Dumbwaiter introduction and maintenance

Now the common elevators as "passenger elevator", "escalator", "lift" these people often use in daily life.And dumbwaiter is rare to see since the usage of dumbwaiter is not so much as elevator.Generally speaking,dumbwaiter is used in the restaurant,hotel and the library for transport food or debris.

Today let’s see the details introduction of dumbwaiter and maintenance method.

Introduction to the knowledge of the elevator

Dumbwaiter elevator, with small size, complete function, stable transport but low price.It is widely used in the dining hall and the transportation of the food and the factory, the library and so on.

Compare to the common elevators,dumbwaiter have less volume while the function is more or less.It is also run smoothly and stable,but the dumbwaiter elevator cost is much lower.

Now in the market,there are two types of dumbwaiters according to the use methods and working methods.But now people on the installation of the framework, because it is more convenient.

The wide use of the dumbwaiter, occasions throughout the school canteen, hotels, restaurants, libraries, etc.In china,the <Safety Specification for manufacture and installation of dumbwaiters> state that,the capacity of dumbwaiter elevator can not

Be lager than 300kg.

Performance advantages of dumbwaiter 

The elevator adopts advanced microcomputer control system, to ensure that the instruction is fast, accurate and reliable.

The Lift standard manual can open the door and guarantee the maximum millimeter accuracy level.

Elevator design use the hairline stainless steel type control panel, seven digital display, elevator button.

The advantages of the civil engineering: the elevator shaft is above the engine room, the drive part and the control panel are directly placed in the well path.

Maintenance of dumbwaiter 

Although the use of the dumbwaiter is not as wide as the elevator, but in a certain sense, it is also a kind of elevator.

Attention to its maintenance can increase the use of the elevator to extend its service life.So let’s make up for you to introduce some of the maintenance of the dumbwaiters.

1.First of all, in the use of the course of the elevator must pay attention to its load, pay attention to not exceed the approved load capacity.And the carrying of the goods to be placed in the middle of the elevator car as far as possible, so that the force of the elevator can be guaranteed to be uniform, and can avoid the appearance of the car stuck in the car.

2.Second, after the transport of goods to ensure that the door can be closed, so as to ensure the normal use of other floors.

3.Third,when cleaning the steel wire rope of the elevator, we must pay attention to it can not be cleaned directly by hand.But to use some tools to scrub, generally use the long handle brush tool.

4.In the end, when press the button of the elevator, be sure to pay attention to its strength, so as to avoid unnecessary damage.And in cleaning up the control panel of the elevator, we must ensure that the elevator is in the overall power of the state, so as to avoid the accident of electric shock.

3 inevitable trend of the future development of the elevator

Integration of elevator control system

Elevator automatic control system has become a branch of computer technology application in the field of a very dynamic.In order to adapt to the high request of  the system security,

reliability and function implementation flexibility, the developed system is taking the microcomputer as the core.This elevator control system is using the 4C technology, which is, computer technology (COMPUTER), automatic control technology (CONTROL), communication technology (COMMUNICATION) and conversion technology (CHANGE) into a highly related and integrated system.

It has an obvious superiority then the previous control system on adaptability, extensibility, maintainability, system stability, and so on.Now the new control system has become the cornerstone of the development of elevator control technology.

Elevator speed tends to be super high speed

With the rise of skyscrapers buildings, the running speed of the elevator is challenging, but also to promote the development of the elevator technology.

Currently the world's highest speed of the passenger elevator has reached 17m/s,
more than 18m/s elevator china will run in the more than and 600 meter high Shanghai Center Tower.

It can be expected that, with the development of multi purpose, full function of super high rise buildings,Ultra high speed elevator will continue to be the direction of research and development.

Large capacity of traction motor, high performance microprocessor, vibration, noise suppression technology, automatic pressure regulating system in the car, which is suitable for the ultra high speed elevator safety parts technology will actively promote.

