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WO2016041520A1 - 操动机构及其闭锁装置 - Google Patents

操动机构及其闭锁装置 Download PDF

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Publication number
WO2016041520A1
WO2016041520A1 PCT/CN2015/089939 CN2015089939W WO2016041520A1 WO 2016041520 A1 WO2016041520 A1 WO 2016041520A1 CN 2015089939 W CN2015089939 W CN 2015089939W WO 2016041520 A1 WO2016041520 A1 WO 2016041520A1
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WO
WIPO (PCT)
Prior art keywords
latch
arm
latching
locking
closing
Prior art date
Application number
PCT/CN2015/089939
Other languages
English (en)
French (fr)
Inventor
刘宇
王守山
付亚旭
姚永其
杨珂
张敬涛
王振
仝永刚
邹高鹏
宋超
赵晓民
王鹏超
Original Assignee
国家电网公司
平高集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 国家电网公司, 平高集团有限公司 filed Critical 国家电网公司
Publication of WO2016041520A1 publication Critical patent/WO2016041520A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor

Definitions

  • the invention relates to an operating mechanism and a locking device therefor.
  • the closing device of the common circuit breaker is mainly composed of a closing tripping tweezers, a closing latch and a closing electromagnet, and the latching arm of the closing latch passes the top of the closing electromagnet. Pushing and rotating on the frame to achieve the limit of closing the tripping tweezers in the state of energy storage, and releasing the limit of closing the tripping tweezers in the closed state.
  • the existing closing trip device can be divided into two types by different structures of the closing latch, such as the closing brake module disclosed in the Chinese patent document 201220001606.3, the new spring operating mechanism, and the other such as Chinese patent document 201220735252.5, the opening and closing device disclosed in the spring operating mechanism.
  • the closing latch is a rotating latch that is mounted on the frame, and the latch arm of one end of the latch is matched with the roller on the closing tripper, and the other end is combined.
  • the tripping member attached to the brake electromagnet is matched.
  • the closing latch is a closing half shaft that is rotatably mounted on the frame, and one end of the closing half shaft is provided with a half shaft structure matched with the closing tripping tweezers, and the other end is provided There is a closing latch swing arm that cooperates with a fixed V-shaped arm and a closing electromagnet on the manually operated shaft.
  • an isolated circuit breaker is required to replace the existing common circuit breaker in the high voltage line, and the difference between the contact system of the isolated circuit breaker and the ordinary circuit breaker is mainly:
  • the isolated circuit breaker needs to be equipped with a mechanical isolation locking device to ensure the correct locking and closing action and mechanical locking function.
  • the locking function of the existing isolated circuit breaker is to realize the locking in the transmission system of the circuit breaker, and has no connection with the operating mechanism; if the locking device is used to lock a certain part of the isolating circuit breaker body, although the body driving lock is realized Buckle, but the closing latch of the mechanism is not limited.
  • the latching device comprises a rigid latching member for movably mounting on the trip bracket for blocking and avoiding in the direction in which the latch swing arm unlocking position is swung when the latch swing arm is in the lock position, on the latching member A force applying structure for switching the blocking and escaping of the latching arm to the latching arm is provided.
  • the latching member is a latching pin for movably guiding the mounting on the trip bracket in the direction of the rotational axis of the latch, and the biasing structure is a thrusting structure for axially withdrawing along the latching pin shaft.
  • the thrusting structure includes a force swinging arm for rotating and mounting on the trip bracket and a connecting rod bridging between the force swinging arm and the latching pin, the force swinging arm having a spatially perpendicular arrangement with the axis of rotation of the latch.
  • the axis of rotation, the force swing arm, the connecting rod and the latching pin form a crank slider mechanism on the trip bracket.
  • the urging arm is fixed on the outer circumference of the urging shaft, and is provided at the periphery of the urging arm for preventing the urging arm from continuing to push and lock after the latching pin is pushed to the position of the latching arm.
  • a latching stop that swings in the direction of the pin.
  • the locking limiter is a travel switch spaced apart from the periphery of the force swing arm, and a control cam matched with the lock stroke switch is fixed on the force applying shaft, and the control cam is spaced apart from the force swing arm and is disposed on the lock limiter.
  • a force-applying motor for closing when the control cam touches the latching limiter is electrically connected to the control device, and the output end of the force-applying motor is connected to the force-applying shaft.
  • the operating mechanism comprises a frame and a tweezers and a tripping device assembled thereon, and the tripping device comprises a tripping bracket fixed or integrally arranged on the frame, and the tripping bracket is mounted on the parallel axis and is equipped with a tweezers And a latch for releasing the limit of the latch under the action of the operating rod or the electromagnet, the latch is fixedly or integrally provided with a radially overhanging latch arm along the axis of rotation, the latch arm
  • the limit positions on the two sides of the swinging stroke on the trip bracket are respectively corresponding to the locking position when the latch is pressed against the latch to limit the latch to the latch, and is used for the latch to be actuated.
  • the lever or the electromagnet is pushed up to release the unlocking position of the limit of the latch, and the trip bracket is further equipped with a locking device, and the locking device comprises a movable assembly on the trip bracket for locking the arm in the latching position
  • the rigid latching member can be blocked and evaded in the direction in which the latching arm unlocking position is swung, and is provided on the trip bracket for preventing the latching member from swinging from the latching arm when the latching member blocks the latching arm
  • the upper release structure is provided on the lock member for switching the lock member to the latch swing arm Urging the stopper and the relief structure.
  • the latching member is movably guided to the latching pin shaft mounted on the trip bracket in the direction of the rotation axis of the latch, and the retaining structure comprises a support wall fixedly or integrally provided on the trip bracket, and the support wall is provided with a latching pin on the support wall
  • the force applying structure is a thrusting structure for axially withdrawing along the latching pin.
  • the thrusting structure includes a urging arm mounted on the trip bracket and bridged between the force swing arm and the latch pin
  • the connecting rod, the rotating axis of the force swinging arm and the rotating axis of the latch are vertically arranged in a staggered manner, and the force swinging arm, the connecting rod and the locking pin form a crank slider mechanism on the trip bracket.
  • the urging arm is fixed on the outer circumference of the urging shaft, and is provided at the periphery of the urging arm for preventing the urging arm from continuing to push and lock after the latching pin is pushed to the position of the latching arm.
  • a locking limiter that swings in the direction of the pin, and the latching limiter is fixed on the trip bracket.
