Reporter recently learned from the green building high quality development activities, compared to wood formwork, we used to choose in the past project, aluminum formwork has much more advantages of reusability, environmental protection and better result. It is expected to lead the green building on the development of new high quality road. The reporter sees in the spot, here does not have the fine day a suit of ash, the rainy day a foot mud the construction site scene, more does not have the dust to float in the sky.
Walking all the way from the project site, the road is very clean despite the construction site on both sides.The project has carried out fine management, intelligent creation and green construction in quality control, dust prevention and other aspects, and has achieved certain results. According to the person in charge of the project, aluminum formwork is used in the construction of Xiahe garden project. Compared with the 8 times of using traditional wood formwork, The Times of using aluminum formwork can reach 200 to 300 times, and the quality of wall forming is better.
Normal wood formwork construction technology, verticality and roughness are 0 to 8 mm, aluminum formwork construction completion of the measurement data is 0 to 4 mm, and the wall can be directly growing without secondary plaster construction work, the product surface level off is smooth, uniform color, after dismantle concrete wall can achieve marble mirror effect, and can directly reduce the cost and plaster. Aluminum formwork construction can also improve the construction efficiency. The traditional wooden mold construction needs 4 to 5 days to construct a layer, but the use of aluminum formwork can be increased to 3 to 4 days, greatly improving the construction efficiency.
Compared with wood formwork, aluminum formwork reduces the potential safety hazard caused by sawing and other operations. Due to the characteristics of the material itself, there is no fire risk. The aluminum formwork is lighter in weight and lower in hoisting frequency, which greatly reduces the probability of accidents during construction and provides a good guarantee for the safety of construction personnel.
In addition, aluminum formwork in the conservation of wood, energy saving and environmental protection at the same time more reduce the cost of use, the overall economic benefits of the construction unit, construction efficiency, civilized construction level, construction safety and so on have been greatly improved. As a whole, although the aluminum formwork industry has not started for a long time, in recent years, with the promotion of green building, it has accounted for about 20% of the entire formwork market in 2017. At the same time, efforts will be made to improve the recycling effect of aluminum formwork, extend the service life of aluminum formwork, and promote the continuous development of green building RELATED QUESTION How comfortable is long distance(around 14 hours) chair car journey in Indian Railways?
More comfortable than coach/economy class in an airplane, but less than business class.Indian railways offers different types of "chair car" accommodations and comfort levels depend on which class you are in.Non AC chair car is basically no frills second class with 3-3 seating, can be reserved or unreserved. Legroom is comparable to a budget airlines economy class, decent for 3-4 hour journeyAC Chair Car is reserved with 3-2 seating and preassigned seats. They are well padded and have airline style fold down tray table.
I have done 8 hour journeys in this class in comfort. Longer should also be fine if you are ok sleeping uprightAC Executive Chair Car is available in only "Shatabdi" class of trains. It has wide 2-2 seating with generous legroom and is very comfortable for long journeyCaution: If you are traveling in Garib Rath or Yuva category of trains, stay away from chair car.
They have an economy version of AC chair car with 3-3 seating and seats that do not recline. Not comfortable for more than a couple hours
Inflatable water slides are designed for the home user. They are typically made of a thick strong PVC or vinyl and nylon, and are inflated using an electric or gasoline powered blower. The water slide is attached to a water hose in order to generate the supply of water. There are small-sized inflatable water slides for private house uses or larger inflatable water slides for school, picnic, corporate, or carnival style use.
There are also swimming pool water slides which users can set up to slide straight into a pool. Most parks avoid this due to safety concerns, and will have swimming sections in a separate pool.
So many reasons. I point fewCost. If all doors of trains to be automatically, it will cost a lot of money for railways. Railways will pass it over to travellers. Most of Indian travellers are spending more than 10% of earnings on travel.
It will be a burden for them.
Not just cost of the doors.
