KR100269401B1 - device for locking in vacumm circuit breaker - Google Patents

Abstract

PURPOSE: A locking apparatus of a vacuum circuit breaker is provided to prevent a vacuum circuit breaker from being re-input if the vacuum circuit breaker has already been input and prevent an accident from being occurred in the vacuum circuit breaker by making a door of a transformer not being opened while the circuit breaker is input. CONSTITUTION: A base(4) is coupled with a lower part of a truck part of a vacuum circuit breaker. A change lever(5) is installed within the truck part and pivotally rotated about a hinge. A button housing(6) is coupled on a bottom surface of inside the truck part and bent on both ends thereof. A push button(9) is inserted into and coupled on the button housing. A push rod(11) is coupled on a rear surface of the push button and reciprocally moved. A locking part(15) is coupled on a side of the button housing. A key locks and releases the locking part. A clamp(101) is coupled on an inside surface of the change lever and moved along the change lever. A control plate(102) is hinge coupled on the inside of the base to be pivotally rotated, contacted to the clamp on one side thereof and rotated according to the motion of the clamp. A wing(106) is bent and integrated on the control plate. A plunger(103) is installed on a side of the locking part to be contacted with the control plate, moved according to the rotation of the control plate, and locks and releases the key inserted into the locking part. A driving contact point(105) is coupled with the button housing and interlocked with the wing to be rotated when the control plate is rotated. A micro switch(104) becomes on/off according to the rotation of the control plate and electrically locks the vacuum circuit breaker.

Description

Device for locking in vacumm circuit breaker

The present invention relates to a vacuum circuit breaker, and more particularly to a locking device of the vacuum circuit breaker.

In general, a vacuum circuit breaker is a circuit and device protection device that quickly disconnects a circuit by arcing a vacuum generated in a vacuum container during opening and closing of a normal load and breaking an accident current.

As shown in FIG. 1, the vacuum circuit breaker includes a cradle 1, a main circuit unit 3, a trolley unit 2, and an auxiliary device, and includes a base 4 below the trolley unit 2. Is coupled, and each of the components are wrapped by a switchboard 10 installed on the outside.

The main circuit section 3 is provided with an energization section, an insulation section, and an arc extinguishing device.

The energizing part is a peripheral element constituting a contact point, the contact point is composed of a movable contact point and a fixed contact point, and the movable contact point is interlocked with the mechanical moving part of the vacuum breaker and is in contact with the fixed contact point when the vacuum breaker is in the 'input' state. At this time, sufficient pressure is applied to the movable contact surface so as not to suppress the current flowing through the circuit by the contact resistance, and when the interruption is made, the movable contact is separated to an appropriate interruption distance at an appropriate speed.

In addition, the insulating part has an insulating function and is made of an epoxy mold or a BMC resin.

In addition, the extinguishing device extinguishes the arc generated at the time of contact opening and closing of the fault current of the vacuum circuit breaker.

The trolley portion 2 refers to a mechanical mechanism for opening and closing the contact of the vacuum circuit breaker, and corresponds to all the operating devices configured on the front side of the vacuum circuit breaker.

In addition, the auxiliary device is an accessory device for operating the vacuum circuit breaker normally, and corresponds to a control device, an interlock device, a drawing device, and a drawing device.

As described above, the vacuum circuit breaker is locked by the locking device when the vacuum circuit breaker is turned on and off, and the locking device is pivotally hinged in the cart 2 as shown in FIG. 2. (5), the button housing (6) coupled to the upper end surface of the base (4) of the cart portion (2) by the fastening force of the bolt, and the bent portion (7) bent at both ends of the button housing (6), respectively. And a push button 9 inserted into and coupled to the bent portion 7, a push rod 11 coupled to a rear surface of the push button 9 and reciprocated by an operation of the push button 9, and A bracket 12 coupled to the top surface of the base 4, a lever 13 hinged to the bracket 12 and pivoted by a push rod 11, and coupled to one side of the lever 13. Tightening by bolts to the input lever 14 for turning the switch ON and OFF and the bent portion 7 of the button housing 6 And a locking portion 15 which is configured for the locking portion 15 with the key 16 to lock and release.

