An elevator emergency braking method, system, device, and medium

Abstract

This invention provides an elevator emergency braking method, system, device, and medium. The method includes the following steps: obtaining a preset safe speed threshold; determining that the elevator car's operating speed exceeds the safe speed threshold and triggering a danger signal; obtaining the elevator car's position and weight, and controlling the elevator guide rails to perform actions based on the danger signal, thereby tightening the elevator track formed between the guide rails and performing emergency braking on the elevator car; the hydraulic cylinder and / or expansion device in the solution recognize the signal and act quickly, driving the mechanical actuator to extend specific elevator guide rails according to the designed action, thereby tightening the elevator car track, gradually increasing the friction force on the elevator car, and ultimately achieving the stopping function; the solution can achieve car deceleration, clamping, and stopping, and has higher safety, and can be widely applied in the field of elevator control technology.

Description

Technical Field

[0001] This invention relates to the field of elevator control technology, and in particular to an elevator emergency braking method, system, device and medium. Background Technology

[0002] With the increasing number of high-rise buildings, elevators have become an essential tool for transporting people in buildings, and their operational safety is a primary concern for users. In elevator safety management scenarios, elevator malfunction leading to excessive speed and bottoming out is a common and serious safety hazard. To prevent this, elevators are typically equipped with various emergency stopping devices. Common safety components include traction machine self-locking mechanisms, safety brakes, and buffer bases; however, all of these safety components carry the risk of slippage. Summary of the Invention

[0003] In view of this, in order to at least partially solve one of the above-mentioned technical problems or defects, the purpose of the embodiments of the present invention is to provide a safer elevator emergency braking method, as well as a corresponding system, device and computer storage medium.

[0004] On the one hand, the technical solution of this application provides an elevator emergency braking method, including the following steps:

[0005] Obtain the preset safe speed threshold;

[0006] If the elevator car's operating speed exceeds the safe speed threshold, a hazard signal is triggered.

[0007] The elevator car position and weight are obtained, and the elevator guide rails are controlled to perform actions in conjunction with the danger signal, so that the elevator track formed between the elevator guide rails is tightened and the elevator car is braked in an emergency.

[0008] The actions performed by controlling the elevator guide rails include at least one of the following:

[0009] The hydraulic rod in the hydraulic cylinder is extended to the first position, and the hydraulic cylinder is kept pressurized, so that the elevator track is tightened.

[0010] The expansion device expands according to the danger signal, pushing out the elevator guide rail that is close to the expansion device, thereby tightening the elevator rail.

[0011] The hydraulic cylinders are evenly distributed along the elevator guide rail, and the expansion device is located at the bottom of the elevator guide rail.

[0012] In one feasible embodiment of the present application, tightening the elevator track formed between the elevator guide rails includes at least one of the following steps:

[0013] Control the elevator guide rails to move in opposite directions, and determine that the first track width of the tightened elevator track is less than the second track width of the elevator track before tightening;

[0014] The elevator guide rail is tilted such that the width of the third track of the elevator is proportional to the vertical distance between the elevator track and the ground.

[0015] In one feasible embodiment of the present application, the hydraulic rod in the control hydraulic cylinder extends to a first position, and the hydraulic cylinder remains pressurized, thereby tightening the elevator track, including:

[0016] The hydraulic circuit is activated based on the elevator car position, car weight, and the danger signal.

[0017] The hydraulic circuit is driven to control the hydraulic rod in the hydraulic cylinder to extend to the first position and trigger a displacement signal;

[0018] The displacement signal controls the hydraulic circuit to form a self-locking circuit, which keeps the hydraulic cylinder pressurized, thereby tightening the elevator track.

[0019] In one feasible embodiment of the present application, the step of controlling the hydraulic circuit to form a self-locking circuit according to the displacement signal, and using the self-locking circuit to keep the hydraulic cylinder in a pressurized state, thereby tightening the elevator track, includes:

[0020] The electromagnetic check valve connected in series with the hydraulic cylinder is closed according to the displacement signal, so that the hydraulic cylinder stops supplying oil and enters the pressure relief cycle state.

[0021] In one feasible embodiment of the present application, the step of inflating the expansion device according to the danger signal to push out the elevator guide rail close to the expansion device, thereby tightening the elevator track, includes:

[0022] According to the danger signal, high-pressure gas is released in the expansion device, and the high-pressure gas pushes the push rod piston of the expansion device.

