Control method of elevator braking system, elevator braking system and elevator

Abstract

The invention discloses a control method of an elevator braking system, the elevator braking system and an elevator, and relates to the technical field of elevator braking systems.The elevator braking system comprises a working brake, a safety brake and a controller, and the controller can independently control the working brake and the safety brake; the control method of the elevator braking system comprises the steps that when the working brake is controlled to brake, related braking data of the working brake are obtained; and when the related braking data exceeds a preset safety data value, the safety brake is controlled to brake. The invention aims to provide the elevator braking system which is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator braking systems, and in particular to a control method of an elevator braking system, an elevator braking system and an elevator. Background Art

[0002] With the popularity of elevators in daily life, elevator accidents continue to occur, especially the more threatening elevator door accident, which has caused great damage to the life safety of passengers. For example, accidents caused by shearing occur frequently across the country. The root cause of the accident is mainly due to the unexpected movement of the elevator car caused by abnormal elevator braking. Therefore, providing a brake system protection measure to improve the reliability of the brake system is an urgent problem to be solved in the entire elevator industry. Summary of the invention

[0003] The main purpose of the present invention is to provide a control method of an elevator braking system, an elevator braking system and an elevator, aiming to provide a safer elevator braking system.

[0004] To achieve the above object, the present invention provides a control method for an elevator braking system, wherein the elevator braking system includes a working brake, a safety brake and a controller, and the controller can independently control the working brake and the safety brake. The steps of the control method for the elevator braking system include:

[0005] When controlling the working brake to brake, obtaining relevant braking data of the working brake;

[0006] When the relevant braking data exceeds a preset safety data value, the safety brake is controlled to brake.

[0007] In one embodiment, the relevant braking data includes the braking duration of the working brake, and when the relevant braking data exceeds a preset safety data value, the step of controlling the safety brake to brake includes:

[0008] When the braking duration of the working brake exceeds a preset duration, the safety brake is controlled to brake.

[0009] In one implementation, the value of the preset duration is adjustable.

[0010] In one embodiment, the relevant braking data includes the moving speed of the elevator after the working brake completes braking;

[0011] When the working brake is controlled to brake, the step of obtaining relevant braking data of the working brake comprises:

[0012] When the working brake completes braking, obtaining the moving speed of the elevator;

[0013] When the relevant braking data exceeds the preset safety data value, the step of controlling the safety brake to brake comprises:

[0014] When the moving speed of the elevator is greater than zero, the safety brake is controlled to brake.

[0015] In one embodiment, the relevant braking data includes a braking acceleration value, and when the relevant braking data exceeds a preset safety data value, the step of controlling the safety brake to brake includes:

[0016] When the braking acceleration value is lower than a preset warning value, the safety brake is controlled to brake.

[0017] In one embodiment, the relevant braking data includes the cumulative braking times of the working brake, and when the relevant braking data exceeds a preset safety data value, the step of controlling the safety brake to brake includes:

[0018] When the accumulated braking times exceeds a preset safety data value, the safety brake is controlled to brake.

[0019] In one embodiment, after the step of controlling the safety brake to brake when the cumulative number of braking times exceeds a preset safety data value, the step further includes:

[0020] The working brake and the safety brake are switched.

[0021] In one embodiment, after the step of controlling the safety brake to brake when the relevant braking data exceeds the preset safety data value, the step further includes:

[0022] When the elevator brake is canceled, the safety brake is first controlled to cancel the brake, and then the working brake is controlled to cancel the brake.

[0023] The present invention also proposes an elevator braking system, wherein the elevator braking system includes a working brake, a safety brake and a controller, the controller is electrically connected to the working brake and the safety brake, the controller includes a memory, a processor and a control program of the elevator braking system stored in the memory and executable on the processor, and the control program of the elevator braking system is configured to implement the steps of the control method of the elevator braking system as described above.

[0024] The present invention also proposes an elevator, wherein the elevator includes an elevator braking system, the elevator braking system includes a working brake, a safety brake and a controller, the controller is electrically connected to the working brake and the safety brake, the controller includes a memory, a processor and a control program of the elevator braking system stored in the memory and executable on the processor, the control program of the elevator braking system is configured to implement the steps of the elevator braking system control method as described above.

