Novel tobacco shred returning vibration groove for separating broken tobacco shreds

Abstract

The utility model discloses a novel tobacco shred returning vibration groove for separating broken tobacco shreds, which comprises a vibration groove body, the vibration groove body is provided with a feeding end and a discharging end, and the bottom end face of the vibration groove body is sequentially provided with a mounting positioning hole I, a rectangular blanking screen plate with the same width as the vibration groove body, a tobacco shred blanking port and a mounting positioning hole II from right to left. A separating screen plate connected with the side wall face of the vibration groove body is arranged above the rectangular discharging screen plate, a working window capable of being opened and closed in an overturning mode is formed in the surface of the separating screen plate, and a guide shell connected with the side wall face of the vibration groove body in a fastened mode is arranged below the rectangular discharging screen plate. Through the double-layer structure of the separating screen plate and the rectangular blanking screen plate, tobacco shreds meeting the process requirements and broken tobacco shreds not meeting the process requirements can be effectively separated.

Description

Technical Field

[0001] This utility model relates to the technical field of cigarette production equipment, and in particular to a novel rewind trough for separating and crushing tobacco shreds. Background Technology

[0002] The ZJ17 cigarette making unit can be divided into three components: a feeding and forming machine, a cigarette forming machine, and a filter tip attaching machine. The feeding and forming machine processes the tobacco shreds into a uniform and continuous bundle with a certain filling density through a series of production processes. Before being sent to the cigarette forming machine, the continuous tobacco shreds need to be trimmed into tobacco strips that meet the process quality requirements by a leveling device. The tobacco shreds trimmed by the leveling device are then sent back to the tobacco storage area through the tobacco return system of the feeding and forming machine to await reuse.

[0003] The tobacco return system of the YJ17 feeding and forming machine mainly consists of a main return device, a secondary return device, and a return vibration trough. The discharge end of the secondary return device is located above the feed end of the main return device, and the discharge end of the main return device is located above the feed end of the return vibration trough. The main and secondary return conveyor belts transport the trimmed tobacco to the return vibration trough, which is connected to the storage area. The return vibration trough, through periodic vibration, transports a certain proportion of the trimmed tobacco back to the storage area after the feeding and forming machine. Excessive tobacco trimming by the feeding and forming machine can damage the tobacco structure (proportion of long, short, and broken strands), a phenomenon commonly known as tobacco breakage. Tobacco breakage is unavoidable during the mechanical conveying process of the YJ17 feeding and forming machine, and it can lead to quality problems such as uneven tobacco filling, increased weight deviation, and a higher rate of empty tobacco strands.

[0004] Therefore, it is necessary to study a device that can effectively separate tobacco shreds that meet the process requirements from broken tobacco shreds that do not meet the process requirements during the tobacco shred conveying process in the tobacco shred return system. This device can reduce the amount of broken tobacco shreds filling the cigarette, reduce the occurrence of empty cigarettes and cigarette dust, so as to maximize the whole tobacco shred rate in the tobacco bundle and maintain the optimal state, thereby meeting the product process technology requirements. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a novel recycle vibrating trough for separating broken tobacco shreds. This trough can solve the technical problem that if broken tobacco shreds that do not meet the process requirements cannot be effectively separated during the recycle process, it will lead to uneven tobacco filling, increased weight deviation, and increased empty head rate. This utility model can transport tobacco shreds that meet the process requirements to the storage area for recycle and reuse, and separate out broken tobacco shreds that do not meet the process requirements.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A novel rewinding trough for separating shredded tobacco includes a trough body with an inlet and an outlet. From right to left, the bottom surface of the trough body is provided with a mounting positioning hole I, a rectangular feeding screen of equal width to the trough body, a tobacco feeding opening, and a mounting positioning hole II. Above the rectangular feeding screen is a separation screen connected to the side wall of the trough body. The surface of the separation screen has a working window that can be flipped open and closed. Below the rectangular feeding screen is a guide housing that is securely connected to the side wall of the trough body.

[0008] As an improvement to the above technical solution, the mounting positioning hole I and mounting positioning hole II, through their cooperation with the positioning screws, can install the vibrating groove body in a predetermined position in the entire wire return system. The mounting positioning hole I is located at the feed end of the vibrating groove body, and the mounting positioning hole II is located at the discharge end of the vibrating groove body.

[0009] As an improvement to the above technical solution, the surface of the rectangular blanking screen is provided with a number of rectangular mesh holes arranged in a staggered manner.

[0010] As an improvement to the above technical solution, the separating screen plate extends from the top of the rectangular feeding screen plate to the side wall of the feeding end of the vibrating trough body, and the surface of the separating screen plate is uniformly opened with a number of separating screen holes in a staggered arrangement.

