Screw type ship unloader manufacturers absorb, transport and unload material process and how to prevent failure

Screw ship unloader is a kind of ship unloader which takes materials from screw machine and uses vertical screw conveyor to lift. The common output is 500 ~ 2000t / h, which is used in many foreign countries, such as Belgium, Saudi Arabia, the United States and the Netherlands. Domestic ports include Guangzhou Xinsha port, Shanghai port and Huaneng Yueyang Dianguang port. They are mainly used for coal mine and chemical fertilizer unloading, and sometimes for grain unloading. At present, the main manufacturers of this kind of ship knowledge machine are Sweden Weite siwer-tell and Japan Sumitomo Heavy Machinery Co., Ltd.

The screw ship unloader is mainly composed of vertical arm, horizontal arm, rotating tower, end screw conveyor and gantry. The vertical arm includes box cover and vertical screw conveyor. The vertical screw conveyor is composed of inner screw and outer screw. The inner screw is used to lift materials vertically and the outer screw is used to loosen and supply materials. The horizontal arm consists of two parts: box boom and horizontal screw conveyor.

Advantages: light structure, completely sealed, good performance, can better prevent dust leakage and noise pollution, easy to operate, low labor intensity of field personnel, more suitable for less mobile materials (such as agglomerated materials) unloading, compared with the same productivity unloading, its weight is the lightest.

1、 Reasonable selection of wire rope diameter of screw ship unloader 1) selection coefficient method 2) safety coefficient method, in which the material, rotation direction, rope core texture and structure of wire rope of ship unloader should be selected reasonably. The wire rope of line contact ship unloader should be selected, and the wire rope of ship unloader with anti rotation ability should be selected.

Screw unloader suction conveying unloading material process and how to prevent failure

2、 The steel wire rope of ship unloader must be selected according to the current new standard of steel wire rope of ship unloader.

3、 The steel wire rope sleeve of ship unloader (such as pear shaped head rope sleeve) must be selected reasonably. When fixing the steel wire rope of ship unloader in the rope sleeve, the regular manufacturer must be selected for processing, and the strict inspection after production must be done to ensure that the steel wire rope of ship unloader is firm inside the rope sleeve and does not loose.

4、 When threading the steel wire rope of the drum ship unloader, we must work in strict accordance with the drawings. The steel wire rope of the ship unloader must be set according to the number. During this period, we must ensure that the steel wire rope of the ship unloader does not appear artificial or self knot deformation on the ground. After putting on the wire rope of the ship unloader, let the wire rope of the single drum ship unloader rotate for 2-3 times with no load to release the residual torque of the wire rope of the ship unloader.

High efficiency: high filling coefficient, often close to full load: due to the installation of a unique feeding device (reverse reclaiming screw head), the filling coefficient can be as high as 70 ~ 90%; Secondly, the screw machine can often work close to full load: its vertical arm can rise, fall and swing with the boom's pitch, and can rotate 100 degrees with the rotating tower. With the traveling function of the ship unloader, the reclaimer head can reach all corners of the warehouse flexibly, so it can realize continuous ship unloading operation. Its average productivity utilization coefficient is 75%, and it can reach 95% when unloading cement.

Before threading, the connection between the two free ends of the steel wire rope of the ship unloader should not be fixed first. The two free ends of the steel wire rope of the ship unloader should not be fixed until all parts of the steel wire rope of the ship unloader are in place naturally and the kink of the steel wire rope of the ship unloader is the smallest. At the same time, when installing the steel wire rope of ship unloader, we should follow the left-hand rule and the right-hand rule. We must wind the steel wire rope according to the direction of tight twisting rather than loose twisting. Otherwise, the steel wire rope of ship unloader is easy to appear the phenomenon of "twisting and loosening" in the process of using, which seriously affects the life of the steel wire rope of ship unloader.

The screw unloader can be used to unload all kinds of powdery, granular and massive materials, including chemical fertilizer, grain, sulfur, coke, cement, phosphate rock powder, sugar, phosphate, coal, etc. the maximum allowable block size (for coal) has reached 350mm; For the materials easy to form hard shell, such as cement, chemical fertilizer, potash, etc., its reclaiming head is a reverse spiral, which has the function of loosening and reclaiming, and can automatically dig in and reclaim materials, so as to meet the needs of ship unloading; As for the easily damaged materials such as grain unloader, the breakage rate of the screw unloader is 4-6% lower than that of the pneumatic unloader (vacuum suction grain unloader) in Europe, and it can maintain the germination ability of grain and improve the economic benefits of grain depot.

5、 The structure of the drum and pulley must be reasonable. Within the scope of technical requirements, the diameter of the pulley and drum can be slightly increased to reduce the bending stress of the wire rope of the ship unloader. Small cargo damage and environmental pollution: the whole conveying system of the screw unloader is fully enclosed, which can not cause dust and material leakage during operation, and will not cause air pollution. In addition, the noise during operation is also small, and the sound level can be controlled below 55dB (a).

6、 The driver of ship unloader should operate in a standard and safe way, not in a wild way. To reduce the deformation of wire rope of ship unloader caused by human factors.

7、 In order to improve the service life of wire rope of ship unloader, in the winding system of wire rope of ship unloader, the bending times of wire rope of ship unloader should be reduced as far as possible, especially the reverse bending times of wire rope of ship unloader. The fatigue damage degree of wire rope of ship unloader caused by reverse bending is twice of that caused by positive bending.

8、 The maintenance of steel wire rope of ship unloader should be strengthened. The steel wire rope of ship unloader that needs lubrication must be well lubricated.

9、 Regularly inspect the steel wire rope of ship unloader, timely remove the faults that damage the steel wire rope of ship unloader, and eliminate the potential safety hazard. It has a good protection system, and can adapt to the conditions of ship bumping caused by waves and floating with the unloading ship. The grooving machine has the characteristics of compact structure, beautiful appearance, simple and flexible operation. In the process of use, attention should be paid not to use in corrosive and explosive environment. And to protect the ground wire, turn on the power supply to ensure that the supply voltage is consistent with the rated voltage.

It is not allowed to disassemble any parts of the instrument in the use of the project. Only when the power supply is cut off and all the air sources are turned off can routine maintenance, repair or fuse replacement, internal cleaning and fault repair be carried out. When cleaning the outside of the equipment, it is also necessary to pay attention to whether there is high temperature. You must wear gloves or cool down before cleaning. It is forbidden to open the chassis at ordinary times to avoid electric shock. Before starting the machine, the connection between the connecting parts must be checked to see if it is loose. The AC power supply and air source should be intervened when there is no abnormality. Only after the power and gas supply is normal can the machine be started. After power on, determine whether each component works normally, and operate normally only when there is no abnormality. In the process of using, there is also the maintenance of the main equipment. Before starting the machine every day, it is necessary to check whether the air pressure is normal and whether the cylinder works well. And regularly check whether the circuit and safety tube are loose or damaged. If so, it can be locked or replaced by a specially assigned person in time. After the operation, please turn off the power and air source in time, and regularly clean the equipment and check the parts.