Elevator car falling protection device

Abstract

The utility model relates to the technical field of elevator car protection. An elevator car falling protection device comprises an elevator shaft and a car and further comprises a stall detection system, a buffering device is arranged at the bottom of the elevator shaft, a buffering air bag system is arranged above the buffering device, the stall detection system is connected with an ignition device of the buffering air bag system, and a safety air bag system is further arranged in the car. The collision detector is connected with an ignition device of the safety air bag system. Double buffering and protection are provided for an elevator car through a buffering matrix composed of hydraulic buffers and a buffering air bag arranged in an elevator shaft. And at the moment that the lift car collides with the buffer plate finally, the safety air bag in the lift car is ignited and released, so that the impact force of the passengers to the bottom of the lift car is buffered, and the personal safety of the passengers is guaranteed. In addition, an active buffer device and a passive buffer device are arranged in the elevator shaft, the car is slightly changed, the operation cost is saved on the premise that safety is guaranteed, and the social effects of emission reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of elevator car protection, and in particular to an elevator car fall protection device. Background Art

[0002] With the rapid development of urban construction, elevators, especially car elevators running in elevator shafts, as the main means of transportation in high-rise buildings, play an important role in safely and efficiently transporting passengers to the target floor. Their safety issues are receiving more and more attention.

[0003] Although modern elevators have been designed with safety in mind, elevator accidents are still difficult to avoid completely, especially when the elevator car accidentally falls into the pit. Traditional safety protection measures often fail to provide adequate cushioning and protection, which can easily put people in the car in danger. Utility Model Content

[0004] The purpose of the utility model is to provide an elevator car fall protection device to solve the above technical problems.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] The elevator car fall protection device comprises an elevator shaft, a car and a car guide rail, an elevator safety clamp sliding along the guide rail is symmetrically arranged on the outer side of the car, and also comprises a stall detection system for detecting car stall, the stall detection system has a stall signal output interface, and a buffer device is arranged at the bottom of the elevator shaft; the buffer device comprises a buffer plate and a hydraulic buffer; the buffer plate adopts a flat plate; the hydraulic buffer comprises a hydraulic cylinder body and a piston rod, the piston rod extending out of the hydraulic cylinder body is also connected in parallel with a spring member, one end of the spring member abuts against the end of the piston rod, and the other end of the spring member abuts against the hydraulic cylinder body; the hydraulic buffer is arranged at the bottom of the elevator shaft, a buffer plate is connected above the end of the piston rod of the hydraulic buffer, the buffer stroke direction of the piston rod is toward the car, and the buffer plate is horizontal with the bottom of the car;

[0007] A buffer airbag system is also provided in the elevator shaft; the buffer airbag system includes an explosion gas generator and a folding airbag; the explosion gas generator includes a fuel gas mixture and an ignition system, the explosion gas generator is connected to the folding airbag, the explosion gas generator is provided on at least one side of the shaft wall at the lower end of the elevator shaft and is located above the buffer plate, and the gas outlet direction of the explosion gas generator is toward the center of the shaft; the stall signal output interface of the stall detection system is connected to the control signal input end of the ignition system of the explosion gas generator;

[0008] A safety protection airbag system is also provided at the lower end of the inner wall of the car, and the safety protection airbag system includes an explosive gas generator and a folding airbag; the car is provided with a collision detector, and the trigger signal output end of the collision detector is connected to the control signal input end of the ignition system of the safety protection airbag.

[0009] The above design, first, sets a hydraulic buffer with energy absorption and buffering at the bottom of the elevator shaft. The hydraulic buffer has two buffering mechanisms. One is that the spring part is compressed and deformed to absorb energy, which plays a buffering role; the other is that the damping effect of the hydraulic oil in the hydraulic cylinder body reduces the falling speed of the car, which plays a buffering role. The top of the hydraulic buffer is connected to a buffer plate, which itself has the characteristics of flexibility and easy deformation. When the car falls to the buffer plate, the falling force is dispersed by the buffer plate to the hydraulic buffer below it.

[0010] Secondly, a buffer airbag system is also arranged above the buffer device. The function of the buffer airbag system is to buffer the falling speed of the car and protect the safety of the passengers in the car.

[0011] Finally, the car is equipped with an airbag to protect passengers from hitting the floor of the car. The airbag is activated by an explosive gas generator and the ignition system is detonated by a collision detector.

