In-situ pressurizing diamond anvil cell pressing machine

Abstract

The utility model provides an in-situ pressurization diamond anvil cell pressing machine which comprises a pressing machine cylinder and a pressing machine sleeve, the pressing machine cylinder and the pressing machine sleeve cover each other, a sealed installation space is formed between the pressing machine cylinder and the pressing machine sleeve, and a first anvil cell is installed on the bottom wall of the installation space; the piston is arranged in the installation space, a second anvil is installed at the end, close to the first anvil, of the piston, and the piston can move in the direction perpendicular to the bottom wall of the installation space; the inflation part comprises an inflation part and an extrusion part communicated with the inflation part, the interior of the extrusion part is hollow, the outer wall of the extrusion part is fixed to the end, away from the first anvil, of the piston, and the inflation part extends out of the mounting space. According to the in-situ pressurization diamond anvil cell pressing machine, in-situ pressurization is achieved, meanwhile, the structure is simple, assembling is convenient, and the assembling time can be effectively shortened.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of in-situ measurement of physical quantities, and particularly to an in-situ pressurized diamond anvil cell. Background Art

[0002] The diamond anvil cell (DAC) press experiment technology has become an important auxiliary means for modern frontier extreme environment scientific research. The pressure generated between its opposing anvils can reach several hundred GPa. It is currently the only scientific device that can generate static pressure of one million atmospheres and is the most important scientific instrument in the field of high-pressure science and technology research.

[0003] In the actual use process of the traditional diamond anvil cell (DAC) press, generally, the DAC is first pre-pressed to a certain fixed pressure value and then taken to another test environment for optical measurement and analysis. Such an isolated test process will lead to discontinuity in the observation of the sample and is very likely to cause the loss of important data. The traditional diamond anvil cell press is difficult to achieve in-situ pressurization. If it is to be achieved, an additional pressurization device is required, resulting in a complex press structure that is not easy to assemble. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an in-situ pressurized diamond anvil cell press to solve the above problems.

[0005] The present application provides an in-situ pressurized diamond anvil cell press, including:

[0006] A press cylinder and a press sleeve, the press cylinder and the press sleeve are mutually covered and a sealed installation space is formed therebetween, and a first anvil is installed on the bottom wall of the installation space;

[0007] A piston, the piston is arranged in the installation space, a second anvil is installed at one end of the piston close to the first anvil, and the piston is movable in a direction perpendicular to the bottom wall of the installation space;

[0008] An inflatable member, the inflatable member includes an inflation part and a squeezing part communicated with the inflation part. The inside of the squeezing part is hollow and the outer wall is fixed at one end of the piston away from the first anvil, and the inflation part extends out of the installation space.

[0009] According to the technical solution provided by the embodiment of the present application, the piston includes:

[0010] A piston column, the piston column is slidably connected with the side wall of the installation space, and the sliding direction is perpendicular to the bottom wall of the installation space; the second anvil is installed at the bottom end of the piston column;

[0011] The upper piston cover is connected to the top end of the piston column, and one end of the upper piston cover away from the piston column is fixedly connected to the extrusion part.

[0012] According to the technical solution provided by the embodiment of the present application, both the piston column and the upper piston cover are cylindrical. The diameter of the upper piston cover is larger than that of the piston column, and the upper piston cover and the piston column are connected by bolts.

[0013] According to the technical solution provided by the embodiment of the present application, the inner diameter of the press cylinder matches the diameter of the piston column, and the length of the part of the piston column extending into the press cylinder is greater than the diameter of the piston column.

[0014] According to the technical solution provided by the embodiment of the present application, a first cushion block is provided between the first anvil and the bottom wall of the installation space, and a second cushion block is provided between the second anvil and the bottom end of the piston column.

[0015] According to the technical solution provided by the embodiment of the present application, the first cushion block and the second cushion block are made of beryllium copper.

[0016] According to the technical solution provided by the embodiment of the present application, light-transmitting holes are provided on both the first cushion block and the second cushion block.

[0017] According to the technical solution provided by the embodiment of the present application, a light-transmitting hole with the same opening angle as that of the light-transmitting hole is provided at the position corresponding to the light-transmitting hole at the bottom of the press cylinder.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows: By providing a press cylinder and a press sleeve, a piston is arranged in the installation space formed by the press cylinder and the press sleeve. A first anvil and a second anvil are arranged between the piston and the bottom of the installation space. Then, by providing an inflatable part, the inflatable part includes an inflation part and an extrusion part. The inflation part inflates into the extrusion part, so that the extrusion part collides to extrude the piston to move, and further pressurizes the test piece between the first anvil and the second anvil in situ; By fixedly connecting the extrusion part to the piston, the extrusion part and the piston are of an integral structure, avoiding the need to additionally adjust the position of the extrusion part during installation, reducing the assembly time, and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more obvious:

[0020] Figure 1 It is a schematic external structure diagram of the in-situ pressurized diamond anvil press provided by the present application;

[0021] Figure 2 is Figure 1Schematic front view structure diagram of the in-situ pressure diamond anvil press shown;

[0022] Figure 3 is Figure 2 Schematic cross-sectional structure diagram of the in-situ pressure diamond anvil press shown in the A-A direction;

[0023] Figure 4 is Figure 1 Exploded view of the in-situ pressure diamond anvil press shown.

