Elevator falling buffering system and method

Abstract

The invention discloses an elevator falling buffering system and method, and relates to the technical field of elevator protection.The elevator falling buffering system comprises at least two hydraulic supporting rods arranged on the wall of an elevator shaft, a controller, a relay, a speed sensor and an elevator car; the real-time descending speed during descending of the elevator car is monitored through the speed sensor, and the relay is controlled to be started through the controller according to the real-time descending speed, so that the electromagnetic coil is in a power-on state; and the hydraulic supporting rods are controlled to stretch out, so that electromagnetic coils arranged on the hydraulic supporting rods are perpendicular to the wall of the elevator shaft, the descending speed of the elevator car during falling is reduced through the hydraulic supporting rod sets, and the elevator car stably falls on the hydraulic supporting rod sets. By means of the scheme, the descending speed of the elevator in the stall falling process is effectively slowed down, the situation that personal safety of people is caused by counter-acting force generated by high-speed falling of the elevator is avoided, and the personal safety of people taking the elevator is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator protection, and in particular to an elevator fall buffer system and method. Background Art

[0002] During the use of the elevator, in order to reduce casualties and property losses caused by accidental falls of the elevator, a buffer will be installed at the bottom of the elevator shaft.

[0003] Currently, buffers are mainly spring or hydraulic. If the elevator does not fall too high, these two types of buffers can provide some protection. However, if the elevator falls too high, when the elevator contacts the buffer, a very large force in the opposite direction will be generated, causing great harm to the elevator equipment and the people (objects) inside the elevator. Summary of the invention

[0004] The present invention provides an elevator fall buffer system and method, so as to reduce the downward speed of the elevator when it falls, avoid damage to the elevator equipment during an uncontrolled fall, and ensure the safety of people in the elevator car.

[0005] According to one aspect of the present invention, an elevator fall buffer system is provided, the system comprising at least two hydraulic support rods arranged on the wall of an elevator shaft, a controller, a relay, a speed sensor and an elevator car; the controller is electrically connected to the relay, the hydraulic support rod and the speed sensor respectively; each hydraulic support rod and another hydraulic support rod on the wall of the elevator shaft form a hydraulic support rod group, the hydraulic support rods in each hydraulic support rod group are arranged on both sides of the same height position of the elevator shaft wall, and the hydraulic support rods are provided with electromagnetic coils; the bottom of the elevator shaft where the elevator car is located is provided with an electromagnetic coil, and the bottom of the elevator car is provided with an electromagnetic coil;

[0006] The speed sensor is used to monitor the real-time downward speed of the elevator car when it is descending;

[0007] The controller is used to control the relay to turn on according to the real-time downward speed, so that the electromagnetic coil is in an energized state; and control the hydraulic support rod to extend, so that the electromagnetic coil set on the hydraulic support rod is perpendicular to the elevator shaft wall;

[0008] The hydraulic support rod group is used to slow down the downward speed of the elevator car when it falls, so that the elevator car lands smoothly on the hydraulic support rod group.

[0009] According to another aspect of the present invention, there is provided an elevator fall buffering method, the method comprising:

[0010] The speed sensor is used to monitor the real-time downward speed of the elevator car when it is descending;

[0011] According to the real-time downward speed, the relay is controlled to be turned on so that the electromagnetic coil is in an energized state; and the hydraulic support rod is controlled to be extended so that the electromagnetic coil arranged on the hydraulic support rod is perpendicular to the wall of the elevator shaft;

[0012] According to the electromagnetic coils arranged on the hydraulic support rods, at the bottom of the elevator shaft and at the bottom of the elevator car, the downward speed of the elevator car when falling is slowed down.

[0013] The technical solution of the embodiment of the present invention provides an elevator fall buffer system including at least two hydraulic support rods arranged on the wall of the elevator shaft, a controller, a relay, a speed sensor and an elevator car. The speed sensor monitors the real-time downward speed of the elevator car when it is descending, and the controller controls the relay to turn on according to the real-time downward speed, so that the electromagnetic coil is in an energized state; and the hydraulic support rod is controlled to extend, so that the electromagnetic coil arranged on the hydraulic support rod is perpendicular to the wall of the elevator shaft, and the hydraulic support rod group is used to slow down the downward speed of the elevator car when it falls, so that the elevator car falls smoothly on the hydraulic support rod group. Through the elevator fall buffer system, the downward speed of the elevator during the stall fall process is effectively slowed down, and the personal safety of personnel caused by the reaction force generated by the high-speed fall of the elevator is avoided, and the safety of the elevator operation is provided to ensure the personal safety of the elevator passengers.

