CN111532927B - Elevator, computer device, readable storage medium and method for controlling car stop - Google Patents
Elevator, computer device, readable storage medium and method for controlling car stop Download PDFInfo
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- CN111532927B CN111532927B CN202010235614.3A CN202010235614A CN111532927B CN 111532927 B CN111532927 B CN 111532927B CN 202010235614 A CN202010235614 A CN 202010235614A CN 111532927 B CN111532927 B CN 111532927B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
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- 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
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an elevator, computer equipment, a readable storage medium and a method for controlling the stop of a car, wherein the method for controlling the stop of the car comprises the following steps: obtaining car running speed information and car position information; calculating to obtain a first braking distance according to the running speed information of the car and the deceleration information of the brake; calculating to obtain a safety distance according to the position information of the lift car; when the first braking distance is smaller than the safety distance, a brake command is sent; and when the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs. The elevator, the computer equipment, the readable storage medium and the method for controlling the car to stop can further improve the running safety of the car, and can selectively cancel the buffer under the condition of ensuring the safe running of the car, thereby being beneficial to reducing the installation cost and the operation cost of the elevator.
Description
Technical Field
The invention relates to the technical field of lifting, in particular to an elevator, computer equipment, a readable storage medium and a method for controlling the stop of a car.
Background
The elevator carries out top-rushing and bottom-squatting protection on the lift car through three safety components such as a speed limiter, a mechanical safety gear and a buffer, so that the equipment is not seriously damaged and the personal safety of passengers is guaranteed.
In the traditional car operation process, the mechanical safety gear can act only after the limiter acts. When the steel wire rope is broken or the traction condition is lost, the main machine brake cannot enable the car to decelerate by tightly holding the traction wheel, and when the speed of the main machine brake does not trigger the limiting stopper, the electric safety tongs cannot act and can only rely on the buffer to implement protection.
The buffer requires a larger pit depth, resulting in higher installation cost. In addition, the buffer must be maintained in time, increasing maintenance costs.
Disclosure of Invention
Therefore, there is a need for an elevator, a computer device, a readable storage medium, and a method for controlling a car to stop, which can further improve the safety of the car operation, and can selectively cancel a buffer under the condition of ensuring the safe operation of the car, thereby being beneficial to reducing the installation cost and the operation cost of the elevator.
The technical scheme is as follows:
in one aspect, the present application provides a method of controlling car stopping, comprising the steps of:
obtaining car running speed information and car position information;
calculating to obtain a first braking distance according to the running speed information of the car and the deceleration information of the brake;
calculating to obtain a safety distance according to the position information of the lift car;
when the first braking distance is smaller than the safety distance, a brake command is sent;
and when the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs.
The electric safety tongs and the brake can be electrically controlled and are in communication connection with the elevator controller, the deceleration information of the brake can be stored in the elevator controller in advance, and then the brake is controlled to hold the traction sheave tightly by using a brake command, or the electric safety tongs are controlled to clamp the guide rail tightly by using a brake command of the electric safety tongs. When the method for controlling the car to stop is used, the running speed information and the position information of the car are obtained through any one of the prior art, and then the first braking distance and the safety distance are respectively calculated by processing the running speed information and the position information of the car; when the first braking distance is smaller than the safety distance, a brake command of the brake is sent, and the brake command is further utilized to control the brake to tightly hold the traction sheave, so that the braking of the lift car is realized (namely the lift car stops); and if the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs, and further, utilizing the braking instruction of the electric safety tongs to clamp the guide rail to realize the braking of the lift car. Therefore, by using the method for controlling the car to stop, the car can be safely stopped by fully utilizing the braking functions of the brake and the electric safety tongs, so that the car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
The technical solution is further explained below:
in one embodiment, before sending the brake braking command or before sending the electric safety gear braking command, the method further comprises the following steps:
acquiring car deceleration information;
if the car deceleration information conforms to a preset deceleration rule, not sending a brake command and not sending a brake command of the electric safety tongs;
if the car deceleration information does not accord with a preset deceleration rule and the first braking distance is smaller than the safety distance, a brake command is sent;
or if the car deceleration information does not accord with the preset deceleration rule and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
In one embodiment, before obtaining the car deceleration information, the method further comprises the following steps:
after receiving a descending command of the car, the car reaches a first preset time or the car descends a first preset distance, and whether the car descends at a reduced speed is judged;
if the cage descends at a deceleration state, forming cage deceleration information;
if the lift car does not decelerate downwards and the first braking distance is smaller than the safety distance, a brake command is sent;
or if the car does not decelerate and goes down and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
In one embodiment, after the brake braking command is sent, the method further comprises the following steps:
after reaching a second preset time or descending a second preset distance, acquiring speed information of the car after stopping;
and if the speed information after the car is stopped does not accord with the brake stopping and decelerating rule, sending a braking instruction of the electric safety gear.
