RU2401471C2 - Device for setting spring of compressed-air circuit breaker - Google Patents

Abstract

FIELD: electricity. ^ SUBSTANCE: device for setting spring of compressed-air circuit breaker contains driving plates, drive motor, and secondary gear. It is equipped with at least one or more microswitches and changeover lever to turn on/off the microswitches capable to compress the spring and warn about completion of spring compression when setting is over. ^ EFFECT: improvement of efficiency when user operates compressed-air circuit breaker. ^ 10 cl, 11 dwg

Description

[TECHNICAL FIELD]

The following description relates generally to an air circuit breaker spring winding device, and in particular to an air circuit breaker spring winding device that is provided with at least one or more microswitches and a shift lever for turning on / off a microswitch capable of compressing the connecting spring of the air circuit breaker and notify the completion of compression of the connecting spring when the winding is completed.

[BACKGROUND OF THE INVENTION]

In general, an air circuit breaker includes a fixed contactor and a movable contactor, which is moved to the connected position to close the conductive circuit by contacting the fixed contactor and to the interrupt (trip) position to open the conductive circuit by separating from the fixed contactor, and provides constant contact between the movable and fixed contactors for current flow, but with an abnormal overcurrent (strong current caused, for example, by a short circuit and a short to earth) arising in an electrical line, such as a power line, distribution line and private transformer installations, the movable contactor is quickly separated from the fixed contactor in order to interrupt the current flow and thus protect the load units, such as a motor, transformer or electric line, from abnormal current. The air circuit breaker also opens the movable and fixed contactors for drawing in compressed air and detecting an electric arc generated when an abnormal current occurs.

As noted above, an air circuit breaker is used to pass high voltage current to a power plant or distribution station or to disconnect current from them and is installed, if necessary, with an actuator for quickly interrupting or separating the contact point between the fixed contactor and the movable contactor. The methods of actuating the actuator are usually divided into a manual control method, a control method using a solenoid, and an electromechanical control method using a spring.

In an air circuit breaker with an electromechanical control method using a spring, the breaking spring is elastically connected to one side of the cam axis assembled with a winding cam connected to the link, which, in turn, is connected to a movable contactor; wherein a manual winding device that rotates the cam axis using a manual lever, or an electric winding device using an electric motor, is connected to the cam axis. The cam axis rotates while the main energy with added torque is accumulated as much as possible in the breaking spring using the winding device. If necessary, the latch is released to rotate the cam axis using the stored energy of the tripping spring, and a successively engaged link separates the movable contactor from the stationary contactor to turn off the current.

FIG. 1 is a general view of the configuration of a typical air circuit breaker, and FIGs. 2a, 2b, and 2c are schematic views sequentially showing the operating state of the actuator.

According to FIGS. 1, 2a, 2b and 2c, a typical air circuit breaker includes a connecting spring (hereinafter referred to as spring 11) selectively separating or connecting the contact point between the fixed contactor (3) and the movable contactor (5) for opening and closing the conductive circuit, a mechanism (1), including a coupling (15), breaking the spring (21) and the cam axis (30), a drive motor (hereinafter the electric motor 50), turning the cam axis (30), and the winding device (40), including the gear unit ( 60) and the secondary gear (70).

Next, with reference to FIGS. 2a, 2b and 2c, an actuator (10) of a typical air circuit breaker will be described. FIG. 2a shows the initial state of the actuator (1), in which the contact point between the fixed contactor (3) and the movable contactor (5) is open.

Then, the axis of the cam (30) is rotated by the drive motor (50) or the crank (not shown), and the drive lever (16) is rotated by turning the crown of the cam (12) engaged with the axis of the cam to compress the connecting spring (11) to the state 2b, that is, in a completed winding state. The clockwork cam (12), due to the energy accumulated by the spring (11), maintains a balance of forces thanks to the inclusion lever (14) in contact with the connecting latch (13). The engagement link (17) in contact with the engagement solenoid (not shown) is in a position that pivots the engagement lever (14).

