving unit. When the underground power distribution line L is placed on the transparent shelf 30, L and received by the light receiving portion, it is detected that the underground distribution line L is not separated from the corresponding seating groove 30. [

However, when the underground distribution line L is deviated from the corresponding seating groove HOM, the light receiving unit which is irradiated by the light emitting unit and received the light source reflected by the underground distribution line L is reflected by the deviation of the underground distribution line L It does not receive the light source, and provides such detection information to the abnormal position determination unit 52 of the control unit 50. [

Therefore, the abnormal position confirming unit 52 confirms the position information of the sensed photosensor S and provides the information to the controller 51.

Then, the control unit 51 transmits the information (for example, information indicating that an abnormality has occurred in the L6 underground distribution line of the R2 shelf of the Nth underground pipe and the underground distribution line is an extra-high voltage wire provided to the area) ) To the ground.

Accordingly, an operator working on the ground immediately monitors such monitoring information to detect the position of the underground pipe 10 and the shelf R2 in which the underground distribution line (L) 6 in the underground pipe (10) It can instantly recognize the type of distribution line (extra-high voltage line to the area), which can shorten maintenance time and reduce costs.

In addition to this, it is possible to secure the underground power distribution line L more securely and to protect it from external impacts, as well as to detect instantaneously short-circuit or short-circuit in case of water in the underground pipe 10, 5 to 7 in order to prevent the occurrence of an accident.

5 to 7, the wire binding member 32 includes an upper cover 33A and a lower cover 33B which is opened and closed through a hinge 34 mounted on one side of the upper cover 33A .

At this time, the upper cover 33A has a semispherical cap 35a and a flange 35b extending to one side of the cap 35a.

The lower cover 33B includes an arcuate groove 36a opposed to the hemispherical cap 35a, a flat plate portion 36b extending to one side of the arcuate groove 36a, And a support plate 36c extending downward to the other side of the support plate 36c.

In addition, a pair of elastic latching pieces 39 are formed at the lower end of the lower cover 33B, and the elastic latching pieces 39 are inserted into the slots 30a formed in the shelf 30 and fixed.

In particular, in the case of the resilient latching piece 39, although the protrusion is formed at the end of a plate-like shape in the figure, it is needless to say that the elastic latching piece 39 may be separated into two or more pieces.

Thus, when the elastic catching piece 39 of the wire binding member 32 is inserted into the slot 30a formed in the shelf 30, the wire binding member 32 is mounted and the support plate 36c Pushes the upper end portion of the shelf 30 in a resilient manner and holds the supporting force.

A through hole 37 may be formed in the flange 35b of the upper cover 33A and the flat plate 36b of the lower cover 33B so as to be fastened together using bolts 38. [ Therefore, the underground distribution line L is held in the arc groove 36a of the lower cover 33B while the bolt 38 on the side of the upper cover 33A is separated, the upper cover 33A is closed, By fastening the bolts 38, the underground distribution line L can be fixed firmly.

The number of the through holes 37 and the number of the bolts 38 is not limited to one but may be two or more. For example, when the bolts 38 are formed of double or triple threads, Can be performed more quickly.

The operation of the underground distribution system according to the present invention will be described with reference to FIGS. 8 to 9. FIG.

As shown in the drawing, the present invention is basically constructed with a base 20, a shelf 30, a sensing panel 40, and a control unit 50 installed on the inner bottom of the underground pipe 10 have.

A guide plate 60 disposed between the support plate 60 and the base 20 and extending through the shelves 30 and the sensing panel 40, A pair of motors 62 for moving the shelf 30 and the sensing panel 40 upward and downward at the same time and a plurality of motors 62 wound around the pulleys of the motors 62, A wire 63 mounted on the sensing panel 40, an operation panel 64 for controlling the forward and reverse rotation of the motor 62 and a liquid sensing sensor 65 ).

A stopper 66 for holding the interval between the shelves 30 and a switch 67 mounted on the lower end of the receiving plate 60 and operated by a stopper 66 are provided at both ends of the shelf 30, And a support block 68 installed at the lower center of the underground pipe 10.

