CN202280968U - Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic - Google Patents
Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic Download PDFInfo
- Publication number
- CN202280968U CN202280968U CN2011204205229U CN201120420522U CN202280968U CN 202280968 U CN202280968 U CN 202280968U CN 2011204205229 U CN2011204205229 U CN 2011204205229U CN 201120420522 U CN201120420522 U CN 201120420522U CN 202280968 U CN202280968 U CN 202280968U
- Authority
- CN
- China
- Prior art keywords
- steel
- pipe
- composite pipe
- solid state
- anticorrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 239000004033 plastic Substances 0.000 title claims abstract description 64
- 229920003023 plastic Polymers 0.000 title claims abstract description 64
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims description 60
- 230000009972 noncorrosive effect Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004831 Hot glue Substances 0.000 abstract 3
- 230000007547 defect Effects 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 3
- 238000013023 gasketing Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 241000692569 Stylephorus chordatus Species 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The utility model discloses a threaded connection structure of an anticorrosion metal lining composite pipe and a steel composite pipe fitting lined with plastic. The threaded connection structure comprises an anticorrosion ring, a steel composite pipe fitting lined with plastic and a composite pipe, wherein the anticorrosion ring is arranged at a non-meshing section of an external thread of a steel outer layer, the steel composite pipe fitting lined with plastic is composed of a steel external ring part and a plastic internal ring part, the composite pipe is composed of the steel outer layer with an external thread and an anticorrosion metal lining, and the external thread is composed of a meshing section and the non-meshing section; an annular cavity the inner wall of which is provided with an internal thread section is formed between the steel external ring part and the plastic internal ring part, the pipe is in threaded connection with the pipe fitting, and the annular cavity is internally provided with a solid hot melt adhesive; when an alternating magnetic field is generated at the periphery of the joint of the pipe fitting and the pipe, the solid hot melt adhesive is meshed with the steel external ring part in a threaded manner, the solid state hot melt adhesive is hermetically connected with a steel outer layer end face and an anticorrosion metal lining end face, and the anticorrosion ring is hermetically connected with the non-meshing section of the pipe. A defect that threads of the pipe and the pipe fitting are easy to erode and rust can be solved through adopting the scheme, thereby achieving a full anticorrosion threaded connection effect.
Description
[technical field]
The utility model relates to a kind of pipe connecting structure; Refer in particular to a kind ofly be used to supply water, the compound pipe of inside lining anti-corrosive metal layer of system such as air feed, heating power and the screw connection structure between the steel lining plastic composite pipe, belong to steel lining composite metal plastic pipe interconnection technique field.
[background technique]
Mostly traditional pipe, pipe fitting are ironcasting; Wherein, the pipe fitting car is shaped on internal thread and the rubber sheet gasketing that places in the pipe fitting, and tube end then has the outside thread that can be threaded with pipe fitting; Its advantage is that Placement is simple; Can change behind pipe, the pipe fitting corrosion cracking, but cast iron pipe body, cast iron pipe fittings body are prone to get rusty and are not durable, the pipeline replacement that therefore is threaded with the steel lining plastic composite pipe and forms by the compound pipe of inside lining anti-corrosive metal layer gradually; Compound pipe is outer by steel, the non-corrosive metal (NCM) internal layer is formed; The connecting thread that the steel skin has is prone to get rusty, the steel lining plastic composite pipe also be built-in with rubber sheet gasketing and with the spin connecting thread of usefulness of compound pipe, but the connecting thread of steel lining plastic composite pipe, compound pipe thread all are prone to get rusty; When screw thread is twisted the position, can make then that rubber sheet gasketing was impaired, and exist compound pipe thread, steel lining plastic composite pipe screw thread to subject to the deficiency that fluid erosion is got rusty; And revolve when not in place when screw thread, compound pipe thread, steel lining plastic composite pipe screw thread are got rusty by flow-induced corrosion, influence water quality.
In view of this, compound pipe of existing inside lining anti-corrosive metal layer and steel lining plastic composite pipe screw connection structure have the necessity of improvement in fact.
