CN104319130B - Operating mechanism and blocking device thereof - Google Patents

Abstract

The invention discloses an operating mechanism and a locking device thereof. The rigid locking part of the locking device is movably assembled on the tripping bracket for blocking and avoiding in the swing direction of the unlocking position of the latch swing arm when the latch swing arm is in the locked position, and on the tripping bracket There is an anti-escape structure for preventing the locking member from disengaging from the latch swing arm when the locking member blocks the latch swing arm, and the locking member is provided with a switch for switching the locking member from blocking and avoiding the latch swing arm. force structure. When the latch is in the locked position, the locking member can block and avoid the swing arm of the latch to realize the limit and avoidance of the swing arm of the latch, which plays the role of insurance before the swing arm of the latch swings. In this way, the anti-mistouch function of the tripping device during use is increased, the idle safety of the tripping device is ensured, and the locking function of the opening and closing action of the entire operating mechanism is also maintained.

Description

Operating mechanism and its locking device

technical field

The invention relates to an operating mechanism and a locking device thereof.

Background technique

At present, the closing and tripping device in the operating mechanism of an ordinary circuit breaker is mainly composed of a closing and tripping pawl, a closing latch and a closing electromagnet. The latch swing arm of the closing latch passes through the top of the closing electromagnet. Push and rotate on the frame to realize the limit of the closing and tripping detent in the state of energy storage and the release of the limit of the closing and tripping detent in the closing state. The existing closing and tripping device can be divided into two types according to the different structures of the closing latch, one is the closing and tripping module disclosed in Chinese patent document 201220001606.3, the new spring operating mechanism, and the other is such as The opening and closing device disclosed in Chinese patent document 201220735252.5, spring operating mechanism. In the former closing and tripping device, the closing latch is a holding pawl that is rotatably assembled on the frame. One end of the holding pawl, the latch swing arm is matched with the roller on the closing and tripping pawl, and the other end is matched with the closing latch. Cooperate with the release piece fixed on the brake electromagnet. In the latter type of closing and tripping device, the closing latch is a closing semi-shaft rotatably assembled on the frame. One end of the closing semi-shaft is provided with a semi-shaft structure cooperating with the closing and tripping latch, and the other end is provided with a There is a closing latch swing arm that cooperates with the V-shaped crank arm fixed on the manual operation shaft and the closing electromagnet.

In order to ensure that the circuit breaker can be reliably locked in the opening position, it is necessary to use an isolated circuit breaker to replace the existing ordinary circuit breaker in the high-voltage line. The difference between the contact system of the isolated circuit breaker and the ordinary circuit breaker is mainly that, The isolated circuit breaker needs to be equipped with a mechanical isolation locking device to ensure the correct opening and closing action and have a mechanical locking function. The locking function of the existing isolated circuit breaker is realized in the transmission system of the circuit breaker, and has no connection with the operating mechanism; button, but the closing latch of the mechanism is not limited. After the button of the closing electromagnet is subjected to abnormal impact, vibration or accidental touch, the closing latch will still move toward the opening and closing release detent. direction rotation, resulting in closing and tripping, the energy storage wheel rotates slightly with the output cam at a certain angle under the drive of the spring. Closed, but the closing trip catch of the spring operating mechanism has been released, and the gap size of the output cam has been destroyed. Once the locking function of the locking device in the circuit breaker body is released, the isolated circuit breaker will be closed immediately and suddenly. As a result, the closing action of the isolated circuit breaker is too fast and the closing characteristics cannot meet the technical requirements, which makes the closing action of the isolated circuit breaker a greater safety hazard.

Contents of the invention

The object of the present invention is to provide a locking device that prevents the lock bolt from rotating in the direction of letting go of the tripping pawl when the electromagnet or manual operation shaft of the tripping device is misoperated, and also provides a locking device using the locking device. moving mechanism.

In order to achieve the above object, the technical scheme of the tripping device in the present invention is as follows:

The locking device includes a rigid locking piece that is movably assembled on the trip bracket so that when the swinging arm of the locking bolt is in the locked position, it can stop and avoid in the swing direction of the swinging arm of the locking bolt in the unlocking position. A force-applying structure is provided for switching the blocking and avoidance of the locking member to the swing arm of the latch.

