How to safely operate the gantry crane?

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As the large lifting equipment, the safe operation of gantry cranes plays an important role in the company’s production and personal lives.
Each type of crane has its own safe operation procedures. If you want to operate crane safely, you must master it in advance. The following is a brief introduction of safe operating procedures for gantry cranes.
1. Before the gantry crane is operated, the brakes, hooks, wire ropes and safety devices of the crane need to be checked. If any abnormal phenomenon is found, it needs to be solved in time.
2. The operator must confirm that no one is on the platform or track before turning on the main power. When the power circuit breaker is locked or a notice board showed, the main power supply should be removed before turning on. When the gantry crane is operated, it is necessary to perform the bell alarm for various operations in accordance with the regulations, and also need to operate in accordance with the unified command signal.
3. When the vehicles of gantry cranes are in normal operation, they cannot be braked and stopped. When changing the movement direction of the vehicles, the handle must be at the “zero” position and the mechanism should be completely stopped before driving in the opposite direction.
4. When the gantry crane suddenly loses power, it is necessary to return all the control handles of the crane to the “zero” position in time, and check whether the gantry crane could be operated normally before restarting.
5. For gantry cranes with two hooks, if the main and auxiliary hooks are switched and the height of the two hooks is close, the main and auxiliary hooks must be operated separately to avoid collisions.
6. When lifting heavy objects, the weight should be lowered 0.5 meters above the ground to check the performance of the gantry crane brake, and then perform normal operations after confirming the reliability.

Providing non-standard customized electric winches by Yuantai Crane

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With the development of economy, more and more electric hoist are needed and applied for lifting material in many industry fields. But for some kind of working condition, it is not easy to operate and install the electric Wire Rope Hoist or Chain Hoist. In Mining, construction, metallurgy industry, compared with hoist, Electric Winch is a better and more suitable solution for vertical and horizontal material lifting.
As we all known, there are various kinds winches. According to the power method, they can be divided to: manual type, electric type, Pneumatic type and hydraulic type. Among them, the most widely used is electric winch, such as: Low speed electric winch, high speed electric winch, large ton electric winch. Within short lead time, most manufacturers can provide the standard type with better price. The common characteristic of standard are: single speed, electric brake and cylindrical drum. However, different working conditions need different characteristics for electric winch. With The demand for customized winch increasing, the manufacturer should also be capable of designing and manufacturing as customer’s requirements.
On 7th, September, Yuantai Crane got an inquiry of non-standard customized electric winches from Mr. John in Oman. At firstly, his requirements for the basic technical parameters are: 6 tons lifting capacity and 16 meters rope capacity. Then, he proposed three points for customized demand.
The first point is speed. What he requires is inverter control instead single or dual speed. At the same time, the electric winch should be programmable. The characteristic of inverter control and program is not common for electric winch. With our professional engineer’s hard working, the initial drawing finished, but it is a little different with Mr. John’s need. Finally, by three revisions and continuously communication, the product we designed beyond Mr. John’s expectation.
The second point is the drum, what Mr. john need is tapered instead of regular cylindrical. Almost each electric winch manufacturer can make the tapered type, but what matters is the higher cost. Through the continuous efforts of our engineers and workers, we minimized the cost, which deepen the Mr. John trust for us again.
The third point is about brake. In general, the electric brake is common type. What Mr. John need the electromagnetic clutch brake. With continuous technological innovation, we have rich experience in deploying this type of brake. That means the parts of our electric winches have much longer service life. After seeing our design drawing of brake connected motor. Mr. John was quite satisfied and said this was what he was keeping looking for.
By solving the three points, we and our no-standard electric winch completely won the trust of Mr. John. The number of products purchased has also increased from one to three. In the actual use later, he once again highly praised the quality of our winch. Two months later, the second order came.

QN20T Double Girder Overhead Crane With Grapple Hook To Pakistan

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As an excellent crane manufacturer and supplier in China, Dongqi Group has customers all over the world, Pakistan is one of our main crane business countries.

