Device and method for measuring filling value of cut tobacco or cut stem

Abstract

The invention discloses a device and method for measuring the filling value of tobacco shreds or cut stems. The device comprises a rack assembly, a film wrapping assembly, a negative pressure control assembly, a sealing assembly, a visual detection assembly and a touch screen. The rack assembly comprises a bottom plate, stand columns and a supporting plate. The device is characterized in that the wrapping film assembly comprises an elastic wrapping film, a feeding cylinder, an air exhaust hole and a positioning boss, and the sealing assembly comprises an automatic pressing mechanism, a fixing frame, a sealing column, a connecting plate, an annular groove, a radial vent hole and an axial vent hole; the elastic wrapping film is filled with tobacco shreds or stem shreds. A sample with a certain mass is wrapped by a specific elastic wrapping film, the internal pressure of the elastic wrapping film is pumped to a specified negative pressure value by adopting a negative pressure generator, the specified negative pressure value is kept for a specified time, the volume change of the elastic wrapping film before and after the specified time is measured, and then the filling value of the batch of cut tobacco or cut stem samples is calculated. And the wrapping shrinkage state of the tobacco shreds in the rolling process of the cigarette making machine on an industrial site is well simulated, and the actual filling capacity of the tobacco shreds can be reflected more truly.

Description

Technical Field

[0001] The invention relates to the technical field of determination and detection of filling values ​​of tobacco shreds or shredded stems, and in particular to a determination device and detection method for filling values ​​of tobacco shreds or shredded stems. Background Art

[0002] The filling value of tobacco cut tobacco or cut stems refers to the volume occupied by a unit mass of cigarette cut tobacco (expanded cut stems) under the continuous action of a certain time and a certain pressure. The current measurement of cut tobacco / cut stem filling value only simulates the resilience performance of cut tobacco / cut stems (i.e. the volume occupied) under the axial compression state of the cigarette, and does not fully consider the influence of cut tobacco / cut stems on the resilience performance under the radial stress state. The measuring device and detection method of the present invention are intended to fully simulate the axial and radial stress conditions of the cigarette for analysis and detection, and improve the shortcomings of the current detection method. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies in the prior art and to provide a device and a method for measuring the filling value of shredded tobacco or shredded stems, wherein a sample of a certain mass m is wrapped by a specific elastic wrapping film, a negative pressure generator is used to pump the internal pressure of the elastic wrapping film to a specified negative pressure value, and the pressure is maintained for a specified time, the inside of the wrapping film shrinks under the negative pressure state, so that the sample shrinks in volume under the action of the wrapping force, the volume change of the elastic wrapping film before and after the specified time is measured, and then the filling value of the batch of shredded tobacco or shredded stem samples is calculated by an algorithm, and the filling capacity is judged according to the size of the shrinkage volume, which well simulates the wrapping shrinkage state of shredded tobacco during the rolling process of an industrial cigarette-making machine and can more truly reflect the actual filling capacity of the shredded tobacco.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A device for measuring the filling value of shredded tobacco or shredded stems, comprising a frame assembly (1), a wrapping film assembly (2), a negative pressure control assembly (3), a sealing assembly (4), a visual detection assembly (5), and a touch screen (6); the frame assembly comprises a base plate (11), a column (12), and a support plate (13); the support plate is mounted on the base plate via two columns; the wrapping film assembly, the negative pressure control assembly, and the sealing assembly are mounted on the support plate; and the visual detection assembly and the touch screen are mounted on the base plate; the device is characterized in that: the wrapping film assembly (2) comprises an elastic wrapping film (21), a feed barrel (22), an air extraction hole (23), and a positioning boss (24); the upper end of the elastic wrapping film is sealed and fixed to the lower end of the feed barrel; a trumpet-shaped feed port is provided at the upper end of the feed barrel; a radial air extraction hole is provided in the middle of the feed barrel; a positioning boss 24 is provided on the feed barrel and below the air extraction hole; the positioning boss is positioned and matched with the mounting hole of the support plate so that the lower end of the feed barrel is embedded in the mounting hole; and the elastic wrapping film is filled with shredded tobacco or shredded stems.