Then, when the user presses the connection button or turns the on lever (14), allowing the connection solenoid to move the connection link (17) down, the connecting latch (13) releases the crown (12) to transmit the accumulated spring force (11) to the connections (15) ) through the drive lever (16). The opening and closing axis (10) rotates clockwise, making contact between the contact points of the fixed contactor (3) and the moving contactor (5) by means of the opening and closing lever (20), which rotates in engagement with the opening and closing axis (10), and stretching breaking spring (21), the state of which is presented in FIG. 2c. The contact state of the contact points between the fixed contactor (3) and the movable contactor (5), that is, the balance of forces of the connected air circuit breaker, is maintained by means of an opening lever (23) through a link (15) and an opening latch (22).

Then, when the user presses the disconnect button (not shown), having detected the occurrence of an abnormal current caused by a malfunction on the electrical line, or the release lever (23) is rotated by the trip solenoid (not shown), the release latch (22) is rotated to release the connection ( 15), switched during the connection, and turn the opening-closing axis (10) in accordance with the tensile force of the breaking spring (21), so that the contact point of the fixed contactor (3) and the movable contactor (5) is blurred repents with the provision of the state of current shutdown presented in FIG. 2a.

At the same time, an electric motor (50) for rotating the axis of the cam (30) is controlled by a micro switch (not shown) to control the electric motor provided on the winding device. The micro switch for controlling the electric motor provides current in the electric motor circuit (50) for winding (compressing) the spring (11), ensuring the transmission of the rotational force of the electric motor (50) to the axis of the cam (30). As shown in FIG. 2b, after completion of the winding, the current in the motor circuit (50) is turned off.

During operation of the air circuit breaker, it becomes necessary to notify the user (operator) of the completion of the factory. However, the aforementioned winding device (40) of a typical air circuit breaker does not have a separate means to alert the user (operator) of the completion of the winding shown in FIG. 2b. The micro switch for controlling the electric motor is usually designed to provide current in the motor circuit (50), and although the micro switch for controlling the electric motor can additionally have a separate distribution circuit to notify the user of the completion of the winding, it is not recommended to install a design with a separate distribution circuit on the micro switch for controlling an electric motor due to the complexity of the distribution circuit and possible erroneous operation of the electric motor (50).

[TECHNICAL SOLUTION]

The present disclosure is provided to address the aforementioned disadvantages, and the purpose of the present disclosure is to provide a spring winding device for an air circuit breaker, wherein the spring winding device is provided with at least one or more microswitches and a shift lever for turning on / off a microswitch capable of compressing the air spring connecting spring circuit breaker and notify the completion of compression of the connecting spring when winding is completed, increasing m the most efficient operation of the air circuit breaker by the user (operator).

In a general aspect, a spring winding device of an air circuit breaker comprises: a first and a second plate connected by a plurality of rods at a predetermined distance from one another; a drive motor mounted on a first plate; a secondary gear made with a predetermined recess on the peripheral surface and mounted on a second plate for connection with the axis of the cam for winding the connecting spring; a gear unit connecting the drive motor to the secondary gear to transmit rotational forces of the drive motor to the secondary gear; a micro switch for controlling the drive motor mounted on one side of the second plate; a first microswitch fixed to the outer surface of the microswitch to control the drive motor; display means electrically connected to the first microswitch and a switching lever made with a transfer contactor having a protrusion at one end thereof, in contact with a peripheral surface of the secondary gear, a hinge assembly deviated from the other end of the transfer contactor and having a hinged through hole at its remote end , and with a push switch located perpendicular to the transfer contactor and the hinge unit, while the switching lever is mounted with the possibility of rotation ota on the second plate via a hinge axle inserted into the hinge through hole.

Exemplary embodiments of this aspect may include one or more of the following features.

The push switch may have an increasing thickness as it moves away from the transfer contactor to lower the lower surface selectively contacting the microswitches.

The push switch may have a first protrusion to increase the pressing force of the first micro switch.

The switching lever may further comprise a first rib to prevent bending of the push switch due to the fact that it is made in the same plane with the push switch and extends from it to connect to the hinge assembly.

The switching lever can additionally be made with a second rib to prevent bending of the push switch due to the fact that it is perpendicular to the push switch and extends from it to connect to the transfer contactor.

The first microswitch from the side of its upper surface can additionally be made with a second microswitch connected to a separate display means, and the push switch can be made with a second protrusion to increase the pressing force of the second microswitch.

An insulating plate may be located between the second plate and the microswitch to control the drive motor.