  • the locking limiter is a travel switch spaced apart from the periphery of the force swing arm, and a control cam matched with the lock stroke switch is fixed on the force applying shaft, and the control cam is spaced apart from the force swing arm and is disposed on the lock limiter.
  • a force-applying motor for closing when the control cam touches the latching limiter is electrically connected to the control device, and the output end of the force-applying motor is connected to the force-applying shaft.
  • the trip bracket of the trip device of the present invention is movably fitted with a rigid latching member for blocking and avoiding in the direction in which the latch swing arm is in the locked position when the latch swing arm is in the lock position, and is off
  • the buckle bracket is provided with a stop structure for preventing the latching member from being disengaged from the latch swing arm when the latch member blocks the latch swing arm
  • the latching member is provided with a stop member for switching the latching member to the latch swing arm And the evasive force structure.
  • the locking member can move to a position that blocks the latch swing arm to block the latch from moving toward the unlocking position, and the stop structure ensures that the latch is stable and reliable to the latch.
  • the rigid stop so that when the electromagnet or the operating lever of the operating mechanism is accidentally touched, the latch swing arm is blocked by the latching member without rotating the latch, thereby avoiding the latch being released when the latch is accidentally touched.
  • a limit position when the lock member needs to be rotated to the unlocking position, the lock member can be moved to avoid the position of the swing arm, and the limit of the lock arm to the lock arm can be released, so that the lock arm can be Rotate to the unlocking position to facilitate the normal operation of the operating mechanism. Therefore, in the lock position of the utility model, the latching arm can be blocked and avoided by the latching member to realize the limit and avoidance of the latch swing arm, and the swing arm swings at the latch.
  • the front insurance function increases the anti-missing function of the trip device during use, ensures the idle safety of the trip device, and also plays a locking function for the maintenance of the split and closing actions of the entire operating mechanism.
  • FIG. 1 is a schematic perspective structural view of an embodiment of an operating mechanism of the present invention
  • Figure 2 is a perspective view showing the three-dimensional structure of the closing and tripping device of Figure 1 in a locked state
  • Figure 3 is a perspective view showing the three-dimensional structure of the closing and tripping device of Figure 1 in an unlocked state
  • Figure 6 is a perspective view showing the structure of the locking device of Figure 2;
  • Figure 7 is a perspective view showing the locking device of Figure 2 in another perspective view
  • Figure 8 is a front elevational view of Figure 7;
  • Figure 9 is a schematic view showing the circuit principle of the operating mechanism of Figure 1 in a closed state
  • Figure 10 is a schematic view showing the circuit principle of the latching device of Figure 1 in an open state.
  • the operating mechanism is a spring operating mechanism of an isolated circuit breaker with a closing and locking function, which is mainly provided by the frame and the upper thereof.
  • the improvement of the operating mechanism in this embodiment lies in the closing trip device 5, and the structure of the other devices belongs to the prior art.
  • the closing trip device 5 is composed of a closing tripping mechanism and a locking device.
  • the closing tripping mechanism is composed of a main body bracket 511 fixed on the frame and a closing detent 512, a closing latch 513 and a closing electromagnet 514 which are disposed from right to left in sequence, and the closing dice 512 and closing
  • the latch 513 is rotatably mounted on the front side of the trip bracket by rotating shafts parallel to each other and extending forward and backward.
  • the closing latch 512 is a pendulum structure in which the upper end is connected to the main body bracket 511, and the closing latch 513 is connected to the main body in the middle.
  • the locking device is a locking device for closing and locking the spring operating mechanism of the isolated circuit breaker, and is mainly composed of a locking member, a connecting rod 523, a force applying arm, a biasing shaft 521, a control cam, and a force supporting bracket 5211.
  • the position member, the force applying motor and the auxiliary switch 5212 are configured, wherein the locking member is a locking pin shaft 524 which is assembled on the closing machine base 518 disposed under the right force applying arm, and the force applying bracket 5211 is fixed on the frame.
  • the biasing shaft 521 is rotatably mounted on the right and left extending axis on the force applying bracket 5211, and the biasing arm is a driving arm 529 fixed on the outer circumference of the biasing shaft 521, and the connecting rod 523
  • the front end is hinged to the rear end of the lock pin 524 and the rear end is hinged to the convex portion of the drive arm 529.
  • the control cam is a control cam 5210 fixed on the outer circumference of the force applying shaft 521 and on the left side of the drive arm 529.
  • the urging motor 527 is connected to the right end of the urging shaft 521 through a transmission mechanism.
  • the auxiliary switch 5212 is connected to the left end of the urging shaft 521 by a flange transmission, and the limiting member is a locking stroke switch 522 after the urging shaft 521. In the unlocking limit switch before urging the shaft 5215213.
  • the main body bracket 511 and the force applying bracket 5211 form a closing trip bracket for providing a mounting position for the entire closing trip device on the frame, and the locking pin shaft 524, the connecting rod and the driving arm are in the closing trip bracket.
  • a crank slider mechanism is formed on the upper.
  • the lower end of the closing latch 512 is restrained by the right latching arm 5132 of the closing latch 513 to maintain the retaining pin 516 protruding from the rear end of the energy storage ratchet 515.
  • 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 such that the right latch swing arm 5132 of the closing latch 513 is at
  • the upper pendulum stroke limit position maintains the limit of the closing pawl 512, that is, the left latch swing arm 5131 and the right latch swing arm 5132 of the closing latch 513 are at the closing position of the swing stroke at this time.
  • the latch 513 is pressed against the closing shovel 512 to close the switch
  • the latching pin 524 will be below the right latching arm 5132 and block the right latching arm 5132 from swinging downward;
  • the latching pin 524 needs to be pulled forward first, so that the latching pin 524 of the closing latch 513 is swayed upward by the tripping member 5141 after the latching pin 524 is prevented from the right latching arm 5132. Go to the upper limit position and drive the right latch swing arm 5132 to swing down to the lower limit position.
  • the closing frame 518 is mainly composed of a fixing portion fixed on the main body bracket 511 and two vertical walls which are spaced apart from each other.
  • the two vertical walls are integrally disposed on the right side of the fixing portion and are suspended to the right, and the upper sides of the two standing walls are The left and right are gradually tilted upwards, and the front and rear extending guide holes are opened on the right side of the two vertical walls.
  • the guide holes on the two vertical walls are oppositely arranged in pairs, and the guide holes are arranged in two pairs and arranged up and down.
  • the two standing walls are respectively spaced apart at the front and rear side positions of the right latch swing arm 5132 so as to be inserted into the hole wall of the guide perforation inserted through the lock pin shaft 524 when the lock pin shaft 524 is inserted under the right latch swing arm 5132.