[0024] Reference numerals in the drawings: 1, press cylinder; 2, press sleeve; 3, first anvil; 4, piston; 5, second anvil; 6, inflating member; 7, inflating portion; 8, squeezing portion; 9, piston column; 10, piston upper cover; 11, bolt; 12, first cushion block; 13, second cushion block; 14, light-transmitting hole; 15, light-passing hole. Detailed implementation manners

[0025] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0027] Please refer to Figures 1-4 , the present application provides an in-situ pressure diamond anvil press, including:

[0028] A press cylinder 1 and a press sleeve 2, the press cylinder 1 and the press sleeve 2 are covered with each other and a sealed installation space is formed therebetween, and a first anvil 3 is installed on the bottom wall of the installation space;

[0029] A piston 4, the piston 4 is arranged in the installation space, a second anvil 5 is installed at one end of the piston 4 close to the first anvil 3, and the piston 4 is movable in a direction perpendicular to the bottom wall of the installation space;

[0030] An inflating member 6, the inflating member 6 includes an inflating portion 7 and a squeezing portion 8 communicated with the inflating portion 7, the inside of the squeezing portion 8 is hollow and the outer wall is fixed at one end of the piston 4 away from the first anvil (3), and the inflating portion 7 extends out of the installation space.

[0031] Specifically, the press cylinder 1 has a cylindrical structure with a hollow interior and an open end. The press sleeve 2 also has a cylindrical structure with a hollow interior and an open end. The diameter of the press sleeve 2 is larger than that of the press cylinder 1. After the press sleeve 2 and the press cylinder 1 are covered and fixed, a press housing is formed, and an installation space is formed inside. One end of the housing close to the press sleeve 2 is the top end, and one end of the housing close to the press cylinder 1 is the bottom end. The piston 4 is installed in the installation space. The piston 4 is movable in a direction perpendicular to the bottom surface of the installation space. A test space for placing the test piece is formed between the piston 4 and the bottom wall of the installation space. The first anvil 3 is installed on the bottom wall of the installation space, and the second anvil 5 is installed at one end of the piston 4 close to the bottom wall of the installation space. The test piece to be tested is fixed between the first anvil 3 and the second anvil 5. The inflating member 6 is used to apply pressure to the piston 4 after inflation. The inflating member 6 is composed of an inflating portion 7 and an extrusion portion 8 which are communicated. The extrusion portion 8 is a bladder with a variable volume after inflation. The inflating portion 7 is a tubular structure. One end of the inflating portion 7 is internally communicated with the extrusion portion 8. The extrusion portion 8 is arranged in the installation space, and one side surface thereof is fixedly connected to the top end of the piston 4, and the other side surface abuts against the top wall of the installation space. The inflating portion 7 extends out of the installation space through a through hole opened on the press sleeve 2. Optionally, the inflating member 6 is a pneumatic diaphragm.

[0032] During use, air is inflated into the extrusion portion 8 through the inflating portion 7, so that the volume of the extrusion portion 8 expands to squeeze the piston 4, and then the piston 4 squeezes downward to apply in-situ pressure to the test piece between the first anvil 3 and the second anvil 5, meeting the test requirements. Since the extrusion portion 8 is fixedly connected to the top end of the piston 4, there is no need to position and adjust the extrusion portion 8 during the installation of the press, which is convenient for installation.

[0033] Furthermore, the piston 4 includes:

[0034] A piston column 9, the piston column 9 is slidably connected to the side wall of the installation space, and the sliding direction is perpendicular to the bottom wall of the installation space. The second anvil 5 is installed at the bottom end of the piston column 9;

[0035] A piston upper cover 10, the piston upper cover 10 is connected to the top end of the piston column 9, and one end of the piston upper cover 10 away from the piston column 9 is fixedly connected to the extrusion portion 8.

[0036] Specifically, the piston 4 is composed of two parts, namely the piston column 9 and the piston upper cover 10. The side wall of the piston column 9 is in clearance fit with the inner wall of the press cylinder 1. The piston column 9 divides the installation space into two independently sealed parts, and the piston 4 moves within the installation space by the relative sliding of the piston column 9 and the inner wall of the press cylinder 1. The piston upper cover 10 is detachably connected to the piston column 9, and the connection between them is a snap connection. One end of the piston upper cover 10 away from the piston column 9 is fixed to the outer wall of the extrusion part 8.

[0037] Further, both the piston column 9 and the piston upper cover 10 are cylindrical. The diameter of the piston upper cover 10 is larger than that of the piston column 9, and the piston upper cover 10 and the piston column 9 are connected by bolts 11.