In one embodiment, the method of controlling car stopping further comprises the steps of:
judging whether the steel wire rope is broken or not;
and if the steel wire rope is broken, sending a braking instruction of the electric safety gear.
In one embodiment, calculating the safe distance includes the following steps:
calculating to obtain a safety distance according to the position information of the lift car and the preset stop position;
or according to the position information of the lift car, the position information of the supporting seat and the preset buffer distance are combined, and the safety distance is calculated.
In one embodiment, the method for controlling car stopping further comprises the steps of:
calculating to obtain a second braking distance according to the running speed information of the car and the deceleration information of the electric safety gear, wherein the second braking distance is smaller than the first braking distance;
when the first braking distance is greater than the safety distance and the safety distance is greater than the second braking distance, sending a braking instruction of the electric safety tongs;
and when the safety distance is smaller than the second braking distance, sending a full braking instruction.
In another aspect, the present application further provides a readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method of controlling car stopping as in any of the above embodiments.
The readable storage medium is further used for storing a program for realizing the steps of the method for controlling the stop of the car in any embodiment, and the program is applied to the elevator, so that the brake function of the brake and the braking function of the electric safety gear can be fully utilized, the car can be safely stopped, and the car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
In another aspect, the present application further provides a computer device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method for controlling the car stop according to any of the above embodiments when executing the computer program.
The computer equipment can be used for realizing the method for controlling the car to stop in any embodiment, and the method is applied to the elevator, can fully utilize the braking functions of the brake and the electric safety tongs, so that the car can be safely stopped, and the car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
On the other hand, the application also provides an elevator, which comprises a car, a speed detection device, a position detection device, a supporting seat for supporting the car, an electric safety gear for clamping a guide rail, a brake for tightly holding a traction sheave and computer equipment, wherein the speed detection device is used for detecting the running speed of the car, the position detection device is used for detecting the position of the car in a hoistway, the electric safety gear and the brake are fixedly arranged on the car, the computer equipment is in communication connection with the speed detection device, the position detection device, the electric safety gear and the brake, the computer equipment comprises a memory and a processor, a computer program is stored, and the processor is used for realizing the steps of the method for controlling the car to stop in any one of the embodiments when executing the computer program.
When the elevator operates, the supporting seat is fixedly arranged on the bottom wall of the pit, so that a safe pit maintenance space is conveniently formed; when the car needs to stop, the speed detection device is used for obtaining the running speed information of the car and sending the speed information to the computer equipment, and the position detection device is used for obtaining the position information of the car and sending the speed information to the computer equipment. A processor of the computer equipment processes and calculates a first braking distance according to the running speed information of the elevator car and the deceleration information of the brake stored in the memory; and calculating to obtain the safety distance according to the position information of the car. Then, judging according to a judging unit of the processor, sending a brake instruction when the first braking distance is smaller than the safety distance, and further controlling a brake to tightly hold the traction sheave by using the brake instruction to realize the braking of the lift car (namely the stop of the lift car); and if the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs, and further, utilizing the braking instruction of the electric safety tongs to clamp the guide rail to realize the braking of the lift car. The elevator can fully utilize the braking functions of the brake and the electric safety tongs, so that the elevator car can be safely stopped, and the elevator car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
Drawings
Fig. 1 presents a diagrammatic illustration of an elevator presented in an embodiment;
fig. 2 is a flow diagram of a method of controlling car stopping in one embodiment;
fig. 3 is a logic flow diagram of a method of controlling car stopping in one embodiment;
fig. 4 is a logic flow diagram of a method of controlling car stopping in an embodiment;
FIG. 5 is a schematic flowchart of the process after step S140 shown in FIG. 2;
FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Description of reference numerals:
110. a car; 120. a speed detection device; 130. a position detection device; 140. a supporting seat; 150. electric safety tongs; 160. a brake; 170. a computer device; 180. a guide rail; 190. a traction sheave.