The locking part is a locking pin shaft assembled on the trip bracket for movable guiding along the rotation axis direction of the locking bolt, and the force applying structure is a pulling-in structure for axially pulling in and out of the locking pin shaft.

The pull-in structure includes a force-applying swing arm mounted on the trip bracket for rotation and a connecting rod bridged between the force-apply swing arm and the locking pin shaft. The force-apply swing arm is vertically interlaced with the rotation axis of the latch The axis of rotation, the force-applying swing arm, connecting rod and locking pin form a crank-slider mechanism on the trip bracket.

The force-applying swing arm is fixed on the outer periphery of the force-applying rotating shaft, and there is a device on the periphery of the force-applying swing arm for preventing the force-applying swing arm from continuing to push the locking pin after the locking pin is pushed to the position of blocking the swing arm of the latch. Locking limiter for swinging in the direction of the pin shaft.

The locking limiter is a travel switch arranged at intervals on the periphery of the force-applying swing arm, and a control cam that cooperates with the locking travel switch is also fixed on the force-applying shaft. The control device is electrically connected with a force application motor for closing when the control cam touches the locking limiter, and the output end of the force application motor is connected to the force application rotating shaft through transmission.

The technical scheme of operating mechanism among the present invention is as follows:

The operating mechanism includes the frame and the detents assembled on it, and the tripping device. The tripping device includes a tripping bracket that is fixed or integrally arranged on the frame. The tripping bracket is equipped with a detent that rotates around axes parallel to each other. And the latch used to release the limit of the pawl under the action of the operating lever or the electromagnet, the latch is fixed or integrally provided with a radially overhanging latch swing arm along the rotation axis, the latch swing arm The limit positions on both sides of the swing stroke on the trip bracket are respectively used for the corresponding locking position when the latch presses against the pawl so that the pawl is limited by the latch, and for when the latch is operated. The lever or electromagnet is pushed to release the unlocking position of the limit of the pawl. The tripping bracket is also equipped with a locking device. It is a rigid locking piece that can stop and avoid in the direction of swinging of the swing arm of the latch when it is unlocked, and is provided on the trip bracket to prevent the locking piece from moving from the swing arm of the latch when the locking piece blocks the swing arm of the latch. The upper disengagement preventing structure is provided with a force-applying structure on the locking piece for switching the blocking and avoidance of the locking piece to the swing arm of the latch.

The locking part is a locking pin that is movably guided and assembled on the trip bracket along the direction of the rotation axis of the lock bolt. The anti-escape structure includes a support wall that is fixed or integrally arranged on the trip bracket. When blocking the swing arm of the latch, it is stopped on the support surface of the locking pin shaft facing away from the swing arm of the latch;

The pull-in structure includes the force-applying swing arm rotatably assembled on the trip bracket and the connecting rod bridged between the force-apply swing arm and the locking pin shaft, the rotation axis of the force-apply swing arm and the rotation axis of the lock bolt are vertically staggered in space , The force-applying swing arm, connecting rod and locking pin form a crank-slider mechanism on the trip bracket.

The force-applying swing arm is fixed on the outer periphery of the force-applying rotating shaft, and there is a device on the periphery of the force-applying swing arm for preventing the force-applying swing arm from continuing to push the locking pin after the locking pin is pushed to the position of blocking the swing arm of the latch. A locking limiter that swings in the direction of the pin shaft, and the locking limiter is fixed on the trip bracket.

The locking limiter is a travel switch arranged at intervals on the periphery of the force-applying swing arm, and a control cam that cooperates with the locking travel switch is also fixed on the force-applying shaft. The control device is electrically connected with a force application motor for closing when the control cam touches the locking limiter, and the output end of the force application motor is connected to the force application rotating shaft through transmission.

