阅读说明：本技术 电梯制动系统、机器控制方法及电梯系统 (Elevator braking system, machine control method and elevator system ) 是由 顾皓天 张皓然 于 2021-08-23 设计创作，主要内容包括：本发明公开了电梯制动系统、机器控制方法及电梯系统,属于电梯领域。电梯制动系统通过采集电梯的安全作业区域障碍物的触发信号；当采集单元采集到触发信号时,控制单元通过制动延时单元控制制动器的延迟抱闸速度,增加制动器的动作时间,减小电梯制动器闭合后电梯的震动,降低加速度,从而达到提升乘客舒适感的目的。(The invention discloses an elevator braking system, a machine control method and an elevator system, and belongs to the field of elevators. The elevator braking system collects a trigger signal of an obstacle in a safe operation area of the elevator; when the acquisition unit acquires the trigger signal, the control unit controls the delayed contracting brake speed of the brake through the brake delay unit, the action time of the brake is prolonged, the vibration of the elevator after the brake of the elevator is closed is reduced, and the acceleration is reduced, so that the purpose of improving the comfort of passengers is achieved.)

1. An elevator braking system comprising:

a brake assembled in conjunction with a hoist and a running space of the elevator, for braking a band-type brake to stop the elevator from running when the elevator is running;

it is characterized by also comprising:

the acquisition unit is used for acquiring a trigger signal of an obstacle in a safety operation area of the elevator;

the braking delay unit is connected with the brake and used for delaying the brake contracting speed of the brake;

and the control unit is connected with the acquisition unit and the braking delay unit, and when the acquisition unit acquires the trigger signal, the control unit is used for controlling the delayed band-type brake speed of the brake through the braking delay unit.

2. The elevator braking system of claim 1, wherein the capture unit employs a light curtain trigger sensor.

3. The elevator braking system of claim 1, wherein the braking delay unit comprises:

the first signal output end is connected with the brake;

the first signal input end is connected with the control unit;

the second signal input end is connected with the control unit;

an electromagnetic induction coil, one end of which forms the second signal input end;

the cathode of the diode is connected with the other end of the electromagnetic induction coil to form the first signal output end, and the anode of the diode forms the first signal input end;

the control unit comprises the first switch, one end of the first switch is connected with the first signal input end, and the other end of the first switch is connected with the second signal input end.

4. The elevator braking system of claim 3, wherein the control unit further comprises a third signal input and a second signal output;

further comprising: a power supply unit;

the negative electrode of the power supply unit is connected with the second signal output end of the control unit;

the acquisition unit comprises a fourth signal input end and a third signal output end, the fourth signal input end of the acquisition unit is connected with the positive electrode of the power supply unit, and the third signal output end of the acquisition unit is connected with the third signal input end of the control unit.

5. The elevator braking system of claim 3, wherein the acquisition unit comprises:

and one end of the dry contact switch forms the fourth signal input end of the acquisition unit, the other end of the dry contact switch forms the third signal output end of the acquisition unit, and the dry contact switch is a normally open switch.

6. The elevator braking system of claim 4, further comprising:

and the safety unit is connected with the control unit and is used for controlling the normal operation of the elevator.

7. The elevator braking system of claim 6, wherein the safety unit includes at least one second switch;

the second switch is a relay contact switch in the relay, and the second switch is a normally closed switch.

8. A machine control method in an elevator braking system, characterized in that the elevator braking system comprises a brake fitted in connection with the elevator machine and the travel space of the elevator, the method comprising:

acquiring a trigger signal of an obstacle in a safety operation area of an elevator;

and controlling the delayed contracting brake speed of the brake according to the trigger signal.

9. Machine control method in an elevator braking system according to claim 8, characterized in that the elevator braking system further comprises a safety unit for controlling the normal operation of the elevator; further comprising:

and controlling the circuit in the safety unit to be disconnected according to the trigger signal.

10. Elevator system, characterized in that it comprises an elevator brake system according to claims 1-7.

Technical Field

The invention relates to the field of elevators, in particular to an elevator braking system, a machine control method and an elevator system.