The customer in Pakistan runs a steel mill and has purchased crane equipments for many times. In 2016, they purchased 9 bridge cranes and electromagnets. In the meantime, we maintained effective communication with customers and answered customer questions during bridge crane installation and after-sales service. In 2020, customer purchased QN 20T double girder overhead crane again, and the customer will be equipped with electromagnets and grabs.
The two bridge cranes will be installed in the scrap plant for grabbing/extracting scrap iron, so they choose the QN type overhead crane.
QN double girder overhead crane with grab hook is on the basis of QD, a cable reel installation position is reserved on the trolley for powering the grab (usually an electro-hydraulic grab) or electromagnet. At the same time, the electrical cabinet also reserves a cable reel connection port. All electrical components are also larger than the general QD model bridge crane when matching, and the power of hydraulic grab and electromagnet should be considered.
The other parts are the same as QD, the bottom is the hook, which can be hung with electromagnet or hydraulic grab

Our engineers believe that this model is more flexible to use, it can lift general heavy objects, and can also be installed with grabs or electromagnets to lift scrap iron. The difference from QZ (Grab Bridge Crane) is that QZ is equipped with a grab bucket by default, without hooks. The wire rope from the reel is directly connected to the pulley of the grab bucket to grab loose and broken items. Such as sand, coal, etc. The structure is shown in the figure on the right. Similarly, there is QC (electromagnetic bridge crane), which is equipped with electromagnets instead of hooks by default, and QL (electromagnetic hanging beam bridge cranes)

After communication, the customer choosed QN 20T Double Girder Overhead Crane With Grapple Hook and took the order soon. After we confirm the order, we will produce and ship as soon as possible.

Our experienced crane engineers can design the most suitable crane according to your working conditions, and good quality with best price for you，waiting for your inquiry!

Dongqi Group QZ & QD Double Girder Overhead Crane Shipped to the Steel Mill in India

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India is located in southern Asia, which is the largest country in the South Asian subcontinent. India is rich in mineral resources, with bauxite reserves and coal production both ranking fifth in the world, and mica exports account for 60% of world exports. India’s steel mills are mainly located in the northeast, mainly Kolkata, because the steel industry is an industry that has a large demand for coal and iron ore, and is often located close to coal and iron ore bases.

The client is a VP of a relatively large steel plant in India, mainly responsible for project procurement. The company was established in 2004 makes products like Pig Iron, Sponge Iron, Billets, TMT Bars, Wire Rods and Ductile Iron Pipes. It consists of a Sinter Plant, Pellet Plant, Blast Furnace, Power Plant, Steel Melting Shop and Rolling Mill.

We got this the first inquiry in June 2019, he took small bridge crane and hoist. Our salesmanager used the understanding of the customer’s technical preferences from the first negotiation process to quickly give accurate feedback, professionally provide customers with quotations and various after-sales services, finally we got the the customer’s appreciation and trust. He bought 8 sets of QZ and 1 set of QD double girder overhead crane. QZ is used to grab iron ore fines concentrate. QZ double girder overhead crane With Grab is widely used in power station, storage, smelting workshop of steel mill, port, cement plant, and waste recycling station, etc. to load and unload scattered objects. The grab crane has a high requirements on heat, dust, and aggressive environment.
QD overhead crane is used for equipment maintenance. Crane is widely used to load and transport normal weight in the fixed crossing space and in various special purpose hoists in special operations.
The initial inquiry contains the speed and work level of each organization, so the selection is straightforward.

The selection of the QZ grab Crane needs to be determined by the density and volume of the material, and finally the four-rope grab bucket is selected, as shown below:

Dongqi is a professional crane manufacturer supply a series of products, such as, various kinds of cranes, hoists and other lifting equipment and spare parts, and our product line consists: Overhead Bridge Cranes, gantry cranes, jib cranes, ,Port Cranes & Container Cranes, European Electric Hoists we can design the most suitable crane according to your working conditions, etc.
Any inquiry, welcome to consult

4pcs DRS250 Wheel Blocks Exported to Singapore

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Item: DRS250 whee block
Quantity: 4pcs
DRS Wheel Blocks(wheel diameter 250mm) DRS250
Wheel model: DRS250-A65-A-75-K-X-A50 — 2pcs
Wheel model: DRS250-NA-A-75-K-X-X — 2pcs
Max wheel load: 160KN
Self weight: 61kg
The wheel material QT700, quenched and tempered treatment
Wheel block material: QT500

October 8th, we received the inquiry from our old customer in Singapore.

