Microwave hot-pressing experimental device

Abstract

The utility model provides a microwave hot-pressing experiment device which comprises a press machine, a microwave heating device and a pressure transmission component, the microwave heating device is arranged on a press machine body, a microwave source outputs microwaves to a microwave cavity through a waveguide tube, and a first cut-off waveguide hole is formed in the top of the microwave cavity; the pressure transmission part is vertically inserted into the first cut-off waveguide hole and located under the pressure head, the pressure transmission part can slide up and down relative to the first cut-off waveguide hole so as to press the solid material in the microwave cavity under the pressure of the pressure head, and the pressure transmission part is made of a high-temperature-resistant micro-wave-absorbing or non-wave-absorbing material. According to the microwave hot-pressing experimental device, microwave heating is adopted, materials can be directly and rapidly heated in a non-contact mode, heat loss of the materials is reduced, meanwhile, in the microwave heating process, the solid materials are pressed downwards through the pressure transmission component by the press machine, and the heating requirement of the solid materials under a certain pressure is met.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot pressing equipment, specifically relating to a microwave hot pressing experimental device. Background Technology

[0002] In the field of scientific research, some solid materials expand and deform when heated during experiments, such as the sintering of alumina test blocks. Expansion and deformation can make these solid materials loose and reduce their performance. Therefore, when heating such solid materials, it is necessary to carry out the process under a certain pressure to suppress their expansion and deformation, ensure that their performance is not affected, or make the material more compact and improve its performance.

[0003] Currently, there is no relevant experimental equipment that can heat such solid materials under certain pressure, and the problem of thermal expansion affecting their performance cannot be solved. Summary of the Invention

[0004] This invention provides a microwave hot pressing experimental device that can heat solid materials under a certain pressure.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a microwave hot pressing experimental device, comprising:

[0006] A press, comprising a body, a lifting mechanism, and a pressure head connected to the output end of the lifting mechanism;

[0007] A microwave heating device, which is mounted on the body, includes a microwave cavity and a microwave source. The microwave source outputs microwaves to the microwave cavity through a waveguide. A vertically extending first cutoff waveguide hole is formed at the top of the microwave cavity.

[0008] The pressure transmission component is vertically inserted into the first cutoff waveguide hole and located directly below the pressure head. The pressure transmission component can slide up and down relative to the first cutoff waveguide hole so as to press down the solid material in the microwave cavity under the pressure of the pressure head. The pressure transmission component is made of high-temperature resistant micro-absorbing or non-absorbing material.

[0009] The technical solution of this utility model also includes the following additional technical features:

[0010] The machine body includes a base and a frame fixed above the base. The lifting mechanism is located on the frame. The microwave heating device is located on the base and above the base. A vertically extending second cutoff waveguide hole is formed at the bottom of the microwave cavity.

[0011] The microwave hot pressing experimental device also includes a pressure-bearing component for supporting the solid material; the pressure-bearing component is vertically inserted into the second cutoff waveguide hole, with its bottom end fixed on the base and its top end extending into the microwave cavity; the pressure-bearing component is made of a high-temperature resistant micro-absorbing or non-absorbing material.

[0012] The pressure-bearing component and the pressure-transmitting component are directly opposite each other.

[0013] A first cutoff waveguide coaxial with the first cutoff waveguide hole is fixed inside the first cutoff waveguide hole, and the pressure transmission component is adapted to be inserted into the first cutoff waveguide.

[0014] A second cutoff waveguide coaxial with the second cutoff waveguide hole is fixed inside the second cutoff waveguide hole, and the pressure-bearing component is adapted to be inserted into the second cutoff waveguide.

[0015] The microwave heating device also includes an auxiliary heating plate, which is made of a strong microwave absorbing material and is used to be sandwiched between the solid material and the pressure transmission component, and between the solid material and the pressure-bearing component, so as to conduct heat to the solid material.

