CN201952080U

CN201952080U - Elevator safety system based on safety airbag system

Info

Publication number: CN201952080U
Application number: CN2011200890560U
Authority: CN
Inventors: 王凌云; 邱永荣; 陶巍; 洪雪华; 邹建男; 孙道恒
Original assignee: Xiamen University
Current assignee: Xiamen University
Priority date: 2011-03-30
Filing date: 2011-03-30
Publication date: 2011-08-31
Anticipated expiration: 2021-03-30

Abstract

An elevator safety system based on a safety airbag system relates to elevators and is high in safety factor of an elevator. The elevator safety system is provided with a sensor assembly, a first buffer airbag, a first air generator, a second buffer airbag, a second air generator and a control unit, wherein the sensor assembly is mounted on the top of an elevator cabin, the first buffer airbag and the first air generator are mounted at the bottom of the elevator cabin, the second buffer airbag and the second air generator are mounted on the top of the elevator cabin, and the control unit is mounted in a control cabinet of the elevator. The elevator directly rushes to the top or falls down when end stands of the elevator is in failure of deceleration or an end stand monitor is out of work, another safety defense is added besides buffers, passengers can be further protected actively due to the fact that the buffer airbags can effectively absorb collision energy during collision, and accordingly safety factor of the elevator is effectively improved.

Description

A kind of elevator safety system based on air bag system

Technical field

The utility model relates to elevator, particularly relates to a kind of elevator safety system based on air bag system.

Background technology

The safety system of existing elevator is made of velocity limiter, safety tongs, energy disperser, end station fender guard etc.Velocity limiter and safety tongs be as elevator overspeed or the interlock fender guard when out of control, and the former is for speed responsing and trigger the device of safety tongs, and the latter then is with the elevator mechanism of stop on guide rail by force with mechanical action.For the velocity limiter that is provided with overspeed switch (non-automatic resetting), overspeed switch (first responsiveness) at first moves, cut off elevator safety loop or control loop and make the braking of magnet stopper dead electricity, if elevator continues to quicken operation downwards, velocity limiter and then block steel rope then, mention safety tongs interlock tie-bar, force the safety tongs action, with elevator by force stop on guide rail.For the velocity limiter that does not have overspeed switch, only force the function of safety tongs action, the safety tongs switch on the car entablatrance is disconnected simultaneously, cuts off safety return circuit.Safety tongs mainly is made up of connecting rod mechanism, pincers piece pull bar, pincers piece and pincers seat etc., when car or counterweight move downward, skid, disconnected rope, out of control etc. and occur under the downward situation of hypervelocity, produce interlock with velocity limiter, pull bar is raised, make safety tongs carve piece or ball etc. and produce rising or parallel motion, make the outage of towing machine and drg simultaneously, car is slowed down and by the safety tongs stop on guide rail.Car cross sill two ends respectively is provided with a safety tongs, and counterweight generally is not provided with safety tongs, but when (when having building that the people can reach or space to exist as hoistway below) under special circumstances, then counterweight safety must be set.End station fender guard is one group and prevents that elevator from surmounting the switch at upper and lower end station or forcing the throw-over device, can cut off control loop or general supply before car or counterweight are run into energy disperser, makes the elevator safety stop.

Energy disperser is last one safety guard of elevator, and when elevator is out of control when rushing to summit or squatting the end, energy disperser will absorb and consume the impact energy of elevator, and energy disperser is installed in the pit of hoistway, and car and counterweight respectively are furnished with 1～2.Elevator mainly uses two kinds of energy dispersers, and a kind of is that spring buffer is a spring bumper; Another kind is that hydraulic buffer is a water bumper, is applicable to any elevator.The principle of work of spring bumper is, after being impacted, with self distortion the kinetic energy of elevator is converted into the elastic deformation energy of spring, makes elevator obtain buffering.The principle of work of water bumper is, when car or counterweight cushion at collision, plunger moves downward, and the oil in the compression cylinder passes to hydraulic oil with the kinetic energy of elevator, make hydraulic oil spray to plunger cavity by the cutoff port that goes in ring, when hydraulic oil passes through to go in ring cutoff port,, form eddy current because flow area dwindles suddenly, make particle in the liquid collide mutually, rub and produce heat the impact kinetic energy of elevator is consumed, thereby guarantee elevator safety failure-free ramp to stop.

Generally, energy disperser is general in pit installs 3, and counterweight frame is installed one down, and car frame is installed two down.Spring bumper owing to its mechanical strength and water bumper owing to reasons such as its structures; they are as last one safety device on the elevator end position; when elevator since accidental cause elevator end station do not slow down or hold that the control monitor unit of standing is malfunctioning to cause elevator directly to be rushed to summit or when squatting the end; when particularly high rise elevator is squatted the end; present safety system does not play gratifying protective effect; this life security to the people that takes elevator has caused certain threat, and the elevator death incident that the end causes of squatting happens occasionally.Nowadays economic develop rapidly, high buildings and large mansions are found everywhere, and the consumption of elevator is well imagined, has brought no small psychological burden but elevator brings people's sense of insecurity to the passenger-in-elevator.Therefore, must further improve the safety factor of elevator, take some life securities of effective measures protection passenger-in-elevator more, alleviate the psychological burden of passenger-in-elevator when taking elevator.

