CN106672723B - Elevator brake method for detecting operation state and system - Google Patents

Abstract

The invention relates to a method for detecting the running state of an elevator brake, comprising the following steps: when a micro switch fails, controlling the elevator to enter an emergency electric running state; detecting the load of the car; Detect; when the braking torque is greater than the first preset value, control the brake to enter the brake release state; control the elevator to enter the low-speed running state under the brake release state; detect the actual running speed of the elevator under the low-speed running state; according to the actual The running speed and the preset speed calculate the running speed deviation of the elevator; when the running speed deviation is within the first preset range, it is determined that the brake is in a normal running state. The invention can detect the normal operation of the elevator brake when the micro switch fails. The invention also relates to an elevator brake operating state detection system capable of detecting the normal operation of the elevator brake when the micro switch fails.

Description

Elevator brake operating state detection method and system

technical field

The invention relates to the technical field of elevator safety, in particular to a method and system for detecting the running state of an elevator brake.

Background technique

Traditional elevators have machine rooms, where the machine rooms are usually used to place equipment such as hosts and control cabinets. However, with the advancement of technology and the increase of construction costs, at this stage, more and more people are gradually adopting machine room-less elevators by building the host, control cabinet and traction machine and other equipment in the original machine room into the hoistway. It replaces the machine room elevator to save space outside the hoistway and reduce construction costs.

The brake is one of the main safety components of the elevator without a machine room. It can stop the motor of the elevator when there is no power supply or under abnormal conditions, and make the car stop effectively. Therefore, the normal operation of the brake is closely related to the safe operation of the elevator. It is closely related, and in view of this, a micro switch for detecting the operation of the brake is usually set to ensure that the brake can operate normally before the elevator car runs.

Since the brake and the micro switch of the elevator without machine room are located in the well, it is not convenient for maintenance personnel to enter. Therefore, when the micro switch fails, the normal operation of the brake cannot be detected.

Contents of the invention

Based on this, it is necessary to address the above problems and provide a method for detecting the operating state of the elevator brake, which can detect the normal operation of the elevator brake when the micro switch fails.

A method for detecting the operating state of an elevator brake, comprising the following steps:

When the micro switch fails, the elevator is controlled to enter the emergency electric running state;

Detecting the load of the car under the emergency electric running state;

When the car is empty, the braking torque of the brake is detected;

When the braking torque is greater than the first preset value, control the brake to enter the brake release state; control the elevator to enter the low-speed operation state in the brake release state; control the elevator in the low-speed operation state The actual running speed is detected; wherein, the first preset value refers to the braking torque when the brake stops the car;

Calculate the running speed deviation of the elevator according to the actual running speed and the preset speed; when the running speed deviation is in the first preset range, it is determined that the brake is in a normal running state; wherein, the preset speed refers to the The control speed of the elevator in the low-speed running state.

The above method for detecting the running state of the elevator brake controls the elevator to enter the emergency electric running state and detects the load of the car in the emergency electric running state when the micro switch fails, so as to ensure that the car is The car is no-load, thereby improving the safety of detection; after determining that the car is no-load, the detection of the braking torque of the brake can be used to judge whether the brake can effectively stop the car; when it is determined that the brake can effectively stop the car When the car is running, that is, when the braking torque is greater than the first preset value, by controlling the brake to enter the brake release state, and after controlling the elevator to enter the low-speed running state in the brake release state, it can pass the detection The actual running speed of the elevator in the low-speed running state, and calculate the running speed deviation of the elevator according to the actual running speed and the preset speed to confirm whether the brake can be opened normally. When the running speed deviation is in the first preset range , to confirm that the brake can be normally opened, so that through the above steps, it can be confirmed that the brake can work normally in both the brake-on state and the brake-release state, so that it can be determined that the brake is in a normal operating state.

