CN101113876A - Magnesium alloy gas-path protecting device and control method - Google Patents
Magnesium alloy gas-path protecting device and control method Download PDFInfo
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- CN101113876A CN101113876A CNA2007100594086A CN200710059408A CN101113876A CN 101113876 A CN101113876 A CN 101113876A CN A2007100594086 A CNA2007100594086 A CN A2007100594086A CN 200710059408 A CN200710059408 A CN 200710059408A CN 101113876 A CN101113876 A CN 101113876A
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Abstract
The invention relates to a gas-path protection device of a magnesium alloy quantitative melting heat preserving furnace in magnesium alloy die-casting field and a controlling method thereof. The magnesium alloy gas-path protection device of the invention consists of an N2 gas source, an SF6 gas source, a gas mixing device and an output device of magnesium alloy melting furnace equipment, wherein, the N2 gas source and the SF6 gas source adopt a double-way gas source, the output device of the magnesium alloy melting furnace equipment adopts a multi-way gas source. A filter 3, a pressure sensor 4, a pressure gauge 5, an electromagnetic valve 6 and a single-way valve 7 are sequentially arranged at the back of the N2 gas source and the SF6 gas source of the device, and a parallel-connected mass flow controller 11, a manual ball valve and a rotameter are arranged between the single-way valve 7 and the gas mixing device. The parallel-connected multi-way output device of the magnesium alloy melting furnace equipment is arranged at the back of the gas mixing device. The benefits of the invention are that: a plurality of gas resources are automatically switched, the instantaneous flow is large and the controlling precision of the mass flow controller is improved, thereby guaranteeing the mixed gas ratio of the gas; 6 output sources are available at the most, therefore, the equipment cost is saved and the management is convenient.
Description
Technical field
The present invention relates to magnesium alloy gas-path protecting device and control method, the protection gas path device and the control method of the magnesium alloy quantitative melting insulation stove in particularly a kind of magnesium alloy pressure-casting field.
Background technology
In the magnesium alloy pressure-casting field, existing magnesium alloy gas-path protecting is at the design of magnesium-alloy smelting furnace, and the protection source of the gas mainly is by SF at present
6Gas+N
2The mist of gas, SF
6Constituent content in whole mist is controlled between 0.18/1000th ~ 2.4, and the precision of its mist is directly connected to the life-span of equipment, magnesium liquid and magnesium foundry goods, works as SF
6When gas content exceeded standard, the element sulphur in the gas can cause serious corrosion to device body, influences the life-span of equipment; Work as SF
6Gas content is crossed when low, and whole protecting gas does not only reach protective effect, also can make a large amount of oxidations of magnesium liquid, thereby the magnesium slag increases, and the quality of magnesium foundry goods is produced and produced in influence.
Main at present passing through at N
2And SF
6Arrange respectively in the pipeline that mass flow controller realizes the proportioning of gas, because SF
6In whole mist constituent content less, only account for whole gas flow 0.18/1000th～2.4, SF
6Instantaneous delivery at 10～30mL/min, mass flow controller is when the control small-flow gas, its precision can be subjected to very big influence, so be difficult to guarantee the constituent content of mist, this waste that has not only caused gas brings the certain economic loss to factory, also to equipment, all harmful effect can be arranged to high temperature magnesium liquid and relevant magnesium cast product.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art; a kind of new magnesium alloy gas-path protecting device and control method are proposed; the present invention can give 3～6 magnesium-alloy smelting furnace supply of equipment protective gas simultaneously; total output flow of mist is controlled at 15～48 liters/minute (L/min) like this; the instantaneous delivery of gas is original 3～6 times, makes SF
6Instantaneous delivery rise to 30～180mL/min by 10～30mL/min, can realize the accurate proportioning of gas, improve and the quality of the quality of life-span of equipment, magnesium liquid and relevant magnesium foundry goods.
