CN102727077B - Pressure kettle vent valve and its preparation method - Google Patents
Pressure kettle vent valve and its preparation method Download PDFInfo
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- CN102727077B CN102727077B CN201110089109.3A CN201110089109A CN102727077B CN 102727077 B CN102727077 B CN 102727077B CN 201110089109 A CN201110089109 A CN 201110089109A CN 102727077 B CN102727077 B CN 102727077B
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- vent valve
- thimble
- powder
- pressure kettle
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- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 23
- 210000003205 muscle Anatomy 0.000 claims abstract description 19
- 238000013022 venting Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000004663 powder metallurgy Methods 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000004200 microcrystalline wax Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000001721 transfer moulding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to pressure kettle technical field, specifically disclose a kind of pressure kettle vent valve and its preparation method. Pressure kettle vent valve comprises exhaust valve and is arranged at the vent valve thimble of described exhaust valve inner chamber; Being provided with many between the inner peripheral wall and the outer circle wall of described vent valve thimble of described exhaust valve and be connected muscle, the space between adjacent two connection muscle forms venting hole; Described exhaust valve, vent valve thimble and connection muscle are one-body molded by powder metallurgical technique; Before the thimble of described vent valve thimble front end, cone height is 1-3 millimeter. Its method comprises joins powder, shaping, sintering, antirust treatment step. Compared with prior art, its condemnation factor is lower, environmental protection more in the present invention, and its manufacturing procedure is simpler, cost is lower.
Description
Technical field
The invention belongs to pressure kettle technical field, it is specifically related to a kind of pressure kettle vent valve and its preparation method.
Background technology
Pressure kettle vent valve must safety and environment protection, wherein the key factor of safety is that namely the weight of vent valve itself, environmental protection are without being harmful to exudate.
As shown in Figure 1, current pressure kettle vent valve, comprises exhaust valve 1 and vent valve thimble 2; Wherein, exhaust valve 1 be through blanking, weigh, spinning or forging and stamping processing, follow-up cuttings formation; Wherein, vent valve thimble 2 also to be formed through blanking and follow-up cutting; After exhaust valve 1 and vent valve thimble 2 machine respectively, then through plastic cement 3, the two is linked together; A circular cavity is formed using as exhaust-duct, to extend to the venting hole 5 of bottom between exhaust valve 1 inner peripheral wall and vent valve thimble 2 outer circle wall.
As shown in Figure 1, due to the labile factor of blanking, sealing effect preferably to ensure that vent valve thimble 2 can have with the exhaust nozzle on high-pressure cooker cover, be positioned at cone 21 before the thimble of vent valve thimble 2 front end, the high H from its summit to its bottom surface is greater than 3.5mm usually.
As from the foregoing, the major portion exhaust valve 1 of existing pressure kettle vent valve and vent valve thimble 2 be all by blanking, weigh, prepared by the mechanical workout mode such as spinning or forging and stamping processing, follow-up cutting. Operation is various easily causes its weight unstable, wherein blanking procedure affects the biggest factor of its weight, owing to precision and the accuracy of the irregular of material and blanking are poor, thus cause its deadweight fluctuating range big, easily exceed the safety requirements scope of deadweight, and then cause potential safety hazard or high scrap rate. Only having about 70% according to the first-time qualification rate of existing structure and working method, the scrap rate being also namely time processing is up to about 30%.
And, spinning or forging and stamping are processed with the residual of lubricating oil, and when high temperature or high pressure, lubricating oil will ooze out, thus cause food safety hidden danger.
Meanwhile, when exhaust valve and vent valve thimble being processed as one by plastics, inaccurate owing to locating, the exhaust nozzle on the vent valve thimble of the finished product produced and high-pressure cooker cover can not form good sealing effect, causes product failure.
Existing pressure kettle vent valve, due to its reasons in structure, makes it manufacturing procedure various, in addition higher scrap rate, and its production cost remains high always.
