CN115285811A - Elevator brake release system - Google Patents

Elevator brake release system Download PDF

Info

Publication number
CN115285811A
CN115285811A CN202210910758.3A CN202210910758A CN115285811A CN 115285811 A CN115285811 A CN 115285811A CN 202210910758 A CN202210910758 A CN 202210910758A CN 115285811 A CN115285811 A CN 115285811A
Authority
CN
China
Prior art keywords
speed
elevator
brake
motor
module
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202210910758.3A
Other languages
Chinese (zh)
Inventor
王伟
常志斌
宋佳俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Youmai Heavy Industry Machinery Co ltd
Original Assignee
Zhejiang Youmai Heavy Industry Machinery Co ltd
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 Zhejiang Youmai Heavy Industry Machinery Co ltd filed Critical Zhejiang Youmai Heavy Industry Machinery Co ltd
Priority to CN202210910758.3A priority Critical patent/CN115285811A/en
Publication of CN115285811A publication Critical patent/CN115285811A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H02P3/22—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Elevator Control (AREA)

Abstract

The application relates to an elevator system that declutches, including electronic declutch gear and stopper, elevator system that declutches still includes module and the pressure regulating module that tests the speed, the output of electronic declutch gear via the pressure regulating module with the stopper is connected, wherein: the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the voltage regulating module; and the voltage regulating module is used for regulating the brake voltage output by the electric brake release device to the brake according to the real-time speed signal. Through this application, solved among the correlation technique host computer band-type brake and loosened back swift current car speed too fast, easily take place the accident and arouse passenger's in the car panic, lead to the relatively poor and safe problem inadequately of flat bed precision because of fast when stopping, easy operation, swift current car speed after the brake release is stable, and the flat bed precision is higher to the security that the passenger took the elevator and the experience of taking have been improved.