At this time, the central portions of the shelves 30 and the sensing panel 40 are arranged to face each other through the supporter 21 and can be raised and lowered along the supporter 21, And the detection panel 40 can be moved up and down in a stepwise manner.

The guide rods 61 are interposed between the shelf 30 and the sensing panel 40 so as to suppress the flow of the shelf 30 and the sensing panel 40, A motor 63 is provided at the upper end of both sides and rotated in forward and reverse directions in response to a signal from the operation panel 64. A wire 63 is coupled to a pulley mounted on the shaft of the motor 62, .

Particularly, the wire 63 is fixed to the shelf 30 disposed at the lower end of the shelf 30 through the respective shelves 30. A stopper 66 is installed at both ends of the shelf 30, The stopper 66 of the motor 60 can stop the driving of the motor 62 by operating the switch 67 mounted on the lower side of the support plate 60. [

A support block 68 is installed at the center of the bottom of the underground pipe 10 to support the shelf 30 and the sensing panel 40. Both sides of the support block 68 detect whether the water is submerged A liquid detection sensor 65 is embedded.

According to the present invention, the underground distribution line L can be disposed on the multi-stage shelf 30 installed in the underground pipe 10 as before, and when the water flows into the bottom of the underground pipe 10, It is possible to prevent the occurrence of an electric shock accident by lifting the door 30 in a stepwise manner.

That is, water is generated at the bottom of the underground pipe 10, and the liquid sensor 65 senses this, and the motor 62 is activated by a signal from the operation panel 64, The wire 63 is lifted up through the pulley mounted on the shaft and the shelf 30 and the sensing panel 40 bound to the wire 63 are moved upward.

The stoppers 66 provided on both sides of the shelf 30 may be spaced apart from the shelves 30 and the stoppers 66 provided on the uppermost shelf 30 may be spaced apart from the shelf 30, It is possible to stop the operation of the motor 62 by touching the switch 67 provided on the lower side of the motor.

Accordingly, the underground distribution line L mounted on the shelf 30 can be protected from the water flooded to the floor in the underground pipe 10 while being disposed upward as a whole.

The worker operates the operation panel 64 to rotate the motor 62 in the reverse direction when the inside condition of the underground pipe 10 is adjusted and the wire 63 wound on the pulley is released, And the sensing panel 40 are gradually lowered due to their own weight. As a result, each shelf 30 can stably reach its original position along the guide rods 61 and can be held on the support block 68.

As described above, according to the present invention, since a shelf is arranged in a multi-stage inside a conventional underground pipe, the underground distribution line can be reliably fixed at a predetermined interval, so that the flow is prevented. Even if it flows, The information about the underground distribution line is transmitted to the ground worker, so that the maintenance can be performed quickly.

Furthermore, when the bottom of the underground pipe is filled with water, the shelf on which the underground distribution line is placed can be moved upward so that the occurrence of safety accidents due to electric shock can be suppressed.

10, the connector according to the present invention includes a connector body 100 as a means for branching and distributing from an underground pipe 10 to an electric distribution board, An adapter 200 provided in the underground ship DTB into which the underground distribution line L is led, a grip guide 300 disposed in contact with the adapter 200, an adapter 200 and a grip guide 300, And a grip fastener 400 for fastening the fastening member 400.

At this time, a packing member may be further provided at the rear of the grip fastener 400 through the power line inserting portion 401 of the grip fastener 400.

Thus, regardless of the length of the underground distribution line L, the underground distribution line L passes through the connector according to the present invention to the inside of the underground ship DTB without being tangled or tangled on the outside of the underground ship DTB. It is possible to increase the space efficiency, to facilitate the passage of the operator, and to make the appearance of the worker clean. When the underground distribution line L is pierced with the adapter 200 and then packed with the packing member, It is possible to completely block infiltration of infiltration water penetrating from the inside.

