CN201827578U - Pipeline electric melting joint adopting mortise and tenon joint structure - Google Patents
Pipeline electric melting joint adopting mortise and tenon joint structure Download PDFInfo
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- CN201827578U CN201827578U CN2010205813570U CN201020581357U CN201827578U CN 201827578 U CN201827578 U CN 201827578U CN 2010205813570 U CN2010205813570 U CN 2010205813570U CN 201020581357 U CN201020581357 U CN 201020581357U CN 201827578 U CN201827578 U CN 201827578U
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Abstract
The utility model relates to the field of welding of plastic pipelines or plastic composite pipelines, and aims at providing a pipeline electric melting joint adopting a mortise and tenon joint structure. The pipeline electric melting joint comprises two opposite pipeline ends respectively connected at two sections of pipe workpieces; one of the end surfaces of the two pipeline ends is provided with a circular raised part, and the other one is provided with a circular groove; and the size and the shape of the raised part are matched with those of the groove, and the two end surfaces are tightly attached after the raised part enters the groove. By utilizing a plastic pipe or a composite pipe welded by the pipeline electric melting joint, the interior of the electric melting joint does not have a non-fusion area, and compared with the traditional electric melting joint, the pipeline electric melting joint is better in structure continuity and better in mechanical performance, and can avoid concentrated stress generated due to existence of a cold welding area in a sleeve under the internal pressure so as to further generate the phenomenon that a crack penetrates through the sleeve to cause failure.
Description
Technical field
The utility model belongs to plastic pipe or plastic composition pipeline welding field, is specifically related to adopt the pipeline electric fusion joint of joinery and its construction.
Background technique
The electric smelting welding is widely used in and connects plastics and plastic composition pipeline, as polyethylene pipe, steel wire coiled composite tube etc.Electric smelting welding has that welding process is subjected to that interference from human factor is less, joint strength is greater than advantages such as tubing intensity, welding quality stable are reliable.For improving the electric fusion joint welding quality, guarantee that electric fusion joint can reach the requirement in piping design life-span, the existing domestic and international technician of considerable part carries out normal constraint or improvement to the structure of preparation electric fusion joint, technology, operating method, equipment appurtenance etc.At manual scraping scale problem of unstable in the electric smelting welding set-up procedure, a kind of " polyethylene tube scale cinder shredders " proposed as the Zheng Jinyang of Zhejiang University professor; The weld interval that may occur at electric smelting welding is long or not enough and cause joint " to cross weldering " or the problem of " cold welding " defective, has proposed a kind of " supersonic detection method of polyolefin pipe electrofusion welding joint cold welding defect "; Definite method at electric smelting welding optimised welding procedure has proposed " based on the method for determining time for electrically melting and welding pipelines of characteristic line "; Depend on welder's quality at electric smelting welding operating process, problem that can't intelligent management has proposed a kind of new welder, promptly " realizes the electro-fusion welding machine and the implementation method of welding quality monitoring by wireless network ".
But even if the electric fusion welding connection technology is updated and be perfect, the risk that electric fusion joint lost efficacy still exists.A kind of typical failure mode is under interior pressure effect, and first resistance wire in cold welding district outwards cracks in the electric fusion joint, finally causes sleeve to break.Causing the main cause that this failure mode takes place is because interior cold welding district's tubing and sleeve are not bonded together, and under the effect of interior pressure, the position of first resistance wire in cold welding district generation stress is concentrated in sleeve.Because the structural continuity of the joint that the existence of resistance wire destroys is easy to crack the germinating expansion under the effect of stress.
The basic reason of this failure mode is the existence in interior cold welding district, if cold welding district in eliminating makes the tubing of intermediate portion and sleeve also can be bonded together, just can avoid this failure mode to take place.But interior cold welding district is too small or may not cause melt in large quantities to intermediate flow again, thereby causes the short circuit of resistance wire overlap joint, causes problems such as local superheating.
The model utility content
The technical problems to be solved in the utility model is, overcome in the prior art in the length in cold welding district may cause stress to be concentrated or the defective of resistance wire short circuit, a kind of pipeline electric fusion joint that adopts joinery and its construction is provided.