[0011] As an improvement to the above technical solution, the separation mesh openings on the surface of the separation mesh plate are larger than the rectangular mesh openings on the surface of the rectangular blanking mesh plate.

[0012] As an improvement to the above technical solution, the working window is opened on the surface of the separation mesh plate directly opposite the location of the mounting positioning hole I.

[0013] As an improvement to the above technical solution, the guide housing is provided with a guide inlet end and a guide outlet end located below it. The guide inlet end is provided with a positioning sidewall, and a side wing is also provided at the edge of the guide inlet end on the side of the positioning sidewall. The positioning sidewall of the guide housing is fastened to the side wall of the vibrating trough body by the cooperation of screws and nuts. The guide outlet end of the guide housing faces the direction of the feed end of the vibrating trough body. The opening size of the guide outlet end is smaller than the opening size of the guide inlet end, and the guide outlet end is offset to the side by a distance relative to the guide inlet end.

[0014] Compared with the prior art, the technical solution described in this utility model has the following beneficial effects:

[0015] This invention features a reasonable structural design, low cost, and strong practicality. Through a double-layer structure consisting of a separation mesh plate and a rectangular feeding mesh plate, it effectively separates compliant tobacco shreds from non-compliant broken tobacco shreds. The compliant shreds are transported to the storage area for reuse, while the non-compliant broken tobacco shreds are separated by the separation mesh plate and discharged into the suction box via the rectangular feeding mesh plate. This not only ensures the amount of compliant tobacco shreds in the cigarette but also reduces the amount of broken tobacco shreds. Furthermore, it reduces the occurrence of empty cigarettes and tobacco residue, further minimizing uneven filling, increased weight deviation, and higher empty head rates. Ultimately, it maximizes the proportion of whole tobacco shreds in the tobacco bundle, thus meeting the product's technological requirements.

[0016] Other beneficial effects of this invention will be further explained in the following specific embodiments. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the separation mesh plate of this utility model arranged in the vibrating groove body;

[0019] Figure 2 This is a schematic diagram of the bottom end face of the vibrating groove body of this utility model;

[0020] Figure 3 This is a large-scale view of the rectangular mesh openings of the rectangular blanking screen plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the working window of this utility model when it is in operation and closed.

[0022] Figure 5 This is a schematic diagram of the structure of the work window flipping up in the maintenance state of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall assembly structure of this utility model;

[0024] Figure 7 The attached figure shows the material inside the vibrating trough body and the force analysis diagram of the vibrating trough body.

[0025] The components are: 1. Vibrating trough body; 2. Mounting positioning hole I; 3. Rectangular feeding screen plate; 4. Rectangular mesh; 5. Wire feeding port; 6. Mounting positioning hole II; 7. Separation screen plate; 8. Working window; 9. Guide shell. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "above", "below", "front", "back", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "setting," "installing," "connecting," "linking," "fixing," and "communicating" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figures 1 to 6 The present invention provides a novel rewinding groove for separating and crushing tobacco shreds.

[0030] It includes a vibrating trough body 1, which is provided with a feeding end and a discharging end. The bottom end face of the vibrating trough body 1 is provided with a mounting positioning hole I2, a rectangular material dropping screen plate 3 of the same width as the vibrating trough body 1, a wire dropping outlet 5, and a mounting positioning hole II6 arranged sequentially from right to left. A separation screen plate 7 connected to the side wall of the vibrating trough body 1 is provided above the rectangular material dropping screen plate 3. A working window 8 that can be flipped open and closed is opened on the surface of the separation screen plate 7. A guide shell 9 that is fastened to the side wall of the vibrating trough body 1 is provided below the rectangular material dropping screen plate 3.

[0031] In the embodiments described in this utility model, the mounting positioning holes I2 and II6, through their cooperation with the positioning screws, enable the vibrating trough body 1 to be installed in a predetermined position within the entire tobacco return system. The mounting positioning hole I2 is located at the feed end of the vibrating trough body 1, and the mounting positioning hole II6 is located at the discharge end of the vibrating trough body 1. The tobacco discharge port 5 serves to discharge the tobacco shreds that meet the process requirements, separated by the separating mesh plate 7, to the tobacco storage area.

[0032] Specifically, the length of the vibrating groove body 1 is 1150mm, its wall thickness is 2mm, and the width of its outer wall surface is 118mm.