[0014] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 these drawings without creative work.

[0016] Figure 1 2 is a schematic diagram of the structure of an elevator fall buffer system provided according to Embodiment 1 of the present invention;

[0017] Figure 2 is a structural schematic diagram of an elevator car provided according to Embodiment 2 of the present invention;

[0018] Figure 3 It is a flow chart of an elevator fall buffering method provided according to Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] Embodiment 1

[0022] Figure 1 The present invention provides a schematic diagram of the structure of an elevator fall buffer system. This embodiment is applicable to the case where the elevator stalls and falls. Figure 1 As shown, the elevator fall buffer system may include at least two hydraulic support rods 101, a controller 102, a relay 103, a speed sensor 104 and an elevator car; the controller 102 may be electrically connected to the relay 103, the hydraulic support rod 101 and the speed sensor 104 respectively; and electromagnetic coils 105 are provided on the hydraulic support rod 101, at the bottom of the elevator shaft where the elevator car is located, and at the bottom of the elevator car.

[0023] On the wall of the elevator shaft where the elevator car is located, a group of hydraulic support rods can be arranged at intervals of a preset distance, and each hydraulic support rod group includes two hydraulic support rods 101, and the two hydraulic support rods 101 are arranged on both sides of the same height position of the elevator shaft wall, that is, each hydraulic support rod 101 and another hydraulic support rod on the elevator shaft wall form a hydraulic support rod group. Optionally, the preset distance can be adaptively set according to those skilled in the art.

[0024] The speed sensor 104 can be used to monitor the real-time downward speed of the elevator car during the stalling and falling downward process. Optionally, the setting position of the speed sensor 104 can be adapted according to those skilled in the art, for example, it can be set at the bottom of the elevator shaft or the bottom of the elevator car.

[0025] The controller 102 can be used to control the relay 103 to turn on according to the real-time downward speed of the elevator car, so that the electromagnetic coil 105 is in an energized state; and control the hydraulic support rod 101 to extend, so that the electromagnetic coil 105 set on the hydraulic support rod 101 is perpendicular to the wall of the elevator shaft. Optionally, the elevator fall buffer system also includes a storage power supply, which can be set at the bottom of the elevator shaft to energize the electromagnetic coil 105 through the relay 103.

[0026] The hydraulic support rod group can be used to slow down the downward speed of the elevator car when it falls. With the support force provided by the hydraulic support rod 101 and the elevator shaft wall, the elevator car can land smoothly on the hydraulic support rod group.

[0027] In the embodiment of the present invention, the speed sensor 104 can monitor the running speed of the elevator car in real time. In the case of a failure, stall and fall of the elevator car, if the real-time downward speed of the elevator car exceeds the preset safety speed threshold, the controller 102 can control all the hydraulic support rods 101 embedded in the wall of the elevator shaft to extend so that the electromagnetic coil 105 set on the hydraulic support rod 101 is perpendicular to the wall of the elevator shaft. When the elevator car descends to the preset judgment distance threshold above the hydraulic support rod group, if the real-time downward speed of the elevator car exceeds the preset stoppable speed threshold, it indicates that the elevator car cannot safely land on the hydraulic support rod group. In order not to affect the downward movement of the elevator car, the controller 102 can control the hydraulic support rod group to retract so that the hydraulic support rod group is restored from the extended state to the state embedded in the wall of the elevator shaft. When the elevator car descends to the preset judgment distance threshold above the hydraulic support rod group, if the real-time downward speed of the elevator car does not exceed the preset stoppable speed threshold, the controller 102 can control the elevator car to land smoothly on the plane formed by the hydraulic support rod group. It should be noted that the stop speed threshold may refer to the safe distance at which the elevator car can safely fall onto the hydraulic support rod group when the elevator car descends to the distance threshold of the hydraulic support rod group below. Optionally, the distance threshold and the stop speed threshold may be adaptively set according to those skilled in the art.

[0028] It should be noted that in the embodiment of the present invention, the controller 102 independently controls the control mode of at least one group of hydraulic support rods in the elevator shaft, that is, each hydraulic support rod group has its corresponding control signal. By adopting the independent control mode, the extension state and retraction state of the hydraulic support rod group can be flexibly controlled, so as to facilitate buffering and deceleration of the elevator car that stalls and falls first.