Be the technical solution problem, the utility model is achieved through the following technical solutions:
The utility model provides a kind of pipeline electric fusion joint that adopts joinery and its construction, comprise two relative pipe heads that are connected to two sections tubing, on the end face of described two pipe heads, on one of them end face annular protrusion is set, on another end face annular groove is set; Described bump and groove size and shape are complementary, and fit tightly when bump enters latter two end face of groove.
As a kind of improvement, described pipe head and tubing are integral structure.Bump or groove are to process with milling cutter on the end face of pipe head.
As a kind of improvement, described pipe head and tubing are split-type structural, the outer ring of pipe head one end is established the die sleeve of extension, and die sleeve fixes tubing and make the both ends of the surface of pipe head and tubing to fit tightly, and described bump or groove are arranged at the other end of pipe head.
As a kind of improvement, the wall thickness of establishing tubing is e, and then the thickness of pipe head is got between 0.5e and the 1.5e, and die sleeve thickness is 0.05e～0.1e, and the outward extending angle of die sleeve is 5 °.
As a kind of improvement, the wall thickness of establishing tubing is e, and then the height of bump is 0.3e～1e, width≤0.4e, outer edge thickness 〉=0.3e; The degree of depth of bump height+0.1e 〉=groove 〉=bump height, bump width+0.1e 〉=recess width 〉=bump width, the outer edge thickness-0.1e of the outer edge thickness 〉=bump of the outer edge thickness 〉=groove of bump.
Traditional electric smelting sleeve is to produce an interior cold welding district at the electric fusion joint zone line, and zone line is not laid resistance wire, and only by a connecting line.
Adopt the pipeline electric fusion joint of joinery and its construction in the utility model, its electric smelting welding method comprises:
(1) tubing to be welded is carried out end portion treatment, adopt the pipeline electric fusion joint of joinery and its construction: two relative pipe heads are connected to two sections tubing, on an end face annular protrusion are set therein, on another end face annular groove are set; Described bump and groove size and shape are complementary, and make bump enter latter two end face of groove and fit tightly;
(2) bury resistance wire underground at the zone line of electric smelting sleeve, the wiring density of resistance wire welds according to conventional electric smelting welding process requirement less than the wiring density of resistance wire in the melting welding zone, two ends, thereby prevents that welding pressure is excessive in the welding zone.
The laying that the cold welding district buries resistance wire underground in the middle of described requires:
1) length requirement: the wall thickness of establishing tubing is e, middle cold welding section length Ln 〉=2e;
2) wiring density: the spacing dn that buries underground of middle cold welding district resistance wire gets 1.2dr≤dn≤3dr, and dr is that the resistance wire of monolateral melting zone is buried spacing underground.
Usefulness of the present utility model is:
By the plastic tube or the composite pipe of pipeline electric fusion joint in use the utility model and welding method weldering system, there is not introjection area in its electric fusion joint inside, compares traditional electric fusion joint and has better structural continuity, and mechanical property is better.The existence in cold welding district produces stress and concentrates in can avoiding under interior pressure effect owing to sleeve, and then crackle takes place runs through sleeve and lost efficacy.
Description of drawings
Fig. 1 is an electric smelting sleeve resistance wire distribution map;
Fig. 2 is with milling cutter processing tubing end view drawing;
Fig. 3 for can be enclosed within the tubing end independently with the pipe head of groove or bump;
The electric fusion joint that Fig. 4 makes for the tubing end weldering that processes with milling cutter.
