Experimental sample tube

Abstract

The utility model discloses a sample tube for experiments, and belongs to the technical field of experimental instruments. Comprising a hollow guide pipe, a sample box, a sealing ring and a magnetic attraction block, and a plane plate extending outwards in the radial direction is arranged on the outer wall of one end of the hollow guide pipe; an opening is formed in the top of the sample box and right faces the surface plate, and the size of the opening is between the inner diameter of the hollow guide pipe and the size of the surface plate; the sealing ring is positioned between the surface plate and the opening; the magnetic attraction block is magnetically connected with the sample box, so that the sample box is attracted to move towards the surface plate, and the opening presses the sealing ring. The sample tube is divided into the hollow guide tube and the sample box, one end of the hollow guide tube is provided with the plane plate used for sealing the opening of the sample box, when the sample tube is used, a sample is directly placed from the opening of the sample box, and the size of the sample is not limited by the size of the hollow guide tube, so that a large-size sample can be placed; meanwhile, the sample box and the surface plate are connected through magnetic attraction, so that the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to a nitrogen adsorption method specific surface area determination and pore size analysis experiment, and specifically is a sample tube for the experiment. Background Art

[0002] In geological core analysis, it is often necessary to determine the specific surface area and pore size of core samples by nitrogen adsorption method. Currently, conventional sample tubes such as Figure 1 As shown, it includes a conduit and an expansion portion at one end of the conduit. The conduit and the expansion portion are integrally formed. The expansion portion is used to store samples, and the conduit is connected to the air pipe so that nitrogen is input into the expansion portion. The expansion portions of different sample tubes are different to accommodate different amounts of samples (from the measurement principle, a small amount of sample can also use a sample tube with a larger expansion portion, but this will increase the gas phase space in the sample tube, thereby increasing the load of vacuuming during the experiment and increasing the amount of nitrogen consumed. Therefore, the sample tube is usually selected based on the sample amount). The conduit size of all sample tubes is the same to facilitate connection with the air pipe. When placing a core sample into the sample tube, the core sample needs to pass through the conduit, which limits the size of the core sample. Larger samples are difficult to pass through the conduit and require further processing, such as crushing, which destroys the original physical structure of the core sample and affects the accuracy of the test results. Utility Model Content

[0003] In order to solve the above problems, the present invention provides a sample tube for an experiment. The present invention splits the sample tube and directly puts the sample into a sample box without passing through a conduit. Therefore, the sample size is not limited.

[0004] The specific scheme of the utility model is as follows:

[0005] Sample tubes for experiments, including:

[0006] A hollow conduit, wherein an outer wall of one end of the hollow conduit is provided with a planar plate extending radially outward;

[0007] A sample box, wherein the top of the sample box is provided with an opening, the opening is directly facing the flat plate, and the size of the opening is between the inner diameter of the hollow tube and the size of the flat plate;

[0008] a sealing ring, located between the plane plate and the opening, and used for sealing a gap between the plane plate and an upper edge of the opening;

[0009] A magnetic block is magnetically attracted to the sample box, thereby attracting the sample box to move toward the flat plate, so that the opening presses the sealing ring.

[0010] As a specific embodiment of the present invention, the size of the opening is not less than the inner diameter of the sample box, so as to facilitate the loading of large-sized samples.

[0011] As a specific implementation of the present invention, the sealing ring is fixed on the flat plate, so that it is convenient to replace the sample box.

[0012] As a specific implementation of the present invention, the outer wall of the hollow conduit is provided with a thread, and the magnetic block is threadedly connected to the hollow conduit, so that the sample box is easily installed.

[0013] As a specific embodiment of the present invention, the opening of the sample box extends radially along the sample box to form an annular boss, thereby increasing the contact area with the sealing ring and improving the sealing performance.

[0014] Furthermore, the opening of the sample box extends radially outwards along the sample box.

[0015] Compared with the existing technology, it has the following advantages:

[0016] The utility model divides the sample tube into two parts: a hollow conduit and a sample box. A flat plate is provided at one end of the hollow conduit for sealing the opening of the sample box. When in use, the sample is directly placed in through the opening of the sample box. The sample size is not limited by the size of the hollow conduit, so large samples can be placed in, avoiding the impact of crushed samples on the accuracy of the test results. At the same time, the sample box and the flat plate are connected by magnetic attraction, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of two experimental sample tubes in the prior art;

[0018] Figure 2 Schematic diagram of the overall structure of the sample tube used in the experiment in Example 1;

[0019] Figure 3 1 is a top view of the magnetic block in Example 1;

[0020] Figure 4 This is a front view of the sample box in Example 1;

[0021] Figure 5 A quarter cross-sectional view of the hollow conduit in Example 1;

[0022] Figure 6 A quarter cross-sectional view of a sample box that can be used in Example 1;

[0023] In the figure, there is a hollow tube 100 ; a sample box 200 ; a sealing ring 300 ; a magnetic block 400 ; a flat plate 110 ; an opening 210 ; and an annular boss 211 . DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0025] Before describing the present invention in detail, it is necessary to introduce the existing sample tubes. Please refer to Figure 1 Existing sample tubes consist of a conduit and an expansion section, both integrally formed. When adding a sample, the sample must pass through the conduit to enter the expansion section. Consequently, the sample size is limited by the size of the conduit, making it unsuitable for large samples. While large samples can pass through the conduit after being crushed, the crushing process damages the sample's pore structure, resulting in distorted measured specific surface area and porosity. The present utility model addresses this shortcoming.

