阅读说明：本技术 一种导流式烟梗分选筛及筛分装置 (Diversion type tobacco stem sorting screen and screening device ) 是由 李悦 田涛 杨永锋 刘茂林 刘向真 杨欣玲 刘超 孙九喆 贾国涛 白银帅 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种导流式烟梗分选筛及筛分装置,导流式烟梗分选筛的筛面上设有多条沿着筛面的长度方向延伸的凸起,相邻凸起的之间形成有筛孔,凸起上设有用于将烟梗引向筛孔的导向面,导向面与筛孔所在的平面形成夹角；筛孔包括顺次排布的细梗筛分段、中梗筛分段和梗拐筛分段,细梗筛分段、中梗筛分段和梗拐筛分段的宽度沿着筛面的长度方向逐渐增大,且细梗筛分段、中梗筛分段和梗拐筛分段之间的连接处线性过渡。本公开的导流式烟梗分选筛的筛面上的凸起可避免烟梗团聚,凸起之间的筛孔上多个筛分段的设置使得导流式烟梗分选筛可在单层筛的基础上实现不同粗细的烟梗的筛分,筛分效率高,且不易卡料。(The invention discloses a flow guide type tobacco stem separating screen and a screening device, wherein a plurality of bulges extending along the length direction of a screen surface are arranged on the screen surface of the flow guide type tobacco stem separating screen, screen holes are formed between every two adjacent bulges, guide surfaces used for guiding tobacco stems to the screen holes are arranged on the bulges, and an included angle is formed between each guide surface and the plane where the screen holes are located; the sieve pores comprise a fine stem sieve section, a middle stem sieve section and a stem-turn sieve section which are arranged in sequence, the widths of the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are gradually increased along the length direction of the sieve surface, and the connection parts among the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are in linear transition. The bulges on the screen surface of the flow-guiding tobacco stem separating screen can avoid tobacco stem agglomeration, the arrangement of the screen holes between the bulges and the screen segments enables the flow-guiding tobacco stem separating screen to realize the screening of tobacco stems with different thicknesses on the basis of a single-layer screen, the screening efficiency is high, and the tobacco stems are not easy to block.)

1. A flow guide type tobacco stem separating screen is characterized in that a plurality of bulges extending along the length direction of a screen surface are arranged on the screen surface of the flow guide type tobacco stem separating screen, screen holes are formed between every two adjacent bulges, guide surfaces used for guiding tobacco stems to the screen holes are arranged on the bulges, and included angles are formed between the guide surfaces and the plane where the screen holes are located;

the sieve pores comprise a fine stem sieve section, a middle stem sieve section and a stem-turn sieve section which are sequentially arranged, the widths of the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are gradually increased along the length direction of the sieve surface, and the connection positions of the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are in linear transition.

2. The flow-guided stem sorting screen of claim 1, wherein the edges of adjacent projections on the bottom surface of the screening surface form the screen openings.

3. The flow-guiding tobacco stem separating screen as claimed in claim 1, wherein the included angle is 50-70 °.

4. The flow-guided tobacco stem sorting screen of claim 1, wherein the cross-section of the protrusion along the width direction of the screen surface is triangular.

5. The flow-guiding tobacco stem separating screen as claimed in claim 4, wherein the cross section of the protrusions along the width direction of the screen surface is an equilateral triangle.

6. The flow-guided tobacco stem sorting screen of claim 1, wherein the cross-section of the protrusion along the width direction of the screen surface is semicircular.

7. The flow-guided tobacco stem sorting screen according to any one of claims 1 to 6, wherein the height of the protrusions is 20-40% of the maximum width of the screen holes.

8. The flow-guiding tobacco stem sorting screen as claimed in any one of claims 1 to 6, wherein the minimum width of the fine stem screening section is 1-3mm, and the maximum width of the stem turning screening section is 12-20 mm.

9. The flow-guiding type tobacco stem separating screen as claimed in any one of claims 1 to 6, wherein the length of the fine stem screen section is the same as that of the stem turning screen section, and the length of the middle stem screen section is 2-4 times that of the fine stem screen section.

10. A screening device comprising a flow-directing tobacco stem screening screen according to any one of claims 1 to 9.

Technical Field

The invention relates to the field of tobacco processing, in particular to a diversion type tobacco stem sorting screen and a sorting device.

Background

The tobacco stems need to be cut into threads in the cigarette production process so as to obtain the cut stems which can be directly used for cigarette production. In the production process of cut stems, the main factors influencing the cutting quality of the tobacco stems are the thickness, the length and the uniformity of the tobacco stems. However, the shape of the tobacco stem is changed more, especially the stem turns in the tobacco stem, and the shredding operation is affected because the shape is irregular.

