CN116262582A - Method and device for detecting traction force of elevator without machine room - Google Patents
Method and device for detecting traction force of elevator without machine room Download PDFInfo
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- CN116262582A CN116262582A CN202211399116.8A CN202211399116A CN116262582A CN 116262582 A CN116262582 A CN 116262582A CN 202211399116 A CN202211399116 A CN 202211399116A CN 116262582 A CN116262582 A CN 116262582A
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- 238000001514 detection method Methods 0.000 claims abstract description 50
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 238000005286 illumination Methods 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012345 traction test Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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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
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0065—Roping
- B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
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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
- B66B5/14—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of excessive loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
The invention discloses a method and a device for detecting traction force of a machine-room-less elevator, which solve the problems of low detection precision caused by deviation in the elevator traction capacity detection and test process in the prior art, and the detection method comprises the following steps: s1: detecting whether the elevator without machine room ascends when the counter weight is pressed on the buffer and the traction force is upward when the elevator without machine room is empty; s2: detecting the traction force of the elevator without machine room when the elevator without machine room is unloaded and ascends at a normal speed; s3: when the load of the elevator without the machine room is detected, the traction force of the elevator without the machine room is detected when the elevator runs at a normal speed; s4: and judging whether the traction force of the elevator without machine room is in a normal state according to the detection results of the S1, the S2 and the S3. No human intervention is needed, the equipment is few, the installation is simple, and the detection precision is high.
Description
Technical Field
The invention relates to the technical field of elevator traction force detection, in particular to a method and a device for detecting traction force of an elevator without a machine room.
Background
The elevator without machine room is an elevator which does not need a building to provide a closed special machine room for installing equipment such as an elevator driving host, a control cabinet, a speed limiter and the like. For traction type elevators, the magnitude of the traction force plays a very important role in ensuring safe and reliable operation of the elevator, if the traction force of an elevator traction system is low, the band-type brake can lose the function of stopping the car, and a steel wire rope can directly slip on a traction sheave to cause the car to run away. When the speed exceeds the rated speed, the safety tongs of the speed limiter act to make the parking carriage, and when the speed is lower than the rated speed, the elevator squats. When in light load, the elevator slides upwards, and because the execution units of the current PM (permanent magnet synchronous) host machine uplink overspeed are all host machine band-type brakes, the car cannot be stopped by the uplink overspeed, only the top can be punched, safety accidents are easy to cause, and great potential safety hazards are brought to elevator taking. Therefore, monitoring of traction force of a traction drive elevator is of paramount importance.
The invention patent of a detection method for the traction force of an elevator is disclosed in the year 2016, 3 and 30, the publication number of the patent is CN105438907A, the elevator with a set load operates in a specified direction under the triggering of a detection instruction, and when the operation speed of the elevator reaches the set speed, the elevator is braked urgently; after the elevator stops, controlling the elevator to run to a flat layer position; and calculating a distance difference between the absolute position of the elevator car and the actual position of the flat floor, judging that the traction force of the elevator is in a smaller state when the distance difference is larger than or equal to a first threshold value, judging that the traction force of the elevator is in a larger state when the distance difference is smaller than or equal to a second threshold value, and judging that the traction force of the elevator is in a normal state when the distance difference is smaller than the first threshold value and larger than the second threshold value. But suffer from the following disadvantages: in the detection method, the distance difference between the absolute position of the elevator car and the actual position of the flat floor is calculated, and the distance difference is influenced by the braking force of the elevator and has deviation; the requirement of the detection method for the leveling position is not limited to the floor nearest to the elevator stopping position, and the detection result is different due to the difference of the leveling position.
