The New Idea of Zhengzhou Huazhong Construction Machinery Co., Ltd

HZQ59/80 launching girder

The bridge crane is a kind of lifting machinery that are widely used in the construction field, industrial and mining establishments as well as the port. It will not be influenced by the obstacles on the ground. What’s more, it can lift objects and materials under itself, which makes great contribution to the modern industry production, objects lifting and transportation.

With the popular tendency that the safe production and management is paid more attention to, to the manufacturer of bridge crane, the product of high quality and applicable technical specification are very important to them. Since the establishment of Zhengzhou Huazhong Construction Machinery Co., Ltd, to meet the need of this industry, it increases its investment gradually and as a result, it achieves a lot of accomplishment. The first 1200t crane in China is made by Zhengzhou Huazhong Construction Machinery Co., Ltd. Also, the patented honeycomb girder crane is from Zhengzhou Huazhong Construction Machinery Co., Ltd. That’s also the reason why Zhengzhou Huazhong Construction Machinery Co., Ltd enjoys great reputation at home and even abroad, and gains the huge market.

The idea of Zhengzhou Huazhong Construction Machinery Co., Ltd is “endless innovation, cooperation and co-sharing”. It makes innovation ahead of the peer industry for many times, and makes great contribution to the healthy development of bridge crane industry.

The Operating Precautions of the Bridge-erecting Crane（Ⅱ）

HZQ900 overhead launching gantry

When there are the upper and lower longitudinal slopes, the preventing slipping measures should be taken when the bridge-erecting crane displaces longitudinally.
The bridge-erecting crane must lift objects to go on a run test after its’ assembly is finished. Alternatively, it can go on a run test with the concrete girder, after which the bridge-erecting crane can be in place and begin the assembly.
When the bridge-erecting crane is being assembled, the overall comprehensive safety inspection must be made with one hole finished. If any problem is found, the bridge-erecting crane must stop operating and can continue its operation with the problem addressed. It is not allowed to operate with the abnormal machine and electrical.
The bridge-erecting crane is not allowed to operate with overload and lift objects aslant.
The bridge-erecting crane is not allowed to operate with the wind level more than 6; its lifting trolley and itself must be fixed firmly with rigging; when it stops operating, the power should be cut off to prevent accidents from happening.
When the bridge-erecting crane finds its longitudinal place, the size of which must be strictly controlled to ensure that the concrete precast beam can be placed safely.

The Operating Precautions of the Bridge-erecting Crane（I）

Before the bridge-erecting crane walks longitudinally, the weld of the insulating steel of cross beam should be finished and the concrete should be placed in the insulating steel of cross beam. With all of those things meeting the design requirements, the bridge-erecting crane is allowed to walk longitudinally.
Before each girder is in place, the temporary support should be in both ends to make the large girder keep vertical and stable to avoid overturn and displacement. After the second girder is ready, the reinforcing steel of the two ends of the insulating steel of cross beam should be immediately welded except the temporary support to strengthen the stability.
?The height of the top surface of the walking longitudinal rail of the bridge-erecting crane should be the same to keep stable. The
transvrsal walking rails of the front, middle and back triggers should be paralleled and the certain distances among them should be kept.
Only with everything ready, the bridge-erecting crane is allowed to walk longitudinally, which is asked to be finished in one time without stop in the middle way.

How to Prevent Electric Hoist Winding Accidents from Occurring at Work (Ⅱ)

electric hoist

In response to the above problems, the people of Huazhong Construction Machinery Co., Ltd develop a simple method to effectively solve the problem of electric hoist. A locking ring is added in the inside flange, which prevents the rope for various reasons from being caught in the gap between the drum and the lifting motor, without compromising the performance of the drum and the assembly and use of the hoist motor.
In the production process, if the phenomenon of arbitrary justice appears, we can also employ a simple method to deal with the problem, such as the traction, increasing the load, etc. By that we can not only maintain the life of the hoist equipment, but also can increase the normal production.

The important purpose of Zhengzhou Huazhong Construction Co., Ltd features “Become Creative , Become Better”. Welcome to our company to buy the bridge building crane and we will provide sound service for you.

