CN115401185A - Explosion-proof vacuum suction casting system filled with compressed air and working method thereof - Google Patents
Explosion-proof vacuum suction casting system filled with compressed air and working method thereof Download PDFInfo
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- CN115401185A CN115401185A CN202110582244.5A CN202110582244A CN115401185A CN 115401185 A CN115401185 A CN 115401185A CN 202110582244 A CN202110582244 A CN 202110582244A CN 115401185 A CN115401185 A CN 115401185A
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- 238000005266 casting Methods 0.000 title claims abstract description 206
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims description 24
- 238000004321 preservation Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 2
- 238000010790 dilution Methods 0.000 abstract description 4
- 239000012895 dilution Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 52
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 23
- 229910000831 Steel Inorganic materials 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
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- 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
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/006—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using reactive gases
Abstract
The invention belongs to the technical field of explosion-proof devices, and particularly relates to a compressed air-filled explosion-proof vacuum suction casting system and a working method thereof. The invention relates to an explosion-proof vacuum suction casting system charged with compressed air, which comprises: a suction casting chamber; the holding furnace is arranged on one side of the suction casting chamber; the casting mould is arranged in the suction casting chamber; the liquid lifting pipe is arranged in the suction casting chamber; the negative pressure pipe is connected with the suction casting chamber; the gas-filled pipe is connected with the suction casting chamber; the exhaust pipe is connected with the suction casting chamber. The invention relates to an explosion-proof vacuum suction casting system filled with compressed air and a working method thereof.A vacuum state is established in a suction casting chamber during suction casting work through a negative pressure pipe; after the suction casting and pressure maintaining are finished, compressed air is blown into the suction casting chamber through the air charging pipe to mix and dilute combustible gas; the suction casting chamber is communicated with the atmosphere through an exhaust pipe, and the atmospheric pressure of the suction casting chamber is recovered; meanwhile, combustible gas after mixing and dilution is discharged outwards through the exhaust pipe, so that the combustible gas is effectively prevented from being ignited and exploding when contacting with the high-temperature surface of the liquid lifting pipe when the casting mould is taken out, and safety accidents are avoided.
Description
Technical Field
The invention belongs to the technical field of explosion-proof devices, and particularly relates to a compressed air-filled explosion-proof vacuum suction casting system and a working method thereof.
Background
The vacuum suction casting process is to set the casting mold in a sealed suction casting chamber with the lower riser pipe immersed in liquid metal, and to vacuumize the suction casting chamber to make the metal liquid fill the casting mold from bottom to top under negative pressure and to solidify and cool under negative pressure. Releasing pressure to recover atmospheric pressure after the pressure maintaining solidification is finished, and enabling molten metal in the ceramic lift tube to flow back to the heat preservation furnace.
The vacuum suction casting process is adopted to produce the automobile turbocharger product made of heat-resistant steel, the metal alloy smelting and pouring temperature is high, and the temperature of the suction casting molten steel is generally controlled to be about 1550 ℃. The structure of a heat-resistant steel product such as a turbine shell is complex, the heat-resistant steel product is of a three-dimensional curved streamline structure, the mass is only thousands of grams, the main wall thickness of the turbine shell is 4-5 mm, the thickness of the wall thickness is uneven, the casting quality requirement is extremely high, and any casting defect is not allowed; the heat-resistant steel has large solidification shrinkage, poor molten steel fluidity and poor casting process performance, and castings are easy to generate casting defects such as air holes, slag inclusion, shrinkage cavity, shrinkage porosity and the like. Therefore, the heat-resistant steel turbine shell is relatively complex in casting process design.
The shell mold casting molding core of the heat-resistant steel turbine shell is made of a precoated sand hot core and a precoated sand cold core and is formed by assembling two upper and lower shells and a plurality of sand cores, wherein the shells are made of a precoated sand shell forming machine, and the inner cavity sand core is made of a high-strength precoated sand shell core. The general heat-resistant steel volute is designed into one die with four pieces, the maximum outer contour size is 750mm × 650mm × 400mm, and the weight of the whole box-assembling shell mold is about 100 Kg. The gas evolution of the high-strength precoated sand is detected to be 17ml/g.
