Graphite electromagnetic induction heating device based on high-permeability ferrite material

Abstract

The invention discloses a graphite electromagnetic induction heating device based on a high-permeability ferrite material, and relates to the technical field of electromagnetic induction heating. The device comprises a base, a first heating sleeve and a second heating sleeve are placed on the base, the first heating sleeve and the second heating sleeve are detachably installed, and the first heating sleeve and the second heating sleeve are both semicircular; a first end cover is mounted at the top of the first heating sleeve, and a first square groove is formed in the side wall of the upper portion of the first heating sleeve; the top of the second heating sleeve is provided with a second end cover, and a second square groove is formed in the side wall of the lower portion of the second heating sleeve. According to the invention, the first heating sleeve and the second heating sleeve form a sleeve type ferrite structure, so that the highest temperature and the heating efficiency of electromagnetic induction heating of graphite can be effectively improved and the power required by electromagnetic induction heating of graphite can be effectively reduced under the same power; therefore, compared with other structural forms, the electromagnetic induction heating performance of the graphite heater can be better improved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic induction heating, in particular to a graphite electromagnetic induction heating device based on high magnetic permeability ferrite material. Background Art

[0002] Graphite heating technology plays a key role in high-temperature mechanical property tests of composite materials. Graphite materials are often used to manufacture radiation high-temperature furnaces or heating elements due to their excellent high-temperature stability, good thermal conductivity, electrical conductivity and emissivity. For high-temperature mechanical property tests of non-conductive composite materials, electromagnetic induction cannot act directly on the test piece. Using graphite materials as radiation heaters can not only solve the problem that electromagnetic induction heating cannot act directly on the test piece, but the uniform electric field generated by the energized coil can also enable the graphite heater to provide a uniform and controllable heating environment, which is crucial for evaluating the performance of materials under extreme conditions.

[0003] Aerospace vehicles experience extreme temperature changes during flight, especially when flying at high speed or re-entering the atmosphere. In high-temperature environments, the mechanical properties of materials may change significantly. High-temperature mechanical testing can be used to evaluate the mechanical properties of materials at high temperatures and ensure the performance of materials under extreme conditions. High-temperature mechanical testing is the key to ensuring the safe operation of aerospace vehicles in high-temperature environments. Through high-temperature mechanical testing, potential material failure modes can be identified, so that measures can be taken to prevent accidents. Electromagnetic induction heating equipment is often required during high-temperature mechanical testing, but existing electromagnetic induction heating equipment has heat loss problems caused by magnetic field scattering, resulting in unnecessary energy consumption. To this end, the present invention proposes a graphite electromagnetic induction heating device based on high magnetic permeability ferrite material. Summary of the invention

[0004] The purpose of the present invention is to provide a graphite electromagnetic induction heating device based on high magnetic permeability ferrite material, which can reduce unnecessary energy consumption and thus improve the overall energy efficiency of the system, and can also shield the magnetic field outward to avoid electromagnetic interference to precision instruments.

[0005] To achieve the above object, the present invention provides the following technical solutions: a graphite electromagnetic induction heating device based on high magnetic permeability ferrite material, applied to a biaxial mechanical properties test piece, comprising a base, on which a heating sleeve 1 and a heating sleeve 2 are placed, the heating sleeve 1 and the heating sleeve 2 are detachably installed, and the heating sleeve 1 and the heating sleeve 2 are both arranged in a semicircular shape;

[0006] An end cover is installed on the top of the heating sleeve, and a square groove is opened on the upper side wall of the heating sleeve;

[0007] The top of the second heating sleeve is provided with a second end cover, and the lower side wall of the second heating sleeve is provided with a second square groove;

[0008] A heat insulation layer is installed inside the heating sleeve 1 and the heating sleeve 2, and a graphite heater is installed inside the heat insulation layer;

[0009] An induction coil is fitted on the inner wall of the heating sleeve 1 and the heating sleeve 2, a water cooling channel is opened inside the induction coil, the induction coil is spirally wound on the insulation layer, and the induction coil passes through the square slot 1 and the square slot 2.

[0010] Furthermore, the number of the bases is four, and the four bases are distributed in a rectangular shape.

[0011] Furthermore, the heating sleeve 1 and the heating sleeve 2 are both made of ferrite material.

[0012] Furthermore, protrusions are fixedly connected to both sides of the second heating sleeve, and grooves matching the protrusions are formed on both sides of the first heating sleeve.

[0013] Furthermore, the heat insulation layer is made of ceramic fiber heat insulation material, and the heat insulation layer is configured to be a hollow cylinder with upper and lower openings.

[0014] Furthermore, the end cover 1 and the end cover 2 are both configured as semicircular rings, and a circular hole is formed in the center after the end cover 1 and the end cover 2 are assembled, and the outer diameter of the heat insulation layer is equal to the diameter of the circular hole.

