Sample preparation device for elemental analyzer

Abstract

The utility model relates to the technical field of laboratory equipment, in particular to a sample preparation device for an elemental analyzer. The sample preparation device for the elemental analyzer comprises a rack, wherein the rack comprises an objective table, a bracket and a guide rail mechanism; the paper shifting mechanism comprises a workbench and four sliding blocks arranged on the workbench. The paper pressing mechanism can move in the extending direction of the guide rail mechanism and comprises two sample pressing columns which are perpendicular to the guide rail mechanism and can do lifting motion, and the sample pressing columns can penetrate through the sample carrying holes to press and tamp the tin foil cups. According to the sample preparation device for the element analyzer, manual sample preparation is not needed, the paper shifting mechanism can be used for shifting the edge of a tin foil cup to be folded inwards, the paper pressing mechanism is used for pressing the tin foil cup, automatic sample preparation is completed, and compared with manual sample preparation, the working efficiency is remarkably improved; the sample leakage rate of sample preparation is reduced, so that key accessories of the elemental analyzer are protected; the contact time of workers and detected samples is shortened, and the infection risk of personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory equipment, in particular to a sample preparation device for an elemental analyzer. Background Art

[0002] An elemental analyzer is a professional instrument for measuring elements C, H, N, S, and O in samples in the field of detection and analysis. Samples are prepared and weighed in tin foil, then placed on a multi-hole injection disk, and enter the combustion tube through a ball valve. The formed analysis gas enters the detector in turn under the action of the carrier gas for detection.

[0003] The tin foil for holding the test sample needs to be made into a cup-shaped structure. Generally, the tin foil cup 7 is made of square tin foil paper, with a narrow bottom and a wide top, in a cup shape, and four corners are formed at the top (as Figure 2 and Figure 3 shown). In the prior art, the sample pressing tool for pressing the tin foil cup 7 includes a sample pressing base 4, a sample preparation sleeve 5, and a sample pressing column 6 (such as the structure shown in Figure 1 ). During sample preparation, the tin foil cup 7 of known weight is placed on the sample preparation sleeve 5, and the sample pressing base 4 is placed below the sample preparation sleeve 5. A small amount of the sample to be measured is placed in the tin foil cup 7. The four corners of the tin foil are respectively pressed towards the center using a sample spoon (or a flat-headed metal rod) and tweezers, so that the tin foil paper tightly wraps the sample and is pressed into the hollow structure of the sample preparation sleeve 5. Finally, the sample wrapped with the tin foil paper is gently struck with the sample pressing column 6 to evacuate the air inside it, forming a flat round small sample cake. The pressing operation of the tin foil cup 7 reduces the contact between the sample and air on the one hand, and avoids the sample from spilling out of the tin foil paper on the other hand, ensuring accurate measurement. Currently, the above pressing operation of the tin foil cup 7 is mostly manually performed by experimenters, and automatic pressing cannot be achieved by machines, which consumes manpower and has a high labor cost. Summary of the Invention

[0004] The utility model provides a sample preparation device for an elemental analyzer, aiming to solve the defects in the prior art that the pressing operation of the tin foil cup is manually performed by experimenters, automatic pressing cannot be achieved by machines, which consumes manpower and has a high labor cost.

[0005] The utility model provides a sample preparation device for an elemental analyzer, comprising:

[0006] A frame, the frame comprising: a loading platform, a bracket, and a guide rail mechanism. The loading platform is connected to the guide rail mechanism through the bracket, and the loading platform is used for placing the sample pressing base and the sample preparation sleeve;

[0007] Paper pushing mechanism, the paper pushing mechanism includes: a workbench and four sliders provided on the workbench. There is a sample loading hole on the workbench, and the position of the sample loading hole corresponds to the placement position of the tin paper cup. Each slider is provided outside the sample loading hole and can reciprocate in the direction towards the sample loading hole under the drive of a power device. A through hole is provided at one end of each slider facing the sample loading hole;

[0008] Paper pressing mechanism, the paper pressing mechanism includes: two sample pressing columns perpendicular to the guide rail mechanism; one end of each sample pressing column is movably provided on the guide rail mechanism in a liftable manner and can move along the extension direction of the guide rail mechanism; the head of one of the sample pressing columns is a silica gel head, and the head of the other sample pressing column is a metal head. The sample pressing columns can all pass through the sample loading hole and the through holes on the sliders to press the tin foil cup. The silica gel head is used to fold and press the tin paper cup, and the metal head is used to suppress the sample to evacuate the internal air and make the structure compact.