The tripping bracket of the tripping device in the present invention is movably equipped with a rigid locking piece for stopping and avoiding in the swing direction of the unlocking position of the latch swinging arm when the latch swinging arm is in the locked position, and The buckle bracket is provided with an anti-escape structure for preventing the latch from being disengaged from the latch swing arm when the latch blocks the latch swing arm, and the latch is provided with a stop for switching the latch to the latch swing arm and avoidance force structure. When in use, when the latch is in the locked position, the locking member can move to a position that blocks the swing arm of the latch to prevent the latch from moving to the unlocking position, and the anti-escape structure can ensure that the locking member is stable and reliable to the latch Rigid stop, so that when the electromagnet or operating lever of the operating mechanism is accidentally touched, the swing arm of the latch is blocked by the locking member and will not make the latch rotate, thereby avoiding the release of the latch when the accidental touch is made. and when the locking member needs to rotate to the unlocking position, the locking member can move to a position avoiding the swing arm of the latch, and release the limit of the locking member to the swing arm of the latch, so that the swing arm of the latch can be Turn to the unlocking position to facilitate the normal operation of the operating mechanism. Therefore, in the present invention, when the latch is in the locked position, the blocking and avoidance of the latch swing arm by the locking member can be used to realize the limit and avoidance of the latch swing arm, so as to prevent the latch swing arm from swinging. The safety function of the trip device increases the anti-mistouch function of the trip device during use, ensures the safety of the trip device when it is idle, and also plays a locking function for the opening and closing actions of the entire operating mechanism.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the embodiment of operating mechanism of the present invention;

Fig. 2 is a three-dimensional structural schematic diagram of the closing and tripping device in Fig. 1 in a locked state;

Fig. 3 is a three-dimensional structural schematic diagram of the closing and tripping device in Fig. 1 in an unlocked state;

Fig. 4 is a schematic diagram of the three-dimensional structure of the closing and tripping mechanism in Fig. 2;

Fig. 5 is a schematic diagram of the working principle of the closing and tripping mechanism in Fig. 4;

Fig. 6 is a schematic diagram of the three-dimensional structure of the locking device in Fig. 2;

Fig. 7 is a schematic perspective view of the three-dimensional structure of the locking device in Fig. 2 at another viewing angle;

Fig. 8 is the front view of Fig. 7;

Fig. 9 is a schematic diagram of the circuit principle of the operating mechanism in Fig. 1 in the closing state;

Fig. 10 is a schematic diagram of the circuit principle of the blocking device in Fig. 1 in the opening state.