  • the front and rear supports are provided for the latching pin 524, i.e., the portion of the latching wall surface of the latching pin 524 that faces away from the right latching arm 5132 forms a support surface that blocks the latching pin 524, the two walls forming
  • the latching pin 524 blocks the right latching arm 5132 from the retaining structure that prevents the latching pin 524 from disengaging from the right latching arm 5132.
  • the connecting rod 523, the urging arm, the urging shaft 521, and the urging motor 527 are formed on the front side of the latching pin 524 to realize the switching of the latching pin 524 to the right latching arm by means of front and rear latching of the latching pin 524. 5132's urging structure for stopping and avoiding.
  • the urging 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, and the left vertical plate and the right vertical plate are respectively supported at positions of the left and right ends of the urging shaft 521, And the limiting shoulders on the opposite sides of the left vertical plate and the right vertical plate are respectively protruded at the left and right ends of the biasing shaft 521.
  • the right end of the urging shaft 521 is passed through the right vertical plate, and a padlock indicating plate 528 indicating the forward and backward swinging position of the driving arm 529 is connected to the passing portion.
  • the urging motor 527 is fixed at a position on the right side of the right vertical plate above the urging shaft 521, the output shaft of the urging motor 527 passes through the upper vertical plate, and the through-out portion of the output shaft passes through the single-stage gear transmission mechanism.
  • the driving gear 525 connected to the output shaft in the single-stage gear transmission mechanism is larger than the driven gear 526 connected to the urging shaft 521.
  • the drive arm 529 is on the left side of the driven gear 526.
  • the lock stroke switch 522 and the unlock stroke switch 5213 are both fixed on the right side surface of the left vertical plate, and the contact portions of the lock stroke switch 522 and the unlock stroke switch 5213 are arranged back and forth.
  • the control cam 5210 is at a position between the lock stroke switch 522 and the unlock stroke switch 5213.
  • the auxiliary switch 5212 is on the left side of the left vertical plate and is fixed to the left side edge of the bottom plate by a mounting seat provided on the right side thereof.
  • the closing electromagnet 514 After receiving the closing command, the closing electromagnet 514 is energized and starts to be excited, and the ram on the closing electromagnet 514 is subjected to electromagnetic force, and moves with the tripping member 5141 toward the closing latch 513 ⁇ when the ram and the tripping member After reaching a certain speed, the 5141 impacts the collision surface of the left latch swing arm 5131 of the closing latch 513. After the impact latch 513 receives the impact force, the original lock balance of the closing latch 513 is broken, so that the balance of the lock latch 513 is broken.
  • the closing latch 513 rotates clockwise (when the closing latch 513 is rotated clockwise, the closing trip has been achieved) ⁇ since the closing latch 513 rotates clockwise, the closing scorpion is no longer closed
  • the closing switch 512 also rotates clockwise, and the ratchet 515 is no longer limited.
  • the ratchet 515 rotates counterclockwise with the cam 5210 shaft and the cam 5210 to realize the closing operation.
  • the working principle of the locking device in the closing trip device is as follows:
  • the limit pin 5133 of the isolation locking device is placed under the right end of the closing latch 513, and the closing latch 513 is restricted to move clockwise, thereby maintaining the state of the closing lock and allowing the circuit to be broken.
  • the device cannot be closed at all, so that the isolation circuit breaker is locked in the open position state.
  • the control cam 5210 presses the latching stroke switch 522 ⁇ because the latching stroke switch 522 is pressed
  • the contact in the latching loop becomes a normally open contact, and the latching loop is de-energized (at the same time, the unlocking stroke switch 5213 of the unlocking loop is not pressed, and the contact in the unlocking loop becomes a normally closed contact; the auxiliary switch After the 5212 is rotated to the locked position, the auxiliary switch 5212 is turned on to perform signal output.)
  • the latching loop Since the latching loop is de-energized, the latching contactor loses power, which is in the control circuit. The contact opens, causing the motor 527 to stop ⁇ the blocking action ends;
  • the unlocking circuit After the unlocking circuit receives the unlocking command in the control circuit of the TRI motor 527, the latching contactor in the unlocking circuit is energized, and the contact in the circuit of the motor 527 is sucked, so that the urging motor 527 is charged in reverse rotation ⁇ through The single-stage gear mechanism is driven, and the force-applying shaft 521 is reversely rotated.
  • the transmission arm 529 is reversely rotated along with the force-applying shaft 521.
  • the belt is driven by the connecting rod 523, and the latching pin 524 is withdrawn from the closing tripping mechanism, and the closing is no longer restricted.
  • the right latch swing arm 5132 of the latch 513 is swung down ⁇ when the latch pin 524 is moved to the unlocked position, the control cam 5210 presses the unlock stroke switch 5213 ⁇ due to the unlock stroke
  • the closing 5213 is pressed, its contact in the unlocking circuit becomes a normally open contact, and the unlocking circuit is de-energized (at the same time, the blocking stroke switch 522 of the blocking circuit is not pressed, and the contact in the locking circuit becomes normally closed)
  • the auxiliary switch 5212 is also rotated to the unlocked position by the biasing shaft 521, and the auxiliary switch 5212 is contacted to perform signal output.) ⁇ Since the unlocking circuit is de-energized, the unlocking contactor is de-energized, and its control circuit is in the control circuit. The contact opens to stop the motor 527 ⁇ the unlocking action ends.
  • the locking device can be directly mounted on the spring operating mechanism of the ordinary circuit breaker, without modifying the structure of the spring operating mechanism, and inserting the closing shaft pin of the spring operating mechanism through the locking shaft pin on the locking device, The movement of the closure latch 513 is restricted to achieve mechanical latching of the isolated circuit breaker.
  • the isolation locking system realized by the locking device has the advantages of reliability, safety, integration, high versatility, etc., and can reliably ensure that the isolated circuit breaker is locked at the opening position to achieve position locking.
  • 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 Closing action motor, SBT5-circuit breaker spring operating mechanism closing switch, SBT10-locking device closing switch, S3-locking device closing and closing state signal output auxiliary switch, S1-circuit breaker spring operating mechanism Closing state signal output auxiliary switch, SP1-circuit breaker spring operating mechanism spring storage energy control stroke switch, SP3-locking device closing control stroke switch, SP4-locking device opening control stroke switch, YC-circuit breaker spring operation
  • the moving mechanism closes the electromagnet coil, the X-mechanism internal terminal block, the X1-locking device opening status signal indicator, and the X2-locking device closing status signal indicator.