[0033] In the embodiments described in this utility model, the surface of the rectangular feeding screen 3 is provided with a plurality of rectangular mesh holes 4 arranged in a staggered manner. The rectangular feeding screen 3 can completely discharge the shredded tobacco that does not meet the process requirements separated by the separating screen 7 through the rectangular mesh holes 4 and guide it into the suction box through the guide shell 9.

[0034] Specifically, the rectangular discharge screen 3 is located 280mm away from the side wall of the feed end of the vibrating trough body 1, and the size of the rectangular discharge screen 3 is 114mm*70mm.

[0035] In the embodiment of this utility model, the separating screen plate 7 extends from above the rectangular feeding screen plate 3 to the side wall of the feeding end of the vibrating trough body 1. The surface of the separating screen plate 7 is uniformly opened with a plurality of separating mesh holes in a staggered arrangement. The mesh size of the separating mesh holes is 15 mesh, and the diameter of the separating mesh holes is 2.5 mm. The diameter of the separating mesh holes can meet the requirements for separating the broken tobacco shreds in the returning tobacco under the motion state. Under the periodic vibration provided by the external vibration mechanism, the separating screen plate 7 can screen the broken tobacco shreds in the returning tobacco falling on the surface of the separating screen plate 7 through the separating mesh holes to the bottom end face of the vibrating trough body 1.

[0036] Specifically, the separation screen plate 7 has a length of 400mm and a thickness of 2mm. In order to meet the requirement that the shredded tobacco can be vibrated and conveyed normally, the distance from the lower surface of the separation screen plate 7 to the bottom end of the vibrating trough body 1 is set to 8mm. This allows the shredded tobacco screened by the separation screen plate 7 to be smoothly vibrated and conveyed to the rectangular discharge screen plate 3 within the area enclosed by the lower surface of the separation screen plate 7 and the bottom end of the vibrating trough body 1, thus avoiding blockage when the shredded tobacco is vibrated and conveyed in this area.

[0037] In the embodiments described in this utility model, the separation mesh holes on the surface of the separation mesh plate 7 are larger than the rectangular mesh holes 4 on the surface of the rectangular feeding mesh plate 3, so as to ensure that all the broken tobacco shreds that do not meet the process requirements in the return shreds falling into the vibrating trough body 1 can be separated by the separation mesh plate 7.

[0038] By setting up a double-layer structure with a separating mesh plate 7 and a rectangular feeding mesh plate 4, the tobacco shreds that meet the process requirements and the broken tobacco shreds that do not meet the process requirements can be effectively separated. The tobacco shreds that meet the process requirements are transported to the tobacco storage area to wait for recycling, while the broken tobacco shreds that do not meet the process requirements are separated by the separating mesh plate 7 and discharged into the dust collection box through the rectangular feeding mesh plate 3. This not only ensures the filling amount of tobacco shreds that meet the process requirements in the cigarette but also reduces the filling amount of broken tobacco shreds in the cigarette. At the same time, it also reduces the occurrence of empty cigarettes and dust in the cigarette, and further reduces the occurrence of uneven filling, increased weight deviation, and increased empty head rate of cigarettes. It achieves the maximum optimal state of whole tobacco shreds filled into the tobacco bundle, thereby meeting the product process technology requirements.

[0039] In the embodiments described in this utility model, the working window 8 is opened on the surface of the separating mesh plate 7 directly opposite the mounting positioning hole I2. In the maintenance state, the working window 8 is flipped up and the positioning screw at the mounting positioning hole I2 on the bottom end face of the vibrating groove body 1 is rotated to facilitate the disassembly or installation of the vibrating groove body 1 from the tobacco return system. In the working state, the working window 8 is closed so that the upper surface of the working window 8 is flush with the upper surface of the separating mesh plate 7, so that the tobacco can maintain normal vibration and conveying after falling into the vibrating groove body 1 during the tobacco return process.

[0040] In the embodiments described in this utility model, the guide housing 9 has the function of receiving the shredded tobacco falling from the rectangular mesh 4 of the rectangular feed screen 3 and guiding it into the suction box through the opening at its bottom. The guide housing 9 is provided with a guide inlet end and a guide outlet end located below it. The guide inlet end is provided with a positioning sidewall, and a side wing is also provided at the edge of the guide inlet end of the positioning sidewall. The positioning sidewall of the guide housing 9 is fastened to the side wall of the vibrating trough body 1 by the cooperation of screws and nuts, thereby further fixing the guide housing 9 to the lower part of the rectangular feed screen 3 of the vibrating trough body 1. At this time, the side wing located at the guide inlet end is in close contact with the vibrating trough. The lower surface of the main body 1; the guide outlet end of the guide housing 9 faces the feed end of the vibrating trough main body 1. The opening size of the guide outlet end is smaller than the opening size of the guide inlet end, and the guide outlet end is offset to the side relative to the guide inlet end by a certain distance, so that one of the connecting surfaces between the guide inlet end and the guide outlet end is a vertical plane, and the other connecting surfaces are inclined planes. This arrangement of the connecting surfaces between the guide inlet end and the guide outlet end is intended to avoid the support frame that provides support for the vibrating trough main body 1 to prevent collision with it during vibration conveying, and also to change the discharge position of the crushed tobacco.

