Electric single-girder portal crane

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Electric single-girder portal crane

General

Electrical Hoist Gantry Crane is used together with CD MD Model electrical hoists.It is a track travelling small and medium-sized crane. Its proper lifting weight is 5 to 10 tons, proper span is 12 to 30 meters, its proper working temperature is -25°C to 40°C

It has two controlling methods, namely ground controlling and room controlling.

Feature

1)Power source is three-phase alternating current,rated frequency is 50Hz, rated Voltage is 380V.

2)The altitude height of site is ought to be less than 2000M.

3)Flammable,explosive and corrosive gas are forbidden in the work environment.

4)The crane is forbidden to lift fuse and blend deleterious article and flammable explosive article.

Technical characteristics of single gantry crane

This crane has hard surface gear reducer and steel rope and three-in-one transmission mechanism. Protective functions are as the following: acoustic-optic alarm, hook automatic stop protector, circuit protector and over current and phase lose protection and intelligent limit.

The electric devices adjust speed without contactor spark module and fulfill frequency convert function to reach mini-speed and double speeds, which make travelling and lifting very steady. The operating board (handle) adopts 12V safe voltage.

The electronic controlling can be used more than 2 million times when the voltage is +5~-10% of 380V.

Choosing principle of single gantry crane

According to the working system and using field. Which system you will choose, field should go first.

Calculating the times per hour of starting and pulling-on recycle, you should make the practical time per day and continuous time (h).

When select or appraise, you should be sure such items as field, all the limiting size, ambient temperature, speed, time(h), intermission or continuous, the time of starting and pulling-on per hour, etc.

The above mentioned is just for reference. Reasonable selection, design and match can increase the working efficiency greatly.

Table technical data

Lifting capacity		t	5					10
Span		m	18	22	26	30	35	18	22	26	30	35
Lifting height		m	10			11		10/10.5			11/11.5
Work system			A5
Speed	Main lifting	m/min	9.0
	Aux lifting							9.0
	Trolley traveling		35
	Crane traveling		30
Total power		KW	22.8			25.8		36.8			39.8
Max wheel load		KN	160	166	185	231	233	225	256	239	286	298
Recommended rail		Kg/m	43 kg/m
Power supply			380V, 50Hz, 3P( we can design cranes according to client’s local power source)

Layout

Electric single-girder portal crane

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Q:I had this question on one of my Physics exams and I am curious on how to solve it correctly:quot;A motor having an efficiency of 88% operates a crane having an efficiency of 42%With what constant speed does the crane lift a 410-kg crate of machine parts if the power supplied to the motor is 5.5 kW?quot;I can solve these types of problems if there is only one machine involved, but I am not too sure how to incorporate both the motor and the craneWhat I did on the test was multiply these two efficiencies together (0.88 x 0.42 0.3696 37%) and then worked it like a one-machine problem, but I wasn't taking the correct path (I knew I wasn't, but I just wanted to take a nice shot in the dark)How is this problem solved?: You need to do the attic first but doing the floor in that situation is not going to be a big money saver but it will make an impact on your comfort.

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Q:A crane lifts the 22000 kg steel hull of a ship out of the waterDetermine the following.(a) the tension in the crane's cable when the hull is submerged in the water N(b) the tension when the hull is completely out of the waterN: This Site Might Help YouRE: How would I keep food warm outside with no electricity.Feeding homeless Thanksgiving dinner.? Feeding at least 200 people - turkey, dressing, gravy, potatoes, green beans, etc.

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Q:i have a friend over and we are bored as hell we have no money, no car and she is leaving in less than 2 hourswhat is there to do? plus we have a big backyard and stuff but what is there to do w| two ppl?: a) By Work energy relation:- W PE(gain) mgh (mg)h 22 x 10^3 x 25 5.5 x 10^5 J b) By P W/t [5.5 x 10^5]/12 4.58 x 10^4 Watt 4.58 x 10^4/746 HP 61.44 HP

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