  • the circuit breaker When the circuit breaker needs to be repaired, the circuit breaker is opened for maintenance, in order to avoid the vibration caused by natural causes such as earthquakes, the manual of human error, and the closing of the spring operating mechanism of the circuit breaker caused by improper secondary or short-circuit operation.
  • the action of the electromagnet causes the circuit breaker spring operating mechanism to close the circuit breaker to electrify the circuit breaker and injure the maintenance personnel. Therefore, it is necessary to put in the circuit breaker spring operating mechanism closing and locking device to mechanically ensure that the circuit breaker spring operating mechanism does not close. .
  • the spring operating mechanism must be in the spring storage state (the spring does not have energy storage, and there is no need to close the lock).
  • the spring action mechanism of the circuit breaker springs the energy storage control switch SP1 to close, and the operation lock device is closed.
  • the brake transfer switch SBT10 is closed, the locking device motor closing contactor KM1 coil is energized, the locking device motor closing contactor KM1 contact 13-14 is sucked and held, the locking device is closed, the closing circuit is continuously energized, and the locking device motor closing contactor
  • the contacts 1-2, 3-4, and 5-6 of the KM1 are also closed, so that the contact 1 of the closing device of the closing device is positively rotated positively, and the locking pin 524 is mechanically transmitted by the locking device.
  • Point and closed point cut Change so that the blocking device opening state signal indicator light X1 is powered off and extinguished, the locking device closing state signal indicator light X2 is energized and brightened, and at the same time, the circuit breaker spring operating mechanism closing control circuit is connected to the locking device to close and close the closing state signal.
  • the contact 17-18 of the output auxiliary switch S3 is disconnected, so that the state of the closing control circuit and the locking device of the circuit breaker spring operating mechanism are interlocked, and the breaking is realized, and the closing cannot be performed. Due to the sudden loss of power of the locking device motor M1, the internal product reverses the electromotive force, and the reverse current generated through the brake circuit reverses the motor to achieve braking.
  • the locking device opening control switch SP4 is closed, 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 closing and closing operation motor M1 is positively charged, and the reverse rotation is realized to open the locking device.
  • the urging structure is composed of a driving slider mechanism and an electric device.
  • the electric device can also be replaced by a manual driving device, and the crank slider mechanism can also be driven by an electric push rod mechanism or the like. The agency either directly pushes the push-pull structure instead.
