CN101332378A - Compression inner lining polytetrafluorethylene filter and production method thereof - Google Patents
Compression inner lining polytetrafluorethylene filter and production method thereof Download PDFInfo
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- CN101332378A CN101332378A CNA2007101114724A CN200710111472A CN101332378A CN 101332378 A CN101332378 A CN 101332378A CN A2007101114724 A CNA2007101114724 A CN A2007101114724A CN 200710111472 A CN200710111472 A CN 200710111472A CN 101332378 A CN101332378 A CN 101332378A
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Abstract
The invention relates to a filter for mould pressing and inner lining polyfluortetraethylene and a manufacturing method thereof. The filter takes the polyfluortetraethylene as an inside lining, and the outside layer of the filter is provided with a pipeline of the filter; the inside lining of a polyfluortetraethylene layer takes a ring shape, is not provided with an interface and is arranged inside the pipeline of the filter. The pipeline of the filter is a Y typed pipeline of the filter or basket typed pipeline of the filter. The method for manufacturing the polyfluortetraethylene layer adopts the technique of mould pressing once-through shape, which firstly extrudes polyfluortetraethylene powder for molding, and then cooling treatment of the outer wall of the pipeline of the filter is carried out; finally, the sealing position between the outer wall of the pipeline of the filter and the outside is processed into the required size by a shaping lathe. The filter manufactured by method not only has high thermal stability and strong resistance to chemical attack, but also is good in dielectric property; the filter can prevent the pipeline from being eroded and avoid the fluid being polluted; at the same time, the polyfluortetraethylene layer which is ring shape without interface can protect the filter from being cracked.
Description
Technical field
The present invention relates to a kind of filter, especially a kind of filter of compression inner lining polytetrafluorethylefilter.
Background technology
Filter is the device that the tubing of pumped (conveying) medium can not lack, usually be installed in the entrance point of pressure-reducing valve, relief valve, Valve for keeping constant water level or tubing pump, be used for eliminating the impurity in the medium, the filter of cast iron materials commonly used on the market, can not bear the corrosion of strong acid and strong base for a long time, the more important thing is that iron or stainless steel can produce metal ion under the soda acid liquid effects, thereby influence the material composition.The domestic test of seeing useful perfluoroethylene-propylene liner, although can bear deep-etching, resistance to elevated temperatures is poor, can only bear the temperature below 150 ℃, can not satisfy the instructions for use of high temperature fluid, and the price of perfluoroethylene-propylene is more than 3 times of polytetrafluoroethylene (PTFE) price.
The filter inner liner, if not integral one-step molding, but the words of overlap joint, cracking phenomena can take place in lap position after using a period of time, will cause fluid permeability to the filter pipeline, causes the corrosion of filter pipeline, this filter is scrapped, increased fluid resistance.
Summary of the invention
Perishable in order to solve under the condition of strong acid and strong base filter, and may produce metal ion and contaminated feedstock, and the situation of the corrosion-resistant non-refractory again of part material, the invention provides a kind of filter of compression inner lining polytetrafluorethylefilter, it is liner with the polytetrafluoroethylene (PTFE), and skin is the filter pipeline, and described polytetrafluoroethylene floor liner is an annular, no interface is built in the filter pipeline.
Described filter pipeline is y-type filter pipeline or basket filter pipeline.
In order to make polytetrafluoroethylene floor and filter pipeline close fit, and polytetrafluoroethylene floor one-shot forming, polytetrafluoroethylene floor is by following method manufacturing among the present invention: the mold pressing one-shot forming technique is adopted in the manufacturing of polytetrafluoroethylene floor, with the filter pipeline is external mold, the pressurising leather bag is an internal mold, middle filled polytetrafluoroethylene powder, after the sealing,, make the polytetrafluorethylepowder powder extrusion modling to the leather bag pressurization, remove sealing, after the shell that liner is intact places a period of time of heating in the high temperature furnace, add sealing again, in shell, add water, water at high temperature produces pressure, when pressure reaches certain numerical value, in its filter tube pipeline outer wall water spray cooling, after cooling off fully, remove sealing, internal and external walls and extraneous sealing place are got final product by the size of shaping machined into to demand.
