Automatic positioning clamp for Joule thermal flash evaporation graphene equipment

Abstract

The invention discloses an automatic positioning clamp for Joule graphene thermal flash evaporation equipment, and relates to the technical field of graphene preparation, the automatic positioning clamp comprises a cross slide rail platform, a slide block, a transverse slide rail platform, a clamp, a laser positioning mechanism, a quartz tube diameter identification system, an information processing module and a control module; and the functions of positioning the quartz tubes with different diameters and precisely matching the quartz tubes with the electrodes are realized. Therefore, the problems that the automation degree of current equipment is low, the preparation process depends on manual operation, the efficiency is low, the requirement of large-scale production is difficult to meet, and the design of the current equipment has limitation in the aspect of pipe diameter adjustment and cannot adapt to the preparation requirements of graphene materials with different pipe diameters are solved. In addition, automation and flexibility are achieved through the cross-shaped sliding rail mechanism, the cross-shaped sliding rail mechanism has the advantages of being high in flexibility, stability and repeated positioning precision, convenient and fast to operate and the like, and the problem that the repeated positioning precision is poor due to multiple times of switching is solved.

Description

Technical Field

[0001] The invention relates to the technical field of graphene preparation, and in particular to an automatic positioning fixture for a Joule heat flash evaporation graphene device. Background Art

[0002] Graphene is the thinnest and strongest material known in the world [GEIM AK, NOVOSELOV K S. The rise of graphene [J]. Nature Materials, 2007, 6: 183-191. GEIM AK. Graphene: status and prospects [J]. Science, 2009, 324: 1530-1534.]. Graphene materials have unique and excellent properties in optics, electricity, mechanics, chemistry, etc. [ZHU Y, MURALI S, CAI W, et al. Graphene and Graphene Oxide: Synthesis, Properties, and Applications [J]. Advanced Materials, 2010, 22 (35): 3906-3924.], and have broad application prospects in energy science, materials science, environmental protection, and biomedicine [JANEGITZ BC, SILVATA, WONGA, et al. The application of graphene for in vitro and in vivo electrochemical biosensing [J]. Biosensors and Bioelectronics, 2017, 89 (Pt 1): 224-233. KUOK F, LIAO C, WAN T, et al. Atmospheric pressure plasma jet processed reduced graphene oxides for supercapacitor application [J]. Journal of Alloys and Compounds, 2017, 692: 558-562]. Joule thermal flash graphene technology is a technology that has emerged in recent years [Luong DX, Bets KV, Algozeeb WA, et al. Gram-scale bottom-up flash graphene synthesis [J]. ACS Nano, 2020, 577 (7792): 647-651. Stanford MG, Bets KV, Luong DX, et al. Flash Graphene Morphologies [J]. ACS Nano, 2020, 14 (10): 13691-13699.].Compared with the traditional tubular furnace heating activation technology, it has the advantages of simple activation method, short activation time, low energy consumption, low cost, high final temperature, fast heating and cooling speed, and convenient parameter adjustment [Wu Junchen. Research on the influence of metamorphic degree on the Joule thermal flash carbonization effect of bituminous coal [D]. China University of Mining and Technology, 2023.]. Therefore, it shows great potential in the rapid and efficient preparation of graphene materials. The Joule thermal flash graphene automation device includes a control module (working module), a charging module, an energy storage module, a discharge module, and a measurement module, and has functions such as program control, overload protection and alarm. Although Joule thermal flash technology has certain advantages in the field of graphene preparation, there are still some technical problems with existing equipment. First, the current equipment has limited automation, and the process of replacing the quartz tube relies on manual operation, which is inefficient and difficult to meet the needs of large-scale production. Secondly, the design of the existing equipment has limitations in the clamping of different pipe diameters, and cannot adapt to the preparation requirements of graphene materials with different pipe diameters, which limits its scope of application. The existence of these problems seriously affects the efficiency and flexibility of graphene preparation, and becomes a key obstacle to further improving the practical application value of this technology. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic positioning fixture for a Joule thermal flash graphene device to solve the problems existing in the above-mentioned prior art. It can realize adaptive adjustment of a quartz tube with a diameter of 8 to 30 mm without disassembling the device, and ensure the precise matching of the quartz tube and the electrode through a laser detection element.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The invention provides an automatic positioning fixture for a Joule thermal flash graphene device, comprising a cross slide platform, a slider, a transverse slide platform, a fixture, a laser positioning mechanism, a quartz tube diameter recognition system, an information processing module and a control module; the sliders are provided with two and are relatively arranged on the cross slide platform, the sliders are slidably connected with slider feed tracks arranged on both sides of the cross slide platform to achieve adjustment of the longitudinal position, electrodes are relatively arranged on the inner sides of the two sliders, the transverse slide platform is transversely arranged on the top of the cross slide platform and located between the two sliders, the transverse slide platform is controlled in height by a lifting frame, the fixture is arranged on the top of the transverse slide platform, a fixture feed track is transversely arranged inside the transverse slide platform, each of the fixtures comprises two clamping blocks arranged laterally opposite to each other, and the bottom of the clamping block is slidably connected to the fixture feed track; the laser positioning mechanism is used to coordinately locate the fixture and the electrode with the center of the cross slide platform as a reference, and coordinately locates the fixture and the electrode in sequence.