Herein, the ground conductor DTB is an example of a switchboard, and the connector is a means for stably fixing the underground distribution line L when the switchboard is branched.

In addition, the adapter 200 is provided in the form of a cylinder in the underground ship DTB, and an electric power distributing vessel 201 through which the underground distribution line L is passed is formed inside and is connected to the outside of the underground ship DTB A male thread is formed over the entire outer circumferential surface to be exposed.

In addition, the grip guide 300 is formed in a cylindrical shape having a male screw thread over the entire outer circumferential surface, and a distribution line through hole 301 communicating with the power distributing tool 201 is formed therein. The grip insertion guide portion 310 is formed inside the distribution line through hole 301 so that the inner diameter of the distribution line through hole 301 gradually decreases from the end toward the end contacting with the adapter 200. [

As a result, a male thread is formed on the outer circumferential surface of the adapter 200 and the grip guide 300 and a female screw thread is formed on the inner circumferential surface of the grip fastener 400 so that the grip fastener 400 is inserted between the adapter 200 and the grip guide 300 So that the fastening force can be further improved so that the fastening can be further strengthened, and particularly, the fastening force can be improved to prevent the vibration loosening and the like.

The grip guide 300 includes a plurality of insertion pieces 320 projecting toward the adapter 200 from the end contacting with the adapter 200 and formed symmetrically about the circumference of the distribution line through hole 301, It is preferable that a plurality of insertion piece receiving grooves 210 are formed in the inner circumferential surface of the adapter 200 so as to correspond to the insertion piece 320 along the circumference of the power distributing tool 201.

When the grip guide 300 is previously brought into contact with the adapter 200 before the grip guide 300 is fastened to the adapter 200 by the grip fastener 400, The insertion member 320 of the grip guide 300 is inserted into the groove 210 to be engaged with the adapter 200 so that the grip guide 300 is previously fixedly coupled to the adapter 200, So that it can be performed more easily.

The grip fastener 400 is provided in the shape of a cylinder so that a guide inserting hole 410 having a female screw thread is formed to surround the adapter 200 and the grip guide 300 so as to be fastened, The grip guide 300 is horizontally disposed along the longitudinal direction inside the guide inserting hole 410 until the grip guide 300 is inserted into the guide inserting hole 410 The power supply line grip portion 420 is formed inside the power supply line insertion portion 401 so that the power supply line insertion portion 401 is deformed to be collapsed due to contact with the grip insertion guide portion 310.

Before the adapter 200 and the grip guide 300 are fastened by the grip fastener 400, the underground distribution line L is freely inserted into or withdrawn from the underground ship DTB through the connector body 100 And the ground distribution line L is connected to the underground distribution line L regardless of the length of the ground distribution line L by causing the distribution line grip portion 420 to collapse so that the underground distribution line L is fixed after the connection, (DTB) of the underground ship (DTB) by the power distribution connector (100) connected to the submerged ship (DTB) without being tangled or tangled outside the underground ship So that the worker can be made to pass easily, and the appearance can be made clean.

11, a grounding angle 500 in which a plurality of bolt holes 510 are formed in the underground ship DTB is inserted into a bolt hole 510 to facilitate the grounding of the underground distribution line L. As shown in FIG. Lt; / RTI >

At this time, a plurality of bolt holes 510 are formed at regular intervals along the longitudinal direction of the grounding angle 500 in order to freely set the installation position of the grounding angle 500. That is, the grounding angle 500 is designed so that it can be installed easily regardless of the position, and the grounding angle 500 has a cross-sectional shape of 'a' shape.

In addition, a grounding compressed copper terminal 520 is fastened to one of the bolt holes 510, and one end of a connecting ground wire 530 is fixed to the grounding compressed copper terminal 520 in a compression manner, And the other end of the ground wire 530 is fixed to one end of the copper socket 540 which is approximately '

A ground wire 550 is connected to the other end of the copper socket 540. The ground wire 550 is preferably connected by a known quick coupling method.

