Thermocouple positioning device and working method thereof

Abstract

The invention belongs to the field of tobacco temperature measurement, and provides a thermocouple positioning device and a working method thereof.The thermocouple positioning device comprises a first positioning piece and a second positioning piece, the second positioning piece is provided with a positioning groove, and the first positioning piece is clamped with the second positioning piece through the positioning groove; a plurality of positioning holes are formed in the surface of the first positioning piece, and different positioning holes are used for positioning different thermocouples at different axial positions and / or different circumferential positions relative to a to-be-detected cigarette; the surface of the second positioning piece is provided with a plurality of positioning parts with different depths, which are in one-to-one correspondence with the positions of the plurality of positioning holes, and the positioning parts with different depths are used for positioning different thermocouples at different radial positions relative to the cigarette to be detected. By adopting the thermocouple positioning device, the positioning precision can be controlled, random errors of positioning are eliminated, and measurement results of cigarettes in the same experimental batch and different batches have high repeatability.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco temperature measurement, and in particular to a thermocouple positioning device and a working method thereof. Background Art

[0002] As people's health awareness continues to improve, smokers have higher requirements for the quality of cigarettes, and also require a comfortable taste during the smoking process. The burning temperature of cigarettes is one of the most basic characteristic parameters affecting the quality of cigarettes. It directly affects the thermal decomposition and synthesis reaction of tobacco components after combustion, affects the amount of various volatile and semi-volatile components of cigarettes transported into the smoke, and is also closely related to the amount of harmful components in the smoke.

[0003] At present, thermocouples are usually used as temperature sensors to measure the temperature of internal points of cigarettes during the heating process or the smoking process, but thermocouples often do not have sufficient rigidity. In batch temperature testing of cigarettes, thermocouples are inserted into each section of the cigarette. Due to the obstruction of materials such as cigarette paper, acetate fiber in each section, and tobacco, it is difficult to insert the thermocouple smoothly and relatively accurately. In particular, the error in the insertion position (axial and radial position) will cause huge errors in the subsequent temperature data comparison, making it difficult to repeatedly and accurately locate the measurement point, resulting in very poor repeatability of the measurement results of the same experimental batch of cigarettes and different batches, and basically unable to obtain basic effective data. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a thermocouple positioning device and a working method thereof, so as to solve the above-mentioned problems. With the aid of the device, the positioning accuracy can be controlled and the random error of positioning can be eliminated.

[0005] According to some embodiments, a first solution of the present invention provides a thermocouple positioning device, which adopts the following technical solution:

[0006] A thermocouple positioning device comprises: a first positioning member and a second positioning member, wherein the second positioning member is provided with a positioning groove, and the first positioning member is engaged with the second positioning member through the positioning groove;

[0007] A plurality of positioning holes are arranged on the surface of the first positioning member, and different positioning holes are used to position different thermocouples at different axial positions and / or different circumferential positions relative to the cigarette to be tested;

[0008] The surface of the second positioning member is provided with a plurality of positioning parts of different depths corresponding to the positions of the plurality of positioning holes one by one, and the positioning parts of different depths are used to position different thermocouples at different radial positions relative to the cigarette to be tested.

[0009] Furthermore, the positioning portion includes a first positioning portion arranged near an end of the cigarette to be tested away from the heating device, and the thermocouple is positioned at the first positioning portion through a positioning hole to collect the temperature of the peripheral structure of the cigarette to be tested.

[0010] Furthermore, the positioning portion also includes a second positioning portion arranged inside the cigarette to be tested, and the thermocouple is positioned at the second positioning portion through a positioning hole to collect the temperature of the airflow channel inside the cigarette to be tested.

[0011] Furthermore, the cigarette to be tested includes an aerosol generating matrix section, a cooling section having a hollow structure, and a filtering section;

[0012] The thermocouple positioned at the second positioning portion is used to collect the internal temperature of the aerosol generating substrate segment, the hollow structure of the cooling segment and / or the filtering segment.

[0013] Furthermore, the positioning portion also includes a third positioning portion arranged near the heating device, and the thermocouple is positioned at the third positioning portion through a positioning hole to collect the temperature of the aerosol generating matrix segment or the heating device.