Concrete technical scheme of the present invention is as follows:
Magnesium alloy gas-path protecting device of the present invention comprises N
2Source of the gas, SF
6Source of the gas, gas mixing device and magnesium-alloy smelting furnace equipment output device, wherein N
2Source of the gas and SF
6Source of the gas adopts the two-way source of the gas, and magnesium-alloy smelting furnace equipment output device is a multichannel.
Described gas path device is at N
2Source of the gas and SF
6The source of the gas back is disposed with filter 3, pressure sensor 4, Pressure gauge 5, magnetic valve 6 and check valve 7, is provided with the mass flow controller 11 and manual ball valve and the suspended body flowmeter that are connected in parallel between check valve 7 and gas mixing device; The gas mixing device back is provided with the multichannel magnesium-alloy smelting furnace equipment output device that is connected in parallel.
Magnesium alloy gas-path protecting device of the present invention, preferred gas mixing device is 50 liters, the equipment output device is 6 the tunnel.
The control method of magnesium alloy gas-path protecting device of the present invention, total output flow of mist device is controlled at 15～48 liters/minute, SF
6Instantaneous delivery be 30～180mL/min.
The control method of magnesium alloy gas-path protecting device of the present invention adopts automatically controlled pattern and Manual Emergency Control pattern.
When there is electricity in system, manual ball valve is in closes OFF state, the whole protecting gas circuit is controlled by logic controller, by monitoring the temperature signal that each road output equipment feeds back, temperature signal is opened mass flow controller by the user preset value during greater than 300～350 degrees centigrade and is exported mutually, otherwise flow-control value that will mass flow controller is set to zero;
When pressure sensor feedback pressure value all greater than 0.3kg; Force value sensor feedback pressure value is during more than or equal to 0.2kg, and logic controller control can opens solenoid valve; At this moment, N
2N in the gas cylinder
2Gas passes through bottle self decompressor, and is docile and obedient preface and passes through filter, pressure sensor, Pressure gauge, magnetic valve, check valve, through mass flow controller flow regulated, entered gas mixing device through check valve; SF
6SF in the gas cylinder
6Gas passes through bottle self decompressor, and is docile and obedient preface through filter, pressure sensor, Pressure gauge, magnetic valve, check valve, through mass flow controller flow is regulated, is entered gas mixing device through check valve; When pressure sensor feedback pressure value during, close magnetic valve greater than 0.35kg;
A certain road or a few feedback pressure value are less than or equal to 0.3kg in pressure sensor, and logic controller control can the corresponding warning message of alarm, require the gas cylinder on a certain road of user in changing, and switch to a road of pressure abundance then.
When system does not have electricity or cuts off the power supply suddenly, mass flow controller will all be in closed condition, need this moment the user in time to open manual ball valve and suspended body flowmeter, and automatically controlled pattern is converted to the Manual Emergency Control pattern.
The invention has the beneficial effects as follows: N when electricity is arranged
2Gas cylinder two-way, SF
6The gas cylinder two-way automaticallyes switch; Gas mixing device is 50 liters of big capacity, has improved the instantaneous delivery of gas, effectively guarantees control accuracy, and assurance equipment moves in the best condition; Equipment output branch road supports 6 the tunnel at most, saves the equipment purchasing expense, is convenient to management.
Description of drawings
Fig. 1 is the implementing procedure figure of magnesium alloy gas-path protecting method for arranging of the present invention.
1, N
2Gas cylinder 2, SF
6 Gas cylinder 3, pneumatic filter 4, pressure sensor
5, Pressure gauge 6, magnetic valve 7, check valve 8, manual ball valve
9, suspended body flowmeter 10, gas mixing device 11, mass flow controller
The specific embodiment
Below in conjunction with accompanying drawing and concrete enforcement the present invention is done to describe in detail.
Magnesium alloy gas-path protecting arrangement apparatus of the present invention as shown in the figure and control method are the protection gas circuit method for arranging that is primarily aimed at many magnesium alloy quantitative melting insulation stoves.
