KR101110481B1 - Damping mechanism for solid insulated load breaking switchgear - Google Patents

Abstract

PURPOSE: A buffer device of a solid insulation load switch is provided to rotate a spring support stand with a support frame as a rotation supporting point, thereby acquiring rotatable effects of a buffer spring. CONSTITUTION: A second lever(310) is supported in a power transmission shaft coaxially with a first lever. The second lever rotates together according to the rotation of the power transmission shaft. A spring supporting device(330,350,360c) includes one end part connected to a rotary shaft which is different from the power transmission shaft and the other end part connected to the second lever with a connection pin. The spring supporting device comprises a spring support stand which is able to rotate in an opposite direction with respect to the rotation of the second lever. A buffer spring(340) supplies elastic force to the second lever in order to accelerate the rotation in an input direction.

Description

Damping Mechanism for Solid-Insulation Load Breaker {DAMPING MECHANISM FOR SOLID INSULATED LOAD BREAKING SWITCHGEAR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid insulated load breaker switchgear, and more particularly to an open driving force by a torsion spring transmitted to a switching actuator mechanism during an open operation in a solid insulated load breaker switchgear. It relates to a damping mechanism (damping mechanism) for reducing the shock received by the opening and closing operation mechanism by buffering the elastic force of the open spring and the contact spring.

Solid-state insulated load switchgear is a power switchgear that can open or close the power circuit between the power supply side and the load side of the power for power distribution and branch circuit construction in substations or large-scale customers in the power system. In contrast to the gas insulation method in which the separate contact mechanism is accommodated in the insulated gas encapsulation container, there is a difference in the insulation configuration insulating the phases by embedding the alternating current contact mechanism in a solid insulating material such as epoxy. Such a load switch has recently installed a communication control function to control the operation of opening or closing at a remote location, and the administrator can directly open or close the load switch in order to make the operation and management more convenient. .

An example of such a solid insulation load switch may refer to Korea Patent Registration No. 10-0832331 (name of the invention: power transmission device of a high voltage load switch) registered by the applicant of the present invention.

In the solid-state insulated load switch according to the prior art as described above, the opening and closing driving force of the switching actuator mechanism for providing the opening and closing driving force of the power circuit is obtained from the elastic energy that is strong and prevailing, The opening and closing driving force of the torsion spring is a problem because the opening spring and the contact spring buffers during closing operation of the power circuit. However, in the opening operation of the power circuit, the elastic force of the opening spring and the contact spring is added to the strong elastic force of the torsion spring included in the opening and closing operation mechanism, and is imposed back to the opening and closing operation mechanism side through the power transmission shaft. There was a problem that the opening and closing operation mechanism is deformed or broken by a sudden impact.

Accordingly, the present invention solves the problems of the prior art, the object of the present invention is to reduce the impact force that can be amplified and imposed on the opening and closing operation mechanism side through the power transmission shaft during the opening operation of the power circuit to It is to provide a buffer mechanism of the solid insulated load switchgear that can prevent deformation or breakage of the opening and closing operation mechanism.

The object of the present invention is a switching actuator mechanism for providing an opening and closing driving force, a power transmission shaft for transmitting power by being connected to the output end of the opening and closing operation mechanism to rotate, and the shaft is supported on the power transmission shaft A connecting rod connected to the first lever and the first lever rotatable according to the rotation of the power transmission shaft, and a connecting rod movable up and down according to the rotation of the first lever, and connected to the connecting rod. A cam shaft rotatable in accordance with the elevating of the connecting rod, a cam rotatable by the camshaft, a main circuit switch provided for opening and closing the main power circuit and having a movable contactor and a fixed contactor, and grounding. A ground circuit switch provided for opening and closing of the circuit and having a movable contactor and a fixed contactor, and provided to be in contact with the surface of the cam to rotate the cam. A first operation unit supporting a first link unit and a second link unit for opening and closing the main circuit switch and the ground circuit switch; And an open spring connected between a second operation shaft, the first operation shaft and the second operation shaft to impart an elastic force to the first operation shaft during the opening operation of the main circuit switch, and the main circuit switch and the ground circuit. A solid-state insulated load switch comprising a contact spring for providing an elastic force to a movable contactor of a switch to maintain a contact pressure with a fixed contactor.

A second lever coaxially supported with the first lever on the power transmission shaft and rotatable together in accordance with the rotation of the power transmission shaft;

A spring support mechanism having a rotation axis different from the second lever and connected to the second lever, the spring supporting mechanism being rotatable in a direction opposite to the rotation direction of the second lever in accordance with the rotation of the second lever; And

And a buffer spring which is supported by the spring support mechanism and buffers the elastic force of the open spring transmitted from the power transmission shaft to the spring support mechanism through the second lever. It can be achieved by providing a shock absorbing mechanism of the switchgear.

Since the shock absorbing mechanism of the solid insulated load switch according to the present invention includes a shock absorbing spring connected to the power transmission shaft, the opening spring and the contact spring are connected to the elastic force of the torsion spring during the opening and closing operation of the solid insulated load switch. Since the elastic force is added and the force of the elastic force fed back to the opening and closing operation mechanism side can be buffered by the shock absorbing spring, the effect of preventing deformation or damage of the opening and closing operation mechanism can be obtained, and the solid insulation load switch In the closing operation, the shock absorbing spring may act to accelerate the power transmission shaft, and thus the closing speed may be accelerated, and thus the rapid closing operation may be performed.

