CN105665680B - A kind of differential pressure stove and control method - Google Patents
A kind of differential pressure stove and control method Download PDFInfo
- Publication number
- CN105665680B CN105665680B CN201610208821.3A CN201610208821A CN105665680B CN 105665680 B CN105665680 B CN 105665680B CN 201610208821 A CN201610208821 A CN 201610208821A CN 105665680 B CN105665680 B CN 105665680B
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- Prior art keywords
- tank body
- pipeline
- differential pressure
- lower tank
- upper tank
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- 238000000034 method Methods 0.000 title abstract description 26
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 abstract description 18
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011067 equilibration Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Abstract
The present invention relates to counter-pressure casting field, more particularly to a kind of differential pressure stove and control method.Include tank body, upper tank body and lower tank are included in tank body, between upper tank body and lower tank a gathering tube is connected each via pipeline, pressure-reducing valve is included on gathering tube, drier is also included on the gathering tube, differential pressure stove also includes separator, and the separator pipeline is connected to air accumulator, and air accumulator pipeline is connected to air compressor machine；The upper tank body and lower tank each connect vacuum machine, and the upper tank body also connects offgas outlet pipe by pipeline with lower tank, supporting leg is included below the tank body.Beneficial effect：It using constituted above, can be inflated by air accumulator and air compressor machine cooperation into tank body, and squeeze into upper tank body and lower tank the gas of different pressures, there is provided the basic structure of differential pressure reaction, realization are automatically controlled and monitored.
Description
Technical field
The present invention relates to counter-pressure casting field, more particularly to a kind of differential pressure stove and control method.
Background technology
Counter-pressure casting is also known as Counter pressure casting, pressure difference casting.It is a kind of casting derived from the basis of low pressure casting
Make method.Difference with low pressure casting is in casting mold outer cover seal closure, inside fills compressed gas, casting mold is in the one of gas
Under constant-pressure.During liquid metal filling, the pressure of gas in holding furnace is set to be more than the pressure of gas in casting mold, during such as low pressure casting
That realizes molten metal like that fills type, pressurize and supercharging.But now casting is the crystallization and freezing under higher pressure effect, so
It can ensure to obtain the higher casting of consistency.It is the combination that two kinds of casting methods are crystallized under low pressure casting and pressure.Holding furnace
The scheme obtained on metal bath surface with casting mold internal pressure differences has two kinds：
1st, supercharge method
First it is passed through the gas of same pressure simultaneously into seal closure and holding furnace, makes pressure balance between them.Then protect
The gas pressure value in seal closure is held, is progressively passed through the bigger gas of pressure on metal bath surface into holding furnace, creates tank up and down
Pressure differential, so as to which that realizes molten metal fills type and pressurize.
2nd, method is depressurized
First it is passed through the gas of same pressure simultaneously into seal closure and holding furnace, after equilibration had been achieved, progressively puts and seal
Compressed gas in cover, it is that pressure gradually reduces, that realizes molten metal fills type and pressurize.
The defects of prior art, is：
Automatically control inconvenience；Inconvenient maintenance；Tank body installation receives various place limitations.
The content of the invention
The purpose of invention：In order to provide a kind of more preferable resistance furnace of effect and control method, specific purposes are shown in specific reality
Apply multiple substantial technological effects of part.
In order to reach as above purpose, the present invention adopts the following technical scheme that：
Scheme one：
A kind of differential pressure stove, it is characterised in that comprising tank body, upper tank body and lower tank, upper tank body and lower tank are included in tank body
A gathering tube is connected each via pipeline between body, pressure-reducing valve is included on gathering tube, drier is also included on the gathering tube,
Drier avris pipeline connects separator, and the separator pipeline is connected to air accumulator, and air accumulator pipeline is connected to air compressor machine；Institute
State upper tank body and lower tank each connects vacuum machine, the upper tank body also connects offgas outlet pipe, institute with lower tank by pipeline
State and include supporting leg below tank body.
Further technical scheme of the invention is that the supporting leg is hollow, comprising door is opened on supporting leg, opens and is included in door
Maintenance tool.
Further technical scheme of the invention is, also includes the temperature sensor being arranged in upper tank body and lower tank and pressure
Force snesor；Each include temperature sensor and pressure sensor in upper tank body and lower tank.
