Sample preparation device and thermogravimetric analysis weighing equipment

Abstract

The utility model discloses a sample preparation device and thermogravimetric analysis weighing equipment. The sample preparation device comprises a bracket, a bearing disc and a sample container for accommodating a to-be-tested sample related to atomization equipment, the bearing disc comprises a limiting part and a connecting part, and the bearing disc is detachably connected to the support through the connecting part. The sample container is placed on the limiting part, and the limiting part is used for limiting the radial movement of the sample container. According to the sample preparation device, the bearing disc can be connected to the support for stable sample preparation, samples can be efficiently contained through the sample container, carbon deposits generated by the samples can be adsorbed in the sample container, therefore, the pollution problem is relieved, the sample container can be stably arranged on the bearing disc through the limiting part, and therefore sample preparation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of thermogravimetric analysis, in particular to a sample preparation device and thermogravimetric analysis weighing equipment. Background Art

[0002] Thermogravimetry analysis, abbreviated as Thermogravimetry Analysis (TG or TGA), is to place the sample under a certain temperature program (increase / decrease / constant temperature) to observe the change of the sample's mass with temperature or time. Thermogravimetry is widely used in research and development, process optimization and quality control in the fields of plastics, rubber, coatings, pharmaceuticals, catalysts, inorganic materials and composite materials. Thermogravimetry can be used to determine the thermal stability and oxidation stability of materials in different atmospheres, analyze the physicochemical processes such as decomposition, adsorption, desorption, oxidation and reduction, and quantitatively calculate the composition of the substance, and determine the content of water, volatile components and various additives and fillers.

[0003] In atomization devices, it is usually necessary to perform thermogravimetric analysis on fluffy samples such as cotton samples or liquid samples to understand their relevant properties. However, existing thermogravimetric analysis weighing solutions usually cannot stably and efficiently place liquid samples or fluffy samples on the weighing tray, which leads to unstable weighing and poor test results. In addition, liquid samples or cotton samples will also cause pollution problems due to carbon deposition during the test. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a sample preparation device and a thermogravimetric analysis weighing device in view of at least one defect of the related technology mentioned in the above background technology: the inability to prepare samples stably and efficiently and the pollution problem caused by the samples.

[0005] The technical solution adopted by the utility model to solve its technical problems is: constructing a sample preparation device, comprising: a bracket; a support tray, the support tray comprising a limiting portion and a connecting portion, the support tray being detachably connected to the bracket through the connecting portion; and a sample container for accommodating a sample to be tested related to an atomization device, the sample container being placed on the limiting portion, and the limiting portion being used to limit the radial movement of the sample container.

[0006] Preferably, in the sample preparation device described in the utility model, the tray further comprises a bottom plate, and the limiting portion is arranged at the center position of the bottom plate.

[0007] Preferably, in the sample preparation device described in the utility model, the limiting portion is a limiting baffle plate which is continuous in the circumferential direction of the chassis; or, the limiting portion includes at least two arc-shaped limiting baffle plates which are spaced opposite to each other in the circumferential direction of the chassis; the height of the limiting baffle plate is smaller than the height of the sample container; and the inner diameter enclosed by the limiting baffle plate is larger than the outer diameter of the sample container.

[0008] Preferably, in the sample preparation device of the present invention, the connecting portion is a strip-shaped body that extends obliquely from both sides of the bottom plate to the middle and is connected, and a bend is formed at the connection point.

[0009] Preferably, in the sample preparation device described in the present invention, the bracket comprises: a seat body; a rod body, a first end of the rod body is mounted on the seat body; a connector, a first end of the connector is mounted on a second end of the rod body, and the second end of the connector is detachably connected to the connecting portion.

[0010] Preferably, in the sample preparation device described in the present invention, the second end of the connector is a bending portion hooked with the bending position; or, the second end of the connector is a magnetic portion magnetically connected to the bending position.

[0011] Preferably, in the sample preparation device described in the utility model, the tray is a tray body made of a heat-conducting material, and the sample container is a body made of a heat-conducting material.

[0012] Preferably, in the sample preparation device described in the utility model, the sample container comprises a cover and a main body, and the main body is arranged on the limiting portion.

