CN102518906A - Mounting method of plastic blind flange for sealing pipe - Google Patents
Mounting method of plastic blind flange for sealing pipe Download PDFInfo
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- CN102518906A CN102518906A CN2011104569361A CN201110456936A CN102518906A CN 102518906 A CN102518906 A CN 102518906A CN 2011104569361 A CN2011104569361 A CN 2011104569361A CN 201110456936 A CN201110456936 A CN 201110456936A CN 102518906 A CN102518906 A CN 102518906A
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- screw rod
- nut
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- blind flange
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Abstract
The invention relates to a mounting method of a plastic blind flange for sealing a pipe, wherein a small plastic screw, nuts and big steel washers are adopted to mount the blind flange; one end of the mounted screw is level with the nuts; the two nuts can both be conveniently screwed out of the screw in case of dismounting the flange; and the screw and the nuts made of plastics have low price and are convenient to recover. The bolts, the nuts and the washers of the same specification can be used mounting the blind flanges of multiple specifications, so as to reduce the specification number and facilitate management.
Description
Technical field
The present invention relates to the fabrication and installation of boats and ships pipe, particularly a kind of installation method that is used for the plastics blind flange that pipe seals can be used for sealing after processing of boats and ships pipe and the segmentation advance fitting-out.
Background technique
Before this, after the pipe segmentation advance fitting-out of boats and ships, advance the sand washing of application workshop before, the plastics blind flange is installed on the pipeline end flange with the steel bolt and nut.There is following shortcoming in this method:
1, because the blind flange specification is numerous, need matching used bolt specification also many, management difficulty is bigger.The bolt end is concordant with nut after being difficult to guarantee to install.Sometimes bolt can stretch out the nut (see figure 1), in this case, through coating operation, is infected with in the bolt end thread and paints, and when causing that needs are dismantled blind flange in follow-up work, nut can't be pulled down.Sometimes in order to dismantle blind flange, use the gas cutting means to prescind bolt, can cause the damage of bolt, nut and blind flange again.
2, because the bolt and nut material is a steel, and weight is heavier, it is higher to reclaim inconvenience and cost.
3, the concave blind flange adopts the injection moulding mode to make, and cost is lower than flat blind flange, because the pipe flange specification is too many, die cost is higher, and the using scope that therefore enlarges the concave blind flange is an effective way that reduces cost.Through calculating, if pipe flange is identical with blind flange screw number, when the screw pitch diameter differs 5mm; Can use little one grade bolt to install, but because screw dislocation (see figure 2), the hexagon head of bolt and nut can not all hide screw sometimes; Cause Tightening moment inhomogeneous, effect is installed in influence.
Summary of the invention
The objective of the invention is to overcome the difficulty and the defective of above-mentioned existing technology, a kind of installation method that is used for the plastics blind flange that pipe seals is provided, it is concordant with nut to guarantee to install end of screw rod, back.When needs dismounting blind flange, two nuts can both be back-outed convenient disassembly from screw rod.And screw rod and nut material be plastics, and low price is convenient to reclaim.The bolt of specification of the same race, nut, large washer can be installed the plurality of specifications blind flange.Compress specification quantity, be convenient to management.
Technical solution of the present invention is following:
A kind of installation method that is used for the plastics blind flange that pipe seals, characteristics are that this method comprises the following steps:
1. according to the specification apolegamy plastics blind flange of the terminal port flange of waiting to seal pipe, apolegamy plastics small screw, the plastics primary nut and the steel small dimension large washer that match with this plastics small screw; The external diameter of described plastics small screw is not more than the aperture of the connection screw of described plastics blind flange, and the external diameter of described steel large washer should be greater than the diameter of the connection screw of described plastics blind flange;
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, make the end face of first end of screw rod concordant with the end face of nut; On this screw rod, put a large washer then; This screw rod is inserted the screw of pipe flange and blind flange, the nut on the hand-held screw rod is pushed large washer to flange, makes it to be close to flange again; And the adjustment screw position, large washer, screw rod and flange screw are on the same axis;
3. large washer is enclosed within the other end of described screw rod, the other end of another nut from this screw rod is screwed into again, adjustment blind flange and large washer position are on the same axis screw on the blind flange, large washer and screw rod, tighten another nut then;
4. check the first end position of screw rod; As find that the screw rod first end is not concordant with nut; Then need adjust the relative position of two end nuts and screw rod, step is: loosening slightly screw rod is grown the nut of an end partially, adjusts the nut of described screw rod first end; Make the end face of described screw rod first end concordant, tighten the other end nut then with the end face of described nut;
5. 2. 3. 4. repeating step installs remaining screw rod, large washer and nut, promptly accomplishes and installs.