Background

The electromagnetic friction type brake is characterized in that a magnetic field is generated by electrifying an exciting coil, an armature is attracted by a magnetic yoke and is braked by a coupling flange, and the braking mode of the armature can be divided into electrifying braking and power-off braking. The working process of the brake when the elevator is switched from the running state to the stopping state is as follows: when the tractor is in power failure and no current flows through a coil of the electromagnetic friction type brake, the magnetic force in the electromagnetic iron core (magnetic yoke) disappears rapidly, the brake tile (armature) loses attraction, the brake tile (armature) locks the traction wheel under the action of the pressure of the brake spring, and the elevator stops working. The working process of the brake when the elevator is switched from the stop state to the running state is as follows: at the moment when the tractor is electrified and rotates, current is simultaneously passed through a coil of the electromagnetic friction type brake, an electromagnetic iron core (magnetic yoke) is rapidly magnetized, magnetic attraction is generated on a brake tile (armature), when the magnetic force applied to the brake tile (armature) is greater than the pressure of a brake spring, the brake tile is opened and is completely separated from a traction sheave, the traction sheave can rotate, and the elevator can move.

In summary, the existing elevator brake will act immediately after being triggered, the traction sheave is quickly embraced, and the elevator stops working. At this time, if the elevator is in an up-and-down running state, the process of decelerating and stopping the elevator car is very quick, the acceleration is large, and passengers are easy to feel uncomfortable.

Disclosure of Invention

Aiming at the problem that passengers are uncomfortable due to large acceleration when the existing elevator car stops, the elevator braking system, the machine control method and the elevator system which aim at delaying the brake-contracting speed of an elevator brake are provided.

The present invention provides an elevator braking system, comprising:

a brake assembled in conjunction with a hoist and a running space of the elevator, for braking a band-type brake to stop the elevator from running when the elevator is running;

further comprising:

the acquisition unit is used for acquiring a trigger signal of an obstacle in a safety operation area of the elevator;

the braking delay unit is connected with the brake and used for delaying the brake contracting speed of the brake;

and the control unit is connected with the acquisition unit and the braking delay unit, and when the acquisition unit acquires the trigger signal, the control unit is used for controlling the delayed band-type brake speed of the brake through the braking delay unit.

Optionally, the collecting unit adopts a light curtain trigger sensor.

Optionally, the braking delay unit includes:

the first signal output end is connected with the brake;

the first signal input end is connected with the control unit;

the second signal input end is connected with the control unit;

an electromagnetic induction coil, one end of which forms the second signal input end;

the cathode of the diode is connected with the other end of the electromagnetic induction coil to form the first signal output end, and the anode of the diode forms the first signal input end;

the control unit comprises the first switch, one end of the first switch is connected with the first signal input end, and the other end of the first switch is connected with the second signal input end.

Optionally, the control unit further includes a third signal input terminal and a second signal output terminal;

further comprising: a power supply unit;

the negative electrode of the power supply unit is connected with the second signal output end of the control unit;

the acquisition unit comprises a fourth signal input end and a third signal output end, the fourth signal input end of the acquisition unit is connected with the positive electrode of the power supply unit, and the third signal output end of the acquisition unit is connected with the third signal input end of the control unit.

Optionally, the collecting unit includes:

and one end of the dry contact switch forms the fourth signal input end of the acquisition unit, the other end of the dry contact switch forms the third signal output end of the acquisition unit, and the dry contact switch is a normally open switch.

Optionally, the method further includes:

and the safety unit is connected with the control unit and is used for controlling the normal operation of the elevator.

Optionally, the safety unit comprises at least one second switch;

the second switch is a relay contact switch in the relay, and the second switch is a normally closed switch.

The invention also provides a machine control method in an elevator braking system comprising a brake fitted in conjunction with a hoisting machine and a running space of an elevator, the method comprising:

acquiring a trigger signal of an obstacle in a safety operation area of an elevator;

and controlling the delayed contracting brake speed of the brake according to the trigger signal.

Optionally, the elevator braking system further comprises a safety unit for controlling normal operation of the elevator; further comprising:

and controlling the circuit in the safety unit to be disconnected according to the trigger signal.

The invention further provides an elevator system which comprises the elevator braking system.