[0023] The elevator guide rail is pushed out by the push rod piston;

[0024] The pawls installed on the elevator shaft wall engage with the ratchet strips installed on the outer surface of the expansion device to fix the push rod piston.

[0025] On the other hand, the technical solution of this application also provides an elevator emergency braking system, which includes:

[0026] The sensor unit is used to acquire the elevator car's running speed, car position, and car weight.

[0027] The signal processing unit is used to obtain a preset safe speed threshold, determine that the elevator car's running speed exceeds the safe speed threshold, and trigger a danger signal.

[0028] The elevator braking unit is used to obtain the position and weight of the elevator car, and control the elevator guide rail to perform actions in conjunction with the danger signal, so that the elevator track formed between the elevator guide rails is tightened and the elevator car is braked in an emergency.

[0029] The elevator braking unit includes a hydraulic module, a mechanical actuator, and an expansion device; the hydraulic module is evenly distributed along the elevator guide rail, and the expansion device is located at the bottom of the elevator guide rail;

[0030] The hydraulic module is used to control the hydraulic rod in the hydraulic cylinder to extend to the first position and to keep the hydraulic cylinder under pressure.

[0031] The mechanical actuator is used to control the tightening of the elevator guide rail through the transmission of the hydraulic module;

[0032] The expansion device is used to expand according to the danger signal, push out the elevator guide rail close to the expansion device, and tighten the elevator rail.

[0033] In one feasible embodiment of the present application, the hydraulic module includes a hydraulic circuit, a hydraulic cylinder, and a displacement sensor;

[0034] The hydraulic circuit is used to form a self-locking circuit based on the displacement signal, and the self-locking circuit keeps the hydraulic cylinder in a pressurized state, thereby tightening the elevator track.

[0035] The hydraulic cylinder is used to activate the hydraulic circuit according to the elevator car position, car weight, and the danger signal; and drive the hydraulic circuit to control the hydraulic rod in the hydraulic cylinder to extend to the first position;

[0036] The displacement sensor is used to collect position information of the hydraulic rod extending from the hydraulic cylinder.

[0037] In one feasible embodiment of the present application, the outer surface of the expansion device is provided with a ratchet, and the outer surface of the elevator shaft wall is provided with a pawl; the pawl meshes with the ratchet; the expansion device is provided with a push rod piston and a reaction chamber, and the reaction chamber is filled with an explosive reaction reagent.

[0038] On the other hand, the present application also provides an elevator emergency braking device, which includes at least one processor; at least one memory for storing at least one program; when the at least one program is executed by the at least one processor, the at least one processor performs an elevator emergency braking method as described in the first aspect.

[0039] On the other hand, the present application also provides a storage medium storing a processor-executable program, which, when executed by a processor, is used to perform an elevator emergency braking method as described in any one of the first aspects.

[0040] The advantages and beneficial effects of the present invention will be set forth in part in the following description, and the rest will become apparent from the specific embodiments thereof:

[0041] This application provides an elevator emergency braking scheme. When the elevator's operating speed exceeds the safe speed, the speed sensor identifies a danger signal and transmits the signal to the signal processor. The signal processor sends information to the hydraulic module, and the hydraulic cylinder and / or expansion device recognize the signal and act quickly, driving the mechanical actuator to extend the elevator's specific guide rails according to the design action. This causes the elevator car's track to tighten, gradually increasing the friction force on the elevator car, ultimately achieving the stopping function. The scheme can achieve deceleration, clamping, and stopping of the car, and is safer. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of a module of an elevator emergency braking system provided in the technical solution of this application;

[0044] Figure 2 This is a schematic diagram of a sub-module of the hydraulic module in the technical solution of this application;

[0045] Figure 3 This is a schematic diagram of the narrowing and tightening of the elevator track in the technical solution of this application;

[0046] Figure 4 This is a schematic diagram of the V-shaped structure formed by the elevator track in the technical solution of this application;

[0047] Figure 5 This is a schematic diagram of the expansion structure in the technical solution of this application;

[0048] Figure 6 This is a flowchart illustrating the steps of an elevator emergency braking system provided in the technical solution of this application. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The step numbers in the following embodiments are set only for ease of explanation, and there is no limitation on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0050] Based on the aforementioned technical background description, a common emergency braking method in related technical solutions is to use a progressive safety clamp, which uses the clamp's internal grips to tighten the guide rail and complete the braking. However, the safety clamps and other safety components used in these solutions all carry the risk of slippage.

