Flexible elevator fall protection system

Abstract

The present application relates to the field of elevator safety technology, especially to a flexible elevator anti-falling protection system, aiming at solving the problem that the traditional elevator falling protection mode makes the elevator of high-rise building decelerate too fast, and the buffer vibration generated by the elevator is easy to cause harm to the elevator passengers. The flexible elevator anti-falling protection system comprises a brake, an anti-falling net part, a composite buffer part, a counterweight part and a sensor part, wherein the speed sensor is used to detect the running speed of the elevator in real time to determine whether a falling event occurs, the first distance sensor and the second distance sensor are used to determine the initial falling height of the elevator, and through the cooperation of the brake, the anti-falling net part, the composite buffer part, the counterweight part and the sensor part, the elevator obtains a suitable acceleration during the falling process, so that the passengers in the elevator can be effectively protected, and the problem that the traditional protection mode decelerates too fast and the buffer vibration generated by the elevator is easy to cause harm to the elevator passengers is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator safety technical field, especially to a flexible elevator anti-falling protection system. BACKGROUND

[0002] With the development of domestic construction industry, the number and height of buildings are increasing, and the elevator becomes an essential part of daily life of residents, so the elevator safety is particularly important.

[0003] The existing elevator anti-falling protection mode still uses the brake to brake and the spring buffer or hydraulic buffer to buffer.

[0004] However, due to the increase of floor height, the traditional elevator anti-falling protection mode has been difficult to meet the problem of fast falling speed and large falling energy of high floor elevator, and the traditional elevator falling protection mode makes the elevator of high floor decelerate too fast, and the buffer vibration generated by the elevator is easy to cause harm to the elevator passengers. SUMMARY

[0005] The present application provides a flexible elevator anti-falling protection system to solve the problem that the traditional elevator falling protection mode makes the elevator of high floor decelerate too fast, and the buffer vibration generated by the elevator is easy to cause harm to the elevator passengers.

[0006] In order to achieve the above purpose, the present application provides a flexible elevator anti-falling protection system, which comprises a brake, an anti-falling net part, a composite buffer part, a counterweight part and a sensor part, the brake is installed in the machine room, and the brake is connected with the car frame through a steel rope; the anti-falling net part is installed at the hovering position of each floor elevator, and the anti-falling net part comprises a square anti-falling net fixing frame, a rope collecting motor, a traction rope guide seat, an anti-falling net traction arm fixed crossbeam, a third electromagnet, a square anti-falling net, an anti-falling net traction arm and a traction rope fixed pulley, the square anti-falling net fixing frame is fixed on the rear wall of the elevator shaft, two anti-falling net traction arms are fixed at each floor, the lower end of the anti-falling net traction arm is rotatably installed on the mounting seat of the rear wall of the elevator shaft, the upper end of the anti-falling net traction arm is attracted by the third electromagnet fixed on the rear wall of the elevator shaft, the anti-falling net traction arm fixed crossbeam is fixed in the elevator shaft and located in front of the car, two traction rope fixed pulleys are symmetrically fixed at each floor, the traction rope fixed pulley is installed on the side of the anti-falling net traction arm close to the elevator shaft, the lower end of the square anti-falling net is connected with the square anti-falling net fixing frame, the upper end of the square anti-falling net is connected with the anti-falling net traction arm, two rope collecting motors are symmetrically arranged at each floor, the rope collecting motor and the traction rope guide seat are fixed on the front wall surface of the elevator shaft, the traction rope guide seat is located on both sides of the rope collecting motor, and the lead wire on the rope collecting motor passes through the traction rope guide seat and the traction rope fixed pulley and is connected with the hole arranged at the lower end of the anti-falling net traction arm.

