CN102727077A - Exhaust valve of pressure cooker and preparation method of exhaust valve - Google Patents
Exhaust valve of pressure cooker and preparation method of exhaust valve Download PDFInfo
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- CN102727077A CN102727077A CN2011100891093A CN201110089109A CN102727077A CN 102727077 A CN102727077 A CN 102727077A CN 2011100891093 A CN2011100891093 A CN 2011100891093A CN 201110089109 A CN201110089109 A CN 201110089109A CN 102727077 A CN102727077 A CN 102727077A
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- thimble
- air bleeding
- powder
- exhaust valve
- bleeding valve
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Abstract
The invention belongs to the technical field of pressure cookers, and particularly discloses an exhaust valve of a pressure cooker and a preparation method of the exhaust valve. The exhaust valve of the pressure cooker comprises an exhaust valve body, and an exhaust valve thimble arranged in an internal chamber of the exhaust valve body, wherein a plurality of connecting ribs are arranged between the internal circumferential wall of the exhaust valve body and the external circumferential wall of the exhaust valve thimble and exhaust holes are formed at clearances between every two adjacent connecting ribs; the exhaust valve body, the exhaust valve thimble and the connecting ribs are integrally formed through a powder metallurgy technology; and the front cone of the thimble at the front end of the exhaust valve thimble is 1 to 3 millimeters high. The preparation method comprises the steps of preparing powder, forming, sintering, and rust prevention. Compared with the prior art, the exhaust valve has a lower rejection rate, and is more environment-friendly, simpler in processing process and lower in cost.
Description
Technical field
The invention belongs to the pressure cooker technical field, be specifically related to a kind of pressure cooker air bleeding valve and preparation method thereof.
Background technology
The pressure cooker air bleeding valve must safety and environmental protection, and wherein the key factor of safety is the weight of air bleeding valve itself, and environmental protection promptly is not have the exudate of being harmful to.
Pressure cooker air bleeding valve as shown in Figure 1, present comprises exhaust valve 1 and air bleeding valve thimble 2; Wherein, exhaust valve 1 be through blanking, weigh, spinning or forging and pressing processing, follow-up cutting form; Wherein, air bleeding valve thimble 2 also will pass through blanking and follow-up cutting formation; After exhaust valve 1 machines respectively with air bleeding valve thimble 2, through plastic cement 3 the two is linked together again; Between exhaust valve 1 inner peripheral wall and air bleeding valve thimble 2 outer circle walls, form a circular cavity with as the exhaust passage, to extend to the steam vent 5 of bottom.
As shown in Figure 1; Because the destabilizing factor of blanking; In order to guarantee that the exhaust nozzle on air bleeding valve thimble 2 and the pressure cooker pot cover can have the better seal effect, be positioned at the thimble inner cone 21 of air bleeding valve thimble 2 front ends, the high H from its summit to its bottom surface is usually greater than 3.5mm.
By on can know that the major part exhaust valve 1 of existing pressure cooker air bleeding valve and air bleeding valve thimble 2 all be through blanking, weigh, spinning or machining modes such as forging and pressing processing, follow-up cutting prepare.Various its weight that causes easily of operation is unstable; Wherein blanking operation influences the biggest factor of its weight; Because the precision and the accuracy of the irregular and blanking of material are relatively poor; Thereby cause its deadweight fluctuating range big, exceed the safety requirements scope of deadweight easily, and then cause potential safety hazard or high percent defective.First-time qualification rate according to existing structure and processing method has only about 70%, and the percent defective that is to say time processing is up to about 30%.
And spinning or forging and pressing are processed with the residual of lubricating oil, and lubricating oil will ooze out when high temperature or high pressure, thereby cause food security hidden danger.
Simultaneously, when through plastics exhaust valve and air bleeding valve thimble being processed as one, because the location is inaccurate, the air bleeding valve thimble of the finished product of producing and the exhaust nozzle on the pressure cooker pot cover can not form good sealing effectiveness, cause product failure.
Existing pressure cooker air bleeding valve is owing to its reasons in structure, and it is various to make it manufacturing procedure, and higher in addition percent defective, its production cost are high always.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of make the lower pressure cooker exhaust structure of its percent defective, with and preparation method thereof.