In addition, it also provides an elevator brake operating state detection system that can detect the normal operation of the elevator brake when the micro switch fails, including:

The control module is used to control the elevator to enter the emergency electric running state when the micro switch fails;

The car load detection module is used to detect the car load in the emergency electric running state;

The braking torque detection module is used to detect the braking torque of the brake when the car is empty;

A running speed detection module, configured to control the brake to enter the brake release state when the braking torque is greater than a first preset value; wherein, the first preset value refers to when the brake stops the car braking torque; control the elevator to enter a low-speed running state under the brake release state; detect the actual running speed of the elevator under the low-speed running state;

The running state judging module is used to calculate the running speed deviation of the elevator according to the actual running speed and the preset speed; when the running speed deviation is in the first preset range, it is judged that the brake is in a normal running state; wherein, the The preset speed refers to the control speed of the elevator in the low-speed running state.

Description of drawings

Fig. 1 is the flow chart of the elevator brake running state detection method in one embodiment;

Fig. 2 is the flow chart of the method for detecting the operating state of the elevator brake in another embodiment;

Fig. 3 is a schematic structural diagram of an elevator brake operating state detection system in one embodiment.

Detailed ways

In order to further explain the technical means adopted by the present invention and the effects obtained, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

Fig. 1 is an embodiment of a method for detecting the operating state of an elevator brake, comprising the following steps:

Step S100, when the micro switch fails, control the elevator to enter the emergency electric running state.

The control of the elevator into the emergency electric running state can be realized by operating the emergency electric running switch in the emergency and test operating device.

Step S200, detecting the load of the car in the emergency electric running state.

In one embodiment, as shown in FIG. 2 , when the elevator is in an emergency electric running state, the car load can be detected by acquiring a detection operation request instruction and according to the detection operation request instruction. The detection operation request command is used to request the elevator to enter the detection operation mode. The car load is used to determine whether there are passengers in the car. When there are passengers in the car, the passengers need to be transferred first to ensure that the car is empty and improve the safety of detection. Therefore, after obtaining the detection operation request command, whether the elevator can enter the detection operation mode needs to be judged in conjunction with the car load.

Step S300, when the car is empty, detect the braking torque of the brake.

In one embodiment, when the car is empty, it can be determined that there is no passenger in the car, and at this time, the elevator can be controlled to enter a detection operation mode. Wherein, the detection operation mode refers to the mode of giving the motor a first preset rotational torque and detecting whether the motor rotates under the state of the brake. When the elevator is in the detection operation mode, a detection start instruction can be obtained, and after the instruction is obtained, the braking torque of the brake is detected. Wherein, the detection start instruction may be a trigger instruction.

Further, in one embodiment, the step of detecting the braking torque of the brake is used to confirm the braking torque of the brake when the brake is in a brake state. Specifically, the brake can be controlled to enter the brake state, and when the brake is in the brake state, a start command can be sent to the motor of the elevator. Whether the dynamic torque can effectively stop the elevator.

Step S400, when the braking torque is greater than a first preset value, control the brake to enter the brake release state; control the elevator to enter the low speed running state in the brake release state; control the elevator to enter the low speed running state in the low speed running state The actual running speed of the elevator is detected; wherein, the first preset value refers to the braking torque when the brake stops the car.

In one embodiment, if the motor does not rotate, it can be considered that the braking torque of the brake is greater than the first set value, that is, it can be considered that the braking torque of the brake can effectively stop the car, so that it can be confirmed that the brake can normal work. Afterwards, the normal opening of the brake can be confirmed by controlling the brake to enter the brake release state. Specifically, it is possible to control the brake to enter the brake release state, control the elevator to enter the low speed running state in the brake release state, and detect the actual running speed of the elevator when the elevator is in the low speed running state.

In another embodiment, as shown in Figure 2, when the braking torque is less than the first preset value, it can be considered that the braking torque of the brake cannot effectively stop the car, and the The elevator exits the detection operation mode, and ends the detection of the operation state of the elevator brake.

