Elevator speed governor safety tongs linkage test program

Abstract

The invention discloses an elevator speed governor safety tongs linkage test program, and relates to the technical field of elevators, and the elevator speed governor safety tongs linkage test program comprises the following steps: setting stopping target floor parameters; the main control setting enters a test mode and presses an enter key; the control system automatically shields a star sealing signal; when the elevator stops at the target floor and reaches the position between the secondary floor and the target floor, the system automatically outputs a trigger signal to trigger the speed limiter to act; the speed governor provides a feedback signal to the control system after acting; the control system receives a feedback signal, motor output continues, and the traction steel wire rope slips on the traction wheel; according to the invention, the test process is accurately controlled, all parts are ensured to act orderly according to settings, the problems of safety tongs abnormity, steel wire rope looseness and the like caused by sudden braking of the lift car and the like in the test process are effectively avoided, accurate test and subsequent safe operation of an elevator are guaranteed, and meanwhile, the performance of the safety tongs can be accurately tested; and different elevator conditions can be adapted by reasonably setting parameters.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, in particular to a safety clamp linkage test procedure for an elevator speed limiter. Background Art

[0002] In the field of elevator safety testing, the speed limiter safety clamp linkage test is a key link to ensure the safe operation of the elevator. However, there are many problems with the existing elevator speed limiter safety clamp linkage test procedures.

[0003] On the one hand, during the test, when the safety clamp stops the car, there is often a lack of a reasonable response mechanism for the sudden stop of the car, which causes the counterweight to move due to inertia, which can easily lead to problems such as loose traction wire rope and reverse pulling on the car. This will not only cause the safety clamp to reset abnormally and affect the normal progress of the test, but may also interfere with the stopping effect of the safety clamp, making it impossible to accurately test the performance of the safety clamp. On the other hand, this situation may also cause a series of safety hazards and threaten the safety of elevators and related components. In addition, since the existing test procedures do not fully consider these issues and lack corresponding scientific design and precise control, the test results are inaccurate and low in reliability, and cannot effectively guarantee the subsequent safe operation of the elevator.

[0004] In view of this, an elevator speed limiter safety clamp linkage test procedure is provided to overcome the above problems. Summary of the invention

[0005] The object of the present invention is to provide an elevator speed limiter safety clamp linkage test procedure to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides an elevator speed limiter safety clamp linkage test procedure, comprising the following steps:

[0007] Set the speed limiter safety clamp linkage test mode program through the elevator controller, where the elevator needs to be placed on the highest operating floor. The program is entered through the elevator controller keyboard input parameter group or operator, which is the same as the normal test function entry method;

[0008] Set relevant parameters, including:

[0009] Parameter 1: Speed ​​limiter trigger output port function parameters;

[0010] Parameter 2: Function parameter of speed limiter action feedback signal input port;

[0011] Parameter 3: Speed ​​limiter safety clamp stop destination floor parameter;

[0012] Parameter 4: Brake power-off delay time parameter in test mode;

[0013] An electrical trigger device and an action feedback signal switch are installed on the speed limiter in both the machine room and the non-machine room;

[0014] During the test, the satellite is not blocked and the elevator control system automatically blocks the satellite signal.

[0015] For the motor power supply and brake control, before the safety clamp stops, the brake is continuously opened. When the control system receives the speed limiter action feedback signal, it keeps the motor powered and running, so that the traction wire rope slips on the traction wheel. After the time T specified by parameter 4, the motor power supply is cut off and the brake is closed to ensure that when the safety clamp stops, the traction machine continues to provide positive running force to the elevator car to avoid the safety clamp resetting due to the movement of the counterweight after the car stops. At the same time, it ensures that the car is completely stopped by the safety clamp to avoid the brake interfering with the test results;

[0016] After entering the test mode and pressing the confirmation button, the elevator automatically moves to the stop destination floor set by parameter 3. When it reaches the middle position between the secondary floor and the destination floor without decelerating, the main control board automatically outputs a signal to trigger the speed limiter, which then triggers the safety clamp to stop the elevator car.

[0017] After the test is completed, manually exit the system test mode, reset the speed limiter through the remote reset switch of the control cabinet, reset the feedback switch signal of the speed limiter, put the elevator in emergency electric up mode, and mechanically reset the safety clamp.

[0018] Furthermore, the settings of parameter 1 and parameter 2 are accurately set according to the electrical connection requirements of the elevator control system and the speed limiter for correct output and accurate reception of signals.

