A step-by-step pressurizing device for a diamond anvil press

Abstract

The present invention discloses a step-by-step pressurizing device for a diamond anvil press, comprising a base plate, a wrench, a pressurizing control unit, and a diamond anvil press. The diamond anvil press is fixedly mounted on the base plate, and four arc-shaped grooves are provided on the base plate, each of which is provided with a limit tooth. Each arc-shaped groove corresponds to a pressure-adjusting bolt on the diamond anvil press. The pressurizing control unit comprises a hexagonal wrench, a sliding sleeve, a spring, and a limit foot. The wrench is L-shaped, with the horizontal section of the wrench inserted into the hexagonal wrench of the pressurizing control unit, and the vertical section of the wrench inserted into the top of the pressure-adjusting bolt of the diamond anvil press, so that the limit foot of the pressurizing control unit is located in the arc-shaped groove on the base plate. When applying pressure, two opposing wrenches are rotated simultaneously, causing the pressurizing control units of the two wrenches to move one limit tooth. Then, the other two opposing wrenches are rotated simultaneously, causing the pressurizing control units of the two wrenches to also move one limit tooth, completing one step-by-step pressurization.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical pressing devices, and in particular relates to a step-by-step pressing device for a diamond anvil press. Background Art

[0002] Materials exhibit unique properties under high pressure, making high-pressure experiments a common research method. Diamond anvil cells are a common high-pressure generating structure. Applying pressure to a pair of diamond anvils compresses a gasket placed between the anvils, generating high pressure within the sample chamber formed by the anvils and the gasket holes.

[0003] The four-column flat-bottomed diamond anvil press is a common pressure-applying device, but during use, the pressure-adjusting bolt is turned through the hexagonal plate entirely by feel, which can easily cause damage to the diamond anvil by applying too much pressure, and it is also impossible to achieve small step pressure application. An invention patent (patent number 201810304022.5) has developed a four-axis linkage pressure device based on the diamond anvil press. The device uses four motors to rotate the pressure-adjusting bolts at the same time, and pressurizes the sample by inputting the same torque. However, the device is large in size and cannot be placed on a micro-Raman stage. The device does not take into account the optical path channel for experimental detection, which is not convenient for spectral measurement of samples under high pressure. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a step-by-step pressurizing device for a diamond anvil press to achieve fine step-by-step pressurization during the use of the diamond anvil press.

[0005] The present invention is achieved through the following technical solutions:

[0006] A step-by-step pressurizing device for a diamond anvil press comprises a base plate, a wrench, a pressurizing control unit and a diamond anvil press;

[0007] The diamond anvil press is fixedly mounted on a base plate, on which four arc-shaped grooves are provided. Each arc-shaped groove has limit teeth arranged at equal intervals. Each arc-shaped groove corresponds to a pressure-adjusting bolt on the diamond anvil press, with the corresponding pressure-adjusting bolt as the center of the circle.

[0008] The pressurization control unit includes a hexagonal wrench, a support rod, a sliding sleeve, a spring and a limiting foot, wherein the hexagonal wrench is fixedly connected to the top of the support rod, the sliding sleeve is slidably sleeved on the bottom of the support rod, the limiting foot is fixedly installed at the bottom end of the sliding sleeve by a thread, and the spring is installed inside the sliding sleeve to provide a downward elastic force for the sliding sleeve; the bottom surface of the limiting foot is parallel to the tooth top surface of the limiting tooth on the bottom plate;

[0009] The wrench is an L-shaped hexagonal wrench, which includes a horizontal section and a vertical section that are perpendicular to each other. The horizontal section of the L-shaped hexagonal wrench is inserted into the hexagonal wrench sleeve of the pressure control unit, and the vertical section of the L-shaped hexagonal wrench is inserted into the top of the pressure adjusting bolt of the diamond anvil press, and the limit foot of the pressure control unit is located in the arc groove on the bottom plate.

[0010] In the above technical solution, the diamond anvil press is cylindrical, and is provided with four pressure-adjusting bolts for connection, and the four pressure-adjusting bolts are arranged at equal intervals around the circumference.

[0011] In the above technical solution, each limiting tooth includes a tooth top surface and a tooth side surface, the tooth top surface is an inclined surface, and the tooth side surface is a vertical surface.

