Multi-position sample cell

Abstract

The utility model discloses a multi-position sample cell which comprises a mounting base on which a servo motor is arranged, and further comprises a sample cell turntable of which the axis is connected with the output end of the servo motor; the sample pools are in a circumferential matrix and are detachably connected to the side surface of the sample pool turntable; and the window membrane can be mounted in the sample cell in a pressing manner. According to the multi-position sample cell, the problems that only a single measurement sample can be measured and the measurement efficiency is low in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of X-ray scattering technology, specifically to a multi-position sample cell. Background Technology

[0002] Small-angle X-ray scattering (SAXS) is an important tool for studying the microstructure of matter and is widely used in materials science, life sciences, chemistry, geology and other fields.

[0003] In current equipment, such as the Xeuss series small-angle X-ray scattering instrument produced by Sinop AG of France, the existing sample cell can only measure one sample in real time. The sample is placed in the appropriate position in the experimental chamber and the experiment is started.

[0004] The drawbacks of the device are: because it can only use one fluid cell, it can only measure one sample at a time, resulting in low measurement efficiency. At the same time, during measurement, operators need to be on-site at all times to adjust the equipment or change the measurement sample and blank space, which consumes a lot of time and manpower. Furthermore, when multiple samples need to be analyzed, it cannot meet the requirement of analyzing multiple samples in the same external environment (due to changes in the external environment such as time and temperature difference caused by multiple detection and replacement), which leads to deviations in the test results. Utility Model Content

[0005] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0006] To achieve these objectives and other advantages according to the present invention, a multi-position sample cell is provided, comprising: a mounting base on which a servo motor is mounted, and further comprising:

[0007] The sample cell turntable has its axis connected to the output end of the servo motor.

[0008] The sample cells are arranged in a circular matrix and are detachably connected to the side of the sample cell turntable.

[0009] A window membrane that can be compressed and installed inside the sample cell.

[0010] Preferably, the sample cell and the sample cell turntable are detachably connected in the following manner:

[0011] The sample cell turntable has L-shaped positioning holes distributed in a circumferential matrix on its side.

[0012] The bottom of the sample cell is provided with a positioning block, which is inserted into the L-shaped positioning hole and connected by bolts.

[0013] Preferably, the sample cell structure includes:

[0014] The sample cell support has a through hole inside, and the lower half is a hollow disk with a window membrane inside.

[0015] A perforated sealing cap is bolted to the top of the sample cell holder;

[0016] The two annular pressure plates I and II are symmetrically arranged about the hollow disk, and the upper half of both pressure plates I and II are connected to the sample cell support by bolts. Both pressure plates I and II have circular slots at their positions relative to the window membrane.

[0017] The O-ring is installed in a circular groove, and the part of the O-ring protruding from the groove 46 is in contact with the edge of the window film.

[0018] The bottom of the pressure plate I is provided with a through hole, and the bottom of the pressure plate II is provided with a bolt hole. The through hole and the bolt hole are arranged opposite to each other and are sealed by bolt connection.

[0019] Preferably, a circular composite gasket is provided between the perforated sealing cap and the sample cell support.

[0020] Preferably, the O-ring is a silicone composite O-ring; and the composite gasket is a PTFE and silicone rubber composite gasket.

[0021] This utility model has at least the following beneficial effects:

[0022] This device, through its multi-sample cell design, can increase the number of samples collected in a single session, improve measurement efficiency, avoid errors caused by changes in the external environment due to multiple tests, and achieve sampling sealing by pressing the window membrane to avoid sample loss and air intrusion, ensuring sample purity, stability, and the ability to sample at any time. It also facilitates the extraction of samples from the experiment to other devices for analysis, and the analysis of changes in other parameters on other devices.