[0016] The microwave heating device is equipped with electronic temperature measuring elements.

[0017] The microwave heating device is equipped with a cooling fan for dissipating heat from the microwave source.

[0018] Compared with the prior art, the present invention has the following advantages and positive effects:

[0019] 1. The microwave hot pressing experimental device of this utility model uses microwave heating, which enables the solid material to be heated in a non-contact, direct and rapid manner, reducing heat loss from the material; at the same time, during the microwave heating process, the press presses down on the solid material through the pressure transmission component, meeting the heating requirements of the solid material under a certain pressure.

[0020] 2. The pressure transmission component is made of high-temperature resistant micro-absorbing or non-absorbing material, which can withstand the high-temperature environment of the microwave cavity and will not affect the microwave field. By using the pressure transmission component as an intermediate force transmission component, the pressure head of the press does not come into contact with the microwave field, which can ensure the reliability of the press. Attached Figure Description

[0021] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the microwave hot pressing experimental device in the embodiment of this utility model;

[0023] Figure 2 for Figure 1 The front view;

[0024] Figure 3 for Figure 2 AA sectional view.

[0025] Reference numerals: 10. Press; 11. Press head; 12. Operation control panel; 13. Base; 14. Frame; 20. Microwave heating equipment; 21. Microwave cavity; 22. Microwave source; 23. First cutoff waveguide hole; 24. First cutoff waveguide tube; 25. Second cutoff waveguide hole; 26. Second cutoff waveguide tube; 27. Auxiliary heating plate; 30. Pressure transmission component; 40. Pressure-bearing component; 50. Electronic temperature measuring element; 60. Cooling fan; 70. Solid material. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Reference Figures 1 to 3 In some embodiments of this utility model, a microwave hot pressing experimental device is proposed, including a press 10, a microwave heating device 20, and a pressure transmission component 30.

[0029] The press 10 includes a body, a lifting mechanism, and a pressure head 11 connected to the output end of the lifting mechanism. The pressure head 11 is driven by the lifting mechanism to press down or move up. The lifting mechanism (not shown) can be an existing electric screw lifting mechanism or hydraulic lifting mechanism of the press 10, etc. The working principle of the press 10 is also the same as the existing technology, and will not be described in detail here. The press 10 is equipped with an operation control panel 12 for convenient operation and real-time monitoring and control.

[0030] The microwave heating device 20 is mounted on the body of the press 10 and includes a microwave cavity 21 and a microwave source 22. The microwave source 22 couples microwaves to the microwave cavity 21 through a waveguide and outputs them. A vertically extending first cutoff waveguide hole 23 is formed at the top of the microwave cavity 21. The microwave heating device 20 can be a microwave muffle furnace or other microwave heating device 20, and there is no limitation on it.

[0031] The pressure transmission component 30 is vertically inserted into the first cutoff waveguide hole 23 and located directly below the pressure head 11. The pressure transmission component 30 can slide up and down relative to the first cutoff waveguide hole 23 so that it can press down on the solid material 70 in the microwave cavity 21 under the pressure of the pressure head 11. That is, the pressure transmission component 30 can transfer the pressure of the press 10 to the solid material 70 in the microwave cavity 21. The pressure transmission component 30 is made of a high-temperature resistant micro-absorbing or non-absorbing material, which is a poor conductor of heat, such as quartz, corundum, or mullite. Therefore, when the pressure head 11 presses down on the pressure transmission component 30 to transfer the pressure to the solid material 70 in the microwave cavity 21, the heat in the microwave cavity 21 will not be conducted to the pressure head 11 of the press 10 through the pressure transmission component 30, avoiding high temperature damage to the pressure head 11 and ensuring the safe use of the press 10.

