Fully mechanical emergency self-rescue system and device for hydraulic elevators

Abstract

This invention involves a mechanical lever that can move the elevator cabin manually and with no electricity for fascilitated emergency rescue in a blackout. It comprises assembled mechanical parts including a manual lever, connecting and sheathed cables, a pulley unit, tow wire connection brackets, the main elevator rail, elevator solenoid valve, return auxiliary spring, oil tank, emergency manual valve lever, and leveling sensor. A manual release lever is installed in the upper part of the elevator cabin and connected to the sheathed tow wire. Any person trapped inside the cabin can pull the lever and open the manual release valve located in the elevator engine room, to drain the oil and move the elevator cabin in order to reach the nearest floor and exit.

Description

Fully Mechanical Emergency Self-Rescue System and Device for Hydraulic Elevators

[0001] This claimed invention presents a fully mechanical emergency system that can be installed on hydraulic elevators of any size and operate without any need for batteries or electricity. Moreover, there is no need for the presence of an expert operator and anyone trapped inside the cabin in case of a blackout or malfunction can easily use this system to exit safely. The invention includes a manual lever installed on the upper part of the cabin, connecting tow wires and a manual release valve. Once the lever is pulled, the traction force is transferred to the vertical pulley unit, opens the emergency valve and releases the oil. Then the cabin can be moved mechanically and reach the floor level so that the person can get out. The instructions are clear and can be followed in the event of any emergency that might lead to people being trapped inside the elevator. The system can be added to a variety of elevators of any height.

[0002] B66B9 / 04 – B66B5 / 02

[0003] CN104444678

[0004] ELEVATOR SAFETY AND SYNCHRONOUS SELF-RESCUE DEVICE

[0005] The invention provides an elevator safety and synchronous self-rescue device. The elevator safety and synchronous self-rescue device is characterized by comprising an elevator car synchronizer, a self-rescue device and a synchronous detecting device, wherein the elevator car synchronizer is connected with an elevator car through a rack on a lifting guide rail; the self-rescue device is connected with the elevator car synchronizer through a clutch; and one end of the synchronous detecting device is connected with the elevator car, and the other end is connected with a fixed part of the elevator car synchronizer. The synchronous operation of the elevator safety and synchronous self-rescue device and the elevator car is realized; the elevator car is accurately positioned; persons trapped in an elevator can realize self rescue through manually driving the elevator to a safety position or an exit under the condition of not damaging the elevator car on occasions of power failure, rupture of an elevator lifting rope or other elevator faults; and meanwhile, the operation stability of the lifting rope of the elevator car can be judged to a certain extent. The elevator safety and synchronous self-rescue device is high in efficiency and small in time consumption, saves the manpower, the material resources and the financial resources, timely rescues persons trapped in the elevator, and guarantees the safety of the trapped persons.

[0006] This mentioned invention involves a manual self-rescue device with a similar function as our claimed system, however the componants and method are different. For instance, this device uses a servo motor and turbine worm while ours features a pulley unit and mechanical lever with tow wire connections.

[0007] CN102259782

[0008] SELF-RESCUE SYSTEM AND METHOD FOR HYDRAULIC ELEVATOR

[0009] The invention provides a self-rescue system for a hydraulic elevator. The self-rescue system comprises a car call control unit, a main control unit, a hydraulic pump control unit and a direct-current (DC) power supply for supplying electricity to the self-rescue system for the hydraulic elevator, wherein, the car call control unit is connected with the main control unit through a cable; the car call control unit comprises a car call panel and a car call control main board; the car call panel is equipped with a self-rescue switch, and the self-rescue switch is connected with the car call control main board through a circuit; and the main control unit is connected with the hydraulic pump control unit through a circuit. The self-rescue system and method for the hydraulic elevator have the beneficial effects that passengers can get out of a car so as to achieve the self-rescue purpose by taking simple and easy measures, and the rescue cost is lowered.

[0010] This invention resembles our design in that they both operate on hydraulic elevators and offer self-rescue methods, however this system, like many other prior art, needs a power supply source to operate while our method is fully mechanical and does not need batteries or electricity.

