A rotatable joule heating device

Abstract

The utility model relates to the technical field of joule heat high temperature synthesis equipment discloses a rotatable joule heating device, include: the two sides inner wall of heating bin are connected with the clamping piece opposite rotation, and the pivot of one clamping piece is worn out heating bin, reaction pipe is arranged in the heating bin, and the both ends of reaction pipe are respectively clamped on two clamping pieces, and carbonaceous heating carrier is equipped in reaction pipe, and carbonaceous heating carrier is used for under the action of electric current instantaneous heat generation to heat the material in reaction pipe, the output shaft of rotary drive part is equipped with magnetic coupler, and magnetic coupler is connected with the pivot of clamping piece worn out heating bin, is used for driving reaction pipe to rotate through clamping piece, this device can overcome the defect that traditional heater heating rate is low, heating time is long and limit temperature is not high, can help high temperature synthesis material even in the heating test process is heated, and better control synthesis material's collective appearance, prevent the problem that synthesis material appearance is uneven.

Description

Technical Field

[0001] This utility model relates to the technical field of Joule heating high-temperature synthesis equipment, and in particular to a rotatable Joule heating device. Background Technology

[0002] Traditional laboratory heating devices generally use tubular furnaces, which mainly use electric heating. They generate heat by passing electricity through the furnace and then use thermal radiation to heat the materials. The safe heating temperature of a typical tubular furnace is below 1500℃.

[0003] Traditional tubular furnaces use resistance wires to heat samples via thermal radiation. However, this heating method has drawbacks when used for high-temperature synthetic material heating experiments, such as low heating rate, long heating time, and low extreme temperature. It is also difficult to ensure uniform heating of the high-temperature synthetic materials and to control the overall morphology of the materials. Utility Model Content

[0004] This invention proposes a rotatable Joule heating device to address the shortcomings of the prior art. This rotatable Joule heating device can overcome the defects of traditional heaters, such as low heating rate, long heating time, and low limit temperature. It can help high-temperature synthetic materials to be heated evenly during heating tests and better control the overall morphology of the synthetic materials, preventing the problem of uneven morphology of the synthetic materials.

[0005] The technical solution of this utility model is: a rotatable Joule heating device, comprising:

[0006] The heating chamber has two inner walls on both sides that are rotatably connected by snap-fit ​​components, and the pivot of one of the snap-fit ​​components extends out of the heating chamber.

[0007] A reaction tube is installed inside a heating chamber. Both ends of the reaction tube are respectively clamped onto two clamping components. A carbonaceous heating carrier is provided inside the reaction tube. The carbonaceous heating carrier is used to generate heat instantaneously under the action of a large current to heat the material inside the reaction tube.

[0008] The output shaft of the rotary drive is connected to the rotating shaft of the heating chamber through the snap-fit ​​component. The rotary drive is used to drive the reaction tube to rotate through the snap-fit ​​component so that the material in the reaction tube is heated evenly.

[0009] In at least one embodiment of the present invention, a magnetic coupler is provided on the output shaft of the rotary drive component, and the magnetic coupler is connected to the rotating shaft of the snap-fit ​​component that extends out of the heating chamber.

[0010] In at least one embodiment of the present invention, the heating chamber is a sealed chamber body, and the heating chamber is connected to a vacuum pump.

[0011] In at least one embodiment of this utility model, the rotary drive component is a motor, and the rotary drive component is connected to a frequency converter.

[0012] In at least one embodiment of the present invention, the carbonaceous heating carrier includes: a graphite rod, carbon paper, graphite paper, or carbon felt.

[0013] In at least one embodiment of this utility model, the heating chamber is made of insulating material, and the melting point of the heating chamber is greater than 3000K.

[0014] In at least one embodiment of this utility model, the reaction tube is made of insulating material, and the reaction tube is a quartz tube or a ceramic tube.

[0015] In at least one embodiment of the present invention, the top of the heating chamber is provided with a chamber cover, which is sealed to the heating chamber.