Technique effect of the present invention is following:
1, the present invention adopt can reach on plastic screw, nut and steel large washer the flange that is installed in the pipe port described plastics blind flange with outside the steel bolt and nut installation effect same, can also play following effect:
(a) can guarantee that an end of screw rod is concordant with nut, or the retraction nut, in the time of need pulling down blind flange after the sand washing, two nuts can screw off from screw rod on the screw rod;
(b) the bolt and nut specification diminishes, and material is plastics.Use the cost of a plastics small screw, two plastics primary nuts and two steel small dimension large washers, be lower than the cost of a steel king-bolt and a steel big nut, and be convenient to reclaim.
(c) compliant compression uses same specification one harness fastener to be applicable to the plurality of specifications blind flange, is convenient to management;
(d) the plastics blind flange that differs 5mm with pipe flange screw pitch diameter can be installed.
2, fastening piece of the present invention is plastic screw, plastic nut, its physical dimension National standard.Wherein the screw rod standard is GB/T15389-1994, and the standard No. of nut is GB/T6170-2000.The large washer standard No. that need use in addition is GB/T96.1-2002.
3, screw rod, nut can use the injection moulding mode to make, and also available machining mode is made.Large washer can arrive on the market and purchase.
4, loading and unloading are all more convenient, and after blind flange was installed, through sand washing, application, nut still can be backed out, and can not influence the blind flange dismounting.
Description of drawings
Fig. 1 existingly installs blind flange with bolt and nut, and the bolt end is stretched out the situation schematic representation of nut sometimes.
Fig. 2 is the situation schematic representation of the screw dislocation of existing pipe flange and blind flange.
Fig. 3 is that large washer and flange are close to, and large washer, screw rod and flange screw are in the schematic representation on the same axis.
Fig. 4 is the relative position of adjustment two end nuts and screw rod, and fastening back guarantees the end screw rod outside thread schematic representation concordant with nut.
Fig. 5 is the view after the blind flange of screw dislocation-free is installed.
Fig. 6 is the view after the blind flange of screw dislocation is installed
Fig. 7 is a process schematic representation of pulling down blind flange.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described further, but not should with this limit of the present invention can scope.
1, a kind of installation method that is used for the plastics blind flange that pipe seals, this method comprises the following steps:
1. according to the specification apolegamy plastics blind flange of the terminal port flange of waiting to seal pipe, apolegamy plastics small screw, the plastics primary nut and the steel small dimension large washer that match with this plastics small screw; The external diameter of described plastics small screw is not more than the aperture of the connection screw of described plastics blind flange, and the external diameter of described steel large washer should be greater than the diameter of the connection screw of described plastics blind flange;
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, make the end face of first end of screw rod concordant with the end face of nut; On this screw rod, put a large washer then, this screw rod is inserted the screw of pipe flange and blind flange again, the nut on the hand-held screw rod is pushed large washer to flange; Make it to be close to flange; And the adjustment screw position, large washer, screw rod and flange screw are on the same axis, as shown in Figure 3;
3. large washer is enclosed within the other end of described screw rod, the other end of another nut from this screw rod is screwed into again, adjustment blind flange and large washer position are on the same axis screw on the blind flange, large washer and screw rod, tighten another nut then;
4. check the first end position of screw rod; As find that the screw rod first end is not concordant with nut, and then need adjust the relative position of two end nuts and screw rod, step is: loosening slightly screw rod is grown the nut of an end partially; Adjust the nut of described screw rod first end; Make the end face of described screw rod first end concordant with the end face of described nut, tighten the other end nut then, the adjustment process schematic representation is seen Fig. 4;
5. 2. 3. 4. repeating step installs remaining screw rod, large washer and nut, promptly accomplishes and installs.State after the installation such as Fig. 5.
When pipe flange and blind flange screw pitch circle differed 5mm, the screw axis was the center line of screw lap, sees accompanying drawing 2, and installation steps are the same.State after the blind flange of screw dislocation is installed is seen Fig. 6.
The material of same specification can replace the plurality of specifications bolt.
large washer for example can replace M12, M16, M20 bolt, as long as can cover M12, M16, M20 bolt place screw also can be more than the overlapping 2mm with the M10 screw rod.