The existing tobacco stem screening devices are divided into two types. A screen cloth of tobacco stalk screening plant is the individual layer mesh screen that has the round hole, and this kind of tobacco stalk screening plant's screening efficiency is low and easy blind grain (the granularity is between 1.00 ~ 1.10 times sieve pore diameter) stifled hole phenomenon appears. Another kind of offal screening plant has the screen cloth of multilayer layering arrangement, and the screen cloth of different layers has the sieve mesh of different grade type, for example bar hole, square hole or round hole etc. and this kind of offal screening plant's screening efficiency is lower.

However, the existing tobacco stem screening device has high degree of distinguishing the length of the tobacco stems, for example, the degree of distinguishing long stems (the length is more than 20mm) from short stems (the length is less than or equal to 20mm) is high, and the distinguishing and removing effect on the thickness of the tobacco stems, especially the stem stalks, is poor. The screened finished tobacco stems are often mixed with a certain proportion of fine stems and stem stalks. In addition, in the screening process, the screen is easily blocked by the stalk turns with irregular shapes, the screen needs to be cleaned frequently, and the working efficiency is influenced.

Therefore, how to provide a sorting screen capable of effectively distinguishing the thickness of the tobacco stems becomes a technical problem which needs to be solved urgently in the field.

Disclosure of Invention

The invention aims to provide a new technical scheme of a flow guide type tobacco stem sorting screen capable of effectively distinguishing the thickness of tobacco stems.

According to a first aspect of the invention, a flow-guiding tobacco stem sorting screen is provided.

The sieve surface of the diversion type tobacco stem sorting sieve is provided with a plurality of bulges extending along the length direction of the sieve surface, sieve pores are formed between every two adjacent bulges, the bulges are provided with guide surfaces used for guiding tobacco stems to the sieve pores, and an included angle is formed between each guide surface and the plane where the sieve pores are located;

the sieve pores comprise a fine stem sieve section, a middle stem sieve section and a stem-turn sieve section which are sequentially arranged, the widths of the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are gradually increased along the length direction of the sieve surface, and the connection positions of the fine stem sieve section, the middle stem sieve section and the stem-turn sieve section are in linear transition.

Optionally, the edges of adjacent projections on the underside of the screening surface form the screening apertures.

Optionally, the included angle is 50-70 °.

Optionally, the cross-section of the protrusion along the width direction of the screening surface is triangular.

Optionally, the cross section of the protrusion along the width direction of the screen surface is an equilateral triangle.

Optionally, the cross-section of the protrusion along the width direction of the screening surface is semi-circular.

Optionally, the height of the protrusions is 20-40% of the maximum width of the mesh.

Optionally, the minimum width of the fine stalk sieve section is 1-3mm, and the maximum width of the stalk sieve section is 12-20 mm.

Optionally, the length of the fine stalk sieve section is the same as that of the stalk turning sieve section, and the length of the middle stalk sieve section is 2-4 times that of the fine stalk sieve section.

According to a second aspect of the present invention, there is provided a screening device.

The screening device comprises the flow guide type tobacco stem screening screen.

The bulges on the screen surface of the flow-guiding tobacco stem separating screen can avoid tobacco stem agglomeration, the arrangement of the screen holes between the bulges and the screen segments enables the flow-guiding tobacco stem separating screen to realize the screening of tobacco stems with different thicknesses on the basis of a single-layer screen, the screening efficiency is high, and the tobacco stems are not easy to block.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a first embodiment of a flow-guiding type tobacco stem sorting screen disclosed in the present disclosure.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a schematic structural view of a second embodiment of the flow-guiding type tobacco stem sorting screen disclosed in the present disclosure.

Fig. 4 is a cross-sectional view of fig. 3.

The figures are labeled as follows:

bulge-1, guide surface-10, screen hole-2, fine stem screening section-21, middle stem screening section-22 and stem crutch screening section-23.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1-4, the present disclosure provides a flow-directing tobacco stem sorting screen. The screen surface of the diversion type tobacco stem sorting screen is provided with a plurality of bulges 1 extending along the length direction of the screen surface. Sieve holes 2 are formed between the adjacent protrusions 1. The projections 1 are provided with guide surfaces 10 for guiding the tobacco stems towards the screen holes 2. The guide surfaces 10 form an angle with the plane of the screening openings 2.

The shape of the protrusion 1 can be flexibly selected according to actual requirements, such as a triangular pyramid shape or a conical shape. The openings 2 can be formed directly by the edges of the projections 1, or the edges of the openings 2 can be spaced apart from the edges of the projections 1.

