KR101644294B1 - Inter-locking structure grounding elbow type - Google Patents

Abstract

The present invention provides a front shield plate between the main circuit switch and the elbow joint to provide an interlock with the main circuit switch to prevent grounding accidents caused by erroneous operation of the switch, The present invention relates to a grounding elbow-type interlocking structure that improves grounding safety and reduces the size of an insulated housing by removing a grounding switch in an insulated housing. / OFF "state; A front protection plate 6 installed on the front side of the manipulator 18 and the elbow connection member 4 and being moved up and down so as to come in contact with the manipulator 18 side and the elbow connection member 4 side; And an operating portion 15 having a fixing pin 14 which is moved to a "lock / unlock" position according to the "on / off" state of the switch 17 to limit the vertical movement of the front protection plate 6. [ And the front surface protection plate 6 can be interlocked with the operation unit 15 so that the fixing pin 14 of the operation unit 15 is moved to the "unlocked" position when the opening and closing apparatus 17 is in the " The limit switch 14 of the limit switch 10 and the operation unit 15 can be moved to the side of the operation unit 18 when the front cover 6 is vertically moved up to the operation unit 18 side, When the front cover 16 is vertically lowered and positioned on the side of the elbow connection member 4, the limit switch (not shown) is turned on when the front cover 16 is vertically lowered, 10 and the fixing pin 14 of the operating portion 15 are electrically and mechanically interlocked to move to the "Unlock" position, And the fixing pin 14 of the operating portion 15 moves to the "Lock" position when the switch 17 is moved to the "ON" state to shut off the movement of the front protection plate 6. [

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a grounding-type interlocking structure,

More particularly, the present invention relates to an epoxy insulated load switch, and more particularly, to an epoxy insulated load switch which is interlocked with a main circuit switch by providing a front protection plate between a main circuit switch and an elbow connection material, To an earthing elbow type interlocking structure which improves earthing stability by adding a function of detecting before operation and removes the earthing switch in the earthing housing to reduce the size of the earthing housing.

Generally, the elbow connection material is used as an intermediate means for facilitating the detachment when connecting an extra high voltage power device such as a switchgear, a transformer, and the like in an underground wire line, and its application is well known. Various techniques are disclosed. Such an elbow connection member is connected to the bushing of the switch, for example, and is connected to the switch by a cable.

One example of the above-described elbow connection member is disclosed in Patent Document 1.

As disclosed in Patent Document 1, the elbow connection material is formed by covering an inner insulating layer of an insulator such as rubber and a semiconductive protective layer of elastic polymer such as rubber on the inside and outside of the inner insulating layer, A housing having a cable receiving portion in a vertical direction, a bushing joining portion in a horizontal direction, and an insulation plug in a vertical direction, the housing having a left and right corresponding structure; And a stud which is assembled with a bushing and a stud bolt assembled in a protruding state in the center of the insulated plug part and assembled with the bushing and the stud bolt assembled to the opening and closing part, a tightening nut and a test point screwed to the rear end of the stud bolt, An insulation plug which is assembled by molding and is coupled to the voltage detecting portion, Insulation to shield the host point consists of a cap.

Here, the cable is provided with an antenna which is assembled to an insulating sheath so as to be assembled in a flow-preventing and sealing state in an inner space of the cable receiving portion.

Therefore, according to the elbow joint of the above-described Patent Document 1, it is possible to check the live state of the line by sensing the voltage by the test point of the insulated plug, or to check the sag and phase state of the power source side and the load side.

In addition, since the epoxy resin insulating load switch is provided in the insulating housing in the epoxy insulation load switch, the volume of the insulating housing is increased and the economical efficiency is lowered.

Korean Patent Laid-Open No. 10-2008-0024646 (Published Mar. 19, 2008)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for removing a ground switch from an insulated housing provided in an epoxy insulating load switch, Thereby reducing the size of the insulating housing and greatly reducing the defective molding rate of the insulating housing, improving the economical efficiency, and providing a ground interlock device inside and outside the switchgear to enable safe operation of the switchgear .

In addition, the present invention aims to reduce the risk of accidents caused by erroneous operation of the switchgear by using the sensor-type grounding elbow in the grounding operation to perform the grounding operation after the surveillance operation.