The beneficial effects of the above technical scheme are that:

in the technical scheme, the elevator braking system acquires a trigger signal of an obstacle in a safe operation area of the elevator; when the acquisition unit acquires the trigger signal, the control unit controls the delayed contracting brake speed of the brake through the brake delay unit, the action time of the brake is prolonged, the vibration of the elevator after the brake of the elevator is closed is reduced, and the acceleration is reduced, so that the purpose of improving the comfort of passengers is achieved.

Drawings

Fig. 1 is a block diagram of one embodiment of an elevator braking system according to the present invention;

FIG. 2 is a circuit diagram of one embodiment of the braking delay unit of the present invention;

FIG. 3 is a schematic diagram of the electrical connections between the control unit and the acquisition unit and the power supply unit in the elevator braking system of the present invention;

fig. 4 is a block diagram of another embodiment of an elevator braking system according to the present invention;

fig. 5 is a method flow diagram of an embodiment of a method of controlling a machine in an elevator braking system according to the invention.

Detailed Description

The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one type of device from another. For example, a first switch may also be referred to as a second switch, and similarly, a second signal input may also be referred to as a first signal input, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

In the description of the present invention, it should be understood that the numerical references before the steps do not identify the order of performing the steps, but merely serve to facilitate the description of the present invention and to distinguish each step, and thus should not be construed as limiting the present invention.

The elevator braking system, the machine control method and the elevator system provided by the embodiment can be applied to elevators which are installed in buildings or other buildings and used for carrying people and goods. The elevator braking system collects a trigger signal of an obstacle in a safe operation area of the elevator; when the acquisition unit acquires the trigger signal, the control unit controls the delayed contracting brake speed of the brake through the brake delay unit, the action time of the brake is prolonged, the vibration of the elevator after the brake of the elevator is closed is reduced, and the acceleration is reduced, so that the purpose of improving the comfort of passengers is achieved.

Example one

Referring to fig. 1, the present embodiment provides an elevator braking system 1 that may include: the device comprises a brake 11, a collecting unit 12, a brake time delay unit 13 and a control unit 14.

And a brake 11 assembled in conjunction with the elevator and the operating space of the elevator, for braking the band-type brake to stop the operation of the elevator when the elevator is operated.

In the present embodiment, the brake 11 adopts a power-off braking method. The brake 11 can be fitted in conjunction with the hoisting machine of the elevator, for example: so that when the brake 11 is engaged the brake pads are against the braking surface attached to the traction sheave, the brake drum against which the brake pads are against can also be arranged separately from the traction sheave.

And the acquisition unit 12 is used for acquiring a trigger signal of an obstacle in a safety operation area of the elevator.

The safety work area can be located above (or below) the elevator level or below (or above) the elevator car in the travel path of the elevator car. The safe working area can also be a door area protection area of the car door.

In this embodiment, the collecting unit 12 may adopt a light curtain triggering sensor.

In practical applications, the light curtain triggering sensor can be arranged in a hoistway of an elevator and also can be arranged at the lower part (or the upper part) of an elevator car. And triggering a sensor to cover the safe operation area through the light curtain. In the ascending or descending process of the elevator, if the acquisition unit 12 acquires the barrier in the safe operation area, a trigger signal is generated to indicate that the elevator needs to be switched from the running state to the stopping state.

And the braking delay unit 13 is connected with the brake 11 and used for delaying the brake-contracting speed of the brake 11.

Further, the braking delay unit 13 shown in fig. 2 may include: a first signal output terminal A3, a first signal input terminal A2, a second signal input terminal A1, an electromagnetic coil L and a diode D.

The first signal output terminal a3 is connected to the actuator 11.

A first signal input a2 is connected to the control unit 14.

A second signal input a1 is connected to the control unit 14.

An electromagnetic induction coil L, one end of which forms the second signal input terminal a 1;

the cathode of the diode D is connected with the other end of the electromagnetic induction coil L to form the first signal output end A3; the anode of diode D forms the first signal input a 2.

Specifically, the diode D may be a freewheeling diode having a current flow direction opposite to that of the electromagnetic induction coil L.

And the control unit 14 is connected with the acquisition unit 12 and the braking delay unit 13, and when the acquisition unit 12 acquires the trigger signal, the control unit is used for controlling the delayed brake speed of the brake 11 through the braking delay unit 13.

Further, the control unit 14 comprises the first switch GM1, a third signal input and a second signal output.

