Cantilever weighing sensor on-line measuring device for stem rejection amount

Abstract

This invention discloses an online measurement device for the amount of stems removed by a cantilever weighing sensor, comprising a mounting base and a gate cavity, an air separation device, a weighing device, and a stem conveying device mounted thereon. The mounting base has a stem receiving port at its top, which connects to the gate cavity. The air separation device includes a suspension separation chamber and a suction assembly. The weighing device includes a weighing scoop, a support arm, and a cantilever sensor connected thereto. The stem conveying device includes a stem collection hopper and a negative pressure recovery pipe. This invention offers highly practical operation, ensures the stability of the stem removal rate, reduces production costs, and improves the effective utilization rate of tobacco shreds. It effectively reduces the labor intensity of operators frequently measuring the amount of fallen stems, enhances the quality control capabilities of operators and on-site process quality personnel, and has a significant impact on improving the pass rate of the internal product quality after cigarette packaging.

Description

Technical Field

[0001] This invention relates to the field of cigarette processing, and specifically to an online measuring device for cantilever weighing sensors to determine the amount of stems and twigs removed. Background Technology

[0002] In the cigarette production process, the main points of tobacco loss that cannot be recycled on the production site are concentrated in the feeding machine screening, dust removal, and fallen tobacco, as well as tobacco dust, fallen stems, and relatively small amounts of fallen tobacco and fumes in the cigarette rolling process. This part of the tobacco dust is sent to the fan room by negative pressure suction and processed by the pressing equipment. Among these, the most controllable and operable aspect is the management of fallen stems in the cigarette rolling machine.

[0003] The cigarette industry has long been committed to improving stem separation systems to increase the stem content of cigarettes after rolling. Therefore, the amount of stems dropped by the feeding and forming machine is a key factor determining cigarette quality. However, research on the precise control of stem dropping is limited, with very few reports on such methods. Currently, the measurement of stem removal effectiveness relies heavily on manual labor, with some companies using instruments to assist, but manual intervention is still necessary. Correspondingly, online real-time automatic measurement devices are scarce.

[0004] In recent years, to improve the intrinsic quality of cigarettes, reduce raw material consumption, enhance product quality, and optimize process stability indicators, major cigarette manufacturers have been continuously innovating and improving the stem-shred separation effect, precisely controlling the amount of fallen stems, reducing tobacco consumption per unit, and achieving breakthroughs in process quality. During cigarette production, the quality of incoming tobacco and the removal of stems are the most important factors affecting the physical properties of cigarettes. For cigarette rolling machines operating under stable conditions, the removal of stems can also serve as an important reference for the quality of incoming tobacco. In actual production, excessive stem removal intensity will result in a high content of stems with shreds, leading to increased tobacco loss and waste; insufficient stem removal may result in excessive stem content in the rolled cigarette, causing poor weight stability, large fluctuations in the SD weight of a single cigarette, and defects in cigarette surface punctures, among other process quality issues.

[0005] Under current equipment conditions, the distribution of stem removal volume is characterized by random occurrence, difficulty in prevention, and unpredictability. Therefore, strengthening the monitoring and measurement of stem removal volume in cigarette machines is not only to implement the current industry requirements for energy conservation and cost reduction, but also a crucial process controlling the amount of stem entering the cigarette forming stage, thus having a decisive impact on the stem content in cigarettes.

[0006] Real-time online monitoring of the stem removal flow rate during secondary stem separation, numerical adjustment through data collection and analysis, and the function of extracting and reusing tobacco from the stems are all crucial measures to ensure refined quality control of high-end products. This is of great urgency and necessity for improving product quality. Summary of the Invention

[0007] To overcome the above shortcomings, this invention provides an online measurement device for the amount of stems removed by a cantilever weighing sensor. This device integrates online measurement of the amount of stems removed by a cantilever and online separation of stems and tobacco shreds, thus changing the problems of manual sampling and post-inspection, low inspection frequency, high randomness, large error, difficulty in achieving real-time and online measurement, and weak guidance for controlling the stem separation effect.

