A manual horizontal reaction clamp based on joule heat

Abstract

The utility model belongs to nanometer material technical field provides a kind of manual horizontal reaction clamp based on joule heat, including support frame, electrode assembly A, electrode assembly B and screw drive mechanism, support frame includes base, support plate and multiple connecting columns, support plate is fixed on the top of base by multiple connecting columns, and the length direction of support plate is equipped with rectangular guide hole.Electrode assembly A and electrode assembly B all include conducting seat and cylindrical electrode head, wherein the conducting seat of electrode assembly A is located on the support plate above guide hole, the conducting seat of electrode assembly B is fixed on the support plate of guide hole one end, two electrode heads are used to clamp insulating sleeve, and electrode head has multiple specifications.Screw drive mechanism is fixed below support plate, and screw drive mechanism is fixedly connected with the conducting seat of electrode assembly A through guide hole.The utility model can flexibly match multiple sizes of insulating sleeve, without customizing dedicated clamp for single specification sleeve.

Description

Technical Field

[0001] This invention belongs to the field of nanomaterials technology and provides a manually operated horizontal reaction fixture based on Joule heating. Background Technology

[0002] Flash Joule heating technology, with its instantaneous heating in the order of seconds or even milliseconds, high heating and cooling rates of 10³ K / s, and reaction temperatures exceeding 3000 K, provides unique non-equilibrium thermal conditions for the synthesis of new materials in the field of nanomaterial preparation, making it an important material processing method. This technology requires loading the conductive powder to be reacted into an insulating sleeve such as a quartz tube, and pressing the sleeve together with conductive electrodes on both sides to form a stable current loop to generate Joule heating. Simultaneously, the insulating sleeve requires support from conductive clamps due to the high temperature (2000–3000 °C) during the reaction; therefore, a dedicated reaction clamp is one of the core pieces of equipment for the successful conduct of flash Joule heating experiments.

[0003] In the existing technology, the fixture design for flash Joule heating experiments has obvious limitations in terms of specificity: because different reactants and different experimental schemes require matching insulating sleeves of different diameters and lengths, research institutions usually need to customize exclusive reaction fixtures for each specification of insulating sleeve. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a manual horizontal reaction fixture based on Joule heating, which can flexibly match various sizes of insulating sleeves without requiring custom fixtures for single-specification sleeves.

[0005] The technical solution of this utility model includes: The support frame includes a base, a support plate, and multiple connecting columns. The support plate is fixed above the base by the multiple connecting columns, and the support plate has rectangular guide holes along its length.

[0006] Electrode assembly A and electrode assembly B both include a conductive base and a cylindrical electrode head. The electrode head is detachably electrically connected to the conductive base. The conductive base of electrode assembly A is located on a support plate above the guide hole, while the conductive base of electrode assembly B is fixed on a support plate at one end of the guide hole. The two electrode heads are used to clamp the insulating sleeve, and the electrode heads are available in various specifications to match insulating sleeves of different diameters.

[0007] The lead screw drive mechanism is fixed below the support plate. The lead screw drive mechanism passes through the guide hole and is fixedly connected to the conductive seat of the electrode assembly A, and is used to drive the electrode assembly A to slide along the length direction of the guide hole.

[0008] Furthermore, the conductive base includes a pad, an electrode base, and an electrode plate. The electrode base is fixed on the pad, and the electrode plate is detachably connected to the electrode base. The electrode plate is provided with a connection hole, and the electrode head is connected to the connection hole. The electrode base, the electrode plate, and the electrode head are electrically connected. The two electrode bases are electrically connected to the positive and negative terminals of the power supply, respectively.

[0009] Furthermore, it also includes a conductive plate, which is used to place non-conductive or highly resistive substances to be reacted; the two ends of the conductive plate are detachably clamped between the electrode base and the electrode plate of electrode assembly A and electrode assembly B, respectively.

[0010] Furthermore, anti-slip textures are provided on the opposing surfaces of the electrode holder and the electrode plate.

[0011] Furthermore, the electrode head is threadedly connected to the conductive base.