Specifically, the control unit 14 may employ a relay, and the relay GM may employ a safety relay. The first switch GM1 is a safety contact switch.

The control unit 14 is connected to the braking delay unit 13 through a first switch GM1, referring to fig. 2, one end of the first switch GM1 is connected to the anode (a first signal input terminal a2) of the diode D, the other end of the first switch GM1 is connected to one end (a second signal input terminal a1) of the electromagnetic induction coil L, and the first switch GM1 is a normally open switch.

In the present embodiment, when the trigger signal (i.e., no obstacle) is not checked in the safe working area, the first switch GM1 in the control unit 14 is kept in a normally open state, not actuated, and the brake delay circuit is not operated. When the safety operation area detects a trigger signal (i.e. no obstacle), the first switch GM1 in the control unit 14 is in a closed state, the braking delay loop is in effect, the electric energy of the electromagnetic induction coil L is slowly released through the diode D, the power-off process of the electromagnetic induction coil L is prolonged, the brake-holding process of the brake 11 is slowed, and the brake-holding time reaches a preset time (e.g. 800 ms).

The elevator braking system 1 shown with reference to fig. 3 and 4 may further include: a power supply unit 15;

the negative electrode of the power supply unit 15 is connected with the second signal output end of the control unit 14; the acquisition unit 12 comprises a fourth signal input end and a third signal output end, the fourth signal input end of the acquisition unit 12 is connected with the positive electrode of the power supply unit 15, and the third signal output end of the acquisition unit 12 is connected with the third signal input end of the control unit 14.

In this embodiment, the power supply unit 15 may use a dc power source, such as a 24V dc power source. The relay GM is a multi-contact relay, and when the control signal of the relay GM reaches a preset threshold (e.g., 24V), the braking delay unit 13 and the safety unit can be controlled by switching on, switching off, or switching on the multi-path circuit through a plurality of contact sets at the same time.

In one embodiment, the acquisition unit 12 may include:

and the dry contact switch K, one end of the dry contact switch K is formed into the fourth signal input end of the acquisition unit 12, the other end of the dry contact switch K is formed into the third signal output end of the acquisition unit 12, and the dry contact switch K is a normally open switch.

Referring to fig. 3, one end of the dry contact switch K is connected to the positive electrode of the power supply unit 15, the other end of the dry contact switch K is connected to one end (third signal input end) of the relay GM, and the other end (second signal output end) of the relay GM is connected to the negative electrode of the power supply unit 15.

In the present embodiment, when the trigger signal (i.e., no obstacle) is not detected in the safe working area, the light curtain trigger sensor is not triggered, the dry contact switch K remains in the normally open state and is not actuated, and the switch in the control unit 14 is also not actuated. When the trigger signal (i.e. no obstacle) is not detected in the safe working area, the light curtain trigger sensor is triggered, the dry contact switch K is closed, the switch in the control unit 14 is closed (i.e. the switch in the relay GM is opened), and the first switch GM1 is closed.

In a preferred embodiment, the elevator braking system 1 shown with reference to fig. 4 may further include: a security unit 16.

And the safety unit 16 is connected with the control unit 14 and used for controlling the normal operation of the elevator.

In this embodiment, the safety unit 16 may include at least one second switch; the second switch is a relay contact switch in the relay GM, and the second switch is a normally closed switch.

Further, the second switch is a safety contact switch.

Based on the above implementation, when the trigger signal (i.e. no obstacle) is not detected in the safety working area, the light curtain trigger sensor does not trigger, the dry contact switch K remains in a normally open state and does not operate, the switch in the control unit 14 does not operate, the second switch in the safety unit 16 is in a normally closed state and does not operate, and the elevator operates normally. When the trigger signal (namely, no obstacle) is not detected in the safety working area, the light curtain trigger sensor triggers, the dry contact switch K is closed, the switch in the control unit 14 is closed, the first switch GM1 is closed, the second switch in the safety unit 16 is closed, the normal open state is achieved, and the elevator stops running.

In this embodiment the safety unit 16 is a safety circuit consisting of all safety switches of the elevator connected in series. The elevator can only be operated electrically if all the second switches are switched on. The safety unit 16 is an accessory unit, the absence of which does not affect the normal operation of the elevator, and is primarily intended to ensure safe operation of the elevator.