[0016] In at least one embodiment of this utility model, an inert gas source is connected to the heating chamber.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model comprises a heating chamber with two internally rotatably connected snap-fit ​​components, a reaction tube mounted on the two snap-fit ​​components and containing a carbonaceous heating carrier, and a rotary drive component for rotating the reaction tube. In use, an appropriate amount of sample is loaded into the reaction tube, followed by the addition of the carbonaceous heating carrier. After loading, the reaction tube is snapped into the two snap-fit ​​components of the heating chamber. The rotary drive component is then switched on, energizing the carbonaceous heating carrier. The carbonaceous heating carrier instantly heats up under the influence of a large current, thus heating the material inside the reaction tube. Simultaneously, due to the rotary drive... The component drives the reaction tube to rotate, ensuring that the sample inside the reaction tube is heated uniformly. Compared with existing technologies, the use of a carbonaceous heating carrier in this heating device increases the upper limit of the heating temperature. The heating method combines direct heat conduction with indirect heat radiation, which greatly improves the heating rate and heating efficiency, resulting in a heating effect superior to traditional laboratory tube heaters. Furthermore, the continuous tumbling and rotation of the material during sample heating helps ensure uniform heating of the high-temperature synthesized material during the heating test and better controls the overall morphology of the synthesized material, preventing the problem of uneven morphology in the synthesized material.

[0019] 2. This utility model, by setting a magnetic coupler between the output shaft of the rotary drive component and the rotating shaft of the snap-fit ​​component, makes the heating and rotary drive modules of the entire device independent of each other, making the whole set of equipment safer; compared with the structure of traditional laboratory tubular heaters, it achieves additional functionality without increasing structural complexity; at the same time, during the heating process, the rotation speed of the reaction tube can be controlled according to the heating conditions required by the heating sample by changing the field strength of the magnetic coupler and the gap between the output shaft of the rotary drive component and the rotating shaft of the snap-fit ​​component, thus achieving more uniform heating.

[0020] 3. By setting up a sealable heating chamber, the present invention allows the working conditions to support vacuum, inert, and nitrogen conditions. At the same time, it can isolate the thermal effects of high-temperature heating from affecting the control module and increasing the risk factor of the experiment. Conversely, it can reduce heat loss and energy consumption. Attached Figure Description

[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 heating chamber structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Heating chamber; 11. Snap-fit ​​component; 12. Chamber cover; 2. Reaction tube; 21. Carbon heating carrier; 3. Rotary drive component; 31. Magnetic coupler; 4. Vacuum pump. Detailed Implementation

[0025] The accompanying drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] The concept of this Joule heating device originates from existing Joule flash evaporation technology. Joule flash evaporation is a heating technology that utilizes the principle that the heat generated by the resistance of a conductor when an electric current passes through it, causing the conductor's temperature to rise, thus achieving heating. It boasts numerous advantages over traditional tubular heaters and muffle furnaces, including high heating efficiency (heat generated from the original potential rather than thermal radiation), high peak temperature, rapid heating and cooling rates, and low heat loss. Current Joule flash evaporation technologies typically use supercapacitors as power sources and employ pulse width modulation (PWM) technology (frequency conversion) to adjust parameters such as voltage to achieve instantaneous high-temperature material synthesis (temperatures typically exceeding 3000K).

[0029] Utilizing the principles and advantages of Joule heating, a rotatable Joule heating device was designed to replace traditional tubular heaters, muffle furnaces, and other heating devices, overcoming their shortcomings such as low heating efficiency (heat transfer via thermal radiation) and slow heating / cooling rates. The rotatable function helps ensure uniform heating of the material during high-temperature synthesis, better controlling the overall morphology of the synthesized material and preventing the uneven morphology problem present in current Joule flash evaporation technologies.

[0030] Combination Figures 1 to 2 As shown, a rotatable Joule heating device includes:

[0031] The inner walls on both sides of the heating chamber 1 are rotatably connected by snap-fit ​​pieces 11, and the pivot of one of the snap-fit ​​pieces 11 extends out of the heating chamber 1; specifically, the heating chamber 1 is used for heat insulation and to reduce heat loss.

[0032] The reaction tube 2 is installed inside the heating chamber 1. Both ends of the reaction tube 2 are respectively clamped on two clamping parts 11. The reaction tube 2 is equipped with a carbon heating carrier 21. The carbon heating carrier 21 is used to generate heat instantly under the action of a large current to heat the material inside the reaction tube 2.