[0008] The technical solution adopted by this invention to solve its technical problem is as follows:

[0009] The cantilever weighing sensor online measuring device for stem removal includes a mounting base and a gate cavity, an air separation device, a weighing device, and a stem conveying device mounted thereon.

[0010] The top of the mounting box is provided with a sticky tag receiving port, which is connected to the gate cavity;

[0011] The gate cavity includes a support frame disposed on one side, a gate installed in the cavity, a guide base plate located at its bottom, and a gate shaft installed between its side plates for gate installation. The gate shaft is connected to a flipping mechanism. The gate has an open working position and a closed working position when the flipping mechanism is activated, so that the tobacco stems and tobacco shreds falling into the gate cavity enter the air separation device and the weighing device under the guidance of the guide base plate and the gate, respectively.

[0012] The air separation device includes a suspension separation chamber and a suction assembly;

[0013] The weighing device includes a weighing scoop, a support arm, and a cantilever sensor connected thereto. The support arm is rotatably mounted on a tilting arm, and the lower end of the support arm is connected to a drive mechanism. Under the action of the drive mechanism, the support arm rotates around the tilting arm as an axis, causing the weighing scoop to tilt.

[0014] The stem conveying device includes a stem collection hopper and a negative pressure recovery pipeline.

[0015] As an improvement to the above technical solution, when the gate is in the open working position, the gate is perpendicular to the horizontal plane, and the tobacco stems and shreds falling into the gate cavity enter the air separation chamber under the action of the guide bottom plate for extraction and separation of tobacco shreds from the stem sticks; when the gate is in the closed working position, the angle between the gate and the horizontal plane is at its maximum value, and the tobacco stems and shreds falling into the gate cavity enter the weighing scoop for automatic weighing under the action of the inclined gate.

[0016] As an improvement to the above technical solution, the flipping mechanism includes a cylinder I, a connecting block, a connecting rod, and a connecting rod pin. The connecting block and the connecting rod are movably connected by the connecting rod pin, and the connecting rod is connected to the gate shaft.

[0017] The flipping mechanism also has different working positions corresponding to the gate. When the cylinder I extends to its limit position, the gate is close to the side wall of the gate cavity, and the gate is in a fully open state. The falling tobacco stems and shreds fall into the stem-shred separation chamber by utilizing the inclined slope of the guide plate. When the cylinder I retracts back to the initial position, it drives the gate on the gate shaft to rotate counterclockwise, causing the upper edge of the gate to flip and fit against the inner end face of the rear plate of the gate cavity. The gate is in a fully closed state, and the lower part of the gate cavity is sealed. The falling tobacco stems and shreds are guided into the weighing scoop by utilizing the inclined slope formed after the gate is closed.

[0018] As an improvement to the above technical solution, the gate cavity is fixed to the side plate of the mounting box by two support frames.

[0019] As an improvement to the above technical solution, the gate shaft is fixed between the two side plates of the gate cavity by bearings and positioning end caps at both ends.

[0020] The guide plate is used to guide and redirect the vertically falling tobacco stems and shreds, allowing them to enter the air separation device.

[0021] Through holes are provided on the bottom of the two side plates of the gate cavity in the thickness direction for the installation of the positioning rod of the air separation chamber.

[0022] Optionally, cylinder I is a double-piston rod double-acting cylinder.

[0023] Optionally, the cylinder I is equipped with upper and lower limit magnetic rings, which limit the extreme positions of the gate opening and closing. When the gate does not reach the working position, the magnetic ring emits an alarm signal.

[0024] Optionally, the bearing may be a deep groove ball bearing.

[0025] As an improvement to the above technical solution, a small guide plate is installed on the back side of the gate to prevent falling tobacco stems and shreds from falling onto the gate shaft.

[0026] As an improvement to the above technical solution, the suction assembly includes a suction pipe, a vacuum generator, and a pipe connected in sequence.

[0027] As an improvement to the above technical solution, positioning rods connected to the gate cavity are fixed on both sides of the suspension separation cavity.

[0028] Optionally, the end of the positioning rod is provided with a 30° chamfer to facilitate insertion into the through hole and achieve quick engagement or disengagement.

[0029] Optionally, an observation window is provided at the front end of the suspension separation chamber.