[0012] Those skilled in the art generally believe that an airbag activated by an explosive gas generator is installed in the car, which will cause accidental injuries to passengers in the car when the airbag explodes. Therefore, in the previous scheme of using airbags in the car, the airbag and the passengers are not in direct contact. However, the inventor of the present utility model has overcome the prejudice of the prior art and adopted a different technical scheme. The inventor of the present utility model has verified through experiments that when the car collides with the buffer plate at the bottom of the elevator shaft, the car stops suddenly, while the passenger continues to fall under the action of inertia. The contrast between the two causes the passenger to hit the bottom of the car violently. At this time, if the airbag pops out, the airbag will not bounce the passenger and cause injury. Instead, the appropriate buffering absorbs the impact force of the passenger hitting the bottom of the car, ensuring the personal safety of the passenger.

[0013] Furthermore, the folding airbag of the cushioning airbag system has a structure of three layers from outside to inside, namely nylon cloth, a woven mesh lined with steel wire rope, and nylon cloth, each layer being bonded by vulcanized rubber; the outer nylon cloth is coated with an airtight coating; and the inner nylon cloth is coated with an airtight coating.

[0014] In the utility model, the buffer airbag system acts to intercept the falling of the car. The weight of the car is large, so the kinetic energy when falling is huge, so the airbag for interception and buffering needs to have high strength, and at the same time it must withstand the high temperature of the explosive gas. In this design, the strength core of the folding airbag is a woven mesh woven from steel wire ropes to prevent the airbag from rupturing and losing its buffering effect; vulcanized rubber is used to bond nylon cloth on both sides of the woven mesh to play a role in waterproofing, anti-corrosion and anti-leakage; the outer side of the nylon cloth is coated with an airtight coating to further play a role in sealing and preventing air leakage. Sealing and preventing air leakage can have good buffering energy absorption efficiency.

[0015] Furthermore, the folding airbag of the safety protection airbag system includes nylon cloth, and the inner and outer surfaces of the nylon cloth are coated with airtight coatings.

[0016] In the utility model, the safety protection airbag system acts on the passengers, so there is no woven mesh made of steel wire ropes in the airbag structure, and only a structure with nylon cloth coated with an airtight coating is adopted. Since this structure has no woven mesh, it has good flexibility and high safety for the passengers. Under the action of the airtight coating layer, the sealed gas has an efficient buffering effect on the impact force of the passenger hitting the car.

[0017] Furthermore, the airtight coating is made of at least one of chloroprene rubber and silicone.

[0018] In the utility model, chloroprene rubber or organic silicon is used as the material of the airtight coating, which has the effects of good airtightness, flexibility, high adhesion of the coating, water resistance and corrosion resistance.

[0019] Furthermore, the hydraulic buffer is arranged in a matrix of at least 2*2 at the bottom of the elevator shaft corresponding to the projection area of ​​the car.

[0020] In the utility model, hydraulic buffers are used to form a buffer matrix at the bottom of the elevator shaft. The impact points of the car's fall are distributed to multiple hydraulic buffers through buffer plates, which further enhances the impact force when the car falls, more safely protects the lives of passengers in the car, and reduces personal injuries.

[0021] Furthermore, the collision detector adopts at least one of an eccentric hammer collision sensor, a rolling ball collision sensor, a roller collision sensor, and a resistance strain gauge collision sensor.

[0022] In the utility model, the collision detector adopts the above-mentioned collision sensor, which can grasp the timing of the collision moment and activate the buffer airbag at the moment of impact.

[0023] Furthermore, the collision detector adopts a piezoelectric collision sensor, which includes a conduction rod for conducting the impact force to the piezoelectric crystal, and the end of the conduction rod protrudes from the outer bottom surface of the car, toward the direction of the buffer plate.

[0024] In the present invention, the piezoelectric collision sensor is also a good technical solution, but due to the limitation of the working mechanism, this type of collision sensor needs to set the conductive rod that guides the collision at a position facing the buffer plate at the bottom of the well. This type of collision sensor detects collision more reliably and has a lower chance of false alarm.

