A restrictor with a bypass channel

Abstract

The utility model relates to cigarette production equipment technical field discloses a kind of by-pass channel's limiting tube, including limiting tube main body, flap, flow guide pipe and flap drive mechanism. Flap is set at the material guide exit of limiting tube side wall, is rotatably connected with limiting tube by pivot, can be closed guide exit in closed state, forms the flow guide slope in open state, and material is introduced by-pass flow guide pipe. Flap drive mechanism includes electric push rod, rack, gear arm and rotating disc and the like structure, and the automatic opening and closing control of flap is realized by gear-rack linkage mode. The device can actively guide residual material by-pass discharge when batch switches, avoid mixing and weighing error, improve electronic scale data accuracy and batch traceability reliability, and be applicable to the upgrading of limiting control equipment in cut tobacco production line.

Description

Technical Field

[0001] This utility model belongs to the technical field of cigarette production equipment, specifically relating to a limiting tube with a bypass channel. Background Technology

[0002] In the tobacco processing section of cigarette factories, the limiting tube is widely used in the feeding stage at the front end of the electronic scale. It is mainly used to regulate the flow rate of materials such as tobacco shreds and tobacco stems from the previous stage, so as to achieve pre-limit control and thus ensure the accuracy of the weighing data of the electronic scale and the continuity and stability of the material feeding process.

[0003] The flow control tube is typically a vertical structure with an internal flow-limiting channel, and it is generally kept open. The upper end of this channel connects to upstream equipment such as a lifting belt or vibrating conveyor via natural drop, allowing material to flow into the electronic scale under its own weight. During normal production, this structure meets the needs of continuous weighing. However, at the end of a production batch or during batch changeover, due to a short-term delay in the electronic scale's response, and the fact that the flow control tube itself cannot actively cut off the material supply path, residual material from the upstream equipment continues to slide into the electronic scale under gravity. This uncontrolled inflow of residual material can not only cause the electronic scale to record data from a different batch, affecting formula accuracy, but it can also lead to incorrect flow data being collected by the Manufacturing Execution System (MES), impacting product quality control and batch traceability.

[0004] This application is submitted to address the aforementioned issues. Utility Model Content

[0005] The purpose of this invention is to provide a limiting tube with a bypass channel, which aims to solve the technical problem that the existing limiting tube structure cannot actively cut off the material supply path during batch switching, resulting in residual material accidentally entering the electronic scale and affecting the weighing accuracy and batch traceability. By setting an openable and closable flap structure and an automatic / manual control mechanism, the precise switching of material flow direction and bypass diversion can be realized, thereby improving the control reliability and data acquisition accuracy of the limiting tube in the continuous production process of multiple batches.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A limiting tube with a bypass channel is provided, comprising: a limiting tube body 1, wherein a material outlet 11 is provided on one side wall;

[0008] Flip plate 2 is set at the material outlet 11, and a rotating shaft 3 is inserted through it in the width direction. The two ends of the rotating shaft 3 pass through the opposite side walls of the limiting tube body 1 and are rotatably connected to them, so that the flip plate 2 can rotate around the rotating shaft 3, thereby switching the material flow direction.

[0009] When the flap 2 is in the open state, one end of it extends out of the limiting tube body 1 and is located above the guide tube 4, and the other end is located inside the limiting tube cavity and is adjacent to or in contact with the inner surface of the limiting tube sidewall, forming an inclined guide slope to guide the material into the guide tube 4.

[0010] The guide tube 4 is located outside the main body 1 of the limiting tube and below the material outlet 11, and is used to receive the material discharged by the flap 2;

[0011] A flap drive mechanism is used to drive the flap 2 to open and close around the rotating shaft 3.

[0012] Preferably, the flip-plate driving mechanism includes: a rotary disk 5, which is fixedly connected to one end of the rotating shaft 3;

[0013] A protruding structure 6 is disposed on the outer peripheral surface of the rotating disk 5;

[0014] The gear arm 7 has a connecting arm 71 at one end, and a groove 711 extending along the length of the connecting arm 71 is provided on the connecting arm 71. The protruding structure 6 is accommodated in the groove 711 and can reciprocate and slide along the extension direction of the groove 711. The other end of the gear arm 7 is provided with gear teeth 72, which mesh with the rack 8.

