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Device and method for controlling atmosphere content and pressure balance in negative pressure container

A technology of balance control and pressure, applied in the field of heat treatment, can solve the problem that the gas cannot be directly discharged, and achieve the effect of simple structure, good effect and easy operation.

Inactive Publication Date: 2009-03-18
绵阳西磁科技开发公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under positive pressure conditions, during the inflation and exhaust process, it is relatively simple to maintain the pressure balance in the container, and the gas can be discharged directly through the valve, but under negative pressure conditions, the pressure inside the container is lower than the external pressure, and the gas cannot be discharged directly, only through the vacuum pump Exhaust, because the pumping rate of the vacuum pump is constant, under the condition of changing the inflation flow, it is necessary to maintain the balance between the exhaust flow and the inflation flow to achieve a stable pressure condition, and the vacuum pump alone cannot meet the requirements.

Method used

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  • Device and method for controlling atmosphere content and pressure balance in negative pressure container

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Embodiment 1

[0021] figure 1 Among them, a control device for atmosphere composition and pressure balance in a negative pressure container, the control device includes a furnace chamber 9, an inflation valve 1, a pressure stabilizing valve 2, an automatic control proportional valve 3, a stabilizing vacuum pump 4, a valve 5, and a small vacuum pump 6. Vacuum valve 8, gas analyzer 7 and PLC controller. A pressure sensor P is arranged in the furnace chamber 9; 5. The voltage-stabilizing vacuum pump 4 and the gas analyzer 7 are connected in sequence, and the small vacuum pump 6 is connected to the gas analyzer 7; the automatic control proportional valve 3 is connected to the furnace chamber 9 and the voltage-stabilizing vacuum pump 4, and the PLC controller is respectively connected to the voltage-stabilizing valve 2, The automatic control proportional valve 3, the gas analyzer 7 and the pressure sensor P are connected. Pressure stabilizing valve 2 is a manual stabilizing valve.

[0022] In ...

Embodiment 2

[0024] A control device for atmosphere composition and pressure balance in a negative pressure container. The basic structure and control method of the device are the same as in Embodiment 1, the difference is that the pressure stabilizing valve is set as an automatic proportional valve, and the gas analyzer in the gas analyzer The data is connected to the PLC to control the intake and automatically adjust the gas composition in the furnace. The data of the gas analyzer is transmitted to the PLC, and the PLC judges the difference with the required atmosphere, and then the PLC adjusts the switch size of the automatic proportional valve to automatically adjust the atmosphere in the furnace cavity; through the data of the pressure sensor P, it is automatically controlled by the PLC Automatically control the switch size of the proportional valve to keep the pressure in the furnace chamber consistent.

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Abstract

The present invention discloses a negative pressure container interior gas composition and pressure balance control equipment and method required for making rare earth permanent magnetic material. Said invention adopts pump-valve coupled structure, utilizes gas analysis equipment and makes it be connected with PLC controller to control gas intake and gas exhaust balance so as to attain the goal of stabilizing pressure and monitoring gas composition in negative pressure container interior.

Description

technical field [0001] The invention belongs to the field of heat treatment, and in particular relates to a method for air pressure balance and atmosphere control in a negative pressure airtight container and a control device thereof, which are mainly used in vacuum induction furnaces, melting furnaces, Arc melting quick quenching furnace, continuous dynamic crystallization, continuous induction remelting quick quenching furnace and other negative pressure heat treatment processes. Background technique [0002] Due to the wide application of rapid solidification technology in the fields of amorphous and microcrystalline alloy magnetic materials. Its processing and manufacturing technology has been paid more and more attention. [0003] At present, in the design and application of rapid cooling and quenching furnaces, induction melting furnaces, dynamic crystallization furnaces, etc., there are the following problems. First, the gas pressure in the furnace chamber changes wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/02G05D16/18G05D16/20
Inventor 王永强李兆波李世贵赵淳
Owner 绵阳西磁科技开发公司
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