CN105334305A - Porous member - Google Patents
Porous member Download PDFInfo
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- CN105334305A CN105334305A CN201410333062.4A CN201410333062A CN105334305A CN 105334305 A CN105334305 A CN 105334305A CN 201410333062 A CN201410333062 A CN 201410333062A CN 105334305 A CN105334305 A CN 105334305A
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- porous member
- peripheral part
- core
- explosion
- blank
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Abstract
The invention relates to a porous member, and more specifically relates to a porous member for forming a ventilating window of an explosion-proof housing. According to an embodiment of the invention, the porous member made of a porous material includes a peripheral portion and a center portion surrounded by the peripheral portion; the peripheral portion of the porous member has decreased thickness due to extrusion, so that the peripheral portion of the porous member is denser than the central portion of the porous member. The invention also relates to a method for producing the porous member and a method for sealing binding of the porous member to an explosion-proof housing.
Description
Technical field
The present invention relates to porous member, relate more specifically to the porous member of the transom for the formation of explosion-proof casing.The invention still further relates to for the manufacture of the method for porous member and the method for porous member sealed junction being incorporated into explosion-proof casing.
Background technology
The device used in explosive gas atmosphere needs to adopt Explosion-proof Design.Such as, for combustible gas sensor, it is placed in explosion-proof casing usually.This explosion-proof casing has transom, pass transom and enter explosion-proof casing, thus combustible gas sensor can detect gas to allow gas.Transom is formed by porosint usually.In the prior art, transom is formed by the opening that the agglomerate of porous is sintered to explosion-proof casing.But this sintering processing makes the height of device be difficult to reduce, and the microminiaturization for implement device is disadvantageous.In order to the problem of solving device microminiaturization, Chinese patent application CN201210367286.8 proposes to replace porous sintered piece with thin wire gauze, is fusion welded on the opening of explosion-proof casing by wire gauze by welding process.But the shortcoming of welding technology is to ensure that explosion-proof casing meets explosion-proof criteria.Come for the explosion-proof casing of weld metal silk screen for employing welding technology, the sampling test of 100% must be carried out before being delivered for use, this substantially prolongs the product delivery time and add cost.
In order to overcome the shortcoming of melting welding, soldering processes are adopted to be incorporated on explosion-proof casing by wire gauze sealed junction.But the shortcoming that conventional braze technique is used for wire gauze welding is that join domain exists the uncontrollable gap of size and location, makes gas and flame may pass from gap, causes an explosion accident.Another shortcoming of conventional braze technique is that brazing material is easy to due to the capillary action of wire gauze flow in the central permeable part of wire gauze, thus causes less desirable blocking.
Summary of the invention
The present invention is intended to the one or more defects solving prior art, and it is achieved by the following technical programs.
In one aspect of the invention, provide a kind of porous member be made of porous materials, described porous member comprise peripheral part and by described peripheral part around core, wherein, owing to being extruded, thickness reduces the peripheral part of described porous member, thus makes the peripheral part of described porous member more closely knit than the core of described porous member.
In one embodiment, described porous member is the circular or oval flat member of rectangle.
In one embodiment, described porosint is wire gauze.
In one embodiment, described core protrudes from described peripheral part on the end face of described porous member, and described core flushes with described peripheral part on the bottom surface of described porous member.
In one embodiment, described core all protrudes from described peripheral part on the end face and bottom surface of described porous member.
In one embodiment, the air penetrability of the core of described porous member is 40%-90%, and the air penetrability of the peripheral part of described porous member is 0-30%.
In another aspect of the present invention, provide a kind of method for the manufacture of porous member, described method comprises: provide the blank be made of porous materials, described blank comprise peripheral part and by described peripheral part around core; And the peripheral part of described blank is extruded and obtains described porous member, make the peripheral part of obtained porous member more closely knit than core.
In another aspect of the present invention, provide a kind of method for porous member sealed junction being incorporated into explosion-proof casing, described method comprises: provide the blank be made of porous materials, described blank comprise peripheral part and by described peripheral part around core; The peripheral part of described blank extruded and obtains described porous member, making the peripheral part of obtained porous member more closely knit than core; The explosion-proof casing with opening is provided; Brazing material is applied to around described opening; Described porous member is covered described opening, makes the peripheral part of described porous member contact with described brazing material and the core of described porous member is not contacted with described brazing material; And execution brazing process, make described porous member be incorporated into described explosion-proof casing by sealed junction.
In one embodiment, the percentage by weight of the boron in described brazing material is less than or equal to 3%.
In one embodiment, the percentage by weight of the solid constituent in described brazing material is 60%-96%, is more preferably 82%-96%.