[0006] Furthermore, the sealing assembly (4) comprises an automatic pressing mechanism (41), a fixing frame (42), a sealing column (43), a connecting plate (44), an O-ring (45), an annular groove (46), a radial vent hole (47), an axial vent hole (48), and a spherical arc surface (49). The sealing column is fixedly mounted on the automatic pressing mechanism via the connecting plate, and the automatic pressing mechanism is fixedly mounted on the supporting plate via the fixing frame. An annular groove and radial vent holes are provided on the outer circumference of the sealing column. A plurality of radial vent holes are connected to the exhaust holes via the annular groove. A sealing groove is provided on the outer circumference of the sealing column. An O-ring is installed in the sealing groove. The O-ring is respectively arranged at the upper and lower ends of the annular groove. An axial vent hole is provided in the sealing column. The axial vent hole is respectively connected to the radial vent hole and the spherical inner cavity of the elastic wrapping membrane. A spherical arc surface is provided on the lower end surface of the sealing column. The diameter of the spherical arc surface is substantially the same as the diameter of the sphere of the elastic wrapping membrane.

[0007] Furthermore, the negative pressure control component (3) comprises a negative pressure generator (31), a three-way valve (32), a pressure detector (33), and a three-way joint (34); the negative pressure generator is connected to the three-way joint via the three-way valve, the three-way joint is connected to the pressure detector, and the three-way joint is connected to the air extraction hole via an air pipe.

[0008] Furthermore, the visual detection component (5) comprises a binocular camera (51), a camera mounting frame (52), and a reference plate (53). Two camera mounting frames are provided and are respectively installed on both sides of the support plate. Two binocular cameras are installed on each camera mounting frame. The four binocular cameras are symmetrically arranged about the elastic wrapping film (21) or the support plate. The binocular cameras are used to measure the volume of the elastic wrapping film. The reference plate is used to isolate the contents captured by the binocular cameras on both sides of the support plate to facilitate algorithm splicing. The reference plate is used as a reference for calculating the volume of the binocular cameras on both sides.

[0009] Furthermore, the elastic wrapping membrane (21) is a balloon-shaped hollow sphere with a neck at the upper part, the material of the elastic wrapping membrane is an elastic material with an elastic modulus of a certain value E, the elastic material is latex or rubber, and the outer diameter of the trumpet-shaped feed port at the upper end of the feed barrel is larger than the diameter of the necking part of the elastic wrapping membrane.

[0010] Furthermore, the automatic pressing mechanism (41) is a telescopic cylinder or a motor-screw-slider mechanism. When the automatic pressing mechanism drives the sealing column (43) to be in an ascending state, tobacco shreds or stem shreds are added into the elastic wrapping film through the trumpet-shaped feed port.

[0011] A detection method for a device for measuring filling value of cut tobacco or cut stems, comprising the following steps:

[0012] S1: setting the pressure P0 and the holding time T0 parameters on the touch screen, the sealing column (43) is in an ascending state, a tobacco or stem sample of a certain weight m is added into the elastic wrapping film (21) through the trumpet-shaped feed port at the upper end of the feed cylinder, and then starting the measuring device;

[0013] S2: The automatic pressing mechanism drives the sealing column (43) to fall to a predetermined position, thereby achieving sealing inside the elastic wrapping film;

[0014] S3: The negative pressure generator (31) is turned on to pump the pressure inside the elastic wrapping film to a certain pressure P0, the three-way valve is switched, and the negative pressure inside the elastic wrapping film is maintained. When the pressure reaches P0, the binocular cameras (51) on both sides of the support plate take pictures, and the volume V0 of the elastic wrapping film at this time is obtained through an image processing algorithm;

[0015] S4: After the pressure holding time T0, the binocular cameras on both sides take pictures again, and the volume V1 of the elastic wrapping film at this time is obtained through the algorithm;

[0016] Use the formula to calculate the fill value:

[0017]

[0018] Where: d—filling value, cm 3 / g

[0019] V0—Volume of elastic wrapping film before shrinkage, cm 3

[0020] V1—Volume of elastic wrapping film after shrinkage, cm 3

[0021] m—mass of tobacco, g.

[0022] The present invention provides a measuring device and a detection method for the filling value of shredded tobacco or shredded stems. The device wraps a sample of a certain mass m with a specific elastic wrapping film, uses a negative pressure generator to pump the internal pressure of the elastic wrapping film to a specified negative pressure value, and maintains it for a specified time. The inside of the wrapping film shrinks under the negative pressure state, so that the sample shrinks in volume under the action of the wrapping force, and the volume change of the elastic wrapping film before and after the specified time is measured. Then, the filling value of the batch of shredded tobacco or shredded stem samples is calculated by an algorithm, and the filling capacity is judged according to the size of the shrinkage volume. The device well simulates the wrapping shrinkage state of shredded tobacco during the rolling process of an industrial cigarette-making machine, and can more truly reflect the actual filling capacity of shredded tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a device for measuring filling value of cut tobacco or cut stems according to the present invention from a first viewing angle;

[0024] Figure 2It is a schematic structural diagram of the second viewing angle of the device for measuring the filling value of shredded tobacco or shredded stems of the present invention;

[0025] Figure 3 It is a partial cross-sectional structural schematic diagram of a device for measuring filling value of shredded tobacco or shredded stems according to the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the wrapping membrane assembly and the sealing column of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the negative pressure control component of the present invention.