In the shock absorbing mechanism of the solid insulated load switch according to the present invention, the spring support mechanism has a head connected to the second lever and movable up and down, having a diameter smaller than that of the head and extending from the head and rotatable. A spring support having a body portion having an axially supported end portion; And a supporting base for providing a rotational support point to allow the spring support to be rotatable, so that the shock spring can be rotated together with the rotatable spring support using the support base as the rotational support point.

In the shock absorbing mechanism of the solid insulation load switch according to the present invention, the spring support includes a head for supporting one end of the shock absorbing spring, the other end of the shock absorbing spring is supported by a spring seat member fitted to the spring support, By supporting the seat member axially to provide a rotational support point to the body portion of the spring support and including a support shaft fixed to the support base, the shock absorbing spring is supported by the spring seat member fitted to the head of the spring support and the spring support. By being able to rotate and the spring seat member is supported by the support shaft portion, it is possible to obtain the effect that the shock absorbing spring can be rotated together with the support shaft portion as the point of the spring support.

A buffer mechanism of a solid insulated load switch according to the present invention, wherein the support base includes: a horizontal support plate portion; And a pair of vertical support plates which are formed upright from an upper surface of the horizontal support plate portion, and are formed to be spaced apart from each other at a predetermined interval, wherein the support shaft portion is separated from each of the pair of vertical support plate portions. It has a support protrusion formed to protrude into the gap, the spring sheet member has a pair of support grooves to allow the support protrusion to be inserted, by a pair of support protrusions formed between a pair of vertical support plate The spring sheet member is rotatably supported, and thus, a spring support into which the spring sheet member is fitted can also be rotatably supported.

1 is a perspective view of the solid insulated load switch including the buffer mechanism of the solid insulated load switch according to the present invention as viewed obliquely from above,
FIG. 2 is a longitudinal sectional view of the solid insulation load switch of FIG. 1;
3 is an enlarged view of a main part of FIG. 2;
Figure 4 is a side view showing a part of the configuration of the buffer mechanism and the solid insulation load switch of the solid insulation load switch according to the present invention,
5 is a plan view of a buffer mechanism of a solid insulation load switch according to the present invention;
Figure 6 is a side view showing the connection configuration of the shock absorbing mechanism and the connecting rod and the power transmission shaft of the solid-state insulated load switch according to the present invention.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 is a perspective view of the solid insulated load switch including the shock absorbing mechanism of the solid insulated load switch according to the present invention as viewed obliquely from above, FIG. 2 is a longitudinal cross-sectional view of the solid insulated load switch of FIG. 1, and FIG. 4 is a side view illustrating a partial configuration of a buffer mechanism and a solid insulation load switch according to the present invention, and FIG. 5 is a buffer mechanism of the solid insulation load switch according to the present invention. 6 is a side view illustrating a connection configuration of only the buffer mechanism, the connecting rod, and the power transmission shaft of the solid state insulating load switch according to the present invention.

Prior to explaining the shock absorbing mechanism of the solid insulated load switch according to the present invention will be described the configuration and operation of the solid insulating load switch is applicable to the shock absorbing mechanism according to the present invention.

1 and 2, the solid-state insulated load switch includes a main circuit switch 110 for opening and closing a main circuit, and a grounding circuit switch 120 for opening and closing a ground circuit. ), The main circuit switch 110 and the operation drive force from the operation mechanism 130 and the operation mechanism 130 for operating the main circuit switch 110 and the ground circuit switch 120 to the input, interrupt and ground opening and closing position, respectively. And a power transmission device 150 for transmitting to the ground circuit switch 120.

In FIG. 1, the lower plate 141, the side plate 145, the supporting rod 147 and the upper plate 143 are included in the supporting frame 140 shown in FIG. Component.

The lower plate 141 is a support plate formed by bending separately or integrally from the side plate 145 and is horizontally installed to support the power transmission device 150.

The side plate (or so-called front plate) 145 is a support plate for fixing and supporting the operation mechanism 130 on the side (front side) of the high voltage load switch.

The support rod 147 is a rod supporting the upper plate 143 to have a predetermined interval between the upper plate 143 and the lower plate 141, and four may be provided to correspond to the four corners of the upper plate 143, and the lower portion It is provided with a head portion and extends through the lower plate 141, the upper end is formed with an inner hole portion formed with a screw surface (bolt) is installed to penetrate through the four corner portions of the upper plate 143 By screwing the screw surface and the corresponding durable portion can be fixed to the support rod 147 to support the four corners of the upper plate 143, respectively.

The top plate 143 rotatably supports the plurality of drive shafts 171, 181, and 191 included in the power transmission device 150 through support brackets (not shown) fixedly installed on the top plate 143.