The conventional vacuum circuit breaker configured as described above rotates the change lever 5 installed in the trolley 2 of the vacuum circuit breaker about the hinge up and down of the trolley 2 so as to insert or block the vacuum circuit breaker. The breaker is turned on and off.

In more detail, one end of the change lever 5 installed in the balance unit 2 and rotated about the hinge is rotated downward to be placed in the insertion position, and then the upper end of the base 4 of the balance unit 2. When the push button 9 coupled to one side bent portion 7 of the button housing 6 coupled to the surface is pressed, the push rod 11 coupled to the rear side of the push button 9 moves to the rear side of the vacuum circuit breaker. do.

The push rod 11 is installed across the button housing 6, that is, one end of the push rod 11 is rear of the push button 9 coupled to one bent portion 7 of the button housing 6. The other end of the button penetrates through the other bent portion 7 of the button housing 6 and comes out rearward of the button housing 6.

The lever 13 is hinged to the bracket 12 coupled to the upper end of the base 4 in contact with the end of the push rod 11 by the push rod 11 moved to the rear side of the vacuum circuit breaker. Since the pivot is rotated around the hinge 13, the input lever 14 coupled to one side of the lever 13 is moved upwards to operate the switch coupled to the end of the input lever 14, the switch is turned on (ON) The vacuum circuit breaker is introduced.

When the push button 9 coupled to the button housing 6 is pressed again, the push rod 11 is moved to the front side of the vacuum circuit breaker so that the lever pushed by the push rod 11 is rotated ( 13) is returned to the original position, the lever 13 is returned to the original position by moving the input lever 14 downwards to operate the switch coupled to the end of the input lever 14 to switch off ( OFF), so that the vacuum circuit breaker is blocked.

Here, since the key 16 inserted into the locking portion 15 coupled to one bent portion 7 of the button housing 6 rotates and locks and unlocks the locking portion 15, the vacuum circuit breaker is inserted. Re-injection is prevented from

However, such a conventional vacuum circuit breaker is pressed again when the vacuum circuit breaker is pressed again while the vacuum circuit breaker is put in, that is, when the vacuum circuit breaker does not lock the locking part due to an operator's mistake or unstable operation during operation. Since the contacts of the vacuum circuit breaker are attached and dropped instantaneously, a short circuit accident occurs, and the contacts are not only consumed, but there is a problem that the balance of the vacuum circuit breaker may be damaged and a safety accident may occur in the vacuum circuit breaker.

In addition, there is a problem that a safety accident may occur when the operator opens the door of the transformer and operates the switchboard without locking the key inserted into the locking unit while the vacuum circuit breaker is being introduced.

The present invention has been made to solve the above problems, it is possible to prevent the vacuum circuit breaker is re-inserted when the vacuum circuit breaker is inserted, and to prevent the opening of the door of the transformer when the vacuum circuit breaker may be generated in the vacuum circuit breaker The purpose is to prevent accidents in advance.

In order to achieve the above object, the present invention is a base coupled to the lower portion of the trolley of the vacuum circuit breaker, a change lever installed in the trolley and rotated around the hinge, and both ends coupled to the inner bottom surface of the trolley A bent button housing, a push button inserted into and coupled to the button housing, a push rod coupled to the rear of the push button and reciprocated, a locking portion coupled to one side of the button housing, and inserted into the locking portion, Comprising a key for locking and releasing the locking portion; A clamp coupled to one side of the change lever and a control panel pivotally coupled to the inside of the base to contact the bracket and one side thereof, and installed on one side of the locking part to be in contact with the control panel to insert and remove the key. A locking device for a vacuum circuit breaker is provided, comprising a plunger for locking and releasing it, and a locking means for electrically locking the closing and closing of the vacuum circuit breaker by the pivoting control panel.

1 is a side view showing a general vacuum circuit breaker.

Figure 2 is a perspective view showing a part inside the conventional trolley portion of the vacuum circuit breaker.

Figure 3 is an exploded perspective view showing the present invention locking device of the vacuum circuit breaker.

Figure 4 is a perspective view showing a state in which the locking device of the present invention of the vacuum circuit breaker is coupled.

Figure 5a is a cross-sectional view showing a state in which the present invention the locking device of the vacuum breaker is mechanically locked.