[0028] In the figure: frame assembly 1, base plate 11, column 12, support plate 13; wrapping film assembly 2, elastic wrapping film 21, feed cylinder 22, exhaust hole 23, positioning boss 24; negative pressure control assembly 3, negative pressure generator 31, three-way valve 32, pressure detector 33, three-way joint 34; sealing assembly 4, automatic pressing mechanism 41, fixing frame 42, sealing column 43, connecting plate 44, O-ring 45, annular groove 46, radial vent 47, axial vent 48, spherical arc surface 49; visual detection assembly 5, binocular camera 51, camera mounting frame 52, reference plate 53; touch screen 6. DETAILED DESCRIPTION

[0029] In order to make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present invention, which are only used to explain the present invention, not to limit the present invention. It should be noted that, for the convenience of description, only the parts / structures related to the present invention are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention should be the common meanings understood by ordinary technicians in the field to which the present invention belongs.

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] like Figure 1-5As shown, a device for measuring the filling value of cut tobacco or cut stems comprises a frame assembly 1, a wrapping film assembly 2, a negative pressure control assembly 3, a sealing assembly 4, a visual detection assembly 5, and a touch screen 6. The frame assembly 1 comprises a bottom plate 11, a column 12, and a support plate 13. The support plate 13 is mounted on the bottom plate 11 through two columns 12. The wrapping film assembly 2, the negative pressure control assembly 3, and the sealing assembly 4 are mounted / connected to the support plate 13. The visual detection assembly 5 and the touch screen 6 are mounted on the bottom plate 11. The invention is characterized in that: the wrapping film assembly 2, the negative pressure control assembly 3, and the sealing assembly 4 are mounted / connected to the support plate 13. The visual detection assembly 5 and the touch screen 6 are mounted on the bottom plate 11. The wrapping assembly 2 includes an elastic wrapping film 21, a feed barrel 22, an exhaust hole 23, and a positioning boss 24. The upper end of the elastic wrapping film 21 is sealed and fixed to the lower end of the feed barrel 22. A trumpet-shaped feed port is provided at the upper end of the feed barrel 22. A radial exhaust hole 23 is provided in the middle of the feed barrel 22. A positioning boss 24 is provided on the feed barrel 22 and below the exhaust hole 23. The positioning boss 24 is positioned and matched with the mounting hole of the support plate 13 so that the lower end of the feed barrel 22 is embedded in the mounting hole. The elastic wrapping film 21 is filled with tobacco shreds or stem shreds.

[0033] The sealing assembly 4 includes an automatic pressing mechanism 41, a fixing frame 42, a sealing column 43, a connecting plate 44, an O-ring 45, an annular groove 46, a radial vent hole 47, an axial vent hole 48, and a spherical arc surface 49. The sealing column 43 is fixedly mounted on the automatic pressing mechanism 41 through the connecting plate 44, and the automatic pressing mechanism 41 is fixedly mounted on the supporting plate 13 through the fixing frame 42. The outer peripheral surface of the sealing column 43 is provided with an annular groove 46 and radial vent holes 47. A plurality of radial vent holes 47 are provided through the connecting plate 44. The annular groove 46 is connected with the exhaust hole 23. A sealing groove is provided on the outer peripheral surface of the sealing column 43. An O-ring 45 is installed in the sealing groove. The O-ring 45 is respectively arranged at the upper and lower ends of the annular groove 46. An axial vent hole 48 is provided in the sealing column 43. The axial vent hole 48 is respectively connected with the radial vent hole 47 and the spherical inner cavity of the elastic wrapping membrane 21. A spherical arc surface 49 is provided on the lower end surface of the sealing column 43. The diameter of the spherical arc surface 49 is substantially the same as the diameter of the sphere of the elastic wrapping membrane 21.

[0034] The negative pressure control component 3 includes a negative pressure generator 31, a three-way valve 32, a pressure detector 33, and a three-way joint 34. The negative pressure generator 31 is connected to the three-way joint 34 through the three-way valve 32. The three-way joint 34 is connected to the pressure detector 33, and the three-way joint 34 is connected to the air extraction hole 23 through an air pipe.