[0030] As an improvement to the above technical solution, the weighing device is mounted entirely on a weighing base plate, and the weighing base plate is fixed on a mounting box base.

[0031] As an improvement to the above technical solution, the weighing spoon and the cantilever sensor are fixedly installed together by an L-shaped sensor connecting bracket.

[0032] As an improvement to the above technical solution, the cantilever sensor is connected to a signal amplifier, which is installed on the upper end of the support arm.

[0033] As an improvement to the above technical solution, the drive mechanism includes cylinder II and a spherical bearing disposed at the front end of cylinder II. The spherical bearing is connected to the lower end of the support arm via a connecting pin.

[0034] Optionally, the signal amplifier is selected as the AUTODA TDA-02C weight transmitter signal amplifier.

[0035] Optionally, the cylinder II is provided with left and right limiting magnetic rings to limit the extreme positions of the cylinder rod extension and retraction.

[0036] Optionally, the cylinder II is fixed to the weighing base plate by a cylinder pin and a horizontal locking bracket.

[0037] Optionally, the cylinder II is equipped with a pressure-adjusting quick-connect fitting.

[0038] As an improvement to the above technical solution, the horizontal locking frame includes an inner positioning seat and an outer positioning sleeve. A level is provided on the inner positioning seat, and the level is used to calibrate the accuracy of the cylinder's horizontal operation.

[0039] Optionally, the cantilever sensor is a single-point force sensor with a range of 1 kg.

[0040] Optionally, the weighing spoon has an asymmetrical structure that is wider at the top and narrower at the bottom, with its left and right sides tilted asymmetrically to facilitate the pouring of the weighed tobacco stems and shreds from the weighing spoon.

[0041] As an improvement to the above technical solution, the stalk collection hopper is a centrally symmetrical quadrangular pyramidal structure.

[0042] As an improvement to the above technical solution, the connection between the negative pressure recovery pipe and the stem collection hopper is modified by reducing the radius and height of the negative pressure recovery pipe to lower the height of the stem collection hopper relative to the upper component, thus forming a flat installation interface at the front end, which makes the installation and disassembly of the hopper quick and easy.

[0043] Optionally, the stem receiving port is funnel-shaped.

[0044] As an improvement to the above technical solution, the mounting box includes a mounting frame side plate, a mounting frame rear plate, a mounting frame bottom plate, and feet. The mounting frame side plate is used for the installation and fixing of the gate cavity, and the mounting frame rear plate is used for the connection and fixing of the weighing device.

[0045] As an improvement to the above technical solution, triangular rib support plates are provided on the side plates, rear plates, and bottom corner bends of the mounting frame plate to improve the strength of the mounting frame plate.

[0046] The beneficial effects of this invention are as follows:

[0047] This invention organically combines online timed measurement of tobacco stems with the extraction, separation, and reuse of tobacco shreds from the stems, achieving the expected multi-functional integrated application effect for production guidance, thereby meeting production process requirements and better realizing an automated integrated production operation mode of production, monitoring, feedback, and early warning.

[0048] Through the ingenious design of an automatic online measurement and separation device based on the amount of stems removed, the system achieves the separation and extraction of tobacco shreds from the stems under normal working conditions, the measurement of stem flow rate under weighing conditions via a timed, real-time cantilever sensor, and the collection and uploading of data based on the measured removal amount. This facilitates timely adjustments to the stem removal values ​​by managers, provides standardized and scientific data support for cigarette production, reduces tobacco waste during the production process, helps ensure the stability of the single-cigarette weight deviation SD index, and reduces quality problems such as cigarette punctures.

[0049] The device of this invention is highly practical in operation, ensuring the stability of the stem removal rate, reducing production costs, and improving the effective utilization rate of tobacco shreds, resulting in good application effects. In practical applications, it can effectively reduce the labor intensity of operators who frequently measure the amount of fallen stems, enhance the quality control capabilities of operators and on-site process quality personnel, and have a certain influence on improving the pass rate of the intrinsic product quality after cigarette rolling. Attached Figure Description

[0050] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0052] Figure 2 This is a schematic diagram of the gate cavity;

[0053] Figure 3 This is a schematic diagram of the closed working position structure of the gate cavity;

[0054] Figure 4 An exploded view of the installation structure of the gate and the tilting mechanism;

[0055] Figure 5 This is a schematic diagram of the air separation device and its installation structure.

