What Are The Protective Measures In Lifting Equipment

 The protective device of lifting equipment is indispensable, no matter what kind of lifting equipment, all protective devices must be installed to reduce the occurrence of accidents. Generally necessary protection equipment includes overweight protection equipment, torque limiter, limit position limiter, wind resistance equipment, anti-backover equipment, hydraulic buffer, etc. How to check whether the characteristics are excellent and have protective effects?

Overweight protection equipment

This is also the maintenance of machinery and equipment to prevent overweight. It must comply with the design plan. Check whether the protection equipment is flexible and reliable. Check whether the mechanical equipment, electronic devices and comprehensive overweight protection device alarms and disconnect the power device set points are overall deviations. Compliance.

Torque limiter

Torque limiter is a safety device for telescopic boom type lifting equipment to prevent overweight and overturning. Check the dexterity and stability of the torque limiter according to the method of growth or the method of weight gain, and check whether the deviation is within the established standard.

limit position limiter

Inspect the lifting organization of the lifting machinery, whether the lifting system and the operation organization can generate an alarm system when the distance between the parts is set, and automatically disconnect the power unit that runs to the risk direction.

wind resistance equipment

The key is to install anti-wind equipment for outdoor lifting equipment, and whether it can accurately alarm when the wind set point is reached or when the limit wind is working. It is necessary to check whether the components of rail clamps, iron shoes, and steel anchoring equipment are deformed or damaged, etc., and whether they are harmful to performance indicators.

Hydraulic shock absorber

This is also because it can prevent collisions and can operate more reliably. For lifting equipment with different types of lifting and operating efficiency, check whether the hydraulic buffers equipped are compatible, and check whether the hydraulic buffers are compatible. Integrity rate, whether it runs to both sides can touch the stop at the same time.

What Are The Protective Measures In Lifting Equipment

Classification And Maintenance Of Lifting Machinery

 There are many ways to classify Crane factory, which can be classified according to working mode, structure, operation mode, etc., such as light and small lifting equipment, bridge cranes, fixed and mobile, etc. Lifting machinery should be maintained during use. The editor will give you a detailed introduction to the classification and maintenance of hoisting machinery.

1. Lifting machinery can be divided into three categories: cranes and lifts according to their working methods.

　

(1) Light and small lifting equipment mainly refers to hoisting machinery with only one lifting device. There are jacks, pulleys, electric manual hoists, etc.　　

(2) Crane refers to hoisting machinery that can be lifted vertically and transported horizontally. Such as bridge cranes (also called cranes or overhead cranes), truck cranes, tower cranes, etc.

　　

(3) Lift refers to a hoisting machinery with a fixed position, a fixed lifting line, a wire rope traction, a slide rail restriction, and a cage. Including various elevators, winches, winches, etc.　

　

2. According to the structure, cranes are divided into two types: and jib cranes. 

(1) Cranes, metallurgical cranes, gantry cranes, and cable cranes are bridge cranes　

(2) Portal cranes, tower cranes, truck cranes, crawler cranes, rubber-tyred cranes, and cantilever cranes are jib cranes.　

3. Cranes are divided into stationary and mobile according to their operation mode. 

(1) Tower cranes and cantilever cranes are fixed cranes

(2) Bridge cranes, tire cranes, crawler cranes, and railway cranes are mobile cranes.

4. How to maintain the lifting machinery?

1. Check whether the fuel of the engine (or starter) is sufficient.

2. Check whether the water in the water tank is sufficient.

3. Check whether the oil in the bottom case of the engine (or starter) is sufficient.

4. Check whether the oil in the control box is sufficient.

5. Check the working condition of the engine to see if there are oil leaks, water leaks, air leaks, and abnormal knocking sounds. Both low and high speeds need to run well.

6. Check the condition of the wire rope, especially the tightness of the connection.

7. Check whether the battery, generator, motor, horn, and lighting are in good condition.

8. Check whether each instrument is normal (check according to the regulations in the factory manual of various machinery).

