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CO2 supplying apparatus

A technology for equipment and gas supply pipelines, applied in the field of gas flow control devices, can solve problems such as the inability to implement automatic control of flow and temperature, and achieve the effects of saving water glass binder, saving CO2 gas, and improving core strength

Inactive Publication Date: 2002-08-07
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system cannot implement automatic control of flow and temperature.

Method used

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  • CO2 supplying apparatus
  • CO2 supplying apparatus
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Embodiment Construction

[0012] Combined with the accompanying drawings, figure 1 CO in cylinder 1 2 After the gas is decompressed through the bottle pressure reducing valve 2 and the pressure reducing valve 3, the air pressure is relatively stable, and the front solenoid valve 4 and the solenoid valve 13 are switched on and off according to the set time under the control of the PLC programmable controller 11 , to obtain the blowing time of continuous blowing or the pulse interval of pulse blowing and the total blowing time. The gas coming out of the pre-electromagnetic valve 4 enters the flow sensor 10 through the throttle valve 7, and drives the small magnetic piece 5 on the rotating blade 9 to rotate, and the Hall element 8 gives a magnetic signal through the small magnetic piece 5 of the rotating blade 9, which is determined by The PLC programmable controller 11 records the pulse interval between each magnetic signal and converts it into a flow value. The flow rate is compared with the set flow ...

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Abstract

The CO2 gas supply equipment for casting water glass mold hardened by gassing CO2 is aimed at accurately controlling gas supply time, gas supply pressure, flow rate and gas temperature to implement continuous gassing, pulse gassing and heating gassing of CO2 gas. The gas supply pipeline connected with gas source is equipped with pressure release valve, flow regulating valve, flow rate sensor, electromagnetic valve, heating device and output gas pipe, and the gas outlet is equipped with temp. sensor. Its automatic control circuit is electrically connected with electromagnetic valve for controlling its opening and closing time, and the flow rate sensor is electrically connected with stepper motor by means of automatic control circuit to form flow control loop to control flow regulating valve, and the temp. sensor and automatic contral circuit, temp. regulator and heating device can be formed into temp. control loop.

Description

technical field [0001] The invention belongs to gas flow control devices, in particular to CO 2 Air supply control for blow hardened casting water glass molds. Background technique [0002] CO 2 Water glass chilled mold (core) is one of the commonly used molding and core-making processes in foundry production. This process has low raw material prices, less pollution, and easy process operation. It is widely used in foundry production in my country. But there are still some key technical problems, such as the control of air supply flow, time and pressure, which have not been well resolved. In the actual operation of the factory, manual operation is mostly used, and CO is controlled by experience. 2 hardening of the gas. Many factories rely on "overblowing" and increasing the amount of water glass added to ensure the timely strength and storage strength necessary for operation. This not only increases the consumption of raw materials, but also increases the residual streng...

Claims

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Application Information

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IPC IPC(8): B22C9/12
Inventor 董选普魏青松黄乃瑜熊自力樊自田
Owner HUAZHONG UNIV OF SCI & TECH