  • the latching pin blocks the lower side of the right latch swing arm.
  • the latching pin can also be blocked above the left latch swing arm, and when the latch has a half shaft configuration
  • the latching pin needs to be blocked on the side of the latching arm that faces away from the arm of the operating shaft or the ram of the electromagnet so that the latching pin can be placed in the latch when the latching arm is in the locking position
  • the arm unlocks the position in the direction of the swing and stops.
  • the latching member is a latching latch that is inserted into the latching trip bracket.
  • the latching latch can also be replaced by a latching half shaft, a latching crankshaft or a latching swing arm, wherein the latching axle is blocked.
  • the locking crankshaft is axially mounted on the closing trip bracket, and the solid part of the closing half shaft and the locking crankshaft can be in contact with the latch swing arm to realize the blocking of the latch swing arm, the groove portion and the latch
  • the latch swing arm can be avoided; the lock swing arm can swing to the position of the lock latch swing arm when the latch swing arm needs to be blocked, and swing to other positions when the latch swing arm needs to be avoided.
  • the locking device is used on the closing and tripping device.
  • the above-mentioned locking device can also be assembled on the opening and closing device, or the locking device can be assembled in the opening and closing device. Device.
  • the embodiment of the locking device of the present invention the structure of the locking device in the present embodiment is the same as that of the locking device in the above embodiment, and therefore will not be described again.

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Abstract

一种操动机构及其闭锁装置。闭锁装置的刚性的闭锁件活动装配在脱扣支架上而用于在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让，并在脱扣支架上设有用于在闭锁件挡止锁闩摆臂时阻止闭锁件从锁闩摆臂上脱开的止脱结构，在闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。锁闩在锁止位时，可通过闭锁件对锁闩摆臂的挡止和避开，来实现对锁闩摆臂的限位和避让，起到在锁闩摆臂摆动前的保险作用，从而增加了脱扣装置在使用过程中的防误触功能，保证了脱扣装置的闲置安全性，也对整个操动机构的分、合闸动作的保持起到了锁定功能。

Description

操动机构及其闭锁装置 技术领域
本发明涉及一种操动机构及其闭锁装置。
背景技术
目前，普通断路器的操动机构中合闸脱扣装置主要由合闸脱扣掣子、合闸锁闩和合闸电磁铁构成，合闸锁闩的锁闩摆臂通过合闸电磁铁的顶推而在机架上转动，以实现在储能保持状态下对合闸脱扣掣子限位、在合闸状态下解除对合闸脱扣掣子的限位。而现有的合闸脱扣装置由合闸锁闩的不同结构可分为两种，一种如中国专利文献201220001606.3、新型弹簧操动机构中公开的合闸脱扣器模块，另一种如中国专利文献201220735252.5、弹簧操动机构中公开的分合闸装置。前一种合闸脱扣装置中合闸锁闩为转动装配在机架上的保持掣子，保持掣子的一端锁闩摆臂与合闸脱扣掣子上的滚轮配合、另一端与合闸电磁铁上固连的脱扣件配合。后一种合闸脱扣装置中合闸锁闩为转动装配在机架上的合闸半轴，合闸半轴的一端设有与合闸脱扣掣子配合的半轴结构、另一端设有与手动操作轴上固定的V形拐臂和合闸电磁铁配合的合闸锁闩摆臂。
而为了保证断路器能够可靠地闭锁在分闸位置，在高压线路中需要采用隔离式断路器来替代现有的普通断路器，而隔离式断路器的接触系统和普通断路器的区别主要在于，隔离式断路器需要配备机械性的隔离闭锁装置，以保证正确分、合闸动作的同时有机械闭锁功能。现有隔离式断路器的闭锁功能是在断路器的传动系统中实现闭锁的，和操动机构没有联系；如果采用对隔离断路器本体传动某部位进行锁扣的方案，虽然实现了本体传动锁扣，但是机构的合闸锁闩没有进行限位，在合闸电磁铁的按钮受到异常的撞击、振动或者意外的触碰后，合闸锁闩还是会向让开合闸脱扣掣子的方向旋转，造成合闸脱扣，储能轮在弹簧的带动下带着输出凸轮稍微旋转一定角度，此时，由于对隔离断路器本体传动某部位进行了锁扣，隔离断路器虽然没有立即进行合闸，但是弹簧操动机构的合闸脱扣掣子已经脱扣，输出凸轮的间隙尺寸已被破坏，一旦断路器本体中闭锁装置闭锁功能解除，隔离式断路器会立即、骤然进行合闸动作，以致隔离式断路器的合闸动作过快而致合闸特性不能满足技术要求，使得隔离式断路器的合闸动作存在较大的安全隐患。
发明内容
本发明的目的是提供一种避免脱扣装置的电磁铁或手动操作轴被误操作时、锁闩向让开脱扣掣子方向旋转的闭锁装置，同时还提供了一种使用该闭锁装置的操动机构。
