CN109399256B

CN109399256B - Wet material unloading method for ship unloader of large bulk cargo wharf

Info

Publication number: CN109399256B
Application number: CN201811189322.XA
Authority: CN
Inventors: 李伟伟; 陈耀忠; 周俊明; 柴彬; 傅可杰
Original assignee: MCC Baosteel Technology Services Co Ltd
Current assignee: MCC Baosteel Technology Services Co Ltd
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2021-05-14
Anticipated expiration: 2038-10-12
Also published as: CN109399256A

Abstract

The invention provides a wet material unloading method for a ship unloader of a large-scale bulk cargo wharf, which comprises the following steps: s1, controlling the grab bucket to grab wet materials from the storage hopper, and stopping the grab bucket above the hopper after grabbing the wet materials; s2, opening the grab bucket at a low speed, and enabling wet materials in the grab bucket to flow out into the hopper slowly; s3, after the wet material in the grab bucket flows for a preset time, closing the grab bucket until the wet material in the hopper is completely discharged; s4, repeating the steps S2 and S3 until the wet materials in the grab bucket are completely discharged; and S5, repeating the steps S1 to S4 until the unloading of the wet materials in the storage bin is finished. The invention controls the operation time and the operation mode of the grab bucket and the vibration feeder, so that the situations of material overflow and over flow at the inner part of the ship unloader can be avoided, the stable and efficient unloading process of wet materials is ensured, and the stable operation of the equipment is facilitated.

Description

Wet material unloading method for ship unloader of large bulk cargo wharf

Technical Field

The invention relates to the field of unloading of ship unloaders, in particular to a wet material unloading method of a ship unloader of a large-scale bulk cargo wharf.

Background

The ship unloader is a special machine which is made of a continuous conveying machine and can lift a machine head of bulk materials, or has the self-taking capability, or is matched with a taking and feeding device to continuously lift the bulk materials out of a cabin, then unloads the bulk materials to an arm support or a rack and can convey the bulk materials to a local conveyor system of a main conveying system at the bank. The ship unloader can greatly improve the unloading efficiency, and the environment can be kept clean and efficient and environment-friendly due to the minimum dust pollution.

When the outer wheel of the large bulk cargo wharf works to the middle lower part, the mineral aggregate in the cabin is gradually presented into slurry and irregular puddle at the bottom of the cabin, which brings troubles to the next unloading operation. The quality of the iron ore is seriously influenced, and certain damage is caused to downstream equipment. When the situation is abnormal, a vicious fault event that wet materials in a hopper of the ship unloader are intensively leaked down to destroy an internal steel frame structure occurs.

The conventional operation method of the bulk cargo wharf ship unloader is to open a grab bucket after the grab bucket grabs and picks materials above a hopper through semi-automatic circulation, and the conventional operation method of wet material operation has the following defects: the situations of a large amount of flash and over flow at the inner part of the ship unloader are easily caused, and the stable and smooth running of the equipment is not facilitated; the grabbing operation without restraint can also cause material pressing, slipping and deviation of a ground conveying system and overflow of a large part of wet materials, so that abnormal scattering along the belt is caused.

The conventional operation causes the following hidden troubles:

1. the consequence of flash: the abnormal scattering along the belt leads to serious mineral aggregate waste and pollution to the surrounding environment.

2. Equipment damage: the wet material in the hopper of the ship unloader is intensively discharged downwards to wash down the steel frame structure in the ship unloader.

3. The operation efficiency is as follows: the wet material is discharged from the feeder to the short-distance conveying belt in the machine instantly, so that the pressing material of the belt in the machine cannot be started, and the machine is stopped for flushing.

4. And (4) safety factor: the built-in inspection personnel have potential safety hazards in inspection in operation.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a wet material unloading method of a ship unloader of a large-scale bulk cargo wharf, so as to overcome the defects in the prior art.