[0019] Furthermore, the setting of parameter 3 determines the target floor for the elevator to be safely clamped and stopped according to specific test requirements.

[0020] Furthermore, parameter 4 is set based on specific parameters of the elevator and test experience to determine the delay time for the brake to be powered off.

[0021] Furthermore, the electrical trigger device and the action feedback signal switch are installed and connected normally, and the elevator control system recognizes and processes their signals.

[0022] Furthermore, in the motor power supply and brake control step, the time T for which the motor is continuously powered when the brake is open is used to avoid the influence of the counterweight movement on the safety clamp stopping effect and the interference of the brake on the test result.

[0023] Furthermore, in the speed limiter triggering step, the main control board outputs a signal to trigger the speed limiter to operate, and the speed limiter achieves accurate stopping of the elevator car by triggering the safety clamp to operate.

[0024] Furthermore, in the reset step, the operations of manually exiting the system test mode, resetting the speed limiter by the remote reset switch of the control cabinet, and resetting the safety clamp of the elevator emergency electric upward mechanical reset are used to accurately restore the various components of the elevator to a normal state, thereby ensuring the subsequent safe operation of the elevator.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] By introducing formulas based on physical principles and system characteristics to set various parameters, it is ensured that each link can be carried out under the most appropriate conditions, thereby improving the accuracy and scientificity of the experiment.

[0027] The quantitative explanation of each step of the test process from multiple aspects such as electrical connection, signal transmission, and mechanical principles makes the entire test process no longer a simple operation process, but a scientific practice based on rigorous theoretical basis, which helps to deeply understand the principles and necessity behind each step.

[0028] In the parameter setting stage, the functional parameters of the speed limiter trigger output port and the action feedback signal input port are carefully set, taking into full consideration various factors that may affect signal transmission, ensuring the stability and accuracy of signal transmission, thereby ensuring effective communication between the speed limiter and the control system, and laying the foundation for the normal conduct of the test and the acquisition of accurate results.

[0029] In the motor power supply, brake control, and speed limiter triggering links, relevant formulas are used to ensure that each component operates in a reasonable manner at the right time. Specific formulas are used to ensure that the traction machine provides appropriate positive force at the moment of safety clamp stopping to avoid abnormal resetting of the safety clamp; and to ensure that the safety clamp can accurately stop the elevator car without interference from the brake, so that the test can truly reflect the performance of the safety clamp and improve the reliability of the test results.

[0030] In the special control links during the test, the star-sealing process ensures that the star-sealing function does not interfere with the test. The motor power supply and brake control method effectively avoids a series of safety hazards that may be caused by the sudden stop of the car (such as loose wire rope caused by counterweight movement, car back-pulling, etc.), ensuring the safety of the elevator and related components during the test.

[0031] Since the formulas can be calculated and adjusted in detail according to the actual parameters of different elevators (such as different rated speeds, car masses, number of floors, etc.), the test procedure can be widely applied to various types of elevators, with strong versatility and adaptability, and there is no need for large-scale test procedure modifications for different elevators.

[0032] In the reset operation after the test, by setting the matching function between the speed limiter reset success signal value and the normal feedback signal value, as well as the evaluation function between the safety clamp reset state value and the normal operating state value, it is possible to accurately judge whether the speed limiter and safety clamp are successfully reset, thus ensuring the effectiveness of the reset operation.

[0033] Only when the corresponding strict matching requirements are met is the elevator allowed to resume normal operation, which further ensures that the elevator can be safely and stably put into subsequent use after the test.

[0034] The elevator speed limiter safety clamp linkage test procedure shows significant beneficial effects in terms of accuracy, reliability, safety, and adaptability. It can effectively test the performance of the safety clamp and ensure the safe operation of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A system block diagram of an elevator speed limiter safety clamp linkage test procedure of the present invention;

[0036] Figure 2 A circuit diagram of an elevator speed limiter safety clamp linkage test procedure of the present invention;

[0037] Figure 3 The present invention is a flow chart of an elevator speed limiter safety clamp linkage test procedure. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 3 , the present invention provides a technical solution:

[0040] See also Figure 1-Figure 3 As shown, an embodiment of an elevator speed limiter safety clamp linkage test procedure:

[0041] Elevator speed limiter safety clamp linkage test automatic mode operation process

[0042] Preliminary preparation

[0043] Make sure the elevator is in normal operation and has stopped at the highest operating floor. Prepare the elevator controller keyboard or operator to enter the test mode procedure.