As shown in FIG. 2, the main circuit switch 110 includes a movable contact 112 and a fixed contact 114, and at least three main circuit switches 110 are provided to correspond to three-phase alternating current. Can be. The movable contact 112 and the fixed contact 114 are buried so that the periphery thereof is surrounded by a solid insulating material such as epoxy to electrically insulate the movable contact from the other phase and the fixed contact and the ground circuit switch 120. The main circuit switch 110 has a closed position in which the movable contact 112 contacts the fixed contact point 114 so that the main circuit can be energized, and the movable contact 112 is separated from the fixed contact point 114 to provide the main circuit. It has two operating positions, the open position, through which the current flow is interrupted.

As shown in FIG. 2, the ground circuit switch 120 includes a movable contact 122 and a fixed contact 124, and at least three ground circuit switches 120 are provided to correspond to three-phase alternating current. Can be. The movable contact 122 and the fixed contact 124 are surrounded by a solid insulating material, such as epoxy, around the movable contact 122 and the fixed contact 124, and electrically connected to the movable contact and the fixed contact of the other phase and the main circuit switch 110. Buried to be insulated. The ground circuit switch 120 has a ground position at which the movable contact 122 contacts the fixed contact 124 so that the circuit can be grounded, and the movable contact 122 is separated from the fixed contact 124 so that the ground of the circuit is established. It has two operating positions of the open position which are suspended.

The opening and closing operation mechanism 130 rotates the elastic energy by electrically charging the torsion spring and discharging the elastic energy stored in the torsion spring by electric motor or by manually connecting the operation handle. By outputting as a driving force, it can be configured with an actuator (actuator) for rotating the power transmission shaft 151 to be described later. More detailed configuration and operation of the opening and closing operation mechanism 130 is, for example, the Republic of Korea Patent Registration No. 0186357 (the name of the invention: automatic contact opening and closing operation mechanism of the 3-position multi-circuit switch) or Korean Patent Registration See also the publication of 0566435 (name of the invention: three-position load breaker with net-slip mechanism).

The power transmission device 150 is disposed between the main circuit switch 110 and the ground circuit switch 120 and the open / close operation mechanism 130 to transmit the driving force of the open / close operation mechanism 130 to the main circuit switch 110 and the ground circuit. As a power transmission device to be transmitted to the switch 120, a power transmission shaft 151, a cam shaft (171), the first operating shaft 181, the second operating shaft 191, the main circuit contact spring (221a) ), A ground circuit contact spring unit 221b, a main circuit link unit 251, a ground circuit link unit 261, and an open spring 195, as shown in FIG. 1 or 2. It is comprised including the power transmission mechanisms 175b and 253a.

2, the power transmission shaft 151 has one end (left end in FIG. 2) connected to the opening and closing operation mechanism 130 to receive the output of the rotational driving force of the opening and closing operation mechanism 130. It is a pivotable axis. On the other end of the power transmission shaft 151 (right end in FIG. 2), a first lever (see 151a in FIG. 5) is contracted and installed, and the first lever 151a is connected to the connecting rod of FIG. The connecting rod 161 is connected to the lower end of the connecting rod 161 by connecting means such as a connecting pin. The connecting rod 161 is a rod-shaped member which is movable up and down in accordance with the power transmission of the first lever 151a according to the rotation of the power transmission shaft 151, and the upper end thereof is a rod connecting lever ( rod connecting lever (not shown). For more detailed drawings and descriptions of the connecting rod 161 and the connection configuration thereof, reference may be made to FIG. 7 and a description of the configuration of Korean Patent Registration No. 0832331 introduced in the background art.

As shown in FIG. 2, the camshaft 171 is disposed above the main circuit switch 110 and the ground circuit switch 120, and the power transmission shaft 151 via the connecting rod 161 as described above. Drive is connected to the power transmission shaft 151 and is rotatable. As shown in FIG. 2, the camshaft 171 may be formed of a metal rod having a hexagonal cross-sectional shape, and as shown in FIG. 1, the three main cams may correspond to three phases. 175a and a connecting rod (see reference numeral 161 of FIG. 1) are stored and supported. As shown in FIG. 3, the main cam 175a has a large curvature radius and a small curvature radius.

The first operation shaft 181 opens and closes the main circuit switch 110 provided for each phase of three-phase alternating current. For opening and closing driving of the main circuit switch 110, as shown in FIG. 2, the first operation shaft 181 is connected to the main circuit switch through a main circuit link part 251 and a main circuit contact spring 221a. It is connected to the movable contact portion 112 of the (110).

The second operation shaft 191 opens and closes the ground circuit switch 120 provided for each phase of the three-phase alternating current. For opening and closing driving of the ground circuit switch 120, as shown in FIG. 2, the second operation shaft 191 is connected to the ground circuit through the ground circuit link unit 261 and the ground circuit contact spring unit 221b. It is connected to the movable contact portion 122 of the switch 120.

The cam shaft 171, the first operating shaft 181 and the second operating shaft 191 are a plurality of support brackets (unsigned) fixed on the upper plate 43, as can see FIG. Are respectively rotatably supported.

