A device for preventing mixing of tobacco strands discharged from a tobacco strand storage tank

Abstract

This application discloses a device for preventing mixing of tobacco stems at the discharge end of a tobacco stem storage cabinet, relating to the field of tobacco machinery technology. The device includes a support plate, housings on both sides thereof, a motor and a lead screw driven by the motor within the housings, a connecting block threaded to the lead screw, and a baffle plate connected to the support block and extending out of the housings. The core feature is that the device is installed on the inner wall of the discharge end of the storage cabinet and located below the feeding roller. The baffle plate is driven by the motor to extend and retract obliquely. When the baffle plate extends obliquely downwards, it precisely covers the cabinet head area, intercepting and collecting the retained stems that have loosened due to vibration and moisture absorption, completely blocking their path to the shared discharge conveyor belt. This fundamentally eliminates mixing issues and ensures the accuracy of cigarette formulation and product quality. The device has a compact structure and is compatible with existing production lines.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, specifically to a device for preventing mixing of tobacco stems when discharging from a tobacco stem storage tank. Background Technology

[0002] In modern cigarette production, stems are an indispensable basic raw material. The blending process, which precisely proportions stems and leaves, is crucial to ensuring that the final cigarette product meets design requirements for taste, aroma, and physical properties. To meet the production demands of multiple brands, small batches, and rapid changeovers, cigarette factories commonly employ blending lines with multiple (usually six) stem storage tanks. These tanks share a single discharge conveyor belt, sequentially conveying stems of different brands or batches to downstream weighing scales for precise blending with corresponding leaves. However, due to the realities of frequent production schedule adjustments and brand changes, it often happens that a stem storage tank currently discharging a particular brand's stems is forced to stop discharging before all the material has been released (i.e., only about half has been discharged) due to production scheduling requirements. At this point, the remaining undischarged stems accumulate near the discharge port of the storage tank, commonly referred to in the industry as the "tank head."

[0003] When subsequent batches of skein storage tanks start discharging or stop operating, their drive mechanisms (such as feed rollers and conveyor belt motors) inevitably generate mechanical vibrations. These vibrations are transmitted to adjacent storage tanks through the tank structure and shared support. Simultaneously, skein strands remaining at the tank head, exposed to the humid workshop environment for extended periods, continuously absorb moisture from the air, resulting in significant hygroscopic expansion. This causes their structure to become loose, their volume to increase, and their cohesion to decrease. Under the combined effect of the external disturbance from the equipment's vibrations and the physical deterioration caused by the skein strands' own hygroscopic expansion, some of the skein strands originally piled at the tank head are highly susceptible to instability, slipping and collapsing. Ultimately, they fall through the gap between the tank's inner wall and the feed rollers, or from the inner wall edge, directly onto the shared discharge conveyor belt below. This leads to the accidental mixing (i.e., "mixing") of skein strands that should belong to the previous batch and be discarded with the skein strands of the new batch currently being conveyed. This unexpected mixing of different brands of cigarette stems fundamentally undermines the precision of the cigarette formula and is a direct cause of serious quality incidents such as batch quality fluctuations and abnormal product taste.

[0004] Therefore, this application proposes a device to prevent mixing of skewer discharge from a skewer storage tank. A physical baffle that can be precisely deployed and retracted can be dynamically deployed in the tank head area at the discharge end of the storage tank to actively intercept and effectively collect skewer strands that have fallen off due to vibration and swelling, thus completely blocking them from falling into the channel of the shared discharge belt and preventing the mixing of skewer strands at the source. Utility Model Content