Because the suction casting mold has heavy weight, the precoated sand has large gas evolution amount and high gas evolution speed, and a large amount of combustible gas can be generated in the suction casting process. After the suction casting is finished, when the sand core is taken away by a robot, the temperature of the residual molten steel on the contact surface of the casting mold and the riser tube is higher, combustible gas can be ignited, and severe oxidation reaction is generated, so that the gas is instantaneously expanded to generate explosion reaction, and personal safety accidents and equipment safety accidents are caused.
In order to solve the problem, the invention provides a nitrogen-filled explosion-proof device of a vacuum suction casting chamber before my department, but nitrogen is used as inert gas to prevent oxidation reaction, and a nitrogen cylinder needs to be replaced frequently or nitrogen-generating equipment is used, so the use cost is high.
Disclosure of Invention
The invention aims to provide a compressed air-filled explosion-proof vacuum suction casting system and a working method thereof, and aims to solve the technical problem that the explosion-proof use cost of the conventional vacuum suction casting chamber explosion-proof device is high due to the adoption of a nitrogen-filled mode.
In order to solve the above technical problem, the present invention provides a compressed air-filled explosion-proof vacuum suction casting system, comprising: the suction casting chamber can be opened and closed; the heat preservation furnace is arranged on one side of the suction casting chamber and used for containing molten metal; the casting die is arranged in the suction casting chamber to prepare molten metal into a suction casting blank; the liquid lifting pipe is arranged in the suction casting chamber, one end of the liquid lifting pipe is arranged in the casting mold, and the other end of the liquid lifting pipe penetrates out of the suction casting chamber and is immersed in the molten metal of the holding furnace; the negative pressure pipe is connected with the suction casting chamber and is suitable for enabling the suction casting chamber to form a negative pressure environment; the gas filling pipe is connected with the suction casting chamber and is suitable for filling compressed air into the suction casting chamber so as to dilute combustible gas in the suction casting chamber; and the exhaust pipe is connected with the suction casting chamber and is suitable for exhausting gas in the suction casting chamber.
Further, the air inlet end of the air charging pipe is connected with a compression tank so as to supply compressed air to the air charging pipe; the inflation tube is provided with a first valve. Further, a second valve is arranged on the negative pressure pipe. Further, a third valve is arranged on the exhaust pipe. Furthermore, a partition plate is arranged between the suction casting chamber and the holding furnace.
In another aspect, the present invention further provides a working method of the compressed air-filled explosion-proof vacuum suction casting system, including: placing the casting mold and the riser tube in a suction casting chamber for sealing, and immersing the riser tube in molten metal in a heat preservation furnace; opening a second valve, leading out gas in the suction casting chamber by a negative pressure pipe, and forming a negative pressure environment in the suction casting chamber; injecting molten metal in the heat preservation furnace into the casting die from the liquid lifting pipe to prepare a suction casting blank; after the pressure maintaining of suction casting is finished, closing the second valve, opening the third valve, communicating the exhaust pipe with the outside, recovering the air pressure in the suction casting chamber to normal atmospheric pressure, and refluxing the molten metal in the liquid lifting pipe to the heat preservation furnace; opening the third valve and the first valve simultaneously, and allowing compressed air to enter the suction casting chamber through the gas filling pipe to dilute combustible gas; the exhaust pipe exhausts the combustible gas diluted by the compressed air in the suction casting chamber; and opening the suction casting chamber, closing the first valve and the third valve, and taking out the casting die to obtain a suction casting blank.