[0007] The composite buffer part is installed below the elevator shaft, opposite to the bottom surface of the car, the lower end of the car is provided with a second electromagnet, the composite buffer part comprises a high-pressure gas tank and a composite buffer device, the composite buffer device comprises an air bag, a first electromagnet, a polyurethane buffer column and a water bag, the first electromagnet is fixed on the air bag, the air bag is fixed on the water bag, the water bag is provided with a cylindrical space for accommodating the polyurethane buffer column, the second electromagnet is opposite to the first electromagnet in magnetic property; the both sides of the counterweight are fixedly installed with telescopic hydraulic rods, the end of the telescopic hydraulic rod is installed with a deceleration rubber pad, the bottom of the counterweight is installed with a first distance sensor; the sensor part comprises a speed sensor and a second distance sensor, the speed sensor and the second distance sensor are installed on the bottom of the car.

[0008] In the flexible elevator anti-falling protection system, optionally, the middle grid of the square anti-falling net is dense, and the periphery grid is sparse.

[0009] In the flexible elevator anti-falling protection system, optionally, the left and right sides of the car frame are installed with telescopic car frame guide plates.

[0010] In the flexible elevator anti-falling protection system, optionally, the sensor part further comprises a first light sensor, and the first light sensor is installed on the elevator car guide rail.

[0011] In the flexible elevator anti-falling protection system, optionally, the sensor part further comprises a first electromagnetic sensor and a second electromagnetic sensor, the first electromagnetic sensor and the second electromagnetic sensor are fixed on the wall below the machine room, the steel rope of the traction elevator passes through the first electromagnetic sensor, and the steel rope of the traction elevator counterweight passes through the second electromagnetic sensor.

[0012] In the flexible elevator anti-falling protection system, optionally, the sensor part further comprises a second light sensor and a third light sensor, the second light sensor and the third light sensor are installed in the machine room and are located beside the first fixed pulley and the second fixed pulley of the traction respectively.

[0013] In the flexible elevator anti-falling protection system, optionally, a control cabinet and a distribution box are installed in the machine room, a controller is installed in the control cabinet, and a buffer spring is installed on the ground below the elevator counterweight.

[0014] The flexible elevator anti-falling protection system provided by the application comprises a brake, an anti-falling net part, a composite buffer part, a counterweight part and a sensor part, wherein a speed sensor is used to detect whether the running speed of the elevator is abnormal in real time, so as to determine whether a falling event occurs, a first distance sensor and a second distance sensor are used to determine the initial falling height of the elevator, and provide a basis for subsequent selection of the friction coefficient of the brake and the working floor of the square anti-falling net, through cooperation of the brake, the anti-falling net part, the composite buffer part, the counterweight part and the sensor part, the elevator obtains a suitable acceleration in the falling process, so that passengers in the elevator can be effectively protected, and the problem that the traditional protection mode is too fast to slow down and the buffer vibration generated by the elevator is easy to cause harm to the passengers in the elevator is solved.

[0015] The configuration of the application and other inventive objects and advantages thereof will be more apparent through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 The front view structural schematic diagram of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0018] Figure 2 The cross-sectional view structural schematic diagram of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0019] Figure 3 The structural schematic diagram of the anti-falling net part of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0020] Figure 4 The cross-sectional view structural schematic diagram of the composite buffer part of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0021] Figure 5 The structural schematic diagram of the counterweight part of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0022] Figure 6 The structural schematic diagram of the brake of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0023] Figure 7 The cross-sectional view structural schematic diagram of the brake of the flexible elevator anti-falling protection system provided by the embodiment of the application;

[0024] Figure 8 The bottom structure schematic diagram of the flexible elevator anti-falling protection system provided by the embodiment of the present application is shown in the figure.

[0025] Figure 9 The structure schematic diagram of the car frame of the flexible elevator anti-falling protection system provided by the embodiment of the present application is shown in the figure.

[0026] Figure 10 The structure schematic diagram of the square anti-falling net of the flexible elevator anti-falling protection system provided by the embodiment of the present application is shown in the figure.