detailed description

Embodiments of the operating mechanism in the present invention: as shown in Figures 1 to 8, the operating mechanism is a spring operating mechanism of an isolated circuit breaker with a closing and locking function, and is mainly composed of the frame and the Electric energy storage device 1, closing energy storage device 2, closing tripping device 3, opening energy storage device 4, opening tripping device 5, auxiliary switch signal output device 6 and opening and closing output device 7, The improvement of the operating mechanism in this embodiment lies in the closing and tripping device 5, and the structures of other devices belong to the prior art. The closing and tripping device 5 is composed of two parts: a closing and tripping mechanism and a locking device. The closing and tripping mechanism is composed of a main body bracket 511 fixed on the frame and a closing pawl 512, a closing latch 513 and a closing electromagnet 514 arranged in sequence from right to left on the frame. The closing pawl 512 and the closing The lock bolts 513 are rotatably assembled on the front side of the trip bracket through the rotating shafts extending forward and backward parallel to each other. The closing latch 512 is a single pendulum structure whose upper end is connected to the main body bracket 511. The closing latch 513 is connected to the main body in the middle. The lever structure extending left and right on the bracket 511, the two ends of the closing latch 513 are respectively integrally provided with a left latch swing arm 5131 and a right latch swing arm 5132, and the upper end of the closing electromagnet 514 is fixed with a left latch swing arm. The release member 5141 matched with the swing arm 5131 . The locking device is a locking device that can realize the closing and locking of the spring operating mechanism of the isolated circuit breaker. It is composed of a position piece, a force applying motor, and an auxiliary switch 5212, wherein the locking piece is guided by front and rear movement and assembled on the locking pin 524 on the closing base 518 provided under the right force applying swing arm, and the force applying bracket 5211 is fixed on the frame At the position before the main body bracket 511, the force applying shaft 521 is rotated and assembled on the force applying bracket 5211 around the axis extending left and right. The front end of the front end is hinged on the rear end of the locking pin shaft 524, and the rear end is hinged on the raised part of the transmission crank arm 529. The control cam is fixed on the outer circumference of the force application rotating shaft 521 and is on the control cam 5210 on the left side of the transmission crank arm 529. , the force application motor 527 is connected to the right end of the force application shaft 521 through a transmission mechanism, the auxiliary switch 5212 is connected to the left end of the force application shaft 521 through a flange drive, and the limiter is the locking travel switch 522 behind the force application shaft 521 and The unlock travel switch 5213 in front of the force-applying rotating shaft 521. The main body bracket 511 and the force-applying bracket 5211 form a closing and tripping bracket that provides installation positions for the entire closing and tripping device on the frame, so that the locking pin shaft 524, connecting rod and driving arm are on the closing and tripping bracket. A slider crank mechanism is formed. In this way, when the operating mechanism is in the closing and holding state, the lower end of the closing pawl 512 is limited by the right latch swing arm 5132 of the closing latch 513 to hold the holding pin 516 protruding from the rear end of the energy storage ratchet 515 The anti-off connection, the right latch swing arm 5132 of the closing latch 513 is blocked on the lower side of the limit pin 5133 fixed on the main body bracket 511, so that the right latch swing arm 5132 of the closing latch 513 is in the The single pendulum travel limit position on the upper side keeps the limit position on the closing pawl 512, that is, the swing stroke limit position of the left latch swing arm 5131 and the right latch swing arm 5132 of the closing latch 513 at this time is the closing position. The lock bolt 513 presses against the closing pawl 512 so that the closing pawl 512 is at the corresponding locking position when it is limited by the closing latch 513, and at the same time, the locking pin 524 will be under the swing arm 5132 of the right latch , and prevent the right latch swing arm 5132 from swinging downward; when it is necessary to close the brake, it is necessary to twitch the locking pin shaft 524 forward first, so that the locking pin shaft 524 avoids the right latch swing arm 5132, and the closing latch 513 The left latch swing arm 5131 is hit upward by the tripping part 5141 and swings to the upper limit position, and drives the right latch swing arm 5132 to swing down to the lower limit position, and the right latch swing arm 5132 will release the coupling The limit of the brake catch 512 makes the closing catch 512 disengage from the holding pin 516, and at this moment the swing stroke limit position of the left latch swing arm 5131 and the right latch swing arm 5132 of the closing latch 513 The unlocking position is for releasing the limit position of the closing pawl 512 when the closing latch 513 is pushed by the electromagnet. thus making

The closing machine base 518 is mainly composed of a fixed part fixed on the main body bracket 511 and two vertical walls arranged at intervals before and after. The two vertical walls are integrally arranged on the right side of the fixed part and overhang to the right. The right side is gradually tilted up, and there are guide holes extending front and back on the right sides of the two vertical walls. The guide holes on the two vertical walls are arranged in pairs opposite to each other. Standing on the wall. The two vertical walls are separately arranged at the front and back sides of the right latch swing arm 5132, so that when the lock pin shaft 524 is inserted into the bottom of the right latch swing arm 5132, the hole wall surface of the guide hole through which the lock pin shaft 524 is inserted Provide front and rear support for the locking pin shaft 524, that is, the part of the hole wall surface that guides the perforation and is located at the locking pin shaft 524 facing away from the right latch swing arm 5132 forms a supporting surface that stops the locking pin shaft 524. When the locking pin shaft 524 blocks the right latch swing arm 5132 , it prevents the locking pin shaft 524 from disengaging from the right latch swing arm 5132 . The connecting rod 523, the force application swing arm, the force application rotating shaft 521, and the force application motor 527 are formed on the front side of the locking pin shaft 524 to realize switching of the locking pin shaft 524 to the right latch swing arm by pulling and inserting the locking pin shaft 524 back and forth. 5132's blocking and avoiding force application structure.