[0012] Furthermore, an insulating partition is provided between the pad and the electrode holder.

[0013] Furthermore, the lead screw transmission mechanism includes a lead screw, a handwheel, a slider, and a connecting plate. The lead screw is suspended below the support plate through the connecting plate, and the lead screw is rotatably connected to the connecting plate. The slider is sleeved on the lead screw and is rotatably connected to the lead screw. The slider is located in the guide hole and is connected to the pad of the electrode assembly A. The handwheel is connected to one end of the lead screw.

[0014] The technical solution provided by this utility model has the following advantages compared with the prior art: Select a suitable electrode head based on the inner diameter of the insulating sleeve and connect it to the conductive base. Then, adjust the position of electrode assembly A relative to electrode assembly B via a lead screw drive mechanism according to the length of the insulating sleeve, thereby adjusting the distance between the electrode heads so that the gap between the electrode heads before clamping the insulating sleeve is greater than the length of the insulating sleeve. Then, fit one end of the insulating sleeve onto one of the electrode heads, and coaxially with the other end of the insulating sleeve. At this point, adjust the position of electrode assembly A relative to electrode assembly B again via the lead screw drive mechanism, gradually reducing the distance between the electrode heads, allowing the other electrode head to enter the insulating sleeve. Then, apply electricity, and generate Joule heat to process the reactant inside the insulating sleeve through the current loop. Compared with the prior art, this utility model can flexibly match insulating sleeves of various sizes without the need to customize a special clamp for a single specification of sleeve.

[0015] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0017] Figure 1 This is a perspective view of a manually operated horizontal reaction fixture according to one embodiment of the present invention.

[0018] Figure 2 This is a front view of a manually operated horizontal reaction fixture according to one embodiment of the present invention.

[0019] Figure label: 1. Base; 2. Support plate; 3. Connecting post; 4. Guide hole; 5. Electrode head; 6. Pad; 7. Electrode seat; 8. Electrode plate; 9. Lead screw; 10. Handwheel; 11. Connecting plate; 12. Slider; 13. Terminal block. Detailed Implementation

[0020] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] like Figure 1 and Figure 2 As shown, a manually operated horizontal reaction fixture based on Joule heating is characterized by comprising: The support frame includes a base 1, a support plate 2 and multiple connecting columns 3. The support plate 2 is fixed above the base 1 by the multiple connecting columns 3. The support plate 2 has rectangular guide holes 4 along its length. Electrode assembly A and electrode assembly B both include a conductive base and a cylindrical electrode head 5. The electrode head 5 is detachably electrically connected to the conductive base. The conductive base of electrode assembly A is located on the support plate 2 above the guide hole 4, and the conductive base of electrode assembly B is fixed on the support plate 2 at one end of the guide hole 4. The two electrode heads 5 are used to clamp the insulating sleeve, and the electrode heads 5 are available in various specifications to match insulating sleeves of different diameters. The lead screw 9 transmission mechanism is fixed below the support plate 2. The lead screw 9 transmission mechanism passes through the guide hole 4 and is fixedly connected to the conductive seat of the electrode assembly A, and is used to drive the electrode assembly A to slide along the length direction of the guide hole 4.

[0024] The distance between electrode assembly A and the fixed electrode assembly B can be flexibly adjusted by the "lead screw 9 transmission mechanism driving electrode assembly A to slide along guide hole 4", adapting to insulating sleeves of different lengths. The "detachable connection between electrode head 5 and conductive base + multiple specifications of electrode head 5" allows for matching insulating sleeves of different diameters, eliminating the need for customized fixtures, significantly shortening the experimental preparation cycle and reducing equipment costs. A stable reaction base framework is constructed: the support frame (base 1 + support plate 2 + connecting column 3) forms a rigid support, preventing fixture wobbling during the reaction; the guide hole 4 restricts the sliding direction of electrode assembly A, ensuring the coaxial alignment of the two electrode heads 5, guaranteeing stable clamping of the insulating sleeve, and preventing poor contact in the current loop.