[0005] The main purpose of this application is to provide a device for preventing mixing of shredded stems from being discharged from a shredded stem storage tank, which aims to solve the technical problem of unintended mixing of shredded stems of different brands.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A device for preventing mixing of skein fibers at the discharge end of a skein fiber storage tank is installed on the inner wall of the discharge end of the skein fiber storage tank and located below the feeding roller. It includes a support plate, with a housing on each of the left and right outer walls of the support plate. Fixed seats are provided on both the front and rear end walls of the support plate. The front and rear side walls of the housings are connected to the side walls of the support plate via connecting plates. A motor is installed on the inner bottom wall of the housing. A lead screw is locked to the output end of the motor via a coupling. The end of the lead screw away from the motor is rotatably connected to the inner wall of the housing via a bearing. A connecting block is threaded onto the outer wall of the lead screw. A support block is provided at the bottom end of the connecting block. The support block extends downward and passes through the lower end face of the housing, with a baffle plate at its bottom end. The baffle plate is used to collect the skein fibers accumulated at the discharge end of the skein fiber storage tank to prevent them from falling onto the discharge belt.

[0008] As a further improvement of this application, a rectangular hole communicating with the inner cavity is provided on the lower end face of the housing, and the support block passes through the rectangular hole.

[0009] As a further improvement of this application, the outer ring of the bearing is fixedly connected to the inner wall of the housing through the bearing seat, and the inner ring of the bearing is interference-fitted with the outer wall of the lead screw.

[0010] As a further improvement of this application, the outer end of the baffle plate is inclined downward to fit against the inner wall of the discharge end of the wire storage tank.

[0011] The technical solution provided in this application may include the following beneficial effects:

[0012] This application utilizes a dynamically deployed, precisely retractable baffle plate at the discharge end of the stem storage tank (where retained stems accumulate). This effectively solves the problem of stems loosening and slipping caused by vibrations from subsequent tank start-ups and shutdowns, as well as the moisture absorption and expansion of retained stems. The device actively intercepts and reliably collects these detached stems, completely blocking their path to the shared discharge conveyor belt below. This fundamentally prevents accidental mixing of stems from different brands, ensuring the accuracy of the cigarette formula and avoiding serious quality incidents such as batch quality fluctuations and abnormal taste. Simultaneously, the baffle plate's flexible retraction and retraction, achieved through a motor-driven screw mechanism, seamlessly adapts to the frequent brand changes and alternating start-ups and shutdowns in cigarette production. When protection is needed, it quickly moves diagonally downwards to conform to the tank wall, forming an interception; during normal discharge or cleaning, it promptly retracts diagonally upwards, without interfering with the smooth transport of materials, ensuring the efficient and continuous operation of the blending process. Furthermore, its compact structural design allows it to be directly installed on the inner wall of the discharge end of the existing storage tank via a support plate and a fixed base, located below the feeding roller. It is highly compatible with the existing equipment layout and operating mode, without requiring large-scale modifications to the storage tank body, discharge belt, or production line. It achieves seamless integration at extremely low modification costs without affecting the original process flow, demonstrating excellent engineering practicality and providing an efficient and reliable solution to the long-standing problem of mixed-brand production. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the shell of this utility model.

[0016] The attached diagram lists the components represented by each number as follows:

[0017] 1. Support plate; 2. Fixing base; 3. Housing; 4. Connecting plate; 5. Motor; 6. Lead screw; 7. Bearing; 8. Connecting block; 9. Support block; 10. Material stop plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely a part of the embodiments of this application, and not all of them. Without conflict, the embodiments in this application and the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] See Figure 1-2 As shown, a device for preventing mixing of skein and filament discharge from a skein and filament storage tank is installed on the inner wall of the discharge end of the skein and filament storage tank and located below the feeding roller. It includes a support plate 1, with a housing 3 on each of the left and right outer walls of the support plate 1. Fixed seats 2 are provided on both the front and rear end walls of the support plate 1. The front and rear side walls of the housing 3 are connected to the side walls of the support plate 1 through connecting plates 4. A motor 5 is provided on the inner bottom wall of the housing 3. A lead screw 6 is locked to the output end of the motor 5 through a coupling. The end of the lead screw 6 away from the motor 5 is rotatably connected to the inner wall of the housing 3 through a bearing 7. A connecting block 8 is threadedly connected to the outer wall of the lead screw 6. A support block 9 is provided at the bottom end of the connecting block 8. The support block 9 extends downward and passes through the lower end face of the housing 3. A baffle plate 10 is provided at its bottom end. The baffle plate 10 is used to collect the skein and filaments accumulated at the discharge end of the skein and filament storage tank to prevent them from falling onto the discharge belt.