[0009] According to the sample maker for an elemental analyzer provided by the present invention, the guide rail mechanism includes:

[0010] Installation frame, the installation frame is fixedly connected to the bracket;

[0011] First guide rail, the first guide rail is horizontally provided on the installation frame;

[0012] Second guide rail, the second guide rail is horizontally provided on the first guide rail, and the second guide rail and the first guide rail are perpendicular to each other.

[0013] According to the sample maker for an elemental analyzer provided by the present invention, two adjacent sliders are perpendicular to each other, and each slider is driven by one power device to move in the direction towards or away from the sample loading hole.

[0014] According to the sample maker for an elemental analyzer provided by the present invention, each power device includes: a motor, a driving wheel and a rack. The motor is connected to the driving wheel, the rack and the driving wheel are engaged with each other, and the rack is fixedly connected to the slider.

[0015] According to the sample maker for an elemental analyzer provided by the present invention, the paper pressing mechanism further includes:

[0016] First driving unit, the first driving unit is fixed on the first guide rail;

[0017] First transmission unit, one end of the first transmission unit is connected to the output end of the first driving unit, and the other end of the first transmission unit is connected to the second guide rail for driving the second guide rail to move along the extension direction of the first guide rail;

[0018] A second driving unit, which is fixed on the second guide rail;

[0019] A second transmission unit, one end of which is connected to the output end of the second driving unit, and the other end of which is used to mount the corresponding sample pressing column and move along the extending direction of the second guide rail.

[0020] According to the sample preparation device for an elemental analyzer provided by the present utility model, the paper pressing mechanism includes:

[0021] A linear motion module, which is arranged between the second transmission unit and the sample pressing column.

[0022] A sample preparation device for an elemental analyzer provided by the present utility model includes: a frame, the frame includes: a loading platform, a bracket and a guide rail mechanism, the loading platform is connected to the guide rail mechanism through the bracket, and the loading platform is used to place a sample pressing base and a sample preparation sleeve; a paper dialing mechanism, the paper dialing mechanism includes: a workbench and four sliders arranged on the workbench, a sample loading hole is arranged on the workbench, and the position of the sample loading hole corresponds to the position where the tin paper cup is placed, each slider is arranged outside the sample loading hole and can reciprocally move towards the direction of the sample loading hole under the drive of a power device, and a through hole is arranged at one end of each slider facing the sample loading hole; a paper pressing mechanism, the paper pressing mechanism includes: two sample pressing columns perpendicular to the guide rail mechanism; one end of each sample pressing column is movably arranged on the guide rail mechanism in a liftable manner and can move along the extending direction of the guide rail mechanism; the head of one of the sample pressing columns is a silica gel head, and the head of the other sample pressing column is a metal head, and the sample pressing columns can both pass through the sample loading hole or the through hole on the slider to press the tin foil cup, the silica gel head is used to fold and press the tin paper cup, and the metal head is used to suppress the sample to discharge the air inside it and make the structure compact. The sample preparation device for an elemental analyzer provided by the present utility model can complete automatic sample preparation without manual sample preparation. It can use the movement of each slider in the paper dialing mechanism towards the sample loading hole to dial the edge of the tin foil cup to fold inwards, and use the paper pressing mechanism to pass through the sample loading hole to press and compact the tin foil cup, thereby significantly improving the work efficiency compared with manual sample preparation; reducing the sample leakage rate during sample preparation, effectively protecting the key accessories of the elemental analyzer; reducing the contact time between the operator and the sample to be detected, and reducing the risk of personnel infection. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of a sample pressing base, a sample preparation sleeve, and a sample pressing column in the prior art.

[0025] Figure 2 It is a front view of a tin foil cup in the prior art.

[0026] Figure 3 It is a top view of a tin foil cup in the prior art.

[0027] Figure 4 It is a schematic structural diagram of the overall sample preparation device for an elemental analyzer in one embodiment of the present invention.

[0028] Figure 5 It is a schematic structural diagram of a paper feeding mechanism in one embodiment of the present invention.

