CN209910386U

CN209910386U - High-temperature electrical heating furnace

Info

Publication number: CN209910386U
Application number: CN201920415639.4U
Authority: CN
Inventors: 方辉
Original assignee: Wuhan Partulab Technology Co Ltd
Current assignee: Wuhan Partulab Technology Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-07
Anticipated expiration: 2029-03-29

Abstract

The utility model belongs to the technical field of the material measurement is used, a high temperature electricity heating furnace is disclosed, include: the hearth inner container is of a hollow structure with one open end; the hearth core is sleeved outside the hearth inner container and used for heating the hearth inner container; the hearth shell comprises a bottom plate, an outer cover and an air valve; the bottom plate is used for fixedly connecting the hearth inner container and the hearth core, and is provided with a through hole matched with the opening of the hearth inner container; the outer cover is fixedly connected with the bottom plate and used for covering the hearth core; the air valve is arranged on the outer cover and is communicated with the hearth inner container through an air pipe. The beneficial effects of the utility model include: the gas mixing function is convenient and fast while good heating and heat preservation are realized.

Description

High-temperature electrical heating furnace

Technical Field

The utility model belongs to the technical field of the material measurement application technique and specifically relates to a high temperature electricity heating furnace is related to.

Background

In recent years, with the rapid development of the electronic and information industries, further requirements are made on test sample testing techniques. The physical properties of the test samples vary greatly between different temperatures and gaseous environments. The market demand for high-temperature electrical heating furnaces is increasing day by day, and the high-temperature electrical heating furnaces are mainly applied to electrical measurement heating devices of various enterprises, scientific research units, university laboratories and the like, and are indispensable instruments for various electrical measurements.

At the present stage, a plurality of heating furnaces cannot well meet the electrical measurement requirements, and the problems of no gas mixing function, poor sealing, insufficient heat dissipation speed, no internal shielding cover and the like exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a high temperature electricity heating furnace, solve the technical problem who does not have the function of mixing gas among the prior art.

In order to achieve the above technical purpose, the technical solution of the present invention provides a high temperature electrical heating furnace, including:

the hearth inner container is of a hollow structure with one open end;

the hearth core is sleeved outside the hearth inner container and used for heating the hearth inner container; and

the hearth shell comprises a bottom plate, an outer cover and an air valve; the bottom plate is used for fixedly connecting the hearth inner container and the hearth core, and is provided with a through hole matched with the opening of the hearth inner container; the outer cover is fixedly connected with the bottom plate and used for covering the hearth core; the air valve is arranged on the outer cover and is communicated with the hearth inner container through an air pipe.

Compared with the prior art, the beneficial effects of the utility model include: the gas mixing function is convenient and fast while good heating and heat preservation are realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is an enlarged view at A in FIG. 4;

FIG. 6 is an enlarged view at B in FIG. 4;

fig. 7 is an enlarged view at C in fig. 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 4, the utility model provides a high-temperature electrical heating furnace, which comprises: a hearth liner 100, a hearth core 200 and a hearth casing 300.

The hearth liner 100 is a hollow structure with an opening at one end, and the hollow structure is used for reserving a space for the test fixture so that the test fixture can clamp a test sample to stretch into the test fixture for high-temperature test.

The hearth core 200 is sleeved outside the hearth liner 100 and used for heating the hearth liner 100 and providing the environment temperature required by the test for the test sample to be detected.

The furnace enclosure 300 includes a floor 310, a hood 320, and a gas valve 330; the bottom plate 310 is used for fixedly connecting the hearth liner 100 and the hearth core 200, and the bottom plate 310 is provided with a through hole matched with the opening of the hearth liner 100; the outer cover 320 is fixedly connected with the bottom plate 310 and is used for covering the hearth core 200; the air valve 330 is disposed on the outer cover 320 and is communicated with the hearth liner 100 through an air pipe.

When the high-temperature electric heating furnace is used, the high-temperature electric heating furnace is matched with the measuring device to work, and generally, the working mode that the high-temperature electric heating furnace and a clamp of the measuring device move relatively is adopted, so that a test sample to be measured is placed into the furnace body, or the test sample to be measured is taken out from the furnace body. The furnace body can be fixed, and the clamp can move; or the furnace body can move after being fixed by a clamp. Since basically all the components of the high-temperature electric heating furnace are connected to the bottom plate 310 of the hearth shell 300, the furnace body can be fixed or driven by fixing or driving the bottom plate 310. The opening of the hearth liner 100 can be matched with the surface of a measuring device, and the hearth liner 100 is sealed by means of a sealing ring to form a sealing space. During measurement, specific gas can be filled into the hearth liner 100 through the gas valve 330 to meet the test requirements of different gas environments.