[0044] Check whether there is an electrical trigger device and action feedback signal switch of the machine room speed limiter, and ensure that they are properly installed and connected. At the same time, confirm that the elevator control system can correctly identify and process these signals.

[0045] Entering test mode

[0046] Setting up the test mode program

[0047] Enter the parameter group through the elevator controller keyboard or use the operator to enter the speed limiter safety clamp linkage test mode program. This operation method is the same as the current conventional test function.

[0048] Set relevant parameters

[0049] Parameter 1- Speed ​​limiter trigger output port function parameters:

[0050] Assume that the line resistance of the electrical connection between the elevator control system and the speed limiter is R l , inductance is L l , capacitance is C l , the modulation coefficient of signal transmission is m, the coding efficiency is e, and the environmental interference factor is According to the formula:

[0051]

[0052] (where j is the imaginary unit and w is the signal angular frequency) to accurately set this parameter to ensure that the main control board can correctly output the trigger signal to the speed limiter through this port, where P 1 The setting value of parameter 1.

[0053] Parameter 2-Speed ​​limiter action feedback signal input port function parameters:

[0054] Assume that the signal amplification factor of the control system signal is A, the signal filtering efficiency is f, the noise suppression coefficient is n, and the initial strength of the feedback signal is I 0 , the attenuation coefficient of the signal during transmission is According to the formula:

[0055] P 2 =A×f×n×I 0 ×(1-a) l ;

[0056] (where l is the signal transmission distance) Set this parameter to ensure the stability and accuracy of signal transmission. 2 The setting value of parameter 2.

[0057] Parameter 3-speed limiter safety clamp stop destination floor parameters:

[0058] According to the test requirements, the target floor for the elevator to stop with safety clamps is set. Assuming the total number of elevator floors is, the probability distribution function of the test floor selection is:

[0059]

[0060] By formula:

[0061] F = arg F max{p(F)};

[0062] (Select the floor with the highest probability under the test conditions) to determine F. For example, if the test stipulates that the vehicle should stop at the 5th floor, then F = 5, and this F value is the setting of parameter 3.

[0063] Parameter 4- Brake power-off delay time parameter in test mode (T):

[0064] Assume that the rated speed of the elevator is V, the mass of the car is M, the braking coefficient of the safety clamp is B, and the elastic coefficient of the traction system is k e , the damping coefficient of the system is c, according to the formula:

[0065]

[0066] (where Δx is the allowable car displacement when the safety clamp is actuated, calculated through B and other related parameters) According to the specific parameters of the elevator and test experience, the delay time of the brake power off is reasonably set. For example, if T = 3 seconds is calculated, a specific operation sequence can be guaranteed during the safety clamp stopping process.

[0067] Special controls during the test

[0068] Star sealing treatment

[0069] During the entire test process, the satellite blocking function does not intervene. The elevator control system automatically blocks the satellite blocking signal to ensure that the test is not affected by it and to ensure the accuracy of the test environment. Assume that the power spectrum density of the satellite blocking signal is, and the shielding frequency domain function of the control system is, when When , it means the satellite sealing signal is completely shielded.

[0070] Motor power supply and brake control

[0071] Before the safety clamp stops, the brake remains open. When the elevator control system receives the speed limiter action feedback signal, the system still keeps the motor powered and keeps the motor running. At this time, the traction wire rope slips on the traction wheel. After the time set by parameter 4 (such as 3 seconds above), the control system cuts off the power supply to the motor and closes the brake.

[0072] The significance of this control method lies in:

[0073] Assume that the positive force of the traction machine on the car is F 1 The force exerted by the weight on the upper body is F 2 The critical force of traction wire rope loosening is F 3 , the friction between the car and the guide rail is F f , according to formula F 1 ≥F 2 -F 3 +F f At the moment when the safety clamp stops, the traction machine continues to provide positive running force for the elevator car. For example, when the car stops suddenly during normal operation, if there is no positive running force, the counterweight may be thrown up due to inertia, causing the traction wire rope to loosen. The subsequent fall of the counterweight will produce a reverse pulling effect on the car, which may reset the safety clamp and affect the test results. Continuous positive force can avoid this situation.

