Crucible pre-heating device

Abstract

The utility model relates to a crucible pre-heating device which comprises a heating device upper cover (1), upper cover lifting control columns (2), a lower heating box body (3), a control panel (4), a hot air loop pipe (5), a crucible heating assembly (6) and an exhaust pipe (7), and the two sides of the lower heating box body (3) are connected with the heating device upper cover (1) through the upper cover lifting control columns (2). A crucible heating assembly (6) is installed in a groove formed in the upper surface of the lower heating box body (3), a hot air loop pipe (5) is fixedly installed on the portion, over the crucible heating assembly (6), of the lower surface of the heating device upper cover (1), the hot air loop pipe (5) is communicated with an exhaust pipe (7) on the surface of the outer side of the heating device upper cover (1), and a control panel (4) is fixedly installed on the front portion of the lower heating box body (3). According to the crucible pre-heating device, a plurality of crucibles can be pre-heated quickly, water vapor on the surfaces of the crucibles can be effectively removed, the purity of materials is ensured, and the comparison realization efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to an experimental device, in particular to a crucible preheating device. Background Art

[0002] When heating a cooled crucible during an experiment, part of the time is spent on heating the crucible, which will waste a lot of time in material experiments that require a large number of comparisons. At the same time, a layer of water vapor will adhere to the surface of the crucible when it is cooled. Directly adding materials to the cooled crucible for heating will allow some water vapor to penetrate into the experimental materials, affecting the accuracy of the experiment.

[0003] At present, the utility model with patent number CN212902600U discloses a gas crucible furnace capable of preheating aluminum ingots, including a furnace shell, a crucible, a burner and an exhaust pipe. With the above technical solution, since the furnace body is connected to the heat storage chamber through a connecting channel, the burner sprays flames to heat the crucible in the flame channel, and after the flue gas heat energy enters the heat storage chamber through the connecting channel, the flue gas heat energy in the heat storage chamber is discharged outward through the exhaust pipe. Since a connecting elbow is provided at the upper end of the exhaust pipe, and a discharge tray is provided below the connecting elbow, the direction of exhaust gas heat energy discharged from the exhaust line is changed, and the aluminum ingots to be added to the crucible can be placed in the discharge tray. The aluminum ingots are preheated and baked by the discharged waste heat exhaust gas, which can evaporate the water of the aluminum ingots to be melted and heat and save energy before the lower crucible furnace, and the discharged exhaust heat energy is reasonably utilized, thereby improving the energy utilization rate. However, when heating the crucible, the high-temperature hot air in this application can only heat the outer surface of the crucible, and then directly enter the chamber along the connecting channel, which makes it impossible to heat the inside of the crucible, resulting in low heating efficiency. At the same time, this application can only heat one steel pot at a time, which is not very convenient to use. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a crucible preheating device, which can quickly preheat multiple crucibles, effectively remove water vapor on the surface of the crucible, ensure the purity of the material, and effectively improve the efficiency of comparison.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a crucible preheating device, comprising a heating device cover, a connecting pipe, an exhaust fan, an exhaust control valve, an upper cover lifting control column, a lower heating box, a control panel, a hot air circuit pipe, a crucible heating component, an insulation layer, a heating tank, a crucible support, a bottom heating end, a side heating end and an exhaust pipe. The two sides of the lower heating box are connected to the heating device cover through the upper cover lifting control columns, a groove is provided on the upper surface of the lower heating box for installing the crucible heating component, a hot air circuit pipe is fixedly installed on the lower surface of the heating device cover directly above the crucible heating component, the hot air circuit pipe is connected to the exhaust pipe on the outer surface of the heating device cover, and a control panel is fixedly installed on the front of the lower heating box.

[0006] In addition, the crucible preheating device according to the above embodiment of the utility model may also have the following additional technical features:

[0007] As a further improvement scheme of the utility model, the upper cover of the heating device includes a connecting pipe, an exhaust fan and an exhaust control valve. The upper end of the hot air loop pipe is connected to the exhaust control valve, the exhaust control valve is connected to the exhaust fan through the connecting pipe, and the exhaust fan is connected to the exhaust pipe through a pipeline.

