Grading separator for powder particles

Abstract

The utility model relates to a grading separator for powder particles, which is used for separating the powder particles with different particle sizes, comprises an equipment frame body and a separator barrel body arranged on the equipment frame body, and is characterized in that the separator barrel body is provided with a straight-through charging barrel and a conical barrel which are vertically through; the circumferential direction of the straight-through charging barrel is connected with a section of rotary-cut flow guide cover with a feeding port, and the rotary-cut flow guide cover and the straight-through charging barrel are communicated into a whole in the rotary-cut direction; the middle of an upper cover of the straight-through charging barrel is communicated with a fine powder bin which is arranged above the upper cover and provided with a fine powder outlet, a grading wheel and an anti-backflow conical cover are arranged in the straight-through charging barrel, and a pair of oppositely-arranged breather pipes which are communicated to the interior of the conical barrel are horizontally and tangentially connected to the lower portion of the conical barrel. And the two ventilation pipes are respectively communicated with an external air source through valves. According to the utility model, through the segmented design of the separator cylinder body and the mutual cooperation of the rotary-cut flow guide cover, the grading wheel, the fine powder bin and the breather pipe, an ideal separation effect is achieved, and the quality of finished powder is improved.

Description

Technical Field

[0001] This utility model relates to a classifier for powder particles, belonging to the technical field of powder coating production equipment structure. Background Technology

[0002] In the powder coating production process, uneven particle size of materials processed by grinding mills and large particle size range can lead to poor performance of finished powder, high loss and high cost. Utility Model Content

[0003] The present invention aims to provide a classifier for powder particles.

[0004] A powder particle classifier for separating powder particles of different sizes includes a frame and a separator cylinder mounted on the frame. Its distinguishing feature is that...

[0005] The separator cylinder has a vertically connected straight feed cylinder and a conical cylinder. A section of rotary cutting guide with a feed inlet is circumferentially connected to the straight feed cylinder. The rotary cutting guide is integrally connected to the straight feed cylinder along the rotary cutting direction. The middle part of the upper cover of the straight feed cylinder is connected to a fine powder hopper located above the upper cover and having a fine powder outlet. The straight feed cylinder is equipped with a classifying wheel and an anti-backflow cone. A pair of opposing air pipes, both penetrating into the interior of the cone, are horizontally tangentially connected below the cone. The two air pipes are connected to an external air source through valves.

[0006] Furthermore, the anti-backflow cone is detachably installed inside the straight-through material cylinder. It has a straight section that is fixed to the inner wall of the straight-through material cylinder and a cone section with a circular guide channel in the middle. The straight section is used to detachably connect to the inner wall of the straight-through material cylinder, and the cone section is used to guide the screened coarse powder downward.

[0007] Furthermore, the grading wheel is a cylindrical sieve cylinder, which includes a tubular filter element and a first end seat and a second end seat located at the upper and lower ends of the tubular filter element; the tubular filter element includes a plurality of longitudinal wedge-shaped filter strips arranged circumferentially, and a plurality of filter slits arranged circumferentially and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filter slits has a radial transition from small to large along the filtration direction.

[0008] Furthermore, the grading wheel is driven by a motor located on top of the fine powder bin.

[0009] Furthermore, the equipment frame is also equipped with a lifting cylinder, the cylinder rod end of which is used to drive the upper cover.

[0010] Furthermore, the outer wall of the straight-through cylinder is provided with a locking hinge for tightly closing the upper cover with the straight-through cylinder.

[0011] This utility model discloses a powder particle separator. Through a segmented design of the separator cylinder, combined with the coordinated operation of a rotary cutting guide hood, a classifying wheel, a fine powder bin, and an air vent, it achieves an ideal separation effect. Material enters through the feed inlet, is driven downwards by the motor-driven classifying wheel, and then the lower air vent, through a control valve, adjusts the amount of ultrafine powder in the descending material, reducing the fine powder content of the finished product. An anti-backflow cone effectively prevents loss of qualified material. The particle size can be screened according to customer needs, improving material quality, increasing utilization, and reducing costs. Attached Figure Description

[0012] Figure 1 : Schematic diagram of the overall structure of the staged separator in Example 1;

[0013] Figure 2 : Figure 1 Another structural diagram from a different angle;

[0014] Figure 3 Schematic diagram of the separator cylinder structure;

[0015] Figure 4 Schematic diagram of the assembly relationship between the motor, fine powder bin, and classifier wheel;

[0016] Figure 5 Schematic diagram of the anti-backflow cone structure.

[0017] In the diagram, 1 is the equipment frame, 2 is the motor, 3 is the fine powder bin, 4 is the fine powder outlet, 5 is the classifying wheel, 6 is the top cover, 7 is the straight feed cylinder, 8 is the cone cylinder, 9 is the air pipe, 10 is the powder inlet, 11 is the rotary cutting guide hood, 12 is the lifting cylinder, 13 is the locking hinge, 14 is the anti-backflow cone hood, 14a is the straight section, and 14 is the cone section. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] Example 1

