Airbag pre-crash active safety elevator car

Abstract

The application provides an air bag pre-crash active safety elevator car, which comprises a side wall, a top plate and a bottom plate, and an elevator control system, and the central region of the bottom plate is provided with an air bag device, which comprises a bag body and a compressed gas tank; a plurality of lancets are arranged around the air bag device, the needle head of each lancet is placed downward and is inclined to the central region of the bottom of the bottom plate; and the edge of the bottom plate is provided with an air cushion device, which comprises a hollow cushion body and a compressed gas cylinder. According to the scheme, the bag body is inflated to perform buffering, in the process of contacting the ground, the bag body is deformed due to the extrusion of the elevator car, expands to the surrounding, is punctured by the lancets after fully contacting the lancets, and the rebound of the bag body is prevented, so that the elevator car is bounced up, the effect of buffering and decelerating the elevator car and preventing the rebound of the elevator car is achieved, and then the inflated cushion body supports the elevator car, so that the safety hidden danger that the hydraulic rod is pressed and broken due to insufficient rigidity and cannot perform buffering or the safety hidden danger that the passenger is injured due to the puncture of the bottom plate of the elevator car is eliminated, and the safety of the passenger is ensured.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to an elevator car and control method. Background Technology

[0002] In elevator safety equipment, the buffer device located at the bottom of the elevator car typically uses springs for cushioning. The springs' resistance to compression and their elasticity reduce the falling speed to ensure passenger safety. However, after deceleration using the springs, their resilience can cause the elevator car to bounce back, potentially causing secondary injuries to passengers. To address this issue, existing technologies often incorporate hydraulic rods to stabilize the springs and prevent them from bouncing the elevator car. However, in practical use, hydraulic rods present certain risks. If the elevator descends too quickly, causing the pressure to exceed the hydraulic rod's supporting capacity, it can break. If high-strength hydraulic rods are used, they may pierce the floor after the elevator car falls, injuring passengers. Therefore, current technology cannot eliminate this risk and guarantee passenger safety. Summary of the Invention

[0003] One objective of this application is to provide an airbag pre-collision active safety elevator car to solve at least one of the above-mentioned technical problems.

[0004] This application provides an airbag pre-collision active safety elevator car, including side walls, a top plate and a bottom plate, as well as an elevator control system;

[0005] An airbag device is provided at the bottom of the base plate. The airbag device is located in the central area of ​​the bottom of the base plate. The airbag device includes a downward-facing airbag body and a compressed air tank. The air outlet of the compressed air tank is connected to the air inlet of the airbag body. An electronic valve is provided at the air outlet of the compressed air tank. The signal input terminal of the electronic valve is communicatively connected to the signal output terminal of the elevator control system.

[0006] The airbag device is surrounded by needles with the needle tips facing downwards and tilted towards the center of the bottom of the base plate. When the airbag is an inflated spherical structure, the distance between the needle tip and the inflated airbag is 1.2 to 1.5 times the radius of the airbag. When the airbag is squeezed by the elevator car and the ground, the airbag expands and deforms outwards with the degree of compression until the needle punctures the airbag and the air inside the airbag is released.

[0007] An air cushion device is provided on the edge of the base plate. The air cushion device has an inflatable hollow cushion body placed downwards and a compressed air cylinder. The air outlet of the compressed air cylinder is connected to the air inlet of the cushion body. An electronic air valve is provided at the air outlet of the compressed air cylinder. The signal input terminal of the electronic air valve is communicatively connected to the signal output terminal of the elevator control system.

[0008] The base plate includes a load-bearing area for supporting heavy objects, and slots located on the outside of the load-bearing area;

[0009] The two side walls adjacent to the elevator door are equipped with plugs that mate with slots. The plugs are inserted into the slots for connection and fixation.

[0010] The plug has a protrusion extending toward the bearing area, and the slot has a recess that adapts to the protrusion;

[0011] The base plate also includes a support mechanism located on the outside of the slot;

[0012] The support mechanism is an upward-standing support plate;

[0013] The support plate is a metal plate that forms the base plate; it is an upwardly bent metal component.

[0014] The side of the support plate furthest from the load-bearing area is perpendicular to the load-bearing surface of the load-bearing area.

[0015] The side of the support plate facing the load-bearing area has an obtuse angle fit with the load-bearing surface of the load-bearing area.

[0016] The two side walls adjacent to the elevator door facing the load-bearing area and the plug facing the load-bearing area are on the same plane;

[0017] The two side walls adjacent to the elevator door, facing away from the load-bearing area, protrude outwards compared to the side of the plug facing away from the load-bearing area, and have a thicker structure.