Disclosure of Invention
The invention aims to solve the problems of low detection precision caused by deviation in the elevator traction capacity detection and test process in the prior art, and provides a method and a device for detecting the traction force of an elevator without a machine room, which do not need human intervention, and have the advantages of less equipment, simple installation and high detection precision.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the method for detecting the traction force of the elevator without the machine room comprises the following steps:
s1: detecting whether the elevator without machine room ascends when the counter weight is pressed on the buffer and the traction force is upward when the elevator without machine room is empty;
s2: detecting the traction force of the elevator without machine room when the elevator without machine room is unloaded and ascends at a normal speed;
s3: when the load of the elevator without the machine room is detected, the traction force of the elevator without the machine room is detected when the elevator runs at a normal speed;
s4: and judging whether the traction force of the elevator without machine room is in a normal state according to the detection results of the S1, the S2 and the S3.
The drag force when the traction machine rotates in the upward direction of the elevator while being pressed against the buffer is detected first, in which case the drag force should not lift the empty car and the car will not go upward. An upward braking test is then performed, i.e. when the car is idling and is traveling at normal operating speed, the motor and brake are cut off, and during the braking time the car should be completely stopped without significant deformation and damage. And finally, carrying out a downlink braking test, namely, loading 1.25 times of rated load capacity on the lift car, and downlink to the lower part of the stroke at the normal running speed, cutting off the power supply of the motor and the brake, wherein the traction machine should stop running in the braking time, and the lift car should be completely stopped without obvious deformation and damage. Through no-load traction test, whether the traction force is too large to lift the no-load car is checked, and through load traction test, whether the traction force is insufficient in design to cause the sliding ladder is checked, so that the traction force can be effectively detected, manual detection is not needed, and the detection precision is high.
Preferably, the step S1.1 is further expressed as:
s1.1: shorting an upper limit switch, a limit switch and a buffer plunger reset switch of the elevator without the machine room;
s1.2: lifting the empty load car at the maintenance speed, and continuously enabling the traction machine to rotate in the uplink direction after the counterweight is pressed on the buffer;
s1.3: judging whether the traction machine stops rotating and whether the traction wheel and the traction rope slide relatively.
When the counterweight is pressed against the buffer, the traction machine should stop rotating during the buffer time, and the traction force can not lift the car any more, otherwise, the traction force may be in an abnormal state.
Preferably, in the step S1.3, the specific step of determining whether the traction sheave and the traction rope slide relatively or the traction machine stops rotating is as follows:
s1.3.1: marking the traction rope and the traction sheave;
s1.3.2: collecting image data of the joint of the traction sheave and the traction rope according to frequency and collecting the image data of the traction sheave;
s1.3.3: comparing the acquired image data, and calculating the time for stopping rotation of the traction sheave and the relative sliding distance between the traction sheave and the traction rope;
s1.3.4: judging whether the time for stopping rotation of the traction sheave meets a preset first time threshold value or not and whether the relative sliding distance between the traction sheave and the traction rope meets a preset distance threshold value or not;
s1.3.5: if the time for stopping rotation of the traction sheave satisfies the first time threshold and the relative sliding distance between the traction sheave and the traction rope satisfies the distance threshold, it is indicated that the traction sheave is in a normal state in the case of S1.
Whether the traction sheave is in a normal state or not is judged through an image acquisition technology, and the traction sheave and the traction rope are marked, so that whether relative sliding occurs between the traction sheave and the traction rope or not is judged conveniently, the mark is obvious, the identification is convenient, and the detection precision is improved.
Preferably, the step S2 is further expressed as:
s2.1: the elevator without machine room is unloaded, and ascends at a normal running speed under the triggering of a detection instruction, and when the running speed of the elevator reaches a set speed, the elevator is braked urgently;
s2.2: judging whether the car is completely stopped or not, and detecting whether the car is obviously deformed and damaged or not.
When the car is unloaded and is ascending at normal running speed, the motor and the brake are cut off, and the car should be completely stopped during the braking time without obvious deformation and damage.