Accompanying drawing explanation
Also consider accompanying drawing by referring to the following detailed description and claim simultaneously, more complete understanding can be had to the present invention and other advantages that the present invention has can be recognized.In whole accompanying drawing, identical Reference numeral represents identical element.In the accompanying drawings:
Fig. 1 schematically shows an embodiment according to porous member of the present invention;
Fig. 2 schematically shows another embodiment according to porous member of the present invention;
Fig. 3 schematically shows the process flow diagram according to the method for the manufacture of porous member of the present invention;
Fig. 4 schematically shows the process flow diagram according to the method for porous member sealed junction being incorporated into explosion-proof casing of the present invention;
Fig. 5 shows the schematic diagram of explosion-proof casing according to an embodiment of the invention;
Fig. 6 schematically shows the view after porous member and explosion-proof casing are assembled; And
Fig. 7 schematically shows the parameatal brazing material being applied to explosion-proof casing.
Embodiment
In one aspect of the invention, a kind of porous member be made of porous materials is provided.Fig. 1 and Fig. 2 shows the schematic diagram according to porous member of the present invention.
Fig. 1 schematically shows an embodiment according to porous member of the present invention.In the embodiment shown in fig. 1, porous member 100 is approximate rectangular flat members, and its four bights are fillets.Those skilled in the art will appreciate that porous member 100 also can have any other suitable shape as required, such as circular, ellipse, polygon etc.Because porous member 100 is made of porous materials, so porous member 100 is ventilative.Usually, the air penetrability for the formation of the porosint of porous member 100 is 40%-90%, such as 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%.Those skilled in the art will appreciate that the porosint for the formation of porous member 100 also can have any other suitable air penetrability as required.In one embodiment, the porosint for the manufacture of porous member 100 can be wire gauze.Those skilled in the art will appreciate that and any other suitable porosint also can be used to manufacture porous member 100.
Porous member 100 can be formed by extruding by the blank 101 of porosint.Blank 101 comprise peripheral part 102 and by peripheral part 102 around core 104.The original depth of blank 101 is T
1.The peripheral part 102 of blank 101 is extruded and makes thickness from T
1be reduced to T
2, and the thickness of the core 104 of blank 101 still remains T
1.It is T that the porous member 100 that process extruding obtains comprises thickness
2peripheral part 102 and thickness be T
1core 104.As shown in Figure 1, the thickness T of the peripheral part 102 of porous member 100 can be seen
2be less than the thickness T of the core 104 of porous member 100
1.As shown in Figure 1, the core 104 of porous member 100 protrudes from peripheral part 102 on the end face of porous member 100, and the core 104 of porous member 100 flushes with peripheral part 102 on the bottom surface of porous member 100.Peripheral part 102 due to the blank 101 of porous member 100 is extruded and thickness reduces, thus makes the peripheral part 102 of obtained porous member 100 more closely knit than core 104.Because the peripheral part 102 of porous member 100 is more closely knit than the core 104 of porous member 100, thus the air penetrability of the peripheral part 102 of porous member 100 is made to be less than the air penetrability of the core 104 of porous member 100.The peripheral part 102 of porous member 100 is extruded more closely knit, and the air penetrability of the peripheral part 102 of porous member 100 is less.In one embodiment, the air penetrability of the core 104 of porous member 100 is 40-90%, and the air penetrability of the peripheral part 102 of porous member 100 is 0-30%.In one embodiment, the air penetrability of the core 104 of porous member 100 is 50%, and the air penetrability of the peripheral part 102 of porous member 100 is 5%.Those skilled in the art will appreciate that and as required the peripheral part 102 of porous member 100 can be expressed to any suitable compaction rate.
It is favourable for extruding the peripheral part 102 of the blank 101 of porous member 100, and this can make peripheral part 102 consolidation more of obtained porous member 100, thus significantly suppresses the capillary action at peripheral part 102 place of porous member 100.When brazing material is applied to the peripheral part 102 of porous member 100, brazing material is significantly suppressed to the flowing of core 104 due to capillary action.
The extrusion operation of the peripheral part 102 of the blank 101 performed in any suitable manner porous member 100 can be adopted, as long as make the peripheral part 102 of obtained porous member 100 more closely knit than core 104.
Fig. 2 schematically shows another embodiment according to porous member of the present invention.In the embodiment shown in Figure 2, porous member 200 has the shape similar to the porous member 100 of Fig. 1, and the blank 201 for the formation of porous member 200 is also similar to the blank 101 for the formation of porous member 100.Difference is that the core 204 through extruding the porous member 200 obtained all protrudes from peripheral part 202 on the end face and bottom surface of porous member 200, and only on the end face of porous member 100, protrudes from peripheral part 102 through the core 104 extruding the porous member 100 obtained.
