Detection device and detection method for tobacco standard stick

Abstract

The present invention discloses a detection device and a detection method for a tobacco standard rod. The detection device includes a detection unit, a latex tube, a first vacuum generator, a first flow regulating device, a second flow regulating device and a switching valve. The detection unit includes a detection cavity. The detection cavity has an air inlet channel and a mounting cavity connected to the air inlet channel. The latex tube is arranged in the mounting cavity, and the inner cavity of the latex tube can be opened and closed to clamp or loosen the standard rod. The first vacuum generator is gaseously connected to the air inlet channel. The first flow regulating device and the second flow regulating device are arranged in parallel between the first vacuum generator and the air inlet channel. The first port of the switching valve is connected to the first vacuum generator. The second port of the switching valve is connected to the first flow regulating device. The switching valve is actuated so that the first port can be selectively connected to the second port or the third port. The detection device of the present invention and the calibrated standard rod are used to calibrate the standard rod to be tested, thereby reducing the detection cost.

Description

Technical Field

[0001] The invention relates to a detection device and a detection method for a tobacco standard stick. Background Art

[0002] Draw resistance and ventilation are important quality indicators for cigarettes. To accurately test these, standard rods must be regularly sent to a standardization research center for calibration. This cycle takes nearly three months. To ensure production is not impacted during this period, multiple sets of standard rods are required, rotating through calibration cycles to maintain production cycles. Furthermore, the calibration cost of a single standard rod is high, so rotating multiple sets of standard rods increases production costs and management complexity.

[0003] Therefore, how to reduce the calibration cost of standard rods is an urgent problem to be solved.

[0004] It should be noted that the statements in this background technology section only provide background technology related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0005] The present invention provides a tobacco standard rod detection device and detection method, so as to reduce the detection cost of the standard rod.

[0006] A first aspect of the present invention provides a device for detecting a tobacco standard stick, comprising:

[0007] The detection unit includes a detection cavity having an air inlet channel and a mounting cavity communicated with the air inlet channel;

[0008] A latex tube is arranged in the installation cavity, and the inner cavity of the latex tube can be opened and closed to clamp or release the standard rod;

[0009] a first vacuum generator, connected to the air inlet passage;

[0010] A first flow regulating device and a second flow regulating device are provided in parallel between the first vacuum generator and the air inlet passage;

[0011] a first switching valve, wherein a first port of the first switching valve is connected to the first vacuum generator, a second port of the switching valve is connected to the first flow regulating device, and a third port of the first switching valve is connected to the second flow regulating device, the first switching valve being operable so that the first port thereof can selectively communicate with the second port thereof or the third port thereof; and

[0012] The second switching valve, the first port of the second switching valve is connected to the second vent of the first flow regulating device, the second port of the second switching valve is connected to the second vent of the second flow regulating device, the third port of the second switching valve is connected to the intake passage, and the second switching valve operates so that its third port can be selectively connected to its second port or first port.

[0013] In some embodiments, the first flow regulating device comprises a mass flow controller; and / or, the second flow regulating device comprises a constant flow orifice device.

[0014] In some embodiments, the detection device further includes a second vacuum generator, which is used to control the opening and closing of the latex tube.

[0015] In some embodiments, the latex tube includes a first latex tube and a second latex tube that are spaced apart in the extending direction of the standard rod, and the first latex tube and the second latex tube jointly clamp the standard rod.

[0016] In some embodiments, the detection device further includes a suction resistance sensor, the end of the standard rod is connected to the air inlet channel through an intermediate air path, and the suction resistance sensor is in gas communication with the intermediate air path.

[0017] In some embodiments, the detection device further includes a ventilation sensor, which is in gas communication with the installation cavity.

[0018] In some embodiments, a limiting surface is provided at one end of the installation cavity close to the air inlet channel, and the limiting surface is used to abut against the end of the standard rod to limit the standard rod, and the limiting surface is a conical surface.

