A thick paste method sheet wet film thickness detection device

Abstract

The utility model relates to tobacco production technical field, concretely relates to a kind of thick pulp method sheet wet film thickness detection device;Including installation base component, thickness measuring adjustment component, first sensor and second sensor;The installation base component is used for bearing member, steel belt is provided thereon, and the steel belt is used to deliver wet film sheet;The thickness measuring adjustment component is installed on the installation base component;First sensor and second sensor are both installed on installation base component by the thickness measuring adjustment component, and are respectively used to detect the distance of measuring point distance wet film sheet and steel belt.The one in the first sensor and second sensor is laser sensor, and the other is laser sensor or eddy current sensor;Through the combined application of laser sensor and eddy current sensor, the thickness detection of non-contact type to thick pulp method wet film sheet is realized, effectively avoid the disturbance influence caused by contact measurement to wet film, improve the stability and reliability of measurement result.

Description

Technical Field

[0001] This utility model relates to the field of tobacco production technology, specifically to a device for detecting the thickness of wet film in a slurry-based thin sheet process. Background Technology

[0002] The main production processes for reconstituted tobacco include roller pressing, papermaking, dry processing, and slurry processing. In the slurry process, tobacco material is pulverized and then dissolved in an aqueous solution containing binders, reinforcing agents, humectants, and water. After thorough mixing, a slurry is formed and evenly spread onto a moving stainless steel belt using a slurry casting device. The slurry is then dried in an oven, and finally, a scraper peels off the dried film to form the finished tobacco sheet.

[0003] In the existing slurry-based sheet production process, a handheld roller-type sheet thickness gauge is used to measure the thickness of the wet film sheet. However, this method has low measurement accuracy, cannot capture subtle changes in sheet thickness, and has a low testing frequency, making it difficult to monitor changes in wet film sheet thickness in real time during slurry pouring. Therefore, a lag in wet film sheet thickness adjustment is unavoidable. Consequently, sheet thickness control is unstable, and thickness consistency is poor, leading to significant fluctuations in the moisture content of the finished sheet and affecting the stability of heated cigarette smoking quality. Furthermore, inconsistent sheet thickness reduces the sheet's processing resistance, affecting the yield of shredded sheets in subsequent shredding processes and the quality of heated cigarette rolling.

[0004] In view of the above, in order to overcome the above technical problems, this utility model designs a wet film thickness detection device for slurry method thin film, which solves the above technical problems. Summary of the Invention

[0005] The technical objective of this invention is to provide a wet film thickness detection device for slurry-based thin films, which solves the problem that the sensor detection results are easily affected by installation errors and positional deviations during the existing wet film thickness detection process, resulting in insufficient measurement accuracy.

[0006] To achieve the above-mentioned technical objectives, this utility model provides the following technical solution: This utility model provides a wet film thickness detection device for slurry-based thin films, including a mounting base assembly, a thickness adjustment assembly, a first sensor, and a second sensor. The mounting base assembly is used to support the components, and a steel belt is provided on it for conveying the wet film. The thickness adjustment assembly is mounted on the mounting base assembly. The first sensor and the second sensor are both mounted on the mounting base assembly through the thickness adjustment assembly, and are used to detect the distance of the measuring point from the wet film and the steel belt, respectively.

[0007] Preferably, one of the first sensor and the second sensor is a laser sensor, and the other is a laser sensor or an eddy current sensor.

[0008] On the one hand, and more preferably, both the first sensor and the second sensor are laser sensors, and the first sensor and the second sensor are located above and below the wet film sheet to be tested, respectively.