The popularity of green elevator is an inevitable trend

 

The application of energy saving, environmental protection material in the elevator design and elevator parts has been created.Gear-less permanent magnet synchronous traction machine, energy feedback device is rapidly improving the matching rate.

The car walls,guide wheels and traction wheels are made of non-metal materials have been put into application.

The elevator suspension system use flat steel composite traction wire rope instead

the traditional steel wire rope traction.Especially use the non-metal traction wire rope to make replacement.

Two twin elevators sharing the same shaft space have already started to run.And the elevator group control system is more intelligent.

With the development of intelligent buildings, intelligent control system of elevator equipment can be combined with the building automation of all service equipment into a whole intelligent system.

Latest data and review of the European lift

The following data according to the European Elevator Association ELA (Lift Association European) website published by the contents of finishing.

There are 58.5 million lifts in Europe.

127,000 new lifts increased every year.

154000 elevator employees in elevator companies.

More than 1 billion users per day.

In the ISO assembly has just mastered the number of the United States Elevator 1 million 780 thousand till 2015.While I personally feel that the United States did not have so many elevators,I have seen on the Internet a bullish data is that the lift number is about 900 thousand in USA.

The chairman of ISO/TC 178 Mas Latrie De introduced that:There are 925 thousand units new elevators increased every year global.Which the largest increasing area of the elevator is the Asia Pacific Region.

Currently in the world with more than 15 million elevators, the annual increase in the elevator cost and maintenance services market price of more than $65 billion.

There are 58.5 million lifts in Europe.

127,000 new lifts increased every year.

And china elevators are 4 million 259 thousand at the end of 2015, with new lift slightly over 660 thousand increased.

Europe, China, the United States, the elevator numbers of these three area are near  80% in the total number.Just in china,the increased elevator equipment 

every year is 71.5% in the global increase numbers.

Therefore, the impact of the new elevator standards for China is the largest, we should play a greater role in the field!

Elevator type selection

With more and more buildings equipped with elevator equipment,the investor and designers will meet such problem:How to choose the elevator for your project? Now we combined some technical problems with the elevator to talk about some of the key points should be paid attention to for elevator type and also elevator design selection.

1.Main parameters to determine the transport capacity

The elevator numbers,capacity and rated speed.

The elevator should have proper transportation capacity which should meet the 5 minutes peak demand.And the time interval should not be too long for the elevator to arrive in the hall,normally can not over 2-3 minutes.

2.Need to focus on the technical performance

(1)The reliability,advanced nature and comfortable

The reliability is the ability of the elevator system to maintain the specified function within the specified time.

The request of reliability refers to the failure to do as little as possible in the run time.

Especially for the safety gear,speed governor,security touch panel, grating gate area protection system, etc. to absolutely can not fail.

(2)The advanced nature of the elevator is mainly reflected in the drive and control technology.

Vector control of the frequency modulation technology (VVVF) to make the AC induction motor speed control performance reached the level of DC motor.

Our elevator manufacturer Aolida having such advanced technology from German and Automatic producing line with imported machines.

(3)Comfort mainly refers to lift acceleration, vibration, noise, decoration, lighting and other indicators.The purpose is to provide a passenger with a comfortable environment.

It is obvious that reliability is the most important index in elevator selection.It is pointed out in GB10058 statement:Elevator operation 60 thousand times less than 5 times the failure of qualified products;failure less than 2 is the first grade and less than 1 times for excellence products.All of the elevators produced by Aolida elevator china is the first grade.

3.Drag control mode: AC double speed, voltage regulation and speed regulation

The elevator speed is zero when the elevator stops, and the normal operation is to make a straight line motion at a rated speed.

Low speed elevator often uses the two speed program(AC-2),with less control links,low probability of failure. The main disadvantage is the leveling accuracy and ride comfort is difficult to be reconciled.

Medium speed elevator using adjustable speed and voltage control (ACVV) technology.In the recent ten years, the new technology of frequency modulation (VVVF) has been developed.