Preferably, said step S2.2 is further expressed as:
s2.2.1: when the elevator without the machine room is in emergency braking, collecting the speed of the elevator without the machine room, collecting the time for stopping the elevator without the machine room, and judging whether the time meets a preset second time threshold value or not;
s2.2.2: acquiring image data of each surface of the car, comparing the image data with pre-stored car image data, and judging whether the car is obviously deformed or damaged;
s2.2.3: if the time taken for stopping the elevator without machine room meets the second time threshold and the car is not obviously deformed or damaged, the condition of S2 is indicated that the traction force is in a normal state.
Whether the elevator is stopped or not is judged according to the speed of the elevator without the machine room, and whether the elevator car is obviously deformed or damaged is judged according to the acquired elevator car image data, so that whether the elevator traction sheave is in a long state or not is judged.
Preferably, the step S3 is further expressed as:
s3.1: the elevator without machine room is loaded with 1.25 times of rated load capacity, descends at normal running speed under the triggering of a detection instruction, and when the running speed of the elevator reaches a set speed, the elevator is braked urgently;
s3.2: judging whether the traction machine stops running or not, judging whether the lift car stops completely or not, and ensuring that the lift car has no obvious deformation and damage;
s3.3: if the traction machine stops running, the car is completely stopped, and the car is not obviously deformed or damaged, the traction force is in a normal state when the traction machine runs at a normal speed during load.
The car is loaded with 1.25 times of rated load capacity, descends to the lower part of the stroke at normal running speed, cuts off the power supply of the motor and the brake, stops running of the traction machine in braking time, and completely stops without obvious deformation and damage.
Preferably, the step S4 includes:
a: if the conditions of S1, S2 and S3 are detected to be in a normal state, the situation that the traction force of the elevator without the machine room is in a normal state is indicated;
b: if the traction force is in an abnormal state under the conditions of S1, S2 and S3, returning to the S1 for re-detection, and if the detection result is consistent with the last detection result, indicating that the traction force of the elevator without machine room is in an abnormal state;
c: if two or more conditions exist in which the traction force is in an abnormal state in the cases of S1, S2 and S3, it is indicated that the traction force of the elevator without machine room is in an abnormal state.
If there is an abnormal condition of traction, indicating that there may be a detection error, re-detection is required. Thereby, the accuracy of detection can be improved.
A device for detecting drag force of a machine-room-less elevator, comprising:
the control module is used for controlling the acquisition frequency of the image acquisition module and the normal operation of each module;
the image acquisition module is used for acquiring image data of the joint of the traction sheave and the traction wire rope, image data of the traction sheave and image data of the lift car according to the frequency set by the control module;
the illumination module is used for providing illumination for the image acquisition module;
the data processing module is used for detecting whether the traction sheave and the traction steel wire rope slide relatively, whether the traction sheave rotates and whether the elevator car deforms according to the image data acquired by the image acquisition module;
and the judging module is used for judging whether the traction force of the elevator without the machine room is in a normal state according to the detection result of the data processing module.
The control module is respectively connected with the image acquisition module and the illumination module, the image acquisition module is connected with the data processing module, and the data processing module is connected with the judging module. Through the synergistic effect of each module, whether the traction force of the elevator without the machine room is in a normal state can be judged, so that the normal operation of the elevator without the machine room is ensured, and the safety is improved.
Preferably, the image acquisition module comprises a charging camera with adjustable direction, and the camera is installed on the top of a car or a hoistway channel steel of the elevator without the machine room. The camera is preferably a charging type camera with a magnet chassis convenient and adjustable in direction, is convenient to install and detach, is installed on the top of a lift car or a hoistway channel steel of a machine room-less lift, is convenient to observe a traction sheave and a traction steel wire rope, and obtains clear images.
Preferably, the lighting module includes:
the hoistway lighting devices are uniformly and intermittently arranged in the hoistway and are used for increasing the definition of image data acquired by the image acquisition module;
and the magnetic lighting device is installed on the channel steel at the top of the well or on the elevator car roof without a machine room, is started when the well lighting device fails and is used for increasing the definition of the image data acquired by the image acquisition module.