Description

Elevator brake release system
Technical Field
The application relates to the technical field of elevators, in particular to an elevator brake release system.
Background
The elevator brake release device is a brake release rescue device of an elevator and is used for scenes that a passenger is trapped in a car and the like when an elevator brake is stopped in a non-door area due to power failure or faults. With the development of economy, ultra-high-speed elevators have become more and more popular, but due to problems such as power failure, voltage instability, switch failure, control system failure, and the like, events such as passengers being trapped in the car have occurred.
In order to avoid the above situation, the related art elevator brake release device includes two types, i.e., a mechanical brake release type and an electric brake release type. The mechanical brake releasing mode is that a brake of a main machine is opened through tools such as a brake releasing wrench, a turning handwheel and the like, so that the elevator slowly runs to a flat floor to release a user. However, the number of the band-type brake brakes of the ultra-high-speed elevator is generally more than that of the conventional low-speed elevator, the torque of the brakes and the jiggers is too large, a plurality of elevator maintenance personnel are often matched in a mechanical brake releasing mode, the labor cost is high, the rescue time is long, the brake releasing cost of the elevator is too high, and the experience of passengers in the lift car is poor. The electric brake releasing mode adopts an electric brake releasing device to provide power for a brake, so that the brake of the main machine is released, and the elevator runs to a flat floor to release passengers. However, the electric brake release device manually presses a button to control the starting and stopping of the electric brake release, so that the brake release time is not easy to control, and the electric brake release device is always started and stopped, so that the passenger experience in the lift car is poor, and the car slipping and stalling are easy to happen. Especially for an ultra-high speed elevator, the power of a main machine is too high, the main machine is easily damaged due to too high star-sealing current and the star-sealing can not be sealed, so that the star-sealing function needs to be cancelled, and the manual and electric brake releasing mode is directly adopted, so that the car sliding speed is too high after the band-type brake of the main machine is released, accidents are easily caused, the panic of passengers in a car is caused, and the flat bed precision is poor and the safety is not high enough due to the high speed when the elevator stops.
Disclosure of Invention
The embodiment provides an elevator brake release system to solve the problems that in the prior art, after a main engine brake is released, the car slips too fast, accidents are easy to happen, passengers in a car are panic, and the leveling precision is poor and the safety is not high enough due to the fast speed when the car stops.
The utility model provides an elevator system of separating brake, including electronic device and the stopper of separating brake, elevator system of separating brake still includes module and the pressure regulating module of testing the speed, the output of electronic device of separating brake via the pressure regulating module with the stopper is connected, wherein:
the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the voltage regulating module;
and the voltage regulating module is used for regulating the brake voltage output by the electric brake release device to the brake according to the real-time speed signal.
In some embodiments, the voltage regulating module includes a variable resistor and a resistance regulating device, the output end of the electric brake release device is connected to the brake via the variable resistor, and the speed measuring module outputs a real-time speed signal to the resistance regulating device, where:
the resistance adjusting device is used for adjusting the resistance value of the variable resistor according to the real-time speed signal;
the variable resistor is used for adjusting the brake voltage output to the brake by the electric brake release device according to the change of the resistance value of the variable resistor.
In some of these embodiments, the variable resistance comprises a sliding resistance, the resistance adjustment device comprises a first motor, a first motor adjustment unit, and a first motor power supply, the tachometer module is connected to the first motor adjustment unit, the first motor power supply is connected to the first motor through the first motor adjustment unit, the first motor is further connected to a slide of the sliding resistance, wherein:
the first motor power supply is used for supplying power to the first motor;
the first motor adjusting unit is used for adjusting the steering of the first motor rotor and the time for the first motor power supply to supply power to the first motor according to the real-time speed signal;
the first motor is used for adjusting the position of the sliding sheet on the sliding rod of the sliding resistor according to the steering and the power supply time, so that the resistance value of the sliding resistor is adjusted. In some embodiments, the first motor adjusting unit comprises a first relay and a second relay, the first motor power supply, the first relay and the first motor are sequentially connected to form a first power supply circuit, the first motor power supply, the second relay and the first motor are sequentially connected to form a second power supply circuit, and the speed measuring module outputs a real-time speed signal to the first relay and the second relay, wherein:
the first relay is closed only when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold value, so that the first power supply circuit is switched on and is used for controlling the rotor of the first motor to rotate in the forward direction;
the second relay is only closed when the real-time speed signal indicates that the real-time speed of the elevator is lower than a second speed threshold value, so that the second power supply circuit is conducted and is used for controlling the rotor of the first motor to rotate reversely, and the first speed threshold value is not lower than the second speed threshold value.
In some of these embodiments, the first motor comprises a three-phase motor, the first relay comprises a first contact pair, a second contact pair, and a third contact pair, and the second relay comprises a fourth contact pair, a fifth contact pair, and a sixth contact pair, wherein:
when the first power supply circuit is switched on, the first contact pair, the second contact pair and the third contact pair are attracted, the first contact pair is used for conducting a first phase output port and a first input port of the first motor, the second contact pair is used for conducting a second phase output port and a second input port of the first motor, and the third contact pair is used for conducting a third phase output port and a third input port of the first motor;
when the second power supply circuit is switched on, the fourth contact pair, the fifth contact pair and the sixth contact pair are attracted, the fourth contact pair is used for conducting a third phase output port and a first input port of the first motor, the fifth contact pair is used for conducting a second phase output port and a second input port of the first motor, and the sixth contact pair is used for conducting a first phase output port and a third input port of the first motor.
In some embodiments, the first motor is connected to the sliding piece of the sliding resistor through a flexible connection member, and the sliding piece is controlled to move on the sliding rod along a first direction, and the sliding piece of the sliding resistor is further connected to a reset member, wherein:
the reset piece is used for controlling the sliding piece to move on the sliding rod along a second direction, and the first direction is opposite to the second direction.
In some embodiments, the variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel to two ends of the brake, the first variable resistor and the second variable resistor are connected in series to an output end of the electric brake release device, the first variable resistor is used for dividing the brake voltage, and the second variable resistor is used for adjusting the voltage across the brake.
In some embodiments, the output end of the electric brake release device is connected with the voltage regulating module through the transformer, and the brake voltage output by the electric brake release device after being transformed through the transformer comprises 110V direct current, 125V direct current, 110V alternating current and 220V alternating current.
In some embodiments, a first speed threshold and a second speed threshold are preset in the speed measuring module, when the real-time speed of the elevator is lower than the second speed threshold, the speed measuring module outputs a speed too-slow signal, when the real-time speed of the elevator is higher than the first speed threshold, the speed measuring module outputs a speed too-fast signal, when the real-time speed of the elevator is not lower than the second speed threshold and is not higher than the first speed threshold, the speed measuring module does not output a signal, and the second speed threshold is not higher than the first speed threshold; the pressure regulating module is based on speed slow signal regulation band-type brake voltage increases, the pressure regulating module is based on speed fast signal regulation band-type brake voltage reduces, works as when the module of testing the speed is not the output signal, the pressure regulating module does not adjust band-type brake voltage.
In some embodiments, a third speed threshold is preset in the speed measurement module, when the real-time speed of the elevator is higher than the first speed threshold and lower than the third speed threshold, the speed measurement module outputs an over-speed signal, when the real-time speed of the elevator is not lower than the third speed threshold, the speed measurement module outputs an overspeed signal, the electric brake release device stops outputting the brake voltage to the brake based on the overspeed signal, and the third speed threshold is higher than the first speed threshold.
In some embodiments of the above, the elevator brake release system further includes a first timeout protection module, a fourth speed threshold is preset in the speed measurement module, when the real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module outputs a speed too-slow signal, when the real-time speed of the elevator is not higher than the fourth speed threshold, the speed measurement module continuously sends a low-speed signal to the first timeout protection module, if the duration of the low-speed signal exceeds a first time threshold preset by the first timeout protection module, the first timeout protection module controls the electric brake release device to stop outputting the brake voltage to the brake, and the fourth speed threshold is lower than the second speed threshold.
In some of these embodiments, the speed measurement module comprises a speed sensor, the elevator trip system further comprises an encoder connected with the speed sensor, wherein:
the encoder is used for generating an encoder pulse signal according to the rotation displacement of the elevator main machine;
and the speed sensor is used for determining the real-time speed of the elevator after the brake is released according to the encoder pulse signal.
In some of these embodiments, the elevator system of separating brake still includes sealing star module, seal star module and the input port of the three-phase winding of elevator host computer is connected.
In some of these embodiments, the elevator brake release system further comprises at least one of a leveling signal detection module and a second timeout protection module, the at least one of the leveling signal detection module and the second timeout protection module being connected with the electric brake release, wherein:
the leveling signal detection module is used for controlling the electric brake release device to stop outputting voltage after the leveling signal of the elevator is acquired;
and the second overtime protection module is used for controlling the electric brake release device to stop outputting the voltage when the time for the electric brake release device to output the brake voltage exceeds a second time threshold preset by the second overtime protection module.