[0025] The utility model firstly arranges a buffer matrix composed of hydraulic buffers at the bottom of the elevator shaft. The hydraulic buffer itself is a buffer with oil damping buffer and spring compression buffer. A buffer plate is also arranged above the matrix. The impact of the falling car is dispersed to multiple hydraulic buffers through the buffer plate, which can effectively buffer the impact force and improve the buffering effect; secondly, an airbag system for intercepting the buffer car is also arranged above the hydraulic buffer matrix. Before the falling car hits the buffer plate, the airbag is used to perform a soft buffering of high-pressure gas, thereby improving the buffering and deceleration effect of the car; finally, a safety airbag system for passengers is also arranged in the car. After being buffered by the shaft airbag, the moment the car hits the buffer plate, the safety airbag in the car is ignited and released, thereby buffering the impact force of the passenger hitting the bottom of the car and ensuring the personal safety of the passengers.

[0026] Its beneficial effect also lies in that the present application implements active and passive buffer devices in the elevator shaft, with minimal changes to the car, thus not increasing the weight of the car, and further not increasing the electricity consumption in daily operations, saving operating costs while ensuring safety, and achieving the social effect of reducing emissions and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0028] Figure 1 It is a front view of the utility model;

[0029] Figure 2 It is a schematic diagram of the hydraulic buffer matrix;

[0030] Figure 3 It is a schematic diagram of a hydraulic buffer;

[0031] Figure 4 It is a schematic diagram of the airbag structure.

[0032] Explanation of symbols:

[0033] 1. Elevator shaft; 2. Car; 3. Car guide rail; 4. Elevator safety clamp; 5. Stall detection system; 6. Folding airbag; 7. Gas mixture; 8. Ignition system; 9. Safety protection airbag system; 10. Collision detector; 11. Buffer plate; 12. Hydraulic buffer; 61. Nylon cloth; 62. Braided mesh; 63. Vulcanized rubber; 64. Airtight coating; 121. Hydraulic cylinder; 122. Piston rod; 123. Piston rod end; 124. Spring part. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0037] Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Reference Figure 1 , Figure 3As shown, the elevator car fall protection device includes an elevator shaft 1, a car 2 and a car guide rail 3, an elevator safety clamp 4 sliding along the guide rail is symmetrically arranged on the outer side of the car 2, and also includes a stall detection system 5 for detecting the stall of the car 2, the stall detection system 5 has a stall signal output interface, and a buffer device is arranged at the bottom of the elevator shaft 1; the buffer device includes a buffer plate 11 and a hydraulic buffer 12; the buffer plate 11 adopts a flat plate; the hydraulic buffer 12 includes a hydraulic cylinder body 121 and a piston rod 122, the piston rod 122 extending out of the hydraulic cylinder body 121 is also connected in parallel with a spring member 124, one end of the spring member 124 is against the piston rod end 123, and the other end of the spring member 124 is against the hydraulic cylinder body 121; the hydraulic buffer 12 is arranged at the bottom of the elevator shaft 1, and the buffer plate 11 is connected above the piston rod end 123 of the hydraulic buffer 12, the buffer stroke direction of the piston rod 122 is toward the car 2, and the buffer plate 11 is horizontal with the bottom of the car 2;

[0039] A buffer airbag system is also provided in the elevator shaft 1; the buffer airbag system includes an explosion gas generator and a folding airbag 6; the explosion gas generator includes a fuel gas mixture 7 and an ignition system 8, the explosion gas generator is connected to the folding airbag 6, the explosion gas generator is provided on at least one side of the shaft wall at the lower end of the elevator shaft 1 and is located above the buffer plate 11, and the gas outlet direction of the explosion gas generator is toward the center of the shaft; the stall signal output interface of the stall detection system 5 is connected to the control signal input end of the ignition system 8 of the explosion gas generator;

[0040] A safety protection airbag system 9 is also provided at the lower end of the inner wall of the car 2, and the safety protection airbag system 9 includes an explosive gas generator and a folding airbag 6; the car 2 is provided with a collision detector 10, and the trigger signal output end of the collision detector 10 is connected to the control signal input end of the ignition system 8 of the safety protection airbag.

[0041] In the above design, first, a hydraulic buffer 12 with energy absorption and buffering is arranged at the bottom of the elevator shaft 1. The hydraulic buffer 12 has two buffering mechanisms. One is that the spring member 124 is compressed and deformed to absorb energy, which plays a buffering role; the other is that the damping effect of the hydraulic oil in the hydraulic cylinder 121 mitigates the falling speed of the car 2, which plays a buffering role. The top of the hydraulic buffer 12 is connected to a buffer plate 11, which itself has the characteristics of flexibility and easy deformation. When the car 2 falls to the buffer plate 11, the falling force is dispersed by the buffer plate 11 to the hydraulic buffer 12 below it.