Figure 5b is a cross-sectional view showing a state in which the locking device of the present invention of the vacuum circuit breaker is electrically locked.

Explanation of symbols for main parts of the drawings

101: angle 102: control panel

103: plunger 104: micro switch

105: movable contact 106: wing

107: insulating paper 108: spring

109: hinge

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5b.

Since the vacuum circuit breaker has been mentioned in the conventional configuration, overlapping portions will be omitted, and the same reference numerals will be used for the same structure.

3 and 4 are an exploded perspective view and a coupled perspective view showing the present invention the key lock device of the vacuum circuit breaker, Figure 5a is a cross-sectional view showing a state in which the locking device of the present invention the mechanical lock of the vacuum circuit breaker, Figure 5b is a Sectional drawing which shows the state in which the locking device of this invention is electrically locked.

In the present invention, the clamp 101 is coupled to one side of the change lever 5 installed in the cart 2 and rotated about the hinge, and one end of the clamp 101 is a side of the change lever 5. It is coupled by the fastening force of the bolt, the other end is formed to be inclined at a constant angle.

The control panel 102 is rotatably hinged to the inside of the base 4 of the trolley portion 2 and in contact with the bracket 101, and the control panel 102 is connected to the change lever 5. It is rotated about the hinge 109 while sliding along the other end of the inclined clamp 101 at a predetermined angle to reciprocate up and down by.

The plunger which is in contact with the control panel 102 on one side of the locking portion 15 coupled to the button housing 6 of the trolley portion 2, is inserted into the locking portion 15 and locks and releases the key 16. 103 is provided, the locking means for electrically locking the closing and closing of the vacuum circuit breaker by the control panel 102 is provided.

The locking means has a micro switch 104 is coupled to the inner side of the other end of the base 4, the wing 106 is bent upward on the other end of the control panel 102 is formed, the micro switch 104 The movable contact 105 is formed in contact with the upper end surface of any one of the vanes 106 to be connected to and separated from the stationary contact installed in the micro switch 104.

Insulating paper 107 is wrapped on the outside of the micro switch 104 to prevent damage to the micro switch 104 and to insulate electricity, and connects the control panel 102 and the locking part 15 to a vacuum. When the breaker is placed in the blocked state, the spring 108 is installed so that the control panel 102 returns to its original position.

The key 16 inserted into the locking unit 15 to lock and unlock the locking unit 15 is used together with the door key 16 of the transformer.

The operation of the present invention configured as described above is as follows.

First, when the change lever 5 installed in the trolley portion 2 of the vacuum circuit breaker is lowered as shown by the solid line in FIG. 5A, the vacuum circuit breaker becomes an input state. The vacuum breaker is cut off.

That is, the trolley of the vacuum circuit breaker in the state in which the key 16 is fitted in a solid line to the locking unit 15 hinged to the button housing 6 coupled to the upper surface of the base 2 of the trolley 2 of the vacuum circuit breaker. The unit 2 may be introduced, but in the state where the key 16 is removed from the locking unit 15 (one dashed line), the vacuum circuit breaker is not electrically and mechanically input.

In more detail, when the key 16 is inserted into the locking portion 15 and is in a solid line state as shown in FIG. 5A, the change lever 5 is lowered to the lower portion of the bogie 2, that is, the closing state. Can be put into the vacuum circuit breaker.

At this time, the control panel 102 hinged to the button housing 6 is rotated about the hinge 109 to move upward of the balance unit 2, the control panel 102 is a change lever of the balance unit (2) Since it is in contact with the clamp 101 coupled to (5), it is prevented from being rotated by the clamp 101, and the plunger 103 of the locking portion 15 is fixed by the clamp 101, so that the locking portion The key 16, which is fitted to 15, is not pulled out and the vacuum circuit breaker is introduced.

In addition, when the push button 9 coupled to the button housing 6 is pushed, the push button 9 pushes the push rod 11 while pushing the back of the cart 2 so that the push rod 11 is pushed. By the switch coupled to the end of the push rod 11 is operated by the vacuum circuit breaker is introduced.