[0019] In some embodiments, the detection device also includes a positioning ring cover arranged on the end face of the installation cavity, a pulling ear arranged on the positioning ring cover and a latex tube connecting sleeve connected to the positioning ring cover, the positioning ring cover has a positioning hole, the standard rod passes through the positioning hole and enters the installation cavity, the latex tube is sealed and installed in the latex tube connecting sleeve, and the pulling ear is configured to pull out the latex tube connecting sleeve under the pull of external force.

[0020] In some embodiments, the standard rod includes a resistance to suction standard rod or a ventilation standard rod.

[0021] A second aspect of the present invention provides a detection method based on the detection device of the above-mentioned tobacco standard stick, comprising the following steps:

[0022] Inserting a first verified standard rod into a latex tube and testing the suction resistance or ventilation degree of the rod to obtain a first value;

[0023] Inserting a second verified standard rod into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a second value;

[0024] placing the calibration rod to be tested into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a third value; and

[0025] The third value is calibrated according to the first value and the second value.

[0026] Based on the technical solution provided by the present invention, the detection device and the calibrated standard rod are used to calibrate the standard rod to be measured, so there is no need to send all the standard rods to the calibration center for calibration, thereby reducing the detection cost.

[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a detection device for a tobacco standard stick according to an embodiment of the present invention.

[0030] Figure 2 This is a three-dimensional structural diagram of a tobacco standard rod detection device according to an embodiment of the present invention.

[0031] Figure 3 for Figure 2 A front view of the detection unit of the detection device shown.

[0032] Figure 4 for Figure 3 The cross-sectional structure diagram of the detection unit in the BB direction is shown.

[0033] Figure 5 for Figure 2 A top view of the detection unit of the detection device shown.

[0034] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of the detection cavity shown.

[0035] Figure 7 for Figure 2 Schematic diagram of the structure of the laminar flow tube unit of the detection device shown. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0039] like Figure 1 and Figure 6As shown, an embodiment of the present invention provides a device for detecting a tobacco standard rod. The device for detecting a tobacco standard rod in this embodiment includes a detection unit 8, a latex tube, a first vacuum generator, a first flow regulating device 12, a second flow regulating device 13, a first switching valve 11, and a second switching valve 14. The detection unit 8 includes a detection cavity 81. The detection cavity 81 has an air inlet channel 811 and a mounting cavity 812 connected to the air inlet channel 811. The latex tube is disposed in the mounting cavity 812, and the inner cavity of the latex tube can be opened and closed to clamp or release the standard rod A. The first vacuum generator 1 is gaseously connected to the air inlet channel 811. The first flow regulating device 12 and the second flow regulating device 13 are disposed in parallel between the first vacuum generator 1 and the air inlet channel 811. The first port of the first switching valve 11 is connected to the first vacuum generator 1. The second port of the first switching valve 11 is connected to the first flow regulating device 12. The third port of the first switching valve 11 is connected to the second flow regulating device 13. The first switching valve 11 is operated so that the first port can selectively communicate with the second port or the third port. The first port of the second switching valve 14 is connected to the second vent port of the first flow regulating device 12, the second port of the second switching valve 14 is connected to the second vent port of the second flow regulating device 13, and the third port of the second switching valve 14 is connected to the intake passage 811. The second switching valve 14 is operated so that its third port can selectively communicate with its second port or the first port.

[0040] The tobacco standard rod detection device of the present embodiment controls gas flow by providing a first flow regulating device 12 and a second flow regulating device 13 connected in parallel. The first and second flow regulating devices 12, 13 are switched via a first switching valve 11 and a second switching valve 14. This allows different flow regulating devices to be selected to control gas flow according to different detection conditions, thereby improving the detection accuracy of the detection device of the present embodiment. The detection device and a verified standard rod are used to calibrate the standard rod to be tested, eliminating the need to send all standard rods to a calibration center for calibration, thereby reducing testing costs.

[0041] The first flow regulating device 12 and the second flow regulating device 13 include a constant flow element for generating a constant flow, specifically, for example, a constant flow element with an air flow rate of 17.5 ml / s. In some embodiments, the first flow regulating device 12 includes a mass flow controller.

[0042] In other embodiments, the second flow regulating device 13 includes a constant flow orifice device.