Further technical scheme of the invention is that the supporting leg is connected through a screw thread between including more than one section, each section.
Further technical scheme of the invention is that described each section includes a shirt rim, and multiple holes are included on shirt rim, multiple
Kong Zhongneng inserts bolt.
Scheme two：
A kind of control method of differential pressure stove, it is characterised in that using the as above resistance furnace described in any one, comprising such as
Lower step：
Preset project before control：Pre-set the full gaseities of the MPa of reservoir pressure 2.0, the full gaseity of air compressor machine；
Valve is opened, vacuum pump work, electric furnace upper tank body and lower tank enter predetermined vacuum state value 0.09MPa；
The magnetic valve closed on vacuum line, lower air inlet motor-driven valve are opened, and lower tank pressure reaches setting value, upper tank body pressure
Power reaches setting value, and upper air motor-driven valve is opened and then causes upper tank body air inlet, and upper exhaust motor-driven valve opens exhaust, enterprising air pressure
Force snesor monitoring state, continuous firing 45 minutes, lower tank magnetic valve superpressure automatic protection and pressure release voltage stabilizing, lower exhaust are automatic
It is vented and then pressure release finishes.
Using the present invention of as above technical scheme, had the advantages that relative to prior art：Using constituted above, lead to
Crossing air accumulator and air compressor machine cooperation can inflate into tank body, and squeeze into upper tank body and lower tank the gas of different pressures,
The basic structure of differential pressure reaction is provided, realization is automatically controlled and monitored.
Brief description of the drawings
In order to further illustrate the present invention, it is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is inventive structure schematic diagram；
Fig. 2 is the structural representation of vacuumized part；
1. vacuum machine；2. transmitter one；3. transmitter two；4. tank body；5. upper tank body；6. lower tank；7. transmitter three；8.
Offgas outlet pipe；9. pressure-reducing valve；10. drier；11. air accumulator；12. air compressor machine.
Embodiment
Embodiments of the invention are illustrated below in conjunction with the accompanying drawings, embodiment is not construed as limiting the invention：
A kind of differential pressure stove, it is characterised in that comprising tank body, upper tank body and lower tank, upper tank body and lower tank are included in tank body
A gathering tube is connected each via pipeline between body, pressure-reducing valve is included on gathering tube, drier is also included on the gathering tube,
Drier avris pipeline connects separator, and the separator pipeline is connected to air accumulator, and air accumulator pipeline is connected to air compressor machine；Institute
State upper tank body and lower tank each connects vacuum machine, the upper tank body also connects offgas outlet pipe, institute with lower tank by pipeline
State and include supporting leg below tank body.The substantive technique effect and its implementation process that the technical scheme at this place is played are as follows：Adopt
With constituted above, can be inflated by air accumulator and air compressor machine cooperation into tank body, and upper tank body and lower tank are squeezed into not
With the gas of pressure, there is provided the basic structure of differential pressure reaction.
The supporting leg is hollow, comprising door is opened on supporting leg, opens in door and includes maintenance tool.The technical scheme institute at this place
The substantive technique effect and its implementation process played is as follows：Leg structure originally is only supporting role, therefore is repaired
Instrument need every time when overhauled will band come in, using this structure, maintaining structure can be directly placed at supporting leg
In, therefore can conveniently place maintenance tool.
Also include the temperature sensor and pressure sensor being arranged in upper tank body and lower tank；In upper tank body and lower tank
Each include temperature sensor and pressure sensor.Substantive technique effect that the technical scheme at this place is played and in fact
Existing process is as follows：This patent can realize high level automatically control and on-site supervision, such as can use match somebody with somebody as follows
Put：Three resistance furnaces of system are often covered, every resistance furnace gathers two temperature, amounts to 36 collection points position, temperature acquisition is by corundum
Temperature becomes collection to plc data cabinet, converted communication and monitored to Master Control Room computer.Unified cloth shielding line is routed in crane span structure.It is logical
News are changed to master control by 485 communications+router.
