阅读说明：本技术 一种烟梗筛分装置 (Tobacco stalk screening device ) 是由 杨永锋 李悦 刘茂林 田涛 王宝林 王新中 刘超 刘向真 赵森森 牛洋洋 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种烟梗筛分装置,包括烟梗分选筛、振动机构和接料机构；烟梗分选筛的筛面上设有沿着筛面的长度方向延伸的筛孔,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；筛面与水平面之前具有夹角；接料机构包括接料仓,接料仓包括细梗接料仓、中梗接料仓和梗拐接料仓。本公开的烟梗筛分装置的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。而且,烟梗沿着筛孔自处于筛面上较高处的细梗筛分段逐渐移动至处于筛面上较低处的梗拐筛分段,筛分效果好。(The invention discloses a tobacco stem screening device which comprises a tobacco stem screening sieve, a vibration mechanism and a material receiving mechanism, wherein the tobacco stem screening sieve is arranged on the tobacco stem screening sieve; the tobacco stem separating screen is characterized in that screen holes extending along the length direction of the screen surface are formed in the screen surface of the tobacco stem separating screen, each screen hole comprises a fine stem screen section, a middle stem screen section and a stem turning screen section which are sequentially arranged, and the widths of the fine stem screen section, the middle stem screen section and the stem turning screen section are gradually increased along the length direction of the screen surface; an included angle is formed between the screen surface and the horizontal plane; the receiving mechanism comprises a receiving bin, and the receiving bin comprises a fine stem receiving bin, a middle stem receiving bin and a stem turning receiving bin. The tobacco stem sorting screen of the tobacco stem sorting device can realize the sorting of tobacco stems with different thicknesses on the basis of a single-layer screen, is high in sorting efficiency, and is not easy to clamp materials. Moreover, the tobacco stems gradually move from the fine stem screening section at the higher part of the screen surface to the stem turning screening section at the lower part of the screen surface along the screen holes, and the screening effect is good.)

1. A tobacco stem screening device is characterized by comprising a tobacco stem screening sieve, a vibration mechanism and a material receiving mechanism; wherein the content of the first and second substances,

the tobacco stem separating screen is characterized in that screen holes extending along the length direction of the screen surface are formed in the screen surface of the tobacco stem separating screen, the screen holes comprise a fine stem screen section, a middle stem screen section and a stem turning screen section which are sequentially arranged, the widths of the fine stem screen section, the middle stem screen section and the stem turning screen section are gradually increased along the length direction of the screen surface, and the connecting positions of the fine stem screen section, the middle stem screen section and the stem turning screen section are in linear transition;

an included angle is formed between the screen surface and the horizontal plane, and the height of the fine stalk screening section relative to the horizontal plane is larger than that of the stalk turning screening section relative to the horizontal plane;

the vibration mechanism is arranged for vibrating the tobacco stem sorting screen;

the material receiving mechanism comprises a material receiving bin, the material receiving bin comprises a fine stem material receiving bin, a middle stem material receiving bin and a stem turning material receiving bin, and the fine stem material receiving bin, the middle stem material receiving bin and the stem turning material receiving bin are respectively in one-to-one correspondence with the fine stem screening section, the middle stem screening section and the stem turning screening section.

2. The tobacco stem screening device according to claim 1, wherein the screening surface is a rectangular screening surface, a first baffle portion in an isosceles trapezoid shape is arranged between adjacent small stem screening sections, a second baffle portion in an isosceles trapezoid shape is arranged between adjacent middle stem screening sections, and a third baffle portion in an isosceles triangle shape is arranged between adjacent stem turning screening sections.

3. The tobacco stem screening device according to claim 2, wherein the screen hole further comprises an anti-blocking section, the anti-blocking section is connected with one end of the stem screening section, which is far away from the stem screening section, the width of the anti-blocking section is gradually increased along the direction far away from the stem screening section, the maximum width of the anti-blocking section is larger than the minimum width of the stem screening section and smaller than 75% of the maximum width of the stem screening section, and the length of the anti-blocking section is smaller than 10% of the length of the stem screening section.