[0027] Mark explanation:

[0028] 1-control cabinet; 2-lifting motor; 3-first light sensor; 4-elevator car guide rail; 5-car frame; 6-elevator door; 7-square anti-falling net fixing frame; 8-high pressure gas tank; 9-composite buffer device; 10-rope winding motor; 11-traction rope guide seat; 12-anti-falling net traction arm fixing crossbeam; 13-car; 14-accompanying cable; 15-first electromagnetic sensor; 16-brake; 17-distribution box; 18-first fixed pulley; 19-second light sensor; 20-second electromagnetic sensor; 21-third electromagnetic; 22-counterweight; 23-buffer spring; 24-air bag; 25-first electromagnetic; 26-second electromagnetic; 27-third light sensor; 28-second fixed pulley; 29-square anti-falling net; 30-anti-falling net traction arm; 31-traction rope fixed pulley; 32-polyurethane buffer column; 33-water bag; 34-telescopic hydraulic rod; 35-deceleration rubber gasket; 36-first distance sensor; 37-brake disc telescopic dowel; 38-brake disc; 39-traction rope deceleration hydraulic cylinder; 40-rotating wheel; 41-rotating wheel side plate; 42-speed sensor; 43-second distance sensor; 44-machine room; 45-car frame guide plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar parts or parts with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0030] As Figures 1-10As shown, the present application provides a flexible elevator anti-falling protection system, which comprises a brake 16, an anti-falling net part, a composite buffer part, a counterweight part and a sensor part, the brake 16 is installed in the machine room 44, and the brake 16 is connected with the car frame 5 through a steel rope;

[0031] It should be noted that the brake 16 comprises a brake disc telescopic pin 37, a brake disc 38, a traction rope speed reduction hydraulic cylinder 39, a runner 40 and a runner side plate 41, the clamping force of the two brake discs 38 on the runner side plate 41 is changed by changing the length of the brake disc telescopic pin 37, the degree of fit between the steel rope and the runner 40 is changed by changing the telescopic length of the traction rope speed reduction hydraulic cylinder 39, so as to change the friction coefficient of the brake, the brake 16 is symmetrically provided with two, the two brakes 16 are synchronously operated, the friction coefficient of the brake 16 is adjustable, different friction coefficients are selected according to the falling height of the elevator, when the falling height of the elevator is large, the deceleration process is long, and then a smaller friction coefficient is adopted, when the falling height of the elevator is small, the friction coefficient can be appropriately increased, the discomfort brought to the human body by the change of acceleration is considered while ensuring that the brake 16 can effectively reduce the acceleration of the elevator; in addition, the car 13 is installed on the car frame 5.

[0032] The anti-falling net part is installed at the hovering position of each floor of the elevator, and the anti-falling net part comprises a square anti-falling net fixing frame 7, a rope collecting motor 10, a traction rope guide seat 11, an anti-falling net traction arm fixing cross beam 12, a third electromagnet 21, a square anti-falling net 29, an anti-falling net traction arm 30 and a traction rope fixing pulley 31, the square anti-falling net fixing frame 7 is directly fixed on the rear wall of the elevator shaft, two anti-falling net traction arms 30 are fixed at each floor, the lower end of the anti-falling net traction arm 30 is rotatably installed on the mounting seat of the rear wall of the elevator shaft, the upper end of the anti-falling net traction arm 30 is attracted by the third electromagnet 21 fixed on the rear wall of the elevator shaft, the anti-falling net traction arm fixing cross beam 12 is fixed in the elevator shaft and located in front of the car 13, two traction rope fixing pulleys 31 are symmetrically fixed at each floor, the traction rope fixing pulley 31 is installed on the side of the anti-falling net traction arm 30 close to the elevator shaft, the lower end of the square anti-falling net 29 is connected with the square anti-falling net fixing frame 7, and the upper end of the square anti-falling net 29 is connected with the anti-falling net traction arm 30, two rope collecting motors 10 are symmetrically arranged at each floor, the rope collecting motor 10 and the traction rope guide seat 11 are fixed on the front wall of the elevator shaft, the traction rope guide seat 11 is located on both sides of the rope collecting motor 10, and the lead line on the rope collecting motor 10 passes through the traction rope guide seat 11 and the traction rope fixing pulley 31 and is connected with the hole arranged at the lower end of the anti-falling net traction arm 30.

