Internal feeding type winnowing device

Abstract

The invention belongs to the technical field of tobacco equipment, and discloses an inner feeding type winnowing device which is used for winnowing cut stems and comprises a shell, a feeding pipe and a flow guide shuttle. Wherein an installation opening is formed in the shell, the feeding pipe is used for adding cut stems to be sorted into the shell, the feeding pipe penetrates through the installation opening to be installed on the shell, the feeding end of the feeding pipe is located outside the shell, and the discharging end of the feeding pipe is located inside the shell. The flow guide shuttle is arranged at the discharging end of the feeding pipe, the sectional area of the flow guide shuttle is gradually increased from the two ends to the middle, the flow guide shuttle sequentially comprises a flow guide section and a material distribution section in the vertical upward direction, the flow guide section is a revolving body with the generatrix being a convex curve, and the flow guide section is used for guiding airflow in the shell to flow along the surface of the flow guide shuttle. The material distributing section is a revolving body with the generatrix being a concave curve, and the material distributing section is used for dispersing the cut stems into air flow. According to the inner feeding type winnowing device, airflow turbulence can be eliminated, and meanwhile materials are prevented from being accumulated at the tail end of the feeding pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco equipment, and particularly relates to an internal feeding type air separator. BACKGROUND

[0002] The air separator is a special equipment for separating materials by using the inertia or gravity settling velocity difference of the materials under the wind force, and is widely applied in the tobacco, food, agricultural processing, chemical industry and mining industry. The cut stem air separator is applied to the cut stem air separation link in the tobacco processing process, is generally arranged between the cut stem drying and cut stem flavoring processes, utilizes the settling velocity difference of normal cut stems and unqualified cut stems in the wind force conveying to air separate the cut stems after drying, removes the unqualified cut stems such as cut stem, cut stem block, cut stem cluster and non-tobacco sundries with relatively large density, and improves the purity of the cut stems.

[0003] In the tobacco field, high-end tobacco (such as fine cigarette, cigar tobacco shred / cut stem) has a very high requirement on the physical form integrity of the material, and the crushing will directly affect the rolling filling value, combustion stability and sensory quality. For this purpose, the internal feeding type air separator is widely used as the cut stem air separator for high-end tobacco. The internal feeding type air separator is a kind of air separator which realizes the feeding of the material by deepening the feeding pipe into the internal part of the air separator, and the core design is that the feeding pipe directly extends to the internal part of the air separator, avoids the mechanical impact of the traditional throwing material feeding, and reduces the material crushing. However, the existing internal feeding type air separator still has the following technical problems:

[0004] 1. The speed of the cut stem entering the air separator and the flow rate of the internal airflow are difficult to be consistent, which causes the airflow to be unstable and disordered, and further affects the normal mixing of the cut stem and the airflow.

[0005] 2. When the feeding speed is too fast, a large amount of cut stem instantaneously flows into the air separator, and the airflow cannot uniformly hold and convey the cut stem, which causes the cut stem to accumulate at the end of the feeding pipe and reduces the air separation efficiency. SUMMARY

[0006] The purpose of the present application is to provide an internal feeding type air separator which can eliminate the airflow turbulence, improve the uniformity of the cut stem separation, and prevent the cut stem from accumulating at the end of the feeding pipe.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] An internal feeding type air separator for air separating cut stems, comprising:

[0009] a shell, wherein an installation opening is formed in the shell;

[0010] a feeding pipe for feeding the stem filaments to be sorted into the housing, the feeding pipe being mounted on the housing through the mounting opening, a feeding end of the feeding pipe being located outside the housing, and a discharging end of the feeding pipe being located inside the housing;

[0011] a flow guide shuttle, the flow guide shuttle being arranged at the discharging end of the feeding pipe, the flow guide shuttle gradually increasing in cross-sectional area from both ends to the middle, the flow guide shuttle including a flow guide section and a distribution section in sequence along the vertically upward direction, the flow guide section being a revolution body with an outer convex curve as a generatrix, the flow guide section being used for guiding the airflow in the housing to flow along the surface of the flow guide section, and the distribution section being a revolution body with an inner concave curve as a generatrix, the distribution section being used for dispersing the stem filaments into the airflow.