Reference character is among the figure: 1 is the external cooling welding zone; 2 is electrode; 3 is fusion welded zone; 4 is middle cold welding district (merging of two interior cold weldings of traditional electrical welded joint district); 5 is tubing; 6 is recess width; 7 is depth of groove; 8 is the outer edge thickness of groove; 9 is the bump height; 10 is the outer edge thickness of bump; 11 is the bump width; 12 is tubing; 13 is the bottom surface of pipe head; 14 establish the die sleeve of extension for pipe head outer ring; 15 is the thickness of pipe head; 16 pipe heads for the band groove; 17 is the thickness of pipe head; 18 pipe heads for the band bump; 19 establish the die sleeve of extension for pipe head outer ring; 20 is the bottom surface of pipe head.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The utility model comprises two-part content:
Be to propose a kind of new electric smelting sleeve Wiring technique on the one hand.Traditional electric smelting sleeve is to produce an interior cold welding district at the electric fusion joint zone line, and zone line is wiring not.The utility model proposes at the zone line of electric smelting sleeve and also bury resistance wire underground, but the wiring density of resistance wire is littler than fusion welded zone, thereby prevent that welding pressure is excessive in the welding zone.
Be that the tubing that welds is carried out end portion treatment on the other hand, two kinds of methods can be arranged:
A kind of method is when capable end face cleaning is advanced in the electric smelting welding, mills out a groove and a bump with milling cutter respectively at two end faces of tubing to be connected.The size of groove and bump, position just make it can fit together (groove is larger than bump).Another kind method is the pipe head that special production independently has groove or bump.Two kinds of pipe heads can cooperatively interact together, can be set in the end of tubing simultaneously.
Before the electric smelting welding, groove and the bump that the tubing two ends are processed or the pipe head that is sleeved on the end stretches into the electric smelting sleeve of the aforementioned transformation of the way and make to cooperate each other by axial pressing force and be adjacent to.Adopting common electro-fusion welding machine to weld then gets final product.
Specific embodiment 1:
1, the Wiring technique of electric smelting sleeve:
It is as follows that resistance wire is imbedded the laying main points: 1) length requirement: the wall thickness of establishing tubing is e, the length L w of external cooling welding zone 1 〉=0.8e; Fusion zone 3 length L r 〉=e+5mm; Cold welding district 4 in the middle of cold welding district, both sides in the middle of former being positioned at merges into, length L n 〉=2e.2) wiring density: the resistance wire in middle cold welding district is buried the resistance wire that spacing dn is greater than the fusion zone underground and is buried spacing dr underground, desirable 1.2dr≤dn≤3dr.
2, pipe head machined grooves and bump
3, independently with the pipe head of groove or bump
The pipe head of band groove or bump is the macromolecular material identical with the tubing body material.Just use the PE80 polyethylene as the PE80 polyethylene pipe; Steel wire coiled composite tube (PSP) is just with body material polyethylene (needing the matching materials model simultaneously).
The thickness of the pipe head of band groove or bump is got between 0.5e and the 1.5e, and the size of groove and bump and distribution are identical with bump with the groove of tubing end processing.The pipe head of band groove or bump is enclosed within the tubing end by die sleeve, and die sleeve thickness is about 0.05e～0.1e.The die sleeve root links to each other with the bottom surface of pipe head.The internal diameter of die sleeve inboard is identical with pipe internal diameter; The external diameter in the die sleeve outside is identical with tube outer diameter.Therefore, the external diameter of die sleeve inboard is more bigger than pipe internal diameter; The internal diameter in the die sleeve outside is more smaller than tube outer diameter; About 5 ° of the outward extending angles of die sleeve.
Groove and bump scheme are milled in employing in the tubing end: will have tubing end milling cutter now and replace with an end one section projection is arranged, an end has the milling cutter of one section depression, thereby can mill out tubing end as shown in Figure 2.Measuring total length sleeve is L, makes marks in the place of distance tubing end L/2.The tubing that mills is inserted from the sleeve two ends, and mark line flushes with the sleeve ends plane on tubing.Firmly inwardly compress tubing, make bump tightly be inserted into inside grooves.
Adopt the tubing end to put the scheme of pipe head: die sleeve firmly compresses after being enclosed within on the tubing, makes the male and fomale(M﹠F) of pipe head bottom be adjacent to the tubing end, thereby and makes the macromolecular material of die sleeve deform to be close to tube surfaces.Measuring total length sleeve is L, makes marks in the place of the tubing that puts pipe head apart from pipe head groove or bump bottom surface L/2.Two tubing that put pipe head respectively are inserted into the electric smelting sleeve inner, and mark line flushes with the sleeve ends plane on tubing.Compress then, make pipe head to be adjacent to.
Need to prove, the groove on the pipe head of the groove of tubing end processing and bump and band groove or bump and the sectional shape of bump are not limited to rectangle, other as circular arc, parabola shaped etc., and individual layer bump, multilayer bump, add seal ring and also belong to distortion of the present utility model.
Claims (5)
1. adopt the pipeline electric fusion joint of joinery and its construction, comprise two relative pipe heads that are connected to two sections tubing, it is characterized in that, on the end face of described two pipe heads, on one of them end face annular protrusion is set, on another end face annular groove is set; Described bump and groove size and shape are complementary, and fit tightly when bump enters latter two end face of groove.
2. the pipeline electric fusion joint of employing joinery and its construction according to claim 1 is characterized in that, described pipe head and tubing are integral structure.
3. the pipeline electric fusion joint of employing joinery and its construction according to claim 1, it is characterized in that, described pipe head and tubing are split-type structural, the outer ring of pipe head one end is established the die sleeve of extension, die sleeve fixes tubing and make the both ends of the surface of pipe head and tubing to fit tightly, and described bump or groove are arranged at the other end of pipe head.
4. the pipeline electric fusion joint of employing joinery and its construction according to claim 3 is characterized in that, the wall thickness of establishing tubing is e, and then the thickness of pipe head is got between 0.5e and the 1.5e, and die sleeve thickness is 0.05e～0.1e, and the outward extending angle of die sleeve is 5 °.
5. according to the pipeline electric fusion joint of the employing joinery and its construction described in any one of the claim 1 to 4, it is characterized in that the wall thickness of establishing tubing is e, then the height of bump is 0.3e～1e, width≤0.4e, outer edge thickness 〉=0.3e; The degree of depth of bump height+0.1e 〉=groove 〉=bump height, bump width+0.1e 〉=recess width 〉=bump width, the outer edge thickness-0.1e of the outer edge thickness 〉=bump of the outer edge thickness 〉=groove of bump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205813570U CN201827578U (en) | 2010-10-28 | 2010-10-28 | Pipeline electric melting joint adopting mortise and tenon joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205813570U CN201827578U (en) | 2010-10-28 | 2010-10-28 | Pipeline electric melting joint adopting mortise and tenon joint structure |
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| Publication Number | Publication Date |
|---|---|
| CN201827578U true CN201827578U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205813570U Expired - Fee Related CN201827578U (en) | 2010-10-28 | 2010-10-28 | Pipeline electric melting joint adopting mortise and tenon joint structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052539A (en) * | 2010-10-28 | 2011-05-11 | 浙江大学 | Pipeline electric fusing joint adopting tenon-and-mortise structure and electric fusing welding method |
| CN109605757A (en) * | 2019-01-31 | 2019-04-12 | 诸暨市逍遥管道科技有限公司 | A kind of plastic conduit electro-fusion welding takes over the automatic diagnosis method of weldering defect |
| CN110578840A (en) * | 2019-09-11 | 2019-12-17 | 广东管博管道技术科技有限公司 | Pipeline mortise and tenon joint structure |
-
2010
- 2010-10-28 CN CN2010205813570U patent/CN201827578U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052539A (en) * | 2010-10-28 | 2011-05-11 | 浙江大学 | Pipeline electric fusing joint adopting tenon-and-mortise structure and electric fusing welding method |
| CN102052539B (en) * | 2010-10-28 | 2012-08-22 | 浙江大学 | Pipeline electric fusing joint adopting tenon-and-mortise structure and electric fusing welding method |
| CN109605757A (en) * | 2019-01-31 | 2019-04-12 | 诸暨市逍遥管道科技有限公司 | A kind of plastic conduit electro-fusion welding takes over the automatic diagnosis method of weldering defect |
| CN110578840A (en) * | 2019-09-11 | 2019-12-17 | 广东管博管道技术科技有限公司 | Pipeline mortise and tenon joint structure |
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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 |
Granted publication date: 20110511 Termination date: 20141028 |
|
| EXPY | Termination of patent right or utility model |