KR19990049064A - Pull-out unit of vacuum breaker - Google Patents

Abstract

The present invention relates to a pull-out unit of the vacuum breaker, withdrawal device is to ensure that the pull-out unit of the vacuum breaker is smoothly drawn in, with a low power and a small number of revolutions in a stable state without flow.

To this end, the present invention is coupled to the inner bottom surface of the balance unit (2) is composed of a worm gear (101) and a worm wheel (108) and a worm wheel (108) of the worm gear (101) The shaft 102 fixedly coupled and rotated according to the rotational force of the worm 107, the lever 103 hinged to both ends of the shaft 102 and rotated by the shaft 102, and the rotated lever ( It is composed of a guide means for guiding the lever 103 so that the trolley portion 2 can be pulled in and out from the switchboard 10 by 103.

Description

Pull-out unit of vacuum breaker

The present invention relates to a vacuum circuit breaker, and more particularly, to a pull-out unit 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 part 3, a bogie part 2, and an auxiliary device, and all of the above components are surrounded by a switchboard installed at an outer side thereof. .

The main circuit portion includes a current interrupting portion, an insulation portion, and an arc extinguishing device. The current blocking portion is a peripheral element constituting a contact, and the contact is composed of a movable contact and a fixed contact, and the movable contact is a mechanical movable part of a vacuum circuit breaker. When the vacuum circuit breaker is in the 'closed' state, the fixed contact point and the movable contact point are in contact with each other, and sufficient pressure is applied to the movable contact point so as not to suppress the current flowing through the circuit by the contact resistance. The movable contact is separated at the proper speed to the proper breaking distance.

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 trolley portion 2 of the vacuum circuit breaker is pulled in and out from the switchboard 10 by the trolley pull in and out device, wherein the trolley pull in, the traveling value is shown in Figure 2, cradle ( 1) a nut assembly 4 fixed to the nut, a nut part 5 having a thread formed on one side of the nut assembly 4, and a nut part 5 rotatably coupled to the nut part 5 to pull in the bogie part 2; It consists of a link 6 which is rotated to release.

One end of the link (6) is formed of a screw thread, the other end is formed in a polygonal shape so that the handle (8) can be coupled, the balance portion (2) to insert and release the cart (2) at a predetermined position The fixing part 7 fixed to the is formed.

In order to draw in and out the cart 2 from the switchboard 10 by means of the draw-in and draw-out of the conventional vacuum circuit breaker configured as described above, the cart unit is guided by the nut assembly 4 fixed to the cradle 1. Since the link 6 fixed by the fixing part 7 is moved to one side of 2), the cart 2 is drawn in and out.

Here, in order to draw in the cart 2, one end of the link 6 fixed by the fixing part 7 to one side of the cart 2 is biased toward one side from the center of the cart 2 to cradle ( Insert into the nut part 5 of the nut assembly 4 fixed to 1).

At this time, one end of the link 6 is formed of a male screw, the nut part 5 is formed of a female screw, and one end of the link 6 is inserted into and coupled to the nut part 5. When the handle 8 is coupled to the other end of the handle 8, the handle 8 is rotated in the forward rotation direction (clockwise), and the link 6 rotates along the nut part 5 to enter the cradle 1 side. In other words, since the fixing portion 7 of the link 6 is fixedly coupled to the balance portion 2, the balance portion 2 is moved to the cradle 1 side.

Since the other end of the link 6 is formed in a polygon by a predetermined length, the handle 8 formed in the same shape as the above shape is fitted to the other end of the link 6, so that the other end of the link 8 is connected to the other end of the link 6. The link 6 is smoothly rotated by the handle 8 when the coupling is easy and the other end of the link 6 and the attachment and detachment of the handle 8 are smoothly rotated while holding the handle 8.

As described above, when the trolley portion 2 is moved toward the cradle 1 by the rotation of the link 6 and the drawing of the trolley portion 2 is completed, the trolley portion 2 is placed on the bushing terminal of the cradle 1. Since the contactor of the coupled main circuit unit 3 is inserted and coupled, power is applied to the vacuum circuit breaker to operate the vacuum circuit breaker.

When the cart 2 is drawn out, that is, when the contactor of the main circuit unit 3 is separated from the bushing terminal of the cradle 1, the handle 8 is coupled to the other end of the link 6, When holding the handle 8 and rotating in the reverse rotation direction (counterclockwise), the link 6, which is fastened to the nut part 5, rotates along the thread and comes out toward the front side of the vacuum circuit breaker. When the withdrawal is completed and the withdrawal of the trolley portion 2 is completed, the contactor of the main circuit portion 3 is separated from the bushing terminal of the cradle 1, so that the supply of power to the vacuum circuit breaker is cut off.