[0006] Preferably, the slider and the cross slide platform and the clamping block and the fixture feed track are all linear module structures driven by motors, and the position adjustment of the slider and the clamping block is achieved by controlling the motor drive through a control module.

[0007] Preferably, the two sliding blocks are symmetrically arranged.

[0008] Preferably, two electrodes are arranged on the inner side of each slider in a lateral direction, and the electrodes on the two sliders are opposite to each other in a longitudinal direction.

[0009] Preferably, two groups of the clamps are arranged between every two longitudinally opposite electrodes, the two groups of the clamps are spaced apart longitudinally and are identical transversely, and a centering reference line is arranged longitudinally on the clamp feed tracks of the two groups of the clamps, and the centering reference line is used for the clamp to fix the quartz tube at the center of the clamp feed track.

[0010] Preferably, the laser positioning mechanism comprises an X-direction precision positioning mechanism, a Y-direction precision positioning mechanism and a Z-direction precision positioning mechanism; the Z-direction precision positioning mechanism and the X-direction precision positioning mechanism are arranged on the transverse slide platform, and the Y-direction precision positioning mechanism is arranged on the slide block.

[0011] Preferably, the X-axis precise positioning mechanism comprises 8 X-axis in-position sensors, which are respectively arranged on a side of each of the clamps away from the slider, and the X-axis in-position sensors are used to detect whether the clamps are in place.

[0012] Preferably, the Z-axis precision positioning mechanism includes three Z-axis in-position sensors, two of which are arranged on one side edge of the transverse slide platform, and their longitudinal positions are aligned with the fixture, and the other Z-axis in-position sensor is arranged at the center of the other side edge of the transverse slide platform. The Z-axis in-position sensor is used to detect whether the transverse slide platform is in place and analyze whether the transverse slide platform is horizontal.

[0013] Preferably, the Y-axis precise positioning mechanism comprises two Y-axis in-position sensors, which are respectively arranged on the inner sides of the two sliders and located between the two electrodes, and the two electrodes are symmetrical with the Y-axis precise positioning mechanism as the center.

[0014] Preferably, it also includes horizontal adjustment bolts, which are arranged on the edges of both sides of the transverse slide rail platform.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention realizes the functions of positioning quartz tubes of different diameters and precisely matching with electrodes. After the quartz tube is precisely positioned with the fixture and precisely matched with the electrode, a Joule heat flash reaction is performed. This solves the problem that the current equipment has a low degree of automation, the preparation process relies on manual operation, the efficiency is low, and it is difficult to meet the needs of large-scale production. In addition, the design of existing equipment has limitations in adjusting the tube diameter, and it cannot adapt to the preparation requirements of graphene materials with different tube diameters, which limits its scope of application. In addition, the cross slide mechanism provided by the present invention realizes automation, and realizes flexibility through modular design and position sensors. It has the advantages of high flexibility, high stability, high repeatability, and convenient operation, and avoids the problem of poor repeatability due to multiple switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the automatic positioning fixture for the Joule heat flash evaporation graphene device in the present invention;

[0019] Figure 2 A top view of an automatic positioning fixture for a Joule heat flash graphene device in the present invention;