[0026] Example 1

[0027] Please refer to Figures 2 to 6 , which shows the structure of a specific embodiment of the experimental sample tube of the present invention. The present invention includes a hollow tube 100, a sample box 200, a sealing ring 300, and a magnetic block 400. The outer wall of one end of the hollow tube 100 is provided with a flat plate 110 extending radially outward. The top of the sample box 200 is provided with an opening 210, which faces the flat plate 110. The size of the opening 210 is between the inner diameter of the hollow tube 100 and the size of the flat plate 110. Therefore, the flat plate 110 can be used to seal the opening 210. The sealing ring 300 is located between the flat plate 110 and the opening 210, and is used to seal the gap between the flat plate 110 and the upper edge of the opening 210 to prevent external air from entering the sample box 200 when the sample box 200 is vacuumed. The magnetic block 400 is magnetically connected to the sample box 200, thereby attracting the sample box 200 to move toward the flat plate 110, so that the opening 210 presses against the sealing ring 300.

[0028] When the present invention is used, the sample is first placed directly into the sample box 200 through the opening 210 of the sample box. The sample size is not limited by the size of the hollow conduit 100, so large samples can be placed in it, avoiding sample crushing that affects the test accuracy.

[0029] In order to facilitate the loading of large-sized samples, or in other words, to avoid the size of the opening 210 limiting the access to the sample, the size of the opening 210 is not less than the inner diameter of the sample box 200, so as to facilitate the loading of large-sized samples. Figure 6 Similarly, the sample box 200 has an inner wall of constant diameter, or the inner diameter of the sample box 200 gradually decreases along the opening inward.

[0030] In the present invention, the sample box 200 and the flat panel 110 are connected by magnetic attraction to facilitate installation and disassembly. When in use, a suitable sample box 200 can be selected according to the sample size or amount, which can reduce the gas phase space in the sample box 200 and thus save nitrogen. In addition, the sealing ring 300 can be fixed on the flat panel 110, for example, by adhering it to the flat panel 110 with liquid glue. In this way, there is no need to disassemble the sealing ring 300 during installation and disassembly. At the same time, the inner diameter of the sealing ring 300 is equal to the inner diameter of the hollow tube 100, and the outer diameter is equal to the outer diameter of the flat panel 110, so as to accommodate sample boxes of different sizes.

[0031] In the present invention, the sample box 200 and the flat panel 110 are connected by magnetic attraction. In specific implementation, the sample box 200 can be prepared by metal material, and the magnet can be built into the magnetic block 400 to form magnetic attraction. It is known that the greater the magnetic force between the magnetic block 400 and the sample box 200, the more conducive it is to the sealing between the sample box 200 and the flat panel 110, but the greater the magnetic force, the more difficult it is to separate the sample box 200 and the flat panel 110. Therefore, in some embodiments, the outer wall of the hollow conduit 100 is provided with a thread, and the magnetic block 400 is threadedly connected to the hollow conduit 100. In this way, the magnetic force between the magnetic block 400 and the sample box 200 can be changed by rotating the magnetic block 400, which is convenient for installation and disassembly.

[0032] In addition, in order to further enhance the sealing performance between the opening 210 of the sample box 200 and the flat plate 110, in this embodiment, the opening 210 of the sample box extends radially outward along the sample box 200 to form an annular boss 211, thereby increasing the contact area between the opening 210 and the sealing ring 300 and improving the sealing performance.

[0033] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the embodiments of the present invention should be covered by the protection scope of the present invention.

Claims

1. Experimental sample tube, characterized in that: include: A hollow conduit, wherein an outer wall of one end of the hollow conduit is provided with a planar plate extending radially outward; A sample box, wherein the top of the sample box is provided with an opening, the opening is directly facing the flat plate, and the size of the opening is between the inner diameter of the hollow tube and the size of the flat plate; a sealing ring, located between the plane plate and the opening, and used for sealing a gap between the plane plate and an upper edge of the opening; A magnetic block is magnetically attracted to the sample box, thereby attracting the sample box to move toward the flat plate, so that the opening presses the sealing ring.

2. The experimental sample tube according to claim 1, characterized in that: The size of the opening is not less than the inner diameter of the sample box.

3. The experimental sample tube according to claim 1, characterized in that: The sealing ring is fixed on the plane plate.

4. The experimental sample tube according to claim 1, characterized in that: The outer wall of the hollow conduit is provided with a thread, and the magnetic block is threadedly connected to the hollow conduit.

5. The experimental sample tube according to claim 1, characterized in that: The opening of the sample box extends radially along the sample box to form an annular boss.

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