[0035] The visual inspection component 5 includes a binocular camera 51, a camera mounting frame 52, and a reference plate 53. Two camera mounting frames 52 are provided and are respectively installed on both sides of the support plate 13. Two binocular cameras 51 are installed on each camera mounting frame 52. The four binocular cameras 51 are symmetrically arranged about the elastic wrapping film 21 or the support plate 13. The binocular camera 51 is used to measure the volume of the elastic wrapping film 21. The reference plate 53 is used to isolate the shooting contents of the binocular cameras 51 on both sides of the support plate 13 to facilitate algorithm splicing. The reference plate 53 is used as a reference benchmark for calculating the volume of the binocular cameras 51 on both sides.

[0036] The elastic wrapping membrane 21 is a balloon-shaped hollow sphere with a neck at the upper part. The material of the elastic wrapping membrane 21 is an elastic material with an elastic modulus of a certain value E, which can be latex, rubber or other elastic materials. The outer diameter of the trumpet-shaped feed port at the upper end of the feed barrel 22 is larger than the diameter of the necked part of the elastic wrapping membrane 21.

[0037] The automatic pressing mechanism 41 is a telescopic cylinder or a motor-screw-slider mechanism. When the automatic pressing mechanism 41 drives the sealing column 43 to rise, tobacco or stem shreds are added into the elastic wrapping film 21 through the trumpet-shaped feed port.

[0038] A detection method for a device for measuring filling value of cut tobacco or cut stems, comprising the following steps:

[0039] S1: Set the parameters such as pressure P0 and holding time T0 on the touch screen 6, the sealing column 43 is in the ascending state, and a certain weight m of tobacco or stem sample is added into the elastic wrapping film 21 through the trumpet-shaped feeding port at the upper end of the feeding cylinder 22, and then start the measuring device;

[0040] S2: The automatic pressing mechanism 41 drives the sealing column 43 to fall to a predetermined position, so as to achieve internal sealing of the elastic wrapping film 21;

[0041] S3: The negative pressure generator 31 is turned on to pump the pressure inside the elastic wrapping film 21 to a certain pressure P0 (negative pressure P0), the three-way valve 32 is switched, and the negative pressure inside the elastic wrapping film 21 is maintained. When the pressure reaches P0, the binocular cameras 51 on both sides of the support plate 13 take pictures, and the volume V0 of the elastic wrapping film 21 at this time is obtained through the image processing algorithm;

[0042] S4: After the pressure holding time T0, the binocular cameras 51 on both sides take pictures again, and the volume V1 of the elastic wrapping film 21 at this time is obtained through an algorithm;

[0043] Use the formula to calculate the fill value:

[0044]

[0045] Where: d—filling value, cm 3 / g

[0046] V0—Volume of elastic wrapping film before shrinkage, cm 3

[0047] V1—Volume of elastic wrapping film after shrinkage, cm 3

[0048] m—mass of tobacco, g.

[0049] The present invention provides a measuring device and a detection method for the filling value of shredded tobacco or shredded stems. The device wraps a sample of a certain mass m with a specific elastic wrapping film, uses a negative pressure generator to pump the internal pressure of the elastic wrapping film to a specified negative pressure value, and maintains it for a specified time. The inside of the wrapping film shrinks under the negative pressure state, so that the sample shrinks in volume under the action of the wrapping force, and the volume change of the elastic wrapping film before and after the specified time is measured. Then, the filling value of the batch of shredded tobacco or shredded stem samples is calculated by an algorithm, and the filling capacity is judged according to the size of the shrinkage volume. The device well simulates the wrapping shrinkage state of shredded tobacco during the rolling process of an industrial cigarette-making machine, and can more truly reflect the actual filling capacity of shredded tobacco.

[0050] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for measuring the filling value of shredded tobacco or shredded stems, comprising a frame assembly (1), a wrapping film assembly (2), a negative pressure control assembly (3), a sealing assembly (4), a visual detection assembly (5), and a touch screen (6), wherein the frame assembly comprises a bottom plate (11), a column (12), and a support plate (13), wherein the support plate is mounted on the bottom plate via two columns, the wrapping film assembly, the negative pressure control assembly, and the sealing assembly are mounted on the support plate, and the visual detection assembly and the touch screen are mounted on the bottom plate; characterized in that: The wrapping film assembly (2) comprises an elastic wrapping film (21), a feed barrel (22), an exhaust hole (23), and a positioning boss (24); the upper end of the elastic wrapping film is sealed and fixed to the lower end of the feed barrel; a trumpet-shaped feed port is provided at the upper end of the feed barrel; a radial exhaust hole is provided in the middle of the feed barrel; a positioning boss 24 is provided on the feed barrel and below the exhaust hole; the positioning boss is positioned and matched with the mounting hole of the support plate so that the lower end of the feed barrel is embedded in the mounting hole; the elastic wrapping film is filled with tobacco shreds or stem shreds.