Installation process: utilize diameter all components and parts to be docile and obedient preface according to Fig. 1 and install, at N2 source of the gas and SF for the stainless steel tube of 8mm
6The source of the gas back is disposed with filter 3, pressure sensor 4, Pressure gauge 5, magnetic valve 6 and check valve 7, is provided with the mass flow controller 11 and manual ball valve and the suspended body flowmeter that are connected in parallel between check valve 7 and gas mixing device; The gas mixing device back is provided with the multichannel magnesium-alloy smelting furnace equipment output device that is connected in parallel.Port connections all adopts two cutting ferrule seal form; The volume of 10 gas mixing devices is 50 liters.Open N2 gas cylinder 1a, N2 gas cylinder 1b, SF6 gas cylinder 2a and SF6 gas cylinder 2b then, foam Ji or water dilution liquid detergent liquid are rocked the foam that to being coated with all over all joints, if the joint has foam to be subjected to airflow influence obviously to show variation, illustrating has the gas leak phenomenon gas leak phenomenon herein, need reexamine joint replacing in time in case of necessity and tighten then.
Operational mode one, automatically controlled pattern
When there was electricity in system, manual ball valve 8 (a), 8 (b), 8 (c) 8 (d), 8 (e), 8 (f), 8 (g), 8 (h) were in and close OFF state, and the whole protecting gas circuit is controlled by logic controller (PLC).
PLC is by monitoring ' output one ', ' output two ', ' output three ', ' output four ', ' output five ', ' temperature signal that the equipment of output six ' feeds back, temperature signal is pressed the user preset value during greater than 300～350 degrees centigrade and is opened mass flow controller 11 (c) 11 (d), 11 (e), 11 (f), 11 (g), 11 (h) and export mutually, otherwise flow-control value that will mass flow controller is set to zero;
When pressure sensor 4 (a), 4 (b), 4 (c), 4 (d) feedback pressure value all greater than 0.3kg; When anti-4 (e) of force value sensor present force value more than or equal to 0.2kg, PLC meeting opens solenoid valve 4 (a), 4 (c); At this moment, N
2The N of gas cylinder 1 (a) lining
2Gas passes through bottle self decompressor, and is docile and obedient preface and passes through filter 3 (a), pressure sensor 4 (a), Pressure gauge 5 (a), magnetic valve 6 (a), check valve 7 (a), through mass flow controller 11 (a) flow regulated, entered gas mixing device 10 through check valve 7 (e); SF
6The SF of gas cylinder 2 (a) lining
6Gas is by bottle self decompressor, and be docile and obedient preface through filter 3 (c), pressure sensor 4 (c), Pressure gauge 5 (c), magnetic valve 6 (c), check valve 7 (c), through mass flow controller 11 (b) flow is regulated, entered gas mixing device 10 through check valve 7 (f); When pressure sensor 4 (e) feedback pressure value during, close magnetic valve 4 (a), 4 (c) greater than 0.35kg;
A certain road or a few feedback pressure value are less than or equal to 0.3kg in pressure sensor 4 (a), 4 (b); Or when a certain road or a few feedback pressure value were less than or equal to 0.3kg among pressure sensor 4 (c), 4 (d), the corresponding warning message of PLC meeting alarm required the user to change N
2Gas cylinder or SF
6The gas cylinder on a certain road in the gas cylinder switches to a road of pressure abundance then.