[0020] In the figure: 1. Cross slide mechanism; 2. Slider; 3. Electrode; 4. Fixture; 5. Lifting platform; 6. Fixture feed track; 7. Slider feed track; 8. Centering reference line; 9. X-axis in-position sensor; 10. Y-axis in-position sensor; 11. Z-axis in-position sensor; 12. Horizontal slide platform. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide an automatic positioning fixture for a Joule thermal flash evaporation graphene device to solve the problems existing in the prior art.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The Joule heat flash graphene device in this embodiment uses an automatic positioning fixture, such as Figure 1-Figure 2 As shown, it includes a cross slide platform, a slider 2, a transverse slide platform 12, a fixture 4, a laser positioning mechanism, a quartz tube diameter recognition system, an information processing module and a control module; two sliders 2 are provided and are relatively arranged on the cross slide platform, the sliders 2 are slidably connected to the slider feed tracks 7 arranged on both sides of the cross slide platform to realize the adjustment of the longitudinal position, the inner sides of the two sliders 2 are relatively arranged with electrodes 3, the transverse slide platform 12 is transversely arranged on the top of the cross slide platform and is located between the two sliders 2, the transverse slide platform 12 controls the height through the lifting frame, the fixture 4 is arranged on the top of the transverse slide platform 12, and the fixture feed track 6 is transversely arranged inside the transverse slide platform 12, each fixture 4 includes two clamping blocks arranged laterally opposite to each other, and the bottom of the clamping block is slidably connected to the fixture feed track 6; the laser positioning mechanism is used to coordinate the fixture 4 and the electrode 3 with the center of the cross slide platform as the reference, and the coordinate positioning of the fixture 4 and the electrode 3 is performed successively.

[0025] In this specific embodiment, the slider 2 and the cross slide platform and the clamping block and the fixture feed track 6 are all motor-driven linear module structures, and the position adjustment of the slider 2 and the clamping block is achieved by controlling the motor drive through the control module.

[0026] In this specific embodiment, the two sliders 2 are symmetrically arranged, and two electrodes 3 are arranged on the inner side of each slider 2 in a lateral direction, and the electrodes 3 on the two sliders 2 are opposite to each other in a longitudinal direction.

[0027] In this specific embodiment, two groups of clamps 4 are arranged between every two longitudinally opposite electrodes 3. The two groups of clamps 4 are spaced apart longitudinally and are identical in the transverse direction. A centering reference line 8 is arranged longitudinally on the clamp feed track 6 of the two groups of clamps 4. The centering reference line 8 is used for the clamp 4 to fix the quartz tube at the center of the clamp feed track 6.

[0028] In this specific embodiment, the laser positioning mechanism includes an X-axis precision positioning mechanism, a Y-axis precision positioning mechanism and a Z-axis precision positioning mechanism; the Z-axis precision positioning mechanism and the X-axis precision positioning mechanism are arranged on the transverse slide platform 12, and the Y-axis precision positioning mechanism is arranged on the slider 2.

[0029] In this specific embodiment, the X-axis precise positioning mechanism includes 8 X-axis in-position sensors 9, which are respectively arranged on a side of each clamp 4 away from the slider 2. The X-axis in-position sensors 9 are used to detect whether the position of the clamp 4 is in place.

[0030] In this specific embodiment, the Z-axis precision positioning mechanism includes three Z-axis in-position sensors, two of which are arranged on one side edge of the transverse slide platform 12, and the longitudinal position is aligned with the clamp 4, and the other Z-axis in-position sensor 11 is arranged at the center of the other side edge of the transverse slide platform 12. The Z-axis in-position sensor is used to detect whether the transverse slide platform 12 is in place and analyze whether the transverse slide platform 12 is horizontal.

[0031] In this specific embodiment, the Y-axis precise positioning mechanism includes two Y-axis in-position sensors 10, which are respectively arranged on the inner sides of the two sliders 2 and located between the two electrodes 3. The two electrodes 3 are symmetrical with the Y-axis precise positioning mechanism as the center.

[0032] In this specific embodiment, it also includes horizontal adjustment bolts, which are arranged on the edges of both sides of the transverse slide rail platform 12 to adjust the horizontality of the transverse slide rail platform 12.