[0014] Furthermore, the positioning portion is a groove with different preset depths, and the collecting portion of the thermocouple is arranged at the bottom of the groove.

[0015] Furthermore, the thermocouple positioning device further comprises: a fixing member, which can be movably connected to the first positioning member and / or the second positioning member, and is used to clamp and fix the thermocouple;

[0016] The first positioning member has an L-shaped cross section and a notch is provided on the side. The fixing member cooperates with the notch to form a structure with a rectangular cross section.

[0017] Furthermore, the first positioning member and the second positioning member are integrally formed.

[0018] Furthermore, the heating device is a structure in the cigarette temperature measurement system for heating the cigarette to be tested.

[0019] According to some embodiments, a second solution of the present invention provides a working method of a thermocouple positioning device based on the first solution, using the following technical solution:

[0020] A working method of a thermocouple positioning device, comprising:

[0021] inserting a plurality of thermocouples sequentially into a plurality of positioning holes of the first positioning member;

[0022] The first positioning member with the thermocouple is clamped in the positioning groove of the second positioning member, and the depths of different thermocouples are adjusted so that a plurality of the thermocouples pass through the corresponding positioning holes and are positioned at the corresponding positioning parts;

[0023] The fixing piece is placed on the notch of the first positioning piece and movably connected thereto to complete the positioning of the thermocouple.

[0024] It can be seen from the above technical solution that the advantages and positive effects of the thermocouple positioning device proposed by the present invention are:

[0025] The present invention sets the thermocouple at an axial and / or circumferential position relative to the cigarette through the positioning hole of the first positioning member, cooperates with the positioning portion of the second positioning member to adjust the radial position of the thermocouple, and realizes accurate positioning of the thermocouple at a preset temperature measurement position. Furthermore, in the process of measuring the temperature of batches of cigarettes, the thermocouple can be directly positioned in the positioning portion through the positioning hole, so as to realize rapid resetting of the position of the thermocouple and improve the temperature measurement efficiency of batches of cigarettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above content and the following specific embodiments of the present invention will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection.

[0027] Figure 1 Schematic diagram of cigarette temperature test points in an embodiment of the present invention;

[0028] Figure 2 is an exploded view of a thermocouple positioning device in an embodiment of the present invention;

[0029] Figure 3 is a cross-sectional view of a thermocouple positioning device in an embodiment of the present invention;

[0030] Figure 4 is a structural diagram of a thermocouple positioning device in an embodiment of the present invention;

[0031] Figure 5 is an assembly diagram of a fixing member in an embodiment of the present invention;

[0032] Figure 6 is a cross-sectional view of a cigarette temperature measurement auxiliary device in an embodiment of the present invention;

[0033] The reference numerals are described as follows:

[0034] First positioning member 110; first positioning hole 111; second positioning hole 112; third positioning hole 113; rivet hole 1101; rivet 1102; second positioning member 120; first positioning portion 121; second positioning portion 122; third positioning portion 123; positioning groove 124; first thermocouple 131; second thermocouple 132; third thermocouple 133; fixing member 140; heating device 30; cigarette 40. DETAILED DESCRIPTION

[0035] The detailed features and advantages of the present invention are described in detail in the specific implementation modes below, and the contents are sufficient to enable any person skilled in the art to understand the technical contents of the present invention and implement them accordingly. Moreover, according to the description, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant objects and advantages of the present invention.

[0036] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Embodiment 1

[0040] This embodiment provides a thermocouple positioning device, which can be applied to a cigarette temperature measurement system. The cigarette temperature measurement system may include a heating device, a temperature acquisition device and a temperature recording device. The heating device is used to heat the cigarette to be tested, the temperature acquisition device is used to collect temperature data at different positions of the cigarette to be tested, and transmit the temperature data to the temperature recording device for storage, and the temperature recording device is used to analyze and process the temperature data. It can be understood that the heating device in the cigarette temperature measurement system includes but is not limited to a heating needle, and the heating needle is inserted into the cigarette to be tested for heating.

