CN102518906B - Installation method for the plastic blind flange of sealing pipe - Google Patents
Installation method for the plastic blind flange of sealing pipe Download PDFInfo
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- CN102518906B CN102518906B CN201110456936.1A CN201110456936A CN102518906B CN 102518906 B CN102518906 B CN 102518906B CN 201110456936 A CN201110456936 A CN 201110456936A CN 102518906 B CN102518906 B CN 102518906B
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Abstract
The installation method of a kind of plastic blind flange for sealing pipe, uses small dimension plastic screw, nut and steel large washer to install blind flange.After can ensure that installation, one end of screw rod is concordant with nut.When blind flange dismantled by needs, two nuts can be back-outed from screw rod, convenient disassembly.And screw rod and nut material are plastics, low price, it is simple to reclaim.The bolt of specification of the same race, nut, large washer can supporting various specifications blind flange, have compressed specification quantity, it is simple to management.
Description
Technical field
The present invention relates to ship pipe fabrication and installation, particularly the installation method of a kind of plastic blind flange for sealing pipe, can be used for the sealing after ship pipe processing and segmentation advance fitting-out.
Background technology
Before this, after the tube section advance fitting-out of boats and ships, before entering Painting Shop sand washing, with steel bolt and nut, plastic blind flange is arranged on pipe ends flange.This method has the disadvantage in that
1, owing to blind flange specification is numerous, needing matching used bolt specification also many, management difficulty is bigger.It is difficult to ensure that bolt end is concordant with nut after installing.Sometimes bolt can stretch out nut (see Fig. 1), and in this case, in painting operation, bolt end screw thread, contamination is painted, and when causing needing dismounting blind flange in follow-up work, nut cannot be pulled down.Sometimes for dismounting blind flange, use gas cutting means to prescind bolt, the damage of bolt, nut and blind flange can be caused again.
2, owing to bolt and nut material is steel, heavier-weight, it is inconvenient and relatively costly to reclaim.
3, concave blind flange adopts injection molding manner manufacture, and cost is lower than flat blind flange, and owing to pipe flange specification is too many, die cost is higher, and the use scope therefore expanding concave blind flange is an effective way reducing cost.It is computed, if pipe flange is identical with blind flange screw number, during screw pitch diameter difference 5mm, can install with the bolt of little a grade, but owing to screw misplaces (see Fig. 2), sometimes the turret head of bolt and nut can not all hide screw, cause Tightening moment uneven, and effect is installed in impact.
Summary of the invention
It is an object of the invention to overcome difficulty and the defect of above-mentioned prior art, it is provided that the installation method of a kind of plastic blind flange for sealing pipe, it is ensured that after installation, one end of screw rod is concordant with nut.When blind flange dismantled by needs, two nuts can be back-outed from screw rod, convenient disassembly.And screw rod and nut material are plastics, low price, it is simple to reclaim.The bolt of specification of the same race, nut, large washer can supporting various specifications blind flanges.Have compressed specification quantity, it is simple to management.
The technical solution of the present invention is as follows:
The installation method of a kind of plastic blind flange for sealing pipe, is characterized in that the method comprises the following steps:
1. the specification apolegamy plastic blind flange according to the terminal port flange treating sealing pipe, apolegamy plastics small screw and the plastics primary nut that matches of this plastics small screw and steel small dimension large washer；The external diameter of described plastics small screw is not more than the aperture of the connecting screw hole of described plastic blind flange, and the external diameter of described steel large washer should be greater than the diameter of the connecting screw hole of described plastic blind flange；
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, the end face making the first end of screw rod is concordant with the end face of nut, then on this screw rod, overlap a large washer, this screw rod inserts the screw of pipe flange and blind flange again, and the nut on hand-held screw rod pushes large washer to flange, so as to be close to flange, and adjust screw position, make large washer, screw rod and flange screw be on same axis；
3. large washer is enclosed within the other end of described screw rod, then another nut is screwed into from the other end of this screw rod, adjust blind flange and large washer position, make screw on blind flange, large washer and screw rod be on same axis, then tighten another nut；
4. the first end position of screw rod is checked, as found, screw rod first end is not concordant with nut, then need the relative position adjusting two end nuts with screw rod, step is: slightly loosen the nut of the partially long one end of screw rod, adjust the nut of described screw rod first end, the end face making described screw rod first end is concordant with the end face of described nut, then tightens other end nut；
5. repeat step 2. 3. 4., install remaining screw rod, large washer and nut, namely complete to install.