[0025] The base 1, support plate 2, connecting column 3, lead screw 9, handwheel 10, slider 12, and connecting plate 11 are made of AL6061 aluminum alloy (lightweight and structurally stable); the conductive seat and electrode head 5 of the electrode assembly are made of H96 brass (high conductivity, high temperature resistance, suitable for reaction temperatures of 2000℃ to 3000℃).

[0026] Add a wear-resistant bearing (such as a deep groove ball bearing) to the rotating connection between the lead screw 9 and the connecting plate 11 to reduce transmission friction and improve the accuracy of the spacing adjustment; or attach a polytetrafluoroethylene wear-resistant coating to the inner wall of the guide hole 4 to reduce the sliding resistance of the slider 12.

[0027] Electrode head 5 is used to clamp one end of the insulating sleeve. It can be processed into a "cylindrical + chamfered" structure to avoid the sharp end scratching the insulating sleeve (such as a quartz tube); or a thin graphite pad can be wrapped around the clamping end of electrode head 5 to enhance the conductive contact with the plug inside the insulating sleeve.

[0028] In the embodiments provided by this utility model, the conductive base includes a pad 6, an electrode base 7, and an electrode plate 8. The electrode base 7 is fixed on the pad 6, and the electrode plate 8 is detachably connected to the electrode base 7. The electrode plate 8 is provided with a connection hole, and the electrode head 5 is connected to the connection hole. The electrode base 7, the electrode plate 8, and the electrode head 5 are electrically connected to each other. The two electrode bases 7 are electrically connected to the positive and negative terminals of the power supply, respectively.

[0029] The conductive base is divided into "pad 6 + electrode base 7 + electrode plate 8", clearly defining the electrical connection link of "electrode base 7 → electrode plate 8 → electrode head 5" to avoid current conduction interruptions and ensure a stable current supply for the Joule heating reaction. The electrode plate 8 is detachably connected to the electrode base 7. When the electrode plate 8 or electrode head 5 is worn, the damaged part can be replaced individually without replacing the entire conductive base, reducing maintenance costs. The connection hole provides precise installation positioning for the electrode head 5, preventing poor circuit contact caused by electrode head 5 misalignment. Each of the two electrode bases 7 has a terminal 13, through which the positive and negative terminals of the power supply are connected respectively.

[0030] The detachable connection between the electrode plate 8 and the electrode base 7 can adopt a "quick snap + conductive contact" structure in addition to conventional bolt connection, which can be disassembled and assembled without tools, further improving maintenance efficiency.

[0031] Apply conductive paste (such as silver-based conductive paste) to the contact surface between the electrode holder 7 and the electrode plate 8 to reduce contact resistance and reduce additional heat loss during current transmission; or embed a copper conductive core in the electrode holder 7 to enhance overall conductivity.

[0032] In the embodiments provided by this utility model, a conductive plate is also included. The conductive plate is used to place non-conductive or high-resistance substances to be reacted. The two ends of the conductive plate are detachably clamped between the electrode base 7 and the electrode plate 8 of the electrode assembly A and the electrode assembly B, respectively.

[0033] By sandwiching a conductive plate between electrode holder 7 and electrode plate 8, Joule heating of non-conductive or highly resistive reactants is achieved, filling the gap in existing fixtures that can only handle conductive powders and expanding the research scope of flash Joule heating technology. The conductive plate is clamped at both ends by electrode holder 7 and electrode plate 8 to prevent current circuit interruption caused by plate displacement during the reaction; the detachable design allows for the replacement of conductive plates of different materials according to the properties of the substance, adapting to diverse experimental needs.

[0034] The conductive plate is preferably carbon felt, but graphite plate (high temperature resistance, stable conductivity), carbon fiber composite plate (lightweight, high strength), and metal mesh (such as copper mesh, suitable for thin sheet-like reactants) can also be used.

[0035] A rectangular positioning groove is machined on the opposite surfaces of the electrode holder 7 and the electrode plate 8. The conductive plate is embedded in the positioning groove to further prevent slippage, enhance the fit between the conductive plate and the electrode holder 7 / electrode plate 8, and reduce contact resistance.