Brief description of the drawingsthe accompanying drawings, which form a part of this application, are included to provide a further understanding of the invention, and are included to explain illustrative embodiments of the invention and the description thereof and are not to be considered limiting of the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
With the popularization of elevators, how to reduce the installation cost and the later maintenance cost is more and more important under the condition of ensuring the operation safety of the elevators.
The traditional elevator carries out top-rushing and bottom-squatting protection on the lift car through three safety parts such as a speed limiter, a mechanical safety gear and a buffer, so that the equipment is not seriously damaged and the personal safety of passengers is guaranteed.
The three safety components complement each other to implement complete speed protection for the elevator, and the speed protection is divided into two parts, namely protection above and below the maximum allowable action speed of the buffer respectively. When the speed of the car is higher than the maximum allowable action speed of the buffer, the speed limiter acts to trigger the action of the electric safety tongs, the electric safety tongs clamp the guide rail, the car is fixed on the guide rail, and the protection can still play a role in protection even if a steel wire rope is broken or the traction condition is lost. When the speed of the cage is lower than the maximum allowable action speed of the buffer, the brake is carried out by the main engine brake. Thus, the speed of the car impacting the buffer is ensured to be always lower than the maximum allowable action speed of the buffer.
When the steel wire rope is broken or the traction condition is lost, the brake can not hold the traction sheave tightly to decelerate the car, and if the falling speed of the car cannot exceed the maximum allowable action speed of the buffer, the car can only depend on the buffer to implement protection. Therefore, in the conventional elevator, a buffer is indispensable. The buffer requires a larger pit depth, resulting in higher installation cost. In addition, the buffer must be maintained in time, increasing maintenance costs.
Therefore, the method for controlling the car to stop by fully utilizing the braking function of the brake and the electric safety tongs under the condition of ensuring the safe operation of the car is necessarily provided. The method for controlling the car to stop can make full use of the braking function of the brake and the electric safety tongs, so that the car can be stopped safely, the buffer can be cancelled, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are reduced.
In order to better explain the method of controlling the stopping of the car, it will be explained by applying it to an elevator.
As shown in fig. 1, in one embodiment, an elevator is provided, which includes a car 110, a speed detection device 120, a position detection device 130, a support base 140, an electric safety gear 150 for clamping a guide rail 180, a brake 160 for holding a traction sheave 190, and a computer device 170, wherein the speed detection device 120 is used for detecting a running speed of the car 110, the position detection device 130 is used for detecting a position of the car 110 in a hoistway, the support base 140 is disposed in a pit, the electric safety gear 150 and the brake 160 are both fixed to the car 110, the computer device 170 is in communication connection with the speed detection device 120, the position detection device 130, the electric safety gear 150 and the brake 160, and the computer device 170 includes a memory and a processor, which stores a computer program, and when the processor executes the steps of the method for controlling the car 110 to stop as described above.
As shown in fig. 2, the method for controlling the stop of the car includes the following steps:
s110, obtaining car running speed information and car position information;
s120, calculating to obtain a first braking distance according to the running speed information of the car and the deceleration information of the brake;
s130, calculating to obtain a safety distance according to the position information of the car;
s140, when the first braking distance is smaller than the safety distance, a brake command is sent;
s150, when the first braking distance is larger than the safety distance, a braking instruction of the electric safety gear is sent.