[0013] Preferably, in the sample preparation device described in the utility model, the sample container is a crucible.

[0014] The utility model also constructs a thermogravimetric analysis weighing device, including a balance, which is used for thermogravimetric analysis of samples to be tested related to an atomization device. The thermogravimetric analysis weighing device also includes a sample preparation device as described in any of the above items; the sample preparation device is detachably connected to the weighing end of the balance through a connecting portion on a supporting tray.

[0015] By implementing the utility model, the following beneficial effects are achieved:

[0016] The utility model can connect the tray to the bracket to perform stable sample preparation, and the sample can be efficiently loaded through the sample container, and the carbon deposits generated by the sample will also be adsorbed in the sample container, thereby reducing the pollution problem, and the sample container can be stably set on the tray through the limiting part, thereby completing the sample preparation.

[0017] In addition, when the tray of the sample preparation device is removed from the bracket and connected to a balance, the problem of unstable weighing can be effectively solved, thereby obtaining stable test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a structural schematic diagram of the bracket of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the support tray in some embodiments of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the sample container of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a supporting tray in some other embodiments of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure in which the bracket and the supporting tray are detachably connected in some embodiments of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure in which the bracket and the supporting tray are detachably connected in some other embodiments of the utility model;

[0025] Figure 7 It is a structural block diagram of the thermogravimetric analysis weighing device of the utility model;

[0026] Figure numerals: 100, thermogravimetric analysis weighing equipment; 10, sample preparation device; 20, balance; 1, bracket; 11, seat; 12, rod; 13, connector; 131a, bending portion; 131b, magnetic portion; 2, tray; 21, chassis; 22, limiting portion; 23, connecting portion; 231, bending position; 3, sample container; 31, cover; 32, main body. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "located at", and "located at" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0031] In the atomization industry, it is necessary to conduct thermogravimetric analysis on the materials of liquid samples, liquid guide parts and other components to understand their relevant properties. The first existing weighing scheme is to directly weigh and sample the sample with weighing paper, put it on the tray of the balance, and then put it into the test area in the furnace to start the test; the second existing scheme is to weigh and sample the fluffy sample, first use the sample preparation device of the test equipment to flatten the fluffy sample, then spread it flat on the tray of the balance, and finally put it into the test area in the furnace to start the test.

[0032] For the first weighing scheme, liquid samples and fluffy raw cotton, oil-conducting cotton, oil-storage cotton and other liquid-conducting materials cannot be stably placed on the tray, resulting in unstable weighing, and the samples will be heated unevenly during testing. For the second weighing scheme, using a sample preparation device is more cumbersome, and the uneven bottom of the sample preparation device will also cause the fluffy samples to be unable to be spread flat on the tray, which will also result in unstable weighing, and the samples will be heated unevenly during testing, affecting the test results. In addition, a certain amount of carbon deposits will be generated during the testing of liquid samples, raw cotton, etc., and due to the limited atmosphere flow rate, some large molecular carbon chains cannot be taken away in time and are adsorbed to the inner wall of the equipment furnace, causing pollution.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the utility model discloses a sample preparation device 10, comprising a support 1, a tray 2 and a sample container 3, specifically:

[0034] The tray 2 includes a limiting portion 22 and a connecting portion 23, and the tray 2 is detachably connected to the bracket 1 through the connecting portion 23. The sample container 3 is used to accommodate the sample to be tested related to the atomization device, and the sample container 3 is placed on the limiting portion 22, and the limiting portion 22 is used to limit the radial movement of the sample container 3. Among them, the sample container 3 can be a crucible, the sample to be tested can be a liquid sample and a liquid-conducting sample related to the atomization device, the liquid sample can be an atomization matrix, and the liquid-conducting sample can be a fluffy cotton sample or other fiber products, such as raw cotton, oil-conducting cotton, oil-storing cotton, etc.

[0035] In this embodiment, the tray 2 can be connected to the bracket 1 for stable sample preparation, and the sample can be efficiently loaded through the sample container 3. The carbon deposits generated by the sample will also be adsorbed in the sample container 3, thereby reducing the pollution problem, and the sample container 3 can be stably set on the tray 2 through the limiting portion 22, thereby completing the sample preparation.

