JPH0415708Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to an unloader equipped with a cleaning device, and is mainly used to suction powder and granular cargo such as grains and minerals carried on board ships. The present invention relates to an unloader equipped with a cleaning device for unloading from a ship's hold by pneumatic transportation.

[Background of the idea]

Conventionally, this type of unloader generally consists of a suction-type pneumatic transportation device that suctions and transports powder and granular material loaded on a ship, etc., and a suction-type pneumatic transportation device that transports the powder and granular material that has been transported by this device. It is configured in combination with a conveyor transport device.

Various types of unloaders are used as the conveyor transport device, but when a belt-type or chain-type conveyor is used, powder particles inevitably remain on the conveyor due to the structure of the conveyor. In addition, in an unloader equipped with the conveyor transport device, if the residual powder is grain, it will rot and accelerate the corrosion of the conveyor, so the conveyor must be cleaned frequently and the cleaning operation takes a long time. There were flaws.

[Purpose of invention]

The present invention was developed in view of these circumstances, and includes a cleaning device that uses the suction blower of the main pneumatic transportation device to collect and discharge the powder and granules remaining in the mechanical transportation device. The purpose is to provide an unloader.

[Summary of the idea]

In order to achieve the above object, the present invention provides an unloader comprising: a pneumatic transport device having a receiver tank communicating with a suction blower; and a mechanical transport device disposed on the outlet side of the pneumatic transport device. The cleaning nozzle is provided in a transportation device and communicates with a cleaning pipe that communicates with a suction blower of the air transportation device via the receiver tank.

〔Example〕

Hereinafter, preferred embodiments of an unloader equipped with a cleaning device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an unloader equipped with a cleaning device according to an embodiment of the present invention, and reference numeral 10 in the figure indicates the unloader equipped with the cleaning device.

The unloader 10 equipped with the cleaning device includes a pneumatic transport device for fluidly transporting powder and granules, and a belt conveyor provided at a stage downstream of the pneumatic transport device for further transporting the powder and granules from the pneumatic transport device. , and a cleaning device provided between the belt conveyor and the pneumatic transport device.

The air transport device has a suction nozzle 12 that is a suction port for the material, a transport pipe 14 for powder and granular material that communicates with the suction nozzle 12, and the transport pipe 14 communicates with each other.
It is configured by providing a receiver tank 20 whose upper end communicates with the suction blower 16 via a suction pipe 18.

The suction pipe 18 is provided with an atmospheric suction valve 22 between the suction blower 16 and the receiver tank 20 for adjusting negative pressure during cleaning.

In the receiver tank 20, there is a bag filter 24 at the upper end for preventing the powder from being sucked into the suction blower 16, and a bag filter 24 at the lower end for discharging the powder to the belt conveyor 30 which is a succeeding machine. A discharge pipe 26 is provided, and each discharge pipe 26 is further provided with a discharge rotary valve 28 for adjusting the discharge of the powder or granular material.

The belt conveyor 30 is driven by a motor (not shown).
A belt or chain, etc. (not shown) connected to
It is operated by.

The cleaning device is provided between the pneumatic transport device and the belt conveyor, and includes a cleaning pipe 32 communicating with the vicinity of the lower end of the receiver tank 20, a cleaning valve 34 provided in the cleaning pipe 32, and a cleaning valve 34 connected to the belt conveyor. 30, the cleaning pipe 3
2 and a cleaning nozzle 36 communicating with the cleaning nozzle 36.

The cleaning valve 34 is opened when cleaning the belt conveyor 30, and the cleaning nozzle 36 is connected to the cleaning pipe 32 and the receiver tank 2.
0, a bag filter 24, and a suction pipe 18 in order to communicate with the suction blower 16, and furthermore, the cleaning nozzle 36 is connected to the tail side of the belt conveyor 20 to cover the residual powder and granules. ) are provided facing the belt conveyor 30.

Next, the operation of the unloader 10 including the cleaning device having the above configuration will be explained.

First, when the unloader 10 equipped with the cleaning device for transporting powder and granular materials is started, the atmospheric suction valve 22, the cleaning valve 32, and the discharge rotary valve 28 are opened, and the suction blower 1 is opened.
6 is operated to create a negative pressure in the receiver tank 20, and using this negative pressure, the powder and granules are sucked through the suction nozzle 12 and sucked into the receiver tank 20 via the transport pipe 14, thereby pneumatically transporting the powder and granules. Do this.

