Material loading device and material specific surface area testing system

Abstract

The utility model provides a kind of material sample loading device and test system, including sample inlet unit, transition pipe, sample tube;The transition pipe includes sample channel, the sample channel includes sample inlet and sample outlet, the transition pipe is inserted into sample tube, and the sample outlet is located in sample tube;The sample inlet unit sends sample from the sample inlet into sample channel, and the sample channel is helical shape.The utility model is inserted into sample tube by transition pipe, and its internal helical channel, can make powder slowly enter sample tube bottom, avoid powder from sample tube mouth after pouring splash, and sample falls into sample tube bottom after loose state influence test effect.When loading sample, it is unnecessary to move or touch sample tube, avoid sample tube fragmentation.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, specifically a material sample loading device and a material specific surface area testing system. Background Technology

[0002] Testing the specific surface area of ​​materials requires a specific surface area analyzer. In specific surface area tests (such as the BET method and gas adsorption method), the sample loading process has a significant impact on the accuracy of the test results. Currently, the design of the testing system is unreasonable regarding sample loading, waste disposal after testing, and cleaning of glass sample tubes. In addition, the spherical sample tubes used for specific surface area testing are made of glass. Manual operation during loading is slow and time-consuming, and there is a risk of sample tubes falling off, breaking, or being scratched. At the same time, sample residue can easily remain on the tube wall, causing inaccurate test results. Cleaning the sample residue off the tube wall after testing is time-consuming and laborious, and incomplete cleaning may affect the next test. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to simplify the sample loading steps while ensuring that the sample loading meets the requirements and has a self-cleaning function.

[0004] This utility model solves the above-mentioned technical problems through the following technical means:

[0005] A material loading device includes a sample injection unit, a transition tube, and a sample tube. The transition tube includes a sample channel with an inlet and an outlet. The transition tube extends into the sample tube, and the outlet is located inside the sample tube. The sample injection unit delivers the sample from the inlet into the sample channel, which is spiral-shaped. This invention, through the transition tube extending into the sample tube and its internal spiral channel, allows powder to slowly enter the bottom of the sample tube, avoiding splashing of powder after being poured in from the sample tube opening and preventing the sample from becoming loose and affecting the testing results. During sample loading, there is no need to move or touch the sample tube, preventing breakage.

[0006] Preferably, it also includes a self-cleaning unit; there is an annular cavity between the transition tube and the sample tube, the top of the annular cavity is sealed by a cap, the cap has an air inlet and an air outlet, and the self-cleaning unit is connected to the air outlet.

[0007] Preferably, the cap is an annular rubber cap.

[0008] Preferably, it also includes a frame, which includes a base, a top seat, and a vertical plate connecting the base and the top seat; multiple grippers are provided on the surface of the vertical plate for gripping the transition tube and the sample tube respectively.

[0009] Preferably, the self-cleaning unit includes a vacuuming power mechanism and an air duct, with one end of the air duct connected to the vacuuming power mechanism and the other end connected to the air outlet.

[0010] Preferably, the top seat includes a mounting cavity, the dust suction power mechanism is fixed in the mounting cavity, and the side wall of the mounting cavity has a through hole for the air duct to pass through.

[0011] Preferably, the sample tube includes a vertical tube and a container installed at the bottom of the vertical tube; the bottom end of the transition tube is located at the bottom of the vertical tube.

[0012] Preferably, the injection unit is a piston syringe; the piston syringe has graduations on its tube wall.

[0013] Preferably, the outlet of the piston-type syringe is connected to a flexible tube.

[0014] This utility model also provides a material specific surface area testing system, including the above-mentioned material sample loading device.

[0015] The advantages of this utility model are: This invention utilizes a transition tube extending into the sample tube and its internal spiral channel to allow powder to slowly enter the bottom of the sample tube, preventing powder from splashing when poured in from the sample tube opening and avoiding the loose state of the sample at the bottom affecting the test results. During sample loading, there is no need to move or touch the sample tube, thus preventing sample tube breakage.

[0016] Furthermore, this invention uses a piston-type syringe to eject the powder, which can squeeze out excess air in the powder during the ejection process, giving the powder sample a certain degree of density. Then, as it slowly falls along the spiral channel, even if some loosening occurs, it still meets the testing requirements.

[0017] Furthermore, the self-cleaning unit is designed to automatically remove powder from the sample tube and transition tube, without affecting the accuracy of subsequent tests. In particular, the annular cavity between the sample tube and transition tube is sealed with an air inlet and outlet. The outlet connects to the air duct of the self-cleaning unit. When the self-cleaning unit is activated, air can be simultaneously supplied to the transition tube and the air inlet, thus cleaning both the transition tube and the sample tube simultaneously. This results in high cleaning efficiency without the need to disassemble the transition tube and sample tube. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model; Figure 2 for Figure 1 Enlarged diagram of section A in the middle; Figure 3 This is a schematic diagram of the transition tube in an embodiment of the utility model.

