CN218088508U

CN218088508U - Staircase control circuit and staircase system

Info

Publication number: CN218088508U
Application number: CN202222313673.5U
Authority: CN
Inventors: 仇俊彦; 梁金发; 凌思华
Original assignee: Winone Elevator Co Ltd
Current assignee: Winone Elevator Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-12-20
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a staircase control circuit and staircase system. The escalator control circuit is used for controlling an escalator main machine and comprises a main board, a safety relay and a frequency converter. The main board is used for generating a reset signal in the target landing occasion. The safety relay is connected with the main board and is used for being switched on under the condition of receiving the reset signal and being switched off after preset time. The frequency converter is connected with the safety relay and used for working under the condition that the safety relay is switched on so as to control the frequency conversion brake of the escalator main machine and stop working under the condition that the safety relay is switched off. And the escalator main machine contracting brake acts under the condition that the safety relay is disconnected. Therefore, the escalator main machine is decelerated through variable-frequency braking, the abrasion of a liner caused by direct contracting brake can be avoided, and accidents caused by falling of passengers can be avoided as much as possible.

Description

Staircase control circuit and staircase system

Technical Field

The utility model relates to an staircase technical field more specifically involves an staircase control circuit and staircase system.

Background

In order to facilitate the circulation of people in public places, the arrangement of the escalator is more and more favored by people. In the related art, the escalator brake generally directly breaks an escalator operation signal, and the escalator is directly subjected to friction brake after a host contracting brake is powered off. The main machine brake causes severe abrasion of the liner and is easy to cause accidents when passengers fall down.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an staircase control circuit and staircase system.

The utility model discloses embodiment's staircase control circuit is used for controlling the staircase host computer, staircase control circuit includes mainboard, safety relay, converter, the mainboard is used for generating reset signal under the target occasion of stopping the ladder, safety relay with the mainboard connection, safety relay is used for receiving switch on and break off after the time of predetermineeing under the condition of reset signal, the converter with safety relay connects, the converter is used for work is in order to control under the condition that safety relay switches on staircase host computer frequency conversion braking is in stop work under the condition of safety relay disconnection the staircase host computer band-type brake action under the condition of safety relay disconnection.

In certain embodiments, the target landing scenario includes, but is not limited to, an automatically operated stop run, a manually operated emergency stop switch, a foreign object trap, a step, or a step down.

In some embodiments, the frequency converter is used for operating in a target mode under the condition that the safety relay is switched on so as to control the frequency conversion brake of the escalator main machine, and different target modes correspond to different brake and stop distances and different deceleration times.

In some embodiments, the braking distance is within a preset braking distance range.

In some embodiments, the total braking time is no more than 4 seconds.

In some embodiments, the escalator control circuit further comprises a safety circuit board, the safety circuit board is connected with the frequency converter, and the safety circuit board is used for controlling the escalator main machine to perform contracting brake action when the frequency converter works and detects that the escalator main machine fails.

In some embodiments, the escalator control circuit further comprises a safety circuit board and a speed sensor, the safety circuit board is connected with the frequency converter and the speed sensor respectively, and the safety circuit board is used for controlling the operation of the escalator main machine brake under the condition that the frequency converter works and the speed sensor detects that the speed of the escalator is less than the preset speed.

In some embodiments, the escalator control circuit further comprises a resistor, and the frequency converter is connected to the resistor such that the resistor dissipates energy.

In certain embodiments, the frequency converter comprises an energy regenerative frequency converter.

In some embodiments, the escalator system of the present invention includes the escalator control circuit and the escalator main machine of any one of the above, wherein the escalator control circuit is used for controlling the escalator main machine.

The utility model discloses among embodiment's staircase control circuit and staircase system, stop the occasion at the target and pass through safety relay control converter work and predetermine the time and brake in order to control staircase host computer frequency conversion, control staircase host computer band-type brake action again and realize stopping the ladder, so, the staircase host computer slows down through frequency conversion braking earlier, can avoid the liner wearing and tearing that direct band-type brake caused to can avoid the passenger to fall down to take place accident as far as possible.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of an escalator control circuit in accordance with certain embodiments of the present invention.