In addition, in the present invention, in order to stably temporarily fix the underground distribution line L when the connector is connected to prevent pulling due to tension, and to make the connecting operation easy and convenient, the auxiliary fixing unit 1300 for connector connection .

The auxiliary fixing unit 1300 for connector connection includes an auxiliary fixing unit 1300 for connector connection, including a fixed body 1310 and a tightening body 1320.

At this time, the fixed body 1310 and the tightening body 1320 are formed in a substantially ∩ shape, and when they are coupled to each other, the open sides of the fixed body 1310 and the tightening body 1320 are engaged with each other so as to face each other.

Particularly, the fixed body 1310 is formed with a power distribution line insertion hole 1311 at the center of both sides thereof, and a part of the power distribution line insertion hole 1311 is opened to form an open portion 1312, Is inserted into the distribution line insertion hole 1311 through the opening portion 1312. [

The upper surface of the fixed body 1310 is closed, and a body bolt hole 1314 is formed at the center of the closed upper surface by tapping.

In addition, an assembly groove 1315 is formed on both sides of the fixed body 1310 in a direction orthogonal to the power distribution line insertion hole 1311 so that both ends of the tightening body 1320 can be fitted.

At this time, the mounting groove 1315 is formed to be recessed by both end thicknesses of the tightening body 1320, so that when both ends of the tightening body 1320 are fitted up and down, The quality can be further increased.

Meanwhile, the tightening body 1320 is a '∩' shaped member having the same height as or smaller than the fixed body 1310, and is configured to be staggered at an upper portion of the fixed body 1310 as shown in the figure.

At this time, a tightening body bolt hole 1321 is formed at the center of the upper surface of the tightening body 1320 so that the fastening bolt 1322 can be fastened.

Accordingly, the bent ends of the tightening body 1320 are respectively fitted into the assembling recesses 1315 in a sliding manner so that the tightening body 1320 can form a body with the fixed body 1310 .

In this case, both ends of the tightening body 1320 are inserted in the form of wrapping the underground distribution line L so that the underground distribution line L is inserted into the tightening body 1320.

When the fastening bolt 1322 is tightened, the fastening body 1320 and the fastening body 1310 come close to each other and come into close contact with each other. At the same time, the lower end of the fastening bolt 1322 comes into contact with the outer surface of the underground distribution line L, The ground distribution line L is trapped inside the tightening body 1320 so that the underground distribution line L is not released and the ground distribution line L is temporarily suspended until the connector is completely installed. (L) can be securely fixed.

After the connector is installed, only the fastening bolt 1322 is disassembled and can be easily separated.

Particularly, an extended horizontal piece 1330 is formed on one side of the fixed body 1310 and an extended vertical piece 1340 extending vertically is further formed on the end of the extended horizontal piece 1330 And a fixing hole 1350 is formed in the extended vertical piece 1340 so that the auxiliary fixing unit 1300 for connector connection can be temporarily fixed to one side of the underground ship DTB, .

In addition, in the present invention, the fastening structure of the fastening bolt 1322 is improved to increase the fastening force, and the fastening bolt 1322 can be easily tightened and loosened without loosening, Can be improved.

13, the tightening body bolt hole 1321 is formed to be larger than the body bolt hole 1314 formed in the fixed body 1310, and the fastening bolt 1322 is formed on the body bolt hole 1314, Respectively.

The modified bolt assembly structure according to the present invention includes a guide bush 2100 which is fixedly inserted into the tightening body bolt hole 1321 in order to enhance the tightening stability and enhance the anti-loosening function, And the fastening bolt 1322 is designed to move in the guide bush 2100.

One end of the tension retaining spring 2200 is seated on the stepped surface of the guide bush 2100 and the other end of the tension retaining spring 2200 is fastened to the bolt head of the fastening bolt 1322. [ (2010).

The guide bush 2100 is formed on the outer circumferential surface of the guide bush 2100 so that the guide bush 2100 can be moved along the guide bushing 2100. A grip piece 2400 on the upper end of the guide bushing 2100, ).