[model utility content]
The problem that the utility model will solve and the technical assignment of proposition are to overcome the defective that the existing compound pipe thread of non-corrosive metal (NCM) lining and steel lining plastic composite pipe screw thread are prone to be corroded and get rusty, and the screw connection structure of compound pipe of a kind of non-corrosive metal (NCM) lining and steel lining plastic composite pipe is provided.
For solving the problems of the technologies described above, the utility model provides following technological scheme:
The screw connection structure of compound pipe of non-corrosive metal (NCM) lining and steel lining plastic composite pipe; Comprise steel lining plastic composite pipe and the compound pipe outer by steel, that the non-corrosive metal (NCM) lining is formed formed by steel outer portion, plastics internal ring portion; 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, the outside thread place of the internal thread segment of steel lining plastic composite pipe and compound pipe outer shroud week form alternating magnetic field the time, said solid state heat melten gel just forms the teeth shape structure with steel outer portion thread engagement; And this teeth shape solid state heat melten gel all seals with the outer end face of the steel of compound pipe, non-corrosive metal (NCM) lining end face electromagnetic welding, the externally threaded non-engaged section electromagnetic welding sealing of said anticorrosion ring and compound pipe.
The non-corrosive metal (NCM) lining of above-mentioned compound pipe is stainless steel lining or brass layer.
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 non-corrosive metal (NCM) lining and the gap between the annular chamber that when the fusion of solid state heat melten gel, will stretch in the annular chamber 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 steel lining plastic composite pipe and the touch opportunity of fluid of the compound pipe of annular chamber.
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 steel lining plastic composite pipe or compound pipe; Through giving the of short duration heating and melting of solid state heat melten gel; And the quick compound pipe of the derotation; Accomplishing separating of steel lining plastic composite pipe and compound pipe, toward the annular chamber of steel lining plastic composite pipe in, reapposing the solid state heat melten gel and, can heat new solid state heat melten gel once more and implement hermetica seal operation again with after compound pipe is threaded.
Compared with prior art, the utlity model 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 composite pipe and the outside thread of compound pipe rapidly; The heat that is produced makes the fusing of solid state heat melten gel; This makes the tail tooth, compound pipe end face of internal thread segment of steel lining plastic composite pipe by the complete shutoff of solid state heat melten gel; And the fluid in the fluid passage that is constituted with steel lining plastic composite pipe, compound pipe forms isolated and is not corroded by fluid; But also having reduced of the be threaded requirement of steel lining plastic composite pipe with compound pipe, the get mildewed in warm conditions phenomenon of solidity rubber sheet gasket of the bit loss that no longer occurs spinning can be because of the erosion connecting thread not in place that spins yet; Since the externally threaded non-engaged section welding of compound pipe anticorrosion ring; Formed the excellent sealing of externally threaded this non-engaged section of compound pipe; Thereby the aggressive medium and the non-engaged section in the external world are isolated; Avoid the non-engaged section of compound pipe to be corroded, reach steel lining plastic composite pipe and the complete anticorrosion effect that is threaded of compound pipe.
[description of drawings]
Fig. 1 is that the steel lining plastic composite pipe of the utility model is the section of structure of elbow;
Fig. 2 is that the steel lining plastic composite pipe is threaded with compound pipe 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;
Fig. 3 is that the steel lining plastic composite pipe is threaded with compound pipe 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 utility model.