[0012] In the above technical solution, a circular groove is provided in the center of the base plate for placing the diamond anvil press. Four threaded holes are provided on the circular groove. Correspondingly, four threaded holes are also provided at the bottom of the diamond anvil press. The diamond anvil press is fixed in the circular groove of the base plate by bolts.

[0013] In the above technical solution, the radial dimension of the limiting foot is smaller than the groove width of the arc groove on the bottom plate, so that the limiting foot can move stepwise in the arc groove of the bottom plate along the rising direction of the tooth top surface of the limiting tooth.

[0014] In the above technical solution, a circle of limiting flange is provided on the inner edge of the upper port of the sliding sleeve, and a limiting screw is installed at the bottom end of the support rod. The screw head of the limiting screw is located below the limiting flange of the sliding sleeve. The diameter of the screw head of the limiting screw is slightly smaller than the inner diameter of the sliding sleeve and larger than the inner diameter of the limiting flange of the sliding sleeve. The limiting screw forms a limiting effect on the limiting flange to prevent the sliding sleeve from falling off the support rod.

[0015] In the above technical solution, a threaded hole is provided at the bottom end of the support rod, and the limit screw is installed in the threaded hole.

[0016] In the above technical solution, the four arc-shaped grooves are connected end to end to form a flower pattern.

[0017] In the above technical solution, when the wrench is rotated, the wrench will drive the pressure regulating bolt to rotate, and at the same time drive the pressure control unit to move along the arc groove on the bottom plate. During this process, the limiting foot of the pressure control unit will rise along the tooth top slope of the limiting tooth in the arc groove, and the spring in the pressure control unit is compressed. When the limiting foot moves to the tooth top surface that is separated from the current limiting tooth, under the action of the compressed spring restoring force, the limiting foot will bounce into the tooth groove of the next limiting tooth, and the tooth side surface of the previous limiting tooth will block the limiting foot, thereby controlling the pressure control unit to move only along the rising direction of the tooth top slope of the limiting tooth. The size of the pressure value applied each time can be controlled by the number of teeth moved.

[0018] The method for applying pressure to the diamond anvil press using the above-mentioned step-by-step press device is as follows:

[0019] Four wrenches and four pressure control units are used. Each wrench is equipped with a pressure control unit and a pressure regulating bolt, and the four pressure control units are located in different arc grooves. Before pressure is applied, all pressure control units are located on the starting side of their corresponding arc grooves. When pressure is applied, two relative wrenches are rotated at the same time to move the pressure control units of the two relative wrenches by one limit tooth. Then, the other two relative wrenches are rotated at the same time to move the pressure control units of the two relative wrenches by one limit tooth, thereby completing one step of pressurization.

[0020] The advantages and beneficial effects of the present invention are:

[0021] The diamond anvil press stepping press device of the present invention has a simple structure, a rational design, and low cost, enabling precise stepping of pressurization during the use of the diamond anvil press. Furthermore, it is compact and does not obstruct the optical path of the diamond anvil press, facilitating high-pressure spectral measurements of samples on a microscopic Raman stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the step-by-step press device of the diamond anvil press of the present invention.

[0023] Figure 2 It is a structural diagram of a diamond anvil press.

[0024] Figure 3 It is a structural schematic diagram of the base plate in the present invention.

[0025] Figure 4 It is a perspective view of the pressurization control unit in the present invention.

[0026] Figure 5 It is a cross-sectional view of the pressurization control unit in the present invention.

[0027] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

[0029] Referring to the accompanying drawings, a step-by-step pressurizing device for a diamond anvil press includes a base plate 1 , a wrench 2 , a pressurizing control unit 3 and a diamond anvil press 4 .

[0030] The diamond anvil press 4 is cylindrical and is divided into two parts 4.1 and 4.2, which are connected by four pressure-adjusting bolts 4.3. The four pressure-adjusting bolts are arranged at equal intervals around the circumference. By adjusting these four pressure-adjusting bolts, the diamond anvil press generates pressure.

[0031] A circular groove 1.1 is provided in the center of the base plate 1 for placing the diamond anvil press 4. The circular groove is provided with four threaded holes 1.2. Correspondingly, four threaded holes 4.4 are also provided at the bottom of the diamond anvil press, so that the diamond anvil press can be fixed in the circular groove of the base plate by bolts. Four arc grooves 1.3 are provided on the base plate, each arc groove 1.3 has a limiting tooth m arranged at a medium interval, and each arc groove corresponds to a pressure regulating bolt 4.3 on the diamond anvil press, with the corresponding pressure regulating bolt as the center of the circle. Furthermore, each limiting tooth m includes a tooth top surface and a tooth side surface, the tooth top surface is an inclined surface, and the tooth side surface is a vertical surface.

