JPS6099332A - Drum in fluidization circulation apparatus - Google Patents

Abstract

PURPOSE:To generate circulating flow in a desirably regulated manner by providing a spiral projected edge turning in the opposite direction of a spiral partition wal provided between an internal cylinder and an external cylinder, to the internal peripheral surface fitted concentrically into the external cylinder, and providing also a circulation port to an end of the internal cylinder. CONSTITUTION:When a material is fed to an internal cylinder from a feeding chute 9 and a motor 15 is driven, the material is moved in the internal cylinder 2 in one direction from right to left by the feeding effect of a spiral projected edge 5. The material is introduced into a spiral chamber 4 from a circulation port 6 and moves from left to right by the effect of a spiral partition wall 3 along the internal peripheral surface at the bottom of the external cylinder 1. In this eay, the material is circulated in the drum through the internal cylinder 2 and the external cylinder 1 alternately and in opposite direction to each other and in one direction in each cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a drum in which a spiral protrusion is formed on the inner circumferential surface of the drum, which is rotated while a rod-like material housed in the drum is circulated in a fluid manner. It relates to the drum of a fluid circulation device such as a sanding device or a drying device.

Prior Art A fluid circulation system in which a spiral protrusion is formed in a rotating drum is used, for example, in a mixing drum of a concrete mixer truck, and in the prior application of the present patent applicant, Japanese Patent Publication No. 56-10142. (Tokuma No. 53-25731)
There is.

Problems to be Solved by the Invention The former method in the above prior art involves inclining the axis of rotation of a drum having spiral protrusions, thereby forming an upward flow in which the material rises along the bottom surface of the drum; The material released from forced feeding by the spiral near the exit of the raised drum flows downward along the upper part of the above-mentioned upward flow (
This system is designed to generate a circulating flow for the particulate matter in the drum, and while it has the advantage that the length of the drum can be shortened, it also has the advantage that the length of the drum can be shortened. Because of this, the boundary between the two flows gets mixed up, causing particles to form in the granular material due to differences in particle size and specific gravity, making it impossible to uniformly generate a circulating flow at the intended speed. On the other hand, in the latter method, two drums are placed parallel to each other on a flat surface and vertically with their sleeves S crossing each other in an X shape, and the material raised inside one of the drums is sent through a chute. By supplying the liquid to the lower end of the other inclined drum through the drum, the liquid is alternately circulated in one direction through the two drums.

The latter allows the material to flow in one direction in an orderly manner, making it possible to process with uniform precision, but since two drums are placed side by side, it occupies a large amount of floor space and has the disadvantage of being expensive to manufacture. It would be desirable to develop a drum for a fluid circulator that would produce an orderly circulating flow of material within the base drum.

Means for Solving the Problems Therefore, the present invention provides an inner periphery that is fitted concentrically inside an outer cylinder at appropriate intervals, and that edges are formed on both sides of the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. A helical partition wall is fixed thereto to form a continuous helical chamber along the inner surface of the outer cylinder, and a helical protrusion is provided on the inner circumferential surface of the inner cylinder in a direction opposite to that of the helical partition wall, and one end of the inner cylinder A drum for a fluid circulation device is provided, in which a circulation port communicating with the spiral chamber is provided, and another circulation port communicating with the other end of the inner cylinder is provided at the other end of the spiral chamber.

Operation In the drum of the present invention constructed as described above, the material supplied into the drum passes through the spiral chamber on the inner surface of the outer cylinder in one direction as the drum rotates, flows into the inner cylinder at its tip, and then flows into the inner cylinder. Due to the feeding action of the spiral protrusions, the fluid flows one-way in the opposite direction to the above and flows into the base end of the spiral chamber again, creating an orderly circulation flow with the flow direction reversed within one drum. , which eliminates the above-mentioned conventional drawbacks.

Example The drawings illustrate embodiments of the invention.