Also the lost income to the railways due to less people travelling as there would be no foot board space available.Sceptical about the quality. Look at the quality of our train rakes. New rakes look acceptable only for few years and not maintained later. I remember traveling in a train with one window not closing fully and it was peak winter in Delhi area.
If something like that happens with automatic doors, it could be quite big problem.Doors will be broken to make space for travelling. People travel on footboard not because they want to travel that way.
Generally, that happens due to insufficient space inside. We do not have sufficient number of trains to cater to the demand existing. One can think of automatic doors after we are able to meet the unmet demand for the trains.
Why shouldn't the Indian Railways bring a system of automatic doors in suburban trains to prevent people from footboard traveling?
To understand it's working you should know that-To create a rotating magnetic field, you need to have at least two different magnetic fields separated in phase by some angle. 90u00b0 in case of 2 phase machines and 120u00b0 in case of 3 phase machines.The windings that create the above magnetic fields must also be separated in space by same angle.
That is why 3 phase machine windings are also separated by 120u00b0 in stator and rotor.Rotating magnetic field is nothing but the culmination or interference of the magnetic fields produced by the respective windings, attaining their peaks according to their phase differences.The rotating magnetic field rotates from leading phase axis to lagging phase axis (obviously).
The rotor of the motor follows this rotating magnetic field.Having worked out the above requisites, you can now easily figure out the function of shading ring.The primary function of shading ring/coil is to create a phase difference between the main flux and flux passing through shading ring.
It's function is similar to that of a capacitor in a ceiling fan. All these methods are categorised under split phase methods for operation of single phase induction motors.Now, the shading ring creates a phase difference in such a way that the main flux leads the flux passing through shading ring by an angle, which depends upon loads of factors like resistance of the ring.
Not going into the details of phasor diagram, I can give you the final phasor diagram.Since the main flux leads the flux through shading ring, the direction of rotation of the rotor follows the same pattern.Why does a shaded pole motor rotate from an unshaded portion to a shaded portion?.
Before the advent of automation in doors trains and metros in cosmopolitan cities used to have manual doors u2026or open door system.The chicago u201cLu201d transit system was introduced in 1892 is a good example..until 1982 there was no automatic doors ..it was just hop in hop out system .automatic doors have made travel safer these have saved thousands of lives .
there was a exceptional fall in no.
of deaths due to falling of a train due to automatic doorssadly , these have not been introduced in developing countrieseg- Mumbai Suburban - the most crowded transit system lacks the most important safety normsmore than 9 people die daily in this major transit systemHow was the transport system in the western countries before the advent of automatic doors for buses and trains?
In order to augment the static pressure, there are 2 things you can do. You can pressurize the whole system OR you can lower the blower OR you can heat up the room.Now, it depends how much of an augmentation of pressure you need.
If youre dealing with ventilation, pressurizing the whole system may be complicated, since it isnu2019t a closed system, generally. So your other option is to lower it.Around sea level, you get an augmentation of ambient pressure of 100 Pa for every 10 meters. So lowering your blower to the bottom floor may only give you roughly ~50 Pa more, on atmosperic pressure or 101325 Pa, bringing you up to 101375.
Not very efficient.
The third way, if you bring your ambient temperature up from 15 deg C to 20 deg C (in a closed system) then your pressure may go up from 101325 to 103000 Pa, an augmentation of roughly 400 Pa per deg C.The last option of course is to set up another blower in serial, to augment the pressure coming into your system. It may be the only way if you need a high augmentation of pressure.
How do I increase static pressure of a centrifugal blower?
Well, if itu2019s an automatic door, it will come with a sensor and all you have to do is install it properly for working.It works pretty simple, when there is obstacle in the path it reflects the light and thus the door opens.Like this!But if you are asking to open an automatic door with other kind of sensors,All you need is the infra red gun and the right frequency.
Hide and shoot the gun towards the sensors and get the attendant go crazy What will we do to make an automatic door open using a sensor?