4. The tobacco stem screening device according to claim 3, wherein a fourth barrier is arranged between adjacent anti-clogging segments, and the edge of the fourth barrier forming the sieve hole has an arc shape.

5. The tobacco stem screening device according to claim 1, wherein the screen surface is a fan-shaped screen surface, both ends of the screen surface in the length direction are arc-shaped surfaces, and the screen holes are radially arranged along the screen surface.

6. The tobacco stem screening device according to claim 1, wherein a plurality of protrusions extending along the length direction of the screen surface are arranged on the screen surface of the tobacco stem screening screen, the edges of the adjacent protrusions on the bottom surface of the screen surface form the screen holes, guide surfaces for guiding tobacco stems to the screen holes are arranged on the protrusions, and the guide surfaces form included angles with the plane where the screen holes are located.

7. The tobacco stem screening device according to claim 6, wherein the cross section of the protrusion along the width direction of the screening surface is triangular or semicircular.

8. The tobacco stem screening device according to claim 6, wherein the height of said protrusions is 20-40% of the maximum width of said screen holes.

9. The tobacco stem screening device according to claim 1, 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.

10. The tobacco stem screening device according to any one of claims 1 to 9, wherein the receiving mechanism further comprises a flow guide assembly;

the guide assembly comprises a support rod, a first separation guide plate, a second separation guide plate and a separation guide plate fixing piece, wherein the first separation guide plate is used for separating at least part of space between the fine stem receiving bin and the tobacco stem separating screen and between the middle stem receiving bin and the tobacco stem separating screen into two areas and guiding tobacco stems screened by the fine stem screening screen into the fine stem receiving bin, the second separation guide plate is used for separating at least part of space between the middle stem receiving bin and the tobacco stem separating screen and between the stem corner receiving bin and the tobacco stem separating screen into two areas and guiding the tobacco stems screened by the middle stem screening segment into the middle stem receiving bin;

the first separation guide plate and the second separation guide plate are rotatably connected with the supporting rod, and the separation guide plate fixing piece is used for fixing the positions of the first separation guide plate and the second separation guide plate on the supporting rod.

Technical Field

The invention relates to the field of tobacco processing, in particular to a tobacco stem screening 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 screening device 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 novel technical scheme of a tobacco stem screening device capable of effectively distinguishing the thickness of tobacco stems.

According to a first aspect of the invention, a tobacco stem screening device is provided.

The tobacco stem screening device comprises a tobacco stem screening sieve, a vibration mechanism and a material receiving mechanism; wherein the content of the first and second substances,

the tobacco stem separating screen is characterized in that screen holes extending along the length direction of the screen surface are formed in the screen surface of the tobacco stem separating screen, the screen holes comprise a fine stem screen section, a middle stem screen section and a stem turning screen section which are sequentially arranged, the widths of the fine stem screen section, the middle stem screen section and the stem turning screen section are gradually increased along the length direction of the screen surface, and the connecting positions of the fine stem screen section, the middle stem screen section and the stem turning screen section are in linear transition;

an included angle is formed between the screen surface and the horizontal plane, and the height of the fine stalk screening section relative to the horizontal plane is larger than that of the stalk turning screening section relative to the horizontal plane;

the vibration mechanism is arranged for vibrating the tobacco stem sorting screen;

the material receiving mechanism comprises a material receiving bin, the material receiving bin comprises a fine stem material receiving bin, a middle stem material receiving bin and a stem turning material receiving bin, and the fine stem material receiving bin, the middle stem material receiving bin and the stem turning material receiving bin are respectively in one-to-one correspondence with the fine stem screening section, the middle stem screening section and the stem turning screening section.

Optionally, the screen surface is a rectangular screen surface, first blocking parts in an isosceles trapezoid shape are arranged between adjacent small-stalk screening sections, second blocking parts in an isosceles trapezoid shape are arranged between adjacent middle-stalk screening sections, and third blocking parts in an isosceles triangle shape are arranged between adjacent stalk-turning screening sections.