The supporting leg is connected through a screw thread between including more than one section, each section.The essence that the technical scheme at this place is played
Technique effect and its implementation process be as follows：It is connected through a screw thread between each section, further such that the length of supporting leg can be adjusted
It is whole, when the supporting leg of long length is needed, each thread segment of supporting leg can be connected so that overall height compared with
It is high.When the supporting leg of relatively low length is needed, a part of supporting leg can be unloaded down so that the length of overall supporting leg being capable of phase
To reducing.
Described each section includes a shirt rim, and multiple holes are included on shirt rim, and multiple Kong Zhongneng insert bolt.The technology at this place
The substantive technique effect and its implementation process that scheme is played are as follows：Shirt rim can conveniently install each section of supporting leg, and then make
Obtain the supporting leg of overall tank body can conveniently install under each length.
Scheme two：
A kind of control method of differential pressure stove, it is characterised in that using the as above resistance furnace described in any one, comprising such as
Lower step：
Preset project before control：Pre-set the full gaseities of the MPa of reservoir pressure 2.0, the full gaseity of air compressor machine；
Valve is opened, vacuum pump work, electric furnace upper tank body and lower tank enter predetermined vacuum state value 0.09MPa；
The magnetic valve closed on vacuum line, lower air inlet motor-driven valve are opened, and lower tank pressure reaches setting value, upper tank body pressure
Power reaches setting value, and upper air motor-driven valve is opened and then causes upper tank body air inlet, and upper exhaust motor-driven valve opens exhaust, enterprising air pressure
Force snesor monitoring state, continuous firing 45 minutes, lower tank magnetic valve superpressure automatic protection and pressure release voltage stabilizing, lower exhaust are automatic
It is vented and then pressure release finishes.
More specifically：
1st, preset project before controlling：The full gaseities of the MPa of 10M3 reservoir pressures 2.0, the full gaseity of air compressor machine, pressure-reducing valve
Adjust to preset value, electric furnace controllable silicon PID regulations and be warming up to preset temperature constant temperature, HMI system automatic control state, at industrial computer
In monitor state, upper exhaust automatically controls valve group preset state.
2nd, working condition technological process：HMI system automatic control state up and down open by air inlet bypass valve --- vavuum pump work
Make --- upper lower tank enters predetermined vacuum state value -0.09MPa in electric furnace（Vacuum pressure sensor controls, test point position
1）- lower tank pressure reaches setting value with ----close vacuum line magnetic valve --- lower air inlet motor-driven valve is opened ---（Pressure inverting
Device monitors 1.5MPa, test point position 2）--- upper tank body pressure reaches setting value, and (1.2MPa pressure transmitters monitor 1.2MPa, inspection
Measuring point, 3) --- bypass closed electromagnetic valve（Test point position 4）--- upper air motor-driven valve opening --- upper tank body air inlet（Pressure is kept
Constant pressure 1.2MPa, test point position 2 provide feedback）--- above it is vented motor-driven valve and opens exhaust（Test point position 5, the exhaust of magnetic valve branch
6 test point positions, test point position 7）----upper air pressure sensor monitoring state --- upper air motor-driven valve adjustment state ---
HMI system automatic control state --- continuous firing 45 minutes ----lower tank magnetic valve superpressure automatic protection and pressure release voltage stabilizing（Inspection
Measuring point position 8）--- technique terminates lower exhaust automatic exhaust --- pressure release finishes ---.
As it is further preferably, using modern control technologies such as programmable controller, intelligent control instruments, to casting machine
Whole production process carries out automation whole-process control, and concentrated collection, computing and control are carried out to related pressure, flow and temperature
System, the language ability and graph ability enriched using HMI, works out corresponding software collecting, setting and showing in technical process
Real-time process parameter and corresponding parameter curve, automatically controlled and with all data of industry control machine monitoring, and stored each by PLC
Production technology parameters, it is equipped with printer and goes out figure output inquiry archive, in favor of the raising of product quality and product stability.
In a creative way, each effect of the above is individually present, moreover it is possible to the combination of the above results is completed with a nested structure.
It is clear that the technique effect that above structure is realized is realized, discounting for additional technical scheme, this patent title is also
It can be a kind of differential pressure stove.Part details not shown in figure.