Fig. 2 is a schematic diagram of a hardware circuit of an escalator control circuit according to certain embodiments of the present invention.

Fig. 3 is a logic control schematic diagram of an escalator control circuit according to certain embodiments of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In order to facilitate the circulation of people in public places, the arrangement of the escalator is more and more favored by people. In the related art, the escalator brake generally directly cuts off an escalator operation signal, so that the direct friction brake is carried out on the escalator after the power failure of a main machine band-type brake. The main machine internal contracting brake causes the pad to be worn seriously and is easy to cause the accident of falling of passengers.

The utility model discloses embodiment's staircase control circuit 1000 can be used for controlling staircase host computer 10, and staircase control circuit 1000 includes mainboard 100, safety relay 200 and converter 300. The main board 100 is used for generating a reset signal in a target landing situation. The safety relay 200 is connected to the main board 100, and is turned on after receiving the reset signal and turned off after a preset time. The frequency converter 300 is connected with the safety relay 200 and is used for controlling the frequency conversion brake of the escalator main machine 10 under the condition that the safety relay 200 is conducted. When the safety relay 200 is turned off, the escalator main machine 10 is contracting brake.

The utility model discloses an among the staircase control circuit 1000, stop the ladder occasion at the target and pass through the work of safety relay 200 control converter 300 and predetermine the time and brake with the 10 frequency conversion of control staircase host computer, control 10 band-type brakes of staircase host computer actions realization stop the ladder again, so, staircase host computer 10 slows down through the frequency conversion braking earlier, can avoid the liner wearing and tearing that direct band-type brake caused to can avoid the passenger to fall down accident as far as possible.

In some embodiments, the escalator control circuit 1000 further includes a safety circuit 400, and in the target landing situation, the safety circuit 400 is disconnected, and in the embodiments of the present invention, a core component safety relay 200 is added, which functions to maintain the operation signal voltage when the safety circuit 400 is disconnected, so that the frequency converter 300 can work to control the frequency conversion brake of the escalator main machine 10.

The target landing locations for the escalator control circuit 1000 are automatic operation stops, manual operation emergency stop switches, foreign object entrapment, steps or tread depression. In the case of a stop of the operation of the escalator or moving walkway, the control system should be such that the escalator or moving walkway is stopped after a sufficient time (at least 10s plus the time of the intended transport of the user) has elapsed after the user has activated the control element. The manually operated emergency stop switches should be located in a distinct and easily accessible position near the escalator doorway, and the distance between the emergency stop switches should meet the requirements of not more than 30m, and in order to ensure this distance, additional emergency stop switches should be provided if necessary. The emergency stop switch should comply with the electrical safety devices prescribed by the standards. The escalator control circuit 1000 performs a braking operation at a target event: foreign matters are clamped at the positions where the steps, the pedals or the adhesive tapes enter the comb plate; one of the continuous escalators without the intermediate exit stops running, or the exit of the escalator is blocked by a building structure; foreign matters are clamped in the handrail belt inlet; sagging of the step or tread; the handrail belt speed deviates from the actual speed of the steps, pallets or tape by more than-15% and the duration is more than 15. Under the target event, the escalator enters a braking state, and belongs to a target stop occasion. All the ladder stopping conditions are listed in a classified mode, and the occasions where the variable frequency brake can be used and does not violate the standard are selected, so that the escalator brake mode is enriched, and the loss of the brake to the pad is reduced.

In some embodiments, the frequency converter 300 in the escalator control circuit 1000 is used to operate in a target operation mode to control the variable frequency braking of the escalator main machine 10 under the condition that the safety relay 200 is turned on, and different target modes correspond to different braking and stopping distances and different deceleration times.