As shown in FIG. 2, the main circuit contact spring 221a has an upper portion connected to the first operation shaft 181 through the main circuit link portion 251 and a lower portion of the movable contact portion of the main circuit switch 110. It is connected to (112), and transmits the opening and closing driving force from the first operation shaft 181 transmitted through the main circuit link unit 251 to the movable contact portion 112 of the main circuit switch 110. The main circuit contact spring 221a includes a rod (unsigned) connected to the movable contact portion 112 of the main circuit switch 110 and a contact spring (unsigned) provided outside the rod. It may be configured, the rod is connected to the lower end of the upper rod portion (unsigned) and the upper rod portion for supporting the pressure spring and the other end of the movable contact portion 112 of the main circuit switch 110 It may be configured to include a lower rod portion (unsigned) connected to). The detailed configuration of the main circuit contact spring 221a may refer to FIGS. 10 and 11 and a description of the configuration of the publication of Korean Patent Registration No. 0832331 introduced in the background art.

As shown in FIG. 2, the ground circuit contact spring unit 221b is connected to the second operating shaft 191 through the ground circuit link unit 261 and the lower portion is a movable contact of the ground circuit switch 120. It is connected to the unit 122, and transmits the opening and closing driving force from the second operation shaft 191 transmitted through the ground circuit link unit 261 to the movable contact portion 122 of the ground circuit switch 120. The ground circuit contact spring unit 221b includes a rod (unsigned) connected to the movable contact portion 122 of the ground circuit switch 120 and a contact spring (unsigned) installed outside the rod. It may be configured to include, wherein the rod is connected to the lower end of the upper rod portion (unsigned) and the upper rod portion for supporting the contact spring and the other end of the movable contact portion of the ground circuit switch 120 ( It may be configured to include a lower rod portion (unsigned) connected to the 122. A detailed configuration of such a ground circuit contact spring unit 221b may be referred to FIGS. 10 and 11 and a description of the configuration of the publication of Korean Patent Registration No. 0832331.

The main circuit link unit 251 has a pair of links respectively connected to the first operation shaft 181 and the main circuit contact spring 221a so that the connection portion contacts one side of the main cam 175a. In more detail, the main circuit link unit 251 may include a first link 253, a second link 255, and a roller 257 as shown in FIG. 2. Here, the first link 253 may be provided in three pairs, one pair each to correspond to the three phase main circuit switch 110 corresponding to the three phases, each pair of the first link 253 is the first operation shaft 181 is connected. The second link 255 may also be provided with three pairs corresponding to the three pairs of the first link 253, and each pair of second links 255 may have an upper end connected to the first link 253 by a connection pin. The lower end may be connected to the main circuit contact spring (221a). The roller 257 is rotatably installed around the connecting pin corresponding to the connection portion between the first link 253 and the second link 255 so as to make rolling contact with the main cam 175a.

The ground circuit link unit 261 has a pair of links connected to the second operation shaft and the ground circuit contact spring unit, respectively, and a connection portion thereof is in contact with the other side of the cam. In more detail, the ground circuit link unit 261 includes a third link 263, a fourth link 265, and a roller 267, as can be seen with reference to FIGS. 1 and 2. Here, the third link 263 may be provided in three pairs, one pair for each phase to correspond to the three phase-specific ground circuit switch 120 corresponding to the three phases, each pair of the third link 263 is a second operation Is coupled to the shaft 191. Three pairs of fourth links 265 may also be provided to correspond to three pairs of third links 263. Each pair of fourth links 265 may have an upper end connected to the third link 263 by a connection pin. The lower end may be connected to the ground circuit contact spring unit 221b. A roller 267 is rotatably installed around the connecting pin corresponding to the connection portion between the third link 263 and the fourth link 265 so as to allow rolling contact with the main cam 175a.

As shown in FIG. 1, the opening spring 195 is connected between the first operating shaft 181 and the second operating shaft 191 so as to open the first operating shaft (1) during the opening operation of the main circuit switch 110. Impose an elastic force on 181 to rotate. In more detail, as shown in FIG. 1, the open spring 195 may be configured as a pair, and the pair of first spring support levers 183 and the first spring supported by the first operating shaft 181 may be formed. Both ends of each of the open springs 195 are installed to be supported by the pair of second spring support levers 193 stored in the two operation shafts 191. Each of the first spring support lever 183 and the second spring support lever 193 has a spring support groove for supporting both ends of the pair of open springs 195. Therefore, in FIG. 2, when the first operating shaft 181 rotates counterclockwise or the second operating shaft 191 rotates clockwise, the open spring 195 is stretched to condense elastic energy and open spring. As the first elastic energy is charged by 195, the first operating shaft 181 or the second operating shaft 191 may be rotated. The rotation driving force of the first operation shaft 181 or the second operation shaft 191 may act as an open position to separate the movable contact portion of the main circuit switch 110 or the ground circuit switch 120 from the fixed contact portion.

1 and 2, the main circuit power transmission mechanisms 175b and 253a may operate in the open position rotational power of the power transmission shaft 151 when the main circuit switch 110 is operated in the open position. Transfer to the main circuit switch 110 to operate in the open position. To this end, the main circuit open power transmission mechanisms 175b and 253a include an open cam 175b and an open link portion 253a as can be seen in FIG. 1.

The power transmission device of the solid insulated load switchgear operates the ground position rotational power of the power transmission shaft 151 to the ground circuit switch 120 when the ground circuit switch 120 of FIG. 2 operates in the ground position. It may further include a ground circuit power transmission mechanism for transmitting (175c, 263a, 267a).