[0018] The two side walls adjacent to the elevator door gradually thicken upwards from the connection point with the plug, forming a lower surface structure that fits against the obtuse angled surface of the support plate after the plug is inserted.

[0019] Furthermore, after the plug is inserted into the slot, the inclined surface of the support plate fits and supports the lower surface structure of the two side walls adjacent to the elevator door.

[0020] Preferably, the top plate includes a decorative area for mounting equipment and a groove provided on the outer side of the decorative area;

[0021] The two side walls adjacent to the elevator door are provided with protruding tops that mate with the grooves. The protruding tops are inserted into the grooves for connection and fixation.

[0022] The top plate also includes a pressing mechanism disposed on the outside of the groove;

[0023] The pressing mechanism is a downward-standing pressing plate;

[0024] The pressure plate is a metal plate that forms the top plate; it is a metal component that bends downwards.

[0025] The side of the lower pressure plate furthest from the decorative area is perpendicular to the decorative surface of the decorative area.

[0026] The side of the lower pressure plate facing the device area has an obtuse angle fit with the decorative surface of the decorative area.

[0027] The two side walls adjacent to the elevator door facing the decorative area are on the same plane as the surface of the dome facing the decorative area.

[0028] The two side walls adjacent to the elevator door, facing away from the decorative area, protrude outwards and have a thicker structure compared to the side of the dome facing away from the decorative area.

[0029] The two side walls adjacent to the elevator door gradually thicken downwards from the connection point with the convex top, forming an upper surface structure that fits against the obtuse angle of the surface on the lower pressure plate after being inserted into the convex top.

[0030] Furthermore, after the convex top is inserted into the groove, the inclined surface of the lower pressure plate is pressed against the upper surface structure of the two side walls adjacent to the elevator door.

[0031] Preferably, the needle is at an angle of 40 to 50 degrees to the surface of the base plate.

[0032] Preferably, the car is also equipped with an electronic air pump and an energy storage battery. The energy storage battery is placed inside the side wall. The power output terminal of the energy storage battery is connected to the power input terminal of the electronic air pump. The signal input terminal of the electronic air pump is connected to the signal output terminal of the elevator control system. The air outlet of the electronic air pump is connected to the air inlet of the bag and the air inlet of the cushion respectively.

[0033] Preferably, the side of the car is provided with an extendable balance support, the balance support including a connecting rod and an electro-hydraulic control rod;

[0034] One end of the connecting rod is connected to the side wall of the elevator car, and the other end is connected to a contact mechanism;

[0035] One end of the electro-hydraulic control rod is movably connected to the side wall of the elevator car via a rotating shaft, and the other end is movably connected to the rod surface of the connecting rod. The signal input end of the electro-hydraulic control rod is connected to the signal output end of the elevator control system.

[0036] Preferably, the contact mechanism includes:

[0037] Roller or friction block;

[0038] The surface of the friction block that contacts the elevator shaft wall is curved.

[0039] Preferably, the side wall of the car is provided with an upward-extending ladder, and the top plate is provided with an escape passage corresponding to the ladder.

[0040] Preferably, the elevator control system has a microprocessor system;

[0041] The microprocessor system is connected to a distance sensor located at the bottom of the elevator car;

[0042] The microprocessor system calculates the elevator's descent speed based on changes in time and the values ​​from the ranging sensor.

[0043] The microprocessor system continuously acquires multiple elevator height data values ​​through a distance sensor placed at the bottom of the elevator car, and confirms that the elevator is moving downward based on the multiple elevator height data values ​​that change over time.

[0044] Determine whether the elevator's descent speed exceeds a preset speed alarm threshold;

[0045] If the speed alarm threshold is exceeded, the estimated time for the elevator to fall to the ground is obtained based on the elevator height data and time data, and compared with the preset time for the safe ejection of the capsule.

[0046] When it is confirmed that the difference between the elevator's falling time and the capsule's ejection time is less than 0.3 seconds, a valve opening control command is sent to the electronic valve to make the compressed air tank and the capsule air-connected.

[0047] Send a control command to the electronic air valve to open the air valve, so that the compressed air cylinder is connected to the air cushion air.

[0048] Furthermore, after determining whether the elevator's descent speed exceeds a preset speed alarm threshold, the process also includes:

[0049] If the speed alarm threshold is exceeded, a control command to deploy the balance support is sent to make the balance support contact the elevator shaft wall.

[0050] Furthermore, after sending the valve opening control command to the electronic valve, the process also includes:

[0051] A start control command is sent to the electronic air pump to continuously inflate the bladder and cushion.