Step S500, calculating the running speed deviation of the elevator according to the actual running speed and the preset speed; when the running speed deviation is within the first preset range, it is determined that the brake is in a normal running state; wherein, the preset speed refers to the control speed of the elevator in the low-speed running state. The first preset range can indicate the deviation between the actual running speed and the preset speed. In order to improve the accuracy, the first preset range can be set to The preset range is set to 5%, but other values are also possible.

In one embodiment, when the operating speed deviation is within the first preset range, it can be confirmed that the brake can work normally in the brake release state. In this way, through the above steps, it can be confirmed that the brake is in the brake lock state and the brake release state. All can work normally, so it can be judged that the brake is in a normal operating state.

In one embodiment, as shown in FIG. 2 , when the running speed deviation is not within the first preset range, the elevator is controlled to exit the detection running mode, and the detection of the running state of the brake of the elevator is ended.

After it is determined that the brake can operate normally, further, in one embodiment, the fault of the micro switch can also be checked. Specifically, the elevator may be controlled to enter the inspection operation state by acquiring the inspection operation request signal and controlling the elevator according to the inspection operation request signal. Among them, the elevator runs at the inspection speed in the inspection running state, which can facilitate the maintenance personnel to reach the position of the main machine through the car top, and inspect the micro switch to troubleshoot.

As shown in Figure 3, a kind of elevator brake operating state detection system comprises:

The control module 100 is used to control the elevator to enter the emergency electric running state when the micro switch fails;

The car load detection module 200 is used to detect the car load in the emergency electric running state;

The braking torque detection module 300 is used to detect the braking torque of the brake when the car is empty;

The running speed detection module 400 is configured to control the brake to enter the brake release state when the braking torque is greater than a first preset value; wherein, the first preset value means that the brake stops the car braking torque at the time; control the elevator to enter the low-speed running state under the brake release state; detect the actual running speed of the elevator under the low-speed running state;

The running state determination module 500 is used to calculate the running speed deviation of the elevator according to the actual running speed and the preset speed; when the running speed deviation is within the first preset range, it is determined that the brake is in a normal running state; wherein, The preset speed refers to the control speed of the elevator in the low-speed running state.

In one embodiment, the car load detection module 200 can be used to detect the car load by acquiring a detection operation request instruction and according to the detection operation request instruction when the elevator is in an emergency electric running state. Wherein, the detection operation request instruction is used to request the elevator to enter the detection operation mode. The car load is used to determine whether there are passengers in the car. When there are passengers in the car, the passengers need to be transferred first to ensure that the car is empty and improve the safety of detection. Therefore, after the car load detection module 200 obtains the detection operation request instruction, it needs to combine the car load information when judging whether the elevator can enter the detection operation mode.

In one embodiment, when the car is empty, the braking torque detection module 300 can be used to control the elevator to enter the detection operation mode, and obtain the detection start instruction; after obtaining the detection start instruction, the braking torque of the brake to test. Wherein, the detection start instruction may be a trigger instruction.

Further, in one embodiment, the braking torque detection module 300 can also be used to confirm the braking torque of the brake when the brake is in a brake state. Specifically, the braking torque detection module 300 can control the brake to enter the brake state, and send a start command to the motor of the elevator when the brake is in the brake state. The start command is used to give the motor a torque, and then it can Rotate to check whether the braking torque of the brake can effectively stop the elevator.

In one embodiment, the running speed detection module 400 can be used to control the brake to enter the brake release state when the braking torque is greater than the first preset value, and control the elevator to enter the low speed running state in the brake release state, And when the elevator is running at a low speed, the actual running speed of the elevator is detected.

In another embodiment, the running speed detection module 400 can also be used to control the elevator to exit the detection running mode and end the detection of the running state of the elevator brake when the braking torque is less than the first preset value.

In one embodiment, the running state judging module 500 may be used to control the elevator to exit the detection running mode and end the detection of the running state of the elevator brake when the running speed deviation is not within the first preset range.