As described above, an object of the present invention is to provide a main circuit switch that is provided in each operation device and switches each of the switches to the "on / off" A front protection plate installed on the front surface of the manipulator and the elbow connection member and being moved up and down so as to come in contact with the manipulator side and the elbow connection side; And a control pin which is moved to a "lock / unlock" position according to the "on / off" state of the switch to limit the vertical movement of the front protection plate, When the switch is in the "off" state, the fixing pin of the operating portion is moved to the " Unlock " position so that it is vertically movable toward the operating device, The fixing pin of the operating portion is electrically and mechanically interlocked and moves to the "Lock" position, the closing switch can not be turned on, and when the front cover is vertically lowered and is located on the side of the elbow connection member , The fixing pin of the operating portion is electrically and mechanically interlocked and moves to the "Unlock" position so that the switch can be turned on, Group locating pins of moving the operation part to the "on" state is achieved by a grounding elbow inter-locking structure, characterized in that to block the movement of the front cover to move to the "Lock" position.

In the present invention, the ground switch is removed from the insulating housing of the switch, and the elbow connecting member is provided with an electro-sensor-type ground elbow, so that the grounding operation is performed.

In the present invention, the ground elbow separated and coupled to the elbow joint is characterized by having an electronic sensor capable of confirming whether or not it is live before the grounding operation.

According to the present invention, when the limit switch is turned on / off in conjunction with the vertical movement of the front protection plate and the limit switch is in the "on" state, the control unit moves the fixing pin of the operation unit to the "lock" So that the operating portion can not be inserted and opened.

In the present invention, it is preferable that the front surface protection plate is made of a transparent material (polycarbonate) so that the position of the main circuit switch and the presence or absence of abnormality of the elbow connection material and the insulation housing when the switch is in the " So that it can be confirmed.

According to the present invention, the front protection plate is moved up and down according to the "on / off" state of the switch, thereby protecting the operator from accidents of the elbow connection member and the insulation housing when the switch is in the " And the main circuit switch input port is closed when the switch is in the "off" state so that the ground input can not be performed manually.

According to the present invention, it is possible to reduce the size of the insulating housing and greatly reduce the defective molding rate by removing the grounding switch from the insulating housing provided in the epoxy insulating load switch, thereby greatly improving the economical efficiency of the switch, The interlock function and the grounding operation after detection by the probe-type sensor-type elbow joint material can be performed, thereby greatly improving the safety of the work.

In addition, the present invention is equipped with an interlock so that vertical movement of the front protection plate is not possible in the open state of the main circuit in the normal operation state of the switch, so that it is possible to prevent grounding malfunction caused by the operator, It is possible to reduce the secondary accident caused by the failure of the epoxy insulating housing or the elbow connection material that may occur during the operation of the switchgear. Since the front protection plate uses a transparent material excellent in strength and durability, It can be confirmed by the image camera, and the front protection plate can prevent the breakage of the cable or connection connection part due to the operator's mistake.

In addition, according to the present invention, when the front protection plate moves up and down in the grounding operation, the interlock of the mechanism operates and it is impossible to perform opening or closing operation by remote or field operation (electric or manual) It is possible to prevent the erroneous operation by the operator during the grounding operation by moving to the operating unit portion and to easily identify the working circuit by vertically moving only the front protecting plate of the circuit requiring grounding operation.

1 and 2 are a front view and a side view showing an epoxy insulated load switch according to an embodiment of the present invention.
Figs. 3 to 8 show the interlock operation sequence of the ground elbow in the epoxy insulated load switch disclosed in Figs. 1 and 2. Fig.

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

1 and 2 are a front view and a side view showing an epoxy insulated load switch according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the epoxy insulated load switch according to the embodiment of the present invention includes:

A main circuit switch 20 provided on each of the operation devices 18 for switching each of the switches 17 to an on / off state and a main circuit switch 20 provided on the front side of the operating device 18 and the elbow connecting device 4, Quot; lock / unlock "position according to the" on / off "state of the switch 17 and the up and down movements of the front and rear cover plates 6 And an operation portion 15 having a fixing pin 14 for restricting movement.