The ground circuit power transmission mechanisms 175c, 263a, and 267a include a ground circuit auxiliary drive cam 175c and an auxiliary ground circuit link portion 263a, as can be seen in FIG.

The ground circuit power transmission mechanisms 175c, 263a, and 267a may further include a roller 267a, as shown in FIG. 3, and may make a rolling contact with the auxiliary drive cam 175c. The roller 267a is rotatably installed at an upper end of the auxiliary ground circuit link unit 263a about a rotation axis such as a pin (not shown).

The ground circuit auxiliary drive cam 175c is installed coaxially with the main cam 175a on the cam shaft 171, but is installed differently from the main cam 175a, and is rotatable in accordance with the rotation of the cam shaft 171.

As shown in FIG. 1 or FIG. 2, the auxiliary ground circuit link unit 263a is coaxially installed with the ground circuit link unit 261 on the second operation shaft 191, and the ground circuit link unit 261 is connected to the ground circuit link unit 261. The installation angle is differently installed, and the driving force is transmitted to the second operation shaft 191 in contact with the rotating circuit auxiliary driving cam 175c.

On the other hand, the operation of the power transmission device of the high voltage load switch according to the present invention configured as described above with reference to Figures 1 to 3 as follows.

First, the main circuit opening operation of the power transmission device of the high voltage load switch according to the present invention will be described.

When the opening and closing operation mechanism 130 releases the rotational driving force to the main circuit interruption position by electric or manual operation, the power transmission shaft 151 is rotated counterclockwise by the opening and closing operation mechanism 130, and the power transmission shaft ( The connecting rod 161 connected to the 151 through a first lever (see reference numeral 151a in FIG. 5) moves downward and the cam shaft 171 connected to the connecting rod 161 by a connecting lever (not shown) It rotates counterclockwise to the position shown in FIG. The main circuit link unit 251 and the first operation shaft 181 are formed by the elastic spring energy of the open spring 195 when the roller 257 contacts a portion having a small radius of curvature from a portion having a large radius of curvature. As it discharging, it rapidly rotates clockwise to the initial (neutral) position shown in FIG. 2 by the corresponding elastic energy, whereby the roller 257 simultaneously moves to the left and upper sides as shown in FIG. Is moved. Accordingly, the first operation shaft 181 rotates clockwise by the prevailing elastic energy of the corresponding open spring 195 and the lower end of the second link 255 rotates clockwise and moves upward. Accordingly, the circuit contact spring unit 221a is pulled upward. The rod (unsigned) of the main circuit contact spring 221a that is pulled upward moves upward and the movable contact 112 of the main circuit switch 110 moves upward to be quickly separated from the fixed contact point 114. . At this time, the counterclock in FIG. 1 is provided by an open driving force transmitted from the power transmission shaft 151 to the cam shaft 171 through the connecting rod 161, that is, through the connecting rod 161 and the connecting lever 173 moving downward. As the cam shaft 171 which is rotationally driven in the direction rotates, the opening cam 175b rotates in the counterclockwise direction in FIG. One operation shaft 181 is rotated in a clockwise direction (opening direction of the main circuit).

Thus, the operation of breaking the main circuit (opening, so-called TRIP or OFF position) is achieved and the power side and the load side of the main circuit are electrically disconnected.

Next, the main circuit closing operation will be described.

When the opening and closing operation mechanism 130 outputs the rotation driving force to the main circuit input position by electric or manual operation, the power transmission shaft 151 is in the same direction as the central axis which is the output shaft of the opening and closing operation mechanism 130. In FIG. 1 or FIG. 2, rotation is performed clockwise. Thereby, the connecting rod 161 connected by the power transmission shaft 151 and the connecting lever moves upward, and the cam shaft 171 connected to the connecting rod 161 by the connecting lever (not shown) is shown in FIG. Rotate clockwise from the closed state. At this time, the roller 257 of the main circuit link portion 251 which is in contact with the portion of the main cam 175a that has a small radius of curvature is in contact with a portion having a radius of curvature greater than the second radius of curvature 175a-2. It is pressurized, and the roller 257 is moved to the right side and the bottom side simultaneously in FIG. 1, when the cam shaft 171 rotates in the clockwise direction, the open cam 175b does not contact the roller 257a stored in the first operation shaft 181. Interference by 175b does not occur. Accordingly, the first operation shaft 181 rotates in the counterclockwise direction, and the lower end of the second link 255 rotates in the clockwise direction and moves downward to pressurize the main circuit contact spring 221a downward. Done. The rod (unsigned) of the main circuit contact spring 221a pushed downward is moved downward and the movable contact 112 of the main circuit switch 110 is moved downward to contact the fixed contact 114. Therefore, the main circuit closing (closed, so-called ON position) operation is achieved, and the power supply side and the load side of the main circuit are electrically connected. In this process, as the first operating shaft 181 rotates in the counterclockwise direction, the first spring support lever 183 also rotates in the counterclockwise direction, so that the open spring 195 is tensioned to make the elastic energy condensed. do.