[0032] The pressurization control unit 3 includes a hexagonal wrench sleeve 3.1, a support rod 3.2, a sliding sleeve 3.3, a spring 3.4 and a limit foot 3.5, wherein the hexagonal wrench sleeve 3.1 is fixedly connected to the top of the support rod 3.2, the sliding sleeve 3.3 is slidably sleeved on the bottom of the support rod 3.2, the limit foot 3.5 is fixedly installed on the bottom end of the sliding sleeve 3.3 by a thread, and the spring 3.4 is installed inside the sliding sleeve to provide a downward elastic force for the sliding sleeve; the bottom surface of the limit foot 3.5 is parallel to the tooth top surface of the limiting tooth m on the base plate 1, and the radial dimension of the limit foot is smaller than the groove width of the arc groove 1.3 on the base plate 1, so that the limit foot 3.5 can step along the rising direction of the tooth top surface of the limiting tooth in the arc groove 1.3 of the base plate 1. Furthermore, a limiting flange 3.31 is provided on the inner edge of the upper end of the sleeve 3.3, and a limiting screw 3.6 is installed at the bottom end of the support rod (a threaded hole is provided at the bottom end of the support rod 3.2, and the limiting screw is installed in the threaded hole). The screw head of the limiting screw is located below the limiting flange 3.31 of the sleeve. The diameter of the limiting screw head is slightly smaller than the inner diameter of the sleeve and larger than the inner diameter of the limiting flange of the sleeve. Therefore, the limiting screw forms a limiting effect on the limiting flange, preventing the sleeve from falling downward from the support rod. Furthermore, the spring 3.4 is located in the inner cavity of the sleeve between the limiting screw 3.6 and the limiting foot 3.5.

[0033] The wrench 2 is an L-shaped hexagonal wrench, which includes a horizontal section and a vertical section perpendicular to each other. The horizontal section of the L-shaped hexagonal wrench is inserted into the hexagonal wrench sleeve of the pressure control unit, and the vertical section of the L-shaped hexagonal wrench is inserted into the top of the pressure-adjusting bolt 4.3 of the diamond anvil press, and the limiting foot of the pressure control unit is located in the arc groove on the bottom plate. When the wrench is rotated, the wrench drives the pressure-adjusting bolt to rotate, and at the same time drives the pressure control unit to move along the arc groove on the bottom plate. In this process, the pressure control unit The limiting foot will rise along the tooth top inclined surface of the limiting tooth in the arc groove, and the spring in the pressure control unit will be compressed. When the limiting foot moves to the point where it is separated from the tooth top surface of the current limiting tooth, the limiting foot will be bounced into the tooth groove of the next limiting tooth under the action of the compressed spring restoring force. The tooth side surface of the previous limiting tooth will block the limiting foot, thereby controlling the pressure control unit to move only in the rising direction of the tooth top inclined surface of the limiting tooth. The size of the pressure value applied each time can be controlled by the number of teeth moved.

[0034] The method for applying pressure to the diamond anvil press using the above-mentioned step-by-step press device is as follows:

[0035] Four wrenches and four pressure control units are used. Each wrench is equipped with a pressure control unit and a pressure regulating bolt. The four pressure control units are respectively located in different arc grooves.

[0036] Before applying pressure, all pressure control units are located at the starting side of their corresponding arc grooves, and the starting side of the arc groove refers to the first limiting tooth in the arc groove on the opposite side of the rising inclination direction of the tooth top surface of the limiting tooth of the arc groove.

[0037] When applying pressure, rotate the two relative wrenches at the same time to move the pressure control units of the two relative wrenches by one limit tooth; then rotate the other two relative wrenches at the same time to move the pressure control units of the two relative wrenches by one limit tooth, thereby completing one step pressurization.