2. A device for measuring the filling value of shredded tobacco or shredded stems according to claim 1, characterized in that: The sealing assembly (4) comprises an automatic pressing mechanism (41), a fixing frame (42), a sealing column (43), a connecting plate (44), an O-type sealing ring (45), an annular groove (46), a radial vent hole (47), an axial vent hole (48), and a spherical arc surface (49). The sealing column is fixedly mounted on the automatic pressing mechanism via the connecting plate, and the automatic pressing mechanism is fixedly mounted on the supporting plate via the fixing frame. An annular groove and radial vent holes are provided on the outer circumference of the sealing column. A plurality of radial vent holes are connected to the exhaust holes via the annular groove. A sealing groove is provided on the outer circumference of the sealing column. An O-type sealing ring is installed in the sealing groove. The O-type sealing ring is respectively arranged at the upper and lower ends of the annular groove. An axial vent hole is provided in the sealing column. The axial vent hole is respectively connected to the radial vent hole and the spherical inner cavity of the elastic wrapping membrane. A spherical arc surface is provided on the lower end surface of the sealing column. The diameter of the spherical arc surface is substantially the same as the diameter of the sphere of the elastic wrapping membrane.

3. A device for measuring the filling value of shredded tobacco or shredded stems as claimed in claim 2, characterized in that: The negative pressure control component (3) comprises a negative pressure generator (31), a three-way valve (32), a pressure detector (33), and a three-way connector (34); the negative pressure generator is connected to the three-way connector via the three-way valve; the three-way connector is connected to the pressure detector; and the three-way connector is connected to the air extraction hole via an air pipe.

4. A device for measuring the filling value of shredded tobacco or shredded stems as claimed in claim 3, characterized in that: The visual inspection component (5) comprises a binocular camera (51), a camera mounting frame (52), and a reference plate (53). Two camera mounting frames are provided and are respectively installed on both sides of the support plate. Two binocular cameras are installed on each camera mounting frame. The four binocular cameras are symmetrically arranged about the elastic wrapping film (21) or the support plate. The binocular cameras are used to measure the volume of the elastic wrapping film. The reference plate is used to isolate the content captured by the binocular cameras on both sides of the support plate to facilitate algorithm splicing. The reference plate is used as a reference benchmark for the binocular cameras on both sides to calculate the volume.

5. A device for measuring the filling value of shredded tobacco or shredded stems as claimed in claim 4, characterized in that: The elastic wrapping film (21) is a balloon-shaped hollow sphere with a neck at the upper part. The material of the elastic wrapping film is an elastic material with an elastic modulus of a certain value E. The elastic material is latex or rubber. The outer diameter of the trumpet-shaped feed port at the upper end of the feed barrel is larger than the diameter of the neck of the elastic wrapping film.

6. A device for measuring the filling value of cut tobacco or cut stems according to claim 5, characterized in that: The automatic pressing mechanism (41) is a telescopic cylinder or a motor-screw-slider mechanism. When the automatic pressing mechanism drives the sealing column (43) to be in an ascending state, tobacco shreds or stem shreds are added into the elastic wrapping film through the trumpet-shaped feed port.

7. A method for measuring the filling value of cut tobacco or cut stems, comprising the measuring device according to claim 6, comprising the following steps: S1: setting the pressure P0 and the holding time T0 parameters on the touch screen, the sealing column (43) is in an ascending state, a tobacco or stem sample of a certain weight m is added into the elastic wrapping film (21) through the trumpet-shaped feed port at the upper end of the feed cylinder, and then starting the measuring device; S2: The automatic pressing mechanism drives the sealing column (43) to fall to a predetermined position, thereby achieving sealing inside the elastic wrapping film; S3: The negative pressure generator (31) is turned on to pump the pressure inside the elastic wrapping film to a certain pressure P0, the three-way valve is switched, and the negative pressure inside the elastic wrapping film is maintained. When the pressure reaches P0, the binocular cameras (51) on both sides of the support plate take pictures, and the volume V0 of the elastic wrapping film at this time is obtained through an image processing algorithm; S4: After the pressure holding time T0, the binocular cameras on both sides take pictures again, and the volume V1 of the elastic wrapping film at this time is obtained through the algorithm; Use the formula to calculate the fill value: Where: d—filling value, cm 3 / g V0—Volume of elastic wrapping film before shrinkage, cm 3 V1—Volume of elastic wrapping film after shrinkage, cm 3 m—mass of tobacco, g.

Images