[0008] As a further improvement scheme of the utility model, the crucible heating assembly includes an insulation layer, a heating tank, a crucible support, a bottom heating end and a side heating end. The heating tank of the crucible heating assembly is installed in the groove of the lower heating box, the heating tank is lined with an insulation layer, the side heating ends are fixedly installed at equal intervals on the inner side of the insulation layer near the bottom, the bottom heating end and the crucible support are fixedly installed at the bottom of the heating tank, the bottom heating end and the side heating end are respectively connected to their own electrically controlled gas valves through pipelines, and the electrically controlled gas valves are connected to the external gas supply pipeline through pipelines.

[0009] As a further improvement of the present invention, the upper cover of the heating device and the interior of the lower heating box are evacuated.

[0010] As a further improvement of the present utility model, a heat insulation film is provided on the upper cover of the heating device and the inner surface of the lower heating box.

[0011] As a further improvement of the present invention, the thermal insulation layer is marble or soapstone.

[0012] Through the above scheme, the utility model has at least the following advantages: compared with the conventional unheated crucible, by setting up multiple hot air loop pipes and crucible heating components, the bottom of the crucible is heated by means of the bottom heating end and the side heating end, and then the hot air is discharged from the hot air loop pipe extended into the crucible. After the hot air at the bottom of the crucible heats the outside of the crucible, it goes up along the gap between the outer wall of the crucible and the insulation layer to heat the entire outer wall of the crucible. Then the hot air flows along the outside of the hot air loop pipe and the inner wall of the crucible, thereby heating the inner wall of the crucible. Finally, it is discharged to the outside through the lower end of the hot air loop pipe, the exhaust control valve, the connecting pipe, the exhaust fan and the exhaust pipe. Therefore, multiple crucibles can be pre-heated quickly, the water vapor on the surface of the crucible can be effectively removed, the purity of the material can be ensured, and the efficiency achieved by comparison can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of a crucible preheating device;

[0014] Figure 2 It is a three-dimensional diagram of the upper cover of the heating device of the crucible pre-heating device;

[0015] Figure 3 It is a structural diagram of the crucible preheating device;

[0016] In the figure: 1. upper cover of the heating device, 1-1. connecting pipe, 1-2. exhaust fan, 1-3. exhaust control valve, 2. upper cover lifting control column, 3. lower heating box, 4. control panel, 5. hot air loop pipe, 6. crucible heating component, 6-1. insulation layer, 6-2. heating tank, 6-3. crucible support, 6-4. bottom heating end, 6-5. side heating end, 7. exhaust pipe. DETAILED DESCRIPTION

[0017] The crucible preheating device of the present invention will be described below in conjunction with the accompanying drawings.

[0018] In the first embodiment of the present application, Figure 1 and Figure 2As shown, the crucible pre-heating device (hereinafter referred to as "this patent") includes a heating device cover 1, a connecting pipe 1-1, an exhaust fan 1-2, an exhaust control valve 1-3, an upper cover lifting control column 2, a lower heating box 3, a control panel 4, a hot air circuit pipe 5, a crucible heating component 6, an insulation layer 6-1, a heating tank 6-2, a crucible support 6-3, a bottom heating end 6-4, a side heating end 6-5 and an exhaust pipe 7. The lower heating box 3 is connected to the heating device cover 1 on both sides through the upper cover lifting control column 2, the upper surface of the lower heating box 3 is provided with a groove for installing the crucible heating component 6, the hot air circuit pipe 5 is fixedly installed on the lower surface of the heating device cover 1 directly above the crucible heating component 6, the hot air circuit pipe 5 is connected to the exhaust pipe 7 on the outer surface of the heating device cover 1, and the control panel 4 is fixedly installed on the front of the lower heating box 3.