[0056] Figure 6 This is a schematic diagram of the weighing device.

[0057] Figure 7 This is a schematic diagram of the cantilever sensor mounting structure of the weighing device;

[0058] Figure 8 This is a schematic diagram of the drive mechanism of the weighing device;

[0059] Figure 9 This is a schematic diagram of the structure of the stem delivery device.

[0060] Numbering on the map:

[0061] 1. Mounting box base; 2. Gate cavity; 3. Air separation device; 4. Weighing device; 5. Straw conveying device;

[0062] 11. Slot receiving port; 20. Gate plate; 21. Support frame; 22. Guide base plate; 23. Gate plate shaft; 24. Tilting mechanism; 231. Bearing; 232. Positioning end cover; 241. Cylinder I; 242. Connecting block; 243. Connecting rod; 244. Connecting rod pin; 25. Small guide plate;

[0063] 30 Suspension separation chamber; 31 Suction tube; 32 Vacuum generator; 33 Pipeline;

[0064] 40 Weighing spoon; 41 Cantilever sensor; 42 Support arm; 420 Connecting pin; 43 Tilting arm; 44 Weighing base plate; 46 Signal amplifier; 47 Sensor connector; 450 Cylinder II; 451 Joint bearing; 452 Cylinder pin; 453 Inner positioning seat; 454 Outer positioning sleeve; 455 Level.

[0065] 51. Stalk collection hopper; 52. Negative pressure recovery pipeline. Detailed Implementation

[0066] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0067] This embodiment is an online measurement device for cantilever weighing of stem removal amount. In practical applications, this device is installed below the discharge port of the secondary air separation mechanism of the feeding strip machine.

[0068] Figure 1 The overall structure of this device is shown.

[0069] As a multi-functional device for real-time monitoring and online measurement of stem fibers and recycling of stem fibers, it mainly includes a mounting box 1 and a gate cavity 2 installed on it, an air separation device 3, a weighing device 4, and a stem label conveying device 5.

[0070] The top of the mounting box 1 is provided with a stem receiving port 11. When the tobacco stems and shreds of the secondary air separation mechanism fall down, they fall into the stem receiving port 11. The stem receiving port 11 is funnel-shaped and its lower end is connected to the gate cavity 2.

[0071] Figure 2 The structure of the gate cavity 2 is shown.

[0072] The gate cavity 2 includes a support frame 21 disposed on one side therein, a gate 20 installed in the cavity, a guide base plate 22 located at its bottom, and a gate shaft 23 installed between its side plates for installing the gate 20. The gate shaft 23 is connected to a flipping mechanism 24.

[0073] The gate 20 has an open working position and a closed working position under the action of the flipping mechanism 24, so that the tobacco stems and tobacco shreds falling into the gate cavity 2 enter the air separation device 3 under the guidance of the guide bottom plate 22 and the gate 20 respectively for the extraction and separation of tobacco shreds in the stem sticks, and enter the weighing device 4 for automatic measurement of stem stick flow.

[0074] The gate cavity 2 is fixed to the mounting base 1 by two support frames 21 on the same side.

[0075] The function of the guide plate 22 is to guide and redirect the vertically falling tobacco stems and shreds so that they enter the air separation device 3.

[0076] Through holes are provided on the bottom thickness direction of the two side plates of the gate cavity 2 for the installation of the air separation chamber.

[0077] Figure 3 The closed working position structure of the gate cavity 2 is shown.

[0078] The width of the gate 20 is exactly the same as the internal width of the gate cavity 2, which serves to close the gate.

[0079] When the gate 20 is in the open working position, the gate 20 is perpendicular to the horizontal plane, and the tobacco stems and shreds falling into the gate cavity 2 enter the air separation chamber under the action of the guide bottom plate 22 for extraction and separation of tobacco shreds from the stem sticks; when the gate 20 is in the closed working position, the angle between the gate 20 and the horizontal plane is at its maximum value, and the tobacco stems and shreds falling into the gate cavity 2 enter the weighing scoop 40 under the action of the inclined gate 20.