[0043] In some embodiments, the detection device further comprises a second vacuum generator 2. The second vacuum generator 2 is used to control the opening and closing of the latex tube.

[0044] In some embodiments, the latex tube includes a first latex tube 4 and a second latex tube 5 spaced apart in the extending direction of the standard rod A, and the first latex tube 4 and the second latex tube 5 jointly clamp the standard rod A. In this way, the standard rod A remains stable under the joint clamping of the first latex tube 4 and the second latex tube 5, thereby improving the accuracy of the detection.

[0045] In some embodiments, the detection device further includes a resistance-to-draw sensor 7. The end of the standard rod A is connected to the air inlet channel 811 via an intermediate air path. The resistance-to-draw sensor 7 is in gas communication with the intermediate air path.

[0046] In some embodiments, the detection device further includes a ventilation sensor 6, which is in air communication with the mounting cavity 812. Specifically, ventilation holes are provided on the sidewall of the standard rod A, and the ventilation sensor 6 is configured to communicate with the ventilation holes on the standard rod A to detect the ventilation of the standard rod A.

[0047] like Figure 6 In some embodiments shown, a limiting surface 8121 is provided at one end of the mounting cavity 812 close to the air inlet channel 811 . The limiting surface 8121 is used to abut against the end of the standard rod to limit the standard rod. The limiting surface 8121 is a conical surface.

[0048] In some embodiments, the detection device also includes a positioning ring cover 801 arranged on the end face of the installation cavity 812, a pull ear 804 arranged on the positioning ring cover 801, and a latex tube connecting sleeve 808 connected to the positioning ring cover 801. The positioning ring cover 801 has a positioning hole, and the standard rod A passes through the positioning hole and enters the installation cavity 812. The latex tube is sealed and installed in the latex tube connecting sleeve 808. The pull ear 804 is configured to pull out the latex tube connecting sleeve 808 under the pull of external force.

[0049] like Figure 6 As shown, the latex tube connecting sleeve 808 is a cylindrical tubular structure, which includes a first tube segment threadedly connected to the positioning ring cover 801, a second tube segment clamped to the bottom end of the mounting cavity, and a first connecting strip and a second connecting strip connecting the first tube segment and the second tube segment. The first connecting strip and the second connecting strip both extend along the axial direction of the cylindrical tubular structure and are spaced apart in the circumferential direction of the cylindrical tubular structure, so that a gap is formed between the first connecting strip and the second connecting strip that is completely connected to the inner cavity of the cylindrical tubular structure. In this way, when the standard rod A passes through the positioning hole and extends into the latex tube connecting sleeve 808, at least part of the standard rod A is exposed in the above-mentioned gap, thereby achieving gas communication with the ventilation sensor 6 to realize the detection of ventilation. In some embodiments, the standard rod A includes a suction resistance standard rod or a ventilation standard rod.

[0050] like Figure 1 As shown, the detection device of the embodiment of the present invention further includes a manifold 3 , a constant flow cleaning switching valve 15 and a constant flow switching valve 14 .

[0051] like Figure 1 As shown, the first end of the first flow regulating device 12 is connected to the first switching valve 11, and the second end of the first flow regulating device 12 is connected to the second switching valve 14. The first end of the second flow regulating device 13 is connected to the first switching valve 11, and the second end of the second flow regulating device 13 is connected to the second switching valve 14. When the first flow regulating device 12 is used for constant flow control, the first switching valve 11 is controlled to the left position and the second switching valve 14 is controlled to the right position; when the second flow regulating device 13 is used, the first switching valve 11 is controlled to the right position and the second switching valve 14 is controlled to the right position. In other words, when the second switching valve 14 is in the left position, it cannot be connected to the detection unit air circuit.

[0052] The constant-flow cleaning switching valve 15 of the present embodiment is disposed between the second switching valve 14 and the detection unit 8. When the constant-flow cleaning switching valve 15 is in the left position, the detection unit 8 is connected to the air circuit to complete the detection. When the constant-flow cleaning switching valve 15 is in the right position, the clean air source flows to the detection unit 8 to clean the detection element.