Next, the grounding and grounding operation of the power train of the high voltage load switchgear will be described.

In the neutral position of the main cam 175 as shown in FIG. 2, the central axis of the opening and closing operation mechanism 130 is rotated counterclockwise by electric operation by a ground input signal or the like, or by manual operation by a user's handle operation. The power transmission shaft 151 also rotates counterclockwise. Accordingly, the connecting rod 161 connected by the power transmission shaft 151 and the connecting lever moves downward, and the cam shaft 171 connected to the connecting rod 161 by the connecting lever (not shown) is shown in FIG. 2. Rotate counterclockwise from the state shown. Therefore, the roller 267 of the ground circuit link portion 261, which comes into contact with the large radius of curvature from the position where it is in contact with the small radius of curvature of the main cam 175, is pressed by the main cam 175 to the outside and the lower side. Simultaneously moving, the second operation shaft 191 rotates clockwise. Accordingly, the rod of the ground circuit contact spring unit 221b is moved downward, and the movable contact portion 122 of the ground circuit switch 120 is in contact with the fixed contact portion 124. Accordingly, the grounding circuit is grounded in the state as shown in FIG. 2, which is cut off in the circuit, so that all of the remaining charging current can be discharged to the ground, thus performing the work of branching, maintenance, etc. using a solid insulated load switch. The worker can be protected from electric shock. At this time, the open spring 195 is tensioned by the rotation of the second operation shaft 191 to accumulate elastic force.

On the other hand, when the power transmission shaft 151 is rotated in the clockwise direction by the opening and closing operation mechanism 130 in this state, the cam shaft 171 is rotated in the clockwise direction. Accordingly, as the main cam 175 rotates in the clockwise direction and the roller 267 contacts the small radius portion from the large radius portion of the main cam 175, the first cam 175 is first driven by the elastic force of the open spring 195. The two operating shafts 191 quickly rotate counterclockwise and the rod 230 is quickly moved upward. At this time, by the ground interruption driving force transmitted from the power transmission shaft 151 to the camshaft 171 through the connecting rod 161, that is, rotationally driven clockwise through the connecting rod 161 and the connecting lever 173 moving upward. As the cam shaft 171 rotates, the curvature radius of the ground circuit auxiliary drive cam 175c rotates clockwise in FIG. 1 while the curvature radius of the ground circuit auxiliary drive cam 175c presses on the roller 267a. The two operation shafts 191 are rotated in the counterclockwise direction (opening direction of the ground circuit, also known as ground interruption direction).

As a result, the movable contact portion 122 of the ground circuit switch 120 is quickly disconnected from the fixed contact portion 124 so that grounding of the ground circuit is stopped.

The configuration and operation of the shock absorbing mechanism according to the preferred embodiment of the present invention which can be installed and used in the solid insulation load switch in the solid insulation load switch configured and operated as described above will be described with reference to FIGS. 4 to 6. do.

As shown, the shock absorbing mechanism according to a preferred embodiment of the present invention includes a second lever 310, a spring support mechanism (330, 350, 360, 360c) and the shock absorbing spring 340 is divided largely.

The second lever 310 is axially supported on the power transmission shaft 151 with the first lever 151a and is rotatable together in accordance with the rotation of the power transmission shaft 151.

The spring support mechanisms 330, 350, 360, and 360c include a spring support 330, and the spring support 330 is a rotation axis other than the power transmission shaft 151 which is the rotation axis of the second lever 310. It has one end connected to the support protrusion shown by 360c of FIG. 5, and the other end connected to the 2nd lever 310 by the connecting pin 320. As shown in FIG. The spring support 330 is rotatable in a direction opposite to the rotational direction of the second lever 310 in accordance with the rotation of the second lever 310. That is, the spring support 330 and the second lever 310 have different rotation shafts and are connected to each other by the connecting pins 320, respectively, so that they rotate in opposite directions.

In order to allow play of the connection pin 320, the second lever 310 has a connection pin hole 310a configured in a long hole to allow penetration of the connection pin 320. Accordingly, the spring support 330 is movable within the range of the connecting pin hole 310a formed by the long hole, the spring seat member 350 to be described later is supported by the supporting base 360 Since the position is fixed by the protrusion 360c, the shock absorbing spring 340 may be compressed or extended.

The spring support 330 is connected to the second lever 310 and the head 330a, which can be elevated according to rotation, and has a diameter smaller than the head 330a, and extends from the head 330a and is pivotable. It has a body portion 330b having an end supported.

The head 330a of the spring support 330 is connected to the second lever 310 by the connecting pin 320 and supports one end of the shock absorbing spring 340.

The body 330b of the spring support 330 has a diameter smaller than the head 330a and extends from the head 330a and extends through the shock absorbing spring 340.

The spring support mechanisms 330, 350, 360, 360c include a support base 360 which provides a rotational support point to pivot the spring support 330.

The support base 360 includes a horizontal support plate part 360a and a pair of vertical support plate parts 360b.

The pair of vertical support plate portions 360b are formed upright from the top surface of the horizontal support plate portion 360a, and are formed to be spaced apart from each other at predetermined intervals.

