Rapid heating furnace

Abstract

The utility model discloses a rapid heating furnace which comprises a vacuum device, a heating device arranged in the vacuum device, a quartz tube heated by the heating device, and a four-way joint structure detachably connected with the end part of the quartz tube. The heating device comprises an electrode holder and a graphite electrode arranged on the electrode holder, the quartz tube penetrates through the graphite electrode and extends out of the vacuum device, and the four-way connector is located outside the vacuum device. The vacuum device provides a vacuum environment for the heating device, the graphite electrode is prevented from being oxidized in the heating process, and more accurate temperature control is guaranteed. The graphite electrode is used for heating, and compared with a traditional electric heating wire and other structures, the heating rate is higher, the sustainable heating time is longer, and the temperature upper limit is higher. The quartz tube is inserted from one side of the electrode and is convenient to disassemble and assemble, and the catalyst is convenient to put in and take out. And the arrangement of the four-way joint is convenient for an external detection device to reflect the reaction condition in the quartz tube in real time, so that the reaction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, and more specifically to a rapid heating furnace. Background Art

[0002] The rapid heating furnace is a versatile laboratory equipment with a wide range of applications to meet the needs of different fields and research. When in use, the heating furnace can provide precise temperature control and is suitable for heating treatment of various materials, such as heat treatment processes of metals, ceramics, oxides, etc. It is also used for quantitative analysis, such as sample pretreatment in chemical analysis, and sintering experiments in materials science.

[0003] The rapid heating furnace consists of several parts: heating system, temperature measurement system, control system, vacuum and air intake system. The heating is done by existing common resistance wires or infrared lamps, which have problems such as uneven heating, slow heating rate, limited sustainable heating time and heating temperature. Utility Model Content

[0004] The utility model aims to provide a fast heating furnace to solve the technical problems existing in the above-mentioned background technology.

[0005] The technical solution of the utility model provides a rapid heating furnace, comprising a vacuum device, a heating device arranged in the vacuum device, a quartz tube heated by the heating device, and a four-way joint structure detachably connected to the end of the quartz tube;

[0006] The heating device comprises an electrode seat and a graphite electrode arranged on the electrode seat, the quartz tube passes through the graphite electrode and extends to the outside of the vacuum device, and the four-way joint is located outside the vacuum device.

[0007] In a preferred embodiment, the graphite electrode is a spiral cylindrical structure.

[0008] In a preferred embodiment, the electrode holder includes an electrode base, an insulating gasket and an insulating nest sleeved outside the electrode base, and an electrode pressing block bolted to the electrode base, and the electrode base and the electrode pressing block are correspondingly provided with arc-shaped pressing openings for fixing the graphite electrode.

[0009] In a preferred embodiment, the four-way joints are provided in two numbers and are respectively located at both ends of the quartz tube. A thermocouple is installed at one of the interfaces of the four-way joint, and an adapter for connecting with the quartz tube is installed at the interface opposite to the thermocouple. The thermocouple passes through the adapter and extends into the quartz tube.

[0010] In a preferred embodiment, the vacuum device comprises a vacuum chamber and a vacuum chamber cover located on the vacuum chamber, and a sealing ring is arranged on the top of the vacuum chamber.

[0011] In a preferred embodiment, a fixing piece is rotatably provided on the outer periphery of the vacuum chamber, and a fixing seat is provided on the vacuum chamber cover corresponding to the fixing piece.

[0012] In a preferred embodiment, the fixing member includes a fixing screw and a threaded pressure plate connected to the fixing screw, and the fixing seat is provided with a positioning opening adapted to the fixing screw.

[0013] The beneficial effects of the technical solution of the utility model are:

[0014] The vacuum device provides a vacuum environment for the heating device to prevent oxidation of the graphite electrode during the heating process and ensure more accurate temperature control. Heating through the graphite electrode has a higher heating rate, longer sustainable heating time and a higher temperature limit than traditional heating wires. The quartz tube is inserted from one side of the electrode, which is easy to disassemble and install, and is convenient for putting in and taking out the catalyst. The setting of the four-way joint is convenient for external detection devices to reflect the reaction situation in the quartz tube in real time and improve the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of the heating device of the utility model.

