Protective gas charging device and protective gas charging method for elevator furnace

A technology of protective gas and inflatable device, which is applied in bell-type furnaces, furnace control devices, furnaces, etc., can solve the problems that mechanical barometers cannot meet the requirements of pressure control, and electronic pressure gauges cannot be used, so as to avoid the accuracy of pressure control Insufficient effect

Pending Publication Date: 2021-09-03
莱芜成威电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a bell furnace for the problem that the furnace needs to be filled with protective gas when there is a power failure during the sintering process of the soft magnetic core, but the electronic pressure gauge cannot be used, and at the same time, the mechanical pressure gauge alone cannot meet the pressure control requirements. Protective gas charging device and protective gas charging method for bell furnace

Method used

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  • Protective gas charging device and protective gas charging method for elevator furnace
  • Protective gas charging device and protective gas charging method for elevator furnace
  • Protective gas charging device and protective gas charging method for elevator furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like figure 2 and 5As shown, the U-shaped tube 3 is made of a transparent material, the lower part of the two branches of the U-shaped tube 3 is marked with a zero scale line 31 , and the upper part of the branch tube of the U-shaped tube 3 directly connected with the external atmosphere is marked with an upper limit value scale line 33 .

[0050] When the liquid level in the branch pipe where the U-shaped pipe 3 directly communicates with the connecting pipeline 6 reaches the zero scale line 31 , the liquid level in the branch pipe where the U-shaped pipe 3 directly communicates with the external atmosphere reaches the upper limit scale line 33 .

[0051] U-shaped pipe 3 is transparent plexiglass.

[0052] One end of the exhaust pipeline 5 is installed on the top of the bell furnace 1 and communicates with the inside of the bell furnace 1 .

[0053] like figure 1 and 2 As shown, a support 4 is installed below the U-shaped pipe 3 .

[0054] A bell furnace protecti...

Embodiment 2

[0062] The difference between this embodiment and Embodiment 1 is that the U-shaped tube 3 is a steel pipe, and by putting a certain amount of water in the U-shaped tube, it can be realized that when the pressure of the protective gas in the bell furnace 1 reaches the process specification, the U-shaped tube 3 The liquid level in the branch pipe directly connected with the atmosphere reaches the upper end of the branch pipe, that is, when the liquid level in the branch pipe directly connected with the U-shaped pipe 3 and the connecting pipeline 6 reaches the zero scale line 31, the branch pipe directly connected with the external atmosphere by the U-shaped pipe 3 The liquid level reaches the upper surface.

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Abstract

The invention belongs to sintering production of elevator furnaces, and particularly relates to a protective gas charging device and protective gas charging method for an elevator furnace. The charging device comprises a protective gas charging pipeline (2), a mechanical barometer (7), a U-shaped pipe (3), an exhaust pipeline (5) and a connecting pipeline (6). Compared with the prior art, the protective gas charging device and the protective gas charging method have the advantages and positive effects that (1) under the condition that an electronic pressure gauge cannot be used in case of a power failure in the sintering process of a soft magnetic core, the protective gas charging device for the elevator furnace can be used for charging protective gas with specified pressure into the elevator furnace; and (2) the mechanical barometer is combined with the U-shaped pipe, so that a manual valve II connected with the connecting pipeline is prevented from being opened (water in the U-shaped pipe is prevented from entering the furnace) when the pressure in the furnace is negative pressure, and the situation that the pressure of the protective gas in the furnace does not meet the process requirement due to insufficient pressure control precision of the mechanical barometer can be avoided.

Description

technical field [0001] The invention belongs to the sintering production of a bell furnace, in particular to a bell furnace protective gas charging device and a bell furnace protective gas charging method. Background technique [0002] The soft magnetic core sintering production process generally needs to go through the heating stage, holding stage and cooling stage. In the cooling stage, nitrogen is always filled to maintain the sintering furnace; but in the heating and holding stages, when the required sintering atmosphere is an oxidizing atmosphere (high oxygen Partial pressure atmosphere) to feed oxygen into the furnace, when the required sintering atmosphere is a reducing atmosphere, feed nitrogen into the furnace or vacuumize, the vacuum degree should not be too high when vacuuming, if the vacuum degree is too high, it will easily ionize the air , causing the silicon carbide rods to be ignited and burned out. [0003] Therefore, if there is a power failure during the ...

Claims

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Application Information

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IPC IPC(8): F27B11/00F27D7/02F27D7/06F27D19/00
CPCF27B11/00F27D7/02F27D7/06F27D19/00F27D2007/023F27D2007/063F27D2019/0068F27D2019/0009
Inventor南凯亮
Owner莱芜成威电子材料有限公司