[0052] Compared with the prior art, this application provides an airbag pre-collision active safety elevator car, including side walls, a top plate, and a bottom plate, as well as an elevator control system. An airbag device is provided at the bottom of the bottom plate, positioned in the central area of ​​the bottom of the bottom plate. The airbag device includes a downward-facing airbag body and a compressed air tank. The outlet of the compressed air tank is connected to the inlet of the airbag body. An electronic valve is provided at the outlet of the compressed air tank, and the signal input terminal of the electronic valve is communicatively connected to the signal output terminal of the elevator control system. Spikes are arranged around the airbag device, with the needle tips facing downwards and towards the central area of ​​the bottom of the bottom plate. When the airbag is tilted and expands into a spherical structure, the distance between the tip of the needle and the expanded airbag is 1.2 to 1.5 times the radius of the airbag. When the airbag is compressed by the elevator car and the ground, the airbag expands and deforms outwards with the degree of compression until the needle punctures the airbag, and the air inside the airbag is released. The bursting of the airbag is controlled by the needle to release the gas and avoid uncontrollable bursting. An air cushion device is provided on the edge of the base plate. The air cushion device has an inflatable hollow cushion placed downwards and a compressed air cylinder. The outlet of the compressed air cylinder is connected to the inlet of the cushion. The air inlet is equipped with an electronic air valve, the signal input terminal of which is communicatively connected to the signal output terminal of the elevator control system; the base plate includes a load-bearing area for supporting heavy objects and a slot located outside the load-bearing area; plugs that mate with the slots are located below the two side walls adjacent to the elevator door, and the plugs are inserted into the slots for connection and fixation; the plugs have protrusions extending towards the load-bearing area, and the slots have recesses that correspond to the protrusions; the base plate also includes a support mechanism located outside the slots; the support mechanism is an upwardly erected support plate; the support plate is a metal plate forming the base plate, an upwardly bent metal component; the side of the support plate away from the load-bearing area is connected to the load-bearing area... The cross-section is perpendicular; the side of the support plate facing the load-bearing area has an obtuse angle fit with the load-bearing surface of the load-bearing area; the two side walls adjacent to the elevator door facing the load-bearing area and the plug facing the load-bearing area are on the same plane; the two side walls adjacent to the elevator door facing away from the load-bearing area protrude outwards compared to the plug facing away from the load-bearing area, and have a thicker structure; the two side walls adjacent to the elevator door gradually thicken from the bottom where they connect with the plug upwards, forming a lower surface structure that fits with the obtuse angle surface on the support plate after the plug is inserted; furthermore, after the plug is inserted into the slot, the inclined surface of the support plate fits and supports the lower surface structure of the two side walls adjacent to the elevator door.This design uses an inflatable bladder for cushioning. Upon contact with the ground, the bladder deforms under the pressure of the elevator car, expanding outwards until it comes into full contact with a needle, at which point it is punctured. This prevents the bladder from rebounding and causing the elevator car to bounce, thus achieving the effect of cushioning and decelerating the elevator car and preventing it from rebounding. The bursting of the bladder is controlled by the needle, allowing the gas to escape and avoiding an uncontrollable explosion. The inflatable cushion then serves as a support for the elevator car. This eliminates the safety hazards of insufficient rigidity of the hydraulic rod, which may break under pressure and fail to provide cushioning, or puncture the elevator car floor and injure passengers. The two side walls adjacent to the floor and elevator door use a one-piece molded splicing structure, which is more stable and has better compressive strength than the connection method using connectors, ensuring passenger safety. Attached Figure Description

[0053] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0054] Figure 1 This is a schematic diagram of one embodiment of the airbag pre-collision active safety elevator car described in this application;

[0055] Figure 2 This is a side view of one embodiment of the airbag pre-collision active safety elevator car described in this application;

[0056] Figure 3 This is a bottom view of one embodiment of the airbag pre-collision active safety elevator car described in this application;

[0057] Figure 4 This is a schematic diagram of one embodiment of the airbag pre-collision active safety elevator car structure described in this application;

[0058] Figure 5 This is a flowchart of one embodiment of the airbag pre-collision active safety elevator car described in this application;

[0059] The same or similar reference numerals in the accompanying drawings represent the same or similar parts. Detailed Implementation

[0060] The following is combined Figures 1 to 4 This application further elaborates on the airbag pre-collision active safety elevator car.

[0061] This application provides an airbag pre-collision active safety elevator car, including a side wall 1, a top plate 3 and a bottom plate 2, as well as an elevator control system;

[0062] An airbag device 21 is provided at the bottom of the base plate 2. The airbag device 21 is located in the central area of ​​the bottom of the base plate 2. The airbag device 21 includes a downward-facing bladder and a compressed air tank. The air outlet of the compressed air tank is connected to the air inlet of the bladder. An electronic valve is provided at the air outlet of the compressed air tank. The signal input terminal of the electronic valve is communicatively connected to the signal output terminal of the elevator control system.