However, since the introduction and the traveling portion of the conventional vacuum circuit breaker are biased from the center to one side when viewed from the front of the vacuum circuit breaker, the balance of the balance is inconsistent when the balance moves, so that the balance is not only flowing but also the movement of the balance is smooth. There was a problem that is not made.

In addition, the introduction of the balance, the handle is coupled to the other end of the long link length, and then the link is rotated to introduce and release the balance, there is a problem that a lot of power and time is required to cause work loss.

The present invention has been made to solve the above-mentioned problems, the object of the vacuum breaker is to draw in and out smoothly with a small force and a low rotation speed in a stable state without flow.

In order to achieve the above object, the present invention is coupled to the inner bottom surface of the balance portion worm gear consisting of a worm and a worm wheel, and a shaft fixedly coupled to the worm wheel of the worm gear and rotated according to the rotational force of the worm, A pull-out and a travel of a vacuum circuit breaker comprising a lever hinged to both ends and pivoted by a shaft, and guide means for guiding the lever so that the cart can be pulled in and out of the switchboard by the pivoted lever. Chi is provided.

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

Figure 2 is a perspective view showing a conventional pull-out portion, the travel value of the vacuum circuit breaker.

Figure 3 is a cross-sectional view showing a state in which the conventional pull-out unit, the extraction device of the vacuum circuit breaker operates.

Figure 4 is a perspective view showing a pull-out, travel value of the present invention of the vacuum circuit breaker.

Figure 5a is a cross-sectional view showing a state in which the trolley portion of the present invention of the vacuum circuit breaker retracted.

Figure 5b is a cross-sectional view showing a state in which the present invention the balance portion of the vacuum circuit breaker pulled out.

Figure 6 is a perspective view of the present invention worm gear of the vacuum circuit breaker.

Explanation of symbols for main parts of the drawings

101: worm gear 102: shaft

103: lever 104: projection

105: guide 106: slotman

107: worm 108: worm wheel

109: hinge

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6.

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.

Figure 4 is a perspective view showing a pull-out, the travel value of the present invention of the vacuum circuit breaker, Figure 5a is a cross-sectional view showing a state of the present invention trolley of the vacuum circuit breaker pulled in, Figure 5b is a state in which the balance of the present invention of the vacuum circuit breaker is drawn out 6 is a perspective view showing the present invention worm gear of the vacuum circuit breaker, the present invention is a worm gear 101 consisting of a worm 107 and a worm wheel 108 on the inner bottom surface of the cart (2) The shaft 102, which is rotated according to the rotational force of the worm 107, is fixedly coupled to the worm wheel 108 of the worm gear 101, and both ends of the shaft 102 are the bogie 2. It is coupled to both sides of.

The levers 103 pivoted by the shafts 102 hinged to both ends of the shaft 102 are respectively provided on both outer peripheral surfaces of the trolley portion 2, and the trolleys are rotated by the levers 103 rotated. Guide means for guiding the lever 103 so that the unit 2 can be drawn in and out from the switchboard 10 is configured.

The guide means may include protrusions 104 hinged to one end of each lever 103, guides 105 respectively provided on both sides of the inner surface of the switchboard 10, and protrusions on the guides 105. It consists of the long hole 106 which guides the moving direction of the 104.

An insertion hole 110 is formed to insert the shaft 102 into the worm wheel 108 of the worm gear 101, and the insertion hole 110 penetrates the insertion hole 110 through the worm wheel 108. A coupling hole 111 is formed to be orthogonal to the hinge hole, and a hinge 109 is installed to fix the shaft 102 to the insertion door worm wheel 108 in the coupling hole 111.

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

First, the worm wheel 108 of the worm gear 101 composed of a worm 107 and a worm wheel 108 installed on the inner bottom surface of the cart 2 to draw in and out the cart 2 of the vacuum circuit breaker. One end of the worm 107 engaged with the outer circumferential edge is rotatably fixed at an appropriate position in the balance unit 2, and the handle 8 is coupled to the other end of the worm 107 formed in a polygon by a predetermined length. Since the handle 8 is rotated in the forward and reverse directions (clockwise and counterclockwise), the cart 2 is moved in and out while moving forward and backward.

Here, when the cart 2 is drawn in, the worm 107 is rotated by rotating the handle 8 coupled to one end of the worm 107 of the worm gear 101 in the reverse rotation direction (counterclockwise direction). Since the worm wheel 108 of the worm gear 101 is rotated to the front side of the vacuum circuit breaker in the drawing by the rotation of the worm 107 in the counterclockwise direction, the hinge 109 is located at the center of the worm wheel 108. The coupled shaft 102 is rotated counterclockwise.

That is, when the shaft is coupled to the worm wheel 108 of the worm gear 101 in more detail, the shaft 102 is inserted into the insertion hole 110 formed in the center of the worm wheel 108 Since the hinge 109 is inserted into the coupling hole 111 perpendicularly penetrating the insertion hole 110 to couple the shaft 102 inserted into the insertion hole 110, the insertion hole 11 is inserted into the insertion hole 11. The shaft 102 is fixedly coupled to the worm wheel 108 so that the shaft 102 rotates according to the rotation of the worm wheel 108.