[0019] The utility model number is CN212902600U, which is a gas-fired crucible furnace capable of preheating aluminum ingots (hereinafter referred to as "the patent"). In the patent, when heating the crucible, the high-temperature hot gas can only heat the outer surface of the crucible, and then directly enter the chamber along the connecting channel, which makes it impossible to heat the inside of the crucible, resulting in low heating efficiency. At the same time, the patent can only heat one steel pot at a time, which is not very convenient to use. The patent uses the bottom heating end 6-4 and the side heating end 6-5 to heat the bottom of the crucible, and then extends into the crucible. The hot air loop pipe 5 inside the crucible discharges hot air, allowing the hot air at the bottom of the crucible to heat the outside of the crucible, and then flow upward along the gap between the outer wall of the crucible and the insulation layer 6-1 to heat the entire outer wall of the crucible. The hot air then flows along the outer side of the hot air loop pipe 5 and the inner wall of the crucible, thereby heating the inner wall of the crucible, thereby achieving unified heating of the inner and outer walls of the entire crucible, and by arranging multiple hot air loop pipes 5 and crucible heating components 6 in the heating device upper cover 1 and the crucible heating component 6, it is possible to heat multiple crucibles at one time, effectively improving the heating efficiency.

[0020] The structure of the second embodiment is basically the same as that of the first embodiment, except that Figure 3As shown, the upper cover 1 of the heating device includes a connecting pipe 1-1, an exhaust fan 1-2 and an exhaust control valve 1-3, the upper end of the hot air loop pipe 5 is connected to the exhaust control valve 1-3, the exhaust control valve 1-3 is connected to the exhaust fan 1-2 through the connecting pipe 1-1, and the exhaust fan 1-2 is connected to the exhaust pipe 7 through a pipeline. The crucible heating component 6 includes an insulation layer 6-1, a heating tank 6-2, a crucible support 6-3, a bottom heating end 6-4 and a side heating end 6-5, and the crucible The heating tank 6-2 of the crucible heating assembly 6 is installed in the groove of the lower heating box 3, the heating tank 6-2 is lined with an insulation layer 6-1, the inner side of the insulation layer 6-1 is fixedly installed with side heating ends 6-5 at equal intervals near the bottom, the bottom of the heating tank 6-2 is fixedly installed with a bottom heating end 6-4 and a crucible support 6-3, the bottom heating end 6-4 and the side heating end 6-5 are connected to their own electrically controlled gas valves through pipelines, and the electrically controlled gas valves are connected to an external gas supply pipeline through pipelines.

[0021] In order to further optimize the working efficiency of the present application and improve the thermal insulation performance, the upper cover 1 of the heating device and the lower heating box 3 are vacuumed. In order to further improve the thermal insulation performance, the inner surface of the upper cover 1 of the heating device and the lower heating box 3 is provided with a thermal insulation film. In order to allow the thermal insulation layer 6-1 to store more heat, the thermal insulation layer 6-1 is marble or soapstone.

[0022] When in use, install the crucible preheating device, connect the corresponding pipeline equipment and put it into use.

[0023] When the utility model is in use, the specific operations are as follows:

[0024] When in use, open the gas supply pipeline, turn on the device through the control panel 4, select the corresponding hot air loop pipe 5 and crucible heating component 6 to be used, put the crucible to be pre-heated into the crucible heating component 6, and use the control panel 4 to make the upper cover lifting control column 2 drive the upper cover 1 of the heating device to descend, and the hot air loop pipe 5 extends into the inside of the crucible. The bottom heating end 6-4 and the side heating end 6-5 start to heat the bottom of the crucible under the action of electric ignition, and then the hot air is discharged from the hot air loop pipe 5 extending into the crucible. The negative pressure generated makes the hot air at the bottom of the crucible After heating the outside of the crucible, the gas flows upward along the gap between the outer wall of the crucible and the insulation layer 6-1 to heat the entire outer wall of the crucible. The hot gas then flows along the outer side of the hot gas loop pipe 5 and the inner wall of the crucible, thereby heating the inner wall of the crucible. Finally, the hot gas is discharged to the outside through the lower end of the hot gas loop pipe 5, the exhaust control valve 1-3, the connecting pipe 1-1, the exhaust fan 1-2 and the exhaust pipe 7. After the heating is completed, the control panel 4 will issue a prompt, and the staff will choose when to open the upper cover 1 of the heating device to extract the corresponding crucible for material comparison experiments.