The invention has the beneficial effects that the compressed air-filled explosion-proof vacuum suction casting system and the working method thereof are characterized in that the suction casting chamber is provided with the negative pressure pipe, the inflation pipe and the exhaust pipe, and the suction casting chamber is enabled to establish a vacuum state during suction casting work through the negative pressure pipe; after the suction casting pressure maintaining is finished, blowing compressed air into the suction casting chamber through an air charging pipe to mix and dilute combustible gas; the suction casting chamber is communicated with the atmosphere through an exhaust pipe, and the atmospheric pressure of the suction casting chamber is recovered; and simultaneously, combustible gas mixed and diluted by compressed air is discharged outwards through the exhaust pipe, so that the combustible gas is effectively prevented from being ignited and exploded when contacting the high-temperature surface of the liquid lifting pipe when the casting mould is taken out, and safety accidents are avoided. Because of adopting the nitrogen filling mode to carry out the explosion-proof operation in vacuum to the suction casting room before for, this application is through compressed air mix dilution combustible gas, the emergence that can not appear stopping the oxidation reaction incident also need not to change the nitrogen cylinder or use and produce nitrogen gas equipment, effectively reduces use cost, is suitable for the popularization.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a preferred embodiment of a compressed air explosion-proof vacuum suction casting system of the present invention.
In the figure: the device comprises a suction casting chamber 1, a holding furnace 2, a casting mold 3, a riser tube 4, a negative pressure tube 5, a gas filling tube 6, an exhaust tube 7, a compression tank 8, a first valve 9, a second valve 10, a third valve 11 and a partition plate 12.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the explosion-proof vacuum suction casting system filled with compressed air of the present embodiment includes: the device comprises a suction casting chamber 1, a heat preservation furnace 2, a casting mold 3, a liquid lifting pipe 4, a negative pressure pipe 5, an inflation pipe 6 and an exhaust pipe 7; wherein, the suction casting chamber 1 is a sealing structure which can be opened and closed; the holding furnace 2 is arranged at one side of the suction casting chamber 1 to contain molten metal; the casting mould 3 is arranged in the suction casting chamber 1 to prepare molten metal into a suction casting blank; the liquid lifting pipe 4 is arranged in the suction casting chamber 1, one end of the liquid lifting pipe 4 is arranged in the casting mold 3, and the other end of the liquid lifting pipe 4 penetrates out of the suction casting chamber 1 and is immersed in the molten metal in the holding furnace 2; the negative pressure pipe 5 is connected with the suction casting chamber 1 and is suitable for enabling the suction casting chamber 1 to form a negative pressure environment and enabling the suction casting chamber 1 to establish a vacuum state; the gas-filled pipe 6 is connected with the suction casting chamber 1 and is suitable for filling compressed air into the suction casting chamber 1 so as to mix and dilute combustible gas in the suction casting chamber 1; the exhaust pipe 7 is connected with the suction casting chamber 1 and is suitable for exhausting the gas in the suction casting chamber 1. A negative pressure pipe 5, an inflation pipe 6 and an exhaust pipe 7 are arranged on the suction casting chamber 1, and the suction casting chamber 1 is in a vacuum state during suction casting through the negative pressure pipe 5; after the suction casting and pressure maintaining are finished, compressed air is blown into the suction casting chamber 1 through the gas filling pipe 6 to mix and dilute combustible gas; the suction casting chamber 1 is directly communicated with the atmosphere through the exhaust pipe 7, and the suction casting chamber 1 recovers the atmospheric pressure; and simultaneously, combustible gas mixed and diluted by compressed air is discharged outwards through the exhaust pipe 7, so that the combustible gas is effectively prevented from being ignited and exploding when contacting the high-temperature surface of the liquid lifting pipe 4 when the casting mould 3 is taken out, and safety accidents are avoided. Because of adopting the nitrogen filling mode to inhale casting room 1 and carrying out the explosion-proof operation in vacuum before for, this application is through compressed air mix dilution combustible gas, the emergence that can not appear preventing the oxidation reaction incident also need not to change the nitrogen cylinder or use and produce nitrogen gas equipment, effectively reduces use cost, is suitable for the popularization.