[0011] CN110510470

[0012] ELEVATOR RESCUE DEVICE

[0013] The invention relates to an elevator rescue device. Self-rescue is achieved by hiding a ladder climbing device in a ceiling on the top of an elevator car. The rescue device mainly comprises a winch, atelescopic ladder and an escape window. The winch operates and drives a steel wire rope extending out of the winch, one end of the ladder can be put down by guide wheels and a crown block on the telescopic ladder, a retraction ladder in the telescopic ladder extends out, passengers can climb to the escape window via the ladder and escape from the escape window, and self-rescue is achieved. The rescue device is simple to operate, the passengers can be self-saved in the first time, casualties are avoided, and personal safety of the elevator passengers is guaranteed.

[0014] This mentioned device also offers a self-rescue method and does not need power, however, it relies primarily on the use of a ladder, a wimch and an escape window. On the other hand, our design does not require the passenger to climb and is relatively easier to operate. Moreover, our system features level recognition sensors and an accessible lever that moves the cabin to nearest floor, with no need for climbing or an escape hatch.

[0015] CN109665401

[0016] ELEVATOR EMERGENCY RESCUE AGENCY

[0017] The invention discloses an elevator emergency rescue mechanism. The elevator emergency rescue mechanism comprises a traction machine unlocking device, a worm wheel, a worm and a rescue system, when atraction machine is powered off, the traction machine unlocking device acts, thereby causing an electromagnetic braking mechanism of the traction machine to release the braking of the traction machinethrough a digging rope; the worm wheel is coaxially connected to a traction wheel; the worm is meshed with the worm wheel to form a locking mechanism of the traction wheel; the rescue system comprises a driving element which can drive the worm to rotate, and an emergency power supply for supplying power to the driving element; when an elevator is in normal operation, the rescue system keeps the speed ratio of the worm to the worm wheel synchronized with the transmission ratio of the worm to the worm wheel; when the rescue is needed, the rescue system depends on the emergency power supply to rotate the worm, and thus, the traction wheel is driven to rotate through the worm wheel, the lift car approaches to the level to achieve the self-help rescue for passengers. The elevator emergency rescue mechanism can realize the self-help rescue of the passengers, can effectively reduce the maintenance cost of the rescue system, and can greatly improve the safety of the elevator in the event of abnormal conditions such as power failure.

[0018] This mentioned system is very similar to our slaimed patent in their efficient rescue operation but this device depends on an emergency power supply whereas our system is completely mechanical and can work in complete blackout with no battery or power source.

[0019] CN109319624

[0020] STRUCTURE FOR SELF-RESCUE THROUGH FORCIBLE OPENING OF ELEVATOR DOOR

[0021] The invention provides a structure for self-rescue through forcible opening of an elevator door, and belongs to the technical field of elevator equipment. According to the structure, the technical problem that self-rescue of passengers can not be achieved when a blackout accident caused by a natural disaster occurs in existing elevator equipment is solved. Landing doors of the structure for self-rescue through forcible opening of the elevator door are provided with sliding rods, and the sliding rods are provided with permanent magnets; the landing doors are further provided with electromagnetswhich can be repellent to the permanent magnets for controlling the axial positions of the sliding rods; and gate balls are deflected and act with movable plates for achieving unlocking when the sliding rods are slid axially under the effect of spring during outage. According to the structure, the self-rescue of the passengers can be achieved after outage of an elevator, and the safety performance of the elevator is improved.

[0022] Similar to our claimed system, this mentioned structure is functional during power outage, however, it focuses on opening the cabin doors using rods and magnets, with no provision for exiting the shaft while ours safely guides the cabin to the nearest floor using the mechanical lever.