[0051] In a first aspect, the present application provides an elevator emergency braking system, which includes a sensor unit, a signal processing unit, and an elevator braking unit.

[0052] The system includes a sensor unit for acquiring the elevator car's operating speed, car position, and car weight; a signal processing unit or signal processor for acquiring a preset safe speed threshold, determining that the elevator car's operating speed exceeds the safe speed threshold, and triggering a hazard signal; and an elevator braking unit for acquiring the elevator car's car position and weight, and, in conjunction with the hazard signal, controlling the elevator guide rails to perform actions that tighten the elevator track formed between the guide rails, thereby applying emergency braking to the elevator car.

[0053] Specifically, such as Figure 1 As shown, the sensor unit may include a position detector, a speed sensor, and a load cell. When the elevator's operating speed exceeds the safe speed, the speed sensor identifies the danger signal and transmits it to the signal processor or signal processing unit. In the embodiment system, during the signal processor's processing of the identified signal, the position detector monitors the car's position in real time, the load cell reads the car's total weight, and the speed sensor reads the car's initial braking speed and identifies the elevator overspeed danger signal. These three sensors provide data support for the signal transmitted by the signal processor to the elevator braking unit in the system.

[0054] Furthermore, in this embodiment, the elevator braking unit includes a hydraulic module, a mechanical actuation structure, and an expansion device; the hydraulic module is evenly distributed along the elevator guide rail, and the expansion device is disposed at the bottom of the elevator guide rail. More specifically, as... Figure 1 As shown, a hydraulic module is used to control the hydraulic rod in the hydraulic cylinder to extend to a first position and keep the hydraulic cylinder pressurized; a mechanical actuator is used to control the elevator guide rail to tighten through the transmission of the hydraulic module; and an expansion device is used to expand the expansion device according to the danger signal, push out the elevator guide rail close to the expansion device, and tighten the elevator track.

[0055] In some feasible implementations, such as Figure 2 As shown, the hydraulic module in the system includes a hydraulic circuit, a hydraulic cylinder, and a displacement sensor.

[0056] The hydraulic circuit is used to form a self-locking circuit based on the displacement signal, and the self-locking circuit keeps the hydraulic cylinder in a pressurized state, thereby tightening the elevator track; the hydraulic cylinder is used to activate the hydraulic circuit based on the elevator car position, car weight, and the danger signal; and to drive the hydraulic circuit to control the hydraulic rod in the hydraulic cylinder to extend to the first position; the displacement sensor is used to collect the position information of the extended hydraulic rod in the hydraulic cylinder.

[0057] Specifically, in the embodiments, such as Figure 3 As shown, the working principle of emergency braking via a hydraulic module in this embodiment is to utilize a mechanical actuator to change the guide rail spacing, gradually increasing the friction force on the elevator, ultimately achieving the stopping function. When the stopping device is triggered, the hydraulic cylinders 304 installed on both sides of the guide rail 303 extend in an orderly manner under the control of the hydraulic circuit. First, they gradually push out of the guide rail 303 where the elevator car guide device 301 is located, causing the car to decelerate to a predetermined value within the set braking stroke. Then, the signal processor controls the hydraulic circuit to drive the hydraulic cylinders 304 in an orderly manner, controlling the guide rail 303 to move towards each other, causing the elevator track to tighten and narrow, increasing the resistance on the elevator car 302 until it finally stops at a certain point on the guide rail 303. If the motion detector does not detect any action of the mechanical actuator, the signal processor sends a signal to drive the expansion device 305. It should be noted that in some other feasible embodiments, such as Figure 4 As shown, during the emergency braking of the elevator car 302, the position information of the elevator car 302 collected by the position detector can be transmitted to the signal processor, which then controls the hydraulic circuit to drive the hydraulic cylinder 304 in an orderly manner to transform the guide rail 303 into a V-shaped elevator track. Alternatively, in this embodiment, one or more sets of expansion devices 305 located at the bottom of the guide rail 303 can be driven to push the guide rails to move in opposite directions, thereby forming a V-shaped elevator track.

[0058] More specifically, during the braking process of the system device in this embodiment, the signal processor controls a single hydraulic cylinder as follows: After receiving the command to start the hydraulic module, the signal processor starts the hydraulic pump in the hydraulic circuit, driving the hydraulic circuit. At this time, the hydraulic cylinder in the system begins to extend until the hydraulic rod extends to the designated position. The displacement sensor identifies the signal and feeds it back to the signal processor. The signal processor then stops closing the solenoid check valve connected in series with the hydraulic cylinder, and the hydraulic cylinder stops supplying oil. Due to the self-locking circuit, the hydraulic rod is stationary at a certain position and does not move. When the processor identifies the signals from all displacement sensors, the signal processor controls the hydraulic circuit to stop supplying oil to each hydraulic cylinder, and the oil circuit enters a depressurization cycle state, awaiting a new command. When the speed sensor detects that the car has stopped at a certain position on the guide rail, the signal processor controls the hydraulic circuit to stop working. At this time, the hydraulic cylinder is still in a pressurized state due to the existence of the self-locking circuit.

[0059] Due to the length and material of the guide rails, to increase their rigidity, the hydraulic cylinders should be evenly distributed along the guide rails, increasing their number to withstand the braking impact at dangerous speeds when the elevator car is fully loaded. Because of the risk of hydraulic module failure, one or more expansion devices are added to the bottom of the guide rails as needed. This allows for a rapid response in the event of a hydraulic module failure, pushing the guide rails outward a specified distance to reduce the guide rail spacing and thus decelerate the elevator car, reducing the severity of injury to passengers. Therefore, some feasible implementations of the technical solution in this application include... Figure 5 As shown, the outer surface of the expansion device is provided with a ratchet 501, and the outer surface of the elevator shaft wall is provided with a pawl 502; the pawl 501 meshes with the ratchet 502; the expansion device is provided with a push rod piston 503 and a reaction chamber 504, and the reaction chamber 504 is filled with an explosive reaction reagent.

[0060] The expansion device consists of a ratchet, pawl, push rod piston, and explosive reaction reagent. The push rod piston is welded to the ratchet on the outside, and the internal baffle of the push rod piston is threadedly connected to the push rod. Rotating the thread adjusts the loading of the explosive reaction reagent, thereby controlling the intensity of the explosion reaction and thus controlling the distance the push rod extends. Due to the presence of the ratchet and pawl, the push rod piston can only push outward after its action, and cannot push inward, ensuring that the guide rail and the car are always pressed together, achieving deceleration and stopping.

[0061] like Figure 6 As shown, based on the elevator emergency braking system provided in the first aspect, the embodiments of the technical solution of this application provide an elevator emergency braking method, which mainly includes steps S100-S300:

[0062] S100, Obtain the preset safe speed threshold;

[0063] S200: If the elevator car's operating speed exceeds the safe speed threshold, a hazard signal is triggered.

[0064] S300: Obtain the elevator car position and car weight, and control the elevator guide rail to perform actions in conjunction with the danger signal, so that the elevator track formed between the elevator guide rails is tightened and the elevator car is braked in an emergency.

[0065] The process of controlling the elevator guide rail to perform actions may include at least one of steps S301 and S302:

[0066] S301. Control the hydraulic rod in the hydraulic cylinder to extend to the first position and keep the hydraulic cylinder in a pressurized state, so that the elevator track is tightened;

[0067] S302. Based on the danger signal, the expansion device expands to push out the elevator guide rail that is close to the expansion device, thereby tightening the elevator rail.

[0068] Specifically, in this embodiment, when the elevator's operating speed exceeds the safe speed, the speed sensor identifies a danger signal and transmits it to the signal processor. The signal processor then sends information to the hydraulic module, which, upon recognizing the signal, quickly activates the mechanical actuator to extend specific elevator guide rails according to the designed action, thereby achieving deceleration, clamping, and stopping of the car. Simultaneously, after being driven by the hydraulic module, the motion detector initiates motion detection of the mechanical actuator and transmits the detection result signal to the signal processor. If the motion detector does not detect any action from the mechanical actuator, the signal processor sends a signal to drive the expansion device. Upon receiving the signal, the expansion device immediately triggers an explosive reaction, rapidly generating high-pressure gas within the device. This gas pushes the internal partition of the expansion device, which then pushes out the nearest guide rail in a predetermined direction. To prevent the pushed-out guide rail from retracting upon contact with the car, a one-way movement mechanism is provided on the outside of the expansion device. In this embodiment, a ratchet and pawl mechanism is used as an example. By controlling the length of the push rod inside the pusher piston and the quantity and composition of the chemical reaction reagents, the distance the expansion device pushes out of the guide rail can be controlled, thus achieving the extension and retraction distance and angle of the guide rail, thereby replacing the hydraulic module in driving the mechanical actuator to perform specific actions. During the signal processing system's signal identification process, the position detector monitors the car's position in real time, the weighing sensor reads the car's total weight, and the speed sensor reads the car's initial braking speed and identifies the elevator's overspeed danger signal. These three provide the basis for the signal processor to transmit signals to the hydraulic system, thereby achieving a more comfortable stopping of the elevator car.