9. Add lubricating oil to each part according to the lubrication period, lubrication parts and oil used in the various mechanical lubrication charts.

10. Check the working conditions of each mechanism, such as each clutch, brake up and down travel mechanism, boom, pulley, hook, etc. And carry out operation test, if any fault is found, it should be eliminated in time.

11. Clean the outside of the machine.

Classification And Maintenance Of Lifting Machinery

Why can't the 5 tons Electric Chain Hoist Pull 3 tons Goods?

 I saw a friend on the Internet asking such a question a few days ago, saying that the 5-ton electric chain hoist I bought could not pull 3 tons of goods. Under normal circumstances, the electric chain hoist with a load of 5 tons can easily lift 3 tons of goods. Why does it fail to lift?

Why can't the electric chain hoist work normally?

Reason 1: The motor terminal voltage of the electric chain hoist is more than 10% lower than the rated voltage, which causes the motor's starting torque to be too small, and the electric hoist cannot lift the goods and cannot work.

Solution: The voltage of the electric hoist is low. First, when checking, use a multimeter or voltmeter to measure the voltage at the input terminal of the motor. If the voltage is too low and the motor cannot be started, wait for the system voltage to return to normal before using the electric hoist.

Reason 2: The main and control circuits of the electric chain hoist are damaged, the circuit is disconnected or the contact is poor, so that the hoist motor cannot be energized or the power supply system cannot transmit power.

Solution: In this situation, the main and control circuits need to be overhauled. During the overhaul, in order to prevent the main and control circuits from losing phase and burning the motor, or the hoist's motor is suddenly energized and running, causing harm. To disconnect the hoist motor from the power line, only supply power to the main and control loops, then click the start and stop switches, check and analyze the working conditions of the control appliances and lines, and repair or replace the defective appliances or lines. Only when it is confirmed that the main and control circuits are not faulty, can the test run again.

Reason 3: The electric chain hoist motor was burnt due to long-term continuous high-intensity work. The electric chain hoist was not used for a long time, and the brake wheel and end cover were rusted due to poor maintenance. The motor could not rotate and the hoist could not work.

Solution: The brake wheel and end cover of the electric chain hoist are rusty. At this time, you should remove the brake wheel, clean the rusted surface, and then re-test the motor to severely sweep the bore, which will also make the motor not rotate. It is found that this situation It should be discontinued and the motor must be overhauled or replaced to ensure normal operation of the hoist.

Reason 4: The internal gear of the electric chain hoist is bitten and jammed or the chain of the electric chain hoist is jammed, which makes it impossible to hoist.

Solution: After the power is off, straighten out the chain to avoid twisting the chain. If the chain has been deformed, it needs to be replaced with a new chain before lifting.

We need to check the electric hoist step by step. When the specific problem is detected, we can follow the corresponding solution.

Why can't the 5 tons Electric Chain Hoist Pull 3 tons Goods?

Precautions for Double Speed Electric Hoist

 The double speed electric hoist is an electric hoist that integrates normal speed and slow speed. Other than that, it is basically the same as ordinary electric hoist, so it is basically the same as ordinary electric hoist in use.

• The newly installed double speed electric hoist should be used for empty test run several times before use, but before the installation is complete, remember to power on the test run.
• Before normal use, the double speed electric hoist should be subjected to a static load test with a rated load of 125%, lifting about 100 mm from the ground, and 10 minutes to check whether it is normal.
• In the use of the double speed electric hoist, it is absolutely prohibited to use it in an environment that is not allowed, and when it exceeds the rated load and the rated number of closings per hour.
• It is not allowed to press two flashlight door buttons that make the electric hoist move in opposite directions at the same time.
• The double speed electric hoist should be operated by a dedicated person. Should the operator fully grasp the safe operation regulations? It is strictly forbidden to pull the inclined crane.
• The double speed electric hoist must maintain sufficient lubricating oil during use, and keep the lubricating oil clean, and should not contain impurities and dirt.
• When the double speed electric hoist is not working, it is not allowed to hang heavy objects in the air to prevent permanent deformation of the parts.