[0017] Figure 3 This is a schematic diagram of the overall structure of the utility model from another perspective.

[0018] Explanation of the reference numerals: 1 vacuum device, 11 vacuum chamber, 12 vacuum chamber cover, 13 sealing ring, 2 fixing part, 21 fixing screw, 22 threaded pressure plate, 23 fixing seat, 24 positioning opening, 3 heating device, 31 electrode seat, 311 electrode base, 312 insulating gasket, 313 insulating nest, 314 electrode pressing block, 315 arc pressure port, 32 graphite electrode, 4 quartz tube, 5 four-way joint, 6 thermocouple, 7 adapter, 8 window cover, 9 gas path joint. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the sake of illustration and convenience of description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0020] like Figure 1-Figure 2 As shown, the technical solution of the utility model provides a rapid heating furnace, comprising a vacuum device 1, a heating device 3 arranged in the vacuum device 1, a quartz tube 4 heated by the heating device 3, and a four-way joint 5 structure detachably connected to the end of the quartz tube 4. The heating device 3 comprises an electrode holder and a graphite electrode 32 arranged on the electrode holder 31, the quartz tube 4 passes through the graphite electrode 32 and extends to the outside of the vacuum device 1, and the four-way joint 5 is located outside the vacuum device 1.

[0021] The vacuum device 1 provides a vacuum environment for the heating device 3 to prevent the graphite electrode 32 from oxidizing during the heating process, thereby ensuring more accurate temperature control. Heating by the graphite electrode 32 has a higher heating rate, a longer sustainable heating time, and a higher upper temperature limit than conventional structures such as electric heating wires. The quartz tube 4 is inserted from one side of the graphite electrode 32, which is easy to disassemble and install, and is convenient for putting in and taking out the catalyst. The setting of the four-way connector 5 is convenient for external detection devices to reflect the reaction conditions in the quartz tube 4 in real time and improve the reaction effect.

[0022] The vacuum device 1 includes a vacuum cavity 11 and a vacuum cavity cover 12 located on the vacuum cavity 11, and a sealing ring 13 is arranged on the top of the vacuum cavity 11. The heating device 3 is arranged in the vacuum cavity 11, and a plurality of gas path joints 9 are arranged on the vacuum cavity 11, which can be externally connected to a vacuum pumping device to provide a vacuum environment for heating, or to provide an inert gas environment for ventilation. The window cover 8 on the back of the vacuum cavity 11 is connected to an infrared temperature measuring probe inserted into the vacuum cavity 11 to detect the internal temperature of the vacuum cavity 11. After the vacuum cavity cover 12 is closed, the vacuum cavity cover 12 is fixed to the vacuum cavity 11 by the fixing member 2.

[0023] The fixing part 2 is arranged on the periphery of the vacuum chamber 11, and a fixing seat 23 is arranged on the vacuum chamber cover 12 corresponding to the fixing part 2. The fixing part 2 includes a fixing screw 21 and a threaded pressure plate 22 connected to the fixing screw 21, and a positioning opening 24 adapted to the fixing screw 21 is arranged on the fixing seat 23. When fixing, the fixing screw 21 is rotated to make it located in the positioning opening 24, and then the threaded pressure plate 22 is twisted to make the threaded pressure plate 22 move downward to press the vacuum chamber cover 12. The above-mentioned arrangement ensures the sealing between the vacuum chamber cover 12 and the vacuum chamber 11, and is convenient for opening the vacuum chamber cover 12. When the required vacuum degree is reached in the vacuum chamber 11, the heating reaction work is carried out.

[0024] The gas reaction is carried out in the quartz tube 4. Before the reaction, the catalyst is first placed in the quartz tube 4. Specifically, a proper amount of quartz wool is inserted into the quartz tube 4 to fix the quartz wool inside the quartz tube 4 and prevent it from falling off. The catalyst required for the reaction is poured onto the quartz wool, and then a proper amount of quartz wool is inserted to clamp the catalyst between two sections of quartz wool. Then, the quartz tube 4 is passed through the graphite electrode 32, and the two ends are sealed and docked with the four-way joints 5 on both sides. After the docking is completed, the preparation work is completed. Then, the mixed gas required for the reaction is passed into the interior of the quartz tube 4 from the four-way joint 5, and heated by the heating device 3 to reach the temperature required for the reaction, and the reaction is carried out under the action of the catalyst.