Summary of the invention
In order to solve the problem, it is an object of the invention to provide a kind of make its scrap rate lower pressure kettle exhaust structure and its preparation method.
For achieving the above object, the present invention is adopted technical scheme as follows:
A kind of pressure kettle vent valve, comprises exhaust valve and is arranged at the vent valve thimble of described exhaust valve inner chamber; Being provided with many between the inner peripheral wall and the outer circle wall of described vent valve thimble of described exhaust valve and be connected muscle, the space between adjacent two connection muscle forms venting hole; Described exhaust valve, vent valve thimble and connection muscle are one-body molded by powder metallurgical technique; Before the thimble of described vent valve thimble front end, cone height is 1-3 millimeter.
Preferably, coordinate preferably and sealing effect to make vent valve thimble and the exhaust nozzle on high-pressure cooker cover have, additionally it is possible to adopting powder metallurgical technique technology conveniently to manufacture, before the thimble of described vent valve thimble front end, cone height is 2-2.7 millimeter.
Further, in order to the sealing effect between the exhaust nozzle that promotes further on vent valve thimble and high-pressure cooker cover and guarantee better carrying out of powder technology technology, before the thimble of described vent valve thimble front end, cone height is 2.5 millimeters.
Preferably, in order to make filling molding when adopting powder metallurgical technique to process of the present invention better, described vent valve thimble top is provided with an inverted cone hole.
Prepare a method for described pressure kettle vent valve, comprise the following steps:
(1) by powder metallurgy raw material mixed preparing according to a certain percentage, described powder metallurgy raw material comprises iron powder or the Stainless Steel Powder of the heavy auxiliary agent of 0.5-1.2% and surplus;
(2) the powder metallurgy raw material that step (1) prepares is encased in prefabricated mould, and mode transfer and compression moulding;
(3) product prepared in step (2) is carried out sinter molding.
Preferably, in order to increase the corrosion-resistant of the present invention and abrasion resistance properties, during as adopted iron powder to make product, can also comprising antirust treatment step after described step (3), described antirust treatment comprises preoxidation blackout antirust treatment or plating antirust treatment.
Preferably, in order to gaining in strength and wear resistance of the present invention, described powder metallurgy raw material also includes one or both in copper powder and carbon dust, the add-on of described copper powder is the 0.2-2.5% of described powder metallurgy raw material gross weight, and the add-on of described carbon dust is the 0.2-1% of described powder metallurgy raw material gross weight.
Preferably, in order to make processability of the present invention better, described iron powder selects water smoke iron powder or reduced iron powder, and the specification of described reduced iron powder is loose density >=2.40g/.cm-3, flow velocity >=2.40/s. (50)-1, compressibility >=2.40/g.cm-3。
Preferably, in order to make processability of the present invention better, described auxiliary agent ratio described in described powder metallurgy raw material is 0.8-1%, and described auxiliary agent is micro-wax powder or Zinic stearas.
Further, in order to improve processability further, reduce scrap rate, described auxiliary agent is micro-wax powder.
Powder metallurgy, be produce metal or with metal-powder (or mixture of metal-powder and non-metal powder) as raw material, through overmolding and sintering, manufacture the Technology of metallic substance, compound and all kinds goods. According to current powder metallurgical technique, if cone height is greater than 3 millimeters and has no idea shaping before the thimble of vent valve thimble at all, if cone height is less than 1 millimeter and weares and teares a little before thimble, the exhaust nozzle on vent valve thimble and high-pressure cooker cover can not form good sealing effect.
Therefore, cone height before original thimble is reduced to 1-3 millimeter by the present invention, the connection muscle structure that the present invention adds in addition, and powder metallurgical technique can be used will to state exhaust valve, vent valve thimble and connect muscle one-body molded. Utilizing powder metallurgical technique one-body molded, its product weight and precision are controlled, and the condemnation factor certainly caused because of its deadweight fluctuation reduces greatly. And, the present invention adopts powder metallurgical technique one-body molded, and its size error is minimum, so cone before no longer needing reserved higher thimble, to prevent occurring that the exhaust nozzle on vent valve thimble and high-pressure cooker cover can not form the phenomenon of excellent sealing.