The main difference between the double speed electric hoist and the ordinary electric hoist is that it can be accurately positioned. When the normal speed cannot reach the specified position accurately, the slow speed can be used for adjustment.

Precautions for Double Speed Electric Hoist

EOT cranes of Dongqi- Chinese EOT crane manufacturer

 

EOT cranes

EOT Cranes refers to electric overhead cranes, which is a common type of material handling equipment, used in various applications such as, construction sites, production workshops, storages, power stations, and other similar application environments.

Types of EOT Cranes

There are different types of EOT Cranes. Generally, they can be classified into the following types:
1. Single girder EOT Cranes, 2. Double girder EOT Cranes, 3. Gantry cranes, and 4. Monorail cranes.
Besides the above classifications, EOT Cranes also can be classified into top running single girder EOT cranes, under running single girder EOT crane, box EOT cranes, tube girder EOT cranes, truss girder EOT cranes, and others. The generally EOT cranes are shown in the following pictures:

Overhead crane configuration

1. Single girder EOT crane. 2. Double girder EOT crane.
   2. Single girder under running EOT crane. 4. Double girder under running EOT Crane
   5. Box girder top running EOT Crane

Factors influences EOT cranes selection

Confront with the various types of EOT cranes, How to choose the proper EOT cranes for your application? When select an EOT crane, the following questions can help you to find the proper EOT Crane:
1. What’s the specifications, codes and local regulations used for EOT cranes?
2. What is the lifting capacity of the EOT crane you required?
3. What’s required span and height?
4. What’s the duty cycle, working class of the EOT crane required?
5. What’s the hoist weight? And what’s the hook approach, length of runway systems?
6. What’s the feature of the EOT cranes application environment? Is it dusty, humidity, flammable or combustible, etc.?
7. What’s the necessary crane and trolley speeds?
8. What’s the voltage/phases/amperage, and the control system desired?
9. Is there existing cranes on the runway?
10. What’s the safety measures for the EOT cranes?
11. How the EOT cranes be maintenance?
12. What are the EOT cranes accessories? And others.

Lifting capacity of EOT cranes

All these questions can be answered by professional EOT crane manufacturers. Don’t hesitate to Consult Dongqi Crane, your professional EOT crane manufacturer at side. EOT cranes range of Dongqi Crane:
Dongqi Crane can provide EOT cranes with the following tonnages:
1 ton EOT Cranes , 2 ton. EOT Cranes, 3 ton.  EOT Cranes, 5 ton. EOT Cranes,. 10ton. EOT Cranes, 12.5ton.. EOT Cranes, 15ton. EOT Cranes, 20ton. EOT Cranes;
25ton. EOT Cranes, 30ton. EOT Cranes, 35ton. EOT Cranes, 40ton. EOT Cranes;
50ton. EOT Cranes,  60ton. EOT Cranes, 80ton. EOT Cranes, 100ton. EOT Cranes;
125ton. EOT Cranes, 150ton. EOT Cranes, 200ton. EOT Cranes.

EOT cranes of Dongqi- Chinese EOT crane manufacturer

Garage overhead crane for sale

 Garage overhead crane, a kind of overhead bridge crane, also called portable overhead crane or mobile overhead crane, which is a necessary bridge crane to use in non industrial application, such as your garage, pole barn, and workshop and man cave. Owned a garage overhead crane, you will make you work easier, faster, better and safer. A garage bridge crane with two parallel steel tracks makes a steel bridge work smoothly on your workshop. Whatever left and right, or forward and right, the garage bridge crane also can operate easier. Besides, for a garage overhead crane, there are no certain limited for the thing you want to lift or move. And the key feature of garage bridge crane is that you can move anytime anywhere in the factory.