The illumination is provided for the image acquisition module, so that the definition of the acquired image data is improved, and the detection precision is improved. The magnetic lighting device can be a magnetic flashlight.
Therefore, the invention has the following beneficial effects: 1. through the no-load traction test, whether the traction force lifts the no-load car too much is checked, and through the load traction test, whether the traction force is insufficiently designed to lead to the sliding ladder is checked, so that the traction force can be effectively detected; 2. the traction force of the elevator can be detected at any time according to the requirement, so that the elevator is convenient and quick; 3. the traction force is directly detected by utilizing the image recognition technology, unnecessary equipment is not needed, the installation is simple, and the detection precision is high.
Drawings
FIG. 1 is a flow chart illustrating the operation of the method of the present invention.
Fig. 2 is a schematic diagram of a system structure of the device in the present invention.
In the figure: 1. a control module; 2. an image acquisition module; 3. a lighting module; 4. a data processing module; 5. and a judging module.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
in the embodiment shown in fig. 1, a method for detecting the traction force of an elevator without machine room can be seen, and the operation flow is as follows: step one, detecting whether the elevator without machine room ascends when the counter weight is pressed on a buffer and the traction force is upward when the elevator without machine room is empty; step two, detecting the traction force of the elevator without machine room when the elevator without machine room is unloaded and ascends at a normal speed; step three, when the load of the elevator without the machine room is detected, the traction force of the elevator without the machine room is detected when the elevator runs at a normal speed; and step four, judging whether the traction force of the elevator without the machine room is in a normal state or not according to the detection results of the step one, the step two and the step three.
The drag force when the traction machine rotates in the upward direction of the elevator while being pressed against the buffer is detected first, in which case the drag force should not lift the empty car and the car will not go upward. An upward braking test is then performed, i.e. when the car is idling and is traveling at normal operating speed, the motor and brake are cut off, and during the braking time the car should be completely stopped without significant deformation and damage. And finally, carrying out a downlink braking test, namely, loading 1.25 times of rated load capacity on the lift car, and downlink to the lower part of the stroke at the normal running speed, cutting off the power supply of the motor and the brake, wherein the traction machine should stop running in the braking time, and the lift car should be completely stopped without obvious deformation and damage. Through no-load traction test, whether the traction force is too large to lift the no-load car is checked, and through load traction test, whether the traction force is insufficient in design to cause the sliding ladder is checked, so that the traction force can be effectively detected, manual detection is not needed, and the detection precision is high.
The technical solution of the present application is further described below by means of a specific example, as shown in fig. 2:
the first step: when the elevator without machine room is detected to be empty, the elevator without machine room rises when the counterweight is pressed on the buffer and the traction force is upward.
Shorting an upper limit switch, a limit switch and a buffer plunger reset switch of the elevator without the machine room; lifting the empty load car at the maintenance speed, and continuously enabling the traction machine to rotate in the uplink direction after the counterweight is pressed on the buffer; judging whether the traction machine stops rotating and whether the traction wheel and the traction rope slide relatively.
Wherein, the specific step of judging whether the traction sheave and the traction rope have relative sliding phenomenon or the traction machine stops rotating is: obvious marks are carried out on the traction ropes and the traction sheaves; collecting image data of the joint of the traction sheave and the traction rope according to frequency and collecting the image data of the traction sheave; comparing the acquired image data, and calculating the time for stopping rotation of the traction sheave and the relative sliding distance between the traction sheave and the traction rope; judging whether the time for stopping rotation of the traction sheave meets a preset first time threshold value or not and whether the relative sliding distance between the traction sheave and the traction rope meets a preset distance threshold value or not; if the time for stopping rotation of the traction sheave satisfies the first time threshold and the relative sliding distance between the traction sheave and the traction rope satisfies the distance threshold, it is indicated that the traction force is in a normal state in the case of the first step. And whether the traction force is in a normal state is judged by using an image recognition technology, manual operation is not needed, and recognition is more accurate. When the traction force is identified to be in an abnormal state, an alarm is sent out to remind a worker, and when no load of the elevator without machine room is detected, the traction force is pressed on the buffer in a weight-against mode, and when the traction force is upward, the traction force is in the abnormal state.