The force application bracket 5211 is mainly composed of a bottom plate fixed on the frame and a left vertical plate and a right vertical plate erected on the bottom plate. The left vertical plate and the right vertical plate are respectively supported at the left and right ends of the force application shaft 521. And at the left and right ends of the force application rotating shaft 521, there are protrudingly provided with limiting shoulders that block the opposite sides of the left vertical board and the right vertical board. The right end of the force-applying rotating shaft 521 passes through the right vertical plate, and a padlock indicating plate 528 indicating the forward and backward swing position of the transmission crank arm 529 is connected with the passing part. The force application motor 527 is fixed on the right side of the right vertical plate at the position above the force application rotating shaft 521. The output shaft of the force application motor 527 passes through the right vertical plate, and the passing part of the output shaft passes through a single-stage gear transmission mechanism. Connected on the outer circumference of the force application rotating shaft 521 , the driving gear 525 connected on the output shaft in the single-stage gear transmission mechanism is larger than the driven gear 526 connected on the force application rotating shaft 521 . The transmission crank arm 529 is on the left side of the driven gear 526 . Both the locking travel switch 522 and the unlocking travel switch 5213 are fixed on the right side of the left vertical plate, and the contact parts of the locking travel switch 522 and the unlocking travel switch 5213 are arranged oppositely. The control cam 5210 is at a position between the lock travel switch 522 and the unlock travel switch 5213 . The auxiliary switch 5212 is on the left side of the left vertical plate, and is fixed on the left edge of the bottom plate by the mounting seat provided on the right side thereof.

The working principle of the closing and tripping mechanism in the closing and tripping device of the operating mechanism of the present embodiment is as follows:

The energy storage spring 517 of the spring operating mechanism has completed energy storage → under the tension of the energy storage spring 517, the closing spring pull rod moves downward → the closing spring pull rod pulls the energy storage ratchet 515 to rotate counterclockwise → installed on the energy storage ratchet 515 The holding pin 516 will press the closing latch 512 to rotate clockwise → the trip roller on the closing latch 512 will press on the right latch swing arm 5132 of the closing latch 513, so that the closing latch 513 reverses Clockwise rotation → due to the limitation of the locking pin 524, the closing latch 513 cannot rotate counterclockwise, so far, the closing lock is realized;

After receiving the closing order, the closing electromagnet 514 is electrified and starts to excite. The striker on the closing electromagnet 514 is subjected to electromagnetic force and moves toward the closing latch 513 with the tripping part 5141 → when the striker and the tripping part After 5141 reaches a certain speed, it impacts the collision surface of the left latch swing arm 5131 of the closing latch 513 → after the closing latch 513 receives the impact force, it destroys the original lock balance of the closing latch 513, making The closing latch 513 rotates clockwise (when the closing latch 513 rotates clockwise, the closing and tripping has been realized so far) → after the closing latch 513 rotates clockwise, the closing pawl is no longer 512 to limit the position, the closing pawl 512 also rotates clockwise, and no longer limits the ratchet 515 → the ratchet 515 rotates counterclockwise with the shaft of the cam 5210 and the cam 5210 to realize the closing operation.

The working principle of the blocking device in the closing and tripping device is as follows:

After closing the lock, put the limit pin 5133 of the isolating locking device under the right end of the closing lock 513 to restrict the clockwise movement of the closing lock 513, thereby maintaining the closing lock state and allowing the circuit breaker The breaker cannot be closed at all, so that the isolation circuit breaker is locked in the open position.