As described above, since the key 16 is not removed from the locking unit 15, the key 16 used as the door key of the transformer cannot open the door of the transformer when the vacuum circuit breaker is inserted.

And, because the change lever 5 is moved to the lower side of the balance unit 2 and the control panel 102 is rotated, the micro switch that has been in contact with one of the wings 106 of the wing 106 of the control panel 102. Since the movable contact 105 of 104 is moved to the micro switch 104 side as shown by the solid line in FIG. 5B, the vacuum switch is supplied because power is applied to the micro switch 104 by an input coil (not shown).

Here, when the key 16 is removed from the locking portion 15 and is in a one-dot chain state as shown in FIG. 5A, the change lever 5 is caught by the plunger 103 of the locking portion 15, and the bogie portion 2. It cannot be moved underneath, and thus the vacuum circuit breaker is not input.

In addition, the control panel 102 hinged to the button housing 6 is rotated about the hinge 109 and moved to the lower side of the bogie 2 so that the plunger 103 of the locking portion 15 is locked. Since the push rod 11 is caught by the control panel 102 even when the push button 9 coupled to the button housing 6 is pushed out of the 15, the push button 9 is not pressed and the vacuum breaker The mechanical input is prevented.

In addition, the change lever 5 is moved upward of the balance unit 2 so that the control panel 102 is rotated, and thus the micro switch which has been in contact with one of the blades 106 of the wing 106 of the control panel 102. Since the movable contact 105 of 104 is moved like a dashed-dotted line in FIG. 5B, the power is cut off to the input coil, so that the vacuum circuit breaker is prevented from being electrically input.

As described above, in the state in which the key 16 is inserted into the locking unit 15, the vacuum circuit breaker may be mechanically and electrically injected, but in the state in which the key 16 is removed from the locking unit 15, the vacuum circuit breaker is locked. The vacuum circuit breaker is impossible to be mechanically and electrically injected.

As described above, the present invention is safe when the vacuum circuit breaker is operated because the vacuum circuit breaker is inserted in the state in which the key is inserted into the locking unit installed in the base of the trolley of the vacuum circuit breaker, and the vacuum circuit breaker is not input in the state where the key is removed. Not only can the accident be prevented, but the key inserted into the locking part is used together with the key of the transformer door, so the key does not fall out when the vacuum circuit breaker is turned on. There is an effect that can be prevented.

In addition, since the micro switch is coupled in the button housing coupled to the base top surface of the trolley, the micro circuit breaker is electrically locked in the state where the vacuum breaker is input by the micro switch, and the vacuum breaker is electrically released in the blocked state. There is also an effect that can prevent in advance a safety accident that may occur in the vacuum circuit breaker.

Claims (3)

A base 4 coupled to the lower portion of the trolley of the vacuum circuit breaker, a change lever 5 installed in the trolley portion and pivoted around a hinge, and a button housing coupled to the inner bottom surface of the trolley portion and bent at both ends thereof ( 6), a push button 9 inserted into the button housing, a push rod 11 coupled to a rear surface of the push button and reciprocated, and a locking part 15 coupled to one side of the button housing. In the consisting of a key for locking and unlocking the locking portion, A cramp 101 coupled to one side of the change lever and moving together with the change lever, A control panel 102 hinged to the inner side of the base to be rotatable, the one side of the bracket being in contact with each other, and moving to rotate according to the movement of the bracket; A wing 106 formed integrally with the control panel; A plunger 103 installed on one side of the locking part to contact the control panel and locking and releasing the key inserted into the locking part while moving according to the rotation of the control panel; It is configured to include a micro switch 104 is coupled to the button housing and the movable contact 105 is rotated in conjunction with the blade when the control panel rotates to electrically turn on and off the vacuum circuit breaker as the control panel is rotated. Locking device of the vacuum circuit breaker characterized in that. The method of claim 1, One end of the clamp is coupled to the side of the change lever with a bolt, the other end of the locking device of the vacuum circuit breaker, characterized in that the inclined so as to rotate while sliding the control panel is in contact. The method of claim 1, Locking device of the vacuum circuit breaker characterized in that the control panel is returned to its original position by the spring when the vacuum circuit breaker is placed in the blocking state by installing a spring connecting the control panel and the locking unit.

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