[0015] The rack 8 meshes with the gear tooth 72 of the gear arm 7 and is slidably connected to the outer wall of the limiting tube body 1 through the limiting seat 10;

[0016] The electric actuator 9, whose driving end is connected to the rack 8, is used to drive the rack 8 to reciprocate in the horizontal direction, thereby driving the flap 2 to rotate and open and close through the meshing structure of the rack 8 and the gear tooth profile 72.

[0017] Preferably, the outer peripheral edge of the flap 2 is provided with a rubber sealing edge. When the flap 2 is closed, the rubber sealing edge fits against the edge of the material outlet 11 to form a sealing surface. When the flap 2 is opened, the rubber sealing edge at one end contacts the inner wall of the main cavity of the limiting tube to reduce the impact between the flap and the cavity.

[0018] Preferably, the top end of the guide pipe 4 is provided with a funnel-shaped structure to guide the material smoothly into the guide pipe.

[0019] Preferably, the guide tube 4 is connected to the outer wall of the limiting tube body 1 via a fixing rod 41, which is used to fix the guide tube to the outside of the limiting tube body.

[0020] Preferably, the limiting seat 10 is fixedly connected to the outer wall of the limiting tube body 1, and both ends of the rack 8 are cylindrical structures, which are respectively inserted into the through holes provided on the two limiting seats 10, and can slide along the rack axis in the through holes; the rack 8 is provided with limiting and sealing structures at both ends to prevent the rack from coming out of the limiting seat 10.

[0021] Preferably, the electric actuator 9 is connected to the controller via a signal line. The controller is used to control the electric actuator 9 to move back and forth in the horizontal direction, thereby realizing the automatic control of the opening and closing action of the flap 2.

[0022] Preferably, a switch assembly is provided on the outer wall of the limiting tube. The switch assembly includes a manual open button and a manual close button. The buttons are electrically connected to the electric actuator 9 through a controller and are used to manually control the electric actuator to drive the flap 2 to rotate, so as to realize the opening and closing of the bypass channel.

[0023] The advantages of this utility model over the prior art are as follows:

[0024] 1. During the batch switching stage, this utility model device can actively divert residual materials to prevent them from accidentally entering the electronic scale, avoid weighing errors and batch mixing, and ensure the controllability of product quality and the accuracy of data traceability.

[0025] 2. This utility model combines a gear-rack transmission structure with an electric actuator drive to achieve smooth and rapid response of the flip-plate action, with a short response time. Combined with precise control by a PLC or controller, it effectively reduces the uncertainty of manual operation and significantly improves the overall stability of the feeding system. Furthermore, the rational design of this transmission drive structure ensures that while achieving the bypass channel switching function, it does not affect the original material limiting and conveying functions of the limiting tube.

[0026] 3. Automatic control of flap opening and closing eliminates the need for machine shutdown or frequent manual operation, enabling rapid cutting and restoration of material channels, shortening batch changeover time, and improving the continuous operation capability of the production line.

[0027] 4. The automated design reduces manual intervention. Operators only need to use the manual button to switch modes in special circumstances, which reduces the burden of operation and lowers operating costs. The automatic and manual dual-mode switching ensures that the equipment can still be operated in the event of power failure or abnormality, ensuring production safety and convenient equipment maintenance.

[0028] 5. The edges of the flap are equipped with rubber sealing blades to reduce dust emission, and the guide pipe effectively recovers residual materials, reducing waste, simplifying the cleaning process, and improving the standardization of material management and the quality of the production environment.

[0029] 6. The device has a compact structure and adopts a standard connection method, which facilitates seamless integration with existing electronic scales and silk-making equipment, and supports flexible transformation and upgrading of mass production lines. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a longitudinal cross-sectional view of the flap in the limited tube of this utility model when it is open;

[0032] Figure 2 This is a longitudinal cross-sectional view of the flap in the limited tube of this utility model when it is closed;

[0033] Figure 3 This is a schematic diagram of the mounting surface layout and related connection structure of the flip-plate drive mechanism of this utility model;

[0034] Reference numerals in the attached drawings: 1. Main body of the limiting tube; 11. Material outlet; 2. Flip plate; 3. Rotating shaft; 4. Guide tube; 5. Rotating disk; 6. Protruding structure; 7. Gear arm; 71. Connecting arm; 711. Groove; 72. Gear tooth profile; 8. Rack; 9. Electric actuator; 10. Limiting seat. Detailed Implementation

[0035] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figures 1 to 3 As shown, this embodiment provides a limiting tube with a bypass channel, mainly comprising:

[0037] The main body of the limited tube 1 is a vertical hollow tube with a material outlet 11 on one side wall.