[0009] Furthermore, the thickness measurement adjustment assembly includes an X-axis adjustment displacement stage, a Y-axis adjustment displacement stage, a Z-axis adjustment screw, and a θ-rotation displacement stage. The X-axis adjustment displacement stage is mounted on the mounting base assembly and located above the steel strip; the Y-axis adjustment displacement stage is mounted on the mounting base assembly and located below the steel strip; the X-axis and Y-axis adjustment displacement stages are used to adjust the X-axis position of the upper first sensor and the Y-axis position of the lower second sensor, respectively; the Z-axis adjustment screw adjusts the Z-axis position of the two laser sensors respectively through lead screw movement; and the θ-rotation displacement stage is used to adjust the angle between the first and second sensors and the steel strip.

[0010] Preferably, the thickness measurement adjustment assembly further includes a centering calibration plate, which is detachably disposed between the two laser sensors and used to calibrate the centering position of the upper and lower laser sensors.

[0011] On the other hand, preferably, the first sensor is a laser sensor and the second sensor is an eddy current sensor, both of which are disposed above the wet film sheet to be tested.

[0012] The thickness measurement adjustment component includes a height adjustment mechanism and an angle adjustment mechanism, used to adjust the installation height and tilt angle of the first sensor and the second sensor.

[0013] Preferably, the angle adjustment mechanism is used to make the measuring axes of the first sensor and the second sensor perpendicular to the surface of the steel strip.

[0014] The wet film sheet is a wet film tobacco sheet coated on a stainless steel strip during the production of reconstituted tobacco using the slurry method.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model uses a steel strip mounted on a mounting base assembly, along with a first sensor and a second sensor mounted on a thickness adjustment assembly, to detect the distance between the wet film sheet and the steel strip, thereby obtaining the wet film thickness in real time. Furthermore, the combined application of a laser sensor and an eddy current sensor enables non-contact, high-precision thickness detection of wet film sheets produced by the slurry method, effectively avoiding the disturbance caused by contact measurement and improving the stability and reliability of the measurement results.

[0016] 2. By setting up an X-axis adjustment stage, a Y-axis adjustment stage, a Z-axis adjustment screw, and a θ-rotation stage, the spatial position and angle of the upper and lower sensors can be adjusted independently; the sensor measurement position can also be flexibly corrected according to the running state of the steel strip and the difference in sheet thickness to ensure that the measurement axis is perpendicular to the surface of the steel strip, thereby improving the consistency and repeatability of thickness detection.

[0017] 3. By setting a detachable alignment calibration plate between the upper and lower sensors, sensor alignment calibration can be performed before equipment operation or periodically; this can eliminate installation deviations and angular errors between sensors, ensure a unified thickness calculation benchmark, and further improve the accuracy of thickness measurement and the long-term stability of the system. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which: Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the installation position of the laser sensors arranged vertically in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the measurement in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 5 This is a measurement schematic diagram of Embodiment 2 of this utility model.

[0020] In the diagram: 1. Mounting base assembly; 2. First sensor; 3. Second sensor; 4. X-axis adjustment stage; 5. Y-axis adjustment stage; 6. Z-axis adjustment screw; 7. θ-axis rotary stage; 8. Centering calibration plate; 9. Height adjustment mechanism; 10. Angle adjustment mechanism; 11. Steel belt; 12. Wet film sheet. Detailed Implementation

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] Example 1: like Figures 1 to 3As shown, this embodiment provides a wet film thickness detection device for tobacco sheets produced using a slurry method. The device includes a mounting base assembly 1, a first sensor 2, a second sensor 3, an X-axis adjustment stage 4, a Y-axis adjustment stage 5, a θ-axis rotation stage 7, a Z-axis adjustment screw 6, and a centering calibration plate 8. The mounting base assembly 1 supports the various detection and adjustment components and is equipped with a steel belt 11 for conveying the wet film sheet 12. Both the first sensor 2 and the second sensor 3 are laser sensors, respectively positioned above and below the wet film sheet 12 to detect the distances from the measuring point to the surface of the wet film sheet 12 and the surface of the steel belt 11.