Next, the granular material sucked into the receiver tank 20 is drawn by the suction pipe 18 at the upper end and moves upward, but is blocked by the bag filter 24, descends, and is accumulated in the tank.

Furthermore, when the powder and granules accumulated in the tank exceed a certain amount, the unloader 10 equipped with a cleaning device opens the discharge rotary valve 28 to discharge the powder and granules from the discharge pipe 26 onto the belt conveyor 30. 30 and move the powder to the arrow 38 in the figure.
Transport in the direction.

Next, the unloader 10 equipped with the cleaning device
After carrying out the powder or granular material or when there is a loss time such as changing the hatch, the suction nozzle 12 is closed, the cleaning nozzle 36 is opened, and the suction is performed while adjusting the opening/closing state of the atmospheric suction adjustment valve 22. Operate the blower 16. In the unloader 10 equipped with a cleaning device, the inside of the receiver tank 20 becomes negative pressure as the suction blower 16 operates, so powder and granules spilled from the belt of the belt conveyor 30 and remaining in the casing etc. are removed by the cleaning nozzle 36. from the receiver tank 2 through the cleaning pipe 32.
Collect within 0.

Next, the powder and granules collected in the receiver tank 20 are drawn toward the suction pipe 18 inside the tank 20 and rise, but as before, they are blocked by the bag filter 24 and descend, and accumulate in the tank 20. be done.

Next, the unloader 10 equipped with a cleaning device stops the suction blower 16 and cleans the receiver tank 2.
0 is returned to atmospheric pressure, the residual powder accumulated in the tank 20 is discharged from the discharge pipe 26 into the outside of the unloader 10 equipped with a cleaning device, that is, into the conveyor 30 by opening the discharge rotary valve 28. do. Thereafter, the suction blower 16 is operated to make the inside of the receiver tank 20 a negative pressure, the discharge rotary valve 28 is stopped, and the cleaning valve 34 is opened to remove the powder and granules in the belt conveyor 30 from the cleaning pipe 3.
2 and into the receiver tank 20, the powder particles remaining in the casing of the belt conveyor 30 etc. can be cleaned by suction and discharge.

Therefore, the unloader 10 equipped with the cleaning device
To easily clean the succeeding belt conveyor 30 in a short time by effectively utilizing the suction blower 16 of the pneumatic conveying device, which is the main machine of this device 10, to change the hatch in which powder or granules cannot be transported. I can do it. At this time, the opening and closing of the cleaning valve 34 and the like can be controlled remotely using a control device from an operator's cab (not shown), or can be controlled in person.

In the above embodiment, a case was described in which a belt conveyor was provided after the pneumatic transport device, but the present invention is not limited to this, and other types of mechanical devices such as bucket elevators and chute etc. This can also be implemented when a transportation device is provided.

Further, the cleaning nozzle in the above embodiment can be changed in shape, mounting position, etc. as appropriate depending on the type of mechanical transport device or the mounting state.

[Effect of idea]

As explained above, in an unloader equipped with a cleaning device according to the present invention, a suction type pneumatic transport device and a mechanical transport device provided on the outlet side of the pneumatic transport device are provided. A cleaning nozzle is provided in the air transport device, and the cleaning nozzle and the pneumatic transport device are communicated with each other, so that the residual powder in the mechanical transport device can be collected and discharged by suction using the suction blower in the pneumatic transport device. Therefore, cleaning time can be shortened, and lost time such as changing hatches can be effectively utilized to improve work efficiency.

Furthermore, since the present invention utilizes the suction blower of the pneumatic transport device as is, it can be easily manufactured.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an unloader equipped with a cleaning device according to an embodiment of the present invention. 10... Unloader equipped with a cleaning device, 16...
...Suction blower, 20...Receiver tank, 3
0... Belt conveyor, 32... Cleaning pipe, 34...
...Cleaning valve, 36...Cleaning nozzle.

Claims (1)

[Claims for Utility Model Registration] An unloader comprising: a pneumatic transport device having a receiver tank communicating with a suction blower; and a mechanical transport device disposed on the outlet side of the pneumatic transport device; and a cleaning nozzle that communicates with a cleaning pipe that communicates with a suction blower of the air transport device via the receiver tank.