The technique effect of the present invention is as follows:
1, the present invention adopts plastic screw, nut and steel large washer to install reaching on the flange being arranged on pipe port of described plastic blind flange outside effect same with steel bolt and nut, moreover it is possible to play following effect:
A () is able to ensure that one end of screw rod is concordant with nut, or retraction nut, and when needing to pull down blind flange after sand washing, on screw rod, two nuts can screw off from screw rod；
B () bolt and nut specification diminishes, material is plastics.Use the cost of a plastics small screw, two plastics primary nuts and two steel small dimension large washers, lower than the cost of a steel king-bolt and a steel big nut, and be easy to reclaim.
C () compliant compression, uses same specification one harness fastener to be applicable to plurality of specifications blind flange, it is simple to management；
D () can install the plastic blind flange differing 5mm with pipe flange screw pitch diameter.
2, the securing member of the present invention is plastic screw, plastic nut, and its physical dimension meets national standard.Wherein screw rod standard is GB/T15389-1994, and the standard No. of nut is GB/T6170-2000.The large washer standard No. additionally needed is GB/T96.1-2002.
3, screw rod, nut can manufacture with injection molding manner, it is also possible to machining mode manufactures.Large washer can be purchased to market.
4, handling are all more convenient, and after blind flange is installed, through sand washing, application, nut remains to back out, and dismantle without influence on blind flange.
Accompanying drawing explanation
Fig. 1 is that existing bolt and nut installs blind flange, and bolt end stretches out the situation schematic diagram of nut sometimes.
The situation schematic diagram that Fig. 2 is existing pipe flange to misplace with the screw of blind flange.
Fig. 3 is that large washer is close to flange, and large washer, screw rod and flange screw are in the schematic diagram on same axis.
Fig. 4 is the relative position adjusting two end nuts with screw rod, ensures the schematic diagram that one end external thread of screw is concordant with nut after fastening.
Fig. 5 is the view after the blind flange installation of screw dislocation-free.
Fig. 6 is the view after the blind flange installation of screw dislocation
Fig. 7 is the process schematic pulling down blind flange.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but not should with this limit the present invention will not scope.
1, the installation method of a kind of plastic blind flange for sealing pipe, the method comprises the following steps:
1. the specification apolegamy plastic blind flange according to the terminal port flange treating sealing pipe, apolegamy plastics small screw and the plastics primary nut that matches of this plastics small screw and steel small dimension large washer；The external diameter of described plastics small screw is not more than the aperture of the connecting screw hole of described plastic blind flange, and the external diameter of described steel large washer should be greater than the diameter of the connecting screw hole of described plastic blind flange；
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, the end face making the first end of screw rod is concordant with the end face of nut, then overlapping a large washer then the screw by this screw rod insertion pipe flange and blind flange on this screw rod, the nut on hand-held screw rod pushes large washer to flange, so as to be close to flange, and adjust screw position, make large washer, screw rod and flange screw be on same axis, as shown in Figure 3；
3. large washer is enclosed within the other end of described screw rod, then another nut is screwed into from the other end of this screw rod, adjust blind flange and large washer position, make screw on blind flange, large washer and screw rod be on same axis, then tighten another nut；
4. the first end position of screw rod is checked, as found, screw rod first end is not concordant with nut, then need the relative position adjusting two end nuts with screw rod, step is: slightly loosen the nut of the partially long one end of screw rod, adjust the nut of described screw rod first end, the end face making described screw rod first end is concordant with the end face of described nut, then tightens other end nut, adjusts process schematic and sees Fig. 4；
5. repeat step 2. 3. 4., install remaining screw rod, large washer and nut, namely complete to install.State after installation such as Fig. 5.
When pipe flange differs 5mm with blind flange screw pitch circle, screw axis is the centrage of screw lap, sees accompanying drawing 2, and installation steps are ibid.State after the blind flange installation of screw dislocation is shown in Fig. 6.
The material of same specification can substitute for plurality of specifications bolt.Such as can replace M12, M16, M20 bolt with M10 screw rod, as long asLarge washer can cover M12, M16, M20 bolt place screw overlapping more than the 2mm of energy.
Tube section advance fitting-out terminates, and after sand washing application, it is necessary to pull down blind flange, blind flange can be pulled down according to the following steps:
A () backs out the nut that screw rod end is concordant, and take off the large washer leaned on mutually with this nut；
B () pinches other end nut, extract screw rod out, and take off large washer；
C nut is backed out after removing by () fastener package from screw rod, as there is paint the screw rod end near nut, it is impossible to when backing out nut, then change nut direction of rotation, make nut back out from the screw rod other end；
Paint on (d) cleaning screw rod；
E () takes off blind flange, send screw rod, nut, large washer, blind flange back to warehouse after reclaiming.
The process pulling down blind flange is shown in accompanying drawing 7.