Therefore, the frequency converter 300 can be controlled to work in different target working modes, so that the braking and stopping distance and the deceleration time of the escalator are controlled, and the escalator can be suitable for different use occasions.

Specifically, in one embodiment, in the first target operation mode, the braking distance is 600mm, and the deceleration time is 1.4s; under the second target working mode, the braking distance is 750mm, and the deceleration time is 1.8s; in the third target operation mode, the braking distance is 900mm, and the deceleration time is 2.2s. So, set for frequency conversion braking deceleration time, make to staircase deceleration, brake distance accords with the standard to can provide the invariable brake distance of many grades and supply the customer to select, can also reduce the passenger and fall down the risk.

The stopping distance in the escalator control circuit 1000 is within a preset stopping distance range. Specifically, the stopping distance standards of the escalator running downwards under no load and load are as follows: under the condition that the nominal speed is 0.50m/s, the braking distance range is 0.20-1.00 m; under the condition that the nominal speed is 0.65m/s, the braking distance range is 0.30-1.30 m; the stopping distance ranges from 0.40 to 1.50m at a nominal speed of 0.75 m/s. When the escalator moves downwards, the deceleration in the running direction in the brake braking process is not more than 1m/s ² . The original deceleration signal should be filtered through a 4.0Hz two-step Butterworth (2-pole Butterworth) filter.

The preset time in the escalator control circuit 1000 comprises 2 seconds. Specifically, if the frequency conversion process exceeds 2 seconds and the contracting brake of the escalator main machine 10 is not triggered, the safety relay 200 disconnects the running signal and triggers the contracting brake. Therefore, the whole braking time of variable frequency braking and band-type brake braking can be ensured to be not more than 4 seconds. Of course, in other embodiments, the preset time may also be 1.5 seconds, 1.7 seconds, 2.3 seconds, 2.5 seconds, etc., so that the total braking time does not exceed 4 seconds, which is not limited herein.

The escalator control circuit 1000 further comprises a safety circuit board 500, the safety circuit board 500 is connected with the frequency converter 300, and the safety circuit board 500 is used for controlling the brake action of the escalator main machine 10 when the frequency converter 300 works and detects that the escalator main machine 10 has a fault.

Specifically, if the frequency converter 300 does not respond during the variable frequency braking process, the safety circuit 400 is disconnected, which triggers the brake operation of the escalator main machine 10. Therefore, the safety of passengers in the frequency conversion process is ensured.

The escalator control circuit 1000 comprises a speed sensor 700, the safety circuit board 500 is respectively connected with the frequency converter 300 and the speed sensor 700, and the safety circuit board 500 is used for controlling the brake action of the escalator main machine 10 when the frequency converter 300 works and the speed sensor 700 detects that the speed of the escalator is less than the preset speed.

In particular, in some embodiments, the safety circuit board 500 and the main board 100 may be integrated, that is, the main board 100 needs to be modified to enable the main board 100 to implement additional functions of monitoring the safety relay 200, resetting the safety relay 200, monitoring the state of the frequency converter 300, and calculating the speed of the escalator during braking. In other embodiments, the security circuit board 500 and the main board 100 may be separately disposed, and are not particularly limited herein.

In this way, the main drive speed sensor 700 monitors the speed change of the escalator under the variable frequency brake, and in one embodiment, the main board 100 interrupts the operation command and the variable frequency brake before triggering the low speed protection of the escalator, so that the main operating unit 10 is actuated to brake. For example, if the condition for triggering the low speed protection of the escalator is that the speed of the escalator is less than 15% of the nominal speed, the preset speed may be 20% of the nominal speed, that is, the safety circuit board 500 is used to control the locking action of the escalator main machine 10 if the frequency converter 300 is operated and the speed sensor 700 detects that the speed of the escalator is less than 20% of the nominal speed. Regarding the safety function, the escalator control circuit 100 needs to be authenticated with a third-party safety level. In addition, the security circuit board 500 may be an FCSC security circuit board, and may perform security authentication through a PESSRAE (programmable electronic security related system) authentication loop.