[0080] Figure 4 The mounting structure of the gate 20 and the flipping mechanism 24 is shown.

[0081] The flipping mechanism 24 includes a cylinder 1241, a connecting block 242, a connecting rod 243, and a connecting rod pin 244. The connecting block 242 and the connecting rod 243 are movably connected by the connecting rod pin 244. The shaft hole of the connecting rod 243 is inserted into the gate shaft 23 and connected to it. The gate shaft 23 is fixed between the two side plates of the gate cavity 2 by bearings 231 and positioning end caps 232 at both ends.

[0082] The flipping mechanism 24 also has different working positions corresponding to the gate 20. When the cylinder I241 extends to the limit position, the gate 20 is in close contact with the side wall of the gate cavity 2 and the gate 20 is in a fully open state. The falling tobacco stems and shreds fall into the stem-shred separation chamber by utilizing the inclined slope of the guide plate 22. When the cylinder I241 retracts back to the initial position, it drives the gate 20 on the gate shaft 23 to rotate counterclockwise, so that the upper edge of the gate 20 flips and fits against the inner end face of the rear plate of the gate cavity 2. The gate 20 is in a fully closed state, and the lower part of the gate cavity 2 is sealed. The falling tobacco stems and shreds are guided into the weighing scoop 40 by utilizing the inclined slope formed after the gate 20 is closed.

[0083] When the weighing is completed, the gate 20 will automatically reset under the action of the cylinder I241, so that the gate cavity 2 is fully open again.

[0084] In this embodiment, the cylinder I241 is a double-piston rod double-acting cylinder, and the bearing 231 is a deep groove ball bearing.

[0085] The cylinder I241 is equipped with upper and lower limit magnetic rings, which limit the opening and closing extreme positions of the gate 20. When the gate 20 fails to reach the working position, the magnetic ring emits an alarm signal.

[0086] A small guide plate 25 is installed on the back side of the gate 20, which covers the gate shaft 23 to prevent falling tobacco stems and shreds from falling onto the gate shaft 23.

[0087] Figure 5 The installation structure of the air separation device 3 is shown.

[0088] The air separation device 3 includes a suspension separation chamber 30 and a suction assembly. Its main function is to separate the tobacco stems and shreds that have passed through the gate chamber 2 into three parts. The extraction and reuse of the stems and shreds are completed by suspension air separation. By improving the structure and morphology of the air separation chamber and optimizing the fluid dynamics of the chamber structure, the separation effect is improved and the failure rate of clogging is reduced.

[0089] The suction assembly includes a suction pipe 31, a vacuum generator 32, and a pipe 33 connected in sequence. The vacuum generator 32 provides a separating airflow for the three-stage stem separation and stem suspension extraction.

[0090] The suspension separation chamber 30 has positioning rods fixed on both sides that are connected to the gate chamber 2. The ends of the positioning rods are provided with a 30° chamfer to facilitate insertion into the through hole and achieve quick engagement or disengagement with the gate chamber 2.

[0091] Optionally, an observation window is provided at the front end of the suspension separation chamber 30.

[0092] The suspension separation chamber 30 has a 30-degree inclined plate on the front wall. Simulation analysis shows that when the rectifier inclined plate is set, the suction airflow under negative pressure is more in line with the motion trend of the filament separation and suspension state.

[0093] Figure 6 The structure of the weighing device 4 is shown.

[0094] The main function of the weighing device 4 is to automatically sense and weigh the amount of locomotive scrap within a unit of time, collect data, and upload the data to the production guidance center platform, so as to make timely adjustments and comprehensive analysis to guide production operations through timed automatic sensing and weighing of locomotive scrap removal.

[0095] The weighing device 4 includes a weighing scoop 40, a support arm 42, and a cantilever sensor 41 connected thereto. The support arm 42 is rotatably mounted on a flipping arm 43. The lower end of the support arm 42 is connected to a drive mechanism, which rotates around the flipping arm 43 as an axis under the action of the drive mechanism, causing the weighing scoop 40 to flip to an inclined position.