It should be noted that multiple schemes that this patent provides include the basic scheme of itself, independently of each other, not mutually
Restrict, but it can also be mutually combined in the case where not conflicting, and reach multiple effects and realize jointly.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of this area
Personnel should be recognized that the present invention is not limited to the above embodiments, simply illustrate this hair described in above-described embodiment and specification
Bright principle, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Both fallen within improving in claimed scope.
Claims (5)
1. a kind of differential pressure stove, it is characterised in that comprising tank body, upper tank body and lower tank, upper tank body and lower tank are included in tank body
Between each via pipeline connect a gathering tube, include pressure-reducing valve on gathering tube, drier also included on the gathering tube, it is dry
Dry device avris pipeline connects separator, and the separator pipeline is connected to air accumulator, and air accumulator pipeline is connected to air compressor machine；It is described
Upper tank body and lower tank each connect vacuum machine, and the upper tank body also connects offgas outlet pipe with lower tank by pipeline, described
Supporting leg is included below tank body.
2. a kind of differential pressure stove as claimed in claim 1, it is characterised in that the supporting leg is hollow, and unlatching is included on supporting leg
Door, open in door and include maintenance tool.
3. a kind of differential pressure stove as claimed in claim 1, it is characterised in that also include and be arranged in upper tank body and lower tank
Temperature sensor and pressure sensor；Each include temperature sensor and pressure sensor in upper tank body and lower tank.
4. a kind of differential pressure stove as claimed in claim 1, it is characterised in that the supporting leg leads between including more than one section, each section
Cross threaded connection.
5. a kind of differential pressure stove as claimed in claim 4, it is characterised in that described each section includes a shirt rim, is wrapped on shirt rim
Containing multiple holes, multiple Kong Zhongneng insert bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208821.3A CN105665680B (en) | 2016-04-06 | 2016-04-06 | A kind of differential pressure stove and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208821.3A CN105665680B (en) | 2016-04-06 | 2016-04-06 | A kind of differential pressure stove and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105665680A CN105665680A (en) | 2016-06-15 |
| CN105665680B true CN105665680B (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610208821.3A Expired - Fee Related CN105665680B (en) | 2016-04-06 | 2016-04-06 | A kind of differential pressure stove and control method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109570481B (en) * | 2018-03-01 | 2021-01-01 | 北京航大新材科技有限公司 | Pneumatic melt conveying bag system and melt conveying method |
| CN108453242B (en) * | 2018-05-14 | 2021-06-08 | 沈阳理工大学 | Self-learning-based low-pressure casting pressurization control method and device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3113948B2 (en) * | 1992-02-17 | 2000-12-04 | 株式会社五十鈴製作所 | Multifunctional casting equipment |
| JPH11300464A (en) * | 1998-04-21 | 1999-11-02 | Sintokogio Ltd | Low-pressure casting method and holding furnace device for low-pressure casting |
| CN101168189A (en) * | 2007-11-28 | 2008-04-30 | 李泽奇 | Vacuum differential pressure pressurization casting method and device |
| CN201684915U (en) * | 2010-03-19 | 2010-12-29 | 上海皮尔博格有色零部件有限公司 | Low pressure casting machine and liquid surface pressurization control system thereof |
| CN102784902B (en) * | 2012-06-21 | 2014-09-10 | 西安航空动力控制科技有限公司 | Metal mold pressure regulating casting device |
| CN102717051A (en) * | 2012-06-28 | 2012-10-10 | 上海交通大学 | Pressure adjusting precision casting device of high temperature alloy complex thin wall casts |
| CN203917866U (en) * | 2014-01-15 | 2014-11-05 | 哈尔滨东安发动机（集团）有限公司 | Multifunctional reverse gravitational casting physical simulating device |
| CN205464278U (en) * | 2016-04-06 | 2016-08-17 | 杨卫东 | Resistance furnace |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180123 Address after: 710000 Shaanxi province Xi'an Beilin District torch Road No. 7 Unit 1 Building 1 room 10620 Applicant after: XI'AN XINJIUDA CONSTRUCTION ENGINEERING CO.,LTD. Address before: Chongyi town Qinyang City, Henan province 454582 city of Jiaozuo before Tang Village No. 32 Applicant before: Yang Weidong |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180309 |