Safety air bag is product that technology content is very high in the automotive safety, and its protection effect generally is familiar with by people.According to statistics, when auto against, air bag can make the occupant's head injury rate reduce 25%, facial injury rate minimizing about 80% (Lv Feng. the correct use [J] of air bag system. car electrics, 2005,3:45～46).Along with development of science and technology, the air bag system price is also more and more lower, and engineering factor is increasingly mature simultaneously, and air bag system has been had ready conditions and applied to elevator.

Summary of the invention

The purpose of this utility model provides a kind of elevator safety system based on air bag system that improves the elevator safety coefficient.

The utility model is provided with sensor unit, the 1st buffer air bag, the 1st gas generator, the 2nd buffer air bag, the 2nd gas generator and controll block; Sensor unit is installed on the car roof, and the 1st buffer air bag and the 1st gas generator are installed at the bottom of the car, and the 2nd buffer air bag and the 2nd gas generator are installed in car roof, and controll block is installed in the control housing of elevator.

Compare with existing elevator safety measure; outstanding feature of the present utility model is: when elevator since accidental cause elevator end station do not slow down or hold that the control monitor unit of standing is malfunctioning to cause elevator directly to be rushed to summit or when squatting the end; except the protection of energy disperser; increased the safety guard-safeguard defence line again one; thereby because buffer air bag can effectively absorb collision energy in collision the occupant is played further initiatively protective effect, therefore improved the safety factor of elevator effectively.

Description of drawings

Fig. 1 is that the structure of the utility model embodiment is formed scheme drawing.

Car situation scheme drawing when Fig. 2 is the buffer air bag unlatching that lift car pushes up among the utility model embodiment.

Fig. 3 is the running condition scheme drawing of the utility model embodiment.

The specific embodiment

Referring to Fig. 1～3, the utility model embodiment is provided with sensor unit the 6, the 1st buffer air bag the 112, the 1st gas generator, the 2nd buffer air bag the 111, the 2nd gas generator 7 and controll block 2; Sensor unit 6 is installed on the car roof 8, and the 1st buffer air bag 112 and the 1st gas generator are installed in that 10, the 2 buffer air bags 111 and the 2nd gas generator 7 are installed in car roof 8 at the bottom of the car, and controll block 2 is installed in the elevator control cabinet 1.

When elevator was worked, the sensor unit 6 of air bag system constantly sent elevator speed direction and acceleration informations to controll block 2, by controll block 2 to these information analysis and judgement in addition.When the elevator speed direction makes progress; if downward accekeration is greater than predetermined crash acceleration value; be elevator because accidental cause causes rushing to summit and collides with well headroom; perhaps when elevator speed is directed downwards; if downward accekeration surpasses the schedule time greater than the time of the specified maximum acceleration value of elevator; be that the end of squatting takes place elevator; then controll block 2 is sent ignition order or the igniting of sensor unit 6 direct controls to gas generator; the gas that produces is full of buffer air bag, thereby reaches protection occupant's purpose.

When elevator bumps owing to rushing to summit and with well headroom; the downward accekeration of elevator is greater than predetermined crash acceleration value; controll block is sent ignition order or is positioned at the sensor unit 6 direct controls igniting of car roof 8 to the 2nd gas generator 7 that is positioned at car roof 8; (approximately 30ms) produces the 2nd buffer air bag 7 that a large amount of gases are full of car roof in a short period of time; the occupant is because inertia can be to upper punch; bump against the 2nd buffer air bag 111; the 2nd buffer air bag 111 absorbs collision energy by the damping of being located at the deflation hole on the 2nd buffer air bag 111, thereby reaches protection occupant's purpose.

When the end, take place to squat in elevator, the time that the downward accekeration of elevator is set maximum acceleration value greater than elevator surpasses the schedule time, controll block the 1st gas generator of 10 at the bottom of being positioned at car sends ignition order or the igniting of sensor unit 6 direct controls, (approximately 30ms) produces a large amount of gases and is full of at the bottom of the car 10 the 1st buffer air bag 112 in a short period of time, since this 1st buffer air bag 112 be mounted in 10 the superiors at the bottom of the car plastic plate 9 below, so the 1st buffer air bag 112 can jack-up plastic plates 9.When elevator bumps against the energy disperser 4 of pit; the occupant is because inertia can produce very big downward impulsive force to plastic plate 9; this impulsive force passes to the 1st buffer air bag 112; the damping by deflation hole after being subjected to this impulsive force of the 1st buffer air bag 112 absorbs collision energy, thereby reaches the purpose of initiatively protecting the occupant.In order to prevent plastic plate 9 owing to be subjected to occupant's pressure inhomogeneous and situation that perk is too severe connects plastic plates 9 and the steel plates below it with at least 4 flexible strand 12 around plastic plate 9.

In Fig. 3, other is labeled as counterweight 3, energy disperser 4, car 5.

Claims

1. the elevator safety system based on air bag system is characterized in that being provided with sensor unit, the 1st buffer air bag, the 1st gas generator, the 2nd buffer air bag, the 2nd gas generator and controll block; Sensor unit is installed on the car roof, and the 1st buffer air bag and the 1st gas generator are installed at the bottom of the car, and the 2nd buffer air bag and the 2nd gas generator are installed in car roof, and controll block is installed in the control housing of elevator.