Air separation device for heavy impurities in bulk materials

Abstract

The present invention proposes a heavy impurity air separation device for bulk materials, the air separation device comprises a reducer and a suction fan arranged at the first end of the reducer, wherein the reducer comprises a large diameter portion, a first small diameter portion connected to the first end of the large diameter portion in fluid communication, and a second small diameter portion connected to the second end of the large diameter portion in fluid communication, and a rotary feeder is arranged below the large diameter portion. The heavy impurity air separation device for bulk materials according to the present invention has a simple structure and can quickly and effectively remove sand and stone from bulk materials.

Description

Technical Field

[0001] The invention relates to the technical field of impurity removal equipment, and in particular to a heavy impurity air separation device for bulk materials. Background Art

[0002] Straw, also known as stalk grass in ancient times, refers to the stem and leaf parts of rice, wheat, corn and other gramineous crops that are left after threshing. Rice straw is often called rice straw and rice straw, while wheat straw is called wheat straw. Chinese farmers have a long history of using crop straw. However, due to the low agricultural production level and low yield in the past, the amount of straw was small. Most of the straw was burned as fuel, except for a small amount used for gaskets, feeding livestock, and composting. With the development of agricultural production, China's grain output has increased significantly since the 1980s, and the amount of straw has also increased, resulting in a large amount of surplus straw in rural areas. The use of straw has become more and more extensive, one of the applications of which is to make straw into straw boards. Moreover, since the made straw boards have the advantages of being waterproof, fireproof, soundproof, heat-insulating, non-toxic, non-corrosive, non-radioactive, lightweight, and easy to construct and install, the application range of straw boards is more extensive.

[0003] In the current production process of straw boards, the quality of bulk straw materials directly affects the quality and performance of the finished boards. The most important point in evaluating the quality of straw raw materials is whether there are hard impurities mixed in the bulk straw materials. Since the picking and packaging of straw are carried out in the field, it is inevitable that hard impurities such as stones, nails, and wires will be mixed in it. In actual production, the installation of an iron remover can achieve a good removal effect on the ferromagnetic impurities mixed in the straw. However, there has been no good way to remove sand and stones, and it is often removed by workers, which is both manpower-consuming and ineffective. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a heavy impurity air separation device for bulk materials which has a simple structure and can effectively remove heavy impurities such as sand and stone in the bulk materials.

[0005] The present invention proposes a heavy impurity air separation device for bulk materials, the air separation device includes a reducer and a suction fan arranged at the first end of the reducer, wherein the reducer includes a large diameter portion, a first small diameter portion fluidically connected to the first end of the large diameter portion, and a second small diameter portion fluidically connected to the second end of the large diameter portion, and a rotary feeder is provided below the large diameter portion.

[0006] Preferably, an adjusting tube is sleeved in the first small diameter portion, and the adjusting tube can move in the first small diameter portion to change the moving distance of the bulk material in the large diameter portion.

[0007] Preferably, the first small diameter portion includes a first straight tube, one or more elongated holes are arranged along the circumferential direction of the first straight tube, and bolts are arranged at positions of the adjusting tube corresponding to the elongated holes, the bolts pass through the elongated holes, and nuts are arranged on the bolts.

[0008] Preferably, the large diameter portion includes a second straight pipe and a first connecting pipe and a second connecting pipe located at two ends of the second straight pipe.

[0009] Preferably, the first connecting pipe and the second connecting pipe are truncated cone-shaped connecting pipes, the first connecting pipe fluidically connects the second straight pipe and the first straight pipe, and the second connecting pipe fluidically connects the second straight pipe and the second small-diameter portion.

[0010] Preferably, an end of the first straight pipe away from the large diameter portion is connected to a suction fan, and an end of the second small diameter portion away from the large diameter portion is fluidically connected to a material crusher via a conveying pipe.

[0011] Preferably, the rotary feeder is disposed below the second straight pipe, and the rotary feeder is fluidically connected to the second straight pipe.

[0012] Preferably, the discharge port of the rotary feeder is provided with a sand and stone collecting device.

[0013] Preferably, the diameter of the second straight pipe is 1.4 to 1.8 times the diameter of the first straight pipe.

[0014] Preferably, the diameter of the second straight pipe is 1.6 times the diameter of the first straight pipe.