And a second step of: and detecting the traction force of the elevator without machine room when the elevator without machine room is unloaded and ascends at a normal speed.
The elevator without machine room is unloaded, and ascends at a normal running speed under the triggering of a detection instruction, and when the running speed of the elevator reaches a set speed, the elevator without machine room is braked urgently; judging whether the car is completely stopped or not, and detecting whether the car is obviously deformed and damaged or not.
When the elevator without the machine room is in emergency braking, collecting the speed of the elevator without the machine room, collecting the time for stopping the elevator without the machine room, and judging whether the time meets a preset second time threshold value or not; acquiring image data of each surface of the car, comparing the image data with pre-stored car image data, and judging whether the car is obviously deformed or damaged; if the time taken by the elevator without machine room to stop meets the second time threshold and the car is not obviously deformed or damaged, the traction force is in a normal state when the elevator is in an idle state and is in an upward state at a normal speed.
And a third step of: when the load of the elevator without machine room is detected, the traction force of the elevator without machine room is detected when the elevator runs at a normal speed.
The elevator without machine room is loaded with 1.25 times of rated load capacity, descends to the lower part of the stroke at the normal running speed under the triggering of the detection instruction, and cuts off the power supply of the motor and the brake when the running speed of the elevator reaches the set speed, so that the elevator is braked urgently; judging whether the traction machine stops running or not, and whether the lift car stops completely or not, wherein the lift car is free from obvious deformation and damage. During braking time, if the traction force is in a normal state, the traction machine should stop running, the car should be completely stopped, and there is no obvious deformation and damage.
Fourth step: and judging whether the traction force of the elevator without the machine room is in a normal state according to the detection results of the first step, the second step and the third step.
If the first step, the second step and the third step all detect that the traction force is in a normal state, the traction force of the elevator without the machine room is in a normal state; if the traction force is in an abnormal state in the first step, the second step and the third step, returning to the first step for re-detection, and if the detection result is consistent with the last detection result, indicating that the traction force of the elevator without machine room is in an abnormal state; if the traction force is in an abnormal state in two or more conditions in the first step, the second step and the third step, the traction force of the elevator without machine room is indicated to be in an abnormal state. If there is an abnormal condition of traction, indicating that there may be a detection error, re-detection is required. Thereby, the accuracy of detection can be improved.
The embodiment also provides a device for detecting the traction force of the elevator without machine room, as shown in fig. 2, including:
a control module 1 for controlling the acquisition frequency of the image acquisition module and the normal operation of each module; the image acquisition module 2 is used for acquiring image data of the joint of the traction sheave and the traction wire rope, image data of the traction sheave and image data of the lift car according to the frequency set by the control module; an illumination module 3 for providing illumination for the image acquisition module; the data processing module 4 is used for detecting whether the traction sheave and the traction wire rope slide relatively, whether the traction sheave rotates and whether the elevator car deforms according to the image data acquired by the image acquisition module; the judging module 5 is used for judging whether the traction force of the elevator without the machine room is in a normal state according to the detection result of the data processing module; the control module is respectively connected with the image acquisition module and the illumination module, the image acquisition module is connected with the data processing module, and the data processing module is connected with the judging module. Through the synergistic effect of each module, whether the traction force of the elevator without the machine room is in a normal state can be judged, so that the normal operation of the elevator without the machine room is ensured, and the safety is improved.