[0015] Furthermore, the inner diameter of the thermal insulation layer is equal to the outer diameter of the graphite heater.

[0016] Furthermore, a through hole is opened in the center of the graphite heater.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) The present invention uses heating sleeve 1 and heating sleeve 2 to form a sleeve-type ferrite structure, which can effectively improve the maximum temperature and heating efficiency of electromagnetic induction heating of graphite under the same power and effectively reduce the power required for electromagnetic induction heating of graphite, thereby better improving the electromagnetic induction heating performance of the graphite heater compared to other structural forms.

[0019] (2) When in use, the present invention utilizes the water cooling channel provided in the induction coil to cool down the induction coil while cooling down the heating sleeve 1 and the heating sleeve 2.

[0020] (3) The present invention also facilitates quick installation or disassembly by designing the heating sleeve 1 and the heating sleeve 2 to be split, thereby enhancing the installation or disassembly efficiency. At the same time, it is also convenient to store when not in use, avoiding occupying too much space.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of a structure of a heating sleeve of the present invention;

[0024] Figure 3 It is a three-dimensional schematic diagram of the second structure of the heating sleeve of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the induction coil structure of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the heat insulation layer structure of the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of the graphite heater structure of the present invention;

[0028] Figure 7 This is a comparison chart of the temperature enhancement performance effects of the sleeve-type ferrite structure and the ferrite-free structure described in the present invention.

[0029] Reference numerals:

[0030] 1. Base; 2. Heating sleeve 1; 3. Heating sleeve 2; 4. End cover 1; 5. Square groove 1; 6. End cover 2; 7. Square groove 2; 8. Thermal insulation layer; 9. Graphite heater; 10. Induction coil; 11. Water cooling channel; 12. Bump; 13. Groove; 14. Through hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] See also Figure 1-Figure 6 The present invention provides a technical solution: a graphite electromagnetic induction heating device based on high magnetic permeability ferrite material, comprising a base 1, on which a heating sleeve 2 and a heating sleeve 3 are placed, the heating sleeve 2 and the heating sleeve 3 are detachably installed, and the heating sleeve 2 and the heating sleeve 3 are both arranged in a semicircular shape;

[0033] An end cover 4 is installed on the top of the heating sleeve 2, and a square groove 5 is opened on the upper side wall of the heating sleeve 2;

[0034] The top of the heating sleeve 2 is provided with an end cover 2 6, and the lower side wall of the heating sleeve 2 3 is provided with a square groove 2 7;

[0035] A heat insulation layer 8 is installed inside the heating sleeve 1 2 and the heating sleeve 2 3, and a graphite heater 9 is installed inside the heat insulation layer 8;

[0036] An induction coil 10 is fitted on the inner walls of the heating sleeve 1 2 and the heating sleeve 2 3 , a water cooling channel 11 is opened inside the induction coil 10 , the induction coil 10 is spirally wound on the insulation layer 8 , and the induction coil 10 passes through the square slot 1 5 and the square slot 2 7 .

[0037] According to the technical solution of this embodiment, there are four bases 1 , which are distributed in a rectangular shape. The bases 1 are used to provide support for the heating sleeve 1 2 and the heating sleeve 2 3 .

[0038] With regard to the technical solution of this embodiment, since the heating sleeve 1 2 and the heating sleeve 2 3 are both configured in a semicircular shape, the heating sleeve 1 2 and the heating sleeve 2 3 are spliced ​​to form a circular sleeve, and the heating sleeve 1 2 and the heating sleeve 2 3 are both made of ferrite material. The circular sleeve structure made of ferrite material can effectively concentrate the magnetic field generated by the energized coil inside it, thereby improving the electromagnetic induction heating performance.

[0039] Furthermore, protrusions 12 are fixedly connected to both sides of the heating sleeve 2 3, and grooves 13 matching the protrusions 12 are provided on both sides of the heating sleeve 1 2. The protrusions 12 and the grooves 13 are used to enhance the connection strength between the heating sleeve 1 2 and the heating sleeve 2 3. By designing the heating sleeve 1 2 and the heating sleeve 2 3 as split types, quick installation or disassembly is facilitated, thereby enhancing installation efficiency. At the same time, it is also convenient to store when not in use to avoid occupying too much space.

[0040] According to the technical solution of this embodiment, the thermal insulation layer 8 is made of ceramic fiber thermal insulation material. The thermal insulation layer 8 is configured as a hollow cylinder with upper and lower openings. The ceramic fiber thermal insulation material is not conductive and can effectively play a role in heat insulation and insulation.

