Safety control method for the car of a tractionless elevator system

Abstract

The present invention discloses a safety regulation method for a car of a tractionless elevator system. The elevator system includes at least two main tracks and a plurality of track cutting devices. The track cutting devices are provided with switching tracks, and the car switches different main tracks through the switching tracks. The elevator system has no traction structure, and the car is driven to run through a driving wheel. The safety regulation method is as follows: set the longest time when the local part of the driving wheel is continuously pressed and no irrecoverable compression deformation will occur as the allowable time; set the time when the car enters the standby or sleep state and stops running as the stop running time; when the stop running time < the allowable time, the car continues to stop running; if the stop running time ≥ the allowable time, start self-checking operation, drive the driving wheel to rotate, and make the driving wheel rotate to different pressure-receiving surfaces. The track cutting two-way detection safety control method of the present invention can prevent the driving wheel from being pressed at the same position for a long time, avoid the compression deformation of the driving wheel due to pressure, and ensure the comfort and safety of the car operation.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator operation control, and particularly relates to a safety regulation method for a car of a tractionless elevator system. Background Art

[0002] At present, elevator cars widely operate in a manner driven by wire rope traction. Only one car can be installed in one hoistway. Elevators with a single-car operation mode can meet the usage requirements in low-rise buildings and places with low pedestrian flow, but in high-rise buildings or super high-rise buildings with a high population density, the disadvantages of long waiting time and low transportation efficiency are significantly magnified. If additional elevator hoistways and corresponding cars are added, it will significantly occupy building space and the cost will also increase significantly. Moreover, the problem of low elevator transportation efficiency still exists.

[0003] With the continuous development of engineering technology level, multi-car operation modes such as double-deck cars, double cars, ring-shaped or bifurcated ring-shaped elevators have gradually emerged. However, in these known multi-car elevator operation modes, the cars are all located on the tracks in the same hoistway, and the elevator cars between hoistways cannot switch tracks for operation, and the cars cannot overtake each other. In the case of a sharp increase in transportation volume, adopting the current multi-car operation mode not only significantly reduces the space utilization rate of the building, but also does not fundamentally solve the problem of low elevator transportation efficiency.

[0004] The multi-car intelligent parallel elevator studied by the applicant is a self-driven elevator, and the driving device requires an external force application mechanism to press the driving wheel against the guide rail surface to generate frictional driving force. However, during the use process, the following problems will exist:

[0005] (1) Long-term compression of the driving wheel will cause the tire to be compressed and shrink and deform;

[0006] (2) If the same position on the tread surface is compressed for a long time, greater deformation will occur, resulting in difficulty in rebounding and resetting;

[0007] (3) The deformed driving wheel will cause the car to have a bumpy feeling during operation, affecting the riding comfort of passengers;

[0008] (4) The deformation of the driving wheel will cause the driving force of the car to decrease, affecting the safe operation of the elevator. Summary of the Invention

[0009] The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a safety regulation method for a car of a tractionless elevator system, which can prevent the same position of the driving wheel from being compressed for a long time, avoid the driving wheel from being compressed and shrinking and deforming, and ensure the comfort and safety of the car during operation.

[0010] To solve the above technical problems, the technical solution proposed by the present invention is as follows:

[0011] A safety regulation method for a car of a tractionless elevator system. The elevator system includes at least two main tracks and a plurality of track switching devices. The track switching devices are provided with switching tracks, and the car switches different main tracks through the switching tracks. The elevator system has no traction structure, and the car is driven to run by a driving wheel; the safety regulation method is as follows:

[0012] Set the longest time when the driving wheel is partially continuously pressed and no irrecoverable compressive deformation occurs as the allowable time; set the time when the car enters the standby or sleep state and stops running as the stop running time;

[0013] When the stop running time < the allowable time, the car continues to stop running;

[0014] If the stop running time ≥ the allowable time, start the self-check operation, drive the driving wheel to rotate, and make the driving wheel rotate to different pressure surfaces.

[0015] As a further improvement of the above technical solution:

[0016] In the above technical solution, preferably, set the stop running time as A and the allowable time as B; during the stop running period, A = A max And when the pressure position of the driving wheel when A ≥ B is the same as the pressure position of the driving wheel when A = 0, start the self-check operation.

[0017] In the above technical solution, preferably, during the self-check operation, the driving wheel rotates a distance greater than one week.

[0018] In the above technical solution, preferably, the driving wheel rotates (n + 1 / 2) turns, where n ≥ 1.