[0012] Optionally, the inner feeding type air separator further comprises a connecting assembly arranged between the feeding pipe and the flow guide shuttle, the connecting assembly being used for fixing the flow guide shuttle below the discharging end of the feeding pipe.

[0013] Optionally, the connecting assembly comprises a first hoop, a second hoop and a connecting piece, the first hoop being arranged at the discharging end of the feeding pipe, the second hoop being arranged on the flow guide shuttle, and the first hoop and the second hoop being fixedly connected through the connecting piece.

[0014] Optionally, the flow guide shuttle further comprises a connecting section between the flow guide section and the distribution section, and the second hoop is arranged on the connecting section.

[0015] Optionally, the connecting piece is arranged in three, and the three connecting pieces are uniformly distributed along the circumference of the flow guide shuttle.

[0016] Optionally, a fixing piece is arranged on the feeding pipe, the fixing piece being used for fixing the feeding pipe on the housing.

[0017] Optionally, the fixing piece is an elastic sheet, one end of the elastic sheet being fixedly connected with the feeding pipe, the other end of the elastic sheet extending away from the feeding pipe, and a barb being formed at the end of the elastic sheet, the barb being capable of being clamped on the end of the mounting opening.

[0018] Optionally, the housing comprises a first air separation chamber and a second air separation chamber, the first air separation chamber being located on the upper side of the second air separation chamber, and the discharging end of the feeding pipe and the flow guide shuttle being arranged in the first air separation chamber.

[0019] Optionally, the shell comprises an ellipsoidal shell at the upper part and a hemispherical shell at the lower part, one end of the ellipsoidal shell communicates with the top of the hemispherical shell, and a waist is formed at the connection of the ellipsoidal shell and the hemispherical shell, the first air separation chamber is above the waist, and the second air separation chamber is below the waist.

[0020] Optionally, the inner feeding air separator further comprises a make-up air funnel, and the bottom of the shell is further provided with a discharge opening, and the feeding opening of the make-up air funnel communicates with the discharge opening.

[0021] The present application has the following beneficial effects:

[0022] The inner feeding air separator provided by the present application is characterized in that a flow guide shuttle is arranged at the discharge end of the feeding pipe, and the flow guide shuttle comprises a flow guide section with an outward convex conical surface and a distribution section with an inward recessed conical surface in sequence along the vertical upward direction, wherein the flow guide section can guide the airflow flowing through the flow guide shuttle, avoid mutual interference and collision of the airflow at the discharge end of the feeding pipe, effectively eliminate the turbulence phenomenon of the airflow, and make the airflow more stable, thereby creating good airflow conditions for the separation of stem filaments. When the stem filaments falling from the discharge end of the feeding pipe pass through the distribution section of the flow guide shuttle, the flow direction and speed distribution of the stem filaments are changed by the inward recessed conical surface, so that the stem filaments are rapidly and uniformly dispersed into the airflow, thereby preventing the stem filaments from being accumulated or having a local high concentration at the discharge end of the feeding pipe, enabling the stem filaments to fully contact and mix with the airflow, and further improving the uniformity of stem filament separation and the air separation effect and quality. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a sectional view of the inner feeding air separator provided by the embodiment of the present application;

[0024] Figure 2 is a sectional view of the shell provided by the embodiment of the present application;

[0025] Figure 3 is a sectional view of the flow guide shuttle provided by the embodiment of the present application;

[0026] Figure 4 is a top view of the flow guide shuttle provided by the embodiment of the present application;

[0027] Figure 5 is Figure 1 is a local enlarged view of A in FIG. 8;

[0028] Figure 6 is a top view of the first hoop provided by the embodiment of the present application;

[0029] Figure 7 is a top view of the second hoop provided by the embodiment of the present application;

[0030] Figure 8 is a front view of a connecting piece provided by an embodiment of the present application;

[0031] Figure 9 is Figure 1 is a local enlarged view at B in the middle;

[0032] Figure 10 is a structural schematic view of a rack provided by an embodiment of the present application.