garage overhead crane

 

garage overhead crane parameters

Lifting Capacity: 0.5~10t
Span Length: 2~40m
Lifting Height: 3~60m
Working Class: A3-A5

 

HD type european standard overhead crane

 

HD type european standard overhead crane parameters

Lifting Capacity: 3.2~16t
Span Length: 7.5~28.5m
Lifting Height: 6~12m
Lifting Speed: 0.66/4-1.6/10m/min
Trolley Speed: 2-20m/min
Working Class: A5
Ambient Temperature: -20~40℃

HD type european standard overhead crane of Dongqi Crane

 

HD type european standard overhead crane of Dongqi Crane parameters

Lifting Capacity: 3.2~16t
Span Length: 7.5~28.5m
Lifting Height: 6~12m
Lifting Speed: 0.66/4-1.6/10m/min
Trolley Speed: 2-20m/min
Working Class: A5
Ambient Temperature: -20~40℃

KBK Free Standing Overhead Crane

 

KBK Free Standing Overhead Crane parameters

Lifting Capacity: 0.5~3t
Span Length: 3~12m
Lifting Height: 3~6m+
Working Class: A3

LDtype single girder electric hoist crane

 

LDtype single girder electric hoist crane parameters

Lifting Capacity: 1-20t
Span Length: 7.5-28.5m
Lifting Height: 6-18m
Lifting Speed: Single/Double/Variable Speed
Working Class: A3, A4
Ambient Temperature: -20-40℃

Garage overhead crane for sale

Single girder crane catalogue

 

Single girder crane catalogue introduction

Single Girder Overhead Crane

• Lifting Capacity: 3.2t~16t
• Working Temperature: -25℃~40℃
• Standards: DIN, FEM, ISO

LD type single girder eot crane

• Lifting Weight: 1T-20T
• Span: 7.5m-28.5m
• Working Environment Temperature: -20 ℃ ~ 40℃
• Working Grade: A3-A4
• Control: electric control

LDP type electric single girder crane

• Working Environment Temperature: －20℃～+40℃
• Rated Load: 3T~10T
• Span: 7.5M~22.5M
• Working Grade: A3, A4

LDZ type single girder eot crane

• Lifting Capacity: 2~10T
• Span: 4.5~28.5M
• Working Environment Temperature: -20 c ~+40 c
• Control: electric control

LX type single girder eot suspension crane

• Lifting Weight: 0.5T-10 T
• Span: 3-16m
• Working Environment Temperature: -20℃~+40℃
• Control: electric control

SL Manual single girder bridge crane

• Weight: 0.5T~10T
• Working Environment Temperature: above -20℃
• Control: manual control

Single girder crane catalogue pdf

If you need a custom crane or need a complete crane solution or if you have any other questions, you can submit a message to us. We usually get in touch with you within 24 hours.

Single girder crane is a kind of small overhead lifting equipment that typically comes in single girder construction.

It can be designed for general lifting purposes as well as special lifting applications, such as to lift and move a heavy load in workshops, warehouses, workstations, steel mills and chemical plants.

ld_single-girder_overhead_crane_specification pdf

Single Girder Crane Classifications

At American Crane, we offer our customers four unique single girder crane designs to meet their specific needs.

Class A – Infrequent or Standby 

These cranes provide precise handling at slow speeds and are suitable for various applications, including turbine rooms, public utilities, motor rooms, powerhouses, and transformer stations.

Class B – Light Service

Class B cranes are perfect for light service applications that have low-speed requirements. These cranes can typically handle two to five lifts an hour and are ideal for applications such as light assembly operations, repair shops, light warehousing, and service buildings.

Class C – Moderate Service

Class C cranes are built for applications with moderate service requirements such as paper mills, machine shops, and other applications. They can make 5 to 10 lifts per hour, with loads that average 50% of the cranes rated capacity.