Compared with the prior art, the elevator system that declutches that provides in this embodiment, including electronic declutching device and stopper, elevator system that declutches still includes module and the pressure regulating module of testing the speed, the output of electronic declutching device via the pressure regulating module with the stopper is connected, wherein: the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the pressure regulating module; and the voltage regulating module is used for regulating the brake voltage output by the electric brake release device to the brake according to the real-time speed signal. The real-time running speed of the elevator after the brake is released is determined through the speed measuring module, the brake voltage output to the brake by the electric brake releasing device is adjusted according to the real-time running speed, the real-time running speed of the elevator is controlled within a safe and controllable range through the brake, the problem that in the related technology, the speed of car sliding is too high after the brake of a host is released, accidents are easy to happen and passengers in a car are panic, and the problem that the safety is poor and not safe enough due to high speed when the car is stopped is solved.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural view of an elevator brake release system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an elevator brake release system according to another embodiment of the present invention;
fig. 3 is a schematic structural view of an elevator brake release system according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a resistance adjustment device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first relay and a second relay according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a sliding resistor according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a varistor according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a transformer according to an embodiment of the present invention.
Detailed Description
For a clearer understanding of the objects, aspects and advantages of the present application, reference is made to the following description and accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the same general meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of this application do not denote a limitation of quantity, either in the singular or the plural. The terms "comprises," "comprising," "has," "having," and any variations thereof, as referred to in this application, are intended to cover non-exclusive inclusions; for example, a process, method, and system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or modules, but may include other steps or modules (elements) not listed or inherent to such process, method, article, or apparatus. Reference throughout this application to "connected," "coupled," and the like is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference to "a plurality" in this application means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. In general, the character "/" indicates a relationship in which the objects associated before and after are an "or". Reference in the present application to the terms "first," "second," "third," etc., merely distinguish between similar objects and do not denote a particular order or importance to the objects.
In one embodiment, the elevator system that declutches includes electronic declutching device and stopper, still includes the module of testing the speed and the voltage regulating module, and the output of electronic declutching device is connected with the stopper via the voltage regulating module, wherein: the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the voltage regulating module; and the voltage regulating module is used for regulating the brake voltage output to the brake by the electric brake release device according to the real-time speed signal.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an elevator brake release system according to an embodiment of the present invention.
An elevator brake release system is a core system for emergency rescue in an accident such as power failure of an elevator, and generally includes an electric brake release device 100 and a brake 200. The electric brake release device 100 comprises a storage battery, a charging circuit, a boosting output circuit, a control circuit, an operation button and other components, the electric brake release device 100 always monitors whether commercial power exists, the device is not put into operation under the condition that the commercial power exists, and the commercial power charges the storage battery for standby; when no commercial power is available and the elevator has an accident, the elevator maintenance personnel inputs a brake releasing instruction to the electric brake releasing device 100 by pressing a brake releasing button of the electric brake releasing device 100. After receiving the brake release instruction, the electric brake release device 100 outputs brake voltage to the brake 200 to control the brake 200 to be released, and under the combined action of gravity and the brake 200, the elevator enters a brake release downlink state to control the elevator to run to a leveling position. The electric brake release device 100 belongs to the prior art, and is not limited herein.
Exemplarily, the elevator brake release system further includes a speed measuring module 300 and a pressure regulating module 400, the pressure regulating module 400 is disposed between the electric brake release device 100 and the brake 200, and the speed measuring module 300 is connected to the pressure regulating module 400. The speed measuring module 300 is used for acquiring the real-time speed of the elevator after the brake is released and sending the real-time speed signal to the voltage regulating module 400; the voltage regulating module 400 receives the real-time speed signal and regulates the magnitude of the brake voltage output by the electric brake release device 100 to the brake 200 according to the real-time speed signal of the elevator.
Specifically, the speed measuring module 300 includes a speed sensor, and the speed sensor obtains the real-time speed of the elevator and generates a sensing signal in the forms of pressure sensing generated when the elevator goes down, the moving speed of a suspension rope, the rotating speed of an elevator main machine and the like, and the sensing signal is a real-time speed signal. For example, the speed measuring module 300 may be a speed sensor connected to an encoder of the elevator main machine, and detects the current speed of the elevator car by collecting pulse signals of the encoder; or an inductive switch connected to the elevator governor.
Specifically, the voltage regulating module 400 includes a voltage regulating resistor to perform voltage division regulation on the output voltage of the electric brake release device 100; alternatively, the voltage regulating module 400 may be provided as a transistor circuit having a voltage regulating function.
Elevator brake release system includes electronic brake release device and stopper in this embodiment, still includes module and the pressure regulating module of testing the speed, and the output of electronic brake release device is connected with the stopper via the pressure regulating module, wherein: the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the voltage regulating module; and the voltage regulating module is used for regulating the brake voltage output to the brake by the electric brake release device according to the real-time speed signal. The real-time running speed of the elevator after the brake is released is determined through the speed measuring module, the brake voltage output to the brake by the electric brake releasing device is adjusted according to the real-time running speed, the real-time running speed of the elevator is controlled within a safe and controllable range through the brake, the problem that in the related technology, the speed of car sliding is too high after the brake of a host is released, accidents are easy to happen and passengers in a car are panic, and the problem that the safety is poor and not safe enough due to high speed when the car is stopped is solved.
In another embodiment, the voltage regulation module includes a variable resistor and a resistance regulation device, and the speed measurement module outputs a real-time speed signal to the resistance regulation device, wherein: the resistance adjusting device is used for adjusting the resistance value of the variable resistor according to the real-time speed signal; and the variable resistor is used for adjusting the electric brake release device to output brake voltage to the brake according to the change of the resistance value of the variable resistor.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an elevator brake release system according to another embodiment of the present invention.
Illustratively, the voltage regulating module 400 includes a variable resistor 410 and a resistance regulating device 420, the variable resistor 410 is disposed between the electric brake release device 100 and the brake 200, one end of the resistance regulating device 420 is connected to the variable resistor 410, and the other end is connected to the speed measuring module 300. The variable resistor 410 is a resistor with a variable resistance, such as a sliding resistor, a deformation resistor, a resistor group controlled by a multi-way switch, and the like, and the resistance adjusting device 420 can adjust the resistance of the variable resistor 410 according to the resistance variation characteristic of the variable resistor 410.
Illustratively, the resistance adjusting device 420 acquires a real-time speed signal output by the speed measuring module 300, and adjusts the resistance value of the variable resistor 410 based on the real-time speed signal; after the resistance value of the variable resistor 410 changes, the band-type brake voltage output to the brake 200 by the electric brake release device 100 also changes, so that the adjustment of the band-type brake voltage is realized.
In one embodiment, the variable resistor 410 is a deformation resistor, the resistance adjusting device 420 is a stepping motor, and the stepping motor applies corresponding pressure to the variable resistor 410 according to the real-time speed signal to deform the variable resistor 410, so as to adjust the resistance of the variable resistor 410; in another embodiment, the variable resistor 410 is a resistor group having a multi-way switch, which is turned on or closed based on the real-time speed signal, and the multi-way switch is switched to adjust the resistance connected to the circuit of the electric brake release device, so as to change the band-type brake voltage.
This embodiment is adjusted the band-type brake voltage of electronic release device output through the mode that sets up variable resistance, simple structure, and variable resistance's resistance is easily controlled to the band-type brake voltage that obtains the stopper needs that can be more stable and accurate, and then improved the accuracy of elevator system control that declutches.
In another embodiment, the variable resistor includes a sliding resistor, the input end of the resistance adjusting device is connected to the speed measuring module, the resistance adjusting device is further connected to a slider of the sliding resistor, wherein: and the resistance adjusting device is used for adjusting the position of the sliding sheet on the sliding rod of the sliding resistor according to the real-time speed signal.
In this embodiment, the variable resistor is exemplarily configured as a sliding resistor, the sliding resistor has a structure of a resistor element, a sliding rod, a sliding sheet, and the like, and the resistance of the sliding resistor connected to the circuit can be adjusted by adjusting the position of the sliding sheet on the sliding rod.
Exemplarily, the input end of the resistance adjusting device is electrically connected with the speed measuring module and used for acquiring a real-time speed signal output by the speed measuring module, and the resistance adjusting device is further mechanically connected with a sliding sheet of the sliding resistor, so that the position of the sliding sheet on the sliding rod is adjusted according to the real-time speed signal, and the resistance value of the sliding resistor is adjusted.
Specifically, the resistance adjustment device is a stepping motor. In one embodiment, the stepping motor is connected with the sliding sheet of the sliding resistor through the hard connecting piece, and the rotor of the stepping motor rotates to drive the hard connecting piece to displace, so that thrust or pull is generated on the sliding sheet of the sliding resistor, and the position of the sliding sheet on the sliding rod is adjusted; in another embodiment, the stepping motor is connected with the sliding sheet of the sliding resistor through a soft connecting piece such as a belt, and the rotor of the stepping motor rotates to pull the soft connecting piece to displace, so that pulling force is generated on the sliding sheet of the sliding resistor; the sliding resistor is further provided with a spring, one end of the spring is fixed to the sliding sheet, the other end of the spring is fixed to one end of the sliding rod, the position of the sliding sheet is reset, and the position of the sliding sheet on the sliding rod is adjusted jointly through the soft connecting piece and the spring.