为了实现以上目的，本发明中脱扣装置的技术方案如下：
闭锁装置，包括用于活动装配在脱扣支架上、以在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让的刚性的闭锁件，闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。
闭锁件为用于沿锁闩的转动轴线方向活动导向装配在脱扣支架上的闭锁销轴，施力结构为用于沿闭锁销轴轴向抽插的抽插结构。
抽插结构包括用于转动装配在脱扣支架上的施力摆臂及桥接在施力摆臂和闭锁销轴之间的连杆，施力摆臂具有和锁闩的转动轴线空间垂直交错布置的转动轴线，施力摆臂、连杆和闭锁销轴在脱扣支架上形成曲柄滑块机构。
施力摆臂固定在施力转轴的外周上，并在施力摆臂的外围设有用于在闭锁销轴被推动到挡止锁闩摆臂的位置后、阻止施力摆臂继续向推动闭锁销轴的方向摆动的闭锁限位件。
闭锁限位件为间隔设置在施力摆臂外围的行程开关，施力转轴上还固定有与闭锁行程开关配合的控制凸轮，控制凸轮与施力摆臂间隔设置，并在闭锁限位件上通过控制装置电连接有用于在控制凸轮碰触闭锁限位件时关闭的施力电机，施力电机的输出端传动连接在施力转轴上。
本实用新型中操动机构的技术方案如下：
操动机构，包括机架及其上装配的掣子、脱扣装置，脱扣装置包括固定或一体设置在机架上的脱扣支架，脱扣支架上绕相互平行的轴线转动装配有掣子及用于在操动杆或电磁铁的作用下解除对掣子的限位的锁闩，锁闩上固定或一体设置有沿转动轴线的径向悬伸的锁闩摆臂，锁闩摆臂在脱扣支架上的摆动行程的两侧极限位分别为用于在锁闩顶压在掣子上而使掣子被锁闩限位时对应的锁止位、用于在锁闩被操动杆或电磁铁顶推而解除对掣子的限位的解锁位，脱扣支架上还装配有闭锁装置，闭锁装置包括活动装配在脱扣支架上的用于在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让的刚性的闭锁件，并在脱扣支架上设有用于在闭锁件挡止锁闩摆臂时阻止闭锁件从锁闩摆臂上脱开的止脱结构，在闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。
闭锁件为沿锁闩的转动轴线方向活动导向装配在脱扣支架上的闭锁销轴，止脱结构包括固定或一体设置在脱扣支架上的支撑壁，支撑壁上设有用于在闭锁销轴挡止锁闩摆臂时挡止在闭锁销轴背向锁闩摆臂的一侧的支撑面；施力结构为用于沿闭锁销轴轴向抽插的抽插结构。
抽插结构包括转动装配在脱扣支架上的施力摆臂及桥接在施力摆臂和闭锁销轴之间 的连杆，施力摆臂的转动轴线和锁闩的转动轴线空间垂直交错布置，施力摆臂、连杆和闭锁销轴在脱扣支架上形成曲柄滑块机构。
施力摆臂固定在施力转轴的外周上，并在施力摆臂的外围设有用于在闭锁销轴被推动到挡止锁闩摆臂的位置后、阻止施力摆臂继续向推动闭锁销轴的方向摆动的闭锁限位件，闭锁限位件固定在脱扣支架上。
闭锁限位件为间隔设置在施力摆臂外围的行程开关，施力转轴上还固定有与闭锁行程开关配合的控制凸轮，控制凸轮与施力摆臂间隔设置，并在闭锁限位件上通过控制装置电连接有用于在控制凸轮碰触闭锁限位件时关闭的施力电机，施力电机的输出端传动连接在施力转轴上。
本发明中脱扣装置的脱扣支架上活动装配有用于在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让的刚性的闭锁件，并在脱扣支架上设有用于在闭锁件挡止锁闩摆臂时阻止闭锁件从锁闩摆臂上脱开的止脱结构，在闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。在使用时，当锁闩处于锁止位后，闭锁件可活动到对锁闩摆臂挡止的位置，以阻挡锁闩向解锁位运动，且止脱结构可保证闭锁件对锁闩稳定可靠的刚性挡止，这样在操动机构的电磁铁或操动杆被误触时，锁闩摆臂被闭锁件阻挡而不会使得锁闩转动，从而避免了误触时锁闩解除对掣子限位的情况；而当闭锁件需要向解锁位转动时，闭锁件又可以活动到避开锁闩摆臂的位置，解除闭锁件对锁闩摆臂的限位，以使锁闩摆臂可向解锁位转动，便于操动机构进行正常的操动动作。因此本实用新型中锁闩在锁止位时，可通过闭锁件对锁闩摆臂的挡止和避开，来实现对锁闩摆臂的限位和避让，起到在锁闩摆臂摆动前的保险作用，从而增加了脱扣装置在使用过程中的防误触功能，保证了脱扣装置的闲置安全性，也对整个操动机构的分、合闸动作的保持起到了锁定功能。
附图说明
图1是本发明的操动机构的实施例的立体结构示意图；
图2是图1中合闸脱扣装置在闭锁状态下的立体结构示意图；
图3是图1中合闸脱扣装置在解锁状态下的立体结构示意图；
图4是图2中合闸脱扣机构的立体结构示意图；
图5是图4中合闸脱扣机构的工作原理示意图；
图6是图2中闭锁装置的立体结构示意图；
图7是图2中闭锁装置在另一视角下的立体结构示意图；
图8是图7的主视图；
图9是图1中操动机构在合闸状态下的电路原理示意图；
图10是图1中闭锁装置在分闸状态下的电路原理示意图。
具体实施方式
本发明中操动机构的实施例：如图1至图8所示，该操动机构是一种具有合闸闭锁功能的隔离式断路器的弹簧操动机构，主要由机架及其上设置的电动储能装置1、合闸储能装置2、合闸脱扣装置3、分闸储能装置4、分闸脱扣装置5、辅助开关信号输出装置6和分合闸输出装置7构成，本实施例中操动机构的改进在于合闸脱扣装置5，其他装置的结构均属于现有技术。合闸脱扣装置5由合闸脱扣机构和闭锁装置两部分构成。合闸脱扣机构由固定在机架上的主体支架511及其上从右向左依次设置的合闸掣子512、合闸锁闩513和合闸电磁铁514构成，合闸掣子512和合闸锁闩513通过相互平行且前后延伸的转轴转动装配在脱扣支架的前侧面上，合闸掣子512是上端连接在主体支架511上的单摆结构，合闸锁闩513是中部连接在主体支架511上的左右延伸的杠杆结构，合闸锁闩513的两端分别一体设置有左锁闩摆臂5131和右锁闩摆臂5132，而合闸电磁铁514的上端固定有与左锁闩摆臂5131配合的脱扣件5141。闭锁装置为可实现隔离式断路器的弹簧操动机构合闸闭锁的闭锁装置，其主要由闭锁件、连杆523、施力摆臂、施力转轴521、控制凸轮、施力支架5211、限位件、施力电机、辅助开关5212构成，其中闭锁件为前后活动导向装配在右施力摆臂下方设置的合闸机座518上的闭锁销轴524，施力支架5211固定在机架上于主体支架511之前的位置处，施力转轴521绕左右延伸的轴线转动装配在施力支架5211上，施力摆臂为固定在施力转轴521的外周上的传动拐臂529，连杆523的前端铰接在闭锁销轴524的后端、后端铰接在传动拐臂529的凸起部分上，控制凸轮为固定在施力转轴521的外周上并处于传动拐臂529左侧的控制凸轮5210，施力电机527通过传动机构传动连接在施力转轴521的右端，辅助开关5212通过法兰传动连接在施力转轴521的左端，限位件为处于施力转轴521之后的闭锁行程开关522和处于施力转轴521之前的解锁行程开关5213。主体支架511和施力支架5211在机架上形成了为整个合闸脱扣装置提供安装位的合闸脱扣支架，而使闭锁销轴524、连杆和传动拐臂在合闸脱扣支架上形成了曲柄滑块机构。