[0041] Specifically, the screws and nuts fastened to the bottom of the vibrating groove body 1 are two matching screws and nuts of type M6; the guide housing 9 is made of stainless steel with a wall thickness of 1mm, the length of its guide inlet end is 128mm, the width of its guide inlet end is 104mm, the width of its guide outlet end is 31mm, the inclination angle of one of the inclined planes between the guide inlet end and the guide outlet end is 52°, and the center line position of the guide outlet end is offset to the side by 50mm relative to the center line position of the guide inlet end.

[0042] This utility model also includes determining the motion parameters of the vibrating groove body 1, and determining whether the motion state of the vibrating groove body 1 meets the working requirements through force analysis of the tobacco, specifically including:

[0043] 1. Determination of vibration parameters:

[0044] (1)Amplitude A

[0045] The range of values ​​for A varies depending on the excitation mechanism. Generally, for inertial drive mechanisms (eccentric block exciters), medium frequency and medium amplitude are preferred, i.e., A = 0.5-6 mm, and 5 mm is selected.

[0046] (2) Mechanical index

[0047] The mechanical index is the ratio of the maximum acceleration Xmax of the load-bearing tank to the gravitational acceleration g, i.e.

[0048] K = 4π 2 f 2 A / g

[0049] In the formula, w = 2πf. To ensure reliable operation of the equipment and extend its service life, K = 3~5 is taken for commonly used inertial vibration equipment, and the mechanical index K = 4 is selected.

[0050] (3) Excitation frequency

[0051] Once the mechanical index K and amplitude A are determined, f = (gk / 4π) 2 A) 0.5 Find the excitation frequency (range: f = 10 ~ 25 Hz, equivalent to 600-1500 times / min). From K = 4 and A = 5 mm, we get f = 14 Hz.

[0052] (4) Vibration direction angle

[0053] The magnitude of the vibration direction angle depends on the equipment application and material properties. To improve the conveying speed, the optimal vibration direction angle corresponds to the mechanical index: when K=4, δ=30-60°, and δ=45° is selected.

[0054] (5) Throwing index D

[0055] The throwing index is the ratio of the maximum acceleration vertical component of the vibrating trough body 1 to the gravitational acceleration g, that is:

[0056] D = Aω 2 sinσ / gcosα

[0057] In the formula, α is the inclination angle of the vibrating equipment. To make the conveyed material slide in a slightly parabolic state, generally 1 < D < 3.3 is taken.

[0058] 2. Analysis of the movement of cut tobacco on the vibrating trough body 1

[0059] For the force conditions of the material in the vibrating trough body 1 and the vibrating trough body 1, please refer to Figure 7 ;

[0060] Vibration direction angle δ: Select 45 degrees;

[0061] Material throwing index D: From D = Ksinδ, it can be known that D = 4sin45° and D = 2.83;

[0062] The vibrating trough body 1 makes a simple harmonic motion s = Asinwt. From the dynamic equilibrium equation, we can get: N = mgcosα - mssinδ;

[0063] When the cut tobacco is thrown off the working surface during transportation, the instantaneous normal pressure N = 0.

[0064] D = Aω 2 sinδ / gcosα

[0065] In the above formula, D = 2.83, A = 0.005m, δ = 45°, ω = √(Kg / A).

[0066] It can be obtained that α = 0°, that is, the vibrating trough body 1 is horizontally arranged.

[0067] When D < 1, the material is stationary relative to the vibrating trough body 1 or only slides; when D > 1, the movement state of the material relative to the vibrating trough body 1 is mainly the throwing motion state. This can reduce the resistance of the material movement and reduce the wear of the material on the vibrating trough body 1. However, if the throwing motion is too intense, it is easy to break the material or make the conveying state unstable. Generally, 1 < D < 3.3 is taken. Therefore, the calculated D = 2.83 meets the working requirements.