[0019] 1-Frame; 11-Base; 12-Vertical plate; 13-Top seat; 2-Sample tube; 3-Sample injection unit; 31-Hose; 4-Transition tube; 5-Self-cleaning unit; 51-Air duct; 6-Cap; 61-Air inlet; 61-Air outlet; 7-Clamping claw. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1 This embodiment describes a material sample loading device for testing the specific surface area of ​​materials. For example... Figure 1 As shown, the material loading device includes a frame 1, which can be made of metal, wood, or polyethylene. The frame 1 includes a base 11, a vertical plate 12 fixed to one side of the base 11, and a top seat 13 fixed to the top of the vertical plate 12. The space formed between the base 11 and the top seat 13 provides a placement space for the sample tube 2. According to the feeding sequence, it also includes a sample feeding unit 3, a transition tube 4, and the sample tube 2. The sample feeding unit 3 delivers a quantitative sample into the transition tube 4, and the outlet of the transition tube 4 extends into the sample tube 2. It also includes a self-cleaning unit 5. There is an annular cavity between the transition tube 4 and the sample tube 2. The top of the annular cavity is sealed by a cap 6. The cap 6 has an air inlet 61 and an air outlet 62, which are connected to the air outlet 62 of the air duct 51 of the self-cleaning unit 5.

[0022] The top base 13 provides a mounting foundation for the sample injection unit 3, the self-cleaning unit 5, the controller, and the start button, while the vertical plate 12 provides a mounting foundation for the sample tube 2 and the transition tube 4. The specific structure is as follows: Sample injection unit 3 can be a piston-type syringe, such as... Figure 1As shown, the piston-type syringe is detachably fixed to the top of the top seat 13 via a bracket. It can be fixed horizontally or vertically, or the operator can hold the piston-type syringe for sample injection. This embodiment takes vertical fixation as an example. The bracket can use simple clamps, such as sample tube clamps used to fix the sample tube 2. The clamp size can be set according to the diameter of the piston-type syringe. The piston-type syringe tube wall is marked with graduations to facilitate quantitative injection of sample into the transition tube 4. In this embodiment, the sample is a dry powder sample. The injection port diameter of the piston-type syringe is generally 2-3 mm to ensure that the powder sample is smoothly ejected. In order to prevent the ejected powder from splashing, a flexible tube 31 is sleeved at the syringe outlet. The flexible tube 31 can extend into the transition tube 4 to a certain depth, generally about 2 cm. In order to facilitate the fixation of the piston-type syringe, the top seat 13 is hollowed out in the middle to form a clearance space, so that the back plate used to fix the piston-type syringe is closer to the vertical plate 12, so that the flexible tube 31 of the piston-type syringe can rest on the inlet of the transition tube 4 in a natural state. Of course, the injection unit 3 can also directly use commercially available screw feeders, vibratory feeders, etc. This embodiment uses the aforementioned piston-type injector to consider cost.

[0023] like Figure 3 As shown, the transition tube 4 is a glass tube with a sample inlet channel 41 inside. The sample inlet channel 41 is a spiral channel with an inlet and an outlet at each end. The pitch of the spiral channel 41 should not be too large, as long as it ensures that the powder falls slowly and does not splash or separate. The pitch can be determined by experiments and will not be described in detail here.

[0024] The transition tube 4 extends into the sample tube 2, positioning the sample outlet within the sample tube 2. When the set amount of powder is ejected by the piston-type injector, it slides through the flexible tube 31 into the spiral channel 41 of the transition tube 4. The powder sample descends spirally along the channel at a slow speed, preventing splashing and ensuring that powder particles of different diameters do not stratify at the bottom of the sample tube 2 due to weight differences. After the set amount of sample is ejected, the piston stops moving downwards due to the resistance between the piston and the tube wall, preventing powder from falling even if the injection port is not sealed. When the piston-type injector is placed horizontally, the powder can also be ejected through the flexible tube 31 into the transition tube 4. Ideally, the spiral channel within the transition tube 4 should only be 1-2 mm larger than the diameter of the piston-type injector flexible tube 31 to ensure that the powder does not completely disperse during its descent.

[0025] The sample tube 2 in this embodiment includes a vertical section and a spherical section. The spherical section is located at the bottom of the vertical section, and the bottom of the transition tube 4 only extends to the bottom of the vertical section to avoid affecting the testing of powder in the spherical section.

[0026] In this embodiment, multiple grippers are installed on the vertical plate 12 to hold the transition tube 4 and the sample tube 2. The grippers can be ordinary sample tube clamps; the appropriate size of the grippers is selected based on the diameter of the sample tube and the transition tube. The grippers are fixed to the vertical plate 12 with screws. The fixing positions of the multiple grippers can be distributed at different heights to prevent the transition tube 4 and the sample tube 2 from swinging.

[0027] like Figure 2 As shown, the transition tube 4 in this embodiment is a transparent glass tube with an outer diameter smaller than that of the sample tube 2, approximately half the diameter of the sample tube 2. Thus, when the transition tube 4 is inserted into and centered within the sample tube 2, an annular cavity is formed between them, which serves as a self-cleaning air duct. The top of the annular cavity is sealed with a cap 6. The cap 6 can be a ring-shaped rubber cap with an air inlet 61 and an air outlet 62. The air outlet 62 is used to connect to the self-cleaning unit 5. To facilitate the installation of the rubber cap, it can be cut off. When sealing the annular cavity, it can be pried open, inserted into the annular cavity, and pressed tightly. A tight fit at the cut end satisfies the self-cleaning requirement.