An insulation plate may be arranged between the first micro switch and the micro switch to control the drive motor.

An insulation plate may be arranged between the first microswitch and the second microswitch.

[ADVANTAGES OF USE]

An advantage of a spring winding device of an air circuit breaker is that the spring winding device is provided with at least one or more microswitches and a switching lever for turning on / off a microswitch capable of compressing the connecting spring of the air circuit breaker and notifying that the spring is compressed when the winding completed, thereby increasing the efficiency of operation of the air circuit breaker by the user (operator).

[DESCRIPTION OF THE DRAWINGS]

1 is a general view of a typical air circuit breaker.

FIGS. 2a, 2b, and 2c are schematic views in which the structure and operating state of the actuator shown in FIG. 1 are successively disclosed.

FIG. 3 is a perspective view of a device for turning on a connecting spring of an air circuit breaker in accordance with an embodiment.

FIG. 4 is a separate general view in a certain way of the organized relationship of the secondary gear, the shift lever and the microswitch of the drive motor shown in FIG. 3.

FIG. 5a and FIG. 5b are a general view of the shift lever shown in FIG. 4.

FIG. 5c is a side view of the shift lever shown in FIG. 5a.

FIGS. 6a and 6b are structural images in operating positions showing the operational state of the connecting spring winding device of the air circuit breaker in accordance with an embodiment.

[PRINCIPLE OF WORK OF THE INVENTION]

Exemplary embodiments of a spring winding device of an air circuit breaker in accordance with this new principle will be described in detail with reference to the attached drawings.

FIG. 3 is a general view of the connecting spring winding device of the air circuit breaker in accordance with an embodiment, and FIG. 4 is a separate general view of the interconnected secondary gear, the shift lever and the microswitch of the drive motor shown in FIG. 3 in a certain way.

According to FIGS. 3 and 4, the winding device (100) of the spring of the air circuit breaker includes first and second plates (111, 112) connected by a plurality of rods at a predetermined distance from one another.

The first plate (111) is equipped with a drive motor (120, hereinafter the electric motor) to provide rotational forces for the cam axis (30) to compress the connecting spring (11, hereinafter the spring, see FIGS. 2a, 2b and 2c).

The second plate (112), made with a recess (132) made on the peripheral surface (131), and a protruding element (133) made prominent on one side of the peripheral surface (131), is equipped with a secondary gear (130) for connection with the axis of the cam (thirty). 4, the position 135 not disclosed in FIG. 4 indicates a recess for inserting a cam axis into which a cam axis (30) is inserted.

Between the first and second plates (111, 112) there is a gear unit (190, see FIG. 6a) connecting the electric motor (120) to the secondary gear (130) to transmit the rotational force of the electric motor (120) to the secondary gear (130).

The second plate (112) is equipped on one side with a microswitch (150) for controlling the electric motor, which controls the operation of the electric motor (120) by supplying current to the electric motor circuit (120) or turning it off under the action of the switching lever (140, see below). Between the micro switch (150) for controlling the electric motor and the second plate (112) there is an insulating plate (180) for isolating the micro switch (150) for controlling the electric motor.

The micro switch (150) for controlling the electric motor is provided externally with the first micro switch (160), which is turned on / off by the action of the switching lever (140) to notify the user of the completion of the winding by supplying current to the circuit of a display device (not shown), for example, a buzzer or a lamp, when spring (11) is compressed to complete winding. Between the first microswitch (160) and the microswitch (150) for controlling the electric motor there is an insulating plate (180) for isolating the first microswitch (160).

The first micro switch (160) may be further provided externally with a second micro switch (170). Like the first microswitch (160), the second microswitch (170) is turned on / off by the action of the switching lever (140).

When in a system in which many users (operators) work with it to operate the air circuit breaker efficiently, the spring (11) is compressed to complete winding, as shown in FIG. 2b, the second microswitch can be connected to another display device (not shown) , such as a buzzer or lamp, provided separately from a display means (not shown), such as a buzzer or lamp connected to the first microswitch (160), to notify the second user (operator) of the completion of the winding, or It is connected to another operator in the system of the air circuit breaker, for example to a connection solenoid for connecting the circuit breaker after the completion of charging as illustrated in FIG.2b.