[0042] Secondly, a buffer airbag system is also arranged above the buffer device. The function of the buffer airbag system is to buffer the falling speed of the car 2 and protect the safety of the passengers in the car 2.

[0043] Finally, a safety airbag is also provided in the car 2 to protect passengers from hitting the bottom of the car 2. The safety airbag is activated by an explosive gas generator, and the collision detector 10 detonates the ignition system 8.

[0044] Those skilled in the art generally believe that an airbag activated by an explosive gas generator is provided in the car 2, which will cause accidental injury to passengers in the car 2 when the airbag explodes. Therefore, in the previous scheme of using airbags in the car 2, the airbag and the passengers are not in direct contact. However, the inventor of the present utility model has overcome the prejudice of the prior art and adopted a different technical scheme. The inventor of the present utility model has verified through experiments that when the car 2 collides with the buffer plate 11 at the bottom of the elevator shaft 1, the car 2 stops suddenly, while the passenger continues to fall under the action of inertia. The contrast between the two causes the passenger to violently hit the bottom of the car 2. At this time, if the airbag pops out, the airbag will not bounce the passenger and cause injury. Instead, the appropriate buffering absorbs the impact force of the passenger hitting the bottom of the car, thereby ensuring the personal safety of the passenger.

[0045] Reference Figure 4 As shown, the folding airbag 6 of the cushioning airbag system has a structure of three layers from outside to inside, namely, nylon cloth 61, a woven mesh lined with steel wire rope 62, and nylon cloth 61, each layer is bonded by vulcanized rubber 63; the outer nylon cloth 61 is coated with an airtight coating 64; the inner nylon cloth 61 is coated with an airtight coating 64.

[0046] In this embodiment, the buffer airbag system acts to intercept the falling of the car 2. The weight of the car 2 is large, so the kinetic energy when falling is huge, so the airbag for interception and buffering needs to have high strength and withstand the high temperature of the explosive gas. In this design, the strength core of the folding airbag 6 is a woven mesh 62 woven from steel wire ropes to prevent the airbag from rupturing and losing its buffering effect; vulcanized rubber 63 is used to glue and bond nylon cloth 61 on both sides of the woven mesh 62 to play a role in waterproofing, anti-corrosion and anti-leakage; the outer side of the nylon cloth 61 is coated with an airtight coating 64 to further play a role in sealing and preventing air leakage. Sealing and preventing air leakage can have good buffering energy absorption efficiency.

[0047] The folding airbag 6 of the safety protection airbag system 9 includes a nylon cloth 61 , and the inner and outer surfaces of the nylon cloth 61 are coated with an airtight coating 64 .

[0048] In this embodiment, the safety protection airbag system 9 acts on the passengers, so there is no woven mesh 62 made of woven steel wire ropes in the airbag structure, and only a structure of nylon cloth 61 coated with an airtight coating 64 is used. Because this structure does not have the woven mesh 62, it has good flexibility and high safety for the passengers. Under the action of the airtight coating layer, the sealed gas has an efficient buffering effect on the impact force of the passenger hitting the car 2.

[0049] The airtight coating 64 is made of at least one of chloroprene rubber and silicone.

[0050] In this embodiment, chloroprene rubber or silicone is used as the material of the airtight coating 64, which has the advantages of good airtightness, flexibility, high adhesion of the coating, water resistance and corrosion resistance.

[0051] Reference Figure 2 As shown, the hydraulic buffer 12 is arranged in a matrix of at least 2*2 at the bottom of the elevator shaft 1 corresponding to the projection area of ​​the car 2.

[0052] In this embodiment, hydraulic buffers 12 are used to form a buffer matrix at the bottom of the elevator shaft 1. The impact points of the car 2 falling are distributed to multiple hydraulic buffers 12 through the buffer plates 11, further enhancing the impact force of the car 2 when it falls, more safely protecting the lives of passengers in the car 2 and reducing personal injuries.

[0053] The collision detector 10 adopts at least one of an eccentric hammer collision sensor, a rolling ball collision sensor, a roller collision sensor, and a resistance strain gauge collision sensor.