The buffer mechanism of the solid insulated load switch according to the preferred embodiment of the present invention preferably includes a spring seat member 350 that is fitted to the spring support 330 and supports the other end of the shock absorbing spring 340. More to make. Here, the spring seat member 350 is fitted to the spring support 330 is formed on the screw surface formed on the body portion 330b of the spring support 330 and the inner circumferential surface of the spring seat member 350 according to a preferred embodiment. It can be made by screwing the screw surface.

In the shock absorbing mechanism of the solid insulation load switch according to the preferred embodiment of the present invention, the spring support mechanisms 330, 350, 360, and 360c support the spring sheet member 350 to axially support the body of the spring support 330. It may be configured to further include a support shaft portion fixed to the support base 360 to provide a rotation support point to (330b).

According to a preferred embodiment of the present invention, as shown in FIG. 5, the support shaft portion rotatably supporting the spring support 330 protrudes into the gaps from each of the pair of vertical support plate portions 360b. It may be composed of a support protrusion 360c is formed.

As can be seen in Figure 5, according to a preferred embodiment of the present invention the spring sheet member 350 has a pair of support grooves (350a) to allow the support protrusion (360c) to be inserted.

The shock absorbing spring 340 is supported by the spring support mechanism (330, 350, 360, 360c). In the opening operation of the solid insulation load switch, the shock absorbing spring 340 is the elastic force and the contact spring of the open spring (see reference numeral 195 of FIG. 2) added to the elastic force of the torsion spring (not shown) of the opening and closing operation mechanism 130. (That is, the elastic force of the main circuit contact pressure spring 221a or the ground circuit contact spring 221b) is buffered. In other words, the elastic force of the torsion spring of the opening and closing operation mechanism 130 transmitted by the power transmission shaft 151 and the spring support mechanism 330, 350 from the power transmission shaft 151 through the second lever 310. The elastic force of the open spring (refer to reference numeral 195 of FIG. 2) and the contact force (that is, the contact force spring 221a or the ground circuit contact spring 221b) of the open spring (360, 360c) transmitted to the 340 is to buffer.

In addition, during the closing (closing) operation of the solid insulation load switch, the shock absorbing spring 340 imparts an elastic force to the second lever 310 in the closing operation direction (clockwise in FIG. 4) after passing through a dead point. It serves to further accelerate the rotation of the operation direction of the power transmission shaft 151 for supporting the second lever 310 and the second lever 310.

The operation of the shock absorbing mechanism of the solid insulation load switch according to the present invention configured as described above will be described.

First, the operation of the buffer mechanism of the solid insulated load switch according to the preferred embodiment of the present invention during the opening operation of the solid insulated load switch.

When the opening and closing operation mechanism 130 releases the rotational driving force to the main circuit interruption position by electric or manual operation, the power transmission shaft 151 is rotated counterclockwise by the opening and closing operation mechanism 130, and the power transmission shaft ( The connecting rod 161 connected to the 151 via the first lever (see reference numeral 151a in FIG. 5) moves downward. At this time, the cam shaft 171 connected to the connecting rod 161 by the connecting lever (not shown) is rotated counterclockwise with a strong force by the large elastic energy of the torsion spring of the opening and closing operation mechanism 130 and FIG. To the location shown in. The main circuit link unit 251 and the first operation shaft 181 are formed by the elastic spring energy of the open spring 195 when the roller 257 contacts a portion having a small radius of curvature from a portion having a large radius of curvature. Discharging In addition, the main contact pressure spring 221a is compressed as the movable contact portion 112 is lifted apart from the corresponding fixed contact point 114, and the compressed main circuit contact spring 221a receives the elastic force as the elastic restoring force. The cam shaft 171 is imposed through the link portion 251.

Therefore, in addition to the counterclockwise rotational force of the power transmission shaft 151 by the opening and closing operation mechanism 130, the prevailing elastic energy (elastic force) of the open spring 195 and the elastic force of the main circuit contact spring 221a The camshaft 171 and the connecting rod 161 act as a force to rotate the power transmission shaft 151 counterclockwise in FIG.

At this time, the force that the power transmission shaft 151 strongly rotates in the counterclockwise direction to the opening and closing operation mechanism 130 is transmitted to the spring support mechanism (330, 350, 360, 360c) through the second lever (310). By the open driving force and the elastic force of the open spring (refer to reference numeral 195 of FIG. 2) and the elastic force of the contact spring (that is, the main circuit contact pressure spring 221a or the ground circuit contact spring 221b). However, in the shock absorbing mechanism of the solid insulated load switch according to the present invention, the head 330a of the spring support 330 connected to the second lever 310 rotating counterclockwise by the connecting pin 320 is provided. As it moves horizontally to the left in FIG. 4, the shock absorbing spring 340 is compressed between the spring seat member 350 having a fixed position relative to the head 330a of the spring support 330 which is horizontally moved. Therefore, the force of the elastic force is buffered to protect the opening and closing operation mechanism 130 connected to the power transmission shaft 151 from deformation or damage.

Next, the operation of the buffer mechanism of the solid insulated load switch according to the preferred embodiment of the present invention during the operation of the solid insulated load switch.