[0096] The weighing device 4 is mounted on a weighing base plate 44, and the weighing base plate 44 is fixed on the mounting box 1.

[0097] The weighing spoon 40 and the cantilever sensor 41 are fixedly installed together by an L-shaped sensor connector 47.

[0098] The cantilever sensor 41 is connected to a signal amplifier 46, which is mounted on the upper end of the support arm 42. The signal amplifier 46 is an AUTODA TDA-02C weight transmitter signal amplifier.

[0099] The weighing spoon 40 has an asymmetrical structure that is wider at the top and narrower at the bottom, with its left and right sides tilted asymmetrically to facilitate the pouring of the weighed tobacco stems and shreds from the weighing spoon 40.

[0100] The weighing scoop 40 has two extreme working positions: a horizontal working position and a tilting working position. When it is in the horizontal working position, the cylinder II 450 extends to its maximum stroke. The tobacco stems and shreds are guided by the closed gate 20 into the weighing scoop 40 in the horizontal working position, where they are weighed by the cantilever sensor 41. The weighing information is then fed back to the production guidance center via the signal amplifier 46.

[0101] When the weighing scoop 40 is in the tilting working position, the cylinder II 450 extends to its minimum stroke. The cylinder rod retracts, and the rod end joint bearing 451, under the action of the connecting pin 420, drives the support arm 42 to rotate smoothly counterclockwise around the axis of the flipping arm 43 pin. When the cylinder rod retracts to its limit position, the weighing scoop 40 flips to its tilt limit position, and the weighed object falls into the stem and tobacco conveying device 5. At this time, the tobacco stems and shreds in the weighing scoop 40 have completed the tilting operation and are emptied.

[0102] Figure 7 The mounting structure of the cantilever sensor 41 is shown.

[0103] The cantilever sensor 41 is a single-point force sensor with a range of 1 kg.

[0104] One end of the cantilever sensor 41 is installed in the mounting slot of the sensor connecting frame 47, and the other end is fixed to the front end of the support arm 42. The overall installation structure is a lever structure: one end of the cantilever sensor 41 is fixed to the weighing spoon 40. By measuring the force of the tobacco stems and shreds inside the spoon on the sensor, the lever principle torque relationship is applied to convert it into a weight value, that is, cantilever weighing measurement.

[0105] Figure 8 The structure of the drive mechanism of the weighing device 4 is shown.

[0106] The drive mechanism includes a cylinder II450 and a spherical bearing 451 disposed at the front end of the cylinder II450. The spherical bearing 451 is connected to the lower end of the support arm 42 via a connecting pin 420.

[0107] The cylinder 11450 is fixed to the weighing base plate 44 by a cylinder pin 452 and a horizontal locking frame. The horizontal locking frame includes an inner positioning seat 453 and an outer positioning sleeve 454. A level 455 is provided on the inner positioning seat 453, and the level 455 is used to calibrate the accuracy of the cylinder's horizontal operation.

[0108] The cylinder I I450 is equipped with a pressure-adjusting quick-connect pipe connector.

[0109] The cylinder I I450 is equipped with left and right limiting magnetic rings to limit the extreme positions of the cylinder rod extension and retraction.

[0110] Figure 9 The structure of the stem delivery device 5 is shown.

[0111] The stem conveying device 5 includes a stem collection hopper 51 and a negative pressure recovery pipe 52. Its function is to discharge the separated stems and the stems weighed after falling into the pipe through the centralized negative pressure recovery pipe 52.

[0112] The hopper 51 for collecting stems is a centrally symmetrical quadrangular pyramidal structure.

[0113] At the connection between the negative pressure recovery pipe 52 and the stem collection hopper 51, the height of the stem collection hopper 51 relative to the upper component is reduced by cutting the radius and height of the negative pressure recovery pipe 52. The pipe forms a flat installation interface at the front end, and the length and width of the interface are half the diameter of the pipe, so that the hopper can be installed and disassembled quickly and easily.