Optionally, the sieve mesh further includes an anti-blocking section, the anti-blocking section is connected to one end, far away from the middle stem sieve section, of the fine stem sieve section, the width of the anti-blocking section is gradually increased along a direction far away from the fine stem sieve section, the maximum width of the anti-blocking section is greater than the minimum width of the middle stem sieve section and less than 75% of the maximum width of the middle stem sieve section, and the length of the anti-blocking section is less than 10% of the length of the fine stem sieve section.

Optionally, a fourth blocking portion is arranged between adjacent anti-blocking sections, and the edge of the fourth blocking portion forming the sieve hole has an arc shape.

Optionally, the screen surface is a fan-shaped screen surface, both ends of the length direction of the screen surface are arc-shaped surfaces, and the screen holes are radially arranged along the screen surface.

Optionally, a plurality of protrusions extending along the length direction of the screen surface are arranged on the screen surface of the tobacco stem sorting screen, the edges of the adjacent protrusions on the bottom surface of the screen surface form the screen holes, guide surfaces used for guiding the tobacco stems to the screen holes are arranged on the protrusions, and included angles are formed between the guide surfaces and the plane where the screen holes are located.

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

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 receiving mechanism further comprises a flow guide assembly;

the guide assembly comprises a support rod, a first separation guide plate, a second separation guide plate and a separation guide plate fixing piece, wherein the first separation guide plate is used for separating at least part of space between the fine stem receiving bin and the tobacco stem separating screen and between the middle stem receiving bin and the tobacco stem separating screen into two areas and guiding tobacco stems screened by the fine stem screening screen into the fine stem receiving bin, the second separation guide plate is used for separating at least part of space between the middle stem receiving bin and the tobacco stem separating screen and between the stem corner receiving bin and the tobacco stem separating screen into two areas and guiding the tobacco stems screened by the middle stem screening segment into the middle stem receiving bin;

the first separation guide plate and the second separation guide plate are rotatably connected with the supporting rod, and the separation guide plate fixing piece is used for fixing the positions of the first separation guide plate and the second separation guide plate on the supporting rod.

The tobacco stem sorting screen of the tobacco stem sorting device can realize the sorting of tobacco stems with different thicknesses on the basis of a single-layer screen, is high in sorting efficiency, and is not easy to clamp materials. Moreover, the tobacco stems gradually move from the fine stem screening section at the higher part of the screen surface to the stem turning screening section at the lower part of the screen surface along the screen holes, and the screening effect is good.

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 an embodiment of a tobacco stem screening device disclosed in the present disclosure.

Fig. 2 is a schematic structural diagram of a tobacco stem sorting screen of the tobacco stem sorting device according to the first embodiment of the disclosure.

Fig. 3 is a schematic structural diagram of a tobacco stem sorting screen in a second embodiment of the tobacco stem sorting screen device disclosed in the present disclosure.

Fig. 4 is a schematic structural diagram of a third tobacco stem sorting screen embodiment of the tobacco stem sorting device of the present disclosure.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a schematic structural diagram of a fourth tobacco stem sorting screen embodiment of the tobacco stem sorting device of the present disclosure.

Fig. 7 is a cross-sectional view of fig. 6.

The figures are labeled as follows:

the tobacco stem separating screen comprises a tobacco stem separating screen-1, a screen hole-11, a fine stem screen section-111, a middle stem screen section-112, a stem turning screen section-113, an anti-blocking section-114, a first blocking part-115, a second blocking part-116, a third blocking part-117, a fourth blocking part-118, a separating strip-119, a protrusion-12, a guide surface-120, a material receiving mechanism-2, a fine stem receiving bin-21, a middle stem receiving bin-22, a stem turning receiving bin-23, a flow guide assembly-24, a support rod-241, a first separating flow guide plate-242 and a second separating flow guide plate-243.