[0019] In the above technical solution, preferably, the specific judgment process of whether to drive the self-check operation is as follows:

[0020] (1) Establishment of the allowable time B sample

[0021] Set multiple different numerical combinations of pressure and stop running time A, detect the magnitude of the deformation of the driving wheel under different compressive loads, and the longest time T when the driving wheel is continuously pressed and no irrecoverable compressive deformation occurs. Then, the allowable time B of the driving wheel under this load when continuously pressed and no irrecoverable compressive deformation occurs is B = T;

[0022] (2) Confirmation of the allowable time B

[0023] Match the actual pressure of the driving wheel with the pressure values in the above step (1), select the pressure that is the same as or closest to the actual pressure value, and obtain the corresponding allowable time B.

[0024] In the above technical solution, preferably, the elevator system is provided with a load monitoring unit, a pressure monitoring unit, a position monitoring unit, a timing unit and a rotational speed monitoring unit;

[0025] The load monitoring unit is used to detect the load value of the driving wheel and calculate the pressure of the driving wheel;

[0026] The timing unit is arranged in the car and is used to calculate the time when the car stops operating;

[0027] The position monitoring unit is arranged on the car and / or the track and is used to detect the position of the car;

[0028] The rotational speed monitoring unit is installed on the driving wheel and is used to detect the distance that the driving wheel rotates.

[0029] The safety regulation method for the car of the tractionless elevator system provided by the present invention has the following advantages compared with the prior art:

[0030] The safety regulation method for the car of the tractionless elevator system of the present invention performs self-check operation on the car during the idle period, prevents the same position of the driving wheel from being pressed for a long time, avoids the shrinkage and deformation of the driving wheel due to pressure, and ensures the comfort and safety of the car operation.

[0031] The safety regulation method for the car of the tractionless elevator system of the present invention can place some cars in a specific storage area and set them to the stopped operation state, so as to improve the comprehensive economic benefit of the elevator system, vacate the main track for other cars, avoid blockage, and improve the operation efficiency of the cars. Brief Description of the Drawings

[0032] Figure 1 is the schematic operation structure diagram of the present invention.

[0033] Figure 2 is the schematic safety regulation principle diagram of the present invention.

[0034] Explanation of the reference numerals in the drawings:

[0035] 1, main track; 11, fixed guide rail; 12, movable guide rail; 2, switching track; 21, fixed switching rail; 22, movable switching rail. Detailed Description of the Invention

[0036] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0037] Figure 1 and Figure 2An embodiment of the safety control method for the car of the tractionless elevator system according to the present invention is shown. The elevator system with multiple cars includes at least two main tracks 1 and multiple track cutting devices. All the main tracks 1 form parallel tracks, and one main track 1 is arranged in each hoistway. Each track cutting device includes a switching track 2 and two track moving components. Multiple switching tracks 2 are arranged between the two main tracks 1. The car switches different main tracks 1 through the translationally moving switching track 2. The main tracks 1 and the switching tracks 2 are arranged in sections. The main track 1 includes multiple sections of fixed guide rails 11 and movable guide rails 12; the main track 1 is formed by splicing multiple sections of fixed guide rails 11 and multiple sections of movable guide rails 12 end to end. The head and tail ends of the rail body are provided with centering and mating tenon grooves to ensure the overall installation centering. The fixed guide rails 11 of the same main track 1 are arranged intermittently. The switching track 2 includes a fixed track cutting part 21 and a movable track cutting part 22. The movable guide rail 12 and the movable track cutting part 22 are arranged at the intermittent position of the adjacent fixed guide rails 11, and the movable track cutting part 22 is arc-shaped. The interval corresponding to the two different main tracks 1 is set as the track changing station. Multiple track changing stations are arranged between the two main tracks 1, and each track changing station is provided with a track cutting device. A track moving component is arranged at the interval of the main track 1. The movable guide rail 12 and the movable track cutting part 22 are not connected to the fixed track cutting part 21 at the same time through the track moving component. The switching track 2 is connected to or disconnected from the two main tracks 1 through the track moving component.

[0038] In this embodiment, because the track needs to be switched, the elevator system cannot be provided with a traction device. The car is driven by a driving wheel, and the driving wheel applies pressure through a corresponding force application mechanism to press tightly on the track running surface of the main track / switching track. There are at least 2 driving wheels, which are respectively located on the two opposite track running surfaces of the "I"-shaped track.

[0039] In this embodiment, since the elevator system is provided with multiple cars to meet the transportation capacity requirements during peak hours, but during off-peak hours, it is not necessary to put so many cars into operation, so some cars need to be put into sleep mode or stopped, so it cannot be ensured that each car runs all the time. And the long-term stop of the driving wheel will cause the local force on the tread to be relatively long, resulting in the deformation of the driving wheel. Therefore, in order to ensure the safety of the car during operation, it is necessary to avoid the situation of local force on the driving wheel.

[0040] In this embodiment, the elevator system is provided with a load monitoring unit, a pressure monitoring unit, a position monitoring unit, a timing unit and a rotational speed monitoring unit.