Meanwhile, the present invention adopts powder metallurgical technique, no longer includes the residual of lubricating oil, and therefore, the present invention is environmental protection more.
Therefore, compared with prior art, its condemnation factor is lower, environmental protection more in the present invention, and its manufacturing procedure is simpler, cost is lower.
Accompanying drawing explanation
This accompanying drawing illustrates that the picture that provides is used for auxiliary a further understanding of the present invention, forms the part of the application, does not form inappropriate limitation of the present invention, in the accompanying drawings:
Fig. 1 is the longitudinal sectional view of existing pressure kettle exhaust structure;
Fig. 2 is the cross-sectional view of exhaust valve and vent valve thimble structure in the present invention;
Fig. 3 is that the A-A of Fig. 2 is to sectional view;
Fig. 4 is the mould structure schematic diagram of the present invention.
Diagram:
1, exhaust valve 2, vent valve thimble
21, cone 22, inverted cone hole before thimble
3, plastic cement 4, valve body jump ring
5, venting hole 6, connect muscle
71, the first mould 72, two molds
73, the 3rd mould 74, the 4th mould
Embodiment
Below in conjunction with accompanying drawing and specific implementation method, the present invention being described in detail, the exemplary embodiment and description in the present invention are used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1:
As shown in Figure 2 and Figure 3, present embodiment discloses a kind of pressure kettle vent valve, comprise exhaust valve 1, vent valve thimble 2, and other structure units identical with existing pressure kettle vent valve (due to, other composition components and existing identical, not shown in FIG.), such as valve body jump ring etc. Wherein, being provided with many and be connected muscle 5 between the inner peripheral wall and the outer circle wall of described vent valve thimble 2 of described exhaust valve 1, the space between adjacent two connection muscle 5 forms venting hole; Wherein, described exhaust valve 1, vent valve thimble 2 and connection muscle 5 are one-body molded by powder metallurgical technique; Wherein, before the thimble of described vent valve thimble 2 front end, cone 21 height H are 1-3 millimeter; Wherein, described vent valve thimble 2 top is provided with an inverted cone hole 22.
Further preferred embodiment, before the thimble of vent valve thimble 2 front end, cone 21 height H are 2-2.7 millimeter.
As the enforcement mode of the best of the present invention, before the thimble of vent valve thimble 2 front end, cone 21 height H are 2.5 millimeters.
Also it should be noted that; the present embodiment figure only schematically depict the situation that three connect muscle; certainly; the number connecting muscle can also be other numbers; as long as by being connected, muscle connects with vent valve thimble to adopt exhaust valve; between adjacent connection muscle, form the structure of venting hole, it is all protection scope of the present invention.
Embodiment 2:
Present embodiment discloses a kind of method preparing pressure kettle vent valve, comprise the following steps:
(1) by powder metallurgy raw material mixed preparing according to a certain percentage, described powder metallurgy raw material comprises iron powder or the Stainless Steel Powder of the heavy auxiliary agent of 0.5-1.2% and surplus; Wherein, described iron powder is water smoke iron powder or reduced iron powder, and described reduced iron powder is loose density >=2.40/g.cm-3, flow velocity >=2.40/s. (50)-1, compressibility >=2.40/g.cm-3; Wherein, it is preferable that water smoke iron powder, because its processability is better; Described auxiliary agent can select micro-wax powder or Zinic stearas; Wherein, it is preferable that micro-wax powder, because its formability is better, adopt the condemnation factor of micro-cured powder probably about 1%, adopt the condemnation factor of Zinic stearas probably about 10%; Wherein, auxiliary agent preferred proportion in described powder metallurgy raw material is 0.8-1%;
(2) the powder metallurgy raw material that step (1) prepares is encased in prefabricated mould, and mode transfer and compression moulding; As shown in Figure 4, being a kind of mould structure schematic diagram of the present invention, comprise the first mould 71, two molds 72, the 3rd mould 73 and the 4th mould 74, product of the present invention is in the middle of these four moulds; Certainly, according to the product structure of the present invention, other various different moulds conventionally can also be produced;
(3) product prepared in step (2) is carried out sinter molding;
(4) in step (3), the product of preparation carries out antirust treatment, and described antirust treatment comprises preoxidation blackout antirust treatment or plating antirust treatment.