In order to avoid the leakage of heat energy in the furnace, a specific scheme is provided: an insulating space 400 is formed between the outer cover 320 of the furnace shell 300 and the furnace core 200. Thermal-insulated space 400 can reduce by the direct action of the heat energy that furnace core 200 escaped on furnace shell 300, can realize keeping warm to furnace core 200 on the one hand, guide the heat energy that is produced by furnace core 200 to act on furnace inner bag 100, improve heat utilization efficiency, on the other hand avoids causing the injury because of furnace shell 300 is overheated to equipment or operator. On the basis, a further optimization scheme is proposed: the outer cover 320 of the furnace casing 300 is provided with a fan 340 for exchanging heat with the heat insulating space 400. When the heat energy in the heat insulation space 400 is excessively accumulated, the fan 340 drives the air in the heat insulation space 400 to exchange with the outside, so that the active cooling is realized. Since the enclosure 320 of the firebox housing 300 does not require a sealing structure and a sealing connection between the enclosure 320 and the bottom plate 310, the firebox housing 300 can have a plurality of gaps for air flow, which can help to achieve air flow when the fan 340 is operated. The fan 340 may be of a suction-exhaust type or a type of blowing air into the heat insulation space 400, but in consideration of effective restriction of hot air from the heat insulation space 400, it is preferable that the fan 340 is of a suction-exhaust type.

Usually, the measuring device is driven by electric energy, and for unified energy supply, the high-temperature electric heating furnace can also be driven by electric energy, so that a specific scheme is provided: the floor 310 of the furnace enclosure 300 is provided with a probe assembly 500 for connecting an external power supply connection to the furnace and an electrical load within the furnace. The electric appliance in the furnace comprises a hearth core 200 and a fan 340, and the power supply connector outside the furnace can be arranged on the surface of the measuring device. Namely, when the high-temperature electric heating furnace reaches the working position, the probe assembly 500 can be connected with the power supply connector outside the furnace, and when the high-temperature electric heating furnace leaves the working position, the power supply is automatically interrupted, so that the condition of empty burning of a hearth is effectively prevented, and potential safety hazards are avoided. As a further specific scheme: the probe assembly 500 includes a copper pin and a power supply circuit electrically connected to each other, the copper pin is used to connect a power supply connector outside the furnace, and the power supply circuit is used to connect an electrical appliance inside the furnace. The copper needle is used as a contact, so that the on-off of a circuit can be realized; the power supply circuit can adopt a conventional parallel circuit to respectively supply power to electric appliances in the furnace, such as the hearth core 200, the fan 340 and the like. Of course, the power supply circuit may be in the form of a circuit board, and the copper pins may be directly soldered to the circuit board, and the circuit board may be fixed on the bottom plate 310 of the furnace casing 300, and specifically, the circuit board may be fixed on the bottom plate 310 through copper pillar connectors.

As a specific scheme of the hearth core: as shown in fig. 5, the furnace core 200 includes a furnace core body 210, and a furnace core fixing frame 220 for fixing the furnace core body 210.

The hearth core body 210 comprises a first heat insulation member 211, and a heating element (not labeled in the figure) located between the first heat insulation member 211 and the hearth inner container 100; the heating element is a heating wire, and the furnace core body 210 further includes a heating wire fixing ceramic 212 which is provided on the first heat insulating member 211 and used for fixing the heating wire, as shown in fig. 6. The heating wire generates heat when being electrified, and has the characteristics of both the electric conductor and the heating element, and the ceramic is a good insulator and has good high-temperature insulating performance, so that the ceramic is very suitable for being used as a fixing body of the heating wire. The first insulating member 211 may be a conventional insulating material such as glass fiber, asbestos, rock wool, silicate, etc., or may be a novel insulating material such as aerogel blanket, vacuum panel, etc. The heating wire fixing ceramic 212 plays a role of switching wires, namely two ends of the heating wire of the hearth are connected with two fixing holes on one side of the heating wire fixing ceramic 212, and then two fixing holes on the other side which are correspondingly connected in series are externally connected with 220V power supply L/N wires.