[0041] A load monitoring unit is installed on the driving member of the car driving wheel. The load monitoring unit can be a force measuring sensor that directly monitors the load force value. According to the load value output by the driving member detected by the force measuring sensor, the pressure Q of the driving wheel can be deduced. In other embodiments, the load monitoring unit can adopt a sensor that monitors deformation, which is used to monitor the deformation amount of the driving wheel. Through the deformation amount of the driving wheel and in combination with the relationship between pressure and deformation, the pressure Q of the driving wheel can be deduced. Or a pressure monitoring unit for detecting the tire pressure is provided on the driving wheel. The pressure monitoring unit adopts a pressure sensor, and the pressure sensor is used to detect the pressure Q received by the driving wheel.

[0042] Each car is provided with a timing unit. The timing unit adopts a timer and is used to calculate the shutdown time of the car.

[0043] The position monitoring unit is arranged on the car and / or the track. Any sensor capable of detecting the position of the car can be used as the position monitoring unit. The rotational speed monitoring unit adopts a rotary encoder, and the rotary encoder is installed on the driving wheel. Through the position monitoring unit and the rotary encoder, it can be ensured that the car can stop at a preset position during self-check operation.

[0044] In this embodiment, the operating states of the car generally include normal operation, maintenance operation or maintenance state, standby sleep, and storage non-operation state. In the standby sleep non-operation state, the car returns to the base station of the elevator system and enters the standby sleep shutdown state. The base station is not necessarily the top floor or the bottom floor. The base station can be set independently according to the main passenger flow situation on the floors. For example, it can be set on floors with relatively dense passenger flows such as the lobby, middle floors, and top floors. When the transportation capacity of the cars in the elevator system is sufficient to meet the demand and there are spare cars, the elevator system can put the idle and non-operating cars into the base station. At this time, the cars parked in the base station are set to the shutdown state to improve the comprehensive economic benefits of the system, make way for other cars on the operation track, avoid congestion, and improve efficiency. Because in the maintenance, standby sleep, and storage non-operation states, the car is in a non-operation state, and the driving wheel will be long-term pressured at the same position. The rebound of the long-term pressured deformation is not easy to recover, resulting in a problem of lag in recovery. In severe cases, creep and permanent deformation states may even occur. The deformed driving wheel will cause the car to run with a bumpy feeling, affecting the running comfort of the car, and will also cause a decrease in the driving force of the elevator, affecting the safe operation of the elevator. Therefore, it is preferred to select different cars to enter the sleep, maintenance, or storage non-operation states. It is preferred to cycle and put into use the cars that have been in the sleep, maintenance, or storage non-operation state for a long time. Especially when the stop time T of a certain car is close to the allowable time B of the driving wheel under pressure, it is preferred to put this car into normal use.

[0045] In this embodiment, let the allowable time of the driving wheel be B, that is, the longest time during which the driving wheel is locally continuously pressed and no irrecoverable compressive deformation occurs; let the stop running time be A, that is, the time when the car enters the standby or sleep state and stops running. If the stop running time A is greater than the allowable time B of the driving wheel, the rebound of the tire's compressive deformation will not easily recover, resulting in the problem of recovery lag. In severe cases, creep and permanent deformation may even occur. The deformed driving wheel will cause the car to run with a bumpy feeling, affecting the running comfort of the car, and will also cause the driving force of the elevator to decrease, affecting the safe operation of the elevator.

[0046] To prevent the driving wheel from having irrecoverable deformation, the safety control method is as follows:

[0047] (1) If A < B, the operation can continue to stop.

[0048] (2) If A ≥ B, during the stop operation period, when A = A max the pressed position of the driving wheel is the same as that when A = 0, the self-check operation is started.

[0049] If it is detected that the stop running time A is less than the allowable time B, the elevator can continue to maintain the stopped state.

[0050] In this embodiment, the allowable time B is determined as follows:

[0051] a. Set different numerical combinations of pressure Q and A, and detect the magnitude of the deformation amount h of the driving wheel under different compressive loads, the longest time T during which the driving wheel is continuously pressed and no irrecoverable compressive deformation occurs, and the recovery time T required for the tire. h .

[0052] b. When the car stops running, the driving wheel is pressed under pressure Q for a time A, and the deformation amount of the driving wheel is h. Then, the allowable time allowable B = T during which the driving wheel is continuously pressed and no irrecoverable compressive deformation occurs under this load can be set.

