1. There are three major defects in the ordinary escalator

The ordinary escalator wastes electricity. Escalators and elevators are the most typical equipment for transporting passengers in public places, which have been widely used in stores, airports, subway, hotels and other places. But so far, most of them are powered by commercial power supply and do not speed up. This makes the escalator busy running on the unmanned passenger seat, especially in a very cyclical occasion, such as airport and subway station, when passengers arrive at the time of arrival of the aircraft or train, there are few passengers in other times.

The ordinary escalator machine wear seriously and the service life is short. Because of the common escalators direct starting mode, the general operating eight hours a day or more, regardless of whether the passengers take the escalator escalator, always keep the high-speed operation, the mechanical wear is relatively large, the general life of the escalator in about 10 years, more than this period main parts wear is very serious, need to replace the new escalator or replacing a large number of the components can be used. This is the defect that the ordinary escalator can not solve before the intelligent transformation. This is one of the main reasons for the gradual elimination of ordinary escalators.

The failure rate of the ordinary escalator is high and the cost of use is high. Because of the common escalator General operating eight hours a day or more, regardless of whether the passengers to ride the escalator escalator, always maintain high-speed operation, the handrail, comb plate, cascade components such as wear, in addition to replace components requires a large amount of expenses, increase the gap due to wear, often lead to the escalator failure and stop running, are a very annoying thing for users and escalator maintenance units. This is still one of the main reasons for the gradual elimination of ordinary escalators.

To solve the defects of ordinary escalator in the end there is no good way? The answer is yes, only through the intelligent transformation of the existing common escalator, can achieve the ideal effect, rapidly enhance the escalator grade, greatly reduced power consumption, greatly prolong the service life.

Two. The principle of intelligent energy saving for escalator

First of all, through the human body automatic induction device is installed on the escalator at the entrance of a signal into the passenger, the signal analysis, time delay, and finally determine the intelligent inverter output voltage and frequency by microcomputer, so that the escalator according to passengers with and without more and less, to determine the running speed of the escalator and escalator main motor the size of the force, to save energy and reduce mechanical wear and prolong the service life of the best effect.

The following is as follows:

(1), unmanned ladder: ensure the escalator automatically transition to energy saving operation, running at 1/5 rated speed. (it is possible to choose the function of the escalator to stop automatically when the ladder is unmanned).

(2), when there are people on the ladder: to ensure the escalator to automatically transfer to the rated speed to the rated speed.

(3) the escalator operates with the energy saving speed mode when the escalator is no-load, and the current is only 1/3 of the rated speed operating current when no load is loaded.

(4) maintenance and operation: the escalator system runs at 1/2 rated speed, which is convenient for overhaul and observation of the operation of escalator, and avoids the shortage of original system running at rated speed and stop operation.

(5) because of the low speed of energy saving and low speed of energy saving, the wear of mechanical parts is greatly reduced and the service life of the escalator is prolonged.

(6) the adoption of frequency conversion technology greatly reduces the impact of escalator on power grid. The frequency converter can effectively improve the power factor and reduce reactive power loss of power grid.

(7) the coexistence of the frequency conversion system and the original system is fully considered in the transformation, which facilitates the switching of the system when the system fails, and does not affect the user's use.

(8) the security conditions of the original system were borrowed from the original system, and the safety link of the converter itself was added to make the system more secure and reliable.

(9), energy-saving escalator equipment compared to the cost, and power saving and mechanical wear cost is small, short-term investment can be recovered, so the development and application of intelligent energy-saving escalator safety reformation technique successfully, can improve the existing escalator safety and energy saving, has significant economic and social benefits.

Three. Economic benefit analysis of escalator intelligent energy saving transformation

1. How much electricity can be saved after the intelligent transformation of the ordinary escalator?

After the intelligent transformation of escalators, how much electricity can be saved generally is a concern for users. To answer this question, the key problem is determined by the user's existing escalator.

The examples are as follows:

(1) when the use rate of the ordinary escalator is low (less passengers), the power saving effect is very obvious after the transformation, and the maximum energy consumption can be reduced by up to 70%.

(2) when the ordinary escalator has a higher rate of use (more passengers), the power saving effect is a little worse after the transformation, which is generally not less than 20%.

For building materials market, furniture market, hotels and other places, customers' traffic volume is no longer than that of department stores, shopping centers and other retail establishments. Escalator utilization rate is relatively low. In about 10 hours a day running, about 5 hours in vain to waste electricity, on the escalator of a 7.5KW as an example, electricity savings each year: 365 days 5 hours / day / hour * 7.5 degrees =13687.5 degrees, to 1 yuan per kilowatt price calculation, a 7.5KW escalator annual savings of money about 13687.5 yuan, saving rate is about 50%.

2. After the intelligent transformation of the ordinary escalator, how much can it be used to improve its service life?

After the intelligent transformation of the escalator, the running speed of the escalator is only 20% of the normal running speed without passengers. In theory, that is to say, the mechanical wear can be reduced by 80%, and the average value is 50%, which is more reasonable, that is to say, the life of the escalator can be doubled. If the original escalator has a life span of 10 years, the life of the escalator can reach 20 years. In fact, the truth is very simple and easy to understand.

3. After the transformation of the ordinary escalator, the failure rate of the escalator can be greatly reduced and the cost of the use is obviously reduced.

The retrofit of ordinary escalator, the running speed of the escalator when no passenger escalator is only the normal speed of 20%, escalator mechanical wear is greatly reduced, the parts replacement period is prolonged obviously, not only can save a lot of the purchase cost of wearing parts, expected escalator maintenance costs can save about 50%, and can reduce the maintenance of escalator affect the normal use of the escalator time.

In a word, the intelligent transformation of the ordinary escalator is basically divided into the following advantages:

(1) the electricity cost of 20%-70% can be saved.

(2), the service life is extended by 100%

(3) the loss of the escalator components is reduced by 50%.

(4) the number of repairs was reduced by 50%.

Four. The relationship between the intelligent energy saving system of escalator and the original system

In the transformation, the coexistence of the frequency conversion system and the original system is fully considered, and the design principles and protection circuits of the original equipment are retained. The original circuit of the escalator is changed very little, so that it is convenient for the system to switch between different failures, and does not affect the normal use of the users.

Five, the operation mode of escalator after the conversion of frequency conversion and energy saving

When the ladder is unmanned, the escalator will be transferred to the energy saving operation automatically and run at 1/5 rating.

When the ladder is taken, the escalator will be automatically transferred to the rated speed at a stable rate of energy saving.

Maintenance operation: the escalator system runs at 1/2 rated speed, which is convenient for overhaul and observation of the movement of escalator mechanism, and avoids the inadequacy of the original system's rated speed and point stop.