As shown in fig. 1, in the present embodiment, a compression tank 8 is optionally connected to an air inlet end of the air charging pipe 6 to supply compressed air to the air charging pipe 6; the gas-filled tube 6 is provided with a first valve 9. Compress the outside air through compression jar 8, through opening first valve 9 after the suction casting pressurize is accomplished, carry compressed air for suction casting room 1 through gas tube 6 to make compressed air mix and dilute with the combustible gas who sucks in the casting room 1, effectively avoid combustible gas concentration too big, can not ignite combustible gas because of the residual metal liquid temperature of casting mould 3 and stalk 4 contact surface is higher, discharge after the combustible gas dilutes and inhale casting room 1. Personal safety accidents and equipment safety accidents caused by the fact that gas is instantaneously expanded to generate explosion reaction due to severe oxidation reaction are avoided, and personal safety and equipment safety are guaranteed. Through setting up first valve 9 to make things convenient for control gas tube 6 to inhale cast room 1 and carry compressed air, compressed air's delivery volume is effectively controlled, practices thrift the cost.
As shown in fig. 1, in the present embodiment, it is preferable that a second valve 10 is provided on the negative pressure pipe 5. The negative pressure pipe 5 is connected with a negative pressure pump, the gas in the suction casting chamber 1 is pumped by the negative pressure pump and is exhausted from the negative pressure pipe 5, so that the suction casting chamber 1 is in a vacuum state during suction casting work, and the electronic valve is closed after the suction casting is finished. Ensuring that the casting mould 3 and the lift tube 4 normally prepare suction casting blanks. The design of the second valve 10 is used to control the negative pressure pipe 5 to lead out the gas of the suction casting chamber 1.
As shown in fig. 1, in the present embodiment, it is preferable that a third valve 11 is provided on the exhaust pipe 7. The third valve 11 is open to the atmosphere and is used for controlling the exhaust pipe 7 to restore the atmospheric pressure of the suction casting chamber 1 and discharging combustible gas mixed with compressed air in the suction casting chamber 1. Through regulation and control first valve 9 and third valve 11 to after suction casting pressurize is accomplished, gas tube 6 and blast pipe 7 are unobstructed simultaneously, realize compressed air and get into suction casting room 1 and the gaseous intensive mixing of combustible gas dilutes, and discharge suction casting room 1 ensures that combustible gas fully gets rid of, avoids taking place the incident.
As shown in fig. 1, in the present embodiment, it is preferable that a partition plate 12 is provided between the suction casting chamber 1 and the holding furnace 2. So that the suction casting chamber 1 can be effectively sealed in a closed state to ensure suction casting of the casting. Meanwhile, the heat in the heat preservation furnace 2 is prevented from being conducted to the suction casting chamber 1.
In the present embodiment, as shown in fig. 1, in the actual suction casting operation, the mold 3 and the lift tube 4 are sealed in the suction casting chamber 1. Then the lower part of the liquid lifting pipe 4 is immersed into the molten metal, the second valve 10 is opened to enable the suction casting chamber 1 to establish a vacuum state, and the molten metal is sucked into the casting mould 3. When the pressure in the suction casting chamber 1 reaches a set value, the second valve 10 is closed and kept for a period of time, then the third valve 11 is opened, the normal atmospheric pressure in the suction casting chamber 1 is restored, and at the moment, the molten metal in the liquid lifting pipe 4 flows back to the holding furnace 2. At the same time as the third valve 11 is opened, the first valve 9 is opened, and the compressed air in the compression tank 8 is charged into the suction casting chamber 1, mixed and diluted with the combustible gas generated in the mold 3, and then discharged out of the suction casting chamber 1 through the third valve 11 together. Therefore, when the casting mold 3 is taken away, the gas is prevented from contacting the high-temperature surface of the liquid lifting pipe and being ignited to explode, and the personal safety and the equipment safety can be effectively guaranteed. The chamber 1 is then opened and the first valve 9 and the third valve 11 are closed. And taking away the casting die 3 to finally obtain the suction casting blank.