[0029] Reference numerals:

[0030] 11: loading platform; 12: support; 13: guide rail mechanism; 131: mounting frame; 132: first guide rail; 133: second guide rail; 2: paper feeding mechanism; 211: workbench; 212: slider; 213: sample loading hole; 3: paper pressing mechanism; 31: linear motion module; 32: sample pressing column; 4: sample pressing base; 5: sample preparation sleeve; 6: sample pressing column; 7: tin foil cup. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts belong to the scope of protection of the present invention.

[0032] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0034] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0036] The following Figure 4 and Figure 5 describe a sample preparation device for an elemental analyzer according to the present utility model, which includes: a frame, a paper feeding mechanism 2, and a paper pressing mechanism 3.

[0037] Among them, the frame includes: a loading platform 11, a bracket 12, and a guide rail mechanism 13. The loading platform 11 is connected to the guide rail mechanism 13 through the bracket 12. The loading platform 11 is used to place the sample pressing base 4 and the sample preparation sleeve 5. The paper dialing mechanism 2 includes: a workbench 211 and four sliders 212 provided on the workbench 211. A sample loading hole 213 is provided on the workbench 211, and the position of the sample loading hole 213 corresponds to the position where the tin paper cup is placed. Each slider 212 is provided outside the sample loading hole 213 and can reciprocate in the direction towards the sample loading hole 213 under the drive of a power device. A through hole is provided at one end of each slider 212 facing the sample loading hole 213. One end of the paper pressing mechanism 3 is movably provided on the guide rail mechanism and can move along the extension direction of the guide rail mechanism. The paper pressing mechanism 3 includes: two sample pressing columns 32 perpendicular to the guide rail mechanism. One end of each sample pressing column 32 is vertically movably provided on the guide rail mechanism 13 and can move along the extension direction of the guide rail mechanism 13. The head of one sample pressing column 32 is a silica gel head, and the head of the other sample pressing column 32 is a metal head. The sample pressing columns 32 can all pass through the through holes on the sample loading hole 213 and the sliders 212 to press the tin foil cup. The silica gel head is used to fold and press the tin paper cup, and the metal head is used to suppress the sample.

[0038] Specifically, the sample preparation sleeve 5 is placed above the sample pressing base 4 and combined and placed on the loading platform 11. The bracket 12 is used to support the guide rail mechanism 13. The guide rail mechanism 13 is fixed above the loading platform 11 through the bracket 12 and is used to define the moving direction of the paper pressing mechanism 3. The guide rail mechanism 13 is horizontally arranged. The paper pressing mechanism 3 can slide horizontally on the guide rail mechanism 13 and can drive the sample pressing column 32 to pass through the through holes on the sliders 212 to press the tin foil cup through its own vertical movement, or suppress the tin paper cup and its internal sample through the sample loading hole 213.

[0039] The paper dialing mechanism 2 includes a workbench 211 and four sliders 212 that can move on the workbench 211. A sample loading hole 213 for the sample pressing column 32 to pass through is provided at the center position of the workbench 211. During the movement of the sliders 212 in the direction towards the sample loading hole 213, the tin paper cup is folded inward by the contact between the sliders 212 and the edge of the tin paper cup, thus completing the paper dialing operation. It should be understood that in order to ensure the correct moving direction of the sliders 212, a track for guiding the moving direction of the sliders 212 is provided on the workbench 211, and this track extends in the direction towards the sample loading hole 213.

[0040] The pressing processes of the paper dialing mechanism 2 and the paper pressing mechanism 3 are as follows:

[0041] The four sliders are respectively named slider A, slider B, slider C, and slider D.

[0042] First, the A slider moves towards the middle. When it contacts the edge of the tin paper cup, it folds the cup inward. The through-hole of the slider aligns with the sample-loading hole 213 of the workbench. The silica gel column head moves downward through the through-hole and the sample-loading hole 213 to press the tin paper cup. After the pressing is completed, the silica gel column head rises.

[0043] Then, the B slider, C slider, and D slider move towards the middle in sequence, and four pressing operations are respectively completed by using the silica gel column heads.

[0044] Finally, the four sliders all reset. The tin paper cup and the sample inside it are compacted by the free fall of the metal column head. The metal column head can drive the tin paper cup into the sample preparation sleeve 5.