[0038] Flip plate 2 is installed at the material outlet 11. A rotating shaft 3 is inserted through the width of the flip plate. The two ends of the rotating shaft 3 pass through the mounting holes on the opposite side walls of the limiting tube body 1 and are rotatably connected to the limiting tube body 1, so that the flip plate 2 rotates around the rotating shaft 3 to achieve opening and closing switching.

[0039] Connection structure between the rotating shaft 3 and the main body 1 of the limiting tube: The rotating shaft 3 passes through the mounting hole in the side wall of the main body 1 of the limiting tube. The diameter of the hole is slightly larger than the outer diameter of the rotating shaft. A low-friction bearing bushing is embedded in the hole to reduce rotational friction and improve the rotational flexibility and durability of the rotating shaft. Retaining rings are provided at both ends of the rotating shaft to fix it to the side wall to prevent axial slippage.

[0040] The guide tube 4 is located on the outside of the main body 1 of the limiting tube and below the material outlet 11. It is used to receive the material discharged by the flap 2. The top of the guide tube is provided with a funnel-shaped structure. The guide tube is connected to the outer wall of the main body of the limiting tube through the fixing rod 41 to achieve stability.

[0041] The flap drive mechanism includes a rotating disk 5 (fixedly connected to one end of the rotating shaft 3), a protruding structure 6 on the outer periphery of the rotating disk, a gear arm 7 (the connecting arm 71 has a groove 711 along the length direction to accommodate the protruding structure 6 and allow it to slide, and the other end is provided with gear teeth 72), a rack 8 (meshing with the gear teeth 72, and slidably connected to the outer wall of the limiting tube body 1 through the limiting seat 10, and the rack has limiting and sealing structures at both ends to prevent it from coming off), and an electric push rod 9 (connected to the rack 8, driving it to move horizontally back and forth, driving the flap 2 to open and close).

[0042] The limiting seat 10 is fixedly connected to the outer wall of the limiting tube body 1 and is used to guide and limit the sliding of the rack 8;

[0043] The electric control system includes an electric push rod 9 connected to a controller via a signal line, which enables automatic opening and closing of the flap 2. The outer wall of the limiting tube is equipped with a manual opening button and a manual closing button to enable manual control of the flap opening and closing.

[0044] In addition, the outer periphery of the flap 2 is provided with a rubber sealing edge, which fits against the edge of the material outlet 11 to form a seal when closed, and the edge contacts the inner wall of the limited flow tube when opened to reduce impact.

[0045] The working process and working principle of this embodiment are as follows:

[0046] 1. Normal material supply status

[0047] With the flap 2 in the closed position, the rubber sealing edge is tightly against the edge of the material outlet 11, and the material flows into the electronic scale by gravity through the main channel inside the limiting tube body 1. The electric actuator is stationary, the rack 8 and gear arm 7 remain fixed, and the flap does not move.

[0048] 2. Enable bypass channel during batch switching

[0049] When the bypass channel is opened during batch switching, the controller drives the electric push rod 9 to move the rack 8 horizontally. The rack 8 drives the gear arm 7 to rotate through gear meshing, thereby driving the flap 2 to rotate around the shaft 3 to the open state. At this time, one end of the flap 2 extends out of the limiting tube body 1 and is located above the guide tube 4, while the other end extends into the limiting tube cavity and abuts against the inner wall of the cavity, forming an inclined guide slope. This is used to guide the residual material in the limiting tube to be discharged through the guide tube, preventing it from continuing to enter the electronic scale and preventing batch mixing and weighing errors.

[0050] 3. Bypass channel closed, normal material supply restored.