Pipe segmentation advance fitting-out finishes, and after the sand washing application, need pull down blind flange, can pull down blind flange according to the following steps:
(a) back out the concordant nut in screw rod end, and take off the large washer that nut therewith leans on mutually;
(b) pinch the other end nut, extract screw rod out, and take off large washer;
(c) after fastener package is removed, nut is backed out from screw rod, paint is arranged, in the time of can't backing out nut, then change the nut sense of rotation, nut is backed out from the screw rod the other end like screw rod end near nut;
(d) paint on the cleaning screw rod;
(e) take off blind flange, send screw rod, nut, large washer, blind flange back to warehouse after reclaiming.
Pull down the process of blind flange and see accompanying drawing 7.
Experiment shows:
1, the present invention replaces bolt with screw rod.Because the nut location of screw rod two ends can be adjusted, can guarantee that blind flange is installed after, have a nut concordant certainly with the screw rod end face, this end of screw rod can not back-outed because of spraying to paint to influence.And from then on the other end nut also can be held and back-out.
2, the present invention replaces original bolt, nut with small dimension screw rod, nut.The bolt and nut material is a low price, the plastics that proportion is less, and specification is littler than the original bolt and nut that uses.
3, select the specification of plastic screw, nut and steel large washer for use.It is concordant with nut that the length of plastic screw can guarantee to install back one end; The other end slightly stretches out nut or concordant with nut, the interior circle of large washer and screw rod coupling, and cylindrical can hide screw; With flange or the overlapping 2mm that is not less than of blind flange single face, and do not touch the weld seam between pipe and the flange.
Use small dimension plastic screw, nut and steel large washer installation blind flange and original use standard size bolt, nut that the pluses and minuses contrast of blind flange is installed, see table 1.
Table 1
Claims (1)
1. installation method that is used for the plastics blind flange that pipe seals, characteristics are that this method comprises the following steps:
1. according to the specification apolegamy plastics blind flange of the terminal port flange of waiting to seal pipe, apolegamy plastics small screw, the plastics primary nut and the steel small dimension large washer that match with this plastics small screw; The external diameter of described plastics small screw is not more than the aperture of the connection screw of described plastics blind flange, and the external diameter of described steel large washer should be greater than the diameter of the connection screw of described plastics blind flange;
2. when blind flange and pipe flange screw dislocation-free, nut is screwed in the end of screw rod, make the end face of first end of screw rod concordant with the end face of nut; On this screw rod, put a large washer then; This screw rod is inserted the screw of pipe flange and blind flange, the nut on the hand-held screw rod is pushed large washer to flange, makes it to be close to flange again; And the adjustment screw position, large washer, screw rod and flange screw are on the same axis;
3. large washer is enclosed within the other end of described screw rod, the other end of another nut from this screw rod is screwed into again, adjustment blind flange and large washer position are on the same axis screw on the blind flange, large washer and screw rod, tighten another nut then;
4. check the first end position of screw rod; As find that the screw rod first end is not concordant with nut; Then need adjust the relative position of two end nuts and screw rod, step is: loosening slightly screw rod is grown the nut of an end partially, adjusts the nut of described screw rod first end; Make the end face of described screw rod first end concordant, tighten the other end nut then with the end face of described nut;
5. 2. 3. 4. repeating step installs remaining screw rod, large washer and nut, promptly accomplishes and installs.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN102518906A true CN102518906A (en) | 2012-06-27 |
| CN102518906B 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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Cited By (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 |
| CN106641511A (en) * | 2016-11-24 | 2017-05-10 | 沪东中华造船(集团)有限公司 | Assembly method of plasticblank flange for pipe protection |
Family Cites Families (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 |
| CN101852069B (en) * | 2010-02-09 | 2013-01-09 | 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 |
| 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 |
| DE202010015931U1 (en) * | 2010-11-30 | 2011-03-24 | Aws Apparatebau Arnold Gmbh | Check gate device |
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2011
- 2011-12-30 CN CN201110456936.1A patent/CN102518906B/en active Active
Cited By (3)
| 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 |
| CN106641511A (en) * | 2016-11-24 | 2017-05-10 | 沪东中华造船(集团)有限公司 | Assembly method of plasticblank flange for pipe protection |
| 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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| CN102518906B (en) | 2016-06-29 |
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