CN2718480Y - Partial pressure controlling vacuum degreasing sintering furnace - Google Patents
Partial pressure controlling vacuum degreasing sintering furnace Download PDFInfo
- Publication number
- CN2718480Y CN2718480Y CN 200420035435 CN200420035435U CN2718480Y CN 2718480 Y CN2718480 Y CN 2718480Y CN 200420035435 CN200420035435 CN 200420035435 CN 200420035435 U CN200420035435 U CN 200420035435U CN 2718480 Y CN2718480 Y CN 2718480Y
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- pressure
- vacuum
- intelligent electric
- servo
- degreasing
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Abstract
The utility model discloses a partial pressure controlling vacuum degreasing sintering furnace. A graphite fire box (4) and a furnace frame (5) are respectively provided with piezometry sensors (1), (3) and matched PID pressure control meters. Meanwhile, a vacuum pipe (11) and a gas ducting (7) are respectively provided with intelligent electric servo vacuum valves (2), (6). The two intelligent electric servo vacuum valves are controlled through the two pressure control meters. The vacuum extracting speed and the charging gas flow are adjusted through the two pressure control meters. Thereby, two pressure values are formed in the graphite fire box (4) and the furnace frame (5). The degreasing procedure is realized through a pressure difference formed in the outlet and the inlet of the graphite fire box (4). Thus, the directed flow of the charging gas can be prompted. The directed air current degreasing of differential pressure type is realized. In the sintering operation, the pressure values in the graphite fire box (4) and the furnace frame (5) are set to be accordant. Thus, the constant voltage sintering is realized.
Description
Technical field
The utility model relates to the vacuum plant of a kind of degreasing, sintering integratedization, particularly relates to a kind of energy by realize the vacuum degreasing sintered all-in-one oven of branch pressure-controlled formula of different production processes with different pressure controling modes at same vacuum tank diverse location.
Background technology
Similar before this vacuum degreasing sintered stove generally only depends on the decimate action of vavuum pump to capture lipid material in the sintered metal product at skimming processes; And sintering circuit is to finish under the unsettled pressure environment of a continuous extracting vacuum of vavuum pump.This vacuum drying oven lipid in skimming processes is deposited on body of heater, heat-insulation layer and heater surface in a large number, pollutes internal environment, and heat-insulation layer and heater shorten service life, and the heat-insulating property of sedimentary deposit reduction body of heater, influences the result of use of vacuum drying oven greatly.After entering sintering circuit, because of furnace pressure instability in the sintering process, can cause the densification process instability of porous sintered goods again, the inhomogeneities contraction takes place in each position when serious, causes the mutation of shape.Also can reduce the compactness of goods when slight, the physical and chemical index of goods is reduced significantly.
The utility model content
The purpose of this utility model provides and a kind ofly can realize degreasing, the vacuum degreasing sintered all-in-one oven of branch pressure-controlled formula that sintering circuit is integrated and production efficiency is high, production cost is low, product quality is high.
In order to reach above-mentioned technical purpose, the technical solution adopted in the utility model is: a kind of minute vacuum degreasing sintered all-in-one oven of pressure-controlled formula, comprise body of heater, vacuum pipe, graphite burner hearth and separator, it is characterized in that: between described body of heater and graphite burner hearth, be formed with the stove frame, described stove frame is provided with the gas ducting and second pressure sensor, be provided with the servo vacuum valve of second intelligent electric on described gas ducting, described second pressure sensor electrically connects by the second PID pressure controller and the servo vacuum valve of described second intelligent electric; Be provided with first pressure sensor in described graphite burner hearth, described first pressure sensor electrically connects by the first PID pressure controller with the servo vacuum valve of first intelligent electric that is located at described separator inlet.
Servo vacuum valve of described first intelligent electric and the servo vacuum valve of second intelligent electric can be electrical servo valve, hydraulic efficiency servo-valve or other can carry out the servo valve of continuous control action.
Described first pressure controller and second pressure controller are the PID pressure controller.