[0029] Optionally, the distance between the elevator car and the hydraulic support rod group is determined by a distance sensor arranged on the hydraulic support rod 101, and each hydraulic support rod group can be provided with a corresponding distance sensor.

[0030] Optionally, the relay 103 may include a first relay 103 and a second relay 103, wherein the first relay 103 may be disposed at the bottom of the elevator car to control the power-on state of the electromagnetic coil 105 disposed at the bottom of the elevator car; and the second relay 103 may be disposed at the bottom of the elevator shaft to control the power-on state of the electromagnetic coil 105 disposed on the hydraulic support rod 101. It should be noted that, in the power-on state, the current direction of the electromagnetic coil 105 disposed at the bottom of the elevator car is opposite to the current direction of the electromagnetic coil 105 disposed at the bottom of the elevator shaft and on the hydraulic support rod 101, and in order to ensure that the electromagnetic force generated by the electromagnetic coil 105 is large enough, a magnetic core is disposed in the electromagnetic coil 105.

[0031] In the embodiment of the present invention, if the real-time downward speed exceeds the preset safety speed threshold, the controller 102 can control the first relay 103 to turn on, so that the electromagnetic coil 105 set at the bottom of the elevator car is in an energized state; and the controller 102 controls the second relay 103 to turn on, so that the electromagnetic coils 105 set on all hydraulic support rods 101 in the elevator shaft are in an energized state; at this time, the electromagnetic coils 105 set at the bottom of the elevator shaft and on the hydraulic support rods 101 will provide an upward repulsive force to the electromagnetic coils 105 set at the bottom of the elevator shaft, thereby slowing down the speed of the elevator car falling. When the elevator car descends to the preset judgment distance threshold above the hydraulic support rod group, if the real-time downward speed of the elevator car exceeds the preset stoppable speed threshold, the controller 102 can control the second relay 103 to make the electromagnetic coils 105 set in the hydraulic support rod group in an energized state.

[0032] By providing at least one group of hydraulic support rods 101 and independently controlling each group of hydraulic support rods, as well as flexibly controlling the power-on state of the electromagnetic coil 105, it is ensured that the elevator will not fall rapidly during the elevator stalling and falling process, thereby slowing down the elevator's downward speed.

[0033] Optionally, in an embodiment of the present invention, after the elevator car lands smoothly on the hydraulic support rod group, the controller 102 can control the hydraulic support rod group to retract, and control the second relay 103 to make the electromagnetic coil 105 provided in the hydraulic support rod group in a power-off state. At this time, the controller 102 controls the current output by the power supply, changes the electromagnetic force generated by the electromagnetic coil 105 which is still in the power-on state, and makes the electromagnetic coil slowly descend until it lands safely at the bottom of the elevator shaft. It should be noted that the current of the electromagnetic coil 105 in the power-on state is determined according to the real-time downward speed of the elevator car and the weight of the elevator car.

[0034] The technical solution of the embodiment of the present invention provides an elevator fall buffer system including at least two hydraulic support rods 101 arranged on the wall of the elevator shaft, a controller 102, a relay 103, a speed sensor 104 and an elevator car. The speed sensor 104 monitors the real-time downward speed of the elevator car when it is descending, and the controller 102 controls the relay 103 to turn on according to the real-time downward speed, so that the electromagnetic coil 105 is in an energized state; and the hydraulic support rod 101 is controlled to extend so that the electromagnetic coil 105 arranged on the hydraulic support rod 101 is perpendicular to the wall of the elevator shaft, and the hydraulic support rod group slows down the downward speed of the elevator car when it falls, so that the elevator car falls smoothly on the hydraulic support rod group. Through the elevator fall buffer system, the downward speed of the elevator during the stall fall process is effectively slowed down, and the reaction force generated by the high-speed fall of the elevator is avoided to cause personal safety to personnel, which provides safety protection for the operation of the elevator to ensure the personal safety of the passengers in the elevator.

[0035] Embodiment 2

[0036] Figure 2 This is a schematic diagram of the structure of an elevator car provided in the second embodiment of the present invention. This embodiment further describes the structure of the elevator car based on the above embodiment. It should be noted that for the undetailed parts of the embodiment of the present invention, reference can be made to the relevant descriptions of other embodiments, which will not be repeated here. Figure 2 As shown, the external structure of the elevator car includes a heat insulation layer, a liquid nitrogen layer, a superconductor layer, a liquid nitrogen layer and a heat insulation layer from the inside to the outside, and each heat insulation layer is correspondingly configured with a liquid nitrogen compression device; the liquid nitrogen compression device can be electrically connected to the controller 102, and the controller 102 can be used to start the liquid nitrogen compression device to release liquid nitrogen to the liquid nitrogen layer according to the real-time downward speed of the elevator car.