Example 2
As shown in fig. 1, on the basis of embodiment 1, the second embodiment provides a working method of a compressed air-filled explosion-proof vacuum suction casting system, which includes:
placing a casting mold 3 and a liquid lifting pipe 4 in a suction casting chamber 1 for sealing, and immersing the liquid lifting pipe 4 in molten metal in a holding furnace 2; opening the second valve 10, leading out the gas in the suction casting chamber 1 by the negative pressure pipe 5, and forming a negative pressure environment in the suction casting chamber 1; the molten metal in the holding furnace 2 is injected into the casting die 3 from the liquid lifting pipe 4 to prepare a suction casting blank; after the pressure maintaining of suction casting is finished, the second valve 10 is closed, the third valve 11 is opened, the exhaust pipe 7 is communicated with the outside, the air pressure in the suction casting chamber 1 is recovered to be normal atmospheric pressure, and the molten metal in the liquid lifting pipe 4 flows back to the heat preservation furnace 2; when the third valve 11 is opened, the first valve 9 is opened, and compressed air enters the suction casting chamber 1 through the gas filling pipe 6 to be mixed and diluted with combustible gas; the exhaust pipe 7 exhausts the combustible gas mixed and diluted by the compressed air in the suction casting chamber 1; and opening the suction casting chamber 1, closing the first valve 9 and the third valve 11, and taking out the casting die 3 to obtain a suction casting blank.
In summary, the compressed air-filled explosion-proof vacuum suction casting system and the working method thereof have the advantages that the suction casting chamber is provided with the negative pressure pipe, the air charging pipe and the exhaust pipe, and the suction casting chamber is enabled to establish a vacuum state during suction casting work through the negative pressure pipe; after the suction casting pressure maintaining is finished, blowing compressed air into the suction casting chamber through an air charging pipe to mix and dilute combustible gas; the suction casting chamber is communicated with the atmosphere through an exhaust pipe, and the atmospheric pressure of the suction casting chamber is recovered; and simultaneously, combustible gas mixed and diluted by compressed air is discharged outwards through the exhaust pipe, so that the combustible gas is effectively prevented from being ignited and exploded when contacting the high-temperature surface of the liquid lifting pipe when the casting mould is taken out, and safety accidents are avoided. For before, because of adopting the mode of filling nitrogen to carry out the explosion-proof operation in vacuum to the suction casting room, this application is through compressed air mix dilution combustible gas, the emergence that prevents the oxidation reaction incident can not appear, also need not to change the nitrogen cylinder or use and produce nitrogen gas equipment, effectively reduces use cost, is suitable for the popularization. Through the cooperation use of first valve, second valve and third valve, blow into compressed air in to the suction casting room, dilute the combustible gas that the suction casting in-process produced and in time discharge, the combustible gas contacts the high temperature surface of stalk and ignites the emergence explosion when preventing to take away the casting mould, guarantees personal safety and equipment safety.
The components (components without specific structures) selected for use in the present application are all common standard components or components known to those skilled in the art, and the structures and principles thereof can be known to those skilled in the art through technical manuals or through routine experimental methods.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An explosion-proof vacuum suction casting system charged with compressed air, comprising: the suction casting chamber can be opened and closed; the heat preservation furnace is arranged on one side of the suction casting chamber and used for containing molten metal; the casting die is arranged in the suction casting chamber to prepare molten metal into a suction casting blank; the liquid lifting pipe is arranged in the suction casting chamber, one end of the liquid lifting pipe is arranged in the casting mold, and the other end of the liquid lifting pipe penetrates out of the suction casting chamber and is immersed in the molten metal of the holding furnace;
the negative pressure pipe is connected with the suction casting chamber and is suitable for enabling the suction casting chamber to form a negative pressure environment; the gas filling pipe is connected with the suction casting chamber and is suitable for filling compressed air into the suction casting chamber so as to dilute combustible gas in the suction casting chamber; and the exhaust pipe is connected with the suction casting chamber and is suitable for exhausting gas in the suction casting chamber.
2. The explosion-proof vacuum suction casting system charged with compressed air as claimed in claim 1, wherein a compression tank is connected to an air inlet end of the air charging pipe to supply compressed air to the air charging pipe; the inflation pipe is provided with a first valve.