The front surface protection plate 6 has a structure capable of interlocking with the operation unit 15 so that the fixing pin 14 of the operation unit 15 moves to the "Unlock" position when the opening and closing apparatus 17 is in the & The fixing pin 14 of the operating portion 15 is electrically and mechanically interlocked with the interlocking portion 18 of the interlocking portion 18 when the front surface protecting plate 6 is vertically raised and positioned on the side of the operating device 18. [ To the "Lock" position so that the opening / closing device 17 can not be turned on,

When the front protection plate 16 vertically descends and is located on the side of the elbow connection member 4, the fixing pin 14 of the operation unit 15 electrically and mechanically interlocks and moves to the "Unlock " 17 of the operation unit 15 is moved to the "Lock" position to shut off the movement of the front protection plate 6 when the switch 17 is moved to the "on" state.

In the above embodiment of the present invention, the ground switch is removed from the insulating housing 1 of the switch 17 and the detection sensor type ground elbow 30 is provided on the elbow connection member 4, .

In addition, the above embodiment of the present invention includes an electronic sensor capable of confirming whether or not the ground elbow separated and coupled to the elbow connecting member 4 is live before the grounding operation.

In the above embodiment of the present invention, when the limit switch 10 is in the ON / OFF state in conjunction with the vertical movement of the front surface protection plate 6 and the limit switch 10 is in the ON state, 16 move the fixing pin 14 of the operating portion 15 to the "lock" position so that the operating portion 15 can not be inserted or opened.

In the above embodiment of the present invention, since the front surface protection plate 6 is made of a transparent material (polycarbonate), the position of the main circuit switch 20 when the switch 17 is in the " And the presence or absence of abnormality of the elbow connecting member 4 and the insulating housing 1 can be visually confirmed.

In the above embodiment of the present invention, the front shield plate 6 is moved up and down in accordance with the "on / off" state of the switch 17 so that when the switch 17 is in the " And the insulator housing 1, so that the ground switch 20 can not be manually grounded by covering the input port of the main circuit switch 20 when the switch 17 is in the "off" state.

The interlocking operation sequence of the ground elbow in the epoxy insulated load switch according to Figs. 3 to 8 and the following Table 1 will be described. Hereinafter, four circuits of the switches will be described as being "on / off", and the detailed description of the other switches will be omitted.

  order Actuator work phase switch
Circuit state interlock function device Front shield
(location) Ground elbow Circuit condition One Actuator normal operation status One ON Prevent "grounding"
interlock operation
(Whole circuit) No vertical movement (elbow side) - 2 ON 3 ON 4 ON 2 Switch 4 "OFF" operation One ON Prevent "grounding"
Disable interlock (4 circuits only) Vertically movable (elbow side) - 2 ON 3 ON 4 OFF 3 Front protection plate Vertical rise One ON Prevent "input"
interlock operation
(4 circuits only) Vertical up movement (actuator side) - 2 ON 3 ON 4 ON 4 Grounding operation of switchgear 4 circuits One ON Prevent "input"
interlock operation
(4 circuits only) Vertical movement not possible (actuator side) Detection sensor type Grounding Elbow connection and disconnection 2 ON 3 ON 4 OFF 5 Front protection plate vertical descent One ON Prevent "input"
Disable interlock
(4 circuits only) Vertical downward movement (elbow side) - 2 ON 3 ON 4 OFF 6 4 switches "ON" operation One ON Prevent "grounding"
interlock operation
(Whole circuit) No vertical movement (elbow side) - 2 ON 3 ON 4 ON

3, all the main circuit switches 2 corresponding to the first to fourth circuits are in the ON state, the front protection plate 6 is held in the "LOCK" position by the fixing pins 14, Grounding operation can not be performed with the grounding switch in a state where manual operation is impossible. That is, the "earthing" prevention interlocks for the circuits 1 to 4 are operated, and vertical movement of the front protection plate 6 located on the side of the elbow connection member 4 is impossible.

4, when the main circuit switch 2 corresponding to the four circuits is changed to the "open" state, the fixing pin 14 of the front surface protection plate 6 connected to the operating link of the operating portion 15, Quot; LOCK "state is automatically released and the front surface protection plate 6 can be manually operated.