[0015] The heavy impurity air separation device for bulk materials described in the present invention, after the suction fan and the material crusher are turned on, the bulk materials in the material crusher enter the reducer. Since the diameter of the large diameter part and the first small diameter part in the reducer are quite different, the wind speed of the large diameter part and the first small diameter part are different, wherein the wind speed of the large diameter part is relatively low, and the wind speed of the first small diameter part is relatively high. Since the bulk materials have a relatively low mass, they are easily sucked away by the suction fan, while the sand and gravel in the bulk materials have a relatively high mass and will fall into the rotary feeder due to the action of gravity. Moreover, when bulk materials are found in the rotary feeder, the wind speed in the first small diameter part can be adjusted. The adjusting tube moves toward the large diameter portion, increasing its length in the large diameter portion to reduce the distance that the bulk material moves in the large diameter portion, and the bulk material can be sucked away by the suction fan. When sand and gravel are found in the sucked away bulk material, the adjusting tube is adjusted to move toward the first small diameter portion, reducing its length in the large diameter portion to increase the distance that the sand and gravel move in the large diameter portion, thereby causing the sand and gravel to fall into the rotary feeder, thereby realizing the separation of the bulk material from the sand and gravel. Therefore, by adjusting the position of the adjusting tube in the reducer, the bulk material and the sand and gravel can be separated quickly and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a reducer pipe of a heavy impurity air separation device for bulk materials according to the present invention;

[0017] Figure 2 It is a schematic structural diagram of a heavy impurity air separation device for bulk materials according to the present invention;

[0018] Among them, 1-the second straight pipe, 2-the first connecting pipe, 3-the long hole, 4-the nut, 5-the adjusting pipe, 6-the first straight pipe, 7-the rotary feeder, 8-the second connecting pipe, 9-the suction fan, 10-the material crusher, 11-the conveying pipe, and 12-the second small diameter part. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not have to be used to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, materials or methods are not specifically described.

[0020] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example

[0022] like Figure 1 and Figure 2 As shown, the present invention relates to a heavy impurity air separation device for bulk materials, the air separation device comprises a reducer and a suction fan 9 arranged at a first end of the reducer, wherein the reducer comprises a large diameter portion, a first small diameter portion fluidically connected to the first end of the large diameter portion, and a second small diameter portion 12 fluidically connected to the second end of the large diameter portion, and a rotary feeder 7 is arranged below the large diameter portion. When the suction fan 9 is turned on, after the bulk material in the material crusher 10 enters the reducer, due to the large difference in pipe diameter between the large diameter portion and the first small diameter portion in the reducer, the wind speed of the large diameter portion and the first small diameter portion is different, and the wind speed is inversely proportional to the pipe diameter, the wind speed of the large diameter portion is smaller, and the wind speed of the first small diameter portion is larger. Since the bulk material has a smaller mass, it is easily sucked away by the suction fan 9, while the sand and gravel in the bulk material has a larger mass and will fall into the rotary feeder 7 due to the action of gravity, thereby effectively separating the bulk material from the sand and gravel.

[0023] An adjusting tube 5 is sleeved in the first small diameter part, and the adjusting tube 5 can move in the first small diameter part to change the distance that the bulk material moves in the large diameter part. When bulk material is found in the rotary feeder 7, the adjusting tube 5 in the first small diameter part can be adjusted to move toward the large diameter part, and its length in the large diameter part can be increased to reduce the distance that the bulk material moves in the large diameter part, so that the bulk material is sucked away by the suction fan 9. When sand and stone are found in the sucked away bulk material, the adjusting tube 5 is adjusted to move toward the first small diameter part, and its length in the large diameter part can be reduced to increase the distance that the sand and stone move in the large diameter part, so that the sand and stone fall into the rotary feeder 7, so as to achieve the separation of bulk material and sand and stone. Therefore, by adjusting the position of the adjusting tube 5 in the reducer, the bulk material and sand and stone can be separated quickly and effectively.