[0033] It should be noted that the anti-falling net part is installed at the hovering position of each floor elevator, i.e. below each floor elevator door 6; the square anti-falling net 29 is laid on the back wall of the elevator shaft; the traction rope guide hole is arranged on the traction rope guide seat 11, the traction rope of the rope collecting motor 10 starts from the front wall of the elevator shaft, passes through the closed groove left in the left or right wall of the elevator shaft, reaches the back wall of the elevator shaft, and is connected with the lower end of the anti-falling net traction arm 30 through the traction rope fixed pulley 31 installed on the back wall of the elevator shaft.

[0034] The composite buffer part is installed below the elevator shaft, opposite to the bottom surface of the car 13, the lower end of the car 13 is provided with a second electromagnet 26, the composite buffer part includes a high-pressure gas tank 8 and a composite buffer device 9, the composite buffer device 9 includes an air bag 24, a first electromagnet 25, a polyurethane buffer column 32 and a water bag 33, the first electromagnet 25 is fixed on the air bag 24, the air bag 24 is fixed on the water bag 33, the water bag 33 is provided with a cylindrical space for accommodating the polyurethane buffer column 32, the second electromagnet 26 is opposite to the magnetism of the first electromagnet 25; the telescopic hydraulic rod 34 is fixedly installed on both sides of the counterweight 22, the end of the telescopic hydraulic rod 34 is provided with a deceleration rubber pad 35, and the first distance sensor 36 is installed on the bottom of the counterweight 22; the sensor part includes a speed sensor 42 and a second distance sensor 43, and the speed sensor 42 and the second distance sensor 43 are installed on the bottom of the car 13.

[0035] It should be noted that when the elevator loses speed, the telescopic hydraulic rod 34 is quickly extended, pushing the deceleration rubber pad 35 to tightly contact with the counterweight guide rail, so that the counterweight 22 is quickly stopped; the position of the counterweight 22 measured by the first distance sensor 36 and the position of the car 13 measured by the second distance sensor 43 together determine which floor rope collecting motor 10 works;

[0036] The brake 16 and the rope collecting motor 10 are electrically connected with the controller, the speed sensor 42 and the second distance sensor 43 are signal connected with the controller, the first electromagnet 25 is located at the uppermost end of the composite buffer device 9, the water bag 33 is located at the lowermost end of the composite buffer device 9, the second electromagnet 26 is powered through the traveling cable 14 of the car 13, the speed sensor 42 is used to detect the running speed of the elevator in real time, so as to judge whether the falling event occurs, the second distance sensor 43 is used to judge the initial falling height of the elevator, and provide the basis for the subsequent selection of the friction coefficient of the brake 16 and the working floor of the square anti-falling net 29; in the moment of falling of the elevator, the folded air bag 24 is blown up by the high-pressure gas tank 8, the first electromagnet 25 and the second electromagnet 26 are powered to form an electromagnetic field, the square anti-falling net 29 is unfolded, and the brake 16 reduces the acceleration of the falling elevator; if the floor is high, the brake 16, the square anti-falling net 29 and the magnetic field cannot make the elevator completely stop falling, and the elevator will fall on the first electromagnet 25, and the air bag 24, the water bag 33 and the polyurethane buffer column 32 buffer it, the energy of the elevator at this time is small, and the falling impact and the buffer oscillation are not too large; through the cooperation of the brake 16, the anti-falling net part, the composite buffer part, the counterweight part and the sensor part, the elevator obtains a suitable acceleration in the falling process, so that the passengers in the elevator can be effectively protected, and the problem that the traditional protection mode decelerates too fast and the buffer vibration of the elevator easily causes harm to the passengers in the elevator is solved.

[0037] As shown in Figure 9 The left and right sides of the car frame 5 are provided with retractable car frame guide plates 45.

