CN102691849A - Universal butt joint type poly ethylene (PE) injection molding pipe fitting - Google Patents
Universal butt joint type poly ethylene (PE) injection molding pipe fitting Download PDFInfo
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- CN102691849A CN102691849A CN2012101894074A CN201210189407A CN102691849A CN 102691849 A CN102691849 A CN 102691849A CN 2012101894074 A CN2012101894074 A CN 2012101894074A CN 201210189407 A CN201210189407 A CN 201210189407A CN 102691849 A CN102691849 A CN 102691849A
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- pipe fitting
- pipe
- sdr
- butt joint
- outer diameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
- F16L47/265—Reduction units
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a universal butt joint type poly ethylene (PE) injection molding pipe fitting, which comprises a pipe fitting body and is characterized in that the left end and the right end of the pipe fitting body are respectively made into step type connecting end openings with various standard dimension ratio (SDR) values, and the wall thicknesses of the step type connecting end openings are gradually increased. Pipe materials with the same outer diameter and different SDR values only need to be matched with pipe fittings with the same outer diameter to be used instead of being matched with the pipe fittings with the same outer diameter and different SDR values to be used, i.e. only the same outer diameter of the pipe fittings and the pipe materials is needed, and the SDR value of the pipe fittings does not need to be considered. In the prior art, the pipe fittings with the same outer diameter in five specifications are in one-to-one correspondence to the pipe materials in five specifications, and the universal pipe fitting provided by the invention with the same outer diameter can correspond to the pipe materials in five specifications.
Description
Technical field
The invention belongs to plastic pipe, specifically a kind of omnipotent butt joint type PE injection moulding pipe fitting.
Background technique
The pipe thickness of PE tubing has determined its pressure rating, and the thickness of the different tube walls of SDR coefficient is also different.As the SDR value of five kinds of specifications is just arranged in the PE supply pipe GB/T13663-2000 standard, be that example: SDR11 is 1.6Mpa with PE100 level product; SDR13.6 is 1.25Mpa; SDR17 is 1.0MPa; SDR21 is 0.8MPa; SDR26 is 0.6Mpa; The tubing that is same external diameter specification series just has five kinds of different wall thickness value; And the tubing of same external diameter can not have the pipe fitting of corresponding five kinds of wall thickness to match; Though there is indivedual PE pipe fitting producer to open the injection moulding pipe fitting mold (SDR11 and SDR17) of two pressure ratings respectively; The pipe fitting of the corresponding 1.6MPa of difference and two pressure ratings of 1.0MPa, but this also can't satisfy the wall thickness difference that all SDR series tubing produce.
The existence of this wall thickness difference just when two different serial tubing, pipe fittings of SDR of wall thickness pass through the hot melt connection, causes " stress is concentrated " phenomenon at the welding position, the time has been grown because the easy direct initiation pipe-line system of stress relief is leaked.Therefore " buried polyethylene feedwater piping engineering rules " (CJJ101-2004) are clearly stipulated, the tubing of different SDR grades, pipe fitting must not directly be used for welding.But for the pipe fitting of different series and being connected of tubing, thick (SDR11) pipe fitting of wall thickness can only be bought by unit in charge of construction in the reality construction, then with lathe with its turning to required wall thickness dimension, directly weld behind the hot melt again.But most of unit in charge of construction does not possess corresponding condition and working ability; Weld behind just direct tubing, the pipe fitting hot melt different SDR values; Cause weld to form " stress is concentrated " phenomenon because of wall thickness is different, thereby buried potential safety hazard to construction quality.
Summary of the invention
The present invention provides a kind of omnipotent butt joint type PE injection moulding pipe fitting in order to solve the deficiency that exists in the existing technology.
Technical solution problem of the present invention adopts following scheme:
A kind of omnipotent butt joint type PE injection moulding pipe fitting comprises the pipe fitting body, and its structural feature is that the right ends of said pipe fitting body all is set to its wall thickness by being as thin as the thick cascade connecting port that is multiple SDR value successively.
Structural feature of the present invention also is:
Length of tube L under said each SDR value is 8-20mm.
The pipe outer wall of said each SDR value phase joining place is provided with the outer convex rib that is used to identify, and the convexity of said outer convex rib is 0.2mm, and sign has corresponding SDR numerical value between the muscle of said outer convex rib and the muscle.
Compared with present technology, beneficial effect of the present invention is embodied in:
The present invention only needs the pipe fitting of same outer diameter as to be used to the tubing of the different SDR values of same external diameter, and does not need a plurality of pipe fittings of the multiple SDR value of same external diameter to be used.As long as promptly only need pipe fitting identical with tube outer diameter, and how many SDR values that need not consider pipe fitting is, the pipe fitting of five kinds of specifications of former same external diameter is the tubing of corresponding five kinds of specifications one by one, now the tubing that the omnipotent pipe fitting of same external diameter just can five kinds of specifications of correspondence.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a practical implementation schematic representation of the present invention.
Label among the figure: 1 pipe fitting body, 2 connecting ports, 3 outer convex ribs, 4 tubing one, 5 tubing two
The present invention is further specified through embodiment below in conjunction with accompanying drawing.
Embodiment
As shown in Figure 1, omnipotent butt joint type PE injection moulding pipe fitting comprises pipe fitting body 1, and the right ends of pipe fitting body all is set to its wall thickness by being as thin as the thick cascade connecting port 2 that is multiple SDR value successively.Length of tube L under each SDR value is 8-20mm.And the pipe outer wall of each SDR value connection is provided with the outer convex rib 3 that is used to identify, and the convexity of outer convex rib is about 0.2mm, and sign has corresponding SDR numerical value between the muscle of outer convex rib and the muscle.