[0069] In some feasible implementations, the process of tightening the elevator track formed between the elevator guide rails may include steps S303 and S304:

[0070] S303. Control the elevator guide rails to move towards each other, and determine that the first track width of the tightened elevator track is less than the second track width of the elevator track before tightening.

[0071] Specifically, in the embodiment, when the braking device is triggered, the hydraulic cylinders installed on both sides of the guide rail extend in an orderly manner under the control of the hydraulic circuit. First, they gradually push out of the guide rail where the elevator car guide device is located, so that the car decelerates to a predetermined value within the set braking stroke. Then, the signal processor controls the hydraulic circuit to drive the hydraulic cylinders in an orderly manner to control the guide rail to move in opposite directions, so that the elevator track tightens and narrows, and the resistance of the elevator car increases until it finally stops at a certain point on the guide rail.

[0072] S304. Control the elevator guide rail to tilt so that the width of the third track of the elevator rail is proportional to the vertical distance between the elevator rail and the ground;

[0073] Specifically, in the embodiment, when the braking device is triggered, the hydraulic cylinders installed on both sides of the guide rail extend in an orderly manner under the control of the hydraulic circuit. First, the guide rail is pushed out in a gradual parallel manner, so that the car decelerates to a predetermined value within the set braking stroke. Then, the signal processor controls the hydraulic circuit to drive the hydraulic cylinders in an orderly manner to change the guide rail into an elevator track that is wider at the top and narrower at the bottom, such as a V-shaped track, so that the resistance on the car increases and eventually stops at a certain point on the guide rail.

[0074] In some feasible implementations, the process of extending the hydraulic rod in the control hydraulic cylinder to a first position and keeping the hydraulic cylinder pressurized to tighten the elevator track may include steps S3011-S3013:

[0075] S3011. The hydraulic circuit is activated based on the elevator car position, car weight, and the danger signal.

[0076] S3012, Drive the hydraulic circuit to control the hydraulic rod in the hydraulic cylinder to extend to the first position and trigger a displacement signal;

[0077] S3013. The hydraulic circuit is controlled to form a self-locking circuit according to the displacement signal. The self-locking circuit keeps the hydraulic cylinder in a pressurized state, thereby tightening the elevator track. In some feasible embodiments, the system can close the electromagnetic check valve connected in series with the hydraulic cylinder according to the displacement signal, so that the hydraulic cylinder stops supplying oil and enters a depressurization cycle state.

[0078] Specifically, in this embodiment, after receiving the command to start the hydraulic module, the signal processor starts the hydraulic pump in the hydraulic circuit, driving the hydraulic circuit. At this time, the hydraulic cylinder in the system begins to extend until the hydraulic rod extends to the designated position. The displacement sensor identifies the signal and feeds it back to the signal processor. The signal processor then stops closing the solenoid check valve connected in series with the hydraulic cylinder, and the hydraulic cylinder stops supplying oil. Due to the self-locking circuit, the hydraulic rod is stationary at a certain position and does not move. When the processor identifies the signals from all displacement sensors, it controls the hydraulic circuit to stop supplying oil to each hydraulic cylinder, and the oil circuit enters a depressurization cycle state, awaiting a new command. When the speed sensor detects that the car has stopped at a certain position on the guide rail, the signal processor controls the hydraulic circuit to stop working. At this time, the hydraulic cylinder remains pressurized due to the existence of the self-locking circuit.

[0079] In some feasible implementations, the step of inflating the expansion device according to the danger signal to push out the elevator guide rail close to the expansion device and tighten the elevator rail may include steps S3021-S3023:

[0080] S3021. Based on the danger signal, high-pressure gas is released in the expansion device, and the high-pressure gas pushes the push rod piston of the expansion device.