[0036] In some embodiments, Figure 1 As shown, the bracket 1 includes a seat body 11, a rod body 12 and a connector 13. The first end of the rod body 12 is mounted on the seat body 11, the first end of the connector 13 is mounted on the second end of the rod body 12, and the second end of the connector 13 is detachably connected to the connecting portion 23 on the support tray 2. The seat body 11 is a magnetic body with a horizontal bottom, the rod body 12 is a bent support rod, and the connector 13 is a hanging wire.

[0037] For example, the overall height of the bracket 1 is 10 to 15 cm, the support rod is bent 90 degrees, and the length of the hanging wire is 5 to 10 mm. This is only an example and is not intended to limit the present application.

[0038] In some embodiments, the tray 2 and the sample container 3 are both trays and bodies made of heat-conducting materials, wherein the heat-conducting material may be metal materials or ceramic materials, for example, the tray 2 is a platinum tray, and the sample container 3 is a disposable ceramic crucible with a lid. The platinum tray and the ceramic crucible with a lid are merely examples and are not intended to limit the present application.

[0039] In some embodiments, Figure 2 As shown, the tray 2 also includes a bottom plate 21. In order to make the sample evenly heated during the test and improve the stability of the test result, the limiting portion 22 is provided at the center of the bottom plate 21, that is, the sample container 3 can be stably placed at the center of the bottom plate 21. For example, the bottom plate 21 is a circular bottom plate, and the circular bottom plate here is only an example and is not intended to limit the present application.

[0040] In some embodiments, Figure 2 As shown, the limiting portion 22 is a limiting baffle plate that is continuous in the circumferential direction of the chassis 21, that is, an annular baffle plate. Figure 4 As shown, the limiting portion 22 includes at least two arc-shaped limiting baffles spaced opposite to each other in the circumferential direction of the bottom plate 21. In addition, the height of the limiting baffle is smaller than the height of the sample container 3, and the inner diameter surrounded by the limiting baffle is larger than the outer diameter of the sample container 3. Preferably, the inner wall surface of the limiting baffle is in contact with the outer wall surface of the sample container 3.

[0041] For example, the outer diameter of the sample container 3 is 6.5 mm, the height is 4 mm, the height of the limit baffle is 1 mm, and the inner diameter surrounded by the limit baffle is 6.6 mm. This is only an example and is not intended to limit the present application.

[0042] In some embodiments, Figure 5 As shown, the connecting part 23 is a strip body that extends obliquely from both sides of the chassis 21 to the middle and is connected, and the connection forms a bending position 231. Correspondingly, the bracket 1 includes a bending portion 131a for hooking with the bending position 231, that is, the second end of the connecting body 13 is provided with a bending portion 131a. The bending position 231 can also be hung on one end of the balance 20. It should be noted that there is a space for placing the sample container 3 between the connection and the chassis 21.

[0043] In some other embodiments, Figure 6 As shown, the connecting portion 23 is a strip body extending obliquely from both sides of the chassis 21 to the middle and connected, and the joint forms a bending position 231 made of metal material. Correspondingly, the bracket 1 includes a magnetic attraction portion 131b for magnetic attraction on the bending position 231, that is, the second end of the connecting body 13 is provided with a magnetic attraction portion 131b.

[0044] In some embodiments, even if a certain amount of carbon deposits are generated during the testing of liquid samples, raw cotton, etc., since the sample is contained in the sample container 3, the generated carbon deposits are also adsorbed in the sample container 3 and will not cause pollution to the inner wall of the equipment furnace body, and the sample container 3 will be thrown away after the sample preparation is completed and tested.

[0045] Among them, Figure 3 As shown, the sample container 3 includes a cover 31 and a main body 32, and the main body 32 is arranged on the limiting portion 22. Accordingly, the height of the limiting baffle is smaller than the height of the main body 32, and the inner diameter surrounded by the limiting baffle is larger than the outer diameter of the main body 32. Preferably, the inner wall surface of the limiting baffle is in contact with the outer wall surface of the main body 32. For example, the sample container 3 is a disposable ceramic crucible with a cover.

