Air inlet structure of grader

Abstract

The utility model relates to an air inlet structure of a grader, which comprises a barrel of the grader and volutes respectively arranged outside the lower part of the barrel, a feeding pipe extending into the barrel is arranged outside the barrel, a cone guide body is arranged on the outer side of the output section of the feeding pipe, an air outlet channel is arranged between the cone guide body and the feeding pipe, and the air outlet channel is communicated with the feeding pipe. And rotating air flow formed in the volute moves upwards through the air outlet and the air outlet channel in the inner side of the volute. The device is simple in structure, reasonable in design and convenient to use, rotating air flow is fed into the barrel through the volute, the rotating air flow is conveyed upwards through the air outlet channel between the cone guide body and the feeding pipe, powder output from the feeding pipe is conveyed upwards to the position of the grading wheel to be sorted, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to an air inlet structure of a classifier. Background Art

[0002] The classifier is a device that can classify particles of different coarse and fine sizes to obtain powders of the required qualified particle size. The materials in the classifier move to the classification area with the rising airflow under the suction force of the fan. Under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials that move to the classification area with the rising airflow are separated. The fine particles that meet the particle size requirements pass through the classification wheel and enter the next component to be collected, and the coarse particles fall to the crushing area for further crushing. Figure 8 As shown, in order to better guide the particles output from the feed pipe of the classifier to the classifying wheel, a volute component is usually provided between the lower part of the classifying wheel and the output end of the feed pipe, and the volute air outlet is directly opposite to the outlet of the feed pipe. Wind is discharged from the air inlet a1 on the outer side of the volute through the rotation inside the volute and from the air outlet a2 on the inner side of the volute, forming a rotating wind flow, thereby carrying the particles output from the feed pipe to the high-speed rotating classifying wheel above for sorting. However, the existing volute component is designed unreasonably, and the secondary air inlet diversion effect is poor, which cannot efficiently meet the requirements of the classification operation. Utility Model Content

[0003] The utility model improves the above-mentioned problem, that is, the technical problem to be solved by the utility model is to provide an air inlet structure of a classifier, which has a simple structure and is easy to use.

[0004] The utility model is constructed as follows: it comprises a barrel of a classifier and volutes respectively arranged outside the lower part of the barrel, a feed pipe extending to the inside of the barrel is arranged outside the barrel, a guide cone is arranged outside the output section of the feed pipe, an air outlet channel is provided between the guide cone and the feed pipe, and the rotating air flow formed in the volute moves upward through the air outlet and the air outlet channel inside the volute.

[0005] Furthermore, a through hole is provided inside the guide cone, and the diameter of the through hole increases from top to bottom, and the upper opening diameter of the guide cone is larger than the lower opening diameter of the guide cone.

[0006] Furthermore, the volute includes a shell and an opening eccentrically arranged on the inner bottom surface of the volute, and the opening is provided with a plurality of inclined air guide plates along its circumference, and the width of the volute air inlet channel arranged along the outer sides of the plurality of inclined air guide plates decreases successively, and an air outlet of the volute is formed between adjacent air guide plates, and an air inlet connected to the widest air inlet channel position of the volute is arranged on the outer side of the volute.

[0007] Furthermore, an electric air valve is provided at the air inlet of the volute.

[0008] Furthermore, a grading wheel is arranged on the top of the cylinder body, and the grading wheel is driven to rotate by a motor. A plurality of grading feed ports are arranged on the circumference of the grading wheel, and a grading discharge port is arranged above the grading wheel.

[0009] Furthermore, a coarse particle area is provided at the lower part of the cylinder.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the device has a simple structure and is easy to use. The powder is input into the cylinder through the feed pipe, and wind is introduced into the air inlet of the volute. The wind moves circumferentially along the air inlet channel of the volute and is output from the volute air outlet between the inclined air guide plates. The formed rotating airflow passes through the air outlet channel between the guide cone and the feed pipe and moves upward, and the powder output in the feed pipe is brought upward to the grading wheel position for sorting, which can better break up the powder and facilitate driving the powder to the grading wheel position for powder sorting. The fine powder that meets the requirements passes through the grading wheel upward and is transported outward to the fine powder area, while the coarse powder that does not meet the requirements falls downward to the coarse particle area, thereby effectively improving the working efficiency of the classifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view of an embodiment of the utility model;

[0012] Figure 2 for Figure 1 Sectional view AA;

[0013] Figure 3 for Figure 2 A partial enlarged view in FIG.

