SU990451A1 - Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process - Google Patents

Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process Download PDF

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Publication number
SU990451A1
SU990451A1 SU813286082A SU3286082A SU990451A1 SU 990451 A1 SU990451 A1 SU 990451A1 SU 813286082 A SU813286082 A SU 813286082A SU 3286082 A SU3286082 A SU 3286082A SU 990451 A1 SU990451 A1 SU 990451A1
Authority
SU
USSR - Soviet Union
Prior art keywords
oxygen
cutting
pressure
reducer
valve
Prior art date
Application number
SU813286082A
Other languages
Russian (ru)
Inventor
Марк Мойсеевич Лилько
Василий Кириллович Мармусевич
Original Assignee
Научно-Исследовательский Институт Технологии Криогенного Машиностроения
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Научно-Исследовательский Институт Технологии Криогенного Машиностроения filed Critical Научно-Исследовательский Институт Технологии Криогенного Машиностроения
Priority to SU813286082A priority Critical patent/SU990451A1/en
Application granted granted Critical
Publication of SU990451A1 publication Critical patent/SU990451A1/en

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Description

R
The invention relates to gas cutting machines, in particular, devices for controlling the pressure of the cutting oxygen flowing out of the mouthpiece. At the beginning of the cutting process, when cutting into the sheet and punching holes, as well as blowing through the cutting line, and can be used in the metal industry
A device for regulating the oxygen pressure of the oxygen is known, which contains a pneumatic control reducer. a normally closed solenoid valve is installed, an adjustable choke, a receiver equipped with a normally open relief solenoid valve connected to the ATM sphere 1.
In this device, in the process of heating the metal, when the cutting oxygen is turned off, it is possible to fill the cutting oxygen main through the nozzle of the cutter, which preheats the gas-oxygen mixture, which burns there, causing the charring of the hoses. After starting up the oxygen oxygen section, the charred, heated hoses will ignite and become unusable.
It is also known a device for regulating the pressure of cutting oxygen in gas-oxygen cutting, comprising a gas supply line and a purge reducer with a normally closed solenoid valve installed on the gas supply line along the gas supply with a starter reducer with a normally closed solenoid valve, adjustable a choke, a receiver with a normally open electro-magnetic valve connecting the receiver with the atmosphere, and a pneumatic-controlled gearbox, whose submembrane chamber is connected to the low pressure chamber of the starter gearbox.
° The said device enables switching of the supply of cutting oxygen under low pressure to purge the main line of cutting oxygen during the combustion of the heating flame 2.
A disadvantage of the known device is that when cutting off the supply of cutting oxygen, when the pressure relief valve from the receiver opens and the valve of the starting reduction gear closes, if the oxygen-oxygen mixture of the heating flame continues to burn, some of the oxygen from the submembrane chamber is released through the open discharge valve the receiver, which leads to unstable purge pressure and creates the possibility of a back shock on the line of cutting oxygen.
In other words, the disadvantage of the device is the lack of security due to the unstable pressure of the blowdown and the possibility of this backfire.
The purpose of the invention is to increase safety by providing a steady blowing pressure and thereby eliminating the possibility of a backfire.
This goal is achieved by the fact that in a device containing a gas supply line and a purge reducer installed in this highway with a normally closed electromagnetic valve and also installed in the gas supply line along the gas supply a starting reducer with a normally closed solenoid valve, an adjustable throttle receiver a normally open solenoid valve connecting the receiver to the atmosphere, and a pneumatic controlled gearbox, the submembrane chamber of which is connected to the chamber of low The pressure of the starter gearbox, the purge reducer and the solenoid valve connected to it are installed parallel to the pneumatically controlled gearbox, and the low pressure chamber of the purge reducer is connected to the low pressure chamber of the pressure reducer through the solenoid valve.
The drawing shows a diagram of the proposed device.
The device consists of a gearbox 1 s. pneumatically controlled, the high-pressure chamber of which is connected to the gas supply line 2. The high-pressure chamber of the starting gearbox 3 and the blowdown gearbox 4 are connected to the same line. The low pressure chamber of the starting gearbox 3 through a normally closed solenoid valve 5, an adjustable choke 6, which represents the valve is continuously adjustable, and the receiver 7 is connected to the submembrane chamber of the reducer 1. The low pressure chamber of the reducer of the purge 4 through a normally closed electromagnetic valve en 9 is connected to the low pressure chamber reducer 1. The receiver 7 is in communication with the atmosphere through the normally open solenoid relief valve 8.
The device works as follows.
Gear 3 sets the required working pressure of the cutting oxygen, gear 4 sets the required purge pressure (Рттрод 0,3-0,5 -§- |), and throttle b - the rise time of the cutting oxygen. At the same time with the start-up of a combustible gas (heating flame), valve 9 opens and oxygen under pressure Pprod enters the low pressure chamber of the reducer 1. Continuous purging of the cutting oxygen line occurs, which prevents the oxygen-oxygen mixture from entering the specified line. At the same time part of the oxygen flows
Through the nozzle in the gearbox 1, connecting the low-pressure chamber and the pneumatic-controlled sub-diaphragm chamber of the reducer, and through the open valve it is vented to the atmosphere.
At the end of the metal warming up, the valve 8 closes and the valve 5 opens, i.e. There is a gradual increase in pressure in the submembrane chamber of the reducer 1 from the etching pressure to a predetermined pressure, and therefore, the working pressure in the low pressure chamber of the reducer. As the pressure in the low pressure chamber of the pressure reducer 1 increases, the pressure reducer 4 closes, as the pressure differential, on which the settings of the pressure reducer 4, decreases. For cutting off sharply the cutting oxygen
0, the valve 5 closes and the valve 8 opens, i.e. the pressure in the receiver and the submembrane chamber drops sharply and the gear 1 closes. As soon as the pressure of the cutting oxygen drops, the reducer 4 will open again and the purge line of the cutting oxygen will begin to blow until the heating flame burns. Simultaneously with its shutdown, the solenoid valve 9 will close.
0 The invention allows eliminating the return blows along the cutting oxygen line, increasing the reliability of the gas supply system of the machine as a whole, as well as providing improved safety conditions.

Claims (2)

1. USSR author's certificate No. 545432, cl. At 23 K 7/10, 07.07.75.
2. USSR author's certificate in application number 3211776, cl. At 23 K 7/10, 05.12.80 (prototype).
Oz
SU813286082A 1981-05-13 1981-05-13 Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process SU990451A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU813286082A SU990451A1 (en) 1981-05-13 1981-05-13 Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU813286082A SU990451A1 (en) 1981-05-13 1981-05-13 Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process

Publications (1)

Publication Number Publication Date
SU990451A1 true SU990451A1 (en) 1983-01-23

Family

ID=20957212

Family Applications (1)

Application Number Title Priority Date Filing Date
SU813286082A SU990451A1 (en) 1981-05-13 1981-05-13 Apparatus for controlling pressure of cutting oxygen at gas-oxygen cutting process

Country Status (1)

Country Link
SU (1) SU990451A1 (en)

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