In another embodiment, the resistance adjustment device comprises a first motor, a first motor adjustment unit, and a first motor power supply, the speed measurement module is connected to the first motor adjustment unit, the first motor power supply is connected to the first motor through the first motor adjustment unit, the first motor is further connected to the slider of the sliding resistor, wherein: a first motor power supply for supplying power to the first motor; the first motor adjusting unit is used for adjusting the steering of the rotor of the first motor and the time for the power supply of the first motor power supply to the first motor according to the real-time speed signal; and the first motor is used for adjusting the position of the sliding sheet on the sliding rod of the sliding resistor according to the steering and power supply time, so that the resistance value of the sliding resistor is adjusted.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an elevator brake release system according to another embodiment of the present invention.
Exemplarily, as shown in fig. 3, the resistance adjustment apparatus includes a first motor 421, a first motor adjustment unit 422, and a first motor power source 423, the speed measurement module 300, the first motor adjustment unit 422, and the first motor 421 are electrically connected in sequence, the first motor adjustment unit 422 is further electrically connected to the first motor power source 423, and the first motor 421 is mechanically connected to the sliding piece of the sliding resistor 411.
Illustratively, the first motor power supply 423 is configured to provide electrical power to the first electric motor 421 to rotate the rotor of the first electric motor 421. The first motor adjusting unit 422 is disposed between the first motor 421 and the first motor power supply 423, and is configured to control forward rotation or reverse rotation of a rotor of the first motor 421 and time for the first motor power supply 423 to supply power to the first motor 421 according to the real-time speed signal output by the speed measuring module 300; the first motor 421 is mechanically connected to the slide of the sliding resistor 411, so that the position of the slide on the sliding rod is controlled by the forward rotation or reverse rotation of the rotor of the first motor 421 and the power supply time.
Specifically, when a brake releasing button of the electric brake releasing device is manually pressed, the electric brake releasing device outputs brake voltage to the brake. After the elevator slides, the speed measuring module detects the real-time speed after the elevator slides and outputs a real-time speed signal, and when the real-time speed exceeds a set safety limit range (for example, 0.15-0.4 m/s), the first motor adjusting unit controls the power supply of the first motor based on the real-time speed signal, so that the position of a sliding sheet of the sliding resistor is adjusted to change the resistance value of the sliding resistor, the band-type brake voltage output by the electric brake release device is reduced, and the speed of the elevator sliding is reduced.
This embodiment sets up first motor and adjusts sliding resistor's resistance to control the direction of rotation and the rotation time of first motor rotor through first motor regulating unit, sliding resistor's resistance regulative mode is simple and easily control, thereby has reduced elevator system's that declutches hardware cost.
In another embodiment, the first motor adjusting unit includes a first relay and a second relay, the first motor power supply, the first relay and the first motor are sequentially connected as a first power supply circuit, the first motor power supply, the second relay and the first motor are sequentially connected as a second power supply circuit, and the speed measuring module outputs a real-time speed signal to the first relay and the second relay, wherein:
the first relay is closed only when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold value, so that the first power supply circuit is conducted and is used for controlling the rotor of the first motor to rotate in the forward direction;
the second relay is only attracted when the real-time speed signal indicates that the real-time speed of the elevator is lower than a second speed threshold value so as to conduct the second power supply circuit and control the rotor of the first motor to rotate reversely, and the first speed threshold value is not lower than the second speed threshold value.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a resistance adjusting apparatus according to an embodiment of the invention.
For example, as shown in fig. 4, the first motor adjusting unit 422 includes a first relay JDQ1 and a second relay JDQ2, the tachometer module 300 is connected to the first motor 421 through the first relay JDQ1 or the second relay JDQ2, and the first relay JDQ1 and the second relay JDQ2 are further connected to the first motor power source 423. When the real-time speed of the elevator is higher than a first speed threshold value, a first relay JDQ1 is closed, at the moment, a first motor power supply 423 is conducted with a first motor 421 through the first relay JDQ1, namely, a first power supply circuit is conducted, and the first motor 421 rotates in the forward direction; when the real-time speed of the elevator is lower than the second speed threshold value, the second relay JDQ2 is closed, at the moment, the first motor power supply 423 is conducted with the first motor 421 through the second relay JDQ2, namely, the second power supply circuit is conducted, and the first motor 421 rotates reversely. The first speed threshold value is not lower than the second speed threshold value, and a threshold value interval formed by the first speed threshold value and the second speed threshold value is a safety range of real-time speed after the elevator is released. When the real-time speed of the elevator is within the safe range, the first relay JDQ1 and the second relay JDQ2 are not attracted, the first motor 421 loses power and stops rotating, and the resistance value of the sliding resistor stops changing.
Specifically, the first relay JDQ1 and the second relay JDQ2 control the direction of the input current to the first motor 421 to switch the forward rotation and the reverse rotation of the rotor of the first motor 421.
Specifically, when the speed measuring module 300 detects that the real-time speed of the elevator after the brake is released is too high, the speed measuring module 300 outputs a first level signal, so that the first relay JDQ1 is attracted, the first motor 421 is connected to the circuit of the first motor power supply 423, the rotor of the first motor 421 rotates in the forward direction to adjust the resistance value of the sliding resistor 411, and the first motor 421 stops rotating until the real-time speed of the elevator is within the safe range; when the speed measuring module 300 detects that the real-time speed of the elevator after the brake is released is too slow, the speed measuring module 300 outputs a second level signal, so that the second relay JDQ2 is closed, the first motor 421 is connected to the circuit of the first motor power supply 423, the rotor of the first motor 421 rotates reversely to adjust the resistance of the sliding resistor 411, and the first motor 421 stops rotating until the real-time speed of the elevator is within the safe range.
First motor regulating unit sets up to first relay and second relay in this embodiment, controls the forward rotation and the reverse rotation of first motor respectively through first relay and second relay, and then adjusts the gleitbretter position to control sliding resistor's resistance, the control mode is simple and stable, need not to realize the switching of first motor input current direction through schemes such as complicated transistor circuit, thereby has reduced the hardware cost of elevator system of opening a brake.
In another embodiment, a first speed threshold and a second speed threshold are preset in the speed measurement module 300, when the running speed of the elevator is detected to be lower than the second speed threshold, a speed too-slow signal is output, when the running speed of the elevator is detected to be higher than the first speed threshold, a speed too-fast signal is output, when the running speed of the elevator is detected to be between the first speed threshold and the second speed threshold (including the first speed threshold and the second speed threshold), no signal is output, and the second speed threshold is not higher than the first speed threshold. The voltage regulating module regulates the increase of the band-type brake voltage based on the over-slow speed signal, so that the brake releasing amplitude of the brake is increased, and the elevator sliding speed is increased; the voltage regulating module regulates the reduction of the brake voltage based on the over-high speed signal, the brake release amplitude of the brake is reduced, and the elevator sliding speed is reduced; when the speed measuring module does not output signals, the voltage regulating module does not regulate the brake voltage, and the brake releasing amplitude of the brake is unchanged.
Specifically, the speed measuring module 300 may include a speed sensor connected to an encoder of the elevator main machine, and a second speed threshold, for example, 0.05m/s and a first speed threshold, for example, 0.15m/s are provided in the speed sensor. The speed sensor can calculate the running speed of the elevator through the received pulse signals of the encoder, when the obtained running speed of the elevator is smaller than 0.05m/s, a too slow speed signal is output, when the obtained running speed of the elevator is larger than 0.15m/s, a too fast speed signal is output, and when the obtained running speed of the elevator is not smaller than 0.05m/s and not larger than 0.15m/s, a signal is not output.
In another embodiment, a third speed threshold is preset in the speed measuring module 300, when it is detected that the running speed of the elevator is higher than the first speed threshold and lower than the third speed threshold, an over-speed signal is output, and when it is detected that the running speed of the elevator is not lower than the third speed threshold, an over-speed signal is output to the electric brake release device, and the electric brake release device is triggered to stop outputting the voltage. The third speed threshold is higher than the first speed threshold.
Specifically, the speed measuring module 300, for example, a speed sensor, is further provided with a third speed threshold, for example, 0.4m/s, when the running speed of the elevator obtained by the speed sensor is greater than 0.15m/s and less than 0.4m/s, an over-speed signal is output, and when the obtained running speed of the elevator is greater than or equal to 0.4m/s, an overspeed signal is output to the electric brake release device, that is, the running speed of the elevator after the brake release is too high, the electric brake release device is controlled to stop supplying power to the brake, and the brake, that is, the brake, brakes the elevator.
In another embodiment, the motor comprises a three-phase motor, the first relay comprises a first contact pair, a second contact pair, and a third contact pair, and the second relay comprises a fourth contact pair, a fifth contact pair, and a sixth contact pair, wherein: when the real-time speed of the elevator is higher than a first speed threshold value, a first contact pair, a second contact pair and a third contact pair are attracted, the first contact pair is used for conducting a first phase output port and a first input port of a first motor, the second contact pair is used for conducting a second phase output port and a second input port of the first motor, and the third contact pair is used for conducting a third phase output port and a third input port of the first motor; and when the real-time speed of the elevator is lower than the second speed threshold, attracting a fourth contact pair, a fifth contact pair and a sixth contact pair, wherein the fourth contact pair is used for conducting a third phase output port and a first input port of the first motor, the fifth contact pair is used for conducting a second phase output port and a second input port of the first motor, and the sixth contact pair is used for conducting the first phase output port and a third input port of the first motor.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a first relay and a second relay according to an embodiment of the invention.
