Different speed electric hoist

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Different speed electric hoist

1.Introduction

CD or MD type electric wire rope hoist is a kind of light type lifting equipment. It could be installed on single girder crane with hoist, overhead,gantry and jib crane. Modified could be used as a winch. So it is a commonly used lifting equipment in factory, mine, port, warehouse, cargo yard, shop etc, is a nessesary equipment to improve working efficiency and labor conditions.

2. Technical parameter

Model					CD1 MD1
Capacity			t		2									3
Lift height			m		6	9		12	18		24		30	6	9		12	18		24		30
Lift speed			m/min		8, 0.8/8									8, 0.8/8
Travel speed			m/min		20									20
Wire rope	Nominal diameter		mm		11									13
	Structure				6×37+NF									6×37+NF
Traveling track GB/T706-1988					22a~45c									20a~45c
Min curvature radius				m	2		2.5			3		4		2		2.5			3		4
Hoist moto		Model			ZD1 31-4 ZDS1 0.4/3.0									ZD1 41-4 F1 ZDS1 0.5/4.5 F1
		Power	KW		3, 0.4/3									4.5,4.5/0.5
		Rpm	r/min		1380									1380
Trolley motor		Model			ZDY1 11-4									ZDY1 11-4
		Power	KW		0.2									0.2
		Rpm	r/min		1380									1380
Bonding times			T/H		120									120
Work duty					M3									M3

3.Sketch

Q: What wind protection devices should be set when working in the open air?: For crane in the outdoor work, should be set rail, anchor device or iron shoes, and must be able to separate non-work state under the maximum when the wind doesn't blow down.

Q: What items should be inspected before the lifting machine is done daily?: Power systems and controllers, etc. The above inspection should be done before using the lifting machine for more than one month.

Q: How do you handle the failure of the crane: When the brake suddenly fails, the driver should be calm, calm and take reasonable measures to minimize or eliminate possible accidents and losses. Solution: one: when the brake suddenly fails, a point car or anti-car operation should be carried out immediately. Point of car and the car after the operation, if the failure situation continue to exist, it should be based on objects at the time of case, motor and effective emergency measures, and issued a warning signal, if the job content close to the ground, fall down and there is no danger, should be the last block in the brake pull to fall, in normal operation way, put the required items. It is not allowed to fall freely. If in the original position falls directly on the object will cause an accident, is decided to drive the car, the controller handles step by step to turn to the last step in the direction of rising (pay special attention to, at this time can't turn control handle to the last step, because action too fast will make over-current relay action). While moving the controller handle to the upward direction, it is important to keep the big, small car (or torsion bar) in a safe position to keep the object down. If the above measures are taken, if it is up again, the big, small car (or a torsion bar) will not be able to drive the car to a safe position, and it will be raised again and again and again and again.

Q: The type, composition and function of the construction crane: Full road crane High speed, good maneuverability and good driving. Use special chassis, oil and gas suspension, all-wheel drive and steering, but cross-country drive. High performance, complicated structure, the most expensive, 40% more than truck crane. The tonnage interval is: 5 ~ 800 tons. The assignments are limited in time, and the work height and amplitude can be changed at any time

Q: The door frame of the door crane is made up of which parts: The main beam is rigidly connected to the beam, and the ends of the beam are equipped with wheels to support the bridge. There is a track on the main beam for the crane to run. The structure of the main beam of the bridge is more typical of box structure, four truss structure and hollow truss structure. The box structure can be divided into two kinds: the two beams of the right box, the two girders of the offset box, and the monorail box. On track box double beam is widely used in a basic form, main girder by on either side of the upper and lower flange plate and the vertical web, rail car arrangement in the center of the line on the flange, its simple structure, easy fabrication, suitable for batch production, but gravity is bigger.

Q: Mechanical drawing of lifting hooks,: First of all, A is A supplementary circle with A radius of 60, which is the intersection point of the horizontal center line of the lower end C, and then C is the circle with a radius of 40. Let's draw the radius of B as the radius of 71 and draw the auxiliary circle The horizontal center line of the upper end is D, and then D is a circle with a radius of 23. Then choose "Tangent, tangent, radius" draw the circle of radius 4. Finally, use the pruning tool "TR" pruned the extra round to the drawing of the figure. Note: directly using the label of the label, the line, the diameter, the arcs will be finished The graph is labeled. The position of A, B, C, and D is shown in the diagram below. I'll make the width of the line wide, and click on the image magnifying point to see clearly.

Q: The trailer has sufficient height for the neck, and when lifting, the truck or tractor can be transferred to the bottom of the goose's neck, which is to be hoisting to the hook.: Travel switch, is to limit the trip, like lifting must be crane, cart, trolley should have as to travel switch series is too much

Q: Is the car in the workshop a mobile crane?: A row hanger belongs to move, like a fixed gourd does not belong. The tower crane does not belong either

Q: Scrap standard for lifting mechanical hooks: Increase the opening level by 15%. 4. The torsional deformation of more than 10 °; Plastic deformation in the neck of a dangerous section or hook. The liner should be scrapped when wearing 50% of the original size. The shaft of the plate shall be scrapped when the axis of the hook is worn at 50% of the original size

Q: How to choose tower crane model according to the height of building?: The choice of tower crane is not based on height, it is based on cover area, height is only a reference value. The high level QTZ now has a wall, so the height is not a problem. Let's talk about the shape of your building. It's better to have a better picture, five points, and a little less

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