[0033] in the figure:

[0034] 1, housing; 11, mounting port; 12, winnowing outlet; 13, discharging port; 14, first winnowing chamber; 15, second winnowing chamber;

[0035] 2, feeding pipe;

[0036] 3, flow guide shuttle; 31, flow guide section; 32, connecting section; 33, material distribution section;

[0037] 4, connecting assembly; 41, first hoop; 411, first hoop piece; 4111, first butt joint ear; 412, first fastening bolt; 42, second hoop; 421, second hoop piece; 4211, second butt joint ear; 422, second fastening bolt; 43, connecting piece; 431, connecting ear;

[0038] 5, elastic piece; 51, barb;

[0039] 6, air supplementing funnel;

[0040] 7, rack; 71, first support piece; 72, second support piece; 73, support leg. DETAILED DESCRIPTION

[0041] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, not all the structures.

[0042] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] In the existing internal feeding type air separator, the cut stem directly enters the inside of the air separator from the discharge pipe, but the speed of the cut stem entering the air separator and the flow rate of the internal airflow are difficult to coordinate. If the feeding speed is too fast, a large amount of cut stem will rush into the air separator at a moment, and the airflow cannot uniformly lift and transport the cut stem, which will cause part of the cut stem to accumulate together, not only affecting the air separation efficiency, but also causing the airflow in the local area to be blocked by the cut stem and to be turbulent. On the contrary, if the feeding speed is too slow, the airflow near the feeding port may form a negative pressure area, which will also cause the airflow to be unstable and turbulent, affecting the normal mixing of the cut stem and the airflow. To solve the problems existing in the existing internal feeding type air separator, the present embodiment provides the following specific solutions.

[0046] As shown in Figures 1 to 3 The present embodiment provides an internal feeding type air separator for air separation of cut stem, which comprises a shell 1, a feeding pipe 2 and a flow guide shuttle 3. The shell 1 is provided with a mounting port 11, the feeding pipe 2 is used to add the cut stem to be separated into the shell 1, the feeding pipe 2 is mounted on the shell 1 through the mounting port 11, the feeding end of the feeding pipe 2 is located outside the shell 1, and the discharge end of the feeding pipe 2 is located inside the shell 1. The flow guide shuttle 3 is arranged at the discharge end of the feeding pipe 2, the cross-sectional area of the flow guide shuttle 3 gradually increases from both ends to the middle, the flow guide shuttle 3 includes a flow guide section 31 and a distribution section 33 in sequence along the vertical upward direction, the flow guide section 31 is a revolution body with an outer convex curve as a generatrix, the flow guide section 31 is used to guide the airflow in the shell 1 to flow along the surface of the flow guide shuttle 3, and the distribution section 33 is a revolution body with an inner concave curve as a generatrix, the distribution section 33 is used to disperse the cut stem into the airflow.

[0047] Specifically, the guide section 31 is a rotating structure formed by rotating a curve that gradually convexes outward along an upward inclined direction, with the vertical line at its starting point as the axis of rotation, and the surface of the rotating body formed by the convex curve is an outwardly convex conical surface. The material distribution section 33 is a rotating structure formed by rotating a curve that gradually concaves inward along a downward inclined direction, with the vertical line at its starting point as the axis of rotation, and the surface of the rotating body formed by the concave curve is a concave conical surface. The starting points of the convex and concave curves are located on the same vertical line, and their ending points are joined together.