[0038] It should be noted that a plurality of retractable car frame guide plates 45 are installed on the left and right sides of the car frame 5, and the guide plates are retracted after encountering an obstacle, but the remaining guide plates are still in the grooves, maintaining the pose of the car frame.

[0039] As shown in Figure 10 The middle grid of the square anti-falling net 29 is dense, and the grid around the middle grid is sparse.

[0040] It should be noted that the middle grid of the square anti-falling net 29 is dense, and the grid around the middle grid is sparse, so as to wrap the elevator and prevent the elevator from tilting.

[0041] As shown in Figure 1 The sensor part further comprises a first light sensor 3, and the first light sensor 3 is installed on the elevator car guide rail 4.

[0042] It should be noted that the first light sensor 3 is used to detect the diameter of the steel rope between the brake 16 and the car frame 5, so as to remind the staff to replace it in time.

[0043] As shown in Figures 1-2As shown, the sensor part further comprises a first electromagnetic sensor 15 and a second electromagnetic sensor 20, which are fixed on the wall below the machine room 44, the steel rope of the traction elevator passes through the first electromagnetic sensor 15, and the steel rope of the traction elevator counterweight 22 passes through the second electromagnetic sensor 20.

[0044] It should be noted that the first electromagnetic sensor 15 is used to detect whether the diameter of the steel rope of the traction elevator is within a safe range, and the second electromagnetic sensor 20 is used to detect whether the diameter of the steel rope of the traction elevator counterweight 22 is within a safe range, reminding the staff to replace in time.

[0045] As shown in the figure, Figures 1-2 The sensor part further comprises a second light sensor 19 and a third light sensor 27, which are installed in the machine room 44 and located beside the first fixed pulley 18 and the second fixed pulley 28 of the traction respectively.

[0046] It should be noted that the first fixed pulley 18 is driven by the lifting motor 2, the second light sensor 19 is used to detect the distance between the steel rope of the traction elevator counterweight 22 and the second light sensor 19, and the third light sensor 27 is used to detect the distance between the steel rope of the traction elevator and the third light sensor 27, so as to judge the wear degree of the pulley through the distance of the steel rope to the sensor, remind the staff to replace in time, and prevent falling accidents caused by damage of the steel rope.

[0047] As shown in the figure, Figures 1-2 The control cabinet 1 and the distribution box 17 are installed in the machine room 44, the controller is installed in the control cabinet 1, and the buffer spring 23 is installed on the ground below the elevator counterweight 22.

[0048] It should be noted that the distribution box 17 supplies power to the whole system, the controller controls the actions of the brake 16, the anti-falling net part, the composite buffer part and the sensor part, and the buffer spring 23 provides buffer for the elevator counterweight 22.

[0049] When the elevator is working normally, the first electromagnetic sensor 15 and the second electromagnetic sensor 20 are used to detect whether the diameter of the traction rope and the counterweight 22 of the elevator is within the safe range; the second light sensor 19 and the third light sensor 27 are used to detect the distance between the traction rope and the sensor, and the wear degree of the pulley is determined by the distance from the rope to the sensor; when the elevator falls, the speed measured by the speed sensor 42 exceeds the limit value, the height of the elevator when falling is determined according to the measurement data of the second distance sensor 43, and then the friction coefficient of the brake 16 is selected, and the first stage braking is performed through the brake 16 to reduce the kinetic energy of the elevator; at the same time, the telescopic hydraulic rod 34 is quickly extended, the deceleration rubber pad 35 is pressed to tightly fit the counterweight guide rail, the counterweight 22 is quickly stopped, and the controller selects the rope winding motor 10 according to the data measured by the first distance sensor 36 and the second distance sensor 43. The third electromagnet 21 loses magnetism after being powered off, the rope winding motor 10 located below the elevator and not interfering with the counterweight 22 during the working process is rotated, the traction rope is wound and pulled, the anti-falling net traction arm 30 passes through between the elevator car guide rail 4 and the counterweight guide rail, and the square anti-falling net 29 is completely unfolded. It should be noted that the anti-falling net traction arm 30 is tilted on the anti-falling net traction arm fixed cross beam 12, the anti-falling net traction arm fixed cross beam 12 is used as a support, part of the car frame guide plate 45 will interfere with the anti-falling net traction arm 30 when the car frame 5 passes through the square anti-falling net 29, but the interfering car frame guide plate 45 will be retracted and then pass through between the two anti-falling net traction arms 30 without interfering with the car anti-falling net traction arm 30. The car frame guide plate 45 that does not interfere with the car anti-falling net traction arm 30 is still elongated and clamped into the car frame guide rail 4 to maintain the pose of the car 5. At the same time, the valve of the high-pressure gas tank 8 is opened, the air bag 24 rapidly expands to meet the falling car upward, the second electromagnet 26 and the first electromagnet 25 are both powered by the traveling cable 14 of the car 13 to generate a mutual magnetic field, so that the brake 16, the square anti-falling net 29 and the magnetic field consume the energy of the elevator.