For example, the first motor is provided as a three-phase motor in the present embodiment. The three-phase motor is an alternating current motor driven by three-phase alternating current, and when three alternating currents with a phase difference of 120 degrees are connected to a three-phase stator winding of the three-phase motor, a rotating magnetic field is generated and cuts the stator winding to drive the rotor to rotate.
Specifically, when the input currents of any two phases of the three-phase motor are switched, the rotating magnetic field of the three-phase motor is reversed, and the rotating direction of the rotor is changed accordingly. Based on this, through setting up first relay JDQ1 and second relay JDQ2 for under first relay JDQ1 actuation condition, with second relay JDQ2 actuation state, the input current of arbitrary two phase positions in the input of two three-phase motors is exchanged, can realize the corotation of three-phase motor and reverse rotation switching.
Specifically, in the present embodiment, the first relay JDQ1 is provided with three contact pairs, which are a first contact pair J1, a second contact pair J2, and a third contact pair J3. When the real-time speed of the elevator is higher than the first speed threshold, the first relay JDQ1 is engaged, that is, the first contact pair J1, the second contact pair J2 and the third contact pair J3 are engaged, the first contact pair J1 is used to conduct the first phase output port (L1 port) and the first input port (U port) of the first motor 421, the second contact pair J2 is used to conduct the second phase output port (L2 port) and the second input port (V port) of the first motor 421, the third contact pair J3 is used to conduct the third phase output port (L3 port) and the third input port (W port) of the first motor 421, and at this time, the first motor 421 rotates in the forward direction.
Specifically, in the second relay JDQ2 in this embodiment, three contact pairs, namely, a fourth contact pair J4, a fifth contact pair J5, and a sixth contact pair J6, are provided. When the real-time speed of the elevator is lower than the second speed threshold, the second relay JDQ2 is closed, that is, the fourth contact pair J4, the fifth contact pair J5, and the sixth contact pair J6 are closed, the fourth contact pair J4 is used to connect the third phase output port (L3 port) and the first input port (U port) of the first motor 421, the fifth contact pair J5 is used to connect the second phase output port (L2 port) and the second input port (V port) of the first motor 421, and the sixth contact pair J6 is used to connect the first phase output port (L1 port) and the third input port (W port) of the first motor 421, and at this time, since the phases of the input currents of the first input port and the third input port of the first motor 421 are reversed, the first motor 421 rotates in the reverse direction.
In the embodiment, a plurality of contact pairs are respectively arranged in the first relay and the second relay, and the connection relation between each contact pair and the phase output port and the motor input port is set, so that in the state of attracting the first relay, compared with the state of attracting the second relay, the input currents of two phases of the first input port and the third input port of the first motor and the second input port of the first relay and the second relay are exchanged, the rotating direction of the motor rotor is switched, the control method and the setting mode of the contact pairs are simple, and the hardware cost of the elevator brake releasing system is reduced.
In another embodiment, the first motor is connected to a sliding piece of the sliding resistor through a flexible connecting member, the sliding piece is controlled to move on the sliding rod along a first direction, the sliding piece of the sliding resistor is further connected to the reset member, wherein: and the resetting piece is used for resetting the position of the sliding piece of the sliding resistor and controlling the sliding piece to move on the sliding rod along a second direction, and the first direction is opposite to the second direction.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a sliding resistor according to an embodiment of the invention.
Illustratively, the first motor is mechanically connected with a sliding piece of the sliding resistor through a flexible connecting piece, the sliding piece of the sliding resistor is further connected with a resetting piece, the resetting piece is used for resetting the position of the sliding piece of the sliding resistor, and the position of the sliding piece on the sliding rod is adjusted through pulling force applied to the sliding piece by the flexible connecting piece and the resetting piece together. Wherein, flexible connection spare can set up to connecting pieces such as belt, and the piece that resets can set up to the piece that resets such as spring.
Specifically, when the first motor rotor rotates in the forward direction, the first motor reel contracts the belt, and pulls the sliding sheet of the sliding resistor and the spring to move along the first direction, so that the resistance value of the sliding resistor access circuit is increased; when the first motor rotor rotates reversely, the first motor reel releases the belt, and the spring pulls the sliding sheet of the sliding resistor to reset along the second direction, so that the resistance value of the sliding resistor connected to the resistor is reduced.
In another embodiment, the variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel to two ends of the brake, the first variable resistor and the second variable resistor are connected in series to an output end of the electric brake release device, the first variable resistor is used for dividing the brake voltage, and the second variable resistor is used for adjusting the voltage of two ends of the brake.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a variable resistor according to an embodiment of the invention.
Exemplarily, as shown in fig. 7, the port a and the port B are output ports of the electric brake release device, respectively, the first resistor R1 is connected to the port a, and the other end is simultaneously connected to the second resistor R2 and the brake 200; one end of the second resistor R2 is connected to the first resistor R1, and the other end is connected to the brake 200. In the current loop formed by the a port and the B port shown in fig. 7, the first resistor R1 is disposed in the current trunk, and the second resistor R2 is disposed in the current branch and connected in parallel to the brake 200.
Specifically, the first resistor R1 and the second resistor R2 can be set as sliding resistors, and after the first motor is connected to the first motor power supply, the positions of sliding blades of the first resistor R1 and the second resistor R2 are adjusted, so that the resistance values of the first resistor R1 and the second resistor R2 are changed, and further the terminal voltages of the first resistor R1 and the second resistor R2 are changed. It can be understood that the sum of the terminal voltage of the first resistor R1 and the terminal voltage of the second resistor R2 is the voltage difference between the a port and the B port, and the terminal voltage of the second resistor R2 is equal to the input voltage of the brake 200.
This embodiment sets up first resistance and second resistance, drives first resistance and second resistance with the adjustment resistance size through first motor to through the resistance size relation of first resistance and second resistance, the band-type brake voltage of adjustment input brake, control mode is simple and easily realize, thereby has reduced the hardware cost of elevator system of separating brake.
In another embodiment, the first resistor R1 may be a fixed resistor or a variable resistor, and only performs a voltage division function. The second resistor R2 is a sliding resistor and is connected with the first motor, and after the first motor is communicated with a power supply of the first motor based on a real-time speed signal sent by the speed measuring module, the position of a sliding sheet of the second resistor R2 is adjusted, so that the input voltage of the brake 200 is adjusted.
In another embodiment, the elevator brake release system further comprises a transformer, and the output end of the electric brake release device is connected with the voltage regulating module through the transformer.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a transformer according to an embodiment of the invention.
Exemplarily, as shown in fig. 8, a transformer is further disposed between the electric brake release device and the voltage regulating module, and is used for transforming the band-type brake voltage output by the electric brake release device.
Specifically, the input end of the transformer is provided with two input ports, namely an L port and an N port, which are respectively connected with two output ports of the electric brake release device, and the transformer receives the output voltage of the electric brake release device and transforms the voltage. The output voltage of the transformer includes, but is not limited to, various voltages such as dc 110V, dc 125V, ac 110V, and ac 220V, which are used for brakes with different electrical parameters. When a user sends a CPA (air switch), the L port and the N port are connected with the electric brake release device, and the transformer transforms the output voltage of the electric brake release device to obtain the brake voltages suitable for different brakes.
The elevator brake release system in this embodiment includes the transformer, adjusts the band-type brake voltage of electronic release device output through the transformer to improve the accuracy of band-type brake voltage, and with the suitability between the stopper of different specifications, and then improved the accuracy of elevator brake release system control and the extensive nature of application.
In another embodiment, the elevator system of separating brake still includes the encoder, and the encoder is connected with the speed measurement module, wherein: the encoder is used for generating an encoder pulse signal according to the rotation displacement of the elevator main machine; and the speed measuring module is used for determining the real-time speed after the brake is released according to the encoder pulse signal. Wherein, the speed measuring module includes speed sensor.
The elevator brake release system is further provided with an encoder, one end of the encoder is connected with the elevator main machine, the other end of the encoder is connected with a speed sensor, the encoder generates an encoder pulse signal based on the rotation displacement of the elevator main machine and sends the encoder pulse signal to the speed sensor, and the speed sensor receives and analyzes the encoder pulse signal to determine the running speed of the elevator. The encoder is a sensor that converts the displacement into a series of digital pulse signals, and can be used to measure the amount of rotational displacement or the amount of linear displacement.
The displacement volume of elevator is gathered through the encoder to this embodiment, generates encoder pulse signal, and speed sensor obtains the real-time speed signal after the elevator declutches based on this encoder pulse signal, and wherein the encoder has advantages such as the location is accurate, control accuracy is high, simple to operate, long service life to improve the accuracy that the speed after the elevator declutches detected and reduced the hardware cost of elevator declutching system.
In another embodiment, the elevator brake release system further comprises a star sealing module, and the star sealing module is connected with the input port of the three-phase winding of the elevator main machine.
Exemplarily, a star-sealing module is further arranged in the elevator brake releasing system, and three-phase interfaces of the star-sealing module are respectively connected with input ports of three-phase windings of the elevator main machine so as to realize three-phase input. Wherein, seal star module and can set up to a kind of contactor of elevator host computer, have the function of overspeed protection. When the running speed of the elevator is too fast, the star sealing module is in a release state, and the star sealing module can be in short circuit with a three-phase winding of the elevator main machine in the release state so as to control the input voltage of the elevator main machine. The star sealing module can act together with the pressure regulating module to reduce the running speed of the elevator after the brake is released.