[0114] Mounting base 1 is the reference component for the installation of all functional components in this embodiment, and all machined parts are fixed on mounting base 1.

[0115] The mounting base 1 includes a mounting frame side plate, a mounting frame rear plate, a mounting frame bottom plate, and feet. The mounting frame side plate is used for the installation and fixing of the gate cavity 2, and the mounting frame rear plate is used for the connection and fixing of the weighing device 4.

[0116] The side panels, rear panel, and bottom corner bends of the mounting frame are equipped with triangular rib support plates to improve the strength of the mounting frame.

[0117] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. An online measuring device for cantilever weighing sensors to determine the amount of stem removal, characterized in that: It includes a mounting base and a gate chamber, an air separation device, a weighing device, and a stalk conveying device installed thereon; The top of the mounting box is provided with a sticky tag receiving port, which is connected to the gate cavity; The gate cavity includes a support frame disposed on one side, a gate installed in the cavity, a guide base plate located at its bottom, and a gate shaft installed between its side plates for gate installation. The gate shaft is connected to a flipping mechanism. The gate has an open working position and a closed working position when the flipping mechanism is activated, so that the tobacco stems and tobacco shreds falling into the gate cavity enter the air separation device and the weighing device under the guidance of the guide base plate and the gate, respectively. The air separation device includes a suspension separation chamber and a suction assembly; The weighing device includes a weighing scoop, a support arm, and a cantilever sensor connected thereto. The support arm is rotatably mounted on a tilting arm, and the lower end of the support arm is connected to a drive mechanism. Under the action of the drive mechanism, the support arm rotates around the tilting arm as an axis, causing the weighing scoop to tilt. The stem conveying device includes a stem collection hopper and a negative pressure recovery pipeline; The flipping mechanism includes a cylinder I, a connecting block, a connecting rod, and a connecting rod pin. The connecting block and the connecting rod are movably connected by the connecting rod pin, and the connecting rod is connected to the gate shaft. The flipping mechanism also has different working positions corresponding to the gate. When the cylinder I extends to its limit position, the gate is close to the side wall of the gate cavity, and the gate is in a fully open state. The falling tobacco stems and shreds fall into the stem-shred separation chamber by utilizing the inclined slope of the guide plate. When the cylinder I retracts back to the initial position, it drives the gate on the gate shaft to rotate counterclockwise, causing the upper edge of the gate to flip and fit against the inner end face of the rear plate of the gate cavity. The gate is in a fully closed state, and the lower part of the gate cavity is sealed. The falling tobacco stems and shreds are guided into the weighing scoop by utilizing the inclined slope formed after the gate is closed. The weighing device is mounted on a weighing base plate, and the weighing base plate is fixed on the mounting box base. The weighing spoon and the cantilever sensor are fixedly installed together by an L-shaped sensor connector. The cantilever sensor is connected to a signal amplifier, which is installed on the upper end of the support arm. The drive mechanism includes cylinder II and a spherical bearing disposed at the front end of cylinder II. The spherical bearing is connected to the lower end of the support arm via a connecting pin. The cylinder II is fixed to the weighing base plate fixed to the mounting box by a cylinder pin and a horizontal locking bracket; The horizontal locking frame includes an inner positioning seat and an outer positioning sleeve. A level is provided on the inner positioning seat, which is used to calibrate the accuracy of the cylinder's horizontal operation.

2. The online measuring device for cantilever weighing sensor of stem removal quantity according to claim 1, characterized in that: The gate cavity is fixed to the side plate of the mounting box by two support frames; The gate shaft is fixed between the two side plates of the gate cavity by bearings and positioning end caps at both ends.

3. The online measuring device for cantilever weighing sensor of stem removal quantity according to claim 1, characterized in that: The suction assembly includes a suction tube, a vacuum generator, and a pipe connected in sequence.

4. The online measuring device for cantilever weighing sensor of stem removal quantity according to claim 1, characterized in that: The mounting base includes a mounting frame side plate, a mounting frame rear plate, a mounting frame bottom plate, and feet. The mounting frame side plate is used for the installation and fixing of the gate cavity, and the mounting frame rear plate is used for the connection and fixing of the weighing device.

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