A gas film pressure control device for a diamond anvil cell

Abstract

The utility model discloses a kind of gas membrane pressure control devices for diamond anvil cell pressure cavity, it is related to gas pressurization and pressure relief technical field, including device main body;Including box, box is divided into gas cylinder inflation area, pre-charging area and gas membrane area three areas, three areas are corresponding inflation, pre-pressing, gas membrane pressure control function, each area component is formed by air tube and joint Coherent gas path, the inside of box is fixedly installed with gas cylinder by bolt, one end of gas cylinder is connected with main air pipe, one end of main air pipe is connected with four-way joint A, and the upper joint of four-way joint A is connected with first air gauge by a air tube. After improvement, portability is greatly improved, can adapt to a variety of working environments, install air gauge, more convenient for detecting control air pressure, coil is more convenient for gas storage and stable air pressure, then through gas path, stable air pressure is delivered to gas membrane piece, test tube of air release port, can buffer the gas discharged, prevent harmful gas and high-pressure gas from hurting people.

Description

Technical Field

[0001] This utility model belongs to the field of gas pressurization and depressurization technology, specifically, it relates to a gas film pressure control device for a diamond anvil pressure chamber. Background Technology

[0002] The diamond anvil cell (DAC) is a core instrument in the field of high-pressure science. It generates static extreme pressures of millions of atmospheres (hundreds of GPa) through compression between anvils, making it a crucial tool for studying the physical and chemical properties of materials under extreme conditions. The DAC is currently the mainstream scientific device for generating ultra-high static pressure and is widely used in cutting-edge research in condensed matter physics, materials science, and earth sciences.

[0003] Existing DACs typically employ a "single-film structure" for pressurization and depressurization, meaning that the pressure drill is moved by the expansion / contraction of a single film. This technology presents the following technical challenges in its application:

[0004] Existing technologies of the same type require external gas cylinders for inflation and pressurization, which is not very portable. In addition, the gas path of this technology is relatively short, with the gas cylinder directly connected to the gas diaphragm. The gas pressure in the gas path is unstable, which may lead to unstable gas pressure in the gas diaphragm. Without a corresponding pressure gauge, it is impossible to accurately control the pressure in the gas path.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies.

[0006] Therefore, in order to solve the above problems, this utility model provides a gas film pressure control device for the pressure chamber of a diamond anvil. Utility Model Content

[0007] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a gas film pressure control device for a diamond anvil pressure chamber.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A gas film pressure control device for a diamond anvil chamber includes a housing divided into three areas: a gas cylinder filling area, a pre-filling area, and a gas film area. These three areas correspond to the functions of filling, pre-pressurizing, and gas film pressure control, respectively. Components in each area form a continuous gas path via branch pipes and connectors. A gas cylinder is bolted to the inside of the housing. One end of the gas cylinder is connected to a main gas pipe, and one end of the main gas pipe is connected to a four-way connector A. The upper connector of the four-way connector A is connected to a first pressure gauge via a branch pipe. The side connector of the four-way connector A is connected to a needle valve via another branch pipe. The other side connector of the four-way connector A is connected to a first precision metering valve via a branch pipe. One end of the first precision metering valve is connected to a three-way connector via a branch pipe. The connector has a tee connector with one side connected to a second pressure gauge via a bronchus pipe, and the other side connected to a coil for gas storage and pressure stabilization via a bronchus pipe. One end of the coil is connected to a second precision metering valve, and one side of the second precision metering valve is connected to a four-way connector B via a bronchus pipe. One side of the four-way connector B is connected to a pressure sensor via a bronchus pipe, and the other side of the four-way connector B is connected to a third precision metering valve via a bronchus pipe. One end of the third precision metering valve is connected to a pressure relief outlet clamping connector via a bronchus pipe, and one end of the pressure relief outlet clamping connector is connected to a test tube containing a reagent for gas detection, with the reagent level above the outlet end of the pressure relief outlet clamping connector.

[0010] As a preferred embodiment of this utility model, the air inlet of the needle valve is connected to a one-way valve through a branch pipe, and the air inlet of the one-way valve is connected to an inflation plate clamp connector through a branch pipe. One end of the inflation plate clamp connector extends through the box wall to the outside of the box.