Embodiment is decided to be " small-sized bore pipe fitting " with eight specifications of dn75--dn200 in the GB/T13663-2000 standard (dn refers to nominal outside diameter, down together); Six specifications of dn225--dn400 are decided to be " medium-sized bore pipe fitting "; The pipe fitting of dn450--dn1200 specification is decided to be " large-scale bore pipe fitting "
1) each SDR specification of " L " expression is set to certain length among the figure; Its predominant use is when welding, to want milling to fall certain-length; On electric hot-melt plate, melt away certain-length (specification is big more, and what melt away is more) then again, also must observe the flange phenomenon of tubing, pipe fitting during butt joint.It is 8mm (millimeter) that each specification of small-sized bore pipe fitting (dn75--dn200) is provided with length L; It is 12mm that each specification of medium-sized bore pipe fitting (dn225--dn400) is provided with length L; It is 20mm that each specification of large-scale bore pipe fitting (dn450--dn1200) is provided with length L.
2) then corresponding each bore specification wall thickness of " H " value and SDR absolute value among the figure, this value guarantees the nominal wall thickness of this specification SDR value.
3) " outer convex rib " is that milling before welding adds man-hour among the figure; A muscle that lets the operator can be clear, see intuitively; And also be carved with the printed words of SDR value between muscle and the muscle, outer convex rib and SDR value printed words are protrusion, do not influence the resistance to pressure of pipe fitting; And projection also has only 0.2mm, the clamping in the time of can not influencing the hot melt butt joint.
Use embodiment:
Example: have a client to buy that raw material are PE100 levels on the market; Specification is dn200, SDR21 and PE100 level; Specification is the PE water-feeding pipes of dn200, SDR26, but the pipe fitting of buying is dn200, SDR11's; Both because SDR value (standard dimention ratio) difference wall thickness difference will produce the stress concentration phenomenon, with the passing of time olderly are released in the weld seepage that is bound to slowly occur owing to stress when welding like this.Yet, if use PE100 level of the present invention, the omnipotent butt joint type of dn200 pipe fitting, at first with the pipe fitting two ends according to the sign milling of outer convex rib and SDR numerical value to the port of tubing same size the time, ability is docked with the tubing hot melt.Eliminate the stress concentration phenomenon so effectively, and need not open the tubing that a lot of pipe fitting molds of system satisfy all SDR series, not only safe and reliable but also economical and practical.
The PE pipe fitting of molding and forming is in the market generally only accomplished the pipe fitting of external diameter≤630, and the pipe fitting of dn800, dn1000, dn1200 etc.>=630 specifications is all made through " compacting " or " splicing of weldering system " mode.For the compacting pipe fitting, only need to improve plug (internal mold) and can reach effect same; Only need use the splicing of same specification SDR series tubing weldering system just to become for weldering system splicing pipe fitting.
Claims (3)
1. an omnipotent butt joint type PE injection moulding pipe fitting comprises the pipe fitting body, it is characterized in that, the right ends of said pipe fitting body all is set to its wall thickness by being as thin as the thick cascade connecting port that is multiple SDR value successively.
2. a kind of omnipotent butt joint type PE injection moulding pipe fitting according to claim 1 is characterized in that the length of tube L under said each SDR value is 8-20mm.
3. a kind of omnipotent butt joint type PE injection moulding pipe fitting according to claim 1 and 2; It is characterized in that; The pipe outer wall of said each SDR value connection is provided with the outer convex rib that is used to identify, and the convexity of said outer convex rib is 0.2mm, and sign has corresponding SDR numerical value between the muscle of said outer convex rib and the muscle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101894074A CN102691849A (en) | 2012-06-08 | 2012-06-08 | Universal butt joint type poly ethylene (PE) injection molding pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101894074A CN102691849A (en) | 2012-06-08 | 2012-06-08 | Universal butt joint type poly ethylene (PE) injection molding pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102691849A true CN102691849A (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101894074A Pending CN102691849A (en) | 2012-06-08 | 2012-06-08 | Universal butt joint type poly ethylene (PE) injection molding pipe fitting |
Country Status (1)
| Country | Link |
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| CN (1) | CN102691849A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598157A (en) * | 1969-08-04 | 1971-08-10 | Owens Corning Fiberglass Corp | Insulation for pipe fitting |
| US5143408A (en) * | 1991-11-22 | 1992-09-01 | Holtsmark Eric B | Variable size pipe connector |
| WO2007118555A1 (en) * | 2006-04-12 | 2007-10-25 | A. Raymond Et Cie | Fluid line connecting part |
| CN102080752A (en) * | 2011-02-18 | 2011-06-01 | 中航惠腾风电设备股份有限公司 | Pipe joint for vacuum pouring technology |
-
2012
- 2012-06-08 CN CN2012101894074A patent/CN102691849A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3598157A (en) * | 1969-08-04 | 1971-08-10 | Owens Corning Fiberglass Corp | Insulation for pipe fitting |
| US5143408A (en) * | 1991-11-22 | 1992-09-01 | Holtsmark Eric B | Variable size pipe connector |
| WO2007118555A1 (en) * | 2006-04-12 | 2007-10-25 | A. Raymond Et Cie | Fluid line connecting part |
| CN102080752A (en) * | 2011-02-18 | 2011-06-01 | 中航惠腾风电设备股份有限公司 | Pipe joint for vacuum pouring technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120926 |