[0041] Furthermore, the end cover 1 4 and the end cover 2 6 are both configured as semicircular rings, and a circular hole is formed in the center after the end cover 1 4 and the end cover 2 6 are assembled. The outer diameter of the insulation layer 8 is equal to the diameter of the circular hole, and the inner diameter of the insulation layer 8 is equal to the outer diameter of the graphite heater 9.

[0042] The technical solution of this embodiment is mainly used for biaxial mechanical property test specimens. The heating area is the mechanical property test area in the center of the specimen. A through hole 14 is opened in the center of the graphite heater 9, which is used as an optical measurement path for non-contact measurement technology. Through this through hole 14, the situation of the specimen during the experiment can be directly seen.

[0043] It should be further explained that both ends of the water cooling channel 11 inside the induction coil 10 are connected to the external cold water conduit, and the cold water is circulated inside the induction coil 10 by means of an external pump body, thereby achieving a cooling function.

[0044] Combination Figure 7 As shown, the technical solution of this embodiment can achieve an effect of increasing the maximum temperature of the graphite heater 9 by about 11.3% under the same power compared with a coil without a ferrite sleeve structure outside the coil; it can achieve an effect of increasing the heating rate of the graphite heater 9 by about 11% under the same power compared with a coil without a ferrite sleeve structure outside the coil; it can achieve an effect of reducing the power required to achieve the same heating effect by about 15.9% under the same power compared with a coil without a ferrite sleeve structure outside the coil.

[0045] The use principle and process of the present invention: in actual use, first connect the induction coil 10 to the medium frequency induction power supply. After power is turned on, the induction coil 10 will generate a uniform magnetic field and a uniform electric field around the conductor. At this time, the heating sleeve 1 2 and the heating sleeve 2 3 can effectively concentrate the magnetic field inward due to their high magnetic permeability material and special shape, thereby improving the heating capacity and achieving the purpose of improving energy utilization. The graphite heater 9 is heated by the energized coil, and the heated graphite heats the test piece in the form of thermal radiation, thereby achieving the heating effect. The water cooling channel 11 inside the induction coil 10 is externally connected to cold water, and the induction coil 10 can be cooled by the cold water. Moreover, since the induction coil 10 is attached to the inner walls of the heating sleeve 1 2 and the heating sleeve 2 3, the heating sleeve 1 2 and the heating sleeve 2 3 can be cooled while the induction coil 10 is cooled.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can also be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A graphite electromagnetic induction heating device based on high magnetic permeability ferrite material, applied to a biaxial mechanical properties test piece, comprising a base (1), characterized in that: A heating sleeve 1 (2) and a heating sleeve 2 (3) are placed on the base (1), the heating sleeve 1 (2) and the heating sleeve 2 (3) are detachably mounted, and the heating sleeve 1 (2) and the heating sleeve 2 (3) are both arranged in a semicircular shape; An end cover (4) is installed on the top of the heating sleeve (2), and a square groove (5) is opened on the upper side wall of the heating sleeve (2); The top of the second heating sleeve is provided with a second end cover (6), and the lower side wall of the second heating sleeve (3) is provided with a second square groove (7); A heat insulation layer (8) is installed inside the heating sleeve 1 (2) and the heating sleeve 2 (3), and a graphite heater (9) is installed inside the heat insulation layer (8); An induction coil (10) is fitted on the inner wall of the heating sleeve 1 (2) and the heating sleeve 2 (3), a water cooling channel (11) is provided inside the induction coil (10), the induction coil (10) is spirally wound on the thermal insulation layer (8), and the induction coil (10) passes through the square groove 1 (5) and the square groove 2 (7).

2. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 1, characterized in that: The number of the bases (1) is four, and the four bases (1) are distributed in a rectangular shape.

3. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 2, characterized in that: The heating sleeve 1 (2) and the heating sleeve 2 (3) are both made of ferrite material.

4. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 3 is characterized in that: The two sides of the second heating sleeve (3) are fixedly connected with protrusions (12), and the two sides of the first heating sleeve (2) are provided with grooves (13) matching with the protrusions (12).

5. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 4, characterized in that: The heat insulation layer (8) is made of ceramic fiber heat insulation material, and the heat insulation layer (8) is configured as a hollow cylinder with upper and lower openings.

6. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 4, characterized in that: The end cover 1 (4) and the end cover 2 (6) are both configured as semicircular rings. When the end cover 1 (4) and the end cover 2 (6) are assembled, a circular hole is formed at the center. The outer diameter of the heat insulation layer (8) is equal to the diameter of the circular hole.

7. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 6, characterized in that: The inner diameter of the heat insulation layer (8) is equal to the outer diameter of the graphite heater (9).

8. The graphite electromagnetic induction heating device based on high magnetic permeability ferrite material according to claim 7, characterized in that: A through hole (14) is provided at the center of the graphite heater (9).

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