CN102359697A - Full corrosion-resistant connection structure of steel lining plastic composite pipeline - Google Patents
Full corrosion-resistant connection structure of steel lining plastic composite pipeline Download PDFInfo
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- CN102359697A CN102359697A CN2011103351203A CN201110335120A CN102359697A CN 102359697 A CN102359697 A CN 102359697A CN 2011103351203 A CN2011103351203 A CN 2011103351203A CN 201110335120 A CN201110335120 A CN 201110335120A CN 102359697 A CN102359697 A CN 102359697A
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Abstract
The invention discloses a full corrosion-resistant connection structure of a steel lining plastic composite pipeline, and belongs to the technical field of connection of the steel lining plastic composite pipeline. The structure comprises a corrosion-resistant ring sleeved on a non-meshing section of an external thread of a steel outer layer, a steel lining plastic composite pipe fitting consisting of a steel outer ring part and a plastic inner ring part, and a composite pipe consisting of the steel outer layer with the external thread, and a plastic inner layer, wherein the external thread consists of a meshing section and the non-meshing section; an annular cavity of which the inner wall is provided with an internal thread section is formed between the steel outer ring part and the plastic inner ring part; the pipe is in threaded connection with the pipe fitting; a solid hot melt adhesive is arranged in the annular cavity; when an alternating magnetic field is formed at the periphery of the joint of the pipe fitting and the pipe, the solid hot melt adhesive is in thread engagement with the steel outer ring part and in sealed connection with the end faces of the steel outer layer and the plastic inner layer; and the corrosion-resistant ring is in sealed connection with the non-meshing section of the pipe. After the scheme is adopted, the problem that the threads of the pipe and the pipe fitting are easily corroded and rusted is solved, and a full corrosion-resistant threaded connection effect is achieved.
Description
[technical field]
The present invention relates to a kind of pipe connecting structure, refer in particular to a kind ofly be used to supply water, the steel lining of system such as air feed, heating power moulds the complete anticorrosion linkage structure between pipe and the steel lining plastic pipe, belongs to steel lining composite metal plastic pipe interconnection technique field.
[background technique]
Mostly traditional pipe, pipe fitting are ironcasting, and wherein, the pipe fitting car is shaped on internal thread and the rubber sheet gasketing that places in the pipe fitting; Tube end then has the outside thread that can be threaded with pipe fitting, and its advantage is that Placement is simple, can change after pipe, the pipe fitting corrosion damage and crack; But cast iron pipe body, cast iron pipe fittings body are prone to get rusty and are not durable; Therefore the steel lining composite metal plastic pipe that is threaded gradually replaces, and the pipe fitting of steel lining composite metal plastic pipe also is built-in with rubber sheet gasketing, and right existing its shortcoming of steel lining composite metal plastic pipe is when screw thread is twisted the position, then can make rubber sheet gasketing impaired; And there are the deficiency that subjects to fluid erosion in pipe thread, pipe fitting screw thread; And when screw thread is not screwed to, then equally also can make pipe thread, pipe fitting screw thread by flow-induced corrosion, influence water quality.
In view of this, existing steel lining plastic composite pipeline connecting structure has the necessity of improvement in fact.
[summary of the invention]
The problem that the present invention will solve and the technical assignment of proposition are to overcome existing steel lining to mould pipe thread easy in the defective of flow-induced corrosion with steel lining plastic pipe screw thread, provide a kind of steel lining composite metal plastic pipe complete anticorrosion linkage structure.
For solving the problems of the technologies described above, the present invention provides following technological scheme:
The complete anticorrosion linkage structure of steel lining composite metal plastic pipe; Comprise that the steel lining plastic pipe be made up of steel outer portion, plastics internal ring portion and the steel lining outer by steel, that inner plastic is formed mould pipe; The steel skin has outside thread; This outside thread is made up of engaged section and non-engaged section; Form annular chamber between steel outer portion and the plastics internal ring portion, the pairing steel outer portion of annular chamber inwall has internal thread segment, and the outer externally threaded engaged section of steel is threaded with the internal thread segment of steel outer portion; Its improvement is: also comprise the anticorrosion ring that is placed on the outer externally threaded non-engaged section of steel; Said annular chamber is built-in with the solid state heat melten gel, and when the outer shroud week at the outside thread place that the internal thread segment and the steel lining of steel lining plastic pipe are moulded pipe formed alternating magnetic field, said solid state heat melten gel just formed the teeth shape structure with steel outer portion thread engagement; And this teeth shape solid state heat melten gel is all moulded the outer end face of steel, the sealing of inner plastic end face electromagnetic welding of pipe with steel lining, said anticorrosion ring and steel lining are moulded the non-engaged section electromagnetic welding sealing of external pipe thread.