Specific:
the image acquisition module comprises a magnet chassis, a charging camera with the direction adjustable, and the camera is fixedly arranged on the car top or the hoistway channel steel of the elevator without the machine room, so that the positions of the traction sheave and the traction wire rope are convenient to observe, and image data of the joints of the traction sheave and the traction rope and image data of the traction sheave are acquired.
The image acquisition module further comprises a charging type camera which is arranged at the bottom of the well and uniformly detects the direction of each surface of the well, and is used for acquiring the image data of each surface of the car.
The illumination module comprises a hoistway illumination device, and the hoistway illumination device comprises a plurality of illumination lamps which are uniformly and intermittently arranged in a hoistway and used for increasing the definition of image data acquired by the image acquisition module.
The lighting module is also provided with a magnetic suction lighting device, the magnetic suction lighting device comprises a magnetic suction flashlight for installing channel steel at the top of a hoistway or the elevator car roof without a machine room, and the magnetic suction lighting device can be started when the hoistway lighting device fails and is used for increasing the definition of image data acquired by the image acquisition module.
The embodiment also comprises a speed sensor which is arranged on the elevator car without the machine room and used for detecting the speed of the car, and the speed sensor is connected with the judging module.
The embodiment also comprises an alarm device which alarms when the judgment module judges that the traction force is in an abnormal state, and reminds workers.
The invention has the advantages of simple equipment, low cost and easy installation.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (10)
1. The method for detecting the traction force of the elevator without the machine room is characterized by comprising the following steps of:
s1: detecting whether the elevator without machine room ascends when the counter weight is pressed on the buffer and the traction force is upward when the elevator without machine room is empty;
s2: detecting the traction force of the elevator without machine room when the elevator without machine room is unloaded and ascends at a normal speed;
s3: when the load of the elevator without the machine room is detected, the traction force of the elevator without the machine room is detected when the elevator runs at a normal speed;
s4: and judging whether the traction force of the elevator without machine room is in a normal state according to the detection results of the S1, the S2 and the S3.
2. The method for detecting the traction force of a machineroom-less elevator according to claim 1, wherein the step S1.1 is further expressed as:
s1.1: shorting an upper limit switch, a limit switch and a buffer plunger reset switch of the elevator without the machine room;
s1.2: lifting the empty load car at the maintenance speed, and continuously enabling the traction machine to rotate in the uplink direction after the counterweight is pressed on the buffer;
s1.3: judging whether the traction machine stops rotating and whether the traction wheel and the traction rope slide relatively.
3. The method for detecting the traction force of the elevator without machine room according to claim 2, wherein in the step S1.3, the specific step of judging whether the traction sheave and the traction rope slide relatively or the traction machine stops rotating is as follows:
s1.3.1: marking the traction rope and the traction sheave;
s1.3.2: collecting image data of the joint of the traction sheave and the traction rope according to frequency and collecting the image data of the traction sheave;
s1.3.3: comparing the acquired image data, and calculating the time for stopping rotation of the traction sheave and the relative sliding distance between the traction sheave and the traction rope;
s1.3.4: judging whether the time for stopping rotation of the traction sheave meets a preset first time threshold value or not and whether the relative sliding distance between the traction sheave and the traction rope meets a preset distance threshold value or not;
s1.3.5: if the time for stopping rotation of the traction sheave meets the first time threshold and the relative sliding distance between the traction sheave and the traction rope meets the distance threshold, the traction sheave is in a normal state when the counterweight is pressed on the buffer and the traction force is upward when no load is indicated.
4. A method for detecting the drag force of a machine-roomless elevator as claimed in claim 2 or 3, wherein said step S2 is further expressed as:
s2.1: the elevator without machine room is unloaded, and ascends at a normal running speed under the triggering of a detection instruction, and when the running speed of the elevator reaches a set speed, the elevator without machine room is braked urgently;
s2.2: judging whether the car is completely stopped or not, and detecting whether the car is obviously deformed and damaged or not.