In this case, the gripping piece 2400 can be raised and lowered around the hinge 2500. When the gripping piece 2400 is raised, it is shaped to fit the bolt head 2010.

Therefore, when the fastening bolt 1322 is fastened, the bolt head 2010 is tightened to the body bolt hole 1314 while compressing the tension holding spring 2200, so that the tension is always applied and the contact friction between the pitches becomes large It is not loosened.

Further, when the gripping pieces 2400 are tightened or loosened, the gripping pieces 2400 are gripped with the fingers in a state where the gripping pieces 2400 are assembled to the bolt head 2010, so that it is not necessary to use a separate tightening tool.

Further, when tightening, the fluid ring 2300 descends on the outer circumferential surface of the guide bushing 2100 and is brought into close contact with the surface of the tightening body 1320, so that a more reliable and stable fastening structure can be achieved.

At this time, the tightening body 1320 and the fixed body 1310 should be able to improve insulation, heat stability, durability, and corrosion resistance.

To this end, the tightening body 1320 and the fixed body 1310 are formed by mixing 1.5% by weight of rosmarinic acid, 1.5% by weight of EGCG (Epigallocatechin gallate), 2.5% by weight of a water-soluble acrylic- 3.0% by weight of zinc oxide (Zn (NO ₃ ) ₂ .6H ₂ O), 2.5% by weight of 1-chloro-2,3-epoxypropane, 2.5% by weight of methyltrimethoxysilane, 3.5% by weight of an allophane powder having an average particle diameter of 0.5 μm, 5.5% by weight of a resin liquid in which a polyurethane resin was dissolved with decyl ether, 4.0% by weight of sodium acetate (CH ₃ COONa · 3H ₂ O) , 6.0 wt% of zirconium oxide powder having a particle size of less than 0.1 mu m, 5.0 wt% of copper thiocyanate, 2.5 wt% of methylhydroxyethylcellulose (MEHEC), 8.5 wt% of a resin-silica composite and the balance of polycarbonate resin .

The above-mentioned Rosmarinic Acid and Epigallocatechin gallate (EGCG) are added in order to enhance antimicrobial properties so as to prevent contamination. The water-soluble acrylic-modified urethane-alkyd resin imparts adhesiveness to enhance binding between the compositions And is added for expressing super water repellency.

In addition, zinc sulfate is added to enhance thermal stability by increasing the heat retaining force due to the formation of eutectic points. 1-Chloro-2,3-epoxypropane is a chlorine-based material having high reactivity and is used for stabilizing the reaction of the composition And methyltrimethoxysilane is added to enhance durability by enhancing the bonding force between emulsified materials by hydrophobicity.

In addition, alophene powder is a clay mineral generated from the weathering process of volcanic ash, which is an exceptionally amorphous clay powder which has no crystal structure and is added to enhance the VOC abatement effect. The resin liquid in which the polyurethane resin is decolorized with ether It is used to maintain adhesion and weatherability.

In addition, sodium acetate is added in order to enhance durability and heat resistance by strengthening the heat retention due to the formation of eutectic points, and since formic acid is prepared by adding glycerin to aquatic acid, .

The zirconium oxide powder is an amorphous white powder which is added as a kind of ceramics having a melting point of 2.677 캜, a density of 5.6 g / cm ³ and a Mohs hardness of 7 in order to increase the hardness and to strengthen the wear resistance, and the thiocyan copper is added to the copper- , And MEHEC (methylethylhydroxyethylcellulose) is added as a cellulose derivative composed of anhydrous glucoside monomer chain to enhance surface activity and chemical resistance.

In addition, the resin-silica composite is heated at a temperature of 600-800 ° C. in a state in which the colloidal silica and the acrylic polymer are immersed in a mixture of the acrylic polymer and the acrylic polymer in a weight ratio of 1: 1, To have a resin-silica composite form according to condensation.

At this time, the condensation reaction is carried out as follows, and the film adhesion and the texture density are drastically improved.