Class D – Heavy Service

Class D Heavy Service cranes are used in applications such as foundries, heavy machine shops, steel warehouses, fabricating plants, lumber mills, and container yards. They are ideal for heavy-duty production where a standard duty bucket and magnet operation is required. These cranes can perform 10 to 20 lifts per hour, averaging 15 feet, at less than 65% of the cranes rated capacity.

Single girder crane catalogue

Cmaa single girder crane specification

 

Cmaa single girder crane specification introduction

Single girder cranes are designed to aid with a range of hoisting and moving operations. When properly designed, they will enhance daily production and provide an ideal solution for facilities and operations with limited floor and overhead space that need a light to medium duty crane.

The construction of a single girder crane consists of a single girder beam, known as a bridge, that runs the building’s width. A trolley moves horizontally along the bridge, positioning a hoist and hook, which is used to raise or lower the load.

Cmaa single girder crane specification PDF

Single girder pdf

What is Cmaa single girder crane specification

CMAA has organized this Buyer’s Guide to promote standardization and to assist prospective buyers of electric overhead traveling cranes in selection of equipment most suitable for their applications.

The Crane Manufacturers Association of America, known as CMAA, is an organization of over thirty leading American manufacturers of electric overhead traveling cranes and components.

CMAA has published standardized crane specifications for almost sixty years. Two publications in particular, CMAA 70 – Specifications for Top Running Bridge & Gantry Type Multiple Girder Electric Overhead Traveling Cranes and CMAA 74 – Specifications for Top Running & Under Running Single Girder Electric Traveling Cranes Utilizing Under Running Trolley Hoist, are recognized throughout the United States as the de facto standards of industrial crane design.

CMAA traces its roots to the Electric Overhead Crane Institute, known as EOCI, which was founded in 1927 by leading crane manufacturers of that time to promote standardization of cranes, uniform quality and performance. EOCI published standardized specifications in 1949 and again in 1961.

CMAA Specification 70, first published in 1971, superseded ECOI 61. Since 1971, CMAA Specification 70 has been republished several times with changes and updates managed by CMAA’s Engineering Committee. CMAA Specification 74 was first published in 1974 to provide similar design information on single girder cranes.

Cmaa single girder crane specification

Overhead crane for Hot Ladel & Metal Handling

 Dongqi Crane specializes in the design and manufacture of lifting and hoisting equipment to meet your molten metal handling needs. Our specialized overhead crane systems are engineered to handle molten metal in accordance with various industry standards and specifications, while ensuring maximum operational uptime for critical process applications.

Types of Hot Metal Ladles

Hot metal ladles are vessels that are responsible for storing, transporting, and pouring molten metal. They are typically used to transfer hot metal from one process to another. Ladles in foundries range in size and weight, with some large industrial steel mill ladles weighing as much as 300 tons. Open top and torpedo ladles are the two most common types of hot metal ladles used today.

Open Ladles

This type of ladle is a hollow cylindrical metal structure with a dished bottom—visually similar to a bucket. Once filled with molten metal, open ladles are transported to the next metallurgical process via an overhead crane. The crane – which is outfitted with a tilting winch – tilts the ladle to empty its contents.

Torpedo Ladles

Torpedo ladles are egg-shaped hollow metal vessels. Metal is poured into the mouth of the torpedo and transported to the required destination. The contents of torpedo ladles are emptied by rotating the structure on its axis until the molten material pours from the opening.

Some essential parameters that must be into consideration when specifying open top or torpedo ladles include:

• The capacity of the ladle
• Ladle weight
• Ladle dimensions (height, diameter)
• Centerline distance of trunnion to top and bottom of lining flange
• Maximum internal diameter of the ladle
• Maximum distance between the centerlines of trunnions and ladle hooks

Overhead Cranes for Ladle Handling

Overhead cranes designed to handle hot metal ladles are specially designed to be durable, stable, and reliable enough to safely lift and transport molten materials from one point to another. These cranes must also be able to withstand harsh conditions such as heavy loading, extreme temperatures, and excessive vibrations.