[0074] Assume the safety clamp stopping force is F s , the brake force is F b , the running resistance of the car on the guide rail is F r , the safety factor is s (s>1), when F s ≥s×(F b +F r ), ensure that the car is completely stopped by the safety clamp, and the brake will not interfere with the test results when it is open. Because if the brake is involved in braking too early, it will change the stopping process and force conditions of the car, and the stopping performance of the safety clamp cannot be accurately tested.

[0075] Speed ​​limiter triggered

[0076] After entering the test mode and pressing the confirmation button, the elevator automatically moves to the stop destination floor set by parameter 3. Assume that the current floor of the elevator is L c , the destination floor is L d , the elevator running speed change function is v(t), and the deceleration threshold speed is v th , when L c <L<L d and (i.e. the elevator runs to When the elevator reaches the middle position (entering the middle position between the second floor and the destination floor) and has not started to decelerate), the main control board automatically outputs a signal to trigger the speed limiter. After the speed limiter receives the trigger signal, it should immediately and actively trigger the safety clamp to stop the elevator car. During this process, pay close attention to the operating status of the elevator and the operation of the speed limiter and safety clamp to ensure that the test is carried out as expected.

[0077] Reset operation after test

[0078] After the test is completed, manually exit the system test mode. Reset the speed limiter through the remote reset switch of the control cabinet to restore the feedback switch signal of the speed limiter to normal.

[0079] Set the speed limiter reset success signal value to R 1 , the normal feedback signal value is R 2 , the signal matching function is m(R 1 ,R 2 )(When R 1 =R 2 When m(R 1 ,R 2 )=1), when m(R 1 ,R 2 )≥0.9 (close to complete match), it indicates that the speed limiter reset is complete.

[0080] Put the elevator into emergency electric up mode and mechanically reset the safety clamp. During the reset process, carefully check whether each component has returned to normal. Set the safety clamp reset state value to S 1 , the normal operating state value is S 2 , the safety gear reset evaluation function is e(S 1 ,S 2 )(When S 1 =S 2 When e(S 1 ,S 2 )=1), when e(S 1 ,S 2 )≥0.95 (stricter matching requirements to ensure safety), ensure that the elevator can safely resume normal operation.

[0081] Through the above embodiments, the automatic mode program of the elevator speed limiter safety clamp linkage test can be completed accurately and safely, the performance of the safety clamp can be effectively tested, and the safe operation of the elevator can be guaranteed.

[0082] The above formula quantifies and explains each step from a deeper perspective of physical principles and system characteristics; it not only helps to better understand and optimize the entire test process, but also further strengthens the logical connection between the various steps, making the entire test process more closely centered around ensuring accurate test execution and safe elevator operation. At the same time, the above formula can be calculated and adjusted in detail according to the actual parameters of different elevators, and has wide applicability.

[0083] Summarize:

[0084] By introducing formulas based on physical principles and system characteristics to set various parameters, for example, parameter 1 takes into account electrical connection characteristics and signal transmission factors, parameter 2 takes into account signal reception and transmission attenuation, parameter 3 reasonably determines the stopping floor based on floor probability distribution, and parameter 4 sets the brake power-off delay time in combination with various elevator operating parameters. This precise setting ensures that each link can be carried out under the most suitable conditions, improving the accuracy and scientificity of the test.

[0085] The quantitative explanation of each step of the test process from multiple aspects such as electrical connection, signal transmission, and mechanical principles makes the entire test process no longer a simple operation process, but a scientific practice based on rigorous theoretical basis, which helps to deeply understand the principles and necessity behind each step.

[0086] In the parameter setting stage, the functional parameters of the speed limiter trigger output port and the action feedback signal input port are carefully set, taking into full consideration various factors that may affect signal transmission, ensuring the stability and accuracy of signal transmission, thereby ensuring effective communication between the speed limiter and the control system, and laying the foundation for the normal conduct of the test and the acquisition of accurate results.

[0087] In the links of motor power supply, brake control, speed limiter triggering, etc., relevant formulas are used to ensure that each component operates in a reasonable manner at the right time. For example, a specific formula is used to ensure that the traction machine provides a suitable positive force at the moment of safety clamp stopping to avoid abnormal resetting of the safety clamp; and to ensure that the safety clamp can accurately stop the elevator car without interference from the brake, so that the test can truly reflect the performance of the safety clamp and improve the reliability of the test results.

[0088] Special control links in the test process, such as the star-sealing process, ensure that the star-sealing function does not interfere with the test. The motor power supply and brake control method effectively avoid a series of safety hazards that may be caused by the sudden stop of the car (such as loose wire rope caused by counterweight movement, car back-pulling, etc.), ensuring the safety of the elevator and related components during the test.

