CN206392274U

CN206392274U - A kind of cyclone with ladder shaft-like overflow pipe

Info

Publication number: CN206392274U
Application number: CN201621434073.2U
Authority: CN
Inventors: 张悦刊; 刘培坤; 杨兴华; 姜兰越
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2016-12-26
Filing date: 2016-12-26
Publication date: 2017-08-11
Anticipated expiration: 2026-12-26

Abstract

The utility model discloses a kind of cyclone with ladder shaft-like overflow pipe, including column body segment and overflow pipe, the top of overflow pipe is extend out on the outside of column body segment, the bottom of overflow pipe is stretched in column body segment, the outline of overflow pipe is in ladder shaft-like, and the external diameter of the overflow pipe is sequentially reduced from top to bottom, the internal diameter of overflow pipe keeps constant in the axial direction.The utility model is simple in construction, can both improve effectiveness of classification, can also reduce short-circuit flow while separative efficiency is not reduced.

Description

Swirler with stepped shaft-shaped overflow pipe

Technical Field

The utility model belongs to the technical field of whirl solid-liquid separation or solid-solid grading, especially, relate to a swirler with step shaft form overflow pipe.

Background

At present, the main equipment for solid-liquid separation or solid-solid classification is a cyclone. The mixed slurry to be separated is fed into the cyclone from the feeding port in tangent direction under certain pressure, and owing to the size difference between coarse grains and fine grains, the coarse grains are subjected to centrifugal force, centripetal buoyancy, fluid drag force and other force, so that the fine grains smaller than the separated size are gathered to the center and exhausted via the overflow port, and the coarse grains larger than the separated size are made to move to the wall and exhausted via the bottom flow port to reach the aim of separating and grading.

However, in the above-mentioned prior art cyclone, due to the existence of the solid boundary, a part of the fluid forms the boundary layer, because the tangential velocity in the boundary layer is very small, so that the particles contained in the part of the fluid flow along the boundary layer of the cyclone top cover, bypasses the outer wall of the overflow pipe, moves downwards, and then directly enters the overflow pipe without effective separation to form the short-circuit flow. The presence of short-circuit currents seriously reduces the cyclone classification accuracy and efficiency.

It will thus be seen that the prior art is susceptible to further improvements and enhancements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an avoid the weak point that above-mentioned prior art exists, provide a swirler with step shaft form overflow pipe, this swirler can realize or reduce the short circuit and flow.

The utility model discloses the technical scheme who adopts does:

the utility model provides a swirler with step shaft form overflow pipe, includes column body section and overflow pipe, and the upper portion of overflow pipe stretches out to the column body section outside, and the lower part of overflow pipe stretches into to the column body section in, the outline of overflow pipe is the step shaft form, just the external diameter top-down of overflow pipe reduces in proper order, and the internal diameter of overflow pipe remains unchanged in the axial.

The overflow tube is coaxially arranged with the cylinder section.

The bottom of the overflow pipe is located in the lower half of the interior of the column section.

The upper portion of cylinder section has seted up tangential feed inlet, the axial of feed inlet and the axial mutually perpendicular of overflow pipe.

The cyclone further comprises a cone section, the upper part of the cone section is connected with the cylinder section, the interior of the cone section and the interior of the cylinder section are jointly matched to form a rotational flow cavity for materials to rotate, and the lower part of the cone section is provided with a bottom flow port.

The cone segments are arranged coaxially with the cylinder segments.

The height of the cylinder segment is greater than the height of the cone segment.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. the utility model discloses an at the inside overflow pipe structure that sets up the step shaft form of swirler column body section, and adjust the wall thickness of overflow pipe, the overflow pipe part wall thickness relative with the feed inlet position promptly is thicker, can reduce or restrict the short circuit and flow, improves the hierarchical precision of swirler. In addition, the overflow pipe stretches into the partly darker in the column body section, can avoid or reduce the raw materials directly to get into the probability of overflow pipe through the separation, simultaneously, the overflow pipe wall in column body section main separation area is thinner, can not influence the separation space in column body section main separation area, so both do benefit to and improve hierarchical precision, can reduce the short-circuit flow when not reducing separation efficiency again, improved hierarchical precision and classification efficiency.

2. The utility model discloses the height of center pillar body section is higher, can effectively increase the separation region, and extension separation time improves classification efficiency.