OSHA, ANSI/ASME, AIST, CMAA and AFS specifications all provide various guidelines for the handling of molten metal materials. Following these stringent standards ensures that your workers and facility can perform safely, and that your equipment can operate in the most effective way possible. At American Crane, we can help you ensure that your equipment meets all relevant safety and performance standards for your application.

Dongqi Crane & Equipment Corporation Offerings

At Dongqi Crane, we offer a broad range of custom and standard ladle handling equipment, as well as relevant parts and components to meet any customer need or demand. We draw on over four decades of experience as a top innovator in wire rope hoists and electric overhead traveling cranes to provide heavy equipment capable of lifting in excess of 1000 tons.

We can custom manufacture cranes based on your specifications or upgrade your existing equipment to meet the strictest industry standards. All our hot metal and ladle handling solutions are meticulously designed and crafted for maximum safety, reliability, and longevity while operating in harsh metallurgical applications.

Dongqi Crane also offers a full range of services to handle all crane manufacturing processes from concept to completion, including:

• Crane design
• Crane manufacturing
• In-house quality assurance
• Full assembly and thorough testing of equipment in advance of shipment
• Crane experience exceeds the CMAA duty cycle requirements

Dongqi Crane for sale  & Equipment Corporation is equipped to meet all your molten metal and hazardous material handling needs. Ready to get started? Please contact us or request a quote.

Overhead crane for Hot Ladel & Metal Handling

2 Ton Wire Rope Hoist for Sale to Montenegro

 2 Ton wire rope electric hoist for sale to Montenegro is a small lifting equipment, small size, light weight, simple operation and easy to use. Electric rope hoist can be mounted on single beam overhead crane, gantry cranes, jib cranes, widely use in industrial and mining enterprises, storage dock, cargo storage area and workshops and other places. As a professional electric wire rope hoist supplier, Dongqi electric hoists crane machine can provide any capacity according to your requirement.

Electric Rope Hoist for Sale to Montenegro Customer:

• Quantity (sets): 4
• Lifting Capacity (t): 2 ton
• Lifting Height (m): 5
• Lifting Speed (m/min): 8 (0.8/8)
• Travel Speed (m/min): 20/30
• Rail: 16-28b
• Work Duty: M4
• Power: 3PH AC 380V 50Hz

Wire Rope Hoist Components Offered to Customer:

• Reducer: The third-class dead axle helical gear transmission structure is adopted; gear and gear axle are made of heat treated alloy steel, case and case cover with precise assembly and good seal are made of quality cast iron;the reducer is independent,so it is easy to load and unload it.
• Motor: Hoist Motor is an taper type rotor motor with braking, has bigger torque, can be adapted to moving frequently.
• Gear Box: Hoist Gear Box has specially treated gears for high wear resistance. Each Geared Shaft assembly is supported on ball or roller bearings , to ensure smooth, low-friction operation.
• Wire Rope: Hoisting rope comply with the exporting ISO standards. The leading rope taken by the Drum, does not slip sideways when slack. The factor of safety, on the nominal breaking strength of the rope is six.
• Rope Drum: Grooved Drum, seamless pipe of adequate length to be wounded in one layer and to provide proper support for the rope to minimize abrasive wear is provided. Drum Shaft resolves on Ball Bearings for ensuring smooth running.
• Electric control system: Composed of the contactor box, controlling switch, cut-off limiter. It has device with up and down stoke protection of break off limiter and can cut off main circuit in an emergency, which ensures safety operation of electric block. Electric elements are of long service life and operational safety.
• Rope Guide: Rope Guide is in two halves, ensuring easy accessibility. It encircles the Drum completely so that the rope may not uncoil even when the Hoist is in unloaded condition.
• Hook: The Hook Block is tested to 150 % of full load before assembly. The rope sheaves are fully guarded with protective steel casting.
• Button switch: Easy to handle and has two modes of cord operation and cordless remote control.

2 Ton Wire Rope Hoist for Sale to Montenegro