Four-channel graphite joule heating device
Through the design of the four-channel graphite Joule heating device, the problem of insufficient processing volume of the existing device is solved, and the consistency of simultaneous heating and temperature rise of multiple samples is achieved, meeting the demand for rapid heating of powders.
Patent Information
- Application Number
- CN202422303079.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing Joule heating device can only process one sample and cannot process multiple samples at the same time in the same environment, resulting in insufficient processing volume and inability to conduct comparative experiments between different samples.
A four-channel graphite Joule heating device is designed, using a four-channel heating mechanism, including upper and lower graphite electrode columns and four graphite crucibles. Four samples can be heated simultaneously through a set of DC power supplies, ensuring resistance consistency and temperature rise synchronization.
Four samples were achieved in a single heat treatment, which increased the processing volume, met the preparation requirements of rapid heating of powder, and achieved comparative experiments between different samples.
Smart Images
Figure CN223274241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of material heat treatment, and more specifically, to a four-channel graphite Joule heating device. Background Art
[0002] Joule heating devices can provide a specific electrical environment, either vacuum or atmospheric, for both conductive and non-conductive materials. By utilizing the Joule heating phenomenon in a graphite crucible when energized, the material reaches extremely high temperatures (1000-3000°C) in a very short period of time (0-10 seconds). This allows for investigation of changes in the material's physical properties under extreme conditions and severe thermal shock. However, existing Joule heating devices can only heat treat one sample at a time, resulting in insufficient throughput. They cannot process multiple samples simultaneously under the same conditions, hindering the ability to compare different samples under the same heat treatment environment. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a four-channel graphite Joule heating device, including a stainless steel water-cooled vacuum cavity, a water-cooled positive electrode is provided below the stainless steel water-cooled vacuum cavity, a water-cooled negative electrode is provided above the stainless steel water-cooled vacuum cavity, a heating zone is opened inside the stainless steel water-cooled vacuum cavity, a water-cooled cavity cover is provided on the top of the heating zone, and a four-channel heating mechanism is provided inside the heating zone. The four-channel heating mechanism includes an upper graphite electrode column and a lower graphite electrode column, and four identical graphite crucibles are provided between the upper and lower graphite electrode columns, and the four graphite crucibles are connected in parallel in a one-way manner.
[0004] In a preferred embodiment, an electrode upper sleeve is installed in the middle of the box cover, the electrode upper sleeve is connected to the interior of the heating zone, and a movable end graphite electrode with a bottom end connected to the heating upper seat is inserted into the electrode upper sleeve.
[0005] In a preferred embodiment, an electrode lower sleeve is installed in the middle of the bottom end of the stainless steel water-cooled vacuum chamber. The electrode lower sleeve is connected to the interior of the heating zone, and a fixed-end graphite electrode with a top end connected to the heating lower seat is inserted into the electrode lower sleeve.
[0006] In a preferred embodiment, the top end of the movable end graphite electrode is connected to the water-cooled negative electrode, and the bottom end of the fixed end graphite electrode is connected to the water-cooled positive electrode.
[0007] In a preferred embodiment, the upper graphite electrode column and the lower graphite electrode column are both arranged in a "cross" shape, a cylindrical hole for positioning the graphite crucible is opened on the surface of the lower graphite electrode column, and the bottom of the upper graphite electrode column is completely fitted on the top surface of the graphite crucible.
[0008] The technical effects and advantages of this utility model are:
[0009] The utility model adopts a one-through-four parallel design for the graphite electrode structure, so that one set of DC power supply can heat four graphite samples at the same time. The current and resistance theoretical design of the four groups of graphite crucibles are consistent. A single power supply can heat-treat four samples at a time, thereby increasing the preparation capacity of a single sintering and realizing rapid reaction screening. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0011] Figure 2 This is a schematic diagram of the internal structure of the utility model;
[0012] Figure 3 This is a schematic diagram of the structure of the lower graphite electrode column and graphite crucible of the utility model.
[0013] Explanation of the accompanying symbols: 1 stainless steel water-cooled vacuum chamber, 2 water-cooled positive electrode, 3 water-cooled negative electrode, 4 heating zone, 5 water-cooled chamber cover, 6 lower graphite electrode column, 7 upper graphite electrode column, 8 graphite crucible, 9 upper electrode sleeve, 10 movable end graphite electrode, 11 lower electrode sleeve, 12 fixed end graphite electrode, 13 slot. DETAILED DESCRIPTION
[0014] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.