[0025] In the technical solution of the present invention, on the basis of the working brake in the elevator braking system, the safety brake is additionally provided, and the working brake and the safety brake are independently controlled by the controller. The safety brake is intended to further provide safety redundancy for the elevator braking system. Correspondingly, when the elevator needs braking, the working brake is normally controlled by the controller. In addition, the present application proposes that the relevant braking data of the working brake should be simultaneously acquired, and the relevant braking data should be compared with the preset safety data value. When the relevant braking data exceeds the preset safety data value, it is judged that there is a safety risk. At this time, the controller issues a braking command to the safety brake, and the safety brake assists the working brake in performing braking operations to improve safety and avoid safety accidents caused by possible safety risks, thereby meeting the requirements of the present application for improving the safety and reliability of the elevator braking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic flow chart of a first embodiment of a control method for an elevator braking system provided by the present invention;

[0028] Figure 2 A schematic flow chart of a second embodiment of a control method for an elevator braking system provided by the present invention;

[0029] Figure 3 A schematic flow chart of a third embodiment of a control method for an elevator braking system provided by the present invention;

[0030] Figure 4 A schematic flow chart of a fourth embodiment of a control method for an elevator braking system provided by the present invention;

[0031] Figure 5 A schematic flow chart of a fifth embodiment of a control method for an elevator braking system provided by the present invention;

[0032] Figure 6 A flow chart of a sixth embodiment of a control method for an elevator braking system provided by the present invention;

[0033] Figure 7 A flow chart of a seventh embodiment of a control method for an elevator braking system provided by the present invention;

[0034] Figure 8 for Figure 1 A schematic diagram of the structure of the control system of the hardware operating environment involved in the embodiment scheme;

[0035] Fig. 9 The present invention provides a simplified schematic diagram of the structure of the elevator braking system.

[0036] Description of Figure Numbers:

[0037] 100. Elevator braking system; 1. Working brake; 2. Safety brake; 3. Controller; 1001. Processor; 1002. Communication bus; 1003. User interface; 1004. Network interface; 1005. Memory.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] 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.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] With the popularity of elevators in daily life, elevator accidents continue to occur, especially the more threatening elevator door accident, which has caused great damage to the life safety of passengers. For example, accidents caused by shearing occur frequently across the country. The root cause of the accident is mainly due to the unexpected movement of the elevator car caused by abnormal elevator braking. Therefore, providing a brake system protection measure to improve the reliability of the brake system is an urgent problem to be solved in the entire elevator industry.

[0043] In view of this, the present invention proposes a control method for an elevator braking system, please refer to Figures 1 to 7 , which is an embodiment of the control method of the elevator braking system proposed by the present invention, the control method of the elevator braking system will be described in detail below with reference to specific drawings.

[0044] See also Figures 1 to 7 The elevator braking system 100 includes a working brake 1, a safety brake 2 and a controller 3. The controller 3 can independently control the working brake 1 and the safety brake 2. The steps of the control method of the elevator braking system 100 include:

[0045] S100: when controlling the working brake 1 to brake, obtaining relevant braking data of the working brake 1;

[0046] S200: When the relevant braking data exceeds a preset safety data value, control the safety brake 2 to brake.

[0047] In the technical solution of the present invention, on the basis of the working brake 1 in the elevator braking system 100, the safety brake 2 is additionally provided, and the working brake 1 and the safety brake 2 are independently controlled by the controller 3. The safety brake 2 is intended to further provide safety redundancy for the elevator braking system 100. Correspondingly, when the elevator needs braking, the working brake 1 is normally controlled by the controller 3 to brake. In addition, the present application proposes that the relevant braking data of the working brake 1 should be simultaneously acquired, and the relevant braking data should be compared with the preset safety data value. When the relevant braking data exceeds the preset safety data value, it is judged that there is a safety risk. At this time, the controller 3 issues a braking command to the safety brake 2, and the safety brake 2 assists the working brake 1 in performing a braking operation to improve safety and avoid safety accidents caused by possible safety risks, thereby meeting the requirements of the present application for improving the safety and reliability of the elevator braking system 100.

[0048] It can be understood that the braking function of the working brake 1 covers all braking scenarios of the elevator, including but not limited to long-term parking, speed control when the elevator moves at an excessive speed, and the most frequent mobile braking, etc., which reduces the service life of the working brake 1 relatively quickly, and high-frequency starting and stopping may also lead to unreliable braking and insufficient braking force.

[0049] In the case where the elevator is parked for a long time when not in use, the working brake 1 continuously applies force to maintain the parked state of the elevator. At this time, the working brake 1 is loaded for a long time, which, on the one hand, affects its service life, and on the other hand, may cause the elevator to move due to abnormal state. Therefore, in order to prevent the service life of the working brake 1 from being reduced and improve the safety of use, in this embodiment, the relevant braking data includes the braking duration of the working brake 1, and the step S200 includes:

[0050] S210: When the braking duration of the working brake 1 exceeds a preset duration, controlling the safety brake 2 to brake.