3. The utility model discloses simple structure, the installation is maintained conveniently, and the cost of manufacture is lower.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein,

1. cylinder section 2, cone section 3, underflow opening 4, feed inlet 5 and overflow pipe

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments, but the present invention is not limited to these embodiments.

As shown in fig. 1, a cyclone with a stepped shaft-like overflow tube comprises a cylindrical section 1, a conical section 2 and an overflow tube 5. The cylinder section 1, the cone section 2 and the overflow pipe 5 are coaxially arranged. To increase the separation area, the height of the cylinder section 1 is designed to be higher. The upper part of the cylinder section 1 is provided with a tangential feed inlet 4, and the axial direction of the feed inlet 4 is vertical to the axial direction of the overflow pipe 5. The upper portion of the cone section 2 is connected with the cylinder section 1, the interior of the cone section 2 and the interior of the cylinder section 1 are matched together to form a rotational flow cavity for materials to rotate, and the lower portion of the cone section 2 is provided with a bottom flow port 3.

The upper part of the overflow pipe 5 extends out of the column section 1, and the lower part of the overflow pipe 5 extends into the lower half part of the column section 1. The outer contour of the overflow pipe 5 is in a stepped shaft shape, the outer diameter of the overflow pipe 5 is sequentially reduced from top to bottom, and the inner diameter of the overflow pipe 5 is kept unchanged in the axial direction. That is, the wall thickness of the overflow pipe 5 is gradually reduced from top to bottom, the portion of the overflow pipe 5 opposite to the feed port 4 has a thicker wall thickness, and the lower portion of the overflow pipe 5 has a thinner wall thickness. The separated fine particles enter from the bottom of the overflow pipe 5 and flow out from the top of the overflow pipe 5, the lower half of the column section 1 as the main separation area increases the separation area due to the higher height of the column section 1 and the thinner wall thickness of the lower part of the overflow pipe 5, the separation time is prolonged, and the separation efficiency is improved.

The working process of separating materials by using the cyclone is roughly as follows: the material to be separated enters the cylinder section 1 from the feed inlet 4 tangentially at a certain speed under a certain pressure, and the material does high-speed centrifugal rotation motion in a rotational flow cavity formed by the cylinder section 1 and the cone section 2. The fine particles smaller than the separated particle size are subjected to a small centrifugal force, they are gathered toward the center and discharged into the overflow pipe 5. Coarse particles larger than the separation size are subjected to a large centrifugal force, move toward the inner walls of the cylinder section 1 and the cone section 2, and are discharged through the underflow port 3. Because the stepped shaft-shaped overflow pipe 5 is arranged in the column body section 1, the depth of the overflow pipe 5 inserted into the column body section 1 is deeper, and the wall thickness of the part of the overflow pipe 5 opposite to the feed port 4 is thicker, the probability of short-circuit current entering the overflow pipe 5 can be effectively limited. Meanwhile, the wall thickness of the part of the overflow pipe 5 opposite to the main separation area of the cylinder section 1 is thinner, so that the separation area is effectively increased, the retention time of particles in the separation area is prolonged, and the separation of the particles is facilitated.

The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a swirler with step shaft form overflow pipe, includes column body section and overflow pipe, and the upper portion of overflow pipe stretches out to the column body section outside, and the lower part of overflow pipe stretches into to the column body section in, its characterized in that, the outline of overflow pipe is the step shaft form, just the external diameter top-down of overflow pipe reduces in proper order, and the internal diameter of overflow pipe remains unchanged in the axial.

2. The cyclone of claim 1, wherein the overflow tube is arranged coaxially with the cylindrical section.

3. The cyclone of claim 1, wherein the bottom of the overflow pipe is located at the lower half inside the column section.

4. The cyclone with the stepped shaft-shaped overflow pipe of any one of claims 1 to 3, wherein the upper part of the cylinder section is provided with a tangential feed inlet, and the axial direction of the feed inlet is perpendicular to the axial direction of the overflow pipe.

5. The cyclone of any one of claims 1 to 3, wherein the cyclone further comprises a cone section, the upper part of the cone section is connected with the column section, the inner part of the cone section and the inner part of the column section cooperate to form a cyclone chamber for the material to rotate, and the lower part of the cone section is provided with a bottom flow port.

6. The cyclone according to claim 5, wherein the cone segments are arranged coaxially with the cylinder segments.

7. The cyclone with a stepped shaft overflow tube of claim 5, wherein the height of the cylinder section is greater than the height of the cone section.