When the elevator runs, when the elevator car needs to stop, the speed detection device is used for obtaining the running speed information of the elevator car and sending the speed information to the computer equipment, and the position detection device is used for obtaining the position information of the elevator car and sending the speed information to the computer equipment. A processor of the computer equipment processes and calculates a first braking distance according to the running speed information of the elevator car and the deceleration information of the brake stored in the memory; the safety distance is calculated from the car position information, pit position information stored in the memory, and the like. Then, judging according to a judging unit of the processor, sending a brake instruction when the first braking distance is smaller than the safety distance, and further controlling a brake to tightly hold the traction sheave by using the brake instruction to realize the braking of the lift car (namely the stop of the lift car); and if the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs, and further, utilizing the braking instruction of the electric safety tongs to clamp the guide rail to realize the braking of the lift car. The elevator can fully utilize the braking functions of the brake and the electric safety tongs, so that the elevator car can be safely stopped, and the elevator car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
It should be noted that "computer device" includes, but is not limited to, a computer, a controller, a motion control card, and the like.
The "pit" can be implemented using any of the existing technologies. If the pit is a columnar support, the elevator car is prevented from descending and safely entering the pit.
The "speed detection means" may be implemented using any of the existing technologies. Such as a rotary encoder arranged on the shaft of the speed limiter or a speed detection system consisting of a grating ruler with position codes and suspended in a hoistway and a code reading sensor arranged on a car.
The "position detection means" may be implemented using any one of the prior art techniques. Such as a position detecting device composed of a rotary encoder mounted on the governor shaft and a hoistway position correcting device, or a position detecting device composed of a grating ruler with a position code suspended in the hoistway and a code reading sensor mounted on the car.
The "brake" can be implemented using any of the existing technologies. Optionally, the controller disconnects the power supply of the brake, and then the brake acts to hold the traction sheave tightly, so that the braking of the car is realized.
The electric safety gear can be realized by any one of the prior arts. If the electric safety tongs comprise tongs and tongs openers, the tongs are opened when the power is supplied to the tongs openers, the tongs clamp the guide rail when the power is cut off to the tongs openers, the electric safety tongs are driven by the controller, and when the power is cut off to the electric safety tongs by the controller, the electric safety tongs clamp the guide rail to brake and stop the lift car.
It should be noted that the specific structure of the "support seat" may be various, as long as it can support the car to form a pit maintenance safety space.
It should be noted that the operation and connection of the "car" can be implemented by any one of the existing technologies that meet the requirements, and are not described herein again.
It should be noted that the calculation of the "first braking distance" and the "safe distance" may be monitored in real time, may be triggered and calculated according to a trigger condition, and may be set according to actual control requirements.
In addition, the calculation method of the "first stopping distance" may be various, and the calculation method includes the calculation of the car speed information and the deceleration information of the brake, and all the calculation methods are within the protection scope of the present application. The deceleration information of the brake may be preset on the deceleration of the brake, for example, slightly smaller than the rated deceleration.
The "safe distance" may be calculated in various manners as long as it can be obtained by any one of the existing calculation manners according to the car position information. The calculation including the car position information is all within the protection scope of the application.
As shown in fig. 3, on the basis of the above embodiment, in an embodiment, before sending a brake braking command or before sending an electric safety gear braking command, the method further includes the following steps:
acquiring car deceleration information;
if the car deceleration information conforms to a preset deceleration rule, not sending a brake command and not sending a brake command of the electric safety tongs;
if the car deceleration information does not accord with a preset deceleration rule and the first braking distance is smaller than the safety distance, a brake command is sent;
or if the car deceleration information does not accord with the preset deceleration rule and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
So, the in-process of car operation can carry out car information acquisition that slows down earlier to utilize car information that slows down and the rule of predetermineeing of slowing down to carry out the comparison. If the car meets the preset deceleration rule, the car is in a normal running state, the car decelerates normally, at the moment, a brake or electric safety tongs do not need to be started, and the service lives of the brake and the traction wheel, and the service lives of the electric safety tongs and the guide rail are prolonged. If the speed of the elevator car is not consistent with the preset speed reduction rule, the elevator car can be judged to be in an abnormal state, and the speed cannot be reduced normally due to the reasons such as abnormal fault of the frequency converter and the like. At the moment, the deceleration condition of the car needs to be monitored in time, and if the first braking distance is smaller than the safety distance, a brake command is sent; if the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs; the car is braked and stopped, and in the process, alarm information can be sent to remind maintenance personnel to overhaul.