The external end edge of above-mentioned plastics internal ring portion is positioned at the outside of solid state heat melten gel, and is positioned at the inboard of the external end edge of steel outer portion.
The external end edge of plastics internal ring portion is positioned at the outside of solid state heat melten gel; Can make inner plastic and the gap between the annular chamber stretched in the annular chamber when the fusion of solid state heat melten gel, realize good sealing; Thereby annular chamber and ducted fluid is thoroughly isolated, stopped to be positioned at engaged section and the internal thread segment of composite steel-plastic pipe fitting and the touch opportunity of fluid that the steel lining of annular chamber is moulded pipe.
The annular chamber bottom at the place, inboard of above-mentioned solid state heat melten gel is equipped with the thermoset rubber pad.
This setting can realize changing the steel lining plastic pipe or steel lining is moulded pipe; Through giving the of short duration heating and melting of solid state heat melten gel; And derotation steel lining is moulded pipe fast; Mould separating of pipe to accomplish the steel lining plastic pipe with steel lining, reappose the solid state heat melten gel and make steel lining plastic pipe and steel lining mould pipe in the annular chamber of steel lining plastic pipe be threaded once more after, can heat the solid state heat melten gel once more and implement hermetica seal operation again.
Compared with prior art, the present invention has following advantage and beneficial effect:
Effect through alternating magnetic field is generated heat the steel outer portion internal thread segment of steel lining plastic pipe and outside thread that steel lining is moulded pipe rapidly; The heat that is produced makes the fusing of solid state heat melten gel; This makes tail tooth, the steel lining of internal thread segment of steel lining plastic pipe mould the pipe end face by the complete shutoff of solid state heat melten gel; And mould fluid in the fluid passage that pipe constitutes with steel lining plastic pipe, steel lining and form isolated and do not corroded by fluid; But also having reduced the requirement that is threaded that steel lining plastic pipe and steel lining are moulded pipe, the get mildewed in warm conditions phenomenon of solidity rubber sheet gasket of the bit loss that no longer occurs spinning also can be because of twisting erosion connecting thread not in place; Since steel lining mould external pipe thread non-engaged section welding anticorrosion ring; Form steel lining and moulded the excellent sealing of this non-engaged section of external pipe thread; Thereby the aggressive medium and the non-engaged section in the external world are isolated; The non-engaged section of avoiding steel lining to mould pipe is corroded, and reaches the steel lining plastic pipe and moulds the complete anticorrosion effect that is threaded of pipe with steel lining.
When being used for water supply line; Steel lining plastic pipe and steel lining are moulded pipe and are adopted that present techniques is complete anticorrosionly to be connected formed pipeline owing to have the prolonged not by the pipeline screw interface of corrosion of health; Therefore stop the generation of interface rust water, reduced the chance of piped water supply secondary pollution.
[description of drawings]
Fig. 1 is the section of structure that steel lining plastic pipe of the present invention is an elbow;
To be the steel lining plastic pipe mould with steel lining that pipe thread is connected to Fig. 2 and electromagnetic heater is set and is realizing hot melt seal connection structure sectional drawing (wherein, being stacked with solid state heat melten gel, thermoset rubber pad in the annular chamber) under the electromagnetic induction heating in the joint periphery;
To be the steel lining plastic pipe mould with steel lining that pipe thread is connected to Fig. 3 and electromagnetic heater is set and is realizing hot melt seal connection structure sectional drawing (wherein, only being equipped with the solid state heat melten gel in the annular chamber) under the electromagnetic induction heating in the joint periphery.
Do further explain below in conjunction with accompanying drawing with regard to the present invention.