[0081] S3022, The elevator guide rail is pushed out by the push rod piston;

[0082] S3023. A pawl provided on the wall of the elevator shaft engages with a ratchet provided on the outer surface of the expansion device to fix the push rod piston.

[0083] Specifically, in this embodiment, the expansion device comprises a ratchet, pawl, push rod piston, and explosive reaction reagent. The push rod piston is welded to the ratchet on the outside, and the internal partition of the push rod piston is threadedly connected to the push rod. By rotating the thread, the loading amount of the explosive reaction reagent can be adjusted, thereby controlling the intensity of the explosion reaction and thus controlling the distance the push rod is pushed out. Due to the presence of the ratchet and pawl, the push rod piston can only push outward after its action, and cannot push inward, ensuring that the guide rail and the car are always pressed together, achieving deceleration and stopping.

[0084] On the other hand, the present application also provides an elevator emergency braking device, which includes: at least one processor; at least one memory for storing at least one program; when the at least one program is executed by the at least one processor, the at least one processor performs an elevator emergency braking method as described in the second aspect.

[0085] This invention also provides a storage medium storing a corresponding executable program, which is executed by a processor to implement an elevator emergency braking method as described in the first aspect.

[0086] From the above specific implementation process, it can be concluded that the technical solution provided by the present invention has the following advantages or strengths compared with the prior art:

[0087] The present invention enables the elevator car to decelerate and stop in an orderly manner. While achieving the goal of stopping the elevator car, the braking process is also relatively comfortable.

[0088] Furthermore, although the invention has been described in the context of functional modules, it should be understood that, unless otherwise stated, one or more of the functions and / or features may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the invention. Rather, given the properties, functions, and internal relationships of the various functional modules in the apparatus disclosed herein, the actual implementation of the module will be understood within the scope of conventional skill of an engineer. Therefore, those skilled in the art can implement the invention as set forth in the claims using ordinary techniques without excessive experimentation. It is also understood that the specific concepts disclosed are merely illustrative and not intended to limit the scope of the invention, which is determined by the full scope of the appended claims and their equivalents.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0090] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

[0092] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An elevator emergency braking method, characterized in that, Includes the following steps: Obtain the preset safe speed threshold; If the elevator car's operating speed exceeds the safe speed threshold, a hazard signal is triggered. The elevator car position and weight are obtained, and the elevator guide rails are controlled to perform actions in conjunction with the danger signal, so that the elevator track formed between the elevator guide rails is tightened and the elevator car is braked in an emergency. Among them, the actions performed by controlling the elevator guide rails are: The hydraulic rod in the hydraulic cylinder is extended to the first position, and the hydraulic cylinder is kept pressurized, so that the elevator track is tightened. When no movement of the elevator guide rail is detected, the expansion device is expanded according to the danger signal, pushing out the elevator guide rail close to the expansion device, thereby tightening the elevator track. The hydraulic cylinders are evenly distributed along the elevator guide rail, and the expansion device is located at the bottom of the elevator guide rail; The method of tightening the elevator track formed between the elevator guide rails includes at least one of the following steps: controlling the elevator guide rails to move towards each other, and determining that the first track width of the tightened elevator track is less than the second track width of the elevator track before tightening; controlling the elevator guide rails to tilt, such that the third track width of the elevator track is proportional to the vertical distance between the elevator track and the ground; The control of the elevator guide rails to move in opposite directions, and the determination that the first track width of the tightened elevator track is less than the second track width of the elevator track before tightening, includes: when a danger signal is triggered, the hydraulic cylinders installed on both sides of the guide rails extend in an orderly manner under the control of the hydraulic circuit, first gradually and parallelly pushing out the guide rail where the elevator car guide device is located, so that the car decelerates to a predetermined value within a set braking stroke, and then the hydraulic circuit is controlled to drive the hydraulic cylinders in an orderly manner to control the guide rails to move in opposite directions, so that the elevator track tightens and narrows, so that the resistance of the elevator car increases and eventually stops at a certain point on the guide rail; The method of controlling the elevator guide rail to tilt so that the width of the third track of the elevator rail is proportional to the vertical distance between the elevator rail and the ground includes: when a danger signal is triggered, the hydraulic cylinders installed on both sides of the guide rail extend in an orderly manner under the control of the hydraulic circuit, first gradually pushing the guide rail out in parallel, so that the car decelerates to a predetermined value within a set braking stroke, and then controlling the hydraulic circuit to drive the hydraulic cylinders in an orderly manner to change the guide rail into an elevator track that is wider at the top and narrower at the bottom.