[0051] That is, the controller 3 obtains the continuous braking time of the working brake 1, and when it exceeds the preset time, it is determined that the elevator is temporarily unused, and the safety brake 2 can be controlled to assist in braking the elevator to share the load of the working brake 1, improve the safety performance, and extend the service life of the working brake 1. It can be understood that the value of the preset time is set as an adjustable value in this embodiment to meet the needs of different usage scenarios, and its specific time is not limited here, and is mainly based on actual setting needs.

[0052] For the situation where the elevator is stopped, the relevant braking data includes the moving speed of the elevator after the working brake 1 completes braking, that is, the controller 3 obtains whether the elevator will move after the working brake 1 completes braking. Here, it is judged that the working brake 1 completes braking by whether the elevator has decelerated to a standstill, or by the controller 3 controlling the working brake 1 to start braking for a certain period of time. It can actually reflect that the elevator should have stopped under normal circumstances. At this time, if the elevator is still moving or moves suddenly after stopping, it can be judged that the working brake 1 is abnormal. That is, in this embodiment, by detecting the moving speed of the elevator, the braking safety of the working brake 1 can be reflected. Based on this, the step S100 includes:

[0053] S110: After the working brake 1 completes braking, the moving speed of the elevator is obtained;

[0054] The step S200 includes:

[0055] S220: When the moving speed of the elevator is greater than zero, the safety brake 2 is controlled to brake.

[0056] In the above steps, it is determined that the elevator has a certain moving speed in a scenario where it should stop, that is, it is determined that the elevator has not been braked to stop normally, including but not limited to the sudden movement of the elevator when it has been parked for a long time and has not received a movement instruction; when the elevator is controlled to be level with the floor, the elevator moves excessively and is misaligned with the floor, etc. At this time, the safety brake 2 is immediately controlled to perform auxiliary braking to ensure the braking safety of the elevator.

[0057] The above two embodiments respectively focus on the intervention of the safety brake 2 during parking and the intervention of the safety brake 2 when the working brake 1 stops abnormally. In this embodiment, the intervention of the safety brake 2 when the braking process of the working brake 1 is abnormal is mainly aimed at. Regardless of the braking situation of the working brake 1, including but not limited to stopping and decelerating, the braking performance of the working brake 1 can be evaluated by the braking acceleration value. Therefore, in this embodiment, the relevant braking data includes the braking acceleration value, and the step S200 includes:

[0058] S230: When the braking acceleration value is lower than a preset warning value, control the safety brake 2 to brake.

[0059] The preset warning value can be set as the minimum braking acceleration required for the elevator during the stopping and deceleration of the elevator. The minimum braking acceleration can be obtained by experimental calculation in advance and is intended to be used as a criterion for judging the braking performance of the working brake 1. Specifically, when the braking acceleration of the working brake 1 is lower than the preset warning value, it cannot complete the deceleration within the deceleration distance set by the system, that is, the reliability of the elevator operation cannot be guaranteed. At this time, the safety brake 2 is controlled to start to supplement the braking force and meet the required braking acceleration value to ensure the braking force for the normal operation of the elevator.

[0060] In addition, in addition to judging the braking performance of the working brake 1 according to the operating process data in the above-mentioned operating state, it can also be judged by the preset working fatigue value of the working brake 1, that is, the braking number safety value, the use time safety value or the braking time safety value of the working brake 1 is preset. In this embodiment, the relevant braking data includes the cumulative braking number of the working brake 1, that is, the step S200 includes:

[0061] S240: When the accumulated braking times exceed a preset safety data value, control the safety brake 2 to brake.

[0062] The controller 3 records the cumulative braking times of the working brake 1 and compares it with the preset safety data value. If it exceeds the preset safety data value, it is determined that the working brake 1 has a risk of brake attenuation. At this time, if the working brake 1 is still used for braking operation, each time the working brake 1 is started, the safety brake 2 is started synchronously to provide protection and improve the safety of the elevator operation.

[0063] Furthermore, after step S240, the method further includes the following steps:

[0064] S250: Switch the working brake 1 and the safety brake 2.

[0065] In other embodiments, when the cumulative number of braking times of the working brake 1 exceeds the preset safety data value, it is determined that the working brake 1 has a hidden danger of brake attenuation. At this time, the working brake 1 is directly replaced with the safety brake 2, and the safety brake 2, which is used less frequently and can ensure the braking force, is used as the main brake, while the working brake 1 whose cumulative number of braking times exceeds the preset safety data value is used as the auxiliary brake of the safety brake 2. This can ensure that the elevator can operate safely and stably when the working brake 1 is in poor condition, waiting for maintenance or replacement, thereby reducing the elevator usage window period and ensuring the safety of elevator use in this situation.