How to Prevent Electric Hoist Winding Accidents from Occurring at Work (Ⅰ)

electric hoist

The electric hoist is asked to be equipped when the customers buy the crane. Because it is the indispensible equipment that improves the work conditions and increases the work efficiency.
But the winding accidents of the hoist happen frequently when the hoist is used. Especially when the rope is caught in the gap between the drum and the lifting motor, what we can only do is to remove the motor and get the rope. The method is time-consuming, and laborious. What’s worse, it also delays the normal production; sometimes in order to maintain production, we will cut off the rope. But cutting the rope will cause easily the wear and motor housing. And the larger equipment can cause accidents.

The important purpose of Zhengzhou Huazhong Construction Machinery Co., Ltd features “Become Creative , Become Better”. Welcome to our company to buy the bridge building crane and we will provide sound service for you.

The Hidden Danger and Corresponding Preventive Measures of MSS（Ⅲ)

5. The assembly of the external mold
Hidden dangers：
(1)There is no protective guards and safe net.
(2)The lifting speed online casino is too fast.
Preventive measures：
(1) The protective guards and safe net should be set.
(2) The lifting speed should be controlled.

6. The preloading of the formwork and adjustment of the mold camber
Hidden dangers：
(1)The formwork and the mold camber cause some injuries. The formwork deforms and overturns.
(2)People fall off from the high place.
Preventive measures：
(1)The command should be unified.
(2)The safe belt should be well set.

The Hidden Danger and Corresponding Preventive Measures of MSS（Ⅱ）

3．The front and rear support cradle and their assembly
Hidden dangers：
(1)Two cranes influence each other.
(2)The objects falling off the cradle cause some injuries.
(3)People fall off from the high place.
Preventive measures：
(1)The command should be unified and the guide should be given in the field.
(2)The warning line should be set to prevent other people enter the certain area.
(3)The guardrail or safety belt should be set.

4. The assembly of the front and rear nose bridge
Hidden dangers：
(1)The loose of the bolts.
(2)The objects falling off the cradle cause some injuries.
Preventive measures：
(1)The torque detecting of the bolts should be conducted.
(2)The warning line should be set to prevent other people enter the certain area.

The Hidden Dangers and Corresponding Preventive Measures of MSS (Ⅰ)

1.The assembly of the main beam and cross beam
Hidden dangers：
(1)The flaw of the welding joint
(2)The loose or omission of the bolts
Preventive measures：
（1）The welding joint should be checked regularly.
（2）The torque detecting of the bolts should be conducted.

2.The lifting of the main beam
Hidden dangers：
(1)The carrying pole beam is not firm without enough bearing capacity.
(2)The falling off of the objects.
(3)There are no protective facilities for the operation in the air.
(4)The screw-thread steel is not clean.
(5)The oil top cannot work normally.
Preventive measures：
(1)The stability and bearing capacity of the carrying pole beam should be checked.
(2)The warning line should be set to prevent other people enter the certain area.
(3)The clean of the screw-thread steel should be ensured.
(4)The oil top should be checked frequently.

The Installing Method of the Hoist(Ⅱ)

electric hoist

2.The common installing methods
To avoid the overturn and slippery of the hoist in the work, the following common methods are usually employed.

(1)Fixed base: the hoist should be fixed on the base with the bolts buried underground,
and this method is suitable for the local long-term use.

(2)The hoist is fixed on the square timber with the timber in the front of the hoist to avoid slippery and the rear part of the hoist should add some weight to avoid overturn.

The important purpose of Zhengzhou Huazhong Construction Co., Ltd features “Become Creative, Become Better”. Welcome to our company to buy the bridge building crane and we will provide sound service for you.

The Installing Method of the Hoist(Ⅰ)

electric hoist

The electrical hoist is characterized by large lifting capacity, fast speed and high safety performance. And therefore, the electrical hoist is widely used in the lifting work.

1.Install the hoist in the unknown circumstances
(1)The hoist should be installed in the flat place with good vision for the convenience of the driver seeing the whole process of lifting and commander seeing the commander’s signal.
(2)The hoist should be installed in the field that is easy for it to fix firmly so that the construction can go easily.
(3)The central line of the guide pulley installed in the front of the hoist should be kept perpendicular to the center drum.