In order to achieve the aim, the invention provides a wet material unloading method of a large-scale bulk cargo wharf ship unloader, which comprises the following steps:

s1, controlling the grab bucket to grab wet materials from the storage hopper, and stopping the grab bucket above the hopper after grabbing the wet materials;

s2, opening the grab bucket at a low speed, and enabling wet materials in the grab bucket to flow out into the hopper slowly;

s3, after the wet material in the grab bucket flows for a preset time, closing the grab bucket until the wet material in the hopper is completely discharged;

s4, repeating the steps S2 and S3, and finishing discharging wet materials in the grab bucket;

and S5, repeating the steps S1 to S4 until the unloading of the wet materials in the storage bin is finished.

Preferably, in step S2, emptying the excess material in the hopper, controlling the opening degree of the hopper door in the hopper, stopping running the vibrating feeder, then slowly opening the grab bucket, and slowly flowing out the wet material in the grab bucket into the hopper; in step S3, after the grab bucket is closed for a predetermined time, the wet material with a higher water content in the wet material flows out first, and then the vibratory feeder is started to deliver the remaining wet material until the wet material in the hopper is discharged completely.

Preferably, in step S4, the grab bucket (1) is opened and closed three to four times, and the wet material in the grab bucket is discharged.

Preferably, the opening degree of the hopper door in the hopper is controlled to be 20% -30%.

Preferably, the grab buckets 3s-6s are closed, so that wet materials with higher water content in the wet materials flow out firstly.

Preferably, the vibration feeder is started at a frequency of 35% to 45%.

Preferably, the opening distance of the grab bucket is 45-55cm when the grab bucket is opened.

Preferably, the ship unloader is taken out for unloading the dry materials, and the dry materials and the wet materials are mixed and stirred to form a mixture for conveying.

As mentioned above, the wet material unloading method of the ship unloader for the large bulk cargo wharf, which is related by the invention, has the following beneficial effects: the invention controls the operation time and the operation mode of the grab bucket and the vibration feeder, so that the situations of material overflow and over flow at the inner part of the ship unloader can be avoided, the stable and efficient unloading process of wet materials is ensured, and the stable operation of the equipment is facilitated.

Drawings

FIG. 1 is a schematic view showing a state of grabbing wet materials according to the present invention.

Fig. 2 is a schematic structural view of the hopper.

FIG. 3 is a schematic view showing a state where dry materials and wet materials are mixed.

Description of the element reference numerals

1 grab bucket

2 stock bin

3 hopper

31 hopper door

32 vibration feeder

33 charging area

34 internal belt

35 chute

4 drying material

5 Wet material

6 mixing hopper

7 mixture

8 ground belt conveying system

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship may be made without substantial technical changes.

As shown in fig. 1 to 2, the present invention provides a wet material unloading method for a large bulk cargo wharf ship unloader, comprising the steps of:

and S1, controlling the grab bucket 1 to grab wet materials from the storage hopper 2, and moving the grab bucket 1 to the position above the hopper 3 after grabbing the wet materials and stopping stably.

S2, opening the grab bucket 1 at a slow speed, enabling wet materials in the grab bucket 1 to flow out into the hopper 3 slowly, and enabling the grab bucket 1 not to be opened completely, otherwise, the materials are prone to overflow and spilling, wherein the opening distance of the grab bucket 1 is 45-55cm, and preferably 50cm when the grab bucket is opened.

S3, after the wet material in the grab bucket 1 flows for a preset time, until the mud material in the bucket 3 flows out, usually 3S-5S, closing the grab bucket 1 until the wet material in the bucket 3 is discharged.

S4, repeating the steps S2 and S3, and carrying out the step of emptying the grab bucket 1 until wet materials in the grab bucket 1 are completely emptied, generally carrying out the step three to four times, completely emptying the wet materials in the grab bucket 1, and adopting a mode that the grab bucket 1 discharges materials for multiple times, so that on one hand, the wet materials in a hopper of the ship unloader are prevented from being intensively discharged downwards to damage an internal steel frame structure, and on the other hand, the phenomenon of material overflow is reduced.

And S5, repeating the steps S1 to S4 until the wet material in the storage bin 2 is unloaded.