这样，在操动机构处于合闸保持状态时，合闸掣子512的下端被合闸锁闩513的右锁闩摆臂5132限位而保持与储能棘轮515后端凸设的保持销516止脱连接，合闸锁闩513的右锁闩摆臂5132被挡止在主体支架511上固定的限位销轴5133的下侧，以使合闸锁闩513的右锁闩摆臂5132处于上侧的单摆行程极限位而保持对合闸掣子512的限位，即合闸锁闩513的左锁闩摆臂5131和右锁闩摆臂5132此时的摆动行程极限位置为合闸锁闩513顶压在合闸掣子512上而使合闸 掣子512被合闸锁闩513限位时对应的锁止位，同时，闭锁销轴524会处于右锁闩摆臂5132的下方、并挡止右锁闩摆臂5132向下摆动；当需要合闸时，需要先向前抽动闭锁销轴524，使得闭锁销轴524避开右锁闩摆臂5132后，合闸锁闩513的左锁闩摆臂5131被脱扣件5141向上撞击而摆动到上侧极限位，并带动右锁闩摆臂5132会向下摆动到下侧极限位，右锁闩摆臂5132会解除对合闸掣子512的限位，使得合闸掣子512可从保持销516上脱开，而此时合闸锁闩513的左锁闩摆臂5131和右锁闩摆臂5132的摆动行程极限位置为在合闸锁闩513被电磁铁顶推而解除对合闸掣子512的限位的解锁位。从而使得合闸机座518主要由固定在主体支架511的上的固定部及前后间隔设置的两立壁构成，两立壁一体设置在固定部的右侧并向右悬伸，两立壁的上侧从左向右逐渐向上翘起，并在两立壁的右侧翘起部位上开设有前后延伸的导向穿孔，两立壁上的导向穿孔前后相对的成对设置，导向穿孔有两对并上下相错布置在两立壁上。两立壁分别间隔设置在右锁闩摆臂5132的前后侧位置处，以在闭锁销轴524前插到右锁闩摆臂5132的下方时，通过闭锁销轴524所插入的导向穿孔的孔壁面为闭锁销轴524提供前后支撑，即导向穿孔的孔壁面的位于闭锁销轴524的背向右锁闩摆臂5132的部分形成了挡止闭锁销轴524的支撑面，该两立壁形成了在闭锁销轴524挡止右锁闩摆臂5132时阻止闭锁销轴524从右锁闩摆臂5132上脱开的止脱结构。连杆523、施力摆臂、施力转轴521、施力电机527在闭锁销轴524的前侧形成了通过前后抽插闭锁销轴524的方式实现切换闭锁销轴524对右锁闩摆臂5132的挡止和避让的施力结构。
施力支架5211主要由固定在机架上的底板及立设在底板上的左立板和右立板构成，左立板和右立板分别支撑在施力转轴521的左右两端位置处，并在施力转轴521的左右两端分别凸设有挡止在左立板和右立板的相对侧的限位凸肩。施力转轴521的右端从右立板中穿出，穿出部分上连接有指示传动拐臂529前后摆动位置的挂锁指示牌528。施力电机527固定在右立板的右侧于施力转轴521上方的位置处，施力电机527的输出轴从右立板的上穿过，输出轴的穿出部分通过单级齿轮传动机构连接在施力转轴521的外周上，单级齿轮传动机构中连接在输出轴上的主动齿轮525比连接在施力转轴521上的从动齿轮526大。传动拐臂529处于从动齿轮526的左侧。闭锁行程开关522和解锁行程开关5213均固定在左立板的右侧面上，且闭锁行程开关522和解锁行程开关5213的接触部位前后相对布置。控制凸轮5210处于闭锁行程开关522和解锁行程开关5213之间的位置处。辅助开关5212处于左立板的左侧，并通过其右侧设置的安装座固定在底板的左侧边缘上。
本实施例的操动机构的合闸脱扣装置中合闸脱扣机构的工作原理如下：
弹簧操动机构的储能弹簧517储能完毕→在储能弹簧517的拉力作用下，合簧拉杆向下运动 →合簧拉杆拉动储能棘轮515逆时针旋转→在储能棘轮515上安装的保持销516将压着合闸掣子512顺时针旋转→合闸掣子512上的脱扣磙子将压在合闸锁闩513的右锁闩摆臂5132上，使合闸锁闩513逆时针旋转→由于闭锁销轴524的限制，合闸锁闩513无法逆时针旋转，至此，实现合闸锁扣；
收到合闸命令后，合闸电磁铁514带电而开始励磁，合闸电磁铁514上的撞杆受到电磁力，带着脱扣件5141朝合闸锁闩513运动→当撞杆和脱扣件5141到达一定速度后，对合闸锁闩513的左锁闩摆臂5131碰撞面进行冲击→合闸锁闩513受到该冲击力后，破坏了合闸锁闩513原有的锁扣平衡，使合闸锁闩513顺时针旋转(当合闸锁闩513进行了顺时针旋转，至此就已实现了合闸脱扣)→由于合闸锁闩513顺时针旋转后，不再对合闸掣子512进行限位，合闸掣子512也顺时针旋转，不再对棘轮515进行限位→棘轮515带着凸轮5210轴和凸轮5210进行逆时针旋转，实现合闸操作。
合闸脱扣装置中闭锁装置的工作原理如下：
在合闸锁扣后，将隔离闭锁装置的限位销轴5133放到了合闸锁闩513的右端下面，限制合闸锁闩513顺时针运动，从而保持住了合闸锁扣状态，让断路器根本无法进行合闸，从而实现将隔离断路器闭锁在分闸位置状态。
施力电机527的控制电路中闭锁回路到闭锁命令后→闭锁回路中的闭锁接触器带电吸合，其在电机527回路中的触点吸合，使施力电机527带电旋转→通过单级齿轮机构传动，施力转轴521旋转→传动拐臂529跟着施力转轴521一起旋转→通过连杆523带动，闭锁销轴524在合闸机座518的直线导向作用下，进行前后直线运动，插入合闸脱扣机构中，限制合闸锁闩513的右锁闩摆臂5132下摆→当闭锁销轴524运动到闭锁位置时，控制凸轮5210压住闭锁行程开关522→由于闭锁行程开关522被压住，其在闭锁回路中的触点成为常开触点，闭锁回路失电(同时，解锁回路的解锁行程开关5213没有被压住，其在解锁回路中的触点成为常闭触点；辅助开关5212也跟着施力转轴521旋转到闭锁位置后，辅助开关5212触点接通，进行信号输出。)→由于闭锁回路失电，闭锁接触器失电，其在控制电路中的触点打开，使电机527停转→闭锁动作结束；
施力电机527的控制电路中解锁回路收到解锁命令后→解锁回路中的闭锁接触器带电吸合，其在电机527回路中的触点吸合，使施力电机527带电反向旋转→通过单级齿轮机构传动，施力转轴521反向旋转→传动拐臂529跟着施力转轴521一起反向旋转→通过连杆523带动，闭锁销轴524退出合闸脱扣机构，不再限制合闸锁闩513的右锁闩摆臂5132下摆→当闭锁销轴524运动到解锁位置时，控制凸轮5210压住解锁行程开关5213→由于解锁行程开 关5213被压住，其在解锁回路中的触点成为常开触点，解锁回路失电(同时，闭锁回路的闭锁行程开关522没有被压住，其在闭锁回路中的触点成为常闭触点；辅助开关5212也跟着施力转轴521旋转到解锁位置后，辅助开关5212触点接通，进行信号输出。)→由于解锁回路失电，解锁接触器失电，其在控制电路中的触点打开，使电机527停转→解锁动作结束。
本实施中闭锁装置可以直接安装在普通断路器的弹簧操动机构上，无需对弹簧操动机构的结构做改动，通过闭锁装置上的闭锁轴销插入弹簧操动机构的合闸机座518，限制合闸锁闩513的运动来实现对隔离式断路器的机械闭锁。该闭锁装置实现的隔离闭锁系统具有可靠性、安全性、集成性、通用性高等优点，能够可靠保证隔离式断路器闭锁在分闸位置，实现位置锁定。