[0036] In the embodiments provided by this utility model, anti-slip textures are provided on the opposing surfaces of the electrode holder 7 and the electrode plate 8.

[0037] The anti-slip texture increases the friction between the electrode holder 7, the electrode plate 8, and the conductive plate, preventing the conductive plate from sliding or the electrode plate 8 from loosening during the reaction (e.g., due to current surges or slight vibrations), ensuring a stable current circuit and improving the repeatability of experimental results. The anti-slip texture is a physically optimized structure, eliminating the need for additional anti-slip components, and is suitable for reaction temperatures ranging from 2000℃ to 3000℃, preventing the anti-slip structure from failing.

[0038] Anti-slip texture options include: stripes, diamonds (to increase contact area), and grids (to evenly distribute friction).

[0039] Alternatively, thin silicon carbide wear-resistant sheets (high temperature resistant, high coefficient of friction) can be pasted on the contact surface between the electrode holder 7 and the electrode plate 8 to achieve the same anti-slip effect and facilitate the replacement of worn wear-resistant sheets.

[0040] In the embodiments provided by this utility model, the electrode head 5 is threadedly connected to the conductive seat.

[0041] The threaded connection allows for manual assembly and disassembly without special tools, facilitating quick and easy replacement of electrode heads 5 of different specifications (compatible with insulating sleeves of different diameters). Simultaneously, the tight thread fit ensures a stable electrical connection between the electrode head 5 and the conductive base, preventing interruptions in current transmission. The threaded connection is rigid, without elastic components (such as snap-fit ​​springs), and will not loosen due to component aging at high reaction temperatures of 2000℃ to 3000℃, thus extending the service life of the clamp.

[0042] In the embodiments provided by this utility model, an insulating partition is provided between the pad 6 and the electrode seat 7.

[0043] The insulating partition blocks the current from the electrode holder 7 to the pad 6 and support frame, preventing current leakage from causing the equipment casing to become electrified (preventing electric shock). It also prevents stray currents from interfering with the main circuit (electrode holder 7 → electrode head 5 → reactant), ensuring precise and controllable Joule heating. The insulating partition can withstand the high temperatures (2000℃ to 3000℃) during the reaction, preventing insulation failure at high temperatures and solving the problem of easy melting of existing simple insulating components (such as plastic gaskets).

[0044] Insulation partition material options: mica board is preferred; alumina ceramic board (higher temperature resistance, suitable for extreme temperatures above 3000K) or polyimide board (lightweight, suitable for low-temperature flash evaporation reaction) are also options.

[0045] In the embodiment provided by this utility model, the lead screw 9 transmission mechanism includes a lead screw 9, a handwheel 10, a slider 12 and a connecting plate 11. The lead screw 9 is suspended below the support plate 2 through the connecting plate 11, and the lead screw 9 is rotatably connected to the connecting plate 11. The slider 12 is sleeved on the lead screw 9 and is rotatably connected to the lead screw 9. The slider 12 is located in the guide hole 4 and is connected to the pad 6 of the electrode assembly A. The handwheel 10 is connected to one end of the lead screw 9.

[0046] The connecting plate 11 suspends the lead screw 9, preventing transmission misalignment caused by the lead screw 9 sags due to its own weight. The slider 12 is threadedly engaged with the lead screw 9 and is embedded in the guide hole 4, enabling linear sliding of the electrode assembly A. The spacing adjustment accuracy can reach the millimeter level, ensuring precise alignment of the two electrode heads 5 with the insulating sleeve. The lead screw 9 transmission mechanism is located below the support plate 2, without occupying the reaction space above the support plate 2, avoiding interference with components such as the insulating sleeve and temperature sensor, and is compatible with various reaction chambers.

[0047] An angle encoder is installed at handwheel 10 to provide real-time feedback on the rotation angle of lead screw 9, thereby indirectly calculating the moving distance of electrode assembly A and realizing digital display of the spacing; or a motor drive module (such as a stepper motor driver) is installed to control the motor speed through PLC or microcontroller to achieve automated and precise adjustment of the spacing.