[0048] By providing a guide shuttle 3 at the outlet end of the feed pipe 2, and in the vertically upward direction, the guide shuttle 3 sequentially includes a guide section 31 with an outwardly convex conical surface and a material distribution section 33 with an inwardly concave conical surface. The inwardly concave conical surface of the material distribution section 33 can guide and comb the airflow blown out of the feed pipe 2, causing it to flow along the inwardly concave conical surface. The outwardly convex conical surface of the guide section 31 can guide and comb the rising airflow inside the shell 1, causing it to flow along the outwardly convex conical surface. This avoids mutual interference and collision of airflow at the outlet end of the feed pipe 2, effectively eliminating the turbulence of airflow, making the airflow more stable, and creating good airflow conditions for the separation of the strands. Meanwhile, when the stems falling from the discharge end of the feed pipe 2 pass through the distribution section 33 of the guide shuttle 3, the flow direction and velocity distribution of the stems are changed by the concave conical surface, so that the stems are quickly and evenly dispersed into the airflow. This prevents the stems from accumulating at the discharge end of the feed pipe 2 or from having excessively high local concentrations, allowing the stems to fully contact and mix with the airflow, thereby improving the uniformity of stem separation and enhancing the air classification effect and quality.

[0049] like Figure 1 and Figure 2 As shown, the cross-sectional shape of the shell 1 is roughly fish-shaped. The shell 1 includes an upper ellipsoidal shell and a lower hemispherical shell. One end of the ellipsoidal shell is connected to the top of the hemispherical shell, and a narrow waist is formed at the connection between the two. A first air-classifying chamber 14 is formed above the narrow waist, and a second air-classifying chamber 15 is formed below the narrow waist. The discharge end of the feed pipe 2 and the guide shuttle 3 are both located in the first air-classifying chamber 14. By setting the shell 1 to a streamlined structure, the breakage of the stems when they come into contact with the shell 1 can be reduced. At the same time, the design of the first air-classifying chamber 14 and the second air-classifying chamber 15 creates different wind speed distributions in different air-classifying chambers, performing two-stage air-classification of the stems, increasing the accuracy of air-classification, and effectively separating stems with higher purity.

[0050] It is understood that in some other embodiments, the housing 1 can be designed with other structures according to actual needs, as long as it has a multi-stage air separation chamber, and there are no restrictions here.

[0051] As shown in Figure 2 The top of the shell 1 is provided with a winnowing outlet 12, which is in communication with an external air extractor. The air extractor forms a negative pressure in the shell 1 through the winnowing outlet 12, thereby winnowing the cut stem in the shell 1, and the qualified cut stem after winnowing enters the next section through the winnowing outlet 12. The installation opening 11 is close to the winnowing outlet 12 and is located on the lower side of the winnowing outlet 12. The feeding pipe 2 passes through the installation opening 11 and is installed on the shell 1. The bottom of the shell 1 is provided with a discharge opening 13, and the unqualified cut stem after winnowing is discharged from the discharge opening 13.

[0052] Optionally, the shell 1 in the embodiment is a structural member made of transparent material, such as transparent nylon, PC, etc. By using a transparent shell 1, the separation state, winnowing effect and impurity discharge during the winnowing process can be observed in real time, which helps to adjust the equipment parameters in time to optimize the separation efficiency.

[0053] As shown in Figure 1 The feeding pipe 2 is generally a bent pipe structure with a diameter gradually decreasing from the feeding end to the discharging end. The bent shape facilitates the feeding pipe 2 to pass through the installation opening 11. After the feeding pipe 2 is installed on the shell 1, the feeding end of the feeding pipe 2 is inclined upward while the discharging end of the feeding pipe 2 is vertically downward, thereby facilitating feeding and discharging. Further, as shown in Figure 1 The opening diameter of the installation opening 11 is greater than the diameter of the feeding end of the feeding pipe 2, thereby facilitating the feeding pipe 2 to pass through the installation opening 11. The cut stem to be winnowed enters from the feeding end of the feeding pipe 2. The feeding end of the feeding pipe 2 is also opposite to the blowing port of the external air blower, thereby blowing the cut stem in the feeding pipe 2 out of the discharging end of the feeding pipe 2 and into the shell 1 for winnowing.