In another aspect of the present invention, a kind of method for the manufacture of porous member is provided.Fig. 3 schematically shows the process flow diagram according to the method 300 for the manufacture of porous member of the present invention.
As shown in Figure 3, in step 302, provide the blank 101,201 be made of porous materials, blank 101,201 comprise peripheral part 102,202 and by peripheral part 102,202 around core 104,204.In step 304, the peripheral part 102,202 of the blank 101,201 of porous member 100,200 extruded and obtains porous member 100,200, making the peripheral part 102,202 of obtained porous member 100,200 than core 104,204 more closely knit.
In another aspect of the present invention, a kind of method for porous member sealed junction being incorporated into explosion-proof casing is provided.Fig. 4 schematically shows the process flow diagram according to the method 400 for porous member sealed junction being incorporated into explosion-proof casing of the present invention.
As shown in Figure 4, in step 402, provide the blank 101,201 be made of porous materials, blank 101,201 comprise peripheral part 102,202 and by peripheral part 102,202 around core 104,204.In step 404, the peripheral part 102,202 of the blank 101,201 of porous member 100,200 extruded and obtains porous member 100,200, making the peripheral part 102,202 of obtained porous member 100,200 than core 104,204 more closely knit.In step 406, provide the explosion-proof casing 500 with opening 502.In step 408, brazing material 504 is applied to opening 502 around.In step 410, porous member 100,200 is covered opening 502, the peripheral part 102,202 of porous member 100,200 is contacted with brazing material and the core 104,204 of porous member 100,200 is not contacted with brazing material.In step 412, perform brazing process, make porous member 100,200 be incorporated into explosion-proof casing 500 by sealed junction.
Fig. 5 shows the schematic diagram of explosion-proof casing 500 according to an embodiment of the invention.Explosion-proof casing 500 has opening 502.
Fig. 6 schematically shows the view after porous member 100,200 and explosion-proof casing 500 are assembled.Porous member 100,200 is incorporated into explosion-proof casing 500 by sealed junction and covers opening 502, to form transom.
Fig. 7 schematically shows the brazing material 504 around the opening 502 being applied to explosion-proof casing 500.As shown in Figure 7, brazing material 504 is applied to the region that will contact with the peripheral part 102,202 of porous member 100,200 on explosion-proof casing 500.
In order to reduce the mobility of brazing material further, avoid brazing material to flow to the core of porous member better, the percentage by weight of the boron in brazing material is preferably less than or equal to 3%.
In order to reduce the mobility of brazing material further, avoid brazing material to flow to the core of porous member better, the percentage by weight of the solid constituent in brazing material is preferably 60%-96%, is more preferably 82%-96%.
Although describe the present invention with reference to (one or more) exemplary embodiment, but what it will be understood to those of skill in the art that is, the invention is not restricted to precise structure disclosed herein and ingredient, and when not departing from the spirit and scope of the invention as claims restriction, various amendment, change and distortion can be understood from description above.The present invention is not subject to the restriction of the shown sequence of step, because some steps can be carried out according to different orders and/or carry out with other step simultaneously.Therefore, the invention is not restricted to disclosed (one or more) specific embodiment, but will comprise falling all embodiments within the scope of the appended claims.
Claims (10)
1. the porous member be made of porous materials, comprising:
Peripheral part; With by described peripheral part around core,
Wherein, owing to being extruded, thickness reduces the peripheral part of described porous member, thus makes the peripheral part of described porous member more closely knit than the core of described porous member.
2. porous member as claimed in claim 1, wherein, described porous member is the circular or oval flat member of rectangle.
3. porous member as claimed in claim 1, wherein, described porosint is wire gauze.
4. porous member as claimed in claim 1, wherein, described core protrudes from described peripheral part on the end face of described porous member, and described core flushes with described peripheral part on the bottom surface of described porous member.
5. porous member as claimed in claim 1, wherein, described core all protrudes from described peripheral part on the end face and bottom surface of described porous member.
6. porous member as claimed in claim 1, wherein, the air penetrability of the core of described porous member is 40%-90%, and the air penetrability of the peripheral part of described porous member is 0-30%.
7., for the manufacture of a method for porous member, comprising:
The blank be made of porous materials is provided, described blank comprise peripheral part and by described peripheral part around core; And
The peripheral part of described blank extruded and obtains described porous member, making the peripheral part of obtained porous member more closely knit than core.
8., for porous member sealed junction being incorporated into a method for explosion-proof casing, comprising:
The blank be made of porous materials is provided, described blank comprise peripheral part and by described peripheral part around core;
The peripheral part of described blank extruded and obtains described porous member, making the peripheral part of obtained porous member more closely knit than core;
The explosion-proof casing with opening is provided;
Brazing material is applied to around described opening;
Described porous member is covered described opening, makes the peripheral part of described porous member contact with described brazing material and the core of described porous member is not contacted with described brazing material; And
Perform brazing process, make described porous member be incorporated into described explosion-proof casing by sealed junction.