[0046] like Figure 7As shown, one embodiment of the utility model discloses a thermogravimetric analysis weighing device 100, including a balance 20 and the sample preparation device 10 described in the above embodiment, which is applied to the thermogravimetric analysis of the sample to be tested related to the atomization device. The sample preparation device 10 is not described in detail here. The sample preparation device 10 is detachably connected to the weighing end of the balance 20 through the connecting portion 23 on the tray 2. Specifically, the tray 2 removed from the bracket 1 is detachably connected to one end of the balance 20 through the connecting portion 23. For example, the bending portion 231 on the connecting portion 23 can be hung on one end of the balance 20.

[0047] During the specific test, first put the disposable ceramic crucible with a cover into the platinum pan for tare calibration, put the weighed (5-10ug) sample to be tested into the disposable ceramic crucible with a cover to complete efficient sample loading, and then place the disposable ceramic crucible with a cover into the platinum pan on the bracket 1. After the sample preparation is completed, the tray 2 is removed from the bracket 1 and hung on one end of the balance 20 in the furnace body of the equipment through the machine to start the thermogravimetric analysis test.

[0048] By implementing the utility model, the following beneficial effects are achieved:

[0049] The utility model can connect the tray to the bracket to perform stable sample preparation, and the sample can be efficiently loaded through the sample container, and the carbon deposits generated by the sample will also be adsorbed in the sample container, thereby reducing the pollution problem, and the sample container can be stably set on the tray through the limiting part, thereby completing the sample preparation.

[0050] In addition, when the tray of the sample preparation device is removed from the bracket and connected to a balance, the problem of unstable weighing can be effectively solved, thereby obtaining stable test results.

[0051] It can be understood that the above embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A sample preparation device, characterized in that: include: Bracket; A supporting tray, the supporting tray comprising a limiting portion and a connecting portion, the supporting tray being detachably connected to the bracket via the connecting portion; as well as A sample container for accommodating a sample to be tested related to the atomization device, wherein the sample container is placed on the limiting portion, and the limiting portion is used to limit radial movement of the sample container.

2. The sample preparation device according to claim 1, characterized in that: The supporting tray further includes a bottom plate, and the limiting portion is arranged at the center position of the bottom plate.

3. The sample preparation device according to claim 2, characterized in that: The limiting portion is a limiting baffle plate that is continuous in the circumferential direction of the chassis; or, the limiting portion includes at least two arc-shaped limiting baffle plates that are spaced and opposite to each other in the circumferential direction of the chassis; The height of the limiting baffle is smaller than the height of the sample container; the inner diameter surrounded by the limiting baffle is larger than the outer diameter of the sample container.

4. The sample preparation device according to claim 2, characterized in that: The connecting portion is a strip-shaped body that extends obliquely from both sides of the chassis toward the middle and is connected, and a bending position is formed at the connection point.

5. The sample preparation device according to claim 4, characterized in that: The support comprises: seat body; A rod body, a first end of which is mounted on the base body; A connecting body, wherein the first end of the connecting body is mounted on the second end of the rod body, and the second end of the connecting body is detachably connected to the connecting portion.

6. The sample preparation device according to claim 5, characterized in that: The second end of the connector is a bending portion that is hooked with the bending position; or, the second end of the connector is a magnetic portion that is magnetically connected to the bending position.

7. The sample preparation device according to claim 1, characterized in that: The tray is a tray body made of a heat-conducting material, and the sample container is a container body made of a heat-conducting material.

8. The sample preparation device according to claim 1, characterized in that: The sample container comprises a cover and a main body, and the main body is arranged on the limiting portion.

9. The sample preparation device according to claim 8, characterized in that: The sample container is a crucible.

10. A thermogravimetric weighing device, comprising a balance, characterized in that: Applicable to thermogravimetric analysis of samples to be tested related to atomization equipment, the thermogravimetric analysis weighing equipment further comprising a sample preparation device according to any one of claims 1 to 9; The sample preparation device is detachably connected to the weighing end of the balance through a connecting portion on the supporting tray.

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