Adopt the vacuum degreasing sintered all-in-one oven of branch pressure-controlled formula of technique scheme, on the first PID pressure controller, can set a graphite furnace breech pressure value P
1, the first PID pressure controller is controlled the pumping speed that the switching amount of the servo vacuum valve of first intelligent electric is regulated the vacuum unit, thereby realizes that graphite furnace breech pressure P1 remains unchanged.Equally, the second PID pressure controller that second pressure sensor is installed in the stove frame and matches, with on the gas ducting that the stove frame directly links to each other the second electrical servo vacuum valve is installed, on the second PID pressure controller, can set a stove frame internal pressure value P
2, the second PID pressure controller is controlled the adjusting flow of aerating air of the servo vacuum valve of second intelligent electric, thereby realizes that stove frame internal pressure remains unchanged substantially.
In degreasing production process process, can set graphite furnace breech pressure P
1Less than stove frame internal pressure P
2Thereby, the outlet of graphite burner hearth with go into pressure differential of interruption-forming, impel air-flow directed flow in the burner hearth.After having lipid material to evaporate in the sintered metal product, under the effect of windstream, force lipid material to be extracted in the separator, thereby guaranteeing that lipid material can not volatilize stick on furnace body wall and the insulation material, has good degreasing effect along vacuum pipe.Because of there not being lipid material to stick in the body of heater, thoroughly solved cleaning difficulty in the body of heater, technical problem such as heater, insulation material are short service life because of sticking fat, and the goods degreasing is unclean has improved production efficiency greatly and has reduced production cost.
In SINTERING PRODUCTION operation process, can be with graphite furnace breech pressure P
1With internal pressure P in the stove frame
2Be set at an identical little negative pressure value, keep furnace pressure constant, realize little negative constant voltage sintering.Can effectively prevent the densification process instability of the porous article that causes because of pressure transient in the sintering process, the article shape mutation phenomenon that produces when serious, thus improve the compactness of goods, improve the product physicochemical property, significantly promote product quality.
In sum, the utility model be a kind ofly can realize degreasing, sintering circuit is integrated and production efficiency is high, production cost is low, product quality is high and the vacuum degreasing sintered all-in-one oven of branch pressure-controlled formula simple in structure, easily manufactured, dependable performance.
Description of drawings
Accompanying drawing is the utility model structural representation.
The specific embodiment
Referring to accompanying drawing, between body of heater 9 and graphite burner hearth 4, be formed with stove frame 5, stove frame 5 is provided with the gas ducting 7 and second pressure sensor 3, being provided with servo vacuum valve 6, the second pressure sensors 3 of second intelligent electric on gas ducting 7 electrically connects by the second PID pressure controller and the servo vacuum valve 6 of second intelligent electric; Being provided with first pressure sensor, 1, the first pressure sensor 1 in graphite burner hearth 4 electrically connects by the first PID pressure controller with the servo vacuum valve of first intelligent electric (2) that is located at separator 8 inlets.
Servo vacuum valve 2 of first intelligent electric and the servo vacuum valve 6 of second intelligent electric can be electrical servo valve, hydraulic efficiency servo-valve or other can carry out the servo valve of continuous control action.
Adopt the vacuum degreasing sintered all-in-one oven of branch pressure-controlled formula of technique scheme, on the first PID pressure controller 1, can set a graphite burner hearth 4 internal pressure value P
1, the first PID pressure controller is controlled the pumping speed that the switching amount of the servo vacuum valve 2 of first intelligent electric is regulated vacuum unit 10, thereby realizes graphite burner hearth 4 internal pressure P
1Remain unchanged.Equally, the second PID pressure controller that second pressure sensor 3 is installed in stove frame 5 and matches, with on the gas ducting 7 that stove frame 5 directly links to each other the second electrical servo vacuum valve 6 is installed, on the second PID pressure controller, can set a stove frame internal pressure value P
2, the second PID pressure controller is controlled the adjusting flow of aerating air of the servo vacuum valve 6 of second intelligent electric, thereby realizes that stove frame 5 internal pressures remain unchanged.