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 to 7, the tobacco stem screening device of the present disclosure includes a tobacco stem screening sieve 1, a vibration mechanism (not shown in the figures) and a material receiving mechanism 3. The vibrating mechanism may be a vibrating structure common in the screening arts, and the present disclosure is not further limited in this regard.

The screen surface of the tobacco stem separating screen 1 is provided with screen holes 11 extending along the length direction of the screen surface. The sieve hole 11 includes a fine stalk sieve section 111, a middle stalk sieve section 112, and a stalk turn sieve section 113 arranged in sequence (the straight line intersecting the sieve hole 1 in the figure is only used for distinguishing each sieve section). The widths of the fine stem screening section 111, the middle stem screening section 112 and the stem-turn screening section 113 are gradually increased along the length direction of the screening surface, and the connection positions among the fine stem screening section 111, the middle stem screening section 112 and the stem-turn screening section 113 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.

The screen surface has an angle with the horizontal plane, and the height of the fine stalk screen section 111 relative to the horizontal plane is greater than the height of the stalk screen section 113 relative to the horizontal plane. That is, the fine stalk screen section 111 is located at a higher position than the medium stalk screen section 112, and the medium stalk screen section 112 is located at a higher position than the stalk screen section 113. The tobacco stems move from the fine stem screening section 111 to the stem turning screening section 113 along the screen holes 11 under the action of the vibration mechanism and the self gravity, so that the distinguishing degree of the tobacco stems with different thicknesses is improved, and the screening effect is more effectively improved.

The included angle between the screen surface and the horizontal plane is not suitable to be too large so as to better control the moving speed of the tobacco stems on the tobacco stem sorting screen 1. In specific implementation, the included angle between the screen surface and the horizontal plane is preferably less than or equal to 15 degrees.

The vibration mechanism may be used to vibrate the tobacco stem sorting screen 1 so that the tobacco stems are sorted out of the screen apertures 11.

The receiving mechanism 2 comprises a receiving bin. The material receiving bin comprises a fine stalk receiving bin 21, a middle stalk receiving bin 22 and a stalk deflection receiving bin 23. The fine stem receiving bin 21, the middle stem receiving bin 22 and the stem turning receiving bin 23 are respectively arranged in one-to-one correspondence with the fine stem screening section 111, the middle stem screening section 112 and the stem turning screening section 113, so as to receive the tobacco stems of different thicknesses screened by the fine stem screening section 111, the middle stem screening section 112 and the stem turning screening section 113.

When the tobacco stem screening device is used, the vibration mechanism vibrates the tobacco stem screening sieve 1, and tobacco stems move from the fine stem screening section 111 of the sieve holes 11 to the stem turning screening section 113. The finer tobacco stems are screened out in the fine stem screening section 111 and enter the fine stem receiving bin 21. The moderately sized stems are screened out in the medium stem screening section 112 and enter the medium stem receiving bin 22, which can be used as suitable stems for shredding operations. The thick stalks are screened out in the stalk deflection screening section 113 and enter the stalk deflection receiving bin 23.

The tobacco stem sorting screen 1 of the tobacco stem sorting device can realize the sorting of tobacco stems with different thicknesses on the basis of a single-layer screen, is high in sorting efficiency and is not easy to clamp materials. Moreover, the tobacco stems gradually move from the fine stem screening section 111 at the higher part of the screen surface to the stem turning screening section 113 at the lower part of the screen surface along the screen holes 11, and the screening effect is good.

In one embodiment of the stem sorting screen of the stem screening device of the present disclosure, as shown in fig. 2, the screen surface is a rectangular screen surface. A first barrier 115 in the shape of an isosceles trapezoid is arranged between the adjacent stalk sieve sections 111. Between adjacent medium stalk screen sections 112 is a second barrier 116 in the shape of an isosceles trapezoid. A third barrier 117 shaped as an isosceles triangle is provided between the adjacent stalk break screening segments 113. The tobacco stem sorting screen 1 with the structure can obviously distinguish the adjacent screen holes 11, so that the tobacco stems can enter different screen holes 11 more uniformly.