Safe elevator

There are three major elevator production areas in china.One is the Jiangsu and Zhejiang area, a Guangdong region, and Tianjin, Shenyang area. The Elevator companies in Jiangsu and Zhejiang driven by technology and management of foreign brands elevator,now is far more than the other two regions on the whole ability.Perfection of supply chain,Mature technology,

Complete supporting facilities,Internal management and marketing awareness all have advantages.Our factory is one of these elevator manufacturers in Zhejiang area.

Company Introduction

Safe elevator is the sales agent of all overseas elevator business for Hangzhou Aolida Elevator Co.,Ltd which is established in 1993,the company has been developed stably for more than twenty years.

Manufacturing license and installation maintenance permit both reached A level.

With its perfect coordinated management system that covers elevator design,R&D,manufacturing,installation,debugging and maintenance,

the company devotes to providing professional,accurate and quickly overall solutions.

We have more than 2000 employees,300 service centers and more than 220 sales agent office in global market.

Our advantages as world class quality and services

1.Highest cost-effective prices compare to the top-3 brand as the seventh elevator brand in China with 23 years experience.

2.Super Speed Passenger Elevator of Heavy Load.

Capacity 2000kg high speed 8m/s passenger elevator is designed independently by Aolida.

It represent to fully reach the advanced level of the elevator industry in China.

3.Freight elevator of Heavy Load.

The load weight has been developed so far is 10000kg successfully.

4.Seiko Manufacturing with equipment imported from Germany,USA and Japan.

Such as Accurpress Bending machine and shearing machine and Muratec punching machine.  

2 sets welding robots

2 sets transfer robots

4 sets bending robots

1 laser cutting machine

3 air compressors  

14 automatic spray guns

5. Professional Installation teams have abundant experience in overseas installation.

We can send the engineer to your city for installation and maintenance training.Or you can send you people to our factory to get the professional training guidance.Will provide all technical support.

6.Warranty and guarantee issues and time duration and conditions for availing those.

After finishing the installation, the warranty period is twelve months .

Manufacturer will make free replacement parts within the warranty period.

Elevator types according to the signal control

Elevator types according to the signal control

1.Handle switch control elevator

The driver rotation handle position (open / closed) to control the elevator running or stop.This kind of elevator is very rare to see now.

2.Button control elevator

Push the elevator button to control the operation of the inner layer station.When push the call button in a service floor,then the elevator starts to run to respond and stop at this floor.

During the operation of the elevator, if there are other layer station call button press,the system can only keep the signal down, not to answer, but also cannot take the elevator stopped.Until the elevator is completed all the response to the operation of the station before,then the station can respond to other layer station call signal. It is generally used for dumbwaiters or small elevators.

3.Signal control elevator

Signal control elevator collected the call signal of each layer of station,the call signal which is consistent with the running direction of the elevator is arranged in order and the elevator will stop at these floors to pick up the passengers.

Elevator operator is controlled by elevator operator,and the elevator will stop at any level station by the car call button signal or hall button signal.

4.Selective collected control elevator

It is based on the signal control,and collected all the call signal to have a choice of response.The elevator is no driver,can automatically respond to call signal of all the layers in the same direction when the elevator is running.And if no call signal,elevator will stand by at the base station.

In order to adapt to the characteristics of this control,the elevator designs with the door protection device and overload protection device with safety contact plate.

Now most of the commercial elevators and residential elevators are selective collected control mode.

5. Parallel control elevator

Parallel control elevator sharing a set of call signal system,make the two or three sets elevators with same size in parallel to control.

If no passengers use the elevator, often have a lift dock at the base station, the lift is called the base elevator.And the others stop at the pre -selected layer station,we call it flexible elevator.

6.Group control elevator

High rise building with multiple elevators, is divided into several groups, each group of 8 - 3 sets of elevators.The elevators in each group share a signal system.By the elevator group control system, elevator operation coordination with each other, in order to improve the service performance of the elevator system.

Good elevator group control system will keep the most appropriate way to answer call signal based on different passenger traffic demand in the building.