[0023] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the sample cell turntable of this utility model;

[0026] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 For the present utility model Figure 2 Enlarged cross-section diagram at point A;

[0028] The markings in the diagram are: 1. Mounting base, 2. Servo motor, 3. Sample cell turntable, 31. L-shaped positioning hole, 4. Sample cell, 41. Sample cell bracket, 42. Hollow disc, 43. Perforated sealing cap, 44. Pressing tablet I, 441. Through hole, 45. Pressing tablet II, 451. Bolt hole, 46. Circular groove, 47. O-ring, 48. Composite gasket, 5. Window film, 6. Positioning block, 7. Bolt. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0030] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0031] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] The following is a detailed description of this novel experimental device with reference to the accompanying drawings:

[0035] Figure 1-4 This invention discloses a multi-position sample cell, comprising: a mounting base 1 on which a servo motor 2 is mounted, and further comprising:

[0036] The sample cell turntable 3 has its axis connected to the output end of the servo motor 2;

[0037] Sample cell 4 is arranged in a circular matrix and is detachably connected to the side of sample cell turntable 3;

[0038] Window membrane 5, which can be pressed and installed inside sample cell 4.

[0039] Working principle:

[0040] Gas or liquid is introduced into the window membrane 5 inside the sample cell 4 via an external sampler, thus completing one sample collection. The servo motor 2 on the mounting base 1 can be started by an external power supply. The servo motor 2 drives the sample cell turntable 3 to rotate, so that the next sample cell 4 is aligned with the sampler for the next sampling. After all sampling is completed, the operator presses the sample cell 4 to seal the window membrane 5.

[0041] Among them, ① this device can preferentially select 12 positions, and can be loaded at once according to the existing usage, meeting the detection needs of 11 detection time periods, reducing the loading time.

[0042] ②The servo motor 2 can be replaced with a stepper motor, DC motor, etc. as the actuator, depending on cost requirements.

[0043] ③ The window membrane 5 is a hollow structure formed by pressing two circular films together at the edges, which can seal the liquid or gas in the solution pool. The material is polyimide. In actual use, the window membrane 5 can be replaced with other materials such as polyester film or polypropylene film, depending on the type of radiation being detected.

[0044] ④ The sides of the sample cell are polished, Ra≤0.8.

[0045] In summary, this device, through its multi-position sample cell design, can increase the number of samples collected in a single session, improve measurement efficiency, avoid errors caused by changes in the external environment due to multiple tests, and achieve sampling sealing by pressing the window membrane 5 to avoid sample loss and air intrusion, ensuring the purity and stability of the samples and facilitating sampling at any time. This also makes it convenient to extract samples during the experiment for analysis on other devices, and to analyze the changes in other parameters on other devices.

[0046] In the above scheme, the sample cell 4 and the sample cell turntable 3 are detachably connected in the following way:

[0047] The sample cell turntable 3 has L-shaped positioning holes 31 arranged in a circumferential matrix on its side; the sample cell 4 has a positioning block 6 at its bottom.

[0048] The operator fixes the sample cell 4 to the sample cell turntable 3 by inserting the positioning block 6 into the L-shaped positioning hole 31, and finally uses bolts to strengthen the connection between the two to prevent the sample cell 4 from falling off during the rotation of the sample cell turntable 3.

[0049] As described above, the structure of the sample cell 4 includes:

[0050] The sample cell support 41 has a through hole inside, and the lower half is a hollow disk 42, and a window membrane 5 is provided inside the hollow disk 42;

[0051] A perforated sealing cap 43 is bolted to the top of the sample cell holder 41;

[0052] The two annular pressure plates I 44 and II 45 are symmetrically arranged about the hollow disk 42, and the upper half of both pressure plates I 44 and II 45 are connected to the sample cell support 41 by bolts. Both pressure plates I 44 and II 45 are provided with circular slots 46 at positions relative to the window membrane 5.

[0053] O-ring 47 is installed in circular groove 46, and the part of O-ring 47 protruding from groove 46 is in contact with the edge of window film 5.