[0037] In the embodiment of the present invention, in order to ensure that the elevator can safely decelerate and land during the stalling and falling process, the required electromagnetic field is very strong, and a strong electromagnetic field will cause harm to passengers and objects inside the elevator. For example, if a person inside the elevator holds a purchased fruit knife or other metal object that is easily affected by the magnetic field, the strong attraction of the electromagnetic field to the knife is a very large safety hazard in the presence of an electromagnetic field. Therefore, when using the electromagnetic field mutual repulsion principle to perform stall buffering on a stalling and falling elevator, it is necessary to ensure that the electromagnetic field will not have a harmful effect on the interior of the elevator car.

[0038] The superconductor layer can be made of superconductor materials. When the superconducting material reaches its superconducting transition temperature, its resistance suddenly drops to zero and it can completely repel the external magnetic field. Therefore, the superconducting material can provide a very effective magnetic shielding effect.

[0039] Since superconductor materials need to be below their critical temperature to work effectively. In order to enable superconductor materials to work, we can add a liquid nitrogen layer (or liquid helium layer) on both sides of the superconductor sheath. Usually, liquid nitrogen is installed in the interlayer through a liquid nitrogen compression device. When necessary, the controller 102 can control the valve of the liquid nitrogen compression device to open and release the liquid nitrogen, thereby reducing the temperature of the superconductor material to below the critical value. It should be noted that when the real-time downward speed of the elevator car exceeds the preset safety speed threshold, the controller 102 can control the valve of the liquid nitrogen compression device to open.

[0040] In the embodiment of the present invention, since the liquid nitrogen vaporizes not only lowers the temperature of the superconductor, but also rapidly lowers the temperature of the surrounding objects, in order to protect the liquid nitrogen from affecting the surrounding objects, a thermal insulation layer is wrapped outside the liquid nitrogen layer, so that the surrounding people and objects can be prevented from being affected by the low temperature. The thermal insulation layer material ensures that the cooling effect of the liquid nitrogen only acts on the superconductor, accelerating the temperature reduction of the superconductor.

[0041] The technical solution of the embodiment of the present invention, by designing an elevator car that generates a magnetic shielding space in a strong magnetic field environment, is achieved in a strong magnetic field environment, where the electromagnetic field cannot cause harm to passengers in the elevator car or affect metal objects in the elevator car, thereby further ensuring the personal safety of passengers.

[0042] Embodiment 3

[0043] Figure 3 This is a flow chart of an elevator fall buffer method provided in Embodiment 3 of the present invention. The elevator fall buffer method can be applied to an elevator fall buffer system including at least two hydraulic support rods 101 arranged on the wall of an elevator shaft, a controller 102, a relay 103, a speed sensor 104 and an elevator car. Figure 3 As shown, the method includes:

[0044] S310, monitoring the real-time downward speed of the elevator car through the speed sensor 104.

[0045] S320. According to the real-time downward speed, control the relay 103 to turn on so that the electromagnetic coil 105 is energized; and control the hydraulic support rod 101 to extend so that the electromagnetic coil 105 provided on the hydraulic support rod 101 is perpendicular to the wall of the elevator shaft.

[0046] S330, according to the electromagnetic coil 105 arranged on the hydraulic support rod 101, the bottom of the elevator shaft and the bottom of the elevator car, the downward speed of the elevator car when falling is slowed down.

[0047] Optionally, the controller 102 is specifically configured to:

[0048] When the real-time downward speed exceeds the preset safety speed threshold, all hydraulic support rods 101 embedded in the elevator shaft wall are controlled to extend so that the electromagnetic coils 105 arranged on the hydraulic support rods 101 are perpendicular to the elevator shaft wall;

[0049] When the elevator car is at a preset determination distance threshold above the hydraulic support rod group, if the real-time downward speed exceeds a preset stoppable speed threshold, the hydraulic support rod group is controlled to be retracted so that the hydraulic support rod group is restored from an extended state to a state embedded in the elevator shaft wall;

[0050] When the elevator car is at a preset judgment distance threshold above the hydraulic support rod group, if the real-time downward speed does not exceed the preset stoppable speed threshold, the elevator car is controlled to land smoothly on the plane formed by the hydraulic support rod group.

[0051] Optionally, the distance between the elevator car and the hydraulic support rod group is determined by a distance sensor arranged on the hydraulic support rod 101.