[0054] Further, the feeding pipe 2 is provided with a fixing member for fixing the feeding pipe 2 on the shell 1. Optionally, as shown in Figure 1 and Figure 9 The fixing member in the embodiment is an elastic sheet 5. One end of the elastic sheet 5 is fixedly connected with the feeding pipe 2, and the other end extends away from the feeding pipe 2 and forms a barb 51 at the end. The barb 51 can be clamped at the end of the installation opening 11. The distance between the end of the elastic sheet 5 not connected with the feeding pipe 2 and the feeding pipe 2 is a, and the sum of a and the diameter of the feeding end of the feeding pipe 2 is greater than the opening diameter of the installation opening 11, thereby ensuring that the elastic sheet 5 is pressed at the installation opening 11 and clamps the feeding pipe 2 at the installation opening 11.

[0055] When the feeding pipe 2 is installed on the shell 1, it is only needed to press the feeding pipe 2, and when the barb 51 is clamped at the end of the installation port 11, the feeding pipe 2 is clamped on the shell 1. When it is needed to remove the feeding pipe 2 from the shell 1, it is only needed to push the barb 51 to deform the elastic sheet 5 towards the feeding pipe 2, and then the feeding pipe 2 is taken out from the installation port 11. The structure of the elastic sheet 5 is simple, low in cost, and convenient for dismounting and mounting the feeding pipe 2.

[0056] It can be understood that in some other embodiments, other forms of fixing members can also be arranged on the feeding pipe 2, such as caps or elastic rings which are adapted to the installation port 11 and arranged on the sidewall of the feeding pipe 2, as long as the feeding pipe 2 can be fixed on the shell 1, which is not limited herein.

[0057] As shown in Figure 3 and Figure 4 , the flow guide shuttle 3 is roughly in a spindle structure, that is, the cross-sectional area of the flow guide shuttle 3 gradually increases from the two ends to the middle part, and the flow guide shuttle 3 comprises a conical surface flow guide section 31 with an outward convex shape and a conical surface distribution section 33 with an inward recessed shape, and the conical surface flow guide section 31 and the conical surface distribution section 33 are smoothly connected. The flow guide shuttle 3 is arranged directly below the discharge end of the feeding pipe 2, and the cut tobacco strands blown out from the discharge end of the feeding pipe 2 will directly fall on the conical surface of the distribution section 33, and then the flow direction and speed distribution of the cut tobacco strands are changed through the inward recessed conical surface, so that the cut tobacco strands are rapidly and uniformly dispersed into the airflow, thereby preventing the cut tobacco strands from being accumulated or having a local high concentration at the discharge end of the feeding pipe 2, and enabling the cut tobacco strands to be fully contacted and mixed with the airflow, thereby improving the uniformity of the cut tobacco strand separation and improving the winnowing effect and quality. At the same time, the inward recessed conical surface of the distribution section 33 can guide the airflow blown out from the feeding pipe 2 to flow along the inward recessed conical surface, and the outward convex conical surface of the flow guide section 31 can guide the upward airflow in the shell 1 to flow along the outward convex conical surface, thereby avoiding the mutual interference and collision of the airflow at the discharge end of the feeding pipe 2, effectively eliminating the turbulence phenomenon of the airflow, and making the airflow more stable, thereby creating good airflow conditions for the separation of the cut tobacco strands.

[0058] It should be noted that the curved surface structures of the flow guide section 31 and the distribution section 33 in the embodiment are obtained through CFD (Computational Fluid Dynamics) simulation optimization, which can maximize the reduction of the airflow resistance and the optimization of the airflow distribution while ensuring the structural strength of the flow guide shuttle 3. The CFD (Computational Fluid Dynamics) is a prior art, which will not be described herein.

[0059] As shown in Figure 1 and Figure 5 , the inner feeding type winnower further comprises a connecting assembly 4, which is arranged between the feeding pipe 2 and the flow guide shuttle 3, and is used for fixing the flow guide shuttle 3 below the discharge end of the feeding pipe 2.