This customer is also in the crane industry, so the inquiry is firm and communication is quick.

Based on the DRS250 wheel block model customer provided, we prepared our quotation. After a very short discussion, 4 days later, our customer sent us the purchase order.

Since the customer is in urgent demand of the product, the same day we received the PO, we sent customer the final confirmation drawing of the DRS wheel block.

After we received customer’s confirmation, the production start, now the goods have already been delivered to Shanghai port and the estimated sailing time is Nov. 22nd.

And another good news to share, if you are in urgent demand of the DRS wheel blocks, the production of the standard type can be finished within 14 working days.

 

2sets of 130t Crane Hook Groups For Sale to Europe

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Detailed Specifications For Crane Hook Groups:
30Cr2Ni2Mo hook material
M5 duty group
Used for Reach stacker

This is also one crane hook order from our client Kalmar, and thanks a lot for their trust and support again!

This crane hook is designed based on client’s detailed requirments. And it was delivered to client’s factory in China.

Here share three hook photos with you:

Finished 130t hook groups in our factory:

We are looking forward to your inquiry! And we can quote the price for you based on the detailed hook drawing, or it is okay if you just have the hook photo and some sizes, we will try our best to support you and hope to cooperate with you in the near future and for long time!

How does bridge cranes work?

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When it comes to moving large goods or exceptionally big loads through a production facility, a bridge crane is far more convenient and efficient than navigating corridors and floor space. Bridge cranes are capable of safely lifting extremely big loads and can raise, descend, and travel horizontally along a rail or beam. An operator uses a pendant station or wireless control to regulate the crane’s travel and speed.

Bridge cranes can move weights from side to side, forward and backward, and cover a rectangular area. Though no two bridge cranes are same, they all have the same basic components, including a hoist, trolley, beams, girders, and control systems.

How bridge cranes work

Over the rectangular working area, the bridge of a bridge crane runs longitudinally along tracks built on runway beams. Steel girders are joined to runways at either end of the girders to form bridges.

Lifting Trolley – The lifting trolley contains the lifting mechanism, which includes a brake, motor, reducer, drum, and pulley set. The motor rotates a drum through a reducer, which then drives the wire rope or chain that raises and lowers the load.
Crane Driving Mechanism – A crane’s driving mechanism is made up of two sections. A long transmission drives both sides of the wheels, while a separate motor powers each pair of wheels separately.
Power Supply – Because there are so many distinct types of power systems, each with its own set of connections, power supply is a complicated subject. Conductor bars, festoon systems, and cable reels are the three most frequent varieties.Although there are variations of bridge cranes that function on pneumatic power, the bulk of bridge cranes are powered by electricity. The crane runway and bridge crane control are powered by cable festoons, conductor bars, or reel cables. The trolley and hoist are both powered by this power feed.
Conductor Bar — On the crane’s runway or monorail, a conductor bar system is installed. They’re suitable for runways with several bridges. Suppor is available.

Festoon System – A festoon system can be mounted on a track, an I beam, or a square rail. On a trolley that goes along the track, they employ flat or round cables. The cable hangs below the track and expands or retracts in response to the trolley’s position.

Cable Reel — Conductor cable is released, retrieved, and stored using spring-loaded or motorized cable reels. For mainline power along a runway or monorail, this method is employed.

Lifting Height-The type of engine and crane capacity are both affected by the height at which the crane is mounted. The lift height of a bridge crane is the distance from the ground to the hook’s saddle, which is an important measurement since it guarantees that the hook is not damaged.
Another significant consideration is the C dimension, which refers to the hook’s maximum lifting height. The C dimension refers to the distance between the trolley wheels and the hook saddle.