[0053] The present invention also provides a method for detecting a tobacco standard rod according to the above embodiments, comprising the following steps:

[0054] Inserting a first verified standard rod into a latex tube and testing the suction resistance or ventilation degree of the rod to obtain a first value;

[0055] Inserting a second verified standard rod into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a second value;

[0056] placing the standard rod to be tested into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a third value; and

[0057] The third value is calibrated according to the first value and the second value.

[0058] The embodiment of the present invention utilizes the detection device and the verified standard rod to calibrate the standard rod to be detected, thus eliminating the need to send all the standard rods to a verification center for verification, thereby reducing detection costs.

[0059] like Figure 2 As shown, the detection device according to the embodiment of the present invention includes a chassis 10 , a detection unit 8 provided on the chassis 10 , and a laminar flow tube unit 9 provided in the chassis 10 .

[0060] like Figure 3As shown in the figure, the detection unit 8 includes a positioning cover ring 801, an opening ring 802, a pull ear 804, a detection cavity 81, a straight-through joint 806, a straight-through joint 807, a latex tube connecting sleeve 808, a sealing ring 809, a sealing ring 810, a sealing ring 812 and a detection port sheet metal component 813.

[0061] The positioning ring cover 801 is a circular flange structure as a whole. The pull ear 804 is connected to the positioning ring cover 801 via a pin shaft. There are limit slots at both ends of the pin shaft, and the retaining spring is assembled in the limit slots at both ends of the pin shaft to ensure that the pin shaft will not fall out. A positioning circular hole is set in the middle of the positioning ring cover 801, and the hole mouth of the circular hole is rounded. During operation, the standard rod is installed into the detection station through this hole. The other end of the positioning ring cover 801 has a threaded boss, and the positioning ring cover 801 is connected to the latex tube connecting sleeve 808 through a thread. The latex tube connecting sleeve 808 is a hollow cylindrical structure. One end of the latex tube connecting sleeve 808 is flat and a sealing ring 810 is assembled in its position. The other end has a circular groove, and the groove mouth has a thread connected to the positioning ring cover 801, and the bottom surface of the groove is another sealing sleeve. The assembly position of the ring 810, there are four annular grooves on the cylindrical outer surface of the latex tube connecting sleeve 808, and the sealing ring 812 is assembled in the annular groove. Two sealing rings 812 are a group, and there are two through grooves milled in the middle of the two groups of sealing rings 812. The through grooves are connected to the hollow part of the cylinder. On the other hand, there is a groove in the middle of each group of sealing rings 812 on the latex tube connecting sleeve 808, and a latex tube vent hole is drilled in the middle of the groove. The latex tube vent hole corresponds to the latex tube vent hole on the sealing ring 810, and each group of sealing rings 812 corresponds to one sealing ring 810 There are two sealing rings 810 in total. The sealing ring 810 is a cylinder, which is used to assemble the latex tube. There are three grooves on its cylindrical surface. The two grooves close to the end face are grooves for assembling the sealing ring, wherein the sealing ring 809 is assembled. The sealing ring 810 is assembled into the latex tube connecting sleeve 808 through the sealing ring 809. There is a latex tube vent in the middle groove, and its position corresponds to the through hole in each group of sealing rings 812 in the latex tube connecting sleeve 808. There are raised card grooves at both ends of the sealing ring 810. When assembling, the round crowns at both ends of the latex tube are specially installed. The card is stuck in the grooves at both ends of the sealing ring 810, and the surface of the latex tube 8 is kept clean and the sealing effect is good. During assembly, the latex tube connecting sleeve 808 is assembled into the detection cavity 81 through the four sealing rings 812 on the outer ring. There is an installation cavity in the middle of the detection cavity 81. The installation cavity is a cylindrical cavity. There is an air inlet hole on the bottom end face of the installation cavity. The air inlet end face of the air inlet hole is formed into a limiting surface abutting against the standard rod A. The limiting surface is set to a conical surface so that the detection device of the embodiment of the present invention is compatible with standard rods of different diameters.