[0068] Combined with the above content, the specific working steps of the present utility model include:

[0069] Step S1: Start the equipment

[0070] The external vibration mechanism that provides periodic vibration to the vibrating trough body 1 is activated, so that the vibrating trough body 1 is in the work preparation stage. At this time, the working window 8 opened on the surface of the vibrating trough body 1 is in the closed state, ensuring that the upper surface of the working window 8 is flush with the upper surface of the separating mesh plate 7, so that the tobacco can maintain normal vibration and conveying after falling into the vibrating trough body 1 during the tobacco return process.

[0071] Step S2: Separating Shredded Tobacco

[0072] When the recycled tobacco falls onto the surface of the separating screen plate 7 inside the vibrating trough body 1, and vibrates forward from the feed end to the discharge end of the vibrating trough body 1, the tobacco shreds that meet the process requirements in the recycled tobacco will be vibrated and transported to the dropping port 5 through the upper surface of the separating screen plate 7 under the periodic vibration and then discharged to the designated position. The broken tobacco shreds that do not meet the process requirements in the recycled tobacco will be screened into the area enclosed by the lower surface of the separating screen plate 7 and the bottom end face of the vibrating trough body 1 through the separating mesh of the separating screen plate 7 under the periodic vibration.

[0073] Step S3: Discharge of broken tobacco shreds

[0074] After the shredded tobacco from the recycled tobacco falls into the area enclosed by the lower surface of the separating screen plate 7 and the bottom end of the vibrating trough body 1, it continues to move towards the discharge end of the vibrating trough body 1 under continuous periodic vibration until the shredded tobacco from the recycled tobacco reaches the rectangular discharge screen plate 3 located below the separating screen plate 7. The shredded tobacco will be completely discharged through the rectangular mesh 4 of the rectangular discharge screen plate 3 and guided to the designated position through the guide housing 9, thereby completing the separation process of the shredded tobacco.

[0075] Step S4: Equipment Maintenance

[0076] When the separation process of the shredded tobacco is completed and the equipment is being maintained, the working window 8 is flipped up and the positioning screws used at the mounting positioning hole I2 on the bottom end face of the vibrating trough body 1 are rotated to facilitate the disassembly or installation of the vibrating trough body 1 from the tobacco return system.

[0077] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel rewinding trough for separating and crushing tobacco shreds, characterized in that: The device includes a vibrating trough body, which has a feed end and a discharge end. The bottom surface of the vibrating trough body is provided with, from right to left, a mounting positioning hole I, a rectangular discharge screen plate of the same width as the vibrating trough body, a wire discharge port, and a mounting positioning hole II. A separation screen plate connected to the side wall of the vibrating trough body is provided above the rectangular discharge screen plate. The surface of the separation screen plate has a working window that can be flipped open and closed. A guide shell that is fastened to the side wall of the vibrating trough body is provided below the rectangular discharge screen plate.

2. The novel rewinding groove for separating and crushing tobacco shreds according to claim 1, characterized in that: The mounting positioning holes I and II, through their cooperation with the positioning screws, enable the vibratory trough body to be installed in a predetermined position within the entire wire return system. The mounting positioning hole I is located at the feed end of the vibratory trough body, and the mounting positioning hole II is located at the discharge end of the vibratory trough body.

3. The novel rewinding groove for separating and crushing tobacco shreds according to claim 1, characterized in that: The surface of the rectangular blanking mesh plate has several rectangular mesh holes arranged in a staggered manner.

4. The novel rewinding groove for separating and crushing tobacco shreds according to claim 1, characterized in that: The separating mesh plate extends from the top of the rectangular feeding mesh plate to the side wall of the feeding end of the vibrating trough body, and the surface of the separating mesh plate is evenly opened with a number of separating mesh holes in a staggered arrangement.

5. A novel rewinding trough for separating and crushing tobacco shreds according to claim 1, characterized in that: The separation mesh openings on the surface of the separation mesh plate are larger than the rectangular mesh openings on the surface of the rectangular blanking mesh plate.

6. The novel rewinding groove for separating and crushing tobacco shreds according to claim 1, characterized in that: The working window is located on the surface of the separation mesh plate, directly opposite the location of the mounting positioning hole I.

7. A novel rewinding trough for separating and crushing tobacco shreds according to claim 1, characterized in that: The guide housing is provided with a guide inlet end and a guide outlet end located below it. The guide inlet end is provided with a positioning sidewall, and a side wing is also provided at the edge of the guide inlet end on the side of the positioning sidewall. The positioning sidewall of the guide housing is fastened to the side wall of the vibrating trough body by the cooperation of screws and nuts. The guide outlet end of the guide housing faces the direction of the feed end of the vibrating trough body. The opening size of the guide outlet end is smaller than the opening size of the guide inlet end, and the guide outlet end is offset to the side by a distance relative to the guide inlet end.

Images