In the embodiment, overspeed protection is performed through the star sealing module, wherein the star sealing module has the advantages of large control capacity, suitability for frequent operation, remote control and the like, so that the application scenes of the elevator brake releasing system are increased, the applicability is wider, and meanwhile, the safety of the elevator in the brake releasing process is improved.
In another embodiment, the elevator brake release system further comprises at least one of a leveling signal detection module and a second timeout protection module, and the at least one of the leveling signal detection module and the second timeout protection module is connected with the electric brake release device, wherein: the leveling signal detection module is used for controlling the electric brake release device to stop outputting voltage after the leveling signal of the elevator is acquired; and the second overtime protection module is used for controlling the electric brake release device to stop outputting the voltage when the time for the electric brake release device to output the brake voltage exceeds a second preset time threshold value.
In this embodiment, at least one of the leveling signal detection module and the second timeout protection module is further disposed in the elevator brake release system.
In one specific embodiment, the elevator brake release system is further provided with a leveling signal detection module, and the leveling signal detection module is connected with the electric brake release device and used for acquiring a leveling signal of the elevator and controlling the electric brake release device to stop outputting the brake voltage after receiving the leveling signal. The leveling signal detection module comprises an electrical control switch of the elevator and is used for sending an elevator leveling signal.
Specifically, the leveling signal detection module can be realized by the existing leveling photoelectric switch on the elevator, and leveling detection is realized by the photosensitive device of the leveling photoelectric switch; alternatively, the flat layer signal detection module can also be arranged as an additional flat layer photoelectric switch or magnetic switch.
Specifically, after the leveling signal detection module detects the leveling signal, a control instruction is sent to the electric brake release device. And after the electric brake release device receives the control command, stopping outputting the brake voltage to the brake. Alternatively, if the elevator needs to continue to run to be separated from the flat floor, the brake release button of the electric brake release device can be pressed again manually.
In another embodiment, a second overtime protection module is further arranged in the elevator brake releasing system, and the second overtime protection module is connected with the electric brake releasing device and used for judging whether the time for the electric brake releasing device to output the brake voltage exceeds a second preset time threshold value or not, and if the time exceeds the second preset time threshold value, the electric brake releasing device is controlled to stop outputting the brake voltage to the brake. Wherein, the second preset time threshold value can be set manually.
Specifically, the second timeout protection module may be configured as a binary dial time relay. When the electric brake release device starts to output brake voltage to the brake, the time relay starts to time, and when the brake release time exceeds a set second time threshold, the time relay cuts off the voltage output of the electric brake release device. For example, when a circuit of an elevator is disconnected to cause a hardware device to fail, or when the elevator is in a balanced state between a car and a counterweight and cannot be displaced, if the brake voltage is output to the brake all the time, the elevator is released for a long time to damage the brake or other hardware devices.
In another specific embodiment, a fourth speed threshold is further set in the speed measurement module, the fourth speed threshold is smaller than the second speed threshold, when the real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module outputs a speed too-slow signal, when the speed measurement module detects that the real-time speed of the elevator is not higher than the fourth speed threshold, the speed too-slow signal is continuously sent to the first timeout protection module, the first timeout protection module starts timing from receiving the low-speed signal, and if the receiving time exceeds the first preset time threshold, the electric brake release device is controlled to stop outputting the brake voltage to the brake. If the running speed of the elevator is not less than the fourth speed threshold, the speed measuring module stops outputting a low-speed signal to the first overtime protection module, and the first overtime protection module stops timing and resets.
Specifically, the first timeout protection module may be a time relay, and the speed measurement module may be a speed sensor. When the speed sensor detects that the running speed of the elevator is less than a fourth speed threshold value, such as 0.01m/s, the speed sensor continuously outputs a low-speed signal to the time relay, the time relay starts timing after receiving the low-speed signal, and when the time exceeds the preset low-speed time threshold value, such as 15s, the time relay cuts off the voltage output of the electric brake release device. If the speed detected by the speed sensor is not less than the fourth speed threshold before the second preset time threshold is not reached, the speed sensor stops outputting the low-speed signal to the time relay, and the time relay stops timing and is cleared to zero until the low-speed signal is received next time to start timing again. So set up, the electronic trip gear of prevention elevator does not basically not have under the circumstances that removes still output voltage, leads to long-time to the brake power supply and makes the brake damage that generates heat. The first timeout protection module and the second timeout protection module may be the same.
In the embodiment, at least one of a leveling signal detection module and an overtime protection module is arranged in the elevator brake release system, wherein the leveling signal detection module is used for judging whether the elevator reaches a leveling floor or not in the process of brake release operation of the elevator, and the overtime protection module is used for monitoring the total brake release time and the low-speed operation time of the elevator and cutting off the power supply of the electric brake release device to the brake when the total brake release time is too long or the low-speed operation time is too long, so that the safety of the elevator brake release is improved.
In another embodiment, in order to assist in explaining the working flows of the components of the elevator brake releasing system in the embodiment, the invention also discloses the working flow of the elevator brake releasing system.
For example, to prevent an erroneous operation from occurring when there is a mains input, the elevator brake release system enters an operating state only when the mains or peripheral circuits are disconnected.
After a worker presses a brake release button (two or more brake release buttons can be arranged to prevent misoperation and reduce adhesion risks), the electric brake release device detects whether commercial power is input or not, and enters a working state if the commercial power is not input;
the electric brake release device firstly controls the star sealing module to act, the star sealing module is used for short-circuiting three phases of the elevator host and outputting brake voltage, and the overtime protection module is used for timing the brake release time;
the running speed of the elevator is 0 at first and is lower than a fourth speed threshold and a second speed threshold preset in the speed measuring module, on one hand, the speed measuring module outputs a speed over-slow signal to the second relay, the second relay is electrified and closed, a circuit for supplying power to the first motor by a power supply of the first motor is conducted, the first motor is electrified and rotated to drive a sliding sheet of the sliding resistor to move, the resistance value of the sliding resistor is adjusted, the brake voltage output to the brake is adjusted, the brake is released, and the opening and closing amplitude is adjusted, so that the elevator starts to slide at a low speed; on the other hand, the speed measuring module also outputs a low-speed signal to the overtime protection module, but the running speed of the elevator is greater than a fourth speed threshold before the first time threshold preset by the overtime protection module is reached, so that the overtime protection module stops timing and resets the running time of the low speed;
the operation speed of the elevator is increased along with the adjustment of the sliding resistor, the speed measuring module detects the operation speed of the elevator in real time, when the operation speed of the elevator is increased to a second speed threshold value, the speed measuring module does not output a signal any more, a power supply circuit of the first motor is disconnected to stop rotating, the sliding resistor stops changing in resistance value, at the moment, the band-type brake voltage output to the brake by the electric brake releasing device is a fixed value, the brake is released by the brake with a fixed opening and closing amplitude, and the elevator continues to slide under the action of gravity;
when the running speed of the elevator is greater than a first speed threshold, the speed measuring module outputs a speed over-fast signal to the first relay, the first relay is electrified and sucked, a circuit for supplying power to the first motor by a power supply of the first motor is switched on, the first motor is electrified and rotates to drive a sliding piece of the sliding resistor to move reversely, the resistance value of the sliding resistor is adjusted, the band-type brake voltage output to the brake is adjusted, the opening and closing amplitude of the brake is reduced, the running speed of the elevator is reduced until the speed is reduced to be below the first speed threshold, the speed measuring module does not output the signal, the power supply circuit of the first motor is switched off and stops rotating, the sliding resistor stops changing the resistance value, the band-type brake voltage output to the brake by the electric brake releasing device is a fixed value, the brake is released by the fixed opening and closing amplitude, the resistance value of the variable resistor is adjusted in a self-adaptive manner, and the band-type brake voltage is adjusted to adjust the vehicle sliding speed of the elevator;
in the process of sliding the elevator, after the leveling signal detection module detects a leveling signal, a control instruction is sent to the electric brake release device, after the electric brake release device receives the control instruction, the electric brake release device stops outputting brake voltage to the brake, and the brake is used for braking the elevator.
If the speed of the elevator sliding exceeds the third speed threshold value and cannot be reduced, the speed measuring module outputs an overspeed signal to the electric brake releasing device, the electric brake releasing device is triggered to stop outputting voltage, and the brake is used for braking the elevator.
If the speed of the elevator sliding is continuously lower than the fourth speed threshold value and reaches the first time threshold value preset by the overtime protection module, the overtime protection module controls the electric brake releasing device to stop outputting brake voltage to the brake, and the brake is used for braking the elevator.
If the brake releasing time reaches a second time threshold preset by the overtime protection module, the overtime protection module controls the electric brake releasing device to stop outputting brake voltage to the brake, and the brake is used for braking the elevator.
For example, if the elevator needs to be taken out of the flat floor again, the release button needs to be pressed again by a human.
It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to be limiting. All other embodiments, which can be derived by a person skilled in the art from the examples provided herein without any inventive step, shall fall within the scope of protection of the present application.
It is obvious that the drawings are only examples or embodiments of the present application, and it is obvious to those skilled in the art that the present application can be applied to other similar cases according to the drawings without creative efforts. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly or implicitly understood by one of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.
The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the patent protection. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims (13)