[embodiment]
As shown in Figure 3; The complete anticorrosion linkage structure of steel lining composite metal plastic pipe is mainly moulded pipe 2, anticorrosion ring 5 and solid state heat melten gel 3 by steel lining plastic pipe 1, steel lining and is formed, the single piece that steel lining plastic pipe 1 is compounded to form by steel outer portion 11 and plastics internal ring portion 12; Steel outer portion 11 starts from its end, has processed internal thread segment 111 along inwall; Steel outer portion 11 is surrounded with plastics internal ring portion 12 and is formed annular chamber 10, and it is a single piece that is compounded to form by steel outer 21 and inner plastic 22 that steel lining is moulded 2 on pipe, and steel outer 21 starts from its end, processed one section outside thread L along outer wall; Steel lining behind the formation outside thread L moulds the bore of pipe 2 and the bore of annular chamber 10 matches; This outside thread L is made up of long engaged section L1 and short non-engaged section L2, and the engaged section L1 that steel lining is moulded pipe 2 is threaded with the internal thread segment 111 of steel lining plastic pipe 1 steel outer portion 11, in conjunction with shown in Figure 1; Steel lining plastic pipe 1 is an elbow form; It has steel outer portion that plastics internal ring portion 12, two sections all have internal thread segment and two annular chambers (only schematically showing an annular chamber 10, one section internal thread segment 111 among the figure), so these two sections internal thread segment steel lining that all can be threaded respectively moulds pipe, further; As required, steel lining plastic pipe 1 of the present invention can also be such as threeway, four-way, the first-class pipe fitting of the fire hose.
The improvement of this case is to be built-in with solid state heat melten gel 3 in annular chamber 10 bottoms, and is sealedly connected with anticorrosion ring 5 at the non-engaged section L2 that steel lining is moulded pipe 2, but has the characteristics of not only bonded metal but also bonding plastics after solid state heat melten gel 3 is heated, and is commercially available.Moulding pipe 2 completion when steel lining plastic pipe 1 and steel lining is threaded; And when the outer shroud week at the outside thread L place that the internal thread segment 111 and the steel lining of steel lining plastic pipe 1 are moulded pipe 2 forms alternating magnetic field; Solid state heat melten gel 3 just forms the teeth shape structure with the engagement of steel outer portion 11 screw thread tail teeth; Formed teeth shape solid state heat melten gel 3 seals with outer 21 end faces of the steel at outside thread L place, inner plastic 22 end face electromagnetic weldings respectively; Teeth shape solid state heat melten gel 3 and annular chamber 10 bottom electromagnetic weldings, anticorrosion ring 5 is moulded steel lining the non-engaged section L2 electromagnetic welding sealing of pipe 2 outside thread L simultaneously.
Wherein, the external end edge of plastics internal ring portion 12 is positioned at this solid state heat melten gel 3 outsides, and the external end edge inboard that is positioned at steel outer portion 11.Increased the degree of depth of annular chamber 10, this measure can prolong the axial seal length of annular chamber 10, can make inner plastic 22 and the gap between the annular chamber 10 that when 3 fusions of solid state heat melten gel, will stretch in the annular chamber 10 realize good sealing corrosion.
In addition, for further improving the antiseptic effect that steel lining is moulded the non-engaged section L2 of pipe 2, can before being nested with anticorrosion ring 5, twine several layers sealing strip 7 (such as raw meal belts) at this non-engaged section L2 earlier.
The specific operation process of the complete anticorrosion connection of steel lining composite metal plastic pipe is following: at first in annular chamber 10, place solid state heat melten gel 3; Make solid state heat melten gel 3 be positioned near annular chamber 10 bottoms; Then moulding pipe 2 to steel lining plastic pipe 1 and steel lining is threaded together; Then be connected the alternating current generator (not shown) with electromagnetic heater 6; Then electromagnetic heater 6 is placed on the outer shroud week at the internal thread segment 111 of steel lining plastic pipe 1 and the outside thread L place that steel lining is moulded pipe 2; Start alternating current generator; Make electromagnetic heater 6 produce alternating magnetic field; Steel outer portion 11, the steel lining that passes steel lining plastic pipe 1 when the alternation magnetic line of force of alternating magnetic field moulds that the steel of pipe 2 is outer to produce countless eddy current 21 the time, the just heating rapidly of steel outer portion 11, steel outer 21, and the solid state heat melten gel 3 after the fusing moulds outer 21 end faces of steel of pipe 2 with steel lining respectively, with inner plastic 22 end faces, be tightly connected with annular chamber 10 bottom hot melts; Matching gap between the inner plastic 22 at annular chamber 10 and engaged section L1 place is also by 3 hermetica seals of solid state heat melten gel; And solid state heat melten gel 3 form dentations and with steel outer portion 11 screw thread tail tooth engages and seals, anticorrosion ring 5 inwalls and steel lining molten being tightly connected of non-engaged section L2 electromagnetism of moulding pipe 2 outside thread L, and the right flank of anticorrosion ring 5 simultaneously and steel lining plastic pipe 1 left side electromagnetism melt and are tightly connected.