After the locking circuit in the control circuit of the force applying motor 527 reaches the locking command → the locking contactor in the locking circuit is charged and closed, and its contact in the circuit of the motor 527 is closed, so that the force applying motor 527 is charged and rotated → through the single-stage gear Mechanism transmission, the force application shaft 521 rotates → the transmission crank arm 529 rotates with the force application shaft 521 → driven by the connecting rod 523, the locking pin 524 moves forward and backward linearly under the linear guidance of the closing base 518, and is inserted into the closing In the tripping mechanism of the brake, the lower swing of the right latch swing arm 5132 of the closing latch 513 is restricted → when the locking pin shaft 524 moves to the locking position, the control cam 5210 presses the locking travel switch 522 → because the locking travel switch 522 is pressed , its contact in the locking circuit becomes a normally open contact, and the blocking circuit loses power (at the same time, the unlocking travel switch 5213 of the unlocking circuit is not pressed, and its contact in the unlocking circuit becomes a normally closed contact; the auxiliary switch 5212 also rotates to the locked position following the force-applying shaft 521, and the auxiliary switch 5212 is contacted to output a signal.) → Due to the power failure of the locking circuit and the power failure of the locking contactor, its contact in the control circuit is opened, so that The motor 527 stops rotating → the locking action ends;

After the unlocking circuit in the control circuit of the force applying motor 527 receives the unlock command → the locking contactor in the unlocking circuit is charged and closed, and its contact in the circuit of the motor 527 is closed, so that the force applying motor 527 is charged and rotated in reverse → pass Driven by a single-stage gear mechanism, the force application shaft 521 rotates in the opposite direction → the transmission crank arm 529 rotates in the opposite direction with the force application shaft 521 → driven by the connecting rod 523, the locking pin 524 exits the closing and tripping mechanism, and no longer restricts closing The right latch swing arm 5132 of the latch 513 swings down → when the latch pin shaft 524 moves to the unlocked position, the control cam 5210 presses the unlock travel switch 5213 → since the unlock travel switch 5213 is pressed, its contact in the unlock circuit Become a normally open contact, and the unlocking circuit loses power (simultaneously, the locking travel switch 522 of the locking circuit is not pressed, and its contact in the locking circuit becomes a normally closed contact; the auxiliary switch 5212 also rotates to the After the unlocked position, the auxiliary switch 5212 contact is connected to output the signal.) → Due to the power failure of the unlocking circuit, the unlocking contactor is powered off, and its contact in the control circuit is opened, so that the motor 527 stops rotating → the unlocking action ends.

In this implementation, the locking device can be directly installed on the spring operating mechanism of an ordinary circuit breaker without modifying the structure of the spring operating mechanism. The locking pivot pin on the locking device is inserted into the closing base 518 of the spring operating mechanism. Restricting the movement of the closing latch 513 achieves mechanical locking of the isolating circuit breaker. The isolation locking system realized by the locking device has the advantages of reliability, safety, integration, and high versatility, and can reliably ensure that the isolated circuit breaker is locked in the opening position to realize position locking.

As shown in Figure 9 and Figure 10, F1- circuit breaker spring operating mechanism power supply, F2- locking device power supply, KM1- locking device motor closing contactor, KM2- locking device motor opening contactor, M1- locking device opening contactor Closing action motor, SBT5- circuit breaker spring operating mechanism closing transfer switch, SBT10- locking device opening and closing transfer switch, S3- locking device opening and closing state signal output auxiliary switch, S1- circuit breaker spring operating mechanism branch Closing state signal output auxiliary switch, SP1- circuit breaker spring operating mechanism closing spring energy storage control travel switch, SP3- locking device closing control travel switch, SP4- locking device opening control travel switch, YC- circuit breaker spring operation Closing electromagnet coil of the moving mechanism, X-mechanism internal terminal block, X1-locking device opening status signal indicator, X2-locking device closing status signal indicator.

When the circuit breaker needs to be overhauled, the circuit breaker is opened and then overhauled. In order to avoid the vibration caused by natural causes such as earthquakes, the manual operation of human error, and the closing of the circuit breaker spring operating mechanism caused by secondary short circuit or improper operation The action of the electromagnet causes the spring operating mechanism of the circuit breaker to close, which makes the circuit breaker electrified and injures the maintenance personnel. Therefore, it is necessary to put in the closing locking device of the spring operating mechanism of the circuit breaker to mechanically ensure that the spring operating mechanism of the circuit breaker will not close. .