It is described that to make the pressure of polytetrafluorethylepowder powder extrusion modling be 11-12MPa.
Described place to heat in the high temperature furnace be heated to 380-400 ℃ in the thermostatic drying chamber, constant temperature 6 hours for placing one section the time.
The pressure value that described water at high temperature produces is 2MPa.
Because polytetrafluoroethylene (PTFE) is a perfluorinate straight chain high polymer; strong fluorine carbon bond during it constitutes makes its dielectric properties with higher heat endurance, excellence, reaches best chemical resistance; can prevent effectively that pipeline is subjected to the burn into fluid and is polluted, and polytetrafluoroethylene floor annular, no interface can protect filter can not ftracture.
Description of drawings
Below in conjunction with drawings and embodiments the present invention is described in further detail
Fig. 1 is the structural representation of y-type filter among the present invention.
Fig. 2 is the structural representation of basket filter among the present invention.
Fig. 3 is the polytetrafluoroethylene floor shaping schematic view of y-type filter among the present invention.
Fig. 4 is the polytetrafluoroethylene floor shaping schematic diagram of y-type filter of the present invention.
The specific embodiment
Fig. 1 is the structural representation of y-type filter among the present invention, and 1 be the filter pipeline of y-type filter, and 2 be polytetrafluoroethylene floor, and 3 is sealing plate, and polytetrafluoroethylene floor 2 is annular, and no interface is lining in filter tube road 1 in tight.
Fig. 2 is the structural representation of basket filter among the present invention, and 1 be the filter pipeline of basket filter, and 2 be polytetrafluoroethylene floor, and polytetrafluoroethylene floor 2 is annular, and no interface is lining in filter tube road 1 in tight.
Fig. 3 is the polytetrafluoroethylene floor shaping schematic view of y-type filter among the present invention, polytetrafluoroethylene floor 2 adopts the mold pressing one-shot forming technique, claim equal-pressure method again, production with the polytetrafluoroethylene floor 2 of y-type filter is example, filter pipeline 1 with y-type filter is an external mold, leather bag 5 is prefabricated into the Y type, leather bag 5 built-in wooden or plastics core rods, make it and y-type filter pipeline 1 coupling, gap between leather bag 5 and the filter pipeline 1 is not less than 20mm, in the gap of leather bag 5 and filter pipeline 1 evenly behind the filled polytetrafluoroethylene powder, seal plate 3, wherein have water filling port 4 to lead in the leather bag 5 on the cover plate 3, adopt the high pressure relief pump to water filling, reach 12MPa to leather bag 5 internal pressures, constant voltage is after a period of time, and pressure release removes seal cover 3 and leather bag 5, the filter pipeline 1 of this inner liner polytetrafluoroethylene layer 2 placed be heated to 380-400 ℃ in the thermostatic drying chamber, constant temperature 6 hours.
As shown in Figure 4, under high-temperature situation, add a cover cover plate 3, tighten sealing, wherein a cover plate 3 has water filling port 4, inject water from these water filling port 4 usefulness hydraulic test pumps, water vapor produces pressure, be forced into 2MPa after, in its filter pipeline 1 outer wall water spray cooling, after cooling fully, remove seal cover board 3, get final product with internal and external walls and with size that extraneous sealing place is machined to demand.
The inner liner polytetrafluoroethylene layer of the production method of basket inner liner polytetrafluoroethylene layer and y-type filter is identical.
Claims (6)
1. the filter of a compression inner lining polytetrafluorethylefilter, it is liner with the polytetrafluoroethylene (PTFE), skin is the filter pipeline, it is characterized in that: described polytetrafluoroethylene floor liner is annular, and no interface is built in the filter pipeline.