[0041] The temperature acquisition device may include a first thermocouple, a second thermocouple and a third thermocouple, wherein each thermocouple is respectively arranged at a corresponding temperature measurement position, for example, the first thermocouple is arranged at a first temperature measurement position, the second thermocouple is arranged at a second temperature measurement position, and the third thermocouple is arranged at a third temperature measurement position.

[0042] It can be understood that thermocouple sensors have a fast response speed, can detect temperature changes in real time, and can maintain a stable output signal under high temperature and harsh environment. They have high reliability and stability, and at the same time have high measurement accuracy and can accurately reflect the temperature of the object being measured.

[0043] For example, Figure 1As shown in the figure, when measuring the temperature of cigarettes in batches, the results of numerical simulation can be used for verification. In order to compare with the results of numerical simulation, it is necessary to measure the temperature of actual cigarettes to verify the correctness of numerical simulation and the accuracy of calculation.

[0044] The cigarette includes an aerosol generating matrix section (where n5-n7 are located), a cooling section with a hollow structure (where n3 and n4 are located), and a filtering section (where n1 and n2 are located).

[0045] The horizontal coordinate x and the vertical coordinate y corresponding to each temperature measurement position n1-n7 can be respectively:

[0046] n1: x = 47.2 mm, y = 0 mm;

[0047] n2: x=45.2mm, y=(3.65mm-1mm)=2.65mm;

[0048] n3: x=35.2mm, y=(3.65mm-1mm)=2.65mm;

[0049] n4: x=22.2mm, y=(3.65mm-1mm)=2.65mm;

[0050] n5: x=15.2mm, y=(3.65mm-2mm)=1.65mm;

[0051] n6: x=10.2mm, y=(3.65mm-1mm)=2.65mm;

[0052] n7: x=5.2mm, y=(3.65mm-1mm)=2.65mm.

[0053] It should be noted that n1 measures the temperature of the middle air flow channel of the filtration section, n2 measures the peripheral temperature of the filtration section, n3 measures the temperature of the internal air flow channel of the spiral cooling section, n4 measures the temperature of the peripheral air flow channel of the multi-porous cooling section, n5 measures the temperature near the heater, and n6 and n7 measure the temperature of the aerosol generation matrix section.

[0054] like Figure 2 , Figure 3 as well as Figure 4 The thermocouple positioning device of this embodiment may include a first positioning member 110 and a second positioning member 120. The second positioning member 120 is provided with a positioning groove 124. The first positioning member 110 is engaged with the second positioning member 120 through the positioning groove 124.

[0055] The surface of the first positioning member 110 is provided with a plurality of positioning holes, and different positioning holes are used to position different thermocouples at different axial positions and / or different circumferential positions relative to the cigarette to be tested;

[0056] The surface of the second positioning member 120 is provided with a plurality of positioning portions of different depths corresponding to the positions of the plurality of positioning holes. The positioning portions of different depths are used to position different thermocouples at different radial positions relative to the cigarette to be tested.

[0057] The positioning holes include a first positioning hole 111, a second positioning hole 112 and a third positioning hole 113, and correspondingly, the thermocouple includes a first thermocouple 131, a second thermocouple 132 and a third thermocouple 133;

[0058] The positioning part includes a first positioning part 121 arranged near the end of the cigarette to be tested away from the heating device, and the thermocouple is positioned at the first positioning part through a positioning hole to collect the temperature of the peripheral structure of the cigarette to be tested.

[0059] The positioning part also includes a second positioning part 122 arranged inside the cigarette to be tested, and the thermocouple is positioned in the second positioning part through a positioning hole to collect the temperature of the air flow channel inside the cigarette to be tested.

[0060] The positioning part also includes a third positioning part 123 arranged near the heating device, and the thermocouple is positioned at the third positioning part through a positioning hole for collecting the temperature of the aerosol generating matrix segment or the heating device.

[0061] A first positioning hole 111 and a second positioning hole 112 are provided on the surface of the first positioning member 110. The first positioning hole 111 is used to position the first thermocouple 131 at a first axial position and / or a first circumferential position relative to the cigarette 40 to be tested, and the second positioning hole 112 is used to position the second thermocouple 132 at a second axial position and / or a second circumferential position relative to the cigarette 40 to be tested.

[0062] The surface of the second positioning member 120 is provided with a first positioning portion 121 and a second positioning portion 122 corresponding to the first positioning hole 111 and the second positioning hole 112 respectively. The first positioning portion 121 is used to position the first thermocouple 131 at a first radial position relative to the cigarette 40 to be tested, and the second positioning portion 122 is used to position the second thermocouple 132 at a second radial position relative to the cigarette 40 to be tested.

[0063] The first thermocouple 131 passes through the first positioning hole 111 and is positioned in the first positioning portion 121 , and the second thermocouple 132 passes through the second positioning hole 112 and is positioned in the second positioning portion 122 .

[0064] The first positioning portion 121 is arranged near the cigarette 40 to be tested, and the first thermocouple 131 is used to collect the temperature of the peripheral structure of the cigarette 40 to be tested. The second positioning portion 122 is arranged inside the cigarette 40 to be tested, and the second thermocouple 132 is used to collect the temperature of the internal airflow channel of the cigarette 40 to be tested.

[0065] The first positioning member 110 also includes a third positioning hole 113, the second positioning member 120 also includes a third positioning portion 123 vertically corresponding to the third positioning hole 113, the temperature collection device also includes a third thermocouple 133, and the third positioning portion 123 is used to position the third thermocouple 133 at a third radial position relative to the cigarette 40 to be tested; the third positioning portion 123 is arranged near the heating device 30, the third thermocouple 133 passes through the third positioning hole 113, and is positioned in the third positioning portion 123, and is used to collect the temperature of the aerosol generating matrix segment or the heating device 30.

[0066] By acquiring a plurality of temperature data related to the heating of the cigarette 40 to be tested, it is convenient to subsequently analyze the specific heating process of the cigarette. At the same time, abnormal results can be screened out based on these temperature data to improve the accuracy of the cigarette temperature test.

[0067] It can be understood that the present application sets the thermocouple at an axial and / or circumferential position relative to the cigarette 40 through the positioning hole of the first positioning member 110, cooperates with the positioning portion of the second positioning member 120, adjusts the radial position of the thermocouple, and realizes accurate positioning of the thermocouple at a preset temperature measurement position. In the process of measuring the temperature of a batch of cigarettes 40, the thermocouple can be directly positioned in the positioning portion through the positioning hole, so as to realize rapid resetting of the position of the thermocouple and improve the temperature measurement efficiency of the batch of cigarettes 40.

[0068] The positioning part is a groove with different preset depths, and the collecting part of the thermocouple is arranged at the bottom of the groove.

[0069] The thermocouple positioning device 10 further includes: a fixing member 140, which can be movably connected to the first positioning member 110 and / or the second positioning member 120, and is used to clamp and fix the thermocouple;

[0070] The first positioning member 110 has an L-shaped cross section, with a notch provided on the side, and the fixing member cooperates with the notch to form a structure with a rectangular cross section.

[0071] like Figure 5 As shown, the surface of the first positioning member 110 may be provided with four rivet holes 1101, and the fixing member 140 is provided with four rivets 1102 corresponding to the rivet holes 1101, and the two cooperate to fix the temperature collection device.

[0072] It is understandable that the fixing member 140 can also be disposed on the surface of the first positioning member 110 by magnetic adsorption.

[0073] For example, the surfaces of the fixing member 140 and the first positioning member 110 may be covered with magnetic material, or the fixing member 140 and the first positioning member 110 may be made of magnetic material.

[0074] It should be noted that those skilled in the art can select appropriate magnetic materials according to specific application scenarios, and the relevant magnetic material content will not be repeated here.

[0075] The first positioning member 110 and the second positioning member 120 are integrally formed.

[0076] like Figure 5 and Figure 6 As shown, after the thermocouple positioning device 10 positions the thermocouple, the second positioning member 120 can be removed and replaced with the cigarette 40 and the heating device 30. During the assembly process, the thermocouple is inserted into the prefabricated hole on the cigarette 40.