[0028] The self-cleaning unit 5 can be a conventional small vacuum cleaner, including an air duct 51 and a suction power mechanism. One end of the air duct 51 is connected to the air outlet 62, and the other end is connected to the suction power mechanism. When the suction power mechanism is activated, it can draw air from the annular cavity, and the air inlet 61 of the annular rubber cover provides supplementary air. At the same time, the top opening of the transition tube 4 also serves as a supplementary air inlet. After a period of time, the powder in the sample tube 2 and the transition tube 4 can be completely drawn out. In addition, in order to increase the gas flow rate and improve the cleaning effect, the air inlet 61 can be opened to a smaller size.

[0029] In this embodiment, the base 11 is generally rectangular, and the upper and lower ends of the vertical plate 12 are fixedly connected to the same side of the base 11 and the top seat 13, respectively. To facilitate the fixing of the piston-type injector 3, the top seat 13 is designed with a through-hole in the middle and cubic structures on both sides, forming a central clearance space for fixing the injection unit 3. The cubic structures on both sides are hollow, which reduces the weight of the head and can also serve as mounting cavities for components such as the circuit board and the suction power mechanism of the self-cleaning unit 5. Of course, the circuit board and the suction power mechanism of the self-cleaning unit 5 can also be placed in the cavity of the base 11. The suction power mechanism of the self-cleaning unit 5 is fixed in the mounting cavity, and a through hole can be opened on the top seat 13 for the air duct 51 to pass through.

[0030] This embodiment utilizes a transition tube extending into the sample tube, along with its internal spiral channel, to allow powder to slowly enter the bottom of the sample tube. This prevents powder from splashing when poured in from the sample tube opening, and avoids the sample becoming loose at the bottom of the tube, which could affect the test results. During sample loading, there is no need to move or touch the sample tube, thus preventing it from breaking.

[0031] Furthermore, this embodiment uses a piston-type syringe to eject the powder, which can squeeze out excess air in the powder during the ejection process, giving the powder sample a certain degree of density. Then, as it slowly falls along the spiral channel, even if some loosening occurs, it can still meet the test requirements.

[0032] Furthermore, the self-cleaning unit is designed to automatically remove powder from the sample tube and transition tube, without affecting the accuracy of subsequent tests. In particular, the annular cavity between the sample tube and transition tube is sealed with an air inlet and outlet. The outlet connects to the air duct of the self-cleaning unit. When the self-cleaning unit is activated, air can be simultaneously supplied to the transition tube and the air inlet, thus cleaning both the transition tube and the sample tube simultaneously. This results in high cleaning efficiency without the need to disassemble the transition tube and sample tube.

[0033] Example 2 This embodiment describes a material specific surface area testing system, which uses the material sample loading device of Embodiment 1 for sample loading.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A material loading device, characterized in that, It includes a sample injection unit, a transition tube, and a sample tube; the transition tube includes a sample channel, the sample channel includes an inlet and an outlet, the transition tube extends into the sample tube, and the outlet is located inside the sample tube; the sample injection unit delivers the sample from the inlet into the sample channel, and the sample channel is spiral-shaped.

2. The material sample loading device according to claim 1, characterized in that, It also includes a self-cleaning unit; there is an annular cavity between the transition tube and the sample tube, the top of the annular cavity is sealed by a cap, the cap has an air inlet and an air outlet, and the self-cleaning unit is connected to the air outlet.

3. The material sample loading device according to claim 2, characterized in that, The cap is a ring-shaped rubber cap.

4. The material sample loading device according to claim 2 or 3, characterized in that, It also includes a frame, which includes a base, a top seat, and a vertical plate connecting the base and the top seat; multiple grippers are provided on the surface of the vertical plate for gripping the transition tube and the sample tube respectively.

5. The material loading device according to claim 4, characterized in that, The self-cleaning unit includes a vacuuming power mechanism and an air duct. One end of the air duct is connected to the vacuuming power mechanism, and the other end is connected to the air outlet.

6. The material loading device according to claim 5, characterized in that, The top seat includes a mounting cavity, the dust suction power mechanism is fixed inside the mounting cavity, and the side wall of the mounting cavity has a through hole for the air duct to pass through.

7. The material loading apparatus according to any one of claims 1 to 3, characterized in that, The sample tube includes a vertical tube and a container installed at the bottom of the vertical tube; the bottom end of the transition tube is located at the bottom of the vertical tube.

8. The material loading apparatus according to any one of claims 1 to 3, characterized in that, The injection unit is a piston-type syringe; the piston-type syringe has graduations on its tube wall.

9. The material loading device according to claim 8, characterized in that, The outlet of the piston-type syringe is connected to a flexible tube.

10. A material specific surface area testing system, characterized in that, Includes the material loading device as described in any one of claims 1 to 9.

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