[0025] The electrode holder includes an electrode base 311, an insulating gasket 312 and an insulating nest 313 sleeved outside the electrode base 311, and an electrode pressing block 314 bolted to the electrode base 311. The electrode base 311 and the electrode pressing block 314 are correspondingly provided with arc-shaped pressing openings 315 for fixing the graphite electrode 32.

[0026] The graphite electrode 32 is a spiral cylindrical structure. Compared with a straight cylindrical structure, the spiral graphite electrode 32 can increase the length of the current passing through and reduce the cross section of the current passing through, so that the heating power of the graphite electrode 32 to reach the same temperature is reduced, and the power consumption of the power used is reduced. The corresponding dissipated power of the graphite electrode 32 will also be reduced accordingly, and the heat dissipated outward by the graphite electrode 32 will also be reduced, further reducing the cooling power of the corresponding chiller required when cooling the vacuum chamber 11, thereby reducing the power consumption of the equipment as a whole.

[0027] The four-way joints 5 are provided in two numbers and are respectively located at the two ends of the quartz tube 4. A thermocouple 6 is installed at one of the interfaces of the four-way joint 5, and an adapter 7 for connecting with the quartz tube 4 is installed at the interface on the opposite side of the thermocouple 6. The thermocouple 6 passes through the adapter 7 and extends into the quartz tube 4.

[0028] The four-way joint 5 on one side of the quartz tube 4 has an air inlet interface and a pressure gauge interface, and the other two are the interfaces of the thermocouple 6 and the adapter 7. The four-way joint 5 on the other side has an air outlet interface and a vacuum gauge interface, and the other two are the interfaces of the thermocouple 6 and the adapter 7. The pressure gauge is used to detect the internal pressure of the quartz tube 4, and the vacuum gauge is used to detect the vacuum degree in the quartz tube 4 to ensure that the reaction proceeds smoothly and safely.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A rapid heating furnace, characterized in that: It comprises a vacuum device, a heating device arranged in the vacuum device, a quartz tube heated by the heating device, and a four-way joint structure detachably connected to the end of the quartz tube; The heating device comprises an electrode seat and a graphite electrode arranged on the electrode seat, the quartz tube passes through the graphite electrode and extends to the outside of the vacuum device, and the four-way joint is located outside the vacuum device.

2. A rapid heating furnace according to claim 1, characterized in that: The graphite electrode is a spiral cylinder structure.

3. The rapid heating furnace according to claim 1, characterized in that: The electrode holder comprises an electrode base, an insulating gasket and an insulating nest sleeved outside the electrode base, and an electrode pressing block bolted to the electrode base. The electrode base and the electrode pressing block are correspondingly provided with arc-shaped pressing openings for fixing the graphite electrode.

4. The rapid heating furnace according to claim 1, characterized in that: The four-way joints are provided in two numbers and are respectively located at the two ends of the quartz tube. A thermocouple is installed at one of the interfaces of the four-way joint, and an adapter for connecting with the quartz tube is installed at the interface opposite to the thermocouple. The thermocouple passes through the adapter and extends into the quartz tube.

5. The rapid heating furnace according to claim 1, characterized in that: The vacuum device comprises a vacuum cavity and a vacuum cavity cover located on the vacuum cavity, and a sealing ring is arranged on the top of the vacuum cavity.

6. A rapid heating furnace according to claim 5, characterized in that: A fixing piece is rotatably arranged on the outer periphery of the vacuum chamber, and a fixing seat is arranged on the vacuum chamber cover corresponding to the fixing piece.

7. A rapid heating furnace according to claim 6, characterized in that: The fixing member comprises a fixing screw and a threaded pressure plate connected to the fixing screw, and the fixing seat is provided with a positioning opening adapted to the fixing screw.

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