[0023] CN214031333

[0024] ELEVATOR WITH SELF-HELP RESCUE DEVICE

[0025] The elevator comprises a self-rescue cabinet, the self-rescue cabinet is arranged at the position, close to the rear portion, of the top of a lift car wall of the elevator, an opening is formed in the upper end of the self-rescue cabinet, and an oxygen tank, a medical first-aid box and a food supply box are arranged in the self-rescue cabinet. A set of pulleys are arranged in the car wall of the elevator, a pair of ropes is wound in the pulleys, one ends of the ropes are connected with the two ends of the top of the self-rescue cabinet, and the other ends of the ropes are located in the side wall of the car wall of the elevator. The elevator with the self-help rescue device is simple in structure, convenient to use and high in safety.

[0026] This mentioned invention involves a self-help kit that keep the passenger while the rescue personnel arrive, and is different from our completely mechanical system that does not require an emergency crew or any expertise, and the passengers can exit on their own.

[0027] CN211169387

[0028] ELEVATOR SELF-RESCUE ESCAPE DEVICE

[0029] The utility model relates to a self-rescue escape device of an elevator. The elevator escape device comprises an embedded escape ladder, an escape window arranged at the top end of an elevator car, aplurality of layers of through holes formed in the wall body of the elevator car, a bearing embedded in the wall body of the elevator car, and a ball screw mechanism used for controlling each layer ofstep of the embedded escape ladder to extend into or move out of the elevator car along the through holes, the ball screw mechanism comprises a lead screw, a ball screw nut connected with the lead screw in a threaded fit mode, and a grip fixed to the ball screw nut. Wherein the grip is arranged in an elevator car, a bearing is arranged in a panel of the elevator car, an outer ring of the bearingis fixed or embedded in the panel of the elevator car, and an inner ring of the bearing is fixedly connected with the ball screw nut. After the structure is adopted, the elevator self-rescue escape device has the beneficial effects that the structure is simple, the cost is low, the control is convenient, and trapped people can realize self-rescue by adopting the elevator self-rescue escape device.

[0030] This mentioned invention resembles our system in their manual operation and componants such as pulley units. However, this device relies on the use of an escape window and a ladder that the passenger has to climb to safety, whereas our method features a mechanical lever that moves the cabin to nearest floor and eliminates the need for climbing.

[0031] The innovation includes a completely mechanical emergency rescue system that needs no electricity or battery and can be used by any individual stuck in an elevator cabin during a power outage or breakdown. By pulling the lever installed above the cabin by the individual trapped within the lift, the traction force is transferred through the sheathed tow wire to the pulley unit imbedded within the upper part of the cabin. This pressure causes bending and extending within the lower portion of the connecting tow wire through the turn of the vertical pulley unit. This tension ultimately leads to the opening of the emergency manual release valve placed in the engine room, and depleting the oil so that the cabin moves and reaches the closest floor and the individual can exit safely. This system can be integrated into hydraulic industrial or passenger elevators of any height and offer a fully mechanical, secure emergency measure that can be operated by anyone.

[0032] One of the main issues that occur when using existing elevator systems is the risk of being stuck inside the cabin during a power outage or malfunction. In recent years, mechanical and electrical emergency rescue systems have been designed and built to solve this problem. In the existing mechanical methods, the presence of a competent trained person in the building is required to execute the rescue instructions. Moreover, existing intelligent electronic emergency rescue systems only work in times of power outages and do not work when the city electricity is connected and the elevator breaks down. In addition, provided the batteries are charged and working, they will perform properly. In these systems, the presence of an operator in the engine room is necessary to move the elevator by cutting off the main power of the elevator and turning the gearbox or opening the hydraulic hand valve and lead to the exit of the passengers on the floors. These limitations mainly make rescue operations difficult, time-consuming and require specialized firefighting teams. While the presented fully mechanical emergency rescue system omits the need for experts and non-experts outside the cabin during power outages and even elevator failure, and can be used by anyone inside the cabin.Solution of Problem

[0033] The claimed system includes a mechanism that operates using assembled mechanical parts including a manual lever, connecting and sheathed cables, a pulley unit, tow wire connection brackets, the main elevator rail, elevator solenoid valve, return auxiliary spring, oil tank, emergency manual valve lever, and leveling sensor or tachogenerators . This system provides mechanical connections between floors, as well as connections between inside the cabin and the engine room of hydraulic elevators at any height.