For example: pressure sensor 4 (b), 4 (d) feedback pressure value are all greater than 0.3kg; Pressure sensor 4 (a), 4 (c) feedback pressure value are less than or equal to 0.3kg; Force value sensor 4 (e) feedback pressure value is during more than or equal to 0.2kg, and PLC can the alarm user change N
2Gas cylinder 1 (a), SF
6Gas cylinder 2 (a); Opens solenoid valve 4 (b), 4 (d); At this moment, N
2The N of gas cylinder 1 (b) lining
2Gas passes through bottle self decompressor, and is docile and obedient preface and passes through filter 3 (b), pressure sensor 4 (b), Pressure gauge 5 (b), magnetic valve 6 (b), check valve 7 (b), through mass flow controller 11 (a) flow regulated, entered gas mixing device 10 through check valve 7 (e); SF
6The SF of gas cylinder 2 (b) lining
6Gas is by bottle self decompressor, and be docile and obedient preface through filter 3 (d), pressure sensor 4 (d), Pressure gauge 5 (d), magnetic valve 6 (d), check valve 7 (d), through mass flow controller 11 (b) flow is regulated, entered gas mixing device 10 through check valve 7 (f); When pressure sensor 4 (e) feedback pressure value during, close magnetic valve 4 (b), 4 (d) greater than 0.35kg.
Operational mode two, Manual Emergency Control pattern
When system does not have electricity or cuts off the power supply suddenly, mass flow controller 11 (a), 11 (b), 11 (c), 11 (d), 11 (e), 11 (f), 11 (g), 11 (h) will all be in closed condition, need this moment the user in time to open manual ball valve 8 (a), 8 (b), by regulating suspended body flowmeter 9 (a), control gas input flow rate when 9 (b) arrive, by regulating suspended body flowmeter 9 (c), 9 (d), 9 (e), 9 (f), 9 (g), control mist output flow when 9 (h) arrive, according to the corresponding manual ball valve 8 (c) of opening of equipment situation, 8 (d), 8 (e), 8 (f), 8 (g), 8 (h) switch is realized emergent air feed. operating process is identical with automatically controlled pattern with condition.
The present invention open and the magnesium alloy gas-path protecting device and the control method that propose, those skilled in the art can be by using for reference this paper content, and links such as appropriate change structure and assembly realize.Device of the present invention and control method are described by preferred embodiment, person skilled obviously can be changed or suitably change and combination equipment as herein described in not breaking away from content of the present invention, spirit and scope, realizes technology of the present invention.Special needs to be pointed out is, the replacement that all are similar and change apparent to those skilled in the artly, they are regarded as being included in spirit of the present invention, scope and the content.
Claims (6)
1. a magnesium alloy gas-path protecting device comprises N
2Source of the gas, SF
6Source of the gas, gas mixing device and magnesium-alloy smelting furnace equipment output device is characterized in that N
2Source of the gas and SF
6Source of the gas adopts the two-way source of the gas, and magnesium-alloy smelting furnace equipment output device is a multichannel.
2. magnesium alloy gas-path protecting device as claimed in claim 1 is characterized in that described gas path device is at N2 source of the gas and SF
6The source of the gas back is disposed with filter (3), pressure sensor (4), Pressure gauge (5), magnetic valve (6) and check valve (7), is provided with the mass flow controller (11) and manual ball valve and the suspended body flowmeter that are connected in parallel between check valve (7) and gas mixing device; The gas mixing device back is provided with the multichannel magnesium-alloy smelting furnace equipment output device that is connected in parallel.
3. magnesium alloy gas-path protecting device as claimed in claim 2 is characterized in that described gas mixing device is 50 liters, and the equipment output device is 6 the tunnel.
4. as the control method of claim 1,2 or 3 described magnesium alloy gas-path protecting devices, it is characterized in that total output flow of mist device is controlled at 15～48 liters/minute, SF
6Instantaneous delivery be 30～180mL/min.