[Colloidal silica: - (HO-Si-OH-) n]

[Acrylic polymer: CH2CCH3CO-OH]

[- (HO-Si-OH- ) n + CH2CCH3CO-OH = - (HO-Si-O-CH2CCH3CO) - n + H 2 O]

In addition, the polycarbonate resin is added for high transparency and high hardness, strength maintenance and durability improvement.

A sample having such a coating layer was prepared, and water resistance was first tested to confirm the surface condition.

In the water resistance test, the sample pipe was immersed in a constant temperature water bath (60 ° C.), and the surface state was checked in units of 500 hours. As a result, no microscopic whitening, cracks, or white rust occurred.

In order to confirm the heat stability, the sample pipe was placed in a beaker, sealed (60 ° C), left in a dry oven for 5 days, and the state was measured. As a result, there was no surface reaction such as gelation.

In addition, to confirm the corrosion resistance, the sample pipe was tested according to KS-D-9502 (standard 240 hr) salt spray test method, and the result was good without occurrence of white rust.

In addition, since the fastening bolt 1322 according to the present invention sucks the ground distribution line L when fastened, the cover is peeled off and a risk of disconnection, short-circuiting or short-circuiting may occur. Therefore, the end portion of the fastening bolt 1322 has a shape .

Referring to FIG. 14, a tip portion 3000 is detachably assembled to the lower end of the fastening bolt 1322.

At this time, the tip portion 3000 has a substantially inverted trapezoidal shape and a rod mounting groove 3100 having an open upper portion is formed at the center.

A first ball bearing 3200 is disposed on the bottom surface of the rod mounting groove 3100 and a slip disk 3300 is disposed on the upper portion of the first ball bearing 3200. The slip disk 3300 A coupling protrusion 3400 is vertically and integrally protruded from the center and a second ball bearing 3500 is inserted into the coupling protrusion 3400 so as to be opposed to the first ball bearing 3200 with respect to the slip disk 3300 .

In this state, the fixing member 3600 is seated and fixed to the tip portion 3000, so that the ball bearings including the slip disk 3300 are fixed so as not to separate and separate.

The engaging projection 3400 is exposed to the outside through the center of the fixing piece 3600 and the exposed end is inserted into the engaging portion 4000 formed at the lower end of the fixing bolt 1322, (Not shown).

At this time, the fixing pin 4100 is assembled so as to be completely embedded in the pin hole 4200 penetrating the coupling portion 4000 in the radial direction.

Therefore, when the fastening bolt 1322 is tightened or loosened, the fixing pin 4100 does not interfere with the fastening pin 4100, and free locking and unlocking becomes possible.

Particularly, since the engaging hole 3410 having a diameter corresponding to that of the pin hole 4200 is formed in the engaging projection 3400, the engaging hole 3410 passes through the engaging hole 3410 when the pin is fixed.

Then, even if the fastening bolt 1322 is rotated, the tip portion 3000 is not loosened by the rotation direction.

Since the cushioning member 3700 is press-fitted into the lower end surface of the tip portion 3000 to form a portion in direct contact with the power distribution line L, there is no fear of damaging the underground distribution line L. [

The cushioning material 3700 primarily absorbs the pressure even if the underground distribution line L is pressed by the fastening bolts 1322 and the slip original plate 3300 is rotated by the first and second ball bearings 3200, and 3500), the ground distribution line (L) will not be eaten due to the self rotation (rotation) effect.

Therefore, it is possible to provide a stronger fixing force while preventing disconnection of the ground distribution line (L), electric leakage, peeling of the cover, and the like.