[0048] Add a wear-resistant bearing (such as a deep groove ball bearing) to the rotating connection between the lead screw 9 and the connecting plate 11 to reduce transmission friction and improve the accuracy of spacing adjustment; or attach a wear-resistant polytetrafluoroethylene coating to the inner wall of the guide hole 4 to reduce the sliding resistance of the slider 12. Install a motor (such as a stepper motor or servo motor) at the end of the lead screw 9 away from the handwheel 10 to replace manual rotation of the handwheel 10, realize the automatic adjustment of the spacing of the electrode assembly A, and adapt to the threaded connection of the conductive seat in batch experimental scenarios.

[0049] It should be noted that any parts not disclosed or specifically described in this utility model are existing technology or conventional settings, and their specific structures and working principles will not be repeated. In this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] Although embodiments of this utility model have been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A manually operated horizontal reaction fixture based on Joule heating, characterized in that, include: The support frame includes a base (1), a support plate (2) and multiple connecting columns (3). The support plate (2) is fixed above the base (1) by multiple connecting columns (3). The support plate (2) has a rectangular guide hole (4) along its length. Electrode assembly A and electrode assembly B both include a conductive base and a cylindrical electrode head (5). The electrode head (5) is detachably electrically connected to the conductive base. The conductive base of electrode assembly A is located on the support plate (2) above the guide hole (4), and the conductive base of electrode assembly B is fixed on the support plate (2) at one end of the guide hole (4). The two electrode heads (5) are used to clamp the insulating sleeve, and the electrode heads (5) have various specifications to match insulating sleeves of different diameters. The lead screw (9) transmission mechanism is fixed below the support plate (2). The lead screw (9) transmission mechanism passes through the guide hole (4) and is fixedly connected to the conductive seat of the electrode assembly A, which is used to drive the electrode assembly A to slide along the length direction of the guide hole (4).

2. The manually operated horizontal reaction fixture based on Joule heating as described in claim 1, characterized in that, The conductive base includes a pad (6), an electrode base (7), and an electrode plate (8). The electrode base (7) is fixed on the pad (6), and the electrode plate (8) is detachably connected to the electrode base (7). The electrode plate (8) is provided with a connection hole, and the electrode head (5) is connected to the connection hole. The electrode base (7), the electrode plate (8), and the electrode head (5) are electrically connected. The two electrode bases (7) are electrically connected to the positive and negative terminals of the power supply, respectively.

3. A manually operated horizontal reaction fixture based on Joule heating as described in claim 2, characterized in that, It also includes a conductive plate, which is used to place non-conductive or high-resistance substances to be reacted. The two ends of the conductive plate are detachably clamped between the electrode seat (7) and the electrode plate (8) of the electrode assembly A and the electrode assembly B, respectively.

4. The manually operated horizontal reaction fixture based on Joule heating as described in claim 3, characterized in that, The electrode holder (7) and the electrode plate (8) have anti-slip textures on their opposite surfaces.

5. A manually operated horizontal reaction fixture based on Joule heating as described in claim 3, characterized in that, The electrode head (5) is threadedly connected to the conductive seat.

6. A manually operated horizontal reaction fixture based on Joule heating as described in claim 2, characterized in that, An insulating partition is provided between the pad (6) and the electrode seat (7).

7. A manually operated horizontal reaction fixture based on Joule heating as described in claim 1, characterized in that, The lead screw (9) transmission mechanism includes a lead screw (9), a handwheel (10), a slider (12), and a connecting plate (11). The lead screw (9) is suspended below the support plate (2) through the connecting plate (11), and the lead screw (9) is rotatably connected to the connecting plate (11). The slider (12) is sleeved on the lead screw (9) and is rotatably connected to the lead screw (9). The slider (12) is located in the guide hole (4) and is connected to the pad (6) of the electrode assembly A. The handwheel (10) is connected to one end of the lead screw (9).

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