Guides 105 installed at both ends of the rotating shaft 102, that is, each protrusion 104 of the lever 103 coupled to both outer peripheral surfaces of the trolley portion 2, respectively, on both sides of the inner surface of the switchboard 10. Is moved along the long hole 106, i.e., the projection 104 of the lever 103 guided along the long hole 106 of the guide 105 is located at the top of the long hole 106, If the worm 107 is continuously rotated in the state, the protrusion 104 is guided by the long hole 106 and moved to the lower part of the long hole 106, that is, the lower part of the guide 105, so that the trolley portion 2 is vacuumed. It is moved to the rear side of the breaker and drawn in.

When the drawing-in of the trolley | bogie 2 is completed, since the condenser of the main circuit part 3 installed in the back of the trolley | bogie 2 is inserted in the bushing terminal of the cradle 1, power is supplied to the said vacuum circuit breaker.

In addition, when pulling out the cart 2 to repair and check the vacuum circuit breaker, when the handle 8 coupled to one end of the worm 107 is rotated in the forward rotation direction (clockwise) on the drawing, the worm 107 ) Rotates clockwise and the worm wheel 108 is rotated clockwise by the rotation of the worm 107 (clockwise), so that the shaft 102 coupled to the worm wheel 108 is clockwise. Is rotated.

Each protrusion 104 of the lever 103 coupled to both ends of the rotating shaft 102 is moved along the long hole 106 of the guide 105, that is, guided along the long hole 106 of the guide 105. Since the projection 104 of the lever 103 is located at the upper part of the long hole 106 and then rotates again, it is positioned at the lower part of the long hole 106, that is, the lower part of the guide 105. The cart 2 is moved to the front side of the vacuum circuit breaker and drawn out.

When the withdrawal of the balance unit 2 is completed, the condenser of the main circuit unit 3 coupled to the bushing terminal of the cradle 1 is separated from the bushing terminal, so that the power supplied to the main circuit unit and the balance unit of the vacuum circuit breaker is cut off. do.

As such, when the power to the vacuum circuit breaker is cut off and the repair and inspection of the vacuum circuit breaker is completed, the cart 2 may be retracted to operate the vacuum circuit breaker.

Both ends of the shaft 102 coupled to the worm gear 101 are coupled to both side surfaces of the trolley 2 at any position on the front surface of the trolley 2 at the same time. Lever 103 is coupled to both ends, that is, the outer peripheral surface of the both sides of the balance unit 2, the projections hinged to one end of each lever 103, the guide is provided on both sides of the inner surface of the switchboard 10 Since it is coupled to the long hole 106 of the 105, the projection 104 is moved up and down along the long hole 106 of the guide 105 by the rotational force of the worm gear 101, both sides of the bogie 2 Since the force is transmitted at the same time, the cart 2 is smoothly drawn in and out without left and right flow.

As described above, the present invention is installed on the inside of the trolley portion is coupled to the cradle and the worm gear and the worm gear is coupled to the shaft and both ends of the shaft and then the long holes on both inner surfaces of the balance portion to guide both ends of the lever By installing the formed guide, the lever is rotated in accordance with the rotation of the worm gear, and the force is simultaneously transmitted to both sides of the trolley portion, so that the trolley portion is drawn in and out in a stable state without left and right flow, so that the incoming and outgoing operations of the trolley portion are performed. It has a convenient effect.

In addition, by using the worm gear, the introduction and withdrawal of the trolley portion can be made with low force and the number of rotations, and the trolley portion withdrawal and the traveling value can be made compact.

Claims (3)

A worm gear coupled to the inner bottom surface of the bogie and consisting of a worm and a worm wheel, A shaft fixedly coupled to the worm wheel of the worm gear and rotated according to the rotational force of the worm; Levers hinged to both ends of the shaft and pivoted by the shaft, The pull-out unit of the vacuum circuit breaker, characterized in that the guide means for guiding the lever so that the cart can be drawn in, out of the switchboard by the pivoting lever. The method of claim 1, The guide means includes a protrusion rotatably coupled to one end of each lever, Guides installed on both sides of the inner surface of the switchboard, The draw-in and out apparatus of the vacuum breaker, characterized in that formed in the guide is composed of a long hole for guiding the movement direction of the projection. The method of claim 1, An insertion hole is formed to insert the shaft into the worm wheel of the worm gear, and the coupling hole is formed to be orthogonal to the insertion hole through the insertion hole in the worm wheel, and is inserted into the coupling hole to fix the shaft to the worm wheel Pull-out unit of the vacuum circuit breaker, characterized in that the installation device.