[0011] As a preferred technical solution of this utility model, the four-way connector A, the first pressure gauge, the needle valve, the one-way valve and the inflation plate sleeve connector are all located in the gas cylinder inflation area on the box body.

[0012] As a preferred embodiment of this utility model, the three-way connector, the first precision metering valve, the second pressure gauge, and the coil are all located in the pre-charge area on the housing.

[0013] In a preferred embodiment of this invention, the length of the coil is 800 mm.

[0014] As a preferred technical solution of this utility model, the four-way connector B, the second precision metering valve and the third precision metering valve are all arranged in the air film area on the housing, wherein the second precision metering valve is an inflation metering valve and the third precision metering valve is an exhaust metering valve.

[0015] As a preferred technical solution of this utility model, one side of the four-way connector B is connected to a pressurized air inlet through-plate clamp connector via a branch pipe, and one end of the pressurized air inlet through-plate clamp connector extends through the box wall to the outside of the box.

[0016] As a preferred embodiment of this utility model, a digital display is installed on the top of the housing, and the digital display is electrically connected to the pressure sensor for real-time detection and display of the air pressure.

[0017] As a preferred embodiment of this utility model, handles are fixedly installed on both sides of the top of the box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In this invention, the portability is greatly improved, making it adaptable to various working environments. The installation of a pressure gauge makes it easier to detect and control the air pressure, while the coil facilitates air storage and pressure stabilization. The stable air pressure is then delivered to the air diaphragm through the air path. The test tube at the vent can buffer the discharged gas, preventing harmful gases and high-pressure gases from injuring people. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of this utility model after the box body has been removed.

[0024] Figure label:

[0025] 1. Housing; 2. Gas cylinder; 3. First pressure gauge; 4. Needle valve; 5. Check valve; 6. Inflation through-plate fitting; 7. First precision metering valve; 8. Second pressure gauge; 9. Coil; 10. Second precision metering valve; 11. Third precision metering valve; 12. Pressurized inlet through-plate fitting; 13. Depressurized outlet through-plate fitting; 14. Test tube; 15. Digital display; 16. Handle; 17. Pressure sensor. Detailed Implementation

[0026] The utility model will now be further described with reference to the accompanying drawings and specific embodiments:

[0027] Please see Figure 1 , Figure 2 and Figure 3 According to an embodiment of this utility model, a gas film pressure control device for a diamond anvil chamber includes a housing 1, which is divided into three areas: a gas cylinder filling area, a pre-filling area, and a gas film area. These three areas correspond to the functions of filling, pre-pressurizing, and gas film pressure control, respectively. The components in each area form a continuous air path through branch pipes and connectors. A gas cylinder 2 is bolted and installed inside the housing 1. One end of the gas cylinder 2 is connected to a main air pipe, and one end of the main air pipe is connected to a four-way connector A. The upper connector of the four-way connector A is connected to a first pressure gauge 3 through a branch pipe, and the side connector of the four-way connector A is connected to another... A needle valve 4 is connected to a bronchus tube. A first precision metering valve 7 is connected to the other end of the four-way connector A via a bronchus tube. The first precision metering valve 7 can precisely control the gas flow rate and pressure. One end of the first precision metering valve 7 is connected to a three-way connector via a bronchus tube. One end of the three-way connector is connected to a second pressure gauge 8 via a bronchus tube. The ranges of both the first pressure gauge 3 and the second pressure gauge 8 are 0-40 MPa. The other end of the three-way connector is connected to a coil 9 for gas storage and pressure stabilization via a bronchus tube. The coil 9 is used for gas storage and pressure stabilization. One end of the coil 9 is connected to a second... The first precision metering valve 10 precisely controls the gas flow rate and pressure. One side of the second precision metering valve 10 is connected to a four-way connector B via a branch pipe. One side of the four-way connector B is connected to a pressure sensor 17 via a branch pipe. The pressure sensor 17 monitors the gas pressure in real time, thereby improving the accuracy of pressure control. The other side of the four-way connector B is connected to a third precision metering valve 11 via a branch pipe. The third precision metering valve 11 precisely controls the gas flow rate and pressure. One end of the third precision metering valve 11 is connected to a pressure relief outlet through-plate sleeve via a branch pipe. One end of the pressure relief outlet gas venting fitting 13 is connected to a test tube 14. The test tube 14 contains a reagent for gas detection, and the reagent liquid level is above the gas outlet end of the pressure relief outlet gas venting fitting 13. The above components form a continuous gas path of "gas cylinder filling - pre-pressurization - gas film pressure control - pressure relief" through the branch pipe / fitting, thereby constructing the core gas path system of the gas film pressure control device, realizing the functions of gas storage, pre-filling, pressurization, pressure relief and detection, realizing the whole process pressure control from gas cylinder 2 filling to gas film pressurization, and meeting the requirements of the diamond anvil pressure chamber for gas film pressure stability and accuracy.