[0033] A magnetic coupler 31 is mounted on the output shaft of the rotary drive component 3. The magnetic coupler 31 is connected to the rotating shaft of the heating chamber 1 via the snap-fit ​​component 11, and is used to drive the reaction tube 2 to rotate, ensuring uniform heating of the material within the reaction tube 2. Specifically, the magnetic coupler 3 can adjust its field strength or gap to regulate the rotational speed of the drive shaft. The magnetic coupler 3 is connected to the rotary drive component 3 and provides physical isolation between the drive end and the driven section, avoiding direct contact and shaft transmission as in traditional mechanical coupling, thus preventing friction, wear, and vibration problems caused by torque transmission. Simultaneously, the magnetic coupler allows for torque adjustment and speed control by changing the magnetic field strength, meeting different operating conditions and load requirements. Since the drive end and the driven end are not in actual contact, sealing and explosion-proof effects are achieved, allowing the entire device to be divided into a control module and a heating module, with each module operating independently.

[0034] As an alternative embodiment, the heating chamber 1 is a sealed chamber used to provide conditions for vacuuming, and the heating chamber 1 is connected to a vacuum pump 4.

[0035] As an alternative embodiment, the rotary drive 3 is a motor, which can be powered by a DC power supply or an AC power supply. The rotary drive 3 is connected to a frequency converter, and the motor speed is controlled by PWM technology or frequency converter components.

[0036] As an alternative embodiment, the carbonaceous heating carrier 21 includes a graphite rod, carbon paper, or carbon felt. A large current is supplied to the heating carrier (graphite rod, carbon paper, carbon felt, etc.) inside the reaction tube 2 via a DC power supply (constant current) or a capacitor bank (pulse current), causing the internal carbonaceous conductors to heat up instantaneously according to Joule's law. By adjusting parameters such as voltage and frequency, the input energy is regulated, ultimately controlling the temperature inside the heating chamber 1, thereby heating the materials inside the reaction tube 2 to synthesize the desired materials.

[0037] As an alternative embodiment, heating chamber 1 is made of insulating material with a melting point greater than 3000K; if no suitable material is available or the cost is too high, a duplex structure for the heating chamber can be considered.

[0038] As an alternative embodiment, the reaction tube 2 is made of an insulating material, such as a quartz tube, a ceramic tube, or a composite material.

[0039] As an alternative embodiment, the top of the heating chamber 1 is provided with a chamber cover 12, which is sealed to the heating chamber 1. The chamber cover 12 is used to open when adding samples. Specifically, the chamber cover 12 is provided with a sealing rubber strip that cooperates with the heating chamber 1 in the circumferential direction.

[0040] As an alternative embodiment, the heating chamber 1 is connected to an inert gas source, specifically, the inert gas source can be a storage bottle, etc.

[0041] The usage method of this embodiment specifically includes the following steps:

[0042] Take an appropriate amount of sample and fill it into the reaction tube 2. Select different sample loading methods according to different carbonaceous heating carriers 21. For example, for graphite rod electrodes: after adding an appropriate amount of sample into the reaction tube 2, insert a graphite rod, and then plug both sides of the reaction tube with a graphite plug. If the heating carrier is carbon paper, graphite paper, carbon felt, etc., the sample is loaded onto its surface. After loading the sample, snap the reaction tube 2 into the two snap-fit ​​parts 11 of the heating chamber 1.

[0043] Turn on the switch of the rotary drive 3, set the frequency parameters through the frequency converter, and adjust the rotation speed of the rotary drive 3 (or use the method of controlling the field strength of the magnetic coupler and adjusting the gap between the drive shaft and the driven shaft).

[0044] Connect the power supply to the carbon heating carrier 21 and adjust the various heating parameters (voltage, heating time, resistance test, maximum temperature, etc.).

[0045] Start the rotary drive 3, turn on the heating switch, and begin heating the sample.

[0046] After heating is complete, turn off the rotary drive 3 and the heating switch. Once the temperature inside the heating chamber 1 has dropped to room temperature, open the heating chamber 1 and remove the reaction tube 2.

[0047] Furthermore, before starting the rotating drive unit 3, the heating chamber 1 can be evacuated, purged with inert gas, or purged with nitrogen to meet different special heating requirements.