[0032] This novel microwave hot pressing experimental device utilizes microwave heating to achieve non-contact, direct, and rapid heating of solid material 70, reducing heat loss and improving heating efficiency and consistency. Simultaneously, during microwave heating, the press 10 presses down on the solid material 70 through the pressure transmission component 30, meeting the heating requirements of the solid material 70 under a certain pressure. The pressure transmission component 30 is made of high-temperature resistant micro-absorbing or non-absorbing material, capable of withstanding the high-temperature environment of the microwave cavity 21 without affecting the microwave field. By using the pressure transmission component 30 as an intermediate force transmission element, the pressure head 11 of the press 10 does not contact the microwave field, ensuring the reliability of the press 10. The pressure transmission component 30, being made of micro-absorbing or non-absorbing material and inserted into the first cutoff waveguide hole 23, also prevents microwave leakage through the first cutoff waveguide hole 23.

[0033] The pressure transmission component 30 can be connected to the pressure head 11 or not, as long as it can slide up and down relative to the first cutoff waveguide hole 23 under vertical external force.

[0034] In some embodiments of this utility model, the machine body includes a base 13 and a frame 14 fixed above the base 13, and a lifting mechanism is provided on the frame 14.

[0035] The microwave heating device 20 is mounted on and above the base 13, and a vertically extending second cutoff waveguide hole 25 is formed at the bottom of the microwave cavity 21.

[0036] The microwave hot pressing experimental device also includes a pressure-bearing component 40, which is used to support the solid material 70 in the microwave cavity 21. The pressure-bearing component 40 is vertically inserted into the second cutoff waveguide hole 25, and its bottom end is fixed on the base 13, while its top end extends into the microwave cavity 21. The pressure-bearing component 40 is made of a high-temperature resistant micro-absorbing or non-absorbing material.

[0037] The pressure-bearing component 40 supports the solid material 70 in the microwave cavity 21 and also serves a pressure-bearing function, supporting the solid material 70 so that it can stably withstand the pressure transmitted by the press 10 through the pressure transmission component 30. The pressure-bearing component 40 passes through the microwave cavity 21 and is fixed at its bottom end to the base 13, so that the pressure of the press 10 does not act on the cavity wall of the microwave cavity 21, avoiding high pressure acting on the microwave equipment and causing damage to the microwave equipment. At the same time, the pressure-bearing component 40 is made of high-temperature resistant micro-absorbing or non-absorbing material, is a poor conductor of heat and does not absorb microwaves or only slightly absorbs microwaves, can withstand the high-temperature environment of the microwave cavity 21 and does not affect the microwave field. Its insertion into the second cutoff waveguide hole 25 can also prevent microwave leakage through the second cutoff waveguide hole 25.

[0038] Similarly, the pressure-bearing component 40 can also be made of materials such as quartz, corundum or mullite.

[0039] Furthermore, the pressure-bearing component 40 and the pressure transmission component 30 are directly opposite each other to ensure that the solid material 70 is stably pressurized.

[0040] In some embodiments of this utility model, a first cutoff waveguide 24 coaxial with the first cutoff waveguide hole 23 is fixedly disposed therein, and a pressure transmission component 30 is adapted to be inserted into the first cutoff waveguide 24. A gap exists between the pressure transmission component 30 and the first cutoff waveguide 24 to ensure that it can slide up and down. The first cutoff waveguide 24 also guides the up and down sliding of the pressure transmission component 30, ensuring that it is aligned with the solid material 70 in the microwave cavity 21.

[0041] Similarly, a second cutoff waveguide 26 coaxial with it is fixed inside the second cutoff waveguide hole 25, and the pressure-bearing component 40 is adapted to be inserted into the second cutoff waveguide 26. Unlike the pressure transmission component 30, the pressure-bearing component 40 does not need to slide up and down.

[0042] In some embodiments of this utility model, the microwave heating device 20 further includes an auxiliary heating plate 27, which is made of a strong microwave absorbing material and is used to be sandwiched between the solid material 70 and the pressure transmission component 30, and between the solid material 70 and the pressure-bearing component 40, so as to conduct heat to the solid material 70.