10: underground tube 20: base
30: shelf 40: detection panel
50: control unit 60:

Claims (1)

A base 20 having a rectangular underground pipe 10 buried in the ground and having a receiving space 11 therein and a support base 21 disposed on the bottom surface of the underground pipe and installed in a vertical direction, A sensing panel 40 which is attached to the lower side of the shelf 30 and detects the flow of the underground power distribution line L placed on the upper surface of the shelf 30, And a control unit (50) connected to the upper end of the supporter (21) to detect an abnormal signal sensed by the sensing panel (40) and send information about the abnormality signal to an operator on the ground;
A wire binding member 32 including a top cover 33A and a bottom cover 33B opened and closed through a hinge 34 mounted on one side of the top cover 33A is mounted on the shelf 30, The cover 33A has a hemispherical cap 35a and a flange 35b extending to one side of the cap 35a while the lower cover 33B has a flat plate portion 36b having an arc groove 36a A through hole 37 is formed in the flange 35b and the flat plate portion 36b and is fastened with a bolt 38 and the lower cover 33B is fastened to the flange 35b and the flat plate portion 36b, A pair of elastic latching pieces 39 are formed at the lower end of the shelf 30 so as to be inserted and fixed in the slots 30a formed in the shelf 30. The sensing panel 40 is provided with A photo sensor S having a light emitting portion and a light receiving portion is provided at a position corresponding to the underground distribution line L, Standing and arranged to sense the presence or absence of underground distribution line (L);
The control unit 50 includes an abnormal position determining unit 52 for detecting the unique information of the underground pipe 10, the shelf 30 and the underground distribution line L according to the sensing signal received from the sensing panel 40, A control unit 51 for converting the information provided by the abnormal position check unit 52 and the additional information of the previously stored underground power distribution line L into the monitoring information that can be read by an operator on the ground, 51) for receiving the monitoring information generated by the base station and wirelessly transmitting the monitoring information generated by the base station to the ground operator (53);
The underground pipe 10 is provided with a guide rod 61 penetrating through the support plate 60, each shelf 30 and the sensing panel 40, the shelf 30 and the sensing panel 40, A pair of motors 62 wound around pulleys of these motors 62 and connected to each of the shelves 30 and the sensing panel 40 to rotate the motors 62 forward, A liquid sensing sensor 65 disposed at the bottom of the underground pipe 10, a stopper 66 for maintaining a gap between the shelves 30, A switch 67 mounted on the lower end and operated by a stopper 66, and a support block 68 installed in the lower center of the underground pipe 10, in an underground distribution system;
And a connector main body (100) for branching from the underground pipe (10) and distributing to the switchboard;
The connector main body 100 includes an adapter 200 provided in the underground distribution system DTB into which the underground distribution line L is led, a grip guide 300 disposed in contact with the adapter 200, And a grip fastener (400) for gripping and fastening the grip guide (300);
The adapter 200 is provided in the shape of a cylinder in the underground ship DTB and is formed therein with a power distributor 201 through which the underground distribution line L is passed and is exposed to the outside of the underground ship DTB A male thread is formed over the entire circumference;
The grip guide 300 is formed in a cylindrical shape having a male screw thread over the entire outer circumferential surface thereof and has a distribution line through hole 301 communicating with the distribution player's tool 201, The grip inserting guide portion 310 is formed inside the distribution line through hole 301 so that the inner diameter of the distribution line through hole 301 gradually decreases toward the end portion contacting the adapter 200;
The grip fastener 400 is provided in a cylindrical shape with a guide inserting hole 410 having a female screw thread formed to surround the adapter 200 and the grip guide 300 so as to fasten the adapter 200, The grip guide 300 is horizontally disposed along the longitudinal direction inside the guide inserting hole 410 before being fastened to the grip guide 300 and the guide inserting hole 410 is formed in the guide inserting hole 410, A distribution line grip portion 420 for forming a distribution line insertion portion 401 so as to be deformed in a collapsed state by being in contact with the grip insertion guide portion 310 as being gradually fastened to the inside of the grip insertion portion 310;