[0063] The airbag device 21 is surrounded by needles 23, with the needle tips of the needles 23 facing downwards and inclined towards the center area of ​​the bottom of the base plate 2. When the airbag is an inflated spherical structure, the distance between the needle tip and the inflated airbag is 1.2 to 1.5 times the radius of the airbag. When the airbag is squeezed by the elevator car and the ground, the airbag expands and deforms outwards with the degree of compression until the needle punctures the airbag and the air inside the airbag is released.

[0064] An air cushion device 22 is provided on the edge of the base plate 2. The air cushion device 22 has an inflatable hollow cushion body placed downwards and a compressed air cylinder. The air outlet of the compressed air cylinder is connected to the air inlet of the cushion body. An electronic air valve is provided at the air outlet of the compressed air cylinder. The signal input terminal of the electronic air valve is communicatively connected to the signal output terminal of the elevator control system.

[0065] The airbag device 21 is used to cushion the elevator car when it falls to the ground. It consists of a hollow airbag and a compressed air tank. When the gas in the compressed air tank is released, it rapidly inflates the airbag. Needles 23 are arranged around the airbag device 21 to puncture the airbag. After inflation, the airbag absorbs the downward pressure of the falling elevator car to support it. During the cushioning process, the airbag expands outward due to compression. The distance between the tip of the needle and the airbag is 1 / 3 of the radius of the airbag. The gas pressure is 0.2 to 1.5 times, preferably 1.3 times. When the pressure is extended to the needle 23 and fully contacts it, the gas is punctured by the needle 23. The gas is released due to the puncture of the bladder, preventing the bladder from rebounding. Thus, the bursting of the air bladder is controlled by the needle, allowing the gas to escape and avoiding uncontrollable bursting. The base plate includes a load-bearing area for supporting heavy objects and a slot located on the outside of the load-bearing area. Plugs 13 that mate with the slots are provided below the two side walls adjacent to the elevator door. The plugs 13 are inserted into the slots for connection and fixation. The plugs 13 are designed to... The base plate includes a protrusion 131 extending towards the bearing area, and the slot has a recess adapted to the protrusion 131. The base plate also includes a support mechanism disposed outside the slot. The support mechanism is an upwardly erected support plate. The support plate is a metal plate forming the base plate, and is an upwardly bent metal component. The side of the support plate away from the bearing area is perpendicular to the bearing surface of the bearing area. The side of the support plate facing the bearing area has an obtuse angle fit structure with the bearing surface of the bearing area. The two side walls adjacent to the elevator door facing the bearing area are on the same plane as the side of the plug 13 facing the bearing area. The two side walls adjacent to the elevator door facing away from the bearing area protrude outward compared to the side of the plug 13 facing away from the bearing area, and have a thicker structure. The two side walls adjacent to the elevator door gradually thicken upward from the connection point with the plug 13, forming a lower surface structure that fits with the obtuse angle surface on the support plate after the plug 13 is inserted. Furthermore, after the plug 13 is inserted into the slot, the inclined surface of the support plate fits and supports the lower surface structure of the two side walls adjacent to the elevator door.

[0066] The air cushion device 22 is used to support the elevator car at the end. After the cushion is punctured, the elevator car continues to fall. The air cushion device 22 is equipped with a compressed air cylinder. Gas is injected into the cushion through the compressed air cylinder, causing the cushion to expand and provide a second cushioning for the elevator car. This solution uses air to cushion the elevator car. During the contact with the ground, the cushion deforms due to the pressure from the elevator car and expands outwards. After expanding to make full contact with the puncture needle 23, it is punctured by the needle 23, preventing the cushion from rebounding and causing the elevator car to bounce. This achieves the effect of cushioning and decelerating the elevator car and preventing its rebound. The inflated cushion then serves as a support for the elevator car. This eliminates the safety hazards of insufficient rigidity of the hydraulic rod, which may break and fail to provide cushioning, or puncture the elevator car floor 2 and injure passengers, thus ensuring passenger safety.

