JPH0116523Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to collect powder, etc. generated when a part of the pellet-shaped resin is crushed when vinyl chloride or other pellet-shaped resin is conveyed by air. The present invention relates to a separation device for separating from.

(Prior art) When vinyl chloride or other pellet-shaped resin is conveyed by air, a portion of the pellet is crushed into powder by impact or contact with the conveyance path.
This is conveyed mixed with the pellets, or after being attached to the conveyance path, it is peeled off into strings and mixed with the pellets and conveyed.

If pellets containing such powder or string-like materials are used as a raw material, the product will be uneven and the quality of the product will be poor.

For this reason, conventionally, a sieving device or an air separator equipped with a centrifugal fan is used.

(Problem that the invention aims to solve) However, in the sieving device, the string-like material tends to clog, which requires frequent cleaning, and the latter has the disadvantage that reliable separation cannot be performed. .

(Means for Solving the Problems) The purpose of the present invention is to obtain a device free from such inconveniences, and in a device for pneumatically conveying vinyl chloride or other pellet-like resin through a transfer path. A tangential flow type cyclone is provided in the transfer path,
A spiral first guide vane that slopes downward toward the center of the cyclone body and a second guide vane located above the spiral guide vane that faces in the vertical direction are provided on the conveying path of the resin pellets formed in the cyclone. It is made up of

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.
In the drawing, 1 indicates a transfer path for pneumatically conveying vinyl chloride or other pellet-like resin, and 2 indicates a tangential flow type cyclone connected to the transfer path 1. A conveyance passage 3 for conveying the pellet-shaped resin is formed, and the passage 3 includes a spiral first guide vane (4) descending toward the center of the cyclone 2 and a first spiral guide vane (4) extending vertically above the guide vane (4). A second guide vane 5 is provided, an inlet 6 is provided facing the passage 3 of the cyclone 2 in a tangential direction thereof, and an outlet is provided at the upper part of the cyclone 2 for taking out the separated powder or string-like material. An outlet 7 was provided, and at the bottom of the cyclone 2, an outlet 8 for taking out pellet-shaped resin was provided. Note that the second guide vane 5 has only its lower part 5a tilted to ensure the transfer of the powdered resin from the first guide vane 4 to the second guide vane 5. Reference numeral 9 indicates a support supporting the second guide vane.

(effect) Next, the operation of the present invention will be explained.

For example, at a flow rate of about 25 m/sec, resin pellets with a diameter of about 4 mm and a thickness of about 3 mm are blown into the cyclone 2 in a state where they are mixed with powder or fine particles generated during conveyance.

At this time, these particles rise within the cyclone following the first guide vane 4, but as they rise, the heavier pellet-shaped resin has a decrease in air volume due to friction with the first guide vane 4. It then stalls, moves to the center side where the flow velocity is slower according to the inclination of the first guide vane 4, falls from the gap between the cylinder 2a and the first guide vane 4 while drawing an arc, and then moves to the second guide vane along with powder, etc. The pellet-like resin that has arrived at the guide vane 5 loses its swirling force when it comes into contact with the guide vane 5, so that it is reliably separated from the powder, etc., and falls in the same manner as described above and is taken out from the outlet 8 below.

However, light powder or string-like powder rises along the first guide vane 4 and passes through the second guide vane 4.
Together with the air flow guided upward by the guide vanes 5, the air is directed towards the upper outlet 6 and is extracted therefrom.

(Effect of the invention) As described above, according to the invention, a tangential flow type cyclone is provided in the transfer path, and a spiral-shaped resin descending toward the center of the cyclone is provided in the transport path of the pellet-shaped resin formed in the cyclone. Since the first guide vane and the second guide vane in the vertical direction located above the first guide vane are exposed, it is possible to ensure that relatively light substances such as powder or strings generated in the transfer path are removed from the pellet-shaped resin. It has the effect of being able to separate the two.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of one example of implementing the present invention;
The figure is a sectional view taken along the - line. 1... Transfer path, 2... Cyclone, 3... Transfer path, 4... First guide vane, 5... Second guide vane.

Claims (1)

[Scope of utility model registration request] When pneumatically conveying vinyl chloride or other pellet-shaped resin through a transfer path, a tangential flow type cyclone is installed in the transfer path, and a cyclone is placed in the center of the cyclone body in the pellet-shaped resin conveyance path formed by the cyclone. The spiral first slope slopes downward toward the
A separation device comprising a guide vane and a second guide vane positioned above the guide vane and facing in the vertical direction.