[0015] like Figure 1-3 A four-channel Joule heating device is shown, comprising a stainless steel water-cooled vacuum chamber 1, a water-cooled positive electrode 2 disposed below the stainless steel water-cooled vacuum chamber 1, a water-cooled negative electrode 3 disposed above the stainless steel water-cooled vacuum chamber 1, a heating zone 4 defined within the stainless steel water-cooled vacuum chamber 1, a water-cooled chamber cover 5 disposed on top of the heating zone 4, and a four-channel heating mechanism disposed within the heating zone 4. The four-channel heating mechanism comprises a lower heating seat 6 and an upper heating seat 7, with four graphite crucibles 8 disposed between the upper heating seat 7 and the lower heating seat 6.
[0016] The lower heating seat 6 and the upper heating seat 7 are both arranged in a cross shape. A slot 13 for clamping the graphite crucible 8 is opened on the surface of the lower heating seat 6, and the bottom end of the upper heating seat 7 is attached to the top end of the graphite crucible 8.
[0017] Furthermore, a one-through-four parallel design is adopted between the four graphite crucibles 8, so that a set of DC power supply can heat four graphite samples at the same time. The current passing through the four groups of graphite crucibles 8 has the same resistance, and the temperature rise of the four crucibles is synchronized and the temperature difference between them does not exceed 20°C; it meets the industry's preparation requirements for rapid heating of powders, and improves the single powder heat treatment capacity compared to the existing Joule heating sintering equipment on the market.
[0018] An electrode upper sleeve 9 is installed in the middle of the box cover. The electrode upper sleeve 9 is connected to the interior of the heating zone 4. A movable end graphite electrode 10 with its bottom end connected to the heating upper seat 7 is inserted into the electrode upper sleeve 9.
[0019] An electrode lower sleeve 11 is installed in the middle of the bottom end of the stainless steel water-cooled vacuum chamber 1. The electrode lower sleeve 11 is connected to the interior of the heating zone 4. A fixed-end graphite electrode 12 with a top end connected to the heating lower seat 6 is inserted into the electrode lower sleeve 11.
[0020] The top end of the movable end graphite electrode 10 is connected to the water-cooled negative electrode 3, and the bottom end of the fixed end graphite electrode 12 is connected to the water-cooled positive electrode 2;
[0021] When in use, the water-cooled positive electrode 2 and the stainless steel water-cooled vacuum chamber 1 of the equipment are partially fixed on the workbench, while the water-cooled chamber cover 5 and the water-cooled negative electrode 3 above the heating zone 4 can be raised and lowered to open. After the water-cooled chamber cover 5 and the water-cooled negative electrode 3 are raised and opened, the graphite crucible 8 inside the heating zone 4 is exposed, and the powder raw materials to be heated and sintered are placed inside the graphite crucible 8. Then the water-cooled chamber cover 5 partially falls back, and the heating upper seat 7 covers the top of the graphite crucible 8, and the powder raw materials are heated by the electrode work.
[0022] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.
Claims
1. A four-channel graphite Joule heating device, characterized in that: It includes a stainless steel water-cooled vacuum cavity, a water-cooled positive electrode is provided below the stainless steel water-cooled vacuum cavity, a water-cooled negative electrode is provided above the stainless steel water-cooled vacuum cavity, a heating zone is opened inside the stainless steel water-cooled vacuum cavity, a water-cooled cavity cover is provided on the top of the heating zone, and a four-channel heating mechanism is provided inside the heating zone. The four-channel heating mechanism includes an upper graphite electrode column and a lower graphite electrode column, and four identical graphite crucibles are provided between the upper and lower graphite electrode columns, and the four graphite crucibles are connected in parallel.
2. A four-channel graphite Joule heating device according to claim 1, characterized in that: An electrode upper sleeve is installed in the middle of the water-cooling chamber cover. The electrode upper sleeve is communicated with the interior of the heating zone. A movable end graphite upper electrode is installed in the electrode upper sleeve.
3. The four-channel graphite Joule heating device according to claim 2, characterized in that: An electrode lower sleeve is installed in the middle of the bottom of the stainless steel water-cooled vacuum cavity. The electrode lower sleeve is communicated with the interior of the heating zone. A fixed-end graphite electrode is installed in the electrode lower sleeve.
4. The four-channel graphite Joule heating device according to claim 3, characterized in that: The top end of the movable end graphite upper electrode is connected to the water-cooled negative electrode, and the bottom end of the fixed end graphite electrode is connected to the water-cooled positive electrode.
5. The four-channel graphite Joule heating device according to claim 1, characterized in that: The upper graphite electrode column and the lower graphite electrode column are both arranged in a "cross" shape, and a cylindrical hole for positioning the graphite crucible is opened on the surface of the lower graphite electrode column. The bottom of the upper graphite electrode column is completely fitted on the top surface of the graphite crucible.