In some embodiments, the safety circuit board 500 is used to control the contracting brake action of the escalator main machine 10 when the frequency converter 300 is operated and the speed sensor 700 detects that the speed of the escalator is greater than a set speed. For example, the set speed may be 120% of the nominal speed, that is, the safety circuit board 500 is used to control the locking action of the escalator main machine 10 if the frequency converter 300 is operated and the speed sensor 700 detects that the speed of the escalator is greater than 120% of the nominal speed.

The escalator control circuit 1000 also includes a resistor 900 and the frequency converter 300 is connected to the resistor 900 such that the resistor 900 consumes energy.

The frequency converter 300 in the escalator control circuit 1000 comprises an energy regeneration frequency converter. And an energy regeneration frequency converter is used for feeding energy generated by braking back to the power grid, so that energy conservation is realized.

The escalator system comprises an escalator control circuit 1000 and an escalator main machine 10, wherein the escalator control circuit 1000 is used for controlling the escalator main machine 10.

Specifically, in one embodiment, the safety relay 200 controls the frequency converter 300 to operate for a preset time to control the frequency conversion braking of the escalator main machine 10 in a target elevator stopping occasion, and then controls the contracting brake action of the escalator main machine 10 to realize elevator stopping.

The escalator main machine 10 is controlled through variable frequency braking, so that the abrasion of the lining caused by the contracting brake of the escalator main machine 10 is reduced, and the condition that passengers fall down accidentally is reduced.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the term "connected" is to be understood broadly, and may include, for example, a fixed connection, a removable connection, or an integral connection; may include direct connection, indirect connection through an intermediary, and communication between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An escalator control circuit, characterized in that, the escalator control circuit is used for controlling the escalator host computer, the escalator control circuit includes:

the main board is used for generating a reset signal in a target elevator stopping occasion;

the safety relay is connected with the main board and is used for being switched on under the condition of receiving the reset signal and being switched off after preset time;

the frequency converter is connected with the safety relay and used for working under the condition that the safety relay is switched on so as to control the frequency conversion brake of the escalator main machine and stop working under the condition that the safety relay is switched off;

and when the safety relay is switched off, the escalator main machine brake acts.

2. The escalator control circuit of claim 1, wherein the targeted landing locations include, but are not limited to, automatic stop operation, manually operated emergency stop switches, foreign object entrapment, steps or tread depression.

3. Escalator control circuit according to claim 1, characterized in that the frequency converter is designed to operate in a targeted manner for controlling the variable-frequency braking of the escalator main machine with the safety relay switched on, different targeted manners corresponding to different braking distances and different deceleration times.

4. The escalator control circuit of claim 3, wherein the stopping distance is within a preset stopping distance range.

5. Escalator control circuit according to claim 1, characterized in that the total braking time does not exceed 4 seconds.

6. The escalator control circuit according to claim 1, further comprising a safety circuit board connected to the frequency converter, wherein the safety circuit board is configured to control the operation of the escalator main unit when the frequency converter is in operation and the escalator main unit is detected to be out of order.

7. The escalator control circuit according to claim 1, further comprising a safety circuit board and a speed sensor, wherein the safety circuit board is connected to the frequency converter and the speed sensor, respectively, and the safety circuit board is configured to control the operation of the main escalator brake when the frequency converter operates and the speed sensor detects that the speed of the escalator is lower than a preset speed.

8. The escalator control circuit of claim 1, further comprising a resistor, wherein the frequency converter is connected to the resistor such that the resistor dissipates energy.

9. Escalator control circuit according to claim 1, characterized in that the frequency converter comprises an energy regenerative frequency converter.

10. An escalator system, comprising the escalator control circuit of any one of claims 1-9 and an escalator main machine, wherein the escalator control circuit is used for controlling the escalator main machine.