[0077] Embodiment 2

[0078] This embodiment provides a working method of a thermocouple positioning device based on the first embodiment, including:

[0079] inserting a plurality of thermocouples sequentially into a plurality of positioning holes of the first positioning member;

[0080] The first positioning member with the thermocouple is clamped in the positioning groove of the second positioning member, and the depths of different thermocouples are adjusted so that a plurality of the thermocouples pass through the corresponding positioning holes and are positioned at the corresponding positioning parts;

[0081] The fixing piece is placed on the notch of the first positioning piece and movably connected thereto to complete the positioning of the thermocouple.

[0082] The terms and expressions used herein are for descriptive purposes only, and the present invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, variations and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0083] Similarly, it should be pointed out that although the present invention has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions may be made without departing from the spirit of the present invention. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present invention, they will fall within the scope of the claims of the present invention.

Claims

1. A thermocouple positioning device, characterized in that: include: a first positioning member and a second positioning member, wherein the second positioning member is provided with a positioning groove, and the first positioning member is engaged with the second positioning member through the positioning groove; A plurality of positioning holes are arranged on the surface of the first positioning member, and different positioning holes are used to position different thermocouples at different axial positions and / or different circumferential positions relative to the cigarette to be tested; The surface of the second positioning member is provided with a plurality of positioning parts of different depths corresponding to the positions of the plurality of positioning holes one by one, and the positioning parts of different depths are used to position different thermocouples at different radial positions relative to the cigarette to be tested.

2. The thermocouple positioning device according to claim 1, characterized in that: The positioning part includes a first positioning part arranged near the end of the cigarette to be tested away from the heating device, and the thermocouple passes through the positioning hole and is positioned at the first positioning part for collecting the temperature of the peripheral structure of the cigarette to be tested.

3. The thermocouple positioning device according to claim 1, characterized in that: The positioning part also includes a second positioning part arranged inside the cigarette to be tested, and the thermocouple is positioned at the second positioning part through a positioning hole to collect the temperature of the air flow channel inside the cigarette to be tested.

4. The thermocouple positioning device according to claim 3, characterized in that: The cigarette to be tested comprises an aerosol generating matrix section, a cooling section with a hollow structure, and a filtering section; The thermocouple positioned at the second positioning portion is used to collect the internal temperature of the aerosol generating substrate segment, the hollow structure of the cooling segment and / or the filtering segment.

5. The thermocouple positioning device according to claim 4, characterized in that: The positioning part also includes a third positioning part arranged near the heating device, and the thermocouple is positioned at the third positioning part through the positioning hole to collect the temperature of the aerosol generating matrix segment or the heating device.

6. The thermocouple positioning device according to claim 1, characterized in that: The positioning portion is a groove with different preset depths, and the collecting portion of the thermocouple is arranged at the bottom of the groove.

7. The thermocouple positioning device according to claim 1, characterized in that: The thermocouple positioning device also includes: A fixing member, which can be movably connected to the first positioning member and / or the second positioning member, and is used to clamp and fix the thermocouple; The first positioning member has an L-shaped cross section and a notch is provided on the side. The fixing member cooperates with the notch to form a structure with a rectangular cross section.

8. The thermocouple positioning device according to claim 1, characterized in that: The first positioning member and the second positioning member are integrally formed.

9. The thermocouple positioning device according to claim 2, characterized in that: The heating device is a structure in the cigarette temperature measurement system for heating the cigarette to be measured.

10. A working method of the thermocouple positioning device according to any one of claims 1 to 9, characterized in that: include: inserting a plurality of thermocouples sequentially into a plurality of positioning holes of the first positioning member; The first positioning member with the thermocouple is clamped in the positioning groove of the second positioning member, and the depths of different thermocouples are adjusted so that a plurality of the thermocouples pass through the corresponding positioning holes and are positioned at the corresponding positioning parts; The fixing piece is placed on the notch of the first positioning piece and movably connected thereto to complete the positioning of the thermocouple.

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