In this case, between the first microswitch (160) and the second microswitch (170), an insulating plate (180) can be arranged to isolate the second microswitch (170).

Next, the shift lever (140) will be described in detail with reference to the attached drawings.

FIG. 5a and FIG. 5b are a general view of the shift lever shown in FIG. 4, and FIG. 5c is a side view of the shift lever shown in FIG. 5a.

According to FIGS. 4, 5a, 5b and 5c, the switching lever (140) is made with a transfer contactor (141) having a protrusion (141a) at one end of it, in contact with the peripheral surface (131) of the secondary gear (130), the hinge unit (143 ) deviating from the other end of the transfer contactor (141) and having a through hinge hole (143a) at its remote end, and with a push switch (145) located perpendicular to the transfer contactor (141) and the hinge unit (143), while the switching lever (140) mounted rotatably on the second astynom (112) via a hinge axle (113) provided on one side of the second plate (112).

A push switch (145) can press each button (not shown) of the micro switch (150) to control the motor and the first micro switch (160), while the protrusion (141a) on the transfer contactor (141) of the shift lever (140) is in contact with the peripheral surface ( 131) secondary gear (130). Under certain circumstances, the push switch (145) may press the buttons (not shown) of the second microswitch (170), so that the pressing force of each button of the microswitches (150, 160, 170) may decrease with distance from the transfer contactor (141). To maintain a decreasing pressing force, the thickness of the push switch (145) is increased with distance from the transfer contactor (141), as shown in FIG. 5c, to lower the lower surface in contact with each button of the microswitches (150, 160, 170).

The push switch (145) may be further configured with a second protrusion (145b) pressing the second micro switch (170) and a first protrusion (145a) pressing the first micro switch (160), while the protrusion (141a) present on the transfer contactor (141) of the shift lever (140) abuts against the peripheral surface (131) of the secondary gear (130).

As shown above, the push switch (145) presses the micro switch (150) to control the motor and each button of the first micro switch (160), and in some cases also presses the buttons of the second micro switch (170), so that the push switch (145) tends to bend as it moves away from the transfer contactor (141). To prevent bending of the push switch (145) during operation, the shift lever (140) is made with the first rib (146) made in the same plane as the push switch (145) and extending from it to connect to the hinge assembly (143), and the second an edge (147) made perpendicular to the push switch (145) and extending from it to connect to the transfer contactor (141).

Next will be described in detail the operating status of the device winding the spring of the air circuit breaker in accordance with the operation of the above microswitches (150, 160, 170) and with reference to FIG.6a and 6b.

FIGS. 6a and 6b are structural images in operating positions showing the operational state of the spring winding device of the air circuit breaker in accordance with an embodiment.

FIG. 6a shows a state in which the motor (120) is driven to rotate the secondary gear (130) clockwise, whereby the axis of the cam (30) is rotated to wind the spring (11, see FIG. 2a). In other words, FIG. 6a shows a state in which a protrusion (141a) present on the transmission contactor (141) of the shift lever (140) comes into contact with the peripheral surface (131) of the secondary gear (130), and the left remote end of the push the switch (145) presses the button of the micro switch (150) to control the motor, so that the micro switch (150) of the motor control provides current to the circuit of the motor (120), by means of which the secondary gear (130) is rotated clockwise, as shown in FI .5a.

The internal circuit of the micro switch (150) for controlling the electric motor under normal conditions maintains the open state of the contact point, but changes the state of the contact point to closed when current is applied to the electric motor circuit (120) by allowing the button to be pressed with the left remote end of the push switch (145).

At the same time, the internal circuit of the first and second microswitches (160, 170), located on the same axis as the microswitch (150) to control the motor, maintains the closed state of the contact point under normal conditions, but changes the state of the contact point to open to disconnect the current flowing to the solenoid that connects the display means, for example a buzzer or a lamp, due to the fact that the state of the contact point changes to open when each button is pressed by a push switch (145) or the first or second stupa (145a, 145b), available on the pressure switch (145).