[0043] When the solid material 70 is a non-absorbing or slightly absorbing material, the microwave field cannot heat it or the heating efficiency is extremely low. In this case, the auxiliary heating plate 27 is used. The auxiliary heating plate 27 can be heated quickly in the microwave field, and then the heat is transferred to the solid material 70 through heat conduction, so as to achieve high-temperature heating of the solid material 70. This makes the microwave hot pressing experimental device of this utility model applicable to the reaction of non-absorbing solid materials 70 under high temperature and certain pressure, thus improving the versatility of the device.

[0044] The auxiliary heating plate 27 can be a silicon carbide auxiliary heating plate, etc., and can be placed directly between the solid material 70 and the pressure transmission component 30, or between the solid material 70 and the pressure-bearing component 40 when needed.

[0045] In some embodiments of this utility model, the microwave heating device 20 is equipped with an electronic temperature measuring element 50, such as an infrared temperature measuring element, to monitor the temperature of the solid material 70 in real time.

[0046] In some embodiments of this utility model, the microwave heating device 20 is equipped with a cooling fan 60 to dissipate heat from the microwave source 22, ensuring the reliable operation of the microwave source 22. The microwave source 22 may specifically be a magnetron or similar device.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A microwave hot pressing experimental apparatus, characterized in that, include: A press, comprising a body, a lifting mechanism, and a pressure head connected to the output end of the lifting mechanism; A microwave heating device, which is mounted on the body, includes a microwave cavity and a microwave source. The microwave source outputs microwaves to the microwave cavity through a waveguide. A vertically extending first cutoff waveguide hole is formed at the top of the microwave cavity. The pressure transmission component is vertically inserted into the first cutoff waveguide hole and located directly below the pressure head. The pressure transmission component can slide up and down relative to the first cutoff waveguide hole so as to press down the solid material in the microwave cavity under the pressure of the pressure head. The pressure transmission component is made of high-temperature resistant micro-absorbing or non-absorbing material.

2. The microwave hot pressing experimental apparatus according to claim 1, characterized in that, The machine body includes a base and a frame fixed above the base. The lifting mechanism is located on the frame. The microwave heating device is located on the base and above the base. A vertically extending second cutoff waveguide hole is formed at the bottom of the microwave cavity. The microwave hot pressing experimental device also includes a pressure-bearing component for supporting the solid material; the pressure-bearing component is vertically inserted into the second cutoff waveguide hole, with its bottom end fixed on the base and its top end extending into the microwave cavity; the pressure-bearing component is made of a high-temperature resistant micro-absorbing or non-absorbing material.

3. The microwave hot pressing experimental apparatus according to claim 2, characterized in that, The pressure-bearing component and the pressure-transmitting component are directly opposite each other.

4. The microwave hot pressing experimental apparatus according to claim 1, characterized in that, A first cutoff waveguide coaxial with the first cutoff waveguide hole is fixed inside the first cutoff waveguide hole, and the pressure transmission component is adapted to be inserted into the first cutoff waveguide.

5. The microwave hot pressing experimental apparatus according to claim 2, characterized in that, A second cutoff waveguide coaxial with the second cutoff waveguide hole is fixed inside the second cutoff waveguide hole, and the pressure-bearing component is adapted to be inserted into the second cutoff waveguide.

6. The microwave hot pressing experimental apparatus according to claim 2, characterized in that, The microwave heating device also includes an auxiliary heating plate, which is made of a strong microwave absorbing material and is used to be sandwiched between the solid material and the pressure transmission component, and between the solid material and the pressure-bearing component, so as to conduct heat to the solid material.

7. The microwave hot pressing experimental apparatus according to claim 1, characterized in that, The microwave heating device is equipped with electronic temperature measuring elements.

8. The microwave hot pressing experimental apparatus according to claim 1, characterized in that, The microwave heating device is equipped with a cooling fan for dissipating heat from the microwave source.

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