As shown in fig. 4, on the basis of the above embodiment, in an embodiment, before obtaining the car deceleration information, the method further includes the following steps:
after receiving a descending command of the car, the car reaches a first preset time or the car descends a first preset distance, and whether the car descends at a reduced speed is judged;
if the cage descends at a deceleration state, forming cage deceleration information;
if the lift car does not decelerate downwards and the first braking distance is smaller than the safety distance, a brake command is sent;
or if the car does not decelerate and goes down and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
Therefore, after the descending command of the car deceleration is received, the first preset time is reached or the car descends the first preset distance, and then whether the car decelerates or not is carried out. If the elevator car does not descend in a deceleration way, the brake control of the elevator car is immediately carried out, and the safety of the operation of the elevator car is further improved.
Specifically, a brake braking instruction is sent according to the condition that the first braking distance is smaller than the safety distance; and if the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs.
The 'first preset time' and the 'first preset distance' can be set according to control needs, and the specific numerical value meets the requirement of safety control of the car.
As shown in fig. 5, on the basis of any of the above embodiments, in an embodiment, after sending the brake braking command, the method further includes the following steps:
s142, obtaining the speed information of the car after stopping after the car stops after reaching a second preset time or the car descends a second preset distance;
and S144, if the speed information after the car is stopped does not accord with the brake stopping and decelerating rule, sending a braking instruction of the electric safety gear.
So, can further judge the braking effect of stopper, if the stopper damages or the stopper is unusual to lead to the braking effect not good, utilize above-mentioned control step, can in time utilize electronic safety tongs to brake for the car safety stops.
It should be noted that the "brake stopping deceleration law" and the "preset deceleration law" may be pre-stored in the memory, and the specific deceleration law may be obtained by scientific calculation plus buffering time, and is not described herein again in the prior art.
On the basis of any of the above embodiments, in an embodiment, the method for controlling the car to stop further includes the following steps:
judging whether the steel wire rope is broken or not;
and if the steel wire rope is broken, sending a braking instruction of the electric safety gear.
Therefore, the braking instruction of the electric safety tongs can be sent in time, and the electric safety tongs are further used for clamping the guide rail by the braking instruction of the electric safety tongs, so that the braking of the car is realized.
It should be noted that the specific implementation manner of "judging whether the steel wire rope is broken" may be implemented by any one of the prior arts, and is not described herein again. If the running acceleration of the elevator car exceeds a certain preset value, the steel wire rope can be directly judged to be broken. Or, by using other detection elements for detecting the tension of the steel wire rope, when the steel wire rope is suddenly loosened, the steel wire rope breakage information can be sent to the computer equipment.
The specific way for the computer device to obtain the judgment information is easy to belong to the prior art, and is not described herein again.
On the basis of any of the foregoing embodiments, in an embodiment, calculating the safe distance includes the following steps:
calculating to obtain a safety distance according to the position information of the lift car and the preset stop position;
or according to the position information of the lift car, the position information of the supporting seat and the preset buffer distance are combined, and the safety distance is calculated.
Therefore, the braking position information can be preset and stored in the memory, the processor of the computer equipment can directly call the preset braking position information and the car position information to calculate the safety distance, the calculation process can be simplified, and the processing efficiency is improved. The preset braking position can be set according to the actual braking position (such as the position of the supporting seat), the response time of the equipment, the buffer distance and the like.
Of course, the information of the support seat and the preset buffer distance (including the time required by the equipment to respond and the set buffer distance, etc.) may also be stored in the memory, and the processor of the computer equipment may directly call the preset braking position information and the car position information to calculate the safety distance.
On the basis of any one of the above embodiments, in an embodiment, the method for controlling the car to stop further includes the following steps:
calculating to obtain a second braking distance according to the running speed information of the car and the deceleration information of the electric safety gear, wherein the second braking distance is smaller than the first braking distance;
when the first braking distance is greater than the safety distance and the safety distance is greater than the second braking distance, sending a braking instruction of the electric safety tongs;
and when the safety distance is smaller than the second braking distance, sending a full braking instruction.