1. The utility model provides an elevator system of separating brake, includes electronic device and stopper of separating brake, its characterized in that, elevator system of separating brake still includes module and the pressure regulating module of testing the speed, the output of electronic device of separating brake via the pressure regulating module with the stopper is connected, wherein:
the speed measuring module is used for detecting the real-time speed of the elevator after the brake is released and outputting a real-time speed signal to the pressure regulating module;
and the voltage regulating module is used for regulating the brake voltage output by the electric brake release device to the brake according to the real-time speed signal.
2. The elevator system of claim 1, wherein the voltage regulation module comprises a variable resistor and a resistance regulation device, and the speed measurement module outputs a real-time speed signal to the resistance regulation device, wherein:
the resistance adjusting device is used for adjusting the resistance value of the variable resistor according to the real-time speed signal;
the variable resistor is used for adjusting the brake voltage output to the brake by the electric brake release device according to the change of the resistance value of the variable resistor.
3. The elevator system of claim 2, wherein the variable resistance comprises a sliding resistance, the resistance adjustment device comprises a first motor, a first motor adjustment unit, and a first motor power supply, the speed measurement module is connected to the first motor adjustment unit, the first motor power supply is connected to the first motor through the first motor adjustment unit, the first motor is further connected to a sliding piece of the sliding resistance, wherein:
the first motor power supply is used for supplying power to the first motor;
the first motor adjusting unit is used for adjusting the steering of the first motor rotor and the time for the first motor power supply to supply power to the first motor according to the real-time speed signal;
the first motor is used for adjusting the position of the sliding sheet on a sliding rod of the sliding resistor according to the steering and the power supply time, so that the resistance value of the sliding resistor is adjusted.
4. The elevator system of claim 3, wherein the first motor regulation unit comprises a first relay and a second relay, the first motor power supply, the first relay and the first motor are sequentially connected as a first power supply circuit, the first motor power supply, the second relay and the first motor are sequentially connected as a second power supply circuit, and the speed measurement module outputs a real-time speed signal to the first relay and the second relay, wherein:
the first relay is only closed when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold value, so that the first power supply circuit is switched on and is used for controlling the rotor of the first motor to rotate in the forward direction;
the second relay is only closed when the real-time speed signal indicates that the real-time speed of the elevator is lower than a second speed threshold value, so that the second power supply circuit is conducted and is used for controlling the rotor of the first motor to rotate reversely, and the first speed threshold value is not lower than the second speed threshold value.
5. The elevator system of claim 3, wherein the first motor is coupled to a slide of the sliding resistor via a flexible linkage to control movement of the slide in a first direction on the sliding bar, the slide of the sliding resistor further coupled to a reset element, wherein:
the reset piece is used for controlling the sliding piece to move on the sliding rod along a second direction, and the first direction is opposite to the second direction.
6. The elevator brake release system according to claim 2, wherein the variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel across the brake, the first variable resistor and the second variable resistor are connected in series at an output of the electric brake release device, the first variable resistor is configured to divide the brake voltage, and the second variable resistor is configured to regulate the voltage across the brake.
7. The elevator brake release system according to claim 1, further comprising a transformer, wherein an output end of the electric brake release device is connected to the voltage regulating module via the transformer, and a brake voltage output by the electric brake release device after being transformed by the transformer includes dc 110V, dc 125V, ac 110V, and ac 220V.
8. The elevator brake release system according to claim 1, wherein a first speed threshold and a second speed threshold are preset in the speed measurement module, when the real-time speed of the elevator is lower than the second speed threshold, the speed measurement module outputs a speed too-slow signal, when the real-time speed of the elevator is higher than the first speed threshold, the speed measurement module outputs a speed too-fast signal, when the real-time speed of the elevator is not lower than the second speed threshold and is not higher than the first speed threshold, the speed measurement module does not output a signal, and the second speed threshold is not higher than the first speed threshold; the pressure regulating module is based on speed slow signal regulation band-type brake voltage increases, the pressure regulating module is based on speed fast signal regulation band-type brake voltage reduces, works as when the module of testing the speed is not the output signal, the pressure regulating module does not adjust band-type brake voltage.
9. The elevator brake release system according to claim 8, wherein a third speed threshold is preset in the speed measurement module, the speed measurement module outputs an over-speed signal when the real-time speed of the elevator is higher than the first speed threshold and lower than the third speed threshold, the speed measurement module outputs an overspeed signal when the real-time speed of the elevator is not lower than the third speed threshold, the electric brake release device stops outputting the brake voltage to the brake based on the overspeed signal, and the third speed threshold is higher than the first speed threshold.
10. The elevator brake release system according to claim 8, further comprising a first timeout protection module, wherein a fourth speed threshold is preset in the speed measurement module, the speed measurement module outputs a too-slow speed signal when a real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module continuously sends a low speed signal to the first timeout protection module when the real-time speed of the elevator is not higher than the fourth speed threshold, the first timeout protection module controls the electric brake release device to stop outputting the brake voltage to the brake if a duration of the low speed signal exceeds a first time threshold preset by the first timeout protection module, and the fourth speed threshold is smaller than the second speed threshold.
11. The elevator system of any one of claims 8-10, wherein the speed measurement module comprises a speed sensor, the elevator system further comprising an encoder connected to the speed sensor, wherein:
the encoder is used for generating an encoder pulse signal according to the rotation displacement of the elevator main machine;
and the speed sensor is used for determining the real-time speed of the elevator after the brake is released according to the encoder pulse signal.
12. The elevator system of claim 1, further comprising a star module connected to an input port of a three-phase winding of an elevator main machine.
13. The elevator brake release system of claim 1, further comprising at least one of a leveling signal detection module and a second timeout protection module, the at least one of the leveling signal detection module and the second timeout protection module being connected with the electric brake release device, wherein:
the leveling signal detection module is used for controlling the electric brake release device to stop outputting voltage after the leveling signal of the elevator is acquired;
and the second overtime protection module is used for controlling the electric brake release device to stop outputting the voltage when the time for the electric brake release device to output the brake voltage exceeds a second time threshold preset by the second overtime protection module.
CN202210910758.3A 2022-07-29 2022-07-29 Elevator brake release system Pending CN115285811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210910758.3A CN115285811A (en) 2022-07-29 2022-07-29 Elevator brake release system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210910758.3A CN115285811A (en) 2022-07-29 2022-07-29 Elevator brake release system