5. as the control method of claim 1,2 or 3 described magnesium alloy gas-path protecting devices, it is characterized in that automatically controlled pattern is:
When there is electricity in system, manual ball valve is in closes OFF state, the whole protecting gas circuit is controlled by logic controller, by monitoring the temperature signal that each road output equipment feeds back, temperature signal is opened mass flow controller by the user preset value during greater than 300～350 degrees centigrade and is exported mutually, otherwise flow-control value that will mass flow controller is set to zero;
When pressure sensor feedback pressure value all greater than 0.3kg; Force value sensor feedback pressure value is during more than or equal to 0.2kg, and logic controller control can opens solenoid valve; At this moment, N
2N in the gas cylinder
2Gas passes through bottle self decompressor, and is docile and obedient preface and passes through filter, pressure sensor, Pressure gauge, magnetic valve, check valve, through mass flow controller flow regulated, entered gas mixing device through check valve; SF
6SF in the gas cylinder
6Gas passes through bottle self decompressor, and is docile and obedient preface through filter, pressure sensor, Pressure gauge, magnetic valve, check valve, through mass flow controller flow is regulated, is entered gas mixing device through check valve; When pressure sensor feedback pressure value during, close magnetic valve greater than 0.35kg;
When a certain road in the pressure sensor or several roads feedback pressure value were less than or equal to 0.3kg, logic controller control can the corresponding warning message of alarm, requires the user to change this road source of the gas, and meanwhile logic controller can switch to a road of pressure abundance.
6. the control method of magnesium alloy gas-path protecting device as claimed in claim 5; it is characterized in that; automatically controlled pattern is converted to the Manual Emergency Control pattern: when system does not have electricity or cuts off the power supply suddenly; mass flow controller will all be in closed condition, need this moment the user in time to open manual ball valve and suspended body flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100594086A CN101113876A (en) | 2007-08-31 | 2007-08-31 | Magnesium alloy gas-path protecting device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100594086A CN101113876A (en) | 2007-08-31 | 2007-08-31 | Magnesium alloy gas-path protecting device and control method |
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| Publication Number | Publication Date |
|---|---|
| CN101113876A true CN101113876A (en) | 2008-01-30 |
Family
ID=39022342
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100594086A Pending CN101113876A (en) | 2007-08-31 | 2007-08-31 | Magnesium alloy gas-path protecting device and control method |
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329943A (en) * | 2014-09-23 | 2015-02-04 | 北京首钢股份有限公司 | Leakage detection method for automatic cut-off valve and RH circulation air valve device |
| CN106287229A (en) * | 2016-10-21 | 2017-01-04 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of insulative gas mix body gas charging system and inflation method |
| CN106799174A (en) * | 2017-03-17 | 2017-06-06 | 南京南瑞集团公司 | A kind of SF6 and N2 gases mixing apparatus and inflation method |
| CN109931502A (en) * | 2017-12-18 | 2019-06-25 | 上海弗川自动化技术有限公司 | A kind of gas source feed system with emergency piping |
| CN111346531A (en) * | 2020-03-03 | 2020-06-30 | 国机铸锻机械有限公司 | Double-loop double-station magnesium alloy low-pressure casting gas mixing process and device thereof |
-
2007
- 2007-08-31 CN CNA2007100594086A patent/CN101113876A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329943A (en) * | 2014-09-23 | 2015-02-04 | 北京首钢股份有限公司 | Leakage detection method for automatic cut-off valve and RH circulation air valve device |
| CN104329943B (en) * | 2014-09-23 | 2016-06-29 | 北京首钢股份有限公司 | The leakage detection method of a kind of automatic stop valve and RH circulating air valve gear |
| CN106287229A (en) * | 2016-10-21 | 2017-01-04 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of insulative gas mix body gas charging system and inflation method |
| CN106287229B (en) * | 2016-10-21 | 2019-03-26 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of insulative gas mix body inflation system and inflation method |
| CN106799174A (en) * | 2017-03-17 | 2017-06-06 | 南京南瑞集团公司 | A kind of SF6 and N2 gases mixing apparatus and inflation method |
| CN109931502A (en) * | 2017-12-18 | 2019-06-25 | 上海弗川自动化技术有限公司 | A kind of gas source feed system with emergency piping |
| CN111346531A (en) * | 2020-03-03 | 2020-06-30 | 国机铸锻机械有限公司 | Double-loop double-station magnesium alloy low-pressure casting gas mixing process and device thereof |
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