In the figure, (1) is an outer cylinder that is rotatably hung horizontally with its cylindrical axis horizontal, and (2) is an outer cylinder that has a common axis with the outer cylinder (fl) and is fitted concentrically with an appropriate interval. inner cylinder, (3
) is a helical partition whose both side edges are fixed to the inner circumferential surface of the outer cylinder fil and the outer circumferential surface of the inner cylinder (2), and (4) is this helical partition wall (3).
), a spiral chamber is continuously formed along the inner peripheral surface of the outer cylinder between the outer cylinder (1) and the inner cylinder (2), and (5) is the inner cylinder (2).
A helical protrusion (6) is provided on the inner circumferential surface of the helical partition wall (3) and has an inclination in a direction opposite to that of the helical partition wall (3).
A circulation port (7) opens at one end (on the left in the figure) of the circumferential surface of the inward facing (2) so as to communicate with the spiral chamber (4).
181C81 is an opening formed in the center of both end faces of the outer cylinder (1), A material supply chute to be inserted into and out of the opening (8) on the right hand side, O
I is a material discharge port provided at the other end (left side in the figure) of the outer cylinder (1), 01) is a lid that opens and closes the discharge port (11), 02 is a discharge/neat inserted below the discharge port aI, and C13 is a A trochanter rotatably supports the front and rear of the drum consisting of an inner and outer double (1 (1) and (2)) from the bottom surface, 041 is a Cheno foil fixed to the outer periphery of the outer cylinder il+, and α is a trochanter between it and the Cheno foil (141 A motor that can be rotated in forward and reverse directions is driven by passing the chain over the drum.

This device configured as described above has a supply chute (9
When material is supplied from 1 and driven by the motor (!9), a unidirectional flow from right to left in the figure is generated in the material due to the feeding action of the spiral protrusion (5) in the inner cylinder (2). It flows into the spiral chamber (4) from the circulation port (6) at the left end, and by the feeding action of the spiral partition wall (3), a flow is generated from left to right along the inner peripheral surface of the bottom of the outer cylinder (11). As shown by the middle arrow, the inner cylinder (2) and the outer cylinder 10 are circulated in the drum alternately and one-way in opposite directions.

In putting the present invention into practice, it goes without saying that the pitch, etc. of the spirals formed in the outer cylinder (1) and the inner cylinder (2), respectively, may be changed as appropriate depending on the material to be processed and the capacity of the equipment. In accordance with the purpose of the present invention, the present invention is not limited to the illustrated embodiment. Further, the positions of the circulation ports +61 to +71 and the structure for loading and unloading materials into the drum are also the same.

The drum can also be used as a drying device by blowing air from one end and exhausting air from the other end.

Effects of the Invention The drum of the present invention, constructed as described above and used as described above, allows materials to pass through in one direction in opposite directions within the double inner and outer tubes each having spirals in opposite directions. Since the drums are alternately circulated while doing so, the circulation is more orderly than in the conventional slanted single-cylindrical drum, and a uniform finish can be obtained.

In addition, the floor area required for installation can be reduced by more than half compared to conventional crossed two-cylinder drums, making it possible to use land more effectively, and the structure is simple and can be manufactured at low cost.
A major advantage is that the material can be circulated through the flow without tilting the axis of the drum.

[Brief explanation of drawings]

The drawing is a side view, partially cut away, schematically showing an embodiment of the invention. 1. Outer cylinder, 2. Inner cylinder, 3. Spiral partition, 4. Spiral chamber, 5. Spiral protrusion, 6. 7. Circulation port, 8.
Opening, 9... Supply chute, 10... Discharge port, 11...
・Lid, 12... Discharge chute, 13... Trochanter, 14...
Cheno foil, 15...motor, F...mount. l... outside? ,'A2... Inner cylinder 3... Spiral partition wall 4... Spiral chamber 5... Millet bar protrusion 6.7... Circulation port

Claims (1)

[Claims] The inner cylinder (2) is fitted concentrically inside the outer cylinder (1) at appropriate intervals, and both side edges are fixed to the inner peripheral surface of the outer cylinder (11) and the outer peripheral surface of the inner cylinder (2). A spiral partition wall (3) is provided to form a continuous spiral chamber (4) along the inner circumferential surface of the outer cylinder, and a spiral chamber (4) is provided on the inner circumferential surface of the inner cylinder 12) in a direction opposite to the upper helical partition wall (3). In addition to providing a spiral protrusion (5), this inner cylinder (
2) A circulation port (6) communicating with the spiral chamber 14)K is connected to one end of the spiral chamber 14).
), and the other end of the spiral chamber (41 is provided with the other circulation port (7) communicating with the other end of the inner cylinder (2).