[0052] Optionally, the controller 102 independently controls at least one group of hydraulic support rods in the elevator shaft, and each hydraulic support rod group has its corresponding control signal.

[0053] Optionally, the relay 103 includes a first relay 103 and a second relay 103, the first relay 103 is arranged at the bottom of the elevator car, and is used to control the power-on state of the electromagnetic coil 105 arranged at the bottom of the elevator car; the second relay 103 is arranged at the bottom of the elevator shaft, and is used to respectively control the power-on state of the electromagnetic coil 105 arranged on each hydraulic support rod 101.

[0054] Optionally, the controller 102 is further specifically configured to:

[0055] When the real-time downward speed exceeds the preset safety speed threshold, the first relay 103 is controlled to be turned on, so that the electromagnetic coil 105 provided at the bottom of the elevator car is in a powered state; and the second relay 103 is controlled to be turned on, so that the electromagnetic coils 105 provided on all the hydraulic support rods 101 in the elevator shaft are in a powered state;

[0056] When the elevator car is at a preset determination distance threshold above the hydraulic support rod group, if the real-time downward speed exceeds the preset stoppable speed threshold, the second relay 103 is controlled to put the electromagnetic coil 105 provided in the hydraulic support rod group in a power-off state.

[0057] Optionally, a magnetic core is provided in the electromagnetic coil 105; the current direction of the electromagnetic coil 105 arranged at the bottom of the elevator car when powered on is opposite to the current direction of the electromagnetic coil 105 arranged at the bottom of the elevator shaft and on the hydraulic support rod 101 when powered on.

[0058] Optionally, the current magnitude of the electromagnetic coil 105 when it is powered on is determined according to the real-time downward speed of the elevator car.

[0059] Optionally, the external structure of the elevator car includes, from the inside to the outside, a thermal insulation layer, a liquid nitrogen layer, a superconductor layer, a liquid nitrogen layer and a thermal insulation layer, and each thermal insulation layer is correspondingly configured with a liquid nitrogen compression device; the liquid nitrogen compression device is electrically connected to the controller 102, and the controller 102 is used to start the liquid nitrogen compression device to release liquid nitrogen to the liquid nitrogen layer according to the real-time downward speed.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0061] The technical solution of the embodiment of the present invention provides an elevator fall buffer system including at least two hydraulic support rods 101 arranged on the wall of the elevator shaft, a controller 102, a relay 103, a speed sensor 104 and an elevator car. The speed sensor 104 monitors the real-time downward speed of the elevator car when it is descending, and the controller 102 controls the relay 103 to turn on according to the real-time downward speed, so that the electromagnetic coil 105 is in an energized state; and the hydraulic support rod 101 is controlled to extend so that the electromagnetic coil 105 arranged on the hydraulic support rod 101 is perpendicular to the wall of the elevator shaft, and the hydraulic support rod group slows down the downward speed of the elevator car when it falls, so that the elevator car falls smoothly on the hydraulic support rod group. Through the elevator fall buffer system, the downward speed of the elevator during the stall fall process can be effectively slowed down, and the personal safety of personnel caused by the reaction force generated by the high-speed fall of the elevator can be avoided, which provides safety protection for the operation of the elevator to ensure the personal safety of the passengers in the elevator.

[0062] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator fall buffer system, characterized in that: The invention comprises at least two hydraulic support rods arranged on the wall of the elevator shaft, a controller, a relay, a speed sensor and an elevator car; the controller is electrically connected to the relay, the hydraulic support rod and the speed sensor respectively; each hydraulic support rod and another hydraulic support rod on the wall of the elevator shaft form a hydraulic support rod group, the hydraulic support rods in each hydraulic support rod group are arranged on both sides of the same height position of the elevator shaft wall, and the hydraulic support rods are provided with electromagnetic coils; the bottom of the elevator shaft where the elevator car is located is provided with an electromagnetic coil, and the bottom of the elevator car is provided with an electromagnetic coil; The speed sensor is used to monitor the real-time downward speed of the elevator car when it is descending; The controller is used to control the relay to turn on according to the real-time downward speed, so that the electromagnetic coil is in an energized state; and control the hydraulic support rod to extend, so that the electromagnetic coil set on the hydraulic support rod is perpendicular to the elevator shaft wall; The hydraulic support rod group is used to slow down the downward speed of the elevator car when it falls, so that the elevator car lands smoothly on the hydraulic support rod group.