[0034] A manual release lever is installed in the upper part of the elevator cabin and connected to the sheathed tow wire. Once the lever is pulled, tension is transferred to the pulley unit mounted on top of the cabin and subsequently to the connecting tow wire.

[0035] Depending on the location of the engine room, the connecting tow wire is fixed from the upper or lower end. Therefore, the traction force is transferred through the rotation of the pulleys and the tension of the tow wire in the pulley unit to the sheathed tow wire and into the engine room and the emergency manual valve lever. It then causes the manual valve to open and the jack oil to return to the tank, so the elevator cabin starts to move and stops after reaching the floor level, through the floor recognition sensor or tachogenerators, which is installed behind the main rail like a bracket, and causes the unit pulleys to return to their original position. When the lever consequently returns to the default position, the person inside the cabin feels it under their hand, releases the handle and exits the cabin according to the instructions.Advantage Effects of the Invention

[0036] • Fully mechanical rescue mechanism

[0037] • No need for an operator or mechanical expert

[0038] • Accessible and simple operation

[0039] • Simple installation process

[0040] • Applicable to hydraulic elevators of all heights and car lifts

[0041] Shows a general view of the mechanical self-rescue system and it's comprising parts.

[0042] Displays the details of part A ofwhich are the installments above the cabin.

[0043] Displays the details of part B ofwhich are the installments in the engine room.

[0044] Shows a general view of the device components and the connections between its parts which are:

[0045] A. Installments above the cabin

[0046] B. Installments in the engine room

[0047] 1. Tow wire connection brackets

[0048] 2. Tow wire connection (cable)

[0049] 3. Main elevator guide rail

[0050] 5. Elevator control panel

[0051] 8. Oil tank

[0052] 11. Sheathed cables connecting tow wires to manual release valve in the engine room

[0053] 12. Level sensors (tachogenerators)

[0054] Shows the details of the installments above the elevator cabin including:

[0055] 2. Tow wire connection (cable)

[0056] 4. The pulley unit

[0057] 9. Machanical pull lever inside the cabin

[0058] 10. Sheathed tow wire connecting the lever and pulley unit

[0059] 12. Level sensors (tachogenerators)

[0060] Shows the details of the installments in the engine room including:

[0061] 2. Tow wire connection (cable)

[0062] 6. Manual emergency release valve

[0063] 6A. Auxiliary return spring for friction compensation

[0064] 7. Elevator solenoid valve

[0065] 8. Oil tankExamples

[0066] The invention involves a fully mechanical emergency mechanism that needs no power source or battery and can be operated by any person stuck in the cabin during a blackout or malfunction. By pulling the lever inside the cabin by the person trapped in the elevator, the traction force is transferred through the sheathed tow wire to the pulley unit embedded in the upper part of the cabin and this tension causes twisting and stretching in the lower part of the connecting tow wire through the rotation of the vertical pulley unit. This tension eventually leads to the opening of the emergency manual release valve, located in the elevator engine room, and draining the oil so that the elevator cabin moves and reaches the nearest floor and the trapped person can get out.

[0067] This invention can be used in any residential or industrial building that features an elevator with limited safety precautions. It can be installed on hydraulic elevators including car lifts, service and passenger elevators.

Claims

A fully mechanical emergency mechanism for hydraulic elevators is designed that can be operated by any person trapped in the cabin during blackout or malfunction.According to claim 1, the system comprises a mechanical lever installed in the cabin, sheathed cables and tow wires, a pulley unit above the cabin, emergency valve and floor recognition sensors.According to claim 2, once the mechanical lever is pulled, the wire connecions and pulley unit open the valve, so the oil is drained and the cabin can move and reach nearest floor.According to claim 1, the emergency rescue system can be installed on hydraulic elevators of all heights and various industrial or residential capacities.According to claim 1, the emergency rescue system is fully mechanical and does not require batteries or any power supply source so it is functional during a blackout or breakdown.According to claim 1, the self-rescue emergency system can be operated by any individual in the cabin and does not require the passenger to wait for rescue personnel in the event of blackout or malfunction.

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