Controls – For safety and convenience of operation, each aspect of a bridge crane’s movements is controlled by safe crane controls, including the pendant control, Remote Control or cabin control or automatic control with software and electronics that work in tandem. The operator of a bridge crane has complete control over the load at all times. A start and stop button is the most basic kind of control, although more complicated controllers use joysticks and tablets to program a larger range of motions and movements. The crane’s restrictions, which determine what it can accomplish and where it may move, are programmed into the controls. Control systems give statistics on utilization, diagnostics, and ways for preventing operational problems.
Hoists- Chain and wire hoists are the two most used types of hoists for bridge cranes.
A Chain Hoist is designed to raise loads of less than 10 tons and is held in place by a chain holder. They offer genuine vertical lift, rising straight up without lateral drift.
Wire Rope Hoists are capable of lifting 10 tons or more and wrap around the weight. They provide you more choices and more flexibility. Wire rope hoists, unlike chain hoists, are prone to lateral movement.

How to Install a Single Girder Overhead Crane?

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How to install a Single Girder Overhead Crane? 5 ton single girder overhead crane installation procedures for reference. Overhead crane installation. It is critical to make the overhead crane installation process safe and orderly, which must be planned, organized, and built step-by-step in order to assure smoothness of single girder overhead crane installation. Each job employee must be aware of the following construction plan and be able to apply it with ease:

1. Site selections for installation

The site space of a single girder overhead crane installation should be sufficient to fulfill the needs of an overturn lifting installation, as well as the ability to plug in welding machines and other electric tools.

2. Equipment and tool preparation

Two sets of welding machines, two sets of oxygen acetylene, two sets of manual chain hoists, a cushion wooden ladder, lifting equipment, and a truck crane are required for the project.

3. Material preparation

This project requires a single girder overhead crane crane rail, platen, clamp, steel material for producing a single girder overhead crane baffle, slide wire, and welding rod, all of which must be prepared in advance.

4. Working staff involved.

Determine how many people will be involved in this project: One electrician, one fitter, one riveter, one welder, one lifting worker, and one safety/head.

5. Basic safety requirements

Construction staff must closely adhere to the standards of safe operation of each type of construction activity in order to participate in this project; illegal operations are prohibited.

Gantry Crane Overview: All About Gantry Cranes

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What is a gantry crane? A gantry crane is a type of overhead travelling crane that is supported by freestanding legs that travel on wheels or along a track or rail system. When overhead bridge crane is impracticable, gantry cranes are frequently considered.

Gantry cranes are commonly employed in outdoor applications or as a supplement to an existing bridge traveling crane system. A gantry crane, unlike a bridge crane, does not require permanent runway beams and support columns because it is not attached to the building’s support structure. When compared to a comparably specified bridge crane, this can result in considerable material cost savings and be a more cost-effective alternative.

Larger gantry crane systems may run on a ground rail or track, usually in a straight line in a specialized work area. Smaller Portable Gantry Cranes has a access to anywhere in your facility on castors or wheels for maintenance or small fabrication operations.

What are the best features of quality cranes?

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Motorization options are available with a branded material handling system. You can consider motorization depending on your requirements. You may have purchased manual cranes as your first purchase. You have, however, discovered the necessity to motorize them over time. As a result, reputable crane manufacturers provide you with unique motorization alternatives.

You must work with the tip of a jib crane if you are utilizing one. Its jib boom allows you to move the weight using only your hands. However, this level of leverage is not appropriate in every situation. As a result, you can take your time deciding on the motorization package given by China’s leading crane businesses.

Finally, we must emphasize the importance of ergonomics and worker safety. As a result, our country’s manufacturing and construction industries have relied on the usage of motorized cranes to lift loads. The simple addition of motorized systems to cranes will provide the most benefit to your employees. To establish a deal, you can start by identifying your load lifting requirements.

You can talk to our sales team about the motorization packages when purchasing cranes. You can make the best decision based on the information.