[0045] A sample preparation device for an elemental analyzer provided by the utility model includes: a frame, which includes: a loading table, a bracket, and a guide rail mechanism. The loading table is connected to the guide rail mechanism through the bracket. The loading table is used to place a sample pressing base and a sample preparation sleeve; a paper dialing mechanism, which includes: a workbench and four sliders arranged on the workbench. A sample-loading hole is arranged on the workbench, and the position of the sample-loading hole corresponds to the placement position of the tin paper cup. Each slider is arranged outside the sample-loading hole and can reciprocate towards the direction of the sample-loading hole under the drive of a power device. A through-hole is arranged at one end of each slider facing the sample-loading hole; a paper pressing mechanism, which includes: two sample pressing columns perpendicular to the guide rail mechanism; one end of each sample pressing column is movably arranged on the guide rail mechanism in a liftable manner and can move along the extension direction of the guide rail mechanism; the column head of one sample pressing column is a silica gel column head, and the column head of the other sample pressing column is a metal column head. The sample pressing columns can all pass through the sample-loading hole or the through-hole on the slider to press the tin foil cup. The silica gel column head is used to fold and press the tin paper cup, and the metal column head is used to compact the sample to empty the air inside it and make the structure compact. The sample preparation device for an elemental analyzer provided by the utility model does not require manual sample preparation. The movement of each slider 212 in the paper dialing mechanism 2 towards the sample-loading hole 213 can be used to dial the edge of the tin foil cup to fold it inward, and the paper pressing mechanism 3 can pass through the sample-loading hole 213 to press and compact the tin foil cup, thereby completing automatic sample preparation. Compared with manual sample preparation, the working efficiency is significantly improved; the sample leakage rate during sample preparation is reduced, effectively protecting the key accessories of the elemental analyzer; the contact time between the operator and the sample to be detected is reduced, and the risk of personnel infection is lowered.

[0046] In one embodiment of the present utility model, the guide rail mechanism 13 includes: a mounting frame 131, a first guide rail 132, and a second guide rail 133. Among them, the mounting frame 131 is fixedly connected to the bracket 12; the first guide rail 132 is horizontally arranged on the mounting frame 131; the second guide rail 133 is horizontally arranged on the first guide rail 132, and the second guide rail 133 and the first guide rail 132 are perpendicularly arranged to each other. Specifically, the mounting frame 131 serves as a mounting framework and is fixed on the top of the bracket 12. The first guide rail 132 is movably mounted on the mounting frame 131, and the second guide rail 133 can be mounted on the first guide rail, so as to adjust the horizontal and vertical positions of the paper pressing mechanism 3.

[0047] In one embodiment of the present utility model, the paper dialing mechanism 2 includes: two adjacent sliders 212 are perpendicular to each other, and each slider 212 is driven by a power device to move in a direction close to or away from the sample loading hole 213. Specifically, each power device includes: a motor, a driving wheel, and a rack. The motor is connected to the driving wheel and drives the driving wheel to rotate. The rack and the driving wheel are engaged with each other. The rotation of the driving wheel drives the rack to move. The rack is fixedly connected to the slider, so as to drive the slider to move. In this embodiment, corresponding to the four corners of the tin foil cup 7, four sliders 212 are provided. One slider 212 corresponds to dialing one corner of the folded tin foil cup 7, and each slider 212 is driven to move by the corresponding power device.

[0048] In one embodiment of the present utility model, the paper dialing mechanism 2 further includes: a first driving unit fixed on the first guide rail; a first transmission unit, one end of the first transmission unit is connected to the output end of the first driving unit, and the other end of the first transmission unit is connected to the second guide rail, and is used to drive the second guide rail to move along the extension direction of the first guide rail; a second driving unit fixed on the second guide rail; a second transmission unit, one end of the second transmission unit is connected to the output end of the second driving unit, and the other end of the second transmission unit is used to mount the corresponding sample pressing column and move along the extension direction of the second guide rail. In this embodiment, the first driving unit and the second driving unit can adopt motors as the power source for the horizontal movement of the sample pressing column 32; the first transmission unit and the second transmission unit can adopt structures such as transmission wheels and gear racks to convert the rotational movement of the motor into the horizontal reciprocating movement of the sample pressing column 32. More specifically, the first transmission unit is used to drive the second guide rail to move along the extension direction of the first guide rail, and the second transmission unit can be used to drive the sample pressing column to move along the extension direction of the second guide rail. And the sample pressing column is divided into two parts: a metal column head and a silica gel column head. Therefore, two second transmission units are required to drive the metal column head and the silica gel column head to move respectively.