[embodiment]
As shown in Figure 3; The screw connection structure of compound pipe of non-corrosive metal (NCM) lining and steel lining plastic composite pipe; Mainly form by steel lining plastic composite pipe 1, compound pipe 2, anticorrosion ring 5 and solid state heat melten gel 3, the single piece that steel lining plastic composite 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; 2 on compound pipe is a single piece that is compounded to form by steel outer 21 and non-corrosive metal (NCM) lining 22, and non-corrosive metal (NCM) lining 22 can be the stainless steel lining, also can be copper lining; Its thickness is 0.20mm～0.30mm; Steel outer 21 starts from its end, has processed one section outside thread L along outer wall, and the bore of the compound pipe 2 behind the formation outside thread L and the bore of annular chamber 10 match, and this outside thread L is made up of long engaged section L1 and short non-engaged section L2; The engaged section L1 of compound pipe 2 is threaded with the internal thread segment 111 of steel lining plastic composite pipe 1 steel outer portion 11; In conjunction with shown in Figure 1, steel lining plastic composite pipe 1 is an elbow form, and 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); Therefore these two sections internal thread segment all can be threaded with a compound pipe respectively; Further, as required, the steel lining plastic composite pipe 1 of the utility model 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, to be sealedly connected with anticorrosion ring 5 at the non-engaged section L2 of compound 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.When steel lining plastic composite pipe 1 and compound pipe 2 completion are threaded; And the outside thread L place of internal thread segment of steel lining plastic composite pipe 1 111 and compound pipe 2 outer shroud week form alternating magnetic field the time; 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, non-corrosive metal (NCM) lining 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 with the non-engaged section L2 electromagnetic welding sealing of compound 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.Increase the degree of depth of annular chamber 10, realize good sealing corrosion property as lifting the axial seal length that can prolong annular chamber 10, can make non-corrosive metal (NCM) lining 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.
In addition, for further improving the antiseptic effect of the non-engaged section L2 of compound 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 compound pipe of non-corrosive metal (NCM) lining is following with the anticorrosion specific operation process that is connected of steel lining plastic composite pipe: 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 be threaded steel lining plastic composite pipe 1 together with compound pipe 2; Then be connected the alternating current generator (not shown) with electromagnetic heater 6; Then electromagnetic heater 6 is placed on outer shroud week at outside thread L place of internal thread segment 111 and the compound pipe 2 of steel lining plastic composite pipe 1; Start alternating current generator; Make electromagnetic heater 6 produce alternating magnetic field;, the alternation magnetic line of force of alternating magnetic field produces countless eddy current when passing the steel outer portion 11 of compound pipe 2, steel lining plastic composite pipe 1, compound pipe 2, just heating rapidly of steel outer portion 11, and the solid state heat melten gel 3 after the fusing is tightly connected with compound pipe 2 end faces, annular chamber 10 bottom hot melts respectively; Good sealing corrosion property is realized in non-corrosive metal (NCM) lining 22 and the gap between the annular chamber 10 that the solid state heat melten gel 3 of fusion also will stretch in the annular chamber 10; 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 are tightly connected with the non-engaged section L2 electromagnetism of compound pipe 2 outside thread L is molten simultaneously, and the right flank of anticorrosion ring 5 and steel lining plastic composite pipe 1 left side electromagnetism melt and be tightly connected.
As to technique scheme further replenish and perfect, the utility model 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 to change steel lining plastic composite pipe 1 or compound pipe 2; Be nested with electromagnetic heater 6 in solid state heat melten gel 3 corresponding steel lining plastic composite pipe 1 peripheries; Through giving solid state heat melten gel 3 of short duration heating and meltings; And the quick compound pipe 2 of the derotation, to accomplish separating of steel lining plastic composite pipe 1 and compound pipe 2, for steel lining plastic composite pipe 1 and compound pipe 2 preserving and sealing welding are again prepared.
Claims (4)
1. the screw connection structure of compound pipe of non-corrosive metal (NCM) lining and steel lining plastic composite pipe; Comprise steel lining plastic composite pipe and the compound pipe outer by steel, that the non-corrosive metal (NCM) lining is formed formed by steel outer portion, plastics internal ring portion; 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, the outside thread place of the internal thread segment of steel lining plastic composite pipe and compound pipe outer shroud week form alternating magnetic field the time, said solid state heat melten gel just forms the teeth shape structure with steel outer portion thread engagement; And this teeth shape solid state heat melten gel all seals with the outer end face of the steel of compound pipe, non-corrosive metal (NCM) lining end face electromagnetic welding, the externally threaded non-engaged section electromagnetic welding sealing of said anticorrosion ring and compound pipe.