[0048] This invention provides a rotatable Joule heating method using a magnetic coupler for transmission. The magnetic coupler enables contactless transmission and rotation, protecting the motor from damage even in the event of a safety malfunction. The heating module utilizes heating media such as graphite rods, carbon paper, or carbon felt, increasing the upper limit of the heating temperature. The heating method combines direct heat conduction with indirect heat radiation, significantly improving the heating rate and efficiency, resulting in superior heating performance compared to traditional laboratory tubular heaters.

[0049] 1. It enables rotary Joule heating of the reaction tube. Due to the rotation and rolling of the sample in the reaction tube, the heating is more uniform. The motor frequency is adjustable (or the field strength of the magnetic coupler and the gap between the drive shaft and the driven shaft can be changed), so the rotation speed of the reaction tube can be freely controlled according to the heating conditions required by the sample, thus achieving more uniform heating.

[0050] 2. The module controlling the rotation of the reaction tube and the module controlling the heating inside the reaction tube are connected by a magnetic coupler, making them two completely independent modules and enhancing the safety of the entire system. Compared to the structure of traditional laboratory tube heaters, this system adds functionality without increasing structural complexity, and the rotational heating ensures more uniform heating of the materials.

[0051] 3. The heating method adopts the method of adding electrodes inside the reaction tube.

[0052] 4. The presence of the heating chamber allows for operation under vacuum, inert, and nitrogen conditions. At the same time, it can isolate the thermal effects of high-temperature heating from affecting the control module and increasing the risk of the experiment. Conversely, it can reduce heat loss and energy consumption.

[0053] 5. The circuit design of the heating module can only meet the basic operating conditions. Users can customize the heating module according to their own requirements for the parameters of the working conditions, including designing software such as LabVIEW to achieve computer control, etc. Therefore, it is an expandable circuit.

[0054] The above embodiments are merely specific implementations of this utility model patent, used to illustrate the technical solution of this utility model patent, and not to limit it. The protection scope of this utility model patent is not limited thereto. Although this utility model patent has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions implemented by this utility model patent, and should all be covered within the protection scope of this utility model.

Claims

1. A rotatable joule heating device, characterized in that, include: The heating chamber (1) has two inner walls on both sides that are rotatably connected to snap fasteners (11), and the shaft of one of the snap fasteners (11) passes through the heating chamber (1). The reaction tube (2) is set inside the heating chamber (1). The two ends of the reaction tube (2) are respectively clamped on the two clamping parts (11). The reaction tube (2) is provided with a carbon heating carrier (21). The carbon heating carrier (21) is used to generate heat instantaneously under the action of electric current to heat the material inside the reaction tube (2). The rotary drive (3) has its output shaft connected to the rotating shaft of the heating chamber (1) through the snap fastener (11), and is used to drive the reaction tube (2) to rotate through the snap fastener (11) so that the material in the reaction tube (2) is heated evenly.

2. The rotatable Joule heating device as described in claim 1, characterized in that, The output shaft of the rotary drive (3) is provided with a magnetic coupler (31), which is connected to the rotating shaft of the heating chamber (1) through the snap-fit ​​(11).

3. The rotatable Joule heating device as described in claim 1, characterized in that, The heating chamber (1) is a sealed chamber, and the heating chamber (1) is connected to a vacuum pump (4).

4. The rotatable Joule heating device as described in claim 1, characterized in that, The rotary drive component (3) is a motor, and the rotary drive component (3) is connected to a frequency converter.

5. A rotatable Joule heating device as described in claim 1, characterized in that, The carbonaceous heating carrier (21) includes: graphite rod, carbon paper, graphite paper or carbon felt.

6. A rotatable Joule heating device as described in claim 1, characterized in that, The heating chamber (1) is made of insulating material and has a melting point greater than 3000K.

7. A rotatable Joule heating device as described in claim 1, characterized in that, The reaction tube (2) is made of insulating material, and the reaction tube (2) is a quartz tube or a ceramic tube.

8. A rotatable Joule heating device as described in claim 1, characterized in that, The top of the heating chamber (1) is provided with a chamber cover (12), which is sealed to the heating chamber (1).

9. A rotatable Joule heating device as described in claim 1, characterized in that, The heating chamber (1) is connected to an inert gas source.

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