The sieve holes 2 comprise a fine stalk sieve section 21, a middle stalk sieve section 22 and a stalk turning sieve section 23 which are sequentially arranged (the straight line which is intersected with the sieve holes 1 in the figure is only used for distinguishing each sieve section). Each screen hole 2 has a fine stalk screen section 21, a medium stalk screen section 22, and a stalk turn screen section 23. The widths of the fine stem screening section 21, the middle stem screening section 22 and the stem turning screening section 23 are gradually increased along the length direction of the screening surface, and the connection positions among the fine stem screening section 21, the middle stem screening section 22 and the stem turning screening section 23 are in linear transition. The linear transition means that no bulge or corner exists at the joint of each screen section, and the screen sections are in a straight line shape.

When the flow guide type tobacco stem sorting screen is used, after tobacco stems fall into the screen surface, the protrusions 1 disperse the agglomerated tobacco stems, and the tobacco stems are guided to the screen holes 2 through the guide surfaces 10 on the protrusions 1. The tobacco stems move from the fine stem screening section 21 to the stem turning screening section 23 (the direction of an arrow in fig. 1 and 3 is the moving direction of the tobacco stems), the thinner tobacco stems are screened out from the fine stem screening section 21, the thicker stem turns are screened out from the stem turning screening section 23, and the tobacco stems suitable for shredding operation are screened out from the middle stem screening section 22, so that the purpose of screening according to the thickness of the tobacco stems is effectively realized.

Because the protrusions 1 on the flow guide type tobacco stem sorting screen can disperse the agglomerated tobacco stems, and the guide surface 10 can guide the tobacco stems to the screen holes 2, the problem of tobacco stem agglomeration is not easy to occur, and the screening work efficiency is high. Moreover, the tobacco stems move along the sieve holes 2 extending in the length direction of the sieve surface of the flow guide type tobacco stem sorting sieve, the sieve holes 2 are not easily blocked by the tobacco stems, and the sieving work efficiency is effectively improved.

The bulges 1 on the screen surface of the flow-guiding type tobacco stem separating screen can avoid tobacco stem agglomeration, the arrangement of the screen holes 2 between the bulges 1 in the multiple screen sections enables the flow-guiding type tobacco stem separating screen to realize the screening of tobacco stems with different thicknesses on the basis of a single-layer screen, the screening efficiency is high, and the blocking of materials is not easy.

In one embodiment of the flow-directing stem sorting screen of the present disclosure, the edges of adjacent projections 1 on the bottom surface of the screening surface form screen apertures 2. The bottom surface of the screen surface refers to the plane on which the screen holes 2 are located. The flow guide type tobacco stem sorting screen with the structure enables tobacco stems to directly enter the screen holes 2 from the guide surface 10, so that the screening efficiency is improved.

In one embodiment of the flow-directing tobacco stem sorting screen of the present disclosure, the included angle is 50 ° to 70 ° in order to improve the screening efficiency.

As shown in fig. 1 and 2, in one embodiment of the flow-guiding stem sorting screen of the present disclosure, the cross section of the protrusion 1 along the width direction of the screen surface is triangular (the direction indicated by the arrow in fig. 2 is the screening direction of the stem). The tip of the protrusion 1 having a triangular section can disperse tobacco stems more rapidly and effectively, thereby improving the sieving efficiency.

Further, the cross section of the protrusion 1 along the width direction of the screen surface is an equilateral triangle.

As shown in fig. 3 and 4, in one embodiment of the flow-guide stem sorting screen of the present disclosure, the cross section of the protrusion 1 along the width direction of the screen surface is semicircular (the direction indicated by the arrow in fig. 4 is the screening direction of the stem). The projections 1 having a semicircular cross section can guide the tobacco stems to the screen holes 2 more rapidly, thereby improving the screening efficiency.

In one embodiment of the flow-guiding tobacco stem sorting screen of the present disclosure, in order to improve the rate of the tobacco stems entering the screen holes 2 while dispersing the agglomerated tobacco stems, the height of the protrusions 1 is 20-40% of the maximum width of the screen holes 2.

In one embodiment of the flow-guiding tobacco stem sorting screen of the present disclosure, the minimum width of the fine stem screening segment 21 is 1-3mm, and the maximum width of the stem turning screening segment 23 is 12-20 mm.

In one embodiment of the flow guide type tobacco stem sorting screen disclosed by the invention, the length of the fine stem screening section 21 is the same as that of the stem turning screening section 23, and the length of the middle stem screening section 22 is 2-4 times of that of the fine stem screening section 21.

The disclosure also provides a screening device, which comprises the flow guide type tobacco stem screening screen.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.