[0038] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0039] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0040] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A step-by-step pressurizing device for a diamond anvil press, characterized in that: It includes a base plate, a wrench, a pressurizing control unit and a diamond anvil press; The diamond anvil press is fixedly mounted on a base plate, on which four arc-shaped grooves are provided. Each arc-shaped groove has limit teeth arranged at equal intervals. Each arc-shaped groove corresponds to a pressure-adjusting bolt on the diamond anvil press, with the corresponding pressure-adjusting bolt as the center of the circle. The pressurization control unit includes a hexagonal wrench, a support rod, a sliding sleeve, a spring and a limiting foot, wherein the hexagonal wrench is fixedly connected to the top of the support rod, the sliding sleeve is slidably sleeved on the bottom of the support rod, the limiting foot is fixedly installed at the bottom end of the sliding sleeve by a thread, and the spring is installed inside the sliding sleeve to provide a downward elastic force for the sliding sleeve; the bottom surface of the limiting foot is parallel to the tooth top surface of the limiting tooth on the bottom plate; The wrench is an L-shaped hexagonal wrench, which includes a horizontal section and a vertical section that are perpendicular to each other. The horizontal section of the L-shaped hexagonal wrench is inserted into the hexagonal wrench sleeve of the pressure control unit, and the vertical section of the L-shaped hexagonal wrench is inserted into the top of the pressure-adjusting bolt of the diamond anvil press, and the limiting foot of the pressure control unit is located in the arc groove on the bottom plate; Each limiting tooth includes a tooth top surface and a tooth side surface, the tooth top surface is an inclined surface, and the tooth side surface is a vertical surface; When the wrench is rotated, the wrench will drive the pressure regulating bolt to rotate, and at the same time drive the pressure control unit to move along the arc groove on the bottom plate. During this process, the limit base foot of the pressure control unit will rise along the tooth top slope of the limit tooth in the arc groove, and the spring in the pressure control unit will be compressed. When the limit base foot moves to the tooth top surface that is out of the current limit tooth, under the action of the compressed spring restoring force, the limit base foot will bounce into the tooth groove of the next limit tooth, and the tooth side surface of the previous limit tooth will block the limit base foot, thereby controlling the pressure control unit to move only in the rising direction of the tooth top slope of the limit tooth. The size of the pressure value applied each time is controlled by the number of teeth moved.

2. The step-by-step pressurizing device for a diamond anvil press according to claim 1, characterized in that: The diamond anvil press is cylindrical and is provided with four pressure-adjusting bolts, which are arranged at equal intervals around the circumference.

3. The step-by-step pressurizing device for a diamond anvil press according to claim 1, characterized in that: A circular groove is provided in the center of the base plate for placing the diamond anvil press. Four threaded holes are provided on the circular groove. Correspondingly, four threaded holes are also provided at the bottom of the diamond anvil press. The diamond anvil press is fixed in the circular groove of the base plate by bolts.

4. The step-by-step pressurizing device for a diamond anvil press according to claim 1, characterized in that: The radial dimension of the limiting foot is smaller than the groove width of the arc groove on the bottom plate, so that the limiting foot can move stepwise in the arc groove of the bottom plate along the rising direction of the tooth top surface of the limiting tooth.

5. The step-by-step pressurizing device for a diamond anvil press according to claim 1, characterized in that: A circle of limiting flange is provided on the inner edge of the upper end of the sliding sleeve, and a limiting screw is installed at the bottom end of the support rod. The screw head of the limiting screw is located below the limiting flange of the sliding sleeve. The diameter of the screw head of the limiting screw is smaller than the inner diameter of the sliding sleeve and larger than the inner diameter of the limiting flange of the sliding sleeve. The limiting screw forms a limiting effect on the limiting flange to prevent the sliding sleeve from falling off the support rod downward.

6. The step-by-step pressurizing device for a diamond anvil press according to claim 5, characterized in that: A threaded hole is provided at the bottom end of the support rod, and the limit screw is installed in the threaded hole.

7. The step-by-step pressurizing device for a diamond anvil press according to claim 1, characterized in that: The four arc-shaped grooves are connected end to end to form a flower pattern.

8. A method for applying pressure to a diamond anvil press using the step-by-step pressurizing device for a diamond anvil press according to any one of claims 1 to 7, characterized in that: Four wrenches and four pressure control units are used. Each wrench is equipped with a pressure control unit and a pressure regulating bolt, and the four pressure control units are located in different arc grooves. Before pressure is applied, all pressure control units are located on the starting side of their corresponding arc grooves. When pressure is applied, two relative wrenches are rotated at the same time to move the pressure control units of the two relative wrenches by one limit tooth. Then, the other two relative wrenches are rotated at the same time to move the pressure control units of the two relative wrenches by one limit tooth, completing one step of pressurization.

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