[0060] Optionally, as shown inFigure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the connecting assembly 4 includes a first clamp 41, a second clamp 42, and a connector 43. The first clamp 41 is disposed at the outlet end of the feed pipe 2, and the second clamp 42 is disposed on the guide shuttle 3. The first clamp 41 and the second clamp 42 are fixedly connected by the connector 43. Optionally, in this embodiment, the connector 43 is generally a strip-shaped sheet structure, and connecting ears 431 are formed at both ends of the connector 43. One connecting ear 431 can be fixedly connected to the first clamp 41, and the other connecting ear 431 can be fixedly connected to the second clamp 42. During installation, the first clamp 41 is fitted onto the outlet end of the feed pipe 2, and the second clamp 42 is fitted onto the guide shuttle 3. Then, the first clamp 41 and the second clamp 42 are locked to fix the guide shuttle 3 below the outlet end of the feed pipe 2. This connecting assembly 4 has a simple structure, reliable connection, and facilitates the assembly and disassembly of the guide shuttle 3.

[0061] It is understood that in some other embodiments, the feed pipe 2 and the guide shuttle 3 can also be connected by other connecting components 4, such as fixing a clamp at each end of the connector 43, with one clamp holding the feed pipe 2 and the other clamp holding the guide shuttle 3, which can also fix the guide shuttle 3 below the discharge end of the feed pipe 2, and no limitation is made here.

[0062] Further optional, such as Figure 5 , Figure 6 , Figure 7 As shown, in this embodiment, three connectors 43 are provided. The three connectors 43 are evenly distributed along the circumference of the guide shuttle 3. This arrangement can ensure that the position of the guide shuttle 3 is more stable, and prevent the guide shuttle 3 from vibrating when the internal feed air separator is impacted by external force or when the guide shuttle 3 is impacted by strong airflow, thereby affecting the air separation effect.

[0063] Specifically, such as Figure 6 As shown, the first clamp 41 includes three first clamp plates 411. Each first clamp plate 411 is approximately an arc-shaped sheet structure, and both ends of the first clamp plate 411 are bent outwards to form two first mating ears 4111. The three first clamp plates 411 are arranged in a circular pattern, and any two adjacent first clamp plates 4111 are fixedly connected by a first fastening bolt 412. Figure 7As shown, the second hoop 42 comprises three second hoop pieces 421, the second hoop pieces 421 are substantially arc-shaped piece structures, and two ends of the second hoop pieces 421 are bent towards the arc-shaped outer portion to form two second butt ears 4211, the three second hoop pieces 421 are arranged in a circular shape, and any two adjacent second hoop pieces 421 are fixedly connected by a second fastening bolt 422 between the two second butt ears 4211 adjacent to each other. The three connection positions on the first hoop 41 are opposite to the three connection positions on the second hoop 42 in the up-down direction, and a connecting piece 43 is arranged between each pair of opposite connection positions.

[0064] It can be understood that in some other embodiments, the number of connecting pieces 43 can also be set according to actual needs, which is not limited herein. It can also be understood that when the number of connecting pieces 43 changes, the shapes and numbers of the first hoop pieces 411 and the second hoop pieces 421 can also be adaptively changed, for example, when only two connecting pieces 43 are needed, the first hoop 41 comprises two semicircular first hoop pieces 411, and the second hoop 42 comprises two semicircular second hoop pieces 421, which is not limited herein.

[0065] Further, as shown in Figure 3 and Figure 5 In the embodiment, the guide shuttle 3 further comprises a connecting section 32, the connecting section 32 is located between the guide section 31 and the material distribution section 33, and the second hoop 42 is arranged on the connecting section 32. Specifically, the connecting section 32 is in a cylindrical structure, the two ends of the connecting section 32 are smoothly connected with the guide section 31 and the material distribution section 33 respectively, and the height of the connecting section 32 is not less than the width of the second hoop 42. By arranging the connecting section 32, the second hoop 42 can be fixed on the guide shuttle 3 more conveniently.