Experiments show that:
1, present invention screw rod replaces bolt.Nut location adjustable due to screw rod two end, it is ensured that after blind flange is installed, certainly have a nut concordant with screw rod end face, this end of screw rod will not affect back-out because spraying paint.And from then on other end nut can also be held and back-out.
2, present invention small dimension screw rod, nut replace original bolt, nut.Bolt and nut material is low price, the plastics that proportion is less, and specification is less than the original bolt and nut used.
3, the specification of plastic screw, nut and steel large washer is selected.After the length of plastic screw can ensure that installation, one end is concordant with nut, the other end slightly stretches out nut or concordant with nut, and the inner circle of large washer is mated with screw rod, and cylindrical can hide screw, be not less than 2mm overlapping with flange or blind flange one side, and do not touch the weld seam between pipe and flange.
Use small dimension plastic screw, nut and steel large washer that the comparison of blind flange and original use standard specifications bolt, nut installation blind flange is installed, in Table 1.
Table 1
Claims (1)
1., for an installation method for the plastic blind flange of sealing pipe, it is characterized in that the method comprises the following steps:
1. according to the specification apolegamy plastic blind flange treating sealing pipe flange, apolegamy plastics small screw and the plastics primary nut that matches of this plastics small screw and the steel packing ring that matches with this plastics small screw；The external diameter of described plastics small screw is not more than the aperture of the connecting screw hole of described plastic blind flange, and the external diameter of described steel packing ring should be greater than the aperture of the connecting screw hole of described plastic blind flange；
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, the end face making the first end of screw rod is concordant with the end face of nut, then on this screw rod, overlap a steel packing ring, this screw rod inserts the screw of pipe flange and blind flange again, and the nut on hand-held screw rod pushes steel packing ring to blind flange, so as to be close to blind flange, and adjust screw position, make steel packing ring, screw rod and blind flange screw be on same axis；
3. by the another steel gasket sleeve other end at described screw rod, again another nut is screwed into from the other end of this screw rod, adjust blind flange and another steel gasket position, make screw on blind flange, another steel packing ring and screw rod be on same axis, then tighten another nut；
4. the first end position of screw rod is checked, end face such as the nut of the end face with first end that find screw rod first end is not concordant, then need the relative position adjusting two end nuts with screw rod, step is: slightly loosen another nut, adjust the nut of described screw rod first end, the end face making described screw rod first end is concordant with the end face of the nut of described first end, then tightens another nut；
5. repeat step 2. 3. 4., install remaining screw rod, steel packing ring and nut, namely complete to install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456936.1A CN102518906B (en) | 2011-12-30 | 2011-12-30 | Installation method for the plastic blind flange of sealing pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456936.1A CN102518906B (en) | 2011-12-30 | 2011-12-30 | Installation method for the plastic blind flange of sealing pipe |
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| Publication Number | Publication Date |
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| CN102518906A CN102518906A (en) | 2012-06-27 |
| CN102518906B true CN102518906B (en) | 2016-06-29 |
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| CN201110456936.1A Active CN102518906B (en) | 2011-12-30 | 2011-12-30 | Installation method for the plastic blind flange of sealing pipe |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911605A (en) * | 2015-06-26 | 2015-09-16 | 太阳鸟游艇股份有限公司 | Anticorrosion device for pipelines of yacht |
| CN106641511B (en) * | 2016-11-24 | 2019-07-05 | 沪东中华造船(集团)有限公司 | A kind of pipe protection installation method of plastic blind flange |
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| CN201723902U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | General axial compensator |
| DE202010015931U1 (en) * | 2010-11-30 | 2011-03-24 | Aws Apparatebau Arnold Gmbh | Check gate device |
| CN201875352U (en) * | 2010-11-16 | 2011-06-22 | 江苏新恒基重工有限公司 | Hot extrusion molding branch pipe hydrostatic test pipe orifice sealing device |
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2011
- 2011-12-30 CN CN201110456936.1A patent/CN102518906B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201056588Y (en) * | 2007-04-06 | 2008-05-07 | 上海外高桥造船有限公司 | Sacrificial anode |
| CN201401603Y (en) * | 2009-05-08 | 2010-02-10 | 常州市环球冷却设备有限公司 | UPVC pipe self-tightening choke plug |
| CN101690872A (en) * | 2009-10-26 | 2010-04-07 | 刘友宏 | High-pressure water injection mixer |
| CN101852069A (en) * | 2010-02-09 | 2010-10-06 | 西南石油大学 | Supporting rotating control head of underbalanced coal bed methane well drilling |
| CN201723902U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | General axial compensator |
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| DE202010015931U1 (en) * | 2010-11-30 | 2011-03-24 | Aws Apparatebau Arnold Gmbh | Check gate device |
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