[0020] Furthermore, a rectangular hole communicating with the inner cavity is provided on the lower end face of the housing 3, and the support block 9 passes through the rectangular hole.

[0021] Furthermore, the outer ring of the bearing 7 is fixedly connected to the inner wall of the housing 3 through the bearing 7 seat, and the inner ring of the bearing 7 is interference-fitted with the outer wall of the lead screw 6.

[0022] Furthermore, the outer end of the baffle plate 10 is inclined downwards to fit against the inner wall of the discharge end of the wire storage tank.

[0023] For those skilled in the art, all electrical components and parts in this case are general standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods. All models are compatible with this solution and can operate normally. All electrical components in this case are connected to their compatible power supplies through wires. According to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence should refer to the working principle below, and the electrical connection is completed by the sequential operation of each electrical component. The detailed connection method is a well-known technology in the art, and the electrical control will not be described further.

[0024] One specific application of this embodiment is:

[0025] In use, the device is installed on the inner wall of the stem storage tank via the fixing base 2 using welding or bolting, and is located above the discharge end. The housing 3 and the baffle plate 10 are placed below the feeding roller. The motor 5 causes the lead screw 6 to rotate through the bearing 7. The lead screw 6 causes the connecting block 8 to move the support block 9 and the baffle plate 10 diagonally downward, moving the baffle plate 10 outward to contact the inclined wall of the discharge end of the stem storage tank. This is used to collect the stems that fall from the tank head position, thereby preventing the stems at the tank head position from falling downward from the storage tank onto the discharge belt and causing material mixing. By reversing the start of the motor 5, the connecting block 8 causes the support block 9 and the baffle plate 10 to move diagonally upward, removing the baffle plate 10 from the tank head position, allowing the stems to be conveyed normally.

[0026] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, alterations, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A device for preventing mixing of raw materials from a stalk storage tank, installed on the inner wall of the discharge end of the stalk storage tank and located below the feeding roller, characterized in that, The system includes a support plate (1), with a housing (3) on each of the left and right outer walls of the support plate (1). Fixing seats (2) are provided on both the front and rear end walls of the support plate (1). The front and rear side walls of the housing (3) are connected to the side walls of the support plate (1) through connecting plates (4). A motor (5) is provided on the inner bottom wall of the housing (3). A lead screw (6) is locked to the output end of the motor (5) through a coupling. The end of the lead screw (6) away from the motor (5) is rotatably connected to the inner wall of the housing (3) through a bearing (7). A connecting block (8) is threaded onto the outer wall of the lead screw (6). A support block (9) is provided at the bottom end of the connecting block (8). The support block (9) extends downward and passes through the lower end face of the housing (3). A baffle plate (10) is provided at its bottom end. The baffle plate (10) is used to collect the accumulated skeins at the discharge end of the skein storage tank to prevent them from falling onto the discharge belt.

2. The anti-mixing device for the discharge of stalks from the storage tank according to claim 1, characterized in that, The lower end face of the housing (3) is provided with a rectangular hole communicating with the inner cavity, and the support block (9) passes through the rectangular hole.

3. The anti-mixing device for the discharge of stalks from the storage tank according to claim 1, characterized in that, The outer ring of the bearing (7) is fixedly connected to the inner wall of the housing (3) through the bearing seat, and the inner ring of the bearing (7) is interference-fitted to the outer wall of the lead screw (6).

4. The anti-mixing device for the discharge of stalks from the storage tank according to claim 1, characterized in that, The outer end of the baffle plate (10) is inclined downward to fit the inner wall of the discharge end of the wire storage tank.

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