2. The elevator fall buffer system according to claim 1, characterized in that: The controller is specifically used for: When the real-time downward speed exceeds a preset safety speed threshold, all hydraulic support rods embedded in the elevator shaft wall are controlled to extend so that the electromagnetic coils arranged on the hydraulic support rods are perpendicular to the elevator shaft wall; When the elevator car is at a preset determination distance threshold above the hydraulic support rod group, if the real-time downward speed exceeds a preset stoppable speed threshold, the hydraulic support rod group is controlled to be retracted so that the hydraulic support rod group is restored from an extended state to a state embedded in the elevator shaft wall; When the elevator car is at a preset judgment distance threshold above the hydraulic support rod group, if the real-time downward speed does not exceed the preset stoppable speed threshold, the elevator car is controlled to land smoothly on the plane formed by the hydraulic support rod group.

3. The elevator fall buffer system according to claim 2, characterized in that: The distance between the elevator car and the hydraulic support rod set is determined by a distance sensor arranged on the hydraulic support rod.

4. The elevator fall buffer system according to claim 1, characterized in that: The controller independently controls at least one group of hydraulic support rods in the elevator shaft, and each hydraulic support rod group has its corresponding control signal.

5. The system according to claim 1, characterized in that The relay includes a first relay and a second relay. The first relay is arranged at the bottom of the elevator car and is used to control the power-on state of the electromagnetic coil arranged at the bottom of the elevator car; the second relay is arranged at the bottom of the elevator shaft and is used to respectively control the power-on state of the electromagnetic coils arranged on each hydraulic support rod.

6. The elevator fall buffer system according to claim 5, characterized in that: The controller is also specifically used for: When the real-time downward speed exceeds the preset safety speed threshold, the first relay is controlled to be turned on so that the electromagnetic coil arranged at the bottom of the elevator car is in an energized state; and the second relay is controlled to be turned on so that the electromagnetic coils arranged on all the hydraulic support rods in the elevator shaft are in an energized state; When the elevator car is at a preset determination distance threshold above the hydraulic support rod group, if the real-time downward speed exceeds a preset stoppable speed threshold, the second relay is controlled to put the electromagnetic coil provided in the hydraulic support rod group in a power-off state.

7. The elevator fall buffer system according to claim 1, characterized in that: A magnetic core is arranged in the electromagnetic coil; the current direction of the electromagnetic coil arranged at the bottom of the elevator car when powered on is opposite to the current direction of the electromagnetic coil arranged at the bottom of the elevator shaft and on the hydraulic support rod when powered on.

8. The elevator fall buffer system according to claim 7, characterized in that: The current magnitude of the electromagnetic coil when it is powered on is determined according to the real-time downward speed of the elevator car.

9. The elevator fall buffer system according to claim 1, characterized in that: The external structure of the elevator car includes, from inside to outside, a heat insulation layer, a liquid nitrogen layer, a superconductor layer, a liquid nitrogen layer and a heat insulation layer, and each heat insulation layer is correspondingly provided with a liquid nitrogen compression device; The liquid nitrogen compression device is electrically connected to the controller, and the controller is used to start the liquid nitrogen compression device to release liquid nitrogen to the liquid nitrogen layer according to the real-time downward speed.

10. An elevator fall buffer method, characterized in that: The elevator fall buffer system applied to any one of claims 1 to 9, the system comprising at least two hydraulic support rods arranged on the wall of the elevator shaft, a controller, a relay, a speed sensor and an elevator car; the controller is electrically connected to the relay, the hydraulic support rod and the speed sensor respectively; each hydraulic support rod and another hydraulic support rod on the wall of the elevator shaft form a hydraulic support rod group, the hydraulic support rods in each hydraulic support rod group are arranged on both sides of the same height position of the elevator shaft wall, and the hydraulic support rods are provided with electromagnetic coils; the bottom of the elevator shaft where the elevator car is located is provided with an electromagnetic coil, and the bottom of the elevator car is provided with an electromagnetic coil; the method comprises: The speed sensor is used to monitor the real-time downward speed of the elevator car when it is descending; According to the real-time downward speed, the relay is controlled to be turned on so that the electromagnetic coil is in an energized state; and the hydraulic support rod is controlled to be extended so that the electromagnetic coil arranged on the hydraulic support rod is perpendicular to the wall of the elevator shaft; According to the electromagnetic coils arranged on the hydraulic support rods, at the bottom of the elevator shaft and at the bottom of the elevator car, the downward speed of the elevator car when falling is slowed down.

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