Embodiment 3:
In order to increase intensity and the wear resistance of the present invention, the present embodiment composition and proportioning of being powder metallurgy raw material different from embodiment 2, it comprises: the iron powder of the copper powder that the auxiliary agent of 0.5-1.2% weight, 0.2-2.5% are heavy and surplus.
Embodiment 4:
In order to increase intensity and the wear resistance of the present invention, the present embodiment composition and proportioning of being powder metallurgy raw material different from embodiment 2, it comprises: the iron powder of the carbon dust that the auxiliary agent of 0.5-1.2% weight, 0.2-1% are heavy and surplus.
Embodiment 5:
In order to increase intensity and the wear resistance of the present invention further, the present embodiment composition and proportioning of being powder metallurgy raw material different from embodiment 2, it comprises: copper powder, the carbon dust of 0.2-1% weight and the iron powder of surplus that the auxiliary agent of 0.5-1.2% weight, 0.2-2.5% weigh.
The technical scheme embodiment of the present invention provided above is described in detail, applying specific case herein the principle of the embodiment of the present invention and enforcement mode to have been set forth, the explanation of above embodiment is only applicable to help the principle understanding the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, all will change in embodiment and range of application, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a pressure kettle vent valve, comprises exhaust valve (1) and is arranged at the vent valve thimble (2) of described exhaust valve (1) inner chamber, it is characterised in that:
Being provided with many between the inner peripheral wall and the outer circle wall of described vent valve thimble (2) of described exhaust valve (1) and be connected muscle (5), the space between adjacent two connections muscle (5) forms venting hole;
Described exhaust valve (1), vent valve thimble (2) and connection muscle (5) are one-body molded by powder metallurgical technique;
Before the thimble of described vent valve thimble (2) front end, cone (21) is highly 1-3 millimeter;
Described vent valve thimble (2) top is provided with an inverted cone hole (22).
2. pressure kettle vent valve according to claim 1, it is characterised in that:
Before the thimble of described vent valve thimble (2) front end, cone (21) is highly 2-2.7 millimeter.
3. pressure kettle vent valve according to claim 1, it is characterised in that:
Before the thimble of described vent valve thimble (2) front end, cone (21) is highly 2.5 millimeters.
4. prepare the method for pressure kettle vent valve described in claim 1 for one kind, it is characterised in that, comprise the following steps:
(1) by powder metallurgy raw material mixed preparing according to a certain percentage, described powder metallurgy raw material comprises iron powder or the Stainless Steel Powder of the heavy auxiliary agent of 0.5-1.2% and surplus;
(2) the powder metallurgy raw material that step (1) prepares is encased in prefabricated mould, and mode transfer and compression moulding;
(3) product prepared in step (2) is carried out sinter molding; Also comprising antirust treatment step after described step (3), described antirust treatment comprises preoxidation blackout antirust treatment or plating antirust treatment.
5. the method preparing pressure kettle vent valve according to claim 4, it is characterised in that:
Described powder metallurgy raw material also includes in copper powder and carbon dust one or both;
The add-on of described copper powder is the 0.2-2.5% of described powder metallurgy raw material gross weight;
The add-on of described carbon dust is the 0.2-1% of described powder metallurgy raw material gross weight.