[0066] As shown in Figure 1 The inner feeding type air separator further comprises a supplementary air funnel 6, the feeding end of the supplementary air funnel 6 is in communication with the discharging port 13 on the shell 1, and the discharging end of the supplementary air funnel 6 is opposite to the air blowing port of an external air blower, so that the airflow passes through the supplementary air funnel 6 to supply air to the second air selection chamber 15 and to perform secondary air selection on the cut stem falling into the second air selection chamber 15. By performing air selection twice, the air selection precision can be improved, and the qualified cut stem that is not separated out during the first air selection can be avoided to be removed by mistake, so that the effective utilization rate of the cut stem can be improved, the waste can be reduced, and the production cost can be reduced.

[0067] As shown in Figure 1 and Figure 10As shown, the inner feeding type air separator further comprises a rack 7, and the shell 1 and the air supplementing hopper 6 are arranged on the rack 7. Specifically, the rack 7 comprises a first support 71, a second support 72 and a support leg 73, and the first support 71 and the second support 72 are sequentially fixed on the support leg 73 along the height direction. The first support 71 is in a circular ring structure, and the inner ring size of the first support 71 is adapted to the size of the ellipsoidal shell at the upper part of the shell 1, so that the ellipsoidal shell can be limited on the first support 71. The second support 72 is also in a circular ring structure, and the inner ring size of the second support 72 is adapted to the size of the feeding end of the air supplementing hopper 6, so that the feeding end of the air supplementing hopper 6 can be limited on the second support 72. By supporting the shell 1 and the air supplementing hopper 6 through the rack 7, the stability of the air selection process can be improved, and when the inner feeding type air separator needs to be carried, the inner feeding type air separator is also convenient for the operator to carry.

[0068] The working process of the inner feeding type air separator provided in the embodiment is as follows:

[0069] The air extractor is started, and the air extractor forms a negative pressure in the shell 1 through the air selection outlet 12; the cut stem is blown into the shell 1 through the feeding pipe 2 and enters the narrow waist of the shell 1; most of the cut stem entering the shell 1 will first enter the first air selection chamber 14, and the qualified cut stem is discharged from the air selection outlet 12 into the next process after air selection, such as a flavoring process; part of the heavier cut stem enters the second air selection chamber 15 and continues to be air selected in the second air selection chamber 15; at the same time, a small part of the cut stem entering the narrow waist of the shell 1 will directly enter the second air selection chamber 15, and the air supplementing hopper 6 is used to supplement air to the second air selection chamber 15, and this part of the cut stem is also air selected in the second air selection chamber 15, and the qualified cut stem is discharged from the air selection outlet 12 into the next process after air selection; the heavier unqualified cut stem, such as stem, stem block and wet mass cut stem, is discharged through the air supplementing hopper 6 for further processing; and finally, the air selection of the cut stem is completed.

[0070] The inner feeding type air separator provided by the embodiment comprises a feeding pipe 2, a housing 1, a guide shuttle 3 and an air fan 4. The guide shuttle 3 is arranged at the discharging end of the feeding pipe 2, and the guide shuttle 3 comprises a guide section 31 with an outward convex conical surface and a distribution section 33 with an inward recessed conical surface in the vertical upward direction. The inward recessed conical surface of the distribution section 33 can guide the airflow blown out by the feeding pipe 2 to comb, so that the airflow flows along the inward recessed conical surface. The outward convex conical surface of the guide section 31 can guide the upward airflow in the housing 1 to comb, so that the airflow flows along the outward convex conical surface. Thus, the airflow interference and collision at the discharging end of the feeding pipe 2 are avoided, the turbulence phenomenon of the airflow is effectively eliminated, the airflow is more stable, and the good airflow condition for the separation of the cut stem is created. Meanwhile, when the cut stem falling from the discharging end of the feeding pipe 2 passes through the distribution section 33 of the guide shuttle 3, the cut stem is changed in the flow direction and the speed distribution by the inward recessed conical surface, so that the cut stem is rapidly and uniformly dispersed into the airflow. Thus, the cut stem is prevented from being accumulated or appearing in the local high concentration condition at the discharging end of the feeding pipe 2, the cut stem can be fully contacted and mixed with the airflow, the uniformity of the cut stem separation is improved, and the air separation effect and quality are improved.