When the opening and closing operation mechanism 130 outputs the rotation driving force to the main circuit input position by electric or manual operation, the power transmission shaft 151 is in the same direction as the central axis which is the output shaft of the opening and closing operation mechanism 130. In FIG. 1 or FIG. 2, rotation is performed clockwise. Thereby, the connecting rod 161 connected by the power transmission shaft 151 and the connecting lever moves upward, and the cam shaft 171 connected to the connecting rod 161 by the connecting lever (not shown) is shown in FIG. Rotate clockwise from the closed state. Subsequent main circuit closing operations have been described above, and will be omitted to avoid repetition.

At this time, in the buffer mechanism of the solid insulation load switch according to the present invention, according to the clockwise rotation of the power transmission shaft 151, the second lever 310 stored in the power transmission shaft 151 rotates in the counterclockwise direction. The shock absorbing spring 340 is compressed and stretches again after passing through a dead point to impart an elastic force to the second lever 310 in a feeding operation direction (clockwise in FIG. 4). Accordingly, the head 330a of the spring support 330 pushes the second lever 310, so that the clockwise rotation of the second lever 310 and the power transmission shaft 151 is accelerated further, that is, the rotation of the feeding operation direction. do.

110: main circuit switch 120: ground circuit switch
130: opening and closing operation mechanism 140: support frame
150: power transmission device 151: power transmission shaft
161: connecting rod 171: camshaft
175a: main cam 175b: open cam
175c: ground circuit auxiliary drive cam 181: first operating shaft
191: second operating shaft 221a: main circuit contact spring
221b: Ground circuit contact spring 251: Main circuit link part
257,267: roller 261: ground circuit link part
300: shock absorber 310: second lever
320: connection pin 330: spring support
330a: head part (spring support) 330b: body part (spring support)
340: buffer spring 350: spring seat member
350a: support groove
360: support expectation 360a: horizontal support plate
360b: vertical support plate 360c: support protrusion

Claims (4)

A switching actuator mechanism for providing an opening and closing drive force, a power transmission shaft connected to an output end of the opening and closing operation mechanism, and transmitting power by rotating, and being supported by the power transmission shaft to rotate the power transmission shaft. Therefore, a connecting rod connected to the first lever and the first lever rotatable and movable up and down in accordance with the rotation of the first lever, and connected to the connecting rod to rotate according to the elevation of the connecting rod. A cam shaft, a cam pivoted on the camshaft, a cam rotatable, a main circuit switch provided for opening and closing of the main power circuit and having a movable contactor and a fixed contactor, for opening and closing of the ground circuit, A ground circuit switch having a movable contactor and a fixed contactor, which is provided to be in contact with the surface of the cam, and moves up and down as the cam rotates. A first link unit and a second link unit for opening and closing the main circuit switch and the ground circuit switch, respectively, and a first operating shaft and a second operating shaft supporting the first link unit and the second link unit, respectively. And an open spring connected between the first operating shaft and the second operating shaft to apply an elastic force to the first operating shaft during the opening operation of the main circuit switch, and to a movable contact of the main circuit switch and the ground circuit switch. A solid-state insulated load switch comprising a contact spring for providing an elastic force to maintain a contact pressure with a fixed contactor.
A second lever coaxially supported with the first lever on the power transmission shaft and rotatable together in accordance with the rotation of the power transmission shaft;
It has one end connected to another rotary shaft separate from the power transmission shaft and the other end connected to the second lever by a connecting pin, and rotates in a direction opposite to the rotation direction of the second lever in accordance with the rotation of the second lever A spring support mechanism comprising a spring support possible; And
Supported by the spring support mechanism,
The driving force transmitted from the opening and closing operation mechanism through the power transmission shaft and the elastic force of the open spring and the contact spring transmitted from the power transmission shaft to the spring support mechanism through the second lever during the opening operation of the solid insulation load switch. Buffer the force of
And a shock absorbing spring for imparting an elastic force for accelerating rotation in the feeding direction to the second lever during the closing operation of the solid insulated load switch. The method of claim 1,
The spring support mechanism,
The spring support having a head portion connected to the second lever and movable up and down and a body portion having a diameter smaller than the head portion and extending from the head and axially supported to be rotatable; And
And a support base for providing a rotational support point to allow the spring support to be rotatable. The method of claim 2,
The spring support,
The head portion connected to the second lever by a connecting pin and supporting one end of the shock absorbing spring; And
And a body having a diameter smaller than the head and extending from the head and extending through the buffer spring,
The second lever has a connection pin hole formed by a long hole for allowing the connection pin to flow therethrough;
The buffer mechanism of the solid insulation load switch,
A spring seat member fitted to the spring support and supporting the other end of the shock absorbing spring;
And axially supporting the spring sheet member to provide a rotational support point to the body portion of the spring support, the support shaft being fixed to the support base. The method of claim 3,
Expect the support above,
Horizontal support plate; And
And a pair of vertical support plate portions formed upright from an upper surface of the horizontal support plate portion and formed to be spaced apart from each other at predetermined intervals.
The support shaft portion has a support protrusion formed to protrude into the gap between each of the pair of vertical support plate,
The spring sheet member has a pair of support grooves for allowing the support protrusion to be inserted, the shock absorbing mechanism of the solid insulated load switch.

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