2. filter according to claim 1 is characterized in that: described filter pipeline is y-type filter pipeline or basket filter pipeline.
3. method of making the described filter of claim 1, comprise the manufacturing of filter pipeline, the manufacturing of polytetrafluoroethylene floor, it is characterized in that: the mold pressing one-shot forming technique is adopted in the manufacturing of described polytetrafluoroethylene floor, with the filter pipeline is external mold, the pressurising leather bag is an internal mold, middle filled polytetrafluoroethylene powder, after the sealing,, make the polytetrafluorethylepowder powder extrusion modling to the leather bag pressurization, remove sealing, after the shell that liner is intact places a period of time of heating in the stove, add sealing again, in shell, add water, water at high temperature produces pressure, when pressure reaches certain numerical value, in its filter tube pipeline outer wall water spray cooling, after cooling off fully, remove sealing, internal and external walls and extraneous sealing place are got final product by the size of shaping machined into to demand.
4. the method for manufacturing filter according to claim 3 is characterized in that: described to make the pressure of polytetrafluorethylepowder powder extrusion modling be 11-12MPa.
5. the method for manufacturing filter according to claim 3 is characterized in that: described place to heat in the high temperature furnace be heated to 380-400 ℃ in the thermostatic drying chamber, constant temperature 6 hours for placing one section the time.
6. the method for manufacturing filter according to claim 3 is characterized in that: the pressure value that described water at high temperature produces is 2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101114724A CN101332378A (en) | 2007-06-25 | 2007-06-25 | Compression inner lining polytetrafluorethylene filter and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101114724A CN101332378A (en) | 2007-06-25 | 2007-06-25 | Compression inner lining polytetrafluorethylene filter and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101332378A true CN101332378A (en) | 2008-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101114724A Pending CN101332378A (en) | 2007-06-25 | 2007-06-25 | Compression inner lining polytetrafluorethylene filter and production method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972563A (en) * | 2010-09-13 | 2011-02-16 | 康庆刚 | Efficient energy-saving filter and filter package formed thereby |
| CN101985996A (en) * | 2010-10-29 | 2011-03-16 | 浙江菲达通球环保管业有限公司 | Process for manufacturing internal and external anti-corrosion polytetrafluoroethylene pipe fitting |
| CN103301664A (en) * | 2013-06-14 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Corrosion-resistant fiber bundle filter unit and method for filtering flue gas desulfurization solution by adopting same |
| CN103301665A (en) * | 2013-06-14 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Net type filter unit and method for filtering flue gas desulfurization solution by using same |
| CN104740928A (en) * | 2014-07-21 | 2015-07-01 | 周鸿钧 | Environment-friendly safe filter |
-
2007
- 2007-06-25 CN CNA2007101114724A patent/CN101332378A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972563A (en) * | 2010-09-13 | 2011-02-16 | 康庆刚 | Efficient energy-saving filter and filter package formed thereby |
| CN101985996A (en) * | 2010-10-29 | 2011-03-16 | 浙江菲达通球环保管业有限公司 | Process for manufacturing internal and external anti-corrosion polytetrafluoroethylene pipe fitting |
| CN101985996B (en) * | 2010-10-29 | 2012-06-13 | 浙江菲达通球环保管业有限公司 | Process for manufacturing internal and external anti-corrosion polytetrafluoroethylene pipe fitting |
| CN103301664A (en) * | 2013-06-14 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Corrosion-resistant fiber bundle filter unit and method for filtering flue gas desulfurization solution by adopting same |
| CN103301665A (en) * | 2013-06-14 | 2013-09-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Net type filter unit and method for filtering flue gas desulfurization solution by using same |
| CN104740928A (en) * | 2014-07-21 | 2015-07-01 | 周鸿钧 | Environment-friendly safe filter |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081231 |