[0020] A powder particle classifier is configured at the discharge end of a grinding mill to separate powder particles of different sizes. The classifier includes a frame 1 and a separator cylinder mounted on the frame 1. The separator cylinder is composed of a vertically connected straight feed cylinder 7 and a conical cylinder 8. A vortex-cutting guide shroud 11 is circumferentially connected to the straight feed cylinder 7. The outer end of the vortex-cutting guide shroud 11 is a feed inlet 10. The side of the vortex-cutting guide shroud 11 that is in contact with the straight feed cylinder 7 is integrally connected to it in a spiral cutting manner. The function of the vortex-cutting guide shroud 11 is to create a spiral airflow channel, thereby forming a vortex-cutting pneumatic fluid containing powder particles inside the straight feed cylinder 7. The top of the straight-through material cylinder 7 is equipped with a top cover 6. The top cover 6 has a through hole in the middle, and a sleeve is sealed and installed at the through hole. The lower end of the sleeve is connected to the straight-through material cylinder 7, and the upper end is connected to the fine powder hopper 3 located above the top cover 6 to form a fine powder channel. The fine powder hopper 3 has a fine powder outlet 4 and is connected to an external fan and dust collector via the fine powder outlet 4. A motor 2 is installed above the fine powder hopper 3. The output shaft of the motor 2 passes through the top cover end of the fine powder hopper 3 and downwards through the fine powder hopper 3 and the sleeve into the interior of the straight-through material cylinder 7, where it is fixedly connected to the classifying wheel 5 located inside the straight-through material cylinder 7. The straight feed cylinder 7 has an anti-backflow cone shroud 14 in its inner middle section. The anti-backflow cone shroud 14 has a straight section 14a that is fixed to the inner wall of the straight feed cylinder 7 and a cone section 14b with a predetermined slope. The anti-backflow cone shroud 14 is detachably connected to the inner wall of the straight feed cylinder 7 through the straight section 14a. The cone section 14b has a circular guide channel in the middle and guides the screened coarse powder to the space below through the circular guide channel.

[0021] The grading wheel 5 is a cylindrical sieve cylinder structure, specifically including a tubular filter element and a first end seat and a second end seat located at the upper and lower ends of the tubular filter element; the tubular filter element includes several longitudinal wedge-shaped filter strips arranged circumferentially, and several filter slits arranged circumferentially and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filter slits has a radial transition from small to large along the filtration direction.

[0022] The bottom of the cone 8 is a discharge end for connection with the discharge device. A pair of opposing vent pipes 9 are horizontally arranged below the cone 8, each tangentially connected to the outer periphery of the cone 8 and extending into the interior of the cone. The two vent pipes 9 are connected to an external air source. Pressurized airflow enters the interior of the cone 8 through the two vent pipes 9, forming an upward spiral airflow at the bottom of the cone 8. This intercepts some of the falling fine powder, which is then pushed upwards by the airflow until it is pushed to the fine powder hopper 3 for separation.

[0023] The equipment frame 1 is also equipped with a lifting cylinder 12. The cylinder rod end of the lifting cylinder 12 is fixedly connected to the upper cover 6 through a connector. When it is necessary to open the upper cover 6, the upper cover 6 can be pushed open by controlling the lifting cylinder 12. The outer wall of the straight material cylinder 7 is equipped with a locking hinge 13, which can seal and lock the upper cover 6 to the top of the straight material cylinder 7.

[0024] The working process of the feeder in this embodiment is as follows:

[0025] First, start all the fans and motors to put the equipment into operation. The material is first fed into the straight-through material cylinder at the top of the separator cylinder through the feed inlet. With the airflow direction and the high-speed rotation of the classifying wheel, the material forms a swirling airflow in the straight-through material cylinder. At the same time, the negative pressure created by the fan outside the fine powder bin above the separator cylinder also generates an upward airflow, which causes the smaller fine particles in the material to pass through the classifying wheel and be carried upward into the fine powder bin, and finally separated and discharged through the fine powder outlet. The larger coarse particles are blocked by the classifying wheel and fall downward, passing through the anti-backflow cone and entering the cone inside the cylinder. The fine particles that are still present in the material inside the cone are pushed upward again by the upward swirling airflow formed by the bottom air pipe as they descend, and pass through the anti-backflow cone into the fine powder bin above for separation and discharge.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A classifier for powder particles, used to separate powder particles of different sizes, comprising a frame and a separator cylinder disposed on the frame, characterized in that, The separator cylinder has a vertically connected straight feed cylinder and a conical cylinder. A section of rotary cutting guide with a feed inlet is circumferentially connected to the straight feed cylinder. The rotary cutting guide is integrally connected to the straight feed cylinder along the rotary cutting direction. The middle part of the upper cover of the straight feed cylinder is connected to a fine powder hopper located above the upper cover and having a fine powder outlet. The straight feed cylinder is equipped with a classifying wheel and an anti-backflow cone. A pair of opposing air pipes, both penetrating into the interior of the cone, are horizontally tangentially connected below the cone. The two air pipes are respectively connected to an external air source through valves.

2. A classifier for powder particles as described in claim 1, characterized in that, The anti-backflow cone is detachably installed inside the straight-through material cylinder. It has a straight section that is fixed to the inner wall of the straight-through material cylinder and a cone section with a circular guide channel in the middle. The straight section is used to detachably connect to the inner wall of the straight-through material cylinder, and the cone section is used to guide the screened coarse powder downward.

3. A classifier for powder particles as described in claim 1, characterized in that, The grading wheel is a cylindrical sieve cylinder, which includes a tubular filter element and a first end seat and a second end seat located at the upper and lower ends of the tubular filter element; the tubular filter element includes a plurality of longitudinal wedge-shaped filter strips arranged circumferentially, and a plurality of filter slits arranged circumferentially and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filter slits changes radially from small to large along the filtration direction.

4. A classifier for powder particles as described in claim 1, characterized in that, The classifying wheel is driven by a motor located on top of the fine powder bin.

5. A classifier for powder particles as described in claim 1, characterized in that, The equipment frame is also equipped with a lifting cylinder, and the cylinder rod end of the lifting cylinder is used to drive the upper cover.

6. A classifier for powder particles as described in claim 1, characterized in that, The outer wall of the straight-through cylinder is provided with a locking hinge for tightly closing the top cover with the straight-through cylinder.

Images