[0066] On this basis, a plurality of identical brakes can be arranged on the elevator. When the elevator needs to brake, some of the brakes are selected in sequence as the working brake 1 for braking, and the remaining brakes are used as the safety brake 2 for braking. In this way, the functions of the working brake 1 and the safety brake 2 are ensured while the degree of wear of each brake is close, thereby extending the service life of the brake.

[0067] Specifically, after step S200, the method further includes the following steps:

[0068] S260: When canceling the brakes on the elevator, first control the safety brake 2 to cancel the brakes, and then control the working brake 1 to cancel the brakes.

[0069] The use of the safety brake 2 is still essentially an auxiliary function. After the working brake 1 is braked, the optional auxiliary braking by the safety brake 2 has been described above, that is, during the braking process, the working brake 1 is activated first, and then the safety brake 2 is assisted. Correspondingly, this embodiment points out that when the elevator releases the brake, the safety brake 2 should be controlled to cancel the brake first, and then the working brake 1 should be controlled to cancel the brake, so as to ensure that the working brake 1 is mainly activated to ensure the stable operation logic of the original braking system of the elevator.

[0070] See also Figures 8 to 9 The elevator braking system 100 includes a working brake 1, a safety brake 2 and a controller 3. The controller 3 is electrically connected to the working brake 1 and the safety brake 2. To implement the control method of the elevator braking system 100 as described above, please refer to Figure 8 , the controller 3 includes: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0071] Those skilled in the art will understand that Figure 8The structure of the controller 3 shown in the figure does not constitute a limitation on the controller 3, and the controller 3 may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0072] like Figure 8 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a control program of the elevator braking system 100 .

[0073] exist Figure 8 In the controller 3 shown, the control program of the elevator braking system 100 stored in the memory 1005 is called by the processor 1001, and the control method of the elevator braking system 100 is executed.

[0074] The present invention also proposes an elevator, wherein the elevator includes the elevator braking system 100. The specific structure of the elevator braking system 100 refers to the above-mentioned embodiment. Since the elevator adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0075] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A control method for an elevator braking system, characterized in that: The elevator braking system comprises a working brake, a safety brake and a controller, wherein the controller can independently control the working brake and the safety brake, and the steps of the control method of the elevator braking system include: When controlling the working brake to brake, obtaining relevant braking data of the working brake; When the relevant braking data exceeds a preset safety data value, the safety brake is controlled to brake.

2. The control method of the elevator braking system according to claim 1, characterized in that: The relevant braking data includes the braking duration of the working brake. When the relevant braking data exceeds the preset safety data value, the step of controlling the safety brake to brake includes: When the braking duration of the working brake exceeds a preset duration, the safety brake is controlled to brake.

3. The control method of the elevator braking system according to claim 2, characterized in that: The value of the preset time length can be adjusted.

4. The control method of the elevator braking system according to claim 1, characterized in that: The relevant braking data includes the moving speed of the elevator after the working brake completes braking; When the working brake is controlled to brake, the step of obtaining relevant braking data of the working brake comprises: When the working brake completes braking, obtaining the moving speed of the elevator; When the relevant braking data exceeds the preset safety data value, the step of controlling the safety brake to brake comprises: When the moving speed of the elevator is greater than zero, the safety brake is controlled to brake.

5. The control method of the elevator braking system according to claim 1, characterized in that: The relevant braking data includes a braking acceleration value, and when the relevant braking data exceeds a preset safety data value, the step of controlling the safety brake to brake includes: When the braking acceleration value is lower than a preset warning value, the safety brake is controlled to brake.

6. The control method of the elevator braking system according to claim 1, characterized in that: The relevant braking data includes the cumulative braking times of the working brake, and when the relevant braking data exceeds the preset safety data value, the step of controlling the safety brake to brake includes: When the accumulated braking times exceeds a preset safety data value, the safety brake is controlled to brake.

7. The control method of the elevator braking system according to claim 6, characterized in that: After the step of controlling the safety brake to brake when the cumulative number of braking times exceeds the preset safety data value, the method further includes the following steps: The working brake and the safety brake are switched.

8. The control method of an elevator braking system according to any one of claims 1 to 7, characterized in that: After the step of controlling the safety brake to brake when the relevant braking data exceeds the preset safety data value, the step further includes: When the elevator brake is canceled, the safety brake is first controlled to cancel the brake, and then the working brake is controlled to cancel the brake.

9. An elevator braking system, characterized in that: The invention comprises a working brake, a safety brake and a controller, wherein the controller is electrically connected to the working brake and the safety brake, the controller comprises a memory, a processor and a control program of the elevator braking system stored in the memory and executable on the processor, and the control program of the elevator braking system is configured to implement the steps of the control method of the elevator braking system as described in any one of claims 1 to 8.

10. An elevator, characterized in that: Comprising the elevator braking system as claimed in claim 9.

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