[0051] After the batch switching is completed, the controller drives the electric push rod 9 to move in the opposite direction, so that the flap 2 is reset and closed, the seal is restored, and the normal material limited feeding is restored.

[0052] 4. Manual control function

[0053] In case of automatic control malfunction or maintenance, operators can manually control the electric actuator to open and close the flap, ensuring system safety and flexibility.

[0054] This embodiment, through the above structure and working principle, realizes the active switching and bypass diversion of material paths during batch switching, improves weighing accuracy and production continuity, and ensures the stability and reliability of the flip-plate drive structure, making it easy to maintain.

[0055] 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 limiting tube with a bypass channel, characterized in that, include: The main body of the limited tube (1) has a material outlet (11) on one side wall. A flap (2) is set at the material outlet (11), and a rotating shaft (3) is passed through it in the width direction. The two ends of the rotating shaft (3) pass through the opposite side walls of the limiting tube body (1) and are rotatably connected to it, so that the flap (2) can rotate around the rotating shaft (3) to switch the material flow direction. When the flap (2) is in the open state, one end of it extends out of the limiting tube body (1) and is located above the guide tube (4), and the other end is located inside the limiting tube cavity and is adjacent to or in contact with the inner surface of the limiting tube sidewall, forming an inclined guide slope to guide the material into the guide tube (4). The guide tube (4) is located outside the main body (1) of the limiting tube and below the material outlet (11) for receiving the material discharged by the flap (2); A flap drive mechanism is used to drive the flap (2) to open and close around the rotating shaft (3).

2. The metering tube according to claim 1, characterized in that The flip-board driving mechanism includes: A rotating disk (5) is fixedly connected to one end of the rotating shaft (3); A protruding structure (6) is provided on the outer peripheral surface of the rotating disk (5); The gear arm (7) has a connecting arm (71) at one end, and a groove (711) extending along the length of the connecting arm (71) is provided on the connecting arm (71); the protruding structure (6) is accommodated in the groove (711) and can slide back and forth along the extension direction of the groove (711); the other end of the gear arm (7) is provided with gear teeth (72) that mesh with the rack (8); The rack (8) meshes with the gear tooth profile (72) of the gear arm (7) and is slidably connected to the outer wall of the limiting tube body (1) through the limiting seat (10); An electric actuator (9) is connected to the rack (8) at its driving end. It is used to drive the rack (8) to move back and forth in the horizontal direction, thereby driving the flap (2) to rotate and open and close through the meshing structure of the rack (8) and the gear tooth profile (72).

3. The metering tube according to claim 2, characterized in that The outer periphery of the flap (2) is provided with a rubber sealing edge. When the flap (2) is closed, the rubber sealing edge fits against the edge of the material outlet (11) to form a sealing surface. When the flap (2) is opened, the rubber sealing edge at one end contacts the inner wall of the main cavity of the limiting tube to reduce the impact between the flap and the cavity.

4. The metering tube of claim 1, wherein The top of the guide pipe (4) is provided with a funnel-shaped structure to guide the material smoothly into the guide pipe.

5. The metering tube according to claim 1, characterized in that The guide tube (4) is connected to the outer wall of the limiting tube body (1) by a fixing rod (41) to fix the guide tube to the outside of the limiting tube body.

6. The metering tube according to claim 2, characterized in that The limiting seat (10) is fixedly connected to the outer wall of the limiting tube body (1). Both ends of the rack (8) are cylindrical structures, which are respectively inserted into the through holes provided on the two limiting seats (10) and can slide along the rack axis in the through holes. The rack (8) is provided with limiting and sealing structures at both ends to prevent the rack from coming out of the limiting seat (10).

7. The metering tube according to claim 2, characterized in that The electric push rod (9) is connected to the controller via a signal line. The controller is used to control the electric push rod (9) to move back and forth in the horizontal direction, thereby realizing the automatic control of the opening and closing action of the flap (2).

8. The metering tube according to claim 2, characterized in that The outer wall of the limiting tube is provided with a switch assembly, which includes a manual open button (101) and a manual close button (102). The buttons are electrically connected to the electric push rod (9) through the controller and are used to manually control the electric push rod to drive the flap (2) to rotate, so as to realize the opening and closing of the bypass channel.

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