Thermal insulation structure of horizontal high-temperature intermediate frequency furnace

Abstract

The utility model discloses a horizontal high temperature intermediate frequency furnace heat preservation structure which comprises a furnace tube, a plurality of crucibles, a first heat preservation layer, a second heat preservation layer and an induction coil, the furnace tube is horizontally placed and is made of high temperature resistant graphite, and the plurality of crucibles are evenly arranged in the furnace tube at intervals. The first heat preservation layer wraps the outer wall of the furnace tube and is made of fire-resistant carbonaceous high-temperature ceramic, the second heat preservation layer wraps the first heat preservation layer and is made of fire-resistant magnesium fiber mullite, the induction coil is wound on the second heat preservation layer, and the head end and the tail end of the induction coil are connected with a water inlet pipe and a water outlet pipe respectively. Two heat preservation layers made of high-temperature-resistant materials are adopted, the heat preservation effect is good, the service life of the heat preservation layers is long, the induction coil is not prone to being damaged, the use cost is low, the failure rate is low, the overall energy consumption is low, and the use requirement is effectively met.

Description

Technical Field

[0001] The utility model belongs to the field of heating and heat preservation, and particularly relates to a horizontal high-temperature medium-frequency furnace heat preservation structure with good heat preservation effect, long service life, induction coil not easy to be damaged, low use cost, low failure rate and low energy consumption. Background Art

[0002] Induction heating uses the principle of electromagnetic induction to generate eddy currents in the workpiece placed in the induction coil, thereby causing the workpiece to heat up and heat to the required temperature. The horizontal continuous push rod medium frequency furnace is achieved in this way. The furnace shell is the main carrier of the device. By adopting a protective gas atmosphere, the product in the crucible can be heated to 2000-2300℃ under the action of the medium frequency power supply, induction coil, etc. The insulation layer in the furnace is particularly important for the stability of the induction furnace. At present, the insulation layer is basically made of ceramic refractory fiber materials, carbon felt, graphite felt and other related refractory insulating materials. This insulation layer is suitable for use in low-temperature medium frequency furnaces below 1600℃. As the temperature rises to 2000℃ and above, the existing traditional insulation layer cannot meet the use requirements. The insulation layer is prone to failure and has a short service life. The induction coil is easily burned and damaged, with a high failure rate. The medium frequency power supply consumes a lot of electricity and cannot effectively meet the use requirements.

[0003] The technical problem to be solved by the utility model is to provide a horizontal high-temperature medium-frequency furnace insulation structure with good insulation effect, long insulation layer service life, non-destructive induction coil, low use cost, low failure rate, low energy consumption, and effective satisfaction of use requirements. Utility Model Content

[0004] In order to solve the problems of the above-mentioned prior art, such as the insulation layer is easy to fail and has a short service life, the induction coil is easy to burn and damage, the failure rate is high, the medium frequency power supply consumes a lot of power, and cannot effectively meet the use requirements, the utility model adopts the following technical solutions:

[0005] The utility model provides a horizontal high-temperature medium-frequency furnace insulation structure, comprising a furnace tube, a plurality of crucibles, a first insulation layer, a second insulation layer and an induction coil, the furnace tube is placed horizontally and is made of high-temperature resistant graphite, the plurality of crucibles are evenly spaced in the furnace tube, the first insulation layer is wrapped around the outer wall of the furnace tube and is made of refractory carbon high-temperature ceramics, the second insulation layer is wrapped around the first insulation layer and is made of refractory magnesia fiber mullite, the induction coil is wound on the second insulation layer and is respectively connected to a water inlet pipe and a water outlet pipe at both ends.

[0006] Preferably, the water inlet pipe is provided with a pressure gauge and a first thermometer, and the water outlet pipe is provided with a second thermometer and a flow meter.

[0007] The beneficial effects of the utility model are: using two layers of insulation and using an insulation layer made of a more high-temperature resistant material, the insulation effect is good, the insulation layer has a long service life, the induction coil is not easy to be damaged, the use cost is low, the failure rate is low, the overall energy consumption is low, and the use requirements are effectively met. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic structural diagram of an embodiment. DETAILED DESCRIPTION

[0009] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0010] See also Figure 1 A horizontal high-temperature medium-frequency furnace insulation structure comprises a furnace tube 1, a plurality of crucibles 2, a first insulation layer 3, a second insulation layer 4 and an induction coil 5. The furnace tube 1 is placed horizontally and is made of high-temperature resistant graphite. The plurality of crucibles 2 are evenly spaced in the furnace tube 1. The first insulation layer 3 is wrapped around the outer wall of the furnace tube 1 and is made of refractory carbon high-temperature ceramic. The second insulation layer 4 is wrapped on the first insulation layer 3 and is made of refractory magnesia fiber mullite. The induction coil 5 is wound on the second insulation layer 4 and is connected to a water inlet pipe 51 and a water outlet pipe 52 at both ends. A two-layer insulation structure is adopted and the insulation layer material is made of a more fire-resistant and high-temperature resistant material. Even if the temperature exceeds 2000°, effective insulation can be performed, and the insulation effect is better. The insulation layer is not easy to fail or damage. At the same time, a water cooling circuit is added to the induction coil, which has a better use effect and is not easy to be damaged.

[0011] Among them, the water inlet pipe 51 is provided with a pressure gauge 53 and a first thermometer 54, and the water outlet pipe 52 is provided with a second thermometer 55 and a flow meter 56. By adding pressure gauges, thermometers, flow meters and other instruments for auxiliary monitoring, users can more intuitively understand the changes in the temperature field in the furnace tube, thereby providing an accurate reference basis for the power output of the power supply.

[0012] The beneficial effects of the utility model are: using two layers of insulation and using an insulation layer made of a more high-temperature resistant material, the insulation effect is good, the insulation layer has a long service life, the induction coil is not easy to be damaged, the use cost is low, the failure rate is low, the overall energy consumption is low, and the use requirements are effectively met.

[0013] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A horizontal high-temperature medium-frequency furnace insulation structure, characterized in that: The invention comprises a furnace tube (1), a plurality of crucibles (2), a first thermal insulation layer (3), a second thermal insulation layer (4) and an induction coil (5); the furnace tube (1) is placed horizontally and is made of high-temperature resistant graphite; the plurality of crucibles (2) are evenly spaced and arranged in the furnace tube (1); the first thermal insulation layer (3) is wrapped around the outer wall of the furnace tube (1) and is made of refractory carbon high-temperature ceramic; the second thermal insulation layer (4) is wrapped around the first thermal insulation layer (3) and is made of refractory magnesia fiber mullite; the induction coil (5) is wound around the second thermal insulation layer (4) and is respectively connected to a water inlet pipe (51) and a water outlet pipe (52) at both ends.

2. A horizontal high temperature medium frequency furnace insulation structure according to claim 1, characterized in that: The water inlet pipe (51) is provided with a pressure gauge (53) and a first thermometer (54), and the water outlet pipe (52) is provided with a second thermometer (55) and a flow meter (56).

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