2. The elevator emergency braking method according to claim 1, characterized in that, The hydraulic rod in the control hydraulic cylinder extends to the first position, and the hydraulic cylinder remains pressurized, thereby tightening the elevator track, including: The hydraulic circuit is activated based on the elevator car position, car weight, and the danger signal. The hydraulic circuit is driven to control the hydraulic rod in the hydraulic cylinder to extend to the first position and trigger a displacement signal; The displacement signal controls the hydraulic circuit to form a self-locking circuit, which keeps the hydraulic cylinder pressurized, thereby tightening the elevator track.

3. The elevator emergency braking method according to claim 2, characterized in that, The step of controlling the hydraulic circuit to form a self-locking circuit based on the displacement signal, and using the self-locking circuit to keep the hydraulic cylinder pressurized, thereby tightening the elevator track, includes: The electromagnetic check valve connected in series with the hydraulic cylinder is closed according to the displacement signal, so that the hydraulic cylinder stops supplying oil and enters the pressure relief cycle state.

4. The elevator emergency braking method according to claim 1, characterized in that, The step of inflating the expansion device according to the danger signal to push out the elevator guide rail close to the expansion device, thereby tightening the elevator rail, includes: According to the danger signal, high-pressure gas is released in the expansion device, and the high-pressure gas pushes the push rod piston of the expansion device. The elevator guide rail is pushed out by the push rod piston; The pawls installed on the elevator shaft wall engage with the ratchet strips installed on the outer surface of the expansion device to fix the push rod piston.

5. An elevator emergency braking system, said elevator emergency braking system being controlled by an elevator emergency braking method according to claim 1, characterized in that, include: The sensor unit is used to acquire the elevator car's running speed, car position, and car weight. The signal processing unit is used to obtain a preset safe speed threshold, determine that the elevator car's running speed exceeds the safe speed threshold, and trigger a danger signal. The elevator braking unit is used to obtain the position and weight of the elevator car, and control the elevator guide rail to perform actions in conjunction with the danger signal, so that the elevator track formed between the elevator guide rails is tightened and the elevator car is braked in an emergency. The elevator braking unit includes a hydraulic module, a mechanical actuator, and an expansion device; the hydraulic module is evenly distributed along the elevator guide rail, and the expansion device is located at the bottom of the elevator guide rail; The hydraulic module is used to control the hydraulic rod in the hydraulic cylinder to extend to the first position and to keep the hydraulic cylinder under pressure. The mechanical actuator is used to control the tightening of the elevator guide rail through the transmission of the hydraulic module; The expansion device is used to expand according to the danger signal, push out the elevator guide rail close to the expansion device, and tighten the elevator rail.

6. An elevator emergency braking system according to claim 5, wherein the hydraulic module includes a hydraulic circuit, a hydraulic cylinder, and a displacement sensor; The hydraulic circuit is used to form a self-locking circuit based on the displacement signal, and the self-locking circuit keeps the hydraulic cylinder in a pressurized state, thereby tightening the elevator track. The hydraulic cylinder is used to activate the hydraulic circuit according to the elevator car position, car weight, and the danger signal; and drive the hydraulic circuit to control the hydraulic rod in the hydraulic cylinder to extend to the first position; The displacement sensor is used to collect position information of the hydraulic rod extending from the hydraulic cylinder.

7. An elevator emergency braking system according to claim 5, wherein the outer surface of the expansion device is provided with a ratchet, and the outer surface of the elevator shaft wall is provided with a pawl; the pawl meshes with the ratchet; the expansion device is provided with a push rod piston and a reaction chamber, and the reaction chamber is filled with an explosive reaction reagent.

8. An elevator emergency braking device, characterized in that, The device includes: At least one processor; At least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor performs an elevator emergency braking method as described in any one of claims 1-4.

9. A storage medium storing a processor-executable program, characterized in that, The processor-executable program, when executed by the processor, is used to run an elevator emergency braking method as described in any one of claims 1-4.

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