[0050] In order to make the reverse acceleration of the elevator not higher than the range that the human body can withstand in the falling process, the resistance of the brake 16 and the square anti-falling net 29 to the elevator cannot be too large, therefore, the elevator will break through several square anti-falling nets 29 under the continuous action of the brake 16, and slow down layer by layer under the assistance of the magnetic field. The low floor cannot be completely offset by the brake 16, the square anti-falling net 29 and the magnetic field after breaking through several square anti-falling nets 29 due to too short deceleration distance, but the kinetic energy of the elevator is greatly reduced, and the elevator first falls on the first electromagnet 25 to compress the air bag 24, then compresses the water bag 33 and the polyurethane buffer column 32; the medium and high floors have moderate deceleration distance, so that the brake 16 can be selected to have a slightly larger friction coefficient, and under the premise of ensuring the safety of passengers, the kinetic energy of the elevator is reduced in a short time under the action of the brake 16, the square anti-falling net 29 and the magnetic field; the high floor has a long deceleration distance, and the brake 16 and the magnetic field are used to break through the square anti-falling net 29 of each floor continuously, and finally hover in the elevator shaft, and the data measured by the second distance sensor 43 is used to determine the floor where the elevator is located to perform rescue.

[0051] The flexible elevator anti-falling protection system provided by the application comprises a brake 16, an anti-falling net part, a composite buffer part, a counterweight part and a sensor part, wherein the speed sensor 42 is used to detect whether the running speed of the elevator is abnormal in real time, so as to determine whether a falling event occurs, the second distance sensor 43 and the first distance sensor 36 are used to determine the initial falling height of the elevator, and provide a basis for subsequent selection of the friction coefficient of the brake 16 and the working floor of the square anti-falling net 29, and through cooperation of the brake 16, the anti-falling net part, the composite buffer part, the counterweight part and the sensor part, the elevator obtains a suitable acceleration in the falling process, so that passengers in the elevator can be effectively protected, and the problem that the traditional protection mode is too fast to slow down and the buffer vibration generated by the elevator easily causes harm to passengers in the elevator is solved.

[0052] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specified and limited.

[0053] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover a generalised use of these terms to refer to similar elements independently of any specific order or sequence. Furthermore, these terms can be used interchangeably with each other and can be used with any other of the terms "first", "second", "third", "fourth" and the like wherever it is explicit from the context that such an interpretation is appropriate. The use of any of the terms "first", "second", "third", "fourth" and the like, is neither intended to nor should be construed to limit the scope of the application to related systems or methods merely because the same term is used with respect to related systems or methods as described herein. Accordingly, the words constitute only a selected noun for brevity and only in preference to not repeating the word "unit" or "module" twice. Additionally, the terms "comprising", "having", "including", and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to") unless otherwise noted. Further, any and all permutations of these terms are intended to be controlled by the terms "comprising", "having", "including", and "containing".