[0067] The bearing area can be a standing area for passengers. The slot and plug 13 cooperate to fix the two side walls adjacent to the elevator door. After the two side walls adjacent to the elevator door are fixed, a support mechanism is provided on the outside of the slot to maintain its stability in the horizontal direction. It can be a support plate. The support plate can adopt a triangular structure, that is, the side away from the bearing area is perpendicular to the bearing surface of the bearing area, and the side facing the bearing area forms an obtuse angle with the bearing surface of the bearing area. The side walls of the two side walls adjacent to the elevator door that face away from the bearing area protrude outward compared with the side walls of plug 13 that face away from the bearing area. The two side walls adjacent to the elevator door gradually thicken from the bottom where they connect with plug 13 to form the lower surface structure, so that the inclined surface of the support plate fits and supports the lower surface structure of the two side walls adjacent to the elevator door. The bottom plate and the two side walls adjacent to the elevator door adopt an integrally formed splicing structure, which is more stable than the connection method using connectors, has better compressive load-bearing capacity, and ensures passenger safety.

[0068] In some embodiments of this application, the top plate 3 includes a decorative area for mounting equipment and a groove disposed on the outside of the decorative area; protruding tops 12 that mate with the groove are provided above the two side walls adjacent to the elevator door, and the protruding tops 12 are inserted into the groove for insertion and fixation; the top plate 3 also includes a pressing mechanism disposed on the outside of the groove; the pressing mechanism is a downwardly upright pressing plate; the pressing plate is a metal plate forming the top plate 3, a downwardly bent metal component; the side of the pressing plate away from the decorative area is perpendicular to the decorative surface of the decorative area; the side of the pressing plate facing the device area has an obtuse angle fit structure with the decorative surface of the decorative area; The two side walls adjacent to the elevator door facing the decorative area are on the same plane as the side of the convex top 12 facing the decorative area; the two side walls adjacent to the elevator door facing away from the decorative area protrude outwards compared to the side of the convex top 12 facing away from the decorative area, and have a thicker structure; the two side walls adjacent to the elevator door gradually thicken downwards from the connection point with the convex top 12 at the top, forming an upper surface structure that fits against the obtuse angle surface of the lower pressure plate after being inserted into the convex top 12; furthermore, after the convex top 12 is inserted into the groove, the inclined surface of the lower pressure plate fits against and presses against the upper surface structure of the two side walls adjacent to the elevator door.

[0069] The decorative area can be used to install ceiling lights or other components. The groove and the raised top 12 cooperate to fix the two side walls adjacent to the elevator door. After the two side walls adjacent to the elevator door are fixed, in order to maintain the horizontal stability of the two side walls adjacent to the elevator door, a pressing mechanism is set on the outside of the groove. This can be a pressing plate. The pressing plate can adopt a triangular structure, that is, the side away from the decorative area is perpendicular to the decorative surface of the decorative area, and the side facing the decorative area forms an obtuse angle with the decorative surface of the decorative area. The side walls adjacent to the elevator door that face away from the decorative area protrude outward compared to the side of the raised top 12 that faces away from the decorative area. The two side walls adjacent to the elevator door gradually thicken downward from the connection point with the raised top 12 to form the upper surface structure, so that the inclined surface of the pressing plate fits and supports the upper surface structure of the two side walls adjacent to the elevator door. The top plate 3 and the two side walls adjacent to the elevator door adopt an integrally molded splicing structure, which is more stable and has better compressive load-bearing capacity than the connection method using connectors, further ensuring passenger safety.

[0070] In some embodiments of this application, the needle 23 is at a 40-50 degree angle to the surface of the base plate 2.

[0071] The tilt angle of the needle 23 not only affects whether the capsule can be stably pierced, but also has the potential to pierce the base plate 2. Placing the needle 23 at an angle of 40 to 50 degrees to the surface of the base plate 2 can better ensure that the capsule can be stably pierced. An angle greater than 40 degrees or less than 50 degrees will increase the risk of the capsule not being pierced. At the same time, if the elevator car falls to the bottom of the base plate 2, the needle 23 can bend under pressure and become flush with the base plate 2, preventing the needle 23 from piercing the base plate 2, thus further ensuring the safety of passengers.

[0072] In some embodiments of this application, the car is further provided with an electronic air pump and an energy storage battery. The energy storage battery is placed inside the side wall 1. The power output terminal of the energy storage battery is connected to the power input terminal of the electronic air pump. The signal input terminal of the electronic air pump is connected to the signal output terminal of the elevator control system. The air outlet of the electronic air pump is connected to the air inlet of the bag and the air inlet of the cushion respectively.

[0073] In practical use, the full deployment of the airbag should ideally be completed before it contacts the ground. To prevent accidents caused by unforeseen circumstances where the compressed air tank is insufficient to inflate the airbag, an electronic air pump can be used to continuously inflate the airbag, ensuring it is fully inflated. Simultaneously, the cushioning material is also continuously inflated to ensure it is fully inflated upon contact with the ground. The electronic air pump is powered by an independent energy storage battery, preventing it from malfunctioning during elevator power outages. The energy storage battery is located on the side wall of the elevator car to prevent it from catching fire due to impact. The continuous filling of the airbag and cushioning material by the electronic air pump, along with the independently powered energy storage battery and its installation location, further ensures passenger safety.

