JP2501592Y2 - Powder transport equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for transporting, for example, iron ore, sinter, metal powder, etc. to a required place.

(Prior Art) As a sealed powder transportation method, a so-called air transportation device utilizing compressed air pressure, a flight conveyor,
There is a mechanical transport device that uses a tubular conveyor, a screw conveyor, or the like.

(Problems to be solved by the invention) By the way, in the conventional pneumatic transportation device, stable transportation cannot be performed unless a flow velocity of 10 to 20 m / min is maintained, and therefore, powders having high abrasion properties such as iron ore are not produced. When pumped, wear and damage in the transport pipe are significant, and stable operation over a long period cannot be achieved. Further, if the distribution of the fineness is uneven, a clogging phenomenon is likely to occur, and a crushing process for adjusting the particle sizes in advance is required, resulting in a high cost. Further, in order to secure stable pumping, a high-level control device must be provided, and various adjusting devices such as adjusting the cut-out amount by pressure control are required, which increases the equipment cost per system.

On the other hand, the mechanical transporting device forcibly transports the transported object by the large-diameter scraping plate B attached to the chain A as seen in, for example, the tubular conveyor shown in FIG.
There was a problem that the frictional wear with the inner wall of the pipe and the transported material was large, and the structure was large, and a large installation space was required.

The present invention has been made to solve such a problem, and uses a pneumatic transportation method, in particular, an improved mechanical transportation method using a tubular conveyor, to achieve stable powder transportation at low speed. An object of the present invention is to provide a powder transportation device which can reduce frictional wear with an inner wall of a pipe or a transported material as much as possible.

(Means for Solving the Problems) In order to achieve the above object, a powder transportation apparatus according to the present invention is a powder air transportation tube in which a blow tank is connected to a base end and a delivery tube is connected to the other end. And a return pipe which is guided from the powder air transport pipe of the delivery pipe connecting portion to the base end of the powder air transport pipe, and communicates both pipe ends through a turning device. The moving transport strip with small pieces attached at intervals is stretched endlessly.

(Operation) The present invention relates to a powder air transportation pipe having a blow tank connected to the base end and a delivery pipe connected to the other end, and a powder air transportation pipe from the powder air transportation pipe at the delivery pipe connecting portion. A configuration is provided in which a return pipe that is guided to the base end portion is provided, and both ends of these pipes are communicated via a turning device, and a movable conveyance strip that is provided with small pieces that are installed at regular intervals in both pipes is endlessly stretched. Therefore, the powder delivered from the blow tank is transported by the small pieces attached at regular intervals to the transport strip that is pressure-fed in the powder air-transport pipe and at the same time moves in the pressure-feed direction at the center of the powder-air transport pipe. Can help.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a powder air transportation pipe, a blow tank 2 is connected to the base end portion thereof, and a delivery pipe 3 is connected to the other end portion thereof. Reference numeral 4 denotes a return pipe parallel to the powder air transport pipe 1, and both pipes 1 and 4 are communicated with each other through turning devices 5 and 6 by the turning devices 5 and 6 and driving means. It is configured such that a moving conveyance strip described later moves in the tubes 1 and 4.

That is, a drive sprocket 7 is installed in the one turning device 5, and a return sprocket 8 is installed in the other turning device 6, so that the movable conveying strip 9 is endlessly stretched between the two sprockets 7, 8. It is hung.
By the way, the moving and conveying strip 9 is made of a flexible strip such as a chain or a wire, and as shown in FIGS. 2 (a) and 2 (b), a small piece 10 for imparting a conveying force to the powder over its entire length.
Are attached at regular intervals. Further, the moving and transporting strip 9 always maintains a predetermined tension, and the powder air transport pipe 1
Also, it moves vertically through the intermediate portion of the return pipe 4 and does not contact the inner wall of the pipe.

Reference numeral 14 denotes a compressed air cutoff mechanism provided at two locations C and D or at two locations E and F shown in FIG. 1, and has the same diameter as the small piece 10 in the powder air transport pipe 1 or the return pipe 4. The sealing pipe 15 having the inner diameter of is arranged on the same line as the transfer line of the moving transfer strip 9.

Reference numeral 11 in the drawing is a pressure equalizing tank, and piping 12 for supplying pressurized air, pressurized gas, etc. to the blow tank 2 and the blow tank 2.
Are arranged. Further, 13 is a hopper for receiving powder, and 16 is a booster pipe.

By the way, the embodiment shown in FIG. 1 shows the basic structure of the present invention. For example, in the case of implementing it as a device for supplying required powder to a plurality of locations, a blower which is a pressurizing device is used. The powder air transportation pipe 1 and the return pipe 4 may be connected to the tank 2 in a plurality of branches, and the delivery pipe 3 of each device may be connected to each place. Although not shown in the figure, the powder air transport pipe 1 and the return pipe 4 can be embodied as any curved or bent structure. The pressure-feed medium is not limited to air.

(Effect of the Invention) As described above, the present invention is provided with the powder air transportation pipe and the return pipe, and both ends of the pipe are connected by the turning device, and the small pieces are attached at a constant interval between the sprockets in the turning device. The moving and transporting member is stretched, and in addition to the pneumatic feeding, the mechanical action of a small piece that moves in the center of the pipe works, so the density (concentration) of powder, transport speed, and particle size The transport that overcomes the previously impossible conditions is achieved regardless of the variation of Also, since it can be transported at an ultra-low speed, there is little danger of wear damage and the amount of compressed air (pressure) may be small. Furthermore, even if there are many transportation destinations, the amount of transportation can be controlled by the device itself, which is a great effect.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention in a partial cross section, FIGS. 2 (a) and 2 (b) are partial views illustrating moving and conveying conditions, and FIG. FIG. 4 is a sectional view showing an example, and FIG. 4 is a partial view showing a conventional tubular conveyor type apparatus. 1 is a powder air transportation pipe, 2 is a blow tank, 3 is a delivery pipe,
Reference numeral 4 is a return pipe, 5 and 6 are turning devices, 7 and 8 are sprockets, and 9 is a moving and conveying strip.

Claims (1)

(57) [Scope of utility model registration request] 1. A powder air transport pipe having a blow tank connected to a base end and a delivery pipe connected to the other end, and a powder air transport pipe from the delivery pipe connecting portion to a base end of the powder air transport pipe. And a return pipe to be guided to the end of the pipe, and both ends of these pipes are communicated with each other through a turning device, and a movable conveyance strip having small pieces attached at regular intervals in both pipes is endlessly stretched. Powder transportation equipment.