Preferably, in step S2, the excess material in the hopper 3 is emptied, the opening of the hopper door 31 in the hopper 3 is controlled, the operation of the vibratory feeder 32 is stopped, then the grab 1 is opened slowly, the wet material in the grab 1 flows out slowly into the hopper 3, and the situation that the wet material leaks down to the short-distance conveyor belt in the machine from the feeder instantly when the vibratory feeder 32 operates, so that the material pressing of the belt in the machine cannot be started, and the machine is stopped for washing is avoided. In step S3, after the grab bucket 1 is closed for a preset time, the wet material with a higher water content in the wet material flows out first, and then the vibratory feeder 32 is started to convey the remaining wet material until the wet material in the hopper 3 is discharged, the time for closing the grab bucket is preferably 3S-5S, at this time, most of the wet material with a higher water content in the wet material flows out of the hopper 3, so that the water content of the remaining wet material further decreases, and the phenomena of material pressing, slipping and deviation of a subsequent ground conveying system are avoided.

Preferably, the opening degree of the hopper door 31 in the hopper 3 is controlled to be 20-30%, the opening degree of the hopper door 31 is preferably 25%, most of wet materials with high water content flow out of the hopper 3 firstly, and the rest of wet materials are positioned in the hopper 3. Preferably, the vibratory feeder 32 is activated at a frequency of 35% to 45%, preferably 40%, at which the wet material flows smoothly and slowly out of the hopper 3.

As shown in fig. 3, the wet material unloaded by the wet material unloading method of the large bulk cargo wharf ship unloader provided by the invention needs to be unloaded together with the dry material after being mixed and stirred, so that the moisture of the wet material is reduced, on one hand, the situations of overflowing and scattering along the line are reduced, on the other hand, the skid and deviation of the ground belt conveying system 8 are avoided, the ship unloader for unloading the dry material and the ship unloader for unloading the wet material have the same structure, specifically referring to fig. 1 and fig. 2, the mixing ratio range of the dry material and the wet material is 1:1, usually, one ship unloader grabs the dry material in two bins, and the other ship unloader grabs the wet material in one bin, on the ground belt conveying system 8, the dry material 4 is unloaded firstly, the wet material 5 is unloaded, the dry material 4 is positioned on the upper layer, the wet material 5 is positioned on the lower layer, the dry material and wet material stirring is performed on the ground belt conveying system 8, and then the wet material is fed into.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A wet material unloading method of a large-scale bulk cargo wharf ship unloader is characterized by comprising the following steps:

s1, controlling the grab bucket (1) to grab wet materials from the storage bin (2), and stopping the grab bucket (1) above the hopper (3) after grabbing the wet materials;

s2, opening the grab bucket (1) at a low speed, and enabling wet materials in the grab bucket (1) to flow out into the hopper (3) slowly;

s3, after the wet material in the grab bucket (1) flows for a preset time, closing the grab bucket (1) until the wet material in the hopper (3) is completely discharged;

s4, repeating the steps S2 and S3 until the wet materials in the grab bucket (1) are completely discharged;

and S5, repeating the steps S1 to S4 until the wet material in the storage bin (2) is unloaded.

2. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 1, wherein: in step S2, emptying the excess materials in the hopper (3), controlling the opening degree of a hopper door (31) in the hopper (3), stopping running the vibration feeder (32), slowly opening the grab bucket (1), and slowly discharging the wet materials in the grab bucket (1) into the hopper (3); in step S3, after the grab bucket (1) is closed for a preset time, the wet material with a higher water content in the wet material in the hopper (3) flows out first, and then the vibration feeder (32) is started to convey the residual wet material until the wet material in the hopper (3) is completely discharged.

3. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 1, wherein: in step S4, steps S2 and S3 are repeated to open and close the grab bucket (1) three to four times, and the wet material in the grab bucket (1) is completely discharged.

4. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 2, wherein: the opening degree of a hopper door (31) in the hopper (3) is controlled to be 20-30%.

5. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 2, wherein: in step S3, the grab bucket (1)3S-5S is closed, so that the wet material with higher water content in the wet material in the bucket (3) flows out first.

6. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 2, wherein: the vibration feeder (32) is started at a frequency of 35% to 45%.

7. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 2, wherein: the opening distance of the grab bucket (1) is 45-55cm when the grab bucket is opened.

8. The wet material unloading method of the large bulk cargo wharf ship unloader of claim 2, wherein: and taking the ship unloader to unload the dry materials, and mixing and stirring the dry materials and the wet materials to form a mixed material for conveying.