[0024] The first small diameter portion includes a first straight tube 6, which is provided with one or more elongated holes 3. When the first straight tube 6 is provided with a plurality of elongated holes 3, preferably, the plurality of elongated holes 3 are symmetrically arranged along the circumferential direction of the first straight tube 6 and about the axis of the first straight tube 6, and a bolt is arranged at a position of the adjusting tube 5 corresponding to the elongated hole 3, the bolt passes through the elongated hole 3, and a nut 4 is arranged on the bolt; the bolt passes through the elongated hole 3, and the bolt can move in the elongated hole 3, thereby driving the adjusting tube 5 to move in the reducer, and when the adjusting tube 5 moves to the specified position, the bolt is fixed to the first straight tube 6 by the nut 4, and then the adjusting tube 5 is fixedly connected to the reducer; in addition, the more the number of elongated holes 3 is, the more firmly the fixing connection between the adjusting tube 5 and the reducer is through the nut 4, and when it is necessary to adjust the position of the adjusting tube 5 in the reducer, the nut 4 is loosened from the bolt, and then after the adjusting tube 5 is moved to the specified position, the bolt is firmly fixed to the first straight tube 6 by the nut 4.

[0025] The large diameter portion includes a second straight pipe 1 and a first connecting pipe 2 and a second connecting pipe 8 located at both ends of the second straight pipe 1; the first connecting pipe 2 and the second connecting pipe 8 are truncated cone-shaped connecting pipes (the wind speed in the truncated cone-shaped connecting pipe changes with the change of the pipe diameter). Preferably, the first connecting pipe 2 and the second connecting pipe 8 are the same truncated cone-shaped connecting pipes, the first connecting pipe 2 fluidically connects the second straight pipe 1 and the first straight pipe 6, and the second connecting pipe 8 fluidically connects the second straight pipe 1 and the second small diameter portion 12. With such a connection method, the connection is tight and not easy to be damaged or leaked.

[0026] The end of the first straight pipe 6 away from the large diameter part is connected to the suction fan 9, and the end of the second small diameter part 12 away from the large diameter part is fluidically connected to the material crusher 10 through the conveying pipe 11. When the material crusher 10 crushes the material, the suction fan 9 is turned on to generate strong wind force in the reducer and the conveying pipe 11. Under the action of the wind force, the bulk material enters the reducer through the conveying pipe 11. Finally, due to the different wind speeds between the large diameter part and the first small diameter part in the reducer, the bulk material is separated from sand and gravel.

[0027] The rotary feeder 7 is arranged below the second straight pipe 1, and the rotary feeder 7 is fluidically connected to the second straight pipe 1. The discharge port of the rotary feeder 7 is provided with a sand and stone collecting device. When the bulk material enters the reducer, the wind speed of the large diameter portion is different from that of the first small diameter portion. Since the mass of the sand and stone is large, the gravity generated is also large. When the sand and stone enter the large diameter portion, they fall to the bottom of the second straight pipe 1, and then enter the rotary feeder 7, and then enter the sand and stone collecting device through the rotary feeder 7.

[0028] The diameter of the second straight pipe 1 is 1.4 times to 1.8 times the diameter of the first straight pipe 6; preferably, the diameter of the second straight pipe 1 is 1.6 times the diameter of the first straight pipe 6. When the diameter of the second straight pipe 1 is 900 cm, the diameter of the first straight pipe 6 is 550 cm, and the diameter of the regulating pipe 5 is slightly smaller than the diameter of the first straight pipe 6, the wind speed in the regulating pipe 5 is 30 m / s, and the wind speed in the second straight pipe 1 is 11 m / s. The difference in wind speed between the second straight pipe 1 and the regulating pipe 5 is large. When bulk materials mixed with sand and gravel pass through the first straight pipe 6 with a smaller wind speed, the sand and gravel fall off, and the bulk materials enter the regulating pipe 5. Since the wind speed in the regulating pipe 5 is large, the bulk materials can pass through the regulating pipe 5 quickly.