[0053] In this embodiment, let the time for the driving wheel to rotate one week be t. If T h < t, it is considered that the compressive deformation of the tire has recovered after the driving wheel rotates one week, that is, it has recovered before the second contact with the track at the original deformation position. Then, the compressive deformation of the tread has no influence on the rolling of the driving wheel. At this time, the allowable time B is not restricted; if T hWhen it is greater than or equal to t, that is, when the driving wheel rotates one week, the tread cannot recover. When the unrecovered deformed part contacts the track again, it will affect the operation of the car. At this time, T is set to the allowable time B when the driving wheel is under pressure. Further, in order to reduce the influence of the deformation of the driving wheel on the operation, speed derating operation can be adopted. The overhaul speed or half of the rated speed is used as the rotation speed of the driving wheel to determine the time t. It is considered that for the car running at the derated speed, even if the deformation of the driving wheel has not recovered, the operation of the elevator is safe.

[0054] Multiple groups of allowable time B under multiple groups of pressures Q are obtained through multiple groups of numerical combinations.

[0055] c. Match the actual pressure q detected by the pressure sensor with the pressure Q value in step b above, select the Q closest to q, and obtain the corresponding allowable time B as the determination.

[0056] (3) The self-check operation is to rotate the driving wheel. After the driving wheel rotates, the driving wheel does not stop at the original pressure-bearing position, that is, the rotation needs to make the pressure-bearing position of the driving wheel not in the same position. Preferably, the rotation distance is at least greater than the outer circumference of the driving wheel and does not stop at the previous pressure-bearing position, that is, the driving wheel rotates at least one circle and does not stop at the previous pressure-bearing position, so as to squeeze and restore the previous pressure-bearing position when turning one circle. It is monitored through the position monitoring system of the car, and the elevator is controlled to stop at the preset position.

[0057] When the car stops running, the running surface of the driving wheel is stationary relative to the track. Let the position where the driving wheel contacts the track be W1, and W1 is the pressure-bearing position. The timer calculates the stop running time A of the car.

[0058] In order to avoid the situation that the driving wheel is under pressure for a long time, when it is detected that the stop time A is greater than or equal to the allowable time B, the elevator system will start the self-check operation. After the self-check operation, the contact position between the driving wheel and the track changes. Let the contact position between the driving wheel and the track be W2; W1 and W2 are not the same position. Preferably, the driving wheel is rotated by (n + 1 / 2) circles, n≥1.

[0059] Other structures involved in the present invention are described in the patents already applied for by the applicant. Combined with the conventional technical means of those skilled in the art, it can be fully understood. Therefore, there is no need to repeat the description too much here.

[0060] The above-mentioned embodiments are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A safety control method for a car of a tractionless elevator system, the elevator system comprising at least two main tracks and a plurality of track cutting devices, the track cutting devices being provided with switching tracks, and the car switching different main tracks through the switching tracks, characterized in that, The elevator system has no traction structure, and the car is driven by a driving wheel; the safety control method is as follows: Set the maximum allowable time for the local part of the driving wheel to be continuously pressed without irreversible compressive deformation as the allowable time; set the time when the car enters the standby or sleep state and stops running as the stop running time; When the stop running time < the allowable time, the car continues to stop running; If the stop running time ≥ the allowable time, start the self-check operation, drive the driving wheel to rotate, and make the driving wheel rotate to different pressure surfaces; Let the stop running time be A and the allowable time be B; during the stop running period, A = A max And when A ≥ B, the pressed position of the driving wheel is the same as that when A = 0, then start the self-check running; during the self-check running, the driving wheel rotates a distance greater than one week; The specific judgment process of whether to drive the self-check operation is as follows: (1)Establishment of the allowable time B sample Set multiple groups of different numerical combinations of pressure and stop running time A, detect the magnitude of the deformation of the driving wheel under different compressive loads, and the maximum allowable time T for the driving wheel to be continuously pressed without irreversible compressive deformation, then the allowable time B for the driving wheel to be continuously pressed without irreversible compressive deformation under this load is B = T; (2)Confirmation of the allowable time B Match the actual pressure of the driving wheel with the pressure value in the above step (1), select the pressure with the same or closest value to the actual pressure, and obtain the corresponding allowable time B.

2. The safety control method for a car of a tractionless elevator system according to claim 1, characterized in that, The driving wheel rotates (n + 1 / 2) turns, where n ≥ 1.

3. The safety control method for the car of a tractionless elevator system according to claim 1, characterized in that, The elevator system is provided with a load monitoring unit, a pressure monitoring unit, a position monitoring unit, a timing unit and a rotational speed monitoring unit; The load monitoring unit is used to detect the load value of the driving wheel and calculate the pressure of the driving wheel; The timing unit is arranged in the car and is used to calculate the time when the car stops running; The position monitoring unit is arranged on the car and / or the track and is used to detect the position of the car; The rotational speed monitoring unit is installed on the driving wheel and is used to detect the rotation distance of the driving wheel.

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