6. the method preparing pressure kettle vent valve according to claim 4, it is characterised in that:
Described iron powder is water smoke iron powder or reduced iron powder or Stainless Steel Powder;
The specification of described reduced iron powder is loose density >=2.40/g.cm-3, flow velocity >=2.40/s. (50)-1, compressibility >=2.40/g.cm-3。
7. the method preparing pressure kettle vent valve according to claim 4, it is characterised in that:
Described auxiliary agent ratio described in described powder metallurgy raw material is 0.8-1%;
Described auxiliary agent is micro-wax powder or Zinic stearas.
8. the method preparing pressure kettle vent valve according to claim 7, it is characterised in that:
Described auxiliary agent is micro-wax powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110089109.3A CN102727077B (en) | 2011-03-30 | 2011-03-30 | Pressure kettle vent valve and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110089109.3A CN102727077B (en) | 2011-03-30 | 2011-03-30 | Pressure kettle vent valve and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102727077A CN102727077A (en) | 2012-10-17 |
| CN102727077B true CN102727077B (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110089109.3A Active CN102727077B (en) | 2011-03-30 | 2011-03-30 | Pressure kettle vent valve and its preparation method |
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| CN (1) | CN102727077B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567435A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103521757B (en) * | 2013-10-22 | 2015-10-28 | 东南大学 | Containing powder metallurgy iron copper base oil-containing antifriction material and the preparation method of rare earth oxide |
| CN107713732A (en) * | 2017-11-24 | 2018-02-23 | 广东惠利普路桥信息工程有限公司 | A kind of complete period electric pressure cooking saucepan production control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2171284Y (en) * | 1993-08-25 | 1994-07-13 | 刘嘉祥 | Anti-explode exhause valve for pressure cooker of household |
| EP1552776A1 (en) * | 2004-01-09 | 2005-07-13 | Seb S.A. | Pressure cooker provided with a security valve made of elastomeric material |
| CN201668283U (en) * | 2010-05-21 | 2010-12-15 | 东莞市步步高家用电器有限公司 | Gravity pressure limiting valve |
| CN201668281U (en) * | 2010-05-11 | 2010-12-15 | 佛山市顺德区怡达电器制造有限公司 | Pressure limiting exhaust valve of pressure cooker |
| CN101920720A (en) * | 2010-09-09 | 2010-12-22 | 烟台东一粉末冶金制造有限公司 | Plunger body and manufacturing method thereof |
| CN201767752U (en) * | 2010-09-16 | 2011-03-23 | 杨培畅 | Pressure limiting valve of electric pressure cooker |
-
2011
- 2011-03-30 CN CN201110089109.3A patent/CN102727077B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2171284Y (en) * | 1993-08-25 | 1994-07-13 | 刘嘉祥 | Anti-explode exhause valve for pressure cooker of household |
| EP1552776A1 (en) * | 2004-01-09 | 2005-07-13 | Seb S.A. | Pressure cooker provided with a security valve made of elastomeric material |
| CN201668281U (en) * | 2010-05-11 | 2010-12-15 | 佛山市顺德区怡达电器制造有限公司 | Pressure limiting exhaust valve of pressure cooker |
| CN201668283U (en) * | 2010-05-21 | 2010-12-15 | 东莞市步步高家用电器有限公司 | Gravity pressure limiting valve |
| CN101920720A (en) * | 2010-09-09 | 2010-12-22 | 烟台东一粉末冶金制造有限公司 | Plunger body and manufacturing method thereof |
| CN201767752U (en) * | 2010-09-16 | 2011-03-23 | 杨培畅 | Pressure limiting valve of electric pressure cooker |
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| CN102727077A (en) | 2012-10-17 |
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Effective date of registration: 20160704 Address after: 510000 a104-a110, no.351-1, Caixin Road, Lanhe Town, Nansha District, Guangzhou City, Guangdong Province (part: a104) Patentee after: Guangzhou City Light Ming Metal Products Co., Ltd. Address before: 511400, room 29, No. 401, compound 363, Changxin Road, Tianhe District, Guangdong, Guangzhou Patentee before: Lin Nuanhui |