First of all, the spring operating mechanism must be in the energy storage state of the closing spring (the closing spring has no energy storage, and there is no need to perform closing and locking), the spring operating mechanism of the circuit breaker controls the closing of the travel switch SP1, and the operating locking device opens and closes When the switch SBT10 is closed, the coil of the motor closing contactor KM1 of the locking device is energized, and the contacts 13-14 of the motor closing contactor KM1 of the locking device are closed to keep the closing circuit of the locking device continuously charged, and the motor closing contactor of the locking device is closed. The contacts 1-2, 3-4, and 5-6 of KM1 are also closed, so that the contact 1 of the opening and closing action motor M1 of the locking device is positively charged and rotates positively. Through the mechanical transmission of the locking device, the locking pin shaft 524 Action, limit the closing of the spring operating mechanism of the circuit breaker; when the locking pin shaft 524 moves in place, the control cam 5210 pushes the locking device to close and controls the travel switch SP3 to disconnect and cut off the closing circuit of the locking device, and the locking device motor closes the contactor KM1 When the power is lost, the contacts 13-14, 1-2, 3-4, 5-6 are disconnected, the motor circuit is de-energized, and the force-applying shaft 521 rotates the locking device to open and close the state signal and output the auxiliary switch S3 to make it open. Switch between the closing point and the closing point, so that the opening state signal indicator X1 of the locking device is turned off when the power is turned off, and the closing state signal indicator X2 of the locking device is turned on when the power is turned on. The contact 17-18 of the auxiliary switch S3 of the closing state signal output is disconnected, so that the closing control circuit of the circuit breaker spring operating mechanism and the state of the locking device are interlocked to realize breaking and closing. Due to the sudden power loss of the opening and closing action motor M1 of the locking device, the reverse electromotive force of its internal products passes through the brake circuit, and the reverse current generated reverses the motor to achieve braking. After the locking device is closed, the locking device opens and controls the travel switch SP4 to close, and the opening operation can be performed at this time. The principle of the secondary circuit of the opening operation is the same as that of the closing circuit, the only difference is that the contact 2 of the opening and closing action motor M1 of the locking device is positively charged, and the reversal is realized to open the locking device.

In the above embodiments, the force application structure is composed of a driving slider mechanism and an electric device. In other embodiments, the electric device can also be replaced by a manual driving device, and the crank slider mechanism can also be replaced by other transmissions such as an electric push rod mechanism. mechanism or directly push the push-pull structure instead.

In the above-mentioned embodiments, the locking pin shaft blocks the bottom of the swing arm of the right latch. In other embodiments, the locking pin shaft can also block above the swing arm of the left latch. When the latch adopts a half-shaft structure , the locking pin shaft needs to be blocked on the side of the latch swing arm facing away from the crank arm of the operating shaft or the striker rod of the electromagnet, so that the locking pin shaft can swing when the latch swing arm is in the locked position. Block and avoid in the direction of arm unlock position swing.

In the above-mentioned embodiments, the locking member is a locking pin fitted on the closing and tripping bracket by push-fit. In other implementations, the locking pin can also be replaced by a locking half shaft, a locking crankshaft or a locking swing arm, wherein the locking half shaft and the locking crankshaft are assembled on the closing and tripping bracket by rotating around its axial direction, the solid part of the closing half shaft and the locking crankshaft can be in contact with the swing arm of the latch to realize the blocking of the swing arm of the latch, the groove part and the latch When the swing arm cooperates, the swing arm of the latch can be avoided; the swing arm of the lock can swing to the position of blocking the swing arm of the latch when the swing arm of the latch needs to be stopped, and swing to other positions when the swing arm of the latch needs to be avoided.

In the above-mentioned embodiments, the locking device is used on the closing and tripping device. In other embodiments, the above-mentioned locking device can also be installed on the opening and closing tripping device, or a locking device can be installed in both the opening and closing tripping devices. device.

Embodiment of the locking device of the present invention: the structure of the locking device in this embodiment is the same as that of the locking device in the above-mentioned embodiment, so it will not be repeated here.