[0033] The automatic positioning fixture 4 for the Joule heat flash evaporation graphene device of the present invention has the following working process:

[0034] The robot gripper transports the assembled quartz tube to the top of the cross slide mechanism 1, and identifies the diameter of the quartz tube through the quartz tube diameter recognition system. The information processing module transmits the information to the control module, adjusts the position of the fixture 4 and the lifting platform 5, and the laser precision positioning structure first positions the slide platform through the Z-axis in-place sensor 11, and then positions the quartz tube through the X-axis in-place sensor 9. The slider 2 starts to feed, and then the laser precision positioning structure positions the electrode 3 through the Y-axis in-place sensor 10. Make the electrode 3 and the quartz tube precisely matched. Start the reaction. Realize the entire assembly and matching process.

[0035] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic positioning fixture for Joule thermal flash evaporation graphene equipment, characterized in that: It includes a cross slide platform, a slider, a transverse slide platform, a fixture, a laser positioning mechanism, a quartz tube diameter recognition system, an information processing module and a control module; the sliders are provided with two and are relatively arranged on the cross slide platform, the sliders are slidably connected to the slider feed tracks arranged on both sides of the cross slide platform to realize the adjustment of the longitudinal position, the inner sides of the two sliders are relatively arranged with electrodes, the transverse slide platform is transversely arranged on the top of the cross slide platform and is located between the two sliders, the transverse slide platform is controlled in height by a lifting frame, the fixture is arranged on the top of the transverse slide platform, and a fixture feed track is transversely arranged inside the transverse slide platform, each of the fixtures includes two clamping blocks arranged laterally opposite to each other, and the bottom of the clamping block is slidably connected to the fixture feed track; the laser positioning mechanism is used to coordinately locate the fixture and the electrode based on the center of the cross slide platform, and coordinately locates the fixture and the electrode in sequence.

2. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 1, characterized in that: The slider and the cross slide platform and the clamping block and the fixture feed track are all linear module structures driven by motors, and the position adjustment of the slider and the clamping block is achieved by controlling the motor drive through a control module.

3. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 1, characterized in that: The two sliding blocks are symmetrically arranged.

4. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 1, characterized in that: Two electrodes are arranged on the inner side of each slider in a lateral direction, and the electrodes on the two sliders are opposite to each other in a longitudinal direction.

5. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 4, characterized in that: Two groups of the clamps are arranged between every two longitudinally opposite electrodes, the two groups of the clamps are spaced apart longitudinally and are identical transversely, and a centering reference line is arranged longitudinally on the clamp feed tracks of the two groups of the clamps, and the centering reference line is used for the clamp to fix the quartz tube at the center of the clamp feed track.

6. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 6, characterized in that: The laser positioning mechanism comprises an X-direction precision positioning mechanism, a Y-direction precision positioning mechanism and a Z-direction precision positioning mechanism; the Z-direction precision positioning mechanism and the X-direction precision positioning mechanism are arranged on the transverse slide rail platform, and the Y-direction precision positioning mechanism is arranged on the slide block.

7. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 6, characterized in that: The X-axis precise positioning mechanism includes 8 X-axis in-position sensors, which are respectively arranged on a side of each of the clamps away from the slider, and the X-axis in-position sensors are used to detect whether the clamps are in place.

8. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 6, characterized in that: The Z-axis precision positioning mechanism includes three Z-axis in-position sensors, two of which are arranged on one side edge of the transverse slide platform, and the longitudinal position is aligned with the fixture, and the other Z-axis in-position sensor is arranged at the center of the other side edge of the transverse slide platform. The Z-axis in-position sensor is used to detect whether the transverse slide platform is in place and analyze whether the transverse slide platform is horizontal.

9. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 1, characterized in that: The Y-axis precise positioning mechanism comprises two Y-axis in-position sensors, which are respectively arranged on the inner sides of the two sliders and between the two electrodes, and the two electrodes are symmetrical with the Y-axis precise positioning mechanism as the center.

10. The automatic positioning fixture for Joule thermal flash evaporation graphene equipment according to claim 1, characterized in that: It also includes horizontal adjustment bolts, which are arranged on the edges of both sides of the horizontal slide rail platform.

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