[0028] Please see Figure 3The air inlet of the needle valve 4 is connected to a one-way valve 5 through a branch pipe. The air inlet of the one-way valve 5 is connected to an inflation plate clamp connector 6 through a branch pipe. One end of the inflation plate clamp connector 6 extends through the wall of the box 1 to the outside of the box. The inflation plate clamp connector 6 provides an inflation interface for the gas cylinder 2 and prevents gas backflow through the one-way valve 5, ensuring that the inflation process is safe and controllable.

[0029] Please see Figure 1 and Figure 3 The four-way connector A, the first pressure gauge 3, the needle valve 4, the one-way valve 5, and the gas filling plate sleeve connector 6 are all located in the gas cylinder filling area on the housing 1. The modular partition design makes the gas circuit logic clear, which is convenient for assembly, maintenance and troubleshooting, enhances the compactness of the equipment structure, meets the "portability" design goal, and adapts to a variety of working environments.

[0030] Please see Figure 1 and Figure 3 The three-way connector, the first precision metering valve 7, the second pressure gauge 8, and the coil 9 are all located in the pre-charge area on the housing 1. The pre-charge area is set up independently, which makes it easy to accurately control the air pressure in the coil 9 through the first precision metering valve 7 and the second pressure gauge 8, so as to realize air storage and pressure stabilization. The coil 9 stabilizes the air pressure, avoids pressure fluctuations caused by the direct connection of the gas cylinder 2 to the gas diaphragm, and improves the stability of the gas diaphragm pressure.

[0031] Please see Figure 3 The length of coil 9 is 800mm, a standardized coil size, to ensure performance consistency between different devices and avoid voltage regulation failure due to coils that are too short.

[0032] Please see Figure 1 and Figure 3 The four-way connector B, the second precision metering valve 10, and the third precision metering valve 11 are all located in the air film area on the housing 1. The second precision metering valve 10 is an inflation metering valve, and the third precision metering valve 11 is an exhaust metering valve. This distinguishes the inflation and exhaust valves and avoids operational confusion. The pressure sensor 17 and the digital display 15 are integrated in the air film area to provide real-time feedback on the pressurization accuracy, enabling precise pressurization of the air film (the digital display 15 is accurate to three decimal places) and safe pressure relief, meeting the stringent pressure control requirements of high-pressure experiments.

[0033] Please see Figure 1 and Figure 3 One side of the four-way connector B is connected to a pressurized air intake through-plate fitting 12 via a branch pipe. One end of the pressurized air intake through-plate fitting 12 extends through the box wall of the box 1 to the outside of the box. The pressurized air intake through-plate fitting 12 provides an interface for external pressurization equipment, enhancing equipment compatibility.

[0034] Please see Figure 1 and Figure 3A digital display 15 is installed on the top of the housing 1. The digital display 15 is electrically connected to the pressure sensor 17 and is used to detect and display the air pressure in real time.

[0035] Please see Figure 1 The top of the housing 1 is fixedly equipped with handles 16 on both sides. The handles 16 improve the ease of handling the equipment and enhance its mobility. Combined with the built-in gas cylinder design, it can achieve "fill and go" and adapt to diverse working environments.

[0036] The working principle of a gas film pressure control device for a diamond anvil chamber is as follows: Before using the device, ensure that the first precision metering valve 7, the second precision metering valve 10, the third precision metering valve 11, and the needle valve 4 are in the closed state. Then, perform the inflation operation by opening the needle valve 4 and filling the gas cylinder 2 through the inflation plate clamp connector 6. A one-way valve 5 is provided in the gas circuit to prevent gas backflow. During inflation, observe the first pressure gauge 3 (0-40MPa). When the pressure reaches 25MPa, inflation is complete. Close the needle valve 4 and disconnect the inflation device to lock the gas. At this point, the device can be moved to any work location.