In this way, the second braking distance is calculated according to the running speed information of the car and the deceleration information of the electric safety gear, and the second braking distance is used for further safety control. If the safety distance is less than the second braking distance, a full braking command is sent, so that all devices capable of stopping the car act to brake, including but not limited to a speed limiter, an electric safety gear, a brake and other emergency braking devices.
Specifically, in one embodiment, the running distance required for braking the car at the current speed by the brake action, namely the first braking distance, is calculated according to the average deceleration of the car which can be provided by the brake. When calculating the first stopping distance, where vpFor the current speed value of the elevator, t0～t1The time is the sum t of the response time of the computer equipment and the brakea，t1～t2For the time t from the beginning of braking the car to the complete stop of the carb. Such as ta0.35s, the average deceleration a of the cage provided by the brake is 2m/s2If the current speed of the cage is 2m/S, the first braking distance S is set1Is S1＝vp*ta+vp 2The/2 a is 1.7m, and the 10% buffer amount in this example is 1.87 m. The computer device calculates the safe distance according to the output of the position detection device, cuts off the power supply of the brake when detecting that the safe distance is larger than the first braking distance of 1.87m, and the brake brakes the traction sheave to reduce the speed of the lift car and brake, thereby ensuring the lift carA safe stop is possible.
The second braking distance may be a running distance required for braking the car at the current speed by the electric safety tongs, which is calculated from an average car deceleration that can be provided by the electric safety tongs. When calculating the second stopping distance, where vpFor the current speed value of the elevator, t0～t1The time is the sum t of the response time of the computer equipment and the electrodynamic safety tongsa，t1～t2For the time t from the beginning of braking the car to the complete stop of the carb. Setting t in the systema0.5s, the average deceleration a of the cage provided by the electric safety gear is 8m/s2If the current speed of the cage is 2m/S, the second braking distance S is set2Is S2＝vp*ta+vp 2The/2 a is 1.25m, and the margin of 10% in this example is 1.37 m. And calculating to obtain a safety distance, and cutting off a power supply of the electric safety tongs when detecting that the safety distance is smaller than the first braking distance 1.87m and larger than the second braking distance 1.37m, powering off an opener of the safety tongs, clamping the guide rail by a tongs body, decelerating and braking the car, and ensuring that the car can be safely stopped.
It should be noted that the method for controlling the car stop in this embodiment can be applied to an elevator with a buffer, which is beneficial to further improving the safety of the elevator operation; the buffer can be applied to the elevator without the buffer, the running safety of the car can be ensured, and the installation cost and the operation cost of the elevator can be reduced compared with the prior art because the buffer is cancelled.
Equivalently, in one embodiment, the elevator has a buffer, which makes the car run more safely.
It should be understood that although the steps of fig. 2 to 5 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2 to 5 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the other steps or stages.
In one embodiment, a readable storage medium is also provided, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method of controlling car stopping as in any of the above embodiments.
The readable storage medium is further used for storing a program for realizing the steps of the method for controlling the stop of the car in any embodiment, and the program is applied to the elevator, so that the brake function of the brake and the braking function of the electric safety gear can be fully utilized, the car can be safely stopped, and the car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
As shown in fig. 6 or fig. 7, in an embodiment, there is further provided a computer device including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method for controlling the car stop according to any one of the above embodiments.