[0038] Specifically, after the piston upper cover 10 and the piston column 9 are connected, a T-shaped structure is formed. When no test piece is placed between the first anvil 3 and the second anvil 5, the piston upper cover 10 can be clamped to the end of the press cylinder 1 close to the press sleeve 2, so that the piston column 9 is in a suspended state, avoiding the contact and compression of the first anvil 3 and the second anvil 5, and increasing the service life of the internal structure of the press.

[0039] Further, the inner diameter of the press cylinder 1 matches the diameter of the piston column 9, and the length of the part of the piston column 9 extending into the press cylinder 1 is greater than the diameter of the piston column 9.

[0040] Specifically, the diameter of the piston column 9 is smaller than the length of the piston column 9 in the direction perpendicular to the bottom wall of the installation surface, so that the end face of the piston column 9 is smaller, making it easier to position the second anvil 5.

[0041] Further, a first cushion block 12 is provided between the first anvil 3 and the bottom wall of the installation space, and a second cushion block 13 is provided between the second anvil 5 and the bottom end of the piston column 9; the first cushion block 12 and the second cushion block 13 are made of beryllium copper.

[0042] Specifically, the first cushion block 12 and the second cushion block 13 are respectively used to install the first anvil 3 and the second anvil 5. Since both the first cushion block 12 and the second cushion block 13 are made of beryllium copper, beryllium copper has high hardness, elastic limit, fatigue limit and wear resistance, enabling the diamond anvil press provided by the present application to work in more extreme environments, such as low-temperature environments.

[0043] Further, light-transmitting holes 14 are provided on both the first cushion block 12 and the second cushion block 13; a light-passing hole 15 with the same opening angle as that of the light-transmitting hole 14 is formed at the bottom of the press cylinder 1 corresponding to the position of the light-transmitting hole 14.

[0044] Specifically, by providing the light-transmitting holes 14 on the first cushion block 12 and the second cushion block 13, and providing the light-passing hole 15 at the bottom of the press cylinder 1, when testing the optical performance of the test piece under a high-pressure environment, the external test light source can irradiate the test piece through the light-passing hole 15 and the light-transmitting hole 14.

[0045] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An in-situ pressurized diamond anvil press, characterized in that: include: A press cylinder (1) and a press sleeve (2), wherein the press cylinder (1) and the press sleeve (2) cover each other and form a sealed installation space therebetween, and a first anvil (3) is installed on the bottom wall of the installation space; A piston (4), the piston (4) being arranged in the installation space, a second anvil (5) being installed at one end of the piston (4) close to the first anvil (3), and the piston (4) being movable in a direction perpendicular to the bottom wall of the installation space; An inflatable member (6), the inflatable member (6) comprising an inflatable portion (7) and an extrusion portion (8) connected to the inflatable portion (7), the extrusion portion (8) being hollow inside and having an outer wall fixed to an end of the piston (4) away from the first anvil (3), and the inflatable portion (7) extending out of the installation space.

2. The in-situ pressurized diamond anvil press according to claim 1, characterized in that: The piston (4) comprises: A piston column (9), wherein the piston column (9) is slidably connected to the side wall of the installation space, and the sliding direction is perpendicular to the bottom wall of the installation space; the second anvil (5) is installed at the bottom end of the piston column (9); A piston upper cover (10), the piston upper cover (10) is connected to the top end of the piston column (9), and one end of the piston upper cover (10) away from the piston column (9) is fixedly connected to the extrusion portion (8).

3. The in-situ pressurized diamond anvil press according to claim 2, characterized in that: The piston column (9) and the piston cover (10) are both cylindrical, the diameter of the piston cover (10) is larger than the diameter of the piston column (9), and the piston cover (10) is connected to the piston column (9) via bolts (11).

4. The in-situ pressurized diamond anvil press according to claim 3, characterized in that: The inner diameter of the press cylinder (1) matches the diameter of the piston column (9), and the length of the portion of the piston column (9) extending into the press cylinder (1) is greater than the diameter of the piston column (9).

5. The in-situ pressurized diamond anvil press according to claim 4, characterized in that: A first cushion block (12) is provided between the first pressure anvil (3) and the bottom wall of the installation space, and a second cushion block (13) is provided between the second pressure anvil (5) and the bottom end of the piston column (9).

6. The in-situ pressurized diamond anvil press according to claim 5, characterized in that: The first cushion block (12) and the second cushion block (13) are made of beryllium copper.

7. The in-situ pressurized diamond anvil press according to claim 6, characterized in that: The first cushion block (12) and the second cushion block (13) are both provided with light-transmitting holes (14).

8. The in-situ pressurized diamond anvil press according to claim 7, characterized in that: A light-through hole (15) having the same opening angle as the light-through hole (14) is provided at a position on the bottom of the press cylinder (1) corresponding to the light-through hole (14).

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