[0054] Finally, it should be noted that the above-mentioned embodiments merely illustrate the technical solutions of the present application, instead of limiting the scope of the present application; even though the present application has been described in detail with reference to the above-mentioned embodiments, those ordinarily skilled in the art should understand that they can still modify the technical solutions recorded in the above-mentioned embodiments, or equivalently replace some or all of the technical features thereof; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible elevator fall protection system, characterized in that, The system includes a brake, a fall protection net, a composite buffer, a counterweight, and a sensor. The brake is installed in the machine room and connected to the car frame via a steel cable. The fall protection net is installed at the elevator's stopping position on each floor. The fall protection net includes a square fall protection net fixing frame, a rope winding motor, a traction rope guide seat, a fall protection net traction arm fixing beam, a third electromagnet, a square fall protection net, a fall protection net traction arm, and a traction rope fixing pulley. The square fall protection net fixing frame is fixed to the rear wall of the elevator shaft. Two fall protection net traction arms are fixed to each floor. The lower end of each fall protection net traction arm is rotatably mounted on a mounting base on the rear wall of the elevator shaft, and the upper end of each fall protection net traction arm is fixed to the third electromagnet on the rear wall of the elevator shaft. Three electromagnets are engaged, the anti-fall net traction arm fixing beam is fixed in the elevator shaft and located in front of the car, two traction rope fixing pulleys are symmetrically fixed on each floor, the traction rope fixing pulleys are installed on the side of the anti-fall net traction arm near the elevator shaft, the lower end of the square anti-fall net is connected to the square anti-fall net fixing frame, the upper end of the square anti-fall net is connected to the anti-fall net traction arm, two rope winding motors are symmetrically set on each floor, the rope winding motors and the traction rope guide seats are both fixed on the front wall of the elevator shaft, the traction rope guide seats are located on both sides of the rope winding motors, the lead wires on the rope winding motors pass through the traction rope guide seats and the traction rope fixing pulleys and connect to the holes set at the lower end of the anti-fall net traction arm; The composite buffer section is installed below the elevator shaft, directly opposite the bottom of the car. A second electromagnet is installed at the lower end of the car. The composite buffer section includes a high-pressure air tank and a composite buffer device. The composite buffer device includes an airbag, a first electromagnet, a polyurethane buffer column, and a water bladder. The first electromagnet is fixed to the airbag, and the airbag is fixed to the water bladder. A cylindrical space is provided on the water bladder to accommodate the polyurethane buffer column. The second electromagnet has the opposite magnetic properties to the first electromagnet. Telescopic hydraulic rods are fixedly installed on both sides of the counterweight. Deceleration rubber pads are installed at the ends of the telescopic hydraulic rods. A first distance sensor is installed at the bottom of the counterweight. The sensor section includes a speed sensor and a second distance sensor, which are installed at the bottom of the car.

2. The flexible elevator fall protection system according to claim 1, characterized in that, The square fall protection net has a denser mesh in the middle and a sparser mesh around the edges.

3. The flexible elevator fall protection system according to claim 1 or 2, characterized in that, Retractable car frame guide plates are installed on the left and right sides of the car frame.

4. The flexible elevator fall protection system according to claim 3, characterized in that, The sensor section also includes a first light sensor, which is installed on the elevator car guide rail.

5. The flexible elevator fall protection system according to claim 4, characterized in that, The sensor section also includes a ring-shaped first electromagnetic sensor and a second electromagnetic sensor. The first electromagnetic sensor and the second electromagnetic sensor are fixed on the wall below the machine room. The steel cable for traction elevators passes through the first electromagnetic sensor, and the steel cable for traction elevator counterweights passes through the second electromagnetic sensor.

6. The flexible elevator fall protection system according to claim 5, characterized in that, The sensor section also includes a second light sensor and a third light sensor, which are installed in the machine room and located next to the first and second fixed pulleys used for traction, respectively.

7. The flexible elevator fall protection system according to claim 6, characterized in that, The machine room is equipped with a control cabinet and a power distribution box. The control cabinet is equipped with a controller. A buffer spring is installed on the ground below the elevator counterweight.

Images