[0074] In some embodiments of this application, the side of the elevator car is provided with an extendable balance support 11, the balance support 11 including a connecting rod 112 and an electro-hydraulic control rod 111; one end of the electro-hydraulic control rod 111 is movably connected to the side wall 1 of the elevator car via a rotating shaft, and the other end is connected to a contact mechanism 113; one end of the electro-hydraulic control rod 111 is connected to the side wall 1 of the elevator car, and the other end is movably connected to the rod surface of the connecting rod 112; the signal input end of the electro-hydraulic control rod 111 is connected to the signal output end of the elevator control system.

[0075] The balance bracket 11 is used to maintain the balance of the elevator car during a fall, ensuring that the cushioning unit directly contacts the ground. This prevents the cushioning unit from failing to make sufficient contact with the ground due to the elevator car tilting, thus preventing it from being punctured by the needle 23. It also prevents passenger collisions caused by the swaying of the elevator car during its descent. The balance bracket 11 employs an electro-hydraulic control rod 111 and a connecting rod 112 connected to the side wall 1, as well as a contact mechanism 113. The electro-hydraulic control rod 111 controls the opening of the connecting rod 112, which contacts the elevator shaft wall through the contact mechanism 113 at its other end. This design not only stabilizes the elevator car and prevents passenger collisions caused by swaying during its descent, but also ensures that the cushioning unit and the padding unit fully perform their functions, further guaranteeing passenger safety.

[0076] In some embodiments of this application, the contact mechanism 113 includes a roller or a friction block; the surface of the friction block that contacts the elevator shaft wall is curved.

[0077] The contact mechanism 113 is used for contact with the elevator shaft wall. It can employ a pulley structure to maintain the stability of the elevator car. Alternatively, it can use a friction block, which can be curved to prevent damage to the friction block due to unevenness of the shaft wall. Using a friction block can increase friction to a certain extent, thereby reducing the descent speed of the elevator car and further ensuring passenger safety.

[0078] In some embodiments of this application, the side wall 1 of the car is provided with an upwardly extending ladder, and the top plate is provided with an escape passage corresponding to the ladder.

[0079] In some embodiments of this application, the elevator control system has a microprocessor system; the microprocessor system is connected to a distance sensor located at the bottom of the elevator car; the microprocessor may employ the following processing steps:

[0080] Step S101: The microprocessor system calculates the elevator's descent speed based on the changes in time and the values ​​of the ranging sensor.

[0081] Step S102: The microprocessor system continuously acquires multiple elevator height data values ​​through a distance sensor placed at the bottom of the elevator car, and confirms that the elevator is moving downward based on the multiple elevator height data values ​​that change over time.

[0082] Step S103: Determine whether the elevator's descent speed exceeds a preset speed alarm threshold;

[0083] Step S104: If the speed alarm threshold is exceeded, the estimated time for the elevator to fall to the ground is obtained based on the elevator height data and time data, and compared with the preset time for the safe ejection of the capsule.

[0084] Step S105: When it is confirmed that the difference between the elevator's falling time and the capsule's ejection time is less than 0.3 seconds, send an opening valve control command to the electronic valve to make the compressed air tank and the capsule air-connected.

[0085] Step S106: Send a control command to the electronic air valve to open the air valve so that the compressed air cylinder is connected to the air cushion air.

[0086] The following is through Figure 4 The method described in this application will be further elaborated.

[0087] Step S101: The microprocessor system calculates the elevator's descent speed based on the changes in time and the values ​​of the distance sensor.

[0088] Step S102: The microprocessor system continuously acquires multiple elevator height data values ​​through a distance sensor placed at the bottom of the elevator car, and confirms that the elevator is moving downward based on the multiple elevator height data values ​​that change over time.

[0089] A distance sensor can be installed at the bottom of the elevator car to obtain elevator height data. The elevator height data can be continuously obtained at a certain frequency to monitor whether the elevator car is moving downward and to calculate the descent speed.

[0090] The elevator's descent speed can be obtained by measuring elevator height data and changes over time, or a speed measuring instrument can be used directly.

[0091] Step S103: Determine whether the elevator descent speed exceeds the preset speed alarm threshold.

[0092] The speed alarm threshold can be preset manually to determine whether the elevator car's downward movement exceeds the safe speed. If it does, it can be determined that the elevator car is falling.

[0093] In some embodiments of this application, after determining whether the elevator descent speed exceeds a preset speed alarm threshold, if it does, a control command to deploy the balance support is sent to make the balance support contact the elevator shaft wall.