Publications (1)

Publication Number Publication Date
CN115285811A true CN115285811A (en) 2022-11-04

Family

ID=83825740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210910758.3A Pending CN115285811A (en) 2022-07-29 2022-07-29 Elevator brake release system

Country Status (1)

Country Link
CN (1) CN115285811A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117211735A (en) * 2023-09-12 2023-12-12 大庆石油管理局有限公司 Tower type pumping unit balance weight slow-release device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117211735A (en) * 2023-09-12 2023-12-12 大庆石油管理局有限公司 Tower type pumping unit balance weight slow-release device
CN117211735B (en) * 2023-09-12 2024-04-19 大庆石油管理局有限公司 Tower type pumping unit balance weight slow-release device

Similar Documents

Publication Publication Date Title
US11008197B2 (en) Method for performing a manual drive in an elevator after mains power-off
AU693924B2 (en) Procedure and apparatus for braking a synchronous motor
US6710574B2 (en) Reversible DC motor drive including a DC/DC converter and four quadrant DC/DC controller
US7740110B2 (en) Elevator brake and brake control circuit
RU2535117C2 (en) Phase of elevator rescue by-gravity run start by limited electric power supply
CN109665421A (en) Elevator traction mechanism with safety return circuit detection system
US5077508A (en) Method and apparatus for determining load holding torque
US8474793B2 (en) Lifting system
KR20080020576A (en) Elevator control apparatus
EP3245151A1 (en) A rescue apparatus and an elevator
CN115285811A (en) Elevator brake release system
JPH0764493B2 (en) Elevator control equipment
EP0733578A2 (en) Device for emergency operation of an elevator motor
CN217972113U (en) Elevator brake release system
CN1043281C (en) Motor driven door device
CN108975192A (en) A kind of double-brake electric hoist failure emergency load safe release system and method
JP2014240322A (en) Elevator confinement prevention device and elevator confinement prevention method
WO2001046056A1 (en) Dynamic braking system with speed control for an elevator cab
JP2001354366A (en) Control device for elevator
CN115818382A (en) Testing device and elevator testing system
JP2005029280A (en) Chain block
JP2006176257A (en) Elevator control device
CN1266812A (en) Drive control system for non-brush DC elevator
James Industrial controllers—With particular reference to the control of direct-current shunt motors
CN115108423A (en) Traction type elevator fault self-rescuing and escaping device and escaping method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination