JPH02264019A - Fiber-conveying duct for dusting - Google Patents

Abstract

PURPOSE:To obtain the subject duct which reduces the dust ratio of the fiber feedstock to be sent the next stage and diminish the dusting operation by providing the duct with a swirling duct having spiral blades on the inner periphery and the separation duct in which grids are stretched. CONSTITUTION:The subject duct is provided with the swirling duct 2 which allows the fiber feedstock which is conveyed pneumatically to swirl and the following separation duct 3 which can separate dust so that the duct 2 is equipped with swirling blades 5 in the inner periphery and the duct 3 has grids 6 extended to pass through the separated dust, but stop the fiber feedstock.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is designed to scrape open bales of raw cotton and remove high-density debris (including foreign matter) such as dust such as sand or leaf dregs in the raw fibers that are transferred together with the conveying air. ) for removing dust during transport.

[Conventional technology]

The scraped raw material fibers (hereinafter simply referred to as raw cotton) are normally fed into a cotton mixing machine, where they are opened by a beater, hit against a grid, and the dust is sucked through the grid by a suction air current. A method is being adopted to remove it.

[Problem that the invention seeks to solve]

Dust removal using the beater is usually repeated several times. However, scraping with a beater has the disadvantage of damaging the fibers, so it is preferable to reduce the number of scraping operations as much as possible.

In view of this, an object of the present invention is to remove dust during the transportation of raw cotton, thereby reducing the dust removal load on the above-mentioned mixing and batting machine.

[Means to solve the problem]

To achieve the above object, the dust removal cotton feeding duct of the present invention includes a swirling duct that imparts a swirling flow to the raw material fibers transferred together with the conveying airflow, and a separation duct that is connected to this duct and separates and discharges the contained dirt. The swirling duct is equipped with a spiral blade on its inner periphery, and the separation duct is provided with a grid that allows the passage of dust due to the centrifugal force caused by the swirling flow, but prevents the passage of raw material fibers.

[For production]

The feed raw cotton is given a swirl in the swirl duct. As a result, dust particles having a large specific gravity are urged toward the outer periphery and are discharged outward through the gaps between the grids in the next separation duct.

〔Example〕

The figure shows an embodiment of the present invention. A cotton feeding duct 1 for removing dust is composed of a revolving duct 2 connected to a supply duct lO connected to a bale opening mechanism, etc., and a separation duct 3 connected to the revolving duct 2. .

The swirling duct 2 has a plurality of spiral blades 5 attached to the inner periphery of the cylinder 4 to give a swirling flow to the raw cotton.

The separation duct 3 has a large number of bar-shaped grids 6 having approximately the same inner diameter as the cylindrical body 4, preferably parallel to the flow direction of the raw cotton, to allow dust to pass therethrough, but to prevent the raw cotton from passing through. A dust collection chamber 7 is provided surrounding the dust collection chamber 7, and a suction duct 8 connected to an appropriate suction means (not shown) is connected to the dust collection chamber 7. 9 is a grid, 6 is a retaining ring, and 11 is a discharge duct.

In the above configuration, the raw cotton fed from the supply duct 10 together with the carrier airflow is turned into a swirling flow by the spiral blades 6 in the swirling duct 2 and is fed into the separation duct 3. At this time, dust particles, leaves, and other high-density debris that are sent together with the raw cotton or attached to the raw cotton are urged toward the outer circumference by centrifugal force, and are discharged from the gaps between the grids 6 into the dust collection chamber 7. be done. As a result, the dust content ratio of the raw cotton is reduced, and the raw cotton is sent to the next process via the discharge duct (11).

Incidentally, the dust transferred to the dust collection chamber 7 is discharged to the outside by intermittently operating the suction means.

〔Effect of the invention〕

According to the present invention, a swirling action is applied to the raw cotton sent out along with the conveying air flow, and the dust, which has a higher specific gravity than the raw cotton, is urged toward the outer circumference by centrifugal force, and is discharged from the gap between the grids in the separation duct. The dust content ratio of raw cotton supplied to the next process is reduced, and the dust removal work can be reduced.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the entire structure, FIG. It is a longitudinal cross-sectional view of the separation duct along the line ■-■. 1 is a dust removal cotton feeding duct, 2 is a swirling duct, 3 is a separation duct, 6 is a spiral blade, and 6 is a grid.

Claims (1)

[Claims] It consists of a swirling duct that imparts a swirling flow to the raw material fibers that are transferred with the conveying airflow, and a separation duct that is connected to this duct and separates and discharges the contained dust. A cotton feeding duct for dust removal, characterized in that it is provided with a grid that allows the passage of dust due to the centrifugal force based on the swirling flow, but blocks the passage of raw fibers.