[0054] The bottom of the pressure plate I 44 is provided with a through hole 441, and the bottom of the pressure plate II 45 is provided with a bolt hole 451. The through hole 441 and the bolt hole 451 are arranged opposite to each other and are connected by bolts 7 to achieve sealing.

[0055] Working principle:

[0056] Before installation, the operator passes the bolt 7 through the through hole 441 and connects it to the bolt hole 451. By tightening the bolt 7, the pressure plate I 44 and pressure plate II 45 are brought closer together, causing the O-ring 47 on the circular groove 46 to be squeezed and deformed. The force generated by the deformation of the O-ring 47 completes the sealing of the edges of the two window membranes 5, ensuring the internal sealing, avoiding sample loss and air ingress, and ensuring the purity and stability of the sample.

[0057] The external injector passes through the small hole on the perforated sealing cap 43 and enters the sample cell support 41. Gas or liquid is injected into the two window membranes 5 installed on the hollow disk 42 through the through hole. After the injection is completed, the injector is pulled out. The punctured O-ring 47 will re-seal the puncture site under its own deformation and the pressure on both sides.

[0058] In the above scheme, a circular composite gasket 48 is provided between the perforated sealing cap 43 and the sample cell support 41.

[0059] Working principle: The external sample injector passes through the small hole on the perforated sealing cap 43, pierces the composite gasket 48 (material such as PTFE and silicone rubber composite material), enters the through hole, and injects gas or liquid into the window membrane 5. After the injection is completed, the sample injector is pulled out.

[0060] In the above scheme, the O-ring 47 is a silicone composite O-ring; the composite gasket 48 is a PTFE and silicone rubber composite gasket.

[0061] Working principle: In actual use, the composite gasket 48 is preferably made of PTFE and silicone rubber composite material (commercially available product), and the O-ring 47 is made of silicone rubber composite material (commercially available product); because silicone material has a certain high elastic modulus and low permanent deformation rate, after the puncture object is removed, the molecular chain will immediately contract towards the center of the hole through entropy elasticity, and complete the self-sealing in time to prevent sample leakage.

[0062] Among them, the composite gasket 48 allows for sampling at any time during actual use without any gas or liquid leakage.

[0063] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-position sample cell, comprising: The mounting base, on which a servo motor is mounted, is characterized by further comprising: The sample cell turntable has its axis connected to the output end of the servo motor. The sample cells are arranged in a circular matrix and are detachably connected to the side of the sample cell turntable. A window membrane that can be compressed and installed inside the sample cell.

2. The multi-position sample cell according to claim 1, characterized in that, The sample cell and the sample cell turntable are detachably connected in the following manner: The sample cell turntable has L-shaped positioning holes distributed in a circumferential matrix on its side. The bottom of the sample cell is provided with a positioning block, which is inserted into the L-shaped positioning hole and connected by bolts.

3. The multi-position sample cell according to claim 1, characterized in that, The structure of the sample cell includes: The sample cell support has a through hole inside, and the lower half is a hollow disk with a window membrane inside. A perforated sealing cap is bolted to the top of the sample cell holder; The two annular pressure plates I and II are symmetrically arranged about the hollow disk, and the upper half of both pressure plates I and II are connected to the sample cell support by bolts. Both pressure plates I and II have circular slots at their positions relative to the window membrane. The O-ring is installed in a circular groove, and the part of the O-ring protruding from the groove (46) is attached to the edge of the window film. The bottom of the pressure plate I is provided with a through hole, and the bottom of the pressure plate II is provided with a bolt hole. The through hole and the bolt hole are arranged opposite to each other and are sealed by bolt connection.

4. The multi-position sample cell according to claim 3, characterized in that, A circular composite gasket is provided between the perforated sealing cap and the sample cell support.

5. The multi-position sample cell according to claim 4, characterized in that, The O-ring is a silicone composite O-ring; the composite gasket is a PTFE and silicone rubber composite gasket.

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