After it is determined that the brake can operate normally, further, in one embodiment, the running state determination module 500 can also be used to acquire an inspection operation request signal, and control the elevator to enter an inspection operation state according to the inspection operation request signal. Among them, the elevator runs at the inspection speed in the inspection running state, which can facilitate the maintenance personnel to reach the position of the main machine through the car top, and inspect the micro switch to troubleshoot.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of elevator brake method for detecting operation state, which comprises the following steps:

When microswitch failure, control elevator enters urgent motor-operated running state；

Car load is detected under the urgent motor-operated running state；

When the carriage zero load, the braking moment of brake is detected；

When the braking moment is greater than the first preset value, controls the brake and enter the state that declutches；In the state that declutches The lower control elevator enters low-speed run state；Under the low-speed run state to the actual motion speed of the elevator into Row detection；Wherein, first preset value refers to the braking moment when brake makes carriage stop；

The speed of service deviation of elevator is calculated according to the actual motion speed and pre-set velocity；When the speed of service deviation exists When the first preset range, determine that the brake is in normal operating condition；Wherein, the pre-set velocity refers to that the elevator exists Control speed under the low-speed run state.

2. elevator brake method for detecting operation state according to claim 1, which is characterized in that described described urgent The step of detecting under motor-operated running state to car load include:

Detection operation request instruction is obtained, request instruction is run according to the detection, the car load is detected.

3. elevator brake method for detecting operation state according to claim 2, which is characterized in that described to work as the carriage When unloaded, the step of detecting to the braking moment of brake, includes:

When the carriage zero load, controls the elevator and enter detection operational mode；Wherein, the detection operational mode refers to Under brake state, the rotating torque of the first preset value of motor is given, and detects whether motor rotates；

After obtaining detection sign under the detection operational mode, the braking moment of brake is detected.

4. elevator brake method for detecting operation state according to claim 3, which is characterized in that described to brake The step of braking moment is detected include:

It controls the brake and enters band-type brake state；

Enabled instruction is sent to the motor of elevator；

It is detected according to braking moment of the rotary state of the motor to brake.

5. elevator brake method for detecting operation state according to claim 3, which is characterized in that described to brake Braking moment the step of being detected after, further includes:

When the braking moment is less than first preset value, controls the elevator and exit the detection operational mode.

6. elevator brake method for detecting operation state according to claim 1, which is characterized in that described according to After the step of actual motion speed and pre-set velocity calculate the speed of service deviation of elevator, further includes:

When the speed of service deviation is not in first preset range, controls the elevator and exit the detection operation mould Formula.

7. elevator brake method for detecting operation state according to claim 1, which is characterized in that described in the judgement Brake was in after the step of normal operating condition, further includes:

Obtain inspection travel request signal；

The elevator, which is controlled, according to the inspection travel request signal enters inspection travel state.

8. a kind of elevator brake condition monitoring system characterized by comprising

Control module, for when microswitch failure, control elevator to enter urgent motor-operated running state；

Car load detection module, for being detected under the urgent motor-operated running state to car load；

Braking moment detection module, for being detected to the braking moment of brake when the carriage zero load；

Speed of service detection module, for controlling the brake and entering pine when the braking moment is greater than the first preset value Lock state；The elevator, which is controlled, under the state that declutches enters low-speed run state；To institute under the low-speed run state The actual motion speed for stating elevator is detected；Wherein, first preset value refers to when the brake makes carriage stop Braking moment；

Operating status determination module, the speed of service for calculating elevator according to the actual motion speed and pre-set velocity are inclined Difference；When the speed of service deviation is in the first preset range, determine that the brake is in normal operating condition；Wherein, institute It states pre-set velocity and refers to control speed of the elevator under the low-speed run state.

9. elevator brake condition monitoring system according to claim 8, which is characterized in that the car load inspection Module is surveyed for obtaining detection operation request instruction, request instruction is run according to the detection, the car load is examined It surveys.

10. elevator brake condition monitoring system according to claim 8, which is characterized in that the braking moment Detection module is used for when the carriage zero load, is controlled the elevator and is entered detection operational mode；In the detection operational mode After lower acquisition detection sign on, the braking moment of brake is detected.