As to technique scheme further replenish and perfect, the present invention also comprises following additional technical feature, so that select for use as required in the specific implementation.
As shown in Figure 2, annular chamber 10 bottoms at the place, right side of solid state heat melten gel 3 are equipped with thermoset rubber pad 4, and the solid state heat melten gel 3 of this moment is not interposing at annular chamber 10 bottoms.
When needing replacing steel lining plastic pipe 1 or steel lining to mould pipe 2; Be nested with electromagnetic heater 6 in solid state heat melten gel 3 corresponding steel lining plastic pipe 1 peripheries; Through giving solid state heat melten gel 3 of short duration heating and meltings; And fast derotation steel lining is moulded pipe 2, moulds separating of pipe 2 to accomplish steel lining plastic pipe 1 with steel lining, for steel lining plastic pipe 1 and steel lining mould pipe 2 again the preserving and sealing welding prepare.
Claims (3)
1. complete anticorrosion linkage structure of steel lining composite metal plastic pipe; Comprise that the steel lining plastic pipe be made up of steel outer portion, plastics internal ring portion and the steel lining outer by steel, that inner plastic is formed mould pipe; The steel skin has outside thread; This outside thread is made up of engaged section and non-engaged section; Form annular chamber between steel outer portion and the plastics internal ring portion, the pairing steel outer portion of annular chamber inwall has internal thread segment, and the outer externally threaded engaged section of steel is threaded with the internal thread segment of steel outer portion; It is characterized in that: also comprise the anticorrosion ring that is placed on the outer externally threaded non-engaged section of steel; Said annular chamber is built-in with the solid state heat melten gel, and when the outer shroud week at the outside thread place that the internal thread segment and the steel lining of steel lining plastic pipe are moulded pipe formed alternating magnetic field, said solid state heat melten gel just formed the teeth shape structure with steel outer portion thread engagement; And this teeth shape solid state heat melten gel is all moulded the outer end face of steel, the sealing of inner plastic end face electromagnetic welding of pipe with steel lining, said anticorrosion ring and steel lining are moulded the non-engaged section electromagnetic welding sealing of external pipe thread.
2. the complete anticorrosion linkage structure of steel lining composite metal plastic pipe according to claim 1, it is characterized in that: the external end edge of said plastics internal ring portion is positioned at the outside of solid state heat melten gel, and is positioned at the inboard of the external end edge of steel outer portion.
3. the complete anticorrosion linkage structure of steel lining composite metal plastic pipe according to claim 1 and 2 is characterized in that: the annular chamber bottom at the place, inboard of said solid state heat melten gel is equipped with the thermoset rubber pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103351203A CN102359697A (en) | 2011-10-18 | 2011-10-18 | Full corrosion-resistant connection structure of steel lining plastic composite pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103351203A CN102359697A (en) | 2011-10-18 | 2011-10-18 | Full corrosion-resistant connection structure of steel lining plastic composite pipeline |
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| CN102359697A true CN102359697A (en) | 2012-02-22 |
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| CN2011103351203A Pending CN102359697A (en) | 2011-10-18 | 2011-10-18 | Full corrosion-resistant connection structure of steel lining plastic composite pipeline |
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| CN103964383A (en) * | 2014-05-05 | 2014-08-06 | 福建省邵武市永晶化工有限公司 | Plastic-lined equipment and method for producing hydrofluoric acid through plastic-lined equipment |
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| US10288272B2 (en) | 2016-03-17 | 2019-05-14 | Zhejiang Super Lighting Electric Appliance Co., Ltd | Curved LED tubular lamp |
| CN108889859A (en) * | 2018-08-22 | 2018-11-27 | 江苏众信绿色管业科技有限公司 | A kind of steel lining stainless steel internal thread tube piece combined-machining equipment |
| CN108889859B (en) * | 2018-08-22 | 2024-03-12 | 江苏众信绿色管业科技有限公司 | Composite processing equipment for stainless steel internal thread pipe fitting with steel lining |
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