[0094] If the speed exceeds the preset alarm threshold, a balance bracket can be used to balance the elevator car, and the speed can be reduced by friction between the friction mechanism and the elevator shaft wall.

[0095] Step S104: If the speed alarm threshold is exceeded, the estimated time for the elevator to fall to the ground is obtained based on the elevator height data and time data, and compared with the preset time for the safe ejection of the capsule.

[0096] The safe ejection time of the gas chamber includes the time required for it to eject and fill with gas. Ideally, the gas chamber should eject and fill with gas at the same time and then contact the ground. The ejection and filling time of the gas chamber can be calculated. However, the time it takes for the elevator to fall to the ground needs to be calculated based on the specific circumstances. The two times need to be compared.

[0097] Step S105: When it is confirmed that the difference between the elevator's falling time and the capsule's ejection time is less than 0.3 seconds, a valve opening control command is sent to the electronic valve to make the compressed air tank and the capsule air-connected.

[0098] Ideally, the capsule pops out and fills with gas simultaneously with its contact with the ground, so the elevator's descent time is the same as the capsule's descent time. At this point, an opening valve control command is sent to the electronic valve to fill the capsule with gas. Under normal circumstances, when the difference between the elevator's descent time and the capsule's descent time is less than 0.3 seconds, the electronic valve can send an opening valve control command to fill the capsule with gas, ensuring that the capsule is filled in advance.

[0099] Step S106: Send a control command to the electronic air valve to open the air valve so that the compressed air cylinder is connected to the air cushion air.

[0100] In some embodiments of this application, after sending an open valve control command to the electronic valve, a start control command may also be sent to the electronic air pump to continuously inflate the bladder and cushion.

[0101] In some embodiments of this application, after the method, it is determined whether the elevator descent speed is 0 within a preset time interval; if so, a shutdown control command is sent to the electronic air pump to shut it down.

[0102] If the elevator's descent speed is 0, it means the elevator has touched the ground, and the electronic air pump can be turned off.

[0103] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0104] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices recited in the apparatus claims may also be implemented by a single unit or device in software or hardware. The terms "first," "second," etc., are used to indicate names and do not indicate any particular order.

Claims

1. An airbag pre-collision active safety elevator car, including side walls, top plate, and bottom plate, as well as an elevator control system, characterized in that: An airbag device is provided at the bottom of the base plate. The airbag device is located in the central area of ​​the bottom of the base plate. The airbag device includes a downward-facing airbag body and a compressed air tank. The air outlet of the compressed air tank is connected to the air inlet of the airbag body. An electronic valve is provided at the air outlet of the compressed air tank. The signal input terminal of the electronic valve is communicatively connected to the signal output terminal of the elevator control system. The airbag device is surrounded by needles with the needle tips facing downwards and tilted towards the center of the bottom of the base plate. When the airbag is an inflated spherical structure, the distance between the needle tip and the inflated airbag is 1.2 to 1.5 times the radius of the airbag. When the airbag is squeezed by the elevator car and the ground, the airbag expands and deforms outwards with the degree of compression until the needle punctures the airbag and the air inside the airbag is released. An air cushion device is provided on the edge of the base plate. The air cushion device has an inflatable hollow cushion body placed downwards and a compressed air cylinder. The air outlet of the compressed air cylinder is connected to the air inlet of the cushion body. An electronic air valve is provided at the air outlet of the compressed air cylinder. The signal input terminal of the electronic air valve is communicatively connected to the signal output terminal of the elevator control system. The base plate includes a load-bearing area for supporting heavy objects, and slots located on the outside of the load-bearing area; The two side walls adjacent to the elevator door are equipped with plugs that mate with slots. The plugs are inserted into the slots for connection and fixation. The plug has a protrusion extending toward the bearing area, and the slot has a recess that adapts to the protrusion; The base plate also includes a support mechanism located on the outside of the slot; The support mechanism is an upward-standing support plate; The support plate is a metal plate that forms the base plate; it is an upwardly bent metal component. The side of the support plate furthest from the load-bearing area is perpendicular to the load-bearing surface of the load-bearing area. The side of the support plate facing the load-bearing area has an obtuse angle fit with the load-bearing surface of the load-bearing area. The two side walls adjacent to the elevator door facing the load-bearing area and the plug facing the load-bearing area are on the same plane; The two side walls adjacent to the elevator door, facing away from the load-bearing area, protrude outwards compared to the side of the plug facing away from the load-bearing area, and have a thicker structure. The two side walls adjacent to the elevator door gradually thicken upwards from the connection point with the plug, forming a lower surface structure that fits against the obtuse angled surface of the support plate after the plug is inserted. Furthermore, after the plug is inserted into the slot, the inclined surface of the support plate fits and supports the lower surface structure of the two side walls adjacent to the elevator door.