[0071] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, all the implementation modes do not need to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An internally fed air separator for air separating stems, characterized in that, include: The housing (1) has an installation port (11). Feed pipe (2) is used to add the filaments to be sorted into the housing (1). The feed pipe (2) passes through the mounting port (11) and is installed on the housing (1). The feed end of the feed pipe (2) is located outside the housing (1), and the discharge end of the feed pipe (2) is located inside the housing (1). The guide shuttle (3) is located at the discharge end of the feed pipe (2). From both ends to the middle, the cross-sectional area of ​​the guide shuttle (3) gradually increases. In the vertical upward direction, the guide shuttle (3) includes a guide section (31) and a distribution section (33). The guide section (31) is a rotating body with an outwardly convex curve as its generatrix. The guide section (31) is used to guide the airflow in the housing (1) to flow along the surface of the guide shuttle (3). The distribution section (33) is a rotating body with an inwardly concave curve as its generatrix. The distribution section (33) is used to disperse the strands into the airflow.

2. The internally fed air separator according to claim 1, characterized in that, The internally fed air separator also includes a connecting component (4), which is disposed between the feed pipe (2) and the guide shuttle (3). The connecting component (4) is used to fix the guide shuttle (3) below the discharge end of the feed pipe (2).

3. The internally fed air separator according to claim 2, characterized in that, The connecting component (4) includes a first clamp (41), a second clamp (42) and a connector (43). The first clamp (41) is disposed at the discharge end of the feed pipe (2), and the second clamp (42) is disposed on the guide shuttle (3). The first clamp (41) and the second clamp (42) are fixedly connected by the connector (43).

4. The internally fed air separator according to claim 3, characterized in that, The guide shuttle (3) also includes a connecting section (32), which is located between the guide section (31) and the material distribution section (33), and the second clamp (42) is disposed on the connecting section (32).

5. The internally fed air separator according to claim 3, characterized in that, There are three connectors (43), and the three connectors (43) are evenly distributed along the circumference of the guide shuttle (3).

6. The internally fed air separator according to any one of claims 1-4, characterized in that, A fixing member is provided on the feed pipe (2), which is used to fix the feed pipe (2) on the housing (1).

7. The internally fed air separator according to claim 6, characterized in that, The fastener is an elastic sheet (5), one end of which is fixedly connected to the feed pipe (2), and the other end extends away from the feed pipe (2), and a barb (51) is formed at the end, which can be engaged with the end of the mounting port (11).

8. The internally fed air separator according to any one of claims 1-4, characterized in that, The housing (1) includes a first air separation chamber (14) and a second air separation chamber (15). The first air separation chamber (14) is located above the second air separation chamber (15). The discharge end of the feed pipe (2) and the guide shuttle (3) are both located in the first air separation chamber (14).

9. The internally fed air separator according to claim 8, characterized in that, The housing (1) includes an ellipsoidal shell at the top and a hemispherical shell at the bottom. One end of the ellipsoidal shell is connected to the top of the hemispherical shell, and a narrow waist is formed at the connection between the ellipsoidal shell and the hemispherical shell. The first air separation chamber (14) is above the narrow waist, and the second air separation chamber (15) is below the narrow waist.

10. The internally fed air separator according to any one of claims 1-4, characterized in that, The internally fed air separator also includes an air replenishment funnel (6), and the bottom of the housing (1) is provided with a discharge port (13), and the inlet of the air replenishment funnel (6) is connected to the discharge port (13).

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