2. screw connection structure according to claim 1 is characterized in that: the non-corrosive metal (NCM) lining of said compound pipe is stainless steel lining or brass layer.
3. screw connection structure according to claim 1 and 2 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.
4. screw connection structure according to claim 3 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 |
|---|---|---|---|
| CN2011204205229U CN202280968U (en) | 2011-10-18 | 2011-10-18 | Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204205229U CN202280968U (en) | 2011-10-18 | 2011-10-18 | Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280968U true CN202280968U (en) | 2012-06-20 |
Family
ID=46227136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204205229U Expired - Fee Related CN202280968U (en) | 2011-10-18 | 2011-10-18 | Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673852A (en) * | 2021-10-15 | 2022-06-28 | 南京联众工程技术有限公司 | Hot-melt plastic type connecting structure of threaded steel pipe and processing method thereof |
| WO2024178531A1 (en) * | 2023-02-27 | 2024-09-06 | 含山瑞可金属有限公司 | Combined connection pipe fitting |
-
2011
- 2011-10-18 CN CN2011204205229U patent/CN202280968U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673852A (en) * | 2021-10-15 | 2022-06-28 | 南京联众工程技术有限公司 | Hot-melt plastic type connecting structure of threaded steel pipe and processing method thereof |
| WO2024178531A1 (en) * | 2023-02-27 | 2024-09-06 | 含山瑞可金属有限公司 | Combined connection pipe fitting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102359697A (en) | Full corrosion-resistant connection structure of steel lining plastic composite pipeline | |
| CN202597948U (en) | Completely anticorrosion plastic-steel composite pipe fitting with pipe thread | |
| CN202280968U (en) | Threaded connection structure of anticorrosion metal lining composite pipe and steel composite pipe fitting lined with plastic | |
| CN101279394A (en) | Welding method for thin-wall stainless steel pipe and copper pipe fitting | |
| CN105773082B (en) | A kind of engine is combined the preparation method of jet pipe | |
| CN202252628U (en) | Full-anti-corrosion connecting structure of steel-lined plastic composite pipeline | |
| CN202834545U (en) | Connection structure of electromagnetic induction fully-heating type steel-plastic composite pipeline | |
| CN206036491U (en) | RTP coupling | |
| CN102829276B (en) | Electromagnetic induction heating type steel-plastic composite pipeline full fusion welding structure | |
| CN205207932U (en) | Inner groove electrothermal welding socket joint formula steel band bellows of heavy -calibre | |
| CN203131248U (en) | Dedicated titanium-copper composite transition joint | |
| CN201875295U (en) | Steel-plastic composite hot water pipe | |
| CN205640009U (en) | Compound pipeline under pressure connection structure of multiple reinforcing | |
| CN210346361U (en) | Cooling water pipe for bottom ring of submerged arc furnace | |
| CN209272760U (en) | A kind of heat exchanger tube expanded and welded tube joint clad tubesheet structure | |
| CN210004026U (en) | Steel pipeline two-section type inner-repaired-opening-free dead-end connecting assembly | |
| CN202955393U (en) | Bending-connection steel-plastic composite pipe with external thread insert | |
| CN202955398U (en) | Straight connection type steel-plastic composite pipe with external thread insert | |
| CN100480561C (en) | PE electric-melting pipeline valve | |
| CN202834539U (en) | Full welding structure of electromagnetic induction heating type steel-plastic composite pipeline | |
| CN202032227U (en) | Electromagnetic fusion connecting structure for steel-lined plastic composite pipe | |
| CN202176832U (en) | High-pressure corrosion-resistant high-temperature-resistant steel plastic composite pipe | |
| CN206130403U (en) | Hot melt formula RTP high -pressure pipe joint | |
| CN1857787A (en) | Rotating production process of composite metal-plastic pipe | |
| CN201434156Y (en) | Steel-plastic composite pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20151018 |
|
| EXPY | Termination of patent right or utility model |