Consider that furnace core body receives its material restriction, relatively difficult punching fixed, so the preferred frame construction of furnace core mount specifically is: referring to fig. 5 again, the furnace core fixing frame 220 includes an upper plate 221 and a lower plate 222 for fixing the upper and lower ends of the heating element and the first heat insulating member 211, respectively, and a connecting rod 223 connecting the upper plate 221 and the lower plate 222, wherein the lower plate 222 is connected to the bottom plate 310 of the furnace housing 300. To avoid the heat generated by the hearth core 200 from escaping towards the floor 310, further optimization is proposed here: the lower plate 222 is connected to the bottom plate 310 of the firebox housing 300 by screws and nuts, and a second heat insulating member 224 is installed on the screws between the lower plate 222 and the bottom plate 310. The screw and the nut separate the lower plate 222 of the furnace core fixing frame 220 from the bottom plate 310 of the furnace casing 300 for heat insulation, and the second heat insulation member 224 may be made of the material of the first heat insulation member 211, preferably an aluminum pipe, so as to be sleeved on the screw, and provide sufficient support for the lower plate 222 of the furnace core fixing frame 220 while heat insulation.

As a specific scheme of the hearth inner container: as shown in fig. 7, the open end of the furnace liner 100 extends out of the bottom plate 310 of the furnace casing 300, and is reversely bent and connected to the bottom plate 310 by a third heat insulating member 350. The opening of furnace inner bag 100 has been prolonged promptly, and the open end reverse bending department temperature of furnace inner bag 100 is lower like this, can reduce the influence of other cooperation instruments of high temperature (for example test fixture etc.), lets the sealing washer temperature of seal department rubber material be unlikely to too high and lead to influencing sealing performance when furnace heats promptly. The third thermal insulator 350 may be made of the material of the first thermal insulator 211.

Preferably, the hearth liner 100 can be made of 2520 stainless steel or quartz glass, and has good heat insulation and corrosion resistance.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high-temperature electrical heating furnace, characterized by comprising:

the hearth inner container is of a hollow structure with one open end;

2. A high temperature electrical furnace according to claim 1, wherein: and a heat insulation space is formed between the outer cover of the hearth shell and the hearth core.

3. A high temperature electrical furnace according to claim 2, wherein: and a fan used for exchanging heat with the heat insulation space is arranged on the outer cover of the hearth shell.

4. A high temperature electrical furnace according to claim 1, wherein: and a probe assembly for connecting the power supply connector outside the furnace and the electrical appliance inside the furnace is arranged on the bottom plate of the hearth shell.

5. A high temperature electrical heater according to claim 4, wherein: the probe assembly comprises a copper needle and a power supply circuit which are electrically connected with each other, the copper needle is used for connecting a power supply connector outside the furnace, and the power supply circuit is used for connecting an electric appliance inside the furnace.

6. A high temperature electrical furnace according to claim 1, wherein: the hearth core comprises a hearth core body and a hearth core fixing frame for fixing the hearth core body;

the hearth core body comprises a first heat insulation piece and a heating component positioned between the first heat insulation piece and the hearth inner container;

the hearth core fixing frame comprises an upper plate, a lower plate and a connecting rod, wherein the upper plate and the lower plate are used for fixing the upper end and the lower end of the heating assembly and the upper end and the lower end of the first heat insulation piece respectively, the connecting rod is connected with the upper plate and the lower plate, and the lower plate is connected with a bottom plate of the hearth shell.

7. A high temperature electrical heater according to claim 6, wherein: the heating assembly is a heating wire, and the hearth core body is further composed of heating wires arranged on the first heat insulation piece and used for fixing the heating wires of the heating wires.

8. A high temperature electrical heater according to claim 6, wherein: the lower plate is connected with a bottom plate of the hearth shell through a screw and a nut, and a second heat insulation piece is sleeved on the screw between the lower plate and the bottom plate.

9. A high temperature electrical furnace according to claim 1, wherein: the open end of the hearth liner extends out of the bottom plate of the hearth shell and is connected with the bottom plate through a third heat insulation piece after being bent reversely.