9. method as claimed in claim 8, wherein, the percentage by weight of the boron in described brazing material is less than or equal to 3%.
10. method as claimed in claim 8, wherein, the percentage by weight of the solid constituent in described brazing material is 60%-96%, is more preferably 82%-96%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333062.4A CN105334305B (en) | 2014-07-14 | 2014-07-14 | Porous member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333062.4A CN105334305B (en) | 2014-07-14 | 2014-07-14 | Porous member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105334305A true CN105334305A (en) | 2016-02-17 |
| CN105334305B CN105334305B (en) | 2020-10-16 |
Family
ID=55284957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410333062.4A Active CN105334305B (en) | 2014-07-14 | 2014-07-14 | Porous member |
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| Country | Link |
|---|---|
| CN (1) | CN105334305B (en) |
Citations (12)
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|---|---|---|---|---|
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| JP2003207108A (en) * | 2002-01-18 | 2003-07-25 | Kaneko Sangyo Kk | Wire mesh flame arrestor |
| CN1486231A (en) * | 2000-11-20 | 2004-03-31 | ����Τ�����ʹ�˾ | Brazing foil preforms and their use in the manufacture of heat exchangers |
| US20060144599A1 (en) * | 2003-06-06 | 2006-07-06 | Christoph Leinemann | Permanently fireproof flame guard |
| CN101101301A (en) * | 2006-07-07 | 2008-01-09 | 住友电装株式会社 | Insert-molded product having porous member and method of producing insert-molded product having porous member |
| CN101157567A (en) * | 2007-09-11 | 2008-04-09 | 江苏科技大学 | Boron-containing titanium-based amorphous solder for braze welding Si3N4 ceramic and preparation method thereof |
| CN101413071A (en) * | 2008-12-05 | 2009-04-22 | 西北有色金属研究院 | Metal polyporous material with gradient pore structure and preparation thereof |
| CN102680163A (en) * | 2011-03-14 | 2012-09-19 | 罗斯蒙德公司 | Flame arrestor for process transmitter |
| CN203280947U (en) * | 2013-06-17 | 2013-11-13 | 安徽理工大学 | Double-core-plate pipeline fire barrier |
| CN104427813A (en) * | 2013-08-27 | 2015-03-18 | R.施塔尔开关设备有限责任公司 | Housing part for a housing with flameproof encapsulation comprising a porous body |
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2014
- 2014-07-14 CN CN201410333062.4A patent/CN105334305B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089548A (en) * | 1992-12-18 | 1994-07-20 | 贝克特股份有限公司 | The porous layer casting die that contains the sintering of metallic fiber |
| FR2782278A1 (en) * | 1998-08-17 | 2000-02-18 | Commissariat Energie Atomique | Anti-explosion device by recombination of hydrogen comprises box with surfaces having catalytic coating for water synthesis |
| CN1209345A (en) * | 1998-09-02 | 1999-03-03 | 冶金工业部钢铁研究总院 | Mirco-aperture fire-retardant anti-explosion component made of sintered metal wire-mesh screen |
| CN1486231A (en) * | 2000-11-20 | 2004-03-31 | ����Τ�����ʹ�˾ | Brazing foil preforms and their use in the manufacture of heat exchangers |
| JP2003207108A (en) * | 2002-01-18 | 2003-07-25 | Kaneko Sangyo Kk | Wire mesh flame arrestor |
| US20060144599A1 (en) * | 2003-06-06 | 2006-07-06 | Christoph Leinemann | Permanently fireproof flame guard |
| CN101101301A (en) * | 2006-07-07 | 2008-01-09 | 住友电装株式会社 | Insert-molded product having porous member and method of producing insert-molded product having porous member |
| CN101157567A (en) * | 2007-09-11 | 2008-04-09 | 江苏科技大学 | Boron-containing titanium-based amorphous solder for braze welding Si3N4 ceramic and preparation method thereof |
| CN101413071A (en) * | 2008-12-05 | 2009-04-22 | 西北有色金属研究院 | Metal polyporous material with gradient pore structure and preparation thereof |
| CN102680163A (en) * | 2011-03-14 | 2012-09-19 | 罗斯蒙德公司 | Flame arrestor for process transmitter |
| CN203280947U (en) * | 2013-06-17 | 2013-11-13 | 安徽理工大学 | Double-core-plate pipeline fire barrier |
| CN104427813A (en) * | 2013-08-27 | 2015-03-18 | R.施塔尔开关设备有限责任公司 | Housing part for a housing with flameproof encapsulation comprising a porous body |
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| CN105334305B (en) | 2020-10-16 |
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