[0014] Figure 4 The utility model embodiment of the volute, the guide cone three-dimensional Figure 1 ;

[0015] Figure 5 The utility model embodiment of the volute, the guide cone three-dimensional Figure 2 ;

[0016] Figure 6 This is a cross-sectional view of the interior of the volute of the utility model embodiment;

[0017] Figure 7 This is a schematic diagram of the guide cone structure of an embodiment of the utility model;

[0018] Figure 8 It is a schematic diagram of a volute in the prior art. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Example: As shown in the attached Figure 1-7As shown, in this embodiment, a classifier air inlet structure is provided, including a barrel 1 of the classifier and a volute 2 respectively arranged on the outside below the barrel, a feed pipe 3 extending to the inside of the barrel is arranged on the outside of the barrel, a guide cone 4 is arranged on the outside of the output section of the feed pipe, an air outlet channel 5 is provided between the guide cone and the feed pipe, and the rotating airflow formed in the volute moves upward through the air outlet 21 and the air outlet channel 5 on the inner side of the volute.

[0021] During operation, the powder is input into the cylinder through the feed pipe, and wind is introduced into the air inlet of the volute. The wind moves circumferentially along the air inlet channel of the volute and is output from the volute air outlet between the inclined air guide plates. The formed rotating air flow passes through the air outlet channel between the guide cone and the feed pipe and moves upward, and the powder output in the feed pipe is brought upward to the grading wheel position for sorting, which can better break up the powder and drive the powder to the grading wheel position for powder sorting. The fine powder that meets the requirements passes through the grading wheel upward and is transported outward to the fine powder area, while the coarse powder that does not meet the requirements falls downward to the coarse particle area.

[0022] In the embodiment of the utility model, a through hole 41 is provided in the middle of the guide cone, and the diameter of the through hole increases from top to bottom, and the upper opening diameter of the guide cone is larger than the lower opening diameter of the guide cone.

[0023] In an embodiment of the utility model, the volute 2 includes a shell 22 and an opening 23 eccentrically arranged on the inner bottom surface of the volute, and a plurality of inclined air guide plates 24 are arranged along the circumference of the opening. The width of the volute air inlet channel 25 arranged along the outer sides of the plurality of inclined air guide plates decreases successively, and an air outlet 21 of the volute is formed between adjacent air guide plates. An air inlet 26 connected to the widest air inlet channel position of the volute is arranged on the outer side of the volute.

[0024] In the embodiment of the utility model, an electric air valve 27 is provided at the air inlet of the volute.

[0025] In the embodiment of the utility model, a grading wheel 6 is arranged on the top of the cylinder, and the grading wheel is driven to rotate by a motor 7. A plurality of grading feed ports are arranged on the circumference of the grading wheel, and a grading discharge port 8 is arranged above the grading wheel.

[0026] In the embodiment of the utility model, a coarse particle area 9 is provided at the lower part of the cylinder.

[0027] In the embodiment of the utility model, the powder in the feed pipe is transported by the fan connected to the outside of the discharge port of the grading wheel to provide negative pressure to generate power.

[0028] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the utility model, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the utility model.

[0029] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0030] At the same time, if the above-mentioned utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0031] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0032] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated forming process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A classifier air inlet structure, characterized in that: It includes a cylinder of a classifier and a volute respectively arranged on the outside of the lower part of the cylinder, a feed pipe extending to the inside of the cylinder is arranged on the outside of the cylinder, a guide cone is arranged on the outside of the output section of the feed pipe, an air outlet channel is provided between the guide cone and the feed pipe, and the rotating air flow formed in the volute moves upward through the air outlet and the air outlet channel inside the volute.

2. A classifier air inlet structure according to claim 1, characterized in that: A through hole is provided inside the guide cone, and the diameter of the through hole increases from top to bottom. The upper opening diameter of the guide cone is larger than the lower opening diameter of the guide cone.

3. The air inlet structure of a classifier according to claim 1, characterized in that: The volute includes a shell and an opening eccentrically arranged on the inner bottom surface of the volute, and a plurality of inclined air guide plates are arranged along the circumference of the opening. The width of the volute air inlet channel arranged along the outer sides of the plurality of inclined air guide plates decreases successively, and an air outlet of the volute is formed between adjacent air guide plates. An air inlet connected to the widest air inlet channel position of the volute is arranged on the outer side of the volute.

4. A classifier air inlet structure according to claim 3, characterized in that: An electric air valve is arranged at the air inlet of the volute.

5. The air inlet structure of a classifier according to claim 1, characterized in that: A grading wheel is arranged on the top of the cylinder body, and the grading wheel is driven to rotate by a motor. A plurality of grading feed ports are arranged on the circumference of the grading wheel, and a grading discharge port is arranged above the grading wheel.

6. The air inlet structure of a classifier according to claim 1, characterized in that: A coarse particle area is arranged at the lower part of the cylinder.

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