Further comprising an auxiliary fixing unit (1300) for connector connection to temporarily fix the underground distribution line (L) when connecting the underground distribution line (L) through the connector main body (100), wherein the auxiliary fixing unit 1300 includes a fixed body 1310 and a tightening body 1320 formed in a shape of ∩ and the fixed body 1310 and the tightening body 1320 are stitched to each other, A portion of the power distribution line insertion hole 1311 is cut to form an opening 1312. A movable table 23 is fixed to the center of the bottom surface of the fixed body 1310 And an attachment groove 1315 in which both ends of the tightening body 1320 are respectively fitted are formed on both upper surfaces of the upper portion of the fixed body 1310 in a direction orthogonal to the power line insertion hole 1311, A body bolt hole 1314 is formed in the center of the upper surface of the fixed body 1310, A tightening body bolt hole 1321 is formed on the upper surface of the tightening body 1320 corresponding to the body bolt hole 1314 and the fastening body bolt hole 1321 and the body bolt hole 1314 are fastened The bolts 1322 are fastened so that the lower ends of the fastening bolts 1322 press the underground distribution line L while fastening the fastening body 1320 and the fastening body 1310 together;
An extended horizontal piece 1330 having a predetermined length is further formed on one side of the fixed body 1310 and an extended vertical piece 1340 extending vertically is formed at an end of the extended horizontal piece 1330, A fixing hole 1350 is formed in the extended vertical piece 1340 so that the auxiliary fixing unit 1300 for connector connection can be temporarily fixed to one side of the underground ship DTB;
The tightening body bolt hole 1321 is formed to be larger than the body bolt hole 1314 formed in the fixed body 1310 and the fastening bolt 1322 is fastened to the body bolt hole 1314. The fastening body bolt hole 1321 is formed in the body bolt hole 1314, Further comprising a guide bushing (2100) which is inserted and fixed in the guide bushing (2100), wherein the fastening bolt (1322) is designed to move within the guide bushing (2100);
One end of the tension retaining spring 2200 is seated on the stepped surface of the guide bush 2100 and the other end of the tension retaining spring 2200 is fixed to the bolt head 2010 of the fastening bolt 1322 );
The guide bush 2100 is formed on the outer circumferential surface of the guide bush 2100 so as to be able to move along the guide bush 2100. A grip piece 2400 of a flat shape is fixed to the upper peripheral surface of the flow bushing 2300, ;
The gripping piece 2400 is constructed so as to be able to be raised and lowered around the hinge 2500. When the gripping piece 2400 is erected, the gripping piece 2400 is shaped to fit the bolt head 2010;
A grounding angle 500 having a plurality of bolt holes 510 is bolted to the underground ship DTB through a bolt hole 510 for grounding the underground distribution line L, A plurality of grounding angles 500 are formed at regular intervals along the longitudinal direction of the grounding angles 500. The grounding angles 500 have a cross-sectional shape of 'a', and one of the bolt holes 510 has a grounding compressed copper terminal And the other end of the connecting ground wire 530 is connected to the grounding copper terminal 520 by a copper wire 540 in a ' A ground wire 550 is connected to the other end of the copper socket 540;
A tip portion 3000 is detachably assembled to the lower end of the fastening bolt 1322. The tip portion 3000 has an inverted trapezoidal shape and a rod mounting groove 3100 having an open upper portion is formed at the center, A first ball bearing 3200 is disposed on the bottom surface of the rod mounting groove 3100. A slip disk 3300 is disposed in contact with the upper portion of the first ball bearing 3200, The protrusion 3400 protrudes vertically and integrally with the second protrusion 3400. The protrusion 3400 is disposed opposite to the first ball bearing 3200 with respect to the slip disc 3300 while the second ball bearing 3500 is inserted into the protrusion 3400, A fixing member 3600 is seated and fixed to the tip portion 3000 so that the ball bearings including the slip disk 3300 are not detached and separated. The coupling protrusion 3400 penetrates the center of the fixing member 3600 and is exposed And the exposed end is fixed to the lower end of the fastening bolt 1322, The fixing pin 4100 is inserted into the pin 4000 and then fixed by the fixing pin 4100. The fixing pin 4100 is assembled in a state that it is completely buried in the pin hole 4200 penetrating the coupling portion 4000 in the radial direction, Wherein the cushioning member (3700) is press-fitted into the lower end surface of the tip portion (3000) so as to be in direct contact with the power distribution line (L).

Images