The computer equipment can be used for realizing the method for controlling the car to stop in any embodiment, and the method is applied to the elevator, can fully utilize the braking functions of the brake and the electric safety tongs, so that the car can be safely stopped, and the car can run more safely; and the buffer can be optionally cancelled under the condition of ensuring the safe operation of the lift car, a pit does not need to be dug deeply, and the installation cost and the operation cost of the elevator are favorably reduced.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second", "third", "fourth" 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," "second," "third," or "fourth" 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.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, when one element is considered as "transmission connection" another element, the two elements may be fixed in a detachable connection manner or in a non-detachable connection manner, as long as the force transmission can be realized, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be realized in the prior art, and is not burdensome.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to," "disposed on" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of controlling car stopping, comprising the steps of:
obtaining car running speed information and car position information;
calculating to obtain a first braking distance according to the running speed information of the car and the deceleration information of the brake;
calculating to obtain a safety distance according to the position information of the car;
when the first braking distance is smaller than the safety distance, a brake braking instruction is sent;
when the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety tongs;
before the brake command is sent or before the brake command of the electric safety gear is sent, the method further comprises the following steps:
acquiring car deceleration information;
if the car deceleration information conforms to a preset deceleration rule, not sending a brake command and not sending an electric safety gear brake command;
if the car deceleration information does not accord with a preset deceleration rule and the first braking distance is smaller than the safe distance, a brake command is sent;
or if the car deceleration information does not accord with a preset deceleration rule and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
2. The method of controlling car stopping according to claim 1, further comprising, before obtaining car deceleration information, the steps of:
after receiving a descending command of the car, the car reaches a first preset time or the car descends a first preset distance, and whether the car descends at a reduced speed is judged;
if the cage descends at a deceleration state, forming cage deceleration information;
if the car does not decelerate and the first braking distance is smaller than the safety distance, a brake braking instruction is sent;
or if the car does not decelerate and goes down and the first braking distance is greater than the safety distance, sending a braking instruction of the electric safety gear.
3. The method of controlling car stopping according to claim 1, further comprising the steps of, after sending a brake braking command:
after reaching a second preset time or descending a second preset distance, acquiring speed information of the car after stopping;
and if the speed information after the car is stopped does not accord with the brake stopping and decelerating rule, sending a braking instruction of the electric safety gear.
4. The method of controlling car stopping of claim 1, further comprising the steps of:
judging whether the steel wire rope is broken or not;
and if the steel wire rope is broken, sending a braking instruction of the electric safety gear.
5. The method of controlling car stopping of claim 1, wherein calculating the safe distance comprises the steps of:
calculating to obtain a safety distance according to the position information of the lift car and by combining with a preset braking position;
or according to the car position information, the safety distance is calculated by combining the support seat position information and the preset buffer distance.
6. The method of controlling car stopping according to any one of claims 1 to 5, further comprising the steps of:
calculating to obtain a second braking distance according to the running speed information of the car and the deceleration information of the electric safety gear, wherein the second braking distance is smaller than the first braking distance;
when the first braking distance is greater than the safety distance and the safety distance is greater than the second braking distance, sending a braking instruction of the electric safety tongs;
and when the safety distance is smaller than the second braking distance, sending a full braking instruction.
7. Method for controlling stopping of a car according to any of the claims 1 to 5, characterized in that the first stopping distance S1Is S1＝vp*ta+vp 2A/2 a; wherein v ispFor the current speed value of the elevator, taIs the sum of the response times of the computer device and the brake, tbThe time from the car starting to brake to the car stopping completely.
8. A readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of the method of controlling the stopping of a car according to any one of claims 1 to 7.
9. Computer arrangement comprising a memory and a processor, the memory storing a computer program, characterized in that the processor when executing performs the steps of the method of controlling stopping of a car according to any of claims 1 to 7.
10. An elevator, characterized by comprising a car, a speed detection device, a position detection device, a support base for supporting the car, an electric safety gear for clamping a guide rail, a brake for holding a traction sheave tightly, and a computer device, wherein the speed detection device is used for detecting the running speed of the car, the position detection device is used for detecting the position of the car in a hoistway, the electric safety gear and the brake are fixedly arranged on the car, the computer device is in communication connection with the speed detection device, the position detection device, the electric safety gear and the brake, the computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method for controlling the car to stop according to any one of claims 1 to 7 when executed.
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| CN202010235614.3A CN111532927B (en) | 2020-03-30 | 2020-03-30 | Elevator, computer device, readable storage medium and method for controlling car stop |
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| CN202010235614.3A CN111532927B (en) | 2020-03-30 | 2020-03-30 | Elevator, computer device, readable storage medium and method for controlling car stop |
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| CN113401759B (en) * | 2021-06-29 | 2023-06-23 | 日立楼宇技术（广州）有限公司 | Braking method and device for elevator car |
| CN113788381A (en) * | 2021-09-28 | 2021-12-14 | 苏州富士精工电梯有限公司 | Novel well home use elevator |
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