[0054] In this embodiment, the collision detector 10 uses the above-mentioned collision sensor to grasp the timing of the collision and activate the buffer airbag at the moment of impact. To ensure the reliability of the collision detector 10, the collision detector 10 is set at a distance of no more than 0.5m from the safety protection airbag system 9.

[0055] The collision detector 10 adopts a piezoelectric collision sensor, which includes a conductive rod for transmitting the impact force to the piezoelectric crystal, and the end of the conductive rod protrudes from the outer bottom surface of the car 2 toward the direction of the buffer plate 11.

[0056] In this embodiment, the piezoelectric collision sensor is also a good technical solution, but due to the limitation of the working mechanism, this type of collision sensor needs to set the conductive rod for guiding the collision at a position facing the buffer plate 11 at the bottom of the well. This type of collision sensor detects collision more reliably and has a lower probability of false alarm.

[0057] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described, ie, those features that are not relevant to the best mode of the invention or those features that are not relevant to implementing the invention.

[0058] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An elevator car fall protection device, comprising an elevator shaft, a car and a car guide rail, an elevator safety clamp sliding along the guide rail is symmetrically arranged on the outside of the car, and also comprises a stall detection system for detecting car stall, the stall detection system has a stall signal output interface, and is characterized in that: A buffer device is provided at the bottom of the elevator shaft; The buffer device includes a buffer plate and a hydraulic buffer; The buffer plate is a flat plate; The hydraulic buffer comprises a hydraulic cylinder body and a piston rod. The piston rod extending out of the hydraulic cylinder body is also connected in parallel with a spring member, one end of the spring member abuts against the end of the piston rod, and the other end of the spring member abuts against the hydraulic cylinder body. The hydraulic cylinder of the hydraulic buffer is arranged at the bottom of the elevator shaft, a buffer plate is connected above the end of the piston rod of the hydraulic buffer, the buffer stroke direction of the piston rod is toward the car, and the buffer plate is horizontal with the bottom of the car; A cushioning airbag system is also provided in the elevator shaft; The cushioning airbag system includes an explosive gas generator and a folding airbag; The explosion gas generator includes a fuel gas mixture and an ignition system. The explosion gas generator is connected to the folding airbag. The explosion gas generator is arranged on at least one side of the shaft wall at the lower end of the elevator shaft and is located above the buffer plate. The gas outlet direction of the explosion gas generator is toward the center of the shaft. The stall signal output interface of the stall detection system is connected to the control signal input end of the ignition system of the explosion gas generator; A safety protection airbag system is also provided at the lower end of the inner wall of the car, and the safety protection airbag system includes an explosive gas generator and a folding airbag; The car is provided with a collision detector, and a trigger signal output end of the collision detector is connected to a control signal input end of an ignition system of a safety protection airbag.

2. The elevator car fall protection device according to claim 1, characterized in that: The folding airbag of the cushioning airbag system has a structure of three layers from outside to inside, namely, nylon cloth, a braided net lined with steel wire ropes, and nylon cloth, each layer being bonded by vulcanized rubber; The outer nylon cloth is coated with an airtight coating; The inner nylon cloth is coated with an airtight coating.

3. The elevator car fall protection device according to claim 1, characterized in that: The folding airbag of the safety protection airbag system comprises nylon cloth, and the inner and outer surfaces of the nylon cloth are coated with airtight coatings.

4. The elevator car fall protection device according to claim 2 or 3, characterized in that: The airtight coating is made of at least one of chloroprene rubber and silicone.

5. The elevator car fall protection device according to claim 1, characterized in that: The hydraulic buffer is arranged in a matrix of at least 2*2 at the bottom of the elevator shaft corresponding to the projection area of ​​the car.

6. The elevator car fall protection device according to claim 1, characterized in that: The collision detector adopts at least one of an eccentric hammer type collision sensor, a rolling ball type collision sensor, a roller type collision sensor, and a resistance strain gauge type collision sensor.

7. The elevator car fall protection device according to claim 1, characterized in that: The collision detector adopts a piezoelectric collision sensor, which includes a conduction rod for conducting the impact force to the piezoelectric crystal, and the end of the conduction rod protrudes from the outer bottom surface of the car and faces the direction of the buffer plate.

Images