For realizing the foregoing invention purpose, technical scheme that the present invention adopts is following:
A kind of pressure cooker air bleeding valve, the air bleeding valve thimble that comprises exhaust valve and be arranged at said exhaust valve inner chamber; Between the outer circle wall of the inner peripheral wall of said exhaust valve and said air bleeding valve thimble, be provided with many dowels, the space between adjacent two dowels forms steam vent; Said exhaust valve, air bleeding valve thimble and dowel are one-body molded through powder metallurgical technique; Cone height is the 1-3 millimeter before the thimble of said air bleeding valve thimble front end.
Preferably, cooperate preferably and sealing effectiveness in order to make air bleeding valve thimble and exhaust nozzle on the pressure cooker pot cover have, can also adopt that the powder metallurgical technique technology is convenient to be made, cone height is the 2-2.7 millimeter before the thimble of said air bleeding valve thimble front end.
Further, in order further to promote the sealing effectiveness between the exhaust nozzle on air bleeding valve thimble and the pressure cooker pot cover and to guarantee better carrying out of powder technology technology, cone height is 2.5 millimeters before the thimble of said air bleeding valve thimble front end.
Preferably, the filling mouldability when adopting powder metallurgical technique processing of the present invention in order to make is better, is provided with an anti-taper hole at said air bleeding valve thimble top.
A kind of method for preparing said pressure cooker air bleeding valve may further comprise the steps:
(1) with powder metallurgy raw material mixed preparing according to a certain percentage, said powder metallurgy raw material comprises the auxiliary agent that 0.5-1.2% is heavy and the iron powder or the stainless steel powder of surplus;
(2) the powder metallurgy raw material that step (1) is prepared is encased in the prefabricated mould, and mode transfer and compression moulding;
(3) product with preparation in the step (2) carries out sinter molding.
Preferably, in order to increase corrosion-resistant and abrasion resistance properties of the present invention, when adopting the iron powder manufacturing articles, can after said step (3), also comprise antirust treatment step, said antirust processing comprises turn black antirust processing or electroplate antirust processing of pre-oxidation.
Preferably; Gain in strength and wearability for of the present invention; Said powder metallurgy raw material also includes one or both in copper powder and the carbon dust; The addition of said copper powder is the 0.2-2.5% of said powder metallurgy raw material gross weight, and the addition of said carbon dust is the 0.2-1% of said powder metallurgy raw material gross weight.
Preferably, in order to make processability of the present invention better, said iron powder is selected water smoke iron powder or reduced iron powder for use, and the specification of said reduced iron powder is apparent 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, said auxiliary agent is 0.8-1% in ratio described in the said powder metallurgy raw material, and said auxiliary agent is little wax powder or zinc stearate.
Further, in order further to improve processability, the rate of reducing the number of rejects and seconds, said auxiliary agent is little wax powder.
Powder metallurgy, be produce metal or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through moulding and sintering, make the technology of metal material, compound and all kinds goods.According to present powder metallurgical technique; Cone height is greater than 3 millimeters moulding of having no idea at all before the thimble of event exhaust valve thimble; If cone height is less than 1 millimeter wearing and tearing a little before the thimble, the exhaust nozzle on air bleeding valve thimble and the pressure cooker pot cover can not form good sealing effectiveness.
Therefore, the present invention is reduced to the 1-3 millimeter with cone height before the original thimble, the present invention's dowel structure of adding in addition, and it is one-body molded to use powder metallurgical technique will state exhaust valve, air bleeding valve thimble and dowel.Utilize powder metallurgical technique one-body molded, its product weight and precision are controlled, and the scrappage that causes because of its deadweight fluctuation certainly reduces greatly.And the present invention adopts powder metallurgical technique one-body molded, and its scale error is minimum, thus no longer need reserve higher thimble inner cone, to prevent the phenomenon that exhaust nozzle on air bleeding valve thimble and the pressure cooker pot cover can not form excellent sealing.
Simultaneously, 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, the present invention compared with prior art, lower, the environmental protection more of its scrappage, and its manufacturing procedure is simpler, cost is lower.
Description of drawings
The picture that this description of drawings provided is used for auxiliary to further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the longitudinal sectional view of existing pressure cooker exhaust structure;
Fig. 2 is the cross-sectional view of exhaust valve among the present invention and air bleeding valve thimble structure;
Fig. 3 is that the A-A of Fig. 2 is to cutaway view;
Fig. 4 is a mould structure sketch map of the present invention.
Diagram:
1, exhaust valve 2, air bleeding valve thimble
21, thimble inner cone 22, anti-taper hole
3, plastic cement 4, valve body jump ring
5, steam vent 6, dowel
71, first mould 72, second mould
73, the 3rd mould 74, the 4th mould
The specific embodiment
To combine accompanying drawing and practical implementation method to specify the present invention below, be used for explaining the present invention in schematic enforcement of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
Like Fig. 2 and shown in Figure 3, present embodiment discloses a kind of pressure cooker air bleeding valve, comprises exhaust valve 1, air bleeding valve thimble 2; And other structure members identical with existing pressure cooker air bleeding valve (because; Other are formed members and have now identically, do not draw among the figure), such as the valve body jump ring etc.Wherein, between the outer circle wall of the inner peripheral wall of said exhaust valve 1 and said air bleeding valve thimble 2, be provided with many dowels 5, the space between adjacent two dowels 5 forms steam vent; Wherein, said exhaust valve 1, air bleeding valve thimble 2 and dowel 5 are one-body molded through powder metallurgical technique; Wherein, thimble inner cone 21 height H of said air bleeding valve thimble 2 front ends are the 1-3 millimeter; Wherein, be provided with an anti-taper hole 22 at said air bleeding valve thimble 2 tops.
Further preferred embodiment, thimble inner cone 21 height H of air bleeding valve thimble 2 front ends are the 2-2.7 millimeter.
As the best embodiment of the present invention, thimble inner cone 21 height H of air bleeding valve thimble 2 front ends are 2.5 millimeters.
Also need to prove; The situation of only schematically having drawn three dowels among the present embodiment figure; Certainly, the number of dowel can also be other numbers, as long as adopt exhaust valve to be connected through dowel with the air bleeding valve thimble; Between adjacent dowel, forming the structure of steam vent, all is protection scope of the present invention.
Embodiment 2:
Present embodiment discloses a kind of method for preparing the pressure cooker air bleeding valve, may further comprise the steps:
(1) with powder metallurgy raw material mixed preparing according to a certain percentage, said powder metallurgy raw material comprises the auxiliary agent that 0.5-1.2% is heavy and the iron powder or the stainless steel powder of surplus; Wherein, said iron powder is water smoke iron powder or reduced iron powder, and said reduced iron powder is apparent density>=2.40/g.cm
-3, flow velocity>=2.40/s. (50)
-1, compressibility>=2.40/g.cm
-3Wherein, preferred water smoke iron powder, because of its processability better; Said auxiliary agent can be selected little wax powder or zinc stearate; Wherein, preferred little wax powder, better because of its mouldability, probably about 1%, the scrappage that adopts zinc stearate is probably about 10% for the scrappage that adopts little cured powder; Wherein, auxiliary agent preferred proportion in said powder metallurgy raw material is 0.8-1%;
(2) the powder metallurgy raw material that step (1) is prepared is encased in the prefabricated mould, and mode transfer and compression moulding; As shown in Figure 4, be a kind of mould structure sketch map of the present invention, comprise first mould 71, second mould 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 product structure of the present invention, can also produce other various moulds according to prior art;
(3) product with preparation in the step (2) carries out sinter molding;
(4) product of preparation carries out antirust processing in the step (3), and said antirust processing comprises turn black antirust processing or electroplate antirust processing of pre-oxidation.
Embodiment 3:
In order to increase intensity of the present invention and wearability, different composition and the proportionings that are the powder metallurgy raw material of present embodiment and embodiment 2, it comprises: the copper powder that the auxiliary agent that 0.5-1.2% is heavy, 0.2-2.5% are heavy and the iron powder of surplus.