For the grounding operation, the four front cover plates 6, which are in the "open" state as shown in FIG. 5, are lifted upwards through the three-stage rail 8 by means of the fixing bars 7, The limit switch 10 connected to the front cover 6 is electrically connected to the control unit 16 so that the limit switch 10 can not be turned on and off by the control unit 16 , The operating pin 15 fixed to the operating unit 15 is in the "LOCK" position, so that the operating portion 15 can not be inserted or opened.

6, the insulation cap of the elbow connection member 4 and the insulation plug 5 are removed. After the detection by the detection sensor type ground elbow 30, the oblique line is checked and then the ground connection And discharges the charge current remaining in the switch 17.

After completion of the grounding operation, as shown in Fig. 7, when vertically descending downward through the three-stage rail 8 using the fixing bars 7 of the four front protection plates 6, The limit switch 10 is operated in the "off" state to give no electric signal to the control unit 16 so that the control unit 16 can be turned on and off and the second limit switch 6 is interlocked with the link The operation pin 15 is set to the "UNLOCK" position and the operation portion 15 can be inserted and opened.

8, when the operation unit 15 is placed in the closed state, the fixed pin 14 associated with the operation unit 15 is moved to the "LOCK" state to operate the front protection plate 6 So that the grounding operation can not be performed in the state in which the main circuit unit 2 is in the closed state.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

1: Insulation housing 2: Main circuit part
4: Elbow connection member 6: Front protection plate
7: Fixed bar 8: 3-way rail
10: Limit switch 14: Fixing pin
15: operating part 16:
17: Actuator 18: Actuator
20: Main circuit switch

Claims (6)

A main circuit switch 20 installed in each operation device 18 for switching the respective switches 17 to the "on / off"state;
A front surface protection plate 6 installed on the front surface of the manipulator 18 and the elbow connection member 4 and being vertically moved so as to come in contact with the manipulator 18 side and the elbow connection member 4 side; And
An operating portion 15 having a fixing pin 14 which is moved to a "lock / unlock" position according to the "on / off" state of the switch 17 to limit the upward / downward movement of the front protection plate 6;
And,
The front protection plate 6 has a structure capable of interlocking with the operation unit 15 and is configured such that when the opening and closing unit 17 is in the "off" state, the fixing pin 14 of the operation unit 15 is moved to the " It is possible to move vertically to the manipulator 18 side,
When the front protection plate 6 is vertically raised and positioned on the manipulator 18 side, the front protection plate gives a signal to the control switch of the limit switch 10 to make it impossible to electrically input the switch, Lock "position by interlocking with the fixing pin 14 of the lock pin 17 so that the switch 17 can not be mechanically turned on,
When the front surface protection plate 6 vertically descends and is located on the side of the elbow connection member 4, the limit switch 14 of the operation unit 15 electrically and mechanically interlocks to the "unlock" position So that the switch 17 can be turned on,
And the fixing pin 14 of the operating portion 15 is moved to the "Lock" position to block the movement of the front surface protection plate 6 when the switch 17 is moved to the " Locking structure.
The method according to claim 1,
Wherein the earthing switch is removed from the insulating housing (1) of the switch (17) and the earthing switch is provided in the elbow connecting member (4) to perform a grounding operation.
3. The method according to claim 1 or 2,
Wherein the ground elbow separated and coupled to the elbow connecting member (4) is provided with an electronic sensor capable of confirming whether or not it is live before the grounding operation.
The method according to claim 1,
The limit switch 10 is brought into the ON / OFF state in conjunction with the upward / downward movement of the front surface protection plate 6 and when the limit switch 10 is in the ON state, So that the operating portion (15) can not be turned on and off.
The method according to claim 1,
The position of the main circuit switch 20 and the position of the elbow connecting member 4 and the insulator 4 are set to be the same when the switch 17 is in the ON state or the OFF state, So that the presence or absence of abnormality of the housing (1) can be visually confirmed.
The method according to claim 1,
The front surface protection plate 6 is moved up and down according to the ON / OFF state of the switch 17 so that when the switch 17 is in the ON state, the elbow connection member 4 and the insulating housing 1 Protects the operator from an accident and prevents grounding of the main circuit switch (20) by manually closing the main circuit switch (20) when the switch (17) is in the "off" state.

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