[0062] The laminar flow tube unit 9 includes a flow stabilizing tube bracket 904 and a flow stabilizing tube pressing block 903. The flow stabilizing tube bracket 904 has a U-shaped slot, into which the laminar flow tube 901 is inserted. The flow stabilizing tube pressing block 903 then secures the laminar flow tube 901 to the flow stabilizing tube bracket 904 via bolts 902, thereby securing the laminar flow tube 901. The laminar flow tube 901 is connected to the ventilation sensor 6.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A tobacco standard rod detection device, characterized in that: include: A detection unit (8) comprising a detection cavity (81), wherein the detection cavity (81) has an air inlet channel (811) and a mounting cavity (812) communicating with the air inlet channel (811); A latex tube (4, 5) is arranged in the installation cavity (812), and the inner cavity of the latex tube (4, 5) can be opened and closed to clamp or release the standard rod (A); A first vacuum generator (1) is gas-connected to the air inlet channel (811); A first flow regulating device (12) and a second flow regulating device (13) are arranged in parallel between the first vacuum generator (1) and the air inlet passage (811); a first switching valve (11), wherein a first port of the first switching valve (11) is connected to the first vacuum generator (1), a second port of the first switching valve (11) is connected to a first vent of the first flow regulating device (12), a third port of the first switching valve (11) is connected to a first vent of the second flow regulating device (13), and the first switching valve (11) operates so that its first port can selectively communicate with its second port or its third port; and a second switching valve (14), wherein a first port of the second switching valve (14) is connected to the second vent port of the first flow regulating device (12), a second port of the second switching valve (14) is connected to the second vent port of the second flow regulating device (13), a third port of the second switching valve (14) is connected to the intake passage (811), and the second switching valve (14) is operated so that its third port can selectively communicate with its second port or its first port; The detection device further comprises a second vacuum generator (2), the second vacuum generator (2) being used to control the opening and closing of the latex tube, the latex tube comprising a first latex tube (4) and a second latex tube (5) spaced apart in the extending direction of the standard rod, the first latex tube (4) and the second latex tube (5) jointly clamping the standard rod (A); A limiting surface (8121) is provided at one end of the installation cavity (812) close to the air inlet channel (811), the limiting surface (8121) being used to abut against the end of the standard rod to limit the standard rod, and the limiting surface (8121) is a conical surface; The detection device also includes a positioning ring cover (801) arranged on the end face of the installation cavity (812), a pull ear (804) arranged on the positioning ring cover (801) and a latex tube connecting sleeve (808) connected to the positioning ring cover (801), the positioning ring cover (801) has a positioning hole, the standard rod (A) passes through the positioning hole and enters the installation cavity (812), the latex tube is sealed and installed in the latex tube connecting sleeve (808), and the pull ear (804) is configured to pull the latex tube connecting sleeve (808) out under the pull of an external force.

2. The tobacco standard rod detection device according to claim 1, characterized in that: The first flow regulating device (12) includes a mass flow controller (MFC); and / or the second flow regulating device (13) includes a constant flow orifice device (CFO).

3. The tobacco standard rod detection device according to claim 1, characterized in that: The detection device further comprises a resistance-to-draw sensor (7), the end of the standard rod (A) is connected to the air inlet channel (811) via an intermediate air path, and the resistance-to-draw sensor (7) is in gas communication with the intermediate air path.

4. The tobacco standard rod detection device according to claim 1, characterized in that: The detection device further comprises a ventilation sensor (6), wherein the ventilation sensor (6) is in gas communication with the installation cavity (812).

5. The tobacco standard rod detection device according to claim 1, characterized in that: The standard rod (A) includes a resistance to suction standard rod or a ventilation standard rod.

6. A detection method based on the detection device of any one of claims 1 to 5, characterized in that: The steps include: Inserting a first verified standard rod into the latex tube and testing the suction resistance or ventilation degree of the rod to obtain a first value; Inserting a second verified standard rod into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a second value; placing the calibration rod to be tested into the latex tube and testing the suction resistance or ventilation degree thereof to obtain a third value; and The third value is calibrated according to the first value and the second value.

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