[0025] In summary, the crucible preheating device of the utility model embodiment, by setting multiple hot air loop pipes 5 and crucible heating components 6, heats the bottom of the crucible with the help of the bottom heating end 6-4 and the side heating end 6-5, and then discharges the hot air from the hot air loop pipe 5 extending into the crucible, so that the hot air at the bottom of the crucible heats the outside of the crucible, and then flows upward along the gap between the outer wall of the crucible and the insulation layer 6-1 to heat the entire outer wall of the crucible, and then the hot air flows along the outer side of the hot air loop pipe 5 and the inner wall of the crucible, thereby heating the inner wall of the crucible, and finally discharged to the outside through the lower end of the hot air loop pipe 5, the exhaust control valve 1-3, the connecting pipe 1-1, the exhaust fan 1-2 and the exhaust pipe 7, so that multiple crucibles can be preheated quickly, the water vapor on the surface of the crucible can be effectively removed, the purity of the material can be ensured, and the efficiency achieved by comparison can be effectively improved.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crucible preheating device, comprising a heating device upper cover (1), a lower heating box (3) and a control panel (4), characterized in that: The two sides of the lower heating box (3) are connected to the upper cover (1) of the heating device through the upper cover lifting control columns (2); a groove is provided on the upper surface of the lower heating box (3) to install the crucible heating component (6); a hot air loop pipe (5) is fixedly installed on the lower surface of the upper cover (1) of the heating device directly above the crucible heating component (6); the hot air loop pipe (5) is connected to the exhaust pipe (7) on the outer surface of the upper cover (1) of the heating device; and a control panel (4) is fixedly installed on the front of the lower heating box (3).

2. The crucible preheating device according to claim 1, characterized in that: The upper cover (1) of the heating device comprises a connecting pipe (1-1), an exhaust fan (1-2) and an exhaust control valve (1-3); the upper end of the hot air loop pipe (5) is connected to the exhaust control valve (1-3); the exhaust control valve (1-3) is connected to the exhaust fan (1-2) via the connecting pipe (1-1); and the exhaust fan (1-2) is connected to the exhaust pipe (7) via a pipeline.

3. The crucible preheating device according to claim 2, characterized in that: The crucible heating assembly (6) comprises a heat preservation layer (6-1), a heating groove (6-2), a crucible support (6-3), a bottom heating end (6-4) and a side heating end (6-5); the heating groove (6-2) of the crucible heating assembly (6) is installed in a groove of a lower heating box (3); the heating groove (6-2) is lined with a heat preservation layer (6-1); the side heating ends (6-5) are fixedly installed at equal intervals on the inner side of the heat preservation layer (6-1) near the lower part; the bottom of the heating groove (6-2) is fixedly installed with a bottom heating end (6-4) and a crucible support (6-3); the bottom heating end (6-4) and the side heating end (6-5) are respectively connected to respective electrically controlled gas valves through pipelines; and the electrically controlled gas valves are connected to an external gas supply pipeline through pipelines.

4. The crucible preheating device according to claim 1, characterized in that: The upper cover (1) of the heating device and the lower heating box (3) are evacuated.

5. The crucible preheating device according to claim 4, characterized in that: The upper cover (1) of the heating device and the inner surface of the lower heating box (3) are provided with a heat insulation film.

6. The crucible preheating device according to claim 3, characterized in that: The thermal insulation layer (6-1) is marble or soapstone.

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