In degreasing production process process, can set graphite burner hearth 4 internal pressure P
1Less than stove frame 5 internal pressure P
2Form a directed air-flow in the graphite burner hearth (4), after having lipid material to evaporate in the sintered metal product, under the effect of directed steam flow, force lipid material to be extracted in the separator 8 along vacuum pipe 11, thereby guaranteeing that lipid material can not volatilize sticks on furnace body wall and the insulation material, has good degreasing effect.Because of there not being lipid material to stick in the body of heater, thoroughly solved cleaning difficulty in the body of heater, heater, insulation material with sticking fat service life short, technical problem such as the goods degreasing is unclean has improved production efficiency greatly and has reduced production cost.
In SINTERING PRODUCTION operation process, can be with graphite burner hearth 4 internal pressure P
1With internal pressure P in the stove frame 5
2Be set at an identical little negative pressure value, keep furnace pressure constant, realize little negative constant voltage sintering.Can effectively prevent the densification process instability of the porous article that causes because of pressure transient in the sintering process, the article shape mutation phenomenon that produces when serious, thus improve the compactness of goods, improve the product physicochemical property, significantly promote product quality.
Claims (3)
1, a kind of minute vacuum degreasing sintered all-in-one oven of pressure-controlled formula, comprise body of heater (9), vacuum pipe (11), graphite burner hearth (4) and separator (8), it is characterized in that: between described body of heater (9) and graphite burner hearth (4), be formed with stove frame (5), described stove frame (5) is provided with gas ducting (7) and second pressure sensor (3), be provided with the servo vacuum valve of second intelligent electric (6) on described gas ducting (7), described second pressure sensor (3) electrically connects by second pressure controller and the servo vacuum valve of described second intelligent electric (6); Be provided with first pressure sensor (1) in described graphite burner hearth (4), described first pressure sensor (1) electrically connects by first pressure controller with the servo vacuum valve of first intelligent electric (2) that is located at described separator (8) inlet.
2, according to claim 1 minute vacuum degreasing sintered all-in-one oven of pressure-controlled formula is characterized in that: servo vacuum valve of described first intelligent electric (2) and the servo vacuum valve of second intelligent electric (6) can be electrical servo valve or hydraulic efficiency servo-valve.
3, according to claim 1 and 2 minute vacuum degreasing sintered all-in-one oven of pressure-controlled formula, it is characterized in that: described first pressure controller and second pressure controller are the PID pressure controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035435 CN2718480Y (en) | 2004-03-26 | 2004-03-26 | Partial pressure controlling vacuum degreasing sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035435 CN2718480Y (en) | 2004-03-26 | 2004-03-26 | Partial pressure controlling vacuum degreasing sintering furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2718480Y true CN2718480Y (en) | 2005-08-17 |
Family
ID=34893009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420035435 Expired - Fee Related CN2718480Y (en) | 2004-03-26 | 2004-03-26 | Partial pressure controlling vacuum degreasing sintering furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2718480Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980390A (en) * | 2012-12-24 | 2013-03-20 | 苏州工业园区杰士通真空技术有限公司 | Tantalum capacitor vacuum sintering dewaxing furnace |
| CN104930856A (en) * | 2015-07-06 | 2015-09-23 | 上海汇森益发工业炉有限公司 | Differential pressure control system and method of vacuum furnace |
| CN105910435A (en) * | 2016-05-18 | 2016-08-31 | 阿尔赛(苏州)无机材料有限公司 | Degreasing and sintering integrated high-temperature elevator furnace |
| CN110603417A (en) * | 2018-12-21 | 2019-12-20 | 宁波恒普真空技术有限公司 | Vacuum degreasing sintering furnace and using method thereof |
-
2004
- 2004-03-26 CN CN 200420035435 patent/CN2718480Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980390A (en) * | 2012-12-24 | 2013-03-20 | 苏州工业园区杰士通真空技术有限公司 | Tantalum capacitor vacuum sintering dewaxing furnace |
| CN104930856A (en) * | 2015-07-06 | 2015-09-23 | 上海汇森益发工业炉有限公司 | Differential pressure control system and method of vacuum furnace |
| CN105910435A (en) * | 2016-05-18 | 2016-08-31 | 阿尔赛(苏州)无机材料有限公司 | Degreasing and sintering integrated high-temperature elevator furnace |
| CN110603417A (en) * | 2018-12-21 | 2019-12-20 | 宁波恒普真空技术有限公司 | Vacuum degreasing sintering furnace and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |