CN203413252U - Device for connecting inner and outer anticorrosive steel plastic composite pipes - Google Patents
Device for connecting inner and outer anticorrosive steel plastic composite pipes Download PDFInfo
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- CN203413252U CN203413252U CN201320418283.2U CN201320418283U CN203413252U CN 203413252 U CN203413252 U CN 203413252U CN 201320418283 U CN201320418283 U CN 201320418283U CN 203413252 U CN203413252 U CN 203413252U
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- connecting head
- pipeline
- joint
- anticorrosive
- welded
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Abstract
The utility model relates to the technical field of connection of inner and outer anticorrosive pipelines and in particular relates to a device for connecting inner and outer anticorrosive steel plastic composite pipes. In the prior art, the inner corrosion prevention at the steel pipe joint needs to be manually treated after welding on the construction field, and the anticorrosive quality cannot be guaranteed; a pipe orifice tolerance of the steel pipe is large, generally the connection strength is guaranteed by increasing the wall thickness, and the pipeline butting difficulty is high. According to the technical scheme, a joint A and a joint B are welded at two ends of a pipeline and are subjected to anticorrosive treatment; only the joint A and the joint B at the ends of the two sections of the pipeline need to be butted and welded on the construction site, and the welded junction is subjected to outer anticorrosive treatment by utilizing an anticorrosive thermal shrinkage strip; an inner insulated slot and an outer insulated slot are formed in the joint, an insulated lining is filled in the inner insulated slot, and a sealing ring is arranged on an end face of the joint. The device is simple in structure and rapid to mount and is suitable for factory production, the field construction steps are simplified, the mechanical strength at the end of the pipeline is improved, steel products are saved, and the corrosion resistance is high.
Description
Technical field
The utility model relates to the interconnection technique field of high strength internal and external anti-corrosive pipeline, specifically a kind of connection set of internal and external anti-corrosive steel-plastic composite pipe.
Background technique
The corrosion of metallic conduit directly affects the working life of pipeline, for preventing Metal pipeline corrosion, in the equal painting anticorrosion coating of inside and outside wall of pipeline, but in the construction connecting in pipeline welding, the high heat of tube wall makes anticorrosive coat impaired, has a strong impact on the antiseptic property of pipeline enclosure joint.
Interior epoxy, outer polyethylene anticorrosion tube product on market preferably resolve the Anticorrosion of pipeline, but have the following disadvantages in practical application:
1, the anticorrosion needs of inside, anti-corrosive steel tube joint artificial treatment at the construction field (site), because on-the-spot construction environment is poor, labor intensity is large, the bicomponent liquid epoxy coating of repaired mouth and original heat are melted powder epoxy coating because the factors such as construction environment and manual operations are difficult for guaranteeing overlap joint reliably, can not effectively guarantee the anticorrosive quality at anti-corrosive steel tube interior welds place;
2,, because steel pipe nozzle mechanical property is poor, anti-corrosive steel tube, in transportation, lifting and installation process, is very easily subject to external force and makes the mouth of pipe produce deformation, causes the difficulty that is linked and packed, and has increased site operation difficulty;
3, because the nozzle diameter form and position tolerance of steel pipe is larger, be difficult for guaranteeing that pipeline attachment weld has enough intensity, in order to guarantee that pipeline has enough margin of safety (the actual effective thickness of joint) while connecting, in practical application, can only consider to increase the thickness of steel pipe, the same pipeline unit length steel consumption that increases, causes cost to rise;
4, because steel pipe bore form and position tolerance is larger, during on-the-spot installation, the mouth of pipe is difficult for aligning, and pipeline connection construction is wasted time and energy, comparatively difficulty.
Summary of the invention
The purpose of this utility model is to provide a kind of connection set of internal and external anti-corrosive steel-plastic composite pipe, simple in structure, quick for installation, easy to use, in the preservative treatment Jun manufacturer of pipeline and connection set, completes, and antiseptic property is reliable, is applicable to batch production and produces.
The technological scheme of the connection set of the utility model internal and external anti-corrosive steel-plastic composite pipe is: comprise connecting head A, connecting head B, insulation lining, seal ring and anticorrosive heat-shrinkable band;
Connecting head A and the connecting head B of annular are separately fixed at pipe end by welding, and connecting head A and connecting head B are connected side end face with pipeline is provided with outer heat dam;
Connecting head A and connecting head B are by being welded to connect, and the end face that two connecting heads are welded to each other is provided with corresponding interior heat dam and seal groove, and interior heat dam diameter is greater than the diameter of seal groove diameter and outer heat dam; In interior heat dam, be filled with insulation lining, seal ring is housed in seal groove; Anticorrosive heat-shrinkable band is wrapped in the outside of connecting head A, connecting head B and pipe end.
Further, described connecting head A and the interconnective weld bond of connecting head B are positioned at the outer rim of connecting end.
Further, described connecting head A is equipped with corresponding annular guide ledges with the connecting end surface of connecting head B.
Further, described seal ring inner side is provided with wedge slot.
Connecting means of the present utility model comprises factory process and on-the-spot installation; In Xian anti-corrosion pipeline production plant, connecting head A and connecting head B are welded to connect in pipe ends respectively, and carry out the preservative treatment of inner and outer walls of pipeline and connecting head inside; Pipeline is transported to job site, then the connecting head A of end, 2-section pipe road and connecting head B are docked and be welded to connect, and finally preservative treatment is carried out in the outside weld joint of connecting head; Its concrete steps are as follows:
1) in, anti-corrosion pipeline production plant by connecting head A and connecting head B by being welded to connect in pipe ends, scarfing cinder polishing welding seams after welding;
2), the surface derusting of pipeline and connecting head is processed: the inside and outside wall of the pipeline that is welded with connecting head and connecting head A, connecting head B are carried out to sandblast is carried out on surface or impeller blasting is processed;
3), the preservative treatment of pipeline and connecting head: for heat dam in the inwall of pipeline, connecting head A, connecting head B and two connecting head end faces is with interior part painting anticorrosion material; Pipeline outer wall and connecting head A, connecting head B external coating anti-corrosion material;
4), pipeline connects: connecting head A and the connecting head B of two joints pipe end to be connected are aligned, stuffed heat insulated lining in interior heat dam, in seal groove, pack seal ring into, then by the connecting head A of end, 2-section pipe road, connecting head B docking, compression, and by being welded to connect two connecting heads;
5), that pipeline connects the outside of weld bond is anticorrosion: scarfing cinder polishing weld bond, and at weld bond place brushing anti-corrosion material, recycling anticorrosive heat-shrinkable band is connecting head A, connecting head B parcel, and is connected with the anticorrosive coat of pipeline outer wall.
The utility model has the advantages that: simple in structure, quick for installation, easy to use, being applicable to batch production produces, simplified site operation step, improved the mechanical strength at anti-corrosion pipeline two ends, avoided in transportation, lifting and installation process, very easily being subject to external force makes the mouth of pipe produce deformation problems, antiseptic property is reliable, has overcome defect of the prior art, avoids causing the defects such as mouth of pipe connection part strength deficiency due to the diameter error of steel pipe nozzle, solved in pipeline connection procedure the problem such as the difficulty of construction that causes more greatly because of steel pipe nozzle footpath form and position tolerance is large.
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is elaborated.
Accompanying drawing explanation
Fig. 1 is linkage structure schematic diagram of the present utility model;
Fig. 2 is the partial schematic diagram of the utility model connecting head.
Embodiment
In figure: 1, pipeline, 2, connecting head A, 3, connecting head B, 4, outer heat dam, 5, outer anti-corrosive coating, 6, inner anticorrosioning coating, 7, interior heat dam, 8, weld bond, 9, anticorrosive heat-shrinkable band, 10, seal ring, 11, guide ledges.
Embodiment
From Fig. 1～Fig. 2, comprise connecting head A 2, connecting head B 3, insulation lining, seal ring 10 and anticorrosive heat-shrinkable band 9; Connecting head A 2 and connecting head B 3 can adopt Q235B steel, and its materials processing performance is good, cost is low, and is convenient to guarantee Site Welding quality (adopting common electric arc welding can meet welding requirements); Connecting head A 2 and the connecting head B 3 of annular are separately fixed at pipeline 1 end by welding, and connecting head A 2 and connecting head B 3 are connected side end face with pipeline 1 is provided with outer heat dam 4; Connecting head A 2 and connecting head B 3 are by being welded to connect, and weld bond 8 is positioned at the outer rim of two connecting head connecting ends; The end face that two connecting heads are welded to each other is provided with corresponding interior heat dam 7 and seal groove, in interior heat dam 7, is filled with insulation lining, and the seal ring 10 that inner side is provided with wedge slot is housed in seal groove; Interior heat dam 7 diameters are greater than the diameter of seal groove and outer heat dam 4, make the cross section of two connecting heads S-type, have extended heat conduction path, have increased heat diffusion area, the impact of the high heat producing in the time of can effectively alleviating welding on pipeline 1 and connecting head corrosion-inhibiting coating.Described connecting head A 2 is equipped with corresponding annular guide ledges 11 with the connecting end surface of connecting head B 3, two pipeline docking while being convenient to site operation; Anticorrosive heat-shrinkable band 9 is wrapped in the outside of connecting head A 2, connecting head B 3 and pipeline 1 end, and is connected with the anticorrosive coat of tube wall.
Use connection set of the present utility model and method connecting tube, comprise factory process and on-the-spot installation, its concrete Connection Step is as follows:
Factory process step:
1), at the two ends of pipeline 1, be welded to connect respectively an A 2 and connecting head B 3, as L485 pipeline steel tube can adopt argon arc welding, MAG welding or CO
2welding, Q235B series common steel tube adopts CO
2welding or manual arc welding; Scarfing cinder the weld of polishing after welding;
2), the surface derusting of pipeline and connecting head is processed: to being welded with the inside and outside wall of pipeline and connecting head A, the connecting head B of connecting head, carry out sandblast or impeller blasting processing, reach 2.5 grades of Sa;
3), the preservative treatment of pipeline and connecting head: for heat dam 7 in connecting head A, connecting head B inwall and the two connecting head end faces at pipeline 1 and two ends thereof forms inner anticorrosioning coating 6 with interior part painting anticorrosion material, pipeline 1 outer wall and connecting head A, connecting head B external coating anti-corrosion material become outer anti-corrosive coating 5; In the present embodiment, inner anticorrosioning coating adopts glass microballoon epoxy coating anti-corrosion material, and outer anti-corrosive coating adopts polyethylene coating anti-corrosion material.
More than welding and preservative treatment process are carried out in factory, alleviate difficulty and the labor intensity of site operation.After pipeline and connecting head are welded to connect, the end strength increase of pipeline, can reduce the damage to pipe end in transportation process.
On-the-spot installation steps:
1), pipeline welding connects: will and carry out antiseptic pipeline 1 with connecting head and be transported to job site, the connecting head A 2 of end, 2-section pipe road to be connected and connecting head B 3 over against, at the interior stuffed heat insulated lining of interior heat dam 7 (high temperature insulating ceramic fiber blanket), the seal ring 10 that packs methyl vinyl silicone rubber material in seal groove into, when pipe interior gas or fluid pressure increase, the wedge slot of seal ring 10 inner rings makes seal ring 10 to both sides tensioning, strengthens sealing effect.
By the connecting head A 2 of end, 2-section pipe road, connecting head B 3 docking, compression, and by being welded to connect; The guide ledges 11 of connecting head A 2 and connecting head B 3 connecting end surfaces, makes docking operation simple and fast, has overcome existing anti-corrosive steel tube when attended operation, the docking constructional difficulties that the mouth of pipe causes because of factors such as distortion, tolerances; The weld bond that connecting head A 2 on welding 2-section pipe road and connecting head B are 3 is positioned at the outer rim of connecting head, the inside and outside heat dam of connecting head both ends of the surface, make the S-type design in its cross-section, extended heat conduction path, interior heat dam is filled with insulation lining, has effectively avoided the damage to anticorrosion coating on pipeline of high heat that welding produces.
2), the outside of pipeline welding place is anticorrosion: scarfing cinder polishing weld bond 8, and at weld bond place brushing epoxy primer anti-corrosion material, recycling irradiated crosslinked polyalkene base material and compound anticorrosive heat-shrinkable band 9(or the anticorrosive heat-shrinkable cover of extraordinary seal hot melting glue) by connecting head A 2, connecting head B 3 parcels, and be connected with the outer anti-corrosive coating 5 of pipeline 1 outer wall.When anticorrosive heat-shrinkable band is installed in heating, base material is in radial contraction, and inner composite layer fusing, is coated on repaired mouth place, at pipeline, form a firmly anticorrosion body outward together with base material, there is excellent wear-resistant, corrosion-resistant, shock resistance and good uvioresistant and photooxidation aging property.Anticorrosive heat-shrinkable band 9 in the present embodiment adopts the WK-WSS product of Langfang City Yuan Bang pipeline corrosion protection Engineering Co., Ltd.
Connecting means of the present utility model, answers and to have simplified on-the-spot construction sequence, completes the inner side of pipeline and joint part is anticorrosion in factory, can guarantee to greatest extent pipeline corrosion protection performance, in the working life of having improved pipeline, has reduced operating cost.Utilize connecting head docking, welding, avoided the damage of welding heat to anticorrosion coating on pipeline, and the waste of material causing because compensating the trueness error thickening tube wall of steel pipe nozzle, can save a large amount of steel, take DN1000 pipeline water delivery as example: L485 pipeline steel tube, every 1000 meters can saving steel 150 tons; Q235B series common steel tube, every 1000 meters can saving steel 50 tons; There is good social benefit.
Finally should be noted that: above embodiment is used for illustrating that the technical solution of the utility model is not intended to limit; those skilled in the art modifies to mode of execution or part technical characteristics is equal to replacement; and do not depart from the essence of technical solutions of the utility model, within all should being encompassed in the utility model scope required for protection.
Claims (4)
1. a connection set for internal and external anti-corrosive steel-plastic composite pipe, is characterized in that: comprise connecting head A(2), connecting head B(3), insulation lining, seal ring (10) and anticorrosive heat-shrinkable band (9);
The connecting head A(2 of annular) and connecting head B(3) by welding, be separately fixed at pipeline (1) end, connecting head A(2) and connecting head B(3) end face that is connected side with pipeline (1) is provided with outer heat dam (4);
Connecting head A(2) and connecting head B(3) by being welded to connect, the end face that two connecting heads are welded to each other is provided with corresponding interior heat dam (7) and seal groove, interior heat dam (7) diameter is greater than seal groove diameter and outer heat dam (4) diameter; Interior heat dam is filled with insulation lining in (7), and seal ring (10) is housed in seal groove; Anticorrosive heat-shrinkable band (9) is wrapped in connecting head A(2), connecting head B(3) and the outside of pipeline (1) end.
2. the connection set of a kind of internal and external anti-corrosive steel-plastic composite pipe according to claim 1, is characterized in that: described connecting head A(2) and connecting head B(3) interconnective weld bond (8) is positioned at the outer rim of connecting end.
3. the connection set of a kind of internal and external anti-corrosive steel-plastic composite pipe according to claim 1, is characterized in that: described connecting head A(2) with connecting head B(3) connecting end surface be equipped with corresponding annular guide ledges (11).
4. the connection set of a kind of internal and external anti-corrosive steel-plastic composite pipe according to claim 1, is characterized in that: described seal ring (10) inner side is provided with wedge slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320418283.2U CN203413252U (en) | 2013-07-15 | 2013-07-15 | Device for connecting inner and outer anticorrosive steel plastic composite pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320418283.2U CN203413252U (en) | 2013-07-15 | 2013-07-15 | Device for connecting inner and outer anticorrosive steel plastic composite pipes |
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| Publication Number | Publication Date |
|---|---|
| CN203413252U true CN203413252U (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320418283.2U Expired - Fee Related CN203413252U (en) | 2013-07-15 | 2013-07-15 | Device for connecting inner and outer anticorrosive steel plastic composite pipes |
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| CN (1) | CN203413252U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322364A (en) * | 2013-07-15 | 2013-09-25 | 李晓明 | Connecting device and connecting method of internal and external anti-corrosion plastic-steel composite pipe |
| WO2018223568A1 (en) * | 2017-06-10 | 2018-12-13 | 江苏新澎复合材料有限公司 | Composite tube having fixing function and facilitating welding |
| CN110230738A (en) * | 2019-06-27 | 2019-09-13 | 北京航天新风机械设备有限责任公司 | A kind of edge joint of suitable high energy beam penetration fustion welding |
-
2013
- 2013-07-15 CN CN201320418283.2U patent/CN203413252U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322364A (en) * | 2013-07-15 | 2013-09-25 | 李晓明 | Connecting device and connecting method of internal and external anti-corrosion plastic-steel composite pipe |
| CN103322364B (en) * | 2013-07-15 | 2016-01-20 | 李晓明 | The connecting means of internal and external anti-corrosive steel-plastic composite pipe |
| WO2018223568A1 (en) * | 2017-06-10 | 2018-12-13 | 江苏新澎复合材料有限公司 | Composite tube having fixing function and facilitating welding |
| CN110230738A (en) * | 2019-06-27 | 2019-09-13 | 北京航天新风机械设备有限责任公司 | A kind of edge joint of suitable high energy beam penetration fustion welding |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20180715 |