Claims (6)

1. blocking device, it is characterized in that, it is assemblied in dropout support including for activity, with when lock bolt swing arm is in locking position can on the direction that lock bolt swing arm solution lock-bit swings block and the latching member of rigidity dodged, latching member is the locking bearing pin for being assemblied on dropout support along the pivot center direction activity-oriented of lock bolt swing arm, latching member is provided with for switching latching member to the block of lock bolt swing arm and the force application structure dodged, force application structure is to pull and push structure for axially pull and push along locking bearing pin, pull and push structure and include for rotating the force swing arm being assemblied on dropout support and bridge joint connecting rod between force swing arm and locking bearing pin, force swing arm has the pivot center of the pivot center spatial vertical interlaced arrangement with lock bolt swing arm, force swing arm, connecting rod and locking bearing pin form slider-crank mechanism on dropout support.

Blocking device the most according to claim 1, it is characterized in that, force swing arm be fixed on force rotating shaft periphery on, and force swing arm periphery be provided with the position for being pushed to block lock bolt swing arm at locking bearing pin after, stop force swing arm continue to promote locking bearing pin direction swing locking locating part.

Blocking device the most according to claim 2, it is characterized in that, locking locating part is to be disposed on the locking travel switch that force swing arm is peripheral, the control cam coordinated with locking travel switch it is further fixed in force rotating shaft, control cam and force swing arm interval is arranged, and it being electrically connected with the force motor for closing when control cam touches locking locating part by control device on locking locating part, the outfan of force motor is in transmission connection in force rotating shaft.

null4. operating mechanism，Including frame and the pallet of upper assembling thereof、Trip gear，Trip gear includes dropout support that is fixing or that be integrally disposed upon in frame，It is rotatably equipped with described pallet and for releasing the spacing lock bolt to pallet under the effect of actuating bar or electric magnet around the axis being parallel to each other on dropout support，Fix or be wholely set the lock bolt swing arm of the radial direction overhanging along pivot center on lock bolt，The limit position, both sides of lock bolt swing arm oscillating stroke on dropout support be respectively for be pressed on pallet on lock bolt swing arm top make pallet be removed swing arm spacing time corresponding locking position、For being released the spacing solution lock-bit to pallet in lock bolt swing arm by actuating bar or electric magnet pushing tow，It is characterized in that，It is also equipped with blocking device on dropout support，Blocking device include that activity is assemblied on dropout support for when lock bolt swing arm is in locking position can on the direction that lock bolt swing arm solution lock-bit swings block and the latching member of rigidity dodged，Latching member is the locking bearing pin being assemblied on dropout support along the pivot center direction activity-oriented of lock bolt swing arm，And on dropout support, it is provided with the drop-proof structure for stoping latching member to disengage from lock bolt swing arm when latching member block lock bolt swing arm，Drop-proof structure includes fixing or is integrally disposed upon the supporting walls on dropout support，Supporting walls is provided with for the supporting surface in the locking bearing pin side of lock bolt swing arm dorsad of the block when lockweight axle bumper stops lock bolt swing arm；Latching member is provided with for switching latching member to the block of lock bolt swing arm and the force application structure dodged, force application structure is to pull and push structure for axially pull and push along locking bearing pin, pull and push structure to include rotating the force swing arm being assemblied on dropout support and bridge joint connecting rod between force swing arm and locking bearing pin, the pivot center of force swing arm and the pivot center spatial vertical interlaced arrangement of lock bolt swing arm, force swing arm, connecting rod and locking bearing pin form slider-crank mechanism on dropout support.

Operating mechanism the most according to claim 4, it is characterized in that, force swing arm is fixed on the periphery of force rotating shaft, and force swing arm periphery be provided with the position for being pushed to block lock bolt swing arm at locking bearing pin after, stop force swing arm continue to promote locking bearing pin direction swing locking locating part, locking locating part is fixed on dropout support.

Operating mechanism the most according to claim 5, it is characterized in that, locking locating part is to be disposed on the locking travel switch that force swing arm is peripheral, the control cam coordinated with locking travel switch it is further fixed in force rotating shaft, control cam and force swing arm interval is arranged, and it being electrically connected with the force motor for closing when control cam touches locking locating part by control device on locking locating part, the outfan of force motor is in transmission connection in force rotating shaft.