[0023] The thickness measurement adjustment assembly includes an X-axis adjustment stage 4, a Y-axis adjustment stage 5, a Z-axis adjustment screw 6, and a θ-axis rotary stage 7. The X-axis adjustment stage 4 is mounted on the mounting base assembly 1 and located above the steel strip 11, used to adjust the X-axis position of the upper first sensor 2. The Y-axis adjustment stage 5 is mounted on the mounting base assembly 11 and located below the steel strip 11, used to adjust the Y-axis position of the lower second sensor 3. The Z-axis adjustment screw 6 adjusts the height position of the two laser sensors along the Z-axis via a lead screw mechanism. The θ-axis rotary stage 7 adjusts the angle between the measurement axes of the two laser sensors and the steel strip 11 to ensure that the sensor's measurement optical axis is perpendicular to the surface of the steel strip 11. In this embodiment, the X-axis adjustment stage 4 and the Y-axis adjustment stage 5 are both electrically operated guide rail structures; the Z-axis adjustment screw 6 and the θ-axis rotary stage 7 adopt a lead screw mechanism and a hinge structure, respectively, and are manually adjusted and locked. This achieves independent adjustment of the four axes (X, Y, Z, and θ), enabling high-precision alignment and calibration of the upper and lower laser sensors during equipment installation and calibration.

[0024] To achieve precise alignment of the sensors, a detachable alignment calibration plate 8 is placed between the two laser sensors. By calibrating the alignment calibration plate 8, the emission axes of the upper and lower sensors can be corrected, ensuring that the laser lines emitted by the two sensors completely overlap, and ensuring that the measurement point is located at the midpoint of the two laser sensors, thereby guaranteeing the accuracy and repeatability of the measurement results.

[0025] The working principle of this embodiment is as follows: When the steel strip 11 is not coated with any material, the distance between the two laser sensors is a constant d. The upper and lower sensors S1 and S2 measure their distances x1 and x2 to the surface of the steel strip 11, respectively. Then, the thickness t0 of the steel strip 11 satisfies the following relationship:

[0026] Where x1 and x2 are measured values, and d is a constant but unknown quantity. After the material is coated, the upper sensor S1 measures the distance to the coating surface as x1', and the lower sensor S2 measures the distance to the back of the coating as x2'. The coating thickness t can then be calculated using the following formula:

[0027] Therefore, the coating thickness t depends only on the detection data of the two sensors in the uncoated and coated states of the steel strip 11, which can realize real-time measurement and dynamic monitoring of the wet film thickness. The measurement process does not require adjustment of the sensor position, and has the advantages of high detection accuracy, fast response speed and good repeatability.

[0028] Example 2: The difference between this embodiment and Embodiment 1 is that the position and type of the sensors are adjusted. The first sensor 2 and the second sensor 3 are both set in the same direction above the wet film sheet 12 to be measured. By selecting the first sensor 2 as a laser sensor and the second sensor 3 as an eddy current sensor, this embodiment utilizes the advantages of laser ranging and eddy current ranging, and avoids the shortcomings of laser ranging and eddy current ranging.

[0029] like Figure 4 As shown, the thickness measurement adjustment assembly of this embodiment includes a height adjustment mechanism 9 and an angle adjustment mechanism 10, used to adjust the installation height and tilt angle of the first sensor 2 and the second sensor 3; wherein the angle adjustment mechanism 10 is used to make the measurement axes of the first sensor 2 and the second sensor 3 perpendicular to the surface of the steel strip 11; the angle adjustment mechanism 10 specifically adopts an adjustment mechanism that can achieve rotation or hinge movement by those skilled in the art, such as a gear mechanism; at the same time, the height adjustment mechanism 9 of this embodiment can specifically adopt a mechanism that can achieve vertical movement by those skilled in the art, including but not limited to a lead screw or slide rail mechanism.