2. The airbag pre-collision active safety elevator car according to claim 1, characterized in that: The top plate includes a decorative area for mounting equipment, and a recess located on the outside of the decorative area; The two side walls adjacent to the elevator door are provided with protruding tops that mate with the grooves. The protruding tops are inserted into the grooves for connection and fixation. The top plate also includes a pressing mechanism disposed on the outside of the groove; The pressing mechanism is a downward-standing pressing plate; The pressure plate is a metal plate that forms the top plate; it is a metal component that bends downwards. The side of the lower pressure plate furthest from the decorative area is perpendicular to the decorative surface of the decorative area. The side of the lower pressure plate facing the device area has an obtuse angle fit with the decorative surface of the decorative area. The two side walls adjacent to the elevator door facing the decorative area are on the same plane as the surface of the dome facing the decorative area. The two side walls adjacent to the elevator door, facing away from the decorative area, protrude outwards and have a thicker structure compared to the side of the dome facing away from the decorative area. The two side walls adjacent to the elevator door gradually thicken downwards from the connection point with the convex top, forming an upper surface structure that fits against the obtuse angle of the surface on the lower pressure plate after being inserted into the convex top. Furthermore, after the convex top is inserted into the groove, the inclined surface of the lower pressure plate is pressed against the upper surface structure of the two side walls adjacent to the elevator door.

3. The airbag pre-collision active safety elevator car according to claim 1, characterized in that, The needle is at an angle of 40 to 50 degrees to the surface of the base plate.

4. The airbag pre-collision active safety elevator car according to claim 1, characterized in that, The car is also equipped with an electronic air pump and an energy storage battery. The energy storage battery is placed inside the side wall. The power output terminal of the energy storage battery is connected to the power input terminal of the electronic air pump. The signal input terminal of the electronic air pump is connected to the signal output terminal of the elevator control system. The air outlet of the electronic air pump is connected to the air inlet of the bag and the air inlet of the cushion respectively.

5. The airbag pre-collision active safety elevator car according to claim 1, characterized in that, The side of the car is provided with an extendable balance support, which includes a connecting rod and an electro-hydraulic control rod. One end of the connecting rod is connected to the side wall of the elevator car, and the other end is connected to a contact mechanism; One end of the electro-hydraulic control rod is movably connected to the side wall of the elevator car via a rotating shaft, and the other end is movably connected to the rod surface of the connecting rod. The signal input end of the electro-hydraulic control rod is connected to the signal output end of the elevator control system.

6. The airbag pre-collision active safety elevator car according to claim 5, characterized in that, The contact mechanism includes: Roller or friction block; The surface of the friction block that contacts the elevator shaft wall is curved.

7. The airbag pre-collision active safety elevator car according to claim 1, characterized in that, The side wall of the car is provided with an upward-extending ladder, and the top plate is provided with an escape passage corresponding to the ladder.

8. The airbag pre-collision active safety elevator car according to claim 1, characterized in that, The elevator control system has a microprocessor system; The microprocessor system is connected to a distance sensor located at the bottom of the elevator car; The microprocessor system calculates the elevator's descent speed based on changes in time and the values ​​from the ranging sensor. The microprocessor system continuously acquires multiple elevator height data values ​​through a distance sensor placed at the bottom of the elevator car, and confirms that the elevator is moving downward based on the multiple elevator height data values ​​that change over time. Determine whether the elevator's descent speed exceeds a preset speed alarm threshold; If the speed alarm threshold is exceeded, the estimated time for the elevator to fall to the ground is obtained based on the elevator height data and time data, and compared with the preset time for the safe ejection of the capsule. When it is confirmed that the difference between the elevator's falling time and the capsule's ejection time is less than 0.3 seconds, a valve opening control command is sent to the electronic valve to make the compressed air tank and the capsule air-connected. Send a control command to the electronic air valve to open the air valve, so that the compressed air cylinder is connected to the air cushion air.

9. The airbag pre-collision active safety elevator car according to claim 8, characterized in that, After determining whether the elevator's descent speed exceeds a preset speed alarm threshold, the method further includes: If the speed alarm threshold is exceeded, a control command to deploy the balance support is sent to make the balance support contact the elevator shaft wall.

10. The airbag pre-collision active safety elevator car according to claim 8, characterized in that, After sending the valve opening control command to the electronic valve, the process also includes: A start control command is sent to the electronic air pump to continuously inflate the bladder and cushion.

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