Embodiment 4:
In order to increase intensity of the present invention and wearability, different composition and the proportionings that are the powder metallurgy raw material of present embodiment and embodiment 2, it comprises: the carbon dust that the auxiliary agent that 0.5-1.2% is heavy, 0.2-1% are heavy and the iron powder of surplus.
Embodiment 5:
In order further to increase intensity of the present invention and wearability; Different composition and the proportionings that are the powder metallurgy raw material of present embodiment and embodiment 2, it comprises: the carbon dust that the auxiliary agent that 0.5-1.2% is heavy, copper powder, 0.2-1% that 0.2-2.5% is heavy are heavy and the iron powder of surplus.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the embodiment of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on the specific embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. pressure cooker air bleeding valve, the air bleeding valve thimble (2) that comprises exhaust valve (1) and be arranged at said exhaust valve (1) inner chamber is characterized in that:
Between the outer circle wall of the inner peripheral wall of said exhaust valve (1) and said air bleeding valve thimble (2), be provided with many dowels (5), the space between adjacent two dowels (5) forms steam vent;
Said exhaust valve (1), air bleeding valve thimble (2) and dowel (5) are one-body molded through powder metallurgical technique;
The thimble inner cone (21) of said air bleeding valve thimble (2) front end highly is the 1-3 millimeter.
2. pressure cooker air bleeding valve according to claim 1 is characterized in that:
The thimble inner cone (21) of said air bleeding valve thimble (2) front end highly is the 2-2.7 millimeter.
3. pressure cooker air bleeding valve according to claim 1 is characterized in that:
The thimble inner cone (21) of said air bleeding valve thimble (2) front end highly is 2.5 millimeters.
4. pressure cooker air bleeding valve according to claim 1 is characterized in that:
Be provided with an anti-taper hole (22) at said air bleeding valve thimble (2) top.
5. a method for preparing the said pressure cooker air bleeding valve of claim 1 is characterized in that, may further comprise the steps:
(1) with powder metallurgy raw material mixed preparing according to a certain percentage, said powder metallurgy raw material comprises the auxiliary agent that 0.5-1.2% is heavy and the iron powder or the stainless steel powder of surplus;
(2) the powder metallurgy raw material that step (1) is prepared is encased in the prefabricated mould, and mode transfer and compression moulding;
(3) product with preparation in the step (2) carries out sinter molding.
6. preparation method according to claim 5 is characterized in that:
After said step (3), also comprise antirust treatment step, said antirust processing comprises turn black antirust processing or electroplate antirust processing of pre-oxidation.
7. preparation method according to claim 5 is characterized in that:
Also include in copper powder and the carbon dust one or both in the said powder metallurgy raw material;
The addition of said copper powder is the 0.2-2.5% of said powder metallurgy raw material gross weight;
The addition of said carbon dust is the 0.2-1% of said powder metallurgy raw material gross weight.
8. preparation method according to claim 5 is characterized in that:
Said iron powder is water smoke iron powder or reduced iron powder or stainless steel powder;
The specification of said reduced iron powder is apparent density>=2.40/g.cm
-3, flow velocity>=2.40/s. (50)
-1, compressibility>=2.40/g.cm
-3
9. preparation method according to claim 5 is characterized in that:
Said auxiliary agent is 0.8-1% in ratio described in the said powder metallurgy raw material;
Said auxiliary agent is little wax powder or zinc stearate.
10. preparation method according to claim 9 is characterized in that:
Said auxiliary agent is little 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 true CN102727077A (en) | 2012-10-17 |
| CN102727077B CN102727077B (en) | 2016-06-15 |
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Family Applications (1)
| 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521757A (en) * | 2013-10-22 | 2014-01-22 | 东南大学 | Powder metallurgy iron copper-based oiliness antifriction material containing rare earth oxides and preparing method |
| 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 |
| 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 |
| 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 |
-
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 |
Cited By (4)
| 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 |
| CN103521757A (en) * | 2013-10-22 | 2014-01-22 | 东南大学 | Powder metallurgy iron copper-based oiliness antifriction material containing rare earth oxides and preparing method |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102727077B (en) | 2016-06-15 |
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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 |