3. The system of claim 1, wherein the negative pressure tube is provided with a second valve.
4. The system of claim 1, wherein the exhaust pipe is provided with a third valve.
5. The explosion-proof vacuum suction casting system charged with compressed air as set forth in claim 1, wherein a partition is provided between the suction casting chamber and the holding furnace.
6. A working method of an explosion-proof vacuum suction casting system filled with compressed air is characterized by comprising the following steps: placing the casting mold and the riser tube in a suction casting chamber for sealing, and immersing the riser tube in molten metal in a heat preservation furnace; opening a second valve, leading out gas in the suction casting chamber by a negative pressure pipe, and forming a negative pressure environment in the suction casting chamber; injecting molten metal in the heat preservation furnace into the casting die from the liquid lifting pipe to prepare a suction casting blank; after the pressure maintaining of suction casting is finished, closing the second valve, opening the third valve, communicating the exhaust pipe with the outside, recovering the air pressure in the suction casting chamber to normal atmospheric pressure, and refluxing the molten metal in the liquid lifting pipe to the heat preservation furnace; opening the third valve and the first valve simultaneously, and allowing compressed air to enter the suction casting chamber through the gas filling pipe to dilute combustible gas; the exhaust pipe exhausts the combustible gas diluted by compressed air in the suction casting chamber; and opening the suction casting chamber, closing the first valve and the third valve, and taking out the casting die to obtain a suction casting blank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110582244.5A CN115401185A (en) | 2021-05-27 | 2021-05-27 | Explosion-proof vacuum suction casting system filled with compressed air and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110582244.5A CN115401185A (en) | 2021-05-27 | 2021-05-27 | Explosion-proof vacuum suction casting system filled with compressed air and working method thereof |
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| CN115401185A true CN115401185A (en) | 2022-11-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908220A (en) * | 2006-08-21 | 2007-02-07 | 重庆大学 | High temperature flame-proof protecting method for magnesium and alloy thereof |
| DE102006027171A1 (en) * | 2006-06-07 | 2007-12-13 | BAM Bundesanstalt für Materialforschung und -prüfung | Device for low pressure hot casting of light weight metal component, comprises intake for transporting casting mass, a form tool for filling with the casting mass, and pressure amplifier having piston with upstream and downstream sections |
| CN102847916A (en) * | 2012-09-14 | 2013-01-02 | 西安航空动力股份有限公司 | Method for forming vacuum suction castings |
| US20150180065A1 (en) * | 2013-12-19 | 2015-06-25 | Hyundai Motor Company | Hydrogen purge unit for fuel cell system |
| CN109603334A (en) * | 2019-01-16 | 2019-04-12 | 广西玉柴机器股份有限公司 | A kind of high-temperature smoke dust removal method and device |
| CN109807309A (en) * | 2017-11-20 | 2019-05-28 | 科华控股股份有限公司 | A kind of suction pouring room nitrogen charging explosion-protection equipment |
-
2021
- 2021-05-27 CN CN202110582244.5A patent/CN115401185A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027171A1 (en) * | 2006-06-07 | 2007-12-13 | BAM Bundesanstalt für Materialforschung und -prüfung | Device for low pressure hot casting of light weight metal component, comprises intake for transporting casting mass, a form tool for filling with the casting mass, and pressure amplifier having piston with upstream and downstream sections |
| CN1908220A (en) * | 2006-08-21 | 2007-02-07 | 重庆大学 | High temperature flame-proof protecting method for magnesium and alloy thereof |
| CN102847916A (en) * | 2012-09-14 | 2013-01-02 | 西安航空动力股份有限公司 | Method for forming vacuum suction castings |
| US20150180065A1 (en) * | 2013-12-19 | 2015-06-25 | Hyundai Motor Company | Hydrogen purge unit for fuel cell system |
| CN109807309A (en) * | 2017-11-20 | 2019-05-28 | 科华控股股份有限公司 | A kind of suction pouring room nitrogen charging explosion-protection equipment |
| CN109603334A (en) * | 2019-01-16 | 2019-04-12 | 广西玉柴机器股份有限公司 | A kind of high-temperature smoke dust removal method and device |
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