[0030] like Figure 5 As shown, the thick slurry is coated onto the steel strip 11 after passing through the casting device to form a wet film tobacco sheet, thus realizing the thickness detection of the wet film tobacco sheet. The distance x1 from the sensor to the steel strip 11 is detected by the eddy current sensor, and the distance x2 from the sensor to the wet film tobacco sheet is obtained by the laser sensor. The difference between the two is used to calculate the actual thickness t of the wet film tobacco sheet, that is, the conversion formula is t=x1-x2.

[0031] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

[0032] Although one or more exemplary embodiments of this disclosure have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims.

[0033] The above description is merely illustrative of this disclosure, and modifications may be made to the present invention in light of the above detailed description. The terminology used in the appended claims should not be construed as limiting the present invention to the specific embodiments disclosed in the specification. Rather, the scope of the present invention will be fully defined by the appended claims, which will be interpreted according to established principles of claim interpretation.

Claims

1. A device for detecting the wet film thickness of thin films using a slurry method, characterized in that, include: Mounting base assembly (1) for supporting components, on which a steel belt (11) is provided for conveying wet film sheets (12). Thickness adjustment component is installed on the mounting base component (1); The first sensor (2) and the second sensor (3) are both mounted on the mounting base assembly (1) through the thickness adjustment assembly, and are used to detect the distance of the measuring point from the wet film sheet (12) and the steel strip (11), respectively; Among them, one of the first sensor (2) and the second sensor (3) is a laser sensor, and the other is a laser sensor or an eddy current sensor.

2. The wet film thickness detection device for slurry-based thin films according to claim 1, characterized in that, The first sensor (2) and the second sensor (3) are both laser sensors, and the first sensor (2) and the second sensor (3) are located above and below the wet film sheet (12) to be tested, respectively.

3. The wet film thickness detection device for slurry-based thin films according to claim 2, characterized in that, The thickness measurement adjustment assembly includes an X-axis adjustment displacement stage (4), a Y-axis adjustment displacement stage (5), a Z-axis adjustment screw (6), and a θ-rotation displacement stage (7). The X-axis adjustment displacement stage (4) is mounted on the mounting base assembly (1) and located above the steel strip (11). The Y-axis adjustment displacement stage (5) is mounted on the mounting base assembly (1) and located below the steel strip (11). The X-axis adjustment displacement stage (4) and the Y-axis adjustment displacement stage (5) are used to adjust the X-axis position of the upper first sensor (2) and the Y-axis position of the lower second sensor (3), respectively. The Z-axis adjustment screw (6) adjusts the Z-axis position of the two laser sensors respectively through the movement of the lead screw. The θ-rotation displacement stage (7) is used to adjust the angle between the first sensor (2) and the second sensor (3) and the steel strip (11).

4. The wet film thickness detection device for slurry-based thin films according to claim 3, characterized in that, It also includes a centering calibration plate (8), which is detachably disposed between the two laser sensors and is used to calibrate the centering position of the upper and lower laser sensors.

5. The wet film thickness detection device for slurry-based thin films according to claim 1, characterized in that, The first sensor (2) is a laser sensor, and the second sensor (3) is an eddy current sensor. Both the eddy current sensor and the laser sensor are positioned above the wet film sheet (12) to be tested.

6. The wet film thickness detection device for slurry-based thin films according to claim 5, characterized in that, The thickness measurement adjustment assembly includes a height adjustment mechanism (9) and an angle adjustment mechanism (10) for adjusting the installation height and tilt angle of the first sensor (2) and the second sensor (3).

7. The wet film thickness detection device for slurry-based thin films according to claim 6, characterized in that, The angle adjustment mechanism (10) is used to make the measuring axes of the first sensor (2) and the second sensor (3) perpendicular to the surface of the steel strip (11).

8. The wet film thickness detection device for slurry-based thin films according to any one of claims 1-7, characterized in that, The wet film sheet (12) is a wet film tobacco sheet coated on a stainless steel strip (11) during the production of reconstituted tobacco using the slurry method.

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