[0049] It can be understood that the above-mentioned first drive unit and second drive unit can still adopt the drive mode of gears and racks, and still convert rotational motion into linear reciprocating motion, which will not be elaborated here. Of course, the above-mentioned first drive unit, second drive unit, first drive unit and second drive unit can also be replaced by structures such as linear modules or push rods, and as long as linear reciprocating motion can be achieved, the requirements are met.

[0050] In one embodiment of the present utility model, the paper pressing mechanism 3 includes: a linear motion module 31, and the linear motion module 31 is arranged between the second drive unit and the sample pressing column. In this embodiment, the linear motion module 31 can perform lifting motion, driving the sample pressing column 32 to perform lifting motion synchronously. When the linear motion module 31 drives the sample pressing column 32 to descend to a specified position, the foil cup 7 can be pressed. When the linear motion module 31 continues to descend, the foil and the sample are pressed into the sample preparation sleeve 5 and cooperate with the sample pressing base 4 to achieve compaction.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A sample preparation device for an element analyzer, characterized in that: include: A rack, the rack comprising: a stage, a bracket and a guide rail mechanism, the stage is connected to the guide rail mechanism through the bracket, and the stage is used to place a sample pressing base and a sample preparation sleeve; A paper-moving mechanism, the paper-moving mechanism comprising: a workbench and four sliders arranged on the workbench, the workbench is provided with a sample-loading hole, the position of the sample-loading hole corresponds to the placement position of the tin paper cup, each of the sliders is arranged outside the sample-loading hole, and can be reciprocated toward the direction of the sample-loading hole by the drive of a power device, and each of the sliders is provided with a through hole at one end facing the sample-loading hole; The paper pressing mechanism comprises: two sample pressing columns perpendicular to the guide rail mechanism; one end of each sample pressing column is movably arranged on the guide rail mechanism and can be moved along the extension direction of the guide rail mechanism; the column head of one of the sample pressing columns is a silicone column head, and the column head of the other sample pressing column is a metal column head, and the sample pressing columns can pass through the sample loading hole and the through hole on the slider to press the tin foil cup, the silicone column head is used to fold and press the tin foil cup, and the metal column head is used to suppress the sample.

2. The sample preparation device for elemental analyzer according to claim 1, characterized in that: The guide rail mechanism comprises: An installation frame, wherein the installation frame is fixedly connected to the bracket; A first guide rail, the first guide rail is horizontally arranged on the installation frame; The second guide rail is horizontally arranged on the first guide rail, and the second guide rail and the first guide rail are arranged perpendicular to each other.

3. The sample preparation device for elemental analyzer according to claim 2, characterized in that: Two adjacent sliders are perpendicular to each other, and each slider is driven by one of the power devices to move toward or away from the sample loading hole.

4. The sample preparation device for elemental analyzer according to claim 3, characterized in that: Each of the power devices comprises: a motor, a driving wheel and a rack, the motor is connected to the driving wheel, the rack and the driving wheel are engaged with each other, and the rack is fixedly connected to the slider.

5. The sample preparation device for elemental analyzer according to claim 2, characterized in that: The paper pressing mechanism also includes: a first driving unit, wherein the first driving unit is fixed on the first guide rail; a first transmission unit, one end of which is connected to the output end of the first driving unit, and the other end of which is connected to the second guide rail, for driving the second guide rail to move along the extension direction of the first guide rail; a second driving unit, wherein the second driving unit is fixed on the second guide rail; A second transmission unit, one end of the second transmission unit is connected to the output end of the second driving unit, and the other end of the second transmission unit is used to install the corresponding sample pressing column and move along the extension direction of the second guide rail.

6. The sample preparation device for elemental analyzer according to claim 5, characterized in that: The paper pressing mechanism comprises: A linear motion module is provided between the second transmission unit and the sample pressing column.

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