[0037] When using, pre-charging is required. Open the first precision metering valve 7, and confirm the air pressure in the 800mm coil 9 by observing the second air pressure gauge 8 (0-40MPa). The first precision metering valve 7 can accurately control the gas flow rate to achieve the air pressure standard. Close the first precision metering valve 7 to complete the pre-charging.

[0038] When pressurizing, the second precision metering valve 10 is opened to pressurize. This air path is connected to the pressure sensor 17 and the pressure is displayed on the digital display 15. The value can be accurate to three decimal places. The pressurization pressure can be precisely controlled by adjusting the second precision metering valve 10. After the required pressure is reached, the second precision metering valve 10 is closed.

[0039] When depressurizing, add reagent to test tube 14 until it covers the tube opening, and slowly open the third precision metering valve 11 until gas enters test tube 14. If the entire device needs to be vented, the third precision metering valve 11, the second precision metering valve 10, the first precision metering valve 7, and the needle valve 4 need to be opened slowly in sequence. Venting is complete when the reagent in test tube 14 no longer reacts.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas film pressure control device for a diamond anvil chamber, comprising a housing (1), characterized in that: The housing (1) is divided into three areas: a gas cylinder filling area, a pre-filling area, and a gas film area. The three areas correspond to the functions of filling, pre-pressurizing, and gas film pressure control, respectively. The components in each area form a continuous air path through the branch pipes and connectors. The gas cylinder (2) is fixedly installed inside the housing (1) by bolts. One end of the gas cylinder (2) is connected to a main air pipe. One end of the main air pipe is connected to a four-way connector A. The upper connector of the four-way connector A is connected to a first pressure gauge (3) through a branch pipe. The side connector of the four-way connector A is connected to a needle valve (4) through another branch pipe. The other side connector of the four-way connector A is connected to a first precision metering valve (7) through a branch pipe. One end of the first precision metering valve (7) is connected to a three-way connector through a branch pipe. One side connector of the three-way connector is connected to a second pressure gauge through a branch pipe. The pressure gauge (8) is connected to a coil (9) for gas storage and pressure stabilization via a bronch pipe on the other side of the three-way connector. One end of the coil (9) is connected to a second precision metering valve (10). One side of the second precision metering valve (10) is connected to a four-way connector B via a bronch pipe. One side of the four-way connector B is connected to a pressure sensor (17) via a bronch pipe. The other side of the four-way connector B is connected to a third precision metering valve (11) via a bronch pipe. One end of the third precision metering valve (11) is connected to a pressure relief outlet clamping connector (13) via a bronch pipe. One end of the pressure relief outlet clamping connector (13) is connected to a test tube (14). The test tube (14) contains a reagent for gas detection, and the reagent level is above the outlet end of the pressure relief outlet clamping connector (13).

2. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: The air inlet of the needle valve (4) is connected to a one-way valve (5) through a branch pipe. The air inlet of the one-way valve (5) is connected to an inflation plate clamp connector (6) through a branch pipe. One end of the inflation plate clamp connector (6) extends through the box wall of the box body (1) to the outside of the box.

3. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 2, characterized in that: The four-way connector A, the first pressure gauge (3), the needle valve (4), the one-way valve (5), and the gas cylinder filling area on the box (1) are all located in the gas cylinder filling area.

4. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: The three-way connector, the first precision metering valve (7), the second pressure gauge (8), and the coil (9) are all located in the pre-charge area on the housing (1).

5. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: The length of the coil (9) is 800 mm.

6. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: The four-way connector B, the second precision metering valve (10) and the third precision metering valve (11) are all located in the air film area on the housing (1), wherein the second precision metering valve (10) is an inflation metering valve and the third precision metering valve (11) is an exhaust metering valve.

7. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: One side of the four-way connector B is connected to a pressurized air intake through-plate fitting connector (12) via a bronch pipe. One end of the pressurized air intake through-plate fitting connector (12) extends through the box wall of the box body (1) to the outside of the box.

8. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: A digital display (15) is installed on the top of the housing (1). The digital display (15) is electrically connected to the pressure sensor (17) and is used to detect and display the air pressure in real time.

9. The air film pressure control device for the pressure chamber of a diamond anvil according to claim 1, characterized in that: The top of the box (1) is fixedly equipped with handles (16) on both sides.

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