Then, when the electric motor (120) continues to rotate the secondary gear (130) clockwise, and the protrusion (141a) present on the transmission contactor (141) of the shift lever (140) is in the insertion position in the recess (132) made on the peripheral of the surface (131) of the secondary gear (130), as shown in FIG. 6b, the restoring force of the microswitch buttons (150, 160, 170) acts on the push switch (145) to force the protrusion (141a) present on the transfer contactor (141) the shift lever (140), enter the recess (132) at the peripheral the surface (131) of the secondary gear (130). This state is the completed state of the spring winding, as shown in FIG. 2b.

At the same time, the buttons of the microswitch (150) for controlling the electric motor are released to ensure that the internal circuit switches to the state of the open contact point, whereby the current in the electric motor circuit (120) is turned off to stop the action of the electric motor (120). As a result, the transmission of rotational force is stopped to stop the secondary gear (130), and the axis of the cam (30) stops turning. At this point, the protruding element (133), made on the peripheral surface (131) of the secondary gear (130), engages with the stopper (114) on the second plate (112), thereby eliminating the possibility of turning the secondary gear (130) only acting rotational effort.

At the same time, each button of the first and second microswitches (160, 170) located on the same axis as the microswitch (150) for controlling the electric motor is freed from compression, and the internal circuit of the first and second microswitches (160, 170) goes into a closed point state contact, providing current to the display means, such as a buzzer or lamp, with which the user (operator) is notified of the completion of the winding, or providing current to the solenoid, thereby connecting the circuit breaker l, as shown in FIG. 2c.

[INDUSTRIAL APPLICABILITY]

As noted above, the air spring circuit breaker spring winding device is provided with at least one or more microswitches (160, 170) and a shift lever (140) for turning on / off the microswitches (160, 170) capable of compressing the spring and notifying the completion of compression springs when the winding is completed, thereby increasing the efficiency of operation of the air circuit breaker by the user (operator).

Although the present invention is shown and described only by examples of its implementation, the general principle of the invention is not limited to the above examples of implementation. Those skilled in the art will understand that various changes in form and details are possible without departing from the spirit and scope of the present invention as defined in the following claims.

Claims (10)

1. The device for winding the spring of an air circuit breaker, characterized in that it contains: first and second plates connected by a plurality of rods at a given distance from one another; a drive motor mounted on a first plate; a secondary gear made with a predetermined recess on the peripheral surface and mounted on a second plate for connection with the axis of the cam for winding the connecting spring; a gear unit connecting the drive motor to the secondary gear to transmit rotational forces of the drive motor to the secondary gear; a micro switch for controlling the drive motor mounted on one side of the second plate; a first microswitch fixed to the outer surface of the microswitch to control the drive motor; display means electrically connected to the first microswitch; and a switching lever made with a transfer contactor having a protrusion at one end thereof, in contact with the peripheral surface of the secondary gear, a hinge assembly deviated from the other end of the transfer contactor and having an articulated through hole at its remote end, and with a push switch located perpendicular to the transfer the contactor and the hinge unit, while the switching lever is mounted to rotate on the second plate through the hinge axis inserted into the hinge with Fuss hole. 2. The spring winding device according to claim 1, characterized in that the push switch has an increasing thickness as it moves away from the transfer contactor in order to lower the lower surface selectively contacting the microswitches. 3. The spring winding device according to claim 1, characterized in that the push switch is made with a first protrusion to increase the pressing force of the first micro switch. 4. The spring winding device according to claim 1, characterized in that the switching lever further includes a first rib to prevent bending of the push switch due to the fact that it is made in the same plane with the push switch and extends from it to connect to the hinge assembly. 5. The spring winding device according to claim 1, characterized in that the switching lever is additionally made with a second rib, which prevents bending of the push switch due to the fact that it is perpendicular to the push switch and extends from it to connect to the transfer contactor. 6. The spring winding device according to claim 1, further characterized by the presence of a second micro switch and a separate display means connected to a second micro switch located on the first micro switch. 7. The spring winding device according to claim 6, characterized in that the push switch is made with a second protrusion in order to increase the pressing force of the second micro switch. 8. The device for winding the spring according to claim 1, characterized in that between the second plate and the micro switch to control the drive motor is an insulating plate. 9. The spring winding device according to claim 1, characterized in that between the first microswitch and the microswitch for controlling the drive motor there is an insulating plate. 10. The spring winding device according to claim 6, characterized in that between the first microswitch and the second microswitch is an insulating plate.

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