[0089] Since the formulas can be calculated and adjusted in detail according to the actual parameters of different elevators (such as different rated speeds, car masses, number of floors, etc.), the test procedure can be widely applied to various types of elevators, with strong versatility and adaptability, and there is no need for large-scale test procedure modifications for different elevators.

[0090] In the reset operation after the test, by setting the matching function between the speed limiter reset success signal value and the normal feedback signal value, as well as the evaluation function between the safety clamp reset state value and the normal operating state value, it is possible to accurately judge whether the speed limiter and safety clamp are successfully reset, thus ensuring the effectiveness of the reset operation.

[0091] The elevator is allowed to resume normal operation only when the corresponding strict matching requirements are met (such as the speed limiter reset matching degree is close to complete matching and the safety clamp reset evaluation meets more stringent matching requirements), which further ensures that the elevator can be safely and stably put into subsequent use after the test.

[0092] In summary, the elevator speed limiter safety clamp linkage test procedure has shown significant beneficial effects in terms of accuracy, reliability, safety, and adaptability. It can effectively test the performance of the safety clamp and ensure the safe operation of the elevator.

Claims

1. An elevator speed limiter safety gear linkage test procedure, characterized in that: The following steps are involved: Set the speed limiter safety gear linkage test mode program through the elevator controller, where the elevator needs to be placed on the highest operating floor. The program is entered by inputting parameter groups on the elevator controller keyboard or by the operator, in the same way as the normal test function entry; Set relevant parameters, including: Parameter 1: Speed ​​limiter trigger output port function parameters; Parameter 2: Speed ​​limiter action feedback signal input port function parameters; Parameter 3: Speed ​​limiter safety clamp stop destination floor parameter; Parameter 4: Brake power-off delay time parameter in test mode; An electrical trigger device and an action feedback signal switch are installed on the speed limiter in both the machine room and the non-machine room; During the test, the satellite is not blocked and the elevator control system automatically blocks the satellite blocking signal. For motor power supply and brake control, before the safety clamp stops, the brake is continuously open. When the control system receives the speed limiter action feedback signal, it keeps the motor powered and running, so that the traction wire rope slips on the traction sheave. After the time T specified by parameter 4, the motor power is cut off and the brake is closed. This ensures that when the safety clamp stops, the traction machine continues to provide forward running force to the elevator car, avoiding the safety clamp resetting due to the movement of the counterweight after the car stops. At the same time, it ensures that the car is completely stopped by the safety clamp to avoid the brake interfering with the test results. After entering the test mode and pressing the confirmation button, the elevator automatically runs to the stopping destination floor set by parameter 3. When it reaches the middle position between the secondary floor and the destination floor without decelerating, the main control board automatically outputs a signal to trigger the speed limiter, which in turn triggers the safety clamp to stop the elevator car. After the test is completed, manually exit the system test mode, reset the speed limiter through the remote reset switch of the control cabinet, reset the feedback switch signal of the speed limiter, put the elevator into emergency electric up mode, and mechanically reset the safety clamp.

2. An elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: The settings of parameters 1 and 2 should be accurately set according to the electrical connection requirements of the elevator control system and the speed limiter for correct output and accurate reception of signals.

3. An elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: The setting of parameter 3 determines the target floor for the elevator to stop safely according to the specific test requirements.

4. An elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: The setting of parameter 4 is based on the specific parameters of the elevator and test experience, and is used to determine the delay time for brake power off.

5. The elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: The electrical trigger device and action feedback signal switch are installed and connected normally, and the elevator control system recognizes and processes their signals.

6. An elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: In the motor power supply and brake control steps, the time T for which the motor is continuously powered when the brake is open is used to prevent the counterweight movement from affecting the safety clamp's stopping effect and the brake from interfering with the test results.

7. An elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: In the speed limiter triggering step, the main control board outputs a signal to trigger the speed limiter to operate, and the speed limiter achieves accurate stopping of the elevator car by triggering the safety clamp to operate.

8. The elevator speed governor safety gear linkage test procedure according to claim 1, characterized in that: In the reset step, the operations of manually exiting the system test mode, resetting the speed limiter by the remote reset switch of the control cabinet, and resetting the safety clamp of the elevator emergency electric upward mechanical reset are used to accurately restore the various components of the elevator to normal status.

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