[0029] According to the heavy impurity air separation device for bulk materials of the present invention, when in use, the suction fan 9 and the material crusher 10 are first turned on. The material crusher 10 discharges the bulk material obtained after crushing the material into the conveying pipe 11. Under the action of the wind force generated by the suction fan 9, the conveying pipe 11 conveys the bulk material containing sand and stone into the reducer. Since the second straight pipe 1 at the large diameter part and the first straight pipe 6 at the first small diameter part in the reducer have different diameters, the wind speed at different diameters is different. Therefore, the wind speed at the second straight pipe 1 at the large diameter part is relatively small. The sand and stone with larger mass drop to the bottom of the second straight pipe 1 due to the action of gravity, and then enter the rotary feeder 7 to be discharged. The bulk material with smaller mass is sucked away through the regulating pipe 5 and the first straight pipe 6, thereby realizing the separation of the bulk material and the sand and stone. When bulk materials are found in the rotary feeder 7, it means that the bulk materials have weak wind force for a long time when passing through the second straight pipe 1, and they fall due to gravity, and are not sucked away by the suction fan 9. If such a situation occurs, the adjusting nut 4 is adjusted to move the adjusting tube 5, and the adjusting tube 5 moves toward the large diameter portion, so that the adjusting tube 5 further extends into the second straight pipe 1, so as to increase the length of the adjusting tube 5 in the second straight pipe 1, and reduce the effective length of the bulk materials when passing through the second straight pipe 1, so that the adjusting tube 5 can quickly enter the adjusting tube 5, and then separate the bulk materials from the sand and gravel; when sand and gravel are found in the bulk materials after passing through the reducer, the adjusting nut 4 is adjusted to move the adjusting tube 5, and the adjusting tube 5 moves toward the first small diameter portion, so that the adjusting tube 5 moves toward the first straight pipe 6, so as to reduce the length of the adjusting tube 5 in the second straight pipe 1, and increase the effective length of the bulk materials when passing through the second straight pipe 1, so that the sand and gravel can fall in the second straight pipe 1 and enter the rotary feeder 7, and then effectively separate the bulk materials from the sand and gravel. Therefore, by adjusting the position of the regulating tube 5 in the reducer, the bulk material and the sand and gravel can be separated quickly and effectively. The heavy impurity air separation device for bulk materials described in the present invention can be used to remove heavy impurities such as sand and gravel in bulk materials such as crushed straw.

[0030] Although the separation of sand and stone impurities in straw materials is used as an example to illustrate the heavy impurity air separation device for bulk materials according to the present invention, a person skilled in the art should understand that the heavy impurity air separation device according to the present invention can be used to remove impurities in other bulk materials, as long as there is a density difference between the processed bulk material and the impurities, for example, it can be used to remove heavy impurities in powdery or granular materials.

[0031] Although the present invention has been described with reference to typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the claims or their equivalents should be covered by the appended claims.

Claims

1. A device for air separation of heavy impurities in bulk materials, characterized in that: The wind selection device comprises a reducer and a suction fan arranged at a first end of the reducer, wherein the reducer comprises a large diameter portion, a first small diameter portion connected to the first end of the large diameter portion in fluid communication, and a second small diameter portion connected to the second end of the large diameter portion in fluid communication, and a rotary feeder is arranged below the large diameter portion; An adjusting tube is sleeved in the first small diameter portion, and the adjusting tube can move in the first small diameter portion to change the distance that the bulk material moves in the large diameter portion; The first small diameter portion includes a first straight tube, one or more elongated holes are arranged along the circumferential direction of the first straight tube, and bolts are arranged at positions of the adjusting tube corresponding to the elongated holes, the bolts pass through the elongated holes, and nuts are arranged on the bolts; The plurality of elongated holes are symmetrically arranged along a circumferential direction of the first straight tube and about an axis of the first straight tube.

2. The heavy impurity air separation device for bulk materials according to claim 1 is characterized in that: The large diameter portion includes a second straight pipe and a first connecting pipe and a second connecting pipe located at two ends of the second straight pipe.

3. The heavy impurity air separation device for bulk materials according to claim 2 is characterized in that: The first connecting pipe and the second connecting pipe are truncated cone-shaped connecting pipes. The first connecting pipe connects the second straight pipe and the first straight pipe in fluid communication, and the second connecting pipe connects the second straight pipe and the second small-diameter portion in fluid communication.

4. The heavy impurity air separation device for bulk materials according to claim 3 is characterized in that: An end of the first straight pipe away from the large diameter portion is connected to a suction fan, and an end of the second small diameter portion away from the large diameter portion is connected to a material crusher through a conveying pipe fluid communication.

5. The heavy impurity air separation device for bulk materials according to claim 4 is characterized in that: The rotary feeder is disposed below the second straight pipe, and the rotary feeder is in fluid communication with the second straight pipe.

6. The heavy impurity air separation device for bulk materials according to claim 5 is characterized in that: The discharge port of the rotary feeder is provided with a sand and stone collecting device.

7. The heavy impurity air separation device for bulk materials according to claim 6 is characterized in that: The diameter of the second straight pipe is 1.4 to 1.8 times the diameter of the first straight pipe.

8. The heavy impurity air separation device for bulk materials according to claim 7 is characterized in that: The diameter of the second straight pipe is 1.6 times the diameter of the first straight pipe.

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