5. The method for detecting the traction force of a machineroom-less elevator according to claim 1, wherein the step S2.2 is further expressed as:
s2.2.1: when the elevator without the machine room is in emergency braking, collecting the speed of the elevator without the machine room, collecting the time for stopping the elevator without the machine room, and judging whether the time meets a preset second time threshold value or not;
s2.2.2: acquiring image data of each surface of the car, comparing the image data with pre-stored car image data, and judging whether the car is obviously deformed or damaged;
s2.2.3: if the time taken by the elevator without machine room to stop meets the second time threshold and the car is not obviously deformed or damaged, the traction force is in a normal state when the elevator is in an idle state and is in an upward state at a normal speed.
6. The method for detecting the traction force of a machineroom-less elevator according to claim 1, wherein the step S3 is further expressed as:
s3.1: the elevator without machine room is loaded with 1.25 times of rated load capacity, descends at normal running speed under the triggering of a detection instruction, and when the running speed of the elevator reaches a set speed, the elevator is braked urgently;
s3.2: judging whether the traction machine stops running or not, and whether the lift car stops completely or not, wherein the lift car is free from obvious deformation and damage;
s3.3: if the traction machine stops running, the car is completely stopped, and the car is not obviously deformed or damaged, the traction force is in a normal state when the traction machine runs at a normal speed during load.
7. The method for detecting the traction force of the elevator without machine room according to claim 1, wherein the step S4 comprises:
a: if the conditions of S1, S2 and S3 are detected to be in a normal state, the situation that the traction force of the elevator without the machine room is in a normal state is indicated;
b: if the conditions of S1, S2 and S3 exist that the traction force is in an abnormal state, returning to the condition of S1 for re-detection, and if the detection result is consistent with the last detection result, indicating that the traction force of the elevator without machine room is in an abnormal state;
c: if two or more conditions exist in which the traction force is in an abnormal state in the cases of S1, S2 and S3, it is indicated that the traction force of the elevator without machine room is in an abnormal state.
8. A device for detecting traction force of a machine-roomless elevator, which is applied to the method for detecting traction force of a machine-roomless elevator as claimed in any one of claims 1 to 7, and is characterized by comprising:
the control module is used for controlling the acquisition frequency of the image acquisition module and the normal operation of each module;
the image acquisition module is used for acquiring image data of the joint of the traction sheave and the traction wire rope, image data of the traction sheave and image data of the lift car according to the frequency set by the control module;
the illumination module is used for providing illumination for the image acquisition module;
the data processing module is used for detecting whether the traction sheave and the traction steel wire rope slide relatively, whether the traction sheave rotates and whether the elevator car deforms according to the image data acquired by the image acquisition module;
and the judging module is used for judging whether the traction force of the elevator without the machine room is in a normal state according to the detection result of the data processing module.
9. The machine room-less elevator traction force detection device of claim 8, wherein the image acquisition module comprises an adjustable direction charging camera mounted on a roof or hoistway channel of the machine room-less elevator.
10. The apparatus for detecting the drag force of a machineroom-less elevator according to claim 8 or 9, wherein the illumination module comprises:
the hoistway lighting devices are uniformly and intermittently arranged in the hoistway and are used for increasing the definition of image data acquired by the image acquisition module;
and the magnetic lighting device is installed on the channel steel at the top of the well or on the elevator car roof without a machine room, is started when the well lighting device fails and is used for increasing the definition of the image data acquired by the image acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211399116.8A CN116262582A (en) | 2022-11-09 | 2022-11-09 | Method and device for detecting traction force of elevator without machine room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211399116.8A CN116262582A (en) | 2022-11-09 | 2022-11-09 | Method and device for detecting traction force of elevator without machine room |
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| Publication Number | Publication Date |
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| CN116262582A true CN116262582A (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211399116.8A Pending CN116262582A (en) | 2022-11-09 | 2022-11-09 | Method and device for detecting traction force of elevator without machine room |
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| Country | Link |
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| CN (1) | CN116262582A (en) |
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