In this embodiment, when the acquisition unit 12 acquires the trigger signal, the electric energy of the upper electromagnetic induction coil L in the braking delay unit 13 is slowly released through the diode D, the brake speed of the brake 11 is reduced, meanwhile, the safety unit 16 is disconnected, and the elevator is slowly decelerated until stopping, so that the acceleration of the elevator car when stopping can be reduced, and the riding comfort is improved.

In the embodiment, the elevator braking system 1 acquires the trigger signal of the obstacle in the safe operation area of the elevator through the acquisition unit 12; when the acquisition unit 12 acquires the trigger signal, the control unit 14 controls the delayed contracting brake speed of the brake 11 through the brake delay unit 13, so that the action time of the brake 11 is prolonged, the vibration of the elevator after the elevator brake 11 is closed is reduced, and the acceleration is reduced, thereby achieving the purpose of improving the comfort of passengers.

Example two

Referring to fig. 5, the present embodiment provides a machine control method in an elevator braking system 1, the elevator braking system 1 including a brake 11 fitted in conjunction with a hoist and a running space of an elevator, the method including the steps of:

s1, acquiring a trigger signal of an obstacle in a safety operation area of the elevator.

The safety work area can be located above (or below) the elevator level or below (or above) the elevator car in the travel path of the elevator car. The safe working area can also be a door area protection area of the car door.

In this embodiment, a light curtain trigger sensor may be used to collect the trigger signal.

In practical applications, the light curtain triggering sensor can be arranged in a hoistway of an elevator and also can be arranged at the lower part (or the upper part) of an elevator car. And triggering a sensor to cover the safe operation area through the light curtain. In the ascending or descending process of the elevator, if the acquisition unit acquires the barrier in the safe operation area to generate a trigger signal, the elevator needs to be switched from the running state to the stopping state.

And S2, controlling the delayed contracting brake speed of the brake according to the trigger signal.

In the present embodiment, when the safety work area detects a trigger signal (i.e. no obstacle), the first switch GM1 in the control unit 14 is activated to be in a closed state, the braking delay circuit is activated, the power of the electromagnetic induction coil L is slowly released through the diode D, the power loss process of the electromagnetic induction coil L is prolonged, the braking process of the brake 11 is slowed, and the braking time reaches a preset time (e.g. 800 ms).

In a preferred embodiment, the elevator braking system 1 further comprises a safety unit 16 for controlling normal operation of the elevator, and the machine control method in the elevator braking system 1 may further comprise:

and S3, controlling the circuit in the safety unit to be disconnected according to the trigger signal.

In this embodiment, the safety unit may comprise at least one second switch; the second switch is a relay contact switch in the relay GM, and the second switch is a normally closed switch.

Further, the second switch is a safety contact switch.

Based on the above implementation, when the trigger signal (i.e. no obstacle) is not detected in the safety working area, the light curtain trigger sensor does not trigger, the dry contact switch K remains in the normally open state and does not operate, the switch does not operate, the second switch in the safety unit 16 is in the normally closed state and does not operate, and the elevator operates normally. When the trigger signal (namely, no obstacle) is not detected in the safety working area, the light curtain trigger sensor triggers, the dry contact switch K is closed, the switch is closed, the first switch GM1 is closed, the second switch in the safety unit 16 is closed, the normal open state is achieved, and the elevator stops running.

In this embodiment the safety unit 16 is a safety circuit consisting of all safety switches of the elevator connected in series. The elevator can only be operated electrically if all the second switches are switched on. The safety unit 16 is an accessory unit, the absence of which does not affect the normal operation of the elevator, and is primarily intended to ensure safe operation of the elevator.

In the embodiment, the machine control method in the elevator braking system 1 collects the trigger signal of the obstacle in the safe operation area of the elevator; when the trigger signal is acquired, the action time of the brake 11 is increased by controlling the delayed brake speed of the brake 11, the vibration of the elevator after the elevator brake 11 is closed is reduced, and the acceleration is reduced, so that the purpose of improving the comfort of passengers is achieved.

EXAMPLE III

The embodiment also provides an elevator system comprising the elevator braking system 1 of the first embodiment.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.