KR200434030Y1 - Braided connection for low voltage cable disconnection of ground transformers - Google Patents

Abstract

The present invention relates to a connection device for low voltage cable disconnection of a ground transformer, and more specifically, to temporarily lock one side of the braided wire wrapped with a low voltage cable to one side of the main body, and then temporarily lock the other side to a mobile contact hole for horizontal movement. By pulling the fixed braided wire further, the work can be done quickly, and the braided wire is more securely tightened by the fastening means such as a tannery bolt to the mobile contact hole, which effectively prevents the braided wire from being disconnected from the connecting device by inadvertent external force. Disclosed is a low voltage cable disconnecting device for a ground transformer.

Transformer, low voltage cable, braided wire, working bolt, moving contact hole, loosening prevention

Description

Braided-wire type access device for separation low-voltage cable of transformer

1 is a perspective view of the use state of the braided linear connecting device of the present invention.

2 is an exploded perspective view of FIG.

Figure 3 is a plan sectional view of Figure 1 showing a coupling state of the braided linear connection device of the present invention.

4 is a longitudinal sectional view showing the ratchet coupling state of FIG.

Figure 5 is a cross-sectional view showing an initial state to wrap the clip of the braided linear connection device of the present invention in a low-voltage cable.

Figure 6 is a cross-sectional view showing a clip of Figure 5 is temporarily fixed by wrapping the low-voltage cable.

7 and 8 are cross-sectional views of the operation state showing that the low-voltage cable temporarily fixed by the clip is securely fixed by the moving contact hole moved outwardly from the main body 10.

9 is a cross-sectional view showing another embodiment of the present invention.

** Explanation of symbols for main parts of drawings **

10: main body 11: groove for locking

16: bearing 20: moving contact hole

30: operating bolt 40: guide rod

50: braid 51, 53: connector

52: locking rod 60: loosening prevention device

61: stop 63: ratchet wheel

The present invention relates to a connection device for low voltage cable disconnection of a ground transformer, and more specifically, to temporarily lock one side of the braided wire wrapped with a low voltage cable to one side of the main body, and then temporarily lock the other side to a mobile contact hole for horizontal movement. By pulling the fixed braided wire further, the work can be done quickly, and the braided wire is more securely tightened by the fastening means such as a tannery bolt to the mobile contact hole, which effectively prevents the braided wire from being disconnected from the connecting device by inadvertent external force. The present invention relates to a connection device for disconnecting low voltage cables of ground transformers.

In general, underground power distribution lines have 22.9 KV of extra high voltage (primary side) supplied through power transmission lines from power plants when power is supplied to various equipments for home and industrial use. The ground transformer is used as a means for dropping the voltage to supply to the vehicle side.

The above ground transformer has an elbow connecting member connected to the end of the extra high voltage cable on the primary side to which the extra high pressure is supplied, and the connecting terminal connected to the end of the secondary side low voltage cable to supply the low pressure is connected to the secondary side bushing. It is made of a structure that is connected to.

Such a ground transformer should be replaced with a transformer that operates normally when an abnormality (fault) occurs in the transformer due to aging or overload. In this case, the ground transformer is formed by separating the high voltage cable and the low voltage cable from the primary and secondary bushings. Will be exchanged.

In particular, the transformer is exchanged in a temporary power failure state in which the power supply of the transformer is cut off when the ground transformer is disconnected, or the transformer is exchanged while the power supply of the transformer is continuously connected and connected to the customer.

That is, when the transformer is replaced with an uninterrupted live state, the secondary low voltage cable is continuously connected to the customer.

At this time, the secondary side connecting terminal to which the low voltage cable is connected is divided into an integral type of integrally coupled with the bushing and a detachable type that is screwed to the bushing. Since no separate device is provided for separation, there is a problem that safety and workability are deteriorated.

In order to solve such a conventional problem, the patent application No. 2006-0067411, filed July 19, 2006, filed by the applicant of the present invention, "clip-type connection device for disconnecting the low voltage cable of a ground transformer" is a secondary power supply when the transformer is replaced. The side low voltage cable was disconnected in the connected state, but the connecting terminal connected to the low voltage cable was integrally connected with the secondary side bushing so that the clip was effectively detachable with only the end of the low pressure cable connected and clamped. The formed support protrusion is caught by the locking jaw portion of the main body is separated by the careless external force of the outside has a problem in that the contact between the clip and the low-voltage cable is poor and the safety is impaired.

The present invention was developed to solve the problems of the applicant's prior application technology,

The purpose of the present invention is to disconnect the secondary low voltage cable in the uninterrupted state when replacing the transformer, but completely wrap the low voltage cable to prevent the part surrounding the low voltage cable from being released by inadvertent external force, thereby preventing the contact of the low voltage cable. It is to provide a connection device for low voltage cable disconnection of a ground transformer that has been securely connected and clamped to maximize safety and workability.

Connection device for low-voltage cable separation of the ground transformer of the present invention for achieving the above object,

The main body has a hole for operating bolts and guide rods formed on one side thereof, and a groove for fastening fastening of the braided wire is formed on one side of the surface on which the holes are formed.

A movable contact hole formed with an operating bolt screw hole corresponding to an operating bolt hole and a guide rod hole of the main body, and a screw hole for a guide rod, respectively, and having a U-shaped groove formed on a side thereof to correspond to the locking fixing groove of the braided wire;

The moving contact hole is coupled to the operating bolt hole of the main body and the operating bolt screw hole of the moving contact hole so as to move horizontally from the main body, and has a head at one end and a threaded part is formed at the outer periphery of the other end, and the nut is fixed to the other end. Working bolts,

A guide rod having a threaded portion at one outer circumference to be coupled to the guide rod hole of the main body and the guide rod screw hole of the moving contact hole so that the movable contact hole is horizontally extended from the main body;

A locking device for locking the operation bolt which is located between the main body and the moving contact hole and mounted to the main body to control the rotational direction of the operation bolt rotating through the main body and prevent the loosening of the operation bolt;

Braided wire to which the connector with clip fixing rod is coupled at one end to be fixed to the locking groove of the main body, and the connector for connecting cable is coupled to the other end.

As the movable contact hole is moved away from the main body by the rotation operation of the operation bolt, the braided wire wrapped with the low voltage cable is firmly fixed to the hook fixing groove of the braided wire.

In addition, the present invention can be more surely prevented from the separation of the braided wire coupled to the connecting cable by fastening the bolt to the side of the braided wire guided to the U-shaped groove of the mobile contact hole to prevent the detachment of the braided wire.

It wraps around the low pressure cable and secures it by hooking it into the locking fixing groove of the main body, while the other side is guided by the U-shaped groove opened in parallel with the low pressure cable, and the connector of the connecting cable contacting the outer surface of the mobile contact is connected from the U-shaped groove. By further tightening the braided wire in the U-shaped groove with a screw to prevent it from being detached, the braided wire is prevented from being inadvertently detached from the moving contact hole by the external contact.

In addition, the present invention is to install a bearing in the hole inlet for the operation bolt of the main body to which the operation bolt is coupled so that the operation bolt is coupled to the bearing to reduce the rotational frictional resistance of the operation bolt.

Hereinafter, the braided connection device for separating the low voltage cable of the ground transformer of the present invention will be described in more detail with reference to the accompanying drawings.

1 to 8 is an embodiment of the present invention, Figure 9 is another embodiment of the present invention.

The braided linear connection device for low voltage cable separation of the ground transformer of the present invention

The main body 10, the moving contact hole 20, the operation bolt 30 to separate the moving contact hole 20 from the main body 10, and the rotation operation of the operation bolt 30 from the main body 10 It consists largely of a braided wire 50 that is pulled and fixed in the locking fixing groove 11 by the moving operation of the moving contact hole 20 spaced apart.

In addition, it is located between the main body 10 and the moving contact hole 20 to prevent the reverse rotation of the operation bolt 30 to prevent the loosened braided wire 50 is mounted on the main body 10 and operated Preferably, the locking device 60 is further included to couple to the bolt 30.

The shape of the main body 10 is approximately rectangular, and the braiding line fixing groove 11 for protruding the braiding line on one side is protrudingly formed, and an operation bolt to perform the forward and backward operation of the movable contact hole 20 ( A hole 12 for the operation bolt to which the 30 is rotatably fitted is formed to penetrate and prevent the rotation of the movable contact hole 20 itself and guide the linear movement during the forward and backward operation of the movable contact hole 20. A guide rod hole 13 is formed outside the operation bolt hole 12 of the main body 10.

The outer side of the hole for the actuating bolt 12 is formed with a larger hole by a countersinking operation to accommodate the head 31 of the actuating bolt 30. The main body 10 is further provided with a locking piece coupling screw hole 14 and a pin mounting pin hole 15 for mounting the anti-loosening device 60.

In addition, the body 10 is formed with a blind hole for mounting the anti-loosening device 60 to prevent the reverse rotation of the operation bolt (30). That is, the screw hole 14 which rotatably fixes the ratchet pawl 61 which meshes with the gear of the ratchet wheel 64 constituting the locking device 60 and It is preferable that the spring 65 pinning hole 15 is further formed to act to return to the original position quickly after deactivation of the stop piece 61.

The moving contact hole 20, which is horizontally moved from the main body 10 by the rotation operation of the operation bolt 30 rotatably coupled to the main body 10, serves to pull and fix the braided wire 50. In response to the hole 12 for the operation bolt of the main body 10, the operation bolt coupling screw hole 22 is formed therethrough, and the U-shaped groove 21 for guiding and fixing the braided wire 50 on the outside thereof is provided. A guide rod screw hole 23 is formed adjacent to the U-shaped groove 21 and corresponding to the guide rod hole 13 of the main body 10 to which the guide rod 40 is screwed.

In addition, the outer surface of the U-shaped groove 21 is preferably formed through the screw hole 24 through which the tanned bolt 25 is screwed to further secure the braided wire 50 in the U-shaped groove 21.

The actuating bolt 30, which is rotatably coupled to the actuating bolt hole 12 of the main body 10, and the actuating bolt screw hole 22 of the movable contact hole 20, has a male thread portion 32 at the outer periphery of the tip. ) Is formed and the head 31 is formed at the other end thereof. A nut 33 is fastened to the tip of the male screw 32 of the actuating bolt 30 to prevent the actuating bolt 30 from being separated from the main body 10 and the movable contact hole 20, and the fastened nut 33 Is completely fixed by welding or the like.

The socket 33 of the tool 72 is inserted into the fixed nut 33 and the nut 33 is rotated by the tool 72 so that the nut 33 and the fixed operating bolt 30 are integrally rotated. .

In addition, the guide rod 40 coupled to the main body 10 and the movable contact hole 20 to guide the horizontal movement of the movable contact hole 20 also has a male thread portion 41 on only one outer circumference similar to the operation bolt 30. Is formed.

Meanwhile, a ratchet wheel having a gear or a tooth (hereinafter referred to as a gear) formed on the outer circumference of the anti-loosening device 60 positioned between the main body 10 and the movable contact hole 20 and mounted to the main body 10. 63 is a screw hole 64 is formed in the center to be screwed with the male screw portion 32 of the operation bolt (30).

And the rod-shaped stop piece 61 which has the inclined part which engages with this gear in the front-end | tip so that the rotation direction of this ratchet wheel 63 may be engaged with the screw hole 14 with the screw 67, and the rod-shaped stops will be rotatable. A screwing hole 62 is formed in the piece 61.

The rod-shaped stop piece 61 mounted on the main body 10 is inclined by one side of the spring 65 to provide a resilient force to the stop piece 61 to prevent reverse rotation of the ratchet wheel 63. While the rear part on the opposite side is supported, the other side of the spring 65 is locked by the pin 66 coupled to the pin hole 15 of the main body 10 to support the rear of the stop piece 61. ), The repulsive force of the spring 65 always acts clockwise in the drawing.

The spring 65 provided in this way prevents the reverse rotation of the ratchet wheel 63 in the counterclockwise direction (counterclockwise direction), so that the actuating bolt 30 to which the ratchet wheel 63 is screwed is also counterclockwise. Rotation is prevented (see FIG. 4).

The main body 10 configured as described above and the braided wire 50 fixed by the moving contact hole 20 horizontally moved by the operation bolt 30 have a secondary low voltage cable 70 at one end thereof. The connector 51 having a locking rod 52 is coupled and fixed to wrap and lock the locking fixing groove 11 of the main body 10, and the other end thereof is connected to the U-shaped groove 21 of the mobile contact hole 20. The connector 53 connected to the cable 71 is inserted and guided so as to be inserted and guided.

FIG. 9, which is another embodiment of the present invention, shows a bearing (at a portion where the head of the operation bolt contacts) of the operation bolt hole 12 formed in the main body 10 to achieve smooth rotation of the operation bolt 30. 16) of the low-voltage cable 70 to the corresponding portion of the main body 10 so that the low-voltage cable 70, which is pulled toward the main body 10 side at the time of pulling and fixing the braided wire 50, is more secured. Same as the components of FIGS. 1 to 8 except that the recessed portion 17 is formed such that the surface contact becomes larger.

The operation and effects of the braided linear connection device for low voltage cable separation of the ground transformer of the present invention configured as described above will be described in more detail below.

The braided linear connecting device for separating the low voltage cable of the ground transformer according to the present invention is prevented from loosening so that the locking piece 61 can be rotated at a predetermined angle by the elastic force of the spring 65 by using the screw 67 and the pin 66. The device 60 is mounted to the main body 10.

And using the guide rod 40 and the operation bolt 30 is assembled and connected to the main body 10 so that the movable contact hole 20 is horizontal guide and movable. At this time, the ratchet wheel 63 engaged with the stop piece 61 of the loosening prevention device 60 is screwed to be positioned between the main body 10 and the movable contact hole 20 to the operation bolt 30.

After coupling the nut 33 to the male screw 32 of the operation bolt 30 and completely fixed to each other by welding or the like. In addition, the screw hole 24 formed on the side surface of the movable contact hole 20 is screwed in advance so that the tanned bolt 25 does not protrude into the U-shaped groove 21, and the guide rod 40 is screwed for the guide rod. The screw hole 23 is also sealed with the tannery bolts 25.

In addition, the bearing 16 may be mounted to the outer inlet portion of the operation bolt hole 12 of the main body 10 for smooth rotation of the operation bolt 30.

When the assembly is completed as described above, the connecting device engages the tool 72 to the nut 33 and rotates the movable contact hole 20 to move horizontally (see FIG. 7). That is, when the operating bolt 30 is rotated in the clockwise direction by the tool 72, the locking piece 61 of the release device 60 meshes with the gear formed at the outer periphery of the ratchet wheel 63 to operate the bolt 30. Reverse rotation is prevented.

At this time, the braided wire 50 having one side coupled to the cable 71 is inserted into the U-shaped groove 21 of the mobile contact hole 20, and then the other side of the braided wire 50 is wrapped around the low pressure cable 70 to form the main body 10. The locking rod 52 is temporarily coupled to the locking fixing groove 11 to be temporarily fixed.

Thereafter, when the nut 33 is rotated in the clockwise direction using the tool 72, the main body of the operation bolt 30 is idle, and the male part 32 is a screw hole for the operation bolt of the movable contact hole 20. Since it is screwed with the 22), the movable contact hole 20 is moved away from the main body 10. Of course, since the movable contact hole 20 is coupled to the main body 10 by the guide rod 40, the movable contact hole 20 itself is prevented from rotating during the movement of the movable contact hole 20 (see FIG. 7).

As the nut 33 is rotated further clockwise, the braided wire 50 wrapped around the low pressure cable 70 is pulled toward the cable 70 by the movable contact hole 20, so that the locking fixing groove of the main body 10 is rotated. (11) further locking is achieved.

At the same time, the locking piece 61 of the anti-loosening device 60 is engaged with the gear of the ratchet wheel 63 so that the operation bolt 30 is prevented from rotating in the opposite direction, so that the locking bar 52 of the braided wire 50 is The locking fastening groove 11 is more firmly and surely locked (see Fig. 8).

Furthermore, the braided wire 50 located in the U-shaped fixing groove 21 of the mobile contact hole 20 is further contact-fixed by screws by screwing the tannery bolt 25, so that the braided wire is seen by careless external force. Departure from the connecting device of the invention is prevented.

On the contrary, the bearing 16 mounted on the outer inlet of the hole 12 for the operation bolt of the main body 10 has a male thread (a male screw portion) of the operation bolt 30 when the nut 33 is rotated by the tool 72. The rotation operation of the operation bolt 30 is smoothly performed by the bearing 16 mounted to reduce the frictional contact between the outer circumference 32 and the inner surface of the hole 12 for the operation bolt.

As the movable contact hole 20 moves away from the main body 10, the low pressure cable 70 is formed on the outer surface of the main body 10, that is, the recess 17 of the main body in which the secondary low pressure cable 70 is fixed in contact. ), The low pressure cable 70 is more securely fixed to the main body 10 (see Fig. 1).

In order to move the movable contact hole 20 to the main body 10 after replacement of the transformer, the tool 72 is first released while the stop piece 61 of the release preventing device 60 is not engaged with the ratchet wheel 63. When the nut 33 is rotated in the opposite direction, that is, counterclockwise, unlike the above, the movable contact hole 20 is moved toward the main body 10 by the rotation of the operation bolt 30 to pull the braid 50. The locking lock is loosened and the nut 33 is rotated counterclockwise until the locking bar 52 is finally released from the locking groove 11 of the main body 10. Thereafter, the braided wire 50, which has wrapped the low pressure cable 70, is released from the low pressure cable 70, and the tannery bolt 25 fixed to the cable 71 is released to move the contact hole 20 and the braided wire ( Release contact 50).

The low-voltage cable separation braided connection device of the ground transformer of the present invention, which is configured and acts as described above, further prevents inadvertent detachment of the braided wire by further screwing the coupling between the catching rod and the locking fixing groove and the mobile contact hole and the cable with the bolt. As well as the secondary cable and the cable is made easy and quick connection is a useful design having the effect of maximizing safety and workability.

Claims (5)

In the low voltage cable disconnection device of the ground transformer, The main body has a hole for operating bolts and guide rods formed on one side thereof, and a groove for fastening fastening of the braided wire is formed on one side of the surface on which the holes are formed. A movable contact hole formed with an operating bolt screw hole corresponding to an operating bolt hole and a guide rod hole of the main body, and a screw hole for a guide rod, respectively, and having a U-shaped groove formed on a side thereof to correspond to the locking fixing groove of the braided wire; The moving contact hole is coupled to the operating bolt hole of the main body and the operating bolt screw hole of the moving contact hole so as to move horizontally from the main body, and has a head at one end and a threaded part is formed at the outer periphery of the other end, and the nut is fixed to the other end. Working bolts, A guide rod having a threaded portion at one outer circumference to be coupled to the guide rod hole of the main body and the guide rod screw hole of the moving contact hole so that the movable contact hole is horizontally extended from the main body; A locking device for locking the operation bolt which is located between the main body and the moving contact hole and mounted to the main body to control the rotational direction of the operation bolt rotating through the main body and prevent the loosening of the operation bolt; Braided wire to which the connector with clip fixing rod is coupled at one end to be fixed to the locking groove of the main body, and the connector for connecting cable is coupled to the other end. Braided wire connecting device for separating the low voltage cable of the ground transformer, characterized in that consisting of. The method of claim 1, The loosening prevention device of the actuating bolt is located between the movable contact holes and is fitted to the threaded portion of the actuating bolt. For disconnecting the low voltage cable of the ground transformer, characterized in that it consists of a ratchet pawl and a spring fixing pin coupled to the pin hole of the main body to secure the one end of the spring to provide resilience to the stop piece. Braided Linear Connection. The method of claim 1, A braided linear connection device for low voltage cable separation of a ground transformer, characterized in that the bearing is further mounted to the hole inlet for the operation bolt of the body to which the operation bolt is coupled. The method of claim 1, The main body is a braided linear connecting device for separating the low-voltage cable of the ground transformer, characterized in that the locking piece coupling screw hole for mounting the loosening prevention device and the pin mounting pin hole are further formed. The method of claim 1, A main body is a braided linear connecting device for separating low voltage cables of a ground transformer, characterized in that a concave portion is formed to more securely fix the low voltage cable pulled to the main body side when pulling the braided wire.

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