如图9和图10所示，F1-断路器弹簧操动机构电源，F2-闭锁装置电源，KM1-闭锁装置电机合闸接触器，KM2-闭锁装置电机分闸接触器，M1-闭锁装置分合闸动作电机，SBT5-断路器弹簧操动机构合闸转换开关，SBT10-闭锁装置分合闸转换开关，S3-闭锁装置分合闸状态信号输出辅助开关，S1-断路器弹簧操动机构分合闸状态信号输出辅助开关，SP1-断路器弹簧操动机构合簧储能控制行程开关，SP3-闭锁装置合闸控制行程开关，SP4-闭锁装置分闸控制行程开关，YC-断路器弹簧操动机构合闸电磁铁线圈，X-机构内部端子排，X1-闭锁装置分闸状态信号指示灯，X2-闭锁装置合闸状态信号指示灯。
当断路器需要进行检修时，将断路器进行分闸后实施检修，为了避免地震等自然原因引起的振动、人为失误的手动以及二次短路或操动不当引起的断路器弹簧操动机构合闸电磁铁动作造成断路器弹簧操动机构合闸使断路器带电，伤及检修人员，因此需要投入断路器弹簧操动机构合闸闭锁装置，以机械性的保证断路器弹簧操动机构不会合闸。
首先，弹簧操动机构必须是合簧储能状态(合簧没有储能，也没有必要进行合闸闭锁)，断路器弹簧操动机构合簧储能控制行程开关SP1闭合，操作闭锁装置分合闸转换开关SBT10合闸，闭锁装置电机合闸接触器KM1线圈带电，闭锁装置电机合闸接触器KM1的触点13-14吸合保持闭锁装置合闸回路持续带电，闭锁装置电机合闸接触器KM1的触点1-2、3-4、5-6也闭合，使闭锁装置分合闸动作电机M1的触点1带正电正旋转，通过闭锁装置机械性的传动，使闭锁销轴524动作，限制断路器弹簧操动机构合闸；当闭锁销轴524动作到位时，控制凸轮5210推动闭锁装置合闸控制行程开关SP3断开切断闭锁装置合闸回路，闭锁装置电机合闸接触器KM1失电，其触点13-14、1-2、3-4、5-6断开，电机回路失电，并且施力转轴521转动闭锁装置分合闸状态信号输出辅助开关S3，使其开点和闭点切 换，使闭锁装置分闸状态信号指示灯X1断电熄灭，闭锁装置合闸状态信号指示灯X2通电发亮，同时，断路器弹簧操动机构合闸控制回路串入闭锁装置分合闸状态信号输出辅助开关S3的触点17-18断开，使断路器弹簧操动机构合闸控制回路和闭锁装置状态互锁，实现开断，无法合闸。由于闭锁装置分合闸动作电机M1突然失电，其内部产品反向电动势，通过刹车回路，产生的反向电流使电机反转，实现刹车。闭锁装置合闸后，闭锁装置分闸控制行程开关SP4闭合，此时可进行分闸操作。分闸操作二次回路原理与合闸回路一致，不同点仅在于闭锁装置分合闸动作电机M1的触点2带正电，实现反转使闭锁装置分闸。
在上述实施例中，施力结构由驱动滑块机构和电动装置构成，在其他实施例中，电动装置也可以用手动驱动装置替换，而曲柄滑块机构也可以用电动推杆机构等其他传动机构或直接推动推拉结构代替。
在上述实施例中，闭锁销轴挡止右锁闩摆臂的下方，在其他实施例中，闭锁销轴也可以挡止在左锁闩摆臂的上方，而在锁闩采用半轴结构时，闭锁销轴需挡止在锁闩摆臂背向操动轴的拐臂或电磁铁的撞杆的一侧，以使闭锁销轴在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让。
在上述实施例中，闭锁件是抽插装配在合闸脱扣支架上的闭锁插销，在其他实施中，该闭锁插销也可以用闭锁半轴、闭锁曲轴或闭锁摆臂替换，其中闭锁半轴和闭锁曲轴绕其轴向转动装配在合闸脱扣支架上，闭半轴和闭锁曲轴的实体部分可与锁闩摆臂接触而实现对锁闩摆臂的挡止、凹槽部分与锁闩摆臂配合时可实现避让锁闩摆臂；闭锁摆臂可在锁闩摆臂需要挡止时摆动到挡止锁闩摆臂的位置、在需要避让锁闩摆臂时摆动到其他位置。
在上述实施例中，闭锁装置被使用在合闸脱扣装置上，在其他实施例中，分闸脱扣装置上也可以装配上述闭锁装置，或者在分、合闸脱扣装置中均装配闭锁装置。
本发明的闭锁装置的实施例：本实施例中闭锁装置的结构与上述实施例中闭锁装置的结构相同，因此不再赘述。

Claims (10)

  1. 闭锁装置，其特征在于，包括用于活动装配在脱扣支架上、以在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让的刚性的闭锁件，闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。
  2. 根据权利要求1所述的闭锁装置，其特征在于，闭锁件为用于沿锁闩的转动轴线方向活动导向装配在脱扣支架上的闭锁销轴，施力结构为用于沿闭锁销轴轴向抽插的抽插结构。
  3. 根据权利要求2所述的闭锁装置，其特征在于，抽插结构包括用于转动装配在脱扣支架上的施力摆臂及桥接在施力摆臂和闭锁销轴之间的连杆，施力摆臂具有和锁闩的转动轴线空间垂直交错布置的转动轴线，施力摆臂、连杆和闭锁销轴在脱扣支架上形成曲柄滑块机构。
  4. 根据权利要求3所述的闭锁装置，其特征在于，施力摆臂固定在施力转轴的外周上，并在施力摆臂的外围设有用于在闭锁销轴被推动到挡止锁闩摆臂的位置后、阻止施力摆臂继续向推动闭锁销轴的方向摆动的闭锁限位件。
  5. 根据权利要求4所述的闭锁装置，其特征在于，闭锁限位件为间隔设置在施力摆臂外围的行程开关，施力转轴上还固定有与闭锁行程开关配合的控制凸轮，控制凸轮与施力摆臂间隔设置，并在闭锁限位件上通过控制装置电连接有用于在控制凸轮碰触闭锁限位件时关闭的施力电机，施力电机的输出端传动连接在施力转轴上。
  6. 操动机构，包括机架及其上装配的掣子、脱扣装置，脱扣装置包括固定或一体设置在机架上的脱扣支架，脱扣支架上绕相互平行的轴线转动装配有掣子及用于在操动杆或电磁铁的作用下解除对掣子的限位的锁闩，锁闩上固定或一体设置有沿转动轴线的径向悬伸的锁闩摆臂，锁闩摆臂在脱扣支架上的摆动行程的两侧极限位分别为用于在锁闩顶压在掣子上而使掣子被锁闩限位时对应的锁止位、用于在锁闩被操动杆或电磁铁顶推而解除对掣子的限位的解锁位，其特征在于，脱扣支架上还装配有闭锁装置，闭锁装置包括活动装配在脱扣支架上的用于在锁闩摆臂处于锁止位时可在锁闩摆臂解锁位摆动的方向上挡止和避让的刚性的闭锁件，并在脱扣支架上设有用于在闭锁件挡止锁闩摆臂时阻止闭锁件从锁闩摆臂上脱开的止脱结构，在闭锁件上设有用于切换闭锁件对锁闩摆臂的挡止和避让的施力结构。
  7. 根据权利要求6所述的操动机构，其特征在于，闭锁件为沿锁闩的转动轴线方向活动导向装配在脱扣支架上的闭锁销轴，止脱结构包括固定或一体设置在脱扣支架上的支撑壁，支撑壁上设有用于在闭锁销轴挡止锁闩摆臂时挡止在闭锁销轴背向锁闩摆臂的一侧的支撑面；施力结构为用于沿闭锁销轴轴向抽插的抽插结构。
  8. 根据权利要求7所述的操动机构，其特征在于，抽插结构包括转动装配在脱扣支架上的施力摆臂及桥接在施力摆臂和闭锁销轴之间的连杆，施力摆臂的转动轴线和锁闩的转动轴线 空间垂直交错布置，施力摆臂、连杆和闭锁销轴在脱扣支架上形成曲柄滑块机构。
  9. 根据权利要求8所述的操动机构，其特征在于，施力摆臂固定在施力转轴的外周上，并在施力摆臂的外围设有用于在闭锁销轴被推动到挡止锁闩摆臂的位置后、阻止施力摆臂继续向推动闭锁销轴的方向摆动的闭锁限位件，闭锁限位件固定在脱扣支架上。
  10. 根据权利要求9所述的操动机构，其特征在于，闭锁限位件为间隔设置在施力摆臂外围的行程开关，施力转轴上还固定有与闭锁行程开关配合的控制凸轮，控制凸轮与施力摆臂间隔设置，并在闭锁限位件上通过控制装置电连接有用于在控制凸轮碰触闭锁限位件时关闭的施力电机，施力电机的输出端传动连接在施力转轴上。
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